1 /* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */ 2 #define VERSION "5" 3 #define AOE_MAJOR 152 4 #define DEVICE_NAME "aoe" 5 #ifndef AOE_PARTITIONS 6 #define AOE_PARTITIONS 16 7 #endif 8 #define SYSMINOR(aoemajor, aoeminor) ((aoemajor) * 10 + (aoeminor)) 9 #define AOEMAJOR(sysminor) ((sysminor) / 10) 10 #define AOEMINOR(sysminor) ((sysminor) % 10) 11 #define WHITESPACE " \t\v\f\n" 12 13 enum { 14 AOECMD_ATA, 15 AOECMD_CFG, 16 17 AOEFL_RSP = (1<<3), 18 AOEFL_ERR = (1<<2), 19 20 AOEAFL_EXT = (1<<6), 21 AOEAFL_DEV = (1<<4), 22 AOEAFL_ASYNC = (1<<1), 23 AOEAFL_WRITE = (1<<0), 24 25 AOECCMD_READ = 0, 26 AOECCMD_TEST, 27 AOECCMD_PTEST, 28 AOECCMD_SET, 29 AOECCMD_FSET, 30 31 AOE_HVER = 0x10, 32 }; 33 34 struct aoe_hdr { 35 unsigned char dst[6]; 36 unsigned char src[6]; 37 unsigned char type[2]; 38 unsigned char verfl; 39 unsigned char err; 40 unsigned char major[2]; 41 unsigned char minor; 42 unsigned char cmd; 43 unsigned char tag[4]; 44 }; 45 46 struct aoe_atahdr { 47 unsigned char aflags; 48 unsigned char errfeat; 49 unsigned char scnt; 50 unsigned char cmdstat; 51 unsigned char lba0; 52 unsigned char lba1; 53 unsigned char lba2; 54 unsigned char lba3; 55 unsigned char lba4; 56 unsigned char lba5; 57 unsigned char res[2]; 58 }; 59 60 struct aoe_cfghdr { 61 unsigned char bufcnt[2]; 62 unsigned char fwver[2]; 63 unsigned char res; 64 unsigned char aoeccmd; 65 unsigned char cslen[2]; 66 }; 67 68 enum { 69 DEVFL_UP = 1, /* device is installed in system and ready for AoE->ATA commands */ 70 DEVFL_TKILL = (1<<1), /* flag for timer to know when to kill self */ 71 DEVFL_EXT = (1<<2), /* device accepts lba48 commands */ 72 DEVFL_CLOSEWAIT = (1<<3), /* device is waiting for all closes to revalidate */ 73 DEVFL_WC_UPDATE = (1<<4), /* this device needs to update write cache status */ 74 DEVFL_WORKON = (1<<4), 75 76 BUFFL_FAIL = 1, 77 }; 78 79 enum { 80 MAXATADATA = 1024, 81 NPERSHELF = 10, 82 FREETAG = -1, 83 MIN_BUFS = 8, 84 }; 85 86 struct buf { 87 struct list_head bufs; 88 ulong flags; 89 ulong nframesout; 90 char *bufaddr; 91 ulong resid; 92 ulong bv_resid; 93 sector_t sector; 94 struct bio *bio; 95 struct bio_vec *bv; 96 }; 97 98 struct frame { 99 int tag; 100 ulong waited; 101 struct buf *buf; 102 char *bufaddr; 103 int writedatalen; 104 int ndata; 105 106 /* largest possible */ 107 unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)]; 108 }; 109 110 struct aoedev { 111 struct aoedev *next; 112 unsigned char addr[6]; /* remote mac addr */ 113 ushort flags; 114 ulong sysminor; 115 ulong aoemajor; 116 ulong aoeminor; 117 ulong nopen; /* (bd_openers isn't available without sleeping) */ 118 ulong rttavg; /* round trip average of requests/responses */ 119 u16 fw_ver; /* version of blade's firmware */ 120 struct work_struct work;/* disk create work struct */ 121 struct gendisk *gd; 122 request_queue_t blkq; 123 struct hd_geometry geo; 124 sector_t ssize; 125 struct timer_list timer; 126 spinlock_t lock; 127 struct net_device *ifp; /* interface ed is attached to */ 128 struct sk_buff *skblist;/* packets needing to be sent */ 129 mempool_t *bufpool; /* for deadlock-free Buf allocation */ 130 struct list_head bufq; /* queue of bios to work on */ 131 struct buf *inprocess; /* the one we're currently working on */ 132 ulong lasttag; /* last tag sent */ 133 ulong nframes; /* number of frames below */ 134 struct frame *frames; 135 }; 136 137 138 int aoeblk_init(void); 139 void aoeblk_exit(void); 140 void aoeblk_gdalloc(void *); 141 void aoedisk_rm_sysfs(struct aoedev *d); 142 143 int aoechr_init(void); 144 void aoechr_exit(void); 145 void aoechr_error(char *); 146 147 void aoecmd_work(struct aoedev *d); 148 void aoecmd_cfg(ushort, unsigned char); 149 void aoecmd_ata_rsp(struct sk_buff *); 150 void aoecmd_cfg_rsp(struct sk_buff *); 151 152 int aoedev_init(void); 153 void aoedev_exit(void); 154 struct aoedev *aoedev_bymac(unsigned char *); 155 void aoedev_downdev(struct aoedev *d); 156 struct aoedev *aoedev_set(ulong, unsigned char *, struct net_device *, ulong); 157 int aoedev_busy(void); 158 159 int aoenet_init(void); 160 void aoenet_exit(void); 161 void aoenet_xmit(struct sk_buff *); 162 int is_aoe_netif(struct net_device *ifp); 163 int set_aoe_iflist(const char __user *str, size_t size); 164 165 u64 mac_addr(char addr[6]); 166