linux-kernel - [PATCH 7/9] habanalabs/gaudi: use memory_scrub

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Date:   Thu, 23 Jun 2022 23:42:10 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Dafna Hirschfeld <dhirschfeld@...ana.ai>
Subject: [PATCH 7/9] habanalabs/gaudi: use memory_scrub_val from debugfs

From: Dafna Hirschfeld <dhirschfeld@...ana.ai>

In the callback scrub_device_mem, use 'memory_scrub_val'
from debugfs for the scrubbing value.

Signed-off-by: Dafna Hirschfeld <dhirschfeld@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 Documentation/ABI/testing/debugfs-driver-habanalabs | 3 ++-
 drivers/misc/habanalabs/gaudi/gaudi.c               | 5 ++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/ABI/testing/debugfs-driver-habanalabs b/Documentation/ABI/testing/debugfs-driver-habanalabs
index 0f8d20fe343f..deb66944cd0c 100644
--- a/Documentation/ABI/testing/debugfs-driver-habanalabs
+++ b/Documentation/ABI/testing/debugfs-driver-habanalabs
@@ -182,7 +182,8 @@ Date:           May 2022
 KernelVersion:  5.19
 Contact:        dhirschfeld@...ana.ai
 Description:    The value to which the dram will be set to when the user
-                scrubs the dram using 'memory_scrub' debugfs file
+                scrubs the dram using 'memory_scrub' debugfs file and
+                the scrubbing value when using module param 'memory_scrub'
 
 What:           /sys/kernel/debug/habanalabs/hl<n>/mmu
 Date:           Jan 2019
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index bc5e74505d03..8cf3382fa039 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -4851,7 +4851,7 @@ static int gaudi_scrub_device_mem(struct hl_device *hdev)
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	u64 addr, size, dummy_val;
 	int rc = 0;
-	u64 val = 0;
+	u64 val = hdev->memory_scrub_val;
 
 	if (!hdev->memory_scrub)
 		return 0;
@@ -4871,7 +4871,6 @@ static int gaudi_scrub_device_mem(struct hl_device *hdev)
 	/* Scrub SRAM */
 	addr = prop->sram_user_base_address;
 	size = hdev->pldm ? 0x10000 : prop->sram_size - SRAM_USER_BASE_OFFSET;
-	val = 0x7777777777777777ull;
 
 	dev_dbg(hdev->dev, "Scrubing SRAM: 0x%09llx - 0x%09llx val: 0x%llx\n",
 			addr, addr + size, val);
@@ -4882,7 +4881,7 @@ static int gaudi_scrub_device_mem(struct hl_device *hdev)
 	}
 
 	/* Scrub HBM using all DMA channels in parallel */
-	rc = gaudi_scrub_device_dram(hdev, 0xdeadbeaf);
+	rc = gaudi_scrub_device_dram(hdev, val);
 	if (rc) {
 		dev_err(hdev->dev, "Failed to clear HBM (%d)\n", rc);
 		return rc;
-- 
2.25.1