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, 0xffffffff);
 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         default:
 811                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 812                                         param->param);
 813                 return -EINVAL;
 814         }
 815
 816         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 817                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 818                 return -EFAULT;
 819         }
 820
 821         return 0;
 822 }
 823
 824 static int i915_setparam(struct drm_device *dev, void *data,
 825                          struct drm_file *file_priv)
 826 {
 827         drm_i915_private_t *dev_priv = dev->dev_private;
 828         drm_i915_setparam_t *param = data;
 829
 830         if (!dev_priv) {
 831                 DRM_ERROR("called with no initialization\n");
 832                 return -EINVAL;
 833         }
 834
 835         switch (param->param) {
 836         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 837                 break;
 838         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 839                 dev_priv->tex_lru_log_granularity = param->value;
 840                 break;
 841         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 842                 dev_priv->allow_batchbuffer = param->value;
 843                 break;
 844         case I915_SETPARAM_NUM_USED_FENCES:
 845                 if (param->value > dev_priv->num_fence_regs ||
 846                     param->value < 0)
 847                         return -EINVAL;
 848                 /* Userspace can use first N regs */
 849                 dev_priv->fence_reg_start = param->value;
 850                 break;
 851         default:
 852                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 853                                         param->param);
 854                 return -EINVAL;
 855         }
 856
 857         return 0;
 858 }
 859
 860 static int i915_set_status_page(struct drm_device *dev, void *data,
 861                                 struct drm_file *file_priv)
 862 {
 863         drm_i915_private_t *dev_priv = dev->dev_private;
 864         drm_i915_hws_addr_t *hws = data;
 865
 866         if (!I915_NEED_GFX_HWS(dev))
 867                 return -EINVAL;
 868
 869         if (!dev_priv) {
 870                 DRM_ERROR("called with no initialization\n");
 871                 return -EINVAL;
 872         }
 873
 874         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 875                 WARN(1, "tried to set status page when mode setting active\n");
 876                 return 0;
 877         }
 878
 879         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 880
 881         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 882
 883         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 884         dev_priv->hws_map.size = 4*1024;
 885         dev_priv->hws_map.type = 0;
 886         dev_priv->hws_map.flags = 0;
 887         dev_priv->hws_map.mtrr = 0;
 888
 889         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 890         if (dev_priv->hws_map.handle == NULL) {
 891                 i915_dma_cleanup(dev);
 892                 dev_priv->status_gfx_addr = 0;
 893                 DRM_ERROR("can not ioremap virtual address for"
 894                                 " G33 hw status page\n");
 895                 return -ENOMEM;
 896         }
 897         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 898
 899         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 900         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 901         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 902                                 dev_priv->status_gfx_addr);
 903         DRM_DEBUG_DRIVER("load hws at %p\n",
 904                                 dev_priv->hw_status_page);
 905         return 0;
 906 }
 907
 908 static int i915_get_bridge_dev(struct drm_device *dev)
 909 {
 910         struct drm_i915_private *dev_priv = dev->dev_private;
 911
 912         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 913         if (!dev_priv->bridge_dev) {
 914                 DRM_ERROR("bridge device not found\n");
 915                 return -1;
 916         }
 917         return 0;
 918 }
 919
 920 /**
 921  * i915_probe_agp - get AGP bootup configuration
 922  * @pdev: PCI device
 923  * @aperture_size: returns AGP aperture configured size
 924  * @preallocated_size: returns size of BIOS preallocated AGP space
 925  *
 926  * Since Intel integrated graphics are UMA, the BIOS has to set aside
 927  * some RAM for the framebuffer at early boot.  This code figures out
 928  * how much was set aside so we can use it for our own purposes.
 929  */
 930 static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,
 931                           uint32_t *preallocated_size,
 932                           uint32_t *start)
 933 {
 934         struct drm_i915_private *dev_priv = dev->dev_private;
 935         u16 tmp = 0;
 936         unsigned long overhead;
 937         unsigned long stolen;
 938
 939         /* Get the fb aperture size and "stolen" memory amount. */
 940         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp);
 941
 942         *aperture_size = 1024 * 1024;
 943         *preallocated_size = 1024 * 1024;
 944
 945         switch (dev->pdev->device) {
 946         case PCI_DEVICE_ID_INTEL_82830_CGC:
 947         case PCI_DEVICE_ID_INTEL_82845G_IG:
 948         case PCI_DEVICE_ID_INTEL_82855GM_IG:
 949         case PCI_DEVICE_ID_INTEL_82865_IG:
 950                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
 951                         *aperture_size *= 64;
 952                 else
 953                         *aperture_size *= 128;
 954                 break;
 955         default:
 956                 /* 9xx supports large sizes, just look at the length */
 957                 *aperture_size = pci_resource_len(dev->pdev, 2);
 958                 break;
 959         }
 960
 961         /*
 962          * Some of the preallocated space is taken by the GTT
 963          * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
 964          */
 965         if (IS_G4X(dev) || IS_IGD(dev) || IS_IGDNG(dev))
 966                 overhead = 4096;
 967         else
 968                 overhead = (*aperture_size / 1024) + 4096;
 969
 970         switch (tmp & INTEL_GMCH_GMS_MASK) {
 971         case INTEL_855_GMCH_GMS_DISABLED:
 972                 DRM_ERROR("video memory is disabled\n");
 973                 return -1;
 974         case INTEL_855_GMCH_GMS_STOLEN_1M:
 975                 stolen = 1 * 1024 * 1024;
 976                 break;
 977         case INTEL_855_GMCH_GMS_STOLEN_4M:
 978                 stolen = 4 * 1024 * 1024;
 979                 break;
 980         case INTEL_855_GMCH_GMS_STOLEN_8M:
 981                 stolen = 8 * 1024 * 1024;
 982                 break;
 983         case INTEL_855_GMCH_GMS_STOLEN_16M:
 984                 stolen = 16 * 1024 * 1024;
 985                 break;
 986         case INTEL_855_GMCH_GMS_STOLEN_32M:
 987                 stolen = 32 * 1024 * 1024;
 988                 break;
 989         case INTEL_915G_GMCH_GMS_STOLEN_48M:
 990                 stolen = 48 * 1024 * 1024;
 991                 break;
 992         case INTEL_915G_GMCH_GMS_STOLEN_64M:
 993                 stolen = 64 * 1024 * 1024;
 994                 break;
 995         case INTEL_GMCH_GMS_STOLEN_128M:
 996                 stolen = 128 * 1024 * 1024;
 997                 break;
 998         case INTEL_GMCH_GMS_STOLEN_256M:
 999                 stolen = 256 * 1024 * 1024;
1000                 break;
1001         case INTEL_GMCH_GMS_STOLEN_96M:
1002                 stolen = 96 * 1024 * 1024;
1003                 break;
1004         case INTEL_GMCH_GMS_STOLEN_160M:
1005                 stolen = 160 * 1024 * 1024;
1006                 break;
1007         case INTEL_GMCH_GMS_STOLEN_224M:
1008                 stolen = 224 * 1024 * 1024;
1009                 break;
1010         case INTEL_GMCH_GMS_STOLEN_352M:
1011                 stolen = 352 * 1024 * 1024;
1012                 break;
1013         default:
1014                 DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1015                         tmp & INTEL_GMCH_GMS_MASK);
1016                 return -1;
1017         }
1018         *preallocated_size = stolen - overhead;
1019         *start = overhead;
1020
1021         return 0;
1022 }
1023
1024 #define PTE_ADDRESS_MASK                0xfffff000
1025 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1026 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1027 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1028 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1029 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1030 #define PTE_VALID                       (1 << 0)
1031
1032 /**
1033  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1034  * @dev: drm device
1035  * @gtt_addr: address to translate
1036  *
1037  * Some chip functions require allocations from stolen space but need the
1038  * physical address of the memory in question.  We use this routine
1039  * to get a physical address suitable for register programming from a given
1040  * GTT address.
1041  */
1042 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1043                                       unsigned long gtt_addr)
1044 {
1045         unsigned long *gtt;
1046         unsigned long entry, phys;
1047         int gtt_bar = IS_I9XX(dev) ? 0 : 1;
1048         int gtt_offset, gtt_size;
1049
1050         if (IS_I965G(dev)) {
1051                 if (IS_G4X(dev) || IS_IGDNG(dev)) {
1052                         gtt_offset = 2*1024*1024;
1053                         gtt_size = 2*1024*1024;
1054                 } else {
1055                         gtt_offset = 512*1024;
1056                         gtt_size = 512*1024;
1057                 }
1058         } else {
1059                 gtt_bar = 3;
1060                 gtt_offset = 0;
1061                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1062         }
1063
1064         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1065                          gtt_size);
1066         if (!gtt) {
1067                 DRM_ERROR("ioremap of GTT failed\n");
1068                 return 0;
1069         }
1070
1071         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1072
1073         DRM_DEBUG("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1074
1075         /* Mask out these reserved bits on this hardware. */
1076         if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||
1077             IS_I945G(dev) || IS_I945GM(dev)) {
1078                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1079         }
1080
1081         /* If it's not a mapping type we know, then bail. */
1082         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1083             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1084                 iounmap(gtt);
1085                 return 0;
1086         }
1087
1088         if (!(entry & PTE_VALID)) {
1089                 DRM_ERROR("bad GTT entry in stolen space\n");
1090                 iounmap(gtt);
1091                 return 0;
1092         }
1093
1094         iounmap(gtt);
1095
1096         phys =(entry & PTE_ADDRESS_MASK) |
1097                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1098
1099         DRM_DEBUG("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1100
1101         return phys;
1102 }
1103
1104 static void i915_warn_stolen(struct drm_device *dev)
1105 {
1106         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1107         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1108 }
1109
1110 static void i915_setup_compression(struct drm_device *dev, int size)
1111 {
1112         struct drm_i915_private *dev_priv = dev->dev_private;
1113         struct drm_mm_node *compressed_fb, *compressed_llb;
1114         unsigned long cfb_base, ll_base;
1115
1116         /* Leave 1M for line length buffer & misc. */
1117         compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);
1118         if (!compressed_fb) {
1119                 i915_warn_stolen(dev);
1120                 return;
1121         }
1122
1123         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1124         if (!compressed_fb) {
1125                 i915_warn_stolen(dev);
1126                 return;
1127         }
1128
1129         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1130         if (!cfb_base) {
1131                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1132                 drm_mm_put_block(compressed_fb);
1133         }
1134
1135         if (!IS_GM45(dev)) {
1136                 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
1137                                                     4096, 0);
1138                 if (!compressed_llb) {
1139                         i915_warn_stolen(dev);
1140                         return;
1141                 }
1142
1143                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1144                 if (!compressed_llb) {
1145                         i915_warn_stolen(dev);
1146                         return;
1147                 }
1148
1149                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1150                 if (!ll_base) {
1151                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1152                         drm_mm_put_block(compressed_fb);
1153                         drm_mm_put_block(compressed_llb);
1154                 }
1155         }
1156
1157         dev_priv->cfb_size = size;
1158
1159         if (IS_GM45(dev)) {
1160                 g4x_disable_fbc(dev);
1161                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1162         } else {
1163                 i8xx_disable_fbc(dev);
1164                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1165                 I915_WRITE(FBC_LL_BASE, ll_base);
1166         }
1167
1168         DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1169                   ll_base, size >> 20);
1170 }
1171
1172 /* true = enable decode, false = disable decoder */
1173 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1174 {
1175         struct drm_device *dev = cookie;
1176
1177         intel_modeset_vga_set_state(dev, state);
1178         if (state)
1179                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1180                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1181         else
1182                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1183 }
1184
1185 static int i915_load_modeset_init(struct drm_device *dev,
1186                                   unsigned long prealloc_start,
1187                                   unsigned long prealloc_size,
1188                                   unsigned long agp_size)
1189 {
1190         struct drm_i915_private *dev_priv = dev->dev_private;
1191         int fb_bar = IS_I9XX(dev) ? 2 : 0;
1192         int ret = 0;
1193
1194         dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
1195                 0xff000000;
1196
1197         if (IS_MOBILE(dev) || IS_I9XX(dev))
1198                 dev_priv->cursor_needs_physical = true;
1199         else
1200                 dev_priv->cursor_needs_physical = false;
1201
1202         if (IS_I965G(dev) || IS_G33(dev))
1203                 dev_priv->cursor_needs_physical = false;
1204
1205         /* Basic memrange allocator for stolen space (aka vram) */
1206         drm_mm_init(&dev_priv->vram, 0, prealloc_size);
1207         DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));
1208
1209         /* We're off and running w/KMS */
1210         dev_priv->mm.suspended = 0;
1211
1212         /* Let GEM Manage from end of prealloc space to end of aperture.
1213          *
1214          * However, leave one page at the end still bound to the scratch page.
1215          * There are a number of places where the hardware apparently
1216          * prefetches past the end of the object, and we've seen multiple
1217          * hangs with the GPU head pointer stuck in a batchbuffer bound
1218          * at the last page of the aperture.  One page should be enough to
1219          * keep any prefetching inside of the aperture.
1220          */
1221         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1222
1223         mutex_lock(&dev->struct_mutex);
1224         ret = i915_gem_init_ringbuffer(dev);
1225         mutex_unlock(&dev->struct_mutex);
1226         if (ret)
1227                 goto out;
1228
1229         /* Try to set up FBC with a reasonable compressed buffer size */
1230         if (IS_MOBILE(dev) && (IS_I9XX(dev) || IS_I965G(dev) || IS_GM45(dev)) &&
1231             i915_powersave) {
1232                 int cfb_size;
1233
1234                 /* Try to get an 8M buffer... */
1235                 if (prealloc_size > (9*1024*1024))
1236                         cfb_size = 8*1024*1024;
1237                 else /* fall back to 7/8 of the stolen space */
1238                         cfb_size = prealloc_size * 7 / 8;
1239                 i915_setup_compression(dev, cfb_size);
1240         }
1241
1242         /* Allow hardware batchbuffers unless told otherwise.
1243          */
1244         dev_priv->allow_batchbuffer = 1;
1245
1246         ret = intel_init_bios(dev);
1247         if (ret)
1248                 DRM_INFO("failed to find VBIOS tables\n");
1249
1250         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1251         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1252         if (ret)
1253                 goto destroy_ringbuffer;
1254
1255         ret = drm_irq_install(dev);
1256         if (ret)
1257                 goto destroy_ringbuffer;
1258
1259         /* Always safe in the mode setting case. */
1260         /* FIXME: do pre/post-mode set stuff in core KMS code */
1261         dev->vblank_disable_allowed = 1;
1262
1263         /*
1264          * Initialize the hardware status page IRQ location.
1265          */
1266
1267         I915_WRITE(INSTPM, (1 << 5) | (1 << 21));
1268
1269         intel_modeset_init(dev);
1270
1271         drm_helper_initial_config(dev);
1272
1273         return 0;
1274
1275 destroy_ringbuffer:
1276         i915_gem_cleanup_ringbuffer(dev);
1277 out:
1278         return ret;
1279 }
1280
1281 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1282 {
1283         struct drm_i915_master_private *master_priv;
1284
1285         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1286         if (!master_priv)
1287                 return -ENOMEM;
1288
1289         master->driver_priv = master_priv;
1290         return 0;
1291 }
1292
1293 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1294 {
1295         struct drm_i915_master_private *master_priv = master->driver_priv;
1296
1297         if (!master_priv)
1298                 return;
1299
1300         kfree(master_priv);
1301
1302         master->driver_priv = NULL;
1303 }
1304
1305 static void i915_get_mem_freq(struct drm_device *dev)
1306 {
1307         drm_i915_private_t *dev_priv = dev->dev_private;
1308         u32 tmp;
1309
1310         if (!IS_IGD(dev))
1311                 return;
1312
1313         tmp = I915_READ(CLKCFG);
1314
1315         switch (tmp & CLKCFG_FSB_MASK) {
1316         case CLKCFG_FSB_533:
1317                 dev_priv->fsb_freq = 533; /* 133*4 */
1318                 break;
1319         case CLKCFG_FSB_800:
1320                 dev_priv->fsb_freq = 800; /* 200*4 */
1321                 break;
1322         case CLKCFG_FSB_667:
1323                 dev_priv->fsb_freq =  667; /* 167*4 */
1324                 break;
1325         case CLKCFG_FSB_400:
1326                 dev_priv->fsb_freq = 400; /* 100*4 */
1327                 break;
1328         }
1329
1330         switch (tmp & CLKCFG_MEM_MASK) {
1331         case CLKCFG_MEM_533:
1332                 dev_priv->mem_freq = 533;
1333                 break;
1334         case CLKCFG_MEM_667:
1335                 dev_priv->mem_freq = 667;
1336                 break;
1337         case CLKCFG_MEM_800:
1338                 dev_priv->mem_freq = 800;
1339                 break;
1340         }
1341 }
1342
1343 /**
1344  * i915_driver_load - setup chip and create an initial config
1345  * @dev: DRM device
1346  * @flags: startup flags
1347  *
1348  * The driver load routine has to do several things:
1349  *   - drive output discovery via intel_modeset_init()
1350  *   - initialize the memory manager
1351  *   - allocate initial config memory
1352  *   - setup the DRM framebuffer with the allocated memory
1353  */
1354 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1355 {
1356         struct drm_i915_private *dev_priv = dev->dev_private;
1357         resource_size_t base, size;
1358         int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;
1359         uint32_t agp_size, prealloc_size, prealloc_start;
1360
1361         /* i915 has 4 more counters */
1362         dev->counters += 4;
1363         dev->types[6] = _DRM_STAT_IRQ;
1364         dev->types[7] = _DRM_STAT_PRIMARY;
1365         dev->types[8] = _DRM_STAT_SECONDARY;
1366         dev->types[9] = _DRM_STAT_DMA;
1367
1368         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1369         if (dev_priv == NULL)
1370                 return -ENOMEM;
1371
1372         dev->dev_private = (void *)dev_priv;
1373         dev_priv->dev = dev;
1374
1375         /* Add register map (needed for suspend/resume) */
1376         base = drm_get_resource_start(dev, mmio_bar);
1377         size = drm_get_resource_len(dev, mmio_bar);
1378
1379         if (i915_get_bridge_dev(dev)) {
1380                 ret = -EIO;
1381                 goto free_priv;
1382         }
1383
1384         dev_priv->regs = ioremap(base, size);
1385         if (!dev_priv->regs) {
1386                 DRM_ERROR("failed to map registers\n");
1387                 ret = -EIO;
1388                 goto put_bridge;
1389         }
1390
1391         dev_priv->mm.gtt_mapping =
1392                 io_mapping_create_wc(dev->agp->base,
1393                                      dev->agp->agp_info.aper_size * 1024*1024);
1394         if (dev_priv->mm.gtt_mapping == NULL) {
1395                 ret = -EIO;
1396                 goto out_rmmap;
1397         }
1398
1399         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1400          * one would think, because the kernel disables PAT on first
1401          * generation Core chips because WC PAT gets overridden by a UC
1402          * MTRR if present.  Even if a UC MTRR isn't present.
1403          */
1404         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1405                                          dev->agp->agp_info.aper_size *
1406                                          1024 * 1024,
1407                                          MTRR_TYPE_WRCOMB, 1);
1408         if (dev_priv->mm.gtt_mtrr < 0) {
1409                 DRM_INFO("MTRR allocation failed.  Graphics "
1410                          "performance may suffer.\n");
1411         }
1412
1413         ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);
1414         if (ret)
1415                 goto out_iomapfree;
1416
1417         dev_priv->wq = create_workqueue("i915");
1418         if (dev_priv->wq == NULL) {
1419                 DRM_ERROR("Failed to create our workqueue.\n");
1420                 ret = -ENOMEM;
1421                 goto out_iomapfree;
1422         }
1423
1424         /* enable GEM by default */
1425         dev_priv->has_gem = 1;
1426
1427         if (prealloc_size > agp_size * 3 / 4) {
1428                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
1429                           "memory stolen.\n",
1430                           prealloc_size / 1024, agp_size / 1024);
1431                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
1432                           "updating the BIOS to fix).\n");
1433                 dev_priv->has_gem = 0;
1434         }
1435
1436         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1437         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1438         if (IS_G4X(dev) || IS_IGDNG(dev)) {
1439                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1440                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1441         }
1442
1443         i915_gem_load(dev);
1444
1445         /* Init HWS */
1446         if (!I915_NEED_GFX_HWS(dev)) {
1447                 ret = i915_init_phys_hws(dev);
1448                 if (ret != 0)
1449                         goto out_workqueue_free;
1450         }
1451
1452         i915_get_mem_freq(dev);
1453
1454         /* On the 945G/GM, the chipset reports the MSI capability on the
1455          * integrated graphics even though the support isn't actually there
1456          * according to the published specs.  It doesn't appear to function
1457          * correctly in testing on 945G.
1458          * This may be a side effect of MSI having been made available for PEG
1459          * and the registers being closely associated.
1460          *
1461          * According to chipset errata, on the 965GM, MSI interrupts may
1462          * be lost or delayed, but we use them anyways to avoid
1463          * stuck interrupts on some machines.
1464          */
1465         if (!IS_I945G(dev) && !IS_I945GM(dev))
1466                 pci_enable_msi(dev->pdev);
1467
1468         spin_lock_init(&dev_priv->user_irq_lock);
1469         spin_lock_init(&dev_priv->error_lock);
1470         dev_priv->user_irq_refcount = 0;
1471         dev_priv->trace_irq_seqno = 0;
1472
1473         ret = drm_vblank_init(dev, I915_NUM_PIPE);
1474
1475         if (ret) {
1476                 (void) i915_driver_unload(dev);
1477                 return ret;
1478         }
1479
1480         /* Start out suspended */
1481         dev_priv->mm.suspended = 1;
1482
1483         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1484                 ret = i915_load_modeset_init(dev, prealloc_start,
1485                                              prealloc_size, agp_size);
1486                 if (ret < 0) {
1487                         DRM_ERROR("failed to init modeset\n");
1488                         goto out_workqueue_free;
1489                 }
1490         }
1491
1492         /* Must be done after probing outputs */
1493         /* FIXME: verify on IGDNG */
1494         if (!IS_IGDNG(dev))
1495                 intel_opregion_init(dev, 0);
1496
1497         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
1498                     (unsigned long) dev);
1499         return 0;
1500
1501 out_workqueue_free:
1502         destroy_workqueue(dev_priv->wq);
1503 out_iomapfree:
1504         io_mapping_free(dev_priv->mm.gtt_mapping);
1505 out_rmmap:
1506         iounmap(dev_priv->regs);
1507 put_bridge:
1508         pci_dev_put(dev_priv->bridge_dev);
1509 free_priv:
1510         kfree(dev_priv);
1511         return ret;
1512 }
1513
1514 int i915_driver_unload(struct drm_device *dev)
1515 {
1516         struct drm_i915_private *dev_priv = dev->dev_private;
1517
1518         destroy_workqueue(dev_priv->wq);
1519         del_timer_sync(&dev_priv->hangcheck_timer);
1520
1521         io_mapping_free(dev_priv->mm.gtt_mapping);
1522         if (dev_priv->mm.gtt_mtrr >= 0) {
1523                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
1524                          dev->agp->agp_info.aper_size * 1024 * 1024);
1525                 dev_priv->mm.gtt_mtrr = -1;
1526         }
1527
1528         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1529                 drm_irq_uninstall(dev);
1530                 vga_client_register(dev->pdev, NULL, NULL, NULL);
1531         }
1532
1533         if (dev->pdev->msi_enabled)
1534                 pci_disable_msi(dev->pdev);
1535
1536         if (dev_priv->regs != NULL)
1537                 iounmap(dev_priv->regs);
1538
1539         if (!IS_IGDNG(dev))
1540                 intel_opregion_free(dev, 0);
1541
1542         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1543                 intel_modeset_cleanup(dev);
1544
1545                 i915_gem_free_all_phys_object(dev);
1546
1547                 mutex_lock(&dev->struct_mutex);
1548                 i915_gem_cleanup_ringbuffer(dev);
1549                 mutex_unlock(&dev->struct_mutex);
1550                 drm_mm_takedown(&dev_priv->vram);
1551                 i915_gem_lastclose(dev);
1552         }
1553
1554         pci_dev_put(dev_priv->bridge_dev);
1555         kfree(dev->dev_private);
1556
1557         return 0;
1558 }
1559
1560 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
1561 {
1562         struct drm_i915_file_private *i915_file_priv;
1563
1564         DRM_DEBUG_DRIVER("\n");
1565         i915_file_priv = (struct drm_i915_file_private *)
1566             kmalloc(sizeof(*i915_file_priv), GFP_KERNEL);
1567
1568         if (!i915_file_priv)
1569                 return -ENOMEM;
1570
1571         file_priv->driver_priv = i915_file_priv;
1572
1573         INIT_LIST_HEAD(&i915_file_priv->mm.request_list);
1574
1575         return 0;
1576 }
1577
1578 /**
1579  * i915_driver_lastclose - clean up after all DRM clients have exited
1580  * @dev: DRM device
1581  *
1582  * Take care of cleaning up after all DRM clients have exited.  In the
1583  * mode setting case, we want to restore the kernel's initial mode (just
1584  * in case the last client left us in a bad state).
1585  *
1586  * Additionally, in the non-mode setting case, we'll tear down the AGP
1587  * and DMA structures, since the kernel won't be using them, and clea
1588  * up any GEM state.
1589  */
1590 void i915_driver_lastclose(struct drm_device * dev)
1591 {
1592         drm_i915_private_t *dev_priv = dev->dev_private;
1593
1594         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
1595                 drm_fb_helper_restore();
1596                 return;
1597         }
1598
1599         i915_gem_lastclose(dev);
1600
1601         if (dev_priv->agp_heap)
1602                 i915_mem_takedown(&(dev_priv->agp_heap));
1603
1604         i915_dma_cleanup(dev);
1605 }
1606
1607 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1608 {
1609         drm_i915_private_t *dev_priv = dev->dev_private;
1610         i915_gem_release(dev, file_priv);
1611         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1612                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
1613 }
1614
1615 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
1616 {
1617         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
1618
1619         kfree(i915_file_priv);
1620 }
1621
1622 struct drm_ioctl_desc i915_ioctls[] = {
1623         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1624         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
1625         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
1626         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
1627         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
1628         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
1629         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
1630         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1631         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
1632         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
1633         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1634         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
1635         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1636         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1637         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
1638         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
1639         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1640         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1641         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
1642         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1643         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1644         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
1645         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
1646         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1647         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1648         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
1649         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
1650         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
1651         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
1652         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, 0),
1653         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
1654         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
1655         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
1656         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
1657         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
1658         DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
1659         DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, 0),
1660 };
1661
1662 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1663
1664 /**
1665  * Determine if the device really is AGP or not.
1666  *
1667  * All Intel graphics chipsets are treated as AGP, even if they are really
1668  * PCI-e.
1669  *
1670  * \param dev   The device to be tested.
1671  *
1672  * \returns
1673  * A value of 1 is always retured to indictate every i9x5 is AGP.
1674  */
1675 int i915_driver_device_is_agp(struct drm_device * dev)
1676 {
1677         return 1;
1678 }