// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
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/*
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*
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* (C) COPYRIGHT 2012-2017, 2019-2021 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU license.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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#include <mali_kbase.h>
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#include <device/mali_kbase_device.h>
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#if IS_ENABLED(CONFIG_DEBUG_FS)
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/**
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* kbasep_gpu_memory_seq_show - Show callback for the @c gpu_memory debugfs file
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* @sfile: The debugfs entry
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* @data: Data associated with the entry
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*
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* This function is called to get the contents of the @c gpu_memory debugfs
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* file. This is a report of current gpu memory usage.
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*
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* Return:
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* * 0 if successfully prints data in debugfs entry file
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* * -1 if it encountered an error
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*/
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static int kbasep_gpu_memory_seq_show(struct seq_file *sfile, void *data)
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{
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struct list_head *entry;
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const struct list_head *kbdev_list;
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kbdev_list = kbase_device_get_list();
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list_for_each(entry, kbdev_list) {
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struct kbase_device *kbdev = NULL;
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struct kbase_context *kctx;
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kbdev = list_entry(entry, struct kbase_device, entry);
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/* output the total memory usage and cap for this device */
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seq_printf(sfile, "<dev> <pages>\n");
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seq_printf(sfile, "%-16s %10u\n",
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kbdev->devname,
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atomic_read(&(kbdev->memdev.used_pages)));
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mutex_lock(&kbdev->kctx_list_lock);
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seq_printf(sfile, " <kctx> <comm> <pid> <pages>\n");
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list_for_each_entry(kctx, &kbdev->kctx_list, kctx_list_link) {
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struct pid *pid_struct;
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struct task_struct *task;
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rcu_read_lock();
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pid_struct = find_get_pid(kctx->tgid);
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task = pid_task(pid_struct, PIDTYPE_PID);
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/* output the memory usage and cap for each kctx
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* opened on this device
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*/
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seq_printf(sfile, " %s-0x%pK %-20s %-10d %10u\n",
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"kctx",
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kctx,
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task ? task->comm : "[null comm]",
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kctx->tgid,
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atomic_read(&(kctx->used_pages)));
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put_pid(pid_struct);
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rcu_read_unlock();
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}
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mutex_unlock(&kbdev->kctx_list_lock);
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}
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kbase_device_put_list(kbdev_list);
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return 0;
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}
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/*
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* File operations related to debugfs entry for gpu_memory
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*/
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static int kbasep_gpu_memory_debugfs_open(struct inode *in, struct file *file)
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{
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return single_open(file, kbasep_gpu_memory_seq_show, NULL);
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}
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static const struct file_operations kbasep_gpu_memory_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = kbasep_gpu_memory_debugfs_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* Initialize debugfs entry for gpu_memory
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*/
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void kbasep_gpu_memory_debugfs_init(struct kbase_device *kbdev)
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{
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debugfs_create_file("gpu_memory", 0444,
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kbdev->mali_debugfs_directory, NULL,
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&kbasep_gpu_memory_debugfs_fops);
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}
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#else
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/*
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* Stub functions for when debugfs is disabled
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*/
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void kbasep_gpu_memory_debugfs_init(struct kbase_device *kbdev) {}
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#endif
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