1 /* Copyright (c) 2006 Coraid, Inc. See COPYING for GPL terms. */ 2 #define VERSION "32" 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 #ifdef __KERNEL__ 52 #include <linux/skbuff.h> 53 54 static inline struct aoe_hdr *aoe_hdr(const struct sk_buff *skb) 55 { 56 return (struct aoe_hdr *)skb_mac_header(skb); 57 } 58 #endif 59 60 struct aoe_atahdr { 61 unsigned char aflags; 62 unsigned char errfeat; 63 unsigned char scnt; 64 unsigned char cmdstat; 65 unsigned char lba0; 66 unsigned char lba1; 67 unsigned char lba2; 68 unsigned char lba3; 69 unsigned char lba4; 70 unsigned char lba5; 71 unsigned char res[2]; 72 }; 73 74 struct aoe_cfghdr { 75 __be16 bufcnt; 76 __be16 fwver; 77 unsigned char scnt; 78 unsigned char aoeccmd; 79 unsigned char cslen[2]; 80 }; 81 82 enum { 83 DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ 84 DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ 85 DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ 86 DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */ 87 DEVFL_GDALLOC = (1<<4), /* need to alloc gendisk */ 88 DEVFL_PAUSE = (1<<5), 89 DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */ 90 DEVFL_MAXBCNT = (1<<7), /* d->maxbcnt is not changeable */ 91 DEVFL_KICKME = (1<<8), 92 93 BUFFL_FAIL = 1, 94 }; 95 96 enum { 97 DEFAULTBCNT = 2 * 512, /* 2 sectors */ 98 NPERSHELF = 16, /* number of slots per shelf address */ 99 FREETAG = -1, 100 MIN_BUFS = 8, 101 }; 102 103 struct buf { 104 struct list_head bufs; 105 ulong start_time; /* for disk stats */ 106 ulong flags; 107 ulong nframesout; 108 char *bufaddr; 109 ulong resid; 110 ulong bv_resid; 111 sector_t sector; 112 struct bio *bio; 113 struct bio_vec *bv; 114 }; 115 116 struct frame { 117 int tag; 118 ulong waited; 119 struct buf *buf; 120 char *bufaddr; 121 ulong bcnt; 122 sector_t lba; 123 struct sk_buff *skb; 124 }; 125 126 struct aoedev { 127 struct aoedev *next; 128 unsigned char addr[6]; /* remote mac addr */ 129 ushort flags; 130 ulong sysminor; 131 ulong aoemajor; 132 ulong aoeminor; 133 u16 nopen; /* (bd_openers isn't available without sleeping) */ 134 u16 lasttag; /* last tag sent */ 135 u16 rttavg; /* round trip average of requests/responses */ 136 u16 mintimer; 137 u16 fw_ver; /* version of blade's firmware */ 138 u16 maxbcnt; 139 struct work_struct work;/* disk create work struct */ 140 struct gendisk *gd; 141 struct request_queue blkq; 142 struct hd_geometry geo; 143 sector_t ssize; 144 struct timer_list timer; 145 spinlock_t lock; 146 struct net_device *ifp; /* interface ed is attached to */ 147 struct sk_buff *sendq_hd; /* packets needing to be sent, list head */ 148 struct sk_buff *sendq_tl; 149 mempool_t *bufpool; /* for deadlock-free Buf allocation */ 150 struct list_head bufq; /* queue of bios to work on */ 151 struct buf *inprocess; /* the one we're currently working on */ 152 ushort lostjumbo; 153 ushort nframes; /* number of frames below */ 154 struct frame *frames; 155 }; 156 157 158 int aoeblk_init(void); 159 void aoeblk_exit(void); 160 void aoeblk_gdalloc(void *); 161 void aoedisk_rm_sysfs(struct aoedev *d); 162 163 int aoechr_init(void); 164 void aoechr_exit(void); 165 void aoechr_error(char *); 166 167 void aoecmd_work(struct aoedev *d); 168 void aoecmd_cfg(ushort aoemajor, unsigned char aoeminor); 169 void aoecmd_ata_rsp(struct sk_buff *); 170 void aoecmd_cfg_rsp(struct sk_buff *); 171 void aoecmd_sleepwork(struct work_struct *); 172 struct sk_buff *new_skb(ulong); 173 174 int aoedev_init(void); 175 void aoedev_exit(void); 176 struct aoedev *aoedev_by_aoeaddr(int maj, int min); 177 struct aoedev *aoedev_by_sysminor_m(ulong sysminor, ulong bufcnt); 178 void aoedev_downdev(struct aoedev *d); 179 int aoedev_isbusy(struct aoedev *d); 180 181 int aoenet_init(void); 182 void aoenet_exit(void); 183 void aoenet_xmit(struct sk_buff *); 184 int is_aoe_netif(struct net_device *ifp); 185 int set_aoe_iflist(const char __user *str, size_t size); 186 187 u64 mac_addr(char addr[6]); 188