1 files changed, 91 insertions, 0 deletions
diff --git a/src/vulkan/isl.c b/src/vulkan/isl.c
new file mode 100644
index 00000000000..ebfd2bfb104
--- /dev/null
+++ b/src/vulkan/isl.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2015 Intel Corporation
+ *
+ *  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.
+ */
+
+#include <assert.h>
+
+#include "mesa/main/imports.h"
+
+#include "isl.h"
+
+/**
+ * Log base 2, rounding towards zero.
+ */
+static inline uint32_t
+isl_log2u(uint32_t n)
+{
+   assert(n != 0);
+   return 31 - __builtin_clz(n);
+}
+
+void
+isl_device_init(struct isl_device *dev,
+                const struct brw_device_info *info)
+{
+   dev->info = info;
+}
+
+/**
+ * The returned extent's units are (width=bytes, height=rows).
+ */
+void
+isl_tiling_get_extent(const struct isl_device *dev,
+                      enum isl_tiling tiling,
+                      uint32_t cpp,
+                      struct isl_extent2d *e)
+{
+   static const struct isl_extent2d legacy_extents[] = {
+      [ISL_TILING_LINEAR]  = {   1,   1 },
+      [ISL_TILING_X]       = { 512,   8 },
+      [ISL_TILING_Y]       = { 128,  32 },
+      [ISL_TILING_W]       = { 128,  32 },
+   };
+
+   static const struct isl_extent2d yf_extents[] = {
+      /*cpp*/
+      /* 1*/ [0] = {   64, 64 },
+      /* 2*/ [1] = {  128, 32 },
+      /* 4*/ [2] = {  128, 32 },
+      /* 8*/ [3] = {  256, 16 },
+      /*16*/ [4] = {  256, 16 },
+   };
+
+   assert(cpp > 0);
+
+   switch (tiling) {
+   case ISL_TILING_LINEAR:
+   case ISL_TILING_X:
+   case ISL_TILING_Y:
+   case ISL_TILING_W:
+      *e = legacy_extents[tiling];
+      return;
+   case ISL_TILING_Yf:
+   case ISL_TILING_Ys:
+      assert(_mesa_is_pow_two(cpp));
+      *e = yf_extents[isl_log2u(cpp)];
+      if (tiling == ISL_TILING_Ys) {
+         e->width *= 4;
+         e->height *= 4;
+      }
+      return;
+   }
+}