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linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_irq.c
Zhao Yakui edcb49ca34 drm/i915: Fix legacy BLC event for pipe A 
OpRegion event on 965G requires legacy BLC event enabled in pipe stat. As LVDS
could be on either pipe now, we should enable BLC event on both pipe. If fail to
do so, we couldn't handle the brightness request triggered from graphics
opregion.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
2010-04-12 09:23:37 -07:00

1501 lines
41 KiB
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/* 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.
*
*/
#include <linux/sysrq.h>
#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "i915_trace.h"
#include "intel_drv.h"
#define MAX_NOPID ((u32)~0)
/**
* Interrupts that are always left unmasked.
*
* Since pipe events are edge-triggered from the PIPESTAT register to IIR,
* we leave them always unmasked in IMR and then control enabling them through
* PIPESTAT alone.
*/
#define I915_INTERRUPT_ENABLE_FIX \
(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)
/** Interrupts that we mask and unmask at runtime. */
#define I915_INTERRUPT_ENABLE_VAR (I915_USER_INTERRUPT)
#define I915_PIPE_VBLANK_STATUS (PIPE_START_VBLANK_INTERRUPT_STATUS |\
PIPE_VBLANK_INTERRUPT_STATUS)
#define I915_PIPE_VBLANK_ENABLE (PIPE_START_VBLANK_INTERRUPT_ENABLE |\
PIPE_VBLANK_INTERRUPT_ENABLE)
#define DRM_I915_VBLANK_PIPE_ALL (DRM_I915_VBLANK_PIPE_A | \
DRM_I915_VBLANK_PIPE_B)
void
ironlake_enable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->gt_irq_mask_reg & mask) != 0) {
dev_priv->gt_irq_mask_reg &= ~mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
(void) I915_READ(GTIMR);
}
}
static inline void
ironlake_disable_graphics_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->gt_irq_mask_reg & mask) != mask) {
dev_priv->gt_irq_mask_reg |= mask;
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
(void) I915_READ(GTIMR);
}
}
/* For display hotplug interrupt */
void
ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != 0) {
dev_priv->irq_mask_reg &= ~mask;
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
(void) I915_READ(DEIMR);
}
}
static inline void
ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != mask) {
dev_priv->irq_mask_reg |= mask;
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
(void) I915_READ(DEIMR);
}
}
void
i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != 0) {
dev_priv->irq_mask_reg &= ~mask;
I915_WRITE(IMR, dev_priv->irq_mask_reg);
(void) I915_READ(IMR);
}
}
static inline void
i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
{
if ((dev_priv->irq_mask_reg & mask) != mask) {
dev_priv->irq_mask_reg |= mask;
I915_WRITE(IMR, dev_priv->irq_mask_reg);
(void) I915_READ(IMR);
}
}
static inline u32
i915_pipestat(int pipe)
{
if (pipe == 0)
return PIPEASTAT;
if (pipe == 1)
return PIPEBSTAT;
BUG();
}
void
i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask)
{
if ((dev_priv->pipestat[pipe] & mask) != mask) {
u32 reg = i915_pipestat(pipe);
dev_priv->pipestat[pipe] |= mask;
/* Enable the interrupt, clear any pending status */
I915_WRITE(reg, dev_priv->pipestat[pipe] | (mask >> 16));
(void) I915_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 = i915_pipestat(pipe);
dev_priv->pipestat[pipe] &= ~mask;
I915_WRITE(reg, dev_priv->pipestat[pipe]);
(void) I915_READ(reg);
}
}
/**
* intel_enable_asle - enable ASLE interrupt for OpRegion
*/
void intel_enable_asle (struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
if (HAS_PCH_SPLIT(dev))
ironlake_enable_display_irq(dev_priv, DE_GSE);
else {
i915_enable_pipestat(dev_priv, 1,
I915_LEGACY_BLC_EVENT_ENABLE);
if (IS_I965G(dev))
i915_enable_pipestat(dev_priv, 0,
I915_LEGACY_BLC_EVENT_ENABLE);
}
}
/**
* 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;
unsigned long pipeconf = pipe ? PIPEBCONF : PIPEACONF;
if (I915_READ(pipeconf) & PIPEACONF_ENABLE)
return 1;
return 0;
}
/* Called from drm generic code, passed a 'crtc', which
* we use as a pipe index
*/
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, count;
high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH;
low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL;
if (!i915_pipe_enabled(dev, pipe)) {
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
"pipe %d\n", pipe);
return 0;
}
/*
* 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) >>
PIPE_FRAME_HIGH_SHIFT);
low = ((I915_READ(low_frame) & PIPE_FRAME_LOW_MASK) >>
PIPE_FRAME_LOW_SHIFT);
high2 = ((I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK) >>
PIPE_FRAME_HIGH_SHIFT);
} while (high1 != high2);
count = (high1 << 8) | low;
return count;
}
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 ? PIPEB_FRMCOUNT_GM45 : PIPEA_FRMCOUNT_GM45;
if (!i915_pipe_enabled(dev, pipe)) {
DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
"pipe %d\n", pipe);
return 0;
}
return I915_READ(reg);
}
/*
* 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 drm_encoder *encoder;
if (mode_config->num_encoder) {
list_for_each_entry(encoder, &mode_config->encoder_list, head) {
struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder);
if (intel_encoder->hot_plug)
(*intel_encoder->hot_plug) (intel_encoder);
}
}
/* Just fire off a uevent and let userspace tell us what to do */
drm_sysfs_hotplug_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;
u16 rgvswctl;
u8 new_delay = dev_priv->cur_delay;
I915_WRITE(MEMINTRSTS, I915_READ(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;
}
DRM_DEBUG("rps change requested: %d -> %d\n",
dev_priv->cur_delay, new_delay);
rgvswctl = I915_READ(MEMSWCTL);
if (rgvswctl & MEMCTL_CMD_STS) {
DRM_ERROR("gpu busy, RCS change rejected\n");
return; /* still busy with another command */
}
/* Program the new state */
rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
(new_delay << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
I915_WRITE(MEMSWCTL, rgvswctl);
POSTING_READ(MEMSWCTL);
rgvswctl |= MEMCTL_CMD_STS;
I915_WRITE(MEMSWCTL, rgvswctl);
dev_priv->cur_delay = new_delay;
DRM_DEBUG("rps changed\n");
return;
}
irqreturn_t ironlake_irq_handler(struct drm_device *dev)
{
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;
struct drm_i915_master_private *master_priv;
/* disable master interrupt before clearing iir */
de_ier = I915_READ(DEIER);
I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
(void)I915_READ(DEIER);
de_iir = I915_READ(DEIIR);
gt_iir = I915_READ(GTIIR);
pch_iir = I915_READ(SDEIIR);
if (de_iir == 0 && gt_iir == 0 && pch_iir == 0)
goto done;
ret = IRQ_HANDLED;
if (dev->primary->master) {
master_priv = dev->primary->master->driver_priv;
if (master_priv->sarea_priv)
master_priv->sarea_priv->last_dispatch =
READ_BREADCRUMB(dev_priv);
}
if (gt_iir & GT_USER_INTERRUPT) {
u32 seqno = i915_get_gem_seqno(dev);
dev_priv->mm.irq_gem_seqno = seqno;
trace_i915_gem_request_complete(dev, seqno);
DRM_WAKEUP(&dev_priv->irq_queue);
dev_priv->hangcheck_count = 0;
mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
}
if (de_iir & DE_GSE)
ironlake_opregion_gse_intr(dev);
if (de_iir & DE_PLANEA_FLIP_DONE) {
intel_prepare_page_flip(dev, 0);
intel_finish_page_flip(dev, 0);
}
if (de_iir & DE_PLANEB_FLIP_DONE) {
intel_prepare_page_flip(dev, 1);
intel_finish_page_flip(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) &&
(pch_iir & SDE_HOTPLUG_MASK)) {
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
}
if (de_iir & DE_PCU_EVENT) {
I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS));
i915_handle_rps_change(dev);
}
/* should clear PCH hotplug event before clear CPU irq */
I915_WRITE(SDEIIR, pch_iir);
I915_WRITE(GTIIR, gt_iir);
I915_WRITE(DEIIR, de_iir);
done:
I915_WRITE(DEIER, de_ier);
(void)I915_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 };
DRM_DEBUG_DRIVER("generating error event\n");
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
if (atomic_read(&dev_priv->mm.wedged)) {
if (IS_I965G(dev)) {
DRM_DEBUG_DRIVER("resetting chip\n");
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_event);
if (!i965_reset(dev, GDRST_RENDER)) {
atomic_set(&dev_priv->mm.wedged, 0);
kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, reset_done_event);
}
} else {
DRM_DEBUG_DRIVER("reboot required\n");
}
}
}
static struct drm_i915_error_object *
i915_error_object_create(struct drm_device *dev,
struct drm_gem_object *src)
{
struct drm_i915_error_object *dst;
struct drm_i915_gem_object *src_priv;
int page, page_count;
if (src == NULL)
return NULL;
src_priv = to_intel_bo(src);
if (src_priv->pages == NULL)
return NULL;
page_count = src->size / PAGE_SIZE;
dst = kmalloc(sizeof(*dst) + page_count * sizeof (u32 *), GFP_ATOMIC);
if (dst == NULL)
return NULL;
for (page = 0; page < page_count; page++) {
void *s, *d = kmalloc(PAGE_SIZE, GFP_ATOMIC);
if (d == NULL)
goto unwind;
s = kmap_atomic(src_priv->pages[page], KM_USER0);
memcpy(d, s, PAGE_SIZE);
kunmap_atomic(s, KM_USER0);
dst->pages[page] = d;
}
dst->page_count = page_count;
dst->gtt_offset = src_priv->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);
}
static void
i915_error_state_free(struct drm_device *dev,
struct drm_i915_error_state *error)
{
i915_error_object_free(error->batchbuffer[0]);
i915_error_object_free(error->batchbuffer[1]);
i915_error_object_free(error->ringbuffer);
kfree(error->active_bo);
kfree(error);
}
static u32
i915_get_bbaddr(struct drm_device *dev, u32 *ring)
{
u32 cmd;
if (IS_I830(dev) || IS_845G(dev))
cmd = MI_BATCH_BUFFER;
else if (IS_I965G(dev))
cmd = (MI_BATCH_BUFFER_START | (2 << 6) |
MI_BATCH_NON_SECURE_I965);
else
cmd = (MI_BATCH_BUFFER_START | (2 << 6));
return ring[0] == cmd ? ring[1] : 0;
}
static u32
i915_ringbuffer_last_batch(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 head, bbaddr;
u32 *ring;
/* Locate the current position in the ringbuffer and walk back
* to find the most recently dispatched batch buffer.
*/
bbaddr = 0;
head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
ring = (u32 *)(dev_priv->ring.virtual_start + head);
while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
bbaddr = i915_get_bbaddr(dev, ring);
if (bbaddr)
break;
}
if (bbaddr == 0) {
ring = (u32 *)(dev_priv->ring.virtual_start + dev_priv->ring.Size);
while (--ring >= (u32 *)dev_priv->ring.virtual_start) {
bbaddr = i915_get_bbaddr(dev, ring);
if (bbaddr)
break;
}
}
return bbaddr;
}
/**
* 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_priv;
struct drm_i915_error_state *error;
struct drm_gem_object *batchbuffer[2];
unsigned long flags;
u32 bbaddr;
int count;
spin_lock_irqsave(&dev_priv->error_lock, flags);
error = dev_priv->first_error;
spin_unlock_irqrestore(&dev_priv->error_lock, flags);
if (error)
return;
error = kmalloc(sizeof(*error), GFP_ATOMIC);
if (!error) {
DRM_DEBUG_DRIVER("out of memory, not capturing error state\n");
return;
}
error->seqno = i915_get_gem_seqno(dev);
error->eir = I915_READ(EIR);
error->pgtbl_er = I915_READ(PGTBL_ER);
error->pipeastat = I915_READ(PIPEASTAT);
error->pipebstat = I915_READ(PIPEBSTAT);
error->instpm = I915_READ(INSTPM);
if (!IS_I965G(dev)) {
error->ipeir = I915_READ(IPEIR);
error->ipehr = I915_READ(IPEHR);
error->instdone = I915_READ(INSTDONE);
error->acthd = I915_READ(ACTHD);
error->bbaddr = 0;
} else {
error->ipeir = I915_READ(IPEIR_I965);
error->ipehr = I915_READ(IPEHR_I965);
error->instdone = I915_READ(INSTDONE_I965);
error->instps = I915_READ(INSTPS);
error->instdone1 = I915_READ(INSTDONE1);
error->acthd = I915_READ(ACTHD_I965);
error->bbaddr = I915_READ64(BB_ADDR);
}
bbaddr = i915_ringbuffer_last_batch(dev);
/* Grab the current batchbuffer, most likely to have crashed. */
batchbuffer[0] = NULL;
batchbuffer[1] = NULL;
count = 0;
list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
struct drm_gem_object *obj = obj_priv->obj;
if (batchbuffer[0] == NULL &&
bbaddr >= obj_priv->gtt_offset &&
bbaddr < obj_priv->gtt_offset + obj->size)
batchbuffer[0] = obj;
if (batchbuffer[1] == NULL &&
error->acthd >= obj_priv->gtt_offset &&
error->acthd < obj_priv->gtt_offset + obj->size &&
batchbuffer[0] != obj)
batchbuffer[1] = obj;
count++;
}
/* We need to copy these to an anonymous buffer as the simplest
* method to avoid being overwritten by userpace.
*/
error->batchbuffer[0] = i915_error_object_create(dev, batchbuffer[0]);
error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]);
/* Record the ringbuffer */
error->ringbuffer = i915_error_object_create(dev, dev_priv->ring.ring_obj);
/* Record buffers on the active list. */
error->active_bo = NULL;
error->active_bo_count = 0;
if (count)
error->active_bo = kmalloc(sizeof(*error->active_bo)*count,
GFP_ATOMIC);
if (error->active_bo) {
int i = 0;
list_for_each_entry(obj_priv, &dev_priv->mm.active_list, list) {
struct drm_gem_object *obj = obj_priv->obj;
error->active_bo[i].size = obj->size;
error->active_bo[i].name = obj->name;
error->active_bo[i].seqno = obj_priv->last_rendering_seqno;
error->active_bo[i].gtt_offset = obj_priv->gtt_offset;
error->active_bo[i].read_domains = obj->read_domains;
error->active_bo[i].write_domain = obj->write_domain;
error->active_bo[i].fence_reg = obj_priv->fence_reg;
error->active_bo[i].pinned = 0;
if (obj_priv->pin_count > 0)
error->active_bo[i].pinned = 1;
if (obj_priv->user_pin_count > 0)
error->active_bo[i].pinned = -1;
error->active_bo[i].tiling = obj_priv->tiling_mode;
error->active_bo[i].dirty = obj_priv->dirty;
error->active_bo[i].purgeable = obj_priv->madv != I915_MADV_WILLNEED;
if (++i == count)
break;
}
error->active_bo_count = i;
}
do_gettimeofday(&error->time);
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(dev, error);
}
void i915_destroy_error_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_error_state *error;
spin_lock(&dev_priv->error_lock);
error = dev_priv->first_error;
dev_priv->first_error = NULL;
spin_unlock(&dev_priv->error_lock);
if (error)
i915_error_state_free(dev, error);
}
/**
* 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.).
*/
static void i915_handle_error(struct drm_device *dev, bool wedged)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 eir = I915_READ(EIR);
u32 pipea_stats = I915_READ(PIPEASTAT);
u32 pipeb_stats = I915_READ(PIPEBSTAT);
i915_capture_error_state(dev);
printk(KERN_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);
printk(KERN_ERR " IPEIR: 0x%08x\n",
I915_READ(IPEIR_I965));
printk(KERN_ERR " IPEHR: 0x%08x\n",
I915_READ(IPEHR_I965));
printk(KERN_ERR " INSTDONE: 0x%08x\n",
I915_READ(INSTDONE_I965));
printk(KERN_ERR " INSTPS: 0x%08x\n",
I915_READ(INSTPS));
printk(KERN_ERR " INSTDONE1: 0x%08x\n",
I915_READ(INSTDONE1));
printk(KERN_ERR " ACTHD: 0x%08x\n",
I915_READ(ACTHD_I965));
I915_WRITE(IPEIR_I965, ipeir);
(void)I915_READ(IPEIR_I965);
}
if (eir & GM45_ERROR_PAGE_TABLE) {
u32 pgtbl_err = I915_READ(PGTBL_ER);
printk(KERN_ERR "page table error\n");
printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
pgtbl_err);
I915_WRITE(PGTBL_ER, pgtbl_err);
(void)I915_READ(PGTBL_ER);
}
}
if (IS_I9XX(dev)) {
if (eir & I915_ERROR_PAGE_TABLE) {
u32 pgtbl_err = I915_READ(PGTBL_ER);
printk(KERN_ERR "page table error\n");
printk(KERN_ERR " PGTBL_ER: 0x%08x\n",
pgtbl_err);
I915_WRITE(PGTBL_ER, pgtbl_err);
(void)I915_READ(PGTBL_ER);
}
}
if (eir & I915_ERROR_MEMORY_REFRESH) {
printk(KERN_ERR "memory refresh error\n");
printk(KERN_ERR "PIPEASTAT: 0x%08x\n",
pipea_stats);
printk(KERN_ERR "PIPEBSTAT: 0x%08x\n",
pipeb_stats);
/* pipestat has already been acked */
}
if (eir & I915_ERROR_INSTRUCTION) {
printk(KERN_ERR "instruction error\n");
printk(KERN_ERR " INSTPM: 0x%08x\n",
I915_READ(INSTPM));
if (!IS_I965G(dev)) {
u32 ipeir = I915_READ(IPEIR);
printk(KERN_ERR " IPEIR: 0x%08x\n",
I915_READ(IPEIR));
printk(KERN_ERR " IPEHR: 0x%08x\n",
I915_READ(IPEHR));
printk(KERN_ERR " INSTDONE: 0x%08x\n",
I915_READ(INSTDONE));
printk(KERN_ERR " ACTHD: 0x%08x\n",
I915_READ(ACTHD));
I915_WRITE(IPEIR, ipeir);
(void)I915_READ(IPEIR);
} else {
u32 ipeir = I915_READ(IPEIR_I965);
printk(KERN_ERR " IPEIR: 0x%08x\n",
I915_READ(IPEIR_I965));
printk(KERN_ERR " IPEHR: 0x%08x\n",
I915_READ(IPEHR_I965));
printk(KERN_ERR " INSTDONE: 0x%08x\n",
I915_READ(INSTDONE_I965));
printk(KERN_ERR " INSTPS: 0x%08x\n",
I915_READ(INSTPS));
printk(KERN_ERR " INSTDONE1: 0x%08x\n",
I915_READ(INSTDONE1));
printk(KERN_ERR " ACTHD: 0x%08x\n",
I915_READ(ACTHD_I965));
I915_WRITE(IPEIR_I965, ipeir);
(void)I915_READ(IPEIR_I965);
}
}
I915_WRITE(EIR, eir);
(void)I915_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);
}
if (wedged) {
atomic_set(&dev_priv->mm.wedged, 1);
/*
* Wakeup waiting processes so they don't hang
*/
DRM_WAKEUP(&dev_priv->irq_queue);
}
queue_work(dev_priv->wq, &dev_priv->error_work);
}
irqreturn_t i915_driver_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;
struct drm_i915_master_private *master_priv;
u32 iir, new_iir;
u32 pipea_stats, pipeb_stats;
u32 vblank_status;
u32 vblank_enable;
int vblank = 0;
unsigned long irqflags;
int irq_received;
int ret = IRQ_NONE;
atomic_inc(&dev_priv->irq_received);
if (HAS_PCH_SPLIT(dev))
return ironlake_irq_handler(dev);
iir = I915_READ(IIR);
if (IS_I965G(dev)) {
vblank_status = I915_START_VBLANK_INTERRUPT_STATUS;
vblank_enable = PIPE_START_VBLANK_INTERRUPT_ENABLE;
} else {
vblank_status = I915_VBLANK_INTERRUPT_STATUS;
vblank_enable = I915_VBLANK_INTERRUPT_ENABLE;
}
for (;;) {
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->user_irq_lock, irqflags);
pipea_stats = I915_READ(PIPEASTAT);
pipeb_stats = I915_READ(PIPEBSTAT);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
i915_handle_error(dev, false);
/*
* Clear the PIPE(A|B)STAT regs before the IIR
*/
if (pipea_stats & 0x8000ffff) {
if (pipea_stats & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe a underrun\n");
I915_WRITE(PIPEASTAT, pipea_stats);
irq_received = 1;
}
if (pipeb_stats & 0x8000ffff) {
if (pipeb_stats & PIPE_FIFO_UNDERRUN_STATUS)
DRM_DEBUG_DRIVER("pipe b underrun\n");
I915_WRITE(PIPEBSTAT, pipeb_stats);
irq_received = 1;
}
spin_unlock_irqrestore(&dev_priv->user_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 (dev->primary->master) {
master_priv = dev->primary->master->driver_priv;
if (master_priv->sarea_priv)
master_priv->sarea_priv->last_dispatch =
READ_BREADCRUMB(dev_priv);
}
if (iir & I915_USER_INTERRUPT) {
u32 seqno = i915_get_gem_seqno(dev);
dev_priv->mm.irq_gem_seqno = seqno;
trace_i915_gem_request_complete(dev, seqno);
DRM_WAKEUP(&dev_priv->irq_queue);
dev_priv->hangcheck_count = 0;
mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
}
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);
if (pipea_stats & vblank_status) {
vblank++;
drm_handle_vblank(dev, 0);
intel_finish_page_flip(dev, 0);
}
if (pipeb_stats & vblank_status) {
vblank++;
drm_handle_vblank(dev, 1);
intel_finish_page_flip(dev, 1);
}
if ((pipea_stats & I915_LEGACY_BLC_EVENT_STATUS) ||
(pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS) ||
(iir & I915_ASLE_INTERRUPT))
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;
}
return ret;
}
static int i915_emit_irq(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
RING_LOCALS;
i915_kernel_lost_context(dev);
DRM_DEBUG_DRIVER("\n");
dev_priv->counter++;
if (dev_priv->counter > 0x7FFFFFFFUL)
dev_priv->counter = 1;
if (master_priv->sarea_priv)
master_priv->sarea_priv->last_enqueue = dev_priv->counter;
BEGIN_LP_RING(4);
OUT_RING(MI_STORE_DWORD_INDEX);
OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
OUT_RING(dev_priv->counter);
OUT_RING(MI_USER_INTERRUPT);
ADVANCE_LP_RING();
return dev_priv->counter;
}
void i915_user_irq_get(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1)) {
if (HAS_PCH_SPLIT(dev))
ironlake_enable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
else
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
void i915_user_irq_put(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
BUG_ON(dev->irq_enabled && dev_priv->user_irq_refcount <= 0);
if (dev->irq_enabled && (--dev_priv->user_irq_refcount == 0)) {
if (HAS_PCH_SPLIT(dev))
ironlake_disable_graphics_irq(dev_priv, GT_USER_INTERRUPT);
else
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
}
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
void i915_trace_irq_get(struct drm_device *dev, u32 seqno)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
if (dev_priv->trace_irq_seqno == 0)
i915_user_irq_get(dev);
dev_priv->trace_irq_seqno = seqno;
}
static int i915_wait_irq(struct drm_device * dev, int irq_nr)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
int ret = 0;
DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr,
READ_BREADCRUMB(dev_priv));
if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
if (master_priv->sarea_priv)
master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
return 0;
}
if (master_priv->sarea_priv)
master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
i915_user_irq_get(dev);
DRM_WAIT_ON(ret, dev_priv->irq_queue, 3 * DRM_HZ,
READ_BREADCRUMB(dev_priv) >= irq_nr);
i915_user_irq_put(dev);
if (ret == -EBUSY) {
DRM_ERROR("EBUSY -- rec: %d emitted: %d\n",
READ_BREADCRUMB(dev_priv), (int)dev_priv->counter);
}
return ret;
}
/* Needs the lock as it touches the ring.
*/
int i915_irq_emit(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_irq_emit_t *emit = data;
int result;
if (!dev_priv || !dev_priv->ring.virtual_start) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
RING_LOCK_TEST_WITH_RETURN(dev, file_priv);
mutex_lock(&dev->struct_mutex);
result = i915_emit_irq(dev);
mutex_unlock(&dev->struct_mutex);
if (DRM_COPY_TO_USER(emit->irq_seq, &result, sizeof(int))) {
DRM_ERROR("copy_to_user\n");
return -EFAULT;
}
return 0;
}
/* Doesn't need the hardware lock.
*/
int i915_irq_wait(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_irq_wait_t *irqwait = data;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
return i915_wait_irq(dev, irqwait->irq_seq);
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
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;
int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
u32 pipeconf;
pipeconf = I915_READ(pipeconf_reg);
if (!(pipeconf & PIPEACONF_ENABLE))
return -EINVAL;
spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (HAS_PCH_SPLIT(dev))
ironlake_enable_display_irq(dev_priv, (pipe == 0) ?
DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
else if (IS_I965G(dev))
i915_enable_pipestat(dev_priv, pipe,
PIPE_START_VBLANK_INTERRUPT_ENABLE);
else
i915_enable_pipestat(dev_priv, pipe,
PIPE_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
return 0;
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
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->user_irq_lock, irqflags);
if (HAS_PCH_SPLIT(dev))
ironlake_disable_display_irq(dev_priv, (pipe == 0) ?
DE_PIPEA_VBLANK: DE_PIPEB_VBLANK);
else
i915_disable_pipestat(dev_priv, pipe,
PIPE_VBLANK_INTERRUPT_ENABLE |
PIPE_START_VBLANK_INTERRUPT_ENABLE);
spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
void i915_enable_interrupt (struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (!HAS_PCH_SPLIT(dev))
opregion_enable_asle(dev);
dev_priv->irq_enabled = 1;
}
/* Set the vblank monitor pipe
*/
int i915_vblank_pipe_set(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
return 0;
}
int i915_vblank_pipe_get(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_vblank_pipe_t *pipe = data;
if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
return 0;
}
/**
* Schedule buffer swap at given vertical blank.
*/
int i915_vblank_swap(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
/* The delayed swap mechanism was fundamentally racy, and has been
* removed. The model was that the client requested a delayed flip/swap
* from the kernel, then waited for vblank before continuing to perform
* rendering. The problem was that the kernel might wake the client
* up before it dispatched the vblank swap (since the lock has to be
* held while touching the ringbuffer), in which case the client would
* clear and start the next frame before the swap occurred, and
* flicker would occur in addition to likely missing the vblank.
*
* In the absence of this ioctl, userland falls back to a correct path
* of waiting for a vblank, then dispatching the swap on its own.
* Context switching to userland and back is plenty fast enough for
* meeting the requirements of vblank swapping.
*/
return -EINVAL;
}
struct drm_i915_gem_request *i915_get_tail_request(struct drm_device *dev) {
drm_i915_private_t *dev_priv = dev->dev_private;
return list_entry(dev_priv->mm.request_list.prev, struct drm_i915_gem_request, list);
}
/**
* 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;
/* No reset support on this chip yet. */
if (IS_GEN6(dev))
return;
if (!IS_I965G(dev))
acthd = I915_READ(ACTHD);
else
acthd = I915_READ(ACTHD_I965);
/* If all work is done then ACTHD clearly hasn't advanced. */
if (list_empty(&dev_priv->mm.request_list) ||
i915_seqno_passed(i915_get_gem_seqno(dev), i915_get_tail_request(dev)->seqno)) {
dev_priv->hangcheck_count = 0;
return;
}
if (dev_priv->last_acthd == acthd && dev_priv->hangcheck_count > 0) {
DRM_ERROR("Hangcheck timer elapsed... GPU hung\n");
i915_handle_error(dev, true);
return;
}
/* Reset timer case chip hangs without another request being added */
mod_timer(&dev_priv->hangcheck_timer, jiffies + DRM_I915_HANGCHECK_PERIOD);
if (acthd != dev_priv->last_acthd)
dev_priv->hangcheck_count = 0;
else
dev_priv->hangcheck_count++;
dev_priv->last_acthd = acthd;
}
/* 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;
I915_WRITE(HWSTAM, 0xeffe);
/* XXX hotplug from PCH */
I915_WRITE(DEIMR, 0xffffffff);
I915_WRITE(DEIER, 0x0);
(void) I915_READ(DEIER);
/* and GT */
I915_WRITE(GTIMR, 0xffffffff);
I915_WRITE(GTIER, 0x0);
(void) I915_READ(GTIER);
/* south display irq */
I915_WRITE(SDEIMR, 0xffffffff);
I915_WRITE(SDEIER, 0x0);
(void) I915_READ(SDEIER);
}
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_mask = GT_USER_INTERRUPT;
u32 hotplug_mask = SDE_CRT_HOTPLUG | SDE_PORTB_HOTPLUG |
SDE_PORTC_HOTPLUG | SDE_PORTD_HOTPLUG;
dev_priv->irq_mask_reg = ~display_mask;
dev_priv->de_irq_enable_reg = display_mask | DE_PIPEA_VBLANK | DE_PIPEB_VBLANK;
/* should always can generate irq */
I915_WRITE(DEIIR, I915_READ(DEIIR));
I915_WRITE(DEIMR, dev_priv->irq_mask_reg);
I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
(void) I915_READ(DEIER);
/* user interrupt should be enabled, but masked initial */
dev_priv->gt_irq_mask_reg = 0xffffffff;
dev_priv->gt_irq_enable_reg = render_mask;
I915_WRITE(GTIIR, I915_READ(GTIIR));
I915_WRITE(GTIMR, dev_priv->gt_irq_mask_reg);
I915_WRITE(GTIER, dev_priv->gt_irq_enable_reg);
(void) I915_READ(GTIER);
dev_priv->pch_irq_mask_reg = ~hotplug_mask;
dev_priv->pch_irq_enable_reg = hotplug_mask;
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
I915_WRITE(SDEIMR, dev_priv->pch_irq_mask_reg);
I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg);
(void) I915_READ(SDEIER);
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;
}
void i915_driver_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);
INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
INIT_WORK(&dev_priv->error_work, i915_error_work_func);
if (HAS_PCH_SPLIT(dev)) {
ironlake_irq_preinstall(dev);
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, 0xeffe);
I915_WRITE(PIPEASTAT, 0);
I915_WRITE(PIPEBSTAT, 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
(void) I915_READ(IER);
}
/*
* Must be called after intel_modeset_init or hotplug interrupts won't be
* enabled correctly.
*/
int i915_driver_irq_postinstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
u32 enable_mask = I915_INTERRUPT_ENABLE_FIX | I915_INTERRUPT_ENABLE_VAR;
u32 error_mask;
DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B;
if (HAS_PCH_SPLIT(dev))
return ironlake_irq_postinstall(dev);
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask_reg = ~I915_INTERRUPT_ENABLE_FIX;
dev_priv->pipestat[0] = 0;
dev_priv->pipestat[1] = 0;
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;
/* Ignore TV since it's buggy */
I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
/* Enable in IER... */
enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
/* and unmask in IMR */
i915_enable_irq(dev_priv, 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);
/* Disable pipe interrupt enables, clear pending pipe status */
I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
/* Clear pending interrupt status */
I915_WRITE(IIR, I915_READ(IIR));
I915_WRITE(IER, enable_mask);
I915_WRITE(IMR, dev_priv->irq_mask_reg);
(void) I915_READ(IER);
opregion_enable_asle(dev);
return 0;
}
static void ironlake_irq_uninstall(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
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));
}
void i915_driver_irq_uninstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
if (!dev_priv)
return;
dev_priv->vblank_pipe = 0;
if (HAS_PCH_SPLIT(dev)) {
ironlake_irq_uninstall(dev);
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);
I915_WRITE(PIPEASTAT, 0);
I915_WRITE(PIPEBSTAT, 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
I915_WRITE(PIPEASTAT, I915_READ(PIPEASTAT) & 0x8000ffff);
I915_WRITE(PIPEBSTAT, I915_READ(PIPEBSTAT) & 0x8000ffff);
I915_WRITE(IIR, I915_READ(IIR));
}
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