1 /* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */ 2 #define VERSION "14" 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 res; 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_WC_UPDATE = (1<<4), /* this device needs to update write cache status */ 79 DEVFL_WORKON = (1<<4), 80 81 BUFFL_FAIL = 1, 82 }; 83 84 enum { 85 MAXATADATA = 1024, 86 NPERSHELF = 16, /* number of slots per shelf address */ 87 FREETAG = -1, 88 MIN_BUFS = 8, 89 }; 90 91 struct buf { 92 struct list_head bufs; 93 ulong start_time; /* for disk stats */ 94 ulong flags; 95 ulong nframesout; 96 char *bufaddr; 97 ulong resid; 98 ulong bv_resid; 99 sector_t sector; 100 struct bio *bio; 101 struct bio_vec *bv; 102 }; 103 104 struct frame { 105 int tag; 106 ulong waited; 107 struct buf *buf; 108 char *bufaddr; 109 int writedatalen; 110 int ndata; 111 112 /* largest possible */ 113 unsigned char data[sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr)]; 114 }; 115 116 struct aoedev { 117 struct aoedev *next; 118 unsigned char addr[6]; /* remote mac addr */ 119 ushort flags; 120 ulong sysminor; 121 ulong aoemajor; 122 ulong aoeminor; 123 ulong nopen; /* (bd_openers isn't available without sleeping) */ 124 ulong rttavg; /* round trip average of requests/responses */ 125 u16 fw_ver; /* version of blade's firmware */ 126 struct work_struct work;/* disk create work struct */ 127 struct gendisk *gd; 128 request_queue_t blkq; 129 struct hd_geometry geo; 130 sector_t ssize; 131 struct timer_list timer; 132 spinlock_t lock; 133 struct net_device *ifp; /* interface ed is attached to */ 134 struct sk_buff *sendq_hd; /* packets needing to be sent, list head */ 135 struct sk_buff *sendq_tl; 136 mempool_t *bufpool; /* for deadlock-free Buf allocation */ 137 struct list_head bufq; /* queue of bios to work on */ 138 struct buf *inprocess; /* the one we're currently working on */ 139 ulong lasttag; /* last tag sent */ 140 ulong nframes; /* number of frames below */ 141 struct frame *frames; 142 }; 143 144 145 int aoeblk_init(void); 146 void aoeblk_exit(void); 147 void aoeblk_gdalloc(void *); 148 void aoedisk_rm_sysfs(struct aoedev *d); 149 150 int aoechr_init(void); 151 void aoechr_exit(void); 152 void aoechr_error(char *); 153 154 void aoecmd_work(struct aoedev *d); 155 void aoecmd_cfg(ushort, unsigned char); 156 void aoecmd_ata_rsp(struct sk_buff *); 157 void aoecmd_cfg_rsp(struct sk_buff *); 158 159 int aoedev_init(void); 160 void aoedev_exit(void); 161 struct aoedev *aoedev_by_aoeaddr(int maj, int min); 162 void aoedev_downdev(struct aoedev *d); 163 struct aoedev *aoedev_set(ulong, unsigned char *, struct net_device *, ulong); 164 int aoedev_busy(void); 165 166 int aoenet_init(void); 167 void aoenet_exit(void); 168 void aoenet_xmit(struct sk_buff *); 169 int is_aoe_netif(struct net_device *ifp); 170 int set_aoe_iflist(const char __user *str, size_t size); 171 172 u64 mac_addr(char addr[6]); 173