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drm/radeon: improve semaphore debugging on lockup

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Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerome Glisse 2013-01-11 15:19:43 -05:00 committed by Alex Deucher
parent c18b117049
commit 5f0839c11e
3 changed files with 8 additions and 0 deletions
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2
drivers/gpu/drm/radeon/radeon.h
View file

@ -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;
};
/*

2
drivers/gpu/drm/radeon/radeon_ring.c
View file

@ -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

4
drivers/gpu/drm/radeon/radeon_semaphore.c
View file

@ -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;
}