无法构建和插入我的“uio_pci_generic”模块版本

Question

为了确保我理解构建UIO驱动程序的过程，我想 我会把uio_pci_generic.c的现有代码做一些更改 将它与原来的uioJ_pci_generic.c区分开来，看看我是否可以构建这个模块并将其插入到Fedora 17系统中。

这些是我对原始uio_pci_generic所做的更改以生成我的 我无法插入的测试模块uioJ_pci_generic 运行内核。请赐教（grovel，grovel，.....）

为了将我的版本与原版区分开来，我在原版中对其进行了更改：

gdev->info.name = "uio_pci_generic";

到此：

gdev->info.name = "uioJ_pci_generic";

同时更改原文：

static struct pci_driver uioJ_pci_driver = {
    .name = "uio_pci_generic",
    .id_table = NULL, /* only dynamic id's */
    .probe = probe,
    .remove = remove,
};

到：

static struct pci_driver uioJ_pci_driver = {
    .name = "uioJ_pci_generic",
    .id_table = NULL, /* only dynamic id's */
    .probe = probe,
    .remove = remove,
};

我还修改了原来的DRIVER_AUTHOR：

#define DRIVER_AUTHOR   "Michael S. Tsirkin <mst@redhat.com>"

到：

#define DRIVER_AUTHOR   "Neddy Seagoon <mst@redhat.com>"

还修改了原来的DRIVER_DESC：

#define DRIVER_DESC "Generic UIO driver for PCI 2.3 devices"

到：

#define DRIVER_DESC "Mother : Generic UIO driver (with comments)for PCI 2.3 devices"

以下是修改后的版本：

#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/uio_driver.h>

#define DRIVER_VERSION  "0.01.0"
#define DRIVER_AUTHOR   "Neddy Seagoon <mst@redhat.com>"
#define DRIVER_DESC "Mother : Generic UIO driver (with comments)for PCI           2.3 devices"

struct uio_pci_generic_dev {
    struct uio_info info;
    struct pci_dev *pdev;
};

static inline struct uio_pci_generic_dev *
to_uio_pci_generic_dev(struct uio_info *info)
{
    return container_of(info, struct uio_pci_generic_dev, info);
}

/* Interrupt handler. Read/modify/write the command register to disable
 * the interrupt. */
static irqreturn_t irqhandler(int irq, struct uio_info *info)
{
    static int count = 0;
    pr_info("In UIO handler, count=%d\n", ++count);

    struct uio_pci_generic_dev *gdev = to_uio_pci_generic_dev(info);

    if (!pci_check_and_mask_intx(gdev->pdev))
    return IRQ_NONE;


    /* UIO core will signal the user process. */
    return IRQ_HANDLED;
}

static int probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
    struct uio_pci_generic_dev *gdev;
    int err;

    err = pci_enable_device(pdev);
    if (err) {
        dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
        __func__, err);
    return err;
    }

    pr_info("probe : pci_enable_device() Success\n");

    if (!pdev->irq) {
        dev_warn(&pdev->dev, "No IRQ assigned to device: "
            "no support for interrupts?\n");
        pci_disable_device(pdev);
        return -ENODEV;
    }

    pr_info("probe : using IRQ=%d\n", pdev->irq);


    if (!pci_intx_mask_supported(pdev)) {
        err = -ENODEV;
        goto err_verify;
    }    

    gdev = kzalloc(sizeof(struct uio_pci_generic_dev), GFP_KERNEL);
    if (!gdev) {
        err = -ENOMEM;
        goto err_alloc;
    }

    gdev->info.name = "uioJ_pci_generic";
    gdev->info.version = DRIVER_VERSION;
    gdev->info.irq = pdev->irq;
    gdev->info.irq_flags = IRQF_SHARED;
    gdev->info.handler = irqhandler;
    gdev->pdev = pdev;

    err = uio_register_device(&pdev->dev, &gdev->info);
    if (err)
        goto err_register;
    pr_info("probe : uio_register_device() Success : %d\n", err);

    pci_set_drvdata(pdev, gdev);
    return 0;

    err_register:
    pr_info("probe : uio_register_device() Failed : %d\n", err);
    kfree(gdev);
    err_alloc:
    err_verify:
    pr_info("probe : pci_disable_device()\n");

    pci_disable_device(pdev);
    return err;
}

static void remove(struct pci_dev *pdev)
{
    struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);

    pr_info("remove()\n");

    uio_unregister_device(&gdev->info);
    pci_disable_device(pdev);
    kfree(gdev);
}

static struct pci_driver uioJ_pci_driver = {
    .name = "uioJ_pci_generic",
    .id_table = NULL, /* only dynamic id's */
    .probe = probe,
    .remove = remove,
};

module_pci_driver(uioJ_pci_driver);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);

以下是我构建和插入模块的步骤：

第1步：构建模块。

obj-m += uioJ_pci_generic.o

all:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

# ls -l


-rw-r--r--. 1 james james  13943 Jun 14 11:09 uioJ_pci_generic.c
-rw-r--r--. 1 james james  13943 Jun 12 23:12 uioJ_pci_generic.c~
-rw-r--r--. 1 root  root  120924 Jun 27 22:41 uioJ_pci_generic.ko
-rw-r--r--. 1 root  root     415 Jun 27 22:41 uioJ_pci_generic.mod.c
-rw-r--r--. 1 root  root   42288 Jun 27 22:41 uioJ_pci_generic.mod.o
-rw-r--r--. 1 root  root   79592 Jun 27 22:41 uioJ_pci_generic.o

请注意，驱动程序uioJ_pci_generic不可执行，权限中没有'x'（为什么???）

步骤2：将uio目录复制到uioJ_pci_generic.ko

# cp uioJ_pci_generic.ko /lib/modules/...../drivers/uio
  cp: overwrite `/lib/modules/..../drivers/uio/uioJ_pci_generic.ko'? y

# depmod -a

第3步：现在检查模块

# ls -l
total 168
-rwxr--r--. 1 root root   4792 May  7  2012 uio_aec.ko
-rwxr--r--. 1 root root   4640 May  7  2012 uio_cif.ko
-rw-r--r--. 1 root root 120924 Jun 10 13:52 uioJ_pci_generic.ko
-rwxr--r--. 1 root root  14212 May  7  2012 uio.ko
-rwxr--r--. 1 root root   4440 May  7  2012 uio_pci_generic.ko
-rwxr--r--. 1 root root   5516 May  7  2012 uio_sercos3.ko

请注意，我的uioJ_pci_generic.ko没有'x'权限，但原始版本没有。 （为什么???）

步骤4：获取uioJ_pci_generic的模块信息：

# modinfo uioJ_pci_generic

filename:       /lib/modules../kernel/drivers/uio/uioJ_pci_generic.ko
description:    Mother : Generic UIO driver (with comments)for PCI 2.3 devices
author:         Neddy Seagoon <mst@redhat.com>
license:        GPL v2
version:        0.01.0
srcversion:     7780AD87F53B831688C0CFD
depends:        
vermagic:       3.3.4-5.fc17.i686.PAE SMP mod_unload 686 
# 
# 

与原版相比：

# modinfo uio_pci_generic 
filename:       /lib/modules/3.3.4-5.fc17.i686.PAE/kernel/drivers/uio/uio_pci_generic.ko
description:    Generic UIO driver for PCI 2.3 devices
author:         Michael S. Tsirkin <mst@redhat.com>
license:        GPL v2
version:        0.01.0
srcversion:     24D140D89C561428A72FF39
depends:        uio
intree:         Y
vermagic:       3.3.4-5.fc17.i686.PAE SMP mod_unload 686 
# 

注意区别：uio_pci_generic取决于uio，uioJ_pci_generic不依赖。

步骤5：插入模块

# modprobe uio
# modprobe uio_pci_generic

then I saw this in /var/log/messages:
Jun 27 23:33:46 localhost kernel: [ 3566.198890] Generic UIO driver for  PCI 2.3 devices version: 0.01.0

then I tried to insert the uioJ_pci_generic version

# modprobe uioJ_pci_generic 
but I saw nothing further in /var/log/messages in response to this.

如果uioJ_pci_generic模块确实正确加载了字符串 “母亲：用于PCI 2.3设备的通用UIO驱动程序（带注释）”将在/ var / log / messages中打印

标准uio_pci_generic的构建方式与我的版本不同（正确）。 构建我的uioJ_pci_generic的步骤序列有什么问题？

我很难过你！ 在此先感谢您的帮助