1 /* Copyright (c) 2013 Coraid, Inc. See COPYING for GPL terms. */
2 #include <linux/blk-mq.h>
6 #define DEVICE_NAME "aoe"
8 /* set AOE_PARTITIONS to 1 to use whole-disks only
9 * default is 16, which is 15 partitions plus the whole disk
11 #ifndef AOE_PARTITIONS
12 #define AOE_PARTITIONS (16)
15 #define WHITESPACE " \t\v\f\n,"
20 AOECMD_VEND_MIN = 0xf0,
27 AOEAFL_ASYNC = (1<<1),
28 AOEAFL_WRITE = (1<<0),
53 unsigned char errfeat;
55 unsigned char cmdstat;
69 unsigned char aoeccmd;
70 unsigned char cslen[2];
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_GDALLOC = (1<<3), /* need to alloc gendisk */
78 DEVFL_GD_NOW = (1<<4), /* allocating 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 DEVFL_FREEING = (1<<7), /* set when device is being cleaned up */
82 DEVFL_FREED = (1<<8), /* device has been cleaned up */
86 DEFAULTBCNT = 2 * 512, /* 2 sectors */
96 RTTAVG_INIT = USEC_PER_SEC / 4 << RTTSCALE,
97 RTTDEV_INIT = RTTAVG_INIT / 4,
99 HARD_SCORN_SECS = 10, /* try another remote port after this */
100 MAX_TAINT = 1000, /* cap on aoetgt taint */
104 unsigned long nr_bios;
110 struct bvec_iter iter;
119 struct list_head head;
121 ktime_t sent; /* high-res time packet was sent */
124 struct aoetgt *t; /* parent target I belong to */
125 struct sk_buff *skb; /* command skb freed on module exit */
126 struct sk_buff *r_skb; /* response skb for async processing */
128 struct bvec_iter iter;
133 struct net_device *nd;
139 unsigned char addr[6];
140 ushort nframes; /* cap on frames to use */
141 struct aoedev *d; /* parent device I belong to */
142 struct list_head ffree; /* list of free frames */
143 struct aoeif ifs[NAOEIFS];
144 struct aoeif *ifp; /* current aoeif in use */
145 ushort nout; /* number of AoE commands outstanding */
146 ushort maxout; /* current value for max outstanding */
147 ushort next_cwnd; /* incr maxout after decrementing to zero */
148 ushort ssthresh; /* slow start threshold */
149 ulong falloc; /* number of allocated frames */
150 int taint; /* how much we want to avoid this aoetgt */
160 u32 rttavg; /* scaled AoE round trip time average */
161 u32 rttdev; /* scaled round trip time mean deviation */
164 u16 nopen; /* (bd_openers isn't available without sleeping) */
165 u16 fw_ver; /* version of blade's firmware */
166 u16 lasttag; /* last tag sent */
169 struct work_struct work;/* disk create work struct */
171 struct dentry *debugfs;
172 struct request_queue *blkq;
173 struct list_head rq_list;
174 struct blk_mq_tag_set tag_set;
175 struct hd_geometry geo;
177 struct timer_list timer;
179 struct sk_buff_head skbpool;
180 mempool_t *bufpool; /* for deadlock-free Buf allocation */
181 struct { /* pointers to work in progress */
187 struct list_head factive[NFACTIVE]; /* hash of active frames */
188 struct list_head rexmitq; /* deferred retransmissions */
189 struct aoetgt **targets;
190 ulong ntargets; /* number of allocated aoetgt pointers */
191 struct aoetgt **tgt; /* target in use when working */
196 /* kthread tracking */
198 struct completion rendez;
199 struct task_struct *task;
200 wait_queue_head_t *waitq;
208 int aoeblk_init(void);
209 void aoeblk_exit(void);
210 void aoeblk_gdalloc(void *);
211 void aoedisk_rm_debugfs(struct aoedev *d);
213 int aoechr_init(void);
214 void aoechr_exit(void);
215 void aoechr_error(char *);
217 void aoecmd_work(struct aoedev *d);
218 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
219 struct sk_buff *aoecmd_ata_rsp(struct sk_buff *);
220 void aoecmd_cfg_rsp(struct sk_buff *);
221 void aoecmd_sleepwork(struct work_struct *);
222 void aoecmd_wreset(struct aoetgt *t);
223 void aoecmd_cleanslate(struct aoedev *);
224 void aoecmd_exit(void);
225 int aoecmd_init(void);
226 struct sk_buff *aoecmd_ata_id(struct aoedev *);
227 void aoe_freetframe(struct frame *);
228 void aoe_flush_iocq(void);
229 void aoe_flush_iocq_by_index(int);
230 void aoe_end_request(struct aoedev *, struct request *, int);
231 int aoe_ktstart(struct ktstate *k);
232 void aoe_ktstop(struct ktstate *k);
234 int aoedev_init(void);
235 void aoedev_exit(void);
236 struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc);
237 void aoedev_downdev(struct aoedev *d);
238 int aoedev_flush(const char __user *str, size_t size);
239 void aoe_failbuf(struct aoedev *, struct buf *);
240 void aoedev_put(struct aoedev *);
242 int aoenet_init(void);
243 void aoenet_exit(void);
244 void aoenet_xmit(struct sk_buff_head *);
245 int is_aoe_netif(struct net_device *ifp);
246 int set_aoe_iflist(const char __user *str, size_t size);