[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,
	AOECMD_VEND_MIN = 0xf0,

	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,
b6d6c517	21	AOECMD_VEND_MIN = 0xf0,
1da177e4 LT	22
	23	AOEFL_RSP = (1<<3),
	24	AOEFL_ERR = (1<<2),
	25
	26	AOEAFL_EXT = (1<<6),
	27	AOEAFL_DEV = (1<<4),
	28	AOEAFL_ASYNC = (1<<1),
	29	AOEAFL_WRITE = (1<<0),
	30
	31	AOECCMD_READ = 0,
	32	AOECCMD_TEST,
	33	AOECCMD_PTEST,
	34	AOECCMD_SET,
	35	AOECCMD_FSET,
	36
	37	AOE_HVER = 0x10,
	38	};
	39
	40	struct aoe_hdr {
	41	unsigned char dst[6];
	42	unsigned char src[6];
63e9cc5d	43	__be16 type;
1da177e4 LT	44	unsigned char verfl;
1da177e4 LT	45	unsigned char err;
63e9cc5d	46	__be16 major;
1da177e4 LT	47	unsigned char minor;
1da177e4 LT	48	unsigned char cmd;
63e9cc5d	49	__be32 tag;
1da177e4 LT	50	};
	51
	52	struct aoe_atahdr {
	53	unsigned char aflags;
	54	unsigned char errfeat;
	55	unsigned char scnt;
	56	unsigned char cmdstat;
	57	unsigned char lba0;
	58	unsigned char lba1;
	59	unsigned char lba2;
	60	unsigned char lba3;
	61	unsigned char lba4;
	62	unsigned char lba5;
	63	unsigned char res[2];
	64	};
	65
	66	struct aoe_cfghdr {
63e9cc5d	67	__be16 bufcnt;
63e9cc5d	68	__be16 fwver;
19bf2635	69	unsigned char scnt;
1da177e4 LT	70	unsigned char aoeccmd;
	71	unsigned char cslen[2];
	72	};
	73
	74	enum {
	75	DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
	76	DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
	77	DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
	78	DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */
3ae1c24e	79	DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
68e0d42f	80	DEVFL_KICKME = (1<<5), /* slow polling network card catch */
3ae1c24e	81	DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
1da177e4 LT	82
	83	BUFFL_FAIL = 1,
	84	};
	85
	86	enum {
19bf2635	87	DEFAULTBCNT = 2 * 512, /* 2 sectors */
e39526e6	88	NPERSHELF = 16, /* number of slots per shelf address */
1da177e4	89	FREETAG = -1,
68e0d42f EC	90	MIN_BUFS = 16,
	91	NTARGETS = 8,
	92	NAOEIFS = 8,
9bb237b6	93	NSKBPOOLMAX = 128,
68e0d42f EC	94
	95	TIMERTICK = HZ / 10,
	96	MINTIMER = HZ >> 2,
	97	MAXTIMER = HZ << 1,
	98	HELPWAIT = 20,
1da177e4 LT	99	};
	100
	101	struct buf {
	102	struct list_head bufs;
68e0d42f	103	ulong stime; /* for disk stats */
1da177e4 LT	104	ulong flags;
1da177e4 LT	105	ulong nframesout;
1da177e4 LT	106	ulong resid;
1da177e4 LT	107	ulong bv_resid;
68e0d42f	108	ulong bv_off;
1da177e4 LT	109	sector_t sector;
	110	struct bio *bio;
	111	struct bio_vec *bv;
	112	};
	113
	114	struct frame {
	115	int tag;
	116	ulong waited;
	117	struct buf *buf;
	118	char *bufaddr;
19bf2635 EC	119	ulong bcnt;
19bf2635 EC	120	sector_t lba;
e407a7f6	121	struct sk_buff *skb;
1da177e4 LT	122	};
1da177e4 LT	123
68e0d42f EC	124	struct aoeif {
	125	struct net_device *nd;
	126	unsigned char lost;
	127	unsigned char lostjumbo;
	128	ushort maxbcnt;
	129	};
	130
	131	struct aoetgt {
	132	unsigned char addr[6];
	133	ushort nframes;
	134	struct frame *frames;
	135	struct aoeif ifs[NAOEIFS];
	136	struct aoeif ifp; / current aoeif in use */
	137	ushort nout;
	138	ushort maxout;
	139	u16 lasttag; /* last tag sent */
	140	u16 useme;
	141	ulong lastwadj; /* last window adjustment */
	142	int wpkts, rpkts;
9bb237b6	143	int dataref;
68e0d42f EC	144	};
68e0d42f EC	145
1da177e4 LT	146	struct aoedev {
1da177e4 LT	147	struct aoedev *next;
1da177e4 LT	148	ulong sysminor;
1da177e4 LT	149	ulong aoemajor;
68e0d42f EC	150	u16 aoeminor;
68e0d42f EC	151	u16 flags;
dced3a05	152	u16 nopen; /* (bd_openers isn't available without sleeping) */
dced3a05 EC	153	u16 rttavg; /* round trip average of requests/responses */
dced3a05 EC	154	u16 mintimer;
1da177e4 LT	155	u16 fw_ver; /* version of blade's firmware */
	156	struct work_struct work;/* disk create work struct */
	157	struct gendisk *gd;
165125e1	158	struct request_queue blkq;
1da177e4 LT	159	struct hd_geometry geo;
	160	sector_t ssize;
	161	struct timer_list timer;
	162	spinlock_t lock;
e9bb8fb0 DM	163	struct sk_buff_head sendq;
e9bb8fb0 DM	164	struct sk_buff_head skbpool;
1da177e4 LT	165	mempool_t bufpool; / for deadlock-free Buf allocation */
	166	struct list_head bufq; /* queue of bios to work on */
	167	struct buf inprocess; / the one we're currently working on */
68e0d42f EC	168	struct aoetgt *targets[NTARGETS];
	169	struct aoetgt *tgt; / target in use when working */
	170	struct aoetgt *htgt; / target needing rexmit assistance */
1da177e4 LT	171	};
	172
	173
	174	int aoeblk_init(void);
	175	void aoeblk_exit(void);
	176	void aoeblk_gdalloc(void *);
	177	void aoedisk_rm_sysfs(struct aoedev *d);
	178
	179	int aoechr_init(void);
	180	void aoechr_exit(void);
	181	void aoechr_error(char *);
	182
	183	void aoecmd_work(struct aoedev *d);
3ae1c24e	184	void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
1da177e4 LT	185	void aoecmd_ata_rsp(struct sk_buff *);
1da177e4 LT	186	void aoecmd_cfg_rsp(struct sk_buff *);
c4028958	187	void aoecmd_sleepwork(struct work_struct *);
68e0d42f EC	188	void aoecmd_cleanslate(struct aoedev *);
68e0d42f EC	189	struct sk_buff aoecmd_ata_id(struct aoedev );
1da177e4 LT	190
	191	int aoedev_init(void);
	192	void aoedev_exit(void);
32465c65	193	struct aoedev *aoedev_by_aoeaddr(int maj, int min);
68e0d42f	194	struct aoedev *aoedev_by_sysminor_m(ulong sysminor);
1da177e4	195	void aoedev_downdev(struct aoedev *d);
262bf541	196	int aoedev_flush(const char __user *str, size_t size);
1da177e4 LT	197
	198	int aoenet_init(void);
	199	void aoenet_exit(void);
e9bb8fb0	200	void aoenet_xmit(struct sk_buff_head *);
1da177e4 LT	201	int is_aoe_netif(struct net_device *ifp);
	202	int set_aoe_iflist(const char __user *str, size_t size);
	203