Ed Cashin | ca47bbd | 2013-07-03 15:09:06 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */ |
Ed Cashin | 896dcd9 | 2013-09-11 14:25:44 -0700 | [diff] [blame] | 2 | #define VERSION "85" |
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 Cashin | 4a6c9ee | 2012-12-17 16:04:15 -0800 | [diff] [blame] | 13 | #define WHITESPACE " \t\v\f\n," |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | enum { |
| 16 | AOECMD_ATA, |
| 17 | AOECMD_CFG, |
Ed Cashin | b6d6c51 | 2009-02-18 14:48:13 -0800 | [diff] [blame] | 18 | AOECMD_VEND_MIN = 0xf0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
| 20 | AOEFL_RSP = (1<<3), |
| 21 | AOEFL_ERR = (1<<2), |
| 22 | |
| 23 | AOEAFL_EXT = (1<<6), |
| 24 | AOEAFL_DEV = (1<<4), |
| 25 | AOEAFL_ASYNC = (1<<1), |
| 26 | AOEAFL_WRITE = (1<<0), |
| 27 | |
| 28 | AOECCMD_READ = 0, |
| 29 | AOECCMD_TEST, |
| 30 | AOECCMD_PTEST, |
| 31 | AOECCMD_SET, |
| 32 | AOECCMD_FSET, |
| 33 | |
| 34 | AOE_HVER = 0x10, |
| 35 | }; |
| 36 | |
| 37 | struct aoe_hdr { |
| 38 | unsigned char dst[6]; |
| 39 | unsigned char src[6]; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 40 | __be16 type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | unsigned char verfl; |
| 42 | unsigned char err; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 43 | __be16 major; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | unsigned char minor; |
| 45 | unsigned char cmd; |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 46 | __be32 tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
| 49 | struct aoe_atahdr { |
| 50 | unsigned char aflags; |
| 51 | unsigned char errfeat; |
| 52 | unsigned char scnt; |
| 53 | unsigned char cmdstat; |
| 54 | unsigned char lba0; |
| 55 | unsigned char lba1; |
| 56 | unsigned char lba2; |
| 57 | unsigned char lba3; |
| 58 | unsigned char lba4; |
| 59 | unsigned char lba5; |
| 60 | unsigned char res[2]; |
| 61 | }; |
| 62 | |
| 63 | struct aoe_cfghdr { |
ecashin@coraid.com | 63e9cc5 | 2005-04-18 22:00:20 -0700 | [diff] [blame] | 64 | __be16 bufcnt; |
| 65 | __be16 fwver; |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 66 | unsigned char scnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | unsigned char aoeccmd; |
| 68 | unsigned char cslen[2]; |
| 69 | }; |
| 70 | |
| 71 | enum { |
| 72 | DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ |
| 73 | DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ |
| 74 | DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ |
Ed Cashin | b21faa2 | 2012-10-04 17:16:35 -0700 | [diff] [blame] | 75 | DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */ |
Ed Cashin | e52a293 | 2012-12-17 16:04:09 -0800 | [diff] [blame] | 76 | DEVFL_GD_NOW = (1<<4), /* allocating gendisk */ |
| 77 | DEVFL_KICKME = (1<<5), /* slow polling network card catch */ |
| 78 | DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */ |
| 79 | DEVFL_FREEING = (1<<7), /* set when device is being cleaned up */ |
| 80 | DEVFL_FREED = (1<<8), /* device has been cleaned up */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | }; |
| 82 | |
| 83 | enum { |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 84 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 85 | MIN_BUFS = 16, |
Ed Cashin | 71114ec | 2012-12-17 16:04:11 -0800 | [diff] [blame] | 86 | NTARGETS = 4, |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 87 | NAOEIFS = 8, |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 88 | NSKBPOOLMAX = 256, |
Ed Cashin | 64a80f5 | 2012-10-04 17:16:33 -0700 | [diff] [blame] | 89 | NFACTIVE = 61, |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 90 | |
| 91 | TIMERTICK = HZ / 10, |
Ed Cashin | 3a0c40d | 2012-12-17 16:03:43 -0800 | [diff] [blame] | 92 | RTTSCALE = 8, |
| 93 | RTTDSCALE = 3, |
Ed Cashin | 5f0c9c4 | 2012-12-17 16:03:49 -0800 | [diff] [blame] | 94 | RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE, |
Ed Cashin | 3a0c40d | 2012-12-17 16:03:43 -0800 | [diff] [blame] | 95 | RTTDEV_INIT = RTTAVG_INIT / 4, |
Ed Cashin | bbb44e3 | 2012-12-17 16:04:08 -0800 | [diff] [blame] | 96 | |
| 97 | HARD_SCORN_SECS = 10, /* try another remote port after this */ |
| 98 | MAX_TAINT = 1000, /* cap on aoetgt taint */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | }; |
| 100 | |
| 101 | struct buf { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | ulong nframesout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | ulong resid; |
| 104 | ulong bv_resid; |
| 105 | sector_t sector; |
| 106 | struct bio *bio; |
| 107 | struct bio_vec *bv; |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 108 | struct request *rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }; |
| 110 | |
Ed Cashin | bbb44e3 | 2012-12-17 16:04:08 -0800 | [diff] [blame] | 111 | enum frame_flags { |
| 112 | FFL_PROBE = 1, |
| 113 | }; |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | struct frame { |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 116 | struct list_head head; |
| 117 | u32 tag; |
Ed Cashin | 5f0c9c4 | 2012-12-17 16:03:49 -0800 | [diff] [blame] | 118 | struct timeval sent; /* high-res time packet was sent */ |
| 119 | u32 sent_jiffs; /* low-res jiffies-based sent time */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | ulong waited; |
Ed Cashin | 3fc9b03 | 2012-12-17 16:03:51 -0800 | [diff] [blame] | 121 | ulong waited_total; |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 122 | struct aoetgt *t; /* parent target I belong to */ |
Ed L. Cashin | 19bf263 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 123 | sector_t lba; |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 124 | struct sk_buff *skb; /* command skb freed on module exit */ |
| 125 | struct sk_buff *r_skb; /* response skb for async processing */ |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 126 | struct buf *buf; |
Ed Cashin | 3d5b060 | 2012-10-04 17:16:20 -0700 | [diff] [blame] | 127 | struct bio_vec *bv; |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 128 | ulong bcnt; |
Ed Cashin | 3d5b060 | 2012-10-04 17:16:20 -0700 | [diff] [blame] | 129 | ulong bv_off; |
Ed Cashin | bbb44e3 | 2012-12-17 16:04:08 -0800 | [diff] [blame] | 130 | char flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | }; |
| 132 | |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 133 | struct aoeif { |
| 134 | struct net_device *nd; |
Ed Cashin | 3f0f013 | 2012-10-04 17:16:27 -0700 | [diff] [blame] | 135 | ulong lost; |
| 136 | int bcnt; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 137 | }; |
| 138 | |
| 139 | struct aoetgt { |
| 140 | unsigned char addr[6]; |
Ed Cashin | 1b8a163 | 2012-12-17 16:03:29 -0800 | [diff] [blame] | 141 | ushort nframes; /* cap on frames to use */ |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 142 | struct aoedev *d; /* parent device I belong to */ |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 143 | struct list_head ffree; /* list of free frames */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 144 | struct aoeif ifs[NAOEIFS]; |
| 145 | struct aoeif *ifp; /* current aoeif in use */ |
Ed Cashin | 7283760 | 2012-12-17 16:04:01 -0800 | [diff] [blame] | 146 | ushort nout; /* number of AoE commands outstanding */ |
Ed Cashin | 1b8a163 | 2012-12-17 16:03:29 -0800 | [diff] [blame] | 147 | ushort maxout; /* current value for max outstanding */ |
Ed Cashin | 3a0c40d | 2012-12-17 16:03:43 -0800 | [diff] [blame] | 148 | ushort next_cwnd; /* incr maxout after decrementing to zero */ |
| 149 | ushort ssthresh; /* slow start threshold */ |
Ed Cashin | 1b8a163 | 2012-12-17 16:03:29 -0800 | [diff] [blame] | 150 | ulong falloc; /* number of allocated frames */ |
Ed Cashin | bbb44e3 | 2012-12-17 16:04:08 -0800 | [diff] [blame] | 151 | int taint; /* how much we want to avoid this aoetgt */ |
Ed Cashin | 3f0f013 | 2012-10-04 17:16:27 -0700 | [diff] [blame] | 152 | int minbcnt; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 153 | int wpkts, rpkts; |
Ed Cashin | bbb44e3 | 2012-12-17 16:04:08 -0800 | [diff] [blame] | 154 | char nout_probes; |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 155 | }; |
| 156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | struct aoedev { |
| 158 | struct aoedev *next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | ulong sysminor; |
| 160 | ulong aoemajor; |
Ed Cashin | 5f0c9c4 | 2012-12-17 16:03:49 -0800 | [diff] [blame] | 161 | u32 rttavg; /* scaled AoE round trip time average */ |
| 162 | u32 rttdev; /* scaled round trip time mean deviation */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 163 | u16 aoeminor; |
| 164 | u16 flags; |
Ed L. Cashin | dced3a0 | 2006-09-20 14:36:49 -0400 | [diff] [blame] | 165 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | u16 fw_ver; /* version of blade's firmware */ |
Ed Cashin | 64a80f5 | 2012-10-04 17:16:33 -0700 | [diff] [blame] | 167 | u16 lasttag; /* last tag sent */ |
| 168 | u16 useme; |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 169 | ulong ref; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | struct work_struct work;/* disk create work struct */ |
| 171 | struct gendisk *gd; |
Ed Cashin | e8866cf | 2013-09-11 14:25:40 -0700 | [diff] [blame] | 172 | struct dentry *debugfs; |
Ed Cashin | 7135a71b | 2009-09-09 14:10:18 +0200 | [diff] [blame] | 173 | struct request_queue *blkq; |
Ed Cashin | a04b41c | 2012-12-17 16:03:39 -0800 | [diff] [blame] | 174 | struct hd_geometry geo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | sector_t ssize; |
| 176 | struct timer_list timer; |
| 177 | spinlock_t lock; |
David S. Miller | e9bb8fb0 | 2008-09-21 22:36:49 -0700 | [diff] [blame] | 178 | struct sk_buff_head skbpool; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 180 | struct { /* pointers to work in progress */ |
| 181 | struct buf *buf; |
| 182 | struct bio *nxbio; |
| 183 | struct request *rq; |
| 184 | } ip; |
Ed Cashin | 3f0f013 | 2012-10-04 17:16:27 -0700 | [diff] [blame] | 185 | ulong maxbcnt; |
Ed Cashin | 64a80f5 | 2012-10-04 17:16:33 -0700 | [diff] [blame] | 186 | struct list_head factive[NFACTIVE]; /* hash of active frames */ |
Ed Cashin | 3a0c40d | 2012-12-17 16:03:43 -0800 | [diff] [blame] | 187 | struct list_head rexmitq; /* deferred retransmissions */ |
Ed Cashin | 71114ec | 2012-12-17 16:04:11 -0800 | [diff] [blame] | 188 | struct aoetgt **targets; |
| 189 | ulong ntargets; /* number of allocated aoetgt pointers */ |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 190 | struct aoetgt **tgt; /* target in use when working */ |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 191 | ulong kicked; |
Ed Cashin | 667be1e | 2012-12-17 16:03:42 -0800 | [diff] [blame] | 192 | char ident[512]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 195 | /* kthread tracking */ |
| 196 | struct ktstate { |
| 197 | struct completion rendez; |
| 198 | struct task_struct *task; |
| 199 | wait_queue_head_t *waitq; |
Ed Cashin | 8030d34 | 2013-07-03 15:09:05 -0700 | [diff] [blame] | 200 | int (*fn) (int); |
| 201 | char name[12]; |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 202 | spinlock_t *lock; |
Ed Cashin | 8030d34 | 2013-07-03 15:09:05 -0700 | [diff] [blame] | 203 | int id; |
| 204 | int active; |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 205 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | int aoeblk_init(void); |
| 208 | void aoeblk_exit(void); |
| 209 | void aoeblk_gdalloc(void *); |
Ed Cashin | e8866cf | 2013-09-11 14:25:40 -0700 | [diff] [blame] | 210 | void aoedisk_rm_debugfs(struct aoedev *d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | void aoedisk_rm_sysfs(struct aoedev *d); |
| 212 | |
| 213 | int aoechr_init(void); |
| 214 | void aoechr_exit(void); |
| 215 | void aoechr_error(char *); |
| 216 | |
| 217 | void aoecmd_work(struct aoedev *d); |
Ed L. Cashin | 3ae1c24 | 2006-01-19 13:46:19 -0500 | [diff] [blame] | 218 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 219 | struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | void aoecmd_cfg_rsp(struct sk_buff *); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 221 | void aoecmd_sleepwork(struct work_struct *); |
Ed Cashin | 3a0c40d | 2012-12-17 16:03:43 -0800 | [diff] [blame] | 222 | void aoecmd_wreset(struct aoetgt *t); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 223 | void aoecmd_cleanslate(struct aoedev *); |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 224 | void aoecmd_exit(void); |
| 225 | int aoecmd_init(void); |
Ed L. Cashin | 68e0d42 | 2008-02-08 04:20:00 -0800 | [diff] [blame] | 226 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
Ed Cashin | 896831f | 2012-10-04 17:16:21 -0700 | [diff] [blame] | 227 | void aoe_freetframe(struct frame *); |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 228 | void aoe_flush_iocq(void); |
Ed Cashin | 8030d34 | 2013-07-03 15:09:05 -0700 | [diff] [blame] | 229 | void aoe_flush_iocq_by_index(int); |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 230 | void aoe_end_request(struct aoedev *, struct request *, int); |
Ed Cashin | eb086ec | 2012-10-04 17:16:25 -0700 | [diff] [blame] | 231 | int aoe_ktstart(struct ktstate *k); |
| 232 | void aoe_ktstop(struct ktstate *k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | int aoedev_init(void); |
| 235 | void aoedev_exit(void); |
Ed Cashin | 0c96621 | 2012-10-04 17:16:40 -0700 | [diff] [blame] | 236 | struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | void aoedev_downdev(struct aoedev *d); |
Ed L. Cashin | 262bf54 | 2008-02-08 04:20:03 -0800 | [diff] [blame] | 238 | int aoedev_flush(const char __user *str, size_t size); |
Ed Cashin | 69cf2d85 | 2012-10-04 17:16:23 -0700 | [diff] [blame] | 239 | void aoe_failbuf(struct aoedev *, struct buf *); |
| 240 | void aoedev_put(struct aoedev *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | int aoenet_init(void); |
| 243 | void aoenet_exit(void); |
David S. Miller | e9bb8fb0 | 2008-09-21 22:36:49 -0700 | [diff] [blame] | 244 | void aoenet_xmit(struct sk_buff_head *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | int is_aoe_netif(struct net_device *ifp); |
| 246 | int set_aoe_iflist(const char __user *str, size_t size); |