linux-kernel - [PATCH v4 2/2] drm/xe: Remove devcoredump during driver release

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Date: Tue,  9 Apr 2024 13:02:06 -0700
From: José Roberto de Souza <jose.souza@...el.com>
To: linux-kernel@...r.kernel.org,
	intel-xe@...ts.freedesktop.org
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Jonathan Cavitt <jonathan.cavitt@...el.com>,
	José Roberto de Souza <jose.souza@...el.com>
Subject: [PATCH v4 2/2] drm/xe: Remove devcoredump during driver release

This will remove devcoredump from file system and free its resources
during driver unload.

This fix the driver unload after gpu hang happened, otherwise this
it would report that Xe KMD is still in use and it would leave the
kernel in a state that Xe KMD can't be unload without a reboot.

Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Jonathan Cavitt <jonathan.cavitt@...el.com>
Acked-by: Jonathan Cavitt <jonathan.cavitt@...el.com>
Signed-off-by: José Roberto de Souza <jose.souza@...el.com>
---
 drivers/gpu/drm/xe/xe_devcoredump.c | 13 ++++++++++++-
 drivers/gpu/drm/xe/xe_devcoredump.h |  6 ++++++
 drivers/gpu/drm/xe/xe_device.c      |  4 ++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_devcoredump.c b/drivers/gpu/drm/xe/xe_devcoredump.c
index 283ca7518aff2..3d7980232be1c 100644
--- a/drivers/gpu/drm/xe/xe_devcoredump.c
+++ b/drivers/gpu/drm/xe/xe_devcoredump.c
@@ -9,6 +9,8 @@
 #include <linux/devcoredump.h>
 #include <generated/utsrelease.h>
 
+#include <drm/drm_managed.h>
+
 #include "xe_device.h"
 #include "xe_exec_queue.h"
 #include "xe_force_wake.h"
@@ -235,5 +237,14 @@ void xe_devcoredump(struct xe_sched_job *job)
 	dev_coredumpm(xe->drm.dev, THIS_MODULE, coredump, 0, GFP_KERNEL,
 		      xe_devcoredump_read, xe_devcoredump_free);
 }
-#endif
 
+static void xe_driver_devcoredump_fini(struct drm_device *drm, void *arg)
+{
+	dev_coredump_put(drm->dev);
+}
+
+int xe_devcoredump_init(struct xe_device *xe)
+{
+	return drmm_add_action_or_reset(&xe->drm, xe_driver_devcoredump_fini, xe);
+}
+#endif
diff --git a/drivers/gpu/drm/xe/xe_devcoredump.h b/drivers/gpu/drm/xe/xe_devcoredump.h
index df8671f0b5eb2..e2fa65ce09322 100644
--- a/drivers/gpu/drm/xe/xe_devcoredump.h
+++ b/drivers/gpu/drm/xe/xe_devcoredump.h
@@ -11,10 +11,16 @@ struct xe_sched_job;
 
 #ifdef CONFIG_DEV_COREDUMP
 void xe_devcoredump(struct xe_sched_job *job);
+int xe_devcoredump_init(struct xe_device *xe);
 #else
 static inline void xe_devcoredump(struct xe_sched_job *job)
 {
 }
+
+static inline int xe_devcoredump_init(struct xe_device *xe)
+{
+	return 0;
+}
 #endif
 
 #endif
diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 9083f5e02dd9e..ce27d0d1bdb34 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -20,6 +20,7 @@
 #include "regs/xe_regs.h"
 #include "xe_bo.h"
 #include "xe_debugfs.h"
+#include "xe_devcoredump.h"
 #include "xe_dma_buf.h"
 #include "xe_drm_client.h"
 #include "xe_drv.h"
@@ -513,6 +514,9 @@ int xe_device_probe(struct xe_device *xe)
 			return err;
 	}
 
+	err = xe_devcoredump_init(xe);
+	if (err)
+		return err;
 	err = drmm_add_action_or_reset(&xe->drm, xe_driver_flr_fini, xe);
 	if (err)
 		return err;
-- 
2.44.0