[Mesa-dev] [PATCH 4/4] freedreno: implement emit_string_marker

[Rob Clark]

From: Rob Clark <robclark at freedesktop.org>

Writes string to cmdstream in payload of a no-op packet.

Signed-off-by: Rob Clark <robclark at freedesktop.org>
---
 src/gallium/drivers/freedreno/freedreno_context.c | 27 +++++++++++++++++++++++
 src/gallium/drivers/freedreno/freedreno_screen.c  |  2 +-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/freedreno/freedreno_context.c b/src/gallium/drivers/freedreno/freedreno_context.c
index 0b6b9fb..c5ea86f 100644
--- a/src/gallium/drivers/freedreno/freedreno_context.c
+++ b/src/gallium/drivers/freedreno/freedreno_context.c
@@ -141,6 +141,32 @@ fd_context_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
 	}
 }
 
+/**
+ * emit marker string as payload of a no-op packet, which can be
+ * decoded by cffdump.
+ */
+static void
+fd_emit_string_marker(struct pipe_context *pctx, const char *string, int len)
+{
+	struct fd_context *ctx = fd_context(pctx);
+	struct fd_ringbuffer *ring = ctx->ring;
+	const uint32_t *buf = (const void *)string;
+
+	OUT_PKT3(ring, CP_NOP, align(len, 4) / 4);
+	while (len >= 4) {
+		OUT_RING(ring, *buf);
+		buf++;
+		len -= 4;
+	}
+
+	/* copy remainder bytes without reading past end of input string: */
+	if (len > 0) {
+		uint32_t w = 0;
+		memcpy(&w, buf, len);
+		OUT_RING(ring, w);
+	}
+}
+
 void
 fd_context_destroy(struct pipe_context *pctx)
 {
@@ -207,6 +233,7 @@ fd_context_init(struct fd_context *ctx, struct pipe_screen *pscreen,
 	pctx->screen = pscreen;
 	pctx->priv = priv;
 	pctx->flush = fd_context_flush;
+	pctx->emit_string_marker = fd_emit_string_marker;
 
 	for (i = 0; i < ARRAY_SIZE(ctx->rings); i++) {
 		ctx->rings[i] = fd_ringbuffer_new(screen->pipe, 0x100000);
diff --git a/src/gallium/drivers/freedreno/freedreno_screen.c b/src/gallium/drivers/freedreno/freedreno_screen.c
index cfbf59a..d5a730c 100644
--- a/src/gallium/drivers/freedreno/freedreno_screen.c
+++ b/src/gallium/drivers/freedreno/freedreno_screen.c
@@ -155,6 +155,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_USER_CONSTANT_BUFFERS:
 	case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 	case PIPE_CAP_VERTEXID_NOBASE:
+	case PIPE_CAP_STRING_MARKER:
 		return 1;
 
 	case PIPE_CAP_SHADER_STENCIL_EXPORT:
@@ -164,7 +165,6 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_TEXTURE_BARRIER:
 	case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 	case PIPE_CAP_COMPUTE:
-	case PIPE_CAP_STRING_MARKER:
 		return 0;
 
 	case PIPE_CAP_SM3:
-- 
2.5.0