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Commit | Line | Data |
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fea05a26 | 1 | /* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */ |
322c9ec0 | 2 | #define VERSION "50" |
1da177e4 LT |
3 | #define AOE_MAJOR 152 |
4 | #define DEVICE_NAME "aoe" | |
fc458dcd EC |
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 EC |
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, | |
89 | MINTIMER = HZ >> 2, | |
90 | MAXTIMER = HZ << 1, | |
1da177e4 LT |
91 | }; |
92 | ||
93 | struct buf { | |
1da177e4 | 94 | ulong nframesout; |
1da177e4 LT |
95 | ulong resid; |
96 | ulong bv_resid; | |
97 | sector_t sector; | |
98 | struct bio *bio; | |
99 | struct bio_vec *bv; | |
69cf2d85 | 100 | struct request *rq; |
1da177e4 LT |
101 | }; |
102 | ||
103 | struct frame { | |
896831f5 EC |
104 | struct list_head head; |
105 | u32 tag; | |
1da177e4 | 106 | ulong waited; |
896831f5 | 107 | struct aoetgt *t; /* parent target I belong to */ |
19bf2635 | 108 | sector_t lba; |
896831f5 EC |
109 | struct sk_buff *skb; /* command skb freed on module exit */ |
110 | struct sk_buff *r_skb; /* response skb for async processing */ | |
69cf2d85 | 111 | struct buf *buf; |
3d5b0605 | 112 | struct bio_vec *bv; |
69cf2d85 | 113 | ulong bcnt; |
3d5b0605 | 114 | ulong bv_off; |
1da177e4 LT |
115 | }; |
116 | ||
68e0d42f EC |
117 | struct aoeif { |
118 | struct net_device *nd; | |
3f0f0133 EC |
119 | ulong lost; |
120 | int bcnt; | |
68e0d42f EC |
121 | }; |
122 | ||
123 | struct aoetgt { | |
124 | unsigned char addr[6]; | |
1b8a1636 | 125 | ushort nframes; /* cap on frames to use */ |
896831f5 | 126 | struct aoedev *d; /* parent device I belong to */ |
896831f5 | 127 | struct list_head ffree; /* list of free frames */ |
68e0d42f EC |
128 | struct aoeif ifs[NAOEIFS]; |
129 | struct aoeif *ifp; /* current aoeif in use */ | |
130 | ushort nout; | |
1b8a1636 EC |
131 | ushort maxout; /* current value for max outstanding */ |
132 | ulong falloc; /* number of allocated frames */ | |
68e0d42f | 133 | ulong lastwadj; /* last window adjustment */ |
3f0f0133 | 134 | int minbcnt; |
68e0d42f EC |
135 | int wpkts, rpkts; |
136 | }; | |
137 | ||
1da177e4 LT |
138 | struct aoedev { |
139 | struct aoedev *next; | |
1da177e4 LT |
140 | ulong sysminor; |
141 | ulong aoemajor; | |
68e0d42f EC |
142 | u16 aoeminor; |
143 | u16 flags; | |
dced3a05 | 144 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
dced3a05 EC |
145 | u16 rttavg; /* round trip average of requests/responses */ |
146 | u16 mintimer; | |
1da177e4 | 147 | u16 fw_ver; /* version of blade's firmware */ |
64a80f5a EC |
148 | u16 lasttag; /* last tag sent */ |
149 | u16 useme; | |
69cf2d85 | 150 | ulong ref; |
1da177e4 LT |
151 | struct work_struct work;/* disk create work struct */ |
152 | struct gendisk *gd; | |
7135a71b | 153 | struct request_queue *blkq; |
a04b41cd | 154 | struct hd_geometry geo; |
1da177e4 LT |
155 | sector_t ssize; |
156 | struct timer_list timer; | |
157 | spinlock_t lock; | |
e9bb8fb0 | 158 | struct sk_buff_head skbpool; |
1da177e4 | 159 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
69cf2d85 EC |
160 | struct { /* pointers to work in progress */ |
161 | struct buf *buf; | |
162 | struct bio *nxbio; | |
163 | struct request *rq; | |
164 | } ip; | |
3f0f0133 | 165 | ulong maxbcnt; |
64a80f5a | 166 | struct list_head factive[NFACTIVE]; /* hash of active frames */ |
68e0d42f EC |
167 | struct aoetgt *targets[NTARGETS]; |
168 | struct aoetgt **tgt; /* target in use when working */ | |
896831f5 EC |
169 | struct aoetgt *htgt; /* target needing rexmit assistance */ |
170 | ulong ntargets; | |
171 | ulong kicked; | |
1da177e4 LT |
172 | }; |
173 | ||
896831f5 EC |
174 | /* kthread tracking */ |
175 | struct ktstate { | |
176 | struct completion rendez; | |
177 | struct task_struct *task; | |
178 | wait_queue_head_t *waitq; | |
179 | int (*fn) (void); | |
180 | char *name; | |
181 | spinlock_t *lock; | |
182 | }; | |
1da177e4 LT |
183 | |
184 | int aoeblk_init(void); | |
185 | void aoeblk_exit(void); | |
186 | void aoeblk_gdalloc(void *); | |
187 | void aoedisk_rm_sysfs(struct aoedev *d); | |
188 | ||
189 | int aoechr_init(void); | |
190 | void aoechr_exit(void); | |
191 | void aoechr_error(char *); | |
192 | ||
193 | void aoecmd_work(struct aoedev *d); | |
3ae1c24e | 194 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
896831f5 | 195 | struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); |
1da177e4 | 196 | void aoecmd_cfg_rsp(struct sk_buff *); |
c4028958 | 197 | void aoecmd_sleepwork(struct work_struct *); |
68e0d42f | 198 | void aoecmd_cleanslate(struct aoedev *); |
896831f5 EC |
199 | void aoecmd_exit(void); |
200 | int aoecmd_init(void); | |
68e0d42f | 201 | struct sk_buff *aoecmd_ata_id(struct aoedev *); |
896831f5 | 202 | void aoe_freetframe(struct frame *); |
69cf2d85 EC |
203 | void aoe_flush_iocq(void); |
204 | void aoe_end_request(struct aoedev *, struct request *, int); | |
eb086ec5 EC |
205 | int aoe_ktstart(struct ktstate *k); |
206 | void aoe_ktstop(struct ktstate *k); | |
1da177e4 LT |
207 | |
208 | int aoedev_init(void); | |
209 | void aoedev_exit(void); | |
0c966214 | 210 | struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); |
1da177e4 | 211 | void aoedev_downdev(struct aoedev *d); |
262bf541 | 212 | int aoedev_flush(const char __user *str, size_t size); |
69cf2d85 EC |
213 | void aoe_failbuf(struct aoedev *, struct buf *); |
214 | void aoedev_put(struct aoedev *); | |
1da177e4 LT |
215 | |
216 | int aoenet_init(void); | |
217 | void aoenet_exit(void); | |
e9bb8fb0 | 218 | void aoenet_xmit(struct sk_buff_head *); |
1da177e4 LT |
219 | int is_aoe_netif(struct net_device *ifp); |
220 | int set_aoe_iflist(const char __user *str, size_t size); |