1 /* Copyright (c) 2012 Coraid, Inc. See COPYING for GPL terms. */ 2 #define VERSION "50" 3 #define AOE_MAJOR 152 4 #define DEVICE_NAME "aoe" 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 */ 9 #ifndef AOE_PARTITIONS 10 #define AOE_PARTITIONS (16) 11 #endif 12 13 #define WHITESPACE " \t\v\f\n" 14 15 enum { 16 AOECMD_ATA, 17 AOECMD_CFG, 18 AOECMD_VEND_MIN = 0xf0, 19 20 AOEFL_RSP = (1<<3), 21 AOEFL_ERR = (1<<2), 22 23 AOEAFL_EXT = (1<<6), 24 AOEAFL_DEV = (1<<4), 25 AOEAFL_ASYNC = (1<<1), 26 AOEAFL_WRITE = (1<<0), 27 28 AOECCMD_READ = 0, 29 AOECCMD_TEST, 30 AOECCMD_PTEST, 31 AOECCMD_SET, 32 AOECCMD_FSET, 33 34 AOE_HVER = 0x10, 35 }; 36 37 struct aoe_hdr { 38 unsigned char dst[6]; 39 unsigned char src[6]; 40 __be16 type; 41 unsigned char verfl; 42 unsigned char err; 43 __be16 major; 44 unsigned char minor; 45 unsigned char cmd; 46 __be32 tag; 47 }; 48 49 struct aoe_atahdr { 50 unsigned char aflags; 51 unsigned char errfeat; 52 unsigned char scnt; 53 unsigned char cmdstat; 54 unsigned char lba0; 55 unsigned char lba1; 56 unsigned char lba2; 57 unsigned char lba3; 58 unsigned char lba4; 59 unsigned char lba5; 60 unsigned char res[2]; 61 }; 62 63 struct aoe_cfghdr { 64 __be16 bufcnt; 65 __be16 fwver; 66 unsigned char scnt; 67 unsigned char aoeccmd; 68 unsigned char cslen[2]; 69 }; 70 71 enum { 72 DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ 73 DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ 74 DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ 75 DEVFL_GDALLOC = (1<<3), /* need to alloc gendisk */ 76 DEVFL_KICKME = (1<<4), /* slow polling network card catch */ 77 DEVFL_NEWSIZE = (1<<5), /* need to update dev size in block layer */ 78 }; 79 80 enum { 81 DEFAULTBCNT = 2 * 512, /* 2 sectors */ 82 MIN_BUFS = 16, 83 NTARGETS = 8, 84 NAOEIFS = 8, 85 NSKBPOOLMAX = 256, 86 NFACTIVE = 61, 87 88 TIMERTICK = HZ / 10, 89 MINTIMER = HZ >> 2, 90 MAXTIMER = HZ << 1, 91 }; 92 93 struct buf { 94 ulong nframesout; 95 ulong resid; 96 ulong bv_resid; 97 sector_t sector; 98 struct bio *bio; 99 struct bio_vec *bv; 100 struct request *rq; 101 }; 102 103 struct frame { 104 struct list_head head; 105 u32 tag; 106 ulong waited; 107 struct aoetgt *t; /* parent target I belong to */ 108 sector_t lba; 109 struct sk_buff *skb; /* command skb freed on module exit */ 110 struct sk_buff *r_skb; /* response skb for async processing */ 111 struct buf *buf; 112 struct bio_vec *bv; 113 ulong bcnt; 114 ulong bv_off; 115 }; 116 117 struct aoeif { 118 struct net_device *nd; 119 ulong lost; 120 int bcnt; 121 }; 122 123 struct aoetgt { 124 unsigned char addr[6]; 125 ushort nframes; 126 struct aoedev *d; /* parent device I belong to */ 127 struct list_head ffree; /* list of free frames */ 128 struct aoeif ifs[NAOEIFS]; 129 struct aoeif *ifp; /* current aoeif in use */ 130 ushort nout; 131 ushort maxout; 132 ulong falloc; 133 ulong lastwadj; /* last window adjustment */ 134 int minbcnt; 135 int wpkts, rpkts; 136 }; 137 138 struct aoedev { 139 struct aoedev *next; 140 ulong sysminor; 141 ulong aoemajor; 142 u16 aoeminor; 143 u16 flags; 144 u16 nopen; /* (bd_openers isn't available without sleeping) */ 145 u16 rttavg; /* round trip average of requests/responses */ 146 u16 mintimer; 147 u16 fw_ver; /* version of blade's firmware */ 148 u16 lasttag; /* last tag sent */ 149 u16 useme; 150 ulong ref; 151 struct work_struct work;/* disk create work struct */ 152 struct gendisk *gd; 153 struct request_queue *blkq; 154 struct hd_geometry geo; 155 sector_t ssize; 156 struct timer_list timer; 157 spinlock_t lock; 158 struct sk_buff_head skbpool; 159 mempool_t *bufpool; /* for deadlock-free Buf allocation */ 160 struct { /* pointers to work in progress */ 161 struct buf *buf; 162 struct bio *nxbio; 163 struct request *rq; 164 } ip; 165 ulong maxbcnt; 166 struct list_head factive[NFACTIVE]; /* hash of active frames */ 167 struct aoetgt *targets[NTARGETS]; 168 struct aoetgt **tgt; /* target in use when working */ 169 struct aoetgt *htgt; /* target needing rexmit assistance */ 170 ulong ntargets; 171 ulong kicked; 172 }; 173 174 /* kthread tracking */ 175 struct ktstate { 176 struct completion rendez; 177 struct task_struct *task; 178 wait_queue_head_t *waitq; 179 int (*fn) (void); 180 char *name; 181 spinlock_t *lock; 182 }; 183 184 int aoeblk_init(void); 185 void aoeblk_exit(void); 186 void aoeblk_gdalloc(void *); 187 void aoedisk_rm_sysfs(struct aoedev *d); 188 189 int aoechr_init(void); 190 void aoechr_exit(void); 191 void aoechr_error(char *); 192 193 void aoecmd_work(struct aoedev *d); 194 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); 195 struct sk_buff *aoecmd_ata_rsp(struct sk_buff *); 196 void aoecmd_cfg_rsp(struct sk_buff *); 197 void aoecmd_sleepwork(struct work_struct *); 198 void aoecmd_cleanslate(struct aoedev *); 199 void aoecmd_exit(void); 200 int aoecmd_init(void); 201 struct sk_buff *aoecmd_ata_id(struct aoedev *); 202 void aoe_freetframe(struct frame *); 203 void aoe_flush_iocq(void); 204 void aoe_end_request(struct aoedev *, struct request *, int); 205 int aoe_ktstart(struct ktstate *k); 206 void aoe_ktstop(struct ktstate *k); 207 208 int aoedev_init(void); 209 void aoedev_exit(void); 210 struct aoedev *aoedev_by_aoeaddr(ulong maj, int min, int do_alloc); 211 void aoedev_downdev(struct aoedev *d); 212 int aoedev_flush(const char __user *str, size_t size); 213 void aoe_failbuf(struct aoedev *, struct buf *); 214 void aoedev_put(struct aoedev *); 215 216 int aoenet_init(void); 217 void aoenet_exit(void); 218 void aoenet_xmit(struct sk_buff_head *); 219 int is_aoe_netif(struct net_device *ifp); 220 int set_aoe_iflist(const char __user *str, size_t size); 221