[PATCH 03/24] drm/radeon: replace gpu_lockup with ring->ready flag

[j.glisse@gmail.com]

From: Christian König <deathsimple@vodafone.de>

It makes no sense at all to have more than one flag.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/radeon/r100.c          |    1 -
 drivers/gpu/drm/radeon/r300.c          |    1 -
 drivers/gpu/drm/radeon/radeon.h        |    1 -
 drivers/gpu/drm/radeon/radeon_device.c |    1 -
 drivers/gpu/drm/radeon/radeon_fence.c  |   36 +++++++++++--------------------
 drivers/gpu/drm/radeon/rs600.c         |    1 -
 6 files changed, 13 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 9e69a95..01e597ad 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2293,7 +2293,6 @@ int r100_asic_reset(struct radeon_device *rdev)
 	if (G_000E40_SE_BUSY(status) || G_000E40_RE_BUSY(status) ||
 		G_000E40_TAM_BUSY(status) || G_000E40_PB_BUSY(status)) {
 		dev_err(rdev->dev, "failed to reset GPU\n");
-		rdev->gpu_lockup = true;
 		ret = -1;
 	} else
 		dev_info(rdev->dev, "GPU reset succeed\n");
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index c5237ab..40baaec 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -444,7 +444,6 @@ int r300_asic_reset(struct radeon_device *rdev)
 	/* Check if GPU is idle */
 	if (G_000E40_GA_BUSY(status) || G_000E40_VAP_BUSY(status)) {
 		dev_err(rdev->dev, "failed to reset GPU\n");
-		rdev->gpu_lockup = true;
 		ret = -1;
 	} else
 		dev_info(rdev->dev, "GPU reset succeed\n");
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index bea99e3..365334b 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1529,7 +1529,6 @@ struct radeon_device {
 	struct radeon_mutex		cs_mutex;
 	struct radeon_wb		wb;
 	struct radeon_dummy_page	dummy_page;
-	bool				gpu_lockup;
 	bool				shutdown;
 	bool				suspend;
 	bool				need_dma32;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index ea7df16..eb63a06 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -714,7 +714,6 @@ int radeon_device_init(struct radeon_device *rdev,
 	rdev->is_atom_bios = false;
 	rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
 	rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
-	rdev->gpu_lockup = false;
 	rdev->accel_working = false;
 
 	DRM_INFO("initializing kernel modesetting (%s 0x%04X:0x%04X 0x%04X:0x%04X).\n",
diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 79ce829..c0ec19d 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -71,14 +71,7 @@ int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence *fence)
 		return 0;
 	}
 	fence->seq = atomic_add_return(1, &rdev->fence_drv[fence->ring].seq);
-	if (!rdev->ring[fence->ring].ready)
-		/* FIXME: cp is not running assume everythings is done right
-		 * away
-		 */
-		radeon_fence_write(rdev, fence->seq, fence->ring);
-	else
-		radeon_fence_ring_emit(rdev, fence->ring, fence);
-
+	radeon_fence_ring_emit(rdev, fence->ring, fence);
 	trace_radeon_fence_emit(rdev->ddev, fence->seq);
 	fence->emitted = true;
 	list_move_tail(&fence->list, &rdev->fence_drv[fence->ring].emitted);
@@ -191,9 +184,6 @@ bool radeon_fence_signaled(struct radeon_fence *fence)
 	if (!fence)
 		return true;
 
-	if (fence->rdev->gpu_lockup)
-		return true;
-
 	write_lock_irqsave(&fence->rdev->fence_lock, irq_flags);
 	signaled = fence->signaled;
 	/* if we are shuting down report all fence as signaled */
@@ -260,18 +250,16 @@ retry:
 		 */
 		if (seq == rdev->fence_drv[fence->ring].last_seq &&
 		    radeon_ring_is_lockup(rdev, fence->ring, &rdev->ring[fence->ring])) {
+
 			/* good news we believe it's a lockup */
 			printk(KERN_WARNING "GPU lockup (waiting for 0x%08X last fence id 0x%08X)\n",
 			     fence->seq, seq);
-			/* FIXME: what should we do ? marking everyone
-			 * as signaled for now
-			 */
-			rdev->gpu_lockup = true;
+
+			/* mark the ring as not ready any more */
+			rdev->ring[fence->ring].ready = false;
 			r = radeon_gpu_reset(rdev);
 			if (r)
 				return r;
-			radeon_fence_write(rdev, fence->seq, fence->ring);
-			rdev->gpu_lockup = false;
 		}
 		timeout = RADEON_FENCE_JIFFIES_TIMEOUT;
 		write_lock_irqsave(&rdev->fence_lock, irq_flags);
@@ -289,10 +277,11 @@ int radeon_fence_wait_next(struct radeon_device *rdev, int ring)
 	struct radeon_fence *fence;
 	int r;
 
-	if (rdev->gpu_lockup) {
-		return 0;
-	}
 	write_lock_irqsave(&rdev->fence_lock, irq_flags);
+	if (!rdev->ring[ring].ready) {
+		write_unlock_irqrestore(&rdev->fence_lock, irq_flags);
+		return -EBUSY;
+	}
 	if (list_empty(&rdev->fence_drv[ring].emitted)) {
 		write_unlock_irqrestore(&rdev->fence_lock, irq_flags);
 		return 0;
@@ -312,10 +301,11 @@ int radeon_fence_wait_last(struct radeon_device *rdev, int ring)
 	struct radeon_fence *fence;
 	int r;
 
-	if (rdev->gpu_lockup) {
-		return 0;
-	}
 	write_lock_irqsave(&rdev->fence_lock, irq_flags);
+	if (!rdev->ring[ring].ready) {
+		write_unlock_irqrestore(&rdev->fence_lock, irq_flags);
+		return -EBUSY;
+	}
 	if (list_empty(&rdev->fence_drv[ring].emitted)) {
 		write_unlock_irqrestore(&rdev->fence_lock, irq_flags);
 		return 0;
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index dc5ec8c..7061aad 100644
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -396,7 +396,6 @@ int rs600_asic_reset(struct radeon_device *rdev)
 	/* Check if GPU is idle */
 	if (G_000E40_GA_BUSY(status) || G_000E40_VAP_BUSY(status)) {
 		dev_err(rdev->dev, "failed to reset GPU\n");
-		rdev->gpu_lockup = true;
 		ret = -1;
 	} else
 		dev_info(rdev->dev, "GPU reset succeed\n");
-- 
1.7.7.6

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