freedreno/a5xx: Move resource layout to fdl.

I'm working on fixing the 3D layouts in CI so we can stabilize it, but I
wanted unit tests using the texturator scripts to make sure I don't break
things.  This also makes a5xx and a6xx layout easily comparable again.

This is a straightforward move of the code with prsc references replaced
by arguments in the style of fdl6.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5127>

3 files changed, 146 insertions, 0 deletions

diff --git a/src/freedreno/fdl/fd5_layout.c b/src/freedreno/fdl/fd5_layout.c
new file mode 100644
index 00000000000..da74b18fe59
--- /dev/null
+++ b/src/freedreno/fdl/fd5_layout.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2018 Rob Clark <[email protected]>
+ * Copyright © 2018-2019 Google, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include <stdio.h>
+
+#include "freedreno_layout.h"
+
+/* indexed by cpp: */
+static const struct {
+	unsigned pitchalign;
+	unsigned heightalign;
+} tile_alignment[] = {
+	[1]  = { 128, 32 },
+	[2]  = { 128, 16 },
+	[3]  = { 128, 16 },
+	[4]  = {  64, 16 },
+	[8]  = {  64, 16 },
+	[12] = {  64, 16 },
+	[16] = {  64, 16 },
+};
+
+void
+fdl5_layout(struct fdl_layout *layout,
+		enum pipe_format format, uint32_t nr_samples,
+		uint32_t width0, uint32_t height0, uint32_t depth0,
+		uint32_t mip_levels, uint32_t array_size, bool is_3d)
+{
+	const struct util_format_description *format_desc =
+		util_format_description(format);
+
+	assert(nr_samples > 0);
+	layout->width0 = width0;
+	layout->height0 = height0;
+	layout->depth0 = depth0;
+
+	layout->cpp = util_format_get_blocksize(format);
+	layout->cpp *= nr_samples;
+	layout->cpp_shift = ffs(layout->cpp) - 1;
+
+	layout->format = format;
+	layout->nr_samples = nr_samples;
+	layout->layer_first = !is_3d;
+
+	uint32_t pitchalign;
+	uint32_t heightalign;
+	uint32_t width = width0;
+	uint32_t height = height0;
+	uint32_t depth = depth0;
+	/* in layer_first layout, the level (slice) contains just one
+	 * layer (since in fact the layer contains the slices)
+	 */
+	uint32_t layers_in_level = layout->layer_first ? 1 : array_size;
+
+	heightalign = tile_alignment[layout->cpp].heightalign;
+
+	for (uint32_t level = 0; level < mip_levels; level++) {
+		struct fdl_slice *slice = &layout->slices[level];
+		uint32_t tile_mode = fdl_tile_mode(layout, level);
+		uint32_t aligned_height = height;
+		uint32_t blocks;
+
+		if (tile_mode) {
+			pitchalign = tile_alignment[layout->cpp].pitchalign;
+			aligned_height = align(aligned_height, heightalign);
+		} else {
+			pitchalign = 64;
+
+			/* The blits used for mem<->gmem work at a granularity of
+			 * 32x32, which can cause faults due to over-fetch on the
+			 * last level.  The simple solution is to over-allocate a
+			 * bit the last level to ensure any over-fetch is harmless.
+			 * The pitch is already sufficiently aligned, but height
+			 * may not be:
+			 */
+			if (level == mip_levels - 1)
+				aligned_height = align(aligned_height, 32);
+		}
+
+		unsigned pitch_pixels;
+		if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC)
+			pitch_pixels =
+				util_align_npot(width, pitchalign * util_format_get_blockwidth(format));
+		else
+			pitch_pixels = align(width, pitchalign);
+
+		slice->offset = layout->size;
+		blocks = util_format_get_nblocks(format, pitch_pixels, aligned_height);
+		slice->pitch = util_format_get_nblocksx(format, pitch_pixels) *
+			layout->cpp;
+
+		const int alignment = is_3d ? 4096 : 1;
+
+		/* 1d array and 2d array textures must all have the same layer size
+		 * for each miplevel on a3xx. 3d textures can have different layer
+		 * sizes for high levels, but the hw auto-sizer is buggy (or at least
+		 * different than what this code does), so as soon as the layer size
+		 * range gets into range, we stop reducing it.
+		 */
+		if (is_3d && (
+					level == 1 ||
+					(level > 1 && layout->slices[level - 1].size0 > 0xf000)))
+			slice->size0 = align(blocks * layout->cpp, alignment);
+		else if (level == 0 || layout->layer_first || alignment == 1)
+			slice->size0 = align(blocks * layout->cpp, alignment);
+		else
+			slice->size0 = layout->slices[level - 1].size0;
+
+		layout->size += slice->size0 * depth * layers_in_level;
+
+		width = u_minify(width, 1);
+		height = u_minify(height, 1);
+		depth = u_minify(depth, 1);
+	}
+}
+
diff --git a/src/freedreno/fdl/freedreno_layout.h b/src/freedreno/fdl/freedreno_layout.h
index a6a12ba2333..6753890bf4a 100644
--- a/src/freedreno/fdl/freedreno_layout.h
+++ b/src/freedreno/fdl/freedreno_layout.h
@@ -185,6 +185,12 @@ void
 fdl_layout_buffer(struct fdl_layout *layout, uint32_t size);
 
 void
+fdl5_layout(struct fdl_layout *layout,
+		enum pipe_format format, uint32_t nr_samples,
+		uint32_t width0, uint32_t height0, uint32_t depth0,
+		uint32_t mip_levels, uint32_t array_size, bool is_3d);
+
+void
 fdl6_layout(struct fdl_layout *layout,
 		enum pipe_format format, uint32_t nr_samples,
 		uint32_t width0, uint32_t height0, uint32_t depth0,
diff --git a/src/freedreno/fdl/meson.build b/src/freedreno/fdl/meson.build
index 0bbe1b257a5..6ed83b50172 100644
--- a/src/freedreno/fdl/meson.build
+++ b/src/freedreno/fdl/meson.build
@@ -21,6 +21,7 @@
 libfreedreno_layout = static_library(
   'freedreno_layout',
   [
+    'fd5_layout.c',
     'fd6_layout.c',
     'freedreno_layout.c',
   ],