[Mesa-dev] [PATCH 08/18] i965: Wire up initial support for DRI_RENDERER_QUERY extension

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
 src/mesa/drivers/dri/i965/intel_screen.c | 81 ++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index b6b4275..e8a0323 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -27,6 +27,7 @@
 
 #include <errno.h>
 #include <time.h>
+#include <sys/sysinfo.h>
 #include "main/glheader.h"
 #include "main/context.h"
 #include "main/framebuffer.h"
@@ -835,10 +836,90 @@ static struct __DRIimageExtensionRec intelImageExtension = {
     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 };
 
+static int
+brw_query_renderer_integer(__DRIscreen *psp, int param, int *value)
+{
+   const struct intel_screen *const intelScreen =
+      (struct intel_screen *) psp->driverPrivate;
+
+   switch (param) {
+   case __DRI2_RENDERER_VENDOR_ID:
+      value[0] = 0x8086;
+      return 0;
+   case __DRI2_RENDERER_DEVICE_ID:
+      value[0] = intelScreen->deviceID;
+      return 0;
+   case __DRI2_RENDERER_ACCELERATED:
+      value[0] = 1;
+      return 0;
+   case __DRI2_RENDERER_VIDEO_MEMORY: {
+      struct sysinfo info;
+      uint64_t system_memory_bytes;
+      unsigned system_memory_megabytes;
+
+      /* Once a batch uses more than 75% of the maximum mappable size, we
+       * assume that there's some fragmentation, and we start doing extra
+       * flushing, etc.  That's the big cliff apps will care about.
+       *
+       * Can only map 2G onto the GPU through the GTT.
+       */
+      const unsigned gpu_mappable_megabytes = 2 * 1024 * 3 / 4;
+
+      if (sysinfo(&info) < 0)
+         return -1;
+
+      system_memory_bytes = ((uint64_t) info.totalram) * info.mem_unit;
+      system_memory_megabytes = (unsigned) (system_memory_bytes / 1024);
+
+      value[0] = MIN2(system_memory_megabytes, gpu_mappable_megabytes);
+      return 0;
+   }
+   case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
+      value[0] = 1;
+      return 0;
+   case __DRI2_RENDERER_PREFERRED_PROFILE:
+      value[0] = (psp->max_gl_core_version != 0)
+         ? (1U << __DRI_API_OPENGL_CORE) : (1U << __DRI_API_OPENGL);
+      return 0;
+   default:
+      return driQueryRendererIntegerCommon(psp, param, value);
+   }
+
+   return -1;
+}
+
+static int
+brw_query_renderer_string(__DRIscreen *psp, int param, const char **value)
+{
+   const struct intel_screen *intelScreen =
+      (struct intel_screen *) psp->driverPrivate;
+
+   switch (param) {
+   case __DRI2_RENDERER_VENDOR_ID:
+      value[0] = brw_vendor_string;
+      return 0;
+   case __DRI2_RENDERER_DEVICE_ID:
+      value[0] = brw_get_renderer_string(intelScreen->deviceID);
+      return 0;
+   default:
+      break;
+   }
+
+   return -1;
+}
+
+static struct __DRI2rendererQueryExtensionRec intelRendererQueryExtension = {
+   .base = { __DRI2_RENDERER_QUERY, 1 },
+
+   .queryInteger = brw_query_renderer_integer,
+   .queryString = brw_query_renderer_string
+};
+
 static const __DRIextension *intelScreenExtensions[] = {
     &intelTexBufferExtension.base,
     &intelFlushExtension.base,
     &intelImageExtension.base,
+    &intelRendererQueryExtension.base,
     &dri2ConfigQueryExtension.base,
     NULL
 };
-- 
1.8.1.4