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         if (IS_I965G(dev))
 138                 dev_priv->dma_status_page |= (dev_priv->dma_status_page >> 28) &
 139                                              0xf0;
 140
 141         I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 142         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 143         return 0;
 144 }
 145
 146 /**
 147  * Frees the hardware status page, whether it's a physical address or a virtual
 148  * address set up by the X Server.
 149  */
 150 static void i915_free_hws(struct drm_device *dev)
 151 {
 152         drm_i915_private_t *dev_priv = dev->dev_private;
 153         if (dev_priv->status_page_dmah) {
 154                 drm_pci_free(dev, dev_priv->status_page_dmah);
 155                 dev_priv->status_page_dmah = NULL;
 156         }
 157
 158         if (dev_priv->status_gfx_addr) {
 159                 dev_priv->status_gfx_addr = 0;
 160                 drm_core_ioremapfree(&dev_priv->hws_map, dev);
 161         }
 162
 163         /* Need to rewrite hardware status page */
 164         I915_WRITE(HWS_PGA, 0x1ffff000);
 165 }
 166
 167 void i915_kernel_lost_context(struct drm_device * dev)
 168 {
 169         drm_i915_private_t *dev_priv = dev->dev_private;
 170         struct drm_i915_master_private *master_priv;
 171         drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
 172
 173         /*
 174          * We should never lose context on the ring with modesetting
 175          * as we don't expose it to userspace
 176          */
 177         if (drm_core_check_feature(dev, DRIVER_MODESET))
 178                 return;
 179
 180         ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
 181         ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
 182         ring->space = ring->head - (ring->tail + 8);
 183         if (ring->space < 0)
 184                 ring->space += ring->Size;
 185
 186         if (!dev->primary->master)
 187                 return;
 188
 189         master_priv = dev->primary->master->driver_priv;
 190         if (ring->head == ring->tail && master_priv->sarea_priv)
 191                 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 192 }
 193
 194 static int i915_dma_cleanup(struct drm_device * dev)
 195 {
 196         drm_i915_private_t *dev_priv = dev->dev_private;
 197         /* Make sure interrupts are disabled here because the uninstall ioctl
 198          * may not have been called from userspace and after dev_private
 199          * is freed, it's too late.
 200          */
 201         if (dev->irq_enabled)
 202                 drm_irq_uninstall(dev);
 203
 204         if (dev_priv->ring.virtual_start) {
 205                 drm_core_ioremapfree(&dev_priv->ring.map, dev);
 206                 dev_priv->ring.virtual_start = NULL;
 207                 dev_priv->ring.map.handle = NULL;
 208                 dev_priv->ring.map.size = 0;
 209         }
 210
 211         /* Clear the HWS virtual address at teardown */
 212         if (I915_NEED_GFX_HWS(dev))
 213                 i915_free_hws(dev);
 214
 215         return 0;
 216 }
 217
 218 static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 219 {
 220         drm_i915_private_t *dev_priv = dev->dev_private;
 221         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 222
 223         master_priv->sarea = drm_getsarea(dev);
 224         if (master_priv->sarea) {
 225                 master_priv->sarea_priv = (drm_i915_sarea_t *)
 226                         ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 227         } else {
 228                 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 229         }
 230
 231         if (init->ring_size != 0) {
 232                 if (dev_priv->ring.ring_obj != NULL) {
 233                         i915_dma_cleanup(dev);
 234                         DRM_ERROR("Client tried to initialize ringbuffer in "
 235                                   "GEM mode\n");
 236                         return -EINVAL;
 237                 }
 238
 239                 dev_priv->ring.Size = init->ring_size;
 240
 241                 dev_priv->ring.map.offset = init->ring_start;
 242                 dev_priv->ring.map.size = init->ring_size;
 243                 dev_priv->ring.map.type = 0;
 244                 dev_priv->ring.map.flags = 0;
 245                 dev_priv->ring.map.mtrr = 0;
 246
 247                 drm_core_ioremap_wc(&dev_priv->ring.map, dev);
 248
 249                 if (dev_priv->ring.map.handle == NULL) {
 250                         i915_dma_cleanup(dev);
 251                         DRM_ERROR("can not ioremap virtual address for"
 252                                   " ring buffer\n");
 253                         return -ENOMEM;
 254                 }
 255         }
 256
 257         dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
 258
 259         dev_priv->cpp = init->cpp;
 260         dev_priv->back_offset = init->back_offset;
 261         dev_priv->front_offset = init->front_offset;
 262         dev_priv->current_page = 0;
 263         if (master_priv->sarea_priv)
 264                 master_priv->sarea_priv->pf_current_page = 0;
 265
 266         /* Allow hardware batchbuffers unless told otherwise.
 267          */
 268         dev_priv->allow_batchbuffer = 1;
 269
 270         return 0;
 271 }
 272
 273 static int i915_dma_resume(struct drm_device * dev)
 274 {
 275         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 276
 277         DRM_DEBUG_DRIVER("%s\n", __func__);
 278
 279         if (dev_priv->ring.map.handle == NULL) {
 280                 DRM_ERROR("can not ioremap virtual address for"
 281                           " ring buffer\n");
 282                 return -ENOMEM;
 283         }
 284
 285         /* Program Hardware Status Page */
 286         if (!dev_priv->hw_status_page) {
 287                 DRM_ERROR("Can not find hardware status page\n");
 288                 return -EINVAL;
 289         }
 290         DRM_DEBUG_DRIVER("hw status page @ %p\n",
 291                                 dev_priv->hw_status_page);
 292
 293         if (dev_priv->status_gfx_addr != 0)
 294                 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 295         else
 296                 I915_WRITE(HWS_PGA, dev_priv->dma_status_page);
 297         DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 298
 299         return 0;
 300 }
 301
 302 static int i915_dma_init(struct drm_device *dev, void *data,
 303                          struct drm_file *file_priv)
 304 {
 305         drm_i915_init_t *init = data;
 306         int retcode = 0;
 307
 308         switch (init->func) {
 309         case I915_INIT_DMA:
 310                 retcode = i915_initialize(dev, init);
 311                 break;
 312         case I915_CLEANUP_DMA:
 313                 retcode = i915_dma_cleanup(dev);
 314                 break;
 315         case I915_RESUME_DMA:
 316                 retcode = i915_dma_resume(dev);
 317                 break;
 318         default:
 319                 retcode = -EINVAL;
 320                 break;
 321         }
 322
 323         return retcode;
 324 }
 325
 326 /* Implement basically the same security restrictions as hardware does
 327  * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 328  *
 329  * Most of the calculations below involve calculating the size of a
 330  * particular instruction.  It's important to get the size right as
 331  * that tells us where the next instruction to check is.  Any illegal
 332  * instruction detected will be given a size of zero, which is a
 333  * signal to abort the rest of the buffer.
 334  */
 335 static int do_validate_cmd(int cmd)
 336 {
 337         switch (((cmd >> 29) & 0x7)) {
 338         case 0x0:
 339                 switch ((cmd >> 23) & 0x3f) {
 340                 case 0x0:
 341                         return 1;       /* MI_NOOP */
 342                 case 0x4:
 343                         return 1;       /* MI_FLUSH */
 344                 default:
 345                         return 0;       /* disallow everything else */
 346                 }
 347                 break;
 348         case 0x1:
 349                 return 0;       /* reserved */
 350         case 0x2:
 351                 return (cmd & 0xff) + 2;        /* 2d commands */
 352         case 0x3:
 353                 if (((cmd >> 24) & 0x1f) <= 0x18)
 354                         return 1;
 355
 356                 switch ((cmd >> 24) & 0x1f) {
 357                 case 0x1c:
 358                         return 1;
 359                 case 0x1d:
 360                         switch ((cmd >> 16) & 0xff) {
 361                         case 0x3:
 362                                 return (cmd & 0x1f) + 2;
 363                         case 0x4:
 364                                 return (cmd & 0xf) + 2;
 365                         default:
 366                                 return (cmd & 0xffff) + 2;
 367                         }
 368                 case 0x1e:
 369                         if (cmd & (1 << 23))
 370                                 return (cmd & 0xffff) + 1;
 371                         else
 372                                 return 1;
 373                 case 0x1f:
 374                         if ((cmd & (1 << 23)) == 0)     /* inline vertices */
 375                                 return (cmd & 0x1ffff) + 2;
 376                         else if (cmd & (1 << 17))       /* indirect random */
 377                                 if ((cmd & 0xffff) == 0)
 378                                         return 0;       /* unknown length, too hard */
 379                                 else
 380                                         return (((cmd & 0xffff) + 1) / 2) + 1;
 381                         else
 382                                 return 2;       /* indirect sequential */
 383                 default:
 384                         return 0;
 385                 }
 386         default:
 387                 return 0;
 388         }
 389
 390         return 0;
 391 }
 392
 393 static int validate_cmd(int cmd)
 394 {
 395         int ret = do_validate_cmd(cmd);
 396
 397 /*      printk("validate_cmd( %x ): %d\n", cmd, ret); */
 398
 399         return ret;
 400 }
 401
 402 static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 403 {
 404         drm_i915_private_t *dev_priv = dev->dev_private;
 405         int i;
 406         RING_LOCALS;
 407
 408         if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
 409                 return -EINVAL;
 410
 411         BEGIN_LP_RING((dwords+1)&~1);
 412
 413         for (i = 0; i < dwords;) {
 414                 int cmd, sz;
 415
 416                 cmd = buffer[i];
 417
 418                 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
 419                         return -EINVAL;
 420
 421                 OUT_RING(cmd);
 422
 423                 while (++i, --sz) {
 424                         OUT_RING(buffer[i]);
 425                 }
 426         }
 427
 428         if (dwords & 1)
 429                 OUT_RING(0);
 430
 431         ADVANCE_LP_RING();
 432
 433         return 0;
 434 }
 435
 436 int
 437 i915_emit_box(struct drm_device *dev,
 438               struct drm_clip_rect *boxes,
 439               int i, int DR1, int DR4)
 440 {
 441         drm_i915_private_t *dev_priv = dev->dev_private;
 442         struct drm_clip_rect box = boxes[i];
 443         RING_LOCALS;
 444
 445         if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
 446                 DRM_ERROR("Bad box %d,%d..%d,%d\n",
 447                           box.x1, box.y1, box.x2, box.y2);
 448                 return -EINVAL;
 449         }
 450
 451         if (IS_I965G(dev)) {
 452                 BEGIN_LP_RING(4);
 453                 OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 454                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 455                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 456                 OUT_RING(DR4);
 457                 ADVANCE_LP_RING();
 458         } else {
 459                 BEGIN_LP_RING(6);
 460                 OUT_RING(GFX_OP_DRAWRECT_INFO);
 461                 OUT_RING(DR1);
 462                 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
 463                 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
 464                 OUT_RING(DR4);
 465                 OUT_RING(0);
 466                 ADVANCE_LP_RING();
 467         }
 468
 469         return 0;
 470 }
 471
 472 /* XXX: Emitting the counter should really be moved to part of the IRQ
 473  * emit. For now, do it in both places:
 474  */
 475
 476 static void i915_emit_breadcrumb(struct drm_device *dev)
 477 {
 478         drm_i915_private_t *dev_priv = dev->dev_private;
 479         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 480         RING_LOCALS;
 481
 482         dev_priv->counter++;
 483         if (dev_priv->counter > 0x7FFFFFFFUL)
 484                 dev_priv->counter = 0;
 485         if (master_priv->sarea_priv)
 486                 master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 487
 488         BEGIN_LP_RING(4);
 489         OUT_RING(MI_STORE_DWORD_INDEX);
 490         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 491         OUT_RING(dev_priv->counter);
 492         OUT_RING(0);
 493         ADVANCE_LP_RING();
 494 }
 495
 496 static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 497                                    drm_i915_cmdbuffer_t *cmd,
 498                                    struct drm_clip_rect *cliprects,
 499                                    void *cmdbuf)
 500 {
 501         int nbox = cmd->num_cliprects;
 502         int i = 0, count, ret;
 503
 504         if (cmd->sz & 0x3) {
 505                 DRM_ERROR("alignment");
 506                 return -EINVAL;
 507         }
 508
 509         i915_kernel_lost_context(dev);
 510
 511         count = nbox ? nbox : 1;
 512
 513         for (i = 0; i < count; i++) {
 514                 if (i < nbox) {
 515                         ret = i915_emit_box(dev, cliprects, i,
 516                                             cmd->DR1, cmd->DR4);
 517                         if (ret)
 518                                 return ret;
 519                 }
 520
 521                 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 522                 if (ret)
 523                         return ret;
 524         }
 525
 526         i915_emit_breadcrumb(dev);
 527         return 0;
 528 }
 529
 530 static int i915_dispatch_batchbuffer(struct drm_device * dev,
 531                                      drm_i915_batchbuffer_t * batch,
 532                                      struct drm_clip_rect *cliprects)
 533 {
 534         drm_i915_private_t *dev_priv = dev->dev_private;
 535         int nbox = batch->num_cliprects;
 536         int i = 0, count;
 537         RING_LOCALS;
 538
 539         if ((batch->start | batch->used) & 0x7) {
 540                 DRM_ERROR("alignment");
 541                 return -EINVAL;
 542         }
 543
 544         i915_kernel_lost_context(dev);
 545
 546         count = nbox ? nbox : 1;
 547
 548         for (i = 0; i < count; i++) {
 549                 if (i < nbox) {
 550                         int ret = i915_emit_box(dev, cliprects, i,
 551                                                 batch->DR1, batch->DR4);
 552                         if (ret)
 553                                 return ret;
 554                 }
 555
 556                 if (!IS_I830(dev) && !IS_845G(dev)) {
 557                         BEGIN_LP_RING(2);
 558                         if (IS_I965G(dev)) {
 559                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 560                                 OUT_RING(batch->start);
 561                         } else {
 562                                 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 563                                 OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 564                         }
 565                         ADVANCE_LP_RING();
 566                 } else {
 567                         BEGIN_LP_RING(4);
 568                         OUT_RING(MI_BATCH_BUFFER);
 569                         OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 570                         OUT_RING(batch->start + batch->used - 4);
 571                         OUT_RING(0);
 572                         ADVANCE_LP_RING();
 573                 }
 574         }
 575
 576         i915_emit_breadcrumb(dev);
 577
 578         return 0;
 579 }
 580
 581 static int i915_dispatch_flip(struct drm_device * dev)
 582 {
 583         drm_i915_private_t *dev_priv = dev->dev_private;
 584         struct drm_i915_master_private *master_priv =
 585                 dev->primary->master->driver_priv;
 586         RING_LOCALS;
 587
 588         if (!master_priv->sarea_priv)
 589                 return -EINVAL;
 590
 591         DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 592                           __func__,
 593                          dev_priv->current_page,
 594                          master_priv->sarea_priv->pf_current_page);
 595
 596         i915_kernel_lost_context(dev);
 597
 598         BEGIN_LP_RING(2);
 599         OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 600         OUT_RING(0);
 601         ADVANCE_LP_RING();
 602
 603         BEGIN_LP_RING(6);
 604         OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 605         OUT_RING(0);
 606         if (dev_priv->current_page == 0) {
 607                 OUT_RING(dev_priv->back_offset);
 608                 dev_priv->current_page = 1;
 609         } else {
 610                 OUT_RING(dev_priv->front_offset);
 611                 dev_priv->current_page = 0;
 612         }
 613         OUT_RING(0);
 614         ADVANCE_LP_RING();
 615
 616         BEGIN_LP_RING(2);
 617         OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 618         OUT_RING(0);
 619         ADVANCE_LP_RING();
 620
 621         master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 622
 623         BEGIN_LP_RING(4);
 624         OUT_RING(MI_STORE_DWORD_INDEX);
 625         OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 626         OUT_RING(dev_priv->counter);
 627         OUT_RING(0);
 628         ADVANCE_LP_RING();
 629
 630         master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 631         return 0;
 632 }
 633
 634 static int i915_quiescent(struct drm_device * dev)
 635 {
 636         drm_i915_private_t *dev_priv = dev->dev_private;
 637
 638         i915_kernel_lost_context(dev);
 639         return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
 640 }
 641
 642 static int i915_flush_ioctl(struct drm_device *dev, void *data,
 643                             struct drm_file *file_priv)
 644 {
 645         int ret;
 646
 647         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 648
 649         mutex_lock(&dev->struct_mutex);
 650         ret = i915_quiescent(dev);
 651         mutex_unlock(&dev->struct_mutex);
 652
 653         return ret;
 654 }
 655
 656 static int i915_batchbuffer(struct drm_device *dev, void *data,
 657                             struct drm_file *file_priv)
 658 {
 659         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 660         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 661         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 662             master_priv->sarea_priv;
 663         drm_i915_batchbuffer_t *batch = data;
 664         int ret;
 665         struct drm_clip_rect *cliprects = NULL;
 666
 667         if (!dev_priv->allow_batchbuffer) {
 668                 DRM_ERROR("Batchbuffer ioctl disabled\n");
 669                 return -EINVAL;
 670         }
 671
 672         DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 673                         batch->start, batch->used, batch->num_cliprects);
 674
 675         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 676
 677         if (batch->num_cliprects < 0)
 678                 return -EINVAL;
 679
 680         if (batch->num_cliprects) {
 681                 cliprects = kcalloc(batch->num_cliprects,
 682                                     sizeof(struct drm_clip_rect),
 683                                     GFP_KERNEL);
 684                 if (cliprects == NULL)
 685                         return -ENOMEM;
 686
 687                 ret = copy_from_user(cliprects, batch->cliprects,
 688                                      batch->num_cliprects *
 689                                      sizeof(struct drm_clip_rect));
 690                 if (ret != 0)
 691                         goto fail_free;
 692         }
 693
 694         mutex_lock(&dev->struct_mutex);
 695         ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 696         mutex_unlock(&dev->struct_mutex);
 697
 698         if (sarea_priv)
 699                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 700
 701 fail_free:
 702         kfree(cliprects);
 703
 704         return ret;
 705 }
 706
 707 static int i915_cmdbuffer(struct drm_device *dev, void *data,
 708                           struct drm_file *file_priv)
 709 {
 710         drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 711         struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 712         drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 713             master_priv->sarea_priv;
 714         drm_i915_cmdbuffer_t *cmdbuf = data;
 715         struct drm_clip_rect *cliprects = NULL;
 716         void *batch_data;
 717         int ret;
 718
 719         DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 720                         cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 721
 722         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 723
 724         if (cmdbuf->num_cliprects < 0)
 725                 return -EINVAL;
 726
 727         batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 728         if (batch_data == NULL)
 729                 return -ENOMEM;
 730
 731         ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 732         if (ret != 0)
 733                 goto fail_batch_free;
 734
 735         if (cmdbuf->num_cliprects) {
 736                 cliprects = kcalloc(cmdbuf->num_cliprects,
 737                                     sizeof(struct drm_clip_rect), GFP_KERNEL);
 738                 if (cliprects == NULL)
 739                         goto fail_batch_free;
 740
 741                 ret = copy_from_user(cliprects, cmdbuf->cliprects,
 742                                      cmdbuf->num_cliprects *
 743                                      sizeof(struct drm_clip_rect));
 744                 if (ret != 0)
 745                         goto fail_clip_free;
 746         }
 747
 748         mutex_lock(&dev->struct_mutex);
 749         ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 750         mutex_unlock(&dev->struct_mutex);
 751         if (ret) {
 752                 DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 753                 goto fail_clip_free;
 754         }
 755
 756         if (sarea_priv)
 757                 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 758
 759 fail_clip_free:
 760         kfree(cliprects);
 761 fail_batch_free:
 762         kfree(batch_data);
 763
 764         return ret;
 765 }
 766
 767 static int i915_flip_bufs(struct drm_device *dev, void *data,
 768                           struct drm_file *file_priv)
 769 {
 770         int ret;
 771
 772         DRM_DEBUG_DRIVER("%s\n", __func__);
 773
 774         RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 775
 776         mutex_lock(&dev->struct_mutex);
 777         ret = i915_dispatch_flip(dev);
 778         mutex_unlock(&dev->struct_mutex);
 779
 780         return ret;
 781 }
 782
 783 static int i915_getparam(struct drm_device *dev, void *data,
 784                          struct drm_file *file_priv)
 785 {
 786         drm_i915_private_t *dev_priv = dev->dev_private;
 787         drm_i915_getparam_t *param = data;
 788         int value;
 789
 790         if (!dev_priv) {
 791                 DRM_ERROR("called with no initialization\n");
 792                 return -EINVAL;
 793         }
 794
 795         switch (param->param) {
 796         case I915_PARAM_IRQ_ACTIVE:
 797                 value = dev->pdev->irq ? 1 : 0;
 798                 break;
 799         case I915_PARAM_ALLOW_BATCHBUFFER:
 800                 value = dev_priv->allow_batchbuffer ? 1 : 0;
 801                 break;
 802         case I915_PARAM_LAST_DISPATCH:
 803                 value = READ_BREADCRUMB(dev_priv);
 804                 break;
 805         case I915_PARAM_CHIPSET_ID:
 806                 value = dev->pci_device;
 807                 break;
 808         case I915_PARAM_HAS_GEM:
 809                 value = dev_priv->has_gem;
 810                 break;
 811         case I915_PARAM_NUM_FENCES_AVAIL:
 812                 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 813                 break;
 814         case I915_PARAM_HAS_OVERLAY:
 815                 value = dev_priv->overlay ? 1 : 0;
 816                 break;
 817         case I915_PARAM_HAS_PAGEFLIPPING:
 818                 value = 1;
 819                 break;
 820         case I915_PARAM_HAS_EXECBUF2:
 821                 /* depends on GEM */
 822                 value = dev_priv->has_gem;
 823                 break;
 824         default:
 825                 DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 826                                  param->param);
 827                 return -EINVAL;
 828         }
 829
 830         if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 831                 DRM_ERROR("DRM_COPY_TO_USER failed\n");
 832                 return -EFAULT;
 833         }
 834
 835         return 0;
 836 }
 837
 838 static int i915_setparam(struct drm_device *dev, void *data,
 839                          struct drm_file *file_priv)
 840 {
 841         drm_i915_private_t *dev_priv = dev->dev_private;
 842         drm_i915_setparam_t *param = data;
 843
 844         if (!dev_priv) {
 845                 DRM_ERROR("called with no initialization\n");
 846                 return -EINVAL;
 847         }
 848
 849         switch (param->param) {
 850         case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 851                 break;
 852         case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 853                 dev_priv->tex_lru_log_granularity = param->value;
 854                 break;
 855         case I915_SETPARAM_ALLOW_BATCHBUFFER:
 856                 dev_priv->allow_batchbuffer = param->value;
 857                 break;
 858         case I915_SETPARAM_NUM_USED_FENCES:
 859                 if (param->value > dev_priv->num_fence_regs ||
 860                     param->value < 0)
 861                         return -EINVAL;
 862                 /* Userspace can use first N regs */
 863                 dev_priv->fence_reg_start = param->value;
 864                 break;
 865         default:
 866                 DRM_DEBUG_DRIVER("unknown parameter %d\n",
 867                                         param->param);
 868                 return -EINVAL;
 869         }
 870
 871         return 0;
 872 }
 873
 874 static int i915_set_status_page(struct drm_device *dev, void *data,
 875                                 struct drm_file *file_priv)
 876 {
 877         drm_i915_private_t *dev_priv = dev->dev_private;
 878         drm_i915_hws_addr_t *hws = data;
 879
 880         if (!I915_NEED_GFX_HWS(dev))
 881                 return -EINVAL;
 882
 883         if (!dev_priv) {
 884                 DRM_ERROR("called with no initialization\n");
 885                 return -EINVAL;
 886         }
 887
 888         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 889                 WARN(1, "tried to set status page when mode setting active\n");
 890                 return 0;
 891         }
 892
 893         DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 894
 895         dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
 896
 897         dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 898         dev_priv->hws_map.size = 4*1024;
 899         dev_priv->hws_map.type = 0;
 900         dev_priv->hws_map.flags = 0;
 901         dev_priv->hws_map.mtrr = 0;
 902
 903         drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 904         if (dev_priv->hws_map.handle == NULL) {
 905                 i915_dma_cleanup(dev);
 906                 dev_priv->status_gfx_addr = 0;
 907                 DRM_ERROR("can not ioremap virtual address for"
 908                                 " G33 hw status page\n");
 909                 return -ENOMEM;
 910         }
 911         dev_priv->hw_status_page = dev_priv->hws_map.handle;
 912
 913         memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
 914         I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr);
 915         DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 916                                 dev_priv->status_gfx_addr);
 917         DRM_DEBUG_DRIVER("load hws at %p\n",
 918                                 dev_priv->hw_status_page);
 919         return 0;
 920 }
 921
 922 static int i915_get_bridge_dev(struct drm_device *dev)
 923 {
 924         struct drm_i915_private *dev_priv = dev->dev_private;
 925
 926         dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 927         if (!dev_priv->bridge_dev) {
 928                 DRM_ERROR("bridge device not found\n");
 929                 return -1;
 930         }
 931         return 0;
 932 }
 933
 934 /**
 935  * i915_probe_agp - get AGP bootup configuration
 936  * @pdev: PCI device
 937  * @aperture_size: returns AGP aperture configured size
 938  * @preallocated_size: returns size of BIOS preallocated AGP space
 939  *
 940  * Since Intel integrated graphics are UMA, the BIOS has to set aside
 941  * some RAM for the framebuffer at early boot.  This code figures out
 942  * how much was set aside so we can use it for our own purposes.
 943  */
 944 static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,
 945                           uint32_t *preallocated_size,
 946                           uint32_t *start)
 947 {
 948         struct drm_i915_private *dev_priv = dev->dev_private;
 949         u16 tmp = 0;
 950         unsigned long overhead;
 951         unsigned long stolen;
 952
 953         /* Get the fb aperture size and "stolen" memory amount. */
 954         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp);
 955
 956         *aperture_size = 1024 * 1024;
 957         *preallocated_size = 1024 * 1024;
 958
 959         switch (dev->pdev->device) {
 960         case PCI_DEVICE_ID_INTEL_82830_CGC:
 961         case PCI_DEVICE_ID_INTEL_82845G_IG:
 962         case PCI_DEVICE_ID_INTEL_82855GM_IG:
 963         case PCI_DEVICE_ID_INTEL_82865_IG:
 964                 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M)
 965                         *aperture_size *= 64;
 966                 else
 967                         *aperture_size *= 128;
 968                 break;
 969         default:
 970                 /* 9xx supports large sizes, just look at the length */
 971                 *aperture_size = pci_resource_len(dev->pdev, 2);
 972                 break;
 973         }
 974
 975         /*
 976          * Some of the preallocated space is taken by the GTT
 977          * and popup.  GTT is 1K per MB of aperture size, and popup is 4K.
 978          */
 979         if (IS_G4X(dev) || IS_PINEVIEW(dev) || IS_IRONLAKE(dev))
 980                 overhead = 4096;
 981         else
 982                 overhead = (*aperture_size / 1024) + 4096;
 983
 984         switch (tmp & INTEL_GMCH_GMS_MASK) {
 985         case INTEL_855_GMCH_GMS_DISABLED:
 986                 DRM_ERROR("video memory is disabled\n");
 987                 return -1;
 988         case INTEL_855_GMCH_GMS_STOLEN_1M:
 989                 stolen = 1 * 1024 * 1024;
 990                 break;
 991         case INTEL_855_GMCH_GMS_STOLEN_4M:
 992                 stolen = 4 * 1024 * 1024;
 993                 break;
 994         case INTEL_855_GMCH_GMS_STOLEN_8M:
 995                 stolen = 8 * 1024 * 1024;
 996                 break;
 997         case INTEL_855_GMCH_GMS_STOLEN_16M:
 998                 stolen = 16 * 1024 * 1024;
 999                 break;
1000         case INTEL_855_GMCH_GMS_STOLEN_32M:
1001                 stolen = 32 * 1024 * 1024;
1002                 break;
1003         case INTEL_915G_GMCH_GMS_STOLEN_48M:
1004                 stolen = 48 * 1024 * 1024;
1005                 break;
1006         case INTEL_915G_GMCH_GMS_STOLEN_64M:
1007                 stolen = 64 * 1024 * 1024;
1008                 break;
1009         case INTEL_GMCH_GMS_STOLEN_128M:
1010                 stolen = 128 * 1024 * 1024;
1011                 break;
1012         case INTEL_GMCH_GMS_STOLEN_256M:
1013                 stolen = 256 * 1024 * 1024;
1014                 break;
1015         case INTEL_GMCH_GMS_STOLEN_96M:
1016                 stolen = 96 * 1024 * 1024;
1017                 break;
1018         case INTEL_GMCH_GMS_STOLEN_160M:
1019                 stolen = 160 * 1024 * 1024;
1020                 break;
1021         case INTEL_GMCH_GMS_STOLEN_224M:
1022                 stolen = 224 * 1024 * 1024;
1023                 break;
1024         case INTEL_GMCH_GMS_STOLEN_352M:
1025                 stolen = 352 * 1024 * 1024;
1026                 break;
1027         default:
1028                 DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n",
1029                         tmp & INTEL_GMCH_GMS_MASK);
1030                 return -1;
1031         }
1032         *preallocated_size = stolen - overhead;
1033         *start = overhead;
1034
1035         return 0;
1036 }
1037
1038 #define PTE_ADDRESS_MASK                0xfffff000
1039 #define PTE_ADDRESS_MASK_HIGH           0x000000f0 /* i915+ */
1040 #define PTE_MAPPING_TYPE_UNCACHED       (0 << 1)
1041 #define PTE_MAPPING_TYPE_DCACHE         (1 << 1) /* i830 only */
1042 #define PTE_MAPPING_TYPE_CACHED         (3 << 1)
1043 #define PTE_MAPPING_TYPE_MASK           (3 << 1)
1044 #define PTE_VALID                       (1 << 0)
1045
1046 /**
1047  * i915_gtt_to_phys - take a GTT address and turn it into a physical one
1048  * @dev: drm device
1049  * @gtt_addr: address to translate
1050  *
1051  * Some chip functions require allocations from stolen space but need the
1052  * physical address of the memory in question.  We use this routine
1053  * to get a physical address suitable for register programming from a given
1054  * GTT address.
1055  */
1056 static unsigned long i915_gtt_to_phys(struct drm_device *dev,
1057                                       unsigned long gtt_addr)
1058 {
1059         unsigned long *gtt;
1060         unsigned long entry, phys;
1061         int gtt_bar = IS_I9XX(dev) ? 0 : 1;
1062         int gtt_offset, gtt_size;
1063
1064         if (IS_I965G(dev)) {
1065                 if (IS_G4X(dev) || IS_IRONLAKE(dev)) {
1066                         gtt_offset = 2*1024*1024;
1067                         gtt_size = 2*1024*1024;
1068                 } else {
1069                         gtt_offset = 512*1024;
1070                         gtt_size = 512*1024;
1071                 }
1072         } else {
1073                 gtt_bar = 3;
1074                 gtt_offset = 0;
1075                 gtt_size = pci_resource_len(dev->pdev, gtt_bar);
1076         }
1077
1078         gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
1079                          gtt_size);
1080         if (!gtt) {
1081                 DRM_ERROR("ioremap of GTT failed\n");
1082                 return 0;
1083         }
1084
1085         entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
1086
1087         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
1088
1089         /* Mask out these reserved bits on this hardware. */
1090         if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||
1091             IS_I945G(dev) || IS_I945GM(dev)) {
1092                 entry &= ~PTE_ADDRESS_MASK_HIGH;
1093         }
1094
1095         /* If it's not a mapping type we know, then bail. */
1096         if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
1097             (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
1098                 iounmap(gtt);
1099                 return 0;
1100         }
1101
1102         if (!(entry & PTE_VALID)) {
1103                 DRM_ERROR("bad GTT entry in stolen space\n");
1104                 iounmap(gtt);
1105                 return 0;
1106         }
1107
1108         iounmap(gtt);
1109
1110         phys =(entry & PTE_ADDRESS_MASK) |
1111                 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
1112
1113         DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
1114
1115         return phys;
1116 }
1117
1118 static void i915_warn_stolen(struct drm_device *dev)
1119 {
1120         DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1121         DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1122 }
1123
1124 static void i915_setup_compression(struct drm_device *dev, int size)
1125 {
1126         struct drm_i915_private *dev_priv = dev->dev_private;
1127         struct drm_mm_node *compressed_fb, *compressed_llb;
1128         unsigned long cfb_base;
1129         unsigned long ll_base = 0;
1130
1131         /* Leave 1M for line length buffer & misc. */
1132         compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);
1133         if (!compressed_fb) {
1134                 i915_warn_stolen(dev);
1135                 return;
1136         }
1137
1138         compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1139         if (!compressed_fb) {
1140                 i915_warn_stolen(dev);
1141                 return;
1142         }
1143
1144         cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
1145         if (!cfb_base) {
1146                 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1147                 drm_mm_put_block(compressed_fb);
1148         }
1149
1150         if (!IS_GM45(dev)) {
1151                 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096,
1152                                                     4096, 0);
1153                 if (!compressed_llb) {
1154                         i915_warn_stolen(dev);
1155                         return;
1156                 }
1157
1158                 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
1159                 if (!compressed_llb) {
1160                         i915_warn_stolen(dev);
1161                         return;
1162                 }
1163
1164                 ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
1165                 if (!ll_base) {
1166                         DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
1167                         drm_mm_put_block(compressed_fb);
1168                         drm_mm_put_block(compressed_llb);
1169                 }
1170         }
1171
1172         dev_priv->cfb_size = size;
1173
1174         if (IS_GM45(dev)) {
1175                 g4x_disable_fbc(dev);
1176                 I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1177         } else {
1178                 i8xx_disable_fbc(dev);
1179                 I915_WRITE(FBC_CFB_BASE, cfb_base);
1180                 I915_WRITE(FBC_LL_BASE, ll_base);
1181         }
1182
1183         DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
1184                   ll_base, size >> 20);
1185 }
1186
1187 /* true = enable decode, false = disable decoder */
1188 static unsigned int i915_vga_set_decode(void *cookie, bool state)
1189 {
1190         struct drm_device *dev = cookie;
1191
1192         intel_modeset_vga_set_state(dev, state);
1193         if (state)
1194                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1195                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1196         else
1197                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1198 }
1199
1200 static int i915_load_modeset_init(struct drm_device *dev,
1201                                   unsigned long prealloc_start,
1202                                   unsigned long prealloc_size,
1203                                   unsigned long agp_size)
1204 {
1205         struct drm_i915_private *dev_priv = dev->dev_private;
1206         int fb_bar = IS_I9XX(dev) ? 2 : 0;
1207         int ret = 0;
1208
1209         dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) &
1210                 0xff000000;
1211
1212         /* Basic memrange allocator for stolen space (aka vram) */
1213         drm_mm_init(&dev_priv->vram, 0, prealloc_size);
1214         DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));
1215
1216         /* We're off and running w/KMS */
1217         dev_priv->mm.suspended = 0;
1218
1219         /* Let GEM Manage from end of prealloc space to end of aperture.
1220          *
1221          * However, leave one page at the end still bound to the scratch page.
1222          * There are a number of places where the hardware apparently
1223          * prefetches past the end of the object, and we've seen multiple
1224          * hangs with the GPU head pointer stuck in a batchbuffer bound
1225          * at the last page of the aperture.  One page should be enough to
1226          * keep any prefetching inside of the aperture.
1227          */
1228         i915_gem_do_init(dev, prealloc_size, agp_size - 4096);
1229
1230         mutex_lock(&dev->struct_mutex);
1231         ret = i915_gem_init_ringbuffer(dev);
1232         mutex_unlock(&dev->struct_mutex);
1233         if (ret)
1234                 goto out;
1235
1236         /* Try to set up FBC with a reasonable compressed buffer size */
1237         if (I915_HAS_FBC(dev) && i915_powersave) {
1238                 int cfb_size;
1239
1240                 /* Try to get an 8M buffer... */
1241                 if (prealloc_size > (9*1024*1024))
1242                         cfb_size = 8*1024*1024;
1243                 else /* fall back to 7/8 of the stolen space */
1244                         cfb_size = prealloc_size * 7 / 8;
1245                 i915_setup_compression(dev, cfb_size);
1246         }
1247
1248         /* Allow hardware batchbuffers unless told otherwise.
1249          */
1250         dev_priv->allow_batchbuffer = 1;
1251
1252         ret = intel_init_bios(dev);
1253         if (ret)
1254                 DRM_INFO("failed to find VBIOS tables\n");
1255
1256         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
1257         ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1258         if (ret)
1259                 goto destroy_ringbuffer;
1260
1261         intel_modeset_init(dev);
1262
1263         ret = drm_irq_install(dev);
1264         if (ret)
1265                 goto destroy_ringbuffer;
1266
1267         /* Always safe in the mode setting case. */
1268         /* FIXME: do pre/post-mode set stuff in core KMS code */
1269         dev->vblank_disable_allowed = 1;
1270
1271         /*
1272          * Initialize the hardware status page IRQ location.
1273          */
1274
1275         I915_WRITE(INSTPM, (1 << 5) | (1 << 21));
1276
1277         drm_helper_initial_config(dev);
1278
1279         return 0;
1280
1281 destroy_ringbuffer:
1282         i915_gem_cleanup_ringbuffer(dev);
1283 out:
1284         return ret;
1285 }
1286
1287 int i915_master_create(struct drm_device *dev, struct drm_master *master)
1288 {
1289         struct drm_i915_master_private *master_priv;
1290
1291         master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1292         if (!master_priv)
1293                 return -ENOMEM;
1294
1295         master->driver_priv = master_priv;
1296         return 0;
1297 }
1298
1299 void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1300 {
1301         struct drm_i915_master_private *master_priv = master->driver_priv;
1302
1303         if (!master_priv)
1304                 return;
1305
1306         kfree(master_priv);
1307
1308         master->driver_priv = NULL;
1309 }
1310
1311 static void i915_get_mem_freq(struct drm_device *dev)
1312 {
1313         drm_i915_private_t *dev_priv = dev->dev_private;
1314         u32 tmp;
1315
1316         if (!IS_PINEVIEW(dev))
1317                 return;
1318
1319         tmp = I915_READ(CLKCFG);
1320
1321         switch (tmp & CLKCFG_FSB_MASK) {
1322         case CLKCFG_FSB_533:
1323                 dev_priv->fsb_freq = 533; /* 133*4 */
1324                 break;
1325         case CLKCFG_FSB_800:
1326                 dev_priv->fsb_freq = 800; /* 200*4 */
1327                 break;
1328         case CLKCFG_FSB_667:
1329                 dev_priv->fsb_freq =  667; /* 167*4 */
1330                 break;
1331         case CLKCFG_FSB_400:
1332                 dev_priv->fsb_freq = 400; /* 100*4 */
1333                 break;
1334         }
1335
1336         switch (tmp & CLKCFG_MEM_MASK) {
1337         case CLKCFG_MEM_533:
1338                 dev_priv->mem_freq = 533;
1339                 break;
1340         case CLKCFG_MEM_667:
1341                 dev_priv->mem_freq = 667;
1342                 break;
1343         case CLKCFG_MEM_800:
1344                 dev_priv->mem_freq = 800;
1345                 break;
1346         }
1347 }
1348
1349 /**
1350  * i915_driver_load - setup chip and create an initial config
1351  * @dev: DRM device
1352  * @flags: startup flags
1353  *
1354  * The driver load routine has to do several things:
1355  *   - drive output discovery via intel_modeset_init()
1356  *   - initialize the memory manager
1357  *   - allocate initial config memory
1358  *   - setup the DRM framebuffer with the allocated memory
1359  */
1360 int i915_driver_load(struct drm_device *dev, unsigned long flags)
1361 {
1362         struct drm_i915_private *dev_priv = dev->dev_private;
1363         resource_size_t base, size;
1364         int ret = 0, mmio_bar;
1365         uint32_t agp_size, prealloc_size, prealloc_start;
1366
1367         /* i915 has 4 more counters */
1368         dev->counters += 4;
1369         dev->types[6] = _DRM_STAT_IRQ;
1370         dev->types[7] = _DRM_STAT_PRIMARY;
1371         dev->types[8] = _DRM_STAT_SECONDARY;
1372         dev->types[9] = _DRM_STAT_DMA;
1373
1374         dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1375         if (dev_priv == NULL)
1376                 return -ENOMEM;
1377
1378         dev->dev_private = (void *)dev_priv;
1379         dev_priv->dev = dev;
1380         dev_priv->info = (struct intel_device_info *) flags;
1381
1382         /* Add register map (needed for suspend/resume) */
1383         mmio_bar = IS_I9XX(dev) ? 0 : 1;
1384         base = drm_get_resource_start(dev, mmio_bar);
1385         size = drm_get_resource_len(dev, mmio_bar);
1386
1387         if (i915_get_bridge_dev(dev)) {
1388                 ret = -EIO;
1389                 goto free_priv;
1390         }
1391
1392         dev_priv->regs = ioremap(base, size);
1393         if (!dev_priv->regs) {
1394                 DRM_ERROR("failed to map registers\n");
1395                 ret = -EIO;
1396                 goto put_bridge;
1397         }
1398
1399         dev_priv->mm.gtt_mapping =
1400                 io_mapping_create_wc(dev->agp->base,
1401                                      dev->agp->agp_info.aper_size * 1024*1024);
1402         if (dev_priv->mm.gtt_mapping == NULL) {
1403                 ret = -EIO;
1404                 goto out_rmmap;
1405         }
1406
1407         /* Set up a WC MTRR for non-PAT systems.  This is more common than
1408          * one would think, because the kernel disables PAT on first
1409          * generation Core chips because WC PAT gets overridden by a UC
1410          * MTRR if present.  Even if a UC MTRR isn't present.
1411          */
1412         dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1413                                          dev->agp->agp_info.aper_size *
1414                                          1024 * 1024,
1415                                          MTRR_TYPE_WRCOMB, 1);
1416         if (dev_priv->mm.gtt_mtrr < 0) {
1417                 DRM_INFO("MTRR allocation failed.  Graphics "
1418                          "performance may suffer.\n");
1419         }
1420
1421         ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);
1422         if (ret)
1423                 goto out_iomapfree;
1424
1425         dev_priv->wq = create_singlethread_workqueue("i915");
1426         if (dev_priv->wq == NULL) {
1427                 DRM_ERROR("Failed to create our workqueue.\n");
1428                 ret = -ENOMEM;
1429                 goto out_iomapfree;
1430         }
1431
1432         /* enable GEM by default */
1433         dev_priv->has_gem = 1;
1434
1435         if (prealloc_size > agp_size * 3 / 4) {
1436                 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
1437                           "memory stolen.\n",
1438                           prealloc_size / 1024, agp_size / 1024);
1439                 DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
1440                           "updating the BIOS to fix).\n");
1441                 dev_priv->has_gem = 0;
1442         }
1443
1444         dev->driver->get_vblank_counter = i915_get_vblank_counter;
1445         dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
1446         if (IS_G4X(dev) || IS_IRONLAKE(dev)) {
1447                 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
1448                 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
1449         }
1450
1451         i915_gem_load(dev);
1452
1453         /* Init HWS */
1454         if (!I915_NEED_GFX_HWS(dev)) {
1455                 ret = i915_init_phys_hws(dev);
1456                 if (ret != 0)
1457                         goto out_workqueue_free;
1458         }
1459
1460         i915_get_mem_freq(dev);
1461
1462         /* On the 945G/GM, the chipset reports the MSI capability on the
1463          * integrated graphics even though the support isn't actually there
1464          * according to the published specs.  It doesn't appear to function
1465          * correctly in testing on 945G.
1466          * This may be a side effect of MSI having been made available for PEG
1467          * and the registers being closely associated.
1468          *
1469          * According to chipset errata, on the 965GM, MSI interrupts may
1470          * be lost or delayed, but we use them anyways to avoid
1471          * stuck interrupts on some machines.
1472          */
1473         if (!IS_I945G(dev) && !IS_I945GM(dev))
1474                 pci_enable_msi(dev->pdev);
1475
1476         spin_lock_init(&dev_priv->user_irq_lock);
1477         spin_lock_init(&dev_priv->error_lock);
1478         dev_priv->user_irq_refcount = 0;
1479         dev_priv->trace_irq_seqno = 0;
1480
1481         ret = drm_vblank_init(dev, I915_NUM_PIPE);
1482
1483         if (ret) {
1484                 (void) i915_driver_unload(dev);
1485                 return ret;
1486         }
1487
1488         /* Start out suspended */
1489         dev_priv->mm.suspended = 1;
1490
1491         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1492                 ret = i915_load_modeset_init(dev, prealloc_start,
1493                                              prealloc_size, agp_size);
1494                 if (ret < 0) {
1495                         DRM_ERROR("failed to init modeset\n");
1496                         goto out_workqueue_free;
1497                 }
1498         }
1499
1500         /* Must be done after probing outputs */
1501         intel_opregion_init(dev, 0);
1502
1503         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
1504                     (unsigned long) dev);
1505         return 0;
1506
1507 out_workqueue_free:
1508         destroy_workqueue(dev_priv->wq);
1509 out_iomapfree:
1510         io_mapping_free(dev_priv->mm.gtt_mapping);
1511 out_rmmap:
1512         iounmap(dev_priv->regs);
1513 put_bridge:
1514         pci_dev_put(dev_priv->bridge_dev);
1515 free_priv:
1516         kfree(dev_priv);
1517         return ret;
1518 }
1519
1520 int i915_driver_unload(struct drm_device *dev)
1521 {
1522         struct drm_i915_private *dev_priv = dev->dev_private;
1523
1524         destroy_workqueue(dev_priv->wq);
1525         del_timer_sync(&dev_priv->hangcheck_timer);
1526
1527         io_mapping_free(dev_priv->mm.gtt_mapping);
1528         if (dev_priv->mm.gtt_mtrr >= 0) {
1529                 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
1530                          dev->agp->agp_info.aper_size * 1024 * 1024);
1531                 dev_priv->mm.gtt_mtrr = -1;
1532         }
1533
1534         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1535                 /*
1536                  * free the memory space allocated for the child device
1537                  * config parsed from VBT
1538                  */
1539                 if (dev_priv->child_dev && dev_priv->child_dev_num) {
1540                         kfree(dev_priv->child_dev);
1541                         dev_priv->child_dev = NULL;
1542                         dev_priv->child_dev_num = 0;
1543                 }
1544                 drm_irq_uninstall(dev);
1545                 vga_client_register(dev->pdev, NULL, NULL, NULL);
1546         }
1547
1548         if (dev->pdev->msi_enabled)
1549                 pci_disable_msi(dev->pdev);
1550
1551         if (dev_priv->regs != NULL)
1552                 iounmap(dev_priv->regs);
1553
1554         intel_opregion_free(dev, 0);
1555
1556         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
1557                 intel_modeset_cleanup(dev);
1558
1559                 i915_gem_free_all_phys_object(dev);
1560
1561                 mutex_lock(&dev->struct_mutex);
1562                 i915_gem_cleanup_ringbuffer(dev);
1563                 mutex_unlock(&dev->struct_mutex);
1564                 drm_mm_takedown(&dev_priv->vram);
1565                 i915_gem_lastclose(dev);
1566
1567                 intel_cleanup_overlay(dev);
1568         }
1569
1570         pci_dev_put(dev_priv->bridge_dev);
1571         kfree(dev->dev_private);
1572
1573         return 0;
1574 }
1575
1576 int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv)
1577 {
1578         struct drm_i915_file_private *i915_file_priv;
1579
1580         DRM_DEBUG_DRIVER("\n");
1581         i915_file_priv = (struct drm_i915_file_private *)
1582             kmalloc(sizeof(*i915_file_priv), GFP_KERNEL);
1583
1584         if (!i915_file_priv)
1585                 return -ENOMEM;
1586
1587         file_priv->driver_priv = i915_file_priv;
1588
1589         INIT_LIST_HEAD(&i915_file_priv->mm.request_list);
1590
1591         return 0;
1592 }
1593
1594 /**
1595  * i915_driver_lastclose - clean up after all DRM clients have exited
1596  * @dev: DRM device
1597  *
1598  * Take care of cleaning up after all DRM clients have exited.  In the
1599  * mode setting case, we want to restore the kernel's initial mode (just
1600  * in case the last client left us in a bad state).
1601  *
1602  * Additionally, in the non-mode setting case, we'll tear down the AGP
1603  * and DMA structures, since the kernel won't be using them, and clea
1604  * up any GEM state.
1605  */
1606 void i915_driver_lastclose(struct drm_device * dev)
1607 {
1608         drm_i915_private_t *dev_priv = dev->dev_private;
1609
1610         if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
1611                 drm_fb_helper_restore();
1612                 return;
1613         }
1614
1615         i915_gem_lastclose(dev);
1616
1617         if (dev_priv->agp_heap)
1618                 i915_mem_takedown(&(dev_priv->agp_heap));
1619
1620         i915_dma_cleanup(dev);
1621 }
1622
1623 void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
1624 {
1625         drm_i915_private_t *dev_priv = dev->dev_private;
1626         i915_gem_release(dev, file_priv);
1627         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1628                 i915_mem_release(dev, file_priv, dev_priv->agp_heap);
1629 }
1630
1631 void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv)
1632 {
1633         struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv;
1634
1635         kfree(i915_file_priv);
1636 }
1637
1638 struct drm_ioctl_desc i915_ioctls[] = {
1639         DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1640         DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
1641         DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
1642         DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
1643         DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
1644         DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
1645         DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
1646         DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1647         DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
1648         DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
1649         DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1650         DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
1651         DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1652         DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
1653         DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
1654         DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
1655         DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1656         DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1657         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH),
1658         DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH),
1659         DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1660         DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
1661         DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH),
1662         DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH),
1663         DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1664         DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
1665         DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0),
1666         DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0),
1667         DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0),
1668         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0),
1669         DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, 0),
1670         DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0),
1671         DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0),
1672         DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0),
1673         DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0),
1674         DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0),
1675         DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0),
1676         DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, 0),
1677         DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW),
1678         DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW),
1679 };
1680
1681 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
1682
1683 /**
1684  * Determine if the device really is AGP or not.
1685  *
1686  * All Intel graphics chipsets are treated as AGP, even if they are really
1687  * PCI-e.
1688  *
1689  * \param dev   The device to be tested.
1690  *
1691  * \returns
1692  * A value of 1 is always retured to indictate every i9x5 is AGP.
1693  */
1694 int i915_driver_device_is_agp(struct drm_device * dev)
1695 {
1696         return 1;
1697 }