From: Dave Airlie <airl...@redhat.com> While adding transfer queues to radv, I started writing some tests, the first test I wrote fell over copying a buffer larger than this limit.
Checked AMDVLK and found the correct limit. Cc: <mesa-sta...@lists.freedesktop.org> --- src/amd/common/sid.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/amd/common/sid.h b/src/amd/common/sid.h index 0671f7d3998..edb7d06afa6 100644 --- a/src/amd/common/sid.h +++ b/src/amd/common/sid.h @@ -9139,7 +9139,9 @@ #define CIK_SDMA_PACKET_SEMAPHORE 0x7 #define CIK_SDMA_PACKET_CONSTANT_FILL 0xb #define CIK_SDMA_PACKET_SRBM_WRITE 0xe -#define CIK_SDMA_COPY_MAX_SIZE 0x3fffe0 +/* There is apparently an undocumented HW "feature" that + prevents the HW from copying past 256 bytes of (1 << 22) */ +#define CIK_SDMA_COPY_MAX_SIZE 0x3fff00 enum amd_cmp_class_flags { S_NAN = 1 << 0, // Signaling NaN -- 2.17.1 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev