blob: ae16a21aca5cae6f6920515ee814c2a3c9e3a811 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
2#define VERSION "5"
3#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
10#define AOE_PARTITIONS 16
11#endif
ecashin@coraid.comfc458dc2005-04-18 22:00:17 -070012
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * 10 + (aoeminor))
14#define AOEMAJOR(sysminor) ((sysminor) / 10)
15#define AOEMINOR(sysminor) ((sysminor) % 10)
16#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];
42 unsigned char type[2];
43 unsigned char verfl;
44 unsigned char err;
45 unsigned char major[2];
46 unsigned char minor;
47 unsigned char cmd;
48 unsigned char tag[4];
49};
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 {
66 unsigned char bufcnt[2];
67 unsigned char fwver[2];
68 unsigned char res;
69 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 */
78 DEVFL_WC_UPDATE = (1<<4), /* this device needs to update write cache status */
79 DEVFL_WORKON = (1<<4),
80
81 BUFFL_FAIL = 1,
82};
83
84enum {
85 MAXATADATA = 1024,
86 NPERSHELF = 10,
87 FREETAG = -1,
88 MIN_BUFS = 8,
89};
90
91struct buf {
92 struct list_head bufs;
93 ulong flags;
94 ulong nframesout;
95 char *bufaddr;
96 ulong resid;
97 ulong bv_resid;
98 sector_t sector;
99 struct bio *bio;
100 struct bio_vec *bv;
101};
102
103struct frame {
104 int tag;
105 ulong waited;
106 struct buf *buf;
107 char *bufaddr;
108 int writedatalen;
109 int ndata;
110
111 /* largest possible */
112 unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
113};
114
115struct aoedev {
116 struct aoedev *next;
117 unsigned char addr[6]; /* remote mac addr */
118 ushort flags;
119 ulong sysminor;
120 ulong aoemajor;
121 ulong aoeminor;
122 ulong nopen; /* (bd_openers isn't available without sleeping) */
123 ulong rttavg; /* round trip average of requests/responses */
124 u16 fw_ver; /* version of blade's firmware */
125 struct work_struct work;/* disk create work struct */
126 struct gendisk *gd;
127 request_queue_t blkq;
128 struct hd_geometry geo;
129 sector_t ssize;
130 struct timer_list timer;
131 spinlock_t lock;
132 struct net_device *ifp; /* interface ed is attached to */
133 struct sk_buff *skblist;/* packets needing to be sent */
134 mempool_t *bufpool; /* for deadlock-free Buf allocation */
135 struct list_head bufq; /* queue of bios to work on */
136 struct buf *inprocess; /* the one we're currently working on */
137 ulong lasttag; /* last tag sent */
138 ulong nframes; /* number of frames below */
139 struct frame *frames;
140};
141
142
143int aoeblk_init(void);
144void aoeblk_exit(void);
145void aoeblk_gdalloc(void *);
146void aoedisk_rm_sysfs(struct aoedev *d);
147
148int aoechr_init(void);
149void aoechr_exit(void);
150void aoechr_error(char *);
151
152void aoecmd_work(struct aoedev *d);
153void aoecmd_cfg(ushort, unsigned char);
154void aoecmd_ata_rsp(struct sk_buff *);
155void aoecmd_cfg_rsp(struct sk_buff *);
156
157int aoedev_init(void);
158void aoedev_exit(void);
ecashin@coraid.com32465c62005-04-18 22:00:18 -0700159struct aoedev *aoedev_by_aoeaddr(int maj, int min);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160void aoedev_downdev(struct aoedev *d);
161struct aoedev *aoedev_set(ulong, unsigned char *, struct net_device *, ulong);
162int aoedev_busy(void);
163
164int aoenet_init(void);
165void aoenet_exit(void);
166void aoenet_xmit(struct sk_buff *);
167int is_aoe_netif(struct net_device *ifp);
168int set_aoe_iflist(const char __user *str, size_t size);
169
170u64 mac_addr(char addr[6]);