diff options
Diffstat (limited to 'drivers/block/aoe/aoe.h')
| -rw-r--r-- | drivers/block/aoe/aoe.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h new file mode 100644 index 0000000..8e54c1f --- /dev/null +++ b/drivers/block/aoe/aoe.h @@ -0,0 +1,204 @@ +/* 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); + +unsigned long long mac_addr(char addr[6]); |
