linux-kernel - [PATCH 3/4] habanalabs: add debug messages for opening/closing context

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Date:   Thu, 24 Sep 2020 10:02:58 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai
Subject: [PATCH 3/4] habanalabs: add debug messages for opening/closing context

During debugging of error we sometimes need to know whether the error
happened when a user context was open. Add debug prints when opening and
closing user contexts.

Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
---
 drivers/misc/habanalabs/common/context.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/misc/habanalabs/common/context.c b/drivers/misc/habanalabs/common/context.c
index df8171a2226c..bd03ef074eed 100644
--- a/drivers/misc/habanalabs/common/context.c
+++ b/drivers/misc/habanalabs/common/context.c
@@ -28,6 +28,8 @@ static void hl_ctx_fini(struct hl_ctx *ctx)
 	kfree(ctx->cs_pending);
 
 	if (ctx->asid != HL_KERNEL_ASID_ID) {
+		dev_dbg(hdev->dev, "closing user context %d\n", ctx->asid);
+
 		/* The engines are stopped as there is no executing CS, but the
 		 * Coresight might be still working by accessing addresses
 		 * related to the stopped engines. Hence stop it explicitly.
@@ -41,6 +43,7 @@ static void hl_ctx_fini(struct hl_ctx *ctx)
 		hl_vm_ctx_fini(ctx);
 		hl_asid_free(hdev, ctx->asid);
 	} else {
+		dev_dbg(hdev->dev, "closing kernel context\n");
 		hl_mmu_ctx_fini(ctx);
 	}
 }
@@ -168,6 +171,8 @@ int hl_ctx_init(struct hl_device *hdev, struct hl_ctx *ctx, bool is_kernel_ctx)
 			dev_err(hdev->dev, "ctx_init failed\n");
 			goto err_cb_va_pool_fini;
 		}
+
+		dev_dbg(hdev->dev, "create user context %d\n", ctx->asid);
 	}
 
 	return 0;
-- 
2.17.1