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googlers / maze / linux / a841f8cef4bb124f0f5563314d0beaf2e1249d72 / . / drivers / gpu / drm / i915 / i915_irq.c
blob: 1417660a93ec00a0a8a24cc797acc7b7754db063 [file] [log] [blame]
/* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
*/
/*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sysrq.h>
#include <linux/slab.h>
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "i915_trace.h"
#include "intel_drv.h"
/* For display hotplug interrupt */
static void
ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask & mask) != 0) {
dev_priv->irq_mask &= ~mask;
I915_WRITE(DEIMR, dev_priv->irq_mask);
POSTING_READ(DEIMR);
}
}
static inline void
ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask & mask) != mask) {
dev_priv->irq_mask |= mask;
I915_WRITE(DEIMR, dev_priv->irq_mask);
POSTING_READ(DEIMR);
}
}
void
i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != mask) {
u32 reg = PIPESTAT(pipe);
dev_priv->pipestat[pipe] |= mask;
/* Enable the interrupt, clear any pending status */
I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
POSTING_READ(reg);
}
}
void
i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != 0) {
u32 reg = PIPESTAT(pipe);
dev_priv->pipestat[pipe] &= ~mask;
I915_WRITE(reg, dev_priv->pipestat[pipe]);
POSTING_READ(reg);
}
}
/**
* intel_enable_asle - enable ASLE interrupt for OpRegion
*/
void intel_enable_asle(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
unsigned long irqflags;
/* FIXME: opregion/asle for VLV */
if (IS_VALLEYVIEW(dev))
return;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (HAS_PCH_SPLIT(dev))
ironlake_enable_display_irq(dev_priv, DE_GSE);
else {
i915_enable_pipestat(dev_priv, 1,
PIPE_LEGACY_BLC_EVENT_ENABLE);
if (INTEL_INFO(dev)->gen >= 4)
i915_enable_pipestat(dev_priv, 0,
PIPE_LEGACY_BLC_EVENT_ENABLE);
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
/**
* i915_pipe_enabled - check if a pipe is enabled
* @dev: DRM device
* @pipe: pipe to check
*
* Reading certain registers when the pipe is disabled can hang the chip.
* Use this routine to make sure the PLL is running and the pipe is active
* before reading such registers if unsure.
*/
static int
i915_pipe_enabled(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
}
/* Called from drm generic code, passed a 'crtc', which
* we use as a pipe index
*/
static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long high_frame;
unsigned long low_frame;
u32 high1, high2, low;
if (!i915_pipe_enabled(dev, pipe)) {
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
"pipe %c\n", pipe_name(pipe));
return 0;
}
high_frame = PIPEFRAME(pipe);
low_frame = PIPEFRAMEPIXEL(pipe);
/*
* High & low register fields aren't synchronized, so make sure
* we get a low value that's stable across two reads of the high
* register.
*/
do {
high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
low = I915_READ(low_frame) & PIPE_FRAME_LOW_MASK;
high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
} while (high1 != high2);
high1 >>= PIPE_FRAME_HIGH_SHIFT;
low >>= PIPE_FRAME_LOW_SHIFT;
return (high1 << 8) | low;
}
static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int reg = PIPE_FRMCOUNT_GM45(pipe);
if (!i915_pipe_enabled(dev, pipe)) {
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
"pipe %c\n", pipe_name(pipe));
return 0;
}
return I915_READ(reg);
}
static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
int *vpos, int *hpos)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 vbl = 0, position = 0;
int vbl_start, vbl_end, htotal, vtotal;
bool in_vbl = true;
int ret = 0;
if (!i915_pipe_enabled(dev, pipe)) {
DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
"pipe %c\n", pipe_name(pipe));
return 0;
}
/* Get vtotal. */
vtotal = 1 + ((I915_READ(VTOTAL(pipe)) >> 16) & 0x1fff);
if (INTEL_INFO(dev)->gen >= 4) {
/* No obvious pixelcount register. Only query vertical
* scanout position from Display scan line register.
*/
position = I915_READ(PIPEDSL(pipe));
/* Decode into vertical scanout position. Don't have
* horizontal scanout position.
*/
*vpos = position & 0x1fff;
*hpos = 0;
} else {
/* Have access to pixelcount since start of frame.
* We can split this into vertical and horizontal
* scanout position.
*/
position = (I915_READ(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
htotal = 1 + ((I915_READ(HTOTAL(pipe)) >> 16) & 0x1fff);
*vpos = position / htotal;
*hpos = position - (*vpos * htotal);
}
/* Query vblank area. */
vbl = I915_READ(VBLANK(pipe));
/* Test position against vblank region. */
vbl_start = vbl & 0x1fff;
vbl_end = (vbl >> 16) & 0x1fff;
if ((*vpos < vbl_start) || (*vpos > vbl_end))
in_vbl = false;
/* Inside "upper part" of vblank area? Apply corrective offset: */
if (in_vbl && (*vpos >= vbl_start))
*vpos = *vpos - vtotal;
/* Readouts valid? */
if (vbl > 0)
ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
/* In vblank? */
if (in_vbl)
ret |= DRM_SCANOUTPOS_INVBL;
return ret;
}
static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
int *max_error,
struct timeval *vblank_time,
unsigned flags)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
if (pipe < 0 || pipe >= dev_priv->num_pipe) {
DRM_ERROR("Invalid crtc %d\n", pipe);
return -EINVAL;
}
/* Get drm_crtc to timestamp: */
crtc = intel_get_crtc_for_pipe(dev, pipe);
if (crtc == NULL) {
DRM_ERROR("Invalid crtc %d\n", pipe);
return -EINVAL;
}
if (!crtc->enabled) {
DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
return -EBUSY;
}
/* Helper routine in DRM core does all the work: */
return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
vblank_time, flags,
crtc);
}
/*
* Handle hotplug events outside the interrupt handler proper.
*/
static void i915_hotplug_work_func(struct work_struct *work)
{
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
hotplug_work);
struct drm_device *dev = dev_priv->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
struct intel_encoder *encoder;
mutex_lock(&mode_config->mutex);
DRM_DEBUG_KMS("running encoder hotplug functions\n");
list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
if (encoder->hot_plug)
encoder->hot_plug(encoder);
mutex_unlock(&mode_config->mutex);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
static void i915_handle_rps_change(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
u32 busy_up, busy_down, max_avg, min_avg;
u8 new_delay = dev_priv->cur_delay;
I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
busy_up = I915_READ(RCPREVBSYTUPAVG);
busy_down = I915_READ(RCPREVBSYTDNAVG);
max_avg = I915_READ(RCBMAXAVG);
min_avg = I915_READ(RCBMINAVG);
/* Handle RCS change request from hw */
if (busy_up > max_avg) {
if (dev_priv->cur_delay != dev_priv->max_delay)
new_delay = dev_priv->cur_delay - 1;
if (new_delay < dev_priv->max_delay)
new_delay = dev_priv->max_delay;
} else if (busy_down < min_avg) {
if (dev_priv->cur_delay != dev_priv->min_delay)
new_delay = dev_priv->cur_delay + 1;
if (new_delay > dev_priv->min_delay)
new_delay = dev_priv->min_delay;
}
if (ironlake_set_drps(dev, new_delay))
dev_priv->cur_delay = new_delay;
return;
}
static void notify_ring(struct drm_device *dev,
struct intel_ring_buffer *ring)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (ring->obj == NULL)
return;
trace_i915_gem_request_complete(ring, ring->get_seqno(ring));
wake_up_all(&ring->irq_queue);
if (i915_enable_hangcheck) {
dev_priv->hangcheck_count = 0;
mod_timer(&dev_priv->hangcheck_timer,
jiffies +
msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
}
}
static void gen6_pm_rps_work(struct work_struct *work)
{
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
rps_work);
u32 pm_iir, pm_imr;
u8 new_delay;
spin_lock_irq(&dev_priv->rps_lock);
pm_iir = dev_priv->pm_iir;
dev_priv->pm_iir = 0;
pm_imr = I915_READ(GEN6_PMIMR);
I915_WRITE(GEN6_PMIMR, 0);
spin_unlock_irq(&dev_priv->rps_lock);
if ((pm_iir & GEN6_PM_DEFERRED_EVENTS) == 0)
return;
mutex_lock(&dev_priv->dev->struct_mutex);
if (pm_iir & GEN6_PM_RP_UP_THRESHOLD)
new_delay = dev_priv->cur_delay + 1;
else
new_delay = dev_priv->cur_delay - 1;
gen6_set_rps(dev_priv->dev, new_delay);
mutex_unlock(&dev_priv->dev->struct_mutex);
}
static void snb_gt_irq_handler(struct drm_device *dev,
struct drm_i915_private *dev_priv,
u32 gt_iir)
{
if (gt_iir & (GEN6_RENDER_USER_INTERRUPT |
GEN6_RENDER_PIPE_CONTROL_NOTIFY_INTERRUPT))
notify_ring(dev, &dev_priv->ring[RCS]);
if (gt_iir & GEN6_BSD_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[VCS]);
if (gt_iir & GEN6_BLITTER_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[BCS]);
if (gt_iir & (GT_GEN6_BLT_CS_ERROR_INTERRUPT |
GT_GEN6_BSD_CS_ERROR_INTERRUPT |
GT_RENDER_CS_ERROR_INTERRUPT)) {
DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
i915_handle_error(dev, false);
}
}
static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
u32 pm_iir)
{
unsigned long flags;
/*
* IIR bits should never already be set because IMR should
* prevent an interrupt from being shown in IIR. The warning
* displays a case where we've unsafely cleared
* dev_priv->pm_iir. Although missing an interrupt of the same
* type is not a problem, it displays a problem in the logic.
*
* The mask bit in IMR is cleared by rps_work.
*/
spin_lock_irqsave(&dev_priv->rps_lock, flags);
WARN(dev_priv->pm_iir & pm_iir, "Missed a PM interrupt\n");
dev_priv->pm_iir |= pm_iir;
I915_WRITE(GEN6_PMIMR, dev_priv->pm_iir);
POSTING_READ(GEN6_PMIMR);
spin_unlock_irqrestore(&dev_priv->rps_lock, flags);
queue_work(dev_priv->wq, &dev_priv->rps_work);
}
static irqreturn_t valleyview_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 iir, gt_iir, pm_iir;
irqreturn_t ret = IRQ_NONE;
unsigned long irqflags;
int pipe;
u32 pipe_stats[I915_MAX_PIPES];
u32 vblank_status;
int vblank = 0;
bool blc_event;
atomic_inc(&dev_priv->irq_received);
vblank_status = PIPE_START_VBLANK_INTERRUPT_STATUS |
PIPE_VBLANK_INTERRUPT_STATUS;
while (true) {
iir = I915_READ(VLV_IIR);
gt_iir = I915_READ(GTIIR);
pm_iir = I915_READ(GEN6_PMIIR);
if (gt_iir == 0 && pm_iir == 0 && iir == 0)
goto out;
ret = IRQ_HANDLED;
snb_gt_irq_handler(dev, dev_priv, gt_iir);
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
for_each_pipe(pipe) {
int reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & 0x8000ffff) {
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe %c underrun\n",
pipe_name(pipe));
I915_WRITE(reg, pipe_stats[pipe]);
}
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
/* Consume port. Then clear IIR or we'll miss events */
if (iir & I915_DISPLAY_PORT_INTERRUPT) {
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_status & dev_priv->hotplug_supported_mask)
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
I915_READ(PORT_HOTPLUG_STAT);
}
if (iir & I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT) {
drm_handle_vblank(dev, 0);
vblank++;
intel_finish_page_flip(dev, 0);
}
if (iir & I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT) {
drm_handle_vblank(dev, 1);
vblank++;
intel_finish_page_flip(dev, 0);
}
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
blc_event = true;
if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
gen6_queue_rps_work(dev_priv, pm_iir);
I915_WRITE(GTIIR, gt_iir);
I915_WRITE(GEN6_PMIIR, pm_iir);
I915_WRITE(VLV_IIR, iir);
}
out:
return ret;
}
static void pch_irq_handler(struct drm_device *dev, u32 pch_iir)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
if (pch_iir & SDE_AUDIO_POWER_MASK)
DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
(pch_iir & SDE_AUDIO_POWER_MASK) >>
SDE_AUDIO_POWER_SHIFT);
if (pch_iir & SDE_GMBUS)
DRM_DEBUG_DRIVER("PCH GMBUS interrupt\n");
if (pch_iir & SDE_AUDIO_HDCP_MASK)
DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
if (pch_iir & SDE_AUDIO_TRANS_MASK)
DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
if (pch_iir & SDE_POISON)
DRM_ERROR("PCH poison interrupt\n");
if (pch_iir & SDE_FDI_MASK)
for_each_pipe(pipe)
DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
pipe_name(pipe),
I915_READ(FDI_RX_IIR(pipe)));
if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
if (pch_iir & SDE_TRANSB_FIFO_UNDER)
DRM_DEBUG_DRIVER("PCH transcoder B underrun interrupt\n");
if (pch_iir & SDE_TRANSA_FIFO_UNDER)
DRM_DEBUG_DRIVER("PCH transcoder A underrun interrupt\n");
}
static irqreturn_t ivybridge_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 de_iir, gt_iir, de_ier, pm_iir;
irqreturn_t ret = IRQ_NONE;
int i;
atomic_inc(&dev_priv->irq_received);
/* disable master interrupt before clearing iir */
de_ier = I915_READ(DEIER);
I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
gt_iir = I915_READ(GTIIR);
if (gt_iir) {
snb_gt_irq_handler(dev, dev_priv, gt_iir);
I915_WRITE(GTIIR, gt_iir);
ret = IRQ_HANDLED;
}
de_iir = I915_READ(DEIIR);
if (de_iir) {
if (de_iir & DE_GSE_IVB)
intel_opregion_gse_intr(dev);
for (i = 0; i < 3; i++) {
if (de_iir & (DE_PLANEA_FLIP_DONE_IVB << (5 * i))) {
intel_prepare_page_flip(dev, i);
intel_finish_page_flip_plane(dev, i);
}
if (de_iir & (DE_PIPEA_VBLANK_IVB << (5 * i)))
drm_handle_vblank(dev, i);
}
/* check event from PCH */
if (de_iir & DE_PCH_EVENT_IVB) {
u32 pch_iir = I915_READ(SDEIIR);
if (pch_iir & SDE_HOTPLUG_MASK_CPT)
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
pch_irq_handler(dev, pch_iir);
/* clear PCH hotplug event before clear CPU irq */
I915_WRITE(SDEIIR, pch_iir);
}
I915_WRITE(DEIIR, de_iir);
ret = IRQ_HANDLED;
}
pm_iir = I915_READ(GEN6_PMIIR);
if (pm_iir) {
if (pm_iir & GEN6_PM_DEFERRED_EVENTS)
gen6_queue_rps_work(dev_priv, pm_iir);
I915_WRITE(GEN6_PMIIR, pm_iir);
ret = IRQ_HANDLED;
}
I915_WRITE(DEIER, de_ier);
POSTING_READ(DEIER);
return ret;
}
static void ilk_gt_irq_handler(struct drm_device *dev,
struct drm_i915_private *dev_priv,
u32 gt_iir)
{
if (gt_iir & (GT_USER_INTERRUPT | GT_PIPE_NOTIFY))
notify_ring(dev, &dev_priv->ring[RCS]);
if (gt_iir & GT_BSD_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[VCS]);
}
static irqreturn_t ironlake_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = IRQ_NONE;
u32 de_iir, gt_iir, de_ier, pch_iir, pm_iir;
u32 hotplug_mask;
atomic_inc(&dev_priv->irq_received);
/* disable master interrupt before clearing iir */
de_ier = I915_READ(DEIER);
I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
POSTING_READ(DEIER);
de_iir = I915_READ(DEIIR);
gt_iir = I915_READ(GTIIR);
pch_iir = I915_READ(SDEIIR);
pm_iir = I915_READ(GEN6_PMIIR);
if (de_iir == 0 && gt_iir == 0 && pch_iir == 0 &&
(!IS_GEN6(dev) || pm_iir == 0))
goto done;
if (HAS_PCH_CPT(dev))
hotplug_mask = SDE_HOTPLUG_MASK_CPT;
else
hotplug_mask = SDE_HOTPLUG_MASK;
ret = IRQ_HANDLED;
if (IS_GEN5(dev))
ilk_gt_irq_handler(dev, dev_priv, gt_iir);
else
snb_gt_irq_handler(dev, dev_priv, gt_iir);
if (de_iir & DE_GSE)
intel_opregion_gse_intr(dev);
if (de_iir & DE_PLANEA_FLIP_DONE) {
intel_prepare_page_flip(dev, 0);
intel_finish_page_flip_plane(dev, 0);
}
if (de_iir & DE_PLANEB_FLIP_DONE) {
intel_prepare_page_flip(dev, 1);
intel_finish_page_flip_plane(dev, 1);
}
if (de_iir & DE_PIPEA_VBLANK)
drm_handle_vblank(dev, 0);
if (de_iir & DE_PIPEB_VBLANK)
drm_handle_vblank(dev, 1);
/* check event from PCH */
if (de_iir & DE_PCH_EVENT) {
if (pch_iir & hotplug_mask)
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
pch_irq_handler(dev, pch_iir);
}
if (de_iir & DE_PCU_EVENT) {
I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
i915_handle_rps_change(dev);
}
if (IS_GEN6(dev) && pm_iir & GEN6_PM_DEFERRED_EVENTS)
gen6_queue_rps_work(dev_priv, pm_iir);
/* should clear PCH hotplug event before clear CPU irq */
I915_WRITE(SDEIIR, pch_iir);
I915_WRITE(GTIIR, gt_iir);
I915_WRITE(DEIIR, de_iir);
I915_WRITE(GEN6_PMIIR, pm_iir);
done:
I915_WRITE(DEIER, de_ier);
POSTING_READ(DEIER);
return ret;
}
/**
* i915_error_work_func - do process context error handling work
* @work: work struct
*
* Fire an error uevent so userspace can see that a hang or error
* was detected.
*/
static void i915_error_work_func(struct work_struct *work)
{
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
error_work);
struct drm_device *dev = dev_priv->dev;
char *error_event[] = { "ERROR=1", NULL };
char *reset_event[] = { "RESET=1", NULL };
char *reset_done_event[] = { "ERROR=0", NULL };
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
if (atomic_read(&dev_priv->mm.wedged)) {
DRM_DEBUG_DRIVER("resetting chip\n");
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
if (!i915_reset(dev)) {
atomic_set(&dev_priv->mm.wedged, 0);
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
}
complete_all(&dev_priv->error_completion);
}
}
#ifdef CONFIG_DEBUG_FS
static struct drm_i915_error_object *
i915_error_object_create(struct drm_i915_private *dev_priv,
struct drm_i915_gem_object *src)
{
struct drm_i915_error_object *dst;
int page, page_count;
u32 reloc_offset;
if (src == NULL || src->pages == NULL)
return NULL;
page_count = src->base.size / PAGE_SIZE;
dst = kmalloc(sizeof(*dst) + page_count * sizeof(u32 *), GFP_ATOMIC);
if (dst == NULL)
return NULL;
reloc_offset = src->gtt_offset;
for (page = 0; page < page_count; page++) {
unsigned long flags;
void *d;
d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
if (d == NULL)
goto unwind;
local_irq_save(flags);
if (reloc_offset < dev_priv->mm.gtt_mappable_end &&
src->has_global_gtt_mapping) {
void __iomem *s;
/* Simply ignore tiling or any overlapping fence.
* It's part of the error state, and this hopefully
* captures what the GPU read.
*/
s = io_mapping_map_atomic_wc(dev_priv->mm.gtt_mapping,
reloc_offset);
memcpy_fromio(d, s, PAGE_SIZE);
io_mapping_unmap_atomic(s);
} else {
void *s;
drm_clflush_pages(&src->pages[page], 1);
s = kmap_atomic(src->pages[page]);
memcpy(d, s, PAGE_SIZE);
kunmap_atomic(s);
drm_clflush_pages(&src->pages[page], 1);
}
local_irq_restore(flags);
dst->pages[page] = d;
reloc_offset += PAGE_SIZE;
}
dst->page_count = page_count;
dst->gtt_offset = src->gtt_offset;
return dst;
unwind:
while (page--)
kfree(dst->pages[page]);
kfree(dst);
return NULL;
}
static void
i915_error_object_free(struct drm_i915_error_object *obj)
{
int page;
if (obj == NULL)
return;
for (page = 0; page < obj->page_count; page++)
kfree(obj->pages[page]);
kfree(obj);
}
void
i915_error_state_free(struct kref *error_ref)
{
struct drm_i915_error_state *error = container_of(error_ref,
typeof(*error), ref);
int i;
for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
i915_error_object_free(error->ring[i].batchbuffer);
i915_error_object_free(error->ring[i].ringbuffer);
kfree(error->ring[i].requests);
}
kfree(error->active_bo);
kfree(error->overlay);
kfree(error);
}
static void capture_bo(struct drm_i915_error_buffer *err,
struct drm_i915_gem_object *obj)
{
err->size = obj->base.size;
err->name = obj->base.name;
err->seqno = obj->last_rendering_seqno;
err->gtt_offset = obj->gtt_offset;
err->read_domains = obj->base.read_domains;
err->write_domain = obj->base.write_domain;
err->fence_reg = obj->fence_reg;
err->pinned = 0;
if (obj->pin_count > 0)
err->pinned = 1;
if (obj->user_pin_count > 0)
err->pinned = -1;
err->tiling = obj->tiling_mode;
err->dirty = obj->dirty;
err->purgeable = obj->madv != I915_MADV_WILLNEED;
err->ring = obj->ring ? obj->ring->id : -1;
err->cache_level = obj->cache_level;
}
static u32 capture_active_bo(struct drm_i915_error_buffer *err,
int count, struct list_head *head)
{
struct drm_i915_gem_object *obj;
int i = 0;
list_for_each_entry(obj, head, mm_list) {
capture_bo(err++, obj);
if (++i == count)
break;
}
return i;
}
static u32 capture_pinned_bo(struct drm_i915_error_buffer *err,
int count, struct list_head *head)
{
struct drm_i915_gem_object *obj;
int i = 0;
list_for_each_entry(obj, head, gtt_list) {
if (obj->pin_count == 0)
continue;
capture_bo(err++, obj);
if (++i == count)
break;
}
return i;
}
static void i915_gem_record_fences(struct drm_device *dev,
struct drm_i915_error_state *error)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
/* Fences */
switch (INTEL_INFO(dev)->gen) {
case 7:
case 6:
for (i = 0; i < 16; i++)
error->fence[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
break;
case 5:
case 4:
for (i = 0; i < 16; i++)
error->fence[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
break;
case 3:
if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
for (i = 0; i < 8; i++)
error->fence[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
case 2:
for (i = 0; i < 8; i++)
error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
break;
}
}
static struct drm_i915_error_object *
i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
struct intel_ring_buffer *ring)
{
struct drm_i915_gem_object *obj;
u32 seqno;
if (!ring->get_seqno)
return NULL;
seqno = ring->get_seqno(ring);
list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
if (obj->ring != ring)
continue;
if (i915_seqno_passed(seqno, obj->last_rendering_seqno))
continue;
if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
continue;
/* We need to copy these to an anonymous buffer as the simplest
* method to avoid being overwritten by userspace.
*/
return i915_error_object_create(dev_priv, obj);
}
return NULL;
}
static void i915_record_ring_state(struct drm_device *dev,
struct drm_i915_error_state *error,
struct intel_ring_buffer *ring)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (INTEL_INFO(dev)->gen >= 6) {
error->fault_reg[ring->id] = I915_READ(RING_FAULT_REG(ring));
error->semaphore_mboxes[ring->id][0]
= I915_READ(RING_SYNC_0(ring->mmio_base));
error->semaphore_mboxes[ring->id][1]
= I915_READ(RING_SYNC_1(ring->mmio_base));
}
if (INTEL_INFO(dev)->gen >= 4) {
error->faddr[ring->id] = I915_READ(RING_DMA_FADD(ring->mmio_base));
error->ipeir[ring->id] = I915_READ(RING_IPEIR(ring->mmio_base));
error->ipehr[ring->id] = I915_READ(RING_IPEHR(ring->mmio_base));
error->instdone[ring->id] = I915_READ(RING_INSTDONE(ring->mmio_base));
error->instps[ring->id] = I915_READ(RING_INSTPS(ring->mmio_base));
if (ring->id == RCS) {
error->instdone1 = I915_READ(INSTDONE1);
error->bbaddr = I915_READ64(BB_ADDR);
}
} else {
error->faddr[ring->id] = I915_READ(DMA_FADD_I8XX);
error->ipeir[ring->id] = I915_READ(IPEIR);
error->ipehr[ring->id] = I915_READ(IPEHR);
error->instdone[ring->id] = I915_READ(INSTDONE);
}
error->waiting[ring->id] = waitqueue_active(&ring->irq_queue);
error->instpm[ring->id] = I915_READ(RING_INSTPM(ring->mmio_base));
error->seqno[ring->id] = ring->get_seqno(ring);
error->acthd[ring->id] = intel_ring_get_active_head(ring);
error->head[ring->id] = I915_READ_HEAD(ring);
error->tail[ring->id] = I915_READ_TAIL(ring);
error->cpu_ring_head[ring->id] = ring->head;
error->cpu_ring_tail[ring->id] = ring->tail;
}
static void i915_gem_record_rings(struct drm_device *dev,
struct drm_i915_error_state *error)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring;
struct drm_i915_gem_request *request;
int i, count;
for_each_ring(ring, dev_priv, i) {
i915_record_ring_state(dev, error, ring);
error->ring[i].batchbuffer =
i915_error_first_batchbuffer(dev_priv, ring);
error->ring[i].ringbuffer =
i915_error_object_create(dev_priv, ring->obj);
count = 0;
list_for_each_entry(request, &ring->request_list, list)
count++;
error->ring[i].num_requests = count;
error->ring[i].requests =
kmalloc(count*sizeof(struct drm_i915_error_request),
GFP_ATOMIC);
if (error->ring[i].requests == NULL) {
error->ring[i].num_requests = 0;
continue;
}
count = 0;
list_for_each_entry(request, &ring->request_list, list) {
struct drm_i915_error_request *erq;
erq = &error->ring[i].requests[count++];
erq->seqno = request->seqno;
erq->jiffies = request->emitted_jiffies;
erq->tail = request->tail;
}
}
}
/**
* i915_capture_error_state - capture an error record for later analysis
* @dev: drm device
*
* Should be called when an error is detected (either a hang or an error
* interrupt) to capture error state from the time of the error. Fills
* out a structure which becomes available in debugfs for user level tools
* to pick up.
*/
static void i915_capture_error_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj;
struct drm_i915_error_state *error;
unsigned long flags;
int i, pipe;
spin_lock_irqsave(&dev_priv->error_lock, flags);
error = dev_priv->first_error;
spin_unlock_irqrestore(&dev_priv->error_lock, flags);
if (error)
return;
/* Account for pipe specific data like PIPE*STAT */
error = kzalloc(sizeof(*error), GFP_ATOMIC);
if (!error) {
DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
return;
}
DRM_INFO("capturing error event; look for more information in /debug/dri/%d/i915_error_state\n",
dev->primary->index);
kref_init(&error->ref);
error->eir = I915_READ(EIR);
error->pgtbl_er = I915_READ(PGTBL_ER);
if (HAS_PCH_SPLIT(dev))
error->ier = I915_READ(DEIER) | I915_READ(GTIER);
else if (IS_VALLEYVIEW(dev))
error->ier = I915_READ(GTIER) | I915_READ(VLV_IER);
else if (IS_GEN2(dev))
error->ier = I915_READ16(IER);
else
error->ier = I915_READ(IER);
for_each_pipe(pipe)
error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
if (INTEL_INFO(dev)->gen >= 6) {
error->error = I915_READ(ERROR_GEN6);
error->done_reg = I915_READ(DONE_REG);
}
i915_gem_record_fences(dev, error);
i915_gem_record_rings(dev, error);
/* Record buffers on the active and pinned lists. */
error->active_bo = NULL;
error->pinned_bo = NULL;
i = 0;
list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
i++;
error->active_bo_count = i;
list_for_each_entry(obj, &dev_priv->mm.gtt_list, gtt_list)
if (obj->pin_count)
i++;
error->pinned_bo_count = i - error->active_bo_count;
error->active_bo = NULL;
error->pinned_bo = NULL;
if (i) {
error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
GFP_ATOMIC);
if (error->active_bo)
error->pinned_bo =
error->active_bo + error->active_bo_count;
}
if (error->active_bo)
error->active_bo_count =
capture_active_bo(error->active_bo,
error->active_bo_count,
&dev_priv->mm.active_list);
if (error->pinned_bo)
error->pinned_bo_count =
capture_pinned_bo(error->pinned_bo,
error->pinned_bo_count,
&dev_priv->mm.gtt_list);
do_gettimeofday(&error->time);
error->overlay = intel_overlay_capture_error_state(dev);
error->display = intel_display_capture_error_state(dev);
spin_lock_irqsave(&dev_priv->error_lock, flags);
if (dev_priv->first_error == NULL) {
dev_priv->first_error = error;
error = NULL;
}
spin_unlock_irqrestore(&dev_priv->error_lock, flags);
if (error)
i915_error_state_free(&error->ref);
}
void i915_destroy_error_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_error_state *error;
unsigned long flags;
spin_lock_irqsave(&dev_priv->error_lock, flags);
error = dev_priv->first_error;
dev_priv->first_error = NULL;
spin_unlock_irqrestore(&dev_priv->error_lock, flags);
if (error)
kref_put(&error->ref, i915_error_state_free);
}
#else
#define i915_capture_error_state(x)
#endif
static void i915_report_and_clear_eir(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 eir = I915_READ(EIR);
int pipe;
if (!eir)
return;
pr_err("render error detected, EIR: 0x%08x\n", eir);
if (IS_G4X(dev)) {
if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
u32 ipeir = I915_READ(IPEIR_I965);
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
pr_err(" INSTDONE: 0x%08x\n",
I915_READ(INSTDONE_I965));
pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
pr_err(" INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1));
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
I915_WRITE(IPEIR_I965, ipeir);
POSTING_READ(IPEIR_I965);
}
if (eir & GM45_ERROR_PAGE_TABLE) {
u32 pgtbl_err = I915_READ(PGTBL_ER);
pr_err("page table error\n");
pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
I915_WRITE(PGTBL_ER, pgtbl_err);
POSTING_READ(PGTBL_ER);
}
}
if (!IS_GEN2(dev)) {
if (eir & I915_ERROR_PAGE_TABLE) {
u32 pgtbl_err = I915_READ(PGTBL_ER);
pr_err("page table error\n");
pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
I915_WRITE(PGTBL_ER, pgtbl_err);
POSTING_READ(PGTBL_ER);
}
}
if (eir & I915_ERROR_MEMORY_REFRESH) {
pr_err("memory refresh error:\n");
for_each_pipe(pipe)
pr_err("pipe %c stat: 0x%08x\n",
pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
/* pipestat has already been acked */
}
if (eir & I915_ERROR_INSTRUCTION) {
pr_err("instruction error\n");
pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
if (INTEL_INFO(dev)->gen < 4) {
u32 ipeir = I915_READ(IPEIR);
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
pr_err(" INSTDONE: 0x%08x\n", I915_READ(INSTDONE));
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
I915_WRITE(IPEIR, ipeir);
POSTING_READ(IPEIR);
} else {
u32 ipeir = I915_READ(IPEIR_I965);
pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
pr_err(" INSTDONE: 0x%08x\n",
I915_READ(INSTDONE_I965));
pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
pr_err(" INSTDONE1: 0x%08x\n", I915_READ(INSTDONE1));
pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
I915_WRITE(IPEIR_I965, ipeir);
POSTING_READ(IPEIR_I965);
}
}
I915_WRITE(EIR, eir);
POSTING_READ(EIR);
eir = I915_READ(EIR);
if (eir) {
/*
* some errors might have become stuck,
* mask them.
*/
DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
I915_WRITE(EMR, I915_READ(EMR) | eir);
I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
}
}
/**
* i915_handle_error - handle an error interrupt
* @dev: drm device
*
* Do some basic checking of regsiter state at error interrupt time and
* dump it to the syslog. Also call i915_capture_error_state() to make
* sure we get a record and make it available in debugfs. Fire a uevent
* so userspace knows something bad happened (should trigger collection
* of a ring dump etc.).
*/
void i915_handle_error(struct drm_device *dev, bool wedged)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring;
int i;
i915_capture_error_state(dev);
i915_report_and_clear_eir(dev);
if (wedged) {
INIT_COMPLETION(dev_priv->error_completion);
atomic_set(&dev_priv->mm.wedged, 1);
/*
* Wakeup waiting processes so they don't hang
*/
for_each_ring(ring, dev_priv, i)
wake_up_all(&ring->irq_queue);
}
queue_work(dev_priv->wq, &dev_priv->error_work);
}
static void i915_pageflip_stall_check(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_i915_gem_object *obj;
struct intel_unpin_work *work;
unsigned long flags;
bool stall_detected;
/* Ignore early vblank irqs */
if (intel_crtc == NULL)
return;
spin_lock_irqsave(&dev->event_lock, flags);
work = intel_crtc->unpin_work;
if (work == NULL || work->pending || !work->enable_stall_check) {
/* Either the pending flip IRQ arrived, or we're too early. Don't check */
spin_unlock_irqrestore(&dev->event_lock, flags);
return;
}
/* Potential stall - if we see that the flip has happened, assume a missed interrupt */
obj = work->pending_flip_obj;
if (INTEL_INFO(dev)->gen >= 4) {
int dspsurf = DSPSURF(intel_crtc->plane);
stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
obj->gtt_offset;
} else {
int dspaddr = DSPADDR(intel_crtc->plane);
stall_detected = I915_READ(dspaddr) == (obj->gtt_offset +
crtc->y * crtc->fb->pitches[0] +
crtc->x * crtc->fb->bits_per_pixel/8);
}
spin_unlock_irqrestore(&dev->event_lock, flags);
if (stall_detected) {
DRM_DEBUG_DRIVER("Pageflip stall detected\n");
intel_prepare_page_flip(dev, intel_crtc->plane);
}
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
static int i915_enable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
if (!i915_pipe_enabled(dev, pipe))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (INTEL_INFO(dev)->gen >= 4)
i915_enable_pipestat(dev_priv, pipe,
PIPE_START_VBLANK_INTERRUPT_ENABLE);
else
i915_enable_pipestat(dev_priv, pipe,
PIPE_VBLANK_INTERRUPT_ENABLE);
/* maintain vblank delivery even in deep C-states */
if (dev_priv->info->gen == 3)
I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
if (!i915_pipe_enabled(dev, pipe))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int ivybridge_enable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
if (!i915_pipe_enabled(dev, pipe))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ironlake_enable_display_irq(dev_priv,
DE_PIPEA_VBLANK_IVB << (5 * pipe));
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
u32 dpfl, imr;
if (!i915_pipe_enabled(dev, pipe))
return -EINVAL;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
dpfl = I915_READ(VLV_DPFLIPSTAT);
imr = I915_READ(VLV_IMR);
if (pipe == 0) {
dpfl |= PIPEA_VBLANK_INT_EN;
imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
} else {
dpfl |= PIPEA_VBLANK_INT_EN;
imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
}
I915_WRITE(VLV_DPFLIPSTAT, dpfl);
I915_WRITE(VLV_IMR, imr);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
static void i915_disable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (dev_priv->info->gen == 3)
I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
i915_disable_pipestat(dev_priv, pipe,
PIPE_VBLANK_INTERRUPT_ENABLE |
PIPE_START_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
DE_PIPEA_VBLANK : DE_PIPEB_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void ivybridge_disable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ironlake_disable_display_irq(dev_priv,
DE_PIPEA_VBLANK_IVB << (pipe * 5));
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
u32 dpfl, imr;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
dpfl = I915_READ(VLV_DPFLIPSTAT);
imr = I915_READ(VLV_IMR);
if (pipe == 0) {
dpfl &= ~PIPEA_VBLANK_INT_EN;
imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
} else {
dpfl &= ~PIPEB_VBLANK_INT_EN;
imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
}
I915_WRITE(VLV_IMR, imr);
I915_WRITE(VLV_DPFLIPSTAT, dpfl);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static u32
ring_last_seqno(struct intel_ring_buffer *ring)
{
return list_entry(ring->request_list.prev,
struct drm_i915_gem_request, list)->seqno;
}
static bool i915_hangcheck_ring_idle(struct intel_ring_buffer *ring, bool *err)
{
if (list_empty(&ring->request_list) ||
i915_seqno_passed(ring->get_seqno(ring), ring_last_seqno(ring))) {
/* Issue a wake-up to catch stuck h/w. */
if (waitqueue_active(&ring->irq_queue)) {
DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
ring->name);
wake_up_all(&ring->irq_queue);
*err = true;
}
return true;
}
return false;
}
static bool kick_ring(struct intel_ring_buffer *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 tmp = I915_READ_CTL(ring);
if (tmp & RING_WAIT) {
DRM_ERROR("Kicking stuck wait on %s\n",
ring->name);
I915_WRITE_CTL(ring, tmp);
return true;
}
return false;
}
static bool i915_hangcheck_hung(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
if (dev_priv->hangcheck_count++ > 1) {
bool hung = true;
DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
i915_handle_error(dev, true);
if (!IS_GEN2(dev)) {
struct intel_ring_buffer *ring;
int i;
/* Is the chip hanging on a WAIT_FOR_EVENT?
* If so we can simply poke the RB_WAIT bit
* and break the hang. This should work on
* all but the second generation chipsets.
*/
for_each_ring(ring, dev_priv, i)
hung &= !kick_ring(ring);
}
return hung;
}
return false;
}
/**
* This is called when the chip hasn't reported back with completed
* batchbuffers in a long time. The first time this is called we simply record
* ACTHD. If ACTHD hasn't changed by the time the hangcheck timer elapses
* again, we assume the chip is wedged and try to fix it.
*/
void i915_hangcheck_elapsed(unsigned long data)
{
struct drm_device *dev = (struct drm_device *)data;
drm_i915_private_t *dev_priv = dev->dev_private;
uint32_t acthd[I915_NUM_RINGS], instdone, instdone1;
struct intel_ring_buffer *ring;
bool err = false, idle;
int i;
if (!i915_enable_hangcheck)
return;
memset(acthd, 0, sizeof(acthd));
idle = true;
for_each_ring(ring, dev_priv, i) {
idle &= i915_hangcheck_ring_idle(ring, &err);
acthd[i] = intel_ring_get_active_head(ring);
}
/* If all work is done then ACTHD clearly hasn't advanced. */
if (idle) {
if (err) {
if (i915_hangcheck_hung(dev))
return;
goto repeat;
}
dev_priv->hangcheck_count = 0;
return;
}
if (INTEL_INFO(dev)->gen < 4) {
instdone = I915_READ(INSTDONE);
instdone1 = 0;
} else {
instdone = I915_READ(INSTDONE_I965);
instdone1 = I915_READ(INSTDONE1);
}
if (memcmp(dev_priv->last_acthd, acthd, sizeof(acthd)) == 0 &&
dev_priv->last_instdone == instdone &&
dev_priv->last_instdone1 == instdone1) {
if (i915_hangcheck_hung(dev))
return;
} else {
dev_priv->hangcheck_count = 0;
memcpy(dev_priv->last_acthd, acthd, sizeof(acthd));
dev_priv->last_instdone = instdone;
dev_priv->last_instdone1 = instdone1;
}
repeat:
/* Reset timer case chip hangs without another request being added */
mod_timer(&dev_priv->hangcheck_timer,
jiffies + msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD));
}
/* drm_dma.h hooks
*/
static void ironlake_irq_preinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
atomic_set(&dev_priv->irq_received, 0);
I915_WRITE(HWSTAM, 0xeffe);
/* XXX hotplug from PCH */
I915_WRITE(DEIMR, 0xffffffff);
I915_WRITE(DEIER, 0x0);
POSTING_READ(DEIER);
/* and GT */
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
POSTING_READ(GTIER);
/* south display irq */
I915_WRITE(SDEIMR, 0xffffffff);
I915_WRITE(SDEIER, 0x0);
POSTING_READ(SDEIER);
}
static void valleyview_irq_preinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
atomic_set(&dev_priv->irq_received, 0);
/* VLV magic */
I915_WRITE(VLV_IMR, 0);
I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
/* and GT */
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
POSTING_READ(GTIER);
I915_WRITE(DPINVGTT, 0xff);
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0xffff);
I915_WRITE(VLV_IIR, 0xffffffff);
I915_WRITE(VLV_IMR, 0xffffffff);
I915_WRITE(VLV_IER, 0x0);
POSTING_READ(VLV_IER);
}
/*
* Enable digital hotplug on the PCH, and configure the DP short pulse
* duration to 2ms (which is the minimum in the Display Port spec)
*
* This register is the same on all known PCH chips.
*/
static void ironlake_enable_pch_hotplug(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 hotplug;
hotplug = I915_READ(PCH_PORT_HOTPLUG);
hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
}
static int ironlake_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
/* enable kind of interrupts always enabled */
u32 display_mask = DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE;
u32 render_irqs;
u32 hotplug_mask;
dev_priv->irq_mask = ~display_mask;
/* should always can generate irq */
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(DEIMR, dev_priv->irq_mask);
I915_WRITE(DEIER, display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK);
POSTING_READ(DEIER);
dev_priv->gt_irq_mask = ~0;
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
if (IS_GEN6(dev))
render_irqs =
GT_USER_INTERRUPT |
GEN6_BSD_USER_INTERRUPT |
GEN6_BLITTER_USER_INTERRUPT;
else
render_irqs =
GT_USER_INTERRUPT |
GT_PIPE_NOTIFY |
GT_BSD_USER_INTERRUPT;
I915_WRITE(GTIER, render_irqs);
POSTING_READ(GTIER);
if (HAS_PCH_CPT(dev)) {
hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
SDE_PORTB_HOTPLUG_CPT |
SDE_PORTC_HOTPLUG_CPT |
SDE_PORTD_HOTPLUG_CPT);
} else {
hotplug_mask = (SDE_CRT_HOTPLUG |
SDE_PORTB_HOTPLUG |
SDE_PORTC_HOTPLUG |
SDE_PORTD_HOTPLUG |
SDE_AUX_MASK);
}
dev_priv->pch_irq_mask = ~hotplug_mask;
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
I915_WRITE(SDEIER, hotplug_mask);
POSTING_READ(SDEIER);
ironlake_enable_pch_hotplug(dev);
if (IS_IRONLAKE_M(dev)) {
/* Clear & enable PCU event interrupts */
I915_WRITE(DEIIR, DE_PCU_EVENT);
I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT);
ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
}
return 0;
}
static int ivybridge_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
/* enable kind of interrupts always enabled */
u32 display_mask =
DE_MASTER_IRQ_CONTROL | DE_GSE_IVB | DE_PCH_EVENT_IVB |
DE_PLANEC_FLIP_DONE_IVB |
DE_PLANEB_FLIP_DONE_IVB |
DE_PLANEA_FLIP_DONE_IVB;
u32 render_irqs;
u32 hotplug_mask;
dev_priv->irq_mask = ~display_mask;
/* should always can generate irq */
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(DEIMR, dev_priv->irq_mask);
I915_WRITE(DEIER,
display_mask |
DE_PIPEC_VBLANK_IVB |
DE_PIPEB_VBLANK_IVB |
DE_PIPEA_VBLANK_IVB);
POSTING_READ(DEIER);
dev_priv->gt_irq_mask = ~0;
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
render_irqs = GT_USER_INTERRUPT | GEN6_BSD_USER_INTERRUPT |
GEN6_BLITTER_USER_INTERRUPT;
I915_WRITE(GTIER, render_irqs);
POSTING_READ(GTIER);
hotplug_mask = (SDE_CRT_HOTPLUG_CPT |
SDE_PORTB_HOTPLUG_CPT |
SDE_PORTC_HOTPLUG_CPT |
SDE_PORTD_HOTPLUG_CPT);
dev_priv->pch_irq_mask = ~hotplug_mask;
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
I915_WRITE(SDEIMR, dev_priv->pch_irq_mask);
I915_WRITE(SDEIER, hotplug_mask);
POSTING_READ(SDEIER);
ironlake_enable_pch_hotplug(dev);
return 0;
}
static int valleyview_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 render_irqs;
u32 enable_mask;
u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
u16 msid;
enable_mask = I915_DISPLAY_PORT_INTERRUPT;
enable_mask |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
dev_priv->irq_mask = ~enable_mask;
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
/* Hack for broken MSIs on VLV */
pci_write_config_dword(dev_priv->dev->pdev, 0x94, 0xfee00000);
pci_read_config_word(dev->pdev, 0x98, &msid);
msid &= 0xff; /* mask out delivery bits */
msid |= (1<<14);
pci_write_config_word(dev_priv->dev->pdev, 0x98, msid);
I915_WRITE(VLV_IMR, dev_priv->irq_mask);
I915_WRITE(VLV_IER, enable_mask);
I915_WRITE(VLV_IIR, 0xffffffff);
I915_WRITE(PIPESTAT(0), 0xffff);
I915_WRITE(PIPESTAT(1), 0xffff);
POSTING_READ(VLV_IER);
I915_WRITE(VLV_IIR, 0xffffffff);
I915_WRITE(VLV_IIR, 0xffffffff);
render_irqs = GT_GEN6_BLT_FLUSHDW_NOTIFY_INTERRUPT |
GT_GEN6_BLT_CS_ERROR_INTERRUPT |
GT_GEN6_BLT_USER_INTERRUPT |
GT_GEN6_BSD_USER_INTERRUPT |
GT_GEN6_BSD_CS_ERROR_INTERRUPT |
GT_GEN7_L3_PARITY_ERROR_INTERRUPT |
GT_PIPE_NOTIFY |
GT_RENDER_CS_ERROR_INTERRUPT |
GT_SYNC_STATUS |
GT_USER_INTERRUPT;
dev_priv->gt_irq_mask = ~render_irqs;
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, 0);
I915_WRITE(GTIER, render_irqs);
POSTING_READ(GTIER);
/* ack & enable invalid PTE error interrupts */
#if 0 /* FIXME: add support to irq handler for checking these bits */
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
#endif
I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
#if 0 /* FIXME: check register definitions; some have moved */
/* Note HDMI and DP share bits */
if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
hotplug_en |= HDMID_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
hotplug_en |= CRT_HOTPLUG_INT_EN;
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
}
#endif
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
return 0;
}
static void valleyview_irq_uninstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
if (!dev_priv)
return;
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0xffff);
I915_WRITE(HWSTAM, 0xffffffff);
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0xffff);
I915_WRITE(VLV_IIR, 0xffffffff);
I915_WRITE(VLV_IMR, 0xffffffff);
I915_WRITE(VLV_IER, 0x0);
POSTING_READ(VLV_IER);
}
static void ironlake_irq_uninstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
if (!dev_priv)
return;
I915_WRITE(HWSTAM, 0xffffffff);
I915_WRITE(DEIMR, 0xffffffff);
I915_WRITE(DEIER, 0x0);
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(SDEIMR, 0xffffffff);
I915_WRITE(SDEIER, 0x0);
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
}
static void i8xx_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
atomic_set(&dev_priv->irq_received, 0);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE16(IMR, 0xffff);
I915_WRITE16(IER, 0x0);
POSTING_READ16(IER);
}
static int i8xx_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
I915_WRITE16(EMR,
~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask =
~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
I915_WRITE16(IMR, dev_priv->irq_mask);
I915_WRITE16(IER,
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
I915_USER_INTERRUPT);
POSTING_READ16(IER);
return 0;
}
static irqreturn_t i8xx_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u16 iir, new_iir;
u32 pipe_stats[2];
unsigned long irqflags;
int irq_received;
int pipe;
u16 flip_mask =
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
atomic_inc(&dev_priv->irq_received);
iir = I915_READ16(IIR);
if (iir == 0)
return IRQ_NONE;
while (iir & ~flip_mask) {
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
i915_handle_error(dev, false);
for_each_pipe(pipe) {
int reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & 0x8000ffff) {
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe %c underrun\n",
pipe_name(pipe));
I915_WRITE(reg, pipe_stats[pipe]);
irq_received = 1;
}
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
I915_WRITE16(IIR, iir & ~flip_mask);
new_iir = I915_READ16(IIR); /* Flush posted writes */
i915_update_dri1_breadcrumb(dev);
if (iir & I915_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[RCS]);
if (pipe_stats[0] & PIPE_VBLANK_INTERRUPT_STATUS &&
drm_handle_vblank(dev, 0)) {
if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) {
intel_prepare_page_flip(dev, 0);
intel_finish_page_flip(dev, 0);
flip_mask &= ~I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
}
}
if (pipe_stats[1] & PIPE_VBLANK_INTERRUPT_STATUS &&
drm_handle_vblank(dev, 1)) {
if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) {
intel_prepare_page_flip(dev, 1);
intel_finish_page_flip(dev, 1);
flip_mask &= ~I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
}
}
iir = new_iir;
}
return IRQ_HANDLED;
}
static void i8xx_irq_uninstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
for_each_pipe(pipe) {
/* Clear enable bits; then clear status bits */
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
}
I915_WRITE16(IMR, 0xffff);
I915_WRITE16(IER, 0x0);
I915_WRITE16(IIR, I915_READ16(IIR));
}
static void i915_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
atomic_set(&dev_priv->irq_received, 0);
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE16(HWSTAM, 0xeffe);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
POSTING_READ(IER);
}
static int i915_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 enable_mask;
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask =
~(I915_ASLE_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
enable_mask =
I915_ASLE_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
I915_USER_INTERRUPT;
if (I915_HAS_HOTPLUG(dev)) {
/* Enable in IER... */
enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
/* and unmask in IMR */
dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
}
I915_WRITE(IMR, dev_priv->irq_mask);
I915_WRITE(IER, enable_mask);
POSTING_READ(IER);
if (I915_HAS_HOTPLUG(dev)) {
u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
hotplug_en |= HDMID_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
hotplug_en |= CRT_HOTPLUG_INT_EN;
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
}
/* Ignore TV since it's buggy */
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
}
intel_opregion_enable_asle(dev);
return 0;
}
static irqreturn_t i915_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
unsigned long irqflags;
u32 flip_mask =
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
u32 flip[2] = {
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT,
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
};
int pipe, ret = IRQ_NONE;
atomic_inc(&dev_priv->irq_received);
iir = I915_READ(IIR);
do {
bool irq_received = (iir & ~flip_mask) != 0;
bool blc_event = false;
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
i915_handle_error(dev, false);
for_each_pipe(pipe) {
int reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/* Clear the PIPE*STAT regs before the IIR */
if (pipe_stats[pipe] & 0x8000ffff) {
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe %c underrun\n",
pipe_name(pipe));
I915_WRITE(reg, pipe_stats[pipe]);
irq_received = true;
}
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
if (!irq_received)
break;
/* Consume port. Then clear IIR or we'll miss events */
if ((I915_HAS_HOTPLUG(dev)) &&
(iir & I915_DISPLAY_PORT_INTERRUPT)) {
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_status & dev_priv->hotplug_supported_mask)
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
POSTING_READ(PORT_HOTPLUG_STAT);
}
I915_WRITE(IIR, iir & ~flip_mask);
new_iir = I915_READ(IIR); /* Flush posted writes */
if (iir & I915_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[RCS]);
for_each_pipe(pipe) {
int plane = pipe;
if (IS_MOBILE(dev))
plane = !plane;
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
drm_handle_vblank(dev, pipe)) {
if (iir & flip[plane]) {
intel_prepare_page_flip(dev, plane);
intel_finish_page_flip(dev, pipe);
flip_mask &= ~flip[plane];
}
}
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
blc_event = true;
}
if (blc_event || (iir & I915_ASLE_INTERRUPT))
intel_opregion_asle_intr(dev);
/* With MSI, interrupts are only generated when iir
* transitions from zero to nonzero. If another bit got
* set while we were handling the existing iir bits, then
* we would never get another interrupt.
*
* This is fine on non-MSI as well, as if we hit this path
* we avoid exiting the interrupt handler only to generate
* another one.
*
* Note that for MSI this could cause a stray interrupt report
* if an interrupt landed in the time between writing IIR and
* the posting read. This should be rare enough to never
* trigger the 99% of 100,000 interrupts test for disabling
* stray interrupts.
*/
ret = IRQ_HANDLED;
iir = new_iir;
} while (iir & ~flip_mask);
i915_update_dri1_breadcrumb(dev);
return ret;
}
static void i915_irq_uninstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE16(HWSTAM, 0xffff);
for_each_pipe(pipe) {
/* Clear enable bits; then clear status bits */
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
}
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
I915_WRITE(IIR, I915_READ(IIR));
}
static void i965_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
atomic_set(&dev_priv->irq_received, 0);
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE(HWSTAM, 0xeffe);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
POSTING_READ(IER);
}
static int i965_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 enable_mask;
u32 error_mask;
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
enable_mask = ~dev_priv->irq_mask;
enable_mask |= I915_USER_INTERRUPT;
if (IS_G4X(dev))
enable_mask |= I915_BSD_USER_INTERRUPT;
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
if (I915_HAS_HOTPLUG(dev)) {
/* Enable in IER... */
enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
/* and unmask in IMR */
dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
}
/*
* Enable some error detection, note the instruction error mask
* bit is reserved, so we leave it masked.
*/
if (IS_G4X(dev)) {
error_mask = ~(GM45_ERROR_PAGE_TABLE |
GM45_ERROR_MEM_PRIV |
GM45_ERROR_CP_PRIV |
I915_ERROR_MEMORY_REFRESH);
} else {
error_mask = ~(I915_ERROR_PAGE_TABLE |
I915_ERROR_MEMORY_REFRESH);
}
I915_WRITE(EMR, error_mask);
I915_WRITE(IMR, dev_priv->irq_mask);
I915_WRITE(IER, enable_mask);
POSTING_READ(IER);
if (I915_HAS_HOTPLUG(dev)) {
u32 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
/* Note HDMI and DP share bits */
if (dev_priv->hotplug_supported_mask & HDMIB_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMIC_HOTPLUG_INT_STATUS)
hotplug_en |= HDMIC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & HDMID_HOTPLUG_INT_STATUS)
hotplug_en |= HDMID_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOC_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOC_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
hotplug_en |= SDVOB_HOTPLUG_INT_EN;
if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
hotplug_en |= CRT_HOTPLUG_INT_EN;
/* Programming the CRT detection parameters tends
to generate a spurious hotplug event about three
seconds later. So just do it once.
*/
if (IS_G4X(dev))
hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
}
/* Ignore TV since it's buggy */
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
}
intel_opregion_enable_asle(dev);
return 0;
}
static irqreturn_t i965_irq_handler(DRM_IRQ_ARGS)
{
struct drm_device *dev = (struct drm_device *) arg;
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 iir, new_iir;
u32 pipe_stats[I915_MAX_PIPES];
unsigned long irqflags;
int irq_received;
int ret = IRQ_NONE, pipe;
atomic_inc(&dev_priv->irq_received);
iir = I915_READ(IIR);
for (;;) {
bool blc_event = false;
irq_received = iir != 0;
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
i915_handle_error(dev, false);
for_each_pipe(pipe) {
int reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & 0x8000ffff) {
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe %c underrun\n",
pipe_name(pipe));
I915_WRITE(reg, pipe_stats[pipe]);
irq_received = 1;
}
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
if (!irq_received)
break;
ret = IRQ_HANDLED;
/* Consume port. Then clear IIR or we'll miss events */
if ((I915_HAS_HOTPLUG(dev)) &&
(iir & I915_DISPLAY_PORT_INTERRUPT)) {
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_status & dev_priv->hotplug_supported_mask)
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
I915_READ(PORT_HOTPLUG_STAT);
}
I915_WRITE(IIR, iir);
new_iir = I915_READ(IIR); /* Flush posted writes */
if (iir & I915_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[RCS]);
if (iir & I915_BSD_USER_INTERRUPT)
notify_ring(dev, &dev_priv->ring[VCS]);
if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT)
intel_prepare_page_flip(dev, 0);
if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT)
intel_prepare_page_flip(dev, 1);
for_each_pipe(pipe) {
if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
drm_handle_vblank(dev, pipe)) {
i915_pageflip_stall_check(dev, pipe);
intel_finish_page_flip(dev, pipe);
}
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
blc_event = true;
}
if (blc_event || (iir & I915_ASLE_INTERRUPT))
intel_opregion_asle_intr(dev);
/* With MSI, interrupts are only generated when iir
* transitions from zero to nonzero. If another bit got
* set while we were handling the existing iir bits, then
* we would never get another interrupt.
*
* This is fine on non-MSI as well, as if we hit this path
* we avoid exiting the interrupt handler only to generate
* another one.
*
* Note that for MSI this could cause a stray interrupt report
* if an interrupt landed in the time between writing IIR and
* the posting read. This should be rare enough to never
* trigger the 99% of 100,000 interrupts test for disabling
* stray interrupts.
*/
iir = new_iir;
}
i915_update_dri1_breadcrumb(dev);
return ret;
}
static void i965_irq_uninstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int pipe;
if (!dev_priv)
return;
if (I915_HAS_HOTPLUG(dev)) {
I915_WRITE(PORT_HOTPLUG_EN, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE(HWSTAM, 0xffffffff);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
for_each_pipe(pipe)
I915_WRITE(PIPESTAT(pipe),
I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
I915_WRITE(IIR, I915_READ(IIR));
}
void intel_irq_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
INIT_WORK(&dev_priv->error_work, i915_error_work_func);
INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
dev->driver->get_vblank_counter = i915_get_vblank_counter;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = gm45_get_vblank_counter;
}
if (drm_core_check_feature(dev, DRIVER_MODESET))
dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
else
dev->driver->get_vblank_timestamp = NULL;
dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
if (IS_VALLEYVIEW(dev)) {
dev->driver->irq_handler = valleyview_irq_handler;
dev->driver->irq_preinstall = valleyview_irq_preinstall;
dev->driver->irq_postinstall = valleyview_irq_postinstall;
dev->driver->irq_uninstall = valleyview_irq_uninstall;
dev->driver->enable_vblank = valleyview_enable_vblank;
dev->driver->disable_vblank = valleyview_disable_vblank;
} else if (IS_IVYBRIDGE(dev)) {
/* Share pre & uninstall handlers with ILK/SNB */
dev->driver->irq_handler = ivybridge_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ivybridge_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ivybridge_enable_vblank;
dev->driver->disable_vblank = ivybridge_disable_vblank;
} else if (IS_HASWELL(dev)) {
/* Share interrupts handling with IVB */
dev->driver->irq_handler = ivybridge_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ivybridge_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ivybridge_enable_vblank;
dev->driver->disable_vblank = ivybridge_disable_vblank;
} else if (HAS_PCH_SPLIT(dev)) {
dev->driver->irq_handler = ironlake_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_preinstall;
dev->driver->irq_postinstall = ironlake_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ironlake_enable_vblank;
dev->driver->disable_vblank = ironlake_disable_vblank;
} else {
if (INTEL_INFO(dev)->gen == 2) {
dev->driver->irq_preinstall = i8xx_irq_preinstall;
dev->driver->irq_postinstall = i8xx_irq_postinstall;
dev->driver->irq_handler = i8xx_irq_handler;
dev->driver->irq_uninstall = i8xx_irq_uninstall;
} else if (INTEL_INFO(dev)->gen == 3) {
/* IIR "flip pending" means done if this bit is set */
I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
dev->driver->irq_preinstall = i915_irq_preinstall;
dev->driver->irq_postinstall = i915_irq_postinstall;
dev->driver->irq_uninstall = i915_irq_uninstall;
dev->driver->irq_handler = i915_irq_handler;
} else {
dev->driver->irq_preinstall = i965_irq_preinstall;
dev->driver->irq_postinstall = i965_irq_postinstall;
dev->driver->irq_uninstall = i965_irq_uninstall;
dev->driver->irq_handler = i965_irq_handler;
}
dev->driver->enable_vblank = i915_enable_vblank;
dev->driver->disable_vblank = i915_disable_vblank;
}
}