175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
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#define VERSION "22"
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#define AOE_MAJOR 152
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#define DEVICE_NAME "aoe"
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/* set AOE_PARTITIONS to 1 to use whole-disks only
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* default is 16, which is 15 partitions plus the whole disk
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*/
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#ifndef AOE_PARTITIONS
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#define AOE_PARTITIONS (16)
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#endif
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#define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor))
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#define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF)
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#define AOEMINOR(sysminor) ((sysminor) % NPERSHELF)
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#define WHITESPACE " \t\v\f\n"
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enum {
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AOECMD_ATA,
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AOECMD_CFG,
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AOEFL_RSP = (1<<3),
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AOEFL_ERR = (1<<2),
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AOEAFL_EXT = (1<<6),
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AOEAFL_DEV = (1<<4),
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AOEAFL_ASYNC = (1<<1),
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AOEAFL_WRITE = (1<<0),
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AOECCMD_READ = 0,
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AOECCMD_TEST,
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AOECCMD_PTEST,
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AOECCMD_SET,
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AOECCMD_FSET,
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AOE_HVER = 0x10,
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};
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struct aoe_hdr {
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unsigned char dst[6];
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unsigned char src[6];
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__be16 type;
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unsigned char verfl;
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unsigned char err;
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__be16 major;
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unsigned char minor;
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unsigned char cmd;
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__be32 tag;
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};
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struct aoe_atahdr {
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unsigned char aflags;
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unsigned char errfeat;
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unsigned char scnt;
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unsigned char cmdstat;
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unsigned char lba0;
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unsigned char lba1;
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unsigned char lba2;
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unsigned char lba3;
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unsigned char lba4;
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unsigned char lba5;
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unsigned char res[2];
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};
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struct aoe_cfghdr {
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__be16 bufcnt;
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__be16 fwver;
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unsigned char res;
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unsigned char aoeccmd;
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unsigned char cslen[2];
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};
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enum {
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DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */
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DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */
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DEVFL_EXT = (1<<2), /* device accepts lba48 commands */
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DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */
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DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */
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DEVFL_PAUSE = (1<<5),
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DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
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BUFFL_FAIL = 1,
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};
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enum {
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MAXATADATA = 1024,
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NPERSHELF = 16, /* number of slots per shelf address */
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FREETAG = -1,
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MIN_BUFS = 8,
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};
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struct buf {
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struct list_head bufs;
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ulong start_time; /* for disk stats */
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ulong flags;
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ulong nframesout;
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char *bufaddr;
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ulong resid;
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ulong bv_resid;
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sector_t sector;
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struct bio *bio;
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struct bio_vec *bv;
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};
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struct frame {
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int tag;
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ulong waited;
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struct buf *buf;
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char *bufaddr;
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int writedatalen;
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int ndata;
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/* largest possible */
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unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)];
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};
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struct aoedev {
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struct aoedev *next;
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unsigned char addr[6]; /* remote mac addr */
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ushort flags;
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ulong sysminor;
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ulong aoemajor;
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ulong aoeminor;
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ulong nopen; /* (bd_openers isn't available without sleeping) */
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ulong rttavg; /* round trip average of requests/responses */
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u16 fw_ver; /* version of blade's firmware */
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struct work_struct work;/* disk create work struct */
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struct gendisk *gd;
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request_queue_t blkq;
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struct hd_geometry geo;
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sector_t ssize;
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struct timer_list timer;
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spinlock_t lock;
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struct net_device *ifp; /* interface ed is attached to */
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struct sk_buff *sendq_hd; /* packets needing to be sent, list head */
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struct sk_buff *sendq_tl;
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mempool_t *bufpool; /* for deadlock-free Buf allocation */
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struct list_head bufq; /* queue of bios to work on */
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struct buf *inprocess; /* the one we're currently working on */
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ulong lasttag; /* last tag sent */
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ulong nframes; /* number of frames below */
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struct frame *frames;
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};
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int aoeblk_init(void);
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void aoeblk_exit(void);
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void aoeblk_gdalloc(void *);
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void aoedisk_rm_sysfs(struct aoedev *d);
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int aoechr_init(void);
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void aoechr_exit(void);
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void aoechr_error(char *);
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void aoecmd_work(struct aoedev *d);
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void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor);
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void aoecmd_ata_rsp(struct sk_buff *);
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void aoecmd_cfg_rsp(struct sk_buff *);
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void aoecmd_sleepwork(void *vp);
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int aoedev_init(void);
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void aoedev_exit(void);
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struct aoedev *aoedev_by_aoeaddr(int maj, int min);
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struct aoedev *aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt);
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void aoedev_downdev(struct aoedev *d);
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int aoedev_isbusy(struct aoedev *d);
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int aoenet_init(void);
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void aoenet_exit(void);
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void aoenet_xmit(struct sk_buff *);
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int is_aoe_netif(struct net_device *ifp);
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int set_aoe_iflist(const char __user *str, size_t size);
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u64 mac_addr(char addr[6]);
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