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path: root/drivers/gpu/drm/i915/i915_irq.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
-rw-r--r--drivers/gpu/drm/i915/i915_irq.c277
1 files changed, 148 insertions, 129 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index baae511c785b..26f48932a51e 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -60,43 +60,6 @@ i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
}
/**
- * i915_get_pipe - return the the pipe associated with a given plane
- * @dev: DRM device
- * @plane: plane to look for
- *
- * The Intel Mesa & 2D drivers call the vblank routines with a plane number
- * rather than a pipe number, since they may not always be equal. This routine
- * maps the given @plane back to a pipe number.
- */
-static int
-i915_get_pipe(struct drm_device *dev, int plane)
-{
- drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
- u32 dspcntr;
-
- dspcntr = plane ? I915_READ(DSPBCNTR) : I915_READ(DSPACNTR);
-
- return dspcntr & DISPPLANE_SEL_PIPE_MASK ? 1 : 0;
-}
-
-/**
- * i915_get_plane - return the the plane associated with a given pipe
- * @dev: DRM device
- * @pipe: pipe to look for
- *
- * The Intel Mesa & 2D drivers call the vblank routines with a plane number
- * rather than a plane number, since they may not always be equal. This routine
- * maps the given @pipe back to a plane number.
- */
-static int
-i915_get_plane(struct drm_device *dev, int pipe)
-{
- if (i915_get_pipe(dev, 0) == pipe)
- return 0;
- return 1;
-}
-
-/**
* i915_pipe_enabled - check if a pipe is enabled
* @dev: DRM device
* @pipe: pipe to check
@@ -121,6 +84,9 @@ i915_pipe_enabled(struct drm_device *dev, int pipe)
* Emit blits for scheduled buffer swaps.
*
* This function will be called with the HW lock held.
+ * Because this function must grab the ring mutex (dev->struct_mutex),
+ * it can no longer run at soft irq time. We'll fix this when we do
+ * the DRI2 swap buffer work.
*/
static void i915_vblank_tasklet(struct drm_device *dev)
{
@@ -141,6 +107,8 @@ static void i915_vblank_tasklet(struct drm_device *dev)
u32 ropcpp = (0xcc << 16) | ((cpp - 1) << 24);
RING_LOCALS;
+ mutex_lock(&dev->struct_mutex);
+
if (IS_I965G(dev) && sarea_priv->front_tiled) {
cmd |= XY_SRC_COPY_BLT_DST_TILED;
dst_pitch >>= 2;
@@ -165,7 +133,7 @@ static void i915_vblank_tasklet(struct drm_device *dev)
list_for_each_safe(list, tmp, &dev_priv->vbl_swaps.head) {
drm_i915_vbl_swap_t *vbl_swap =
list_entry(list, drm_i915_vbl_swap_t, head);
- int pipe = i915_get_pipe(dev, vbl_swap->plane);
+ int pipe = vbl_swap->pipe;
if ((counter[pipe] - vbl_swap->sequence) > (1<<23))
continue;
@@ -179,20 +147,19 @@ static void i915_vblank_tasklet(struct drm_device *dev)
drw = drm_get_drawable_info(dev, vbl_swap->drw_id);
- if (!drw) {
- spin_unlock(&dev->drw_lock);
- drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
- spin_lock(&dev_priv->swaps_lock);
- continue;
- }
-
list_for_each(hit, &hits) {
drm_i915_vbl_swap_t *swap_cmp =
list_entry(hit, drm_i915_vbl_swap_t, head);
struct drm_drawable_info *drw_cmp =
drm_get_drawable_info(dev, swap_cmp->drw_id);
- if (drw_cmp &&
+ /* Make sure both drawables are still
+ * around and have some rectangles before
+ * we look inside to order them for the
+ * blts below.
+ */
+ if (drw_cmp && drw_cmp->num_rects > 0 &&
+ drw && drw->num_rects > 0 &&
drw_cmp->rects[0].y1 > drw->rects[0].y1) {
list_add_tail(list, hit);
break;
@@ -212,6 +179,7 @@ static void i915_vblank_tasklet(struct drm_device *dev)
if (nhits == 0) {
spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ mutex_unlock(&dev->struct_mutex);
return;
}
@@ -265,18 +233,21 @@ static void i915_vblank_tasklet(struct drm_device *dev)
drm_i915_vbl_swap_t *swap_hit =
list_entry(hit, drm_i915_vbl_swap_t, head);
struct drm_clip_rect *rect;
- int num_rects, plane;
+ int num_rects, pipe;
unsigned short top, bottom;
drw = drm_get_drawable_info(dev, swap_hit->drw_id);
+ /* The drawable may have been destroyed since
+ * the vblank swap was queued
+ */
if (!drw)
continue;
rect = drw->rects;
- plane = swap_hit->plane;
- top = upper[plane];
- bottom = lower[plane];
+ pipe = swap_hit->pipe;
+ top = upper[pipe];
+ bottom = lower[pipe];
for (num_rects = drw->num_rects; num_rects--; rect++) {
int y1 = max(rect->y1, top);
@@ -302,6 +273,7 @@ static void i915_vblank_tasklet(struct drm_device *dev)
}
spin_unlock_irqrestore(&dev->drw_lock, irqflags);
+ mutex_unlock(&dev->struct_mutex);
list_for_each_safe(hit, tmp, &hits) {
drm_i915_vbl_swap_t *swap_hit =
@@ -313,15 +285,16 @@ static void i915_vblank_tasklet(struct drm_device *dev)
}
}
-u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
+/* 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;
- int pipe;
- pipe = i915_get_pipe(dev, plane);
high_frame = pipe ? PIPEBFRAMEHIGH : PIPEAFRAMEHIGH;
low_frame = pipe ? PIPEBFRAMEPIXEL : PIPEAFRAMEPIXEL;
@@ -350,18 +323,37 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
}
void
-i915_gem_vblank_work_handler(struct work_struct *work)
+i915_vblank_work_handler(struct work_struct *work)
{
- drm_i915_private_t *dev_priv;
- struct drm_device *dev;
+ drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
+ vblank_work);
+ struct drm_device *dev = dev_priv->dev;
+ unsigned long irqflags;
- dev_priv = container_of(work, drm_i915_private_t,
- mm.vblank_work);
- dev = dev_priv->dev;
+ if (dev->lock.hw_lock == NULL) {
+ i915_vblank_tasklet(dev);
+ return;
+ }
+
+ spin_lock_irqsave(&dev->tasklet_lock, irqflags);
+ dev->locked_tasklet_func = i915_vblank_tasklet;
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+
+ /* Try to get the lock now, if this fails, the lock
+ * holder will execute the tasklet during unlock
+ */
+ if (!drm_lock_take(&dev->lock, DRM_KERNEL_CONTEXT))
+ return;
+
+ dev->lock.lock_time = jiffies;
+ atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
+
+ spin_lock_irqsave(&dev->tasklet_lock, irqflags);
+ dev->locked_tasklet_func = NULL;
+ spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
- mutex_lock(&dev->struct_mutex);
i915_vblank_tasklet(dev);
- mutex_unlock(&dev->struct_mutex);
+ drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT);
}
irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
@@ -398,7 +390,7 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
else if (pipea_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS)) {
vblank++;
- drm_handle_vblank(dev, i915_get_plane(dev, 0));
+ drm_handle_vblank(dev, 0);
}
I915_WRITE(PIPEASTAT, pipea_stats);
@@ -416,7 +408,7 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
else if (pipeb_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS)) {
vblank++;
- drm_handle_vblank(dev, i915_get_plane(dev, 1));
+ drm_handle_vblank(dev, 1);
}
if (pipeb_stats & I915_LEGACY_BLC_EVENT_STATUS)
@@ -441,12 +433,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
if (iir & I915_ASLE_INTERRUPT)
opregion_asle_intr(dev);
- if (vblank && dev_priv->swaps_pending > 0) {
- if (dev_priv->ring.ring_obj == NULL)
- drm_locked_tasklet(dev, i915_vblank_tasklet);
- else
- schedule_work(&dev_priv->mm.vblank_work);
- }
+ if (vblank && dev_priv->swaps_pending > 0)
+ schedule_work(&dev_priv->vblank_work);
return IRQ_HANDLED;
}
@@ -481,22 +469,24 @@ static int i915_emit_irq(struct drm_device * dev)
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(&dev_priv->user_irq_lock);
+ spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
if (dev->irq_enabled && (++dev_priv->user_irq_refcount == 1))
i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
- spin_unlock(&dev_priv->user_irq_lock);
+ 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(&dev_priv->user_irq_lock);
+ 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))
i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
- spin_unlock(&dev_priv->user_irq_lock);
+ spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
static int i915_wait_irq(struct drm_device * dev, int irq_nr)
@@ -578,74 +568,95 @@ int i915_irq_wait(struct drm_device *dev, void *data,
return i915_wait_irq(dev, irqwait->irq_seq);
}
-int i915_enable_vblank(struct drm_device *dev, int plane)
+/* 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;
- int pipe = i915_get_pipe(dev, plane);
u32 pipestat_reg = 0;
u32 pipestat;
+ u32 interrupt = 0;
+ unsigned long irqflags;
switch (pipe) {
case 0:
pipestat_reg = PIPEASTAT;
- i915_enable_irq(dev_priv, I915_DISPLAY_PIPE_A_EVENT_INTERRUPT);
+ interrupt = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
break;
case 1:
pipestat_reg = PIPEBSTAT;
- i915_enable_irq(dev_priv, I915_DISPLAY_PIPE_B_EVENT_INTERRUPT);
+ interrupt = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
break;
default:
DRM_ERROR("tried to enable vblank on non-existent pipe %d\n",
pipe);
- break;
+ return 0;
}
- if (pipestat_reg) {
- pipestat = I915_READ(pipestat_reg);
- if (IS_I965G(dev))
- pipestat |= PIPE_START_VBLANK_INTERRUPT_ENABLE;
- else
- pipestat |= PIPE_VBLANK_INTERRUPT_ENABLE;
- /* Clear any stale interrupt status */
- pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS |
- PIPE_VBLANK_INTERRUPT_STATUS);
- I915_WRITE(pipestat_reg, pipestat);
- }
+ spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
+ /* Enabling vblank events in IMR comes before PIPESTAT write, or
+ * there's a race where the PIPESTAT vblank bit gets set to 1, so
+ * the OR of enabled PIPESTAT bits goes to 1, so the PIPExEVENT in
+ * ISR flashes to 1, but the IIR bit doesn't get set to 1 because
+ * IMR masks it. It doesn't ever get set after we clear the masking
+ * in IMR because the ISR bit is edge, not level-triggered, on the
+ * OR of PIPESTAT bits.
+ */
+ i915_enable_irq(dev_priv, interrupt);
+ pipestat = I915_READ(pipestat_reg);
+ if (IS_I965G(dev))
+ pipestat |= PIPE_START_VBLANK_INTERRUPT_ENABLE;
+ else
+ pipestat |= PIPE_VBLANK_INTERRUPT_ENABLE;
+ /* Clear any stale interrupt status */
+ pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS |
+ PIPE_VBLANK_INTERRUPT_STATUS);
+ I915_WRITE(pipestat_reg, pipestat);
+ (void) I915_READ(pipestat_reg); /* Posting read */
+ spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
return 0;
}
-void i915_disable_vblank(struct drm_device *dev, int plane)
+/* 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;
- int pipe = i915_get_pipe(dev, plane);
u32 pipestat_reg = 0;
u32 pipestat;
+ u32 interrupt = 0;
+ unsigned long irqflags;
switch (pipe) {
case 0:
pipestat_reg = PIPEASTAT;
- i915_disable_irq(dev_priv, I915_DISPLAY_PIPE_A_EVENT_INTERRUPT);
+ interrupt = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
break;
case 1:
pipestat_reg = PIPEBSTAT;
- i915_disable_irq(dev_priv, I915_DISPLAY_PIPE_B_EVENT_INTERRUPT);
+ interrupt = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
break;
default:
DRM_ERROR("tried to disable vblank on non-existent pipe %d\n",
pipe);
+ return;
break;
}
- if (pipestat_reg) {
- pipestat = I915_READ(pipestat_reg);
- pipestat &= ~(PIPE_START_VBLANK_INTERRUPT_ENABLE |
- PIPE_VBLANK_INTERRUPT_ENABLE);
- /* Clear any stale interrupt status */
- pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS |
- PIPE_VBLANK_INTERRUPT_STATUS);
- I915_WRITE(pipestat_reg, pipestat);
- }
+ spin_lock_irqsave(&dev_priv->user_irq_lock, irqflags);
+ i915_disable_irq(dev_priv, interrupt);
+ pipestat = I915_READ(pipestat_reg);
+ pipestat &= ~(PIPE_START_VBLANK_INTERRUPT_ENABLE |
+ PIPE_VBLANK_INTERRUPT_ENABLE);
+ /* Clear any stale interrupt status */
+ pipestat |= (PIPE_START_VBLANK_INTERRUPT_STATUS |
+ PIPE_VBLANK_INTERRUPT_STATUS);
+ I915_WRITE(pipestat_reg, pipestat);
+ (void) I915_READ(pipestat_reg); /* Posting read */
+ spin_unlock_irqrestore(&dev_priv->user_irq_lock, irqflags);
}
/* Set the vblank monitor pipe
@@ -687,8 +698,8 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_vblank_swap_t *swap = data;
- drm_i915_vbl_swap_t *vbl_swap;
- unsigned int pipe, seqtype, curseq, plane;
+ drm_i915_vbl_swap_t *vbl_swap, *vbl_old;
+ unsigned int pipe, seqtype, curseq;
unsigned long irqflags;
struct list_head *list;
int ret;
@@ -709,8 +720,7 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
return -EINVAL;
}
- plane = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
- pipe = i915_get_pipe(dev, plane);
+ pipe = (swap->seqtype & _DRM_VBLANK_SECONDARY) ? 1 : 0;
seqtype = swap->seqtype & (_DRM_VBLANK_RELATIVE | _DRM_VBLANK_ABSOLUTE);
@@ -751,44 +761,52 @@ int i915_vblank_swap(struct drm_device *dev, void *data,
}
}
+ vbl_swap = drm_calloc(1, sizeof(*vbl_swap), DRM_MEM_DRIVER);
+
+ if (!vbl_swap) {
+ DRM_ERROR("Failed to allocate memory to queue swap\n");
+ drm_vblank_put(dev, pipe);
+ return -ENOMEM;
+ }
+
+ vbl_swap->drw_id = swap->drawable;
+ vbl_swap->pipe = pipe;
+ vbl_swap->sequence = swap->sequence;
+
spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
list_for_each(list, &dev_priv->vbl_swaps.head) {
- vbl_swap = list_entry(list, drm_i915_vbl_swap_t, head);
+ vbl_old = list_entry(list, drm_i915_vbl_swap_t, head);
- if (vbl_swap->drw_id == swap->drawable &&
- vbl_swap->plane == plane &&
- vbl_swap->sequence == swap->sequence) {
+ if (vbl_old->drw_id == swap->drawable &&
+ vbl_old->pipe == pipe &&
+ vbl_old->sequence == swap->sequence) {
spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
+ drm_vblank_put(dev, pipe);
+ drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
DRM_DEBUG("Already scheduled\n");
return 0;
}
}
- spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
-
- if (dev_priv->swaps_pending >= 100) {
+ if (dev_priv->swaps_pending >= 10) {
DRM_DEBUG("Too many swaps queued\n");
+ DRM_DEBUG(" pipe 0: %d pipe 1: %d\n",
+ drm_vblank_count(dev, 0),
+ drm_vblank_count(dev, 1));
+
+ list_for_each(list, &dev_priv->vbl_swaps.head) {
+ vbl_old = list_entry(list, drm_i915_vbl_swap_t, head);
+ DRM_DEBUG("\tdrw %x pipe %d seq %x\n",
+ vbl_old->drw_id, vbl_old->pipe,
+ vbl_old->sequence);
+ }
+ spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
drm_vblank_put(dev, pipe);
+ drm_free(vbl_swap, sizeof(*vbl_swap), DRM_MEM_DRIVER);
return -EBUSY;
}
- vbl_swap = drm_calloc(1, sizeof(*vbl_swap), DRM_MEM_DRIVER);
-
- if (!vbl_swap) {
- DRM_ERROR("Failed to allocate memory to queue swap\n");
- drm_vblank_put(dev, pipe);
- return -ENOMEM;
- }
-
- DRM_DEBUG("\n");
-
- vbl_swap->drw_id = swap->drawable;
- vbl_swap->plane = plane;
- vbl_swap->sequence = swap->sequence;
-
- spin_lock_irqsave(&dev_priv->swaps_lock, irqflags);
-
list_add_tail(&vbl_swap->head, &dev_priv->vbl_swaps.head);
dev_priv->swaps_pending++;
@@ -815,6 +833,7 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
spin_lock_init(&dev_priv->swaps_lock);
INIT_LIST_HEAD(&dev_priv->vbl_swaps.head);
+ INIT_WORK(&dev_priv->vblank_work, i915_vblank_work_handler);
dev_priv->swaps_pending = 0;
/* Set initial unmasked IRQs to just the selected vblank pipes. */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 04:51:32 +0100