From 342016010a515ccc4492924ca260d7ff76ecb1b5 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Sun, 27 Feb 2011 21:57:31 +0100
Subject: i915g: buffer validation for render state

Also contains the first few bits for hw state atoms.

v2: Implement suggestion by Jakob Bornecrantz.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 src/gallium/drivers/i915/i915_batchbuffer.h |  8 +++
 src/gallium/drivers/i915/i915_context.h     |  3 ++
 src/gallium/drivers/i915/i915_state_emit.c  | 76 +++++++++++++++++++++++++++++
 3 files changed, 87 insertions(+)

diff --git a/src/gallium/drivers/i915/i915_batchbuffer.h b/src/gallium/drivers/i915/i915_batchbuffer.h
index d92b2ccb31..b4a91dabb3 100644
--- a/src/gallium/drivers/i915/i915_batchbuffer.h
+++ b/src/gallium/drivers/i915/i915_batchbuffer.h
@@ -75,6 +75,14 @@ i915_winsys_batchbuffer_write(struct i915_winsys_batchbuffer *batch,
    batch->ptr += size;
 }
 
+static INLINE boolean
+i915_winsys_validate_buffers(struct i915_winsys_batchbuffer *batch,
+			     struct i915_winsys_buffer **buffers,
+			     int num_of_buffers)
+{
+   return batch->iws->validate_buffers(batch, buffers, num_of_buffers);
+}
+
 static INLINE int
 i915_winsys_batchbuffer_reloc(struct i915_winsys_batchbuffer *batch,
                               struct i915_winsys_buffer *buffer,
diff --git a/src/gallium/drivers/i915/i915_context.h b/src/gallium/drivers/i915/i915_context.h
index 4243dfaff8..f264b0611e 100644
--- a/src/gallium/drivers/i915/i915_context.h
+++ b/src/gallium/drivers/i915/i915_context.h
@@ -247,6 +247,9 @@ struct i915_context {
    unsigned immediate_dirty;
    unsigned dynamic_dirty;
 
+   struct i915_winsys_buffer *validation_buffers[2 + 1 + I915_TEX_UNITS];
+   int num_validation_buffers;
+
    struct util_slab_mempool transfer_pool;
 };
 
diff --git a/src/gallium/drivers/i915/i915_state_emit.c b/src/gallium/drivers/i915/i915_state_emit.c
index f7c8ed1018..610d20a0c3 100644
--- a/src/gallium/drivers/i915/i915_state_emit.c
+++ b/src/gallium/drivers/i915/i915_state_emit.c
@@ -36,7 +36,77 @@
 #include "pipe/p_defines.h"
 
 #include "util/u_math.h"
+#include "util/u_memory.h"
 
+struct i915_tracked_hw_state {
+   const char *name;
+   void (*validate)(struct i915_context *);
+   void (*emit)(struct i915_context *);
+   unsigned dirty;
+};
+
+
+static void
+validate_immediate(struct i915_context *i915)
+{
+   if (i915->immediate_dirty & (1 << I915_IMMEDIATE_S0))
+      i915->validation_buffers[i915->num_validation_buffers++] = i915->vbo;
+}
+
+static void
+validate_static(struct i915_context *i915)
+{
+   if (i915->current.cbuf_bo)
+      i915->validation_buffers[i915->num_validation_buffers++]
+         = i915->current.cbuf_bo;
+
+   if (i915->current.depth_bo)
+      i915->validation_buffers[i915->num_validation_buffers++]
+         = i915->current.depth_bo;
+}
+
+static void
+validate_map(struct i915_context *i915)
+{
+   const uint enabled = i915->current.sampler_enable_flags;
+   uint unit;
+   struct i915_texture *tex;
+
+
+   for (unit = 0; unit < I915_TEX_UNITS; unit++) {
+      if (enabled & (1 << unit)) {
+	 tex = i915_texture(i915->fragment_sampler_views[unit]->texture);
+	 i915->validation_buffers[i915->num_validation_buffers++] = tex->buffer;
+      }
+   }
+}
+
+const static struct i915_tracked_hw_state hw_atoms[] = {
+   { "immediate", validate_immediate, NULL, I915_HW_IMMEDIATE },
+   { "static", validate_static, NULL, I915_HW_STATIC },
+   { "map", validate_map, NULL, I915_HW_MAP }
+};
+
+static boolean
+i915_validate_state(struct i915_context *i915)
+{
+   int i;
+
+   i915->num_validation_buffers = 0;
+
+   for (i = 0; i < Elements(hw_atoms); i++)
+      if ((i915->hardware_dirty & hw_atoms[i].dirty) && hw_atoms[i].validate)
+	 hw_atoms[i].validate(i915);
+
+   if (i915->num_validation_buffers == 0)
+      return TRUE;
+
+   if (!i915_winsys_validate_buffers(i915->batch, i915->validation_buffers,
+				     i915->num_validation_buffers))
+      return FALSE;
+
+   return TRUE;
+}
 
 /* Push the state into the sarea and/or texture memory.
  */
@@ -68,8 +138,14 @@ i915_emit_hardware_state(struct i915_context *i915 )
    if (I915_DBG_ON(DBG_ATOMS))
       i915_dump_hardware_dirty(i915, __FUNCTION__);
 
+   if (!i915_validate_state(i915)) {
+      FLUSH_BATCH(NULL);
+      assert(i915_validate_state(i915));
+   }
+
    if(!BEGIN_BATCH(dwords, relocs)) {
       FLUSH_BATCH(NULL);
+      assert(i915_validate_state(i915));
       assert(BEGIN_BATCH(dwords, relocs));
    }
 
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