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// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2016-2022 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 license.
*
* 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.
*
*/
#include <linux/debugfs.h>
#include <mali_kbase.h>
#include <mali_kbase_as_fault_debugfs.h>
#include <device/mali_kbase_device.h>
#if IS_ENABLED(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)
{
#if IS_ENABLED(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 (IS_ERR_OR_NULL(debugfs_directory)) {
dev_warn(kbdev->dev,
"unable to create address_spaces debugfs directory");
} else {
for (i = 0; i < kbdev->nr_hw_address_spaces; i++) {
if (likely(scnprintf(as_name, ARRAY_SIZE(as_name), "as%u", i)))
debugfs_create_file(as_name, 0444, debugfs_directory,
(void *)(uintptr_t)i, &as_fault_fops);
}
}
#endif /* CONFIG_MALI_DEBUG */
#endif /* CONFIG_DEBUG_FS */
}
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