11da177e4SLinus Torvalds /* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */ 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * aoemain.c 41da177e4SLinus Torvalds * Module initialization routines, discover timer 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds #include <linux/hdreg.h> 81da177e4SLinus Torvalds #include <linux/blkdev.h> 91da177e4SLinus Torvalds #include <linux/module.h> 101da177e4SLinus Torvalds #include "aoe.h" 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 131da177e4SLinus Torvalds MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>"); 1402edb05eSEd L. Cashin MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels"); 151da177e4SLinus Torvalds MODULE_VERSION(VERSION); 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds enum { TINIT, TRUN, TKILL }; 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds static void 201da177e4SLinus Torvalds discover_timer(ulong vp) 211da177e4SLinus Torvalds { 221da177e4SLinus Torvalds static struct timer_list t; 231da177e4SLinus Torvalds static volatile ulong die; 241da177e4SLinus Torvalds static spinlock_t lock; 251da177e4SLinus Torvalds ulong flags; 261da177e4SLinus Torvalds enum { DTIMERTICK = HZ * 60 }; /* one minute */ 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds switch (vp) { 291da177e4SLinus Torvalds case TINIT: 301da177e4SLinus Torvalds init_timer(&t); 311da177e4SLinus Torvalds spin_lock_init(&lock); 321da177e4SLinus Torvalds t.data = TRUN; 331da177e4SLinus Torvalds t.function = discover_timer; 341da177e4SLinus Torvalds die = 0; 351da177e4SLinus Torvalds case TRUN: 361da177e4SLinus Torvalds spin_lock_irqsave(&lock, flags); 371da177e4SLinus Torvalds if (!die) { 381da177e4SLinus Torvalds t.expires = jiffies + DTIMERTICK; 391da177e4SLinus Torvalds add_timer(&t); 401da177e4SLinus Torvalds } 411da177e4SLinus Torvalds spin_unlock_irqrestore(&lock, flags); 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds aoecmd_cfg(0xffff, 0xff); 441da177e4SLinus Torvalds return; 451da177e4SLinus Torvalds case TKILL: 461da177e4SLinus Torvalds spin_lock_irqsave(&lock, flags); 471da177e4SLinus Torvalds die = 1; 481da177e4SLinus Torvalds spin_unlock_irqrestore(&lock, flags); 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds del_timer_sync(&t); 511da177e4SLinus Torvalds default: 521da177e4SLinus Torvalds return; 531da177e4SLinus Torvalds } 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static void 571da177e4SLinus Torvalds aoe_exit(void) 581da177e4SLinus Torvalds { 591da177e4SLinus Torvalds discover_timer(TKILL); 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds aoenet_exit(); 621da177e4SLinus Torvalds unregister_blkdev(AOE_MAJOR, DEVICE_NAME); 631da177e4SLinus Torvalds aoechr_exit(); 641da177e4SLinus Torvalds aoedev_exit(); 651da177e4SLinus Torvalds aoeblk_exit(); /* free cache after de-allocating bufs */ 661da177e4SLinus Torvalds } 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static int __init 691da177e4SLinus Torvalds aoe_init(void) 701da177e4SLinus Torvalds { 711da177e4SLinus Torvalds int ret; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds ret = aoedev_init(); 741da177e4SLinus Torvalds if (ret) 751da177e4SLinus Torvalds return ret; 761da177e4SLinus Torvalds ret = aoechr_init(); 771da177e4SLinus Torvalds if (ret) 781da177e4SLinus Torvalds goto chr_fail; 791da177e4SLinus Torvalds ret = aoeblk_init(); 801da177e4SLinus Torvalds if (ret) 811da177e4SLinus Torvalds goto blk_fail; 821da177e4SLinus Torvalds ret = aoenet_init(); 831da177e4SLinus Torvalds if (ret) 841da177e4SLinus Torvalds goto net_fail; 851da177e4SLinus Torvalds ret = register_blkdev(AOE_MAJOR, DEVICE_NAME); 861da177e4SLinus Torvalds if (ret < 0) { 871da177e4SLinus Torvalds printk(KERN_ERR "aoe: aoeblk_init: can't register major\n"); 881da177e4SLinus Torvalds goto blkreg_fail; 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds printk(KERN_INFO 92c42b24caSEd L. Cashin "aoe: aoe_init: AoE v%s initialised.\n", 931da177e4SLinus Torvalds VERSION); 941da177e4SLinus Torvalds discover_timer(TINIT); 951da177e4SLinus Torvalds return 0; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds blkreg_fail: 981da177e4SLinus Torvalds aoenet_exit(); 991da177e4SLinus Torvalds net_fail: 1001da177e4SLinus Torvalds aoeblk_exit(); 1011da177e4SLinus Torvalds blk_fail: 1021da177e4SLinus Torvalds aoechr_exit(); 1031da177e4SLinus Torvalds chr_fail: 1041da177e4SLinus Torvalds aoedev_exit(); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds printk(KERN_INFO "aoe: aoe_init: initialisation failure.\n"); 1071da177e4SLinus Torvalds return ret; 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds module_init(aoe_init); 1111da177e4SLinus Torvalds module_exit(aoe_exit); 1121da177e4SLinus Torvalds 113