1 /* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */
4 #define DEVICE_NAME "aoe"
6 /* set AOE_PARTITIONS to 1 to use whole-disks only
7 * default is 16, which is 15 partitions plus the whole disk
10 #define AOE_PARTITIONS (16)
13 #define WHITESPACE " \t\v\f\n"
18 AOECMD_VEND_MIN = 0xf0,
25 AOEAFL_ASYNC = (1<<1),
26 AOEAFL_WRITE = (1<<0),
51 unsigned char errfeat;
53 unsigned char cmdstat;
67 unsigned char aoeccmd;
68 unsigned char cslen[2];
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 */
81 DEFAULTBCNT = 2 * 512, /* 2 sectors */
92 RTTAVG_INIT = HZ / 4 << RTTSCALE,
93 RTTDEV_INIT = RTTAVG_INIT / 4,
107 struct list_head head;
110 struct aoetgt *t; /* parent target I belong to */
112 struct sk_buff *skb; /* command skb freed on module exit */
113 struct sk_buff *r_skb; /* response skb for async processing */
121 struct net_device *nd;
127 unsigned char addr[6];
128 ushort nframes; /* cap on frames to use */
129 struct aoedev *d; /* parent device I belong to */
130 struct list_head ffree; /* list of free frames */
131 struct aoeif ifs[NAOEIFS];
132 struct aoeif *ifp; /* current aoeif in use */
133 ushort nout; /* value of nout when skb was sent */
134 ushort maxout; /* current value for max outstanding */
135 ushort next_cwnd; /* incr maxout after decrementing to zero */
136 ushort ssthresh; /* slow start threshold */
137 ulong falloc; /* number of allocated frames */
148 u16 nopen; /* (bd_openers isn't available without sleeping) */
149 u16 rttavg; /* scaled AoE round trip time average */
150 u16 rttdev; /* scaled round trip time mean deviation */
151 u16 fw_ver; /* version of blade's firmware */
152 u16 lasttag; /* last tag sent */
155 struct work_struct work;/* disk create work struct */
157 struct request_queue *blkq;
158 struct hd_geometry geo;
160 struct timer_list timer;
162 struct sk_buff_head skbpool;
163 mempool_t *bufpool; /* for deadlock-free Buf allocation */
164 struct { /* pointers to work in progress */
170 struct list_head factive[NFACTIVE]; /* hash of active frames */
171 struct list_head rexmitq; /* deferred retransmissions */
172 struct aoetgt *targets[NTARGETS];
173 struct aoetgt **tgt; /* target in use when working */
174 struct aoetgt *htgt; /* target needing rexmit assistance */
180 /* kthread tracking */
182 struct completion rendez;
183 struct task_struct *task;
184 wait_queue_head_t *waitq;
190 int aoeblk_init(void);
191 void aoeblk_exit(void);
192 void aoeblk_gdalloc(void *);
193 void aoedisk_rm_sysfs(struct aoedev *d);
195 int aoechr_init(void);
196 void aoechr_exit(void);
197 void aoechr_error(char *);
199 void aoecmd_work(struct aoedev *d);
200 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
201 struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
202 void aoecmd_cfg_rsp(struct sk_buff *);
203 void aoecmd_sleepwork(struct work_struct *);
204 void aoecmd_wreset(struct aoetgt *t);
205 void aoecmd_cleanslate(struct aoedev *);
206 void aoecmd_exit(void);
207 int aoecmd_init(void);
208 struct sk_buff *aoecmd_ata_id(struct aoedev *);
209 void aoe_freetframe(struct frame *);
210 void aoe_flush_iocq(void);
211 void aoe_end_request(struct aoedev *, struct request *, int);
212 int aoe_ktstart(struct ktstate *k);
213 void aoe_ktstop(struct ktstate *k);
215 int aoedev_init(void);
216 void aoedev_exit(void);
217 struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
218 void aoedev_downdev(struct aoedev *d);
219 int aoedev_flush(const char __user *str, size_t size);
220 void aoe_failbuf(struct aoedev *, struct buf *);
221 void aoedev_put(struct aoedev *);
223 int aoenet_init(void);
224 void aoenet_exit(void);
225 void aoenet_xmit(struct sk_buff_head *);
226 int is_aoe_netif(struct net_device *ifp);
227 int set_aoe_iflist(const char __user *str, size_t size);