radeonsi: Allocate buffers for DCC.

As the alignment requirements can be 32 KiB or more, also adding
an aligned buffer creation function.

DCC is disabled for textures that can be shared as sharing the
DCC buffers has not been implemented yet.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

4 files changed, 50 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index f341ecb..0dc6c91 100644
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -443,6 +443,27 @@ struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 	return &rbuffer->b.b;
 }
 
+struct pipe_resource *r600_aligned_buffer_create(struct pipe_screen *screen,
+						 unsigned bind,
+						 unsigned usage,
+						 unsigned size,
+						 unsigned alignment)
+{
+	struct pipe_resource buffer;
+
+	memset(&buffer, 0, sizeof buffer);
+	buffer.target = PIPE_BUFFER;
+	buffer.format = PIPE_FORMAT_R8_UNORM;
+	buffer.bind = bind;
+	buffer.usage = usage;
+	buffer.flags = 0;
+	buffer.width0 = size;
+	buffer.height0 = 1;
+	buffer.depth0 = 1;
+	buffer.array_size = 1;
+	return r600_buffer_create(screen, &buffer, alignment);
+}
+
 struct pipe_resource *
 r600_buffer_from_user_memory(struct pipe_screen *screen,
 			     const struct pipe_resource *templ,
diff --git a/src/gallium/drivers/radeon/r600_pipe_common.h b/src/gallium/drivers/radeon/r600_pipe_common.h
index b58b500..1eec596 100644
--- a/src/gallium/drivers/radeon/r600_pipe_common.h
+++ b/src/gallium/drivers/radeon/r600_pipe_common.h
@@ -214,6 +214,7 @@ struct r600_texture {
 	struct r600_fmask_info		fmask;
 	struct r600_cmask_info		cmask;
 	struct r600_resource		*cmask_buffer;
+	struct r600_resource		*dcc_buffer;
 	unsigned			cb_color_info; /* fast clear enable bit */
 	unsigned			color_clear_value[2];
 
@@ -489,6 +490,11 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
 struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 					 const struct pipe_resource *templ,
 					 unsigned alignment);
+struct pipe_resource * r600_aligned_buffer_create(struct pipe_screen *screen,
+						  unsigned bind,
+						  unsigned usage,
+						  unsigned size,
+						  unsigned alignment);
 struct pipe_resource *
 r600_buffer_from_user_memory(struct pipe_screen *screen,
 			     const struct pipe_resource *templ,
diff --git a/src/gallium/drivers/radeon/r600_texture.c b/src/gallium/drivers/radeon/r600_texture.c
index fc69f48..fffb9ef 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -268,6 +268,7 @@ static void r600_texture_destroy(struct pipe_screen *screen,
 	if (rtex->cmask_buffer != &rtex->resource) {
 	    pipe_resource_reference((struct pipe_resource**)&rtex->cmask_buffer, NULL);
 	}
+	pipe_resource_reference((struct pipe_resource**)&rtex->dcc_buffer, NULL);
 	pb_reference(&resource->buf, NULL);
 	FREE(rtex);
 }
@@ -482,6 +483,20 @@ static void r600_texture_alloc_cmask_separate(struct r600_common_screen *rscreen
 		rtex->cb_color_info |= EG_S_028C70_FAST_CLEAR(1);
 }
 
+static void vi_texture_alloc_dcc_separate(struct r600_common_screen *rscreen,
+					      struct r600_texture *rtex)
+{
+	rtex->dcc_buffer = (struct r600_resource *)
+		r600_aligned_buffer_create(&rscreen->b, PIPE_BIND_CUSTOM,
+				   PIPE_USAGE_DEFAULT, rtex->surface.dcc_size, rtex->surface.dcc_alignment);
+	if (rtex->dcc_buffer == NULL) {
+		return;
+	}
+
+	r600_screen_clear_buffer(rscreen, &rtex->dcc_buffer->b.b, 0, rtex->surface.dcc_size,
+				 0xFFFFFFFF, true);
+}
+
 static unsigned r600_texture_get_htile_size(struct r600_common_screen *rscreen,
 					    struct r600_texture *rtex)
 {
@@ -621,6 +636,9 @@ r600_texture_create_object(struct pipe_screen *screen,
 				return NULL;
 			}
 		}
+		if (rtex->surface.dcc_enabled) {
+			vi_texture_alloc_dcc_separate(rscreen, rtex);
+		}
 	}
 
 	/* Now create the backing buffer. */
diff --git a/src/gallium/drivers/radeon/radeon_winsys.h b/src/gallium/drivers/radeon/radeon_winsys.h
index 5f13c1e..0178643 100644
--- a/src/gallium/drivers/radeon/radeon_winsys.h
+++ b/src/gallium/drivers/radeon/radeon_winsys.h
@@ -332,6 +332,7 @@ struct radeon_surf_level {
     uint32_t                    nblk_z;
     uint32_t                    pitch_bytes;
     uint32_t                    mode;
+    uint64_t                    dcc_offset;
 };
 
 struct radeon_surf {
@@ -367,6 +368,10 @@ struct radeon_surf {
     uint32_t                    stencil_tiling_index[RADEON_SURF_MAX_LEVEL];
     uint32_t                    pipe_config;
     uint32_t                    num_banks;
+
+    uint64_t                    dcc_size;
+    uint64_t                    dcc_alignment;
+    bool                        dcc_enabled;
 };
 
 struct radeon_bo_list_item {