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drm/radeon: improve semaphore debugging on lockup
Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -654,6 +654,8 @@ struct radeon_ring {
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u32 ptr_reg_mask;
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u32 nop;
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u32 idx;
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u64 last_semaphore_signal_addr;
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u64 last_semaphore_wait_addr;
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};
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/*
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@ -784,6 +784,8 @@ static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
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}
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seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr);
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seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n", ring->rptr, ring->rptr);
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seq_printf(m, "last semaphore signal addr : 0x%016llx\n", ring->last_semaphore_signal_addr);
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seq_printf(m, "last semaphore wait addr : 0x%016llx\n", ring->last_semaphore_wait_addr);
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seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
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seq_printf(m, "%u dwords in ring\n", count);
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/* print 8 dw before current rptr as often it's the last executed
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@ -95,6 +95,10 @@ int radeon_semaphore_sync_rings(struct radeon_device *rdev,
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/* we assume caller has already allocated space on waiters ring */
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radeon_semaphore_emit_wait(rdev, waiter, semaphore);
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/* for debugging lockup only, used by sysfs debug files */
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rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr;
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rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr;
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return 0;
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}
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