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

/* Copyright (c) 2006 Coraid, Inc.  See COPYING for GPL terms. */
#define VERSION "22"
#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 res;
	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_PAUSE = (1<<5),
	DEVFL_NEWSIZE = (1<<6),	/* need to update dev size in block layer */

	BUFFL_FAIL = 1,
};

enum {
	MAXATADATA = 1024,
	NPERSHELF = 16,		/* number of slots per shelf address */
	FREETAG = -1,
	MIN_BUFS = 8,
};

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

struct frame {
	int tag;
	ulong waited;
	struct buf *buf;
	char *bufaddr;
	int writedatalen;
	int ndata;

	/* largest possible */
	unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
};

struct aoedev {
	struct aoedev *next;
	unsigned char addr[6];	/* remote mac addr */
	ushort flags;
	ulong sysminor;
	ulong aoemajor;
	ulong aoeminor;
	ulong nopen;		/* (bd_openers isn't available without sleeping) */
	ulong rttavg;		/* round trip average of requests/responses */
	u16 fw_ver;		/* version of blade's firmware */
	struct work_struct work;/* disk create work struct */
	struct gendisk *gd;
	request_queue_t blkq;
	struct hd_geometry geo; 
	sector_t ssize;
	struct timer_list timer;
	spinlock_t lock;
	struct net_device *ifp;	/* interface ed is attached to */
	struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
	struct sk_buff *sendq_tl;
	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 */
	ulong lasttag;		/* last tag sent */
	ulong nframes;		/* number of frames below */
	struct frame *frames;
};


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(void *vp);

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, ulong bufcnt);
void aoedev_downdev(struct aoedev *d);
int aoedev_isbusy(struct aoedev *d);

int aoenet_init(void);
void aoenet_exit(void);
void aoenet_xmit(struct sk_buff *);
int is_aoe_netif(struct net_device *ifp);
int set_aoe_iflist(const char __user *str, size_t size);

u64 mac_addr(char addr[6]);
Commit	Line	Data
2611464d	1	/* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */
0fdf1096	2	#define VERSION "22"
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;
1da177e4 LT	68	unsigned char res;
	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 EC	78	DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
	79	DEVFL_PAUSE = (1<<5),
	80	DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
1da177e4 LT	81
	82	BUFFL_FAIL = 1,
	83	};
	84
	85	enum {
	86	MAXATADATA = 1024,
e39526e6	87	NPERSHELF = 16, /* number of slots per shelf address */
1da177e4 LT	88	FREETAG = -1,
	89	MIN_BUFS = 8,
	90	};
	91
	92	struct buf {
	93	struct list_head bufs;
0c6f0e79	94	ulong start_time; /* for disk stats */
1da177e4 LT	95	ulong flags;
	96	ulong nframesout;
	97	char *bufaddr;
	98	ulong resid;
	99	ulong bv_resid;
	100	sector_t sector;
	101	struct bio *bio;
	102	struct bio_vec *bv;
	103	};
	104
	105	struct frame {
	106	int tag;
	107	ulong waited;
	108	struct buf *buf;
	109	char *bufaddr;
	110	int writedatalen;
	111	int ndata;
	112
	113	/* largest possible */
	114	unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
	115	};
	116
	117	struct aoedev {
	118	struct aoedev *next;
	119	unsigned char addr[6]; /* remote mac addr */
	120	ushort flags;
	121	ulong sysminor;
	122	ulong aoemajor;
	123	ulong aoeminor;
	124	ulong nopen; /* (bd_openers isn't available without sleeping) */
	125	ulong rttavg; /* round trip average of requests/responses */
	126	u16 fw_ver; /* version of blade's firmware */
	127	struct work_struct work;/* disk create work struct */
	128	struct gendisk *gd;
	129	request_queue_t blkq;
	130	struct hd_geometry geo;
	131	sector_t ssize;
	132	struct timer_list timer;
	133	spinlock_t lock;
	134	struct net_device ifp; / interface ed is attached to */
a4b38364	135	struct sk_buff sendq_hd; / packets needing to be sent, list head */
a4b38364	136	struct sk_buff *sendq_tl;
1da177e4 LT	137	mempool_t bufpool; / for deadlock-free Buf allocation */
	138	struct list_head bufq; /* queue of bios to work on */
	139	struct buf inprocess; / the one we're currently working on */
	140	ulong lasttag; /* last tag sent */
	141	ulong nframes; /* number of frames below */
	142	struct frame *frames;
	143	};
	144
	145
	146	int aoeblk_init(void);
	147	void aoeblk_exit(void);
	148	void aoeblk_gdalloc(void *);
	149	void aoedisk_rm_sysfs(struct aoedev *d);
	150
	151	int aoechr_init(void);
	152	void aoechr_exit(void);
	153	void aoechr_error(char *);
	154
	155	void aoecmd_work(struct aoedev *d);
3ae1c24e	156	void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
1da177e4 LT	157	void aoecmd_ata_rsp(struct sk_buff *);
1da177e4 LT	158	void aoecmd_cfg_rsp(struct sk_buff *);
3ae1c24e	159	void aoecmd_sleepwork(void *vp);
1da177e4 LT	160
	161	int aoedev_init(void);
	162	void aoedev_exit(void);
32465c65	163	struct aoedev *aoedev_by_aoeaddr(int maj, int min);
3ae1c24e	164	struct aoedev *aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt);
1da177e4	165	void aoedev_downdev(struct aoedev *d);
3ae1c24e	166	int aoedev_isbusy(struct aoedev *d);
1da177e4 LT	167
	168	int aoenet_init(void);
	169	void aoenet_exit(void);
	170	void aoenet_xmit(struct sk_buff *);
	171	int is_aoe_netif(struct net_device *ifp);
	172	int set_aoe_iflist(const char __user *str, size_t size);
	173
	174	u64 mac_addr(char addr[6]);