linux系统下mailbox的id

在 Linux 系统下，您可以使用以下命令获取邮箱的 Mailbox ID：

1. 安装 Mutt 邮件客户端，然后打开 Mutt。

2. 连接您的 Exchange 邮箱。在 Mutt 中，按下 "m" 键，输入以下命令：

set imap_user=youremail@yourdomain.com
set imap_pass=yourpassword
set ssl_force_tls=yes
set ssl_verify_host=no
set ssl_verify_dates=no
set imap_check_subscribed=yes
set folder=imap://yourdomain.com/

3. 查看 Mailbox ID。在 Mutt 中，按下 "c" 键，然后输入以下命令：

subscribe

您将看到您的邮箱中的所有文件夹和其相应的 Mailbox ID。在列表中找到您要使用的文件夹的 Mailbox ID。

注意：这种方法需要您能够访问 Exchange 邮箱并且拥有正确的登录凭证。

相关问题

linux内核与mailbox相关的代码

以下是Linux内核与mailbox相关的代码：

1. arch/arm/include/asm/mailbox.h

#ifndef __ASM_ARM_MAILBOX_H
#define __ASM_ARM_MAILBOX_H

#include <linux/types.h>

struct mbox_chan {
u32 id;
u32 irq;
void __iomem *regs;
unsigned long count;
};

#endif /* __ASM_ARM_MAILBOX_H */

2. arch/arm/kernel/mbox.c

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <asm/mailbox.h>

#define MBOX_POLL_INTERVAL_MS 5

static struct mbox_chan *mbox_chans;
static int mbox_chan_count;

static int mbox_poll(struct mbox_chan *chan)
{
int i;

for (i = 0; i < MBOX_POLL_INTERVAL_MS; i++) {
if (readl(chan->regs + MBOX_STATUS_REG) & MBOX_STATUS_EMPTY)
return 0;
msleep(1);
}

return -ETIMEDOUT;
}

static irqreturn_t mbox_interrupt(int irq, void *dev_id)
{
struct mbox_chan *chan = dev_id;

if (readl(chan->regs + MBOX_STATUS_REG) & MBOX_STATUS_EMPTY)
return IRQ_NONE;

chan->count++;
return IRQ_HANDLED;
}

static int mbox_open(struct inode *inode, struct file *filp)
{
struct mbox_chan *chan = inode->i_private;
int ret;

ret = request_irq(chan->irq, mbox_interrupt, 0, "mbox", chan);
if (ret)
return ret;

filp->private_data = chan;

return 0;
}

static int mbox_release(struct inode *inode, struct file *filp)
{
struct mbox_chan *chan = filp->private_data;

free_irq(chan->irq, chan);

return 0;
}

static ssize_t mbox_read(struct file *filp, char __user *buf, size_t count,
loff_t *f_pos)
{
struct mbox_chan *chan = filp->private_data;
u32 value;
int ret;

ret = mbox_poll(chan);
if (ret)
return ret;

value = readl(chan->regs + MBOX_READ_REG);

if (copy_to_user(buf, &value, sizeof(u32)))
return -EFAULT;

return sizeof(u32);
}

static ssize_t mbox_write(struct file *filp, const char __user *buf, size_t count,
loff_t *f_pos)
{
struct mbox_chan *chan = filp->private_data;
u32 value;

if (count != sizeof(u32))
return -EINVAL;

if (copy_from_user(&value, buf, sizeof(u32)))
return -EFAULT;

writel(value, chan->regs + MBOX_WRITE_REG);

return sizeof(u32);
}

static const struct file_operations mbox_fops = {
.owner = THIS_MODULE,
.read = mbox_read,
.write = mbox_write,
.open = mbox_open,
.release = mbox_release,
};

static int mbox_probe(struct platform_device *pdev)
{
struct mbox_chan *chans;
struct device_node *np = pdev->dev.of_node;
struct resource *res;
int i, ret;

mbox_chan_count = of_get_child_count(np);
if (!mbox_chan_count) {
dev_err(&pdev->dev, "no mailbox channels found\n");
return -ENODEV;
}

chans = devm_kzalloc(&pdev->dev, sizeof(*chans) * mbox_chan_count,
GFP_KERNEL);
if (!chans)
return -ENOMEM;

for (i = 0; i < mbox_chan_count; i++) {
struct device_node *child = of_get_next_child(np, NULL);
if (!child) {
dev_err(&pdev->dev, "failed to get child node\n");
return -ENODEV;
}

chans[i].regs = of_iomap(child, 0);
if (!chans[i].regs) {
dev_err(&pdev->dev, "failed to map mailbox registers\n");
return -ENODEV;
}

res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
if (!res) {
dev_err(&pdev->dev, "failed to get IRQ resource\n");
return -ENODEV;
}
chans[i].irq = res->start;

chans[i].id = i;

of_node_put(child);
}

ret = platform_device_register_resndata(&pdev->dev, "mbox", -1, chans,
sizeof(*chans) * mbox_chan_count);
if (ret)
dev_err(&pdev->dev, "failed to register platform device\n");

mbox_chans = chans;

return ret;
}

static int mbox_remove(struct platform_device *pdev)
{
platform_device_unregister(&pdev->dev);

kfree(mbox_chans);

return 0;
}

static const struct of_device_id mbox_of_match[] = {
{ .compatible = "arm,mbox" },
{ },
};
MODULE_DEVICE_TABLE(of, mbox_of_match);

static struct platform_driver mbox_driver = {
.driver = {
.name = "mbox",
.of_match_table = mbox_of_match,
},
.probe = mbox_probe,
.remove = mbox_remove,
};

static int __init mbox_init(void)
{
return platform_driver_register(&mbox_driver);
}
subsys_initcall(mbox_init);

static void __exit mbox_exit(void)
{
platform_driver_unregister(&mbox_driver);
}
module_exit(mbox_exit);

MODULE_AUTHOR("Linux Kernel Mailing List <linux-kernel@vger.kernel.org>");
MODULE_DESCRIPTION("Mailbox driver for ARM processors");
MODULE_LICENSE("GPL");

编写一段基于linux内核的pcie mailbox测试用例驱动

这是一个简单的基于Linux内核的PCIe Mailbox测试用例驱动，用于测试PCIe设备与主机之间的通讯。

1.包含头文件

#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

2.定义PCIe设备的Vendor ID和Device ID

#define VENDOR_ID 0x10EC
#define DEVICE_ID 0x8168

3.定义PCIe设备的寄存器偏移量

#define MAILBOX_CTRL_REG 0x00
#define MAILBOX_STATUS_REG 0x04
#define MAILBOX_DATA_REG 0x08

4.定义PCIe设备的寄存器结构

struct mailbox_regs {
u32 ctrl_reg;
u32 status_reg;
u32 data_reg;
};

5.定义设备驱动程序的数据结构

struct mailbox_dev {
struct pci_dev *pdev;
void __iomem *regs;
};

6.定义设备驱动程序的常量

#define DRIVER_NAME "mailbox_driver"

7.定义设备驱动程序的probe函数

static int mailbox_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct mailbox_dev *mdev;
int ret;

printk(KERN_INFO "Mailbox device detected\n");

mdev = kzalloc(sizeof(struct mailbox_dev), GFP_KERNEL);
if (!mdev) {
printk(KERN_ERR "Failed to allocate memory for mailbox device\n");
return -ENOMEM;
}

ret = pci_enable_device(pdev);
if (ret) {
printk(KERN_ERR "Failed to enable PCI device\n");
goto err_free;
}

ret = pci_request_regions(pdev, DRIVER_NAME);
if (ret) {
printk(KERN_ERR "Failed to request PCI regions\n");
goto err_disable;
}

mdev->pdev = pdev;
mdev->regs = pci_iomap(pdev, 0, 0);
if (!mdev->regs) {
printk(KERN_ERR "Failed to map PCI IO space\n");
goto err_release;
}

printk(KERN_INFO "Mailbox device initialized\n");

return 0;

err_release:
pci_release_regions(pdev);
err_disable:
pci_disable_device(pdev);
err_free:
kfree(mdev);

return ret;
}

8.定义设备驱动程序的remove函数

static void mailbox_remove(struct pci_dev *pdev)
{
struct mailbox_dev *mdev = pci_get_drvdata(pdev);

printk(KERN_INFO "Removing Mailbox device\n");

pci_iounmap(pdev, mdev->regs);
pci_release_regions(pdev);
pci_disable_device(pdev);
kfree(mdev);
}

9.定义设备驱动程序的PCIe设备ID和Vendor ID

static const struct pci_device_id mailbox_id_table[] = {
{ PCI_DEVICE(VENDOR_ID, DEVICE_ID), },
{ 0, }
};

MODULE_DEVICE_TABLE(pci, mailbox_id_table);

10.定义设备驱动程序的PCIe设备驱动结构

static struct pci_driver mailbox_driver = {
.name = DRIVER_NAME,
.id_table = mailbox_id_table,
.probe = mailbox_probe,
.remove = mailbox_remove,
};

11.定义驱动程序的入口函数

static int __init mailbox_init(void)
{
int ret;

ret = pci_register_driver(&mailbox_driver);
if (ret) {
printk(KERN_ERR "Failed to register Mailbox driver\n");
return ret;
}

printk(KERN_INFO "Mailbox driver registered\n");

return 0;
}

12.定义驱动程序的出口函数

static void __exit mailbox_exit(void)
{
pci_unregister_driver(&mailbox_driver);

printk(KERN_INFO "Mailbox driver unregistered\n");
}

13.将驱动程序的入口和出口函数注册到内核

module_init(mailbox_init);
module_exit(mailbox_exit);

14.在模块描述符中添加模块许可证信息和作者信息

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");

15.编译和安装模块

make
sudo insmod mailbox_driver.ko

16.测试PCIe Mailbox功能

通过读写PCIe设备的寄存器来测试PCIe Mailbox功能：

#define MAILBOX_ENABLE_BIT (1 << 0)

void mailbox_test(struct mailbox_dev *mdev)
{
struct mailbox_regs *regs = (struct mailbox_regs *)mdev->regs;

// Enable the mailbox
writel(MAILBOX_ENABLE_BIT, &regs->ctrl_reg);

// Write data to the mailbox
writel(0x12345678, &regs->data_reg);

// Wait for the mailbox to be ready
while (!(readl(&regs->status_reg) & MAILBOX_ENABLE_BIT));

// Read data from the mailbox
u32 data = readl(&regs->data_reg);
printk(KERN_INFO "Mailbox data: %08x\n", data);
}

17.卸载模块

sudo rmmod mailbox_driver