diff options
Diffstat (limited to 'src/gallium/drivers/radeonsi/si_descriptors.c')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_descriptors.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c b/src/gallium/drivers/radeonsi/si_descriptors.c index 454e12cc835..1644ec7a8d3 100644 --- a/src/gallium/drivers/radeonsi/si_descriptors.c +++ b/src/gallium/drivers/radeonsi/si_descriptors.c @@ -856,6 +856,36 @@ static void si_set_streamout_targets(struct pipe_context *ctx, unsigned old_num_targets = sctx->b.streamout.num_targets; unsigned i, bufidx; + /* We are going to unbind the buffers. Mark which caches need to be flushed. */ + if (sctx->b.streamout.num_targets && sctx->b.streamout.begin_emitted) { + /* Since streamout uses vector writes which go through TC L2 + * and most other clients can use TC L2 as well, we don't need + * to flush it. + * + * The only case which requires flushing it is VGT DMA index + * fetching, which is a rare case. Thus, flag the TC L2 + * dirtiness in the resource and handle it when index fetching + * is used. + */ + for (i = 0; i < sctx->b.streamout.num_targets; i++) + if (sctx->b.streamout.targets[i]) + r600_resource(sctx->b.streamout.targets[i]->b.buffer)->TC_L2_dirty = true; + + /* Invalidate the scalar cache in case a streamout buffer is + * going to be used as a constant buffer. + * + * Invalidate TC L1, because streamout bypasses it (done by + * setting GLC=1 in the store instruction), but it can contain + * outdated data of streamout buffers. + * + * VS_PARTIAL_FLUSH is required if the buffers are going to be + * used as an input immediately. + */ + sctx->b.flags |= SI_CONTEXT_INV_KCACHE | + SI_CONTEXT_INV_TC_L1 | + SI_CONTEXT_VS_PARTIAL_FLUSH; + } + /* Streamout buffers must be bound in 2 places: * 1) in VGT by setting the VGT_STRMOUT registers * 2) as shader resources |