Commit f5137aff authored by Ofir Bitton's avatar Ofir Bitton Committed by Oded Gabbay
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habanalabs/gaudi: scrub HBM to a specific value 



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: default avatarOfir Bitton <obitton@habana.ai>
Reviewed-by: default avatarOded Gabbay <ogabbay@kernel.org>
Signed-off-by: default avatarOded Gabbay <ogabbay@kernel.org>
parent a6c84901

drivers/misc/habanalabs/gaudi/gaudi.c

+7 −2
Original line number Diff line number Diff line
@@ -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,