From: Dave Airlie <[email protected]> So we reserve bits 16->19 for offload device ids, this means we can have 6 offload devices, which is plenty for now, and we can bump this further later without fear.
v2: I suck at maths, that is all. Fixed up the maths to match reality. Signed-off-by: Dave Airlie <[email protected]> --- dri2tokens.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/dri2tokens.h b/dri2tokens.h index 16c9008..9583014 100644 --- a/dri2tokens.h +++ b/dri2tokens.h @@ -45,6 +45,11 @@ #define DRI2BufferDepthStencil 9 #define DRI2BufferHiz 10 +/* keep bits 16 and above for prime IDs */ +#define DRI2DriverPrimeMask 7 /* 0 - 7 - allows for 6 devices*/ +#define DRI2DriverPrimeShift 16 +#define DRI2DriverPrimeId(x) (((x) >> DRI2DriverPrimeShift) & (DRI2DriverMask)) + #define DRI2DriverDRI 0 #define DRI2DriverVDPAU 1 -- 1.7.10.2 _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
