173 lines
3.9 KiB
C
173 lines
3.9 KiB
C
/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
|
|
#define VERSION "10"
|
|
#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];
|
|
__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_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 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, 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_by_aoeaddr(int maj, int min);
|
|
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]);
|