Merge "net: cnss_prealloc: add debugfs entry to check the memory status" (31ded8db) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/net/wireless/cnss_prealloc/cnss_prealloc.c

+86 −1

Original line number	Diff line number	Diff line
		@@ -11,9 +11,14 @@
		*/
		#include <linux/module.h>
		#include <linux/slab.h>
		#include <linux/seq_file.h>
		#include <linux/err.h>
		#include <linux/stacktrace.h>
		#include <linux/spinlock.h>
		#include <linux/debugfs.h>
		#ifdef CONFIG_WCNSS_SKB_PRE_ALLOC
		#include <linux/skbuff.h>
		#endif

		static DEFINE_SPINLOCK(alloc_lock);

		@@ -21,6 +26,11 @@ static DEFINE_SPINLOCK(alloc_lock);
		#define WCNSS_MAX_STACK_TRACE 64
		#endif

		#define PRE_ALLOC_DEBUGFS_DIR "cnss-prealloc"
		#define PRE_ALLOC_DEBUGFS_FILE_OBJ "status"

		static struct dentry *debug_base;

		struct wcnss_prealloc {
		int occupied;
		unsigned int size;
		@@ -228,14 +238,89 @@ int wcnss_pre_alloc_reset(void)
		}
		EXPORT_SYMBOL(wcnss_pre_alloc_reset);

		static int prealloc_memory_stats_show(struct seq_file fp, void data)
		{
		int i = 0;
		int used_slots = 0, free_slots = 0;
		unsigned int tsize = 0, tused = 0, size = 0;

		seq_puts(fp, "\nSlot_Size(Kb)\t\t[Used : Free]\n");
		for (i = 0; i < ARRAY_SIZE(wcnss_allocs); i++) {
		tsize += wcnss_allocs[i].size;
		if (size != wcnss_allocs[i].size) {
		if (size) {
		seq_printf(
		fp, "[%d : %d]\n",
		used_slots, free_slots);
		}

		size = wcnss_allocs[i].size;
		used_slots = 0;
		free_slots = 0;
		seq_printf(fp, "%d Kb\t\t\t", size / 1024);
		}

		if (wcnss_allocs[i].occupied) {
		tused += wcnss_allocs[i].size;
		++used_slots;
		} else {
		++free_slots;
		}
		}
		seq_printf(fp, "[%d : %d]\n", used_slots, free_slots);

		/* Convert byte to Kb */
		if (tsize)
		tsize = tsize / 1024;
		if (tused)
		tused = tused / 1024;
		seq_printf(fp, "\nMemory Status:\nTotal Memory: %dKb\n", tsize);
		seq_printf(fp, "Used: %dKb\nFree: %dKb\n", tused, tsize - tused);

		return 0;
		}

		static int prealloc_memory_stats_open(struct inode inode, struct file file)
		{
		return single_open(file, prealloc_memory_stats_show, NULL);
		}

		static const struct file_operations prealloc_memory_stats_fops = {
		.owner = THIS_MODULE,
		.open = prealloc_memory_stats_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static int __init wcnss_pre_alloc_init(void)
		{
		return wcnss_prealloc_init();
		int ret;

		ret = wcnss_prealloc_init();
		if (ret) {
		pr_err("%s: Failed to init the prealloc pool\n", __func__);
		return ret;
		}

		debug_base = debugfs_create_dir(PRE_ALLOC_DEBUGFS_DIR, NULL);
		if (IS_ERR_OR_NULL(debug_base)) {
		pr_err("%s: Failed to create debugfs dir\n", __func__);
		} else if (IS_ERR_OR_NULL(debugfs_create_file(
		PRE_ALLOC_DEBUGFS_FILE_OBJ,
		0644, debug_base, NULL,
		&prealloc_memory_stats_fops))) {
		pr_err("%s: Failed to create debugfs file\n", __func__);
		debugfs_remove_recursive(debug_base);
		}

		return ret;
		}

		static void __exit wcnss_pre_alloc_exit(void)
		{
		wcnss_prealloc_deinit();
		debugfs_remove_recursive(debug_base);
		}

		module_init(wcnss_pre_alloc_init);