radeon: ensure cmdbuf space for state + AOS is available

The problem is if we find out later we don't have any cmdbuf space but
we've already written the arrays to the DMA buffer object, we end up
emitting the current cmdbuf which has references to the current DMA object
we then send that to the hw and we can't reference the arrays we just emitted
to the old DMA buffer. things go bad, crash boom.

This can probably be tuned further + swtcl probably needs some fixes

diff --git a/src/mesa/drivers/dri/r300/r300_draw.c b/src/mesa/drivers/dri/r300/r300_draw.c
index 20fe8dbf17f7290048e70946e7e4bd6cf8c87e3b..fe8014b35883b776a1c99e32246c83df59f4a730 100644 (file)
--- a/src/mesa/drivers/dri/r300/r300_draw.c
+++ b/src/mesa/drivers/dri/r300/r300_draw.c
@@ -417,6 +417,12 @@ static GLboolean r300TryDrawPrims(GLcontext *ctx,
 
        r300FixupIndexBuffer(ctx, ib, bo, &nr_bo);
 
+       /* ensure we have the cmd buf space in advance to cover
+        * the state + DMA AOS pointers */
+       rcommonEnsureCmdBufSpace(&r300->radeon,
+                           r300->radeon.hw.max_state_size + (50*sizeof(int)),
+                           __FUNCTION__);
+
        r300SetVertexFormat(ctx, arrays, max_index + 1, bo, &nr_bo);
 
        if (r300->fallback)