Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame^] | 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 CTC_DEVICE_GENE "ctc%d" |
| 26 | #define MPC_DEVICE_NAME "mpc" |
| 27 | #define MPC_DEVICE_GENE "mpc%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 | #define ctcm_pr_info(fmt, arg...) printk(KERN_INFO fmt, ##arg) |
| 45 | #define ctcm_pr_notice(fmt, arg...) printk(KERN_NOTICE fmt, ##arg) |
| 46 | #define ctcm_pr_warn(fmt, arg...) printk(KERN_WARNING fmt, ##arg) |
| 47 | #define ctcm_pr_emerg(fmt, arg...) printk(KERN_EMERG fmt, ##arg) |
| 48 | #define ctcm_pr_err(fmt, arg...) printk(KERN_ERR fmt, ##arg) |
| 49 | #define ctcm_pr_crit(fmt, arg...) printk(KERN_CRIT fmt, ##arg) |
| 50 | |
| 51 | /* |
| 52 | * CCW commands, used in this driver. |
| 53 | */ |
| 54 | #define CCW_CMD_WRITE 0x01 |
| 55 | #define CCW_CMD_READ 0x02 |
| 56 | #define CCW_CMD_NOOP 0x03 |
| 57 | #define CCW_CMD_TIC 0x08 |
| 58 | #define CCW_CMD_SENSE_CMD 0x14 |
| 59 | #define CCW_CMD_WRITE_CTL 0x17 |
| 60 | #define CCW_CMD_SET_EXTENDED 0xc3 |
| 61 | #define CCW_CMD_PREPARE 0xe3 |
| 62 | |
| 63 | #define CTCM_PROTO_S390 0 |
| 64 | #define CTCM_PROTO_LINUX 1 |
| 65 | #define CTCM_PROTO_LINUX_TTY 2 |
| 66 | #define CTCM_PROTO_OS390 3 |
| 67 | #define CTCM_PROTO_MPC 4 |
| 68 | #define CTCM_PROTO_MAX 4 |
| 69 | |
| 70 | #define CTCM_BUFSIZE_LIMIT 65535 |
| 71 | #define CTCM_BUFSIZE_DEFAULT 32768 |
| 72 | #define MPC_BUFSIZE_DEFAULT CTCM_BUFSIZE_LIMIT |
| 73 | |
| 74 | #define CTCM_TIME_1_SEC 1000 |
| 75 | #define CTCM_TIME_5_SEC 5000 |
| 76 | #define CTCM_TIME_10_SEC 10000 |
| 77 | |
| 78 | #define CTCM_INITIAL_BLOCKLEN 2 |
| 79 | |
| 80 | #define READ 0 |
| 81 | #define WRITE 1 |
| 82 | |
| 83 | #define CTCM_ID_SIZE BUS_ID_SIZE+3 |
| 84 | |
| 85 | struct ctcm_profile { |
| 86 | unsigned long maxmulti; |
| 87 | unsigned long maxcqueue; |
| 88 | unsigned long doios_single; |
| 89 | unsigned long doios_multi; |
| 90 | unsigned long txlen; |
| 91 | unsigned long tx_time; |
| 92 | struct timespec send_stamp; |
| 93 | }; |
| 94 | |
| 95 | /* |
| 96 | * Definition of one channel |
| 97 | */ |
| 98 | struct channel { |
| 99 | struct channel *next; |
| 100 | char id[CTCM_ID_SIZE]; |
| 101 | struct ccw_device *cdev; |
| 102 | /* |
| 103 | * Type of this channel. |
| 104 | * CTC/A or Escon for valid channels. |
| 105 | */ |
| 106 | enum channel_types type; |
| 107 | /* |
| 108 | * Misc. flags. See CHANNEL_FLAGS_... below |
| 109 | */ |
| 110 | __u32 flags; |
| 111 | __u16 protocol; /* protocol of this channel (4 = MPC) */ |
| 112 | /* |
| 113 | * I/O and irq related stuff |
| 114 | */ |
| 115 | struct ccw1 *ccw; |
| 116 | struct irb *irb; |
| 117 | /* |
| 118 | * RX/TX buffer size |
| 119 | */ |
| 120 | int max_bufsize; |
| 121 | struct sk_buff *trans_skb; /* transmit/receive buffer */ |
| 122 | struct sk_buff_head io_queue; /* universal I/O queue */ |
| 123 | struct tasklet_struct ch_tasklet; /* MPC ONLY */ |
| 124 | /* |
| 125 | * TX queue for collecting skb's during busy. |
| 126 | */ |
| 127 | struct sk_buff_head collect_queue; |
| 128 | /* |
| 129 | * Amount of data in collect_queue. |
| 130 | */ |
| 131 | int collect_len; |
| 132 | /* |
| 133 | * spinlock for collect_queue and collect_len |
| 134 | */ |
| 135 | spinlock_t collect_lock; |
| 136 | /* |
| 137 | * Timer for detecting unresposive |
| 138 | * I/O operations. |
| 139 | */ |
| 140 | fsm_timer timer; |
| 141 | /* MPC ONLY section begin */ |
| 142 | __u32 th_seq_num; /* SNA TH seq number */ |
| 143 | __u8 th_seg; |
| 144 | __u32 pdu_seq; |
| 145 | struct sk_buff *xid_skb; |
| 146 | char *xid_skb_data; |
| 147 | struct th_header *xid_th; |
| 148 | struct xid2 *xid; |
| 149 | char *xid_id; |
| 150 | struct th_header *rcvd_xid_th; |
| 151 | struct xid2 *rcvd_xid; |
| 152 | char *rcvd_xid_id; |
| 153 | __u8 in_mpcgroup; |
| 154 | fsm_timer sweep_timer; |
| 155 | struct sk_buff_head sweep_queue; |
| 156 | struct th_header *discontact_th; |
| 157 | struct tasklet_struct ch_disc_tasklet; |
| 158 | /* MPC ONLY section end */ |
| 159 | |
| 160 | int retry; /* retry counter for misc. operations */ |
| 161 | fsm_instance *fsm; /* finite state machine of this channel */ |
| 162 | struct net_device *netdev; /* corresponding net_device */ |
| 163 | struct ctcm_profile prof; |
| 164 | unsigned char *trans_skb_data; |
| 165 | __u16 logflags; |
| 166 | }; |
| 167 | |
| 168 | struct ctcm_priv { |
| 169 | struct net_device_stats stats; |
| 170 | unsigned long tbusy; |
| 171 | |
| 172 | /* The MPC group struct of this interface */ |
| 173 | struct mpc_group *mpcg; /* MPC only */ |
| 174 | struct xid2 *xid; /* MPC only */ |
| 175 | |
| 176 | /* The finite state machine of this interface */ |
| 177 | fsm_instance *fsm; |
| 178 | |
| 179 | /* The protocol of this device */ |
| 180 | __u16 protocol; |
| 181 | |
| 182 | /* Timer for restarting after I/O Errors */ |
| 183 | fsm_timer restart_timer; |
| 184 | |
| 185 | int buffer_size; /* ctc only */ |
| 186 | |
| 187 | struct channel *channel[2]; |
| 188 | }; |
| 189 | |
| 190 | int ctcm_open(struct net_device *dev); |
| 191 | int ctcm_close(struct net_device *dev); |
| 192 | |
| 193 | /* |
| 194 | * prototypes for non-static sysfs functions |
| 195 | */ |
| 196 | int ctcm_add_attributes(struct device *dev); |
| 197 | void ctcm_remove_attributes(struct device *dev); |
| 198 | int ctcm_add_files(struct device *dev); |
| 199 | void ctcm_remove_files(struct device *dev); |
| 200 | |
| 201 | /* |
| 202 | * Compatibility macros for busy handling |
| 203 | * of network devices. |
| 204 | */ |
| 205 | static inline void ctcm_clear_busy_do(struct net_device *dev) |
| 206 | { |
| 207 | clear_bit(0, &(((struct ctcm_priv *)dev->priv)->tbusy)); |
| 208 | netif_wake_queue(dev); |
| 209 | } |
| 210 | |
| 211 | static inline void ctcm_clear_busy(struct net_device *dev) |
| 212 | { |
| 213 | struct mpc_group *grp; |
| 214 | grp = ((struct ctcm_priv *)dev->priv)->mpcg; |
| 215 | |
| 216 | if (!(grp && grp->in_sweep)) |
| 217 | ctcm_clear_busy_do(dev); |
| 218 | } |
| 219 | |
| 220 | |
| 221 | static inline int ctcm_test_and_set_busy(struct net_device *dev) |
| 222 | { |
| 223 | netif_stop_queue(dev); |
| 224 | return test_and_set_bit(0, &(((struct ctcm_priv *)dev->priv)->tbusy)); |
| 225 | } |
| 226 | |
| 227 | extern int loglevel; |
| 228 | extern struct channel *channels; |
| 229 | |
| 230 | void ctcm_unpack_skb(struct channel *ch, struct sk_buff *pskb); |
| 231 | |
| 232 | /* |
| 233 | * Functions related to setup and device detection. |
| 234 | */ |
| 235 | |
| 236 | static inline int ctcm_less_than(char *id1, char *id2) |
| 237 | { |
| 238 | unsigned long dev1, dev2; |
| 239 | |
| 240 | id1 = id1 + 5; |
| 241 | id2 = id2 + 5; |
| 242 | |
| 243 | dev1 = simple_strtoul(id1, &id1, 16); |
| 244 | dev2 = simple_strtoul(id2, &id2, 16); |
| 245 | |
| 246 | return (dev1 < dev2); |
| 247 | } |
| 248 | |
| 249 | int ctcm_ch_alloc_buffer(struct channel *ch); |
| 250 | |
| 251 | static inline int ctcm_checkalloc_buffer(struct channel *ch) |
| 252 | { |
| 253 | if (ch->trans_skb == NULL) |
| 254 | return ctcm_ch_alloc_buffer(ch); |
| 255 | if (ch->flags & CHANNEL_FLAGS_BUFSIZE_CHANGED) { |
| 256 | dev_kfree_skb(ch->trans_skb); |
| 257 | return ctcm_ch_alloc_buffer(ch); |
| 258 | } |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv); |
| 263 | |
| 264 | /* test if protocol attribute (of struct ctcm_priv or struct channel) |
| 265 | * has MPC protocol setting. Type is not checked |
| 266 | */ |
| 267 | #define IS_MPC(p) ((p)->protocol == CTCM_PROTO_MPC) |
| 268 | |
| 269 | /* test if struct ctcm_priv of struct net_device has MPC protocol setting */ |
| 270 | #define IS_MPCDEV(d) IS_MPC((struct ctcm_priv *)d->priv) |
| 271 | |
| 272 | static inline gfp_t gfp_type(void) |
| 273 | { |
| 274 | return in_interrupt() ? GFP_ATOMIC : GFP_KERNEL; |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * Definition of our link level header. |
| 279 | */ |
| 280 | struct ll_header { |
| 281 | __u16 length; |
| 282 | __u16 type; |
| 283 | __u16 unused; |
| 284 | }; |
| 285 | #define LL_HEADER_LENGTH (sizeof(struct ll_header)) |
| 286 | |
| 287 | #endif |