Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1 | /* |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2 | * Copyright IBM Corp. 2001, 2007 |
| 3 | * Authors: Fritz Elfert (felfert@millenux.com) |
| 4 | * Peter Tiedemann (ptiedem@de.ibm.com) |
| 5 | * MPC additions : |
| 6 | * Belinda Thompson (belindat@us.ibm.com) |
| 7 | * Andy Richter (richtera@us.ibm.com) |
| 8 | */ |
| 9 | |
| 10 | #undef DEBUG |
| 11 | #undef DEBUGDATA |
| 12 | #undef DEBUGCCW |
| 13 | |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 14 | #define KMSG_COMPONENT "ctcm" |
| 15 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 16 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/timer.h> |
| 25 | #include <linux/bitops.h> |
| 26 | |
| 27 | #include <linux/signal.h> |
| 28 | #include <linux/string.h> |
| 29 | |
| 30 | #include <linux/ip.h> |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/tcp.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <linux/ctype.h> |
| 35 | #include <net/dst.h> |
| 36 | |
| 37 | #include <linux/io.h> |
| 38 | #include <asm/ccwdev.h> |
| 39 | #include <asm/ccwgroup.h> |
| 40 | #include <linux/uaccess.h> |
| 41 | |
| 42 | #include <asm/idals.h> |
| 43 | |
| 44 | #include "fsm.h" |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 45 | |
| 46 | #include "ctcm_dbug.h" |
| 47 | #include "ctcm_main.h" |
| 48 | #include "ctcm_fsms.h" |
| 49 | |
| 50 | const char *dev_state_names[] = { |
| 51 | [DEV_STATE_STOPPED] = "Stopped", |
| 52 | [DEV_STATE_STARTWAIT_RXTX] = "StartWait RXTX", |
| 53 | [DEV_STATE_STARTWAIT_RX] = "StartWait RX", |
| 54 | [DEV_STATE_STARTWAIT_TX] = "StartWait TX", |
| 55 | [DEV_STATE_STOPWAIT_RXTX] = "StopWait RXTX", |
| 56 | [DEV_STATE_STOPWAIT_RX] = "StopWait RX", |
| 57 | [DEV_STATE_STOPWAIT_TX] = "StopWait TX", |
| 58 | [DEV_STATE_RUNNING] = "Running", |
| 59 | }; |
| 60 | |
| 61 | const char *dev_event_names[] = { |
| 62 | [DEV_EVENT_START] = "Start", |
| 63 | [DEV_EVENT_STOP] = "Stop", |
| 64 | [DEV_EVENT_RXUP] = "RX up", |
| 65 | [DEV_EVENT_TXUP] = "TX up", |
| 66 | [DEV_EVENT_RXDOWN] = "RX down", |
| 67 | [DEV_EVENT_TXDOWN] = "TX down", |
| 68 | [DEV_EVENT_RESTART] = "Restart", |
| 69 | }; |
| 70 | |
| 71 | const char *ctc_ch_event_names[] = { |
| 72 | [CTC_EVENT_IO_SUCCESS] = "ccw_device success", |
| 73 | [CTC_EVENT_IO_EBUSY] = "ccw_device busy", |
| 74 | [CTC_EVENT_IO_ENODEV] = "ccw_device enodev", |
| 75 | [CTC_EVENT_IO_UNKNOWN] = "ccw_device unknown", |
| 76 | [CTC_EVENT_ATTNBUSY] = "Status ATTN & BUSY", |
| 77 | [CTC_EVENT_ATTN] = "Status ATTN", |
| 78 | [CTC_EVENT_BUSY] = "Status BUSY", |
| 79 | [CTC_EVENT_UC_RCRESET] = "Unit check remote reset", |
| 80 | [CTC_EVENT_UC_RSRESET] = "Unit check remote system reset", |
| 81 | [CTC_EVENT_UC_TXTIMEOUT] = "Unit check TX timeout", |
| 82 | [CTC_EVENT_UC_TXPARITY] = "Unit check TX parity", |
| 83 | [CTC_EVENT_UC_HWFAIL] = "Unit check Hardware failure", |
| 84 | [CTC_EVENT_UC_RXPARITY] = "Unit check RX parity", |
| 85 | [CTC_EVENT_UC_ZERO] = "Unit check ZERO", |
| 86 | [CTC_EVENT_UC_UNKNOWN] = "Unit check Unknown", |
| 87 | [CTC_EVENT_SC_UNKNOWN] = "SubChannel check Unknown", |
| 88 | [CTC_EVENT_MC_FAIL] = "Machine check failure", |
| 89 | [CTC_EVENT_MC_GOOD] = "Machine check operational", |
| 90 | [CTC_EVENT_IRQ] = "IRQ normal", |
| 91 | [CTC_EVENT_FINSTAT] = "IRQ final", |
| 92 | [CTC_EVENT_TIMER] = "Timer", |
| 93 | [CTC_EVENT_START] = "Start", |
| 94 | [CTC_EVENT_STOP] = "Stop", |
| 95 | /* |
| 96 | * additional MPC events |
| 97 | */ |
| 98 | [CTC_EVENT_SEND_XID] = "XID Exchange", |
| 99 | [CTC_EVENT_RSWEEP_TIMER] = "MPC Group Sweep Timer", |
| 100 | }; |
| 101 | |
| 102 | const char *ctc_ch_state_names[] = { |
| 103 | [CTC_STATE_IDLE] = "Idle", |
| 104 | [CTC_STATE_STOPPED] = "Stopped", |
| 105 | [CTC_STATE_STARTWAIT] = "StartWait", |
| 106 | [CTC_STATE_STARTRETRY] = "StartRetry", |
| 107 | [CTC_STATE_SETUPWAIT] = "SetupWait", |
| 108 | [CTC_STATE_RXINIT] = "RX init", |
| 109 | [CTC_STATE_TXINIT] = "TX init", |
| 110 | [CTC_STATE_RX] = "RX", |
| 111 | [CTC_STATE_TX] = "TX", |
| 112 | [CTC_STATE_RXIDLE] = "RX idle", |
| 113 | [CTC_STATE_TXIDLE] = "TX idle", |
| 114 | [CTC_STATE_RXERR] = "RX error", |
| 115 | [CTC_STATE_TXERR] = "TX error", |
| 116 | [CTC_STATE_TERM] = "Terminating", |
| 117 | [CTC_STATE_DTERM] = "Restarting", |
| 118 | [CTC_STATE_NOTOP] = "Not operational", |
| 119 | /* |
| 120 | * additional MPC states |
| 121 | */ |
| 122 | [CH_XID0_PENDING] = "Pending XID0 Start", |
| 123 | [CH_XID0_INPROGRESS] = "In XID0 Negotiations ", |
| 124 | [CH_XID7_PENDING] = "Pending XID7 P1 Start", |
| 125 | [CH_XID7_PENDING1] = "Active XID7 P1 Exchange ", |
| 126 | [CH_XID7_PENDING2] = "Pending XID7 P2 Start ", |
| 127 | [CH_XID7_PENDING3] = "Active XID7 P2 Exchange ", |
| 128 | [CH_XID7_PENDING4] = "XID7 Complete - Pending READY ", |
| 129 | }; |
| 130 | |
| 131 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg); |
| 132 | |
| 133 | /* |
| 134 | * ----- static ctcm actions for channel statemachine ----- |
| 135 | * |
| 136 | */ |
| 137 | static void chx_txdone(fsm_instance *fi, int event, void *arg); |
| 138 | static void chx_rx(fsm_instance *fi, int event, void *arg); |
| 139 | static void chx_rxidle(fsm_instance *fi, int event, void *arg); |
| 140 | static void chx_firstio(fsm_instance *fi, int event, void *arg); |
| 141 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); |
| 142 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); |
| 143 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); |
| 144 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); |
| 145 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); |
| 146 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); |
| 147 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); |
| 148 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); |
| 149 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); |
| 150 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); |
| 151 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); |
| 152 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); |
| 153 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); |
| 154 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); |
| 155 | |
| 156 | /* |
| 157 | * ----- static ctcmpc actions for ctcmpc channel statemachine ----- |
| 158 | * |
| 159 | */ |
| 160 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg); |
| 161 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg); |
| 162 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg); |
| 163 | /* shared : |
| 164 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg); |
| 165 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg); |
| 166 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg); |
| 167 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg); |
| 168 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg); |
| 169 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg); |
| 170 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg); |
| 171 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg); |
| 172 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg); |
| 173 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg); |
| 174 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg); |
| 175 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg); |
| 176 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg); |
| 177 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg); |
| 178 | */ |
| 179 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg); |
| 180 | static void ctcmpc_chx_attnbusy(fsm_instance *, int, void *); |
| 181 | static void ctcmpc_chx_resend(fsm_instance *, int, void *); |
| 182 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg); |
| 183 | |
| 184 | /** |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 185 | * Check return code of a preceding ccw_device call, halt_IO etc... |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 186 | * |
| 187 | * ch : The channel, the error belongs to. |
| 188 | * Returns the error code (!= 0) to inspect. |
| 189 | */ |
| 190 | void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg) |
| 191 | { |
| 192 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 193 | "%s(%s): %s: %04x\n", |
| 194 | CTCM_FUNTAIL, ch->id, msg, rc); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 195 | switch (rc) { |
| 196 | case -EBUSY: |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 197 | pr_info("%s: The communication peer is busy\n", |
| 198 | ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 199 | fsm_event(ch->fsm, CTC_EVENT_IO_EBUSY, ch); |
| 200 | break; |
| 201 | case -ENODEV: |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 202 | pr_err("%s: The specified target device is not valid\n", |
| 203 | ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 204 | fsm_event(ch->fsm, CTC_EVENT_IO_ENODEV, ch); |
| 205 | break; |
| 206 | default: |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 207 | pr_err("An I/O operation resulted in error %04x\n", |
| 208 | rc); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 209 | fsm_event(ch->fsm, CTC_EVENT_IO_UNKNOWN, ch); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | void ctcm_purge_skb_queue(struct sk_buff_head *q) |
| 214 | { |
| 215 | struct sk_buff *skb; |
| 216 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 217 | CTCM_DBF_TEXT(TRACE, CTC_DBF_DEBUG, __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 218 | |
| 219 | while ((skb = skb_dequeue(q))) { |
| 220 | atomic_dec(&skb->users); |
| 221 | dev_kfree_skb_any(skb); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * NOP action for statemachines |
| 227 | */ |
| 228 | static void ctcm_action_nop(fsm_instance *fi, int event, void *arg) |
| 229 | { |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * Actions for channel - statemachines. |
| 234 | */ |
| 235 | |
| 236 | /** |
| 237 | * Normal data has been send. Free the corresponding |
| 238 | * skb (it's in io_queue), reset dev->tbusy and |
| 239 | * revert to idle state. |
| 240 | * |
| 241 | * fi An instance of a channel statemachine. |
| 242 | * event The event, just happened. |
| 243 | * arg Generic pointer, casted from channel * upon call. |
| 244 | */ |
| 245 | static void chx_txdone(fsm_instance *fi, int event, void *arg) |
| 246 | { |
| 247 | struct channel *ch = arg; |
| 248 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 249 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 250 | struct sk_buff *skb; |
| 251 | int first = 1; |
| 252 | int i; |
| 253 | unsigned long duration; |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 254 | unsigned long done_stamp = jiffies; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 255 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 256 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
| 257 | |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 258 | duration = done_stamp - ch->prof.send_stamp; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 259 | if (duration > ch->prof.tx_time) |
| 260 | ch->prof.tx_time = duration; |
| 261 | |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 262 | if (ch->irb->scsw.cmd.count != 0) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 263 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
| 264 | "%s(%s): TX not complete, remaining %d bytes", |
| 265 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 266 | fsm_deltimer(&ch->timer); |
| 267 | while ((skb = skb_dequeue(&ch->io_queue))) { |
| 268 | priv->stats.tx_packets++; |
| 269 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; |
| 270 | if (first) { |
| 271 | priv->stats.tx_bytes += 2; |
| 272 | first = 0; |
| 273 | } |
| 274 | atomic_dec(&skb->users); |
| 275 | dev_kfree_skb_irq(skb); |
| 276 | } |
| 277 | spin_lock(&ch->collect_lock); |
| 278 | clear_normalized_cda(&ch->ccw[4]); |
| 279 | if (ch->collect_len > 0) { |
| 280 | int rc; |
| 281 | |
| 282 | if (ctcm_checkalloc_buffer(ch)) { |
| 283 | spin_unlock(&ch->collect_lock); |
| 284 | return; |
| 285 | } |
| 286 | ch->trans_skb->data = ch->trans_skb_data; |
| 287 | skb_reset_tail_pointer(ch->trans_skb); |
| 288 | ch->trans_skb->len = 0; |
| 289 | if (ch->prof.maxmulti < (ch->collect_len + 2)) |
| 290 | ch->prof.maxmulti = ch->collect_len + 2; |
| 291 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) |
| 292 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); |
| 293 | *((__u16 *)skb_put(ch->trans_skb, 2)) = ch->collect_len + 2; |
| 294 | i = 0; |
| 295 | while ((skb = skb_dequeue(&ch->collect_queue))) { |
| 296 | skb_copy_from_linear_data(skb, |
| 297 | skb_put(ch->trans_skb, skb->len), skb->len); |
| 298 | priv->stats.tx_packets++; |
| 299 | priv->stats.tx_bytes += skb->len - LL_HEADER_LENGTH; |
| 300 | atomic_dec(&skb->users); |
| 301 | dev_kfree_skb_irq(skb); |
| 302 | i++; |
| 303 | } |
| 304 | ch->collect_len = 0; |
| 305 | spin_unlock(&ch->collect_lock); |
| 306 | ch->ccw[1].count = ch->trans_skb->len; |
| 307 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 308 | ch->prof.send_stamp = jiffies; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 309 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 310 | (unsigned long)ch, 0xff, 0); |
| 311 | ch->prof.doios_multi++; |
| 312 | if (rc != 0) { |
| 313 | priv->stats.tx_dropped += i; |
| 314 | priv->stats.tx_errors += i; |
| 315 | fsm_deltimer(&ch->timer); |
| 316 | ctcm_ccw_check_rc(ch, rc, "chained TX"); |
| 317 | } |
| 318 | } else { |
| 319 | spin_unlock(&ch->collect_lock); |
| 320 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
| 321 | } |
| 322 | ctcm_clear_busy_do(dev); |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Initial data is sent. |
| 327 | * Notify device statemachine that we are up and |
| 328 | * running. |
| 329 | * |
| 330 | * fi An instance of a channel statemachine. |
| 331 | * event The event, just happened. |
| 332 | * arg Generic pointer, casted from channel * upon call. |
| 333 | */ |
| 334 | void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg) |
| 335 | { |
| 336 | struct channel *ch = arg; |
| 337 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 338 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 339 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 340 | CTCM_PR_DEBUG("%s(%s): %s\n", __func__, ch->id, dev->name); |
| 341 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 342 | fsm_deltimer(&ch->timer); |
| 343 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
| 344 | fsm_event(priv->fsm, DEV_EVENT_TXUP, ch->netdev); |
| 345 | } |
| 346 | |
| 347 | /** |
| 348 | * Got normal data, check for sanity, queue it up, allocate new buffer |
| 349 | * trigger bottom half, and initiate next read. |
| 350 | * |
| 351 | * fi An instance of a channel statemachine. |
| 352 | * event The event, just happened. |
| 353 | * arg Generic pointer, casted from channel * upon call. |
| 354 | */ |
| 355 | static void chx_rx(fsm_instance *fi, int event, void *arg) |
| 356 | { |
| 357 | struct channel *ch = arg; |
| 358 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 359 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 360 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 361 | struct sk_buff *skb = ch->trans_skb; |
| 362 | __u16 block_len = *((__u16 *)skb->data); |
| 363 | int check_len; |
| 364 | int rc; |
| 365 | |
| 366 | fsm_deltimer(&ch->timer); |
| 367 | if (len < 8) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 368 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 369 | "%s(%s): got packet with length %d < 8\n", |
| 370 | CTCM_FUNTAIL, dev->name, len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 371 | priv->stats.rx_dropped++; |
| 372 | priv->stats.rx_length_errors++; |
| 373 | goto again; |
| 374 | } |
| 375 | if (len > ch->max_bufsize) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 376 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 377 | "%s(%s): got packet with length %d > %d\n", |
| 378 | CTCM_FUNTAIL, dev->name, len, ch->max_bufsize); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 379 | priv->stats.rx_dropped++; |
| 380 | priv->stats.rx_length_errors++; |
| 381 | goto again; |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * VM TCP seems to have a bug sending 2 trailing bytes of garbage. |
| 386 | */ |
| 387 | switch (ch->protocol) { |
| 388 | case CTCM_PROTO_S390: |
| 389 | case CTCM_PROTO_OS390: |
| 390 | check_len = block_len + 2; |
| 391 | break; |
| 392 | default: |
| 393 | check_len = block_len; |
| 394 | break; |
| 395 | } |
| 396 | if ((len < block_len) || (len > check_len)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 397 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 398 | "%s(%s): got block length %d != rx length %d\n", |
| 399 | CTCM_FUNTAIL, dev->name, block_len, len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 400 | if (do_debug) |
| 401 | ctcmpc_dump_skb(skb, 0); |
| 402 | |
| 403 | *((__u16 *)skb->data) = len; |
| 404 | priv->stats.rx_dropped++; |
| 405 | priv->stats.rx_length_errors++; |
| 406 | goto again; |
| 407 | } |
Roel Kluin | fb8585f | 2009-03-24 03:27:48 +0000 | [diff] [blame] | 408 | if (block_len > 2) { |
| 409 | *((__u16 *)skb->data) = block_len - 2; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 410 | ctcm_unpack_skb(ch, skb); |
| 411 | } |
| 412 | again: |
| 413 | skb->data = ch->trans_skb_data; |
| 414 | skb_reset_tail_pointer(skb); |
| 415 | skb->len = 0; |
| 416 | if (ctcm_checkalloc_buffer(ch)) |
| 417 | return; |
| 418 | ch->ccw[1].count = ch->max_bufsize; |
| 419 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 420 | (unsigned long)ch, 0xff, 0); |
| 421 | if (rc != 0) |
| 422 | ctcm_ccw_check_rc(ch, rc, "normal RX"); |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Initialize connection by sending a __u16 of value 0. |
| 427 | * |
| 428 | * fi An instance of a channel statemachine. |
| 429 | * event The event, just happened. |
| 430 | * arg Generic pointer, casted from channel * upon call. |
| 431 | */ |
| 432 | static void chx_firstio(fsm_instance *fi, int event, void *arg) |
| 433 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 434 | int rc; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 435 | struct channel *ch = arg; |
| 436 | int fsmstate = fsm_getstate(fi); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 437 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 438 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 439 | "%s(%s) : %02x", |
| 440 | CTCM_FUNTAIL, ch->id, fsmstate); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 441 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 442 | ch->sense_rc = 0; /* reset unit check report control */ |
| 443 | if (fsmstate == CTC_STATE_TXIDLE) |
| 444 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
| 445 | "%s(%s): remote side issued READ?, init.\n", |
| 446 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 447 | fsm_deltimer(&ch->timer); |
| 448 | if (ctcm_checkalloc_buffer(ch)) |
| 449 | return; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 450 | if ((fsmstate == CTC_STATE_SETUPWAIT) && |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 451 | (ch->protocol == CTCM_PROTO_OS390)) { |
| 452 | /* OS/390 resp. z/OS */ |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 453 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 454 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
| 455 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, |
| 456 | CTC_EVENT_TIMER, ch); |
| 457 | chx_rxidle(fi, event, arg); |
| 458 | } else { |
| 459 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 460 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 461 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
| 462 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); |
| 463 | } |
| 464 | return; |
| 465 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 466 | /* |
| 467 | * Don't setup a timer for receiving the initial RX frame |
| 468 | * if in compatibility mode, since VM TCP delays the initial |
| 469 | * frame until it has some data to send. |
| 470 | */ |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 471 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_WRITE) || |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 472 | (ch->protocol != CTCM_PROTO_S390)) |
| 473 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
| 474 | |
| 475 | *((__u16 *)ch->trans_skb->data) = CTCM_INITIAL_BLOCKLEN; |
| 476 | ch->ccw[1].count = 2; /* Transfer only length */ |
| 477 | |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 478 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 479 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
| 480 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 481 | (unsigned long)ch, 0xff, 0); |
| 482 | if (rc != 0) { |
| 483 | fsm_deltimer(&ch->timer); |
| 484 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); |
| 485 | ctcm_ccw_check_rc(ch, rc, "init IO"); |
| 486 | } |
| 487 | /* |
| 488 | * If in compatibility mode since we don't setup a timer, we |
| 489 | * also signal RX channel up immediately. This enables us |
| 490 | * to send packets early which in turn usually triggers some |
| 491 | * reply from VM TCP which brings up the RX channel to it's |
| 492 | * final state. |
| 493 | */ |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 494 | if ((CHANNEL_DIRECTION(ch->flags) == CTCM_READ) && |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 495 | (ch->protocol == CTCM_PROTO_S390)) { |
| 496 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 497 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 498 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * Got initial data, check it. If OK, |
| 504 | * notify device statemachine that we are up and |
| 505 | * running. |
| 506 | * |
| 507 | * fi An instance of a channel statemachine. |
| 508 | * event The event, just happened. |
| 509 | * arg Generic pointer, casted from channel * upon call. |
| 510 | */ |
| 511 | static void chx_rxidle(fsm_instance *fi, int event, void *arg) |
| 512 | { |
| 513 | struct channel *ch = arg; |
| 514 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 515 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 516 | __u16 buflen; |
| 517 | int rc; |
| 518 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 519 | fsm_deltimer(&ch->timer); |
| 520 | buflen = *((__u16 *)ch->trans_skb->data); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 521 | CTCM_PR_DEBUG("%s: %s: Initial RX count = %d\n", |
| 522 | __func__, dev->name, buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 523 | |
| 524 | if (buflen >= CTCM_INITIAL_BLOCKLEN) { |
| 525 | if (ctcm_checkalloc_buffer(ch)) |
| 526 | return; |
| 527 | ch->ccw[1].count = ch->max_bufsize; |
| 528 | fsm_newstate(fi, CTC_STATE_RXIDLE); |
| 529 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 530 | (unsigned long)ch, 0xff, 0); |
| 531 | if (rc != 0) { |
| 532 | fsm_newstate(fi, CTC_STATE_RXINIT); |
| 533 | ctcm_ccw_check_rc(ch, rc, "initial RX"); |
| 534 | } else |
| 535 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
| 536 | } else { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 537 | CTCM_PR_DEBUG("%s: %s: Initial RX count %d not %d\n", |
| 538 | __func__, dev->name, |
| 539 | buflen, CTCM_INITIAL_BLOCKLEN); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 540 | chx_firstio(fi, event, arg); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * Set channel into extended mode. |
| 546 | * |
| 547 | * fi An instance of a channel statemachine. |
| 548 | * event The event, just happened. |
| 549 | * arg Generic pointer, casted from channel * upon call. |
| 550 | */ |
| 551 | static void ctcm_chx_setmode(fsm_instance *fi, int event, void *arg) |
| 552 | { |
| 553 | struct channel *ch = arg; |
| 554 | int rc; |
| 555 | unsigned long saveflags = 0; |
| 556 | int timeout = CTCM_TIME_5_SEC; |
| 557 | |
| 558 | fsm_deltimer(&ch->timer); |
| 559 | if (IS_MPC(ch)) { |
| 560 | timeout = 1500; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 561 | CTCM_PR_DEBUG("enter %s: cp=%i ch=0x%p id=%s\n", |
| 562 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 563 | } |
| 564 | fsm_addtimer(&ch->timer, timeout, CTC_EVENT_TIMER, ch); |
| 565 | fsm_newstate(fi, CTC_STATE_SETUPWAIT); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 566 | CTCM_CCW_DUMP((char *)&ch->ccw[6], sizeof(struct ccw1) * 2); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 567 | |
| 568 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ |
| 569 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 570 | /* Such conditional locking is undeterministic in |
| 571 | * static view. => ignore sparse warnings here. */ |
| 572 | |
| 573 | rc = ccw_device_start(ch->cdev, &ch->ccw[6], |
| 574 | (unsigned long)ch, 0xff, 0); |
| 575 | if (event == CTC_EVENT_TIMER) /* see above comments */ |
| 576 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 577 | if (rc != 0) { |
| 578 | fsm_deltimer(&ch->timer); |
| 579 | fsm_newstate(fi, CTC_STATE_STARTWAIT); |
| 580 | ctcm_ccw_check_rc(ch, rc, "set Mode"); |
| 581 | } else |
| 582 | ch->retry = 0; |
| 583 | } |
| 584 | |
| 585 | /** |
| 586 | * Setup channel. |
| 587 | * |
| 588 | * fi An instance of a channel statemachine. |
| 589 | * event The event, just happened. |
| 590 | * arg Generic pointer, casted from channel * upon call. |
| 591 | */ |
| 592 | static void ctcm_chx_start(fsm_instance *fi, int event, void *arg) |
| 593 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 594 | struct channel *ch = arg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 595 | unsigned long saveflags; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 596 | int rc; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 597 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 598 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_INFO, "%s(%s): %s", |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 599 | CTCM_FUNTAIL, ch->id, |
| 600 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 601 | |
| 602 | if (ch->trans_skb != NULL) { |
| 603 | clear_normalized_cda(&ch->ccw[1]); |
| 604 | dev_kfree_skb(ch->trans_skb); |
| 605 | ch->trans_skb = NULL; |
| 606 | } |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 607 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 608 | ch->ccw[1].cmd_code = CCW_CMD_READ; |
| 609 | ch->ccw[1].flags = CCW_FLAG_SLI; |
| 610 | ch->ccw[1].count = 0; |
| 611 | } else { |
| 612 | ch->ccw[1].cmd_code = CCW_CMD_WRITE; |
| 613 | ch->ccw[1].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 614 | ch->ccw[1].count = 0; |
| 615 | } |
| 616 | if (ctcm_checkalloc_buffer(ch)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 617 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
| 618 | "%s(%s): %s trans_skb alloc delayed " |
| 619 | "until first transfer", |
| 620 | CTCM_FUNTAIL, ch->id, |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 621 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? |
| 622 | "RX" : "TX"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 623 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 624 | ch->ccw[0].cmd_code = CCW_CMD_PREPARE; |
| 625 | ch->ccw[0].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 626 | ch->ccw[0].count = 0; |
| 627 | ch->ccw[0].cda = 0; |
| 628 | ch->ccw[2].cmd_code = CCW_CMD_NOOP; /* jointed CE + DE */ |
| 629 | ch->ccw[2].flags = CCW_FLAG_SLI; |
| 630 | ch->ccw[2].count = 0; |
| 631 | ch->ccw[2].cda = 0; |
| 632 | memcpy(&ch->ccw[3], &ch->ccw[0], sizeof(struct ccw1) * 3); |
| 633 | ch->ccw[4].cda = 0; |
| 634 | ch->ccw[4].flags &= ~CCW_FLAG_IDA; |
| 635 | |
| 636 | fsm_newstate(fi, CTC_STATE_STARTWAIT); |
| 637 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); |
| 638 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 639 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
| 640 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 641 | if (rc != 0) { |
| 642 | if (rc != -EBUSY) |
| 643 | fsm_deltimer(&ch->timer); |
| 644 | ctcm_ccw_check_rc(ch, rc, "initial HaltIO"); |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | /** |
| 649 | * Shutdown a channel. |
| 650 | * |
| 651 | * fi An instance of a channel statemachine. |
| 652 | * event The event, just happened. |
| 653 | * arg Generic pointer, casted from channel * upon call. |
| 654 | */ |
| 655 | static void ctcm_chx_haltio(fsm_instance *fi, int event, void *arg) |
| 656 | { |
| 657 | struct channel *ch = arg; |
| 658 | unsigned long saveflags = 0; |
| 659 | int rc; |
| 660 | int oldstate; |
| 661 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 662 | fsm_deltimer(&ch->timer); |
| 663 | if (IS_MPC(ch)) |
| 664 | fsm_deltimer(&ch->sweep_timer); |
| 665 | |
| 666 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
| 667 | |
| 668 | if (event == CTC_EVENT_STOP) /* only for STOP not yet locked */ |
| 669 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 670 | /* Such conditional locking is undeterministic in |
| 671 | * static view. => ignore sparse warnings here. */ |
| 672 | oldstate = fsm_getstate(fi); |
| 673 | fsm_newstate(fi, CTC_STATE_TERM); |
| 674 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
| 675 | |
| 676 | if (event == CTC_EVENT_STOP) |
| 677 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 678 | /* see remark above about conditional locking */ |
| 679 | |
| 680 | if (rc != 0 && rc != -EBUSY) { |
| 681 | fsm_deltimer(&ch->timer); |
| 682 | if (event != CTC_EVENT_STOP) { |
| 683 | fsm_newstate(fi, oldstate); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 684 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 685 | } |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | /** |
| 690 | * Cleanup helper for chx_fail and chx_stopped |
| 691 | * cleanup channels queue and notify interface statemachine. |
| 692 | * |
| 693 | * fi An instance of a channel statemachine. |
| 694 | * state The next state (depending on caller). |
| 695 | * ch The channel to operate on. |
| 696 | */ |
| 697 | static void ctcm_chx_cleanup(fsm_instance *fi, int state, |
| 698 | struct channel *ch) |
| 699 | { |
| 700 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 701 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 702 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 703 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
| 704 | "%s(%s): %s[%d]\n", |
| 705 | CTCM_FUNTAIL, dev->name, ch->id, state); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 706 | |
| 707 | fsm_deltimer(&ch->timer); |
| 708 | if (IS_MPC(ch)) |
| 709 | fsm_deltimer(&ch->sweep_timer); |
| 710 | |
| 711 | fsm_newstate(fi, state); |
| 712 | if (state == CTC_STATE_STOPPED && ch->trans_skb != NULL) { |
| 713 | clear_normalized_cda(&ch->ccw[1]); |
| 714 | dev_kfree_skb_any(ch->trans_skb); |
| 715 | ch->trans_skb = NULL; |
| 716 | } |
| 717 | |
| 718 | ch->th_seg = 0x00; |
| 719 | ch->th_seq_num = 0x00; |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 720 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 721 | skb_queue_purge(&ch->io_queue); |
| 722 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 723 | } else { |
| 724 | ctcm_purge_skb_queue(&ch->io_queue); |
| 725 | if (IS_MPC(ch)) |
| 726 | ctcm_purge_skb_queue(&ch->sweep_queue); |
| 727 | spin_lock(&ch->collect_lock); |
| 728 | ctcm_purge_skb_queue(&ch->collect_queue); |
| 729 | ch->collect_len = 0; |
| 730 | spin_unlock(&ch->collect_lock); |
| 731 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | /** |
| 736 | * A channel has successfully been halted. |
| 737 | * Cleanup it's queue and notify interface statemachine. |
| 738 | * |
| 739 | * fi An instance of a channel statemachine. |
| 740 | * event The event, just happened. |
| 741 | * arg Generic pointer, casted from channel * upon call. |
| 742 | */ |
| 743 | static void ctcm_chx_stopped(fsm_instance *fi, int event, void *arg) |
| 744 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 745 | ctcm_chx_cleanup(fi, CTC_STATE_STOPPED, arg); |
| 746 | } |
| 747 | |
| 748 | /** |
| 749 | * A stop command from device statemachine arrived and we are in |
| 750 | * not operational mode. Set state to stopped. |
| 751 | * |
| 752 | * fi An instance of a channel statemachine. |
| 753 | * event The event, just happened. |
| 754 | * arg Generic pointer, casted from channel * upon call. |
| 755 | */ |
| 756 | static void ctcm_chx_stop(fsm_instance *fi, int event, void *arg) |
| 757 | { |
| 758 | fsm_newstate(fi, CTC_STATE_STOPPED); |
| 759 | } |
| 760 | |
| 761 | /** |
| 762 | * A machine check for no path, not operational status or gone device has |
| 763 | * happened. |
| 764 | * Cleanup queue and notify interface statemachine. |
| 765 | * |
| 766 | * fi An instance of a channel statemachine. |
| 767 | * event The event, just happened. |
| 768 | * arg Generic pointer, casted from channel * upon call. |
| 769 | */ |
| 770 | static void ctcm_chx_fail(fsm_instance *fi, int event, void *arg) |
| 771 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 772 | ctcm_chx_cleanup(fi, CTC_STATE_NOTOP, arg); |
| 773 | } |
| 774 | |
| 775 | /** |
| 776 | * Handle error during setup of channel. |
| 777 | * |
| 778 | * fi An instance of a channel statemachine. |
| 779 | * event The event, just happened. |
| 780 | * arg Generic pointer, casted from channel * upon call. |
| 781 | */ |
| 782 | static void ctcm_chx_setuperr(fsm_instance *fi, int event, void *arg) |
| 783 | { |
| 784 | struct channel *ch = arg; |
| 785 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 786 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 787 | |
| 788 | /* |
| 789 | * Special case: Got UC_RCRESET on setmode. |
| 790 | * This means that remote side isn't setup. In this case |
| 791 | * simply retry after some 10 secs... |
| 792 | */ |
| 793 | if ((fsm_getstate(fi) == CTC_STATE_SETUPWAIT) && |
| 794 | ((event == CTC_EVENT_UC_RCRESET) || |
| 795 | (event == CTC_EVENT_UC_RSRESET))) { |
| 796 | fsm_newstate(fi, CTC_STATE_STARTRETRY); |
| 797 | fsm_deltimer(&ch->timer); |
| 798 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 799 | if (!IS_MPC(ch) && |
| 800 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ)) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 801 | int rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
| 802 | if (rc != 0) |
| 803 | ctcm_ccw_check_rc(ch, rc, |
| 804 | "HaltIO in chx_setuperr"); |
| 805 | } |
| 806 | return; |
| 807 | } |
| 808 | |
| 809 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_CRIT, |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 810 | "%s(%s) : %s error during %s channel setup state=%s\n", |
| 811 | CTCM_FUNTAIL, dev->name, ctc_ch_event_names[event], |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 812 | (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) ? "RX" : "TX", |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 813 | fsm_getstate_str(fi)); |
| 814 | |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 815 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 816 | fsm_newstate(fi, CTC_STATE_RXERR); |
| 817 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 818 | } else { |
| 819 | fsm_newstate(fi, CTC_STATE_TXERR); |
| 820 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 821 | } |
| 822 | } |
| 823 | |
| 824 | /** |
| 825 | * Restart a channel after an error. |
| 826 | * |
| 827 | * fi An instance of a channel statemachine. |
| 828 | * event The event, just happened. |
| 829 | * arg Generic pointer, casted from channel * upon call. |
| 830 | */ |
| 831 | static void ctcm_chx_restart(fsm_instance *fi, int event, void *arg) |
| 832 | { |
| 833 | struct channel *ch = arg; |
| 834 | struct net_device *dev = ch->netdev; |
| 835 | unsigned long saveflags = 0; |
| 836 | int oldstate; |
| 837 | int rc; |
| 838 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 839 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 840 | "%s: %s[%d] of %s\n", |
| 841 | CTCM_FUNTAIL, ch->id, event, dev->name); |
| 842 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 843 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 844 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 845 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
| 846 | oldstate = fsm_getstate(fi); |
| 847 | fsm_newstate(fi, CTC_STATE_STARTWAIT); |
| 848 | if (event == CTC_EVENT_TIMER) /* only for timer not yet locked */ |
| 849 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 850 | /* Such conditional locking is a known problem for |
| 851 | * sparse because its undeterministic in static view. |
| 852 | * Warnings should be ignored here. */ |
| 853 | rc = ccw_device_halt(ch->cdev, (unsigned long)ch); |
| 854 | if (event == CTC_EVENT_TIMER) |
| 855 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 856 | if (rc != 0) { |
| 857 | if (rc != -EBUSY) { |
| 858 | fsm_deltimer(&ch->timer); |
| 859 | fsm_newstate(fi, oldstate); |
| 860 | } |
| 861 | ctcm_ccw_check_rc(ch, rc, "HaltIO in ctcm_chx_restart"); |
| 862 | } |
| 863 | } |
| 864 | |
| 865 | /** |
| 866 | * Handle error during RX initial handshake (exchange of |
| 867 | * 0-length block header) |
| 868 | * |
| 869 | * fi An instance of a channel statemachine. |
| 870 | * event The event, just happened. |
| 871 | * arg Generic pointer, casted from channel * upon call. |
| 872 | */ |
| 873 | static void ctcm_chx_rxiniterr(fsm_instance *fi, int event, void *arg) |
| 874 | { |
| 875 | struct channel *ch = arg; |
| 876 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 877 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 878 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 879 | if (event == CTC_EVENT_TIMER) { |
| 880 | if (!IS_MPCDEV(dev)) |
| 881 | /* TODO : check if MPC deletes timer somewhere */ |
| 882 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 883 | if (ch->retry++ < 3) |
| 884 | ctcm_chx_restart(fi, event, arg); |
| 885 | else { |
| 886 | fsm_newstate(fi, CTC_STATE_RXERR); |
| 887 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 888 | } |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 889 | } else { |
| 890 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
| 891 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, |
| 892 | ctc_ch_event_names[event], fsm_getstate_str(fi)); |
| 893 | |
| 894 | dev_warn(&dev->dev, |
| 895 | "Initialization failed with RX/TX init handshake " |
| 896 | "error %s\n", ctc_ch_event_names[event]); |
| 897 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 898 | } |
| 899 | |
| 900 | /** |
| 901 | * Notify device statemachine if we gave up initialization |
| 902 | * of RX channel. |
| 903 | * |
| 904 | * fi An instance of a channel statemachine. |
| 905 | * event The event, just happened. |
| 906 | * arg Generic pointer, casted from channel * upon call. |
| 907 | */ |
| 908 | static void ctcm_chx_rxinitfail(fsm_instance *fi, int event, void *arg) |
| 909 | { |
| 910 | struct channel *ch = arg; |
| 911 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 912 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 913 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 914 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
| 915 | "%s(%s): RX %s busy, init. fail", |
| 916 | CTCM_FUNTAIL, dev->name, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 917 | fsm_newstate(fi, CTC_STATE_RXERR); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 918 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 919 | } |
| 920 | |
| 921 | /** |
| 922 | * Handle RX Unit check remote reset (remote disconnected) |
| 923 | * |
| 924 | * fi An instance of a channel statemachine. |
| 925 | * event The event, just happened. |
| 926 | * arg Generic pointer, casted from channel * upon call. |
| 927 | */ |
| 928 | static void ctcm_chx_rxdisc(fsm_instance *fi, int event, void *arg) |
| 929 | { |
| 930 | struct channel *ch = arg; |
| 931 | struct channel *ch2; |
| 932 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 933 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 934 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 935 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_NOTICE, |
| 936 | "%s: %s: remote disconnect - re-init ...", |
| 937 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 938 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 939 | /* |
| 940 | * Notify device statemachine |
| 941 | */ |
| 942 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 943 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 944 | |
| 945 | fsm_newstate(fi, CTC_STATE_DTERM); |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 946 | ch2 = priv->channel[CTCM_WRITE]; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 947 | fsm_newstate(ch2->fsm, CTC_STATE_DTERM); |
| 948 | |
| 949 | ccw_device_halt(ch->cdev, (unsigned long)ch); |
| 950 | ccw_device_halt(ch2->cdev, (unsigned long)ch2); |
| 951 | } |
| 952 | |
| 953 | /** |
| 954 | * Handle error during TX channel initialization. |
| 955 | * |
| 956 | * fi An instance of a channel statemachine. |
| 957 | * event The event, just happened. |
| 958 | * arg Generic pointer, casted from channel * upon call. |
| 959 | */ |
| 960 | static void ctcm_chx_txiniterr(fsm_instance *fi, int event, void *arg) |
| 961 | { |
| 962 | struct channel *ch = arg; |
| 963 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 964 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 965 | |
| 966 | if (event == CTC_EVENT_TIMER) { |
| 967 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 968 | if (ch->retry++ < 3) |
| 969 | ctcm_chx_restart(fi, event, arg); |
| 970 | else { |
| 971 | fsm_newstate(fi, CTC_STATE_TXERR); |
| 972 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 973 | } |
| 974 | } else { |
| 975 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 976 | "%s(%s): %s in %s", CTCM_FUNTAIL, ch->id, |
| 977 | ctc_ch_event_names[event], fsm_getstate_str(fi)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 978 | |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 979 | dev_warn(&dev->dev, |
| 980 | "Initialization failed with RX/TX init handshake " |
| 981 | "error %s\n", ctc_ch_event_names[event]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 982 | } |
| 983 | } |
| 984 | |
| 985 | /** |
| 986 | * Handle TX timeout by retrying operation. |
| 987 | * |
| 988 | * fi An instance of a channel statemachine. |
| 989 | * event The event, just happened. |
| 990 | * arg Generic pointer, casted from channel * upon call. |
| 991 | */ |
| 992 | static void ctcm_chx_txretry(fsm_instance *fi, int event, void *arg) |
| 993 | { |
| 994 | struct channel *ch = arg; |
| 995 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 996 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 997 | struct sk_buff *skb; |
| 998 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 999 | CTCM_PR_DEBUG("Enter: %s: cp=%i ch=0x%p id=%s\n", |
| 1000 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1001 | |
| 1002 | fsm_deltimer(&ch->timer); |
| 1003 | if (ch->retry++ > 3) { |
| 1004 | struct mpc_group *gptr = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1005 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
| 1006 | "%s: %s: retries exceeded", |
| 1007 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1008 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 1009 | /* call restart if not MPC or if MPC and mpcg fsm is ready. |
| 1010 | use gptr as mpc indicator */ |
| 1011 | if (!(gptr && (fsm_getstate(gptr->fsm) != MPCG_STATE_READY))) |
| 1012 | ctcm_chx_restart(fi, event, arg); |
| 1013 | goto done; |
| 1014 | } |
| 1015 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1016 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_DEBUG, |
| 1017 | "%s : %s: retry %d", |
| 1018 | CTCM_FUNTAIL, ch->id, ch->retry); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1019 | skb = skb_peek(&ch->io_queue); |
| 1020 | if (skb) { |
| 1021 | int rc = 0; |
| 1022 | unsigned long saveflags = 0; |
| 1023 | clear_normalized_cda(&ch->ccw[4]); |
| 1024 | ch->ccw[4].count = skb->len; |
| 1025 | if (set_normalized_cda(&ch->ccw[4], skb->data)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1026 | CTCM_DBF_TEXT_(TRACE, CTC_DBF_INFO, |
| 1027 | "%s: %s: IDAL alloc failed", |
| 1028 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1029 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 1030 | ctcm_chx_restart(fi, event, arg); |
| 1031 | goto done; |
| 1032 | } |
| 1033 | fsm_addtimer(&ch->timer, 1000, CTC_EVENT_TIMER, ch); |
| 1034 | if (event == CTC_EVENT_TIMER) /* for TIMER not yet locked */ |
| 1035 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1036 | /* Such conditional locking is a known problem for |
| 1037 | * sparse because its undeterministic in static view. |
| 1038 | * Warnings should be ignored here. */ |
| 1039 | if (do_debug_ccw) |
| 1040 | ctcmpc_dumpit((char *)&ch->ccw[3], |
| 1041 | sizeof(struct ccw1) * 3); |
| 1042 | |
| 1043 | rc = ccw_device_start(ch->cdev, &ch->ccw[3], |
| 1044 | (unsigned long)ch, 0xff, 0); |
| 1045 | if (event == CTC_EVENT_TIMER) |
| 1046 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), |
| 1047 | saveflags); |
| 1048 | if (rc != 0) { |
| 1049 | fsm_deltimer(&ch->timer); |
| 1050 | ctcm_ccw_check_rc(ch, rc, "TX in chx_txretry"); |
| 1051 | ctcm_purge_skb_queue(&ch->io_queue); |
| 1052 | } |
| 1053 | } |
| 1054 | done: |
| 1055 | return; |
| 1056 | } |
| 1057 | |
| 1058 | /** |
| 1059 | * Handle fatal errors during an I/O command. |
| 1060 | * |
| 1061 | * fi An instance of a channel statemachine. |
| 1062 | * event The event, just happened. |
| 1063 | * arg Generic pointer, casted from channel * upon call. |
| 1064 | */ |
| 1065 | static void ctcm_chx_iofatal(fsm_instance *fi, int event, void *arg) |
| 1066 | { |
| 1067 | struct channel *ch = arg; |
| 1068 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1069 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1070 | int rd = CHANNEL_DIRECTION(ch->flags); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1071 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1072 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1073 | CTCM_DBF_TEXT_(ERROR, CTC_DBF_ERROR, |
| 1074 | "%s: %s: %s unrecoverable channel error", |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 1075 | CTCM_FUNTAIL, ch->id, rd == CTCM_READ ? "RX" : "TX"); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1076 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1077 | if (IS_MPC(ch)) { |
| 1078 | priv->stats.tx_dropped++; |
| 1079 | priv->stats.tx_errors++; |
| 1080 | } |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 1081 | if (rd == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1082 | fsm_newstate(fi, CTC_STATE_RXERR); |
| 1083 | fsm_event(priv->fsm, DEV_EVENT_RXDOWN, dev); |
| 1084 | } else { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1085 | fsm_newstate(fi, CTC_STATE_TXERR); |
| 1086 | fsm_event(priv->fsm, DEV_EVENT_TXDOWN, dev); |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | /* |
| 1091 | * The ctcm statemachine for a channel. |
| 1092 | */ |
| 1093 | const fsm_node ch_fsm[] = { |
| 1094 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, |
| 1095 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, |
| 1096 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1097 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
| 1098 | |
| 1099 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, |
| 1100 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, |
| 1101 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1102 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
| 1103 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, |
| 1104 | |
| 1105 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1106 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1107 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
| 1108 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, |
| 1109 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1110 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1111 | |
| 1112 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1113 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
| 1114 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1115 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1116 | |
| 1117 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1118 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1119 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, chx_firstio }, |
| 1120 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1121 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1122 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
| 1123 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1124 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1125 | |
| 1126 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1127 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1128 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, chx_rxidle }, |
| 1129 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, |
| 1130 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, |
| 1131 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, |
| 1132 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, |
| 1133 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1134 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, chx_firstio }, |
| 1135 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1136 | |
| 1137 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1138 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
| 1139 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, chx_rx }, |
| 1140 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, |
| 1141 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1142 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1143 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, chx_rx }, |
| 1144 | |
| 1145 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1146 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1147 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, |
| 1148 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, |
| 1149 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, |
| 1150 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, |
| 1151 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1152 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1153 | |
| 1154 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1155 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
| 1156 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, chx_firstio }, |
| 1157 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
| 1158 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
| 1159 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1160 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1161 | |
| 1162 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, |
| 1163 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, |
| 1164 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, |
| 1165 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
| 1166 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
| 1167 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1168 | |
| 1169 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1170 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, |
| 1171 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
| 1172 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
| 1173 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
| 1174 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1175 | |
| 1176 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1177 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, |
| 1178 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, chx_txdone }, |
| 1179 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_txretry }, |
| 1180 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_txretry }, |
| 1181 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, |
| 1182 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1183 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1184 | |
| 1185 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1186 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1187 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1188 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1189 | }; |
| 1190 | |
| 1191 | int ch_fsm_len = ARRAY_SIZE(ch_fsm); |
| 1192 | |
| 1193 | /* |
| 1194 | * MPC actions for mpc channel statemachine |
| 1195 | * handling of MPC protocol requires extra |
| 1196 | * statemachine and actions which are prefixed ctcmpc_ . |
| 1197 | * The ctc_ch_states and ctc_ch_state_names, |
| 1198 | * ctc_ch_events and ctc_ch_event_names share the ctcm definitions |
| 1199 | * which are expanded by some elements. |
| 1200 | */ |
| 1201 | |
| 1202 | /* |
| 1203 | * Actions for mpc channel statemachine. |
| 1204 | */ |
| 1205 | |
| 1206 | /** |
| 1207 | * Normal data has been send. Free the corresponding |
| 1208 | * skb (it's in io_queue), reset dev->tbusy and |
| 1209 | * revert to idle state. |
| 1210 | * |
| 1211 | * fi An instance of a channel statemachine. |
| 1212 | * event The event, just happened. |
| 1213 | * arg Generic pointer, casted from channel * upon call. |
| 1214 | */ |
| 1215 | static void ctcmpc_chx_txdone(fsm_instance *fi, int event, void *arg) |
| 1216 | { |
| 1217 | struct channel *ch = arg; |
| 1218 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1219 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1220 | struct mpc_group *grp = priv->mpcg; |
| 1221 | struct sk_buff *skb; |
| 1222 | int first = 1; |
| 1223 | int i; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1224 | __u32 data_space; |
| 1225 | unsigned long duration; |
| 1226 | struct sk_buff *peekskb; |
| 1227 | int rc; |
| 1228 | struct th_header *header; |
| 1229 | struct pdu *p_header; |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 1230 | unsigned long done_stamp = jiffies; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1231 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1232 | CTCM_PR_DEBUG("Enter %s: %s cp:%i\n", |
| 1233 | __func__, dev->name, smp_processor_id()); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1234 | |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 1235 | duration = done_stamp - ch->prof.send_stamp; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1236 | if (duration > ch->prof.tx_time) |
| 1237 | ch->prof.tx_time = duration; |
| 1238 | |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 1239 | if (ch->irb->scsw.cmd.count != 0) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1240 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 1241 | "%s(%s): TX not complete, remaining %d bytes", |
| 1242 | CTCM_FUNTAIL, dev->name, ch->irb->scsw.cmd.count); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1243 | fsm_deltimer(&ch->timer); |
| 1244 | while ((skb = skb_dequeue(&ch->io_queue))) { |
| 1245 | priv->stats.tx_packets++; |
| 1246 | priv->stats.tx_bytes += skb->len - TH_HEADER_LENGTH; |
| 1247 | if (first) { |
| 1248 | priv->stats.tx_bytes += 2; |
| 1249 | first = 0; |
| 1250 | } |
| 1251 | atomic_dec(&skb->users); |
| 1252 | dev_kfree_skb_irq(skb); |
| 1253 | } |
| 1254 | spin_lock(&ch->collect_lock); |
| 1255 | clear_normalized_cda(&ch->ccw[4]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1256 | if ((ch->collect_len <= 0) || (grp->in_sweep != 0)) { |
| 1257 | spin_unlock(&ch->collect_lock); |
| 1258 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
| 1259 | goto done; |
| 1260 | } |
| 1261 | |
| 1262 | if (ctcm_checkalloc_buffer(ch)) { |
| 1263 | spin_unlock(&ch->collect_lock); |
| 1264 | goto done; |
| 1265 | } |
| 1266 | ch->trans_skb->data = ch->trans_skb_data; |
| 1267 | skb_reset_tail_pointer(ch->trans_skb); |
| 1268 | ch->trans_skb->len = 0; |
| 1269 | if (ch->prof.maxmulti < (ch->collect_len + TH_HEADER_LENGTH)) |
| 1270 | ch->prof.maxmulti = ch->collect_len + TH_HEADER_LENGTH; |
| 1271 | if (ch->prof.maxcqueue < skb_queue_len(&ch->collect_queue)) |
| 1272 | ch->prof.maxcqueue = skb_queue_len(&ch->collect_queue); |
| 1273 | i = 0; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1274 | p_header = NULL; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1275 | data_space = grp->group_max_buflen - TH_HEADER_LENGTH; |
| 1276 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1277 | CTCM_PR_DBGDATA("%s: building trans_skb from collect_q" |
| 1278 | " data_space:%04x\n", |
| 1279 | __func__, data_space); |
| 1280 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1281 | while ((skb = skb_dequeue(&ch->collect_queue))) { |
| 1282 | memcpy(skb_put(ch->trans_skb, skb->len), skb->data, skb->len); |
| 1283 | p_header = (struct pdu *) |
| 1284 | (skb_tail_pointer(ch->trans_skb) - skb->len); |
| 1285 | p_header->pdu_flag = 0x00; |
| 1286 | if (skb->protocol == ntohs(ETH_P_SNAP)) |
| 1287 | p_header->pdu_flag |= 0x60; |
| 1288 | else |
| 1289 | p_header->pdu_flag |= 0x20; |
| 1290 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1291 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
| 1292 | __func__, ch->trans_skb->len); |
| 1293 | CTCM_PR_DBGDATA("%s: pdu header and data for up" |
| 1294 | " to 32 bytes sent to vtam\n", __func__); |
| 1295 | CTCM_D3_DUMP((char *)p_header, min_t(int, skb->len, 32)); |
| 1296 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1297 | ch->collect_len -= skb->len; |
| 1298 | data_space -= skb->len; |
| 1299 | priv->stats.tx_packets++; |
| 1300 | priv->stats.tx_bytes += skb->len; |
| 1301 | atomic_dec(&skb->users); |
| 1302 | dev_kfree_skb_any(skb); |
| 1303 | peekskb = skb_peek(&ch->collect_queue); |
| 1304 | if (peekskb->len > data_space) |
| 1305 | break; |
| 1306 | i++; |
| 1307 | } |
| 1308 | /* p_header points to the last one we handled */ |
| 1309 | if (p_header) |
| 1310 | p_header->pdu_flag |= PDU_LAST; /*Say it's the last one*/ |
| 1311 | header = kzalloc(TH_HEADER_LENGTH, gfp_type()); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1312 | if (!header) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1313 | spin_unlock(&ch->collect_lock); |
| 1314 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1315 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1316 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1317 | header->th_ch_flag = TH_HAS_PDU; /* Normal data */ |
| 1318 | ch->th_seq_num++; |
| 1319 | header->th_seq_num = ch->th_seq_num; |
| 1320 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1321 | CTCM_PR_DBGDATA("%s: ToVTAM_th_seq= %08x\n" , |
| 1322 | __func__, ch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1323 | |
| 1324 | memcpy(skb_push(ch->trans_skb, TH_HEADER_LENGTH), header, |
| 1325 | TH_HEADER_LENGTH); /* put the TH on the packet */ |
| 1326 | |
| 1327 | kfree(header); |
| 1328 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1329 | CTCM_PR_DBGDATA("%s: trans_skb len:%04x \n", |
| 1330 | __func__, ch->trans_skb->len); |
| 1331 | CTCM_PR_DBGDATA("%s: up-to-50 bytes of trans_skb " |
| 1332 | "data to vtam from collect_q\n", __func__); |
| 1333 | CTCM_D3_DUMP((char *)ch->trans_skb->data, |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1334 | min_t(int, ch->trans_skb->len, 50)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1335 | |
| 1336 | spin_unlock(&ch->collect_lock); |
| 1337 | clear_normalized_cda(&ch->ccw[1]); |
Belinda Thompson | 205a8b6 | 2012-03-07 02:06:27 +0000 | [diff] [blame] | 1338 | |
| 1339 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", |
| 1340 | (void *)(unsigned long)ch->ccw[1].cda, |
| 1341 | ch->trans_skb->data); |
| 1342 | ch->ccw[1].count = ch->max_bufsize; |
| 1343 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1344 | if (set_normalized_cda(&ch->ccw[1], ch->trans_skb->data)) { |
| 1345 | dev_kfree_skb_any(ch->trans_skb); |
| 1346 | ch->trans_skb = NULL; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1347 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ERROR, |
| 1348 | "%s: %s: IDAL alloc failed", |
| 1349 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1350 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
| 1351 | return; |
| 1352 | } |
Belinda Thompson | 205a8b6 | 2012-03-07 02:06:27 +0000 | [diff] [blame] | 1353 | |
| 1354 | CTCM_PR_DBGDATA("ccwcda=0x%p data=0x%p\n", |
| 1355 | (void *)(unsigned long)ch->ccw[1].cda, |
| 1356 | ch->trans_skb->data); |
| 1357 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1358 | ch->ccw[1].count = ch->trans_skb->len; |
| 1359 | fsm_addtimer(&ch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, ch); |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 1360 | ch->prof.send_stamp = jiffies; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1361 | if (do_debug_ccw) |
| 1362 | ctcmpc_dumpit((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
| 1363 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 1364 | (unsigned long)ch, 0xff, 0); |
| 1365 | ch->prof.doios_multi++; |
| 1366 | if (rc != 0) { |
| 1367 | priv->stats.tx_dropped += i; |
| 1368 | priv->stats.tx_errors += i; |
| 1369 | fsm_deltimer(&ch->timer); |
| 1370 | ctcm_ccw_check_rc(ch, rc, "chained TX"); |
| 1371 | } |
| 1372 | done: |
| 1373 | ctcm_clear_busy(dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1374 | return; |
| 1375 | } |
| 1376 | |
| 1377 | /** |
| 1378 | * Got normal data, check for sanity, queue it up, allocate new buffer |
| 1379 | * trigger bottom half, and initiate next read. |
| 1380 | * |
| 1381 | * fi An instance of a channel statemachine. |
| 1382 | * event The event, just happened. |
| 1383 | * arg Generic pointer, casted from channel * upon call. |
| 1384 | */ |
| 1385 | static void ctcmpc_chx_rx(fsm_instance *fi, int event, void *arg) |
| 1386 | { |
| 1387 | struct channel *ch = arg; |
| 1388 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1389 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1390 | struct mpc_group *grp = priv->mpcg; |
| 1391 | struct sk_buff *skb = ch->trans_skb; |
| 1392 | struct sk_buff *new_skb; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1393 | unsigned long saveflags = 0; /* avoids compiler warning */ |
Peter Oberparleiter | 23d805b | 2008-07-14 09:58:50 +0200 | [diff] [blame] | 1394 | int len = ch->max_bufsize - ch->irb->scsw.cmd.count; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1395 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1396 | CTCM_PR_DEBUG("%s: %s: cp:%i %s maxbuf : %04x, len: %04x\n", |
| 1397 | CTCM_FUNTAIL, dev->name, smp_processor_id(), |
| 1398 | ch->id, ch->max_bufsize, len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1399 | fsm_deltimer(&ch->timer); |
| 1400 | |
| 1401 | if (skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1402 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1403 | "%s(%s): TRANS_SKB = NULL", |
| 1404 | CTCM_FUNTAIL, dev->name); |
| 1405 | goto again; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | if (len < TH_HEADER_LENGTH) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1409 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1410 | "%s(%s): packet length %d to short", |
| 1411 | CTCM_FUNTAIL, dev->name, len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1412 | priv->stats.rx_dropped++; |
| 1413 | priv->stats.rx_length_errors++; |
| 1414 | } else { |
| 1415 | /* must have valid th header or game over */ |
| 1416 | __u32 block_len = len; |
| 1417 | len = TH_HEADER_LENGTH + XID2_LENGTH + 4; |
| 1418 | new_skb = __dev_alloc_skb(ch->max_bufsize, GFP_ATOMIC); |
| 1419 | |
| 1420 | if (new_skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1421 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1422 | "%s(%d): skb allocation failed", |
| 1423 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1424 | fsm_event(priv->mpcg->fsm, MPCG_EVENT_INOP, dev); |
| 1425 | goto again; |
| 1426 | } |
| 1427 | switch (fsm_getstate(grp->fsm)) { |
| 1428 | case MPCG_STATE_RESET: |
| 1429 | case MPCG_STATE_INOP: |
| 1430 | dev_kfree_skb_any(new_skb); |
| 1431 | break; |
| 1432 | case MPCG_STATE_FLOWC: |
| 1433 | case MPCG_STATE_READY: |
| 1434 | memcpy(skb_put(new_skb, block_len), |
| 1435 | skb->data, block_len); |
| 1436 | skb_queue_tail(&ch->io_queue, new_skb); |
| 1437 | tasklet_schedule(&ch->ch_tasklet); |
| 1438 | break; |
| 1439 | default: |
| 1440 | memcpy(skb_put(new_skb, len), skb->data, len); |
| 1441 | skb_queue_tail(&ch->io_queue, new_skb); |
| 1442 | tasklet_hi_schedule(&ch->ch_tasklet); |
| 1443 | break; |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | again: |
| 1448 | switch (fsm_getstate(grp->fsm)) { |
| 1449 | int rc, dolock; |
| 1450 | case MPCG_STATE_FLOWC: |
| 1451 | case MPCG_STATE_READY: |
| 1452 | if (ctcm_checkalloc_buffer(ch)) |
| 1453 | break; |
| 1454 | ch->trans_skb->data = ch->trans_skb_data; |
| 1455 | skb_reset_tail_pointer(ch->trans_skb); |
| 1456 | ch->trans_skb->len = 0; |
| 1457 | ch->ccw[1].count = ch->max_bufsize; |
| 1458 | if (do_debug_ccw) |
| 1459 | ctcmpc_dumpit((char *)&ch->ccw[0], |
| 1460 | sizeof(struct ccw1) * 3); |
| 1461 | dolock = !in_irq(); |
| 1462 | if (dolock) |
| 1463 | spin_lock_irqsave( |
| 1464 | get_ccwdev_lock(ch->cdev), saveflags); |
| 1465 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 1466 | (unsigned long)ch, 0xff, 0); |
| 1467 | if (dolock) /* see remark about conditional locking */ |
| 1468 | spin_unlock_irqrestore( |
| 1469 | get_ccwdev_lock(ch->cdev), saveflags); |
| 1470 | if (rc != 0) |
| 1471 | ctcm_ccw_check_rc(ch, rc, "normal RX"); |
| 1472 | default: |
| 1473 | break; |
| 1474 | } |
| 1475 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1476 | CTCM_PR_DEBUG("Exit %s: %s, ch=0x%p, id=%s\n", |
| 1477 | __func__, dev->name, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1478 | |
| 1479 | } |
| 1480 | |
| 1481 | /** |
| 1482 | * Initialize connection by sending a __u16 of value 0. |
| 1483 | * |
| 1484 | * fi An instance of a channel statemachine. |
| 1485 | * event The event, just happened. |
| 1486 | * arg Generic pointer, casted from channel * upon call. |
| 1487 | */ |
| 1488 | static void ctcmpc_chx_firstio(fsm_instance *fi, int event, void *arg) |
| 1489 | { |
| 1490 | struct channel *ch = arg; |
| 1491 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1492 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1493 | struct mpc_group *gptr = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1494 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1495 | CTCM_PR_DEBUG("Enter %s: id=%s, ch=0x%p\n", |
| 1496 | __func__, ch->id, ch); |
| 1497 | |
| 1498 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, |
| 1499 | "%s: %s: chstate:%i, grpstate:%i, prot:%i\n", |
| 1500 | CTCM_FUNTAIL, ch->id, fsm_getstate(fi), |
| 1501 | fsm_getstate(gptr->fsm), ch->protocol); |
| 1502 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1503 | if (fsm_getstate(fi) == CTC_STATE_TXIDLE) |
| 1504 | MPC_DBF_DEV_NAME(TRACE, dev, "remote side issued READ? "); |
| 1505 | |
| 1506 | fsm_deltimer(&ch->timer); |
| 1507 | if (ctcm_checkalloc_buffer(ch)) |
| 1508 | goto done; |
| 1509 | |
| 1510 | switch (fsm_getstate(fi)) { |
| 1511 | case CTC_STATE_STARTRETRY: |
| 1512 | case CTC_STATE_SETUPWAIT: |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 1513 | if (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1514 | ctcmpc_chx_rxidle(fi, event, arg); |
| 1515 | } else { |
| 1516 | fsm_newstate(fi, CTC_STATE_TXIDLE); |
| 1517 | fsm_event(priv->fsm, DEV_EVENT_TXUP, dev); |
| 1518 | } |
| 1519 | goto done; |
| 1520 | default: |
| 1521 | break; |
Peter Senna Tschudin | 6531084 | 2012-09-24 04:24:26 +0000 | [diff] [blame] | 1522 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1523 | |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 1524 | fsm_newstate(fi, (CHANNEL_DIRECTION(ch->flags) == CTCM_READ) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1525 | ? CTC_STATE_RXINIT : CTC_STATE_TXINIT); |
| 1526 | |
| 1527 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1528 | CTCM_PR_DEBUG("Exit %s: id=%s, ch=0x%p\n", |
| 1529 | __func__, ch->id, ch); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1530 | return; |
| 1531 | } |
| 1532 | |
| 1533 | /** |
| 1534 | * Got initial data, check it. If OK, |
| 1535 | * notify device statemachine that we are up and |
| 1536 | * running. |
| 1537 | * |
| 1538 | * fi An instance of a channel statemachine. |
| 1539 | * event The event, just happened. |
| 1540 | * arg Generic pointer, casted from channel * upon call. |
| 1541 | */ |
| 1542 | void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg) |
| 1543 | { |
| 1544 | struct channel *ch = arg; |
| 1545 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1546 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1547 | struct mpc_group *grp = priv->mpcg; |
| 1548 | int rc; |
| 1549 | unsigned long saveflags = 0; /* avoids compiler warning */ |
| 1550 | |
| 1551 | fsm_deltimer(&ch->timer); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1552 | CTCM_PR_DEBUG("%s: %s: %s: cp:%i, chstate:%i grpstate:%i\n", |
| 1553 | __func__, ch->id, dev->name, smp_processor_id(), |
| 1554 | fsm_getstate(fi), fsm_getstate(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1555 | |
| 1556 | fsm_newstate(fi, CTC_STATE_RXIDLE); |
| 1557 | /* XID processing complete */ |
| 1558 | |
| 1559 | switch (fsm_getstate(grp->fsm)) { |
| 1560 | case MPCG_STATE_FLOWC: |
| 1561 | case MPCG_STATE_READY: |
| 1562 | if (ctcm_checkalloc_buffer(ch)) |
| 1563 | goto done; |
| 1564 | ch->trans_skb->data = ch->trans_skb_data; |
| 1565 | skb_reset_tail_pointer(ch->trans_skb); |
| 1566 | ch->trans_skb->len = 0; |
| 1567 | ch->ccw[1].count = ch->max_bufsize; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1568 | CTCM_CCW_DUMP((char *)&ch->ccw[0], sizeof(struct ccw1) * 3); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1569 | if (event == CTC_EVENT_START) |
| 1570 | /* see remark about conditional locking */ |
| 1571 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1572 | rc = ccw_device_start(ch->cdev, &ch->ccw[0], |
| 1573 | (unsigned long)ch, 0xff, 0); |
| 1574 | if (event == CTC_EVENT_START) |
| 1575 | spin_unlock_irqrestore( |
| 1576 | get_ccwdev_lock(ch->cdev), saveflags); |
| 1577 | if (rc != 0) { |
| 1578 | fsm_newstate(fi, CTC_STATE_RXINIT); |
| 1579 | ctcm_ccw_check_rc(ch, rc, "initial RX"); |
| 1580 | goto done; |
| 1581 | } |
| 1582 | break; |
| 1583 | default: |
| 1584 | break; |
| 1585 | } |
| 1586 | |
| 1587 | fsm_event(priv->fsm, DEV_EVENT_RXUP, dev); |
| 1588 | done: |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1589 | return; |
| 1590 | } |
| 1591 | |
| 1592 | /* |
| 1593 | * ctcmpc channel FSM action |
| 1594 | * called from several points in ctcmpc_ch_fsm |
| 1595 | * ctcmpc only |
| 1596 | */ |
| 1597 | static void ctcmpc_chx_attn(fsm_instance *fsm, int event, void *arg) |
| 1598 | { |
| 1599 | struct channel *ch = arg; |
| 1600 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1601 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1602 | struct mpc_group *grp = priv->mpcg; |
| 1603 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1604 | CTCM_PR_DEBUG("%s(%s): %s(ch=0x%p), cp=%i, ChStat:%s, GrpStat:%s\n", |
| 1605 | __func__, dev->name, ch->id, ch, smp_processor_id(), |
| 1606 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1607 | |
| 1608 | switch (fsm_getstate(grp->fsm)) { |
| 1609 | case MPCG_STATE_XID2INITW: |
| 1610 | /* ok..start yside xid exchanges */ |
| 1611 | if (!ch->in_mpcgroup) |
| 1612 | break; |
| 1613 | if (fsm_getstate(ch->fsm) == CH_XID0_PENDING) { |
| 1614 | fsm_deltimer(&grp->timer); |
| 1615 | fsm_addtimer(&grp->timer, |
| 1616 | MPC_XID_TIMEOUT_VALUE, |
| 1617 | MPCG_EVENT_TIMER, dev); |
| 1618 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
| 1619 | |
| 1620 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) |
| 1621 | /* attn rcvd before xid0 processed via bh */ |
| 1622 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); |
| 1623 | break; |
| 1624 | case MPCG_STATE_XID2INITX: |
| 1625 | case MPCG_STATE_XID0IOWAIT: |
| 1626 | case MPCG_STATE_XID0IOWAIX: |
| 1627 | /* attn rcvd before xid0 processed on ch |
| 1628 | but mid-xid0 processing for group */ |
| 1629 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING1) |
| 1630 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); |
| 1631 | break; |
| 1632 | case MPCG_STATE_XID7INITW: |
| 1633 | case MPCG_STATE_XID7INITX: |
| 1634 | case MPCG_STATE_XID7INITI: |
| 1635 | case MPCG_STATE_XID7INITZ: |
| 1636 | switch (fsm_getstate(ch->fsm)) { |
| 1637 | case CH_XID7_PENDING: |
| 1638 | fsm_newstate(ch->fsm, CH_XID7_PENDING1); |
| 1639 | break; |
| 1640 | case CH_XID7_PENDING2: |
| 1641 | fsm_newstate(ch->fsm, CH_XID7_PENDING3); |
| 1642 | break; |
| 1643 | } |
| 1644 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); |
| 1645 | break; |
| 1646 | } |
| 1647 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1648 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1649 | } |
| 1650 | |
| 1651 | /* |
| 1652 | * ctcmpc channel FSM action |
| 1653 | * called from one point in ctcmpc_ch_fsm |
| 1654 | * ctcmpc only |
| 1655 | */ |
| 1656 | static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg) |
| 1657 | { |
| 1658 | struct channel *ch = arg; |
| 1659 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1660 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1661 | struct mpc_group *grp = priv->mpcg; |
| 1662 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1663 | CTCM_PR_DEBUG("%s(%s): %s\n ChState:%s GrpState:%s\n", |
| 1664 | __func__, dev->name, ch->id, |
| 1665 | fsm_getstate_str(ch->fsm), fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1666 | |
| 1667 | fsm_deltimer(&ch->timer); |
| 1668 | |
| 1669 | switch (fsm_getstate(grp->fsm)) { |
| 1670 | case MPCG_STATE_XID0IOWAIT: |
| 1671 | /* vtam wants to be primary.start yside xid exchanges*/ |
| 1672 | /* only receive one attn-busy at a time so must not */ |
| 1673 | /* change state each time */ |
| 1674 | grp->changed_side = 1; |
| 1675 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); |
| 1676 | break; |
| 1677 | case MPCG_STATE_XID2INITW: |
| 1678 | if (grp->changed_side == 1) { |
| 1679 | grp->changed_side = 2; |
| 1680 | break; |
| 1681 | } |
| 1682 | /* process began via call to establish_conn */ |
| 1683 | /* so must report failure instead of reverting */ |
| 1684 | /* back to ready-for-xid passive state */ |
| 1685 | if (grp->estconnfunc) |
| 1686 | goto done; |
| 1687 | /* this attnbusy is NOT the result of xside xid */ |
| 1688 | /* collisions so yside must have been triggered */ |
| 1689 | /* by an ATTN that was not intended to start XID */ |
| 1690 | /* processing. Revert back to ready-for-xid and */ |
| 1691 | /* wait for ATTN interrupt to signal xid start */ |
| 1692 | if (fsm_getstate(ch->fsm) == CH_XID0_INPROGRESS) { |
| 1693 | fsm_newstate(ch->fsm, CH_XID0_PENDING) ; |
| 1694 | fsm_deltimer(&grp->timer); |
| 1695 | goto done; |
| 1696 | } |
| 1697 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1698 | goto done; |
| 1699 | case MPCG_STATE_XID2INITX: |
| 1700 | /* XID2 was received before ATTN Busy for second |
| 1701 | channel.Send yside xid for second channel. |
| 1702 | */ |
| 1703 | if (grp->changed_side == 1) { |
| 1704 | grp->changed_side = 2; |
| 1705 | break; |
| 1706 | } |
| 1707 | case MPCG_STATE_XID0IOWAIX: |
| 1708 | case MPCG_STATE_XID7INITW: |
| 1709 | case MPCG_STATE_XID7INITX: |
| 1710 | case MPCG_STATE_XID7INITI: |
| 1711 | case MPCG_STATE_XID7INITZ: |
| 1712 | default: |
| 1713 | /* multiple attn-busy indicates too out-of-sync */ |
| 1714 | /* and they are certainly not being received as part */ |
| 1715 | /* of valid mpc group negotiations.. */ |
| 1716 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1717 | goto done; |
| 1718 | } |
| 1719 | |
| 1720 | if (grp->changed_side == 1) { |
| 1721 | fsm_deltimer(&grp->timer); |
| 1722 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, |
| 1723 | MPCG_EVENT_TIMER, dev); |
| 1724 | } |
| 1725 | if (ch->in_mpcgroup) |
| 1726 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
| 1727 | else |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1728 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1729 | "%s(%s): channel %s not added to group", |
| 1730 | CTCM_FUNTAIL, dev->name, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1731 | |
| 1732 | done: |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1733 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1734 | } |
| 1735 | |
| 1736 | /* |
| 1737 | * ctcmpc channel FSM action |
| 1738 | * called from several points in ctcmpc_ch_fsm |
| 1739 | * ctcmpc only |
| 1740 | */ |
| 1741 | static void ctcmpc_chx_resend(fsm_instance *fsm, int event, void *arg) |
| 1742 | { |
| 1743 | struct channel *ch = arg; |
| 1744 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1745 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1746 | struct mpc_group *grp = priv->mpcg; |
| 1747 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1748 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, ch); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1749 | return; |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * ctcmpc channel FSM action |
| 1754 | * called from several points in ctcmpc_ch_fsm |
| 1755 | * ctcmpc only |
| 1756 | */ |
| 1757 | static void ctcmpc_chx_send_sweep(fsm_instance *fsm, int event, void *arg) |
| 1758 | { |
| 1759 | struct channel *ach = arg; |
| 1760 | struct net_device *dev = ach->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1761 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1762 | struct mpc_group *grp = priv->mpcg; |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 1763 | struct channel *wch = priv->channel[CTCM_WRITE]; |
| 1764 | struct channel *rch = priv->channel[CTCM_READ]; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1765 | struct sk_buff *skb; |
| 1766 | struct th_sweep *header; |
| 1767 | int rc = 0; |
| 1768 | unsigned long saveflags = 0; |
| 1769 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1770 | CTCM_PR_DEBUG("ctcmpc enter: %s(): cp=%i ch=0x%p id=%s\n", |
| 1771 | __func__, smp_processor_id(), ach, ach->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1772 | |
| 1773 | if (grp->in_sweep == 0) |
| 1774 | goto done; |
| 1775 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1776 | CTCM_PR_DBGDATA("%s: 1: ToVTAM_th_seq= %08x\n" , |
| 1777 | __func__, wch->th_seq_num); |
| 1778 | CTCM_PR_DBGDATA("%s: 1: FromVTAM_th_seq= %08x\n" , |
| 1779 | __func__, rch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1780 | |
| 1781 | if (fsm_getstate(wch->fsm) != CTC_STATE_TXIDLE) { |
| 1782 | /* give the previous IO time to complete */ |
| 1783 | fsm_addtimer(&wch->sweep_timer, |
| 1784 | 200, CTC_EVENT_RSWEEP_TIMER, wch); |
| 1785 | goto done; |
| 1786 | } |
| 1787 | |
| 1788 | skb = skb_dequeue(&wch->sweep_queue); |
| 1789 | if (!skb) |
| 1790 | goto done; |
| 1791 | |
| 1792 | if (set_normalized_cda(&wch->ccw[4], skb->data)) { |
| 1793 | grp->in_sweep = 0; |
| 1794 | ctcm_clear_busy_do(dev); |
| 1795 | dev_kfree_skb_any(skb); |
| 1796 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1797 | goto done; |
| 1798 | } else { |
| 1799 | atomic_inc(&skb->users); |
| 1800 | skb_queue_tail(&wch->io_queue, skb); |
| 1801 | } |
| 1802 | |
| 1803 | /* send out the sweep */ |
| 1804 | wch->ccw[4].count = skb->len; |
| 1805 | |
| 1806 | header = (struct th_sweep *)skb->data; |
| 1807 | switch (header->th.th_ch_flag) { |
| 1808 | case TH_SWEEP_REQ: |
| 1809 | grp->sweep_req_pend_num--; |
| 1810 | break; |
| 1811 | case TH_SWEEP_RESP: |
| 1812 | grp->sweep_rsp_pend_num--; |
| 1813 | break; |
| 1814 | } |
| 1815 | |
| 1816 | header->sw.th_last_seq = wch->th_seq_num; |
| 1817 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1818 | CTCM_CCW_DUMP((char *)&wch->ccw[3], sizeof(struct ccw1) * 3); |
| 1819 | CTCM_PR_DBGDATA("%s: sweep packet\n", __func__); |
| 1820 | CTCM_D3_DUMP((char *)header, TH_SWEEP_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1821 | |
| 1822 | fsm_addtimer(&wch->timer, CTCM_TIME_5_SEC, CTC_EVENT_TIMER, wch); |
| 1823 | fsm_newstate(wch->fsm, CTC_STATE_TX); |
| 1824 | |
| 1825 | spin_lock_irqsave(get_ccwdev_lock(wch->cdev), saveflags); |
Aya Mahfouz | ee6edb9 | 2015-01-16 14:05:45 +0100 | [diff] [blame] | 1826 | wch->prof.send_stamp = jiffies; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1827 | rc = ccw_device_start(wch->cdev, &wch->ccw[3], |
| 1828 | (unsigned long) wch, 0xff, 0); |
| 1829 | spin_unlock_irqrestore(get_ccwdev_lock(wch->cdev), saveflags); |
| 1830 | |
| 1831 | if ((grp->sweep_req_pend_num == 0) && |
| 1832 | (grp->sweep_rsp_pend_num == 0)) { |
| 1833 | grp->in_sweep = 0; |
| 1834 | rch->th_seq_num = 0x00; |
| 1835 | wch->th_seq_num = 0x00; |
| 1836 | ctcm_clear_busy_do(dev); |
| 1837 | } |
| 1838 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1839 | CTCM_PR_DBGDATA("%s: To-/From-VTAM_th_seq = %08x/%08x\n" , |
| 1840 | __func__, wch->th_seq_num, rch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1841 | |
| 1842 | if (rc != 0) |
| 1843 | ctcm_ccw_check_rc(wch, rc, "send sweep"); |
| 1844 | |
| 1845 | done: |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1846 | return; |
| 1847 | } |
| 1848 | |
| 1849 | |
| 1850 | /* |
| 1851 | * The ctcmpc statemachine for a channel. |
| 1852 | */ |
| 1853 | |
| 1854 | const fsm_node ctcmpc_ch_fsm[] = { |
| 1855 | { CTC_STATE_STOPPED, CTC_EVENT_STOP, ctcm_action_nop }, |
| 1856 | { CTC_STATE_STOPPED, CTC_EVENT_START, ctcm_chx_start }, |
| 1857 | { CTC_STATE_STOPPED, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1858 | { CTC_STATE_STOPPED, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1859 | { CTC_STATE_STOPPED, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
| 1860 | |
| 1861 | { CTC_STATE_NOTOP, CTC_EVENT_STOP, ctcm_chx_stop }, |
| 1862 | { CTC_STATE_NOTOP, CTC_EVENT_START, ctcm_action_nop }, |
| 1863 | { CTC_STATE_NOTOP, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1864 | { CTC_STATE_NOTOP, CTC_EVENT_MC_FAIL, ctcm_action_nop }, |
| 1865 | { CTC_STATE_NOTOP, CTC_EVENT_MC_GOOD, ctcm_chx_start }, |
| 1866 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RCRESET, ctcm_chx_stop }, |
| 1867 | { CTC_STATE_NOTOP, CTC_EVENT_UC_RSRESET, ctcm_chx_stop }, |
| 1868 | { CTC_STATE_NOTOP, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1869 | |
| 1870 | { CTC_STATE_STARTWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1871 | { CTC_STATE_STARTWAIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1872 | { CTC_STATE_STARTWAIT, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
| 1873 | { CTC_STATE_STARTWAIT, CTC_EVENT_TIMER, ctcm_chx_setuperr }, |
| 1874 | { CTC_STATE_STARTWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1875 | { CTC_STATE_STARTWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1876 | |
| 1877 | { CTC_STATE_STARTRETRY, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1878 | { CTC_STATE_STARTRETRY, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
| 1879 | { CTC_STATE_STARTRETRY, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
| 1880 | { CTC_STATE_STARTRETRY, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1881 | { CTC_STATE_STARTRETRY, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1882 | |
| 1883 | { CTC_STATE_SETUPWAIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1884 | { CTC_STATE_SETUPWAIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1885 | { CTC_STATE_SETUPWAIT, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, |
| 1886 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1887 | { CTC_STATE_SETUPWAIT, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1888 | { CTC_STATE_SETUPWAIT, CTC_EVENT_TIMER, ctcm_chx_setmode }, |
| 1889 | { CTC_STATE_SETUPWAIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1890 | { CTC_STATE_SETUPWAIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1891 | |
| 1892 | { CTC_STATE_RXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1893 | { CTC_STATE_RXINIT, CTC_EVENT_START, ctcm_action_nop }, |
| 1894 | { CTC_STATE_RXINIT, CTC_EVENT_FINSTAT, ctcmpc_chx_rxidle }, |
| 1895 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_rxiniterr }, |
| 1896 | { CTC_STATE_RXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_rxiniterr }, |
| 1897 | { CTC_STATE_RXINIT, CTC_EVENT_TIMER, ctcm_chx_rxiniterr }, |
| 1898 | { CTC_STATE_RXINIT, CTC_EVENT_ATTNBUSY, ctcm_chx_rxinitfail }, |
| 1899 | { CTC_STATE_RXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1900 | { CTC_STATE_RXINIT, CTC_EVENT_UC_ZERO, ctcmpc_chx_firstio }, |
| 1901 | { CTC_STATE_RXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1902 | |
| 1903 | { CH_XID0_PENDING, CTC_EVENT_FINSTAT, ctcm_action_nop }, |
| 1904 | { CH_XID0_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1905 | { CH_XID0_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1906 | { CH_XID0_PENDING, CTC_EVENT_START, ctcm_action_nop }, |
| 1907 | { CH_XID0_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1908 | { CH_XID0_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1909 | { CH_XID0_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1910 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1911 | { CH_XID0_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1912 | { CH_XID0_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1913 | |
| 1914 | { CH_XID0_INPROGRESS, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1915 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1916 | { CH_XID0_INPROGRESS, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1917 | { CH_XID0_INPROGRESS, CTC_EVENT_START, ctcm_action_nop }, |
| 1918 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1919 | { CH_XID0_INPROGRESS, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1920 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1921 | { CH_XID0_INPROGRESS, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1922 | { CH_XID0_INPROGRESS, CTC_EVENT_ATTNBUSY, ctcmpc_chx_attnbusy }, |
| 1923 | { CH_XID0_INPROGRESS, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1924 | { CH_XID0_INPROGRESS, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1925 | |
| 1926 | { CH_XID7_PENDING, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1927 | { CH_XID7_PENDING, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1928 | { CH_XID7_PENDING, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1929 | { CH_XID7_PENDING, CTC_EVENT_START, ctcm_action_nop }, |
| 1930 | { CH_XID7_PENDING, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1931 | { CH_XID7_PENDING, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1932 | { CH_XID7_PENDING, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1933 | { CH_XID7_PENDING, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1934 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1935 | { CH_XID7_PENDING, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1936 | { CH_XID7_PENDING, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1937 | { CH_XID7_PENDING, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1938 | { CH_XID7_PENDING, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1939 | |
| 1940 | { CH_XID7_PENDING1, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1941 | { CH_XID7_PENDING1, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1942 | { CH_XID7_PENDING1, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1943 | { CH_XID7_PENDING1, CTC_EVENT_START, ctcm_action_nop }, |
| 1944 | { CH_XID7_PENDING1, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1945 | { CH_XID7_PENDING1, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1946 | { CH_XID7_PENDING1, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1947 | { CH_XID7_PENDING1, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1948 | { CH_XID7_PENDING1, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1949 | { CH_XID7_PENDING1, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1950 | { CH_XID7_PENDING1, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1951 | { CH_XID7_PENDING1, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1952 | |
| 1953 | { CH_XID7_PENDING2, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1954 | { CH_XID7_PENDING2, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1955 | { CH_XID7_PENDING2, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1956 | { CH_XID7_PENDING2, CTC_EVENT_START, ctcm_action_nop }, |
| 1957 | { CH_XID7_PENDING2, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1958 | { CH_XID7_PENDING2, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1959 | { CH_XID7_PENDING2, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1960 | { CH_XID7_PENDING2, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1961 | { CH_XID7_PENDING2, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1962 | { CH_XID7_PENDING2, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1963 | { CH_XID7_PENDING2, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1964 | { CH_XID7_PENDING2, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1965 | |
| 1966 | { CH_XID7_PENDING3, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1967 | { CH_XID7_PENDING3, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1968 | { CH_XID7_PENDING3, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1969 | { CH_XID7_PENDING3, CTC_EVENT_START, ctcm_action_nop }, |
| 1970 | { CH_XID7_PENDING3, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1971 | { CH_XID7_PENDING3, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1972 | { CH_XID7_PENDING3, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1973 | { CH_XID7_PENDING3, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1974 | { CH_XID7_PENDING3, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1975 | { CH_XID7_PENDING3, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1976 | { CH_XID7_PENDING3, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1977 | { CH_XID7_PENDING3, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1978 | |
| 1979 | { CH_XID7_PENDING4, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1980 | { CH_XID7_PENDING4, CTC_EVENT_ATTN, ctcmpc_chx_attn }, |
| 1981 | { CH_XID7_PENDING4, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1982 | { CH_XID7_PENDING4, CTC_EVENT_START, ctcm_action_nop }, |
| 1983 | { CH_XID7_PENDING4, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1984 | { CH_XID7_PENDING4, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1985 | { CH_XID7_PENDING4, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 1986 | { CH_XID7_PENDING4, CTC_EVENT_UC_RCRESET, ctcm_chx_setuperr }, |
| 1987 | { CH_XID7_PENDING4, CTC_EVENT_UC_RSRESET, ctcm_chx_setuperr }, |
| 1988 | { CH_XID7_PENDING4, CTC_EVENT_ATTNBUSY, ctcm_chx_iofatal }, |
| 1989 | { CH_XID7_PENDING4, CTC_EVENT_TIMER, ctcmpc_chx_resend }, |
| 1990 | { CH_XID7_PENDING4, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 1991 | |
| 1992 | { CTC_STATE_RXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 1993 | { CTC_STATE_RXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
| 1994 | { CTC_STATE_RXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_rx }, |
| 1995 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_rxdisc }, |
| 1996 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
| 1997 | { CTC_STATE_RXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 1998 | { CTC_STATE_RXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 1999 | { CTC_STATE_RXIDLE, CTC_EVENT_UC_ZERO, ctcmpc_chx_rx }, |
| 2000 | |
| 2001 | { CTC_STATE_TXINIT, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2002 | { CTC_STATE_TXINIT, CTC_EVENT_START, ctcm_action_nop }, |
| 2003 | { CTC_STATE_TXINIT, CTC_EVENT_FINSTAT, ctcm_chx_txidle }, |
| 2004 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RCRESET, ctcm_chx_txiniterr }, |
| 2005 | { CTC_STATE_TXINIT, CTC_EVENT_UC_RSRESET, ctcm_chx_txiniterr }, |
| 2006 | { CTC_STATE_TXINIT, CTC_EVENT_TIMER, ctcm_chx_txiniterr }, |
| 2007 | { CTC_STATE_TXINIT, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2008 | { CTC_STATE_TXINIT, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2009 | { CTC_STATE_TXINIT, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
| 2010 | |
| 2011 | { CTC_STATE_TXIDLE, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2012 | { CTC_STATE_TXIDLE, CTC_EVENT_START, ctcm_action_nop }, |
| 2013 | { CTC_STATE_TXIDLE, CTC_EVENT_FINSTAT, ctcmpc_chx_firstio }, |
| 2014 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, |
| 2015 | { CTC_STATE_TXIDLE, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
| 2016 | { CTC_STATE_TXIDLE, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2017 | { CTC_STATE_TXIDLE, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2018 | { CTC_STATE_TXIDLE, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
| 2019 | |
| 2020 | { CTC_STATE_TERM, CTC_EVENT_STOP, ctcm_action_nop }, |
| 2021 | { CTC_STATE_TERM, CTC_EVENT_START, ctcm_chx_restart }, |
| 2022 | { CTC_STATE_TERM, CTC_EVENT_FINSTAT, ctcm_chx_stopped }, |
| 2023 | { CTC_STATE_TERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
| 2024 | { CTC_STATE_TERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
| 2025 | { CTC_STATE_TERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2026 | { CTC_STATE_TERM, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 2027 | { CTC_STATE_TERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2028 | |
| 2029 | { CTC_STATE_DTERM, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2030 | { CTC_STATE_DTERM, CTC_EVENT_START, ctcm_chx_restart }, |
| 2031 | { CTC_STATE_DTERM, CTC_EVENT_FINSTAT, ctcm_chx_setmode }, |
| 2032 | { CTC_STATE_DTERM, CTC_EVENT_UC_RCRESET, ctcm_action_nop }, |
| 2033 | { CTC_STATE_DTERM, CTC_EVENT_UC_RSRESET, ctcm_action_nop }, |
| 2034 | { CTC_STATE_DTERM, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2035 | { CTC_STATE_DTERM, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2036 | |
| 2037 | { CTC_STATE_TX, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2038 | { CTC_STATE_TX, CTC_EVENT_START, ctcm_action_nop }, |
| 2039 | { CTC_STATE_TX, CTC_EVENT_FINSTAT, ctcmpc_chx_txdone }, |
| 2040 | { CTC_STATE_TX, CTC_EVENT_UC_RCRESET, ctcm_chx_fail }, |
| 2041 | { CTC_STATE_TX, CTC_EVENT_UC_RSRESET, ctcm_chx_fail }, |
| 2042 | { CTC_STATE_TX, CTC_EVENT_TIMER, ctcm_chx_txretry }, |
| 2043 | { CTC_STATE_TX, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2044 | { CTC_STATE_TX, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2045 | { CTC_STATE_TX, CTC_EVENT_RSWEEP_TIMER, ctcmpc_chx_send_sweep }, |
| 2046 | { CTC_STATE_TX, CTC_EVENT_IO_EBUSY, ctcm_chx_fail }, |
| 2047 | |
| 2048 | { CTC_STATE_RXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2049 | { CTC_STATE_TXERR, CTC_EVENT_STOP, ctcm_chx_haltio }, |
| 2050 | { CTC_STATE_TXERR, CTC_EVENT_IO_ENODEV, ctcm_chx_iofatal }, |
| 2051 | { CTC_STATE_TXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2052 | { CTC_STATE_RXERR, CTC_EVENT_MC_FAIL, ctcm_chx_fail }, |
| 2053 | }; |
| 2054 | |
| 2055 | int mpc_ch_fsm_len = ARRAY_SIZE(ctcmpc_ch_fsm); |
| 2056 | |
| 2057 | /* |
| 2058 | * Actions for interface - statemachine. |
| 2059 | */ |
| 2060 | |
| 2061 | /** |
| 2062 | * Startup channels by sending CTC_EVENT_START to each channel. |
| 2063 | * |
| 2064 | * fi An instance of an interface statemachine. |
| 2065 | * event The event, just happened. |
| 2066 | * arg Generic pointer, casted from struct net_device * upon call. |
| 2067 | */ |
| 2068 | static void dev_action_start(fsm_instance *fi, int event, void *arg) |
| 2069 | { |
| 2070 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2071 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2072 | int direction; |
| 2073 | |
| 2074 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); |
| 2075 | |
| 2076 | fsm_deltimer(&priv->restart_timer); |
| 2077 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); |
| 2078 | if (IS_MPC(priv)) |
| 2079 | priv->mpcg->channels_terminating = 0; |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2080 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2081 | struct channel *ch = priv->channel[direction]; |
| 2082 | fsm_event(ch->fsm, CTC_EVENT_START, ch); |
| 2083 | } |
| 2084 | } |
| 2085 | |
| 2086 | /** |
| 2087 | * Shutdown channels by sending CTC_EVENT_STOP to each channel. |
| 2088 | * |
| 2089 | * fi An instance of an interface statemachine. |
| 2090 | * event The event, just happened. |
| 2091 | * arg Generic pointer, casted from struct net_device * upon call. |
| 2092 | */ |
| 2093 | static void dev_action_stop(fsm_instance *fi, int event, void *arg) |
| 2094 | { |
| 2095 | int direction; |
| 2096 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2097 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2098 | |
| 2099 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); |
| 2100 | |
| 2101 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2102 | for (direction = CTCM_READ; direction <= CTCM_WRITE; direction++) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2103 | struct channel *ch = priv->channel[direction]; |
| 2104 | fsm_event(ch->fsm, CTC_EVENT_STOP, ch); |
| 2105 | ch->th_seq_num = 0x00; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2106 | CTCM_PR_DEBUG("%s: CH_th_seq= %08x\n", |
| 2107 | __func__, ch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2108 | } |
| 2109 | if (IS_MPC(priv)) |
| 2110 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); |
| 2111 | } |
| 2112 | |
| 2113 | static void dev_action_restart(fsm_instance *fi, int event, void *arg) |
| 2114 | { |
| 2115 | int restart_timer; |
| 2116 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2117 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2118 | |
| 2119 | CTCMY_DBF_DEV_NAME(TRACE, dev, ""); |
| 2120 | |
| 2121 | if (IS_MPC(priv)) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2122 | restart_timer = CTCM_TIME_1_SEC; |
| 2123 | } else { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2124 | restart_timer = CTCM_TIME_5_SEC; |
| 2125 | } |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 2126 | dev_info(&dev->dev, "Restarting device\n"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2127 | |
| 2128 | dev_action_stop(fi, event, arg); |
| 2129 | fsm_event(priv->fsm, DEV_EVENT_STOP, dev); |
| 2130 | if (IS_MPC(priv)) |
| 2131 | fsm_newstate(priv->mpcg->fsm, MPCG_STATE_RESET); |
| 2132 | |
| 2133 | /* going back into start sequence too quickly can */ |
| 2134 | /* result in the other side becoming unreachable due */ |
| 2135 | /* to sense reported when IO is aborted */ |
| 2136 | fsm_addtimer(&priv->restart_timer, restart_timer, |
| 2137 | DEV_EVENT_START, dev); |
| 2138 | } |
| 2139 | |
| 2140 | /** |
| 2141 | * Called from channel statemachine |
| 2142 | * when a channel is up and running. |
| 2143 | * |
| 2144 | * fi An instance of an interface statemachine. |
| 2145 | * event The event, just happened. |
| 2146 | * arg Generic pointer, casted from struct net_device * upon call. |
| 2147 | */ |
| 2148 | static void dev_action_chup(fsm_instance *fi, int event, void *arg) |
| 2149 | { |
| 2150 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2151 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2152 | int dev_stat = fsm_getstate(fi); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2153 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2154 | CTCM_DBF_TEXT_(SETUP, CTC_DBF_NOTICE, |
| 2155 | "%s(%s): priv = %p [%d,%d]\n ", CTCM_FUNTAIL, |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2156 | dev->name, dev->ml_priv, dev_stat, event); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2157 | |
| 2158 | switch (fsm_getstate(fi)) { |
| 2159 | case DEV_STATE_STARTWAIT_RXTX: |
| 2160 | if (event == DEV_EVENT_RXUP) |
| 2161 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); |
| 2162 | else |
| 2163 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); |
| 2164 | break; |
| 2165 | case DEV_STATE_STARTWAIT_RX: |
| 2166 | if (event == DEV_EVENT_RXUP) { |
| 2167 | fsm_newstate(fi, DEV_STATE_RUNNING); |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 2168 | dev_info(&dev->dev, |
| 2169 | "Connected with remote side\n"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2170 | ctcm_clear_busy(dev); |
| 2171 | } |
| 2172 | break; |
| 2173 | case DEV_STATE_STARTWAIT_TX: |
| 2174 | if (event == DEV_EVENT_TXUP) { |
| 2175 | fsm_newstate(fi, DEV_STATE_RUNNING); |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame] | 2176 | dev_info(&dev->dev, |
| 2177 | "Connected with remote side\n"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2178 | ctcm_clear_busy(dev); |
| 2179 | } |
| 2180 | break; |
| 2181 | case DEV_STATE_STOPWAIT_TX: |
| 2182 | if (event == DEV_EVENT_RXUP) |
| 2183 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); |
| 2184 | break; |
| 2185 | case DEV_STATE_STOPWAIT_RX: |
| 2186 | if (event == DEV_EVENT_TXUP) |
| 2187 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RXTX); |
| 2188 | break; |
| 2189 | } |
| 2190 | |
| 2191 | if (IS_MPC(priv)) { |
| 2192 | if (event == DEV_EVENT_RXUP) |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2193 | mpc_channel_action(priv->channel[CTCM_READ], |
| 2194 | CTCM_READ, MPC_CHANNEL_ADD); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2195 | else |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2196 | mpc_channel_action(priv->channel[CTCM_WRITE], |
| 2197 | CTCM_WRITE, MPC_CHANNEL_ADD); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2198 | } |
| 2199 | } |
| 2200 | |
| 2201 | /** |
| 2202 | * Called from device statemachine |
| 2203 | * when a channel has been shutdown. |
| 2204 | * |
| 2205 | * fi An instance of an interface statemachine. |
| 2206 | * event The event, just happened. |
| 2207 | * arg Generic pointer, casted from struct net_device * upon call. |
| 2208 | */ |
| 2209 | static void dev_action_chdown(fsm_instance *fi, int event, void *arg) |
| 2210 | { |
| 2211 | |
| 2212 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2213 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2214 | |
| 2215 | CTCMY_DBF_DEV_NAME(SETUP, dev, ""); |
| 2216 | |
| 2217 | switch (fsm_getstate(fi)) { |
| 2218 | case DEV_STATE_RUNNING: |
| 2219 | if (event == DEV_EVENT_TXDOWN) |
| 2220 | fsm_newstate(fi, DEV_STATE_STARTWAIT_TX); |
| 2221 | else |
| 2222 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RX); |
| 2223 | break; |
| 2224 | case DEV_STATE_STARTWAIT_RX: |
| 2225 | if (event == DEV_EVENT_TXDOWN) |
| 2226 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); |
| 2227 | break; |
| 2228 | case DEV_STATE_STARTWAIT_TX: |
| 2229 | if (event == DEV_EVENT_RXDOWN) |
| 2230 | fsm_newstate(fi, DEV_STATE_STARTWAIT_RXTX); |
| 2231 | break; |
| 2232 | case DEV_STATE_STOPWAIT_RXTX: |
| 2233 | if (event == DEV_EVENT_TXDOWN) |
| 2234 | fsm_newstate(fi, DEV_STATE_STOPWAIT_RX); |
| 2235 | else |
| 2236 | fsm_newstate(fi, DEV_STATE_STOPWAIT_TX); |
| 2237 | break; |
| 2238 | case DEV_STATE_STOPWAIT_RX: |
| 2239 | if (event == DEV_EVENT_RXDOWN) |
| 2240 | fsm_newstate(fi, DEV_STATE_STOPPED); |
| 2241 | break; |
| 2242 | case DEV_STATE_STOPWAIT_TX: |
| 2243 | if (event == DEV_EVENT_TXDOWN) |
| 2244 | fsm_newstate(fi, DEV_STATE_STOPPED); |
| 2245 | break; |
| 2246 | } |
| 2247 | if (IS_MPC(priv)) { |
| 2248 | if (event == DEV_EVENT_RXDOWN) |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2249 | mpc_channel_action(priv->channel[CTCM_READ], |
| 2250 | CTCM_READ, MPC_CHANNEL_REMOVE); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2251 | else |
Ursula Braun | 3c09e26 | 2010-08-12 01:58:28 +0000 | [diff] [blame] | 2252 | mpc_channel_action(priv->channel[CTCM_WRITE], |
| 2253 | CTCM_WRITE, MPC_CHANNEL_REMOVE); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | const fsm_node dev_fsm[] = { |
| 2258 | { DEV_STATE_STOPPED, DEV_EVENT_START, dev_action_start }, |
| 2259 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_START, dev_action_start }, |
| 2260 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
| 2261 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
| 2262 | { DEV_STATE_STOPWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2263 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_START, dev_action_start }, |
| 2264 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, |
| 2265 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, |
| 2266 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
| 2267 | { DEV_STATE_STOPWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2268 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_START, dev_action_start }, |
| 2269 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, |
| 2270 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, |
| 2271 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
| 2272 | { DEV_STATE_STOPWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2273 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_STOP, dev_action_stop }, |
| 2274 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXUP, dev_action_chup }, |
| 2275 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXUP, dev_action_chup }, |
| 2276 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
| 2277 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
| 2278 | { DEV_STATE_STARTWAIT_RXTX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2279 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_STOP, dev_action_stop }, |
| 2280 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXUP, dev_action_chup }, |
| 2281 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_TXUP, dev_action_chup }, |
| 2282 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RXDOWN, dev_action_chdown }, |
| 2283 | { DEV_STATE_STARTWAIT_TX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2284 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_STOP, dev_action_stop }, |
| 2285 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RXUP, dev_action_chup }, |
| 2286 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXUP, dev_action_chup }, |
| 2287 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_TXDOWN, dev_action_chdown }, |
| 2288 | { DEV_STATE_STARTWAIT_RX, DEV_EVENT_RESTART, dev_action_restart }, |
| 2289 | { DEV_STATE_RUNNING, DEV_EVENT_STOP, dev_action_stop }, |
| 2290 | { DEV_STATE_RUNNING, DEV_EVENT_RXDOWN, dev_action_chdown }, |
| 2291 | { DEV_STATE_RUNNING, DEV_EVENT_TXDOWN, dev_action_chdown }, |
| 2292 | { DEV_STATE_RUNNING, DEV_EVENT_TXUP, ctcm_action_nop }, |
| 2293 | { DEV_STATE_RUNNING, DEV_EVENT_RXUP, ctcm_action_nop }, |
| 2294 | { DEV_STATE_RUNNING, DEV_EVENT_RESTART, dev_action_restart }, |
| 2295 | }; |
| 2296 | |
| 2297 | int dev_fsm_len = ARRAY_SIZE(dev_fsm); |
| 2298 | |
| 2299 | /* --- This is the END my friend --- */ |
| 2300 | |