From: Tom Stellard <thomas.stell...@amd.com>
We are already emitting a EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT packet
when this flush flag is set, so flushing the dest caches with a
SURFACE_SYNC should not be necessary.
The motivation for this change is that emitting a SURFACE_SYNC packet with
the CB bits set was causing compute shaders to hang on Cayman.
---
src/gallium/drivers/r600/r600_hw_context.c | 28 +++++++++++++---------------
1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/src/gallium/drivers/r600/r600_hw_context.c
b/src/gallium/drivers/r600/r600_hw_context.c
index b4fb3bf..8aebd25 100644
--- a/src/gallium/drivers/r600/r600_hw_context.c
+++ b/src/gallium/drivers/r600/r600_hw_context.c
@@ -231,21 +231,19 @@ void r600_flush_emit(struct r600_context *rctx)
cs->buf[cs->cdw++] = PKT3(PKT3_EVENT_WRITE, 0, 0);
cs->buf[cs->cdw++] =
EVENT_TYPE(EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT) | EVENT_INDEX(0);
if (rctx->chip_class >= EVERGREEN) {
- cp_coher_cntl = S_0085F0_CB0_DEST_BASE_ENA(1) |
- S_0085F0_CB1_DEST_BASE_ENA(1) |
- S_0085F0_CB2_DEST_BASE_ENA(1) |
- S_0085F0_CB3_DEST_BASE_ENA(1) |
- S_0085F0_CB4_DEST_BASE_ENA(1) |
- S_0085F0_CB5_DEST_BASE_ENA(1) |
- S_0085F0_CB6_DEST_BASE_ENA(1) |
- S_0085F0_CB7_DEST_BASE_ENA(1) |
- S_0085F0_CB8_DEST_BASE_ENA(1) |
- S_0085F0_CB9_DEST_BASE_ENA(1) |
- S_0085F0_CB10_DEST_BASE_ENA(1) |
- S_0085F0_CB11_DEST_BASE_ENA(1) |
- S_0085F0_DB_DEST_BASE_ENA(1) |
- S_0085F0_TC_ACTION_ENA(1) |
- S_0085F0_CB_ACTION_ENA(1) |
+ /* We were previously setting the CB and DB bits on
+ * cp_coher_cntl, but this is unnecessary since
+ * we are emitting the
+ * EVENT_TYPE_CACHE_FLUSH_AND_INV_EVENT packet.
+ * Setting the CB bits was causing lockups when using
+ * compute on cayman.
+ *
+ * XXX: Do even need to emit a surface sync packet here?
+ * Prior to e5e4c07e7964a3258ed02b530bcdc24c0650204b
+ * surface sync was not being emitted with the
+ * R600_CONTEXT_FLUSH_AND_INV flag.
+ */
+ cp_coher_cntl = S_0085F0_TC_ACTION_ENA(1) |
S_0085F0_DB_ACTION_ENA(1) |
S_0085F0_SH_ACTION_ENA(1) |
S_0085F0_SMX_ACTION_ENA(1) |
--
1.8.1.5
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