| /* |
| * |
| * (C) COPYRIGHT 2016-2017 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> |
| |
| #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_dev_list_get(); |
| |
| 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].fault_addr); |
| } |
| |
| } |
| |
| kbase_dev_list_put(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 = { |
| .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].fault_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; |
| } |