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https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
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Merge "cnss: Add code to migrate from debugfs node to sysfs node"
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qctecmdr
Gerrit - the friendly Code Review server
commit
65fdc492da
1 changed files with 58 additions and 38 deletions
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@ -1,13 +1,12 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2012,2014-2017,2019 The Linux Foundation. All rights reserved. */
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/* Copyright (c) 2012,2014-2017,2019,2020 The Linux Foundation. All rights reserved. */
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/seq_file.h>
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#include <linux/err.h>
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#include <linux/stacktrace.h>
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#include <linux/spinlock.h>
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#include <linux/debugfs.h>
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#include <linux/sysfs.h>
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#ifdef CONFIG_WCNSS_SKB_PRE_ALLOC
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#include <linux/skbuff.h>
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#endif
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@ -19,10 +18,7 @@ static DEFINE_SPINLOCK(alloc_lock);
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#define WCNSS_MAX_STACK_TRACE 64
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#endif
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#define PRE_ALLOC_DEBUGFS_DIR "cnss-prealloc"
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#define PRE_ALLOC_DEBUGFS_FILE_OBJ "status"
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static struct dentry *debug_base;
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static struct kobject *prealloc_kobject;
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struct wcnss_prealloc {
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int occupied;
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@ -199,30 +195,38 @@ int wcnss_pre_alloc_reset(void)
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wcnss_allocs[i].occupied = 0;
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n++;
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}
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return n;
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}
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EXPORT_SYMBOL(wcnss_pre_alloc_reset);
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static int prealloc_memory_stats_show(struct seq_file *fp, void *data)
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static ssize_t status_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buffer)
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{
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int i = 0;
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int used_slots = 0, free_slots = 0;
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unsigned int tsize = 0, tused = 0, size = 0;
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int len = 0;
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char *buf;
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seq_puts(fp, "\nSlot_Size(Kb)\t\t[Used : Free]\n");
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buf = buffer;
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"\nSlot_Size(Kb)\t\t[Used : Free]\n");
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for (i = 0; i < ARRAY_SIZE(wcnss_allocs); i++) {
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tsize += wcnss_allocs[i].size;
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if (size != wcnss_allocs[i].size) {
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if (size) {
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seq_printf(fp, "[%d : %d]\n",
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used_slots, free_slots);
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"[%d : %d]\n", used_slots,
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free_slots);
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}
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size = wcnss_allocs[i].size;
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used_slots = 0;
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free_slots = 0;
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seq_printf(fp, "%d Kb\t\t\t", size / 1024);
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"%d Kb\t\t\t", size / 1024);
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}
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if (wcnss_allocs[i].occupied) {
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@ -232,31 +236,56 @@ static int prealloc_memory_stats_show(struct seq_file *fp, void *data)
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++free_slots;
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}
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}
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seq_printf(fp, "[%d : %d]\n", used_slots, free_slots);
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"[%d : %d]\n", used_slots, free_slots);
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/* Convert byte to Kb */
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if (tsize)
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tsize = tsize / 1024;
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if (tused)
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tused = tused / 1024;
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seq_printf(fp, "\nMemory Status:\nTotal Memory: %dKb\n", tsize);
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seq_printf(fp, "Used: %dKb\nFree: %dKb\n", tused, tsize - tused);
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"\nMemory Status:\nTotal Memory: %dKb\n",
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tsize);
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len += scnprintf(&buf[len], PAGE_SIZE - len,
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"Used: %dKb\nFree: %dKb\n", tused,
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tsize - tused);
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return 0;
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return len;
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}
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static int prealloc_memory_stats_open(struct inode *inode, struct file *file)
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static struct kobj_attribute status_attribute = __ATTR_RO(status);
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static int create_prealloc_status_sysfs(void)
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{
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return single_open(file, prealloc_memory_stats_show, NULL);
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int ret;
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prealloc_kobject = kobject_create_and_add("cnss-prealloc",
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kernel_kobj);
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if (!prealloc_kobject) {
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pr_err("Failed to create cnss-prealloc kernel object\n");
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return -ENOMEM;
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}
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ret = sysfs_create_file(prealloc_kobject,
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&status_attribute.attr);
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if (ret) {
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pr_err("%s: Failed to create sysfs cnss-prealloc file\n",
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__func__);
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kobject_put(prealloc_kobject);
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}
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return ret;
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}
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static const struct file_operations prealloc_memory_stats_fops = {
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.owner = THIS_MODULE,
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.open = prealloc_memory_stats_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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static void remove_prealloc_status_sysfs(void)
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{
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if (prealloc_kobject) {
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sysfs_remove_file(prealloc_kobject,
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&status_attribute.attr);
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kobject_put(prealloc_kobject);
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}
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}
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static int __init wcnss_pre_alloc_init(void)
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{
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@ -268,16 +297,7 @@ static int __init wcnss_pre_alloc_init(void)
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return ret;
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}
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debug_base = debugfs_create_dir(PRE_ALLOC_DEBUGFS_DIR, NULL);
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if (IS_ERR_OR_NULL(debug_base)) {
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pr_err("%s: Failed to create debugfs dir\n", __func__);
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} else if (IS_ERR_OR_NULL(debugfs_create_file
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(PRE_ALLOC_DEBUGFS_FILE_OBJ,
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0644, debug_base, NULL,
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&prealloc_memory_stats_fops))) {
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pr_err("%s: Failed to create debugfs file\n", __func__);
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debugfs_remove_recursive(debug_base);
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}
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create_prealloc_status_sysfs();
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return ret;
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}
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@ -285,7 +305,7 @@ static int __init wcnss_pre_alloc_init(void)
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static void __exit wcnss_pre_alloc_exit(void)
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{
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wcnss_prealloc_deinit();
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debugfs_remove_recursive(debug_base);
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remove_prealloc_status_sysfs();
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}
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module_init(wcnss_pre_alloc_init);
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