[PATCH] drm/radeon/kms: implement gpu lockup check for evergreen

[Alex Deucher <alexdeucher@gmail.com>]

Now that soft reset works, we can add this.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
---
 drivers/gpu/drm/radeon/evergreen.c |   26 ++++++++++++++++++++++++--
 drivers/gpu/drm/radeon/radeon.h    |    1 +
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 3c580b3..01d292c 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2169,8 +2169,30 @@ int evergreen_mc_init(struct radeon_device *rdev)
 
 bool evergreen_gpu_is_lockup(struct radeon_device *rdev)
 {
-	/* FIXME: implement for evergreen */
-	return false;
+	u32 srbm_status;
+	u32 grbm_status;
+	u32 grbm_status_se0, grbm_status_se1;
+	struct r100_gpu_lockup *lockup = &rdev->config.evergreen.lockup;
+	int r;
+
+	srbm_status = RREG32(SRBM_STATUS);
+	grbm_status = RREG32(GRBM_STATUS);
+	grbm_status_se0 = RREG32(GRBM_STATUS_SE0);
+	grbm_status_se1 = RREG32(GRBM_STATUS_SE1);
+	if (!(grbm_status & GUI_ACTIVE)) {
+		r100_gpu_lockup_update(lockup, &rdev->cp);
+		return false;
+	}
+	/* force CP activities */
+	r = radeon_ring_lock(rdev, 2);
+	if (!r) {
+		/* PACKET2 NOP */
+		radeon_ring_write(rdev, 0x80000000);
+		radeon_ring_write(rdev, 0x80000000);
+		radeon_ring_unlock_commit(rdev);
+	}
+	rdev->cp.rptr = RREG32(CP_RB_RPTR);
+	return r100_gpu_cp_is_lockup(rdev, lockup, &rdev->cp);
 }
 
 static int evergreen_gpu_soft_reset(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 77169e8..e6b509a 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1037,6 +1037,7 @@ struct evergreen_asic {
 	unsigned tiling_npipes;
 	unsigned tiling_group_size;
 	unsigned tile_config;
+	struct r100_gpu_lockup	lockup;
 };
 
 union radeon_asic_config {
-- 
1.7.1.1