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drm/amdkfd: Use volatile MTYPE in default/alternate apertures

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MTYPE_NC_NV (0) marks scalar/vector L1 cache lines as non-volatile.
Cache lines loaded through these apertures are intended to be
invalidated before (and sometimes during) a dispatch. The non-volatile
qualifier prevents these cache lines from being distinguished from
those loaded through the private aperture.

Use MTYPE_NC (1) instead on both Gfx7 and Gfx8. This allows the
compiler to use the BUFFER_WBINVL1_VOL instruction and is a precursor
to automatic per-dispatch scalar/vector L1 volatile invalidation.

Signed-off-by: Jay Cornwall <Jay.Cornwall@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Jay Cornwall 2018-05-01 17:56:03 -04:00 committed by Oded Gabbay
parent 87e6d4e077
commit 2774c63ef3
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdkfd/cik_regs.h
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@ -33,7 +33,8 @@
#define APE1_MTYPE(x) ((x) << 7)
/* valid for both DEFAULT_MTYPE and APE1_MTYPE */
#define MTYPE_CACHED 0
#define MTYPE_CACHED_NV 0
#define MTYPE_CACHED 1
#define MTYPE_NONCACHED 3
#define DEFAULT_CP_HQD_PERSISTENT_STATE (0x33U << 8)