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 "ctcm_dbug.h" 20#include "ctcm_mpc.h" 21 22#define CTC_DRIVER_NAME "ctcm" 23#define CTC_DEVICE_NAME "ctc" 24#define MPC_DEVICE_NAME "mpc" 25#define CTC_DEVICE_GENE CTC_DEVICE_NAME "%d" 26#define MPC_DEVICE_GENE MPC_DEVICE_NAME "%d" 27 28#define CHANNEL_FLAGS_READ 0 29#define CHANNEL_FLAGS_WRITE 1 30#define CHANNEL_FLAGS_INUSE 2 31#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4 32#define CHANNEL_FLAGS_FAILED 8 33#define CHANNEL_FLAGS_WAITIRQ 16 34#define CHANNEL_FLAGS_RWMASK 1 35#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK) 36 37#define LOG_FLAG_ILLEGALPKT 1 38#define LOG_FLAG_ILLEGALSIZE 2 39#define LOG_FLAG_OVERRUN 4 40#define LOG_FLAG_NOMEM 8 41 42#define ctcm_pr_debug(fmt, arg...) printk(KERN_DEBUG fmt, ##arg) 43 44#define CTCM_PR_DEBUG(fmt, arg...) \ 45 do { \ 46 if (do_debug) \ 47 printk(KERN_DEBUG fmt, ##arg); \ 48 } while (0) 49 50#define CTCM_PR_DBGDATA(fmt, arg...) \ 51 do { \ 52 if (do_debug_data) \ 53 printk(KERN_DEBUG fmt, ##arg); \ 54 } while (0) 55 56#define CTCM_D3_DUMP(buf, len) \ 57 do { \ 58 if (do_debug_data) \ 59 ctcmpc_dumpit(buf, len); \ 60 } while (0) 61 62#define CTCM_CCW_DUMP(buf, len) \ 63 do { \ 64 if (do_debug_ccw) \ 65 ctcmpc_dumpit(buf, len); \ 66 } while (0) 67 68/** 69 * Enum for classifying detected devices 70 */ 71enum ctcm_channel_types { 72 /* Device is not a channel */ 73 ctcm_channel_type_none, 74 75 /* Device is a CTC/A */ 76 ctcm_channel_type_parallel, 77 78 /* Device is a FICON channel */ 79 ctcm_channel_type_ficon, 80 81 /* Device is a ESCON channel */ 82 ctcm_channel_type_escon 83}; 84 85/* 86 * CCW commands, used in this driver. 87 */ 88#define CCW_CMD_WRITE 0x01 89#define CCW_CMD_READ 0x02 90#define CCW_CMD_NOOP 0x03 91#define CCW_CMD_TIC 0x08 92#define CCW_CMD_SENSE_CMD 0x14 93#define CCW_CMD_WRITE_CTL 0x17 94#define CCW_CMD_SET_EXTENDED 0xc3 95#define CCW_CMD_PREPARE 0xe3 96 97#define CTCM_PROTO_S390 0 98#define CTCM_PROTO_LINUX 1 99#define CTCM_PROTO_LINUX_TTY 2 100#define CTCM_PROTO_OS390 3 101#define CTCM_PROTO_MPC 4 102#define CTCM_PROTO_MAX 4 103 104#define CTCM_BUFSIZE_LIMIT 65535 105#define CTCM_BUFSIZE_DEFAULT 32768 106#define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT 107 108#define CTCM_TIME_1_SEC 1000 109#define CTCM_TIME_5_SEC 5000 110#define CTCM_TIME_10_SEC 10000 111 112#define CTCM_INITIAL_BLOCKLEN 2 113 114#define CTCM_READ 0 115#define CTCM_WRITE 1 116 117#define CTCM_ID_SIZE 20+3 118 119struct ctcm_profile { 120 unsigned long maxmulti; 121 unsigned long maxcqueue; 122 unsigned long doios_single; 123 unsigned long doios_multi; 124 unsigned long txlen; 125 unsigned long tx_time; 126 struct timespec send_stamp; 127}; 128 129/* 130 * Definition of one channel 131 */ 132struct channel { 133 struct channel *next; 134 char id[CTCM_ID_SIZE]; 135 struct ccw_device *cdev; 136 /* 137 * Type of this channel. 138 * CTC/A or Escon for valid channels. 139 */ 140 enum ctcm_channel_types type; 141 /* 142 * Misc. flags. See CHANNEL_FLAGS_... below 143 */ 144 __u32 flags; 145 __u16 protocol; /* protocol of this channel (4 = MPC) */ 146 /* 147 * I/O and irq related stuff 148 */ 149 struct ccw1 *ccw; 150 struct irb *irb; 151 /* 152 * RX/TX buffer size 153 */ 154 int max_bufsize; 155 struct sk_buff *trans_skb; /* transmit/receive buffer */ 156 struct sk_buff_head io_queue; /* universal I/O queue */ 157 struct tasklet_struct ch_tasklet; /* MPC ONLY */ 158 /* 159 * TX queue for collecting skb's during busy. 160 */ 161 struct sk_buff_head collect_queue; 162 /* 163 * Amount of data in collect_queue. 164 */ 165 int collect_len; 166 /* 167 * spinlock for collect_queue and collect_len 168 */ 169 spinlock_t collect_lock; 170 /* 171 * Timer for detecting unresposive 172 * I/O operations. 173 */ 174 fsm_timer timer; 175 /* MPC ONLY section begin */ 176 __u32 th_seq_num; /* SNA TH seq number */ 177 __u8 th_seg; 178 __u32 pdu_seq; 179 struct sk_buff *xid_skb; 180 char *xid_skb_data; 181 struct th_header *xid_th; 182 struct xid2 *xid; 183 char *xid_id; 184 struct th_header *rcvd_xid_th; 185 struct xid2 *rcvd_xid; 186 char *rcvd_xid_id; 187 __u8 in_mpcgroup; 188 fsm_timer sweep_timer; 189 struct sk_buff_head sweep_queue; 190 struct th_header *discontact_th; 191 struct tasklet_struct ch_disc_tasklet; 192 /* MPC ONLY section end */ 193 194 int retry; /* retry counter for misc. operations */ 195 fsm_instance *fsm; /* finite state machine of this channel */ 196 struct net_device *netdev; /* corresponding net_device */ 197 struct ctcm_profile prof; 198 __u8 *trans_skb_data; 199 __u16 logflags; 200 __u8 sense_rc; /* last unit check sense code report control */ 201}; 202 203struct ctcm_priv { 204 struct net_device_stats stats; 205 unsigned long tbusy; 206 207 /* The MPC group struct of this interface */ 208 struct mpc_group *mpcg; /* MPC only */ 209 struct xid2 *xid; /* MPC only */ 210 211 /* The finite state machine of this interface */ 212 fsm_instance *fsm; 213 214 /* The protocol of this device */ 215 __u16 protocol; 216 217 /* Timer for restarting after I/O Errors */ 218 fsm_timer restart_timer; 219 220 int buffer_size; /* ctc only */ 221 222 struct channel *channel[2]; 223}; 224 225int ctcm_open(struct net_device *dev); 226int ctcm_close(struct net_device *dev); 227 228/* 229 * prototypes for non-static sysfs functions 230 */ 231int ctcm_add_attributes(struct device *dev); 232void ctcm_remove_attributes(struct device *dev); 233int ctcm_add_files(struct device *dev); 234void ctcm_remove_files(struct device *dev); 235 236/* 237 * Compatibility macros for busy handling 238 * of network devices. 239 */ 240static inline void ctcm_clear_busy_do(struct net_device *dev) 241{ 242 clear_bit(0, &(((struct ctcm_priv *)dev->ml_priv)->tbusy)); 243 netif_wake_queue(dev); 244} 245 246static inline void ctcm_clear_busy(struct net_device *dev) 247{ 248 struct mpc_group *grp; 249 grp = ((struct ctcm_priv *)dev->ml_priv)->mpcg; 250 251 if (!(grp && grp->in_sweep)) 252 ctcm_clear_busy_do(dev); 253} 254 255 256static inline int ctcm_test_and_set_busy(struct net_device *dev) 257{ 258 netif_stop_queue(dev); 259 return test_and_set_bit(0, 260 &(((struct ctcm_priv *)dev->ml_priv)->tbusy)); 261} 262 263extern int loglevel; 264extern struct channel *channels; 265 266void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb); 267 268/* 269 * Functions related to setup and device detection. 270 */ 271 272static inline int ctcm_less_than(char *id1, char *id2) 273{ 274 unsigned long dev1, dev2; 275 276 id1 = id1 + 5; 277 id2 = id2 + 5; 278 279 dev1 = simple_strtoul(id1, &id1, 16); 280 dev2 = simple_strtoul(id2, &id2, 16); 281 282 return (dev1 < dev2); 283} 284 285int ctcm_ch_alloc_buffer(struct channel *ch); 286 287static inline int ctcm_checkalloc_buffer(struct channel *ch) 288{ 289 if (ch->trans_skb == NULL) 290 return ctcm_ch_alloc_buffer(ch); 291 if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) { 292 dev_kfree_skb(ch->trans_skb); 293 return ctcm_ch_alloc_buffer(ch); 294 } 295 return 0; 296} 297 298struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv); 299 300/* test if protocol attribute (of struct ctcm_priv or struct channel) 301 * has MPC protocol setting. Type is not checked 302 */ 303#define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC) 304 305/* test if struct ctcm_priv of struct net_device has MPC protocol setting */ 306#define IS_MPCDEV(dev) IS_MPC((struct ctcm_priv *)dev->ml_priv) 307 308static inline gfp_t gfp_type(void) 309{ 310 return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; 311} 312 313/* 314 * Definition of our link level header. 315 */ 316struct ll_header { 317 __u16 length; 318 __u16 type; 319 __u16 unused; 320}; 321#define LL_HEADER_LENGTH (sizeof(struct ll_header)) 322 323#endif 324