[linux-2.6-block.git] / drivers / block / aoe / aoe.h

/* Copyright (c) 2007 Coraid, Inc.  See COPYING for GPL terms. */
#define VERSION "47"
#define AOE_MAJOR 152
#define DEVICE_NAME "aoe"

/* set AOE_PARTITIONS to 1 to use whole-disks only
 * default is 16, which is 15 partitions plus the whole disk
 */
#ifndef AOE_PARTITIONS
#define AOE_PARTITIONS (16)
#endif

#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
#define WHITESPACE " \t\v\f\n"

enum {
	AOECMD_ATA,
	AOECMD_CFG,

	AOEFL_RSP = (1<<3),
	AOEFL_ERR = (1<<2),

	AOEAFL_EXT = (1<<6),
	AOEAFL_DEV = (1<<4),
	AOEAFL_ASYNC = (1<<1),
	AOEAFL_WRITE = (1<<0),

	AOECCMD_READ = 0,
	AOECCMD_TEST,
	AOECCMD_PTEST,
	AOECCMD_SET,
	AOECCMD_FSET,

	AOE_HVER = 0x10,
};

struct aoe_hdr {
	unsigned char dst[6];
	unsigned char src[6];
	__be16 type;
	unsigned char verfl;
	unsigned char err;
	__be16 major;
	unsigned char minor;
	unsigned char cmd;
	__be32 tag;
};

struct aoe_atahdr {
	unsigned char aflags;
	unsigned char errfeat;
	unsigned char scnt;
	unsigned char cmdstat;
	unsigned char lba0;
	unsigned char lba1;
	unsigned char lba2;
	unsigned char lba3;
	unsigned char lba4;
	unsigned char lba5;
	unsigned char res[2];
};

struct aoe_cfghdr {
	__be16 bufcnt;
	__be16 fwver;
	unsigned char scnt;
	unsigned char aoeccmd;
	unsigned char cslen[2];
};

enum {
	DEVFL_UP = 1,	/* device is installed in system and ready for AoE->ATA commands */
	DEVFL_TKILL = (1<<1),	/* flag for timer to know when to kill self */
	DEVFL_EXT = (1<<2),	/* device accepts lba48 commands */
	DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */
	DEVFL_GDALLOC = (1<<4),	/* need to alloc gendisk */
	DEVFL_KICKME = (1<<5),	/* slow polling network card catch */
	DEVFL_NEWSIZE = (1<<6),	/* need to update dev size in block layer */

	BUFFL_FAIL = 1,
};

enum {
	DEFAULTBCNT = 2 * 512,	/* 2 sectors */
	NPERSHELF = 16,		/* number of slots per shelf address */
	FREETAG = -1,
	MIN_BUFS = 16,
	NTARGETS = 8,
	NAOEIFS = 8,
	NSKBPOOLMAX = 128,

	TIMERTICK = HZ / 10,
	MINTIMER = HZ >> 2,
	MAXTIMER = HZ << 1,
	HELPWAIT = 20,
};

struct buf {
	struct list_head bufs;
	ulong stime;	/* for disk stats */
	ulong flags;
	ulong nframesout;
	ulong resid;
	ulong bv_resid;
	ulong bv_off;
	sector_t sector;
	struct bio *bio;
	struct bio_vec *bv;
};

struct frame {
	int tag;
	ulong waited;
	struct buf *buf;
	char *bufaddr;
	ulong bcnt;
	sector_t lba;
	struct sk_buff *skb;
};

struct aoeif {
	struct net_device *nd;
	unsigned char lost;
	unsigned char lostjumbo;
	ushort maxbcnt;
};

struct aoetgt {
	unsigned char addr[6];
	ushort nframes;
	struct frame *frames;
	struct aoeif ifs[NAOEIFS];
	struct aoeif *ifp;	/* current aoeif in use */
	ushort nout;
	ushort maxout;
	u16 lasttag;		/* last tag sent */
	u16 useme;
	ulong lastwadj;		/* last window adjustment */
	int wpkts, rpkts;
	int dataref;
};

struct aoedev {
	struct aoedev *next;
	ulong sysminor;
	ulong aoemajor;
	u16 aoeminor;
	u16 flags;
	u16 nopen;		/* (bd_openers isn't available without sleeping) */
	u16 rttavg;		/* round trip average of requests/responses */
	u16 mintimer;
	u16 fw_ver;		/* version of blade's firmware */
	struct work_struct work;/* disk create work struct */
	struct gendisk *gd;
	struct request_queue blkq;
	struct hd_geometry geo; 
	sector_t ssize;
	struct timer_list timer;
	spinlock_t lock;
	struct sk_buff_head sendq;
	struct sk_buff_head skbpool;
	mempool_t *bufpool;	/* for deadlock-free Buf allocation */
	struct list_head bufq;	/* queue of bios to work on */
	struct buf *inprocess;	/* the one we're currently working on */
	struct aoetgt *targets[NTARGETS];
	struct aoetgt **tgt;	/* target in use when working */
	struct aoetgt **htgt;	/* target needing rexmit assistance */
};


int aoeblk_init(void);
void aoeblk_exit(void);
void aoeblk_gdalloc(void *);
void aoedisk_rm_sysfs(struct aoedev *d);

int aoechr_init(void);
void aoechr_exit(void);
void aoechr_error(char *);

void aoecmd_work(struct aoedev *d);
void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
void aoecmd_ata_rsp(struct sk_buff *);
void aoecmd_cfg_rsp(struct sk_buff *);
void aoecmd_sleepwork(struct work_struct *);
void aoecmd_cleanslate(struct aoedev *);
struct sk_buff *aoecmd_ata_id(struct aoedev *);

int aoedev_init(void);
void aoedev_exit(void);
struct aoedev *aoedev_by_aoeaddr(int maj, int min);
struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
void aoedev_downdev(struct aoedev *d);
int aoedev_flush(const char __user *str, size_t size);

int aoenet_init(void);
void aoenet_exit(void);
void aoenet_xmit(struct sk_buff_head *);
int is_aoe_netif(struct net_device *ifp);
int set_aoe_iflist(const char __user *str, size_t size);
Commit	Line	Data
52e112b3	1	/* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
8911ef4d	2	#define VERSION "47"
1da177e4 LT	3	#define AOE_MAJOR 152
1da177e4 LT	4	#define DEVICE_NAME "aoe"
fc458dcd	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	*/
1da177e4	9	#ifndef AOE_PARTITIONS
e39526e6	10	#define AOE_PARTITIONS (16)
1da177e4	11	#endif
fc458dcd	12
e39526e6 EC	13	#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
	14	#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
	15	#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
1da177e4 LT	16	#define WHITESPACE " \t\v\f\n"
	17
	18	enum {
	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
	39	struct aoe_hdr {
	40	unsigned char dst[6];
	41	unsigned char src[6];
63e9cc5d	42	__be16 type;
1da177e4 LT	43	unsigned char verfl;
1da177e4 LT	44	unsigned char err;
63e9cc5d	45	__be16 major;
1da177e4 LT	46	unsigned char minor;
1da177e4 LT	47	unsigned char cmd;
63e9cc5d	48	__be32 tag;
1da177e4 LT	49	};
	50
	51	struct 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
	65	struct aoe_cfghdr {
63e9cc5d	66	__be16 bufcnt;
63e9cc5d	67	__be16 fwver;
19bf2635	68	unsigned char scnt;
1da177e4 LT	69	unsigned char aoeccmd;
	70	unsigned char cslen[2];
	71	};
	72
	73	enum {
	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 */
3ae1c24e	78	DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
68e0d42f	79	DEVFL_KICKME = (1<<5), /* slow polling network card catch */
3ae1c24e	80	DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
1da177e4 LT	81
	82	BUFFL_FAIL = 1,
	83	};
	84
	85	enum {
19bf2635	86	DEFAULTBCNT = 2 * 512, /* 2 sectors */
e39526e6	87	NPERSHELF = 16, /* number of slots per shelf address */
1da177e4	88	FREETAG = -1,
68e0d42f EC	89	MIN_BUFS = 16,
	90	NTARGETS = 8,
	91	NAOEIFS = 8,
9bb237b6	92	NSKBPOOLMAX = 128,
68e0d42f EC	93
	94	TIMERTICK = HZ / 10,
	95	MINTIMER = HZ >> 2,
	96	MAXTIMER = HZ << 1,
	97	HELPWAIT = 20,
1da177e4 LT	98	};
	99
	100	struct buf {
	101	struct list_head bufs;
68e0d42f	102	ulong stime; /* for disk stats */
1da177e4 LT	103	ulong flags;
1da177e4 LT	104	ulong nframesout;
1da177e4 LT	105	ulong resid;
1da177e4 LT	106	ulong bv_resid;
68e0d42f	107	ulong bv_off;
1da177e4 LT	108	sector_t sector;
	109	struct bio *bio;
	110	struct bio_vec *bv;
	111	};
	112
	113	struct frame {
	114	int tag;
	115	ulong waited;
	116	struct buf *buf;
	117	char *bufaddr;
19bf2635 EC	118	ulong bcnt;
19bf2635 EC	119	sector_t lba;
e407a7f6	120	struct sk_buff *skb;
1da177e4 LT	121	};
1da177e4 LT	122
68e0d42f EC	123	struct aoeif {
	124	struct net_device *nd;
	125	unsigned char lost;
	126	unsigned char lostjumbo;
	127	ushort maxbcnt;
	128	};
	129
	130	struct 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;
9bb237b6	142	int dataref;
68e0d42f EC	143	};
68e0d42f EC	144
1da177e4 LT	145	struct aoedev {
1da177e4 LT	146	struct aoedev *next;
1da177e4 LT	147	ulong sysminor;
1da177e4 LT	148	ulong aoemajor;
68e0d42f EC	149	u16 aoeminor;
68e0d42f EC	150	u16 flags;
dced3a05	151	u16 nopen; /* (bd_openers isn't available without sleeping) */
dced3a05 EC	152	u16 rttavg; /* round trip average of requests/responses */
dced3a05 EC	153	u16 mintimer;
1da177e4 LT	154	u16 fw_ver; /* version of blade's firmware */
	155	struct work_struct work;/* disk create work struct */
	156	struct gendisk *gd;
165125e1	157	struct request_queue blkq;
1da177e4 LT	158	struct hd_geometry geo;
	159	sector_t ssize;
	160	struct timer_list timer;
	161	spinlock_t lock;
e9bb8fb0 DM	162	struct sk_buff_head sendq;
e9bb8fb0 DM	163	struct sk_buff_head skbpool;
1da177e4 LT	164	mempool_t bufpool; / for deadlock-free Buf allocation */
	165	struct list_head bufq; /* queue of bios to work on */
	166	struct buf inprocess; / the one we're currently working on */
68e0d42f EC	167	struct aoetgt *targets[NTARGETS];
	168	struct aoetgt *tgt; / target in use when working */
	169	struct aoetgt *htgt; / target needing rexmit assistance */
1da177e4 LT	170	};
	171
	172
	173	int aoeblk_init(void);
	174	void aoeblk_exit(void);
	175	void aoeblk_gdalloc(void *);
	176	void aoedisk_rm_sysfs(struct aoedev *d);
	177
	178	int aoechr_init(void);
	179	void aoechr_exit(void);
	180	void aoechr_error(char *);
	181
	182	void aoecmd_work(struct aoedev *d);
3ae1c24e	183	void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
1da177e4 LT	184	void aoecmd_ata_rsp(struct sk_buff *);
1da177e4 LT	185	void aoecmd_cfg_rsp(struct sk_buff *);
c4028958	186	void aoecmd_sleepwork(struct work_struct *);
68e0d42f EC	187	void aoecmd_cleanslate(struct aoedev *);
68e0d42f EC	188	struct sk_buff aoecmd_ata_id(struct aoedev );
1da177e4 LT	189
	190	int aoedev_init(void);
	191	void aoedev_exit(void);
32465c65	192	struct aoedev *aoedev_by_aoeaddr(int maj, int min);
68e0d42f	193	struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
1da177e4	194	void aoedev_downdev(struct aoedev *d);
262bf541	195	int aoedev_flush(const char __user *str, size_t size);
1da177e4 LT	196
	197	int aoenet_init(void);
	198	void aoenet_exit(void);
e9bb8fb0	199	void aoenet_xmit(struct sk_buff_head *);
1da177e4 LT	200	int is_aoe_netif(struct net_device *ifp);
	201	int set_aoe_iflist(const char __user *str, size_t size);
	202