nvc0: implement multisampled images on Maxwell+

Changes in v2:
- make loadSuInfo32() protected without making the rest protected
- move NVC0_SU_INFO_* into nv50_ir_lowering_nvc0.h instead of duplicating
  NVC0_SU_INFO_MS

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>

6 files changed, 48 insertions, 39 deletions

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp
index 209f5c67ab0..c7436e2e297 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp
@@ -315,6 +315,19 @@ GM107LoweringPass::handleSUQ(TexInstruction *suq)
       samples->tex.query = TXQ_TYPE;
    }
 
+   if (suq->tex.target.isMS()) {
+      bld.setPosition(suq, true);
+
+      if (mask & 0x1)
+         bld.mkOp2(OP_SHR, TYPE_U32, suq->getDef(0), suq->getDef(0),
+                   loadSuInfo32(ind, slot, NVC0_SU_INFO_MS(0), suq->tex.bindless));
+      if (mask & 0x2) {
+         int d = util_bitcount(mask & 0x1);
+         bld.mkOp2(OP_SHR, TYPE_U32, suq->getDef(d), suq->getDef(d),
+                   loadSuInfo32(ind, slot, NVC0_SU_INFO_MS(1), suq->tex.bindless));
+      }
+   }
+
    return true;
 }
 
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
index 5723847234e..597dcdffbe2 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
@@ -1712,35 +1712,6 @@ NVC0LoweringPass::loadMsInfo32(Value *ptr, uint32_t off)
       mkLoadv(TYPE_U32, bld.mkSymbol(FILE_MEMORY_CONST, b, TYPE_U32, off), ptr);
 }
 
-/* On nvc0, surface info is obtained via the surface binding points passed
- * to the SULD/SUST instructions.
- * On nve4, surface info is stored in c[] and is used by various special
- * instructions, e.g. for clamping coordinates or generating an address.
- * They couldn't just have added an equivalent to TIC now, couldn't they ?
- */
-#define NVC0_SU_INFO_ADDR   0x00
-#define NVC0_SU_INFO_FMT    0x04
-#define NVC0_SU_INFO_DIM_X  0x08
-#define NVC0_SU_INFO_PITCH  0x0c
-#define NVC0_SU_INFO_DIM_Y  0x10
-#define NVC0_SU_INFO_ARRAY  0x14
-#define NVC0_SU_INFO_DIM_Z  0x18
-#define NVC0_SU_INFO_UNK1C  0x1c
-#define NVC0_SU_INFO_WIDTH  0x20
-#define NVC0_SU_INFO_HEIGHT 0x24
-#define NVC0_SU_INFO_DEPTH  0x28
-#define NVC0_SU_INFO_TARGET 0x2c
-#define NVC0_SU_INFO_BSIZE  0x30
-#define NVC0_SU_INFO_RAW_X  0x34
-#define NVC0_SU_INFO_MS_X   0x38
-#define NVC0_SU_INFO_MS_Y   0x3c
-
-#define NVC0_SU_INFO__STRIDE 0x40
-
-#define NVC0_SU_INFO_DIM(i)  (0x08 + (i) * 8)
-#define NVC0_SU_INFO_SIZE(i) (0x20 + (i) * 4)
-#define NVC0_SU_INFO_MS(i)   (0x38 + (i) * 4)
-
 inline Value *
 NVC0LoweringPass::loadSuInfo32(Value *ptr, int slot, uint32_t off, bool bindless)
 {
@@ -2349,6 +2320,8 @@ NVC0LoweringPass::processSurfaceCoordsGM107(TexInstruction *su)
 
    bld.setPosition(su, false);
 
+   adjustCoordinatesMS(su);
+
    // add texture handle
    switch (su->op) {
    case OP_SUSTP:
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.h b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.h
index 91771fbf7e9..8724c09afd9 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.h
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.h
@@ -23,6 +23,35 @@
 #include "codegen/nv50_ir.h"
 #include "codegen/nv50_ir_build_util.h"
 
+/* On nvc0, surface info is obtained via the surface binding points passed
+ * to the SULD/SUST instructions.
+ * On nve4, surface info is stored in c[] and is used by various special
+ * instructions, e.g. for clamping coordinates or generating an address.
+ * They couldn't just have added an equivalent to TIC now, couldn't they ?
+ */
+#define NVC0_SU_INFO_ADDR   0x00
+#define NVC0_SU_INFO_FMT    0x04
+#define NVC0_SU_INFO_DIM_X  0x08
+#define NVC0_SU_INFO_PITCH  0x0c
+#define NVC0_SU_INFO_DIM_Y  0x10
+#define NVC0_SU_INFO_ARRAY  0x14
+#define NVC0_SU_INFO_DIM_Z  0x18
+#define NVC0_SU_INFO_UNK1C  0x1c
+#define NVC0_SU_INFO_WIDTH  0x20
+#define NVC0_SU_INFO_HEIGHT 0x24
+#define NVC0_SU_INFO_DEPTH  0x28
+#define NVC0_SU_INFO_TARGET 0x2c
+#define NVC0_SU_INFO_BSIZE  0x30
+#define NVC0_SU_INFO_RAW_X  0x34
+#define NVC0_SU_INFO_MS_X   0x38
+#define NVC0_SU_INFO_MS_Y   0x3c
+
+#define NVC0_SU_INFO__STRIDE 0x40
+
+#define NVC0_SU_INFO_DIM(i)  (0x08 + (i) * 8)
+#define NVC0_SU_INFO_SIZE(i) (0x20 + (i) * 4)
+#define NVC0_SU_INFO_MS(i)   (0x38 + (i) * 4)
+
 namespace nv50_ir {
 
 class NVC0LegalizeSSA : public Pass
@@ -119,6 +148,7 @@ protected:
    void handlePIXLD(Instruction *);
 
    void checkPredicate(Instruction *);
+   Value *loadSuInfo32(Value *ptr, int slot, uint32_t off, bool bindless);
 
    virtual bool visit(Instruction *);
 
@@ -131,7 +161,6 @@ private:
    Value *loadResInfo32(Value *ptr, uint32_t off, uint16_t base);
    Value *loadResInfo64(Value *ptr, uint32_t off, uint16_t base);
    Value *loadResLength32(Value *ptr, uint32_t off, uint16_t base);
-   Value *loadSuInfo32(Value *ptr, int slot, uint32_t off, bool bindless);
    Value *loadBufInfo64(Value *ptr, uint32_t off);
    Value *loadBufLength32(Value *ptr, uint32_t off);
    Value *loadUboInfo64(Value *ptr, uint32_t off);
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_resource.h b/src/gallium/drivers/nouveau/nv50/nv50_resource.h
index 5d03925b0d0..c64b045364f 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_resource.h
+++ b/src/gallium/drivers/nouveau/nv50/nv50_resource.h
@@ -66,6 +66,7 @@ nv50_miptree(struct pipe_resource *pt)
 #define NV50_TEXVIEW_SCALED_COORDS     (1 << 0)
 #define NV50_TEXVIEW_FILTER_MSAA8      (1 << 1)
 #define NV50_TEXVIEW_ACCESS_RESOLVE    (1 << 2)
+#define NV50_TEXVIEW_IMAGE_GM107       (1 << 3)
 
 
 /* Internal functions:
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index a217f9e1665..37e10dcd07f 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -85,13 +85,6 @@ nvc0_screen_is_format_supported(struct pipe_screen *pscreen,
                  PIPE_BIND_SHARED);
 
    if (bindings & PIPE_BIND_SHADER_IMAGE) {
-      if (sample_count > 0 &&
-          nouveau_screen(pscreen)->class_3d >= GM107_3D_CLASS) {
-         /* MS images are currently unsupported on Maxwell because they have to
-          * be handled explicitly. */
-         return false;
-      }
-
       if (format == PIPE_FORMAT_B8G8R8A8_UNORM &&
           nouveau_screen(pscreen)->class_3d < NVE4_3D_CLASS) {
          /* This should work on Fermi, but for currently unknown reasons it
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c b/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
index e7cd60169e9..f40600e48aa 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_tex.c
@@ -208,7 +208,7 @@ gm107_create_texture_view(struct pipe_context *pipe,
              GM107_TIC2_3_LOD_ANISO_QUALITY_HIGH |
              GM107_TIC2_3_LOD_ISO_QUALITY_HIGH;
 
-   if (flags & NV50_TEXVIEW_ACCESS_RESOLVE) {
+   if (flags & (NV50_TEXVIEW_ACCESS_RESOLVE | NV50_TEXVIEW_IMAGE_GM107)) {
       width = mt->base.base.width0 << mt->ms_x;
       height = mt->base.base.height0 << mt->ms_y;
    } else {
@@ -268,7 +268,7 @@ gm107_create_texture_view_from_image(struct pipe_context *pipe,
       templ.u.tex.first_level = templ.u.tex.last_level = view->u.tex.level;
    }
 
-   flags = NV50_TEXVIEW_SCALED_COORDS;
+   flags = NV50_TEXVIEW_SCALED_COORDS | NV50_TEXVIEW_IMAGE_GM107;
 
    return nvc0_create_texture_view(pipe, &res->base, &templ, flags, target);
 }