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habanalabs: Read upper bits of trace buffer from RWPHI

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The trace buffer address is 40 bits wide.
The end of the buffer is set in the RWP register (lower 32 bits), and in
the RWPHI register (upper 8 bits).
Currently only the lower 32 bits are read, and this patch fixes it and
concatenates the upper 8 bits to the output address.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Tomer Tayar 2019-06-04 11:35:30 +00:00 committed by Oded Gabbay
parent e4c814aa71
commit 1f65105ffc
1 changed files with 12 additions and 2 deletions
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14
drivers/misc/habanalabs/goya/goya_coresight.c
View file

@ -425,8 +425,18 @@ static int goya_config_etr(struct hl_device *hdev,
WREG32(base_reg + 0x28, 0);
WREG32(base_reg + 0x304, 0);
if (params->output_size >= sizeof(u32))
*(u32 *) params->output = RREG32(base_reg + 0x18);
if (params->output_size >= sizeof(u64)) {
u32 rwp, rwphi;
/*
* The trace buffer address is 40 bits wide. The end of
* the buffer is set in the RWP register (lower 32
* bits), and in the RWPHI register (upper 8 bits).
*/
rwp = RREG32(base_reg + 0x18);
rwphi = RREG32(base_reg + 0x3c) & 0xff;
*(u64 *) params->output = ((u64) rwphi << 32) | rwp;
}
}
return 0;