This extra bit of interrupt enabling code doesn't belong in the wait
seqno function. If anything we should pull it out to a helper so the
throttle code can also use it. The history is a bit vague, but I am
going to attempt to just dump it, unless someone can argue otherwise.
Removing this allows for a shared lock free wait seqno function. To keep
tabs on this issue though, the IER value is stored on error capture
(recommended by Chris Wilson)
v2: fixed typo EIR->IER (Ben)
Fix some white space (Ben)
Move IER capture to globally instead of per ring (Ben)
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/gpu/drm/i915/i915_debugfs.c | 1 +
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem.c | 14 --------------
drivers/gpu/drm/i915/i915_irq.c | 8 ++++++++
4 files changed, 10 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 120db46..8ed0342 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -712,6 +712,7 @@ static int i915_error_state(struct seq_file *m, void *unused)
error->time.tv_usec);
seq_printf(m, "PCI ID: 0x%04x\n", dev->pci_device);
seq_printf(m, "EIR: 0x%08x\n", error->eir);
+ seq_printf(m, "IER: 0x%08x\n", error->ier);
seq_printf(m, "PGTBL_ER: 0x%08x\n", error->pgtbl_er);
for (i = 0; i < dev_priv->num_fence_regs; i++)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 34d7041..d0eeb28 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -173,6 +173,7 @@ struct intel_display_error_state;
struct drm_i915_error_state {
u32 eir;
u32 pgtbl_er;
+ u32 ier;
u32 pipestat[I915_MAX_PIPES];
u32 tail[I915_NUM_RINGS];
u32 head[I915_NUM_RINGS];
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3b731ef..5938b9b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1828,7 +1828,6 @@ i915_wait_request(struct intel_ring_buffer *ring,
uint32_t seqno)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
- u32 ier;
int ret = 0;
BUG_ON(seqno == 0);
@@ -1863,19 +1862,6 @@ i915_wait_request(struct intel_ring_buffer *ring,
}
if (!i915_seqno_passed(ring->get_seqno(ring), seqno)) {
- if (HAS_PCH_SPLIT(ring->dev))
- ier = I915_READ(DEIER) | I915_READ(GTIER);
- else if (IS_VALLEYVIEW(ring->dev))
- ier = I915_READ(GTIER) | I915_READ(VLV_IER);
- else
- ier = I915_READ(IER);
- if (!ier) {
- DRM_ERROR("something (likely vbetool) disabled "
- "interrupts, re-enabling\n");
- ring->dev->driver->irq_preinstall(ring->dev);
- ring->dev->driver->irq_postinstall(ring->dev);
- }
-
trace_i915_gem_request_wait_begin(ring, seqno);
ring->waiting_seqno = seqno;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 0211263..5e9d05d 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1155,6 +1155,14 @@ static void i915_capture_error_state(struct drm_device *dev)
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
+ error->ier = I915_READ(IER);
+
for_each_pipe(pipe)
error->pipestat[pipe] = I915_READ(PIPESTAT(pipe));
--
1.7.10
