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 "../../../platform/x86/intel_ips.h"
  38#include <linux/pci.h>
 
 
  39#include <linux/vgaarb.h>
  40#include <linux/acpi.h>
  41#include <linux/pnp.h>
  42#include <linux/vga_switcheroo.h>
  43#include <linux/slab.h>
  44#include <acpi/video.h>
 
 
 
  45
  46static void i915_write_hws_pga(struct drm_device *dev)
  47{
  48	drm_i915_private_t *dev_priv = dev->dev_private;
  49	u32 addr;
  50
  51	addr = dev_priv->status_page_dmah->busaddr;
  52	if (INTEL_INFO(dev)->gen >= 4)
  53		addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
  54	I915_WRITE(HWS_PGA, addr);
  55}
  56
  57/**
  58 * Sets up the hardware status page for devices that need a physical address
  59 * in the register.
  60 */
  61static int i915_init_phys_hws(struct drm_device *dev)
  62{
  63	drm_i915_private_t *dev_priv = dev->dev_private;
  64
  65	/* Program Hardware Status Page */
  66	dev_priv->status_page_dmah =
  67		drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE);
  68
  69	if (!dev_priv->status_page_dmah) {
  70		DRM_ERROR("Can not allocate hardware status page\n");
  71		return -ENOMEM;
  72	}
  73
  74	memset_io((void __force __iomem *)dev_priv->status_page_dmah->vaddr,
  75		  0, PAGE_SIZE);
  76
  77	i915_write_hws_pga(dev);
  78
  79	DRM_DEBUG_DRIVER("Enabled hardware status page\n");
  80	return 0;
  81}
  82
  83/**
  84 * Frees the hardware status page, whether it's a physical address or a virtual
  85 * address set up by the X Server.
  86 */
  87static void i915_free_hws(struct drm_device *dev)
  88{
  89	drm_i915_private_t *dev_priv = dev->dev_private;
  90	struct intel_ring_buffer *ring = LP_RING(dev_priv);
  91
  92	if (dev_priv->status_page_dmah) {
  93		drm_pci_free(dev, dev_priv->status_page_dmah);
  94		dev_priv->status_page_dmah = NULL;
  95	}
  96
  97	if (ring->status_page.gfx_addr) {
  98		ring->status_page.gfx_addr = 0;
  99		drm_core_ioremapfree(&dev_priv->hws_map, dev);
 100	}
 101
 102	/* Need to rewrite hardware status page */
 103	I915_WRITE(HWS_PGA, 0x1ffff000);
 104}
 105
 106void i915_kernel_lost_context(struct drm_device * dev)
 107{
 108	drm_i915_private_t *dev_priv = dev->dev_private;
 109	struct drm_i915_master_private *master_priv;
 110	struct intel_ring_buffer *ring = LP_RING(dev_priv);
 111
 112	/*
 113	 * We should never lose context on the ring with modesetting
 114	 * as we don't expose it to userspace
 115	 */
 116	if (drm_core_check_feature(dev, DRIVER_MODESET))
 117		return;
 118
 119	ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
 120	ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
 121	ring->space = ring->head - (ring->tail + 8);
 122	if (ring->space < 0)
 123		ring->space += ring->size;
 124
 125	if (!dev->primary->master)
 126		return;
 127
 128	master_priv = dev->primary->master->driver_priv;
 129	if (ring->head == ring->tail && master_priv->sarea_priv)
 130		master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
 131}
 132
 133static int i915_dma_cleanup(struct drm_device * dev)
 134{
 135	drm_i915_private_t *dev_priv = dev->dev_private;
 136	int i;
 137
 138	/* Make sure interrupts are disabled here because the uninstall ioctl
 139	 * may not have been called from userspace and after dev_private
 140	 * is freed, it's too late.
 141	 */
 142	if (dev->irq_enabled)
 143		drm_irq_uninstall(dev);
 144
 145	mutex_lock(&dev->struct_mutex);
 146	for (i = 0; i < I915_NUM_RINGS; i++)
 147		intel_cleanup_ring_buffer(&dev_priv->ring[i]);
 148	mutex_unlock(&dev->struct_mutex);
 149
 150	/* Clear the HWS virtual address at teardown */
 151	if (I915_NEED_GFX_HWS(dev))
 152		i915_free_hws(dev);
 153
 154	return 0;
 155}
 156
 157static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
 158{
 159	drm_i915_private_t *dev_priv = dev->dev_private;
 160	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 161	int ret;
 162
 163	master_priv->sarea = drm_getsarea(dev);
 164	if (master_priv->sarea) {
 165		master_priv->sarea_priv = (drm_i915_sarea_t *)
 166			((u8 *)master_priv->sarea->handle + init->sarea_priv_offset);
 167	} else {
 168		DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n");
 169	}
 170
 171	if (init->ring_size != 0) {
 172		if (LP_RING(dev_priv)->obj != NULL) {
 173			i915_dma_cleanup(dev);
 174			DRM_ERROR("Client tried to initialize ringbuffer in "
 175				  "GEM mode\n");
 176			return -EINVAL;
 177		}
 178
 179		ret = intel_render_ring_init_dri(dev,
 180						 init->ring_start,
 181						 init->ring_size);
 182		if (ret) {
 183			i915_dma_cleanup(dev);
 184			return ret;
 185		}
 186	}
 187
 188	dev_priv->cpp = init->cpp;
 189	dev_priv->back_offset = init->back_offset;
 190	dev_priv->front_offset = init->front_offset;
 191	dev_priv->current_page = 0;
 192	if (master_priv->sarea_priv)
 193		master_priv->sarea_priv->pf_current_page = 0;
 194
 195	/* Allow hardware batchbuffers unless told otherwise.
 196	 */
 197	dev_priv->allow_batchbuffer = 1;
 198
 199	return 0;
 200}
 201
 202static int i915_dma_resume(struct drm_device * dev)
 203{
 204	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 205	struct intel_ring_buffer *ring = LP_RING(dev_priv);
 206
 207	DRM_DEBUG_DRIVER("%s\n", __func__);
 208
 209	if (ring->map.handle == NULL) {
 210		DRM_ERROR("can not ioremap virtual address for"
 211			  " ring buffer\n");
 212		return -ENOMEM;
 213	}
 214
 215	/* Program Hardware Status Page */
 216	if (!ring->status_page.page_addr) {
 217		DRM_ERROR("Can not find hardware status page\n");
 218		return -EINVAL;
 219	}
 220	DRM_DEBUG_DRIVER("hw status page @ %p\n",
 221				ring->status_page.page_addr);
 222	if (ring->status_page.gfx_addr != 0)
 223		intel_ring_setup_status_page(ring);
 224	else
 225		i915_write_hws_pga(dev);
 226
 227	DRM_DEBUG_DRIVER("Enabled hardware status page\n");
 228
 229	return 0;
 230}
 231
 232static int i915_dma_init(struct drm_device *dev, void *data,
 233			 struct drm_file *file_priv)
 234{
 235	drm_i915_init_t *init = data;
 236	int retcode = 0;
 237
 238	switch (init->func) {
 239	case I915_INIT_DMA:
 240		retcode = i915_initialize(dev, init);
 241		break;
 242	case I915_CLEANUP_DMA:
 243		retcode = i915_dma_cleanup(dev);
 244		break;
 245	case I915_RESUME_DMA:
 246		retcode = i915_dma_resume(dev);
 247		break;
 248	default:
 249		retcode = -EINVAL;
 250		break;
 251	}
 252
 253	return retcode;
 254}
 255
 256/* Implement basically the same security restrictions as hardware does
 257 * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 258 *
 259 * Most of the calculations below involve calculating the size of a
 260 * particular instruction.  It's important to get the size right as
 261 * that tells us where the next instruction to check is.  Any illegal
 262 * instruction detected will be given a size of zero, which is a
 263 * signal to abort the rest of the buffer.
 264 */
 265static int validate_cmd(int cmd)
 266{
 267	switch (((cmd >> 29) & 0x7)) {
 268	case 0x0:
 269		switch ((cmd >> 23) & 0x3f) {
 270		case 0x0:
 271			return 1;	/* MI_NOOP */
 272		case 0x4:
 273			return 1;	/* MI_FLUSH */
 274		default:
 275			return 0;	/* disallow everything else */
 276		}
 277		break;
 278	case 0x1:
 279		return 0;	/* reserved */
 280	case 0x2:
 281		return (cmd & 0xff) + 2;	/* 2d commands */
 282	case 0x3:
 283		if (((cmd >> 24) & 0x1f) <= 0x18)
 284			return 1;
 285
 286		switch ((cmd >> 24) & 0x1f) {
 287		case 0x1c:
 288			return 1;
 289		case 0x1d:
 290			switch ((cmd >> 16) & 0xff) {
 291			case 0x3:
 292				return (cmd & 0x1f) + 2;
 293			case 0x4:
 294				return (cmd & 0xf) + 2;
 295			default:
 296				return (cmd & 0xffff) + 2;
 297			}
 298		case 0x1e:
 299			if (cmd & (1 << 23))
 300				return (cmd & 0xffff) + 1;
 301			else
 302				return 1;
 303		case 0x1f:
 304			if ((cmd & (1 << 23)) == 0)	/* inline vertices */
 305				return (cmd & 0x1ffff) + 2;
 306			else if (cmd & (1 << 17))	/* indirect random */
 307				if ((cmd & 0xffff) == 0)
 308					return 0;	/* unknown length, too hard */
 309				else
 310					return (((cmd & 0xffff) + 1) / 2) + 1;
 311			else
 312				return 2;	/* indirect sequential */
 313		default:
 314			return 0;
 315		}
 316	default:
 317		return 0;
 318	}
 319
 320	return 0;
 321}
 322
 323static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords)
 324{
 325	drm_i915_private_t *dev_priv = dev->dev_private;
 326	int i, ret;
 327
 328	if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->size - 8)
 329		return -EINVAL;
 330
 331	for (i = 0; i < dwords;) {
 332		int sz = validate_cmd(buffer[i]);
 333		if (sz == 0 || i + sz > dwords)
 334			return -EINVAL;
 335		i += sz;
 336	}
 337
 338	ret = BEGIN_LP_RING((dwords+1)&~1);
 339	if (ret)
 340		return ret;
 341
 342	for (i = 0; i < dwords; i++)
 343		OUT_RING(buffer[i]);
 344	if (dwords & 1)
 345		OUT_RING(0);
 346
 347	ADVANCE_LP_RING();
 348
 349	return 0;
 350}
 351
 352int
 353i915_emit_box(struct drm_device *dev,
 354	      struct drm_clip_rect *box,
 355	      int DR1, int DR4)
 356{
 357	struct drm_i915_private *dev_priv = dev->dev_private;
 358	int ret;
 359
 360	if (box->y2 <= box->y1 || box->x2 <= box->x1 ||
 361	    box->y2 <= 0 || box->x2 <= 0) {
 362		DRM_ERROR("Bad box %d,%d..%d,%d\n",
 363			  box->x1, box->y1, box->x2, box->y2);
 364		return -EINVAL;
 365	}
 366
 367	if (INTEL_INFO(dev)->gen >= 4) {
 368		ret = BEGIN_LP_RING(4);
 369		if (ret)
 370			return ret;
 371
 372		OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
 373		OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 374		OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 375		OUT_RING(DR4);
 376	} else {
 377		ret = BEGIN_LP_RING(6);
 378		if (ret)
 379			return ret;
 380
 381		OUT_RING(GFX_OP_DRAWRECT_INFO);
 382		OUT_RING(DR1);
 383		OUT_RING((box->x1 & 0xffff) | (box->y1 << 16));
 384		OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16));
 385		OUT_RING(DR4);
 386		OUT_RING(0);
 387	}
 388	ADVANCE_LP_RING();
 389
 390	return 0;
 391}
 392
 393/* XXX: Emitting the counter should really be moved to part of the IRQ
 394 * emit. For now, do it in both places:
 395 */
 396
 397static void i915_emit_breadcrumb(struct drm_device *dev)
 398{
 399	drm_i915_private_t *dev_priv = dev->dev_private;
 400	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 401
 402	dev_priv->counter++;
 403	if (dev_priv->counter > 0x7FFFFFFFUL)
 404		dev_priv->counter = 0;
 405	if (master_priv->sarea_priv)
 406		master_priv->sarea_priv->last_enqueue = dev_priv->counter;
 407
 408	if (BEGIN_LP_RING(4) == 0) {
 409		OUT_RING(MI_STORE_DWORD_INDEX);
 410		OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 411		OUT_RING(dev_priv->counter);
 412		OUT_RING(0);
 413		ADVANCE_LP_RING();
 414	}
 415}
 416
 417static int i915_dispatch_cmdbuffer(struct drm_device * dev,
 418				   drm_i915_cmdbuffer_t *cmd,
 419				   struct drm_clip_rect *cliprects,
 420				   void *cmdbuf)
 421{
 422	int nbox = cmd->num_cliprects;
 423	int i = 0, count, ret;
 424
 425	if (cmd->sz & 0x3) {
 426		DRM_ERROR("alignment");
 427		return -EINVAL;
 428	}
 429
 430	i915_kernel_lost_context(dev);
 431
 432	count = nbox ? nbox : 1;
 433
 434	for (i = 0; i < count; i++) {
 435		if (i < nbox) {
 436			ret = i915_emit_box(dev, &cliprects[i],
 437					    cmd->DR1, cmd->DR4);
 438			if (ret)
 439				return ret;
 440		}
 441
 442		ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4);
 443		if (ret)
 444			return ret;
 445	}
 446
 447	i915_emit_breadcrumb(dev);
 448	return 0;
 449}
 450
 451static int i915_dispatch_batchbuffer(struct drm_device * dev,
 452				     drm_i915_batchbuffer_t * batch,
 453				     struct drm_clip_rect *cliprects)
 454{
 455	struct drm_i915_private *dev_priv = dev->dev_private;
 456	int nbox = batch->num_cliprects;
 457	int i, count, ret;
 458
 459	if ((batch->start | batch->used) & 0x7) {
 460		DRM_ERROR("alignment");
 461		return -EINVAL;
 462	}
 463
 464	i915_kernel_lost_context(dev);
 465
 466	count = nbox ? nbox : 1;
 467	for (i = 0; i < count; i++) {
 468		if (i < nbox) {
 469			ret = i915_emit_box(dev, &cliprects[i],
 470					    batch->DR1, batch->DR4);
 471			if (ret)
 472				return ret;
 473		}
 474
 475		if (!IS_I830(dev) && !IS_845G(dev)) {
 476			ret = BEGIN_LP_RING(2);
 477			if (ret)
 478				return ret;
 479
 480			if (INTEL_INFO(dev)->gen >= 4) {
 481				OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
 482				OUT_RING(batch->start);
 483			} else {
 484				OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
 485				OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 486			}
 487		} else {
 488			ret = BEGIN_LP_RING(4);
 489			if (ret)
 490				return ret;
 491
 492			OUT_RING(MI_BATCH_BUFFER);
 493			OUT_RING(batch->start | MI_BATCH_NON_SECURE);
 494			OUT_RING(batch->start + batch->used - 4);
 495			OUT_RING(0);
 496		}
 497		ADVANCE_LP_RING();
 498	}
 499
 500
 501	if (IS_G4X(dev) || IS_GEN5(dev)) {
 502		if (BEGIN_LP_RING(2) == 0) {
 503			OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP);
 504			OUT_RING(MI_NOOP);
 505			ADVANCE_LP_RING();
 506		}
 507	}
 508
 509	i915_emit_breadcrumb(dev);
 510	return 0;
 511}
 512
 513static int i915_dispatch_flip(struct drm_device * dev)
 514{
 515	drm_i915_private_t *dev_priv = dev->dev_private;
 516	struct drm_i915_master_private *master_priv =
 517		dev->primary->master->driver_priv;
 518	int ret;
 519
 520	if (!master_priv->sarea_priv)
 521		return -EINVAL;
 522
 523	DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n",
 524			  __func__,
 525			 dev_priv->current_page,
 526			 master_priv->sarea_priv->pf_current_page);
 527
 528	i915_kernel_lost_context(dev);
 529
 530	ret = BEGIN_LP_RING(10);
 531	if (ret)
 532		return ret;
 533
 534	OUT_RING(MI_FLUSH | MI_READ_FLUSH);
 535	OUT_RING(0);
 536
 537	OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
 538	OUT_RING(0);
 539	if (dev_priv->current_page == 0) {
 540		OUT_RING(dev_priv->back_offset);
 541		dev_priv->current_page = 1;
 542	} else {
 543		OUT_RING(dev_priv->front_offset);
 544		dev_priv->current_page = 0;
 545	}
 546	OUT_RING(0);
 547
 548	OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
 549	OUT_RING(0);
 550
 551	ADVANCE_LP_RING();
 552
 553	master_priv->sarea_priv->last_enqueue = dev_priv->counter++;
 554
 555	if (BEGIN_LP_RING(4) == 0) {
 556		OUT_RING(MI_STORE_DWORD_INDEX);
 557		OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
 558		OUT_RING(dev_priv->counter);
 559		OUT_RING(0);
 560		ADVANCE_LP_RING();
 561	}
 562
 563	master_priv->sarea_priv->pf_current_page = dev_priv->current_page;
 564	return 0;
 565}
 566
 567static int i915_quiescent(struct drm_device *dev)
 568{
 569	struct intel_ring_buffer *ring = LP_RING(dev->dev_private);
 570
 571	i915_kernel_lost_context(dev);
 572	return intel_wait_ring_idle(ring);
 573}
 574
 575static int i915_flush_ioctl(struct drm_device *dev, void *data,
 576			    struct drm_file *file_priv)
 577{
 578	int ret;
 579
 580	RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 581
 582	mutex_lock(&dev->struct_mutex);
 583	ret = i915_quiescent(dev);
 584	mutex_unlock(&dev->struct_mutex);
 585
 586	return ret;
 587}
 588
 589static int i915_batchbuffer(struct drm_device *dev, void *data,
 590			    struct drm_file *file_priv)
 591{
 592	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 593	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 594	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 595	    master_priv->sarea_priv;
 596	drm_i915_batchbuffer_t *batch = data;
 597	int ret;
 598	struct drm_clip_rect *cliprects = NULL;
 599
 600	if (!dev_priv->allow_batchbuffer) {
 601		DRM_ERROR("Batchbuffer ioctl disabled\n");
 602		return -EINVAL;
 603	}
 604
 605	DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n",
 606			batch->start, batch->used, batch->num_cliprects);
 607
 608	RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 609
 610	if (batch->num_cliprects < 0)
 611		return -EINVAL;
 612
 613	if (batch->num_cliprects) {
 614		cliprects = kcalloc(batch->num_cliprects,
 615				    sizeof(struct drm_clip_rect),
 616				    GFP_KERNEL);
 617		if (cliprects == NULL)
 618			return -ENOMEM;
 619
 620		ret = copy_from_user(cliprects, batch->cliprects,
 621				     batch->num_cliprects *
 622				     sizeof(struct drm_clip_rect));
 623		if (ret != 0) {
 624			ret = -EFAULT;
 625			goto fail_free;
 626		}
 627	}
 628
 629	mutex_lock(&dev->struct_mutex);
 630	ret = i915_dispatch_batchbuffer(dev, batch, cliprects);
 631	mutex_unlock(&dev->struct_mutex);
 632
 633	if (sarea_priv)
 634		sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 635
 636fail_free:
 637	kfree(cliprects);
 638
 639	return ret;
 640}
 641
 642static int i915_cmdbuffer(struct drm_device *dev, void *data,
 643			  struct drm_file *file_priv)
 644{
 645	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 646	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
 647	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
 648	    master_priv->sarea_priv;
 649	drm_i915_cmdbuffer_t *cmdbuf = data;
 650	struct drm_clip_rect *cliprects = NULL;
 651	void *batch_data;
 652	int ret;
 653
 654	DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
 655			cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
 656
 657	RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 658
 659	if (cmdbuf->num_cliprects < 0)
 660		return -EINVAL;
 661
 662	batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL);
 663	if (batch_data == NULL)
 664		return -ENOMEM;
 665
 666	ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz);
 667	if (ret != 0) {
 668		ret = -EFAULT;
 669		goto fail_batch_free;
 670	}
 671
 672	if (cmdbuf->num_cliprects) {
 673		cliprects = kcalloc(cmdbuf->num_cliprects,
 674				    sizeof(struct drm_clip_rect), GFP_KERNEL);
 675		if (cliprects == NULL) {
 676			ret = -ENOMEM;
 677			goto fail_batch_free;
 678		}
 679
 680		ret = copy_from_user(cliprects, cmdbuf->cliprects,
 681				     cmdbuf->num_cliprects *
 682				     sizeof(struct drm_clip_rect));
 683		if (ret != 0) {
 684			ret = -EFAULT;
 685			goto fail_clip_free;
 686		}
 687	}
 688
 689	mutex_lock(&dev->struct_mutex);
 690	ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data);
 691	mutex_unlock(&dev->struct_mutex);
 692	if (ret) {
 693		DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
 694		goto fail_clip_free;
 695	}
 696
 697	if (sarea_priv)
 698		sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
 699
 700fail_clip_free:
 701	kfree(cliprects);
 702fail_batch_free:
 703	kfree(batch_data);
 704
 705	return ret;
 706}
 707
 708static int i915_flip_bufs(struct drm_device *dev, void *data,
 709			  struct drm_file *file_priv)
 710{
 711	int ret;
 712
 713	DRM_DEBUG_DRIVER("%s\n", __func__);
 714
 715	RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
 716
 717	mutex_lock(&dev->struct_mutex);
 718	ret = i915_dispatch_flip(dev);
 719	mutex_unlock(&dev->struct_mutex);
 720
 721	return ret;
 722}
 723
 724static int i915_getparam(struct drm_device *dev, void *data,
 725			 struct drm_file *file_priv)
 726{
 727	drm_i915_private_t *dev_priv = dev->dev_private;
 728	drm_i915_getparam_t *param = data;
 729	int value;
 730
 731	if (!dev_priv) {
 732		DRM_ERROR("called with no initialization\n");
 733		return -EINVAL;
 734	}
 735
 736	switch (param->param) {
 737	case I915_PARAM_IRQ_ACTIVE:
 738		value = dev->pdev->irq ? 1 : 0;
 739		break;
 740	case I915_PARAM_ALLOW_BATCHBUFFER:
 741		value = dev_priv->allow_batchbuffer ? 1 : 0;
 742		break;
 743	case I915_PARAM_LAST_DISPATCH:
 744		value = READ_BREADCRUMB(dev_priv);
 745		break;
 746	case I915_PARAM_CHIPSET_ID:
 747		value = dev->pci_device;
 
 
 
 748		break;
 749	case I915_PARAM_HAS_GEM:
 750		value = dev_priv->has_gem;
 751		break;
 752	case I915_PARAM_NUM_FENCES_AVAIL:
 753		value = dev_priv->num_fence_regs - dev_priv->fence_reg_start;
 754		break;
 755	case I915_PARAM_HAS_OVERLAY:
 756		value = dev_priv->overlay ? 1 : 0;
 757		break;
 758	case I915_PARAM_HAS_PAGEFLIPPING:
 759		value = 1;
 760		break;
 761	case I915_PARAM_HAS_EXECBUF2:
 762		/* depends on GEM */
 763		value = dev_priv->has_gem;
 764		break;
 765	case I915_PARAM_HAS_BSD:
 766		value = HAS_BSD(dev);
 767		break;
 768	case I915_PARAM_HAS_BLT:
 769		value = HAS_BLT(dev);
 
 
 
 
 
 
 770		break;
 771	case I915_PARAM_HAS_RELAXED_FENCING:
 772		value = 1;
 773		break;
 774	case I915_PARAM_HAS_COHERENT_RINGS:
 775		value = 1;
 776		break;
 777	case I915_PARAM_HAS_EXEC_CONSTANTS:
 778		value = INTEL_INFO(dev)->gen >= 4;
 779		break;
 780	case I915_PARAM_HAS_RELAXED_DELTA:
 781		value = 1;
 782		break;
 783	default:
 784		DRM_DEBUG_DRIVER("Unknown parameter %d\n",
 785				 param->param);
 786		return -EINVAL;
 787	}
 788
 789	if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
 790		DRM_ERROR("DRM_COPY_TO_USER failed\n");
 791		return -EFAULT;
 792	}
 793
 794	return 0;
 795}
 796
 797static int i915_setparam(struct drm_device *dev, void *data,
 798			 struct drm_file *file_priv)
 799{
 800	drm_i915_private_t *dev_priv = dev->dev_private;
 801	drm_i915_setparam_t *param = data;
 802
 803	if (!dev_priv) {
 804		DRM_ERROR("called with no initialization\n");
 805		return -EINVAL;
 806	}
 807
 808	switch (param->param) {
 809	case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
 810		break;
 811	case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
 812		dev_priv->tex_lru_log_granularity = param->value;
 813		break;
 814	case I915_SETPARAM_ALLOW_BATCHBUFFER:
 815		dev_priv->allow_batchbuffer = param->value;
 816		break;
 817	case I915_SETPARAM_NUM_USED_FENCES:
 818		if (param->value > dev_priv->num_fence_regs ||
 819		    param->value < 0)
 820			return -EINVAL;
 821		/* Userspace can use first N regs */
 822		dev_priv->fence_reg_start = param->value;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 823		break;
 824	default:
 825		DRM_DEBUG_DRIVER("unknown parameter %d\n",
 826					param->param);
 827		return -EINVAL;
 828	}
 829
 830	return 0;
 831}
 832
 833static int i915_set_status_page(struct drm_device *dev, void *data,
 834				struct drm_file *file_priv)
 835{
 836	drm_i915_private_t *dev_priv = dev->dev_private;
 837	drm_i915_hws_addr_t *hws = data;
 838	struct intel_ring_buffer *ring = LP_RING(dev_priv);
 839
 840	if (!I915_NEED_GFX_HWS(dev))
 841		return -EINVAL;
 842
 843	if (!dev_priv) {
 844		DRM_ERROR("called with no initialization\n");
 845		return -EINVAL;
 846	}
 847
 848	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 849		WARN(1, "tried to set status page when mode setting active\n");
 850		return 0;
 851	}
 852
 853	DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
 854
 855	ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
 856
 857	dev_priv->hws_map.offset = dev->agp->base + hws->addr;
 858	dev_priv->hws_map.size = 4*1024;
 859	dev_priv->hws_map.type = 0;
 860	dev_priv->hws_map.flags = 0;
 861	dev_priv->hws_map.mtrr = 0;
 862
 863	drm_core_ioremap_wc(&dev_priv->hws_map, dev);
 864	if (dev_priv->hws_map.handle == NULL) {
 865		i915_dma_cleanup(dev);
 866		ring->status_page.gfx_addr = 0;
 867		DRM_ERROR("can not ioremap virtual address for"
 868				" G33 hw status page\n");
 869		return -ENOMEM;
 870	}
 871	ring->status_page.page_addr =
 872		(void __force __iomem *)dev_priv->hws_map.handle;
 873	memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
 874	I915_WRITE(HWS_PGA, ring->status_page.gfx_addr);
 875
 876	DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n",
 877			 ring->status_page.gfx_addr);
 878	DRM_DEBUG_DRIVER("load hws at %p\n",
 879			 ring->status_page.page_addr);
 880	return 0;
 881}
 882
 883static int i915_get_bridge_dev(struct drm_device *dev)
 884{
 885	struct drm_i915_private *dev_priv = dev->dev_private;
 886
 887	dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
 888	if (!dev_priv->bridge_dev) {
 889		DRM_ERROR("bridge device not found\n");
 890		return -1;
 891	}
 892	return 0;
 893}
 894
 895#define MCHBAR_I915 0x44
 896#define MCHBAR_I965 0x48
 897#define MCHBAR_SIZE (4*4096)
 898
 899#define DEVEN_REG 0x54
 900#define   DEVEN_MCHBAR_EN (1 << 28)
 901
 902/* Allocate space for the MCH regs if needed, return nonzero on error */
 903static int
 904intel_alloc_mchbar_resource(struct drm_device *dev)
 905{
 906	drm_i915_private_t *dev_priv = dev->dev_private;
 907	int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 908	u32 temp_lo, temp_hi = 0;
 909	u64 mchbar_addr;
 910	int ret;
 911
 912	if (INTEL_INFO(dev)->gen >= 4)
 913		pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
 914	pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
 915	mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
 916
 917	/* If ACPI doesn't have it, assume we need to allocate it ourselves */
 918#ifdef CONFIG_PNP
 919	if (mchbar_addr &&
 920	    pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
 921		return 0;
 922#endif
 923
 924	/* Get some space for it */
 925	dev_priv->mch_res.name = "i915 MCHBAR";
 926	dev_priv->mch_res.flags = IORESOURCE_MEM;
 927	ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
 928				     &dev_priv->mch_res,
 929				     MCHBAR_SIZE, MCHBAR_SIZE,
 930				     PCIBIOS_MIN_MEM,
 931				     0, pcibios_align_resource,
 932				     dev_priv->bridge_dev);
 933	if (ret) {
 934		DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
 935		dev_priv->mch_res.start = 0;
 936		return ret;
 937	}
 938
 939	if (INTEL_INFO(dev)->gen >= 4)
 940		pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
 941				       upper_32_bits(dev_priv->mch_res.start));
 942
 943	pci_write_config_dword(dev_priv->bridge_dev, reg,
 944			       lower_32_bits(dev_priv->mch_res.start));
 945	return 0;
 946}
 947
 948/* Setup MCHBAR if possible, return true if we should disable it again */
 949static void
 950intel_setup_mchbar(struct drm_device *dev)
 951{
 952	drm_i915_private_t *dev_priv = dev->dev_private;
 953	int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 954	u32 temp;
 955	bool enabled;
 956
 
 
 
 957	dev_priv->mchbar_need_disable = false;
 958
 959	if (IS_I915G(dev) || IS_I915GM(dev)) {
 960		pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 961		enabled = !!(temp & DEVEN_MCHBAR_EN);
 962	} else {
 963		pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 964		enabled = temp & 1;
 965	}
 966
 967	/* If it's already enabled, don't have to do anything */
 968	if (enabled)
 969		return;
 970
 971	if (intel_alloc_mchbar_resource(dev))
 972		return;
 973
 974	dev_priv->mchbar_need_disable = true;
 975
 976	/* Space is allocated or reserved, so enable it. */
 977	if (IS_I915G(dev) || IS_I915GM(dev)) {
 978		pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG,
 979				       temp | DEVEN_MCHBAR_EN);
 980	} else {
 981		pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
 982		pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
 983	}
 984}
 985
 986static void
 987intel_teardown_mchbar(struct drm_device *dev)
 988{
 989	drm_i915_private_t *dev_priv = dev->dev_private;
 990	int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915;
 991	u32 temp;
 992
 993	if (dev_priv->mchbar_need_disable) {
 994		if (IS_I915G(dev) || IS_I915GM(dev)) {
 995			pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp);
 996			temp &= ~DEVEN_MCHBAR_EN;
 997			pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp);
 998		} else {
 999			pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
1000			temp &= ~1;
1001			pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp);
1002		}
1003	}
1004
1005	if (dev_priv->mch_res.start)
1006		release_resource(&dev_priv->mch_res);
1007}
1008
1009#define PTE_ADDRESS_MASK		0xfffff000
1010#define PTE_ADDRESS_MASK_HIGH		0x000000f0 /* i915+ */
1011#define PTE_MAPPING_TYPE_UNCACHED	(0 << 1)
1012#define PTE_MAPPING_TYPE_DCACHE		(1 << 1) /* i830 only */
1013#define PTE_MAPPING_TYPE_CACHED		(3 << 1)
1014#define PTE_MAPPING_TYPE_MASK		(3 << 1)
1015#define PTE_VALID			(1 << 0)
1016
1017/**
1018 * i915_stolen_to_phys - take an offset into stolen memory and turn it into
1019 *                       a physical one
1020 * @dev: drm device
1021 * @offset: address to translate
1022 *
1023 * Some chip functions require allocations from stolen space and need the
1024 * physical address of the memory in question.
1025 */
1026static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
1027{
1028	struct drm_i915_private *dev_priv = dev->dev_private;
1029	struct pci_dev *pdev = dev_priv->bridge_dev;
1030	u32 base;
1031
1032#if 0
1033	/* On the machines I have tested the Graphics Base of Stolen Memory
1034	 * is unreliable, so compute the base by subtracting the stolen memory
1035	 * from the Top of Low Usable DRAM which is where the BIOS places
1036	 * the graphics stolen memory.
1037	 */
1038	if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1039		/* top 32bits are reserved = 0 */
1040		pci_read_config_dword(pdev, 0xA4, &base);
1041	} else {
1042		/* XXX presume 8xx is the same as i915 */
1043		pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
1044	}
1045#else
1046	if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
1047		u16 val;
1048		pci_read_config_word(pdev, 0xb0, &val);
1049		base = val >> 4 << 20;
1050	} else {
1051		u8 val;
1052		pci_read_config_byte(pdev, 0x9c, &val);
1053		base = val >> 3 << 27;
1054	}
1055	base -= dev_priv->mm.gtt->stolen_size;
1056#endif
1057
1058	return base + offset;
1059}
1060
1061static void i915_warn_stolen(struct drm_device *dev)
1062{
1063	DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");
1064	DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");
1065}
1066
1067static void i915_setup_compression(struct drm_device *dev, int size)
1068{
1069	struct drm_i915_private *dev_priv = dev->dev_private;
1070	struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb);
1071	unsigned long cfb_base;
1072	unsigned long ll_base = 0;
1073
1074	/* Just in case the BIOS is doing something questionable. */
1075	intel_disable_fbc(dev);
1076
1077	compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
1078	if (compressed_fb)
1079		compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
1080	if (!compressed_fb)
1081		goto err;
1082
1083	cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
1084	if (!cfb_base)
1085		goto err_fb;
1086
1087	if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) {
1088		compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
1089						    4096, 4096, 0);
1090		if (compressed_llb)
1091			compressed_llb = drm_mm_get_block(compressed_llb,
1092							  4096, 4096);
1093		if (!compressed_llb)
1094			goto err_fb;
1095
1096		ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
1097		if (!ll_base)
1098			goto err_llb;
1099	}
1100
1101	dev_priv->cfb_size = size;
1102
1103	dev_priv->compressed_fb = compressed_fb;
1104	if (HAS_PCH_SPLIT(dev))
1105		I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);
1106	else if (IS_GM45(dev)) {
1107		I915_WRITE(DPFC_CB_BASE, compressed_fb->start);
1108	} else {
1109		I915_WRITE(FBC_CFB_BASE, cfb_base);
1110		I915_WRITE(FBC_LL_BASE, ll_base);
1111		dev_priv->compressed_llb = compressed_llb;
1112	}
1113
1114	DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
1115		      cfb_base, ll_base, size >> 20);
1116	return;
1117
1118err_llb:
1119	drm_mm_put_block(compressed_llb);
1120err_fb:
1121	drm_mm_put_block(compressed_fb);
1122err:
1123	dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
1124	i915_warn_stolen(dev);
1125}
1126
1127static void i915_cleanup_compression(struct drm_device *dev)
1128{
1129	struct drm_i915_private *dev_priv = dev->dev_private;
1130
1131	drm_mm_put_block(dev_priv->compressed_fb);
1132	if (dev_priv->compressed_llb)
1133		drm_mm_put_block(dev_priv->compressed_llb);
1134}
1135
1136/* true = enable decode, false = disable decoder */
1137static unsigned int i915_vga_set_decode(void *cookie, bool state)
1138{
1139	struct drm_device *dev = cookie;
1140
1141	intel_modeset_vga_set_state(dev, state);
1142	if (state)
1143		return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
1144		       VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1145	else
1146		return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
1147}
1148
1149static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
1150{
1151	struct drm_device *dev = pci_get_drvdata(pdev);
1152	pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 
1153	if (state == VGA_SWITCHEROO_ON) {
1154		printk(KERN_INFO "i915: switched on\n");
1155		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1156		/* i915 resume handler doesn't set to D0 */
1157		pci_set_power_state(dev->pdev, PCI_D0);
1158		i915_resume(dev);
1159		dev->switch_power_state = DRM_SWITCH_POWER_ON;
1160	} else {
1161		printk(KERN_ERR "i915: switched off\n");
1162		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
1163		i915_suspend(dev, pmm);
1164		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
1165	}
1166}
1167
1168static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
1169{
1170	struct drm_device *dev = pci_get_drvdata(pdev);
1171	bool can_switch;
1172
1173	spin_lock(&dev->count_lock);
1174	can_switch = (dev->open_count == 0);
1175	spin_unlock(&dev->count_lock);
1176	return can_switch;
1177}
1178
1179static int i915_load_gem_init(struct drm_device *dev)
1180{
1181	struct drm_i915_private *dev_priv = dev->dev_private;
1182	unsigned long prealloc_size, gtt_size, mappable_size;
1183	int ret;
1184
1185	prealloc_size = dev_priv->mm.gtt->stolen_size;
1186	gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
1187	mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1188
1189	/* Basic memrange allocator for stolen space */
1190	drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
1191
1192	/* Let GEM Manage all of the aperture.
1193	 *
1194	 * However, leave one page at the end still bound to the scratch page.
1195	 * There are a number of places where the hardware apparently
1196	 * prefetches past the end of the object, and we've seen multiple
1197	 * hangs with the GPU head pointer stuck in a batchbuffer bound
1198	 * at the last page of the aperture.  One page should be enough to
1199	 * keep any prefetching inside of the aperture.
1200	 */
1201	i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
1202
1203	mutex_lock(&dev->struct_mutex);
1204	ret = i915_gem_init_ringbuffer(dev);
1205	mutex_unlock(&dev->struct_mutex);
1206	if (ret)
1207		return ret;
1208
1209	/* Try to set up FBC with a reasonable compressed buffer size */
1210	if (I915_HAS_FBC(dev) && i915_powersave) {
1211		int cfb_size;
1212
1213		/* Leave 1M for line length buffer & misc. */
1214
1215		/* Try to get a 32M buffer... */
1216		if (prealloc_size > (36*1024*1024))
1217			cfb_size = 32*1024*1024;
1218		else /* fall back to 7/8 of the stolen space */
1219			cfb_size = prealloc_size * 7 / 8;
1220		i915_setup_compression(dev, cfb_size);
1221	}
1222
1223	/* Allow hardware batchbuffers unless told otherwise. */
1224	dev_priv->allow_batchbuffer = 1;
1225	return 0;
1226}
1227
 
 
 
 
 
 
1228static int i915_load_modeset_init(struct drm_device *dev)
1229{
1230	struct drm_i915_private *dev_priv = dev->dev_private;
1231	int ret;
1232
1233	ret = intel_parse_bios(dev);
1234	if (ret)
1235		DRM_INFO("failed to find VBIOS tables\n");
1236
1237	/* If we have > 1 VGA cards, then we need to arbitrate access
1238	 * to the common VGA resources.
1239	 *
1240	 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
1241	 * then we do not take part in VGA arbitration and the
1242	 * vga_client_register() fails with -ENODEV.
1243	 */
1244	ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode);
1245	if (ret && ret != -ENODEV)
1246		goto out;
1247
1248	intel_register_dsm_handler();
1249
1250	ret = vga_switcheroo_register_client(dev->pdev,
1251					     i915_switcheroo_set_state,
1252					     NULL,
1253					     i915_switcheroo_can_switch);
1254	if (ret)
1255		goto cleanup_vga_client;
1256
1257	/* IIR "flip pending" bit means done if this bit is set */
1258	if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE))
1259		dev_priv->flip_pending_is_done = true;
1260
1261	intel_modeset_init(dev);
1262
1263	ret = i915_load_gem_init(dev);
1264	if (ret)
1265		goto cleanup_vga_switcheroo;
1266
1267	intel_modeset_gem_init(dev);
 
 
 
 
1268
1269	ret = drm_irq_install(dev);
 
 
1270	if (ret)
1271		goto cleanup_gem;
 
 
1272
1273	/* Always safe in the mode setting case. */
1274	/* FIXME: do pre/post-mode set stuff in core KMS code */
1275	dev->vblank_disable_allowed = 1;
 
 
1276
1277	ret = intel_fbdev_init(dev);
1278	if (ret)
1279		goto cleanup_irq;
1280
1281	drm_kms_helper_poll_init(dev);
 
1282
1283	/* We're off and running w/KMS */
1284	dev_priv->mm.suspended = 0;
 
 
 
 
 
 
 
 
 
 
 
1285
1286	return 0;
1287
1288cleanup_irq:
1289	drm_irq_uninstall(dev);
1290cleanup_gem:
1291	mutex_lock(&dev->struct_mutex);
1292	i915_gem_cleanup_ringbuffer(dev);
 
1293	mutex_unlock(&dev->struct_mutex);
1294cleanup_vga_switcheroo:
 
 
 
 
 
1295	vga_switcheroo_unregister_client(dev->pdev);
1296cleanup_vga_client:
1297	vga_client_register(dev->pdev, NULL, NULL, NULL);
1298out:
1299	return ret;
1300}
1301
1302int i915_master_create(struct drm_device *dev, struct drm_master *master)
 
1303{
1304	struct drm_i915_master_private *master_priv;
 
 
 
1305
1306	master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL);
1307	if (!master_priv)
1308		return -ENOMEM;
1309
1310	master->driver_priv = master_priv;
1311	return 0;
1312}
1313
1314void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
1315{
1316	struct drm_i915_master_private *master_priv = master->driver_priv;
1317
1318	if (!master_priv)
1319		return;
1320
1321	kfree(master_priv);
1322
1323	master->driver_priv = NULL;
 
 
 
 
 
1324}
 
1325
1326static void i915_pineview_get_mem_freq(struct drm_device *dev)
 
 
 
 
 
 
1327{
1328	drm_i915_private_t *dev_priv = dev->dev_private;
1329	u32 tmp;
 
 
 
 
1330
1331	tmp = I915_READ(CLKCFG);
1332
1333	switch (tmp & CLKCFG_FSB_MASK) {
1334	case CLKCFG_FSB_533:
1335		dev_priv->fsb_freq = 533; /* 133*4 */
1336		break;
1337	case CLKCFG_FSB_800:
1338		dev_priv->fsb_freq = 800; /* 200*4 */
1339		break;
1340	case CLKCFG_FSB_667:
1341		dev_priv->fsb_freq =  667; /* 167*4 */
1342		break;
1343	case CLKCFG_FSB_400:
1344		dev_priv->fsb_freq = 400; /* 100*4 */
1345		break;
1346	}
1347
1348	switch (tmp & CLKCFG_MEM_MASK) {
1349	case CLKCFG_MEM_533:
1350		dev_priv->mem_freq = 533;
1351		break;
1352	case CLKCFG_MEM_667:
1353		dev_priv->mem_freq = 667;
1354		break;
1355	case CLKCFG_MEM_800:
1356		dev_priv->mem_freq = 800;
1357		break;
1358	}
 
1359
1360	/* detect pineview DDR3 setting */
1361	tmp = I915_READ(CSHRDDR3CTL);
1362	dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
1363}
 
1364
1365static void i915_ironlake_get_mem_freq(struct drm_device *dev)
1366{
1367	drm_i915_private_t *dev_priv = dev->dev_private;
1368	u16 ddrpll, csipll;
1369
1370	ddrpll = I915_READ16(DDRMPLL1);
1371	csipll = I915_READ16(CSIPLL0);
1372
1373	switch (ddrpll & 0xff) {
1374	case 0xc:
1375		dev_priv->mem_freq = 800;
1376		break;
1377	case 0x10:
1378		dev_priv->mem_freq = 1066;
1379		break;
1380	case 0x14:
1381		dev_priv->mem_freq = 1333;
1382		break;
1383	case 0x18:
1384		dev_priv->mem_freq = 1600;
1385		break;
1386	default:
1387		DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
1388				 ddrpll & 0xff);
1389		dev_priv->mem_freq = 0;
1390		break;
1391	}
1392
1393	dev_priv->r_t = dev_priv->mem_freq;
1394
1395	switch (csipll & 0x3ff) {
1396	case 0x00c:
1397		dev_priv->fsb_freq = 3200;
1398		break;
1399	case 0x00e:
1400		dev_priv->fsb_freq = 3733;
1401		break;
1402	case 0x010:
1403		dev_priv->fsb_freq = 4266;
1404		break;
1405	case 0x012:
1406		dev_priv->fsb_freq = 4800;
1407		break;
1408	case 0x014:
1409		dev_priv->fsb_freq = 5333;
1410		break;
1411	case 0x016:
1412		dev_priv->fsb_freq = 5866;
1413		break;
1414	case 0x018:
1415		dev_priv->fsb_freq = 6400;
1416		break;
1417	default:
1418		DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
1419				 csipll & 0x3ff);
1420		dev_priv->fsb_freq = 0;
1421		break;
1422	}
1423
1424	if (dev_priv->fsb_freq == 3200) {
1425		dev_priv->c_m = 0;
1426	} else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
1427		dev_priv->c_m = 1;
1428	} else {
1429		dev_priv->c_m = 2;
1430	}
1431}
1432
1433static const struct cparams {
1434	u16 i;
1435	u16 t;
1436	u16 m;
1437	u16 c;
1438} cparams[] = {
1439	{ 1, 1333, 301, 28664 },
1440	{ 1, 1066, 294, 24460 },
1441	{ 1, 800, 294, 25192 },
1442	{ 0, 1333, 276, 27605 },
1443	{ 0, 1066, 276, 27605 },
1444	{ 0, 800, 231, 23784 },
1445};
1446
1447unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
1448{
1449	u64 total_count, diff, ret;
1450	u32 count1, count2, count3, m = 0, c = 0;
1451	unsigned long now = jiffies_to_msecs(jiffies), diff1;
1452	int i;
1453
1454	diff1 = now - dev_priv->last_time1;
1455
1456	count1 = I915_READ(DMIEC);
1457	count2 = I915_READ(DDREC);
1458	count3 = I915_READ(CSIEC);
1459
1460	total_count = count1 + count2 + count3;
1461
1462	/* FIXME: handle per-counter overflow */
1463	if (total_count < dev_priv->last_count1) {
1464		diff = ~0UL - dev_priv->last_count1;
1465		diff += total_count;
1466	} else {
1467		diff = total_count - dev_priv->last_count1;
1468	}
1469
1470	for (i = 0; i < ARRAY_SIZE(cparams); i++) {
1471		if (cparams[i].i == dev_priv->c_m &&
1472		    cparams[i].t == dev_priv->r_t) {
1473			m = cparams[i].m;
1474			c = cparams[i].c;
1475			break;
1476		}
1477	}
1478
1479	diff = div_u64(diff, diff1);
1480	ret = ((m * diff) + c);
1481	ret = div_u64(ret, 10);
1482
1483	dev_priv->last_count1 = total_count;
1484	dev_priv->last_time1 = now;
1485
1486	return ret;
1487}
1488
1489unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
1490{
1491	unsigned long m, x, b;
1492	u32 tsfs;
1493
1494	tsfs = I915_READ(TSFS);
1495
1496	m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
1497	x = I915_READ8(TR1);
1498
1499	b = tsfs & TSFS_INTR_MASK;
1500
1501	return ((m * x) / 127) - b;
1502}
1503
1504static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
1505{
1506	static const struct v_table {
1507		u16 vd; /* in .1 mil */
1508		u16 vm; /* in .1 mil */
1509	} v_table[] = {
1510		{ 0, 0, },
1511		{ 375, 0, },
1512		{ 500, 0, },
1513		{ 625, 0, },
1514		{ 750, 0, },
1515		{ 875, 0, },
1516		{ 1000, 0, },
1517		{ 1125, 0, },
1518		{ 4125, 3000, },
1519		{ 4125, 3000, },
1520		{ 4125, 3000, },
1521		{ 4125, 3000, },
1522		{ 4125, 3000, },
1523		{ 4125, 3000, },
1524		{ 4125, 3000, },
1525		{ 4125, 3000, },
1526		{ 4125, 3000, },
1527		{ 4125, 3000, },
1528		{ 4125, 3000, },
1529		{ 4125, 3000, },
1530		{ 4125, 3000, },
1531		{ 4125, 3000, },
1532		{ 4125, 3000, },
1533		{ 4125, 3000, },
1534		{ 4125, 3000, },
1535		{ 4125, 3000, },
1536		{ 4125, 3000, },
1537		{ 4125, 3000, },
1538		{ 4125, 3000, },
1539		{ 4125, 3000, },
1540		{ 4125, 3000, },
1541		{ 4125, 3000, },
1542		{ 4250, 3125, },
1543		{ 4375, 3250, },
1544		{ 4500, 3375, },
1545		{ 4625, 3500, },
1546		{ 4750, 3625, },
1547		{ 4875, 3750, },
1548		{ 5000, 3875, },
1549		{ 5125, 4000, },
1550		{ 5250, 4125, },
1551		{ 5375, 4250, },
1552		{ 5500, 4375, },
1553		{ 5625, 4500, },
1554		{ 5750, 4625, },
1555		{ 5875, 4750, },
1556		{ 6000, 4875, },
1557		{ 6125, 5000, },
1558		{ 6250, 5125, },
1559		{ 6375, 5250, },
1560		{ 6500, 5375, },
1561		{ 6625, 5500, },
1562		{ 6750, 5625, },
1563		{ 6875, 5750, },
1564		{ 7000, 5875, },
1565		{ 7125, 6000, },
1566		{ 7250, 6125, },
1567		{ 7375, 6250, },
1568		{ 7500, 6375, },
1569		{ 7625, 6500, },
1570		{ 7750, 6625, },
1571		{ 7875, 6750, },
1572		{ 8000, 6875, },
1573		{ 8125, 7000, },
1574		{ 8250, 7125, },
1575		{ 8375, 7250, },
1576		{ 8500, 7375, },
1577		{ 8625, 7500, },
1578		{ 8750, 7625, },
1579		{ 8875, 7750, },
1580		{ 9000, 7875, },
1581		{ 9125, 8000, },
1582		{ 9250, 8125, },
1583		{ 9375, 8250, },
1584		{ 9500, 8375, },
1585		{ 9625, 8500, },
1586		{ 9750, 8625, },
1587		{ 9875, 8750, },
1588		{ 10000, 8875, },
1589		{ 10125, 9000, },
1590		{ 10250, 9125, },
1591		{ 10375, 9250, },
1592		{ 10500, 9375, },
1593		{ 10625, 9500, },
1594		{ 10750, 9625, },
1595		{ 10875, 9750, },
1596		{ 11000, 9875, },
1597		{ 11125, 10000, },
1598		{ 11250, 10125, },
1599		{ 11375, 10250, },
1600		{ 11500, 10375, },
1601		{ 11625, 10500, },
1602		{ 11750, 10625, },
1603		{ 11875, 10750, },
1604		{ 12000, 10875, },
1605		{ 12125, 11000, },
1606		{ 12250, 11125, },
1607		{ 12375, 11250, },
1608		{ 12500, 11375, },
1609		{ 12625, 11500, },
1610		{ 12750, 11625, },
1611		{ 12875, 11750, },
1612		{ 13000, 11875, },
1613		{ 13125, 12000, },
1614		{ 13250, 12125, },
1615		{ 13375, 12250, },
1616		{ 13500, 12375, },
1617		{ 13625, 12500, },
1618		{ 13750, 12625, },
1619		{ 13875, 12750, },
1620		{ 14000, 12875, },
1621		{ 14125, 13000, },
1622		{ 14250, 13125, },
1623		{ 14375, 13250, },
1624		{ 14500, 13375, },
1625		{ 14625, 13500, },
1626		{ 14750, 13625, },
1627		{ 14875, 13750, },
1628		{ 15000, 13875, },
1629		{ 15125, 14000, },
1630		{ 15250, 14125, },
1631		{ 15375, 14250, },
1632		{ 15500, 14375, },
1633		{ 15625, 14500, },
1634		{ 15750, 14625, },
1635		{ 15875, 14750, },
1636		{ 16000, 14875, },
1637		{ 16125, 15000, },
1638	};
1639	if (dev_priv->info->is_mobile)
1640		return v_table[pxvid].vm;
1641	else
1642		return v_table[pxvid].vd;
1643}
1644
1645void i915_update_gfx_val(struct drm_i915_private *dev_priv)
1646{
1647	struct timespec now, diff1;
1648	u64 diff;
1649	unsigned long diffms;
1650	u32 count;
1651
1652	getrawmonotonic(&now);
1653	diff1 = timespec_sub(now, dev_priv->last_time2);
 
 
 
 
 
 
1654
1655	/* Don't divide by 0 */
1656	diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
1657	if (!diffms)
1658		return;
 
 
 
 
1659
1660	count = I915_READ(GFXEC);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1661
1662	if (count < dev_priv->last_count2) {
1663		diff = ~0UL - dev_priv->last_count2;
1664		diff += count;
1665	} else {
1666		diff = count - dev_priv->last_count2;
1667	}
1668
1669	dev_priv->last_count2 = count;
1670	dev_priv->last_time2 = now;
1671
1672	/* More magic constants... */
1673	diff = diff * 1181;
1674	diff = div_u64(diff, diffms * 10);
1675	dev_priv->gfx_power = diff;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1676}
1677
1678unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
1679{
1680	unsigned long t, corr, state1, corr2, state2;
1681	u32 pxvid, ext_v;
1682
1683	pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->cur_delay * 4));
1684	pxvid = (pxvid >> 24) & 0x7f;
1685	ext_v = pvid_to_extvid(dev_priv, pxvid);
1686
1687	state1 = ext_v;
 
 
 
 
 
 
 
 
 
1688
1689	t = i915_mch_val(dev_priv);
1690
1691	/* Revel in the empirically derived constants */
 
1692
1693	/* Correction factor in 1/100000 units */
1694	if (t > 80)
1695		corr = ((t * 2349) + 135940);
1696	else if (t >= 50)
1697		corr = ((t * 964) + 29317);
1698	else /* < 50 */
1699		corr = ((t * 301) + 1004);
1700
1701	corr = corr * ((150142 * state1) / 10000 - 78642);
1702	corr /= 100000;
1703	corr2 = (corr * dev_priv->corr);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1704
1705	state2 = (corr2 * state1) / 10000;
1706	state2 /= 100; /* convert to mW */
 
1707
1708	i915_update_gfx_val(dev_priv);
 
 
 
 
 
 
1709
1710	return dev_priv->gfx_power + state2;
 
 
 
 
 
 
1711}
1712
1713/* Global for IPS driver to get at the current i915 device */
1714static struct drm_i915_private *i915_mch_dev;
1715/*
1716 * Lock protecting IPS related data structures
1717 *   - i915_mch_dev
1718 *   - dev_priv->max_delay
1719 *   - dev_priv->min_delay
1720 *   - dev_priv->fmax
1721 *   - dev_priv->gpu_busy
1722 */
1723static DEFINE_SPINLOCK(mchdev_lock);
1724
1725/**
1726 * i915_read_mch_val - return value for IPS use
1727 *
1728 * Calculate and return a value for the IPS driver to use when deciding whether
1729 * we have thermal and power headroom to increase CPU or GPU power budget.
 
 
 
 
 
 
 
1730 */
1731unsigned long i915_read_mch_val(void)
1732{
1733  	struct drm_i915_private *dev_priv;
1734	unsigned long chipset_val, graphics_val, ret = 0;
 
1735
1736  	spin_lock(&mchdev_lock);
1737	if (!i915_mch_dev)
1738		goto out_unlock;
1739	dev_priv = i915_mch_dev;
1740
1741	chipset_val = i915_chipset_val(dev_priv);
1742	graphics_val = i915_gfx_val(dev_priv);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1743
1744	ret = chipset_val + graphics_val;
 
 
 
 
 
 
 
1745
1746out_unlock:
1747  	spin_unlock(&mchdev_lock);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1748
1749  	return ret;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1750}
1751EXPORT_SYMBOL_GPL(i915_read_mch_val);
1752
1753/**
1754 * i915_gpu_raise - raise GPU frequency limit
1755 *
1756 * Raise the limit; IPS indicates we have thermal headroom.
1757 */
1758bool i915_gpu_raise(void)
1759{
1760  	struct drm_i915_private *dev_priv;
1761	bool ret = true;
1762
1763  	spin_lock(&mchdev_lock);
1764	if (!i915_mch_dev) {
1765		ret = false;
1766		goto out_unlock;
 
 
 
1767	}
1768	dev_priv = i915_mch_dev;
1769
1770	if (dev_priv->max_delay > dev_priv->fmax)
1771		dev_priv->max_delay--;
1772
1773out_unlock:
1774  	spin_unlock(&mchdev_lock);
1775
1776  	return ret;
1777}
1778EXPORT_SYMBOL_GPL(i915_gpu_raise);
1779
1780/**
1781 * i915_gpu_lower - lower GPU frequency limit
1782 *
1783 * IPS indicates we're close to a thermal limit, so throttle back the GPU
1784 * frequency maximum.
1785 */
1786bool i915_gpu_lower(void)
1787{
1788  	struct drm_i915_private *dev_priv;
1789	bool ret = true;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1790
1791  	spin_lock(&mchdev_lock);
1792	if (!i915_mch_dev) {
1793		ret = false;
1794		goto out_unlock;
1795	}
1796	dev_priv = i915_mch_dev;
1797
1798	if (dev_priv->max_delay < dev_priv->min_delay)
1799		dev_priv->max_delay++;
 
 
1800
1801out_unlock:
1802  	spin_unlock(&mchdev_lock);
 
 
 
 
 
 
1803
1804  	return ret;
1805}
1806EXPORT_SYMBOL_GPL(i915_gpu_lower);
1807
1808/**
1809 * i915_gpu_busy - indicate GPU business to IPS
1810 *
1811 * Tell the IPS driver whether or not the GPU is busy.
1812 */
1813bool i915_gpu_busy(void)
1814{
1815  	struct drm_i915_private *dev_priv;
1816	bool ret = false;
1817
1818  	spin_lock(&mchdev_lock);
1819	if (!i915_mch_dev)
1820		goto out_unlock;
1821	dev_priv = i915_mch_dev;
1822
1823	ret = dev_priv->busy;
1824
1825out_unlock:
1826  	spin_unlock(&mchdev_lock);
1827
1828  	return ret;
1829}
1830EXPORT_SYMBOL_GPL(i915_gpu_busy);
1831
1832/**
1833 * i915_gpu_turbo_disable - disable graphics turbo
1834 *
1835 * Disable graphics turbo by resetting the max frequency and setting the
1836 * current frequency to the default.
1837 */
1838bool i915_gpu_turbo_disable(void)
1839{
1840  	struct drm_i915_private *dev_priv;
1841	bool ret = true;
 
1842
1843  	spin_lock(&mchdev_lock);
1844	if (!i915_mch_dev) {
1845		ret = false;
1846		goto out_unlock;
1847	}
1848	dev_priv = i915_mch_dev;
1849
1850	dev_priv->max_delay = dev_priv->fstart;
 
 
 
 
 
 
 
 
1851
1852	if (!ironlake_set_drps(dev_priv->dev, dev_priv->fstart))
1853		ret = false;
1854
1855out_unlock:
1856  	spin_unlock(&mchdev_lock);
1857
1858  	return ret;
1859}
1860EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
1861
1862/**
1863 * Tells the intel_ips driver that the i915 driver is now loaded, if
1864 * IPS got loaded first.
1865 *
1866 * This awkward dance is so that neither module has to depend on the
1867 * other in order for IPS to do the appropriate communication of
1868 * GPU turbo limits to i915.
1869 */
1870static void
1871ips_ping_for_i915_load(void)
1872{
1873	void (*link)(void);
1874
1875	link = symbol_get(ips_link_to_i915_driver);
1876	if (link) {
1877		link();
1878		symbol_put(ips_link_to_i915_driver);
1879	}
1880}
1881
1882/**
1883 * i915_driver_load - setup chip and create an initial config
1884 * @dev: DRM device
1885 * @flags: startup flags
1886 *
1887 * The driver load routine has to do several things:
1888 *   - drive output discovery via intel_modeset_init()
1889 *   - initialize the memory manager
1890 *   - allocate initial config memory
1891 *   - setup the DRM framebuffer with the allocated memory
1892 */
1893int i915_driver_load(struct drm_device *dev, unsigned long flags)
1894{
1895	struct drm_i915_private *dev_priv;
1896	int ret = 0, mmio_bar;
1897	uint32_t agp_size;
 
1898
1899	/* i915 has 4 more counters */
1900	dev->counters += 4;
1901	dev->types[6] = _DRM_STAT_IRQ;
1902	dev->types[7] = _DRM_STAT_PRIMARY;
1903	dev->types[8] = _DRM_STAT_SECONDARY;
1904	dev->types[9] = _DRM_STAT_DMA;
1905
1906	dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL);
1907	if (dev_priv == NULL)
1908		return -ENOMEM;
1909
1910	dev->dev_private = (void *)dev_priv;
1911	dev_priv->dev = dev;
1912	dev_priv->info = (struct intel_device_info *) flags;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1913
1914	if (i915_get_bridge_dev(dev)) {
1915		ret = -EIO;
1916		goto free_priv;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1917	}
1918
 
 
1919	/* overlay on gen2 is broken and can't address above 1G */
1920	if (IS_GEN2(dev))
1921		dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30));
1922
1923	/* 965GM sometimes incorrectly writes to hardware status page (HWS)
1924	 * using 32bit addressing, overwriting memory if HWS is located
1925	 * above 4GB.
1926	 *
1927	 * The documentation also mentions an issue with undefined
1928	 * behaviour if any general state is accessed within a page above 4GB,
1929	 * which also needs to be handled carefully.
1930	 */
1931	if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1932		dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32));
1933
1934	mmio_bar = IS_GEN2(dev) ? 1 : 0;
1935	dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0);
1936	if (!dev_priv->regs) {
1937		DRM_ERROR("failed to map registers\n");
1938		ret = -EIO;
1939		goto put_bridge;
1940	}
1941
1942	dev_priv->mm.gtt = intel_gtt_get();
1943	if (!dev_priv->mm.gtt) {
1944		DRM_ERROR("Failed to initialize GTT\n");
1945		ret = -ENODEV;
1946		goto out_rmmap;
1947	}
1948
1949	agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
1950
1951        dev_priv->mm.gtt_mapping =
1952		io_mapping_create_wc(dev->agp->base, agp_size);
1953	if (dev_priv->mm.gtt_mapping == NULL) {
1954		ret = -EIO;
1955		goto out_rmmap;
1956	}
1957
1958	/* Set up a WC MTRR for non-PAT systems.  This is more common than
1959	 * one would think, because the kernel disables PAT on first
1960	 * generation Core chips because WC PAT gets overridden by a UC
1961	 * MTRR if present.  Even if a UC MTRR isn't present.
1962	 */
1963	dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base,
1964					 agp_size,
1965					 MTRR_TYPE_WRCOMB, 1);
1966	if (dev_priv->mm.gtt_mtrr < 0) {
1967		DRM_INFO("MTRR allocation failed.  Graphics "
1968			 "performance may suffer.\n");
1969	}
1970
1971	/* The i915 workqueue is primarily used for batched retirement of
1972	 * requests (and thus managing bo) once the task has been completed
1973	 * by the GPU. i915_gem_retire_requests() is called directly when we
1974	 * need high-priority retirement, such as waiting for an explicit
1975	 * bo.
1976	 *
1977	 * It is also used for periodic low-priority events, such as
1978	 * idle-timers and recording error state.
1979	 *
1980	 * All tasks on the workqueue are expected to acquire the dev mutex
1981	 * so there is no point in running more than one instance of the
1982	 * workqueue at any time: max_active = 1 and NON_REENTRANT.
1983	 */
1984	dev_priv->wq = alloc_workqueue("i915",
1985				       WQ_UNBOUND | WQ_NON_REENTRANT,
1986				       1);
1987	if (dev_priv->wq == NULL) {
1988		DRM_ERROR("Failed to create our workqueue.\n");
1989		ret = -ENOMEM;
1990		goto out_mtrrfree;
1991	}
1992
1993	/* enable GEM by default */
1994	dev_priv->has_gem = 1;
1995
1996	intel_irq_init(dev);
 
1997
1998	/* Try to make sure MCHBAR is enabled before poking at it */
1999	intel_setup_mchbar(dev);
2000	intel_setup_gmbus(dev);
2001	intel_opregion_setup(dev);
2002
2003	/* Make sure the bios did its job and set up vital registers */
2004	intel_setup_bios(dev);
2005
2006	i915_gem_load(dev);
2007
2008	/* Init HWS */
2009	if (!I915_NEED_GFX_HWS(dev)) {
2010		ret = i915_init_phys_hws(dev);
2011		if (ret)
2012			goto out_gem_unload;
2013	}
2014
2015	if (IS_PINEVIEW(dev))
2016		i915_pineview_get_mem_freq(dev);
2017	else if (IS_GEN5(dev))
2018		i915_ironlake_get_mem_freq(dev);
2019
2020	/* On the 945G/GM, the chipset reports the MSI capability on the
2021	 * integrated graphics even though the support isn't actually there
2022	 * according to the published specs.  It doesn't appear to function
2023	 * correctly in testing on 945G.
2024	 * This may be a side effect of MSI having been made available for PEG
2025	 * and the registers being closely associated.
2026	 *
2027	 * According to chipset errata, on the 965GM, MSI interrupts may
2028	 * be lost or delayed, but we use them anyways to avoid
2029	 * stuck interrupts on some machines.
2030	 */
2031	if (!IS_I945G(dev) && !IS_I945GM(dev))
2032		pci_enable_msi(dev->pdev);
 
 
2033
2034	spin_lock_init(&dev_priv->irq_lock);
2035	spin_lock_init(&dev_priv->error_lock);
2036	spin_lock_init(&dev_priv->rps_lock);
2037
2038	if (IS_MOBILE(dev) || !IS_GEN2(dev))
2039		dev_priv->num_pipe = 2;
2040	else
2041		dev_priv->num_pipe = 1;
2042
2043	ret = drm_vblank_init(dev, dev_priv->num_pipe);
2044	if (ret)
2045		goto out_gem_unload;
 
 
2046
2047	/* Start out suspended */
2048	dev_priv->mm.suspended = 1;
2049
2050	intel_detect_pch(dev);
 
 
 
 
2051
2052	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2053		ret = i915_load_modeset_init(dev);
2054		if (ret < 0) {
2055			DRM_ERROR("failed to init modeset\n");
2056			goto out_gem_unload;
2057		}
 
 
 
 
 
 
 
2058	}
2059
2060	/* Must be done after probing outputs */
2061	intel_opregion_init(dev);
2062	acpi_video_register();
2063
2064	setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
2065		    (unsigned long) dev);
2066
2067	spin_lock(&mchdev_lock);
2068	i915_mch_dev = dev_priv;
2069	dev_priv->mchdev_lock = &mchdev_lock;
2070	spin_unlock(&mchdev_lock);
2071
2072	ips_ping_for_i915_load();
2073
2074	return 0;
2075
 
 
 
2076out_gem_unload:
2077	if (dev_priv->mm.inactive_shrinker.shrink)
2078		unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2079
2080	if (dev->pdev->msi_enabled)
2081		pci_disable_msi(dev->pdev);
2082
2083	intel_teardown_gmbus(dev);
2084	intel_teardown_mchbar(dev);
2085	destroy_workqueue(dev_priv->wq);
2086out_mtrrfree:
2087	if (dev_priv->mm.gtt_mtrr >= 0) {
2088		mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2089			 dev->agp->agp_info.aper_size * 1024 * 1024);
2090		dev_priv->mm.gtt_mtrr = -1;
2091	}
2092	io_mapping_free(dev_priv->mm.gtt_mapping);
2093out_rmmap:
2094	pci_iounmap(dev->pdev, dev_priv->regs);
2095put_bridge:
2096	pci_dev_put(dev_priv->bridge_dev);
2097free_priv:
 
 
 
 
2098	kfree(dev_priv);
 
2099	return ret;
2100}
2101
2102int i915_driver_unload(struct drm_device *dev)
2103{
2104	struct drm_i915_private *dev_priv = dev->dev_private;
2105	int ret;
2106
2107	spin_lock(&mchdev_lock);
2108	i915_mch_dev = NULL;
2109	spin_unlock(&mchdev_lock);
2110
2111	if (dev_priv->mm.inactive_shrinker.shrink)
2112		unregister_shrinker(&dev_priv->mm.inactive_shrinker);
2113
2114	mutex_lock(&dev->struct_mutex);
2115	ret = i915_gpu_idle(dev);
2116	if (ret)
2117		DRM_ERROR("failed to idle hardware: %d\n", ret);
2118	mutex_unlock(&dev->struct_mutex);
 
2119
2120	/* Cancel the retire work handler, which should be idle now. */
2121	cancel_delayed_work_sync(&dev_priv->mm.retire_work);
2122
2123	io_mapping_free(dev_priv->mm.gtt_mapping);
2124	if (dev_priv->mm.gtt_mtrr >= 0) {
2125		mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base,
2126			 dev->agp->agp_info.aper_size * 1024 * 1024);
2127		dev_priv->mm.gtt_mtrr = -1;
2128	}
 
 
2129
2130	acpi_video_unregister();
2131
2132	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2133		intel_fbdev_fini(dev);
2134		intel_modeset_cleanup(dev);
2135
2136		/*
2137		 * free the memory space allocated for the child device
2138		 * config parsed from VBT
2139		 */
2140		if (dev_priv->child_dev && dev_priv->child_dev_num) {
2141			kfree(dev_priv->child_dev);
2142			dev_priv->child_dev = NULL;
2143			dev_priv->child_dev_num = 0;
2144		}
2145
2146		vga_switcheroo_unregister_client(dev->pdev);
2147		vga_client_register(dev->pdev, NULL, NULL, NULL);
2148	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2149
2150	/* Free error state after interrupts are fully disabled. */
2151	del_timer_sync(&dev_priv->hangcheck_timer);
2152	cancel_work_sync(&dev_priv->error_work);
2153	i915_destroy_error_state(dev);
2154
2155	if (dev->pdev->msi_enabled)
2156		pci_disable_msi(dev->pdev);
2157
2158	intel_opregion_fini(dev);
2159
2160	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
2161		/* Flush any outstanding unpin_work. */
2162		flush_workqueue(dev_priv->wq);
2163
2164		mutex_lock(&dev->struct_mutex);
2165		i915_gem_free_all_phys_object(dev);
2166		i915_gem_cleanup_ringbuffer(dev);
2167		mutex_unlock(&dev->struct_mutex);
2168		if (I915_HAS_FBC(dev) && i915_powersave)
2169			i915_cleanup_compression(dev);
2170		drm_mm_takedown(&dev_priv->mm.stolen);
2171
2172		intel_cleanup_overlay(dev);
2173
2174		if (!I915_NEED_GFX_HWS(dev))
2175			i915_free_hws(dev);
2176	}
 
2177
2178	if (dev_priv->regs != NULL)
2179		pci_iounmap(dev->pdev, dev_priv->regs);
2180
2181	intel_teardown_gmbus(dev);
2182	intel_teardown_mchbar(dev);
2183
2184	destroy_workqueue(dev_priv->wq);
 
2185
 
2186	pci_dev_put(dev_priv->bridge_dev);
2187	kfree(dev->dev_private);
 
2188
2189	return 0;
2190}
2191
2192int i915_driver_open(struct drm_device *dev, struct drm_file *file)
2193{
2194	struct drm_i915_file_private *file_priv;
2195
2196	DRM_DEBUG_DRIVER("\n");
2197	file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
2198	if (!file_priv)
2199		return -ENOMEM;
2200
2201	file->driver_priv = file_priv;
2202
2203	spin_lock_init(&file_priv->mm.lock);
2204	INIT_LIST_HEAD(&file_priv->mm.request_list);
 
2205
2206	return 0;
2207}
2208
2209/**
2210 * i915_driver_lastclose - clean up after all DRM clients have exited
2211 * @dev: DRM device
2212 *
2213 * Take care of cleaning up after all DRM clients have exited.  In the
2214 * mode setting case, we want to restore the kernel's initial mode (just
2215 * in case the last client left us in a bad state).
2216 *
2217 * Additionally, in the non-mode setting case, we'll tear down the AGP
2218 * and DMA structures, since the kernel won't be using them, and clea
2219 * up any GEM state.
2220 */
2221void i915_driver_lastclose(struct drm_device * dev)
2222{
2223	drm_i915_private_t *dev_priv = dev->dev_private;
2224
2225	if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) {
2226		intel_fb_restore_mode(dev);
2227		vga_switcheroo_process_delayed_switch();
2228		return;
2229	}
2230
2231	i915_gem_lastclose(dev);
2232
2233	if (dev_priv->agp_heap)
2234		i915_mem_takedown(&(dev_priv->agp_heap));
2235
2236	i915_dma_cleanup(dev);
2237}
2238
2239void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
2240{
2241	drm_i915_private_t *dev_priv = dev->dev_private;
2242	i915_gem_release(dev, file_priv);
2243	if (!drm_core_check_feature(dev, DRIVER_MODESET))
2244		i915_mem_release(dev, file_priv, dev_priv->agp_heap);
2245}
2246
2247void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
2248{
2249	struct drm_i915_file_private *file_priv = file->driver_priv;
2250
2251	kfree(file_priv);
2252}
2253
2254struct drm_ioctl_desc i915_ioctls[] = {
2255	DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2256	DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
2257	DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH),
2258	DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
2259	DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
2260	DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
2261	DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH),
2262	DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2263	DRM_IOCTL_DEF_DRV(I915_ALLOC, i915_mem_alloc, DRM_AUTH),
2264	DRM_IOCTL_DEF_DRV(I915_FREE, i915_mem_free, DRM_AUTH),
2265	DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2266	DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
2267	DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2268	DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2269	DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH),
2270	DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
2271	DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
2272	DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2273	DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
2274	DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED),
2275	DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2276	DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED),
2277	DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
2278	DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED),
2279	DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2280	DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED),
2281	DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED),
2282	DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED),
2283	DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED),
2284	DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED),
2285	DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED),
2286	DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED),
2287	DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED),
2288	DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED),
2289	DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED),
2290	DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED),
2291	DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED),
2292	DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED),
2293	DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2294	DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
2295};
2296
2297int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
2298
2299/**
2300 * Determine if the device really is AGP or not.
2301 *
2302 * All Intel graphics chipsets are treated as AGP, even if they are really
2303 * PCI-e.
2304 *
2305 * \param dev   The device to be tested.
2306 *
2307 * \returns
2308 * A value of 1 is always retured to indictate every i9x5 is AGP.
2309 */
2310int i915_driver_device_is_agp(struct drm_device * dev)
2311{
2312	return 1;
2313}