1 files changed, 113 insertions, 0 deletions
diff --git a/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/mali_kbase_as_fault_debugfs.c b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/mali_kbase_as_fault_debugfs.c
new file mode 100644
index 0000000..2e2e394
--- /dev/null
+++ b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/mali_kbase_as_fault_debugfs.c
@@ -0,0 +1,113 @@
+/*
+ *
+ * (C) COPYRIGHT 2016-2019 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you can access it online at
+ * http://www.gnu.org/licenses/gpl-2.0.html.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ */
+
+#include <linux/debugfs.h>
+
+#include <mali_kbase.h>
+#include <mali_kbase_as_fault_debugfs.h>
+#include <device/mali_kbase_device.h>
+
+#ifdef CONFIG_DEBUG_FS
+#ifdef CONFIG_MALI_DEBUG
+
+static int kbase_as_fault_read(struct seq_file *sfile, void *data)
+{
+	uintptr_t as_no = (uintptr_t) sfile->private;
+
+	struct list_head *entry;
+	const struct list_head *kbdev_list;
+	struct kbase_device *kbdev = NULL;
+
+	kbdev_list = kbase_device_get_list();
+
+	list_for_each(entry, kbdev_list) {
+		kbdev = list_entry(entry, struct kbase_device, entry);
+
+		if (kbdev->debugfs_as_read_bitmap & (1ULL << as_no)) {
+
+			/* don't show this one again until another fault occors */
+			kbdev->debugfs_as_read_bitmap &= ~(1ULL << as_no);
+
+			/* output the last page fault addr */
+			seq_printf(sfile, "%llu\n",
+				   (u64) kbdev->as[as_no].pf_data.addr);
+		}
+
+	}
+
+	kbase_device_put_list(kbdev_list);
+
+	return 0;
+}
+
+static int kbase_as_fault_debugfs_open(struct inode *in, struct file *file)
+{
+	return single_open(file, kbase_as_fault_read, in->i_private);
+}
+
+static const struct file_operations as_fault_fops = {
+	.owner = THIS_MODULE,
+	.open = kbase_as_fault_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+#endif /* CONFIG_MALI_DEBUG */
+#endif /* CONFIG_DEBUG_FS */
+
+/*
+ *  Initialize debugfs entry for each address space
+ */
+void kbase_as_fault_debugfs_init(struct kbase_device *kbdev)
+{
+#ifdef CONFIG_DEBUG_FS
+#ifdef CONFIG_MALI_DEBUG
+	uint i;
+	char as_name[64];
+	struct dentry *debugfs_directory;
+
+	kbdev->debugfs_as_read_bitmap = 0ULL;
+
+	KBASE_DEBUG_ASSERT(kbdev->nr_hw_address_spaces);
+	KBASE_DEBUG_ASSERT(sizeof(kbdev->as[0].pf_data.addr) == sizeof(u64));
+
+	debugfs_directory = debugfs_create_dir("address_spaces",
+					       kbdev->mali_debugfs_directory);
+
+	if (debugfs_directory) {
+		for (i = 0; i < kbdev->nr_hw_address_spaces; i++) {
+			snprintf(as_name, ARRAY_SIZE(as_name), "as%u", i);
+			debugfs_create_file(as_name, S_IRUGO,
+					    debugfs_directory,
+					    (void *)(uintptr_t)i,
+					    &as_fault_fops);
+		}
+	} else {
+		dev_warn(kbdev->dev,
+			 "unable to create address_spaces debugfs directory");
+	}
+
+#endif /* CONFIG_MALI_DEBUG */
+#endif /* CONFIG_DEBUG_FS */
+	return;
+}