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

/* Copyright (c) 2004 Coraid, Inc.  See COPYING for GPL terms. */
#define VERSION "5"
#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) * 10 + (aoeminor))
#define AOEMAJOR(sysminor) ((sysminor) / 10)
#define AOEMINOR(sysminor) ((sysminor) % 10)
#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];
	unsigned char type[2];
	unsigned char verfl;
	unsigned char err;
	unsigned char major[2];
	unsigned char minor;
	unsigned char cmd;
	unsigned char tag[4];
};

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 {
	unsigned char bufcnt[2];
	unsigned char fwver[2];
	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_WC_UPDATE = (1<<4), /* this device needs to update write cache status */
	DEVFL_WORKON = (1<<4),

	BUFFL_FAIL = 1,
};

enum {
	MAXATADATA = 1024,
	NPERSHELF = 10,
	FREETAG = -1,
	MIN_BUFS = 8,
};

struct buf {
	struct list_head bufs;
	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 *skblist;/* packets needing to be sent */
	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, unsigned char);
void aoecmd_ata_rsp(struct sk_buff *);
void aoecmd_cfg_rsp(struct sk_buff *);

int aoedev_init(void);
void aoedev_exit(void);
struct aoedev *aoedev_bymac(unsigned char *);
void aoedev_downdev(struct aoedev *d);
struct aoedev *aoedev_set(ulong, unsigned char *, struct net_device *, ulong);
int aoedev_busy(void);

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
1da177e4 LT	1	/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
	2	#define VERSION "5"
	3	#define AOE_MAJOR 152
	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 LT	9	#ifndef AOE_PARTITIONS
	10	#define AOE_PARTITIONS 16
	11	#endif
fc458dcd	12
1da177e4 LT	13	#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * 10 + (aoeminor))
	14	#define AOEMAJOR(sysminor) ((sysminor) / 10)
	15	#define AOEMINOR(sysminor) ((sysminor) % 10)
	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];
	42	unsigned char type[2];
	43	unsigned char verfl;
	44	unsigned char err;
	45	unsigned char major[2];
	46	unsigned char minor;
	47	unsigned char cmd;
	48	unsigned char tag[4];
	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 {
	66	unsigned char bufcnt[2];
	67	unsigned char fwver[2];
	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 */
78	DEVFL_WC_UPDATE = (1<<4), /* this device needs to update write cache status */
79	DEVFL_WORKON = (1<<4),
80
81	BUFFL_FAIL = 1,
82	};
83
84	enum {
85	MAXATADATA = 1024,
86	NPERSHELF = 10,
87	FREETAG = -1,
88	MIN_BUFS = 8,
89	};
90
91	struct buf {
92	struct list_head bufs;
93	ulong flags;
94	ulong nframesout;
95	char *bufaddr;
96	ulong resid;
97	ulong bv_resid;
98	sector_t sector;
99	struct bio *bio;
100	struct bio_vec *bv;
101	};
102
103	struct frame {
104	int tag;
105	ulong waited;
106	struct buf *buf;
107	char *bufaddr;
108	int writedatalen;
109	int ndata;
110
111	/* largest possible */
112	unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
113	};
114
115	struct aoedev {
116	struct aoedev *next;
117	unsigned char addr[6]; /* remote mac addr */
118	ushort flags;
119	ulong sysminor;
120	ulong aoemajor;
121	ulong aoeminor;
122	ulong nopen; /* (bd_openers isn't available without sleeping) */
123	ulong rttavg; /* round trip average of requests/responses */
124	u16 fw_ver; /* version of blade's firmware */
125	struct work_struct work;/* disk create work struct */
126	struct gendisk *gd;
127	request_queue_t blkq;
128	struct hd_geometry geo;
129	sector_t ssize;
130	struct timer_list timer;
131	spinlock_t lock;
132	struct net_device ifp; / interface ed is attached to */
133	struct sk_buff skblist;/ packets needing to be sent */
134	mempool_t bufpool; / for deadlock-free Buf allocation */
135	struct list_head bufq; /* queue of bios to work on */
136	struct buf inprocess; / the one we're currently working on */
137	ulong lasttag; /* last tag sent */
138	ulong nframes; /* number of frames below */
139	struct frame *frames;
140	};
141
142
143	int aoeblk_init(void);
144	void aoeblk_exit(void);
145	void aoeblk_gdalloc(void *);
146	void aoedisk_rm_sysfs(struct aoedev *d);
147
148	int aoechr_init(void);
149	void aoechr_exit(void);
150	void aoechr_error(char *);
151
152	void aoecmd_work(struct aoedev *d);
153	void aoecmd_cfg(ushort, unsigned char);
154	void aoecmd_ata_rsp(struct sk_buff *);
155	void aoecmd_cfg_rsp(struct sk_buff *);
156
157	int aoedev_init(void);
158	void aoedev_exit(void);
159	struct aoedev aoedev_bymac(unsigned char );
160	void aoedev_downdev(struct aoedev *d);
161	struct aoedev aoedev_set(ulong, unsigned char , struct net_device *, ulong);
162	int aoedev_busy(void);
163
164	int aoenet_init(void);
165	void aoenet_exit(void);
166	void aoenet_xmit(struct sk_buff *);
167	int is_aoe_netif(struct net_device *ifp);
168	int set_aoe_iflist(const char __user *str, size_t size);
169
170	u64 mac_addr(char addr[6]);