* Overlay on the G33 does not work anymore in the secondary ring buffer;

we now always only use the primary ring buffer.
* Removed secondary ring buffer allocation and member fields.
* Increased size of the primary ring buffer to 65536 bytes.
* The bytes per row register is computed differently for 9xx chips.
* On G33, the overlay does not need a physical address anymore, so we
  don't pass B_APERTURE_NEED_PHYSICAL to the allocation anymore for that
  device.
* intel_free_memory() accidently added the aperture base to the allocation
  and would therefore never free any memory.
* INTEL_RING_BUFFER_SIZE_MASK was shifted one bit to the right, didn't
  cause any harm with our buffer sizes, yet, though.
* With these changes, the driver runs stable on a G33 chipset (I have not
  yet tested the hardware cursor, though, it might need some work, too).
  The only known issue left is that overlay flickers a bit if its buffer
  is partially backed up by reserved and allocated memory.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23798 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/graphics/intel_extreme/intel_extreme.h

@@ -76,7 +76,6 @@ struct intel_shared_info {
 	struct lock		engine_lock;
 
 	ring_buffer		primary_ring_buffer;
-	ring_buffer		secondary_ring_buffer;
 
 	int32			overlay_channel_used;
 	bool			overlay_active;
@@ -200,7 +199,7 @@ struct intel_free_graphics_memory {
 #define RING_BUFFER_HEAD				0x4
 #define RING_BUFFER_START				0x8
 #define RING_BUFFER_CONTROL				0xc
-#define INTEL_RING_BUFFER_SIZE_MASK		0x000ff800
+#define INTEL_RING_BUFFER_SIZE_MASK		0x001ff000
 #define INTEL_RING_BUFFER_HEAD_MASK		0x001ffffc
 #define INTEL_RING_BUFFER_ENABLED		1