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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/gpu/drm/msm/msm_submitqueue.c
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@@ -1,23 +1,18 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* Copyright (c) 2017 The Linux Foundation. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 and
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- * only version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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3
  */
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4
 
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 #include <linux/kref.h>
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+#include <linux/uaccess.h>
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+
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 #include "msm_gpu.h"
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9
 
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 void msm_submitqueue_destroy(struct kref *kref)
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 {
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 	struct msm_gpu_submitqueue *queue = container_of(kref,
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 		struct msm_gpu_submitqueue, ref);
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+
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+	msm_file_private_put(queue->ctx);
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 	kfree(queue);
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 }
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@@ -56,8 +51,10 @@
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 	 * No lock needed in close and there won't
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 	 * be any more user ioctls coming our way
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 	 */
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-	list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node)
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+	list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node) {
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+		list_del(&entry->node);
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 		msm_submitqueue_put(entry);
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+	}
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 }
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 int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
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@@ -88,6 +85,7 @@
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 	write_lock(&ctx->queuelock);
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+	queue->ctx = msm_file_private_get(ctx);
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 	queue->id = ctx->queueid++;
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 	if (id)
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@@ -122,6 +120,47 @@
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 	return msm_submitqueue_create(drm, ctx, default_prio, 0, NULL);
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 }
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122
 
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+static int msm_submitqueue_query_faults(struct msm_gpu_submitqueue *queue,
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+		struct drm_msm_submitqueue_query *args)
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+{
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+	size_t size = min_t(size_t, args->len, sizeof(queue->faults));
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+	int ret;
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+
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+	/* If a zero length was passed in, return the data size we expect */
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+	if (!args->len) {
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+		args->len = sizeof(queue->faults);
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+		return 0;
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+	}
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+
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+	/* Set the length to the actual size of the data */
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+	args->len = size;
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+
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+	ret = copy_to_user(u64_to_user_ptr(args->data), &queue->faults, size);
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+
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+	return ret ? -EFAULT : 0;
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+}
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+
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+int msm_submitqueue_query(struct drm_device *drm, struct msm_file_private *ctx,
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+		struct drm_msm_submitqueue_query *args)
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+{
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+	struct msm_gpu_submitqueue *queue;
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+	int ret = -EINVAL;
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+
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+	if (args->pad)
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+		return -EINVAL;
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+
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+	queue = msm_submitqueue_get(ctx, args->id);
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+	if (!queue)
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+		return -ENOENT;
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+
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+	if (args->param == MSM_SUBMITQUEUE_PARAM_FAULTS)
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+		ret = msm_submitqueue_query_faults(queue, args);
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+
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+	msm_submitqueue_put(queue);
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+
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+	return ret;
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+}
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+
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 int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id)
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 {
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 	struct msm_gpu_submitqueue *entry;