linux/drivers/char/ipmi/ipmi_devintf.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * ipmi_devintf.c
 *
 * Linux device interface for the IPMI message handler.
 *
 * Author: MontaVista Software, Inc.
 *         Corey Minyard <[email protected]>
 *         [email protected]
 *
 * Copyright 2002 MontaVista Software Inc.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/poll.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/ipmi.h>
#include <linux/mutex.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/compat.h>

struct ipmi_file_private
{ … };

static void file_receive_handler(struct ipmi_recv_msg *msg,
				 void                 *handler_data)
{ … }

static __poll_t ipmi_poll(struct file *file, poll_table *wait)
{ … }

static int ipmi_fasync(int fd, struct file *file, int on)
{ … }

static const struct ipmi_user_hndl ipmi_hndlrs = …;

static int ipmi_open(struct inode *inode, struct file *file)
{ … }

static int ipmi_release(struct inode *inode, struct file *file)
{ … }

static int handle_send_req(struct ipmi_user *user,
			   struct ipmi_req *req,
			   int             retries,
			   unsigned int    retry_time_ms)
{ … }

static int handle_recv(struct ipmi_file_private *priv,
			bool trunc, struct ipmi_recv *rsp,
			int (*copyout)(struct ipmi_recv *, void __user *),
			void __user *to)
{ … }

static int copyout_recv(struct ipmi_recv *rsp, void __user *to)
{ … }

static long ipmi_ioctl(struct file   *file,
		       unsigned int  cmd,
		       unsigned long data)
{ … }

#ifdef CONFIG_COMPAT
/*
 * The following code contains code for supporting 32-bit compatible
 * ioctls on 64-bit kernels.  This allows running 32-bit apps on the
 * 64-bit kernel
 */
#define COMPAT_IPMICTL_SEND_COMMAND …
#define COMPAT_IPMICTL_SEND_COMMAND_SETTIME …
#define COMPAT_IPMICTL_RECEIVE_MSG …
#define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC …

struct compat_ipmi_msg { … };

struct compat_ipmi_req { … };

struct compat_ipmi_recv { … };

struct compat_ipmi_req_settime { … };

/*
 * Define some helper functions for copying IPMI data
 */
static void get_compat_ipmi_msg(struct ipmi_msg *p64,
				struct compat_ipmi_msg *p32)
{ … }

static void get_compat_ipmi_req(struct ipmi_req *p64,
				struct compat_ipmi_req *p32)
{ … }

static void get_compat_ipmi_req_settime(struct ipmi_req_settime *p64,
		struct compat_ipmi_req_settime *p32)
{ … }

static void get_compat_ipmi_recv(struct ipmi_recv *p64,
				 struct compat_ipmi_recv *p32)
{ … }

static int copyout_recv32(struct ipmi_recv *p64, void __user *to)
{ … }

/*
 * Handle compatibility ioctls
 */
static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
			      unsigned long arg)
{ … }
#endif

static const struct file_operations ipmi_fops = …;

#define DEVICE_NAME …

static int ipmi_major;
module_param(ipmi_major, int, 0);
MODULE_PARM_DESC(…) …;

/* Keep track of the devices that are registered. */
struct ipmi_reg_list { … };
static LIST_HEAD(reg_list);
static DEFINE_MUTEX(reg_list_mutex);

static const struct class ipmi_class = …;

static void ipmi_new_smi(int if_num, struct device *device)
{ … }

static void ipmi_smi_gone(int if_num)
{ … }

static struct ipmi_smi_watcher smi_watcher = …;

static int __init init_ipmi_devintf(void)
{ … }
module_init(…) …;

static void __exit cleanup_ipmi(void)
{ … }
module_exit(cleanup_ipmi);

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;