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authorJerome Glisse <jglisse@redhat.com>2013-01-12 00:19:43 +0400
committerAlex Deucher <alexander.deucher@amd.com>2013-01-15 18:07:13 +0400
commit5f0839c11e17d8d942ab02626752f95e30a02a4c (patch)
treecd14814af7d7018af8f52c800bf9d4fc7f87e028 /drivers/gpu
parentc18b1170493de637eea58671da7df5689ce13491 (diff)
downloadlinux-5f0839c11e17d8d942ab02626752f95e30a02a4c.tar.xz
drm/radeon: improve semaphore debugging on lockup
Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon.h2
-rw-r--r--drivers/gpu/drm/radeon/radeon_ring.c2
-rw-r--r--drivers/gpu/drm/radeon/radeon_semaphore.c4
3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 34e52304a525..768e8fec0099 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -654,6 +654,8 @@ struct radeon_ring {
u32 ptr_reg_mask;
u32 nop;
u32 idx;
+ u64 last_semaphore_signal_addr;
+ u64 last_semaphore_wait_addr;
};
/*
diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 141f2b6a9cf2..2430d80b1871 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -784,6 +784,8 @@ static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
}
seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr);
seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n", ring->rptr, ring->rptr);
+ seq_printf(m, "last semaphore signal addr : 0x%016llx\n", ring->last_semaphore_signal_addr);
+ seq_printf(m, "last semaphore wait addr : 0x%016llx\n", ring->last_semaphore_wait_addr);
seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
seq_printf(m, "%u dwords in ring\n", count);
/* print 8 dw before current rptr as often it's the last executed
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
index 97f3ece81cd2..8dcc20f53d73 100644
--- a/drivers/gpu/drm/radeon/radeon_semaphore.c
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -95,6 +95,10 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
/* we assume caller has already allocated space on waiters ring */
radeon_semaphore_emit_wait(rdev, waiter, semaphore);
+ /* for debugging lockup only, used by sysfs debug files */
+ rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr;
+ rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr;
+
return 0;
}