linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * ipmi_si_hotmod.c

 *

 * Handling for dynamically adding/removing IPMI devices through

 * a module parameter (and thus sysfs).

 */

​

#define pr_fmt(fmt) "ipmi_hotmod: " fmt

​

#include <linux/moduleparam.h>

#include <linux/ipmi.h>

#include <linux/atomic.h>

#include "ipmi_si.h"

#include "ipmi_plat_data.h"

​

static int hotmod_handler(const char *val, const struct kernel_param *kp);

​

module_param_call(hotmod, hotmod_handler, NULL, NULL, 0200);

MODULE_PARM_DESC(hotmod, "Add and remove interfaces.  See"

         " Documentation/IPMI.txt in the kernel sources for the"

         " gory details.");

​

/*

 * Parms come in as <op1>[:op2[:op3...]].  ops are:

 *   add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]

 * Options are:

 *   rsp=<regspacing>

 *   rsi=<regsize>

 *   rsh=<regshift>

 *   irq=<irq>

 *   ipmb=<ipmb addr>

 */

enum hotmod_op { HM_ADD, HM_REMOVE };

struct hotmod_vals {

    const char *name;

    const int  val;

};

​

static const struct hotmod_vals hotmod_ops[] = {

    { "add",    HM_ADD },

    { "remove", HM_REMOVE },

    { NULL }

};

​

static const struct hotmod_vals hotmod_si[] = {

    { "kcs",    SI_KCS },

    { "smic",   SI_SMIC },

    { "bt",     SI_BT },

    { NULL }

};

​

static const struct hotmod_vals hotmod_as[] = {

    { "mem",    IPMI_MEM_ADDR_SPACE },

    { "i/o",    IPMI_IO_ADDR_SPACE },

    { NULL }

};

​

static int parse_str(const struct hotmod_vals *v, unsigned int *val, char *name,

             const char **curr)

{

    char *s;

    int  i;