152e112b3SEd L. Cashin /* Copyright (c) 2007 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> 10e9bb8fb0SDavid S. Miller #include <linux/skbuff.h> 111da177e4SLinus Torvalds #include "aoe.h" 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 141da177e4SLinus Torvalds MODULE_AUTHOR("Sam Hopkins <sah@coraid.com>"); 1502edb05eSEd L. Cashin MODULE_DESCRIPTION("AoE block/char driver for 2.6.2 and newer 2.6 kernels"); 161da177e4SLinus Torvalds MODULE_VERSION(VERSION); 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds enum { TINIT, TRUN, TKILL }; 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds static void 211da177e4SLinus Torvalds discover_timer(ulong vp) 221da177e4SLinus Torvalds { 231da177e4SLinus Torvalds static struct timer_list t; 241da177e4SLinus Torvalds static volatile ulong die; 251da177e4SLinus Torvalds static spinlock_t lock; 261da177e4SLinus Torvalds ulong flags; 271da177e4SLinus Torvalds enum { DTIMERTICK = HZ * 60 }; /* one minute */ 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds switch (vp) { 301da177e4SLinus Torvalds case TINIT: 311da177e4SLinus Torvalds init_timer(&t); 321da177e4SLinus Torvalds spin_lock_init(&lock); 331da177e4SLinus Torvalds t.data = TRUN; 341da177e4SLinus Torvalds t.function = discover_timer; 351da177e4SLinus Torvalds die = 0; 361da177e4SLinus Torvalds case TRUN: 371da177e4SLinus Torvalds spin_lock_irqsave(&lock, flags); 381da177e4SLinus Torvalds if (!die) { 391da177e4SLinus Torvalds t.expires = jiffies + DTIMERTICK; 401da177e4SLinus Torvalds add_timer(&t); 411da177e4SLinus Torvalds } 421da177e4SLinus Torvalds spin_unlock_irqrestore(&lock, flags); 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds aoecmd_cfg(0xffff, 0xff); 451da177e4SLinus Torvalds return; 461da177e4SLinus Torvalds case TKILL: 471da177e4SLinus Torvalds spin_lock_irqsave(&lock, flags); 481da177e4SLinus Torvalds die = 1; 491da177e4SLinus Torvalds spin_unlock_irqrestore(&lock, flags); 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds del_timer_sync(&t); 521da177e4SLinus Torvalds default: 531da177e4SLinus Torvalds return; 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds } 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds static void 581da177e4SLinus Torvalds aoe_exit(void) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds discover_timer(TKILL); 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds aoenet_exit(); 631da177e4SLinus Torvalds unregister_blkdev(AOE_MAJOR, DEVICE_NAME); 64896831f5SEd Cashin aoecmd_exit(); 651da177e4SLinus Torvalds aoechr_exit(); 661da177e4SLinus Torvalds aoedev_exit(); 671da177e4SLinus Torvalds aoeblk_exit(); /* free cache after de-allocating bufs */ 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static int __init 711da177e4SLinus Torvalds aoe_init(void) 721da177e4SLinus Torvalds { 731da177e4SLinus Torvalds int ret; 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds ret = aoedev_init(); 761da177e4SLinus Torvalds if (ret) 771da177e4SLinus Torvalds return ret; 781da177e4SLinus Torvalds ret = aoechr_init(); 791da177e4SLinus Torvalds if (ret) 801da177e4SLinus Torvalds goto chr_fail; 811da177e4SLinus Torvalds ret = aoeblk_init(); 821da177e4SLinus Torvalds if (ret) 831da177e4SLinus Torvalds goto blk_fail; 841da177e4SLinus Torvalds ret = aoenet_init(); 851da177e4SLinus Torvalds if (ret) 861da177e4SLinus Torvalds goto net_fail; 87896831f5SEd Cashin ret = aoecmd_init(); 88896831f5SEd Cashin if (ret) 89896831f5SEd Cashin goto cmd_fail; 901da177e4SLinus Torvalds ret = register_blkdev(AOE_MAJOR, DEVICE_NAME); 911da177e4SLinus Torvalds if (ret < 0) { 92a12c93f0SEd L. Cashin printk(KERN_ERR "aoe: can't register major\n"); 931da177e4SLinus Torvalds goto blkreg_fail; 941da177e4SLinus Torvalds } 95a12c93f0SEd L. Cashin printk(KERN_INFO "aoe: AoE v%s initialised.\n", VERSION); 961da177e4SLinus Torvalds discover_timer(TINIT); 971da177e4SLinus Torvalds return 0; 981da177e4SLinus Torvalds blkreg_fail: 99896831f5SEd Cashin aoecmd_exit(); 100896831f5SEd Cashin cmd_fail: 1011da177e4SLinus Torvalds aoenet_exit(); 1021da177e4SLinus Torvalds net_fail: 1031da177e4SLinus Torvalds aoeblk_exit(); 1041da177e4SLinus Torvalds blk_fail: 1051da177e4SLinus Torvalds aoechr_exit(); 1061da177e4SLinus Torvalds chr_fail: 1071da177e4SLinus Torvalds aoedev_exit(); 1081da177e4SLinus Torvalds 109a12c93f0SEd L. Cashin printk(KERN_INFO "aoe: initialisation failure.\n"); 1101da177e4SLinus Torvalds return ret; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds module_init(aoe_init); 1141da177e4SLinus Torvalds module_exit(aoe_exit); 1151da177e4SLinus Torvalds 116