Commit | Line | Data |
---|---|---|
fea05a26 | 1 | /* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */ |
cd220bf5 | 2 | #define VERSION "60" |
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 | |
1da177e4 LT |
13 | #define WHITESPACE " \t\v\f\n" |
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 EC |
75 | DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */ |
76 | DEVFL_KICKME = (1<<4), /* slow polling network card catch */ | |
77 | DEVFL_NEWSIZE = (1<<5), /* need to update dev size in block layer */ | |
1da177e4 LT |
78 | }; |
79 | ||
80 | enum { | |
19bf2635 | 81 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
68e0d42f EC |
82 | MIN_BUFS = 16, |
83 | NTARGETS = 8, | |
84 | NAOEIFS = 8, | |
69cf2d85 | 85 | NSKBPOOLMAX = 256, |
64a80f5a | 86 | NFACTIVE = 61, |
68e0d42f EC |
87 | |
88 | TIMERTICK = HZ / 10, | |
3a0c40d2 EC |
89 | RTTSCALE = 8, |
90 | RTTDSCALE = 3, | |
5f0c9c48 | 91 | RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE, |
3a0c40d2 | 92 | RTTDEV_INIT = RTTAVG_INIT / 4, |
1da177e4 LT |
93 | }; |
94 | ||
95 | struct buf { | |
1da177e4 | 96 | ulong nframesout; |
1da177e4 LT |
97 | ulong resid; |
98 | ulong bv_resid; | |
99 | sector_t sector; | |
100 | struct bio *bio; | |
101 | struct bio_vec *bv; | |
69cf2d85 | 102 | struct request *rq; |
1da177e4 LT |
103 | }; |
104 | ||
105 | struct frame { | |
896831f5 EC |
106 | struct list_head head; |
107 | u32 tag; | |
5f0c9c48 EC |
108 | struct timeval sent; /* high-res time packet was sent */ |
109 | u32 sent_jiffs; /* low-res jiffies-based sent time */ | |
1da177e4 | 110 | ulong waited; |
896831f5 | 111 | struct aoetgt *t; /* parent target I belong to */ |
19bf2635 | 112 | sector_t lba; |
896831f5 EC |
113 | struct sk_buff *skb; /* command skb freed on module exit */ |
114 | struct sk_buff *r_skb; /* response skb for async processing */ | |
69cf2d85 | 115 | struct buf *buf; |
3d5b0605 | 116 | struct bio_vec *bv; |
69cf2d85 | 117 | ulong bcnt; |
3d5b0605 | 118 | ulong bv_off; |
1da177e4 LT |
119 | }; |
120 | ||
68e0d42f EC |
121 | struct aoeif { |
122 | struct net_device *nd; | |
3f0f0133 EC |
123 | ulong lost; |
124 | int bcnt; | |
68e0d42f EC |
125 | }; |
126 | ||
127 | struct aoetgt { | |
128 | unsigned char addr[6]; | |
1b8a1636 | 129 | ushort nframes; /* cap on frames to use */ |
896831f5 | 130 | struct aoedev *d; /* parent device I belong to */ |
896831f5 | 131 | struct list_head ffree; /* list of free frames */ |
68e0d42f EC |
132 | struct aoeif ifs[NAOEIFS]; |
133 | struct aoeif *ifp; /* current aoeif in use */ | |
3a0c40d2 | 134 | ushort nout; /* value of nout when skb was sent */ |
1b8a1636 | 135 | ushort maxout; /* current value for max outstanding */ |
3a0c40d2 EC |
136 | ushort next_cwnd; /* incr maxout after decrementing to zero */ |
137 | ushort ssthresh; /* slow start threshold */ | |
1b8a1636 | 138 | ulong falloc; /* number of allocated frames */ |
3f0f0133 | 139 | int minbcnt; |
68e0d42f EC |
140 | int wpkts, rpkts; |
141 | }; | |
142 | ||
1da177e4 LT |
143 | struct aoedev { |
144 | struct aoedev *next; | |
1da177e4 LT |
145 | ulong sysminor; |
146 | ulong aoemajor; | |
5f0c9c48 EC |
147 | u32 rttavg; /* scaled AoE round trip time average */ |
148 | u32 rttdev; /* scaled round trip time mean deviation */ | |
68e0d42f EC |
149 | u16 aoeminor; |
150 | u16 flags; | |
dced3a05 | 151 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
1da177e4 | 152 | u16 fw_ver; /* version of blade's firmware */ |
64a80f5a EC |
153 | u16 lasttag; /* last tag sent */ |
154 | u16 useme; | |
69cf2d85 | 155 | ulong ref; |
1da177e4 LT |
156 | struct work_struct work;/* disk create work struct */ |
157 | struct gendisk *gd; | |
7135a71b | 158 | struct request_queue *blkq; |
a04b41cd | 159 | struct hd_geometry geo; |
1da177e4 LT |
160 | sector_t ssize; |
161 | struct timer_list timer; | |
162 | spinlock_t lock; | |
e9bb8fb0 | 163 | struct sk_buff_head skbpool; |
1da177e4 | 164 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
69cf2d85 EC |
165 | struct { /* pointers to work in progress */ |
166 | struct buf *buf; | |
167 | struct bio *nxbio; | |
168 | struct request *rq; | |
169 | } ip; | |
3f0f0133 | 170 | ulong maxbcnt; |
64a80f5a | 171 | struct list_head factive[NFACTIVE]; /* hash of active frames */ |
3a0c40d2 | 172 | struct list_head rexmitq; /* deferred retransmissions */ |
68e0d42f EC |
173 | struct aoetgt *targets[NTARGETS]; |
174 | struct aoetgt **tgt; /* target in use when working */ | |
896831f5 EC |
175 | struct aoetgt *htgt; /* target needing rexmit assistance */ |
176 | ulong ntargets; | |
177 | ulong kicked; | |
667be1e7 | 178 | char ident[512]; |
1da177e4 LT |
179 | }; |
180 | ||
896831f5 EC |
181 | /* kthread tracking */ |
182 | struct ktstate { | |
183 | struct completion rendez; | |
184 | struct task_struct *task; | |
185 | wait_queue_head_t *waitq; | |
186 | int (*fn) (void); | |
187 | char *name; | |
188 | spinlock_t *lock; | |
189 | }; | |
1da177e4 LT |
190 | |
191 | int aoeblk_init(void); | |
192 | void aoeblk_exit(void); | |
193 | void aoeblk_gdalloc(void *); | |
194 | void aoedisk_rm_sysfs(struct aoedev *d); | |
195 | ||
196 | int aoechr_init(void); | |
197 | void aoechr_exit(void); | |
198 | void aoechr_error(char *); | |
199 | ||
200 | void aoecmd_work(struct aoedev *d); | |
3ae1c24e | 201 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
896831f5 | 202 | struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); |
1da177e4 | 203 | void aoecmd_cfg_rsp(struct sk_buff *); |
c4028958 | 204 | void aoecmd_sleepwork(struct work_struct *); |
3a0c40d2 | 205 | void aoecmd_wreset(struct aoetgt *t); |
68e0d42f | 206 | void aoecmd_cleanslate(struct aoedev *); |
896831f5 EC |
207 | void aoecmd_exit(void); |
208 | int aoecmd_init(void); | |
68e0d42f | 209 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
896831f5 | 210 | void aoe_freetframe(struct frame *); |
69cf2d85 EC |
211 | void aoe_flush_iocq(void); |
212 | void aoe_end_request(struct aoedev *, struct request *, int); | |
eb086ec5 EC |
213 | int aoe_ktstart(struct ktstate *k); |
214 | void aoe_ktstop(struct ktstate *k); | |
1da177e4 LT |
215 | |
216 | int aoedev_init(void); | |
217 | void aoedev_exit(void); | |
0c966214 | 218 | struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); |
1da177e4 | 219 | void aoedev_downdev(struct aoedev *d); |
262bf541 | 220 | int aoedev_flush(const char __user *str, size_t size); |
69cf2d85 EC |
221 | void aoe_failbuf(struct aoedev *, struct buf *); |
222 | void aoedev_put(struct aoedev *); | |
1da177e4 LT |
223 | |
224 | int aoenet_init(void); | |
225 | void aoenet_exit(void); | |
e9bb8fb0 | 226 | void aoenet_xmit(struct sk_buff_head *); |
1da177e4 LT |
227 | int is_aoe_netif(struct net_device *ifp); |
228 | int set_aoe_iflist(const char __user *str, size_t size); |