1 /* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */ 2 #define VERSION "47" 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 SYSMINOR(aoemajor, aoeminor) ((aoemajor) * NPERSHELF + (aoeminor)) 14 #define AOEMAJOR(sysminor) ((sysminor) / NPERSHELF) 15 #define AOEMINOR(sysminor) ((sysminor) % NPERSHELF) 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 __be16 type; 43 unsigned char verfl; 44 unsigned char err; 45 __be16 major; 46 unsigned char minor; 47 unsigned char cmd; 48 __be32 tag; 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 __be16 bufcnt; 67 __be16 fwver; 68 unsigned char scnt; 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_GDALLOC = (1<<4), /* need to alloc gendisk */ 79 DEVFL_KICKME = (1<<5), /* slow polling network card catch */ 80 DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */ 81 82 BUFFL_FAIL = 1, 83 }; 84 85 enum { 86 DEFAULTBCNT = 2 * 512, /* 2 sectors */ 87 NPERSHELF = 16, /* number of slots per shelf address */ 88 FREETAG = -1, 89 MIN_BUFS = 16, 90 NTARGETS = 8, 91 NAOEIFS = 8, 92 NSKBPOOLMAX = 128, 93 94 TIMERTICK = HZ / 10, 95 MINTIMER = HZ >> 2, 96 MAXTIMER = HZ << 1, 97 HELPWAIT = 20, 98 }; 99 100 struct buf { 101 struct list_head bufs; 102 ulong stime; /* for disk stats */ 103 ulong flags; 104 ulong nframesout; 105 ulong resid; 106 ulong bv_resid; 107 ulong bv_off; 108 sector_t sector; 109 struct bio *bio; 110 struct bio_vec *bv; 111 }; 112 113 struct frame { 114 int tag; 115 ulong waited; 116 struct buf *buf; 117 char *bufaddr; 118 ulong bcnt; 119 sector_t lba; 120 struct sk_buff *skb; 121 }; 122 123 struct aoeif { 124 struct net_device *nd; 125 unsigned char lost; 126 unsigned char lostjumbo; 127 ushort maxbcnt; 128 }; 129 130 struct aoetgt { 131 unsigned char addr[6]; 132 ushort nframes; 133 struct frame *frames; 134 struct aoeif ifs[NAOEIFS]; 135 struct aoeif *ifp; /* current aoeif in use */ 136 ushort nout; 137 ushort maxout; 138 u16 lasttag; /* last tag sent */ 139 u16 useme; 140 ulong lastwadj; /* last window adjustment */ 141 int wpkts, rpkts; 142 int dataref; 143 }; 144 145 struct aoedev { 146 struct aoedev *next; 147 ulong sysminor; 148 ulong aoemajor; 149 u16 aoeminor; 150 u16 flags; 151 u16 nopen; /* (bd_openers isn't available without sleeping) */ 152 u16 rttavg; /* round trip average of requests/responses */ 153 u16 mintimer; 154 u16 fw_ver; /* version of blade's firmware */ 155 struct work_struct work;/* disk create work struct */ 156 struct gendisk *gd; 157 struct request_queue blkq; 158 struct hd_geometry geo; 159 sector_t ssize; 160 struct timer_list timer; 161 spinlock_t lock; 162 struct sk_buff *sendq_hd; /* packets needing to be sent, list head */ 163 struct sk_buff *sendq_tl; 164 struct sk_buff *skbpool_hd; 165 struct sk_buff *skbpool_tl; 166 int nskbpool; 167 mempool_t *bufpool; /* for deadlock-free Buf allocation */ 168 struct list_head bufq; /* queue of bios to work on */ 169 struct buf *inprocess; /* the one we're currently working on */ 170 struct aoetgt *targets[NTARGETS]; 171 struct aoetgt **tgt; /* target in use when working */ 172 struct aoetgt **htgt; /* target needing rexmit assistance */ 173 }; 174 175 176 int aoeblk_init(void); 177 void aoeblk_exit(void); 178 void aoeblk_gdalloc(void *); 179 void aoedisk_rm_sysfs(struct aoedev *d); 180 181 int aoechr_init(void); 182 void aoechr_exit(void); 183 void aoechr_error(char *); 184 185 void aoecmd_work(struct aoedev *d); 186 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); 187 void aoecmd_ata_rsp(struct sk_buff *); 188 void aoecmd_cfg_rsp(struct sk_buff *); 189 void aoecmd_sleepwork(struct work_struct *); 190 void aoecmd_cleanslate(struct aoedev *); 191 struct sk_buff *aoecmd_ata_id(struct aoedev *); 192 193 int aoedev_init(void); 194 void aoedev_exit(void); 195 struct aoedev *aoedev_by_aoeaddr(int maj, int min); 196 struct aoedev *aoedev_by_sysminor_m(ulong sysminor); 197 void aoedev_downdev(struct aoedev *d); 198 int aoedev_flush(const char __user *str, size_t size); 199 200 int aoenet_init(void); 201 void aoenet_exit(void); 202 void aoenet_xmit(struct sk_buff *); 203 int is_aoe_netif(struct net_device *ifp); 204 int set_aoe_iflist(const char __user *str, size_t size); 205 206 unsigned long long mac_addr(char addr[6]); 207