tweaks: Add cap and tweak support to the guest-host protocol

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/virgl_hw.h

@@ -255,6 +255,7 @@ enum virgl_formats {
 #define VIRGL_CAP_INDIRECT_INPUT_ADDR  (1 << 25)
 #define VIRGL_CAP_COPY_TRANSFER        (1 << 26)
 #define VIRGL_CAP_CLIP_HALFZ           (1 << 27)
+#define VIRGL_CAP_APP_TWEAK_SUPPORT    (1 << 28)
 
 /* virgl bind flags - these are compatible with mesa 10.5 gallium.
  * but are fixed, no other should be passed to virgl either.

src/virgl_protocol.h

@@ -101,6 +101,7 @@ enum virgl_context_cmd {
    VIRGL_CCMD_TRANSFER3D,
    VIRGL_CCMD_END_TRANSFERS,
    VIRGL_CCMD_COPY_TRANSFER3D,
+   VIRGL_CCMD_SET_TWEAKS,
    VIRGL_MAX_COMMANDS
 };
 
@@ -592,6 +593,11 @@ enum virgl_context_cmd {
 #define VIRGL_COPY_TRANSFER3D_SRC_RES_OFFSET 13
 #define VIRGL_COPY_TRANSFER3D_SYNCHRONIZED 14
 
+/* set tweak flags */
+#define VIRGL_SET_TWEAKS_SIZE 2
+#define VIRGL_SET_TWEAKS_ID 1
+#define VIRGL_SET_TWEAKS_VALUE 2
+
 enum vrend_tweak_type {
    virgl_tweak_undefined
 };

src/vrend_debug.c

@@ -75,6 +75,7 @@ static const char *command_names[VIRGL_MAX_COMMANDS] = {
    "TRANSFER3D",
    "END_TRANSFERS",
    "COPY_TRANSFER3D",
+   "TWEAK"
 };
 
 static const char *object_type_names[VIRGL_MAX_OBJECTS] = {

src/vrend_decode.c

@@ -35,6 +35,7 @@
 #include "vrend_object.h"
 #include "tgsi/tgsi_text.h"
 #include "vrend_debug.h"
+#include "vrend_tweaks.h"
 
 /* decode side */
 #define DECODE_MAX_TOKENS 8000
@@ -1321,6 +1322,21 @@ static int vrend_decode_set_debug_mask(struct vrend_decode_ctx *ctx, int length)
    return 0;
 }
 
+static int vrend_decode_set_tweaks(struct vrend_decode_ctx *ctx, int length)
+{
+   VREND_DEBUG(dbg_tweak, NULL, "Received TWEAK set command\n");
+
+   if (length < VIRGL_SET_TWEAKS_SIZE)
+      return EINVAL;
+
+   uint32_t tweak_id = get_buf_entry(ctx, VIRGL_SET_TWEAKS_ID);
+   uint32_t tweak_value = get_buf_entry(ctx, VIRGL_SET_TWEAKS_VALUE);
+
+   vrend_set_active_tweaks(vrend_get_context_tweaks(ctx->grctx), tweak_id, tweak_value);
+   return 0;
+}
+
+
 static int vrend_decode_transfer3d(struct vrend_decode_ctx *ctx, int length, uint32_t ctx_id)
 {
    struct pipe_box box;
@@ -1610,6 +1626,9 @@ int vrend_decode_block(uint32_t ctx_id, uint32_t *block, int ndw)
       case VIRGL_CCMD_END_TRANSFERS:
          ret = 0;
          break;
+      case VIRGL_CCMD_SET_TWEAKS:
+         ret = vrend_decode_set_tweaks(gdctx, len);
+         break;
       default:
          ret = EINVAL;
       }

src/vrend_renderer.h

@@ -29,6 +29,7 @@
 #include "util/u_inlines.h"
 #include "virgl_protocol.h"
 #include "vrend_debug.h"
+#include "vrend_tweaks.h"
 #include "vrend_iov.h"
 #include "virgl_hw.h"
 #include <epoxy/gl.h>