Commit | Line | Data |
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ca47bbd9 | 1 | /* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */ |
896dcd9a | 2 | #define VERSION "85" |
1da177e4 LT |
3 | #define AOE_MAJOR 152 |
4 | #define DEVICE_NAME "aoe" | |
fc458dcd | 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 | */ | |
1da177e4 | 9 | #ifndef AOE_PARTITIONS |
e39526e6 | 10 | #define AOE_PARTITIONS (16) |
1da177e4 | 11 | #endif |
fc458dcd | 12 | |
4a6c9ee9 | 13 | #define WHITESPACE " \t\v\f\n," |
1da177e4 LT |
14 | |
15 | enum { | |
16 | AOECMD_ATA, | |
17 | AOECMD_CFG, | |
b6d6c517 | 18 | AOECMD_VEND_MIN = 0xf0, |
1da177e4 LT |
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]; | |
63e9cc5d | 40 | __be16 type; |
1da177e4 LT |
41 | unsigned char verfl; |
42 | unsigned char err; | |
63e9cc5d | 43 | __be16 major; |
1da177e4 LT |
44 | unsigned char minor; |
45 | unsigned char cmd; | |
63e9cc5d | 46 | __be32 tag; |
1da177e4 LT |
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 { | |
63e9cc5d | 64 | __be16 bufcnt; |
65 | __be16 fwver; | |
19bf2635 | 66 | unsigned char scnt; |
1da177e4 LT |
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 */ | |
b21faa25 | 75 | DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */ |
e52a2932 EC |
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 */ | |
1da177e4 LT |
81 | }; |
82 | ||
83 | enum { | |
19bf2635 | 84 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
68e0d42f | 85 | MIN_BUFS = 16, |
71114ec4 | 86 | NTARGETS = 4, |
68e0d42f | 87 | NAOEIFS = 8, |
69cf2d85 | 88 | NSKBPOOLMAX = 256, |
64a80f5a | 89 | NFACTIVE = 61, |
68e0d42f EC |
90 | |
91 | TIMERTICK = HZ / 10, | |
3a0c40d2 EC |
92 | RTTSCALE = 8, |
93 | RTTDSCALE = 3, | |
5f0c9c48 | 94 | RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE, |
3a0c40d2 | 95 | RTTDEV_INIT = RTTAVG_INIT / 4, |
bbb44e30 EC |
96 | |
97 | HARD_SCORN_SECS = 10, /* try another remote port after this */ | |
98 | MAX_TAINT = 1000, /* cap on aoetgt taint */ | |
1da177e4 LT |
99 | }; |
100 | ||
101 | struct buf { | |
1da177e4 | 102 | ulong nframesout; |
1da177e4 | 103 | struct bio *bio; |
feb261e2 | 104 | struct bvec_iter iter; |
69cf2d85 | 105 | struct request *rq; |
1da177e4 LT |
106 | }; |
107 | ||
bbb44e30 EC |
108 | enum frame_flags { |
109 | FFL_PROBE = 1, | |
110 | }; | |
111 | ||
1da177e4 | 112 | struct frame { |
896831f5 EC |
113 | struct list_head head; |
114 | u32 tag; | |
5f0c9c48 EC |
115 | struct timeval sent; /* high-res time packet was sent */ |
116 | u32 sent_jiffs; /* low-res jiffies-based sent time */ | |
1da177e4 | 117 | ulong waited; |
3fc9b032 | 118 | ulong waited_total; |
896831f5 | 119 | struct aoetgt *t; /* parent target I belong to */ |
896831f5 EC |
120 | struct sk_buff *skb; /* command skb freed on module exit */ |
121 | struct sk_buff *r_skb; /* response skb for async processing */ | |
69cf2d85 | 122 | struct buf *buf; |
feb261e2 | 123 | struct bvec_iter iter; |
bbb44e30 | 124 | char flags; |
1da177e4 LT |
125 | }; |
126 | ||
68e0d42f EC |
127 | struct aoeif { |
128 | struct net_device *nd; | |
3f0f0133 EC |
129 | ulong lost; |
130 | int bcnt; | |
68e0d42f EC |
131 | }; |
132 | ||
133 | struct aoetgt { | |
134 | unsigned char addr[6]; | |
1b8a1636 | 135 | ushort nframes; /* cap on frames to use */ |
896831f5 | 136 | struct aoedev *d; /* parent device I belong to */ |
896831f5 | 137 | struct list_head ffree; /* list of free frames */ |
68e0d42f EC |
138 | struct aoeif ifs[NAOEIFS]; |
139 | struct aoeif *ifp; /* current aoeif in use */ | |
72837600 | 140 | ushort nout; /* number of AoE commands outstanding */ |
1b8a1636 | 141 | ushort maxout; /* current value for max outstanding */ |
3a0c40d2 EC |
142 | ushort next_cwnd; /* incr maxout after decrementing to zero */ |
143 | ushort ssthresh; /* slow start threshold */ | |
1b8a1636 | 144 | ulong falloc; /* number of allocated frames */ |
bbb44e30 | 145 | int taint; /* how much we want to avoid this aoetgt */ |
3f0f0133 | 146 | int minbcnt; |
68e0d42f | 147 | int wpkts, rpkts; |
bbb44e30 | 148 | char nout_probes; |
68e0d42f EC |
149 | }; |
150 | ||
1da177e4 LT |
151 | struct aoedev { |
152 | struct aoedev *next; | |
1da177e4 LT |
153 | ulong sysminor; |
154 | ulong aoemajor; | |
5f0c9c48 EC |
155 | u32 rttavg; /* scaled AoE round trip time average */ |
156 | u32 rttdev; /* scaled round trip time mean deviation */ | |
68e0d42f EC |
157 | u16 aoeminor; |
158 | u16 flags; | |
dced3a05 | 159 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
1da177e4 | 160 | u16 fw_ver; /* version of blade's firmware */ |
64a80f5a EC |
161 | u16 lasttag; /* last tag sent */ |
162 | u16 useme; | |
69cf2d85 | 163 | ulong ref; |
1da177e4 LT |
164 | struct work_struct work;/* disk create work struct */ |
165 | struct gendisk *gd; | |
e8866cf2 | 166 | struct dentry *debugfs; |
7135a71b | 167 | struct request_queue *blkq; |
a04b41cd | 168 | struct hd_geometry geo; |
1da177e4 LT |
169 | sector_t ssize; |
170 | struct timer_list timer; | |
171 | spinlock_t lock; | |
e9bb8fb0 | 172 | struct sk_buff_head skbpool; |
1da177e4 | 173 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
69cf2d85 EC |
174 | struct { /* pointers to work in progress */ |
175 | struct buf *buf; | |
176 | struct bio *nxbio; | |
177 | struct request *rq; | |
178 | } ip; | |
3f0f0133 | 179 | ulong maxbcnt; |
64a80f5a | 180 | struct list_head factive[NFACTIVE]; /* hash of active frames */ |
3a0c40d2 | 181 | struct list_head rexmitq; /* deferred retransmissions */ |
71114ec4 EC |
182 | struct aoetgt **targets; |
183 | ulong ntargets; /* number of allocated aoetgt pointers */ | |
68e0d42f | 184 | struct aoetgt **tgt; /* target in use when working */ |
896831f5 | 185 | ulong kicked; |
667be1e7 | 186 | char ident[512]; |
1da177e4 LT |
187 | }; |
188 | ||
896831f5 EC |
189 | /* kthread tracking */ |
190 | struct ktstate { | |
191 | struct completion rendez; | |
192 | struct task_struct *task; | |
193 | wait_queue_head_t *waitq; | |
8030d343 EC |
194 | int (*fn) (int); |
195 | char name[12]; | |
896831f5 | 196 | spinlock_t *lock; |
8030d343 EC |
197 | int id; |
198 | int active; | |
896831f5 | 199 | }; |
1da177e4 LT |
200 | |
201 | int aoeblk_init(void); | |
202 | void aoeblk_exit(void); | |
203 | void aoeblk_gdalloc(void *); | |
e8866cf2 | 204 | void aoedisk_rm_debugfs(struct aoedev *d); |
1da177e4 LT |
205 | void aoedisk_rm_sysfs(struct aoedev *d); |
206 | ||
207 | int aoechr_init(void); | |
208 | void aoechr_exit(void); | |
209 | void aoechr_error(char *); | |
210 | ||
211 | void aoecmd_work(struct aoedev *d); | |
3ae1c24e | 212 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
896831f5 | 213 | struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); |
1da177e4 | 214 | void aoecmd_cfg_rsp(struct sk_buff *); |
c4028958 | 215 | void aoecmd_sleepwork(struct work_struct *); |
3a0c40d2 | 216 | void aoecmd_wreset(struct aoetgt *t); |
68e0d42f | 217 | void aoecmd_cleanslate(struct aoedev *); |
896831f5 EC |
218 | void aoecmd_exit(void); |
219 | int aoecmd_init(void); | |
68e0d42f | 220 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
896831f5 | 221 | void aoe_freetframe(struct frame *); |
69cf2d85 | 222 | void aoe_flush_iocq(void); |
8030d343 | 223 | void aoe_flush_iocq_by_index(int); |
69cf2d85 | 224 | void aoe_end_request(struct aoedev *, struct request *, int); |
eb086ec5 EC |
225 | int aoe_ktstart(struct ktstate *k); |
226 | void aoe_ktstop(struct ktstate *k); | |
1da177e4 LT |
227 | |
228 | int aoedev_init(void); | |
229 | void aoedev_exit(void); | |
0c966214 | 230 | struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); |
1da177e4 | 231 | void aoedev_downdev(struct aoedev *d); |
262bf541 | 232 | int aoedev_flush(const char __user *str, size_t size); |
69cf2d85 EC |
233 | void aoe_failbuf(struct aoedev *, struct buf *); |
234 | void aoedev_put(struct aoedev *); | |
1da177e4 LT |
235 | |
236 | int aoenet_init(void); | |
237 | void aoenet_exit(void); | |
e9bb8fb0 | 238 | void aoenet_xmit(struct sk_buff_head *); |
1da177e4 LT |
239 | int is_aoe_netif(struct net_device *ifp); |
240 | int set_aoe_iflist(const char __user *str, size_t size); |