[Mesa-dev] [PATCH] i965: Set compute shared shared memory max to 64k

[Jordan Justen]

See Ivy Bridge PRM, Volume 2, Part 2, 1.8.4 INTERFACE_DESCRIPTOR_DATA:

DWORD 5, bits 20:16: "This field indicates how much shared local
memory the thread group requires. The amount is specified in 4k
blocks, but only powers of 2 are allowed: 0, 4k, 8k, 16k, 32k and 64k
per half-slice."

For Haswell, see Volume 2d, INTERFACE_DESCRIPTOR_DATA:

DWORD 5, bits 20:16: With text identical to the Ivy Bridge PRM.

For Broadwell, see Volume 2d, INTERFACE_DESCRIPTOR_DATA:

DWORD 6, bits 20:16: With text identical to the Ivy Bridge PRM.

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
 src/mesa/drivers/dri/i965/brw_context.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 972b62e..6671c8a 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -710,7 +710,7 @@ brw_initialize_cs_context_constants(struct brw_context *brw, unsigned max_thread
    ctx->Const.MaxComputeWorkGroupSize[1] = max_invocations;
    ctx->Const.MaxComputeWorkGroupSize[2] = max_invocations;
    ctx->Const.MaxComputeWorkGroupInvocations = max_invocations;
-   ctx->Const.MaxComputeSharedMemorySize = 32768;
+   ctx->Const.MaxComputeSharedMemorySize = 64 * 1024;
 }
 
 /**
-- 
2.7.0