isl: Add support for HiZ surfaces

Reviewed-by: Chad Versace <[email protected]>

7 files changed, 63 insertions, 3 deletions

diff --git a/src/intel/isl/isl.c b/src/intel/isl/isl.c
index aaf4d1c8c77..7df649eff0a 100644
--- a/src/intel/isl/isl.c
+++ b/src/intel/isl/isl.c
@@ -167,6 +167,16 @@ isl_tiling_get_info(const struct isl_device *dev,
       break;
    }
 
+   case ISL_TILING_HIZ:
+      /* HiZ buffers are required to have ISL_FORMAT_HIZ which is an 8x4
+       * 128bpb format.  The tiling has the same physical dimensions as
+       * Y-tiling but actually has two HiZ columns per Y-tiled column.
+       */
+      assert(bs == 16);
+      logical_el = isl_extent2d(16, 16);
+      phys_B = isl_extent2d(128, 32);
+      break;
+
    default:
       unreachable("not reached");
    } /* end switch */
@@ -221,6 +231,7 @@ isl_surf_choose_tiling(const struct isl_device *dev,
       CHOOSE(ISL_TILING_LINEAR);
    }
 
+   CHOOSE(ISL_TILING_HIZ);
    CHOOSE(ISL_TILING_Ys);
    CHOOSE(ISL_TILING_Yf);
    CHOOSE(ISL_TILING_Y0);
@@ -314,7 +325,8 @@ isl_choose_array_pitch_span(const struct isl_device *dev,
             return ISL_ARRAY_PITCH_SPAN_COMPACT;
          }
 
-         if (isl_surf_usage_is_depth_or_stencil(info->usage)) {
+         if (isl_surf_usage_is_depth_or_stencil(info->usage) ||
+             (info->usage & ISL_SURF_USAGE_HIZ_BIT)) {
             /* From the Ivybridge PRM >> Volume 1 Part 1: Graphics Core >>
              * Section 6.18.4.7: Surface Arrays (p112):
              *
@@ -388,6 +400,15 @@ isl_choose_image_alignment_el(const struct isl_device *dev,
                               enum isl_msaa_layout msaa_layout,
                               struct isl_extent3d *image_align_el)
 {
+   if (info->format == ISL_FORMAT_HIZ) {
+      assert(ISL_DEV_GEN(dev) >= 6);
+      /* HiZ surfaces are always aligned to 16x8 pixels in the primary surface
+       * which works out to 2x2 HiZ elments.
+       */
+      *image_align_el = isl_extent3d(2, 2, 1);
+      return;
+   }
+
    if (ISL_DEV_GEN(dev) >= 9) {
       gen9_choose_image_alignment_el(dev, info, tiling, msaa_layout,
                                      image_align_el);
diff --git a/src/intel/isl/isl.h b/src/intel/isl/isl.h
index a86688c91bc..8c01d6edb89 100644
--- a/src/intel/isl/isl.h
+++ b/src/intel/isl/isl.h
@@ -345,6 +345,14 @@ enum isl_format {
    ISL_FORMAT_ASTC_LDR_2D_12X10_FLT16 =                        638,
    ISL_FORMAT_ASTC_LDR_2D_12X12_FLT16 =                        639,
 
+   /* The formats that follow are internal to ISL and as such don't have an
+    * explicit number.  We'll just let the C compiler assign it for us.  Any
+    * actual hardware formats *must* come before these in the list.
+    */
+
+   /* Formats for color compression surfaces */
+   ISL_FORMAT_HIZ,
+
    /* Hardware doesn't understand this out-of-band value */
    ISL_FORMAT_UNSUPPORTED =                             UINT16_MAX,
 };
@@ -392,6 +400,9 @@ enum isl_txc {
    ISL_TXC_ETC1,
    ISL_TXC_ETC2,
    ISL_TXC_ASTC,
+
+   /* Used for auxiliary surface formats */
+   ISL_TXC_HIZ,
 };
 
 /**
@@ -410,6 +421,7 @@ enum isl_tiling {
    ISL_TILING_Y0, /**< Legacy Y tiling */
    ISL_TILING_Yf, /**< Standard 4K tiling. The 'f' means "four". */
    ISL_TILING_Ys, /**< Standard 64K tiling. The 's' means "sixty-four". */
+   ISL_TILING_HIZ, /**< Tiling format for HiZ surfaces */
 };
 
 /**
@@ -423,6 +435,7 @@ typedef uint32_t isl_tiling_flags_t;
 #define ISL_TILING_Y0_BIT                 (1u << ISL_TILING_Y0)
 #define ISL_TILING_Yf_BIT                 (1u << ISL_TILING_Yf)
 #define ISL_TILING_Ys_BIT                 (1u << ISL_TILING_Ys)
+#define ISL_TILING_HIZ_BIT                (1u << ISL_TILING_HIZ)
 #define ISL_TILING_ANY_MASK               (~0u)
 #define ISL_TILING_NON_LINEAR_MASK        (~ISL_TILING_LINEAR_BIT)
 
@@ -505,6 +518,7 @@ typedef uint64_t isl_surf_usage_flags_t;
 #define ISL_SURF_USAGE_DISPLAY_FLIP_X_BIT      (1u << 10)
 #define ISL_SURF_USAGE_DISPLAY_FLIP_Y_BIT      (1u << 11)
 #define ISL_SURF_USAGE_STORAGE_BIT             (1u << 12)
+#define ISL_SURF_USAGE_HIZ_BIT                 (1u << 13)
 /** @} */
 
 /**
@@ -968,6 +982,9 @@ isl_format_has_bc_compression(enum isl_format fmt)
    case ISL_TXC_ETC2:
    case ISL_TXC_ASTC:
       return false;
+
+   case ISL_TXC_HIZ:
+      unreachable("Should not be called on an aux surface");
    }
 
    unreachable("bad texture compression mode");
diff --git a/src/intel/isl/isl_format_layout.csv b/src/intel/isl/isl_format_layout.csv
index f90fbe063b5..3e681e8a4a4 100644
--- a/src/intel/isl/isl_format_layout.csv
+++ b/src/intel/isl/isl_format_layout.csv
@@ -314,3 +314,4 @@ ASTC_LDR_2D_10X8_FLT16      , 128, 10,  8,  1, sf16, sf16, sf16, sf16,     ,
 ASTC_LDR_2D_10X10_FLT16     , 128, 10, 10,  1, sf16, sf16, sf16, sf16,     ,     ,    , linear,  astc
 ASTC_LDR_2D_12X10_FLT16     , 128, 12, 10,  1, sf16, sf16, sf16, sf16,     ,     ,    , linear,  astc
 ASTC_LDR_2D_12X12_FLT16     , 128, 12, 12,  1, sf16, sf16, sf16, sf16,     ,     ,    , linear,  astc
+HIZ                         , 128,  8,  4,  1,     ,     ,     ,     ,     ,     ,    ,       ,   hiz
diff --git a/src/intel/isl/isl_gen6.c b/src/intel/isl/isl_gen6.c
index 699aa41d7ba..de95a8fb280 100644
--- a/src/intel/isl/isl_gen6.c
+++ b/src/intel/isl/isl_gen6.c
@@ -89,6 +89,9 @@ gen6_choose_image_alignment_el(const struct isl_device *dev,
                                enum isl_msaa_layout msaa_layout,
                                struct isl_extent3d *image_align_el)
 {
+   /* Handled by isl_choose_image_alignment_el */
+   assert(info->format != ISL_FORMAT_HIZ);
+
    /* Note that the surface's horizontal image alignment is not programmable
     * on Sandybridge.
     *
diff --git a/src/intel/isl/isl_gen7.c b/src/intel/isl/isl_gen7.c
index d9b0c080a4c..1cdb52d3c4e 100644
--- a/src/intel/isl/isl_gen7.c
+++ b/src/intel/isl/isl_gen7.c
@@ -111,7 +111,8 @@ gen7_choose_msaa_layout(const struct isl_device *dev,
     * In the table above, MSFMT_MSS refers to ISL_MSAA_LAYOUT_ARRAY, and
     * MSFMT_DEPTH_STENCIL refers to ISL_MSAA_LAYOUT_INTERLEAVED.
     */
-   if (isl_surf_usage_is_depth_or_stencil(info->usage))
+   if (isl_surf_usage_is_depth_or_stencil(info->usage) ||
+       (info->usage & ISL_SURF_USAGE_HIZ_BIT))
       require_interleaved = true;
 
    /* From the Ivybridge PRM, Volume 4 Part 1 p72, SURFACE_STATE, Multisampled
@@ -230,6 +231,13 @@ gen7_filter_tiling(const struct isl_device *dev,
       *flags &= ~ISL_TILING_W_BIT;
    }
 
+   /* The HiZ format and tiling always go together */
+   if (info->format == ISL_FORMAT_HIZ) {
+      *flags &= ISL_TILING_HIZ_BIT;
+   } else {
+      *flags &= ~ISL_TILING_HIZ_BIT;
+   }
+
    if (info->usage & (ISL_SURF_USAGE_DISPLAY_ROTATE_90_BIT |
                       ISL_SURF_USAGE_DISPLAY_ROTATE_180_BIT |
                       ISL_SURF_USAGE_DISPLAY_ROTATE_270_BIT)) {
@@ -384,6 +392,9 @@ gen7_choose_image_alignment_el(const struct isl_device *dev,
                                enum isl_msaa_layout msaa_layout,
                                struct isl_extent3d *image_align_el)
 {
+   /* Handled by isl_choose_image_alignment_el */
+   assert(info->format != ISL_FORMAT_HIZ);
+
    /* IVB+ does not support combined depthstencil. */
    assert(!isl_surf_usage_is_depth_and_stencil(info->usage));
 
diff --git a/src/intel/isl/isl_gen8.c b/src/intel/isl/isl_gen8.c
index a46427aacc8..ff35d5f868f 100644
--- a/src/intel/isl/isl_gen8.c
+++ b/src/intel/isl/isl_gen8.c
@@ -84,7 +84,8 @@ gen8_choose_msaa_layout(const struct isl_device *dev,
    if (isl_format_is_yuv(info->format))
       return false;
 
-   if (isl_surf_usage_is_depth_or_stencil(info->usage))
+   if (isl_surf_usage_is_depth_or_stencil(info->usage) ||
+       (info->usage & ISL_SURF_USAGE_HIZ_BIT))
       require_interleaved = true;
 
    if (require_array && require_interleaved)
@@ -198,6 +199,9 @@ gen8_choose_image_alignment_el(const struct isl_device *dev,
                                enum isl_msaa_layout msaa_layout,
                                struct isl_extent3d *image_align_el)
 {
+   /* Handled by isl_choose_image_alignment_el */
+   assert(info->format != ISL_FORMAT_HIZ);
+
    assert(!isl_tiling_is_std_y(tiling));
 
    /* The below text from the Broadwell PRM provides some insight into the
diff --git a/src/intel/isl/isl_gen9.c b/src/intel/isl/isl_gen9.c
index 39f409245cd..ff0dec955a5 100644
--- a/src/intel/isl/isl_gen9.c
+++ b/src/intel/isl/isl_gen9.c
@@ -103,6 +103,9 @@ gen9_choose_image_alignment_el(const struct isl_device *dev,
                                enum isl_msaa_layout msaa_layout,
                                struct isl_extent3d *image_align_el)
 {
+   /* Handled by isl_choose_image_alignment_el */
+   assert(info->format != ISL_FORMAT_HIZ);
+
    /* This BSpec text provides some insight into the hardware's alignment
     * requirements [Skylake BSpec > Memory Views > Common Surface Formats >
     * Surface Layout and Tiling > 2D Surfaces]: