blob: db195abad69889e4d499bde162ff5e818601f3b2 [file] [log] [blame]
Ed L. Cashin52e112b2008-02-08 04:20:09 -08001/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
Ed L. Cashin8911ef42008-02-08 04:19:58 -08002#define VERSION "47"
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#define AOE_MAJOR 152
4#define DEVICE_NAME "aoe"
ecashin@coraid.comfc458dc2005-04-18 22:00:17 -07005
6/* set AOE_PARTITIONS to 1 to use whole-disks only
7 * default is 16, which is 15 partitions plus the whole disk
8 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#ifndef AOE_PARTITIONS
Ed L Cashine39526e2005-08-19 16:54:43 -040010#define AOE_PARTITIONS (16)
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#endif
ecashin@coraid.comfc458dc2005-04-18 22:00:17 -070012
Ed L Cashine39526e2005-08-19 16:54:43 -040013#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
14#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
15#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#define WHITESPACE " \t\v\f\n"
17
18enum {
19 AOECMD_ATA,
20 AOECMD_CFG,
Ed Cashinb6d6c512009-02-18 14:48:13 -080021 AOECMD_VEND_MIN = 0xf0,
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
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
40struct aoe_hdr {
41 unsigned char dst[6];
42 unsigned char src[6];
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070043 __be16 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 unsigned char verfl;
45 unsigned char err;
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070046 __be16 major;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 unsigned char minor;
48 unsigned char cmd;
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070049 __be32 tag;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
51
52struct 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
66struct aoe_cfghdr {
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070067 __be16 bufcnt;
68 __be16 fwver;
Ed L. Cashin19bf2632006-09-20 14:36:49 -040069 unsigned char scnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 unsigned char aoeccmd;
71 unsigned char cslen[2];
72};
73
74enum {
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 */
Ed L. Cashin3ae1c242006-01-19 13:46:19 -050079 DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
Ed L. Cashin68e0d422008-02-08 04:20:00 -080080 DEVFL_KICKME = (1<<5), /* slow polling network card catch */
Ed L. Cashin3ae1c242006-01-19 13:46:19 -050081 DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83 BUFFL_FAIL = 1,
84};
85
86enum {
Ed L. Cashin19bf2632006-09-20 14:36:49 -040087 DEFAULTBCNT = 2 * 512, /* 2 sectors */
Ed L Cashine39526e2005-08-19 16:54:43 -040088 NPERSHELF = 16, /* number of slots per shelf address */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 FREETAG = -1,
Ed L. Cashin68e0d422008-02-08 04:20:00 -080090 MIN_BUFS = 16,
91 NTARGETS = 8,
92 NAOEIFS = 8,
Ed L. Cashin9bb237b2008-02-08 04:20:05 -080093 NSKBPOOLMAX = 128,
Ed L. Cashin68e0d422008-02-08 04:20:00 -080094
95 TIMERTICK = HZ / 10,
96 MINTIMER = HZ >> 2,
97 MAXTIMER = HZ << 1,
98 HELPWAIT = 20,
Linus Torvalds1da177e2005-04-16 15:20:36 -070099};
100
101struct buf {
102 struct list_head bufs;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800103 ulong stime; /* for disk stats */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 ulong flags;
105 ulong nframesout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 ulong resid;
107 ulong bv_resid;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800108 ulong bv_off;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 sector_t sector;
110 struct bio *bio;
111 struct bio_vec *bv;
112};
113
114struct frame {
115 int tag;
116 ulong waited;
117 struct buf *buf;
118 char *bufaddr;
Ed L. Cashin19bf2632006-09-20 14:36:49 -0400119 ulong bcnt;
120 sector_t lba;
Ed L. Cashine407a7f2006-09-20 14:36:49 -0400121 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122};
123
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800124struct aoeif {
125 struct net_device *nd;
126 unsigned char lost;
127 unsigned char lostjumbo;
128 ushort maxbcnt;
129};
130
131struct 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;
Ed L. Cashin9bb237b2008-02-08 04:20:05 -0800143 int dataref;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800144};
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146struct aoedev {
147 struct aoedev *next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 ulong sysminor;
149 ulong aoemajor;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800150 u16 aoeminor;
151 u16 flags;
Ed L. Cashindced3a02006-09-20 14:36:49 -0400152 u16 nopen; /* (bd_openers isn't available without sleeping) */
Ed L. Cashindced3a02006-09-20 14:36:49 -0400153 u16 rttavg; /* round trip average of requests/responses */
154 u16 mintimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 u16 fw_ver; /* version of blade's firmware */
156 struct work_struct work;/* disk create work struct */
157 struct gendisk *gd;
Ed Cashin7135a71b2009-09-09 14:10:18 +0200158 struct request_queue *blkq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 struct hd_geometry geo;
160 sector_t ssize;
161 struct timer_list timer;
162 spinlock_t lock;
David S. Millere9bb8fb02008-09-21 22:36:49 -0700163 struct sk_buff_head sendq;
164 struct sk_buff_head skbpool;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 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 */
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800168 struct aoetgt *targets[NTARGETS];
169 struct aoetgt **tgt; /* target in use when working */
170 struct aoetgt **htgt; /* target needing rexmit assistance */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171};
172
173
174int aoeblk_init(void);
175void aoeblk_exit(void);
176void aoeblk_gdalloc(void *);
177void aoedisk_rm_sysfs(struct aoedev *d);
178
179int aoechr_init(void);
180void aoechr_exit(void);
181void aoechr_error(char *);
182
183void aoecmd_work(struct aoedev *d);
Ed L. Cashin3ae1c242006-01-19 13:46:19 -0500184void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185void aoecmd_ata_rsp(struct sk_buff *);
186void aoecmd_cfg_rsp(struct sk_buff *);
David Howellsc4028952006-11-22 14:57:56 +0000187void aoecmd_sleepwork(struct work_struct *);
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800188void aoecmd_cleanslate(struct aoedev *);
189struct sk_buff *aoecmd_ata_id(struct aoedev *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
191int aoedev_init(void);
192void aoedev_exit(void);
ecashin@coraid.com32465c62005-04-18 22:00:18 -0700193struct aoedev *aoedev_by_aoeaddr(int maj, int min);
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800194struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195void aoedev_downdev(struct aoedev *d);
Ed L. Cashin262bf542008-02-08 04:20:03 -0800196int aoedev_flush(const char __user *str, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198int aoenet_init(void);
199void aoenet_exit(void);
David S. Millere9bb8fb02008-09-21 22:36:49 -0700200void aoenet_xmit(struct sk_buff_head *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201int is_aoe_netif(struct net_device *ifp);
202int set_aoe_iflist(const char __user *str, size_t size);
203