linux-kernel - [PATCH 4/9] habanalabs/gaudi2: read F/W security indication after hard reset

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Date:   Tue,  6 Sep 2022 17:43:13 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Tomer Tayar <ttayar@...ana.ai>
Subject: [PATCH 4/9] habanalabs/gaudi2: read F/W security indication after hard reset

From: Tomer Tayar <ttayar@...ana.ai>

F/W security status might change after every reset.

Add the reading of the preboot status to the hard reset sequence, which
among others reads this security indication.

As this preboot status reading includes the waiting for the preboot to
be ready, it can be removed from the CPU init which is done in a later
stage.

Signed-off-by: Tomer Tayar <ttayar@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/device.c      | 7 +++++++
 drivers/misc/habanalabs/common/firmware_if.c | 7 -------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index a59cbbc8965f..9407b14d4b0d 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1585,6 +1585,13 @@ int hl_device_reset(struct hl_device *hdev, u32 flags)
 	 */
 	hdev->disabled = false;
 
+	/* F/W security enabled indication might be updated after hard-reset */
+	if (hard_reset) {
+		rc = hl_fw_read_preboot_status(hdev);
+		if (rc)
+			goto out_err;
+	}
+
 	rc = hdev->asic_funcs->hw_init(hdev);
 	if (rc) {
 		dev_err(hdev->dev, "failed to initialize the H/W after reset\n");
diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index cd2eb7e73be5..8bfb459a8282 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -2509,13 +2509,6 @@ static int hl_fw_dynamic_init_cpu(struct hl_device *hdev,
 	 */
 	dyn_regs = &fw_loader->dynamic_loader.comm_desc.cpu_dyn_regs;
 
-	/* if no preboot loaded indication- wait for preboot */
-	if (!(hdev->fw_loader.fw_comp_loaded & FW_TYPE_PREBOOT_CPU)) {
-		rc = hl_fw_wait_preboot_ready(hdev);
-		if (rc)
-			return -EIO;
-	}
-
 	rc = hl_fw_dynamic_send_protocol_cmd(hdev, fw_loader, COMMS_RST_STATE,
 						0, true,
 						fw_loader->cpu_timeout);
-- 
2.25.1