tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */
2#define VERSION "50"
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 WHITESPACE " \t\v\f\n"
14
15enum {
16 AOECMD_ATA,
17 AOECMD_CFG,
18 AOECMD_VEND_MIN = 0xf0,
19
20 AOEFL_RSP = (1<<3),
21 AOEFL_ERR = (1<<2),
22
23 AOEAFL_EXT = (1<<6),
24 AOEAFL_DEV = (1<<4),
25 AOEAFL_ASYNC = (1<<1),
26 AOEAFL_WRITE = (1<<0),
27
28 AOECCMD_READ = 0,
29 AOECCMD_TEST,
30 AOECCMD_PTEST,
31 AOECCMD_SET,
32 AOECCMD_FSET,
33
34 AOE_HVER = 0x10,
35};
36
37struct aoe_hdr {
38 unsigned char dst[6];
39 unsigned char src[6];
40 __be16 type;
41 unsigned char verfl;
42 unsigned char err;
43 __be16 major;
44 unsigned char minor;
45 unsigned char cmd;
46 __be32 tag;
47};
48
49struct aoe_atahdr {
50 unsigned char aflags;
51 unsigned char errfeat;
52 unsigned char scnt;
53 unsigned char cmdstat;
54 unsigned char lba0;
55 unsigned char lba1;
56 unsigned char lba2;
57 unsigned char lba3;
58 unsigned char lba4;
59 unsigned char lba5;
60 unsigned char res[2];
61};
62
63struct aoe_cfghdr {
64 __be16 bufcnt;
65 __be16 fwver;
66 unsigned char scnt;
67 unsigned char aoeccmd;
68 unsigned char cslen[2];
69};
70
71enum {
72 DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
73 DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
74 DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
75 DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */
76 DEVFL_KICKME = (1<<4), /* slow polling network card catch */
77 DEVFL_NEWSIZE = (1<<5), /* need to update dev size in block layer */
78};
79
80enum {
81 DEFAULTBCNT = 2 * 512, /* 2 sectors */
82 MIN_BUFS = 16,
83 NTARGETS = 8,
84 NAOEIFS = 8,
85 NSKBPOOLMAX = 256,
86 NFACTIVE = 61,
87
88 TIMERTICK = HZ / 10,
89 MINTIMER = HZ >> 2,
90 MAXTIMER = HZ << 1,
91};
92
93struct buf {
94 ulong nframesout;
95 ulong resid;
96 ulong bv_resid;
97 sector_t sector;
98 struct bio *bio;
99 struct bio_vec *bv;
100 struct request *rq;
101};
102
103struct frame {
104 struct list_head head;
105 u32 tag;
106 ulong waited;
107 struct aoetgt *t; /* parent target I belong to */
108 sector_t lba;
109 struct sk_buff *skb; /* command skb freed on module exit */
110 struct sk_buff *r_skb; /* response skb for async processing */
111 struct buf *buf;
112 struct bio_vec *bv;
113 ulong bcnt;
114 ulong bv_off;
115};
116
117struct aoeif {
118 struct net_device *nd;
119 ulong lost;
120 int bcnt;
121};
122
123struct aoetgt {
124 unsigned char addr[6];
125 ushort nframes;
126 struct aoedev *d; /* parent device I belong to */
127 struct list_head ffree; /* list of free frames */
128 struct aoeif ifs[NAOEIFS];
129 struct aoeif *ifp; /* current aoeif in use */
130 ushort nout;
131 ushort maxout;
132 ulong falloc;
133 ulong lastwadj; /* last window adjustment */
134 int minbcnt;
135 int wpkts, rpkts;
136};
137
138struct aoedev {
139 struct aoedev *next;
140 ulong sysminor;
141 ulong aoemajor;
142 u16 aoeminor;
143 u16 flags;
144 u16 nopen; /* (bd_openers isn't available without sleeping) */
145 u16 rttavg; /* round trip average of requests/responses */
146 u16 mintimer;
147 u16 fw_ver; /* version of blade's firmware */
148 u16 lasttag; /* last tag sent */
149 u16 useme;
150 ulong ref;
151 struct work_struct work;/* disk create work struct */
152 struct gendisk *gd;
153 struct request_queue *blkq;
154 struct hd_geometry geo;
155 sector_t ssize;
156 struct timer_list timer;
157 spinlock_t lock;
158 struct sk_buff_head skbpool;
159 mempool_t *bufpool; /* for deadlock-free Buf allocation */
160 struct { /* pointers to work in progress */
161 struct buf *buf;
162 struct bio *nxbio;
163 struct request *rq;
164 } ip;
165 ulong maxbcnt;
166 struct list_head factive[NFACTIVE]; /* hash of active frames */
167 struct aoetgt *targets[NTARGETS];
168 struct aoetgt **tgt; /* target in use when working */
169 struct aoetgt *htgt; /* target needing rexmit assistance */
170 ulong ntargets;
171 ulong kicked;
172};
173
174/* kthread tracking */
175struct ktstate {
176 struct completion rendez;
177 struct task_struct *task;
178 wait_queue_head_t *waitq;
179 int (*fn) (void);
180 char *name;
181 spinlock_t *lock;
182};
183
184int aoeblk_init(void);
185void aoeblk_exit(void);
186void aoeblk_gdalloc(void *);
187void aoedisk_rm_sysfs(struct aoedev *d);
188
189int aoechr_init(void);
190void aoechr_exit(void);
191void aoechr_error(char *);
192
193void aoecmd_work(struct aoedev *d);
194void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
195struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
196void aoecmd_cfg_rsp(struct sk_buff *);
197void aoecmd_sleepwork(struct work_struct *);
198void aoecmd_cleanslate(struct aoedev *);
199void aoecmd_exit(void);
200int aoecmd_init(void);
201struct sk_buff *aoecmd_ata_id(struct aoedev *);
202void aoe_freetframe(struct frame *);
203void aoe_flush_iocq(void);
204void aoe_end_request(struct aoedev *, struct request *, int);
205int aoe_ktstart(struct ktstate *k);
206void aoe_ktstop(struct ktstate *k);
207
208int aoedev_init(void);
209void aoedev_exit(void);
210struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
211void aoedev_downdev(struct aoedev *d);
212int aoedev_flush(const char __user *str, size_t size);
213void aoe_failbuf(struct aoedev *, struct buf *);
214void aoedev_put(struct aoedev *);
215
216int aoenet_init(void);
217void aoenet_exit(void);
218void aoenet_xmit(struct sk_buff_head *);
219int is_aoe_netif(struct net_device *ifp);
220int set_aoe_iflist(const char __user *str, size_t size);