WebSVN – Kolibri OS – Blame – /drivers/video/drm/i915/i915_irq.c

Rev	Author	Line No.	Line
2351	Serge	1	/* i915_irq.c -- IRQ 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
3746	Serge	29	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
3031	serge	30
		31	#include
		32	#include
		33	#include
2351	Serge	34	#include "i915_drv.h"
		35	#include "i915_trace.h"
		36	#include "intel_drv.h"
		37
4104	Serge	38	#define assert_spin_locked(a)
		39
3746	Serge	40	static const u32 hpd_ibx[] = {
		41	[HPD_CRT] = SDE_CRT_HOTPLUG,
		42	[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
		43	[HPD_PORT_B] = SDE_PORTB_HOTPLUG,
		44	[HPD_PORT_C] = SDE_PORTC_HOTPLUG,
		45	[HPD_PORT_D] = SDE_PORTD_HOTPLUG
		46	};
3031	serge	47
3746	Serge	48	static const u32 hpd_cpt[] = {
		49	[HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
		50	[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
		51	[HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
		52	[HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
		53	[HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
		54	};
		55
		56	static const u32 hpd_mask_i915[] = {
		57	[HPD_CRT] = CRT_HOTPLUG_INT_EN,
		58	[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
		59	[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
		60	[HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
		61	[HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
		62	[HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
		63	};
		64
		65	static const u32 hpd_status_gen4[] = {
		66	[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
		67	[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
		68	[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
		69	[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
		70	[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
		71	[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
		72	};
		73
		74	static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
		75	[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
		76	[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
		77	[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
		78	[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
		79	[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
		80	[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
		81	};
		82
		83
3031	serge	84	#define pr_err(fmt, ...) \
		85	printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
		86
		87
2352	Serge	88	#define DRM_WAKEUP( queue ) wake_up( queue )
		89	#define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue )
		90
2351	Serge	91	#define MAX_NOPID ((u32)~0)
		92
		93
		94
		95	/* For display hotplug interrupt */
		96	static void
		97	ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
		98	{
4104	Serge	99	assert_spin_locked(&dev_priv->irq_lock);
		100
		101	if (dev_priv->pc8.irqs_disabled) {
		102	WARN(1, "IRQs disabled\n");
		103	dev_priv->pc8.regsave.deimr &= ~mask;
		104	return;
		105	}
		106
2351	Serge	107	if ((dev_priv->irq_mask & mask) != 0) {
		108	dev_priv->irq_mask &= ~mask;
		109	I915_WRITE(DEIMR, dev_priv->irq_mask);
		110	POSTING_READ(DEIMR);
		111	}
		112	}
		113
3746	Serge	114	static void
2351	Serge	115	ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
		116	{
4104	Serge	117	assert_spin_locked(&dev_priv->irq_lock);
		118
		119	if (dev_priv->pc8.irqs_disabled) {
		120	WARN(1, "IRQs disabled\n");
		121	dev_priv->pc8.regsave.deimr \|= mask;
		122	return;
		123	}
		124
2351	Serge	125	if ((dev_priv->irq_mask & mask) != mask) {
		126	dev_priv->irq_mask \|= mask;
		127	I915_WRITE(DEIMR, dev_priv->irq_mask);
		128	POSTING_READ(DEIMR);
		129	}
		130	}
3031	serge	131
4104	Serge	132	/**
		133	* ilk_update_gt_irq - update GTIMR
		134	* @dev_priv: driver private
		135	* @interrupt_mask: mask of interrupt bits to update
		136	* @enabled_irq_mask: mask of interrupt bits to enable
		137	*/
		138	static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
		139	uint32_t interrupt_mask,
		140	uint32_t enabled_irq_mask)
		141	{
		142	assert_spin_locked(&dev_priv->irq_lock);
		143
		144	if (dev_priv->pc8.irqs_disabled) {
		145	WARN(1, "IRQs disabled\n");
		146	dev_priv->pc8.regsave.gtimr &= ~interrupt_mask;
		147	dev_priv->pc8.regsave.gtimr \|= (~enabled_irq_mask &
		148	interrupt_mask);
		149	return;
		150	}
		151
		152	dev_priv->gt_irq_mask &= ~interrupt_mask;
		153	dev_priv->gt_irq_mask \|= (~enabled_irq_mask & interrupt_mask);
		154	I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
		155	POSTING_READ(GTIMR);
		156	}
		157
		158	void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
		159	{
		160	ilk_update_gt_irq(dev_priv, mask, mask);
		161	}
		162
		163	void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
		164	{
		165	ilk_update_gt_irq(dev_priv, mask, 0);
		166	}
		167
		168	/**
		169	* snb_update_pm_irq - update GEN6_PMIMR
		170	* @dev_priv: driver private
		171	* @interrupt_mask: mask of interrupt bits to update
		172	* @enabled_irq_mask: mask of interrupt bits to enable
		173	*/
		174	static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
		175	uint32_t interrupt_mask,
		176	uint32_t enabled_irq_mask)
		177	{
		178	uint32_t new_val;
		179
		180	assert_spin_locked(&dev_priv->irq_lock);
		181
		182	if (dev_priv->pc8.irqs_disabled) {
		183	WARN(1, "IRQs disabled\n");
		184	dev_priv->pc8.regsave.gen6_pmimr &= ~interrupt_mask;
		185	dev_priv->pc8.regsave.gen6_pmimr \|= (~enabled_irq_mask &
		186	interrupt_mask);
		187	return;
		188	}
		189
		190	new_val = dev_priv->pm_irq_mask;
		191	new_val &= ~interrupt_mask;
		192	new_val \|= (~enabled_irq_mask & interrupt_mask);
		193
		194	if (new_val != dev_priv->pm_irq_mask) {
		195	dev_priv->pm_irq_mask = new_val;
		196	I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
		197	POSTING_READ(GEN6_PMIMR);
		198	}
		199	}
		200
		201	void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
		202	{
		203	snb_update_pm_irq(dev_priv, mask, mask);
		204	}
		205
		206	void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
		207	{
		208	snb_update_pm_irq(dev_priv, mask, 0);
		209	}
		210
		211	static bool ivb_can_enable_err_int(struct drm_device *dev)
		212	{
		213	struct drm_i915_private *dev_priv = dev->dev_private;
		214	struct intel_crtc *crtc;
		215	enum pipe pipe;
		216
		217	assert_spin_locked(&dev_priv->irq_lock);
		218
		219	for_each_pipe(pipe) {
		220	crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
		221
		222	if (crtc->cpu_fifo_underrun_disabled)
		223	return false;
		224	}
		225
		226	return true;
		227	}
		228
		229	static bool cpt_can_enable_serr_int(struct drm_device *dev)
		230	{
		231	struct drm_i915_private *dev_priv = dev->dev_private;
		232	enum pipe pipe;
		233	struct intel_crtc *crtc;
		234
		235	assert_spin_locked(&dev_priv->irq_lock);
		236
		237	for_each_pipe(pipe) {
		238	crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
		239
		240	if (crtc->pch_fifo_underrun_disabled)
		241	return false;
		242	}
		243
		244	return true;
		245	}
		246
		247	static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
		248	enum pipe pipe, bool enable)
		249	{
		250	struct drm_i915_private *dev_priv = dev->dev_private;
		251	uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
		252	DE_PIPEB_FIFO_UNDERRUN;
		253
		254	if (enable)
		255	ironlake_enable_display_irq(dev_priv, bit);
		256	else
		257	ironlake_disable_display_irq(dev_priv, bit);
		258	}
		259
		260	static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
		261	enum pipe pipe, bool enable)
		262	{
		263	struct drm_i915_private *dev_priv = dev->dev_private;
		264	if (enable) {
		265	I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
		266
		267	if (!ivb_can_enable_err_int(dev))
		268	return;
		269
		270	ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
		271	} else {
		272	bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB);
		273
		274	/* Change the state _after_ we've read out the current one. */
		275	ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
		276
		277	if (!was_enabled &&
		278	(I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) {
		279	DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
		280	pipe_name(pipe));
		281	}
		282	}
		283	}
		284
		285	/**
		286	* ibx_display_interrupt_update - update SDEIMR
		287	* @dev_priv: driver private
		288	* @interrupt_mask: mask of interrupt bits to update
		289	* @enabled_irq_mask: mask of interrupt bits to enable
		290	*/
		291	static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
		292	uint32_t interrupt_mask,
		293	uint32_t enabled_irq_mask)
		294	{
		295	uint32_t sdeimr = I915_READ(SDEIMR);
		296	sdeimr &= ~interrupt_mask;
		297	sdeimr \|= (~enabled_irq_mask & interrupt_mask);
		298
		299	assert_spin_locked(&dev_priv->irq_lock);
		300
		301	if (dev_priv->pc8.irqs_disabled &&
		302	(interrupt_mask & SDE_HOTPLUG_MASK_CPT)) {
		303	WARN(1, "IRQs disabled\n");
		304	dev_priv->pc8.regsave.sdeimr &= ~interrupt_mask;
		305	dev_priv->pc8.regsave.sdeimr \|= (~enabled_irq_mask &
		306	interrupt_mask);
		307	return;
		308	}
		309
		310	I915_WRITE(SDEIMR, sdeimr);
		311	POSTING_READ(SDEIMR);
		312	}
		313	#define ibx_enable_display_interrupt(dev_priv, bits) \
		314	ibx_display_interrupt_update((dev_priv), (bits), (bits))
		315	#define ibx_disable_display_interrupt(dev_priv, bits) \
		316	ibx_display_interrupt_update((dev_priv), (bits), 0)
		317
		318	static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
		319	enum transcoder pch_transcoder,
		320	bool enable)
		321	{
		322	struct drm_i915_private *dev_priv = dev->dev_private;
		323	uint32_t bit = (pch_transcoder == TRANSCODER_A) ?
		324	SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
		325
		326	if (enable)
		327	ibx_enable_display_interrupt(dev_priv, bit);
		328	else
		329	ibx_disable_display_interrupt(dev_priv, bit);
		330	}
		331
		332	static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
		333	enum transcoder pch_transcoder,
		334	bool enable)
		335	{
		336	struct drm_i915_private *dev_priv = dev->dev_private;
		337
		338	if (enable) {
		339	I915_WRITE(SERR_INT,
		340	SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
		341
		342	if (!cpt_can_enable_serr_int(dev))
		343	return;
		344
		345	ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
		346	} else {
		347	uint32_t tmp = I915_READ(SERR_INT);
		348	bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT);
		349
		350	/* Change the state _after_ we've read out the current one. */
		351	ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
		352
		353	if (!was_enabled &&
		354	(tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) {
		355	DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
		356	transcoder_name(pch_transcoder));
		357	}
		358	}
		359	}
		360
		361	/**
		362	* intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
		363	* @dev: drm device
		364	* @pipe: pipe
		365	* @enable: true if we want to report FIFO underrun errors, false otherwise
		366	*
		367	* This function makes us disable or enable CPU fifo underruns for a specific
		368	* pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
		369	* reporting for one pipe may also disable all the other CPU error interruts for
		370	* the other pipes, due to the fact that there's just one interrupt mask/enable
		371	* bit for all the pipes.
		372	*
		373	* Returns the previous state of underrun reporting.
		374	*/
		375	bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
		376	enum pipe pipe, bool enable)
		377	{
		378	struct drm_i915_private *dev_priv = dev->dev_private;
		379	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
		380	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
		381	unsigned long flags;
		382	bool ret;
		383
		384	spin_lock_irqsave(&dev_priv->irq_lock, flags);
		385
		386	ret = !intel_crtc->cpu_fifo_underrun_disabled;
		387
		388	if (enable == ret)
		389	goto done;
		390
		391	intel_crtc->cpu_fifo_underrun_disabled = !enable;
		392
		393	if (IS_GEN5(dev) \|\| IS_GEN6(dev))
		394	ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
		395	else if (IS_GEN7(dev))
		396	ivybridge_set_fifo_underrun_reporting(dev, pipe, enable);
		397
		398	done:
		399	spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
		400	return ret;
		401	}
		402
		403	/**
		404	* intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
		405	* @dev: drm device
		406	* @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
		407	* @enable: true if we want to report FIFO underrun errors, false otherwise
		408	*
		409	* This function makes us disable or enable PCH fifo underruns for a specific
		410	* PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
		411	* underrun reporting for one transcoder may also disable all the other PCH
		412	* error interruts for the other transcoders, due to the fact that there's just
		413	* one interrupt mask/enable bit for all the transcoders.
		414	*
		415	* Returns the previous state of underrun reporting.
		416	*/
		417	bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
		418	enum transcoder pch_transcoder,
		419	bool enable)
		420	{
		421	struct drm_i915_private *dev_priv = dev->dev_private;
		422	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
		423	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
		424	unsigned long flags;
		425	bool ret;
		426
		427	/*
		428	* NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
		429	* has only one pch transcoder A that all pipes can use. To avoid racy
		430	* pch transcoder -> pipe lookups from interrupt code simply store the
		431	* underrun statistics in crtc A. Since we never expose this anywhere
		432	* nor use it outside of the fifo underrun code here using the "wrong"
		433	* crtc on LPT won't cause issues.
		434	*/
		435
		436	spin_lock_irqsave(&dev_priv->irq_lock, flags);
		437
		438	ret = !intel_crtc->pch_fifo_underrun_disabled;
		439
		440	if (enable == ret)
		441	goto done;
		442
		443	intel_crtc->pch_fifo_underrun_disabled = !enable;
		444
		445	if (HAS_PCH_IBX(dev))
		446	ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
		447	else
		448	cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
		449
		450	done:
		451	spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
		452	return ret;
		453	}
		454
		455
3031	serge	456	void
		457	i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
		458	{
		459	u32 reg = PIPESTAT(pipe);
3746	Serge	460	u32 pipestat = I915_READ(reg) & 0x7fff0000;
3031	serge	461
4104	Serge	462	assert_spin_locked(&dev_priv->irq_lock);
		463
3746	Serge	464	if ((pipestat & mask) == mask)
		465	return;
		466
3031	serge	467	/* Enable the interrupt, clear any pending status */
3746	Serge	468	pipestat \|= mask \| (mask >> 16);
		469	I915_WRITE(reg, pipestat);
3031	serge	470	POSTING_READ(reg);
		471	}
		472
		473	void
		474	i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
		475	{
		476	u32 reg = PIPESTAT(pipe);
3746	Serge	477	u32 pipestat = I915_READ(reg) & 0x7fff0000;
3031	serge	478
4104	Serge	479	assert_spin_locked(&dev_priv->irq_lock);
		480
3746	Serge	481	if ((pipestat & mask) == 0)
		482	return;
		483
		484	pipestat &= ~mask;
		485	I915_WRITE(reg, pipestat);
3031	serge	486	POSTING_READ(reg);
		487	}
		488
		489	/**
4104	Serge	490	* i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
3031	serge	491	*/
4104	Serge	492	static void i915_enable_asle_pipestat(struct drm_device *dev)
3031	serge	493	{
		494	drm_i915_private_t *dev_priv = dev->dev_private;
		495	unsigned long irqflags;
		496
4104	Serge	497	if (!dev_priv->opregion.asle \|\| !IS_MOBILE(dev))
3031	serge	498	return;
		499
		500	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		501
4104	Serge	502	i915_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
3031	serge	503	if (INTEL_INFO(dev)->gen >= 4)
4104	Serge	504	i915_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
3031	serge	505
		506	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		507	}
		508
		509	/**
		510	* i915_pipe_enabled - check if a pipe is enabled
		511	* @dev: DRM device
		512	* @pipe: pipe to check
		513	*
		514	* Reading certain registers when the pipe is disabled can hang the chip.
		515	* Use this routine to make sure the PLL is running and the pipe is active
		516	* before reading such registers if unsure.
		517	*/
		518	static int
		519	i915_pipe_enabled(struct drm_device *dev, int pipe)
		520	{
		521	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
3243	Serge	522
4104	Serge	523	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		524	/* Locking is horribly broken here, but whatever. */
		525	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
		526	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
		527
		528	return intel_crtc->active;
		529	} else {
		530	return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
		531	}
3031	serge	532	}
		533
		534	/* Called from drm generic code, passed a 'crtc', which
		535	* we use as a pipe index
		536	*/
		537	static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
		538	{
		539	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		540	unsigned long high_frame;
		541	unsigned long low_frame;
		542	u32 high1, high2, low;
		543
		544	if (!i915_pipe_enabled(dev, pipe)) {
		545	DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
		546	"pipe %c\n", pipe_name(pipe));
		547	return 0;
		548	}
		549
		550	high_frame = PIPEFRAME(pipe);
		551	low_frame = PIPEFRAMEPIXEL(pipe);
		552
		553	/*
		554	* High & low register fields aren't synchronized, so make sure
		555	* we get a low value that's stable across two reads of the high
		556	* register.
		557	*/
		558	do {
		559	high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
		560	low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
		561	high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
		562	} while (high1 != high2);
		563
		564	high1 >>= PIPE_FRAME_HIGH_SHIFT;
		565	low >>= PIPE_FRAME_LOW_SHIFT;
		566	return (high1 << 8) \| low;
		567	}
		568
		569	static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
		570	{
		571	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		572	int reg = PIPE_FRMCOUNT_GM45(pipe);
		573
		574	if (!i915_pipe_enabled(dev, pipe)) {
		575	DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
		576	"pipe %c\n", pipe_name(pipe));
		577	return 0;
		578	}
		579
		580	return I915_READ(reg);
		581	}
		582
3746	Serge	583	static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
		584	int vpos, int hpos)
		585	{
		586	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		587	u32 vbl = 0, position = 0;
		588	int vbl_start, vbl_end, htotal, vtotal;
		589	bool in_vbl = true;
		590	int ret = 0;
		591	enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
		592	pipe);
		593
		594	if (!i915_pipe_enabled(dev, pipe)) {
		595	DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
		596	"pipe %c\n", pipe_name(pipe));
		597	return 0;
		598	}
		599
		600	/* Get vtotal. */
		601	vtotal = 1 + ((I915_READ(VTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
		602
		603	if (INTEL_INFO(dev)->gen >= 4) {
		604	/* No obvious pixelcount register. Only query vertical
		605	* scanout position from Display scan line register.
		606	*/
		607	position = I915_READ(PIPEDSL(pipe));
		608
		609	/* Decode into vertical scanout position. Don't have
		610	* horizontal scanout position.
		611	*/
		612	*vpos = position & 0x1fff;
		613	*hpos = 0;
		614	} else {
		615	/* Have access to pixelcount since start of frame.
		616	* We can split this into vertical and horizontal
		617	* scanout position.
		618	*/
		619	position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
		620
		621	htotal = 1 + ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff);
		622	*vpos = position / htotal;
		623	hpos = position - (vpos * htotal);
		624	}
		625
		626	/* Query vblank area. */
		627	vbl = I915_READ(VBLANK(cpu_transcoder));
		628
		629	/* Test position against vblank region. */
		630	vbl_start = vbl & 0x1fff;
		631	vbl_end = (vbl >> 16) & 0x1fff;
		632
		633	if ((vpos < vbl_start) \|\| (vpos > vbl_end))
		634	in_vbl = false;
		635
		636	/* Inside "upper part" of vblank area? Apply corrective offset: */
		637	if (in_vbl && (*vpos >= vbl_start))
		638	vpos = vpos - vtotal;
		639
		640	/* Readouts valid? */
		641	if (vbl > 0)
		642	ret \|= DRM_SCANOUTPOS_VALID \| DRM_SCANOUTPOS_ACCURATE;
		643
		644	/* In vblank? */
		645	if (in_vbl)
		646	ret \|= DRM_SCANOUTPOS_INVBL;
		647
		648	return ret;
		649	}
		650
		651	static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
		652	int *max_error,
		653	struct timeval *vblank_time,
		654	unsigned flags)
		655	{
		656	struct drm_crtc *crtc;
		657
		658	if (pipe < 0 \|\| pipe >= INTEL_INFO(dev)->num_pipes) {
		659	DRM_ERROR("Invalid crtc %d\n", pipe);
		660	return -EINVAL;
		661	}
		662
		663	/* Get drm_crtc to timestamp: */
		664	crtc = intel_get_crtc_for_pipe(dev, pipe);
		665	if (crtc == NULL) {
		666	DRM_ERROR("Invalid crtc %d\n", pipe);
		667	return -EINVAL;
		668	}
		669
		670	if (!crtc->enabled) {
		671	DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
		672	return -EBUSY;
		673	}
		674
		675	/* Helper routine in DRM core does all the work: */
		676	return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
		677	vblank_time, flags,
		678	crtc);
		679	}
		680
4104	Serge	681	static int intel_hpd_irq_event(struct drm_device dev, struct drm_connector connector)
		682	{
		683	enum drm_connector_status old_status;
		684
		685	WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
		686	old_status = connector->status;
		687
		688	connector->status = connector->funcs->detect(connector, false);
		689	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
		690	connector->base.id,
		691	drm_get_connector_name(connector),
		692	old_status, connector->status);
		693	return (old_status != connector->status);
		694	}
		695
3480	Serge	696	/*
		697	* Handle hotplug events outside the interrupt handler proper.
		698	*/
3746	Serge	699	#define I915_REENABLE_HOTPLUG_DELAY (2601000)
		700
3480	Serge	701	static void i915_hotplug_work_func(struct work_struct *work)
		702	{
		703	drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
		704	hotplug_work);
		705	struct drm_device *dev = dev_priv->dev;
		706	struct drm_mode_config *mode_config = &dev->mode_config;
3746	Serge	707	struct intel_connector *intel_connector;
		708	struct intel_encoder *intel_encoder;
		709	struct drm_connector *connector;
		710	unsigned long irqflags;
		711	bool hpd_disabled = false;
4104	Serge	712	bool changed = false;
		713	u32 hpd_event_bits;
3031	serge	714
3480	Serge	715	/* HPD irq before everything is fully set up. */
		716	if (!dev_priv->enable_hotplug_processing)
		717	return;
		718
		719	mutex_lock(&mode_config->mutex);
		720	DRM_DEBUG_KMS("running encoder hotplug functions\n");
		721
3746	Serge	722	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4104	Serge	723
		724	hpd_event_bits = dev_priv->hpd_event_bits;
		725	dev_priv->hpd_event_bits = 0;
3746	Serge	726	list_for_each_entry(connector, &mode_config->connector_list, head) {
		727	intel_connector = to_intel_connector(connector);
		728	intel_encoder = intel_connector->encoder;
		729	if (intel_encoder->hpd_pin > HPD_NONE &&
		730	dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
		731	connector->polled == DRM_CONNECTOR_POLL_HPD) {
		732	DRM_INFO("HPD interrupt storm detected on connector %s: "
		733	"switching from hotplug detection to polling\n",
		734	drm_get_connector_name(connector));
		735	dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
		736	connector->polled = DRM_CONNECTOR_POLL_CONNECT
		737	\| DRM_CONNECTOR_POLL_DISCONNECT;
		738	hpd_disabled = true;
		739	}
4104	Serge	740	if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
		741	DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
		742	drm_get_connector_name(connector), intel_encoder->hpd_pin);
		743	}
3746	Serge	744	}
		745	/* if there were no outputs to poll, poll was disabled,
		746	* therefore make sure it's enabled when disabling HPD on
		747	* some connectors */
		748	if (hpd_disabled) {
		749	drm_kms_helper_poll_enable(dev);
4126	Serge	750	mod_timer(&dev_priv->hotplug_reenable_timer,
		751	GetTimerTicks() + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
3746	Serge	752	}
3480	Serge	753
3746	Serge	754	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		755
4104	Serge	756	list_for_each_entry(connector, &mode_config->connector_list, head) {
		757	intel_connector = to_intel_connector(connector);
		758	intel_encoder = intel_connector->encoder;
		759	if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
3746	Serge	760	if (intel_encoder->hot_plug)
		761	intel_encoder->hot_plug(intel_encoder);
4104	Serge	762	if (intel_hpd_irq_event(dev, connector))
		763	changed = true;
		764	}
		765	}
3480	Serge	766	mutex_unlock(&mode_config->mutex);
		767
4104	Serge	768	if (changed)
		769	drm_kms_helper_hotplug_event(dev);
3480	Serge	770	}
		771
4104	Serge	772	static void ironlake_rps_change_irq_handler(struct drm_device *dev)
3746	Serge	773	{
		774	drm_i915_private_t *dev_priv = dev->dev_private;
		775	u32 busy_up, busy_down, max_avg, min_avg;
		776	u8 new_delay;
		777
4104	Serge	778	spin_lock(&mchdev_lock);
3746	Serge	779
		780	I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
		781
		782	new_delay = dev_priv->ips.cur_delay;
		783
		784	I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
		785	busy_up = I915_READ(RCPREVBSYTUPAVG);
		786	busy_down = I915_READ(RCPREVBSYTDNAVG);
		787	max_avg = I915_READ(RCBMAXAVG);
		788	min_avg = I915_READ(RCBMINAVG);
		789
		790	/* Handle RCS change request from hw */
		791	if (busy_up > max_avg) {
		792	if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
		793	new_delay = dev_priv->ips.cur_delay - 1;
		794	if (new_delay < dev_priv->ips.max_delay)
		795	new_delay = dev_priv->ips.max_delay;
		796	} else if (busy_down < min_avg) {
		797	if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
		798	new_delay = dev_priv->ips.cur_delay + 1;
		799	if (new_delay > dev_priv->ips.min_delay)
		800	new_delay = dev_priv->ips.min_delay;
		801	}
		802
		803	if (ironlake_set_drps(dev, new_delay))
		804	dev_priv->ips.cur_delay = new_delay;
		805
4104	Serge	806	spin_unlock(&mchdev_lock);
3746	Serge	807
		808	return;
		809	}
		810
2352	Serge	811	static void notify_ring(struct drm_device *dev,
		812	struct intel_ring_buffer *ring)
		813	{
		814	if (ring->obj == NULL)
		815	return;
2351	Serge	816
3031	serge	817	trace_i915_gem_request_complete(ring, ring->get_seqno(ring, false));
2351	Serge	818
2352	Serge	819	wake_up_all(&ring->irq_queue);
		820	}
		821
3031	serge	822	static void gen6_pm_rps_work(struct work_struct *work)
		823	{
		824	drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
		825	rps.work);
4104	Serge	826	u32 pm_iir;
3031	serge	827	u8 new_delay;
2352	Serge	828
4104	Serge	829	spin_lock_irq(&dev_priv->irq_lock);
3031	serge	830	pm_iir = dev_priv->rps.pm_iir;
		831	dev_priv->rps.pm_iir = 0;
4104	Serge	832	/* Make sure not to corrupt PMIMR state used by ringbuffer code */
		833	snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
		834	spin_unlock_irq(&dev_priv->irq_lock);
2352	Serge	835
4104	Serge	836	/* Make sure we didn't queue anything we're not going to process. */
		837	WARN_ON(pm_iir & ~GEN6_PM_RPS_EVENTS);
		838
		839	if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
3031	serge	840	return;
		841
3243	Serge	842	mutex_lock(&dev_priv->rps.hw_lock);
3031	serge	843
4104	Serge	844	if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
3031	serge	845	new_delay = dev_priv->rps.cur_delay + 1;
4104	Serge	846
		847	/*
		848	* For better performance, jump directly
		849	* to RPe if we're below it.
		850	*/
		851	if (IS_VALLEYVIEW(dev_priv->dev) &&
		852	dev_priv->rps.cur_delay < dev_priv->rps.rpe_delay)
		853	new_delay = dev_priv->rps.rpe_delay;
		854	} else
3031	serge	855	new_delay = dev_priv->rps.cur_delay - 1;
		856
		857	/* sysfs frequency interfaces may have snuck in while servicing the
		858	* interrupt
		859	*/
4104	Serge	860	if (new_delay >= dev_priv->rps.min_delay &&
		861	new_delay <= dev_priv->rps.max_delay) {
		862	if (IS_VALLEYVIEW(dev_priv->dev))
		863	valleyview_set_rps(dev_priv->dev, new_delay);
		864	else
3031	serge	865	gen6_set_rps(dev_priv->dev, new_delay);
		866	}
		867
4104	Serge	868	if (IS_VALLEYVIEW(dev_priv->dev)) {
		869	/*
		870	* On VLV, when we enter RC6 we may not be at the minimum
		871	* voltage level, so arm a timer to check. It should only
		872	* fire when there's activity or once after we've entered
		873	* RC6, and then won't be re-armed until the next RPS interrupt.
		874	*/
4126	Serge	875	// mod_delayed_work(dev_priv->wq, &dev_priv->rps.vlv_work,
		876	// msecs_to_jiffies(100));
4104	Serge	877	}
		878
3243	Serge	879	mutex_unlock(&dev_priv->rps.hw_lock);
3031	serge	880	}
		881
		882
		883	/**
		884	* ivybridge_parity_work - Workqueue called when a parity error interrupt
		885	* occurred.
		886	* @work: workqueue struct
		887	*
		888	* Doesn't actually do anything except notify userspace. As a consequence of
		889	* this event, userspace should try to remap the bad rows since statistically
		890	* it is likely the same row is more likely to go bad again.
		891	*/
		892	static void ivybridge_parity_work(struct work_struct *work)
2351	Serge	893	{
3031	serge	894	drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
3243	Serge	895	l3_parity.error_work);
3031	serge	896	u32 error_status, row, bank, subbank;
		897	char *parity_event[5];
		898	uint32_t misccpctl;
		899	unsigned long flags;
		900
		901	/* We must turn off DOP level clock gating to access the L3 registers.
		902	* In order to prevent a get/put style interface, acquire struct mutex
		903	* any time we access those registers.
		904	*/
		905	mutex_lock(&dev_priv->dev->struct_mutex);
		906
		907	misccpctl = I915_READ(GEN7_MISCCPCTL);
		908	I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
		909	POSTING_READ(GEN7_MISCCPCTL);
		910
		911	error_status = I915_READ(GEN7_L3CDERRST1);
		912	row = GEN7_PARITY_ERROR_ROW(error_status);
		913	bank = GEN7_PARITY_ERROR_BANK(error_status);
		914	subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
		915
		916	I915_WRITE(GEN7_L3CDERRST1, GEN7_PARITY_ERROR_VALID \|
		917	GEN7_L3CDERRST1_ENABLE);
		918	POSTING_READ(GEN7_L3CDERRST1);
		919
		920	I915_WRITE(GEN7_MISCCPCTL, misccpctl);
		921
		922	spin_lock_irqsave(&dev_priv->irq_lock, flags);
4104	Serge	923	ilk_enable_gt_irq(dev_priv, GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
3031	serge	924	spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
		925
		926	mutex_unlock(&dev_priv->dev->struct_mutex);
		927
		928	DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
		929	row, bank, subbank);
		930
		931	}
		932
4104	Serge	933	static void ivybridge_parity_error_irq_handler(struct drm_device *dev)
3031	serge	934	{
		935	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		936
		937	if (!HAS_L3_GPU_CACHE(dev))
		938	return;
		939
4104	Serge	940	spin_lock(&dev_priv->irq_lock);
		941	ilk_disable_gt_irq(dev_priv, GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
		942	spin_unlock(&dev_priv->irq_lock);
3031	serge	943
3243	Serge	944	queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
3031	serge	945	}
		946
4104	Serge	947	static void ilk_gt_irq_handler(struct drm_device *dev,
		948	struct drm_i915_private *dev_priv,
		949	u32 gt_iir)
		950	{
		951	if (gt_iir &
		952	(GT_RENDER_USER_INTERRUPT \| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
		953	notify_ring(dev, &dev_priv->ring[RCS]);
		954	if (gt_iir & ILK_BSD_USER_INTERRUPT)
		955	notify_ring(dev, &dev_priv->ring[VCS]);
		956	}
		957
3031	serge	958	static void snb_gt_irq_handler(struct drm_device *dev,
		959	struct drm_i915_private *dev_priv,
		960	u32 gt_iir)
		961	{
		962
4104	Serge	963	if (gt_iir &
		964	(GT_RENDER_USER_INTERRUPT \| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
3031	serge	965	notify_ring(dev, &dev_priv->ring[RCS]);
4104	Serge	966	if (gt_iir & GT_BSD_USER_INTERRUPT)
3031	serge	967	notify_ring(dev, &dev_priv->ring[VCS]);
4104	Serge	968	if (gt_iir & GT_BLT_USER_INTERRUPT)
3031	serge	969	notify_ring(dev, &dev_priv->ring[BCS]);
		970
4104	Serge	971	if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT \|
		972	GT_BSD_CS_ERROR_INTERRUPT \|
		973	GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
3031	serge	974	DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
4126	Serge	975	i915_handle_error(dev, false);
3031	serge	976	}
		977
4126	Serge	978	if (gt_iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
		979	ivybridge_parity_error_irq_handler(dev);
3031	serge	980	}
		981
3746	Serge	982	#define HPD_STORM_DETECT_PERIOD 1000
		983	#define HPD_STORM_THRESHOLD 5
		984
4104	Serge	985	static inline void intel_hpd_irq_handler(struct drm_device *dev,
3746	Serge	986	u32 hotplug_trigger,
		987	const u32 *hpd)
		988	{
		989	drm_i915_private_t *dev_priv = dev->dev_private;
		990	int i;
4104	Serge	991	bool storm_detected = false;
3746	Serge	992
4104	Serge	993	if (!hotplug_trigger)
		994	return;
3746	Serge	995
4104	Serge	996	spin_lock(&dev_priv->irq_lock);
3746	Serge	997	for (i = 1; i < HPD_NUM_PINS; i++) {
		998
4104	Serge	999	WARN(((hpd[i] & hotplug_trigger) &&
		1000	dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED),
		1001	"Received HPD interrupt although disabled\n");
		1002
3746	Serge	1003	if (!(hpd[i] & hotplug_trigger) \|\|
		1004	dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
		1005	continue;
		1006
4104	Serge	1007	dev_priv->hpd_event_bits \|= (1 << i);
4126	Serge	1008	if (!time_in_range(GetTimerTicks(), dev_priv->hpd_stats[i].hpd_last_jiffies,
		1009	dev_priv->hpd_stats[i].hpd_last_jiffies
		1010	+ msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
		1011	dev_priv->hpd_stats[i].hpd_last_jiffies = GetTimerTicks();
		1012	dev_priv->hpd_stats[i].hpd_cnt = 0;
		1013	DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i);
		1014	} else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
		1015	dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
		1016	dev_priv->hpd_event_bits &= ~(1 << i);
		1017	DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
		1018	storm_detected = true;
		1019	} else {
3746	Serge	1020	dev_priv->hpd_stats[i].hpd_cnt++;
4126	Serge	1021	DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i,
		1022	dev_priv->hpd_stats[i].hpd_cnt);
		1023	}
3746	Serge	1024	}
		1025
4104	Serge	1026	if (storm_detected)
		1027	dev_priv->display.hpd_irq_setup(dev);
		1028	spin_unlock(&dev_priv->irq_lock);
3746	Serge	1029
4126	Serge	1030	/*
		1031	* Our hotplug handler can grab modeset locks (by calling down into the
		1032	* fb helpers). Hence it must not be run on our own dev-priv->wq work
		1033	* queue for otherwise the flush_work in the pageflip code will
		1034	* deadlock.
		1035	*/
		1036	schedule_work(&dev_priv->hotplug_work);
3746	Serge	1037	}
		1038
3480	Serge	1039	static void gmbus_irq_handler(struct drm_device *dev)
		1040	{
		1041	struct drm_i915_private dev_priv = (drm_i915_private_t ) dev->dev_private;
		1042
		1043	wake_up_all(&dev_priv->gmbus_wait_queue);
		1044	}
		1045
		1046	static void dp_aux_irq_handler(struct drm_device *dev)
		1047	{
		1048	struct drm_i915_private dev_priv = (drm_i915_private_t ) dev->dev_private;
		1049
		1050	wake_up_all(&dev_priv->gmbus_wait_queue);
		1051	}
		1052
4104	Serge	1053	/* The RPS events need forcewake, so we add them to a work queue and mask their
		1054	* IMR bits until the work is done. Other interrupts can be processed without
		1055	* the work queue. */
		1056	static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
		1057	{
		1058	if (pm_iir & GEN6_PM_RPS_EVENTS) {
		1059	spin_lock(&dev_priv->irq_lock);
		1060	dev_priv->rps.pm_iir \|= pm_iir & GEN6_PM_RPS_EVENTS;
		1061	snb_disable_pm_irq(dev_priv, pm_iir & GEN6_PM_RPS_EVENTS);
		1062	spin_unlock(&dev_priv->irq_lock);
		1063
		1064	queue_work(dev_priv->wq, &dev_priv->rps.work);
		1065	}
		1066
		1067	if (HAS_VEBOX(dev_priv->dev)) {
		1068	if (pm_iir & PM_VEBOX_USER_INTERRUPT)
		1069	notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
		1070
		1071	if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
		1072	DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
4126	Serge	1073	i915_handle_error(dev_priv->dev, false);
4104	Serge	1074	}
		1075	}
		1076	}
		1077
3243	Serge	1078	static irqreturn_t valleyview_irq_handler(int irq, void *arg)
3031	serge	1079	{
		1080	struct drm_device dev = (struct drm_device ) arg;
		1081	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1082	u32 iir, gt_iir, pm_iir;
		1083	irqreturn_t ret = IRQ_NONE;
		1084	unsigned long irqflags;
		1085	int pipe;
		1086	u32 pipe_stats[I915_MAX_PIPES];
		1087
		1088	atomic_inc(&dev_priv->irq_received);
		1089
		1090	while (true) {
		1091	iir = I915_READ(VLV_IIR);
		1092	gt_iir = I915_READ(GTIIR);
		1093	pm_iir = I915_READ(GEN6_PMIIR);
		1094
		1095	if (gt_iir == 0 && pm_iir == 0 && iir == 0)
		1096	goto out;
		1097
		1098	ret = IRQ_HANDLED;
		1099
		1100	snb_gt_irq_handler(dev, dev_priv, gt_iir);
		1101
		1102	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		1103	for_each_pipe(pipe) {
		1104	int reg = PIPESTAT(pipe);
		1105	pipe_stats[pipe] = I915_READ(reg);
		1106
		1107	/*
		1108	* Clear the PIPE*STAT regs before the IIR
		1109	*/
		1110	if (pipe_stats[pipe] & 0x8000ffff) {
		1111	if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
		1112	DRM_DEBUG_DRIVER("pipe %c underrun\n",
		1113	pipe_name(pipe));
		1114	I915_WRITE(reg, pipe_stats[pipe]);
		1115	}
		1116	}
		1117	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1118
		1119	#if 0
		1120	for_each_pipe(pipe) {
		1121	if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
		1122	drm_handle_vblank(dev, pipe);
		1123
		1124	if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
		1125	intel_prepare_page_flip(dev, pipe);
		1126	intel_finish_page_flip(dev, pipe);
		1127	}
		1128	}
		1129	#endif
		1130
		1131	/* Consume port. Then clear IIR or we'll miss events */
		1132	if (iir & I915_DISPLAY_PORT_INTERRUPT) {
		1133	u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3746	Serge	1134	u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3031	serge	1135
		1136	DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
		1137	hotplug_status);
4104	Serge	1138
		1139	intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
		1140
3031	serge	1141	I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
		1142	I915_READ(PORT_HOTPLUG_STAT);
		1143	}
		1144
3480	Serge	1145	if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
		1146	gmbus_irq_handler(dev);
3031	serge	1147
4126	Serge	1148	if (pm_iir)
		1149	gen6_rps_irq_handler(dev_priv, pm_iir);
3031	serge	1150
		1151	I915_WRITE(GTIIR, gt_iir);
		1152	I915_WRITE(GEN6_PMIIR, pm_iir);
		1153	I915_WRITE(VLV_IIR, iir);
		1154	}
		1155
		1156	out:
		1157	return ret;
		1158	}
		1159
		1160	static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
		1161	{
		1162	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1163	int pipe;
3746	Serge	1164	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
3031	serge	1165
4104	Serge	1166	intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
		1167
		1168	if (pch_iir & SDE_AUDIO_POWER_MASK) {
		1169	int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
		1170	SDE_AUDIO_POWER_SHIFT);
		1171	DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
		1172	port_name(port));
3746	Serge	1173	}
3031	serge	1174
3480	Serge	1175	if (pch_iir & SDE_AUX_MASK)
		1176	dp_aux_irq_handler(dev);
		1177
3031	serge	1178	if (pch_iir & SDE_GMBUS)
3480	Serge	1179	gmbus_irq_handler(dev);
3031	serge	1180
		1181	if (pch_iir & SDE_AUDIO_HDCP_MASK)
		1182	DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
		1183
		1184	if (pch_iir & SDE_AUDIO_TRANS_MASK)
		1185	DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
		1186
		1187	if (pch_iir & SDE_POISON)
		1188	DRM_ERROR("PCH poison interrupt\n");
		1189
		1190	if (pch_iir & SDE_FDI_MASK)
		1191	for_each_pipe(pipe)
		1192	DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
		1193	pipe_name(pipe),
		1194	I915_READ(FDI_RX_IIR(pipe)));
		1195
		1196	if (pch_iir & (SDE_TRANSB_CRC_DONE \| SDE_TRANSA_CRC_DONE))
		1197	DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
		1198
		1199	if (pch_iir & (SDE_TRANSB_CRC_ERR \| SDE_TRANSA_CRC_ERR))
		1200	DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
		1201
4104	Serge	1202	if (pch_iir & SDE_TRANSA_FIFO_UNDER)
		1203	if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
		1204	false))
		1205	DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
		1206
3031	serge	1207	if (pch_iir & SDE_TRANSB_FIFO_UNDER)
4104	Serge	1208	if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
		1209	false))
		1210	DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
3031	serge	1211	}
		1212
4104	Serge	1213	static void ivb_err_int_handler(struct drm_device *dev)
		1214	{
		1215	struct drm_i915_private *dev_priv = dev->dev_private;
		1216	u32 err_int = I915_READ(GEN7_ERR_INT);
		1217
		1218	if (err_int & ERR_INT_POISON)
		1219	DRM_ERROR("Poison interrupt\n");
		1220
		1221	if (err_int & ERR_INT_FIFO_UNDERRUN_A)
		1222	if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
		1223	DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
		1224
		1225	if (err_int & ERR_INT_FIFO_UNDERRUN_B)
		1226	if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
		1227	DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
		1228
		1229	if (err_int & ERR_INT_FIFO_UNDERRUN_C)
		1230	if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_C, false))
		1231	DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
		1232
		1233	I915_WRITE(GEN7_ERR_INT, err_int);
		1234	}
		1235
		1236	static void cpt_serr_int_handler(struct drm_device *dev)
		1237	{
		1238	struct drm_i915_private *dev_priv = dev->dev_private;
		1239	u32 serr_int = I915_READ(SERR_INT);
		1240
		1241	if (serr_int & SERR_INT_POISON)
		1242	DRM_ERROR("PCH poison interrupt\n");
		1243
		1244	if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
		1245	if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
		1246	false))
		1247	DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
		1248
		1249	if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
		1250	if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
		1251	false))
		1252	DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
		1253
		1254	if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
		1255	if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
		1256	false))
		1257	DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
		1258
		1259	I915_WRITE(SERR_INT, serr_int);
		1260	}
		1261
3031	serge	1262	static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
		1263	{
		1264	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1265	int pipe;
3746	Serge	1266	u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
3031	serge	1267
4104	Serge	1268	intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
		1269
		1270	if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
		1271	int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
		1272	SDE_AUDIO_POWER_SHIFT_CPT);
		1273	DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
		1274	port_name(port));
3746	Serge	1275	}
3031	serge	1276
		1277	if (pch_iir & SDE_AUX_MASK_CPT)
3480	Serge	1278	dp_aux_irq_handler(dev);
3031	serge	1279
		1280	if (pch_iir & SDE_GMBUS_CPT)
3480	Serge	1281	gmbus_irq_handler(dev);
3031	serge	1282
		1283	if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
		1284	DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
		1285
		1286	if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
		1287	DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
		1288
		1289	if (pch_iir & SDE_FDI_MASK_CPT)
		1290	for_each_pipe(pipe)
		1291	DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
		1292	pipe_name(pipe),
		1293	I915_READ(FDI_RX_IIR(pipe)));
		1294
4104	Serge	1295	if (pch_iir & SDE_ERROR_CPT)
		1296	cpt_serr_int_handler(dev);
3746	Serge	1297	}
3480	Serge	1298
4104	Serge	1299	static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
3031	serge	1300	{
4104	Serge	1301	struct drm_i915_private *dev_priv = dev->dev_private;
3031	serge	1302
3480	Serge	1303	if (de_iir & DE_AUX_CHANNEL_A)
		1304	dp_aux_irq_handler(dev);
		1305
3031	serge	1306	if (de_iir & DE_GSE)
4104	Serge	1307	intel_opregion_asle_intr(dev);
2351	Serge	1308
4126	Serge	1309	#if 0
3031	serge	1310	if (de_iir & DE_PIPEA_VBLANK)
		1311	drm_handle_vblank(dev, 0);
2351	Serge	1312
3031	serge	1313	if (de_iir & DE_PIPEB_VBLANK)
		1314	drm_handle_vblank(dev, 1);
4126	Serge	1315	#endif
2351	Serge	1316
4104	Serge	1317	if (de_iir & DE_POISON)
		1318	DRM_ERROR("Poison interrupt\n");
		1319
		1320	if (de_iir & DE_PIPEA_FIFO_UNDERRUN)
		1321	if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_A, false))
		1322	DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
		1323
		1324	if (de_iir & DE_PIPEB_FIFO_UNDERRUN)
		1325	if (intel_set_cpu_fifo_underrun_reporting(dev, PIPE_B, false))
		1326	DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
		1327	#if 0
3031	serge	1328	if (de_iir & DE_PLANEA_FLIP_DONE) {
		1329	intel_prepare_page_flip(dev, 0);
		1330	intel_finish_page_flip_plane(dev, 0);
		1331	}
2351	Serge	1332
3031	serge	1333	if (de_iir & DE_PLANEB_FLIP_DONE) {
		1334	intel_prepare_page_flip(dev, 1);
		1335	intel_finish_page_flip_plane(dev, 1);
		1336	}
		1337	#endif
2351	Serge	1338
3031	serge	1339	/* check event from PCH */
		1340	if (de_iir & DE_PCH_EVENT) {
3480	Serge	1341	u32 pch_iir = I915_READ(SDEIIR);
		1342
3031	serge	1343	if (HAS_PCH_CPT(dev))
		1344	cpt_irq_handler(dev, pch_iir);
		1345	else
		1346	ibx_irq_handler(dev, pch_iir);
3480	Serge	1347
		1348	/* should clear PCH hotplug event before clear CPU irq */
		1349	I915_WRITE(SDEIIR, pch_iir);
3031	serge	1350	}
4104	Serge	1351
3031	serge	1352	if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
4104	Serge	1353	ironlake_rps_change_irq_handler(dev);
2351	Serge	1354	}
		1355
4104	Serge	1356	static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
3031	serge	1357	{
		1358	struct drm_i915_private *dev_priv = dev->dev_private;
3746	Serge	1359	int i;
2351	Serge	1360
4126	Serge	1361	if (de_iir & DE_ERR_INT_IVB)
		1362	ivb_err_int_handler(dev);
2351	Serge	1363
4104	Serge	1364	if (de_iir & DE_AUX_CHANNEL_A_IVB)
		1365	dp_aux_irq_handler(dev);
3031	serge	1366
4104	Serge	1367	if (de_iir & DE_GSE_IVB)
		1368	intel_opregion_asle_intr(dev);
		1369	#if 0
		1370	for (i = 0; i < 3; i++) {
		1371	if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
		1372	drm_handle_vblank(dev, i);
		1373	if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
		1374	intel_prepare_page_flip(dev, i);
		1375	intel_finish_page_flip_plane(dev, i);
3031	serge	1376	}
		1377	}
4104	Serge	1378	#endif
3031	serge	1379
4104	Serge	1380	/* check event from PCH */
		1381	if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
		1382	u32 pch_iir = I915_READ(SDEIIR);
3031	serge	1383
4104	Serge	1384	cpt_irq_handler(dev, pch_iir);
3031	serge	1385
4104	Serge	1386	/* clear PCH hotplug event before clear CPU irq */
		1387	I915_WRITE(SDEIIR, pch_iir);
3031	serge	1388	}
		1389	}
		1390
4104	Serge	1391	static irqreturn_t ironlake_irq_handler(int irq, void *arg)
3031	serge	1392	{
4104	Serge	1393	struct drm_device dev = (struct drm_device ) arg;
		1394	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1395	u32 de_iir, gt_iir, de_ier, sde_ier = 0;
		1396	irqreturn_t ret = IRQ_NONE;
		1397	bool err_int_reenable = false;
3031	serge	1398
4104	Serge	1399	atomic_inc(&dev_priv->irq_received);
3031	serge	1400
4104	Serge	1401	/* We get interrupts on unclaimed registers, so check for this before we
		1402	* do any I915_{READ,WRITE}. */
		1403	intel_uncore_check_errors(dev);
3031	serge	1404
4104	Serge	1405	/* disable master interrupt before clearing iir */
		1406	de_ier = I915_READ(DEIER);
		1407	I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
		1408	POSTING_READ(DEIER);
3031	serge	1409
4104	Serge	1410	/* Disable south interrupts. We'll only write to SDEIIR once, so further
		1411	* interrupts will will be stored on its back queue, and then we'll be
		1412	* able to process them after we restore SDEIER (as soon as we restore
		1413	* it, we'll get an interrupt if SDEIIR still has something to process
		1414	* due to its back queue). */
		1415	if (!HAS_PCH_NOP(dev)) {
		1416	sde_ier = I915_READ(SDEIER);
		1417	I915_WRITE(SDEIER, 0);
		1418	POSTING_READ(SDEIER);
3031	serge	1419	}
		1420
4104	Serge	1421	/* On Haswell, also mask ERR_INT because we don't want to risk
		1422	* generating "unclaimed register" interrupts from inside the interrupt
		1423	* handler. */
		1424	if (IS_HASWELL(dev)) {
		1425	spin_lock(&dev_priv->irq_lock);
		1426	err_int_reenable = ~dev_priv->irq_mask & DE_ERR_INT_IVB;
		1427	if (err_int_reenable)
		1428	ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
		1429	spin_unlock(&dev_priv->irq_lock);
3031	serge	1430	}
		1431
4104	Serge	1432	gt_iir = I915_READ(GTIIR);
		1433	if (gt_iir) {
		1434	if (INTEL_INFO(dev)->gen >= 6)
		1435	snb_gt_irq_handler(dev, dev_priv, gt_iir);
		1436	else
		1437	ilk_gt_irq_handler(dev, dev_priv, gt_iir);
		1438	I915_WRITE(GTIIR, gt_iir);
		1439	ret = IRQ_HANDLED;
3031	serge	1440	}
		1441
4104	Serge	1442	de_iir = I915_READ(DEIIR);
		1443	if (de_iir) {
		1444	if (INTEL_INFO(dev)->gen >= 7)
		1445	ivb_display_irq_handler(dev, de_iir);
		1446	else
		1447	ilk_display_irq_handler(dev, de_iir);
		1448	I915_WRITE(DEIIR, de_iir);
		1449	ret = IRQ_HANDLED;
3480	Serge	1450	}
		1451
4104	Serge	1452	if (INTEL_INFO(dev)->gen >= 6) {
		1453	u32 pm_iir = I915_READ(GEN6_PMIIR);
		1454	if (pm_iir) {
		1455	gen6_rps_irq_handler(dev_priv, pm_iir);
		1456	I915_WRITE(GEN6_PMIIR, pm_iir);
		1457	ret = IRQ_HANDLED;
3031	serge	1458	}
		1459	}
		1460
4104	Serge	1461	if (err_int_reenable) {
		1462	spin_lock(&dev_priv->irq_lock);
		1463	if (ivb_can_enable_err_int(dev))
		1464	ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
		1465	spin_unlock(&dev_priv->irq_lock);
3031	serge	1466	}
		1467
4104	Serge	1468	I915_WRITE(DEIER, de_ier);
		1469	POSTING_READ(DEIER);
		1470	if (!HAS_PCH_NOP(dev)) {
		1471	I915_WRITE(SDEIER, sde_ier);
		1472	POSTING_READ(SDEIER);
3031	serge	1473	}
		1474
4104	Serge	1475	return ret;
3031	serge	1476	}
		1477
4104	Serge	1478	static void i915_error_wake_up(struct drm_i915_private *dev_priv,
		1479	bool reset_completed)
3746	Serge	1480	{
3031	serge	1481	struct intel_ring_buffer *ring;
4104	Serge	1482	int i;
3031	serge	1483
4104	Serge	1484	/*
		1485	* Notify all waiters for GPU completion events that reset state has
		1486	* been changed, and that they need to restart their wait after
		1487	* checking for potential errors (and bail out to drop locks if there is
		1488	* a gpu reset pending so that i915_error_work_func can acquire them).
		1489	*/
3031	serge	1490
4104	Serge	1491	/* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
		1492	for_each_ring(ring, dev_priv, i)
		1493	wake_up_all(&ring->irq_queue);
3031	serge	1494
		1495
4104	Serge	1496	/*
		1497	* Signal tasks blocked in i915_gem_wait_for_error that the pending
		1498	* reset state is cleared.
		1499	*/
		1500	if (reset_completed)
		1501	wake_up_all(&dev_priv->gpu_error.reset_queue);
3031	serge	1502	}
		1503
		1504	/**
4104	Serge	1505	* i915_error_work_func - do process context error handling work
		1506	* @work: work struct
3031	serge	1507	*
4104	Serge	1508	* Fire an error uevent so userspace can see that a hang or error
		1509	* was detected.
3031	serge	1510	*/
4104	Serge	1511	static void i915_error_work_func(struct work_struct *work)
3031	serge	1512	{
4104	Serge	1513	struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
		1514	work);
		1515	drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
		1516	gpu_error);
		1517	struct drm_device *dev = dev_priv->dev;
		1518	char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
		1519	char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
		1520	char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
		1521	int ret;
3031	serge	1522
4104	Serge	1523	/*
		1524	* Note that there's only one work item which does gpu resets, so we
		1525	* need not worry about concurrent gpu resets potentially incrementing
		1526	* error->reset_counter twice. We only need to take care of another
		1527	* racing irq/hangcheck declaring the gpu dead for a second time. A
		1528	* quick check for that is good enough: schedule_work ensures the
		1529	* correct ordering between hang detection and this work item, and since
		1530	* the reset in-progress bit is only ever set by code outside of this
		1531	* work we don't need to worry about any other races.
		1532	*/
		1533	if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
		1534	DRM_DEBUG_DRIVER("resetting chip\n");
3031	serge	1535
4104	Serge	1536	/*
		1537	* All state reset _must_ be completed before we update the
		1538	* reset counter, for otherwise waiters might miss the reset
		1539	* pending state and not properly drop locks, resulting in
		1540	* deadlocks with the reset work.
		1541	*/
4126	Serge	1542	// ret = i915_reset(dev);
3031	serge	1543
4126	Serge	1544	// intel_display_handle_reset(dev);
3031	serge	1545
4104	Serge	1546	if (ret == 0) {
		1547	/*
		1548	* After all the gem state is reset, increment the reset
		1549	* counter and wake up everyone waiting for the reset to
		1550	* complete.
		1551	*
		1552	* Since unlock operations are a one-sided barrier only,
		1553	* we need to insert a barrier here to order any seqno
		1554	* updates before
		1555	* the counter increment.
		1556	*/
		1557	atomic_inc(&dev_priv->gpu_error.reset_counter);
3031	serge	1558
4104	Serge	1559	} else {
		1560	atomic_set(&error->reset_counter, I915_WEDGED);
3031	serge	1561	}
		1562
4104	Serge	1563	/*
		1564	* Note: The wake_up also serves as a memory barrier so that
		1565	* waiters see the update value of the reset counter atomic_t.
		1566	*/
		1567	i915_error_wake_up(dev_priv, true);
3031	serge	1568	}
		1569	}
		1570
		1571	static void i915_report_and_clear_eir(struct drm_device *dev)
		1572	{
		1573	struct drm_i915_private *dev_priv = dev->dev_private;
		1574	uint32_t instdone[I915_NUM_INSTDONE_REG];
		1575	u32 eir = I915_READ(EIR);
		1576	int pipe, i;
		1577
		1578	if (!eir)
		1579	return;
		1580
		1581	pr_err("render error detected, EIR: 0x%08x\n", eir);
		1582
		1583	i915_get_extra_instdone(dev, instdone);
		1584
		1585	if (IS_G4X(dev)) {
		1586	if (eir & (GM45_ERROR_MEM_PRIV \| GM45_ERROR_CP_PRIV)) {
		1587	u32 ipeir = I915_READ(IPEIR_I965);
		1588
		1589	pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
		1590	pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
		1591	for (i = 0; i < ARRAY_SIZE(instdone); i++)
		1592	pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
		1593	pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
		1594	pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
		1595	I915_WRITE(IPEIR_I965, ipeir);
		1596	POSTING_READ(IPEIR_I965);
		1597	}
		1598	if (eir & GM45_ERROR_PAGE_TABLE) {
		1599	u32 pgtbl_err = I915_READ(PGTBL_ER);
		1600	pr_err("page table error\n");
		1601	pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
		1602	I915_WRITE(PGTBL_ER, pgtbl_err);
		1603	POSTING_READ(PGTBL_ER);
		1604	}
		1605	}
		1606
		1607	if (!IS_GEN2(dev)) {
		1608	if (eir & I915_ERROR_PAGE_TABLE) {
		1609	u32 pgtbl_err = I915_READ(PGTBL_ER);
		1610	pr_err("page table error\n");
		1611	pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
		1612	I915_WRITE(PGTBL_ER, pgtbl_err);
		1613	POSTING_READ(PGTBL_ER);
		1614	}
		1615	}
		1616
		1617	if (eir & I915_ERROR_MEMORY_REFRESH) {
		1618	pr_err("memory refresh error:\n");
		1619	for_each_pipe(pipe)
		1620	pr_err("pipe %c stat: 0x%08x\n",
		1621	pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
		1622	/* pipestat has already been acked */
		1623	}
		1624	if (eir & I915_ERROR_INSTRUCTION) {
		1625	pr_err("instruction error\n");
		1626	pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
		1627	for (i = 0; i < ARRAY_SIZE(instdone); i++)
		1628	pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
		1629	if (INTEL_INFO(dev)->gen < 4) {
		1630	u32 ipeir = I915_READ(IPEIR);
		1631
		1632	pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
		1633	pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
		1634	pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
		1635	I915_WRITE(IPEIR, ipeir);
		1636	POSTING_READ(IPEIR);
		1637	} else {
		1638	u32 ipeir = I915_READ(IPEIR_I965);
		1639
		1640	pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
		1641	pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
		1642	pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
		1643	pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
		1644	I915_WRITE(IPEIR_I965, ipeir);
		1645	POSTING_READ(IPEIR_I965);
		1646	}
		1647	}
		1648
		1649	I915_WRITE(EIR, eir);
		1650	POSTING_READ(EIR);
		1651	eir = I915_READ(EIR);
		1652	if (eir) {
		1653	/*
		1654	* some errors might have become stuck,
		1655	* mask them.
		1656	*/
		1657	DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
		1658	I915_WRITE(EMR, I915_READ(EMR) \| eir);
		1659	I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
		1660	}
		1661	}
		1662
		1663	/**
		1664	* i915_handle_error - handle an error interrupt
		1665	* @dev: drm device
		1666	*
		1667	* Do some basic checking of regsiter state at error interrupt time and
		1668	* dump it to the syslog. Also call i915_capture_error_state() to make
		1669	* sure we get a record and make it available in debugfs. Fire a uevent
		1670	* so userspace knows something bad happened (should trigger collection
		1671	* of a ring dump etc.).
		1672	*/
		1673	void i915_handle_error(struct drm_device *dev, bool wedged)
		1674	{
		1675	struct drm_i915_private *dev_priv = dev->dev_private;
		1676
4126	Serge	1677	// i915_capture_error_state(dev);
3031	serge	1678	i915_report_and_clear_eir(dev);
		1679
		1680	if (wedged) {
3480	Serge	1681	atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
		1682	&dev_priv->gpu_error.reset_counter);
3031	serge	1683
		1684	/*
4104	Serge	1685	* Wakeup waiting processes so that the reset work function
		1686	* i915_error_work_func doesn't deadlock trying to grab various
		1687	* locks. By bumping the reset counter first, the woken
		1688	* processes will see a reset in progress and back off,
		1689	* releasing their locks and then wait for the reset completion.
		1690	* We must do this for _all_ gpu waiters that might hold locks
		1691	* that the reset work needs to acquire.
		1692	*
		1693	* Note: The wake_up serves as the required memory barrier to
		1694	* ensure that the waiters see the updated value of the reset
		1695	* counter atomic_t.
3031	serge	1696	*/
4104	Serge	1697	i915_error_wake_up(dev_priv, false);
3031	serge	1698	}
		1699
4104	Serge	1700	/*
		1701	* Our reset work can grab modeset locks (since it needs to reset the
		1702	* state of outstanding pagelips). Hence it must not be run on our own
		1703	* dev-priv->wq work queue for otherwise the flush_work in the pageflip
		1704	* code will deadlock.
		1705	*/
		1706	schedule_work(&dev_priv->gpu_error.work);
3031	serge	1707	}
		1708
4126	Serge	1709	#if 0
3746	Serge	1710	static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
3031	serge	1711	{
		1712	drm_i915_private_t *dev_priv = dev->dev_private;
		1713	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
		1714	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
		1715	struct drm_i915_gem_object *obj;
		1716	struct intel_unpin_work *work;
		1717	unsigned long flags;
		1718	bool stall_detected;
		1719
		1720	/* Ignore early vblank irqs */
		1721	if (intel_crtc == NULL)
		1722	return;
		1723
		1724	spin_lock_irqsave(&dev->event_lock, flags);
		1725	work = intel_crtc->unpin_work;
		1726
3243	Serge	1727	if (work == NULL \|\|
		1728	atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE \|\|
		1729	!work->enable_stall_check) {
3031	serge	1730	/* Either the pending flip IRQ arrived, or we're too early. Don't check */
		1731	spin_unlock_irqrestore(&dev->event_lock, flags);
		1732	return;
		1733	}
		1734
		1735	/* Potential stall - if we see that the flip has happened, assume a missed interrupt */
		1736	obj = work->pending_flip_obj;
		1737	if (INTEL_INFO(dev)->gen >= 4) {
		1738	int dspsurf = DSPSURF(intel_crtc->plane);
		1739	stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
4104	Serge	1740	i915_gem_obj_ggtt_offset(obj);
3031	serge	1741	} else {
		1742	int dspaddr = DSPADDR(intel_crtc->plane);
4104	Serge	1743	stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
3031	serge	1744	crtc->y * crtc->fb->pitches[0] +
		1745	crtc->x * crtc->fb->bits_per_pixel/8);
		1746	}
		1747
		1748	spin_unlock_irqrestore(&dev->event_lock, flags);
		1749
		1750	if (stall_detected) {
		1751	DRM_DEBUG_DRIVER("Pageflip stall detected\n");
		1752	intel_prepare_page_flip(dev, intel_crtc->plane);
		1753	}
		1754	}
		1755
		1756	#endif
		1757
		1758	/* Called from drm generic code, passed 'crtc' which
		1759	* we use as a pipe index
		1760	*/
		1761	static int i915_enable_vblank(struct drm_device *dev, int pipe)
		1762	{
		1763	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1764	unsigned long irqflags;
		1765
		1766	if (!i915_pipe_enabled(dev, pipe))
		1767	return -EINVAL;
		1768
		1769	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		1770	if (INTEL_INFO(dev)->gen >= 4)
		1771	i915_enable_pipestat(dev_priv, pipe,
		1772	PIPE_START_VBLANK_INTERRUPT_ENABLE);
		1773	else
		1774	i915_enable_pipestat(dev_priv, pipe,
		1775	PIPE_VBLANK_INTERRUPT_ENABLE);
		1776
		1777	/* maintain vblank delivery even in deep C-states */
		1778	if (dev_priv->info->gen == 3)
		1779	I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
		1780	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1781
		1782	return 0;
		1783	}
		1784
		1785	static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
		1786	{
		1787	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1788	unsigned long irqflags;
4104	Serge	1789	uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
		1790	DE_PIPE_VBLANK_ILK(pipe);
3031	serge	1791
		1792	if (!i915_pipe_enabled(dev, pipe))
		1793	return -EINVAL;
		1794
		1795	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4104	Serge	1796	ironlake_enable_display_irq(dev_priv, bit);
3031	serge	1797	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1798
		1799	return 0;
		1800	}
		1801
		1802	static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
		1803	{
		1804	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1805	unsigned long irqflags;
		1806	u32 imr;
		1807
		1808	if (!i915_pipe_enabled(dev, pipe))
		1809	return -EINVAL;
		1810
		1811	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		1812	imr = I915_READ(VLV_IMR);
		1813	if (pipe == 0)
		1814	imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
		1815	else
		1816	imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
		1817	I915_WRITE(VLV_IMR, imr);
		1818	i915_enable_pipestat(dev_priv, pipe,
		1819	PIPE_START_VBLANK_INTERRUPT_ENABLE);
		1820	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1821
		1822	return 0;
		1823	}
		1824
		1825	/* Called from drm generic code, passed 'crtc' which
		1826	* we use as a pipe index
		1827	*/
		1828	static void i915_disable_vblank(struct drm_device *dev, int pipe)
		1829	{
		1830	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1831	unsigned long irqflags;
		1832
		1833	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		1834	if (dev_priv->info->gen == 3)
		1835	I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
		1836
		1837	i915_disable_pipestat(dev_priv, pipe,
		1838	PIPE_VBLANK_INTERRUPT_ENABLE \|
		1839	PIPE_START_VBLANK_INTERRUPT_ENABLE);
		1840	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1841	}
		1842
		1843	static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
		1844	{
		1845	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1846	unsigned long irqflags;
4104	Serge	1847	uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
		1848	DE_PIPE_VBLANK_ILK(pipe);
3031	serge	1849
		1850	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4104	Serge	1851	ironlake_disable_display_irq(dev_priv, bit);
3031	serge	1852	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1853	}
		1854
		1855	static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
		1856	{
		1857	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		1858	unsigned long irqflags;
		1859	u32 imr;
		1860
		1861	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		1862	i915_disable_pipestat(dev_priv, pipe,
		1863	PIPE_START_VBLANK_INTERRUPT_ENABLE);
		1864	imr = I915_READ(VLV_IMR);
		1865	if (pipe == 0)
		1866	imr \|= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
		1867	else
		1868	imr \|= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
		1869	I915_WRITE(VLV_IMR, imr);
		1870	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		1871	}
		1872
		1873	static u32
		1874	ring_last_seqno(struct intel_ring_buffer *ring)
		1875	{
		1876	return list_entry(ring->request_list.prev,
		1877	struct drm_i915_gem_request, list)->seqno;
		1878	}
4104	Serge	1879
		1880	static bool
		1881	ring_idle(struct intel_ring_buffer *ring, u32 seqno)
2351	Serge	1882	{
4104	Serge	1883	return (list_empty(&ring->request_list) \|\|
		1884	i915_seqno_passed(seqno, ring_last_seqno(ring)));
		1885	}
2351	Serge	1886
4104	Serge	1887	static struct intel_ring_buffer *
		1888	semaphore_waits_for(struct intel_ring_buffer ring, u32 seqno)
		1889	{
		1890	struct drm_i915_private *dev_priv = ring->dev->dev_private;
		1891	u32 cmd, ipehr, acthd, acthd_min;
2351	Serge	1892
4104	Serge	1893	ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
		1894	if ((ipehr & ~(0x3 << 16)) !=
		1895	(MI_SEMAPHORE_MBOX \| MI_SEMAPHORE_COMPARE \| MI_SEMAPHORE_REGISTER))
		1896	return NULL;
2351	Serge	1897
4104	Serge	1898	/* ACTHD is likely pointing to the dword after the actual command,
		1899	* so scan backwards until we find the MBOX.
		1900	*/
		1901	acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
		1902	acthd_min = max((int)acthd - 3 * 4, 0);
		1903	do {
		1904	cmd = ioread32(ring->virtual_start + acthd);
		1905	if (cmd == ipehr)
		1906	break;
2351	Serge	1907
4104	Serge	1908	acthd -= 4;
		1909	if (acthd < acthd_min)
		1910	return NULL;
		1911	} while (1);
2351	Serge	1912
4104	Serge	1913	*seqno = ioread32(ring->virtual_start+acthd+4)+1;
		1914	return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
		1915	}
2351	Serge	1916
4104	Serge	1917	static int semaphore_passed(struct intel_ring_buffer *ring)
		1918	{
		1919	struct drm_i915_private *dev_priv = ring->dev->dev_private;
		1920	struct intel_ring_buffer *signaller;
		1921	u32 seqno, ctl;
		1922
		1923	ring->hangcheck.deadlock = true;
		1924
		1925	signaller = semaphore_waits_for(ring, &seqno);
		1926	if (signaller == NULL \|\| signaller->hangcheck.deadlock)
		1927	return -1;
		1928
		1929	/* cursory check for an unkickable deadlock */
		1930	ctl = I915_READ_CTL(signaller);
		1931	if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
		1932	return -1;
		1933
		1934	return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
		1935	}
		1936
		1937	static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
		1938	{
		1939	struct intel_ring_buffer *ring;
		1940	int i;
		1941
		1942	for_each_ring(ring, dev_priv, i)
		1943	ring->hangcheck.deadlock = false;
		1944	}
		1945
		1946	static enum intel_ring_hangcheck_action
		1947	ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
		1948	{
		1949	struct drm_device *dev = ring->dev;
		1950	struct drm_i915_private *dev_priv = dev->dev_private;
		1951	u32 tmp;
		1952
		1953	if (ring->hangcheck.acthd != acthd)
		1954	return HANGCHECK_ACTIVE;
		1955
		1956	if (IS_GEN2(dev))
		1957	return HANGCHECK_HUNG;
		1958
		1959	/* Is the chip hanging on a WAIT_FOR_EVENT?
		1960	* If so we can simply poke the RB_WAIT bit
		1961	* and break the hang. This should work on
		1962	* all but the second generation chipsets.
		1963	*/
		1964	tmp = I915_READ_CTL(ring);
		1965	if (tmp & RING_WAIT) {
		1966	DRM_ERROR("Kicking stuck wait on %s\n",
		1967	ring->name);
		1968	I915_WRITE_CTL(ring, tmp);
		1969	return HANGCHECK_KICK;
		1970	}
		1971
		1972	if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
		1973	switch (semaphore_passed(ring)) {
		1974	default:
		1975	return HANGCHECK_HUNG;
		1976	case 1:
		1977	DRM_ERROR("Kicking stuck semaphore on %s\n",
		1978	ring->name);
		1979	I915_WRITE_CTL(ring, tmp);
		1980	return HANGCHECK_KICK;
		1981	case 0:
		1982	return HANGCHECK_WAIT;
		1983	}
		1984	}
		1985
		1986	return HANGCHECK_HUNG;
		1987	}
		1988
		1989	/**
		1990	* This is called when the chip hasn't reported back with completed
		1991	* batchbuffers in a long time. We keep track per ring seqno progress and
		1992	* if there are no progress, hangcheck score for that ring is increased.
		1993	* Further, acthd is inspected to see if the ring is stuck. On stuck case
		1994	* we kick the ring. If we see no progress on three subsequent calls
		1995	* we assume chip is wedged and try to fix it by resetting the chip.
		1996	*/
		1997	static void i915_hangcheck_elapsed(unsigned long data)
		1998	{
		1999	struct drm_device dev = (struct drm_device )data;
		2000	drm_i915_private_t *dev_priv = dev->dev_private;
		2001	struct intel_ring_buffer *ring;
		2002	int i;
		2003	int busy_count = 0, rings_hung = 0;
		2004	bool stuck[I915_NUM_RINGS] = { 0 };
		2005	#define BUSY 1
		2006	#define KICK 5
		2007	#define HUNG 20
		2008	#define FIRE 30
		2009
		2010	if (!i915_enable_hangcheck)
		2011	return;
		2012
		2013	for_each_ring(ring, dev_priv, i) {
		2014	u32 seqno, acthd;
		2015	bool busy = true;
		2016
		2017	semaphore_clear_deadlocks(dev_priv);
		2018
		2019	seqno = ring->get_seqno(ring, false);
		2020	acthd = intel_ring_get_active_head(ring);
		2021
		2022	if (ring->hangcheck.seqno == seqno) {
		2023	if (ring_idle(ring, seqno)) {
		2024	// if (waitqueue_active(&ring->irq_queue)) {
		2025	/* Issue a wake-up to catch stuck h/w. */
		2026	// DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
		2027	// ring->name);
		2028	// wake_up_all(&ring->irq_queue);
		2029	// } else
		2030	busy = false;
		2031	} else {
		2032	/* We always increment the hangcheck score
		2033	* if the ring is busy and still processing
		2034	* the same request, so that no single request
		2035	* can run indefinitely (such as a chain of
		2036	* batches). The only time we do not increment
		2037	* the hangcheck score on this ring, if this
		2038	* ring is in a legitimate wait for another
		2039	* ring. In that case the waiting ring is a
		2040	* victim and we want to be sure we catch the
		2041	* right culprit. Then every time we do kick
		2042	* the ring, add a small increment to the
		2043	* score so that we can catch a batch that is
		2044	* being repeatedly kicked and so responsible
		2045	* for stalling the machine.
		2046	*/
		2047	ring->hangcheck.action = ring_stuck(ring,
		2048	acthd);
		2049
		2050	switch (ring->hangcheck.action) {
		2051	case HANGCHECK_WAIT:
		2052	break;
		2053	case HANGCHECK_ACTIVE:
		2054	ring->hangcheck.score += BUSY;
		2055	break;
		2056	case HANGCHECK_KICK:
		2057	ring->hangcheck.score += KICK;
		2058	break;
		2059	case HANGCHECK_HUNG:
		2060	ring->hangcheck.score += HUNG;
		2061	stuck[i] = true;
		2062	break;
		2063	}
		2064	}
		2065	} else {
		2066	/* Gradually reduce the count so that we catch DoS
		2067	* attempts across multiple batches.
		2068	*/
		2069	if (ring->hangcheck.score > 0)
		2070	ring->hangcheck.score--;
		2071	}
		2072
		2073	ring->hangcheck.seqno = seqno;
		2074	ring->hangcheck.acthd = acthd;
		2075	busy_count += busy;
		2076	}
		2077
		2078	for_each_ring(ring, dev_priv, i) {
		2079	if (ring->hangcheck.score > FIRE) {
		2080	DRM_INFO("%s on %s\n",
		2081	stuck[i] ? "stuck" : "no progress",
		2082	ring->name);
		2083	rings_hung++;
		2084	}
		2085	}
		2086
		2087	// if (rings_hung)
		2088	// return i915_handle_error(dev, true);
		2089
		2090	}
		2091
		2092	static void ibx_irq_preinstall(struct drm_device *dev)
		2093	{
		2094	struct drm_i915_private *dev_priv = dev->dev_private;
		2095
3746	Serge	2096	if (HAS_PCH_NOP(dev))
		2097	return;
		2098
4104	Serge	2099	/* south display irq */
		2100	I915_WRITE(SDEIMR, 0xffffffff);
3746	Serge	2101	/*
		2102	* SDEIER is also touched by the interrupt handler to work around missed
		2103	* PCH interrupts. Hence we can't update it after the interrupt handler
		2104	* is enabled - instead we unconditionally enable all PCH interrupt
		2105	* sources here, but then only unmask them as needed with SDEIMR.
		2106	*/
		2107	I915_WRITE(SDEIER, 0xffffffff);
4104	Serge	2108	POSTING_READ(SDEIER);
2351	Serge	2109	}
		2110
4104	Serge	2111	static void gen5_gt_irq_preinstall(struct drm_device *dev)
		2112	{
		2113	struct drm_i915_private *dev_priv = dev->dev_private;
		2114
		2115	/* and GT */
		2116	I915_WRITE(GTIMR, 0xffffffff);
		2117	I915_WRITE(GTIER, 0x0);
		2118	POSTING_READ(GTIER);
		2119
		2120	if (INTEL_INFO(dev)->gen >= 6) {
		2121	/* and PM */
		2122	I915_WRITE(GEN6_PMIMR, 0xffffffff);
		2123	I915_WRITE(GEN6_PMIER, 0x0);
		2124	POSTING_READ(GEN6_PMIER);
		2125	}
		2126	}
		2127
		2128	/* drm_dma.h hooks
		2129	*/
		2130	static void ironlake_irq_preinstall(struct drm_device *dev)
		2131	{
		2132	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2133
		2134	atomic_set(&dev_priv->irq_received, 0);
		2135
		2136	I915_WRITE(HWSTAM, 0xeffe);
		2137
		2138	I915_WRITE(DEIMR, 0xffffffff);
		2139	I915_WRITE(DEIER, 0x0);
		2140	POSTING_READ(DEIER);
		2141
		2142	gen5_gt_irq_preinstall(dev);
		2143
		2144	ibx_irq_preinstall(dev);
		2145	}
		2146
3031	serge	2147	static void valleyview_irq_preinstall(struct drm_device *dev)
		2148	{
		2149	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2150	int pipe;
		2151
		2152	atomic_set(&dev_priv->irq_received, 0);
		2153
		2154	/* VLV magic */
		2155	I915_WRITE(VLV_IMR, 0);
		2156	I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
		2157	I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
		2158	I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
		2159
		2160	/* and GT */
		2161	I915_WRITE(GTIIR, I915_READ(GTIIR));
		2162	I915_WRITE(GTIIR, I915_READ(GTIIR));
		2163
4104	Serge	2164	gen5_gt_irq_preinstall(dev);
		2165
3031	serge	2166	I915_WRITE(DPINVGTT, 0xff);
		2167
		2168	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2169	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		2170	for_each_pipe(pipe)
		2171	I915_WRITE(PIPESTAT(pipe), 0xffff);
		2172	I915_WRITE(VLV_IIR, 0xffffffff);
		2173	I915_WRITE(VLV_IMR, 0xffffffff);
		2174	I915_WRITE(VLV_IER, 0x0);
		2175	POSTING_READ(VLV_IER);
		2176	}
		2177
3746	Serge	2178	static void ibx_hpd_irq_setup(struct drm_device *dev)
		2179	{
		2180	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2181	struct drm_mode_config *mode_config = &dev->mode_config;
		2182	struct intel_encoder *intel_encoder;
4104	Serge	2183	u32 hotplug_irqs, hotplug, enabled_irqs = 0;
3746	Serge	2184
		2185	if (HAS_PCH_IBX(dev)) {
4104	Serge	2186	hotplug_irqs = SDE_HOTPLUG_MASK;
3746	Serge	2187	list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
		2188	if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
4104	Serge	2189	enabled_irqs \|= hpd_ibx[intel_encoder->hpd_pin];
3746	Serge	2190	} else {
4104	Serge	2191	hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3746	Serge	2192	list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
		2193	if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
4104	Serge	2194	enabled_irqs \|= hpd_cpt[intel_encoder->hpd_pin];
3746	Serge	2195	}
		2196
4104	Serge	2197	ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3746	Serge	2198
		2199	/*
2351	Serge	2200	* Enable digital hotplug on the PCH, and configure the DP short pulse
		2201	* duration to 2ms (which is the minimum in the Display Port spec)
		2202	*
		2203	* This register is the same on all known PCH chips.
		2204	*/
		2205	hotplug = I915_READ(PCH_PORT_HOTPLUG);
		2206	hotplug &= ~(PORTD_PULSE_DURATION_MASK\|PORTC_PULSE_DURATION_MASK\|PORTB_PULSE_DURATION_MASK);
		2207	hotplug \|= PORTD_HOTPLUG_ENABLE \| PORTD_PULSE_DURATION_2ms;
		2208	hotplug \|= PORTC_HOTPLUG_ENABLE \| PORTC_PULSE_DURATION_2ms;
		2209	hotplug \|= PORTB_HOTPLUG_ENABLE \| PORTB_PULSE_DURATION_2ms;
		2210	I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
		2211	}
		2212
3480	Serge	2213	static void ibx_irq_postinstall(struct drm_device *dev)
		2214	{
		2215	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2216	u32 mask;
		2217
3746	Serge	2218	if (HAS_PCH_NOP(dev))
		2219	return;
		2220
4104	Serge	2221	if (HAS_PCH_IBX(dev)) {
		2222	mask = SDE_GMBUS \| SDE_AUX_MASK \| SDE_TRANSB_FIFO_UNDER \|
		2223	SDE_TRANSA_FIFO_UNDER \| SDE_POISON;
		2224	} else {
		2225	mask = SDE_GMBUS_CPT \| SDE_AUX_MASK_CPT \| SDE_ERROR_CPT;
		2226
		2227	I915_WRITE(SERR_INT, I915_READ(SERR_INT));
		2228	}
		2229
3480	Serge	2230	I915_WRITE(SDEIIR, I915_READ(SDEIIR));
		2231	I915_WRITE(SDEIMR, ~mask);
		2232	}
		2233
4104	Serge	2234	static void gen5_gt_irq_postinstall(struct drm_device *dev)
2351	Serge	2235	{
4104	Serge	2236	struct drm_i915_private *dev_priv = dev->dev_private;
		2237	u32 pm_irqs, gt_irqs;
2351	Serge	2238
4104	Serge	2239	pm_irqs = gt_irqs = 0;
2351	Serge	2240
		2241	dev_priv->gt_irq_mask = ~0;
4104	Serge	2242	if (HAS_L3_GPU_CACHE(dev)) {
		2243	/* L3 parity interrupt is always unmasked. */
		2244	dev_priv->gt_irq_mask = ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
		2245	gt_irqs \|= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
		2246	}
2351	Serge	2247
4104	Serge	2248	gt_irqs \|= GT_RENDER_USER_INTERRUPT;
		2249	if (IS_GEN5(dev)) {
		2250	gt_irqs \|= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT \|
		2251	ILK_BSD_USER_INTERRUPT;
		2252	} else {
		2253	gt_irqs \|= GT_BLT_USER_INTERRUPT \| GT_BSD_USER_INTERRUPT;
		2254	}
2351	Serge	2255
4104	Serge	2256	I915_WRITE(GTIIR, I915_READ(GTIIR));
		2257	I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
		2258	I915_WRITE(GTIER, gt_irqs);
2351	Serge	2259	POSTING_READ(GTIER);
		2260
4104	Serge	2261	if (INTEL_INFO(dev)->gen >= 6) {
		2262	pm_irqs \|= GEN6_PM_RPS_EVENTS;
2351	Serge	2263
4104	Serge	2264	if (HAS_VEBOX(dev))
		2265	pm_irqs \|= PM_VEBOX_USER_INTERRUPT;
		2266
		2267	dev_priv->pm_irq_mask = 0xffffffff;
		2268	I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
		2269	I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
		2270	I915_WRITE(GEN6_PMIER, pm_irqs);
		2271	POSTING_READ(GEN6_PMIER);
2351	Serge	2272	}
		2273	}
		2274
4104	Serge	2275	static int ironlake_irq_postinstall(struct drm_device *dev)
3031	serge	2276	{
4104	Serge	2277	unsigned long irqflags;
3031	serge	2278	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
4104	Serge	2279	u32 display_mask, extra_mask;
		2280
		2281	if (INTEL_INFO(dev)->gen >= 7) {
		2282	display_mask = (DE_MASTER_IRQ_CONTROL \| DE_GSE_IVB \|
		2283	DE_PCH_EVENT_IVB \| DE_PLANEC_FLIP_DONE_IVB \|
3031	serge	2284	DE_PLANEB_FLIP_DONE_IVB \|
4104	Serge	2285	DE_PLANEA_FLIP_DONE_IVB \| DE_AUX_CHANNEL_A_IVB \|
		2286	DE_ERR_INT_IVB);
		2287	extra_mask = (DE_PIPEC_VBLANK_IVB \| DE_PIPEB_VBLANK_IVB \|
		2288	DE_PIPEA_VBLANK_IVB);
2351	Serge	2289
4104	Serge	2290	I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
		2291	} else {
		2292	display_mask = (DE_MASTER_IRQ_CONTROL \| DE_GSE \| DE_PCH_EVENT \|
		2293	DE_PLANEA_FLIP_DONE \| DE_PLANEB_FLIP_DONE \|
		2294	DE_AUX_CHANNEL_A \| DE_PIPEB_FIFO_UNDERRUN \|
		2295	DE_PIPEA_FIFO_UNDERRUN \| DE_POISON);
		2296	extra_mask = DE_PIPEA_VBLANK \| DE_PIPEB_VBLANK \| DE_PCU_EVENT;
		2297	}
		2298
3031	serge	2299	dev_priv->irq_mask = ~display_mask;
		2300
		2301	/* should always can generate irq */
		2302	I915_WRITE(DEIIR, I915_READ(DEIIR));
		2303	I915_WRITE(DEIMR, dev_priv->irq_mask);
4104	Serge	2304	I915_WRITE(DEIER, display_mask \| extra_mask);
3031	serge	2305	POSTING_READ(DEIER);
		2306
4104	Serge	2307	gen5_gt_irq_postinstall(dev);
3031	serge	2308
4104	Serge	2309	ibx_irq_postinstall(dev);
3031	serge	2310
4104	Serge	2311	if (IS_IRONLAKE_M(dev)) {
		2312	/* Enable PCU event interrupts
		2313	*
		2314	* spinlocking not required here for correctness since interrupt
		2315	* setup is guaranteed to run in single-threaded context. But we
		2316	* need it to make the assert_spin_locked happy. */
		2317	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		2318	ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
		2319	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		2320	}
3031	serge	2321
		2322	return 0;
		2323	}
		2324
		2325	static int valleyview_irq_postinstall(struct drm_device *dev)
		2326	{
		2327	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2328	u32 enable_mask;
		2329	u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV;
4104	Serge	2330	unsigned long irqflags;
3031	serge	2331
		2332	enable_mask = I915_DISPLAY_PORT_INTERRUPT;
		2333	enable_mask \|= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2334	I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT \|
		2335	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2336	I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
		2337
		2338	/*
		2339	*Leave vblank interrupts masked initially. enable/disable will
		2340	* toggle them based on usage.
		2341	*/
		2342	dev_priv->irq_mask = (~enable_mask) \|
		2343	I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT \|
		2344	I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
		2345
3480	Serge	2346	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2347	POSTING_READ(PORT_HOTPLUG_EN);
		2348
3031	serge	2349	I915_WRITE(VLV_IMR, dev_priv->irq_mask);
		2350	I915_WRITE(VLV_IER, enable_mask);
		2351	I915_WRITE(VLV_IIR, 0xffffffff);
		2352	I915_WRITE(PIPESTAT(0), 0xffff);
		2353	I915_WRITE(PIPESTAT(1), 0xffff);
		2354	POSTING_READ(VLV_IER);
		2355
4104	Serge	2356	/* Interrupt setup is already guaranteed to be single-threaded, this is
		2357	* just to make the assert_spin_locked check happy. */
		2358	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3031	serge	2359	i915_enable_pipestat(dev_priv, 0, pipestat_enable);
3480	Serge	2360	i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
3031	serge	2361	i915_enable_pipestat(dev_priv, 1, pipestat_enable);
4104	Serge	2362	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3031	serge	2363
		2364	I915_WRITE(VLV_IIR, 0xffffffff);
		2365	I915_WRITE(VLV_IIR, 0xffffffff);
		2366
4104	Serge	2367	gen5_gt_irq_postinstall(dev);
3243	Serge	2368
3031	serge	2369	/* ack & enable invalid PTE error interrupts */
		2370	#if 0 /* FIXME: add support to irq handler for checking these bits */
		2371	I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
		2372	I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
		2373	#endif
		2374
		2375	I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3480	Serge	2376
		2377	return 0;
		2378	}
		2379
3031	serge	2380	static void valleyview_irq_uninstall(struct drm_device *dev)
		2381	{
		2382	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2383	int pipe;
		2384
		2385	if (!dev_priv)
		2386	return;
		2387
4293	Serge	2388	del_timer_sync(&dev_priv->hotplug_reenable_timer);
		2389
3031	serge	2390	for_each_pipe(pipe)
		2391	I915_WRITE(PIPESTAT(pipe), 0xffff);
		2392
		2393	I915_WRITE(HWSTAM, 0xffffffff);
		2394	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2395	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		2396	for_each_pipe(pipe)
		2397	I915_WRITE(PIPESTAT(pipe), 0xffff);
		2398	I915_WRITE(VLV_IIR, 0xffffffff);
		2399	I915_WRITE(VLV_IMR, 0xffffffff);
		2400	I915_WRITE(VLV_IER, 0x0);
		2401	POSTING_READ(VLV_IER);
		2402	}
		2403
		2404	static void ironlake_irq_uninstall(struct drm_device *dev)
		2405	{
		2406	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2407
		2408	if (!dev_priv)
		2409	return;
		2410
4293	Serge	2411	del_timer_sync(&dev_priv->hotplug_reenable_timer);
		2412
3031	serge	2413	I915_WRITE(HWSTAM, 0xffffffff);
		2414
		2415	I915_WRITE(DEIMR, 0xffffffff);
		2416	I915_WRITE(DEIER, 0x0);
		2417	I915_WRITE(DEIIR, I915_READ(DEIIR));
4104	Serge	2418	if (IS_GEN7(dev))
		2419	I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
3031	serge	2420
		2421	I915_WRITE(GTIMR, 0xffffffff);
		2422	I915_WRITE(GTIER, 0x0);
		2423	I915_WRITE(GTIIR, I915_READ(GTIIR));
		2424
3746	Serge	2425	if (HAS_PCH_NOP(dev))
		2426	return;
		2427
3031	serge	2428	I915_WRITE(SDEIMR, 0xffffffff);
		2429	I915_WRITE(SDEIER, 0x0);
		2430	I915_WRITE(SDEIIR, I915_READ(SDEIIR));
4104	Serge	2431	if (HAS_PCH_CPT(dev) \|\| HAS_PCH_LPT(dev))
		2432	I915_WRITE(SERR_INT, I915_READ(SERR_INT));
3031	serge	2433	}
		2434
		2435	#if 0
		2436
		2437	static void i8xx_irq_preinstall(struct drm_device * dev)
		2438	{
		2439	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2440	int pipe;
		2441
		2442	atomic_set(&dev_priv->irq_received, 0);
		2443
		2444	for_each_pipe(pipe)
		2445	I915_WRITE(PIPESTAT(pipe), 0);
		2446	I915_WRITE16(IMR, 0xffff);
		2447	I915_WRITE16(IER, 0x0);
		2448	POSTING_READ16(IER);
		2449	}
		2450
		2451	static int i8xx_irq_postinstall(struct drm_device *dev)
		2452	{
		2453	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2454
		2455	I915_WRITE16(EMR,
		2456	~(I915_ERROR_PAGE_TABLE \| I915_ERROR_MEMORY_REFRESH));
		2457
		2458	/* Unmask the interrupts that we always want on. */
		2459	dev_priv->irq_mask =
		2460	~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2461	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2462	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2463	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT \|
		2464	I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
		2465	I915_WRITE16(IMR, dev_priv->irq_mask);
		2466
		2467	I915_WRITE16(IER,
		2468	I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2469	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2470	I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT \|
		2471	I915_USER_INTERRUPT);
		2472	POSTING_READ16(IER);
		2473
		2474	return 0;
		2475	}
		2476
3746	Serge	2477	/*
		2478	* Returns true when a page flip has completed.
		2479	*/
		2480	static bool i8xx_handle_vblank(struct drm_device *dev,
		2481	int pipe, u16 iir)
		2482	{
		2483	drm_i915_private_t *dev_priv = dev->dev_private;
		2484	u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(pipe);
		2485
		2486	// if (!drm_handle_vblank(dev, pipe))
		2487	return false;
		2488
		2489	if ((iir & flip_pending) == 0)
		2490	return false;
		2491
		2492	// intel_prepare_page_flip(dev, pipe);
		2493
		2494	/* We detect FlipDone by looking for the change in PendingFlip from '1'
		2495	* to '0' on the following vblank, i.e. IIR has the Pendingflip
		2496	* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
		2497	* the flip is completed (no longer pending). Since this doesn't raise
		2498	* an interrupt per se, we watch for the change at vblank.
		2499	*/
		2500	if (I915_READ16(ISR) & flip_pending)
		2501	return false;
		2502
		2503	intel_finish_page_flip(dev, pipe);
		2504
		2505	return true;
		2506	}
		2507
3243	Serge	2508	static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3031	serge	2509	{
		2510	struct drm_device dev = (struct drm_device ) arg;
		2511	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2512	u16 iir, new_iir;
		2513	u32 pipe_stats[2];
		2514	unsigned long irqflags;
		2515	int pipe;
		2516	u16 flip_mask =
		2517	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2518	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
		2519
		2520	atomic_inc(&dev_priv->irq_received);
		2521
		2522	iir = I915_READ16(IIR);
		2523	if (iir == 0)
		2524	return IRQ_NONE;
		2525
		2526	while (iir & ~flip_mask) {
		2527	/* Can't rely on pipestat interrupt bit in iir as it might
		2528	* have been cleared after the pipestat interrupt was received.
		2529	* It doesn't set the bit in iir again, but it still produces
		2530	* interrupts (for non-MSI).
		2531	*/
		2532	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4126	Serge	2533	if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
		2534	i915_handle_error(dev, false);
3031	serge	2535
		2536	for_each_pipe(pipe) {
		2537	int reg = PIPESTAT(pipe);
		2538	pipe_stats[pipe] = I915_READ(reg);
		2539
		2540	/*
		2541	* Clear the PIPE*STAT regs before the IIR
		2542	*/
		2543	if (pipe_stats[pipe] & 0x8000ffff) {
		2544	if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
		2545	DRM_DEBUG_DRIVER("pipe %c underrun\n",
		2546	pipe_name(pipe));
		2547	I915_WRITE(reg, pipe_stats[pipe]);
		2548	}
		2549	}
		2550	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		2551
		2552	I915_WRITE16(IIR, iir & ~flip_mask);
		2553	new_iir = I915_READ16(IIR); /* Flush posted writes */
		2554
		2555	i915_update_dri1_breadcrumb(dev);
		2556
		2557	if (iir & I915_USER_INTERRUPT)
		2558	notify_ring(dev, &dev_priv->ring[RCS]);
		2559
		2560	if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
3746	Serge	2561	i8xx_handle_vblank(dev, 0, iir))
		2562	flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(0);
3031	serge	2563
		2564	if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
3746	Serge	2565	i8xx_handle_vblank(dev, 1, iir))
		2566	flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(1);
3031	serge	2567
		2568	iir = new_iir;
		2569	}
		2570
		2571	return IRQ_HANDLED;
		2572	}
		2573
		2574	static void i8xx_irq_uninstall(struct drm_device * dev)
		2575	{
		2576	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2577	int pipe;
		2578
		2579	for_each_pipe(pipe) {
		2580	/* Clear enable bits; then clear status bits */
		2581	I915_WRITE(PIPESTAT(pipe), 0);
		2582	I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
		2583	}
		2584	I915_WRITE16(IMR, 0xffff);
		2585	I915_WRITE16(IER, 0x0);
		2586	I915_WRITE16(IIR, I915_READ16(IIR));
		2587	}
		2588
		2589	#endif
		2590
		2591	static void i915_irq_preinstall(struct drm_device * dev)
		2592	{
		2593	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2594	int pipe;
		2595
		2596	atomic_set(&dev_priv->irq_received, 0);
		2597
		2598	if (I915_HAS_HOTPLUG(dev)) {
		2599	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2600	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		2601	}
		2602
		2603	I915_WRITE16(HWSTAM, 0xeffe);
		2604	for_each_pipe(pipe)
		2605	I915_WRITE(PIPESTAT(pipe), 0);
		2606	I915_WRITE(IMR, 0xffffffff);
		2607	I915_WRITE(IER, 0x0);
		2608	POSTING_READ(IER);
		2609	}
		2610
		2611	static int i915_irq_postinstall(struct drm_device *dev)
		2612	{
		2613	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2614	u32 enable_mask;
		2615
		2616	I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE \| I915_ERROR_MEMORY_REFRESH));
		2617
		2618	/* Unmask the interrupts that we always want on. */
		2619	dev_priv->irq_mask =
		2620	~(I915_ASLE_INTERRUPT \|
		2621	I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2622	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2623	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2624	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT \|
		2625	I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
		2626
		2627	enable_mask =
		2628	I915_ASLE_INTERRUPT \|
		2629	I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2630	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2631	I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT \|
		2632	I915_USER_INTERRUPT;
3480	Serge	2633
3031	serge	2634	if (I915_HAS_HOTPLUG(dev)) {
3480	Serge	2635	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2636	POSTING_READ(PORT_HOTPLUG_EN);
		2637
3031	serge	2638	/* Enable in IER... */
		2639	enable_mask \|= I915_DISPLAY_PORT_INTERRUPT;
		2640	/* and unmask in IMR */
		2641	dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
		2642	}
		2643
		2644	I915_WRITE(IMR, dev_priv->irq_mask);
		2645	I915_WRITE(IER, enable_mask);
		2646	POSTING_READ(IER);
		2647
4126	Serge	2648	i915_enable_asle_pipestat(dev);
3480	Serge	2649
		2650	return 0;
		2651	}
		2652
3746	Serge	2653	/*
		2654	* Returns true when a page flip has completed.
		2655	*/
		2656	static bool i915_handle_vblank(struct drm_device *dev,
		2657	int plane, int pipe, u32 iir)
3480	Serge	2658	{
3746	Serge	2659	drm_i915_private_t *dev_priv = dev->dev_private;
		2660	u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3480	Serge	2661
3746	Serge	2662	// if (!drm_handle_vblank(dev, pipe))
		2663	return false;
3480	Serge	2664
3746	Serge	2665	if ((iir & flip_pending) == 0)
		2666	return false;
3480	Serge	2667
3746	Serge	2668	// intel_prepare_page_flip(dev, plane);
3031	serge	2669
3746	Serge	2670	/* We detect FlipDone by looking for the change in PendingFlip from '1'
		2671	* to '0' on the following vblank, i.e. IIR has the Pendingflip
		2672	* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
		2673	* the flip is completed (no longer pending). Since this doesn't raise
		2674	* an interrupt per se, we watch for the change at vblank.
		2675	*/
		2676	if (I915_READ(ISR) & flip_pending)
		2677	return false;
		2678
		2679	intel_finish_page_flip(dev, pipe);
		2680
		2681	return true;
3031	serge	2682	}
		2683
3243	Serge	2684	static irqreturn_t i915_irq_handler(int irq, void *arg)
3031	serge	2685	{
		2686	struct drm_device dev = (struct drm_device ) arg;
		2687	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2688	u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
		2689	unsigned long irqflags;
		2690	u32 flip_mask =
		2691	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2692	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
		2693	int pipe, ret = IRQ_NONE;
		2694
		2695	atomic_inc(&dev_priv->irq_received);
		2696
		2697	iir = I915_READ(IIR);
		2698	do {
		2699	bool irq_received = (iir & ~flip_mask) != 0;
		2700	bool blc_event = false;
		2701
		2702	/* Can't rely on pipestat interrupt bit in iir as it might
		2703	* have been cleared after the pipestat interrupt was received.
		2704	* It doesn't set the bit in iir again, but it still produces
		2705	* interrupts (for non-MSI).
		2706	*/
		2707	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4126	Serge	2708	if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
		2709	i915_handle_error(dev, false);
3031	serge	2710
		2711	for_each_pipe(pipe) {
		2712	int reg = PIPESTAT(pipe);
		2713	pipe_stats[pipe] = I915_READ(reg);
		2714
		2715	/* Clear the PIPESTAT regs before the IIR /
		2716	if (pipe_stats[pipe] & 0x8000ffff) {
		2717	if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
		2718	DRM_DEBUG_DRIVER("pipe %c underrun\n",
		2719	pipe_name(pipe));
		2720	I915_WRITE(reg, pipe_stats[pipe]);
		2721	irq_received = true;
		2722	}
		2723	}
		2724	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		2725
		2726	if (!irq_received)
		2727	break;
		2728
		2729	/* Consume port. Then clear IIR or we'll miss events */
		2730	if ((I915_HAS_HOTPLUG(dev)) &&
		2731	(iir & I915_DISPLAY_PORT_INTERRUPT)) {
		2732	u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3746	Serge	2733	u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3031	serge	2734
		2735	DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
		2736	hotplug_status);
4104	Serge	2737
		2738	intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
		2739
3031	serge	2740	I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
		2741	POSTING_READ(PORT_HOTPLUG_STAT);
		2742	}
		2743
		2744	I915_WRITE(IIR, iir & ~flip_mask);
		2745	new_iir = I915_READ(IIR); /* Flush posted writes */
		2746
		2747	if (iir & I915_USER_INTERRUPT)
		2748	notify_ring(dev, &dev_priv->ring[RCS]);
		2749
		2750	for_each_pipe(pipe) {
		2751	int plane = pipe;
		2752	if (IS_MOBILE(dev))
		2753	plane = !plane;
		2754
3746	Serge	2755	if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
		2756	i915_handle_vblank(dev, plane, pipe, iir))
		2757	flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
		2758
3031	serge	2759	if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
		2760	blc_event = true;
		2761	}
		2762
4126	Serge	2763	if (blc_event \|\| (iir & I915_ASLE_INTERRUPT))
		2764	intel_opregion_asle_intr(dev);
3031	serge	2765
		2766	/* With MSI, interrupts are only generated when iir
		2767	* transitions from zero to nonzero. If another bit got
		2768	* set while we were handling the existing iir bits, then
		2769	* we would never get another interrupt.
		2770	*
		2771	* This is fine on non-MSI as well, as if we hit this path
		2772	* we avoid exiting the interrupt handler only to generate
		2773	* another one.
		2774	*
		2775	* Note that for MSI this could cause a stray interrupt report
		2776	* if an interrupt landed in the time between writing IIR and
		2777	* the posting read. This should be rare enough to never
		2778	* trigger the 99% of 100,000 interrupts test for disabling
		2779	* stray interrupts.
		2780	*/
		2781	ret = IRQ_HANDLED;
		2782	iir = new_iir;
		2783	} while (iir & ~flip_mask);
		2784
		2785	i915_update_dri1_breadcrumb(dev);
		2786
		2787	return ret;
		2788	}
		2789
		2790	static void i915_irq_uninstall(struct drm_device * dev)
		2791	{
		2792	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2793	int pipe;
		2794
4293	Serge	2795	del_timer_sync(&dev_priv->hotplug_reenable_timer);
		2796
3031	serge	2797	if (I915_HAS_HOTPLUG(dev)) {
		2798	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2799	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		2800	}
		2801
		2802	I915_WRITE16(HWSTAM, 0xffff);
		2803	for_each_pipe(pipe) {
		2804	/* Clear enable bits; then clear status bits */
		2805	I915_WRITE(PIPESTAT(pipe), 0);
		2806	I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
		2807	}
		2808	I915_WRITE(IMR, 0xffffffff);
		2809	I915_WRITE(IER, 0x0);
		2810
		2811	I915_WRITE(IIR, I915_READ(IIR));
		2812	}
		2813
		2814	static void i965_irq_preinstall(struct drm_device * dev)
		2815	{
		2816	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2817	int pipe;
		2818
		2819	atomic_set(&dev_priv->irq_received, 0);
		2820
		2821	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2822	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		2823
		2824	I915_WRITE(HWSTAM, 0xeffe);
		2825	for_each_pipe(pipe)
		2826	I915_WRITE(PIPESTAT(pipe), 0);
		2827	I915_WRITE(IMR, 0xffffffff);
		2828	I915_WRITE(IER, 0x0);
		2829	POSTING_READ(IER);
		2830	}
		2831
		2832	static int i965_irq_postinstall(struct drm_device *dev)
		2833	{
		2834	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2835	u32 enable_mask;
		2836	u32 error_mask;
4104	Serge	2837	unsigned long irqflags;
3031	serge	2838
		2839	/* Unmask the interrupts that we always want on. */
		2840	dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT \|
		2841	I915_DISPLAY_PORT_INTERRUPT \|
		2842	I915_DISPLAY_PIPE_A_EVENT_INTERRUPT \|
		2843	I915_DISPLAY_PIPE_B_EVENT_INTERRUPT \|
		2844	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2845	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT \|
		2846	I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
		2847
		2848	enable_mask = ~dev_priv->irq_mask;
3746	Serge	2849	enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2850	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3031	serge	2851	enable_mask \|= I915_USER_INTERRUPT;
		2852
		2853	if (IS_G4X(dev))
		2854	enable_mask \|= I915_BSD_USER_INTERRUPT;
		2855
4104	Serge	2856	/* Interrupt setup is already guaranteed to be single-threaded, this is
		2857	* just to make the assert_spin_locked check happy. */
		2858	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3480	Serge	2859	i915_enable_pipestat(dev_priv, 0, PIPE_GMBUS_EVENT_ENABLE);
4104	Serge	2860	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3031	serge	2861
		2862	/*
		2863	* Enable some error detection, note the instruction error mask
		2864	* bit is reserved, so we leave it masked.
		2865	*/
		2866	if (IS_G4X(dev)) {
		2867	error_mask = ~(GM45_ERROR_PAGE_TABLE \|
		2868	GM45_ERROR_MEM_PRIV \|
		2869	GM45_ERROR_CP_PRIV \|
		2870	I915_ERROR_MEMORY_REFRESH);
		2871	} else {
		2872	error_mask = ~(I915_ERROR_PAGE_TABLE \|
		2873	I915_ERROR_MEMORY_REFRESH);
		2874	}
		2875	I915_WRITE(EMR, error_mask);
		2876
		2877	I915_WRITE(IMR, dev_priv->irq_mask);
		2878	I915_WRITE(IER, enable_mask);
		2879	POSTING_READ(IER);
		2880
3480	Serge	2881	I915_WRITE(PORT_HOTPLUG_EN, 0);
		2882	POSTING_READ(PORT_HOTPLUG_EN);
		2883
4126	Serge	2884	i915_enable_asle_pipestat(dev);
3480	Serge	2885
		2886	return 0;
		2887	}
		2888
3746	Serge	2889	static void i915_hpd_irq_setup(struct drm_device *dev)
3480	Serge	2890	{
		2891	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
3746	Serge	2892	struct drm_mode_config *mode_config = &dev->mode_config;
		2893	struct intel_encoder *intel_encoder;
3480	Serge	2894	u32 hotplug_en;
		2895
4104	Serge	2896	assert_spin_locked(&dev_priv->irq_lock);
		2897
3746	Serge	2898	if (I915_HAS_HOTPLUG(dev)) {
		2899	hotplug_en = I915_READ(PORT_HOTPLUG_EN);
		2900	hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3031	serge	2901	/* Note HDMI and DP share hotplug bits */
3746	Serge	2902	/* enable bits are the same for all generations */
		2903	list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
		2904	if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
		2905	hotplug_en \|= hpd_mask_i915[intel_encoder->hpd_pin];
3031	serge	2906	/* Programming the CRT detection parameters tends
		2907	to generate a spurious hotplug event about three
		2908	seconds later. So just do it once.
		2909	*/
		2910	if (IS_G4X(dev))
		2911	hotplug_en \|= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3746	Serge	2912	hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3031	serge	2913	hotplug_en \|= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3480	Serge	2914
3031	serge	2915	/* Ignore TV since it's buggy */
		2916	I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3746	Serge	2917	}
3031	serge	2918	}
		2919
3243	Serge	2920	static irqreturn_t i965_irq_handler(int irq, void *arg)
3031	serge	2921	{
		2922	struct drm_device dev = (struct drm_device ) arg;
		2923	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		2924	u32 iir, new_iir;
		2925	u32 pipe_stats[I915_MAX_PIPES];
		2926	unsigned long irqflags;
		2927	int irq_received;
		2928	int ret = IRQ_NONE, pipe;
3746	Serge	2929	u32 flip_mask =
		2930	I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT \|
		2931	I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3031	serge	2932
		2933	atomic_inc(&dev_priv->irq_received);
		2934
		2935	iir = I915_READ(IIR);
		2936
		2937	for (;;) {
		2938	bool blc_event = false;
		2939
3746	Serge	2940	irq_received = (iir & ~flip_mask) != 0;
3031	serge	2941
		2942	/* Can't rely on pipestat interrupt bit in iir as it might
		2943	* have been cleared after the pipestat interrupt was received.
		2944	* It doesn't set the bit in iir again, but it still produces
		2945	* interrupts (for non-MSI).
		2946	*/
		2947	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
4126	Serge	2948	if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
		2949	i915_handle_error(dev, false);
3031	serge	2950
		2951	for_each_pipe(pipe) {
		2952	int reg = PIPESTAT(pipe);
		2953	pipe_stats[pipe] = I915_READ(reg);
		2954
		2955	/*
		2956	* Clear the PIPE*STAT regs before the IIR
		2957	*/
		2958	if (pipe_stats[pipe] & 0x8000ffff) {
		2959	if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
		2960	DRM_DEBUG_DRIVER("pipe %c underrun\n",
		2961	pipe_name(pipe));
		2962	I915_WRITE(reg, pipe_stats[pipe]);
		2963	irq_received = 1;
		2964	}
		2965	}
		2966	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		2967
		2968	if (!irq_received)
		2969	break;
		2970
		2971	ret = IRQ_HANDLED;
		2972
		2973	/* Consume port. Then clear IIR or we'll miss events */
		2974	if (iir & I915_DISPLAY_PORT_INTERRUPT) {
		2975	u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3746	Serge	2976	u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
		2977	HOTPLUG_INT_STATUS_G4X :
4104	Serge	2978	HOTPLUG_INT_STATUS_I915);
3031	serge	2979
		2980	DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
		2981	hotplug_status);
4104	Serge	2982
		2983	intel_hpd_irq_handler(dev, hotplug_trigger,
		2984	IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i915);
		2985
3031	serge	2986	I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
		2987	I915_READ(PORT_HOTPLUG_STAT);
		2988	}
		2989
3746	Serge	2990	I915_WRITE(IIR, iir & ~flip_mask);
3031	serge	2991	new_iir = I915_READ(IIR); /* Flush posted writes */
		2992
		2993	if (iir & I915_USER_INTERRUPT)
		2994	notify_ring(dev, &dev_priv->ring[RCS]);
		2995	if (iir & I915_BSD_USER_INTERRUPT)
		2996	notify_ring(dev, &dev_priv->ring[VCS]);
		2997
		2998	for_each_pipe(pipe) {
3746	Serge	2999	if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
		3000	i915_handle_vblank(dev, pipe, pipe, iir))
		3001	flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3031	serge	3002
		3003	if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
		3004	blc_event = true;
		3005	}
		3006
		3007
4126	Serge	3008	if (blc_event \|\| (iir & I915_ASLE_INTERRUPT))
		3009	intel_opregion_asle_intr(dev);
3031	serge	3010
3480	Serge	3011	if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
		3012	gmbus_irq_handler(dev);
		3013
3031	serge	3014	/* With MSI, interrupts are only generated when iir
		3015	* transitions from zero to nonzero. If another bit got
		3016	* set while we were handling the existing iir bits, then
		3017	* we would never get another interrupt.
		3018	*
		3019	* This is fine on non-MSI as well, as if we hit this path
		3020	* we avoid exiting the interrupt handler only to generate
		3021	* another one.
		3022	*
		3023	* Note that for MSI this could cause a stray interrupt report
		3024	* if an interrupt landed in the time between writing IIR and
		3025	* the posting read. This should be rare enough to never
		3026	* trigger the 99% of 100,000 interrupts test for disabling
		3027	* stray interrupts.
		3028	*/
		3029	iir = new_iir;
		3030	}
		3031
		3032	i915_update_dri1_breadcrumb(dev);
		3033
		3034	return ret;
		3035	}
		3036
		3037	static void i965_irq_uninstall(struct drm_device * dev)
		3038	{
		3039	drm_i915_private_t dev_priv = (drm_i915_private_t ) dev->dev_private;
		3040	int pipe;
		3041
		3042	if (!dev_priv)
		3043	return;
		3044
4293	Serge	3045	del_timer_sync(&dev_priv->hotplug_reenable_timer);
		3046
3031	serge	3047	I915_WRITE(PORT_HOTPLUG_EN, 0);
		3048	I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
		3049
		3050	I915_WRITE(HWSTAM, 0xffffffff);
		3051	for_each_pipe(pipe)
		3052	I915_WRITE(PIPESTAT(pipe), 0);
		3053	I915_WRITE(IMR, 0xffffffff);
		3054	I915_WRITE(IER, 0x0);
		3055
		3056	for_each_pipe(pipe)
		3057	I915_WRITE(PIPESTAT(pipe),
		3058	I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
		3059	I915_WRITE(IIR, I915_READ(IIR));
		3060	}
		3061
4126	Serge	3062	static void i915_reenable_hotplug_timer_func(unsigned long data)
		3063	{
		3064	drm_i915_private_t dev_priv = (drm_i915_private_t )data;
		3065	struct drm_device *dev = dev_priv->dev;
		3066	struct drm_mode_config *mode_config = &dev->mode_config;
		3067	unsigned long irqflags;
		3068	int i;
		3069
		3070	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
		3071	for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
		3072	struct drm_connector *connector;
		3073
		3074	if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
		3075	continue;
		3076
		3077	dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
		3078
		3079	list_for_each_entry(connector, &mode_config->connector_list, head) {
		3080	struct intel_connector *intel_connector = to_intel_connector(connector);
		3081
		3082	if (intel_connector->encoder->hpd_pin == i) {
		3083	if (connector->polled != intel_connector->polled)
		3084	DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
		3085	drm_get_connector_name(connector));
		3086	connector->polled = intel_connector->polled;
		3087	if (!connector->polled)
		3088	connector->polled = DRM_CONNECTOR_POLL_HPD;
		3089	}
		3090	}
		3091	}
		3092	if (dev_priv->display.hpd_irq_setup)
		3093	dev_priv->display.hpd_irq_setup(dev);
		3094	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		3095	}
		3096
2351	Serge	3097	void intel_irq_init(struct drm_device *dev)
		3098	{
3031	serge	3099	struct drm_i915_private *dev_priv = dev->dev_private;
		3100
3480	Serge	3101	INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
4126	Serge	3102	INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
		3103	INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
		3104	INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
3480	Serge	3105
4126	Serge	3106	setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
		3107	(unsigned long) dev_priv);
3480	Serge	3108
4293	Serge	3109	dev->driver->get_vblank_counter = i915_get_vblank_counter;
		3110	dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
		3111	if (IS_G4X(dev) \|\| INTEL_INFO(dev)->gen >= 5) {
		3112	dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
		3113	dev->driver->get_vblank_counter = gm45_get_vblank_counter;
		3114	}
3480	Serge	3115
4293	Serge	3116	if (drm_core_check_feature(dev, DRIVER_MODESET))
		3117	dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
		3118	else
		3119	dev->driver->get_vblank_timestamp = NULL;
		3120	dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3480	Serge	3121
3031	serge	3122	if (IS_VALLEYVIEW(dev)) {
3243	Serge	3123	dev->driver->irq_handler = valleyview_irq_handler;
		3124	dev->driver->irq_preinstall = valleyview_irq_preinstall;
		3125	dev->driver->irq_postinstall = valleyview_irq_postinstall;
4293	Serge	3126	dev->driver->irq_uninstall = valleyview_irq_uninstall;
		3127	dev->driver->enable_vblank = valleyview_enable_vblank;
		3128	dev->driver->disable_vblank = valleyview_disable_vblank;
3746	Serge	3129	dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
2351	Serge	3130	} else if (HAS_PCH_SPLIT(dev)) {
3243	Serge	3131	dev->driver->irq_handler = ironlake_irq_handler;
		3132	dev->driver->irq_preinstall = ironlake_irq_preinstall;
		3133	dev->driver->irq_postinstall = ironlake_irq_postinstall;
4293	Serge	3134	dev->driver->irq_uninstall = ironlake_irq_uninstall;
		3135	dev->driver->enable_vblank = ironlake_enable_vblank;
		3136	dev->driver->disable_vblank = ironlake_disable_vblank;
3746	Serge	3137	dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
2351	Serge	3138	} else {
3031	serge	3139	if (INTEL_INFO(dev)->gen == 2) {
		3140	} else if (INTEL_INFO(dev)->gen == 3) {
3243	Serge	3141	dev->driver->irq_preinstall = i915_irq_preinstall;
		3142	dev->driver->irq_postinstall = i915_irq_postinstall;
4293	Serge	3143	dev->driver->irq_uninstall = i915_irq_uninstall;
3243	Serge	3144	dev->driver->irq_handler = i915_irq_handler;
3480	Serge	3145	dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3031	serge	3146	} else {
3243	Serge	3147	dev->driver->irq_preinstall = i965_irq_preinstall;
		3148	dev->driver->irq_postinstall = i965_irq_postinstall;
4293	Serge	3149	dev->driver->irq_uninstall = i965_irq_uninstall;
3243	Serge	3150	dev->driver->irq_handler = i965_irq_handler;
3746	Serge	3151	dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3031	serge	3152	}
4293	Serge	3153	dev->driver->enable_vblank = i915_enable_vblank;
		3154	dev->driver->disable_vblank = i915_disable_vblank;
2351	Serge	3155	}
3480	Serge	3156	}
3243	Serge	3157
3480	Serge	3158	void intel_hpd_init(struct drm_device *dev)
		3159	{
		3160	struct drm_i915_private *dev_priv = dev->dev_private;
3746	Serge	3161	struct drm_mode_config *mode_config = &dev->mode_config;
		3162	struct drm_connector *connector;
4104	Serge	3163	unsigned long irqflags;
3746	Serge	3164	int i;
3480	Serge	3165
3746	Serge	3166	for (i = 1; i < HPD_NUM_PINS; i++) {
		3167	dev_priv->hpd_stats[i].hpd_cnt = 0;
		3168	dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
		3169	}
		3170	list_for_each_entry(connector, &mode_config->connector_list, head) {
		3171	struct intel_connector *intel_connector = to_intel_connector(connector);
		3172	connector->polled = intel_connector->polled;
		3173	if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
		3174	connector->polled = DRM_CONNECTOR_POLL_HPD;
		3175	}
4104	Serge	3176
		3177	/* Interrupt setup is already guaranteed to be single-threaded, this is
		3178	* just to make the assert_spin_locked checks happy. */
		3179	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3480	Serge	3180	if (dev_priv->display.hpd_irq_setup)
		3181	dev_priv->display.hpd_irq_setup(dev);
4104	Serge	3182	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2351	Serge	3183	}
		3184
4104	Serge	3185	/* Disable interrupts so we can allow Package C8+. */
		3186	void hsw_pc8_disable_interrupts(struct drm_device *dev)
3243	Serge	3187	{
4104	Serge	3188	struct drm_i915_private *dev_priv = dev->dev_private;
		3189	unsigned long irqflags;
2351	Serge	3190
4104	Serge	3191	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3243	Serge	3192
4104	Serge	3193	dev_priv->pc8.regsave.deimr = I915_READ(DEIMR);
		3194	dev_priv->pc8.regsave.sdeimr = I915_READ(SDEIMR);
		3195	dev_priv->pc8.regsave.gtimr = I915_READ(GTIMR);
		3196	dev_priv->pc8.regsave.gtier = I915_READ(GTIER);
		3197	dev_priv->pc8.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR);
3243	Serge	3198
4104	Serge	3199	ironlake_disable_display_irq(dev_priv, ~DE_PCH_EVENT_IVB);
		3200	ibx_disable_display_interrupt(dev_priv, ~SDE_HOTPLUG_MASK_CPT);
		3201	ilk_disable_gt_irq(dev_priv, 0xffffffff);
		3202	snb_disable_pm_irq(dev_priv, 0xffffffff);
		3203
		3204	dev_priv->pc8.irqs_disabled = true;
		3205
		3206	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
3243	Serge	3207	}
		3208
4104	Serge	3209	/* Restore interrupts so we can recover from Package C8+. */
		3210	void hsw_pc8_restore_interrupts(struct drm_device *dev)
2351	Serge	3211	{
4104	Serge	3212	struct drm_i915_private *dev_priv = dev->dev_private;
		3213	unsigned long irqflags;
		3214	uint32_t val, expected;
2351	Serge	3215
4104	Serge	3216	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
3051	serge	3217
4104	Serge	3218	val = I915_READ(DEIMR);
		3219	expected = ~DE_PCH_EVENT_IVB;
		3220	WARN(val != expected, "DEIMR is 0x%08x, not 0x%08x\n", val, expected);
2351	Serge	3221
4104	Serge	3222	val = I915_READ(SDEIMR) & ~SDE_HOTPLUG_MASK_CPT;
		3223	expected = ~SDE_HOTPLUG_MASK_CPT;
		3224	WARN(val != expected, "SDEIMR non-HPD bits are 0x%08x, not 0x%08x\n",
		3225	val, expected);
2351	Serge	3226
4104	Serge	3227	val = I915_READ(GTIMR);
		3228	expected = 0xffffffff;
		3229	WARN(val != expected, "GTIMR is 0x%08x, not 0x%08x\n", val, expected);
2351	Serge	3230
4104	Serge	3231	val = I915_READ(GEN6_PMIMR);
		3232	expected = 0xffffffff;
		3233	WARN(val != expected, "GEN6_PMIMR is 0x%08x, not 0x%08x\n", val,
		3234	expected);
2351	Serge	3235
4104	Serge	3236	dev_priv->pc8.irqs_disabled = false;
2351	Serge	3237
4104	Serge	3238	ironlake_enable_display_irq(dev_priv, ~dev_priv->pc8.regsave.deimr);
		3239	ibx_enable_display_interrupt(dev_priv,
		3240	~dev_priv->pc8.regsave.sdeimr &
		3241	~SDE_HOTPLUG_MASK_CPT);
		3242	ilk_enable_gt_irq(dev_priv, ~dev_priv->pc8.regsave.gtimr);
		3243	snb_enable_pm_irq(dev_priv, ~dev_priv->pc8.regsave.gen6_pmimr);
		3244	I915_WRITE(GTIER, dev_priv->pc8.regsave.gtier);
2351	Serge	3245
4104	Serge	3246	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
		3247	}
2351	Serge	3248
		3249
4104	Serge	3250	irqreturn_t intel_irq_handler(struct drm_device *dev)
		3251	{
2351	Serge	3252
4104	Serge	3253	// printf("i915 irq\n");
2351	Serge	3254
4104	Serge	3255	// printf("device %p driver %p handler %p\n", dev, dev->driver, dev->driver->irq_handler) ;
		3256
		3257	return dev->driver->irq_handler(0, dev);
2351	Serge	3258	}
		3259

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/i915/i915_irq.c @ 5367 – Rev 4293