Commit | Line | Data |
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52e112b3 | 1 | /* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */ |
8911ef4d | 2 | #define VERSION "47" |
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 | |
e39526e6 EC |
13 | #define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor)) |
14 | #define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF) | |
15 | #define AOEMINOR(sysminor) ((sysminor) % NPERSHELF) | |
1da177e4 LT |
16 | #define WHITESPACE " \t\v\f\n" |
17 | ||
18 | enum { | |
19 | AOECMD_ATA, | |
20 | AOECMD_CFG, | |
b6d6c517 | 21 | AOECMD_VEND_MIN = 0xf0, |
1da177e4 LT |
22 | |
23 | AOEFL_RSP = (1<<3), | |
24 | AOEFL_ERR = (1<<2), | |
25 | ||
26 | AOEAFL_EXT = (1<<6), | |
27 | AOEAFL_DEV = (1<<4), | |
28 | AOEAFL_ASYNC = (1<<1), | |
29 | AOEAFL_WRITE = (1<<0), | |
30 | ||
31 | AOECCMD_READ = 0, | |
32 | AOECCMD_TEST, | |
33 | AOECCMD_PTEST, | |
34 | AOECCMD_SET, | |
35 | AOECCMD_FSET, | |
36 | ||
37 | AOE_HVER = 0x10, | |
38 | }; | |
39 | ||
40 | struct aoe_hdr { | |
41 | unsigned char dst[6]; | |
42 | unsigned char src[6]; | |
63e9cc5d | 43 | __be16 type; |
1da177e4 LT |
44 | unsigned char verfl; |
45 | unsigned char err; | |
63e9cc5d | 46 | __be16 major; |
1da177e4 LT |
47 | unsigned char minor; |
48 | unsigned char cmd; | |
63e9cc5d | 49 | __be32 tag; |
1da177e4 LT |
50 | }; |
51 | ||
52 | struct aoe_atahdr { | |
53 | unsigned char aflags; | |
54 | unsigned char errfeat; | |
55 | unsigned char scnt; | |
56 | unsigned char cmdstat; | |
57 | unsigned char lba0; | |
58 | unsigned char lba1; | |
59 | unsigned char lba2; | |
60 | unsigned char lba3; | |
61 | unsigned char lba4; | |
62 | unsigned char lba5; | |
63 | unsigned char res[2]; | |
64 | }; | |
65 | ||
66 | struct aoe_cfghdr { | |
63e9cc5d | 67 | __be16 bufcnt; |
68 | __be16 fwver; | |
19bf2635 | 69 | unsigned char scnt; |
1da177e4 LT |
70 | unsigned char aoeccmd; |
71 | unsigned char cslen[2]; | |
72 | }; | |
73 | ||
74 | enum { | |
75 | DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ | |
76 | DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ | |
77 | DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ | |
78 | DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */ | |
3ae1c24e | 79 | DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */ |
68e0d42f | 80 | DEVFL_KICKME = (1<<5), /* slow polling network card catch */ |
3ae1c24e | 81 | DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */ |
1da177e4 LT |
82 | |
83 | BUFFL_FAIL = 1, | |
84 | }; | |
85 | ||
86 | enum { | |
19bf2635 | 87 | DEFAULTBCNT = 2 * 512, /* 2 sectors */ |
e39526e6 | 88 | NPERSHELF = 16, /* number of slots per shelf address */ |
1da177e4 | 89 | FREETAG = -1, |
68e0d42f EC |
90 | MIN_BUFS = 16, |
91 | NTARGETS = 8, | |
92 | NAOEIFS = 8, | |
9bb237b6 | 93 | NSKBPOOLMAX = 128, |
68e0d42f EC |
94 | |
95 | TIMERTICK = HZ / 10, | |
96 | MINTIMER = HZ >> 2, | |
97 | MAXTIMER = HZ << 1, | |
98 | HELPWAIT = 20, | |
1da177e4 LT |
99 | }; |
100 | ||
101 | struct buf { | |
102 | struct list_head bufs; | |
68e0d42f | 103 | ulong stime; /* for disk stats */ |
1da177e4 LT |
104 | ulong flags; |
105 | ulong nframesout; | |
1da177e4 LT |
106 | ulong resid; |
107 | ulong bv_resid; | |
68e0d42f | 108 | ulong bv_off; |
1da177e4 LT |
109 | sector_t sector; |
110 | struct bio *bio; | |
111 | struct bio_vec *bv; | |
112 | }; | |
113 | ||
114 | struct frame { | |
115 | int tag; | |
116 | ulong waited; | |
117 | struct buf *buf; | |
118 | char *bufaddr; | |
19bf2635 EC |
119 | ulong bcnt; |
120 | sector_t lba; | |
e407a7f6 | 121 | struct sk_buff *skb; |
1da177e4 LT |
122 | }; |
123 | ||
68e0d42f EC |
124 | struct aoeif { |
125 | struct net_device *nd; | |
126 | unsigned char lost; | |
127 | unsigned char lostjumbo; | |
128 | ushort maxbcnt; | |
129 | }; | |
130 | ||
131 | struct aoetgt { | |
132 | unsigned char addr[6]; | |
133 | ushort nframes; | |
134 | struct frame *frames; | |
135 | struct aoeif ifs[NAOEIFS]; | |
136 | struct aoeif *ifp; /* current aoeif in use */ | |
137 | ushort nout; | |
138 | ushort maxout; | |
139 | u16 lasttag; /* last tag sent */ | |
140 | u16 useme; | |
141 | ulong lastwadj; /* last window adjustment */ | |
142 | int wpkts, rpkts; | |
9bb237b6 | 143 | int dataref; |
68e0d42f EC |
144 | }; |
145 | ||
1da177e4 LT |
146 | struct aoedev { |
147 | struct aoedev *next; | |
1da177e4 LT |
148 | ulong sysminor; |
149 | ulong aoemajor; | |
68e0d42f EC |
150 | u16 aoeminor; |
151 | u16 flags; | |
dced3a05 | 152 | u16 nopen; /* (bd_openers isn't available without sleeping) */ |
dced3a05 EC |
153 | u16 rttavg; /* round trip average of requests/responses */ |
154 | u16 mintimer; | |
1da177e4 LT |
155 | u16 fw_ver; /* version of blade's firmware */ |
156 | struct work_struct work;/* disk create work struct */ | |
157 | struct gendisk *gd; | |
165125e1 | 158 | struct request_queue blkq; |
1da177e4 LT |
159 | struct hd_geometry geo; |
160 | sector_t ssize; | |
161 | struct timer_list timer; | |
162 | spinlock_t lock; | |
e9bb8fb0 DM |
163 | struct sk_buff_head sendq; |
164 | struct sk_buff_head skbpool; | |
1da177e4 LT |
165 | mempool_t *bufpool; /* for deadlock-free Buf allocation */ |
166 | struct list_head bufq; /* queue of bios to work on */ | |
167 | struct buf *inprocess; /* the one we're currently working on */ | |
68e0d42f EC |
168 | struct aoetgt *targets[NTARGETS]; |
169 | struct aoetgt **tgt; /* target in use when working */ | |
170 | struct aoetgt **htgt; /* target needing rexmit assistance */ | |
1da177e4 LT |
171 | }; |
172 | ||
173 | ||
174 | int aoeblk_init(void); | |
175 | void aoeblk_exit(void); | |
176 | void aoeblk_gdalloc(void *); | |
177 | void aoedisk_rm_sysfs(struct aoedev *d); | |
178 | ||
179 | int aoechr_init(void); | |
180 | void aoechr_exit(void); | |
181 | void aoechr_error(char *); | |
182 | ||
183 | void aoecmd_work(struct aoedev *d); | |
3ae1c24e | 184 | void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); |
1da177e4 LT |
185 | void aoecmd_ata_rsp(struct sk_buff *); |
186 | void aoecmd_cfg_rsp(struct sk_buff *); | |
c4028958 | 187 | void aoecmd_sleepwork(struct work_struct *); |
68e0d42f EC |
188 | void aoecmd_cleanslate(struct aoedev *); |
189 | struct sk_buff *aoecmd_ata_id(struct aoedev *); | |
1da177e4 LT |
190 | |
191 | int aoedev_init(void); | |
192 | void aoedev_exit(void); | |
32465c65 | 193 | struct aoedev *aoedev_by_aoeaddr(int maj, int min); |
68e0d42f | 194 | struct aoedev *aoedev_by_sysminor_m(ulong sysminor); |
1da177e4 | 195 | void aoedev_downdev(struct aoedev *d); |
262bf541 | 196 | int aoedev_flush(const char __user *str, size_t size); |
1da177e4 LT |
197 | |
198 | int aoenet_init(void); | |
199 | void aoenet_exit(void); | |
e9bb8fb0 | 200 | void aoenet_xmit(struct sk_buff_head *); |
1da177e4 LT |
201 | int is_aoe_netif(struct net_device *ifp); |
202 | int set_aoe_iflist(const char __user *str, size_t size); | |
203 |