On Wed, 27 Sep 2017 11:30:33 +0200, Sagar Arun Kamble
<sagar.a.kamble@xxxxxxxxx> wrote:
Prepared generic helpers intel_uc_suspend, intel_uc_resume,
intel_uc_runtime_suspend, intel_uc_runtime_resume. These are
called from respective GEM functions.
Only exception is intel_uc_resume that needs to be called
w/ or w/o GuC loaded in i915_drm_resume path. Changes to
add WOPCM condition check to load GuC during resume will be added
in later patches.
v2: Rebase w.r.t removal of GuC code restructuring.
v3: Calling intel_uc_resume from i915_gem_resume post resuming
i915 gem setup. This is symmetrical with i915_gem_suspend.
Removed error messages from i915 suspend/resume routines as
uC suspend/resume routines will have those. (Michal Wajdeczko)
Declare wedged on uc_suspend failure and uc_resume failure.
(Michał Winiarski)
Keeping the uC suspend/resume function definitions close to other
uC functions.
v4: Added implementation to intel_uc_resume as GuC resume is
needed to be triggered post reloading the firmware as well. Added
comments about semantics of GuC resume with the firmware reload.
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Michał Winiarski <michal.winiarski@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 10 ++++++++++
drivers/gpu/drm/i915/i915_gem.c | 36
++++++++++++++++++++++++++++--------
drivers/gpu/drm/i915/intel_uc.c | 20 ++++++++++++++++++++
drivers/gpu/drm/i915/intel_uc.h | 4 ++++
4 files changed, 62 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c
b/drivers/gpu/drm/i915/i915_drv.c
index 174a7c5..f79646b 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1698,6 +1698,16 @@ static int i915_drm_resume(struct drm_device *dev)
}
mutex_unlock(&dev->struct_mutex);
+ /*
+ * NB: Currently we know that at the end of suspend we have done Full
+ * GPU reset, Hence GuC is loaded again during i915_gem_init_hw.
+ * Now, send action to GuC to resume back again as earlier call to
+ * intel_uc_resume from i915_gem_resume would have done nothing.
+ */
+ ret = intel_uc_resume(dev_priv);
+ if (ret)
+ i915_gem_set_wedged(dev_priv);
+
intel_modeset_init_hw(dev);
spin_lock_irq(&dev_priv->irq_lock);
diff --git a/drivers/gpu/drm/i915/i915_gem.c
b/drivers/gpu/drm/i915/i915_gem.c
index 11922af..c54c9b4 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2025,9 +2025,11 @@ int i915_gem_fault(struct vm_fault *vmf)
int i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
{
struct drm_i915_gem_object *obj, *on;
- int i;
+ int i, ret;
- intel_guc_suspend(dev_priv);
+ ret = intel_uc_runtime_suspend(dev_priv);
+ if (ret)
+ return ret;
/*
* Only called during RPM suspend. All users of the userfault_list
@@ -2068,7 +2070,7 @@ int i915_gem_runtime_suspend(struct
drm_i915_private *dev_priv)
reg->dirty = true;
}
- return 0;
+ return ret;
Hmm, at this point we know that we didn't fail, so return 0 was fine.
}
void i915_gem_runtime_resume(struct drm_i915_private *dev_priv)
@@ -2080,7 +2082,7 @@ void i915_gem_runtime_resume(struct
drm_i915_private *dev_priv)
i915_gem_init_swizzling(dev_priv);
i915_gem_restore_fences(dev_priv);
- intel_guc_resume(dev_priv);
+ intel_uc_runtime_resume(dev_priv);
}
static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object
*obj)
@@ -4571,7 +4573,9 @@ int i915_gem_suspend(struct drm_i915_private
*dev_priv)
if (WARN_ON(!intel_engines_are_idle(dev_priv)))
i915_gem_set_wedged(dev_priv); /* no hope, discard everything */
- intel_guc_suspend(dev_priv);
+ ret = intel_uc_suspend(dev_priv);
+ if (ret)
+ i915_gem_set_wedged(dev_priv); /* no hope, discard everything */
/*
* Neither the BIOS, ourselves or any other kernel
@@ -4606,6 +4610,7 @@ int i915_gem_suspend(struct drm_i915_private
*dev_priv)
int i915_gem_resume(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
+ int ret;
WARN_ON(dev_priv->gt.awake);
@@ -4618,10 +4623,20 @@ int i915_gem_resume(struct drm_i915_private
*dev_priv)
* it and start again.
*/
dev_priv->gt.resume(dev_priv);
- intel_guc_resume(dev_priv);
+
+ /*
+ * NB: At the end of suspend, Full GPU reset is being done which
+ * wipes/unloads the GuC firmware. If reset is avoided there, we can
+ * check the WOPCM status here to see if GuC is still loaded and just
+ * do GuC resume without reloading the firmware back.
+ */
+ ret = intel_uc_resume(dev_priv);
+ if (ret)
+ i915_gem_set_wedged(dev_priv);
+
mutex_unlock(&dev->struct_mutex);
- return 0;
+ return ret;
}
void i915_gem_init_swizzling(struct drm_i915_private *dev_priv)
@@ -4741,7 +4756,12 @@ int i915_gem_init_hw(struct drm_i915_private
*dev_priv)
intel_mocs_init_l3cc_table(dev_priv);
- /* We can't enable contexts until all firmware is loaded */
+ /*
+ * We can't enable contexts until all firmware is loaded.
+ * FIXME: GuC is loaded unconditionally currently without checking
+ * if it is already available in WOPCM. We can skip that load based
+ * on WOPCM status.
hmm, maybe this comment should be in intel_uc_init_hw ?
+ */
ret = intel_uc_init_hw(dev_priv);
if (ret)
goto out;
diff --git a/drivers/gpu/drm/i915/intel_uc.c
b/drivers/gpu/drm/i915/intel_uc.c
index 2774778..7b30790 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -481,6 +481,26 @@ void intel_uc_fini_hw(struct drm_i915_private
*dev_priv)
i915_ggtt_disable_guc(dev_priv);
}
+int intel_uc_runtime_suspend(struct drm_i915_private *dev_priv)
+{
+ return intel_guc_suspend(dev_priv);
+}
+
+int intel_uc_runtime_resume(struct drm_i915_private *dev_priv)
+{
+ return intel_guc_resume(dev_priv);
+}
+
+int intel_uc_suspend(struct drm_i915_private *dev_priv)
+{
+ return intel_guc_suspend(dev_priv);
+}
+
+int intel_uc_resume(struct drm_i915_private *dev_priv)
+{
+ return intel_guc_resume(dev_priv);
+}
+
int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32
len)
{
WARN(1, "Unexpected send: action=%#x\n", *action);
diff --git a/drivers/gpu/drm/i915/intel_uc.h
b/drivers/gpu/drm/i915/intel_uc.h
index 6966349..0a79e17 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -208,6 +208,10 @@ struct intel_huc {
void intel_uc_fini_fw(struct drm_i915_private *dev_priv);
int intel_uc_init_hw(struct drm_i915_private *dev_priv);
void intel_uc_fini_hw(struct drm_i915_private *dev_priv);
+int intel_uc_runtime_suspend(struct drm_i915_private *dev_priv);
+int intel_uc_runtime_resume(struct drm_i915_private *dev_priv);
+int intel_uc_suspend(struct drm_i915_private *dev_priv);
+int intel_uc_resume(struct drm_i915_private *dev_priv);
int intel_guc_sample_forcewake(struct intel_guc *guc);
int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32
len);
int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32
len);
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
