blob: 2248ab22657655b414b90f46350a88f08e637505 [file] [log] [blame]
Ed L. Cashin26114642006-09-20 14:36:48 -04001/* Copyright (c) 2006 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,
21
22 AOEFL_RSP = (1<<3),
23 AOEFL_ERR = (1<<2),
24
25 AOEAFL_EXT = (1<<6),
26 AOEAFL_DEV = (1<<4),
27 AOEAFL_ASYNC = (1<<1),
28 AOEAFL_WRITE = (1<<0),
29
30 AOECCMD_READ = 0,
31 AOECCMD_TEST,
32 AOECCMD_PTEST,
33 AOECCMD_SET,
34 AOECCMD_FSET,
35
36 AOE_HVER = 0x10,
37};
38
39struct aoe_hdr {
40 unsigned char dst[6];
41 unsigned char src[6];
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070042 __be16 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 unsigned char verfl;
44 unsigned char err;
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070045 __be16 major;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 unsigned char minor;
47 unsigned char cmd;
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070048 __be32 tag;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049};
50
51struct aoe_atahdr {
52 unsigned char aflags;
53 unsigned char errfeat;
54 unsigned char scnt;
55 unsigned char cmdstat;
56 unsigned char lba0;
57 unsigned char lba1;
58 unsigned char lba2;
59 unsigned char lba3;
60 unsigned char lba4;
61 unsigned char lba5;
62 unsigned char res[2];
63};
64
65struct aoe_cfghdr {
ecashin@coraid.com63e9cc52005-04-18 22:00:20 -070066 __be16 bufcnt;
67 __be16 fwver;
Ed L. Cashin19bf2632006-09-20 14:36:49 -040068 unsigned char scnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 unsigned char aoeccmd;
70 unsigned char cslen[2];
71};
72
73enum {
74 DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
75 DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
76 DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
77 DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */
Ed L. Cashin3ae1c242006-01-19 13:46:19 -050078 DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
Ed L. Cashin68e0d422008-02-08 04:20:00 -080079 DEVFL_KICKME = (1<<5), /* slow polling network card catch */
Ed L. Cashin3ae1c242006-01-19 13:46:19 -050080 DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 BUFFL_FAIL = 1,
83};
84
85enum {
Ed L. Cashin19bf2632006-09-20 14:36:49 -040086 DEFAULTBCNT = 2 * 512, /* 2 sectors */
Ed L Cashine39526e2005-08-19 16:54:43 -040087 NPERSHELF = 16, /* number of slots per shelf address */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 FREETAG = -1,
Ed L. Cashin68e0d422008-02-08 04:20:00 -080089 MIN_BUFS = 16,
90 NTARGETS = 8,
91 NAOEIFS = 8,
92
93 TIMERTICK = HZ / 10,
94 MINTIMER = HZ >> 2,
95 MAXTIMER = HZ << 1,
96 HELPWAIT = 20,
Linus Torvalds1da177e2005-04-16 15:20:36 -070097};
98
99struct buf {
100 struct list_head bufs;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800101 ulong stime; /* for disk stats */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 ulong flags;
103 ulong nframesout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 ulong resid;
105 ulong bv_resid;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800106 ulong bv_off;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 sector_t sector;
108 struct bio *bio;
109 struct bio_vec *bv;
110};
111
112struct frame {
113 int tag;
114 ulong waited;
115 struct buf *buf;
116 char *bufaddr;
Ed L. Cashin19bf2632006-09-20 14:36:49 -0400117 ulong bcnt;
118 sector_t lba;
Ed L. Cashine407a7f2006-09-20 14:36:49 -0400119 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120};
121
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800122struct aoeif {
123 struct net_device *nd;
124 unsigned char lost;
125 unsigned char lostjumbo;
126 ushort maxbcnt;
127};
128
129struct aoetgt {
130 unsigned char addr[6];
131 ushort nframes;
132 struct frame *frames;
133 struct aoeif ifs[NAOEIFS];
134 struct aoeif *ifp; /* current aoeif in use */
135 ushort nout;
136 ushort maxout;
137 u16 lasttag; /* last tag sent */
138 u16 useme;
139 ulong lastwadj; /* last window adjustment */
140 int wpkts, rpkts;
141};
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143struct aoedev {
144 struct aoedev *next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 ulong sysminor;
146 ulong aoemajor;
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800147 u16 aoeminor;
148 u16 flags;
Ed L. Cashindced3a02006-09-20 14:36:49 -0400149 u16 nopen; /* (bd_openers isn't available without sleeping) */
Ed L. Cashindced3a02006-09-20 14:36:49 -0400150 u16 rttavg; /* round trip average of requests/responses */
151 u16 mintimer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 u16 fw_ver; /* version of blade's firmware */
153 struct work_struct work;/* disk create work struct */
154 struct gendisk *gd;
Jens Axboe165125e2007-07-24 09:28:11 +0200155 struct request_queue blkq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 struct hd_geometry geo;
157 sector_t ssize;
158 struct timer_list timer;
159 spinlock_t lock;
ecashin@coraid.coma4b38362005-04-18 22:00:22 -0700160 struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
161 struct sk_buff *sendq_tl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 mempool_t *bufpool; /* for deadlock-free Buf allocation */
163 struct list_head bufq; /* queue of bios to work on */
164 struct buf *inprocess; /* the one we're currently working on */
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800165 struct aoetgt *targets[NTARGETS];
166 struct aoetgt **tgt; /* target in use when working */
167 struct aoetgt **htgt; /* target needing rexmit assistance */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168};
169
170
171int aoeblk_init(void);
172void aoeblk_exit(void);
173void aoeblk_gdalloc(void *);
174void aoedisk_rm_sysfs(struct aoedev *d);
175
176int aoechr_init(void);
177void aoechr_exit(void);
178void aoechr_error(char *);
179
180void aoecmd_work(struct aoedev *d);
Ed L. Cashin3ae1c242006-01-19 13:46:19 -0500181void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182void aoecmd_ata_rsp(struct sk_buff *);
183void aoecmd_cfg_rsp(struct sk_buff *);
David Howellsc4028952006-11-22 14:57:56 +0000184void aoecmd_sleepwork(struct work_struct *);
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800185void aoecmd_cleanslate(struct aoedev *);
186struct sk_buff *aoecmd_ata_id(struct aoedev *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188int aoedev_init(void);
189void aoedev_exit(void);
ecashin@coraid.com32465c62005-04-18 22:00:18 -0700190struct aoedev *aoedev_by_aoeaddr(int maj, int min);
Ed L. Cashin68e0d422008-02-08 04:20:00 -0800191struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192void aoedev_downdev(struct aoedev *d);
Ed L. Cashin3ae1c242006-01-19 13:46:19 -0500193int aoedev_isbusy(struct aoedev *d);
Ed L. Cashin262bf542008-02-08 04:20:03 -0800194int aoedev_flush(const char __user *str, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196int aoenet_init(void);
197void aoenet_exit(void);
198void aoenet_xmit(struct sk_buff *);
199int is_aoe_netif(struct net_device *ifp);
200int set_aoe_iflist(const char __user *str, size_t size);
201
Ed L. Cashin1eb0da42008-02-08 04:20:01 -0800202unsigned long long mac_addr(char addr[6]);