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habanalabs/gaudi: scrub HBM to a specific value

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In order to enhance debuggability, we will scrub the whole HBM to
a specific value, in case HBM scrubbing is enabled. Scrubbing will be
performed after reset and after user closes the FD.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2021-07-27 10:54:22 +03:00 committed by Oded Gabbay
parent a6c849012b
commit f5137aff6d
1 changed files with 7 additions and 2 deletions
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9
drivers/misc/habanalabs/gaudi/gaudi.c
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@ -4193,6 +4193,11 @@ static int gaudi_hw_init(struct hl_device *hdev)
goto disable_msi;
}
/* Scrub both SRAM and DRAM */
rc = hdev->asic_funcs->scrub_device_mem(hdev, 0, 0);
if (rc)
return rc;
/* Perform read from the device to flush all configuration */
RREG32(mmHW_STATE);
@ -4757,8 +4762,8 @@ static int gaudi_hbm_scrubbing(struct hl_device *hdev)
"Doing HBM scrubbing for 0x%09llx - 0x%09llx\n",
cur_addr, cur_addr + chunk_size);
WREG32(mmDMA0_CORE_SRC_BASE_LO + dma_offset, 0);
WREG32(mmDMA0_CORE_SRC_BASE_HI + dma_offset, 0);
WREG32(mmDMA0_CORE_SRC_BASE_LO + dma_offset, 0xdeadbeaf);
WREG32(mmDMA0_CORE_SRC_BASE_HI + dma_offset, 0xdeadbeaf);
WREG32(mmDMA0_CORE_DST_BASE_LO + dma_offset,
lower_32_bits(cur_addr));
WREG32(mmDMA0_CORE_DST_BASE_HI + dma_offset,