Commit | Line | Data |
---|---|---|
519b77b0 | 1 | |
fea05a26 | 2 | /* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */ |
519b77b0 | 3 | #define VERSION "64+" |
1da177e4 LT |
4 | #define AOE_MAJOR 152 |
5 | #define DEVICE_NAME "aoe" | |
fc458dcd | 6 | |
7 | /* set AOE_PARTITIONS to 1 to use whole-disks only | |
8 | * default is 16, which is 15 partitions plus the whole disk | |
9 | */ | |
1da177e4 | 10 | #ifndef AOE_PARTITIONS |
e39526e6 | 11 | #define AOE_PARTITIONS (16) |
1da177e4 | 12 | #endif |
fc458dcd | 13 | |
1da177e4 LT |
14 | #define WHITESPACE " \t\v\f\n" |
15 | ||
16 | enum { | |
17 | AOECMD_ATA, | |
18 | AOECMD_CFG, | |
b6d6c517 | 19 | AOECMD_VEND_MIN = 0xf0, |
1da177e4 LT |
20 | |
21 | AOEFL_RSP = (1<<3), | |
22 | AOEFL_ERR = (1<<2), | |
23 | ||
24 | AOEAFL_EXT = (1<<6), | |
25 | AOEAFL_DEV = (1<<4), | |
26 | AOEAFL_ASYNC = (1<<1), | |
27 | AOEAFL_WRITE = (1<<0), | |
28 | ||
29 | AOECCMD_READ = 0, | |
30 | AOECCMD_TEST, | |
31 | AOECCMD_PTEST, | |
32 | AOECCMD_SET, | |
33 | AOECCMD_FSET, | |
34 | ||
35 | AOE_HVER = 0x10, | |
36 | }; | |
37 | ||
38 | struct aoe_hdr { | |
39 | unsigned char dst[6]; | |
40 | unsigned char src[6]; | |
63e9cc5d | 41 | __be16 type; |
1da177e4 LT |
42 | unsigned char verfl; |
43 | unsigned char err; | |
63e9cc5d | 44 | __be16 major; |
1da177e4 LT |
45 | unsigned char minor; |
46 | unsigned char cmd; | |
63e9cc5d | 47 | __be32 tag; |
1da177e4 LT |
48 | }; |
49 | ||
50 | struct aoe_atahdr { | |
51 | unsigned char aflags; | |
52 | unsigned char errfeat; | |
53 | unsigned char scnt; | |
54 | unsigned char cmdstat; | |
55 | unsigned char lba0; | |
56 | unsigned char lba1; | |
57 | unsigned char lba2; | |
58 | unsigned char lba3; | |
59 | unsigned char lba4; | |
60 | unsigned char lba5; | |
61 | unsigned char res[2]; | |
62 | }; | |
63 | ||
64 | struct aoe_cfghdr { | |
63e9cc5d | 65 | __be16 bufcnt; |
66 | __be16 fwver; | |
19bf2635 | 67 | unsigned char scnt; |
1da177e4 LT |
68 | unsigned char aoeccmd; |
69 | unsigned char cslen[2]; | |
70 | }; | |
71 | ||
72 | enum { | |
73 | DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ | |
74 | DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ | |
75 | DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ | |
b21faa25 EC |
76 | DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */ |
77 | DEVFL_KICKME = (1<<4), /* slow polling network card catch */ | |
78 | DEVFL_NEWSIZE = (1<<5), /* need to update dev size in block layer */ | |
1da177e4 LT |
79 | }; |
80 | ||
81 | enum { | |
19bf2635 | 82 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
68e0d42f EC |
83 | MIN_BUFS = 16, |
84 | NTARGETS = 8, | |
85 | NAOEIFS = 8, | |
69cf2d85 | 86 | NSKBPOOLMAX = 256, |
64a80f5a | 87 | NFACTIVE = 61, |
68e0d42f EC |
88 | |
89 | TIMERTICK = HZ / 10, | |
3a0c40d2 EC |
90 | RTTSCALE = 8, |
91 | RTTDSCALE = 3, | |
5f0c9c48 | 92 | RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE, |
3a0c40d2 | 93 | RTTDEV_INIT = RTTAVG_INIT / 4, |
1da177e4 LT |
94 | }; |
95 | ||
96 | struct buf { | |
1da177e4 | 97 | ulong nframesout; |
1da177e4 LT |
98 | ulong resid; |
99 | ulong bv_resid; | |
100 | sector_t sector; | |
101 | struct bio *bio; | |
102 | struct bio_vec *bv; | |
69cf2d85 | 103 | struct request *rq; |
1da177e4 LT |
104 | }; |
105 | ||
106 | struct frame { | |
896831f5 EC |
107 | struct list_head head; |
108 | u32 tag; | |
5f0c9c48 EC |
109 | struct timeval sent; /* high-res time packet was sent */ |
110 | u32 sent_jiffs; /* low-res jiffies-based sent time */ | |
1da177e4 | 111 | ulong waited; |
3fc9b032 | 112 | ulong waited_total; |
896831f5 | 113 | struct aoetgt *t; /* parent target I belong to */ |
19bf2635 | 114 | sector_t lba; |
896831f5 EC |
115 | struct sk_buff *skb; /* command skb freed on module exit */ |
116 | struct sk_buff *r_skb; /* response skb for async processing */ | |
69cf2d85 | 117 | struct buf *buf; |
3d5b0605 | 118 | struct bio_vec *bv; |
69cf2d85 | 119 | ulong bcnt; |
3d5b0605 | 120 | ulong bv_off; |
1da177e4 LT |
121 | }; |
122 | ||
68e0d42f EC |
123 | struct aoeif { |
124 | struct net_device *nd; | |
3f0f0133 EC |
125 | ulong lost; |
126 | int bcnt; | |
68e0d42f EC |
127 | }; |
128 | ||
129 | struct aoetgt { | |
130 | unsigned char addr[6]; | |
1b8a1636 | 131 | ushort nframes; /* cap on frames to use */ |
896831f5 | 132 | struct aoedev *d; /* parent device I belong to */ |
896831f5 | 133 | struct list_head ffree; /* list of free frames */ |
68e0d42f EC |
134 | struct aoeif ifs[NAOEIFS]; |
135 | struct aoeif *ifp; /* current aoeif in use */ | |
72837600 | 136 | ushort nout; /* number of AoE commands outstanding */ |
1b8a1636 | 137 | ushort maxout; /* current value for max outstanding */ |
3a0c40d2 EC |
138 | ushort next_cwnd; /* incr maxout after decrementing to zero */ |
139 | ushort ssthresh; /* slow start threshold */ | |
1b8a1636 | 140 | ulong falloc; /* number of allocated frames */ |
3f0f0133 | 141 | int minbcnt; |
68e0d42f EC |
142 | int wpkts, rpkts; |
143 | }; | |
144 | ||
1da177e4 LT |
145 | struct aoedev { |
146 | struct aoedev *next; | |
1da177e4 LT |
147 | ulong sysminor; |
148 | ulong aoemajor; | |
5f0c9c48 EC |
149 | u32 rttavg; /* scaled AoE round trip time average */ |
150 | u32 rttdev; /* scaled round trip time mean deviation */ | |
68e0d42f EC |
151 | u16 aoeminor; |
152 | u16 flags; | |
dced3a05 | 153 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
1da177e4 | 154 | u16 fw_ver; /* version of blade's firmware */ |
64a80f5a EC |
155 | u16 lasttag; /* last tag sent */ |
156 | u16 useme; | |
69cf2d85 | 157 | ulong ref; |
1da177e4 LT |
158 | struct work_struct work;/* disk create work struct */ |
159 | struct gendisk *gd; | |
7135a71b | 160 | struct request_queue *blkq; |
a04b41cd | 161 | struct hd_geometry geo; |
1da177e4 LT |
162 | sector_t ssize; |
163 | struct timer_list timer; | |
164 | spinlock_t lock; | |
e9bb8fb0 | 165 | struct sk_buff_head skbpool; |
1da177e4 | 166 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
69cf2d85 EC |
167 | struct { /* pointers to work in progress */ |
168 | struct buf *buf; | |
169 | struct bio *nxbio; | |
170 | struct request *rq; | |
171 | } ip; | |
3f0f0133 | 172 | ulong maxbcnt; |
64a80f5a | 173 | struct list_head factive[NFACTIVE]; /* hash of active frames */ |
3a0c40d2 | 174 | struct list_head rexmitq; /* deferred retransmissions */ |
68e0d42f EC |
175 | struct aoetgt *targets[NTARGETS]; |
176 | struct aoetgt **tgt; /* target in use when working */ | |
896831f5 EC |
177 | struct aoetgt *htgt; /* target needing rexmit assistance */ |
178 | ulong ntargets; | |
179 | ulong kicked; | |
667be1e7 | 180 | char ident[512]; |
1da177e4 LT |
181 | }; |
182 | ||
896831f5 EC |
183 | /* kthread tracking */ |
184 | struct ktstate { | |
185 | struct completion rendez; | |
186 | struct task_struct *task; | |
187 | wait_queue_head_t *waitq; | |
188 | int (*fn) (void); | |
189 | char *name; | |
190 | spinlock_t *lock; | |
191 | }; | |
1da177e4 LT |
192 | |
193 | int aoeblk_init(void); | |
194 | void aoeblk_exit(void); | |
195 | void aoeblk_gdalloc(void *); | |
196 | void aoedisk_rm_sysfs(struct aoedev *d); | |
197 | ||
198 | int aoechr_init(void); | |
199 | void aoechr_exit(void); | |
200 | void aoechr_error(char *); | |
201 | ||
202 | void aoecmd_work(struct aoedev *d); | |
3ae1c24e | 203 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
896831f5 | 204 | struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); |
1da177e4 | 205 | void aoecmd_cfg_rsp(struct sk_buff *); |
c4028958 | 206 | void aoecmd_sleepwork(struct work_struct *); |
3a0c40d2 | 207 | void aoecmd_wreset(struct aoetgt *t); |
68e0d42f | 208 | void aoecmd_cleanslate(struct aoedev *); |
896831f5 EC |
209 | void aoecmd_exit(void); |
210 | int aoecmd_init(void); | |
68e0d42f | 211 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
896831f5 | 212 | void aoe_freetframe(struct frame *); |
69cf2d85 EC |
213 | void aoe_flush_iocq(void); |
214 | void aoe_end_request(struct aoedev *, struct request *, int); | |
eb086ec5 EC |
215 | int aoe_ktstart(struct ktstate *k); |
216 | void aoe_ktstop(struct ktstate *k); | |
1da177e4 LT |
217 | |
218 | int aoedev_init(void); | |
219 | void aoedev_exit(void); | |
0c966214 | 220 | struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); |
1da177e4 | 221 | void aoedev_downdev(struct aoedev *d); |
262bf541 | 222 | int aoedev_flush(const char __user *str, size_t size); |
69cf2d85 EC |
223 | void aoe_failbuf(struct aoedev *, struct buf *); |
224 | void aoedev_put(struct aoedev *); | |
1da177e4 LT |
225 | |
226 | int aoenet_init(void); | |
227 | void aoenet_exit(void); | |
e9bb8fb0 | 228 | void aoenet_xmit(struct sk_buff_head *); |
1da177e4 LT |
229 | int is_aoe_netif(struct net_device *ifp); |
230 | int set_aoe_iflist(const char __user *str, size_t size); |