[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 xprintk(L, fmt, arg...) printk(L "aoe: " "%s: " fmt, __func__, ## arg)
#define iprintk(fmt, arg...) xprintk(KERN_INFO, fmt, ## arg)
#define eprintk(fmt, arg...) xprintk(KERN_ERR, fmt, ## arg)
#define dprintk(fmt, arg...) xprintk(KERN_DEBUG, fmt, ## arg)

#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_PAUSE = (1<<5),
	DEVFL_NEWSIZE = (1<<6),	/* need to update dev size in block layer */
	DEVFL_MAXBCNT = (1<<7), /* d->maxbcnt is not changeable */

	BUFFL_FAIL = 1,
};

enum {
	DEFAULTBCNT = 2 * 512,	/* 2 sectors */
	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;
	ulong bcnt;
	sector_t lba;
	struct sk_buff *skb;
};

struct aoedev {
	struct aoedev *next;
	unsigned char addr[6];	/* remote mac addr */
	ushort flags;
	ulong sysminor;
	ulong aoemajor;
	ulong aoeminor;
	u16 nopen;		/* (bd_openers isn't available without sleeping) */
	u16 lasttag;		/* last tag sent */
	u16 rttavg;		/* round trip average of requests/responses */
	u16 mintimer;
	u16 fw_ver;		/* version of blade's firmware */
	u16 maxbcnt;
	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 */
	ushort lostjumbo;
	ushort 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);
struct sk_buff *new_skb(ulong);

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
6bb6285f EC	13	#define xprintk(L, fmt, arg...) printk(L "aoe: " "%s: " fmt, __func__, ## arg)
	14	#define iprintk(fmt, arg...) xprintk(KERN_INFO, fmt, ## arg)
	15	#define eprintk(fmt, arg...) xprintk(KERN_ERR, fmt, ## arg)
	16	#define dprintk(fmt, arg...) xprintk(KERN_DEBUG, fmt, ## arg)
	17
e39526e6 EC	18	#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
	19	#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
	20	#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
1da177e4 LT	21	#define WHITESPACE " \t\v\f\n"
	22
	23	enum {
	24	AOECMD_ATA,
	25	AOECMD_CFG,
	26
	27	AOEFL_RSP = (1<<3),
	28	AOEFL_ERR = (1<<2),
	29
	30	AOEAFL_EXT = (1<<6),
	31	AOEAFL_DEV = (1<<4),
	32	AOEAFL_ASYNC = (1<<1),
	33	AOEAFL_WRITE = (1<<0),
	34
	35	AOECCMD_READ = 0,
	36	AOECCMD_TEST,
	37	AOECCMD_PTEST,
	38	AOECCMD_SET,
	39	AOECCMD_FSET,
	40
	41	AOE_HVER = 0x10,
	42	};
	43
	44	struct aoe_hdr {
	45	unsigned char dst[6];
	46	unsigned char src[6];
63e9cc5d	47	__be16 type;
1da177e4 LT	48	unsigned char verfl;
1da177e4 LT	49	unsigned char err;
63e9cc5d	50	__be16 major;
1da177e4 LT	51	unsigned char minor;
1da177e4 LT	52	unsigned char cmd;
63e9cc5d	53	__be32 tag;
1da177e4 LT	54	};
	55
	56	struct aoe_atahdr {
	57	unsigned char aflags;
	58	unsigned char errfeat;
	59	unsigned char scnt;
	60	unsigned char cmdstat;
	61	unsigned char lba0;
	62	unsigned char lba1;
	63	unsigned char lba2;
	64	unsigned char lba3;
	65	unsigned char lba4;
	66	unsigned char lba5;
	67	unsigned char res[2];
	68	};
	69
	70	struct aoe_cfghdr {
63e9cc5d	71	__be16 bufcnt;
63e9cc5d	72	__be16 fwver;
19bf2635	73	unsigned char scnt;
1da177e4 LT	74	unsigned char aoeccmd;
	75	unsigned char cslen[2];
	76	};
	77
	78	enum {
	79	DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
	80	DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
	81	DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
	82	DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */
3ae1c24e EC	83	DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
	84	DEVFL_PAUSE = (1<<5),
	85	DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
19bf2635	86	DEVFL_MAXBCNT = (1<<7), /* d->maxbcnt is not changeable */
1da177e4 LT	87
	88	BUFFL_FAIL = 1,
	89	};
	90
	91	enum {
19bf2635	92	DEFAULTBCNT = 2 * 512, /* 2 sectors */
e39526e6	93	NPERSHELF = 16, /* number of slots per shelf address */
1da177e4 LT	94	FREETAG = -1,
	95	MIN_BUFS = 8,
	96	};
	97
	98	struct buf {
	99	struct list_head bufs;
0c6f0e79	100	ulong start_time; /* for disk stats */
1da177e4 LT	101	ulong flags;
	102	ulong nframesout;
	103	char *bufaddr;
	104	ulong resid;
	105	ulong bv_resid;
	106	sector_t sector;
	107	struct bio *bio;
	108	struct bio_vec *bv;
	109	};
	110
	111	struct frame {
	112	int tag;
	113	ulong waited;
	114	struct buf *buf;
	115	char *bufaddr;
19bf2635 EC	116	ulong bcnt;
19bf2635 EC	117	sector_t lba;
e407a7f6	118	struct sk_buff *skb;
1da177e4 LT	119	};
	120
	121	struct aoedev {
	122	struct aoedev *next;
	123	unsigned char addr[6]; /* remote mac addr */
	124	ushort flags;
	125	ulong sysminor;
	126	ulong aoemajor;
	127	ulong aoeminor;
dced3a05 EC	128	u16 nopen; /* (bd_openers isn't available without sleeping) */
	129	u16 lasttag; /* last tag sent */
	130	u16 rttavg; /* round trip average of requests/responses */
	131	u16 mintimer;
1da177e4	132	u16 fw_ver; /* version of blade's firmware */
19bf2635	133	u16 maxbcnt;
1da177e4 LT	134	struct work_struct work;/* disk create work struct */
	135	struct gendisk *gd;
	136	request_queue_t blkq;
	137	struct hd_geometry geo;
	138	sector_t ssize;
	139	struct timer_list timer;
	140	spinlock_t lock;
	141	struct net_device ifp; / interface ed is attached to */
a4b38364	142	struct sk_buff sendq_hd; / packets needing to be sent, list head */
a4b38364	143	struct sk_buff *sendq_tl;
1da177e4 LT	144	mempool_t bufpool; / for deadlock-free Buf allocation */
	145	struct list_head bufq; /* queue of bios to work on */
	146	struct buf inprocess; / the one we're currently working on */
19bf2635 EC	147	ushort lostjumbo;
19bf2635 EC	148	ushort nframes; /* number of frames below */
1da177e4 LT	149	struct frame *frames;
	150	};
	151
	152
	153	int aoeblk_init(void);
	154	void aoeblk_exit(void);
	155	void aoeblk_gdalloc(void *);
	156	void aoedisk_rm_sysfs(struct aoedev *d);
	157
	158	int aoechr_init(void);
	159	void aoechr_exit(void);
	160	void aoechr_error(char *);
	161
	162	void aoecmd_work(struct aoedev *d);
3ae1c24e	163	void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
1da177e4 LT	164	void aoecmd_ata_rsp(struct sk_buff *);
1da177e4 LT	165	void aoecmd_cfg_rsp(struct sk_buff *);
3ae1c24e	166	void aoecmd_sleepwork(void *vp);
e407a7f6	167	struct sk_buff *new_skb(ulong);
1da177e4 LT	168
	169	int aoedev_init(void);
	170	void aoedev_exit(void);
32465c65	171	struct aoedev *aoedev_by_aoeaddr(int maj, int min);
3ae1c24e	172	struct aoedev *aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt);
1da177e4	173	void aoedev_downdev(struct aoedev *d);
3ae1c24e	174	int aoedev_isbusy(struct aoedev *d);
1da177e4 LT	175
	176	int aoenet_init(void);
	177	void aoenet_exit(void);
	178	void aoenet_xmit(struct sk_buff *);
	179	int is_aoe_netif(struct net_device *ifp);
	180	int set_aoe_iflist(const char __user *str, size_t size);
	181
	182	u64 mac_addr(char addr[6]);