1 /* 2 * drivers/s390/net/ctcm_main.h 3 * 4 * Copyright IBM Corp. 2001, 2007 5 * Authors: Fritz Elfert (felfert@millenux.com) 6 * Peter Tiedemann (ptiedem@de.ibm.com) 7 */ 8 9 #ifndef _CTCM_MAIN_H_ 10 #define _CTCM_MAIN_H_ 11 12 #include <asm/ccwdev.h> 13 #include <asm/ccwgroup.h> 14 15 #include <linux/skbuff.h> 16 #include <linux/netdevice.h> 17 18 #include "fsm.h" 19 #include "cu3088.h" 20 #include "ctcm_dbug.h" 21 #include "ctcm_mpc.h" 22 23 #define CTC_DRIVER_NAME "ctcm" 24 #define CTC_DEVICE_NAME "ctc" 25 #define MPC_DEVICE_NAME "mpc" 26 #define CTC_DEVICE_GENE CTC_DEVICE_NAME "%d" 27 #define MPC_DEVICE_GENE MPC_DEVICE_NAME "%d" 28 29 #define CHANNEL_FLAGS_READ 0 30 #define CHANNEL_FLAGS_WRITE 1 31 #define CHANNEL_FLAGS_INUSE 2 32 #define CHANNEL_FLAGS_BUFSIZE_CHANGED 4 33 #define CHANNEL_FLAGS_FAILED 8 34 #define CHANNEL_FLAGS_WAITIRQ 16 35 #define CHANNEL_FLAGS_RWMASK 1 36 #define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK) 37 38 #define LOG_FLAG_ILLEGALPKT 1 39 #define LOG_FLAG_ILLEGALSIZE 2 40 #define LOG_FLAG_OVERRUN 4 41 #define LOG_FLAG_NOMEM 8 42 43 #define ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg) 44 45 #define CTCM_PR_DEBUG(fmt, arg...) \ 46 do { \ 47 if (do_debug) \ 48 printk(KERN_DEBUG fmt, ##arg); \ 49 } while (0) 50 51 #define CTCM_PR_DBGDATA(fmt, arg...) \ 52 do { \ 53 if (do_debug_data) \ 54 printk(KERN_DEBUG fmt, ##arg); \ 55 } while (0) 56 57 #define CTCM_D3_DUMP(buf, len) \ 58 do { \ 59 if (do_debug_data) \ 60 ctcmpc_dumpit(buf, len); \ 61 } while (0) 62 63 #define CTCM_CCW_DUMP(buf, len) \ 64 do { \ 65 if (do_debug_ccw) \ 66 ctcmpc_dumpit(buf, len); \ 67 } while (0) 68 69 /* 70 * CCW commands, used in this driver. 71 */ 72 #define CCW_CMD_WRITE 0x01 73 #define CCW_CMD_READ 0x02 74 #define CCW_CMD_NOOP 0x03 75 #define CCW_CMD_TIC 0x08 76 #define CCW_CMD_SENSE_CMD 0x14 77 #define CCW_CMD_WRITE_CTL 0x17 78 #define CCW_CMD_SET_EXTENDED 0xc3 79 #define CCW_CMD_PREPARE 0xe3 80 81 #define CTCM_PROTO_S390 0 82 #define CTCM_PROTO_LINUX 1 83 #define CTCM_PROTO_LINUX_TTY 2 84 #define CTCM_PROTO_OS390 3 85 #define CTCM_PROTO_MPC 4 86 #define CTCM_PROTO_MAX 4 87 88 #define CTCM_BUFSIZE_LIMIT 65535 89 #define CTCM_BUFSIZE_DEFAULT 32768 90 #define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT 91 92 #define CTCM_TIME_1_SEC 1000 93 #define CTCM_TIME_5_SEC 5000 94 #define CTCM_TIME_10_SEC 10000 95 96 #define CTCM_INITIAL_BLOCKLEN 2 97 98 #define READ 0 99 #define WRITE 1 100 101 #define CTCM_ID_SIZE 20+3 102 103 struct ctcm_profile { 104 unsigned long maxmulti; 105 unsigned long maxcqueue; 106 unsigned long doios_single; 107 unsigned long doios_multi; 108 unsigned long txlen; 109 unsigned long tx_time; 110 struct timespec send_stamp; 111 }; 112 113 /* 114 * Definition of one channel 115 */ 116 struct channel { 117 struct channel *next; 118 char id[CTCM_ID_SIZE]; 119 struct ccw_device *cdev; 120 /* 121 * Type of this channel. 122 * CTC/A or Escon for valid channels. 123 */ 124 enum channel_types type; 125 /* 126 * Misc. flags. See CHANNEL_FLAGS_... below 127 */ 128 __u32 flags; 129 __u16 protocol; /* protocol of this channel (4 = MPC) */ 130 /* 131 * I/O and irq related stuff 132 */ 133 struct ccw1 *ccw; 134 struct irb *irb; 135 /* 136 * RX/TX buffer size 137 */ 138 int max_bufsize; 139 struct sk_buff *trans_skb; /* transmit/receive buffer */ 140 struct sk_buff_head io_queue; /* universal I/O queue */ 141 struct tasklet_struct ch_tasklet; /* MPC ONLY */ 142 /* 143 * TX queue for collecting skb's during busy. 144 */ 145 struct sk_buff_head collect_queue; 146 /* 147 * Amount of data in collect_queue. 148 */ 149 int collect_len; 150 /* 151 * spinlock for collect_queue and collect_len 152 */ 153 spinlock_t collect_lock; 154 /* 155 * Timer for detecting unresposive 156 * I/O operations. 157 */ 158 fsm_timer timer; 159 /* MPC ONLY section begin */ 160 __u32 th_seq_num; /* SNA TH seq number */ 161 __u8 th_seg; 162 __u32 pdu_seq; 163 struct sk_buff *xid_skb; 164 char *xid_skb_data; 165 struct th_header *xid_th; 166 struct xid2 *xid; 167 char *xid_id; 168 struct th_header *rcvd_xid_th; 169 struct xid2 *rcvd_xid; 170 char *rcvd_xid_id; 171 __u8 in_mpcgroup; 172 fsm_timer sweep_timer; 173 struct sk_buff_head sweep_queue; 174 struct th_header *discontact_th; 175 struct tasklet_struct ch_disc_tasklet; 176 /* MPC ONLY section end */ 177 178 int retry; /* retry counter for misc. operations */ 179 fsm_instance *fsm; /* finite state machine of this channel */ 180 struct net_device *netdev; /* corresponding net_device */ 181 struct ctcm_profile prof; 182 __u8 *trans_skb_data; 183 __u16 logflags; 184 __u8 sense_rc; /* last unit check sense code report control */ 185 }; 186 187 struct ctcm_priv { 188 struct net_device_stats stats; 189 unsigned long tbusy; 190 191 /* The MPC group struct of this interface */ 192 struct mpc_group *mpcg; /* MPC only */ 193 struct xid2 *xid; /* MPC only */ 194 195 /* The finite state machine of this interface */ 196 fsm_instance *fsm; 197 198 /* The protocol of this device */ 199 __u16 protocol; 200 201 /* Timer for restarting after I/O Errors */ 202 fsm_timer restart_timer; 203 204 int buffer_size; /* ctc only */ 205 206 struct channel *channel[2]; 207 }; 208 209 int ctcm_open(struct net_device *dev); 210 int ctcm_close(struct net_device *dev); 211 212 /* 213 * prototypes for non-static sysfs functions 214 */ 215 int ctcm_add_attributes(struct device *dev); 216 void ctcm_remove_attributes(struct device *dev); 217 int ctcm_add_files(struct device *dev); 218 void ctcm_remove_files(struct device *dev); 219 220 /* 221 * Compatibility macros for busy handling 222 * of network devices. 223 */ 224 static inline void ctcm_clear_busy_do(struct net_device *dev) 225 { 226 clear_bit(0, &(((struct ctcm_priv *)dev->ml_priv)->tbusy)); 227 netif_wake_queue(dev); 228 } 229 230 static inline void ctcm_clear_busy(struct net_device *dev) 231 { 232 struct mpc_group *grp; 233 grp = ((struct ctcm_priv *)dev->ml_priv)->mpcg; 234 235 if (!(grp && grp->in_sweep)) 236 ctcm_clear_busy_do(dev); 237 } 238 239 240 static inline int ctcm_test_and_set_busy(struct net_device *dev) 241 { 242 netif_stop_queue(dev); 243 return test_and_set_bit(0, 244 &(((struct ctcm_priv *)dev->ml_priv)->tbusy)); 245 } 246 247 extern int loglevel; 248 extern struct channel *channels; 249 250 void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb); 251 252 /* 253 * Functions related to setup and device detection. 254 */ 255 256 static inline int ctcm_less_than(char *id1, char *id2) 257 { 258 unsigned long dev1, dev2; 259 260 id1 = id1 + 5; 261 id2 = id2 + 5; 262 263 dev1 = simple_strtoul(id1, &id1, 16); 264 dev2 = simple_strtoul(id2, &id2, 16); 265 266 return (dev1 < dev2); 267 } 268 269 int ctcm_ch_alloc_buffer(struct channel *ch); 270 271 static inline int ctcm_checkalloc_buffer(struct channel *ch) 272 { 273 if (ch->trans_skb == NULL) 274 return ctcm_ch_alloc_buffer(ch); 275 if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) { 276 dev_kfree_skb(ch->trans_skb); 277 return ctcm_ch_alloc_buffer(ch); 278 } 279 return 0; 280 } 281 282 struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv); 283 284 /* test if protocol attribute (of struct ctcm_priv or struct channel) 285 * has MPC protocol setting. Type is not checked 286 */ 287 #define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC) 288 289 /* test if struct ctcm_priv of struct net_device has MPC protocol setting */ 290 #define IS_MPCDEV(dev) IS_MPC((struct ctcm_priv *)dev->ml_priv) 291 292 static inline gfp_t gfp_type(void) 293 { 294 return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; 295 } 296 297 /* 298 * Definition of our link level header. 299 */ 300 struct ll_header { 301 __u16 length; 302 __u16 type; 303 __u16 unused; 304 }; 305 #define LL_HEADER_LENGTH (sizeof(struct ll_header)) 306 307 #endif 308