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drm/radeon: add a reset work handler

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New asics support non-privileged IBs.  This allows us
to skip IB checking in the driver since the hardware
will check the command buffers for us.  When using
non-privileged IBs, if the CP encounters an illegal
register in the command stream, it will halt and generate
an interrupt.  The CP needs to be reset to continue.  For now
just do a full GPU reset when this happens.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2013-06-14 09:13:52 -04:00
parent 8010179067
commit 8f61b34ceb
2 changed files with 19 additions and 0 deletions
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18
drivers/gpu/drm/radeon/radeon_irq_kms.c
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@@ -81,6 +81,23 @@ static void radeon_hotplug_work_func(struct work_struct *work)
drm_helper_hpd_irq_event(dev);
}
/**
* radeon_irq_reset_work_func - execute gpu reset
*
* @work: work struct
*
* Execute scheduled gpu reset (cayman+).
* This function is called when the irq handler
* thinks we need a gpu reset.
*/
static void radeon_irq_reset_work_func(struct work_struct *work)
{
struct radeon_device *rdev = container_of(work, struct radeon_device,
reset_work);
radeon_gpu_reset(rdev);
}
/**
* radeon_driver_irq_preinstall_kms - drm irq preinstall callback
*
@@ -243,6 +260,7 @@ int radeon_irq_kms_init(struct radeon_device *rdev)
INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func);
spin_lock_init(&rdev->irq.lock);
r = drm_vblank_init(rdev->ddev, rdev->num_crtc);