tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
2#define VERSION "47"
3#define AOE_MAJOR 152
4#define DEVICE_NAME "aoe"
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 */
9#ifndef AOE_PARTITIONS
10#define AOE_PARTITIONS (16)
11#endif
12
13#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
14#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
15#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
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 __be16 type;
43 unsigned char verfl;
44 unsigned char err;
45 __be16 major;
46 unsigned char minor;
47 unsigned char cmd;
48 __be32 tag;
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 __be16 bufcnt;
67 __be16 fwver;
68 unsigned char scnt;
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_GDALLOC = (1<<4), /* need to alloc gendisk */
79 DEVFL_KICKME = (1<<5), /* slow polling network card catch */
80 DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
81
82 BUFFL_FAIL = 1,
83};
84
85enum {
86 DEFAULTBCNT = 2 * 512, /* 2 sectors */
87 NPERSHELF = 16, /* number of slots per shelf address */
88 FREETAG = -1,
89 MIN_BUFS = 16,
90 NTARGETS = 8,
91 NAOEIFS = 8,
92 NSKBPOOLMAX = 128,
93
94 TIMERTICK = HZ / 10,
95 MINTIMER = HZ >> 2,
96 MAXTIMER = HZ << 1,
97 HELPWAIT = 20,
98};
99
100struct buf {
101 struct list_head bufs;
102 ulong stime; /* for disk stats */
103 ulong flags;
104 ulong nframesout;
105 ulong resid;
106 ulong bv_resid;
107 ulong bv_off;
108 sector_t sector;
109 struct bio *bio;
110 struct bio_vec *bv;
111};
112
113struct frame {
114 int tag;
115 ulong waited;
116 struct buf *buf;
117 char *bufaddr;
118 ulong bcnt;
119 sector_t lba;
120 struct sk_buff *skb;
121};
122
123struct aoeif {
124 struct net_device *nd;
125 unsigned char lost;
126 unsigned char lostjumbo;
127 ushort maxbcnt;
128};
129
130struct aoetgt {
131 unsigned char addr[6];
132 ushort nframes;
133 struct frame *frames;
134 struct aoeif ifs[NAOEIFS];
135 struct aoeif *ifp; /* current aoeif in use */
136 ushort nout;
137 ushort maxout;
138 u16 lasttag; /* last tag sent */
139 u16 useme;
140 ulong lastwadj; /* last window adjustment */
141 int wpkts, rpkts;
142 int dataref;
143};
144
145struct aoedev {
146 struct aoedev *next;
147 ulong sysminor;
148 ulong aoemajor;
149 u16 aoeminor;
150 u16 flags;
151 u16 nopen; /* (bd_openers isn't available without sleeping) */
152 u16 rttavg; /* round trip average of requests/responses */
153 u16 mintimer;
154 u16 fw_ver; /* version of blade's firmware */
155 struct work_struct work;/* disk create work struct */
156 struct gendisk *gd;
157 struct request_queue blkq;
158 struct hd_geometry geo;
159 sector_t ssize;
160 struct timer_list timer;
161 spinlock_t lock;
162 struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
163 struct sk_buff *sendq_tl;
164 struct sk_buff *skbpool_hd;
165 struct sk_buff *skbpool_tl;
166 int nskbpool;
167 mempool_t *bufpool; /* for deadlock-free Buf allocation */
168 struct list_head bufq; /* queue of bios to work on */
169 struct buf *inprocess; /* the one we're currently working on */
170 struct aoetgt *targets[NTARGETS];
171 struct aoetgt **tgt; /* target in use when working */
172 struct aoetgt **htgt; /* target needing rexmit assistance */
173};
174
175
176int aoeblk_init(void);
177void aoeblk_exit(void);
178void aoeblk_gdalloc(void *);
179void aoedisk_rm_sysfs(struct aoedev *d);
180
181int aoechr_init(void);
182void aoechr_exit(void);
183void aoechr_error(char *);
184
185void aoecmd_work(struct aoedev *d);
186void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
187void aoecmd_ata_rsp(struct sk_buff *);
188void aoecmd_cfg_rsp(struct sk_buff *);
189void aoecmd_sleepwork(struct work_struct *);
190void aoecmd_cleanslate(struct aoedev *);
191struct sk_buff *aoecmd_ata_id(struct aoedev *);
192
193int aoedev_init(void);
194void aoedev_exit(void);
195struct aoedev *aoedev_by_aoeaddr(int maj, int min);
196struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
197void aoedev_downdev(struct aoedev *d);
198int aoedev_flush(const char __user *str, size_t size);
199
200int aoenet_init(void);
201void aoenet_exit(void);
202void aoenet_xmit(struct sk_buff *);
203int is_aoe_netif(struct net_device *ifp);
204int set_aoe_iflist(const char __user *str, size_t size);
205
206unsigned long long mac_addr(char addr[6]);