From: Grigori Goronzy <greg@chown.ath.cx>
Date: Tue, 12 May 2015 00:22:12 +0000 (+0200)
Subject: clover: implement CL_MEM_ALLOC_HOST_PTR
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5c495e86388b55af067677e8608eb124a5d70d29;p=mesa.git

clover: implement CL_MEM_ALLOC_HOST_PTR

This flag is typically used to request pinned host memory, to avoid
any copies between GPU and CPU.

This improves throughput with an older OpenCL app which I unfortunately
can't publish due to its licensing.

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
---

diff --git a/src/gallium/state_trackers/clover/core/resource.cpp b/src/gallium/state_trackers/clover/core/resource.cpp
index bcf87e15480..8ed4c4284e1 100644
--- a/src/gallium/state_trackers/clover/core/resource.cpp
+++ b/src/gallium/state_trackers/clover/core/resource.cpp
@@ -137,6 +137,10 @@ root_resource::root_resource(clover::device &dev, memory_obj &obj,
                 PIPE_BIND_TRANSFER_READ |
                 PIPE_BIND_TRANSFER_WRITE);
 
+   if (obj.flags() & CL_MEM_ALLOC_HOST_PTR) {
+      info.usage = PIPE_USAGE_STAGING;
+   }
+
    pipe = dev.pipe->resource_create(dev.pipe, &info);
    if (!pipe)
       throw error(CL_OUT_OF_RESOURCES);