i965: Initial Ivybridge Viewport state setup.

SF and CLIP viewport state has been combined into SF_CLIP_VIEWPORT;
SF_CLIP and CC state pointers can now be uploaded independently.

Some portions of the hardware documentation refer to separate upload
commands for SF and CLIP; these are outdated and incorrect.

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

6 files changed, 137 insertions, 4 deletions

diff --git a/src/mesa/drivers/dri/i965/Makefile b/src/mesa/drivers/dri/i965/Makefile
index c281320c274..a0a02eea9f4 100644
--- a/src/mesa/drivers/dri/i965/Makefile
+++ b/src/mesa/drivers/dri/i965/Makefile
@@ -101,6 +101,7 @@ DRIVER_SOURCES = \
 	gen7_clip_state.c \
 	gen7_sf_state.c \
 	gen7_urb.c \
+	gen7_viewport_state.c \
 	gen7_wm_state.c
 
 C_SOURCES = \
diff --git a/src/mesa/drivers/dri/i965/brw_defines.h b/src/mesa/drivers/dri/i965/brw_defines.h
index 04d5863b889..f784456e957 100644
--- a/src/mesa/drivers/dri/i965/brw_defines.h
+++ b/src/mesa/drivers/dri/i965/brw_defines.h
@@ -899,6 +899,9 @@
 # define GEN6_SF_VIEWPORT_MODIFY			(1 << 11)
 # define GEN6_CLIP_VIEWPORT_MODIFY			(1 << 10)
 
+#define _3DSTATE_VIEWPORT_STATE_POINTERS_CC	0x7823 /* GEN7+ */
+#define _3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL	0x7821 /* GEN7+ */
+
 #define _3DSTATE_SCISSOR_STATE_POINTERS		0x780f /* GEN6+ */
 
 #define _3DSTATE_VS				0x7810 /* GEN6+ */
diff --git a/src/mesa/drivers/dri/i965/brw_state.h b/src/mesa/drivers/dri/i965/brw_state.h
index ec680e4205e..21a94e7a003 100644
--- a/src/mesa/drivers/dri/i965/brw_state.h
+++ b/src/mesa/drivers/dri/i965/brw_state.h
@@ -113,10 +113,13 @@ extern const struct brw_tracked_state gen6_wm_constants;
 extern const struct brw_tracked_state gen6_wm_state;
 extern const struct brw_tracked_state gen7_blend_state_pointer;
 extern const struct brw_tracked_state gen7_cc_state_pointer;
+extern const struct brw_tracked_state gen7_cc_viewport_state_pointer;
 extern const struct brw_tracked_state gen7_clip_state;
 extern const struct brw_tracked_state gen7_depth_stencil_state_pointer;
 extern const struct brw_tracked_state gen7_ps_state;
 extern const struct brw_tracked_state gen7_sbe_state;
+extern const struct brw_tracked_state gen7_sf_clip_viewport;
+extern const struct brw_tracked_state gen7_sf_clip_viewport_state_pointer;
 extern const struct brw_tracked_state gen7_sf_state;
 extern const struct brw_tracked_state gen7_urb;
 extern const struct brw_tracked_state gen7_wm_constants;
diff --git a/src/mesa/drivers/dri/i965/brw_state_upload.c b/src/mesa/drivers/dri/i965/brw_state_upload.c
index e3fd0911029..72978676444 100644
--- a/src/mesa/drivers/dri/i965/brw_state_upload.c
+++ b/src/mesa/drivers/dri/i965/brw_state_upload.c
@@ -179,9 +179,6 @@ const struct brw_tracked_state *gen7_atoms[] =
    &brw_gs_prog,
    &brw_wm_prog,
 
-   &gen6_clip_vp,
-   &gen6_sf_vp,
-
    /* Command packets: */
    &brw_invarient_state,
 
@@ -189,7 +186,8 @@ const struct brw_tracked_state *gen7_atoms[] =
    &brw_state_base_address,
 
    &brw_cc_vp,
-   &gen6_viewport_state,	/* must do after *_vp stages */
+   &gen7_cc_viewport_state_pointer, /* must do after brw_cc_vp */
+   &gen7_sf_clip_viewport,
 
    &gen7_urb,
    &gen6_blend_state,		/* must do before cc unit */
diff --git a/src/mesa/drivers/dri/i965/brw_structs.h b/src/mesa/drivers/dri/i965/brw_structs.h
index 6132bb91abe..561758f4eaa 100644
--- a/src/mesa/drivers/dri/i965/brw_structs.h
+++ b/src/mesa/drivers/dri/i965/brw_structs.h
@@ -1155,6 +1155,28 @@ struct gen6_sf_viewport {
    GLfloat m32;
 };
 
+struct gen7_sf_clip_viewport {
+   struct {
+      GLfloat m00;
+      GLfloat m11;
+      GLfloat m22;
+      GLfloat m30;
+      GLfloat m31;
+      GLfloat m32;
+   } viewport;
+
+   GLuint pad0[2];
+
+   struct {
+      GLfloat xmin;
+      GLfloat xmax;
+      GLfloat ymin;
+      GLfloat ymax;
+   } guardband;
+
+   GLfloat pad1[4];
+};
+
 /* Documented in the subsystem/shared-functions/sampler chapter...
  */
 struct brw_surface_state
diff --git a/src/mesa/drivers/dri/i965/gen7_viewport_state.c b/src/mesa/drivers/dri/i965/gen7_viewport_state.c
new file mode 100644
index 00000000000..838ad3a3948
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/gen7_viewport_state.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright © 2011 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 "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "intel_batchbuffer.h"
+
+static void
+prepare_sf_clip_viewport(struct brw_context *brw)
+{
+   struct gl_context *ctx = &brw->intel.ctx;
+   const GLfloat depth_scale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
+   GLfloat y_scale, y_bias;
+   const GLboolean render_to_fbo = (ctx->DrawBuffer->Name != 0);
+   const GLfloat *v = ctx->Viewport._WindowMap.m;
+   struct gen7_sf_clip_viewport *vp;
+
+   vp = brw_state_batch(brw, sizeof(vp), 64, &brw->sf.vp_offset);
+   /* Also assign to clip.vp_offset in case something uses it. */
+   brw->clip.vp_offset = brw->sf.vp_offset;
+
+   /* Disable guardband clipping (see gen6_viewport_state.c for rationale). */
+   vp->guardband.xmin = -1.0;
+   vp->guardband.xmax = 1.0;
+   vp->guardband.ymin = -1.0;
+   vp->guardband.ymax = 1.0;
+
+   /* _NEW_BUFFERS */
+   if (render_to_fbo) {
+      y_scale = 1.0;
+      y_bias = 0;
+   } else {
+      y_scale = -1.0;
+      y_bias = ctx->DrawBuffer->Height;
+   }
+
+   /* _NEW_VIEWPORT */
+   vp->viewport.m00 = v[MAT_SX];
+   vp->viewport.m11 = v[MAT_SY] * y_scale;
+   vp->viewport.m22 = v[MAT_SZ] * depth_scale;
+   vp->viewport.m30 = v[MAT_TX];
+   vp->viewport.m31 = v[MAT_TY] * y_scale + y_bias;
+   vp->viewport.m32 = v[MAT_TZ] * depth_scale;
+}
+
+static void upload_sf_clip_viewport_state_pointer(struct brw_context *brw)
+{
+   struct intel_context *intel = &brw->intel;
+
+   BEGIN_BATCH(2);
+   OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2));
+   OUT_BATCH(brw->sf.vp_offset);
+   ADVANCE_BATCH();
+}
+
+const struct brw_tracked_state gen7_sf_clip_viewport = {
+   .dirty = {
+      .mesa = _NEW_VIEWPORT | _NEW_BUFFERS,
+      .brw = BRW_NEW_BATCH,
+      .cache = 0,
+   },
+   .prepare = prepare_sf_clip_viewport,
+   .emit = upload_sf_clip_viewport_state_pointer,
+};
+
+/* ----------------------------------------------------- */
+
+static void upload_cc_viewport_state_pointer(struct brw_context *brw)
+{
+   struct intel_context *intel = &brw->intel;
+
+   BEGIN_BATCH(2);
+   OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_CC << 16 | (2 - 2));
+   OUT_BATCH(brw->cc.vp_offset);
+   ADVANCE_BATCH();
+}
+
+const struct brw_tracked_state gen7_cc_viewport_state_pointer = {
+   .dirty = {
+      .mesa = 0,
+      .brw = BRW_NEW_BATCH,
+      .cache = CACHE_NEW_CC_VP
+   },
+   .emit = upload_cc_viewport_state_pointer,
+};