linux-kernel - [PATCH 4/9] accel/habanalabs: add more info upon cpu pkt timeout

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Date: Wed, 19 Jun 2024 09:34:20 +0300
From: Ofir Bitton <obitton@...ana.ai>
To: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc: Farah Kassabri <fkassabri@...ana.ai>
Subject: [PATCH 4/9] accel/habanalabs: add more info upon cpu pkt timeout

From: Farah Kassabri <fkassabri@...ana.ai>

In order to have better debuggability upon encountering FW issues,
We are adding additional info once CPU packet timeout expires.

Signed-off-by: Farah Kassabri <fkassabri@...ana.ai>
Reviewed-by: Ofir Bitton <obitton@...ana.ai>
---
 drivers/accel/habanalabs/common/firmware_if.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/accel/habanalabs/common/firmware_if.c b/drivers/accel/habanalabs/common/firmware_if.c
index 6f0c40b12072..3cd8a1f69980 100644
--- a/drivers/accel/habanalabs/common/firmware_if.c
+++ b/drivers/accel/habanalabs/common/firmware_if.c
@@ -460,11 +460,19 @@ int hl_fw_send_cpu_message(struct hl_device *hdev, u32 hw_queue_id, u32 *msg,
 		/* If FW performed reset just before sending it a packet, we will get a timeout.
 		 * This is expected behavior, hence no need for error message.
 		 */
-		if (!hl_device_operational(hdev, NULL) && !hdev->reset_info.in_compute_reset)
+		if (!hl_device_operational(hdev, NULL) && !hdev->reset_info.in_compute_reset) {
 			dev_dbg(hdev->dev, "Device CPU packet timeout (0x%x) due to FW reset\n",
 					tmp);
-		else
-			dev_err(hdev->dev, "Device CPU packet timeout (status = 0x%x)\n", tmp);
+		} else {
+			struct hl_bd *bd = queue->kernel_address;
+
+			bd += hl_pi_2_offset(queue->pi);
+
+			dev_err(hdev->dev, "Device CPU packet timeout (status = 0x%x)\n"
+					"Pkt info: dma_addr: 0x%llx, kernel_addr: %p, len:0x%x, ctl: 0x%x, ptr:0x%llx, dram_bd:%u\n",
+					tmp, pkt_dma_addr, (void *)pkt, bd->len, bd->ctl, bd->ptr,
+					queue->dram_bd);
+		}
 		hdev->device_cpu_disabled = true;
 		goto out;
 	}
-- 
2.34.1