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 */
91 RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE,
92 RTTDEV_INIT = RTTAVG_INIT / 4,
106 struct list_head head;
108 struct timeval sent; /* high-res time packet was sent */
109 u32 sent_jiffs; /* low-res jiffies-based sent time */
112 struct aoetgt *t; /* parent target I belong to */
114 struct sk_buff *skb; /* command skb freed on module exit */
115 struct sk_buff *r_skb; /* response skb for async processing */
123 struct net_device *nd;
129 unsigned char addr[6];
130 ushort nframes; /* cap on frames to use */
131 struct aoedev *d; /* parent device I belong to */
132 struct list_head ffree; /* list of free frames */
133 struct aoeif ifs[NAOEIFS];
134 struct aoeif *ifp; /* current aoeif in use */
135 ushort nout; /* value of nout when skb was sent */
136 ushort maxout; /* current value for max outstanding */
137 ushort next_cwnd; /* incr maxout after decrementing to zero */
138 ushort ssthresh; /* slow start threshold */
139 ulong falloc; /* number of allocated frames */
148 u32 rttavg; /* scaled AoE round trip time average */
149 u32 rttdev; /* scaled round trip time mean deviation */
152 u16 nopen; /* (bd_openers isn't available without sleeping) */
153 u16 fw_ver; /* version of blade's firmware */
154 u16 lasttag; /* last tag sent */
157 struct work_struct work;/* disk create work struct */
159 struct request_queue *blkq;
160 struct hd_geometry geo;
162 struct timer_list timer;
164 struct sk_buff_head skbpool;
165 mempool_t *bufpool; /* for deadlock-free Buf allocation */
166 struct { /* pointers to work in progress */
172 struct list_head factive[NFACTIVE]; /* hash of active frames */
173 struct list_head rexmitq; /* deferred retransmissions */
174 struct aoetgt *targets[NTARGETS];
175 struct aoetgt **tgt; /* target in use when working */
176 struct aoetgt *htgt; /* target needing rexmit assistance */
182 /* kthread tracking */
184 struct completion rendez;
185 struct task_struct *task;
186 wait_queue_head_t *waitq;
192 int aoeblk_init(void);
193 void aoeblk_exit(void);
194 void aoeblk_gdalloc(void *);
195 void aoedisk_rm_sysfs(struct aoedev *d);
197 int aoechr_init(void);
198 void aoechr_exit(void);
199 void aoechr_error(char *);
201 void aoecmd_work(struct aoedev *d);
202 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
203 struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
204 void aoecmd_cfg_rsp(struct sk_buff *);
205 void aoecmd_sleepwork(struct work_struct *);
206 void aoecmd_wreset(struct aoetgt *t);
207 void aoecmd_cleanslate(struct aoedev *);
208 void aoecmd_exit(void);
209 int aoecmd_init(void);
210 struct sk_buff *aoecmd_ata_id(struct aoedev *);
211 void aoe_freetframe(struct frame *);
212 void aoe_flush_iocq(void);
213 void aoe_end_request(struct aoedev *, struct request *, int);
214 int aoe_ktstart(struct ktstate *k);
215 void aoe_ktstop(struct ktstate *k);
217 int aoedev_init(void);
218 void aoedev_exit(void);
219 struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
220 void aoedev_downdev(struct aoedev *d);
221 int aoedev_flush(const char __user *str, size_t size);
222 void aoe_failbuf(struct aoedev *, struct buf *);
223 void aoedev_put(struct aoedev *);
225 int aoenet_init(void);
226 void aoenet_exit(void);
227 void aoenet_xmit(struct sk_buff_head *);
228 int is_aoe_netif(struct net_device *ifp);
229 int set_aoe_iflist(const char __user *str, size_t size);