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habanalabs: Read upper bits of trace buffer from 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).
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>
hifive-unleashed-5.2
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
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@ -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;