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dri2proto: add prime protocol support. (v2.1)

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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.
v2.1: fix typo

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-01-20 10:34:58 +00:00
parent 652fe8d9dd
commit fb9e933987
1 changed files with 5 additions and 0 deletions
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5
dri2tokens.h
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@ -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) & (DRI2DriverPrimeMask))
#define DRI2DriverDRI 0
#define DRI2DriverVDPAU 1