Ed L. Cashin | 2611464 | 2006-09-20 14:36:48 -0400 | [diff] [blame] | 1 | /* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */ |
Ed L. Cashin | 8911ef4 | 2008-02-08 04:19:58 -0800 | [diff] [blame] | 2 | #define VERSION "47" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | #define AOE_MAJOR 152 |
| 4 | #define DEVICE_NAME "aoe" |
ecashin@coraid.com | fc458dc | 2005-04-18 22:00:17 -0700 | [diff] [blame] | 5 | |
| 6 | /* set AOE_PARTITIONS to 1 to use whole-disks only |
| 7 | * default is 16, which is 15 partitions plus the whole disk |
| 8 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #ifndef AOE_PARTITIONS |
Ed L Cashin | e39526e | 2005-08-19 16:54:43 -0400 | [diff] [blame] | 10 | #define AOE_PARTITIONS (16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #endif |
ecashin@coraid.com | fc458dc | 2005-04-18 22:00:17 -0700 | [diff] [blame] | 12 | |
Ed L Cashin | e39526e | 2005-08-19 16:54:43 -0400 | [diff] [blame] | 13 | #define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor)) |
| 14 | #define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF) |
| 15 | #define AOEMINOR(sysminor) ((sysminor) % NPERSHELF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #define WHITESPACE " \t\v\f\n" |
| 17 | |
| 18 | enum { |
| 19 | AOECMD_ATA, |
| 20 | AOECMD_CFG, |
| 21 | |
| 22 | AOEFL_RSP = (1<<3), |
| 23 | AOEFL_ERR = (1<<2), |
| 24 | |
| 25 | AOEAFL_EXT = (1<<6), |
| 26 | AOEAFL_DEV = (1<<4), |
| 27 | AOEAFL_ASYNC = (1<<1), |
| 28 | AOEAFL_WRITE = (1<<0), |
| 29 | |
| 30 | AOECCMD_READ = 0, |
| 31 | AOECCMD_TEST, |
| 32 | AOECCMD_PTEST, |
| 33 | AOECCMD_SET, |
| 34 | AOECCMD_FSET, |
| 35 | |
| 36 | AOE_HVER = 0x10, |
| 37 | }; |
| 38 | |
| 39 | struct aoe_hdr { |
| 40 | unsigned char dst[6]; |
| 41 | unsigned char src[6]; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 42 | __be16 type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | unsigned char verfl; |
| 44 | unsigned char err; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 45 | __be16 major; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | unsigned char minor; |
| 47 | unsigned char cmd; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 48 | __be32 tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | struct aoe_atahdr { |
| 52 | unsigned char aflags; |
| 53 | unsigned char errfeat; |
| 54 | unsigned char scnt; |
| 55 | unsigned char cmdstat; |
| 56 | unsigned char lba0; |
| 57 | unsigned char lba1; |
| 58 | unsigned char lba2; |
| 59 | unsigned char lba3; |
| 60 | unsigned char lba4; |
| 61 | unsigned char lba5; |
| 62 | unsigned char res[2]; |
| 63 | }; |
| 64 | |
| 65 | struct aoe_cfghdr { |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 66 | __be16 bufcnt; |
| 67 | __be16 fwver; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 68 | unsigned char scnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | unsigned char aoeccmd; |
| 70 | unsigned char cslen[2]; |
| 71 | }; |
| 72 | |
| 73 | enum { |
| 74 | DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ |
| 75 | DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ |
| 76 | DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ |
| 77 | DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */ |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 78 | DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 79 | DEVFL_KICKME = (1<<5), /* slow polling network card catch */ |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 80 | DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | BUFFL_FAIL = 1, |
| 83 | }; |
| 84 | |
| 85 | enum { |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 86 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
Ed L Cashin | e39526e | 2005-08-19 16:54:43 -0400 | [diff] [blame] | 87 | NPERSHELF = 16, /* number of slots per shelf address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | FREETAG = -1, |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 89 | MIN_BUFS = 16, |
| 90 | NTARGETS = 8, |
| 91 | NAOEIFS = 8, |
| 92 | |
| 93 | TIMERTICK = HZ / 10, |
| 94 | MINTIMER = HZ >> 2, |
| 95 | MAXTIMER = HZ << 1, |
| 96 | HELPWAIT = 20, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | }; |
| 98 | |
| 99 | struct buf { |
| 100 | struct list_head bufs; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 101 | ulong stime; /* for disk stats */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | ulong flags; |
| 103 | ulong nframesout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | ulong resid; |
| 105 | ulong bv_resid; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 106 | ulong bv_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | sector_t sector; |
| 108 | struct bio *bio; |
| 109 | struct bio_vec *bv; |
| 110 | }; |
| 111 | |
| 112 | struct frame { |
| 113 | int tag; |
| 114 | ulong waited; |
| 115 | struct buf *buf; |
| 116 | char *bufaddr; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 117 | ulong bcnt; |
| 118 | sector_t lba; |
Ed L. Cashin | e407a7f | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 119 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | }; |
| 121 | |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 122 | struct aoeif { |
| 123 | struct net_device *nd; |
| 124 | unsigned char lost; |
| 125 | unsigned char lostjumbo; |
| 126 | ushort maxbcnt; |
| 127 | }; |
| 128 | |
| 129 | struct aoetgt { |
| 130 | unsigned char addr[6]; |
| 131 | ushort nframes; |
| 132 | struct frame *frames; |
| 133 | struct aoeif ifs[NAOEIFS]; |
| 134 | struct aoeif *ifp; /* current aoeif in use */ |
| 135 | ushort nout; |
| 136 | ushort maxout; |
| 137 | u16 lasttag; /* last tag sent */ |
| 138 | u16 useme; |
| 139 | ulong lastwadj; /* last window adjustment */ |
| 140 | int wpkts, rpkts; |
| 141 | }; |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | struct aoedev { |
| 144 | struct aoedev *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | ulong sysminor; |
| 146 | ulong aoemajor; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 147 | u16 aoeminor; |
| 148 | u16 flags; |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 149 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 150 | u16 rttavg; /* round trip average of requests/responses */ |
| 151 | u16 mintimer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | u16 fw_ver; /* version of blade's firmware */ |
| 153 | struct work_struct work;/* disk create work struct */ |
| 154 | struct gendisk *gd; |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 155 | struct request_queue blkq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | struct hd_geometry geo; |
| 157 | sector_t ssize; |
| 158 | struct timer_list timer; |
| 159 | spinlock_t lock; |
ecashin@coraid.com | a4b3836 | 2005-04-18 22:00:22 -0700 | [diff] [blame] | 160 | struct sk_buff *sendq_hd; /* packets needing to be sent, list head */ |
| 161 | struct sk_buff *sendq_tl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
| 163 | struct list_head bufq; /* queue of bios to work on */ |
| 164 | struct buf *inprocess; /* the one we're currently working on */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 165 | struct aoetgt *targets[NTARGETS]; |
| 166 | struct aoetgt **tgt; /* target in use when working */ |
| 167 | struct aoetgt **htgt; /* target needing rexmit assistance */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | |
| 171 | int aoeblk_init(void); |
| 172 | void aoeblk_exit(void); |
| 173 | void aoeblk_gdalloc(void *); |
| 174 | void aoedisk_rm_sysfs(struct aoedev *d); |
| 175 | |
| 176 | int aoechr_init(void); |
| 177 | void aoechr_exit(void); |
| 178 | void aoechr_error(char *); |
| 179 | |
| 180 | void aoecmd_work(struct aoedev *d); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 181 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | void aoecmd_ata_rsp(struct sk_buff *); |
| 183 | void aoecmd_cfg_rsp(struct sk_buff *); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 184 | void aoecmd_sleepwork(struct work_struct *); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 185 | void aoecmd_cleanslate(struct aoedev *); |
| 186 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | int aoedev_init(void); |
| 189 | void aoedev_exit(void); |
ecashin@coraid.com | 32465c6 | 2005-04-18 22:00:18 -0700 | [diff] [blame] | 190 | struct aoedev *aoedev_by_aoeaddr(int maj, int min); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 191 | struct aoedev *aoedev_by_sysminor_m(ulong sysminor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | void aoedev_downdev(struct aoedev *d); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 193 | int aoedev_isbusy(struct aoedev *d); |
Ed L. Cashin | 262bf54 | 2008-02-08 04:20:03 -0800 | [diff] [blame^] | 194 | int aoedev_flush(const char __user *str, size_t size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | int aoenet_init(void); |
| 197 | void aoenet_exit(void); |
| 198 | void aoenet_xmit(struct sk_buff *); |
| 199 | int is_aoe_netif(struct net_device *ifp); |
| 200 | int set_aoe_iflist(const char __user *str, size_t size); |
| 201 | |
Ed L. Cashin | 1eb0da4 | 2008-02-08 04:20:01 -0800 | [diff] [blame] | 202 | unsigned long long mac_addr(char addr[6]); |