^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * CMA DebugFS Interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2015 Sasha Levin <sasha.levin@oracle.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/cma.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mm_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "cma.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static size_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u32_format_array_hex(char *buf, size_t bufsize, u32 *array, int array_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) while (--array_size >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) char term = (array_size && (++i % 8)) ? ' ' : '\n';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) len = snprintf(buf, bufsize, "%08X%c", *array++, term);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) buf += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) bufsize -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int u32_array_open_hex(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct debugfs_u32_array *data = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int size, elements = data->n_elements;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * Max size:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * - 8 digits + ' '/'\n' = 9 bytes per number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * - terminating NUL character
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) size = elements * 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) buf = kmalloc(size + 1, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) buf[size] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) file->private_data = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) u32_format_array_hex(buf, size + 1, data->array, data->n_elements);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return nonseekable_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u32_array_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) size_t size = strlen(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return simple_read_from_buffer(buf, len, ppos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) file->private_data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int u32_array_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) kfree(file->private_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static const struct file_operations u32_array_hex_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .open = u32_array_open_hex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .release = u32_array_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .read = u32_array_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static void debugfs_create_u32_array_hex(const char *name, umode_t mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct dentry *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct debugfs_u32_array *array)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) debugfs_create_file_unsafe(name, mode, parent, array, &u32_array_hex_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct dentry *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) char name[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) scnprintf(name, sizeof(name), "cma-%s", cma->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) tmp = debugfs_lookup(name, root_dentry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (!tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) debugfs_create_u32_array_hex("bitmap_hex", 0444, tmp, &cma->dfs_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int __init rk_cma_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct dentry *cma_debugfs_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) cma_debugfs_root = debugfs_lookup("cma", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!cma_debugfs_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) for (i = 0; i < cma_area_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret = cma_debugfs_add_one(&cma_areas[i], cma_debugfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) late_initcall(rk_cma_debugfs_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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