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/* arch/arm/mach-msm/smem_debug.c
*
* Copyright (C) 2007 Google, Inc.
* Copyright (c) 2009-2013,2016 The Linux Foundation. All rights reserved.
* Author: Brian Swetland <swetland@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <linux/jiffies.h>
#include <soc/qcom/smem.h>
#include "smem_private.h"
#if defined(CONFIG_DEBUG_FS)
#define SZ_SMEM_ALLOCATION_TABLE 8192
static void debug_read_mem(struct seq_file *s)
{
unsigned n;
struct smem_heap_info *heap_info;
struct smem_heap_entry *toc;
heap_info = smem_find(SMEM_HEAP_INFO, sizeof(struct smem_heap_info),
0,
SMEM_ANY_HOST_FLAG);
if (!heap_info) {
seq_puts(s, "SMEM_HEAP_INFO is NULL\n");
return;
}
toc = smem_find(SMEM_ALLOCATION_TABLE, SZ_SMEM_ALLOCATION_TABLE,
0, SMEM_ANY_HOST_FLAG);
if (!toc) {
seq_puts(s, "SMEM_ALLOCATION_TABLE is NULL\n");
return;
}
seq_printf(s, "heap: init=%d free=%d remain=%d\n",
heap_info->initialized,
heap_info->free_offset,
heap_info->heap_remaining);
for (n = 0; n < smem_max_items; n++) {
if (toc[n].allocated == 0)
continue;
seq_printf(s, "%04d: offset %08x size %08x\n",
n, toc[n].offset, toc[n].size);
}
}
static void debug_read_smem_version(struct seq_file *s)
{
uint32_t n, version;
for (n = 0; n < 32; n++) {
version = smem_get_version(n);
seq_printf(s, "entry %d:%x smem = %d proc_comm = %d\n",
n, version, version >> 16, version & 0xffff);
}
}
static void debug_read_build_id(struct seq_file *s)
{
unsigned size;
void *data;
data = smem_get_entry(SMEM_HW_SW_BUILD_ID, &size, 0,
SMEM_ANY_HOST_FLAG);
if (!data)
return;
seq_write(s, data, size);
}
static int debugfs_show(struct seq_file *s, void *data)
{
void (*show)(struct seq_file *) = s->private;
show(s);
return 0;
}
static int debug_open(struct inode *inode, struct file *file)
{
return single_open(file, debugfs_show, inode->i_private);
}
static const struct file_operations debug_ops = {
.open = debug_open,
.release = single_release,
.read = seq_read,
.llseek = seq_lseek,
};
static void debug_create(const char *name, umode_t mode,
struct dentry *dent,
void (*show)(struct seq_file *))
{
struct dentry *file;
file = debugfs_create_file(name, mode, dent, show, &debug_ops);
if (!file)
pr_err("%s: unable to create file '%s'\n", __func__, name);
}
static int __init smem_debugfs_init(void)
{
struct dentry *dent;
dent = debugfs_create_dir("smem", 0);
if (IS_ERR(dent))
return PTR_ERR(dent);
debug_create("mem", 0444, dent, debug_read_mem);
debug_create("version", 0444, dent, debug_read_smem_version);
/* NNV: this is google only stuff */
debug_create("build", 0444, dent, debug_read_build_id);
return 0;
}
late_initcall(smem_debugfs_init);
#endif
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