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// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2012-2017, 2019-2022 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 <mali_kbase.h>
#if IS_ENABLED(CONFIG_DEBUG_FS)
/**
* kbasep_mem_profile_seq_show - Show callback for the @c mem_profile debugfs file.
*
* @sfile: The debugfs entry
* @data: Data associated with the entry
*
* This function is called to get the contents of the @c mem_profile debugfs
* file. This is a report of current memory usage and distribution in userspace.
*
* Return: 0 if it successfully prints data in debugfs entry file, non-zero
* otherwise
*/
static int kbasep_mem_profile_seq_show(struct seq_file *sfile, void *data)
{
struct kbase_context *kctx = sfile->private;
mutex_lock(&kctx->mem_profile_lock);
seq_write(sfile, kctx->mem_profile_data, kctx->mem_profile_size);
seq_putc(sfile, '\n');
mutex_unlock(&kctx->mem_profile_lock);
return 0;
}
/*
* File operations related to debugfs entry for mem_profile
*/
static int kbasep_mem_profile_debugfs_open(struct inode *in, struct file *file)
{
return single_open(file, kbasep_mem_profile_seq_show, in->i_private);
}
static const struct file_operations kbasep_mem_profile_debugfs_fops = {
.owner = THIS_MODULE,
.open = kbasep_mem_profile_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int kbasep_mem_profile_debugfs_insert(struct kbase_context *kctx, char *data,
size_t size)
{
#if (KERNEL_VERSION(4, 7, 0) <= LINUX_VERSION_CODE)
const mode_t mode = 0444;
#else
const mode_t mode = 0400;
#endif
int err = 0;
mutex_lock(&kctx->mem_profile_lock);
dev_dbg(kctx->kbdev->dev, "initialised: %d",
kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
if (!kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED)) {
if (IS_ERR_OR_NULL(kctx->kctx_dentry)) {
err = -ENOMEM;
} else if (IS_ERR_OR_NULL(debugfs_create_file("mem_profile",
mode, kctx->kctx_dentry, kctx,
&kbasep_mem_profile_debugfs_fops))) {
err = -EAGAIN;
} else {
kbase_ctx_flag_set(kctx,
KCTX_MEM_PROFILE_INITIALIZED);
}
}
if (kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED)) {
kfree(kctx->mem_profile_data);
kctx->mem_profile_data = data;
kctx->mem_profile_size = size;
} else {
kfree(data);
}
dev_dbg(kctx->kbdev->dev, "returning: %d, initialised: %d",
err, kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
mutex_unlock(&kctx->mem_profile_lock);
return err;
}
void kbasep_mem_profile_debugfs_remove(struct kbase_context *kctx)
{
mutex_lock(&kctx->mem_profile_lock);
dev_dbg(kctx->kbdev->dev, "initialised: %d",
kbase_ctx_flag(kctx, KCTX_MEM_PROFILE_INITIALIZED));
kfree(kctx->mem_profile_data);
kctx->mem_profile_data = NULL;
kctx->mem_profile_size = 0;
mutex_unlock(&kctx->mem_profile_lock);
}
#else /* CONFIG_DEBUG_FS */
int kbasep_mem_profile_debugfs_insert(struct kbase_context *kctx, char *data,
size_t size)
{
kfree(data);
return 0;
}
#endif /* CONFIG_DEBUG_FS */
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