251 lines
5.9 KiB
C
Executable file
251 lines
5.9 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2011-2015 MediaTek Inc.
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*/
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#include <linux/types.h>
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#include <linux/module.h> /* needed by all modules */
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#include <linux/init.h> /* needed by module macros */
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#include <linux/fs.h> /* needed by file_operations* */
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#include <linux/miscdevice.h> /* needed by miscdevice* */
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#include <linux/device.h> /* needed by device_* */
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#include <linux/vmalloc.h> /* needed by kmalloc */
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#include <linux/uaccess.h> /* needed by copy_to_user */
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#include <linux/fs.h> /* needed by file_operations* */
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#include <linux/slab.h> /* needed by kmalloc */
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#include <linux/poll.h> /* needed by poll */
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/suspend.h>
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#include <linux/timer.h>
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#include <linux/notifier.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_fdt.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/atomic.h>
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#include <linux/types.h>
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#include <mt-plat/sync_write.h>
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#include "sspm_define.h"
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#include "sspm_helper.h"
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#include "sspm_ipi.h"
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#include "sspm_excep.h"
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#include "sspm_reservedmem.h"
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#include "sspm_reservedmem_define.h"
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#if SSPM_LOGGER_SUPPORT
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#include "sspm_logger.h"
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#endif
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#if SSPM_TIMESYNC_SUPPORT
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#include "sspm_timesync.h"
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#endif
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#include "sspm_sysfs.h"
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#if SSPM_PLT_SERV_SUPPORT
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struct plt_ctrl_s {
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unsigned int magic;
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unsigned int size;
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unsigned int mem_sz;
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#if SSPM_LOGGER_SUPPORT
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unsigned int logger_ofs;
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#endif
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#if SSPM_COREDUMP_SUPPORT
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unsigned int coredump_ofs;
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#endif
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#if SSPM_TIMESYNC_SUPPORT
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unsigned int ts_ofs;
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#endif
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};
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#if (SSPM_COREDUMP_SUPPORT || SSPM_LASTK_SUPPORT)
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/* dont send any IPI from this thread, use workqueue instead */
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static int sspm_recv_thread(void *userdata)
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{
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struct plt_ipi_data_s data;
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struct ipi_action dev;
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unsigned int rdata, ret;
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dev.data = &data;
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ret = sspm_ipi_recv_registration(IPI_ID_PLATFORM, &dev);
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do {
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rdata = 0;
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sspm_ipi_recv_wait(IPI_ID_PLATFORM);
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switch (data.cmd) {
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#if SSPM_LASTK_SUPPORT
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case PLT_LASTK_READY:
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sspm_log_lastk_recv(data.u.logger.enable);
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break;
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#endif
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#if SSPM_COREDUMP_SUPPORT
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case PLT_COREDUMP_READY:
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sspm_log_coredump_recv(data.u.coredump.exists);
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break;
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#endif
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}
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sspm_ipi_send_ack(IPI_ID_PLATFORM, &rdata);
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} while (!kthread_should_stop());
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return 0;
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}
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#endif
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static ssize_t sspm_alive_show(struct device *kobj,
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struct device_attribute *attr, char *buf)
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{
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struct plt_ipi_data_s ipi_data;
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int ackdata = 0;
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ipi_data.cmd = 0xDEAD;
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sspm_ipi_send_sync(IPI_ID_PLATFORM, IPI_OPT_WAIT,
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&ipi_data, sizeof(ipi_data) / SSPM_MBOX_SLOT_SIZE, &ackdata, 1);
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return snprintf(buf, PAGE_SIZE, "%s\n", ackdata ? "Alive" : "Dead");
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}
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DEVICE_ATTR(sspm_alive, 0444, sspm_alive_show, NULL);
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int __init sspm_plt_init(void)
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{
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phys_addr_t phys_addr, virt_addr, mem_sz;
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struct plt_ipi_data_s ipi_data;
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struct plt_ctrl_s *plt_ctl;
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#if (SSPM_COREDUMP_SUPPORT || SSPM_LASTK_SUPPORT)
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struct task_struct *sspm_task;
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#endif
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int ret, ackdata;
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unsigned int last_ofs;
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#if (SSPM_COREDUMP_SUPPORT || SSPM_LOGGER_SUPPORT || SSPM_TIMESYNC_SUPPORT)
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unsigned int last_sz;
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#endif
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unsigned int *mark;
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unsigned char *b;
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ret = sspm_sysfs_create_file(&dev_attr_sspm_alive);
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if (unlikely(ret != 0))
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goto error;
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phys_addr = sspm_reserve_mem_get_phys(SSPM_MEM_ID);
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if (phys_addr == 0) {
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pr_err("SSPM: Can't get logger phys mem\n");
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goto error;
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}
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virt_addr = sspm_reserve_mem_get_virt(SSPM_MEM_ID);
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if (virt_addr == 0) {
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pr_err("SSPM: Can't get logger virt mem\n");
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goto error;
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}
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mem_sz = sspm_reserve_mem_get_size(SSPM_MEM_ID);
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if (mem_sz == 0) {
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pr_err("SSPM: Can't get logger mem size\n");
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goto error;
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}
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#if (SSPM_COREDUMP_SUPPORT || SSPM_LASTK_SUPPORT)
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sspm_task = kthread_run(sspm_recv_thread, NULL, "sspm_recv");
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#endif
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b = (unsigned char *) (uintptr_t)virt_addr;
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for (last_ofs = 0; last_ofs < sizeof(*plt_ctl); last_ofs++)
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b[last_ofs] = 0x0;
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mark = (unsigned int *) (uintptr_t)virt_addr;
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*mark = PLT_INIT;
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mark = (unsigned int *) ((unsigned char *) (uintptr_t)
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virt_addr + mem_sz - 4);
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*mark = PLT_INIT;
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plt_ctl = (struct plt_ctrl_s *) (uintptr_t)virt_addr;
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plt_ctl->magic = PLT_INIT;
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plt_ctl->size = sizeof(*plt_ctl);
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plt_ctl->mem_sz = mem_sz;
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last_ofs = plt_ctl->size;
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pr_debug("SSPM: %s(): after plt, ofs=%u\n", __func__, last_ofs);
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#if SSPM_LOGGER_SUPPORT
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plt_ctl->logger_ofs = last_ofs;
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last_sz = sspm_logger_init(virt_addr + last_ofs, mem_sz - last_ofs);
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if (last_sz == 0) {
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pr_err("SSPM: sspm_logger_init return fail\n");
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goto error;
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}
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last_ofs += last_sz;
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pr_debug("SSPM: %s(): after logger, ofs=%u\n", __func__, last_ofs);
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#endif
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#if SSPM_COREDUMP_SUPPORT
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plt_ctl->coredump_ofs = last_ofs;
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last_sz = sspm_coredump_init(virt_addr + last_ofs, mem_sz - last_ofs);
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if (last_sz == 0) {
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pr_err("SSPM: sspm_coredump_init return fail\n");
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goto error;
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}
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last_ofs += last_sz;
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pr_debug("SSPM: %s(): after coredump, ofs=%u\n", __func__, last_ofs);
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#endif
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#if SSPM_TIMESYNC_SUPPORT
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plt_ctl->ts_ofs = last_ofs;
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last_sz = sspm_timesync_init(virt_addr + last_ofs, mem_sz - last_ofs);
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if (last_sz == 0) {
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pr_err("SSPM: sspm_timesync_init return fail\n");
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goto error;
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}
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last_ofs += last_sz;
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pr_debug("SSPM: %s(): after timesync, ofs=%u\n", __func__, last_ofs);
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#endif
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ipi_data.cmd = PLT_INIT;
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ipi_data.u.ctrl.phys = phys_addr;
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ipi_data.u.ctrl.size = mem_sz;
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ret = sspm_ipi_send_sync(IPI_ID_PLATFORM, IPI_OPT_POLLING, &ipi_data,
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sizeof(ipi_data) / SSPM_MBOX_SLOT_SIZE, &ackdata, 1);
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if (ret != 0) {
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pr_err("SSPM: logger IPI fail ret=%d\n", ret);
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goto error;
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}
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if (!ackdata) {
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pr_err("SSPM: logger IPI init fail, ret=%d\n", ackdata);
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goto error;
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}
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#if SSPM_TIMESYNC_SUPPORT
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sspm_timesync_init_done();
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#endif
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#if SSPM_COREDUMP_SUPPORT
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sspm_coredump_init_done();
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#endif
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#if SSPM_LOGGER_SUPPORT
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sspm_logger_init_done();
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#endif
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return 0;
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error:
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return -1;
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}
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#endif
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