r300g: implement MSAA compression and fast MSAA color clear

These are optimizations which make MSAA a lot faster.

The MSAA work is complete with this commit.  (except for enablement of AA
optimizations for RGBA16F, for which a patch is ready and waiting until
the kernel CS checker fix lands)

MSAA can't be made any faster as far as hw programming is concerned.

The catch is only one process and one colorbuffer can use the optimizations
at a time.  There usually is only one MSAA colorbuffer, so it shouldn't be
an issue.

Also, there is a limit on the size of MSAA colorbuffer resolution in terms
of megapixels.  If the limit is surpassed, the AA optimizations are disabled.
The limit is:
- 1 Mpix on low-end and some mid-level chipsets (1024x768 and 1280x720)
- 2 Mpix on some mid-level chipsets (1600x1200 and 1920x1080)
- 3 or 4 Mpix on high-end chipsets (2048x1536 or 2560x1600, respectively)
It corresponds to the number of raster pipes (= GB pipes) available, each pipe
can hold 1 Mpix of AA compression data.

If it's enabled, the driver prints to stdout:
  radeon: Acquired access to AA optimizations.

1 files changed, 17 insertions, 1 deletions

diff --git a/src/gallium/drivers/r300/r300_reg.h b/src/gallium/drivers/r300/r300_reg.h
index 5e1d810..8342ef5 100644
--- a/src/gallium/drivers/r300/r300_reg.h
+++ b/src/gallium/drivers/r300/r300_reg.h
@@ -2390,7 +2390,10 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
  * Program this register with a 32-bit value in ARGB8888 or ARGB2101010
  * formats, ignoring the fields.
  */
-#define RB3D_COLOR_CLEAR_VALUE                   0x4e14
+#define R300_RB3D_COLOR_CLEAR_VALUE                   0x4E14
+/* For FP16 AA. */
+#define R500_RB3D_COLOR_CLEAR_VALUE_AR                0x46C0
+#define R500_RB3D_COLOR_CLEAR_VALUE_GB                0x46C4
 
 /* gap */
 
@@ -2485,6 +2488,18 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 #	define R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT        (2 << 2)
 /* reserved */
 
+#define R300_RB3D_CMASK_OFFSET0 0x4E54
+#define R300_RB3D_CMASK_OFFSET1 0x4E58
+#define R300_RB3D_CMASK_OFFSET2 0x4E5C
+#define R300_RB3D_CMASK_OFFSET3 0x4E60
+#define R300_RB3D_CMASK_PITCH0  0x4E64
+#define R300_RB3D_CMASK_PITCH1  0x4E68
+#define R300_RB3D_CMASK_PITCH2  0x4E6C
+#define R300_RB3D_CMASK_PITCH3  0x4E70
+#define R300_RB3D_CMASK_WRINDEX 0x4E74
+#define R300_RB3D_CMASK_DWORD   0x4E78
+#define R300_RB3D_CMASK_RDINDEX 0x4E7C
+
 /* Resolve buffer destination address. The cache must be empty before changing
  * this register if the cb is in resolve mode. Unpipelined
  */
@@ -3504,6 +3519,7 @@ enum {
  * 2. CLEAR_VALUE: Value to write into HIZ RAM.
  */
 #define R300_PACKET3_3D_CLEAR_HIZ           0x00003700
+#define R300_PACKET3_3D_CLEAR_CMASK         0x00003800
 
 /* Draws a set of primitives using vertex buffers pointed by the state data.
  * At least 2 Parameters: