drivers/s390/char/hmcdrv_mod.c

   1 /*
   2  *    HMC Drive DVD Module
   3  *
   4  *    Copyright IBM Corp. 2013
   5  *    Author(s): Ralf Hoppe (rhoppe@de.ibm.com)
   6  */
   7
   8 #define KMSG_COMPONENT "hmcdrv"
   9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/stat.h>
  15
  16 #include "hmcdrv_ftp.h"
  17 #include "hmcdrv_dev.h"
  18 #include "hmcdrv_cache.h"
  19
  20 MODULE_LICENSE("GPL");
  21 MODULE_AUTHOR("Copyright 2013 IBM Corporation");
  22 MODULE_DESCRIPTION("HMC drive DVD access");
  23
  24 /*
  25  * module parameter 'cachesize'
  26  */
  27 static size_t hmcdrv_mod_cachesize = HMCDRV_CACHE_SIZE_DFLT;
  28 module_param_named(cachesize, hmcdrv_mod_cachesize, ulong, S_IRUGO);
  29
  30 /**
  31  * hmcdrv_mod_init() - module init function
  32  */
  33 static int __init hmcdrv_mod_init(void)
  34 {
  35         int rc = hmcdrv_ftp_probe(); /* perform w/o cache */
  36
  37         if (rc)
  38                 return rc;
  39
  40         rc = hmcdrv_cache_startup(hmcdrv_mod_cachesize);
  41
  42         if (rc)
  43                 return rc;
  44
  45         rc = hmcdrv_dev_init();
  46
  47         if (rc)
  48                 hmcdrv_cache_shutdown();
  49
  50         return rc;
  51 }
  52
  53 /**
  54  * hmcdrv_mod_exit() - module exit function
  55  */
  56 static void __exit hmcdrv_mod_exit(void)
  57 {
  58         hmcdrv_dev_exit();
  59         hmcdrv_cache_shutdown();
  60 }
  61
  62 module_init(hmcdrv_mod_init);
  63 module_exit(hmcdrv_mod_exit);