// 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, 2019-2022 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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#if IS_ENABLED(CONFIG_DEBUG_FS)
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/**
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* kbasep_mem_profile_seq_show - Show callback for the @c mem_profile debugfs file.
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*
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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 mem_profile debugfs
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* file. This is a report of current memory usage and distribution in userspace.
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*
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* Return: 0 if it successfully prints data in debugfs entry file, non-zero
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* otherwise
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*/
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static int kbasep_mem_profile_seq_show(struct seq_file *sfile, void *data)
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{
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struct kbase_context *kctx = sfile->private;
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mutex_lock(&kctx->mem_profile_lock);
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seq_write(sfile, kctx->mem_profile_data, kctx->mem_profile_size);
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seq_putc(sfile, '\n');
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mutex_unlock(&kctx->mem_profile_lock);
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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 mem_profile
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*/
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static int kbasep_mem_profile_debugfs_open(struct inode *in, struct file *file)
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{
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return single_open(file, kbasep_mem_profile_seq_show, in->i_private);
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}
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static const struct file_operations kbasep_mem_profile_debugfs_fops = {
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.owner = THIS_MODULE,
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.open = kbasep_mem_profile_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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int kbasep_mem_profile_debugfs_insert(struct kbase_context *kctx, char *data,
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size_t size)
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{
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const mode_t mode = 0444;
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int err = 0;
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mutex_lock(&kctx->mem_profile_lock);
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dev_dbg(kctx->kbdev->dev, "initialised: %d",
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kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
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if (!kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED)) {
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if (IS_ERR_OR_NULL(kctx->kctx_dentry)) {
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err = -ENOMEM;
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} else if (IS_ERR_OR_NULL(debugfs_create_file("mem_profile",
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mode, kctx->kctx_dentry, kctx,
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&kbasep_mem_profile_debugfs_fops))) {
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err = -EAGAIN;
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} else {
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kbase_ctx_flag_set(kctx,
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KCTX_MEM_PROFILE_INITIALIZED);
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}
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}
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if (kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED)) {
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kfree(kctx->mem_profile_data);
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kctx->mem_profile_data = data;
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kctx->mem_profile_size = size;
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} else {
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kfree(data);
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}
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dev_dbg(kctx->kbdev->dev, "returning: %d, initialised: %d",
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err, kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
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mutex_unlock(&kctx->mem_profile_lock);
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return err;
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}
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void kbasep_mem_profile_debugfs_remove(struct kbase_context *kctx)
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{
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mutex_lock(&kctx->mem_profile_lock);
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dev_dbg(kctx->kbdev->dev, "initialised: %d",
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kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
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kfree(kctx->mem_profile_data);
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kctx->mem_profile_data = NULL;
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kctx->mem_profile_size = 0;
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mutex_unlock(&kctx->mem_profile_lock);
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}
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#else /* CONFIG_DEBUG_FS */
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int kbasep_mem_profile_debugfs_insert(struct kbase_context *kctx, char *data,
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size_t size)
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{
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kfree(data);
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return 0;
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}
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#endif /* CONFIG_DEBUG_FS */
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