// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018 Rockchip Electronics Co. Ltd. */
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#include <linux/blkdev.h>
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#include <linux/blkpg.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/freezer.h>
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#include <linux/fs.h>
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#include <linux/hdreg.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/proc_fs.h>
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#include <linux/sched.h>
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#include <linux/semaphore.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/wait.h>
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#include <linux/version.h>
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#include <linux/soc/rockchip/rk_vendor_storage.h>
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#include "../soc/rockchip/flash_vendor_storage.h"
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#include "rkflash_blk.h"
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#include "rkflash_debug.h"
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#include "rk_sftl.h"
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void __printf(1, 2) sftl_printk(char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vprintk(fmt, ap);
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va_end(ap);
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}
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/* For rkflash block dev private data */
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static const struct flash_boot_ops *g_boot_ops;
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static int g_flash_type = -1;
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static struct flash_part disk_array[MAX_PART_COUNT];
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static int g_max_part_num = 4;
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#define FW_HRADER_PT_NAME ("fw_header_p")
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static struct flash_part fw_header_p;
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#define PART_READONLY 0x85
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#define PART_WRITEONLY 0x86
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#define PART_NO_ACCESS 0x87
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static unsigned long totle_read_data;
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static unsigned long totle_write_data;
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static unsigned long totle_read_count;
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static unsigned long totle_write_count;
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static char *mtd_read_temp_buffer;
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#define MTD_RW_SECTORS (512)
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#define DISABLE_WRITE _IO('V', 0)
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#define ENABLE_WRITE _IO('V', 1)
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#define DISABLE_READ _IO('V', 2)
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#define ENABLE_READ _IO('V', 3)
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static DECLARE_WAIT_QUEUE_HEAD(rkflash_thread_wait);
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static unsigned long rkflash_req_jiffies;
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static unsigned int rknand_req_do;
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/* For rkflash dev private data, including mtd dev and block dev */
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static int rkflash_dev_initialised = 0;
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static DEFINE_MUTEX(g_flash_ops_mutex);
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static int rkflash_flash_gc(void)
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{
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int ret;
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if (g_boot_ops->gc) {
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mutex_lock(&g_flash_ops_mutex);
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ret = g_boot_ops->gc();
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mutex_unlock(&g_flash_ops_mutex);
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} else {
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ret = -EPERM;
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}
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return ret;
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}
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static int rkflash_blk_discard(u32 sec, u32 n_sec)
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{
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int ret;
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if (g_boot_ops->discard) {
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mutex_lock(&g_flash_ops_mutex);
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ret = g_boot_ops->discard(sec, n_sec);
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mutex_unlock(&g_flash_ops_mutex);
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} else {
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ret = -EPERM;
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}
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return ret;
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};
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static unsigned int rk_partition_init(struct flash_part *part)
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{
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int i, part_num = 0;
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u32 desity;
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struct STRUCT_PART_INFO *g_part; /* size 2KB */
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g_part = kmalloc(sizeof(*g_part), GFP_KERNEL | GFP_DMA);
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if (!g_part)
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return 0;
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mutex_lock(&g_flash_ops_mutex);
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if (g_boot_ops->read(0, 4, g_part) == 0) {
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if (g_part->hdr.ui_fw_tag == RK_PARTITION_TAG) {
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part_num = g_part->hdr.ui_part_entry_count;
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desity = g_boot_ops->get_capacity();
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for (i = 0; i < part_num; i++) {
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memcpy(part[i].name,
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g_part->part[i].sz_name,
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32);
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part[i].offset = g_part->part[i].ui_pt_off;
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part[i].size = g_part->part[i].ui_pt_sz;
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part[i].type = 0;
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if (part[i].size == UINT_MAX)
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part[i].size = desity - part[i].offset;
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if (part[i].offset + part[i].size > desity) {
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part[i].size = desity - part[i].offset;
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break;
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}
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}
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}
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}
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mutex_unlock(&g_flash_ops_mutex);
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kfree(g_part);
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memset(&fw_header_p, 0x0, sizeof(fw_header_p));
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memcpy(fw_header_p.name, FW_HRADER_PT_NAME, strlen(FW_HRADER_PT_NAME));
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fw_header_p.offset = 0x0;
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fw_header_p.size = 0x4;
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fw_header_p.type = 0;
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return part_num;
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}
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static int rkflash_blk_proc_show(struct seq_file *m, void *v)
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{
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char *ftl_buf = kzalloc(4096, GFP_KERNEL);
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#if IS_ENABLED(CONFIG_RK_SFTL)
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int real_size = 0;
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real_size = rknand_proc_ftlread(4096, ftl_buf);
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if (real_size > 0)
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seq_printf(m, "%s", ftl_buf);
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#endif
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seq_printf(m, "Totle Read %ld KB\n", totle_read_data >> 1);
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seq_printf(m, "Totle Write %ld KB\n", totle_write_data >> 1);
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seq_printf(m, "totle_write_count %ld\n", totle_write_count);
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seq_printf(m, "totle_read_count %ld\n", totle_read_count);
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kfree(ftl_buf);
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return 0;
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}
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static int rkflash_blk_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, rkflash_blk_proc_show, PDE_DATA(inode));
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}
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static const struct file_operations rkflash_blk_proc_fops = {
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.owner = THIS_MODULE,
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.open = rkflash_blk_proc_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 int rkflash_blk_create_procfs(void)
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{
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struct proc_dir_entry *ent;
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ent = proc_create_data("rkflash", 0x664, NULL, &rkflash_blk_proc_fops,
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(void *)0);
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if (!ent)
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return -1;
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return 0;
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}
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static int rkflash_blk_xfer(struct flash_blk_dev *dev,
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unsigned long start,
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unsigned long nsector,
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char *buf,
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int cmd,
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int totle_nsec)
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{
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int ret;
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if (dev->disable_access ||
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(cmd == WRITE && dev->readonly) ||
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(cmd == READ && dev->writeonly)) {
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return -EIO;
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}
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start += dev->off_size;
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switch (cmd) {
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case READ:
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totle_read_data += nsector;
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totle_read_count++;
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mutex_lock(&g_flash_ops_mutex);
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rkflash_print_bio("rkflash r sec= %lx, n_sec= %lx\n",
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start, nsector);
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ret = g_boot_ops->read(start, nsector, buf);
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mutex_unlock(&g_flash_ops_mutex);
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if (ret)
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ret = -EIO;
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break;
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case WRITE:
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totle_write_data += nsector;
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totle_write_count++;
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mutex_lock(&g_flash_ops_mutex);
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rkflash_print_bio("rkflash w sec= %lx, n_sec= %lx\n",
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start, nsector);
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ret = g_boot_ops->write(start, nsector, buf);
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mutex_unlock(&g_flash_ops_mutex);
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if (ret)
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ret = -EIO;
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break;
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default:
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ret = -EIO;
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break;
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}
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return ret;
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}
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static int rkflash_blk_check_buffer_align(struct request *req, char **pbuf)
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{
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int nr_vec = 0;
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struct bio_vec bv;
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struct req_iterator iter;
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char *buffer;
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void *firstbuf = 0;
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char *nextbuffer = 0;
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rq_for_each_segment(bv, req, iter) {
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/* high mem return 0 and using kernel buffer */
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if (PageHighMem(bv.bv_page))
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return 0;
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buffer = page_address(bv.bv_page) + bv.bv_offset;
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if (!buffer)
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return 0;
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if (!firstbuf)
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firstbuf = buffer;
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nr_vec++;
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if (nextbuffer && nextbuffer != buffer)
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return 0;
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nextbuffer = buffer + bv.bv_len;
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}
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*pbuf = firstbuf;
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return 1;
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}
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static int rkflash_blktrans_thread(void *arg)
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{
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struct flash_blk_ops *blk_ops = arg;
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struct request_queue *rq = blk_ops->rq;
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struct request *req = NULL;
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char *buf, *page_buf;
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struct req_iterator rq_iter;
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struct bio_vec bvec;
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unsigned long long sector_index = ULLONG_MAX;
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unsigned long totle_nsect;
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int rw_flag = 0;
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spin_lock_irq(rq->queue_lock);
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while (!blk_ops->quit) {
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int res;
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struct flash_blk_dev *dev;
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DECLARE_WAITQUEUE(wait, current);
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if (!req)
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req = blk_fetch_request(rq);
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if (!req) {
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add_wait_queue(&blk_ops->thread_wq, &wait);
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set_current_state(TASK_INTERRUPTIBLE);
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spin_unlock_irq(rq->queue_lock);
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rkflash_req_jiffies = HZ / 10;
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rkflash_flash_gc();
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wait_event_timeout(blk_ops->thread_wq,
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blk_ops->quit || rknand_req_do,
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rkflash_req_jiffies);
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rknand_req_do = 0;
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spin_lock_irq(rq->queue_lock);
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remove_wait_queue(&blk_ops->thread_wq, &wait);
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continue;
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} else {
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rkflash_req_jiffies = 1 * HZ;
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}
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dev = req->rq_disk->private_data;
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totle_nsect = (req->__data_len) >> 9;
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sector_index = blk_rq_pos(req);
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buf = 0;
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res = 0;
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rw_flag = req_op(req);
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if (rw_flag == REQ_OP_DISCARD) {
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spin_unlock_irq(rq->queue_lock);
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if (rkflash_blk_discard(blk_rq_pos(req) +
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dev->off_size, totle_nsect))
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res = -EIO;
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spin_lock_irq(rq->queue_lock);
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if (!__blk_end_request_cur(req, res))
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req = NULL;
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continue;
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} else if (rw_flag == REQ_OP_FLUSH) {
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if (!__blk_end_request_cur(req, res))
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req = NULL;
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continue;
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} else if (rw_flag == REQ_OP_READ) {
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buf = mtd_read_temp_buffer;
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rkflash_blk_check_buffer_align(req, &buf);
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spin_unlock_irq(rq->queue_lock);
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res = rkflash_blk_xfer(dev,
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sector_index,
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totle_nsect,
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buf,
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rw_flag,
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totle_nsect);
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spin_lock_irq(rq->queue_lock);
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if (buf == mtd_read_temp_buffer) {
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char *p = buf;
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rq_for_each_segment(bvec, req, rq_iter) {
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page_buf = kmap_atomic(bvec.bv_page);
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memcpy(page_buf +
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bvec.bv_offset,
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p,
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bvec.bv_len);
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p += bvec.bv_len;
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kunmap_atomic(page_buf);
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}
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}
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} else if (rw_flag == REQ_OP_WRITE){
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buf = mtd_read_temp_buffer;
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rkflash_blk_check_buffer_align(req, &buf);
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if (buf == mtd_read_temp_buffer) {
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char *p = buf;
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rq_for_each_segment(bvec, req, rq_iter) {
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page_buf = kmap_atomic(bvec.bv_page);
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memcpy(p,
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page_buf +
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bvec.bv_offset,
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bvec.bv_len);
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p += bvec.bv_len;
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kunmap_atomic(page_buf);
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}
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}
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spin_unlock_irq(rq->queue_lock);
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res = rkflash_blk_xfer(dev,
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sector_index,
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totle_nsect,
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buf,
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rw_flag,
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totle_nsect);
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spin_lock_irq(rq->queue_lock);
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} else {
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pr_err("%s error req flag\n", __func__);
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}
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__blk_end_request_all(req, res);
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req = NULL;
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}
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pr_info("flash th quited\n");
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blk_ops->flash_th_quited = 1;
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if (req)
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__blk_end_request_all(req, -EIO);
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while ((req = blk_fetch_request(rq)) != NULL)
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__blk_end_request_all(req, -ENODEV);
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spin_unlock_irq(rq->queue_lock);
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complete_and_exit(&blk_ops->thread_exit, 0);
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return 0;
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}
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static void rkflash_blk_request(struct request_queue *rq)
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{
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struct flash_blk_ops *blk_ops = rq->queuedata;
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struct request *req = NULL;
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if (blk_ops->flash_th_quited) {
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while ((req = blk_fetch_request(rq)) != NULL)
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__blk_end_request_all(req, -ENODEV);
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return;
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}
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rknand_req_do = 1;
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wake_up(&blk_ops->thread_wq);
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}
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static int rkflash_blk_open(struct block_device *bdev, fmode_t mode)
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{
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return 0;
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}
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static void rkflash_blk_release(struct gendisk *disk, fmode_t mode)
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{
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};
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static int rkflash_blk_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd,
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unsigned long arg)
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{
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struct flash_blk_dev *dev = bdev->bd_disk->private_data;
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switch (cmd) {
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case ENABLE_WRITE:
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dev->disable_access = 0;
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dev->readonly = 0;
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set_disk_ro(dev->blkcore_priv, 0);
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return 0;
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case DISABLE_WRITE:
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dev->readonly = 1;
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set_disk_ro(dev->blkcore_priv, 1);
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return 0;
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case ENABLE_READ:
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dev->disable_access = 0;
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dev->writeonly = 0;
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return 0;
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case DISABLE_READ:
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dev->writeonly = 1;
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return 0;
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default:
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return -ENOTTY;
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}
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}
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const struct block_device_operations rkflash_blk_trans_ops = {
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.owner = THIS_MODULE,
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.open = rkflash_blk_open,
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.release = rkflash_blk_release,
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.ioctl = rkflash_blk_ioctl,
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};
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static struct flash_blk_ops mytr = {
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.name = "rkflash",
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.major = 31,
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.minorbits = 0,
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.owner = THIS_MODULE,
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};
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static int rkflash_blk_add_dev(struct flash_blk_ops *blk_ops,
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struct flash_part *part)
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{
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struct flash_blk_dev *dev;
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struct gendisk *gd;
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if (part->size == 0)
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return -1;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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gd = alloc_disk(1 << blk_ops->minorbits);
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if (!gd) {
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kfree(dev);
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return -ENOMEM;
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}
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dev->blk_ops = blk_ops;
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dev->size = part->size;
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dev->off_size = part->offset;
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dev->devnum = blk_ops->last_dev_index;
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list_add_tail(&dev->list, &blk_ops->devs);
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blk_ops->last_dev_index++;
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gd->major = blk_ops->major;
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gd->first_minor = (dev->devnum) << blk_ops->minorbits;
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gd->fops = &rkflash_blk_trans_ops;
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if (part->name[0]) {
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snprintf(gd->disk_name,
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sizeof(gd->disk_name),
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"%s",
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part->name);
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} else {
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gd->flags = GENHD_FL_EXT_DEVT;
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gd->minors = 255;
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snprintf(gd->disk_name,
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sizeof(gd->disk_name),
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"%s%d",
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blk_ops->name,
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dev->devnum);
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}
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set_capacity(gd, dev->size);
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gd->private_data = dev;
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dev->blkcore_priv = gd;
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gd->queue = blk_ops->rq;
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gd->queue->bypass_depth = 1;
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if (part->type == PART_NO_ACCESS)
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dev->disable_access = 1;
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if (part->type == PART_READONLY)
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dev->readonly = 1;
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if (part->type == PART_WRITEONLY)
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dev->writeonly = 1;
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if (dev->readonly)
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set_disk_ro(gd, 1);
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add_disk(gd);
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return 0;
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}
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static int rkflash_blk_remove_dev(struct flash_blk_dev *dev)
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{
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struct gendisk *gd;
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gd = dev->blkcore_priv;
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list_del(&dev->list);
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gd->queue = NULL;
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del_gendisk(gd);
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put_disk(gd);
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kfree(dev);
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return 0;
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}
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static int rkflash_blk_register(struct flash_blk_ops *blk_ops)
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{
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int i, ret;
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u64 offset;
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rknand_req_do = 0;
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blk_ops->quit = 0;
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blk_ops->flash_th_quited = 0;
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mtd_read_temp_buffer = kmalloc(MTD_RW_SECTORS * 512,
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GFP_KERNEL | GFP_DMA);
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ret = register_blkdev(blk_ops->major, blk_ops->name);
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if (ret)
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return -1;
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spin_lock_init(&blk_ops->queue_lock);
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init_completion(&blk_ops->thread_exit);
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init_waitqueue_head(&blk_ops->thread_wq);
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blk_ops->rq = blk_init_queue(rkflash_blk_request, &blk_ops->queue_lock);
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if (!blk_ops->rq) {
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unregister_blkdev(blk_ops->major, blk_ops->name);
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return -1;
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}
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blk_queue_max_hw_sectors(blk_ops->rq, MTD_RW_SECTORS);
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blk_queue_max_segments(blk_ops->rq, MTD_RW_SECTORS);
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blk_queue_flag_set(QUEUE_FLAG_DISCARD, blk_ops->rq);
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blk_queue_max_discard_sectors(blk_ops->rq, UINT_MAX >> 9);
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blk_ops->rq->queuedata = blk_ops;
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INIT_LIST_HEAD(&blk_ops->devs);
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kthread_run(rkflash_blktrans_thread, (void *)blk_ops, "rkflash");
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g_max_part_num = rk_partition_init(disk_array);
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if (g_max_part_num) {
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/* partition 0 is save vendor data, need hidden */
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blk_ops->last_dev_index = 0;
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for (i = 1; i < g_max_part_num; i++) {
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offset = (u64)disk_array[i].offset;
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pr_info("%10s: 0x%09llx -- 0x%09llx (%llu MB)\n",
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disk_array[i].name,
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offset * 512,
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(u64)(offset + disk_array[i].size) * 512,
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(u64)disk_array[i].size / 2048);
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rkflash_blk_add_dev(blk_ops, &disk_array[i]);
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}
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rkflash_blk_add_dev(blk_ops, &fw_header_p);
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} else {
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struct flash_part part;
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part.offset = 0;
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part.size = g_boot_ops->get_capacity();
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part.type = 0;
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part.name[0] = 0;
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rkflash_blk_add_dev(&mytr, &part);
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}
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rkflash_blk_create_procfs();
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return 0;
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}
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static void rkflash_blk_unregister(struct flash_blk_ops *blk_ops)
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{
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struct list_head *this, *next;
|
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blk_ops->quit = 1;
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wake_up(&blk_ops->thread_wq);
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wait_for_completion(&blk_ops->thread_exit);
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list_for_each_safe(this, next, &blk_ops->devs) {
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struct flash_blk_dev *dev =
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list_entry(this, struct flash_blk_dev, list);
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rkflash_blk_remove_dev(dev);
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}
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blk_cleanup_queue(blk_ops->rq);
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unregister_blkdev(blk_ops->major, blk_ops->name);
|
}
|
|
static int __maybe_unused rkflash_dev_vendor_read(u32 sec, u32 n_sec, void *p_data)
|
{
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int ret;
|
|
if (g_boot_ops->vendor_read) {
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mutex_lock(&g_flash_ops_mutex);
|
ret = g_boot_ops->vendor_read(sec, n_sec, p_data);
|
mutex_unlock(&g_flash_ops_mutex);
|
} else {
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ret = -EPERM;
|
}
|
|
return ret;
|
}
|
|
static int __maybe_unused rkflash_dev_vendor_write(u32 sec, u32 n_sec, void *p_data)
|
{
|
int ret;
|
|
if (g_boot_ops->vendor_write) {
|
mutex_lock(&g_flash_ops_mutex);
|
ret = g_boot_ops->vendor_write(sec,
|
n_sec,
|
p_data);
|
mutex_unlock(&g_flash_ops_mutex);
|
} else {
|
ret = -EPERM;
|
}
|
|
return ret;
|
}
|
|
int rkflash_dev_init(void __iomem *reg_addr,
|
enum flash_type type,
|
const struct flash_boot_ops *ops)
|
{
|
int ret = -1;
|
|
pr_err("%s enter\n", __func__);
|
if (rkflash_dev_initialised) {
|
pr_err("rkflash has already inited as id[%d]\n", g_flash_type);
|
return -1;
|
}
|
|
if (!ops->init)
|
return -EINVAL;
|
ret = ops->init(reg_addr);
|
if (ret) {
|
pr_err("rkflash[%d] is invalid", type);
|
|
return -ENODEV;
|
}
|
pr_info("rkflash[%d] init success\n", type);
|
g_boot_ops = ops;
|
|
/* vendor part */
|
switch (type) {
|
case FLASH_TYPE_SFC_NOR:
|
#if IS_ENABLED(CONFIG_RK_SFC_NOR_MTD) && IS_ENABLED(CONFIG_ROCKCHIP_MTD_VENDOR_STORAGE)
|
break;
|
#else
|
flash_vendor_dev_ops_register(rkflash_dev_vendor_read,
|
rkflash_dev_vendor_write);
|
#endif
|
break;
|
case FLASH_TYPE_SFC_NAND:
|
#ifdef CONFIG_RK_SFC_NAND_MTD
|
break;
|
#endif
|
case FLASH_TYPE_NANDC_NAND:
|
#if defined(CONFIG_RK_SFTL)
|
rk_sftl_vendor_dev_ops_register(rkflash_dev_vendor_read,
|
rkflash_dev_vendor_write);
|
ret = rk_sftl_vendor_storage_init();
|
if (!ret) {
|
rk_vendor_register(rk_sftl_vendor_read,
|
rk_sftl_vendor_write);
|
rk_sftl_vendor_register();
|
pr_info("rkflashd vendor storage init ok !\n");
|
} else {
|
pr_info("rkflash vendor storage init failed !\n");
|
}
|
break;
|
#endif
|
default:
|
break;
|
}
|
|
switch (type) {
|
case FLASH_TYPE_SFC_NOR:
|
#ifdef CONFIG_RK_SFC_NOR_MTD
|
ret = sfc_nor_mtd_init(sfnor_dev, &g_flash_ops_mutex);
|
pr_err("%s device register as mtd dev, ret= %d\n", __func__, ret);
|
break;
|
#endif
|
case FLASH_TYPE_SFC_NAND:
|
#ifdef CONFIG_RK_SFC_NAND_MTD
|
ret = sfc_nand_mtd_init(sfnand_dev, &g_flash_ops_mutex);
|
pr_err("%s device register as mtd dev, ret= %d\n", __func__, ret);
|
break;
|
#endif
|
case FLASH_TYPE_NANDC_NAND:
|
default:
|
g_flash_type = type;
|
mytr.quit = 1;
|
ret = rkflash_blk_register(&mytr);
|
pr_err("%s device register as blk dev, ret= %d\n", __func__, ret);
|
if (ret)
|
g_flash_type = -1;
|
break;
|
}
|
|
if (!ret)
|
rkflash_dev_initialised = 1;
|
|
return ret;
|
}
|
|
int rkflash_dev_exit(void)
|
{
|
if (rkflash_dev_initialised)
|
rkflash_dev_initialised = 0;
|
if (g_flash_type != -1)
|
rkflash_blk_unregister(&mytr);
|
pr_info("%s:OK\n", __func__);
|
|
return 0;
|
}
|
|
int rkflash_dev_suspend(void)
|
{
|
mutex_lock(&g_flash_ops_mutex);
|
|
return 0;
|
}
|
|
int rkflash_dev_resume(void __iomem *reg_addr)
|
{
|
g_boot_ops->resume(reg_addr);
|
mutex_unlock(&g_flash_ops_mutex);
|
|
return 0;
|
}
|
|
void rkflash_dev_shutdown(void)
|
{
|
pr_info("rkflash_shutdown...\n");
|
if (g_flash_type != -1 && mytr.quit == 0) {
|
mytr.quit = 1;
|
wake_up(&mytr.thread_wq);
|
wait_for_completion(&mytr.thread_exit);
|
}
|
mutex_lock(&g_flash_ops_mutex);
|
g_boot_ops->deinit();
|
mutex_unlock(&g_flash_ops_mutex);
|
pr_info("rkflash_shutdown:OK\n");
|
}
|
