Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1 | /* |
| 2 | * drivers/s390/net/ctcm_mpc.c |
| 3 | * |
| 4 | * Copyright IBM Corp. 2004, 2007 |
| 5 | * Authors: Belinda Thompson (belindat@us.ibm.com) |
| 6 | * Andy Richter (richtera@us.ibm.com) |
| 7 | * Peter Tiedemann (ptiedem@de.ibm.com) |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | This module exports functions to be used by CCS: |
| 12 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); |
| 13 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); |
| 14 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); |
| 15 | EXPORT_SYMBOL(ctc_mpc_flow_control); |
| 16 | */ |
| 17 | |
| 18 | #undef DEBUG |
| 19 | #undef DEBUGDATA |
| 20 | #undef DEBUGCCW |
| 21 | |
| 22 | #include <linux/version.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/errno.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/timer.h> |
| 31 | #include <linux/sched.h> |
| 32 | |
| 33 | #include <linux/signal.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/proc_fs.h> |
| 36 | |
| 37 | #include <linux/ip.h> |
| 38 | #include <linux/if_arp.h> |
| 39 | #include <linux/tcp.h> |
| 40 | #include <linux/skbuff.h> |
| 41 | #include <linux/ctype.h> |
| 42 | #include <linux/netdevice.h> |
| 43 | #include <net/dst.h> |
| 44 | |
| 45 | #include <linux/io.h> /* instead of <asm/io.h> ok ? */ |
| 46 | #include <asm/ccwdev.h> |
| 47 | #include <asm/ccwgroup.h> |
| 48 | #include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */ |
| 49 | #include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */ |
| 50 | #include <linux/wait.h> |
| 51 | #include <linux/moduleparam.h> |
| 52 | #include <asm/idals.h> |
| 53 | |
| 54 | #include "cu3088.h" |
| 55 | #include "ctcm_mpc.h" |
| 56 | #include "ctcm_main.h" |
| 57 | #include "ctcm_fsms.h" |
| 58 | |
| 59 | static const struct xid2 init_xid = { |
| 60 | .xid2_type_id = XID_FM2, |
| 61 | .xid2_len = 0x45, |
| 62 | .xid2_adj_id = 0, |
| 63 | .xid2_rlen = 0x31, |
| 64 | .xid2_resv1 = 0, |
| 65 | .xid2_flag1 = 0, |
| 66 | .xid2_fmtt = 0, |
| 67 | .xid2_flag4 = 0x80, |
| 68 | .xid2_resv2 = 0, |
| 69 | .xid2_tgnum = 0, |
| 70 | .xid2_sender_id = 0, |
| 71 | .xid2_flag2 = 0, |
| 72 | .xid2_option = XID2_0, |
| 73 | .xid2_resv3 = "\x00", |
| 74 | .xid2_resv4 = 0, |
| 75 | .xid2_dlc_type = XID2_READ_SIDE, |
| 76 | .xid2_resv5 = 0, |
| 77 | .xid2_mpc_flag = 0, |
| 78 | .xid2_resv6 = 0, |
| 79 | .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35), |
| 80 | }; |
| 81 | |
| 82 | static const struct th_header thnorm = { |
| 83 | .th_seg = 0x00, |
| 84 | .th_ch_flag = TH_IS_XID, |
| 85 | .th_blk_flag = TH_DATA_IS_XID, |
| 86 | .th_is_xid = 0x01, |
| 87 | .th_seq_num = 0x00000000, |
| 88 | }; |
| 89 | |
| 90 | static const struct th_header thdummy = { |
| 91 | .th_seg = 0x00, |
| 92 | .th_ch_flag = 0x00, |
| 93 | .th_blk_flag = TH_DATA_IS_XID, |
| 94 | .th_is_xid = 0x01, |
| 95 | .th_seq_num = 0x00000000, |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * Definition of one MPC group |
| 100 | */ |
| 101 | |
| 102 | /* |
| 103 | * Compatibility macros for busy handling |
| 104 | * of network devices. |
| 105 | */ |
| 106 | |
| 107 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb); |
| 108 | |
| 109 | /* |
| 110 | * MPC Group state machine actions (static prototypes) |
| 111 | */ |
| 112 | static void mpc_action_nop(fsm_instance *fsm, int event, void *arg); |
| 113 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg); |
| 114 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg); |
| 115 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg); |
| 116 | static int mpc_validate_xid(struct mpcg_info *mpcginfo); |
| 117 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg); |
| 118 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg); |
| 119 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg); |
| 120 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg); |
| 121 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg); |
| 122 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg); |
| 123 | |
| 124 | #ifdef DEBUGDATA |
| 125 | /*-------------------------------------------------------------------* |
| 126 | * Dump buffer format * |
| 127 | * * |
| 128 | *--------------------------------------------------------------------*/ |
| 129 | void ctcmpc_dumpit(char *buf, int len) |
| 130 | { |
| 131 | __u32 ct, sw, rm, dup; |
| 132 | char *ptr, *rptr; |
| 133 | char tbuf[82], tdup[82]; |
| 134 | #if (UTS_MACHINE == s390x) |
| 135 | char addr[22]; |
| 136 | #else |
| 137 | char addr[12]; |
| 138 | #endif |
| 139 | char boff[12]; |
| 140 | char bhex[82], duphex[82]; |
| 141 | char basc[40]; |
| 142 | |
| 143 | sw = 0; |
| 144 | rptr = ptr = buf; |
| 145 | rm = 16; |
| 146 | duphex[0] = 0x00; |
| 147 | dup = 0; |
| 148 | |
| 149 | for (ct = 0; ct < len; ct++, ptr++, rptr++) { |
| 150 | if (sw == 0) { |
| 151 | #if (UTS_MACHINE == s390x) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 152 | sprintf(addr, "%16.16lx", (__u64)rptr); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 153 | #else |
| 154 | sprintf(addr, "%8.8X", (__u32)rptr); |
| 155 | #endif |
| 156 | |
| 157 | sprintf(boff, "%4.4X", (__u32)ct); |
| 158 | bhex[0] = '\0'; |
| 159 | basc[0] = '\0'; |
| 160 | } |
| 161 | if ((sw == 4) || (sw == 12)) |
| 162 | strcat(bhex, " "); |
| 163 | if (sw == 8) |
| 164 | strcat(bhex, " "); |
| 165 | |
| 166 | #if (UTS_MACHINE == s390x) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 167 | sprintf(tbuf, "%2.2lX", (__u64)*ptr); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 168 | #else |
| 169 | sprintf(tbuf, "%2.2X", (__u32)*ptr); |
| 170 | #endif |
| 171 | |
| 172 | tbuf[2] = '\0'; |
| 173 | strcat(bhex, tbuf); |
| 174 | if ((0 != isprint(*ptr)) && (*ptr >= 0x20)) |
| 175 | basc[sw] = *ptr; |
| 176 | else |
| 177 | basc[sw] = '.'; |
| 178 | |
| 179 | basc[sw+1] = '\0'; |
| 180 | sw++; |
| 181 | rm--; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 182 | if (sw != 16) |
| 183 | continue; |
| 184 | if ((strcmp(duphex, bhex)) != 0) { |
| 185 | if (dup != 0) { |
| 186 | sprintf(tdup, |
| 187 | "Duplicate as above to %s", addr); |
| 188 | ctcm_pr_debug(" --- %s ---\n", |
| 189 | tdup); |
| 190 | } |
| 191 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 192 | addr, boff, bhex, basc); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 193 | dup = 0; |
| 194 | strcpy(duphex, bhex); |
| 195 | } else |
| 196 | dup++; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 197 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 198 | sw = 0; |
| 199 | rm = 16; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 200 | } /* endfor */ |
| 201 | |
| 202 | if (sw != 0) { |
| 203 | for ( ; rm > 0; rm--, sw++) { |
| 204 | if ((sw == 4) || (sw == 12)) |
| 205 | strcat(bhex, " "); |
| 206 | if (sw == 8) |
| 207 | strcat(bhex, " "); |
| 208 | strcat(bhex, " "); |
| 209 | strcat(basc, " "); |
| 210 | } |
| 211 | if (dup != 0) { |
| 212 | sprintf(tdup, "Duplicate as above to %s", addr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 213 | ctcm_pr_debug(" --- %s ---\n", tdup); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 214 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 215 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
| 216 | addr, boff, bhex, basc); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 217 | } else { |
| 218 | if (dup >= 1) { |
| 219 | sprintf(tdup, "Duplicate as above to %s", addr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 220 | ctcm_pr_debug(" --- %s ---\n", tdup); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 221 | } |
| 222 | if (dup != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 223 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 224 | addr, boff, bhex, basc); |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | return; |
| 229 | |
| 230 | } /* end of ctcmpc_dumpit */ |
| 231 | #endif |
| 232 | |
| 233 | #ifdef DEBUGDATA |
| 234 | /* |
| 235 | * Dump header and first 16 bytes of an sk_buff for debugging purposes. |
| 236 | * |
| 237 | * skb The sk_buff to dump. |
| 238 | * offset Offset relative to skb-data, where to start the dump. |
| 239 | */ |
| 240 | void ctcmpc_dump_skb(struct sk_buff *skb, int offset) |
| 241 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 242 | __u8 *p = skb->data; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 243 | struct th_header *header; |
| 244 | struct pdu *pheader; |
| 245 | int bl = skb->len; |
| 246 | int i; |
| 247 | |
| 248 | if (p == NULL) |
| 249 | return; |
| 250 | |
| 251 | p += offset; |
| 252 | header = (struct th_header *)p; |
| 253 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 254 | ctcm_pr_debug("dump:\n"); |
| 255 | ctcm_pr_debug("skb len=%d \n", skb->len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 256 | if (skb->len > 2) { |
| 257 | switch (header->th_ch_flag) { |
| 258 | case TH_HAS_PDU: |
| 259 | break; |
| 260 | case 0x00: |
| 261 | case TH_IS_XID: |
| 262 | if ((header->th_blk_flag == TH_DATA_IS_XID) && |
| 263 | (header->th_is_xid == 0x01)) |
| 264 | goto dumpth; |
| 265 | case TH_SWEEP_REQ: |
| 266 | goto dumpth; |
| 267 | case TH_SWEEP_RESP: |
| 268 | goto dumpth; |
| 269 | default: |
| 270 | break; |
| 271 | } |
| 272 | |
| 273 | pheader = (struct pdu *)p; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 274 | ctcm_pr_debug("pdu->offset: %d hex: %04x\n", |
| 275 | pheader->pdu_offset, pheader->pdu_offset); |
| 276 | ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag); |
| 277 | ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto); |
| 278 | ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 279 | goto dumpdata; |
| 280 | |
| 281 | dumpth: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 282 | ctcm_pr_debug("th->seg : %02x\n", header->th_seg); |
| 283 | ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag); |
| 284 | ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag); |
| 285 | ctcm_pr_debug("th->type : %s\n", |
| 286 | (header->th_is_xid) ? "DATA" : "XID"); |
| 287 | ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 288 | |
| 289 | } |
| 290 | dumpdata: |
| 291 | if (bl > 32) |
| 292 | bl = 32; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 293 | ctcm_pr_debug("data: "); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 294 | for (i = 0; i < bl; i++) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 295 | ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n"); |
| 296 | ctcm_pr_debug("\n"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 297 | } |
| 298 | #endif |
| 299 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 300 | static struct net_device *ctcmpc_get_dev(int port_num) |
| 301 | { |
| 302 | char device[20]; |
| 303 | struct net_device *dev; |
| 304 | struct ctcm_priv *priv; |
| 305 | |
| 306 | sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); |
| 307 | |
| 308 | dev = __dev_get_by_name(&init_net, device); |
| 309 | |
| 310 | if (dev == NULL) { |
| 311 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 312 | "%s: Device not found by name: %s", |
| 313 | CTCM_FUNTAIL, device); |
| 314 | return NULL; |
| 315 | } |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 316 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 317 | if (priv == NULL) { |
| 318 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 319 | "%s(%s): dev->ml_priv is NULL", |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 320 | CTCM_FUNTAIL, device); |
| 321 | return NULL; |
| 322 | } |
| 323 | if (priv->mpcg == NULL) { |
| 324 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 325 | "%s(%s): priv->mpcg is NULL", |
| 326 | CTCM_FUNTAIL, device); |
| 327 | return NULL; |
| 328 | } |
| 329 | return dev; |
| 330 | } |
| 331 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 332 | /* |
| 333 | * ctc_mpc_alloc_channel |
| 334 | * (exported interface) |
| 335 | * |
| 336 | * Device Initialization : |
| 337 | * ACTPATH driven IO operations |
| 338 | */ |
| 339 | int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int)) |
| 340 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 341 | struct net_device *dev; |
| 342 | struct mpc_group *grp; |
| 343 | struct ctcm_priv *priv; |
| 344 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 345 | dev = ctcmpc_get_dev(port_num); |
| 346 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 347 | return 1; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 348 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 349 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 350 | |
| 351 | grp->allochanfunc = callback; |
| 352 | grp->port_num = port_num; |
| 353 | grp->port_persist = 1; |
| 354 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 355 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 356 | "%s(%s): state=%s", |
| 357 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 358 | |
| 359 | switch (fsm_getstate(grp->fsm)) { |
| 360 | case MPCG_STATE_INOP: |
| 361 | /* Group is in the process of terminating */ |
| 362 | grp->alloc_called = 1; |
| 363 | break; |
| 364 | case MPCG_STATE_RESET: |
| 365 | /* MPC Group will transition to state */ |
| 366 | /* MPCG_STATE_XID2INITW iff the minimum number */ |
| 367 | /* of 1 read and 1 write channel have successfully*/ |
| 368 | /* activated */ |
| 369 | /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/ |
| 370 | if (callback) |
| 371 | grp->send_qllc_disc = 1; |
| 372 | case MPCG_STATE_XID0IOWAIT: |
| 373 | fsm_deltimer(&grp->timer); |
| 374 | grp->outstanding_xid2 = 0; |
| 375 | grp->outstanding_xid7 = 0; |
| 376 | grp->outstanding_xid7_p2 = 0; |
| 377 | grp->saved_xid2 = NULL; |
| 378 | if (callback) |
| 379 | ctcm_open(dev); |
| 380 | fsm_event(priv->fsm, DEV_EVENT_START, dev); |
| 381 | break; |
| 382 | case MPCG_STATE_READY: |
| 383 | /* XID exchanges completed after PORT was activated */ |
| 384 | /* Link station already active */ |
| 385 | /* Maybe timing issue...retry callback */ |
| 386 | grp->allocchan_callback_retries++; |
| 387 | if (grp->allocchan_callback_retries < 4) { |
| 388 | if (grp->allochanfunc) |
| 389 | grp->allochanfunc(grp->port_num, |
| 390 | grp->group_max_buflen); |
| 391 | } else { |
| 392 | /* there are problems...bail out */ |
| 393 | /* there may be a state mismatch so restart */ |
| 394 | grp->port_persist = 1; |
| 395 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 396 | grp->allocchan_callback_retries = 0; |
| 397 | } |
| 398 | break; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 399 | } |
| 400 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 401 | return 0; |
| 402 | } |
| 403 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); |
| 404 | |
| 405 | /* |
| 406 | * ctc_mpc_establish_connectivity |
| 407 | * (exported interface) |
| 408 | */ |
| 409 | void ctc_mpc_establish_connectivity(int port_num, |
| 410 | void (*callback)(int, int, int)) |
| 411 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 412 | struct net_device *dev; |
| 413 | struct mpc_group *grp; |
| 414 | struct ctcm_priv *priv; |
| 415 | struct channel *rch, *wch; |
| 416 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 417 | dev = ctcmpc_get_dev(port_num); |
| 418 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 419 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 420 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 421 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 422 | rch = priv->channel[READ]; |
| 423 | wch = priv->channel[WRITE]; |
| 424 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 425 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 426 | "%s(%s): state=%s", |
| 427 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 428 | |
| 429 | grp->estconnfunc = callback; |
| 430 | grp->port_num = port_num; |
| 431 | |
| 432 | switch (fsm_getstate(grp->fsm)) { |
| 433 | case MPCG_STATE_READY: |
| 434 | /* XID exchanges completed after PORT was activated */ |
| 435 | /* Link station already active */ |
| 436 | /* Maybe timing issue...retry callback */ |
| 437 | fsm_deltimer(&grp->timer); |
| 438 | grp->estconn_callback_retries++; |
| 439 | if (grp->estconn_callback_retries < 4) { |
| 440 | if (grp->estconnfunc) { |
| 441 | grp->estconnfunc(grp->port_num, 0, |
| 442 | grp->group_max_buflen); |
| 443 | grp->estconnfunc = NULL; |
| 444 | } |
| 445 | } else { |
| 446 | /* there are problems...bail out */ |
| 447 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 448 | grp->estconn_callback_retries = 0; |
| 449 | } |
| 450 | break; |
| 451 | case MPCG_STATE_INOP: |
| 452 | case MPCG_STATE_RESET: |
| 453 | /* MPC Group is not ready to start XID - min num of */ |
| 454 | /* 1 read and 1 write channel have not been acquired*/ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 455 | |
| 456 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 457 | "%s(%s): REJECTED - inactive channels", |
| 458 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 459 | if (grp->estconnfunc) { |
| 460 | grp->estconnfunc(grp->port_num, -1, 0); |
| 461 | grp->estconnfunc = NULL; |
| 462 | } |
| 463 | break; |
| 464 | case MPCG_STATE_XID2INITW: |
| 465 | /* alloc channel was called but no XID exchange */ |
| 466 | /* has occurred. initiate xside XID exchange */ |
| 467 | /* make sure yside XID0 processing has not started */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 468 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 469 | if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) || |
| 470 | (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 471 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 472 | "%s(%s): ABORT - PASSIVE XID", |
| 473 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 474 | break; |
| 475 | } |
| 476 | grp->send_qllc_disc = 1; |
| 477 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT); |
| 478 | fsm_deltimer(&grp->timer); |
| 479 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, |
| 480 | MPCG_EVENT_TIMER, dev); |
| 481 | grp->outstanding_xid7 = 0; |
| 482 | grp->outstanding_xid7_p2 = 0; |
| 483 | grp->saved_xid2 = NULL; |
| 484 | if ((rch->in_mpcgroup) && |
| 485 | (fsm_getstate(rch->fsm) == CH_XID0_PENDING)) |
| 486 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch); |
| 487 | else { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 488 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 489 | "%s(%s): RX-%s not ready for ACTIVE XID0", |
| 490 | CTCM_FUNTAIL, dev->name, rch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 491 | if (grp->estconnfunc) { |
| 492 | grp->estconnfunc(grp->port_num, -1, 0); |
| 493 | grp->estconnfunc = NULL; |
| 494 | } |
| 495 | fsm_deltimer(&grp->timer); |
| 496 | goto done; |
| 497 | } |
| 498 | if ((wch->in_mpcgroup) && |
| 499 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) |
| 500 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch); |
| 501 | else { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 502 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 503 | "%s(%s): WX-%s not ready for ACTIVE XID0", |
| 504 | CTCM_FUNTAIL, dev->name, wch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 505 | if (grp->estconnfunc) { |
| 506 | grp->estconnfunc(grp->port_num, -1, 0); |
| 507 | grp->estconnfunc = NULL; |
| 508 | } |
| 509 | fsm_deltimer(&grp->timer); |
| 510 | goto done; |
| 511 | } |
| 512 | break; |
| 513 | case MPCG_STATE_XID0IOWAIT: |
| 514 | /* already in active XID negotiations */ |
| 515 | default: |
| 516 | break; |
| 517 | } |
| 518 | |
| 519 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 520 | CTCM_PR_DEBUG("Exit %s()\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 521 | return; |
| 522 | } |
| 523 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); |
| 524 | |
| 525 | /* |
| 526 | * ctc_mpc_dealloc_ch |
| 527 | * (exported interface) |
| 528 | */ |
| 529 | void ctc_mpc_dealloc_ch(int port_num) |
| 530 | { |
| 531 | struct net_device *dev; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 532 | struct ctcm_priv *priv; |
| 533 | struct mpc_group *grp; |
| 534 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 535 | dev = ctcmpc_get_dev(port_num); |
| 536 | if (dev == NULL) |
| 537 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 538 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 539 | grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 540 | |
| 541 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG, |
| 542 | "%s: %s: refcount = %d\n", |
| 543 | CTCM_FUNTAIL, dev->name, atomic_read(&dev->refcnt)); |
| 544 | |
| 545 | fsm_deltimer(&priv->restart_timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 546 | grp->channels_terminating = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 547 | fsm_deltimer(&grp->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 548 | grp->allochanfunc = NULL; |
| 549 | grp->estconnfunc = NULL; |
| 550 | grp->port_persist = 0; |
| 551 | grp->send_qllc_disc = 0; |
| 552 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 553 | |
| 554 | ctcm_close(dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 555 | return; |
| 556 | } |
| 557 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); |
| 558 | |
| 559 | /* |
| 560 | * ctc_mpc_flow_control |
| 561 | * (exported interface) |
| 562 | */ |
| 563 | void ctc_mpc_flow_control(int port_num, int flowc) |
| 564 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 565 | struct ctcm_priv *priv; |
| 566 | struct mpc_group *grp; |
| 567 | struct net_device *dev; |
| 568 | struct channel *rch; |
| 569 | int mpcg_state; |
| 570 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 571 | dev = ctcmpc_get_dev(port_num); |
| 572 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 573 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 574 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 575 | grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 576 | |
| 577 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 578 | "%s: %s: flowc = %d", |
| 579 | CTCM_FUNTAIL, dev->name, flowc); |
| 580 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 581 | rch = priv->channel[READ]; |
| 582 | |
| 583 | mpcg_state = fsm_getstate(grp->fsm); |
| 584 | switch (flowc) { |
| 585 | case 1: |
| 586 | if (mpcg_state == MPCG_STATE_FLOWC) |
| 587 | break; |
| 588 | if (mpcg_state == MPCG_STATE_READY) { |
| 589 | if (grp->flow_off_called == 1) |
| 590 | grp->flow_off_called = 0; |
| 591 | else |
| 592 | fsm_newstate(grp->fsm, MPCG_STATE_FLOWC); |
| 593 | break; |
| 594 | } |
| 595 | break; |
| 596 | case 0: |
| 597 | if (mpcg_state == MPCG_STATE_FLOWC) { |
| 598 | fsm_newstate(grp->fsm, MPCG_STATE_READY); |
| 599 | /* ensure any data that has accumulated */ |
| 600 | /* on the io_queue will now be sen t */ |
| 601 | tasklet_schedule(&rch->ch_tasklet); |
| 602 | } |
| 603 | /* possible race condition */ |
| 604 | if (mpcg_state == MPCG_STATE_READY) { |
| 605 | grp->flow_off_called = 1; |
| 606 | break; |
| 607 | } |
| 608 | break; |
| 609 | } |
| 610 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 611 | } |
| 612 | EXPORT_SYMBOL(ctc_mpc_flow_control); |
| 613 | |
| 614 | static int mpc_send_qllc_discontact(struct net_device *); |
| 615 | |
| 616 | /* |
| 617 | * helper function of ctcmpc_unpack_skb |
| 618 | */ |
| 619 | static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) |
| 620 | { |
| 621 | struct channel *rch = mpcginfo->ch; |
| 622 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 623 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 624 | struct mpc_group *grp = priv->mpcg; |
| 625 | struct channel *ch = priv->channel[WRITE]; |
| 626 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 627 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
| 628 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 629 | |
| 630 | grp->sweep_rsp_pend_num--; |
| 631 | |
| 632 | if ((grp->sweep_req_pend_num == 0) && |
| 633 | (grp->sweep_rsp_pend_num == 0)) { |
| 634 | fsm_deltimer(&ch->sweep_timer); |
| 635 | grp->in_sweep = 0; |
| 636 | rch->th_seq_num = 0x00; |
| 637 | ch->th_seq_num = 0x00; |
| 638 | ctcm_clear_busy_do(dev); |
| 639 | } |
| 640 | |
| 641 | kfree(mpcginfo); |
| 642 | |
| 643 | return; |
| 644 | |
| 645 | } |
| 646 | |
| 647 | /* |
| 648 | * helper function of mpc_rcvd_sweep_req |
| 649 | * which is a helper of ctcmpc_unpack_skb |
| 650 | */ |
| 651 | static void ctcmpc_send_sweep_resp(struct channel *rch) |
| 652 | { |
| 653 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 654 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 655 | struct mpc_group *grp = priv->mpcg; |
| 656 | int rc = 0; |
| 657 | struct th_sweep *header; |
| 658 | struct sk_buff *sweep_skb; |
| 659 | struct channel *ch = priv->channel[WRITE]; |
| 660 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 661 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, rch, rch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 662 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 663 | sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 664 | if (sweep_skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 665 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 666 | "%s(%s): sweep_skb allocation ERROR\n", |
| 667 | CTCM_FUNTAIL, rch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 668 | rc = -ENOMEM; |
| 669 | goto done; |
| 670 | } |
| 671 | |
| 672 | header = (struct th_sweep *) |
| 673 | kmalloc(sizeof(struct th_sweep), gfp_type()); |
| 674 | |
| 675 | if (!header) { |
| 676 | dev_kfree_skb_any(sweep_skb); |
| 677 | rc = -ENOMEM; |
| 678 | goto done; |
| 679 | } |
| 680 | |
| 681 | header->th.th_seg = 0x00 ; |
| 682 | header->th.th_ch_flag = TH_SWEEP_RESP; |
| 683 | header->th.th_blk_flag = 0x00; |
| 684 | header->th.th_is_xid = 0x00; |
| 685 | header->th.th_seq_num = 0x00; |
| 686 | header->sw.th_last_seq = ch->th_seq_num; |
| 687 | |
| 688 | memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH); |
| 689 | |
| 690 | kfree(header); |
| 691 | |
| 692 | dev->trans_start = jiffies; |
| 693 | skb_queue_tail(&ch->sweep_queue, sweep_skb); |
| 694 | |
| 695 | fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch); |
| 696 | |
| 697 | return; |
| 698 | |
| 699 | done: |
| 700 | if (rc != 0) { |
| 701 | grp->in_sweep = 0; |
| 702 | ctcm_clear_busy_do(dev); |
| 703 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 704 | } |
| 705 | |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | /* |
| 710 | * helper function of ctcmpc_unpack_skb |
| 711 | */ |
| 712 | static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo) |
| 713 | { |
| 714 | struct channel *rch = mpcginfo->ch; |
| 715 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 716 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 717 | struct mpc_group *grp = priv->mpcg; |
| 718 | struct channel *ch = priv->channel[WRITE]; |
| 719 | |
| 720 | if (do_debug) |
| 721 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 722 | " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 723 | |
| 724 | if (grp->in_sweep == 0) { |
| 725 | grp->in_sweep = 1; |
| 726 | ctcm_test_and_set_busy(dev); |
| 727 | grp->sweep_req_pend_num = grp->active_channels[READ]; |
| 728 | grp->sweep_rsp_pend_num = grp->active_channels[READ]; |
| 729 | } |
| 730 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 731 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 732 | |
| 733 | grp->sweep_req_pend_num--; |
| 734 | ctcmpc_send_sweep_resp(ch); |
| 735 | kfree(mpcginfo); |
| 736 | return; |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | * MPC Group Station FSM definitions |
| 741 | */ |
| 742 | static const char *mpcg_event_names[] = { |
| 743 | [MPCG_EVENT_INOP] = "INOP Condition", |
| 744 | [MPCG_EVENT_DISCONC] = "Discontact Received", |
| 745 | [MPCG_EVENT_XID0DO] = "Channel Active - Start XID", |
| 746 | [MPCG_EVENT_XID2] = "XID2 Received", |
| 747 | [MPCG_EVENT_XID2DONE] = "XID0 Complete", |
| 748 | [MPCG_EVENT_XID7DONE] = "XID7 Complete", |
| 749 | [MPCG_EVENT_TIMER] = "XID Setup Timer", |
| 750 | [MPCG_EVENT_DOIO] = "XID DoIO", |
| 751 | }; |
| 752 | |
| 753 | static const char *mpcg_state_names[] = { |
| 754 | [MPCG_STATE_RESET] = "Reset", |
| 755 | [MPCG_STATE_INOP] = "INOP", |
| 756 | [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start", |
| 757 | [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete", |
| 758 | [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start", |
| 759 | [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete", |
| 760 | [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start", |
| 761 | [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete", |
| 762 | [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start", |
| 763 | [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ", |
| 764 | [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ", |
| 765 | [MPCG_STATE_FLOWC] = "FLOW CONTROL ON", |
| 766 | [MPCG_STATE_READY] = "READY", |
| 767 | }; |
| 768 | |
| 769 | /* |
| 770 | * The MPC Group Station FSM |
| 771 | * 22 events |
| 772 | */ |
| 773 | static const fsm_node mpcg_fsm[] = { |
| 774 | { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 775 | { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop }, |
| 776 | { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 777 | |
| 778 | { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 779 | { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 780 | |
| 781 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 782 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 783 | { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 784 | { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 785 | { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 786 | |
| 787 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 788 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 789 | { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 790 | { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 791 | { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 792 | |
| 793 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, |
| 794 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 795 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 796 | { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 797 | { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 798 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 799 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 800 | |
| 801 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 802 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 803 | { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 804 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 805 | { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 806 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 807 | |
| 808 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 809 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 810 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 811 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 812 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 813 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 814 | |
| 815 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 816 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 817 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 818 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 819 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 820 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 821 | |
| 822 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, |
| 823 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 824 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 825 | { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 826 | { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 827 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 828 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 829 | |
| 830 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 831 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 832 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 833 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 834 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 835 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 836 | |
| 837 | { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 838 | { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready }, |
| 839 | }; |
| 840 | |
| 841 | static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm); |
| 842 | |
| 843 | /* |
| 844 | * MPC Group Station FSM action |
| 845 | * CTCM_PROTO_MPC only |
| 846 | */ |
| 847 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg) |
| 848 | { |
| 849 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 850 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 851 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 852 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 853 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 854 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 855 | "%s(%s): No MPC group", |
| 856 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 857 | return; |
| 858 | } |
| 859 | |
| 860 | fsm_deltimer(&grp->timer); |
| 861 | |
| 862 | if (grp->saved_xid2->xid2_flag2 == 0x40) { |
| 863 | priv->xid->xid2_flag2 = 0x00; |
| 864 | if (grp->estconnfunc) { |
| 865 | grp->estconnfunc(grp->port_num, 1, |
| 866 | grp->group_max_buflen); |
| 867 | grp->estconnfunc = NULL; |
| 868 | } else if (grp->allochanfunc) |
| 869 | grp->send_qllc_disc = 1; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 870 | |
| 871 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 872 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 873 | "%s(%s): fails", |
| 874 | CTCM_FUNTAIL, dev->name); |
| 875 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | grp->port_persist = 1; |
| 879 | grp->out_of_sequence = 0; |
| 880 | grp->estconn_called = 0; |
| 881 | |
| 882 | tasklet_hi_schedule(&grp->mpc_tasklet2); |
| 883 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 884 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 885 | } |
| 886 | |
| 887 | /* |
| 888 | * helper of ctcm_init_netdevice |
| 889 | * CTCM_PROTO_MPC only |
| 890 | */ |
| 891 | void mpc_group_ready(unsigned long adev) |
| 892 | { |
| 893 | struct net_device *dev = (struct net_device *)adev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 894 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 895 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 896 | struct channel *ch = NULL; |
| 897 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 898 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 899 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 900 | "%s(%s): No MPC group", |
| 901 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 902 | return; |
| 903 | } |
| 904 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 905 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
| 906 | "%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n", |
| 907 | CTCM_FUNTAIL, dev->name, grp->group_max_buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 908 | |
| 909 | fsm_newstate(grp->fsm, MPCG_STATE_READY); |
| 910 | |
| 911 | /* Put up a read on the channel */ |
| 912 | ch = priv->channel[READ]; |
| 913 | ch->pdu_seq = 0; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 914 | CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" , |
| 915 | __func__, ch->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 916 | |
| 917 | ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch); |
| 918 | /* Put the write channel in idle state */ |
| 919 | ch = priv->channel[WRITE]; |
| 920 | if (ch->collect_len > 0) { |
| 921 | spin_lock(&ch->collect_lock); |
| 922 | ctcm_purge_skb_queue(&ch->collect_queue); |
| 923 | ch->collect_len = 0; |
| 924 | spin_unlock(&ch->collect_lock); |
| 925 | } |
| 926 | ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 927 | ctcm_clear_busy(dev); |
| 928 | |
| 929 | if (grp->estconnfunc) { |
| 930 | grp->estconnfunc(grp->port_num, 0, |
| 931 | grp->group_max_buflen); |
| 932 | grp->estconnfunc = NULL; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 933 | } else if (grp->allochanfunc) |
| 934 | grp->allochanfunc(grp->port_num, grp->group_max_buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 935 | |
| 936 | grp->send_qllc_disc = 1; |
| 937 | grp->changed_side = 0; |
| 938 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 939 | return; |
| 940 | |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * Increment the MPC Group Active Channel Counts |
| 945 | * helper of dev_action (called from channel fsm) |
| 946 | */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 947 | void mpc_channel_action(struct channel *ch, int direction, int action) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 948 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 949 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 950 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 951 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 952 | |
| 953 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 954 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 955 | "%s(%s): No MPC group", |
| 956 | CTCM_FUNTAIL, dev->name); |
| 957 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 958 | } |
| 959 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 960 | CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
| 961 | |
| 962 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 963 | "%s: %i / Grp:%s total_channels=%i, active_channels: " |
| 964 | "read=%i, write=%i\n", __func__, action, |
| 965 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, |
| 966 | grp->active_channels[READ], grp->active_channels[WRITE]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 967 | |
| 968 | if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) { |
| 969 | grp->num_channel_paths++; |
| 970 | grp->active_channels[direction]++; |
| 971 | grp->outstanding_xid2++; |
| 972 | ch->in_mpcgroup = 1; |
| 973 | |
| 974 | if (ch->xid_skb != NULL) |
| 975 | dev_kfree_skb_any(ch->xid_skb); |
| 976 | |
| 977 | ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, |
| 978 | GFP_ATOMIC | GFP_DMA); |
| 979 | if (ch->xid_skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 980 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 981 | "%s(%s): Couldn't alloc ch xid_skb\n", |
| 982 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 983 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 984 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 985 | } |
| 986 | ch->xid_skb_data = ch->xid_skb->data; |
| 987 | ch->xid_th = (struct th_header *)ch->xid_skb->data; |
| 988 | skb_put(ch->xid_skb, TH_HEADER_LENGTH); |
| 989 | ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb); |
| 990 | skb_put(ch->xid_skb, XID2_LENGTH); |
| 991 | ch->xid_id = skb_tail_pointer(ch->xid_skb); |
| 992 | ch->xid_skb->data = ch->xid_skb_data; |
| 993 | skb_reset_tail_pointer(ch->xid_skb); |
| 994 | ch->xid_skb->len = 0; |
| 995 | |
| 996 | memcpy(skb_put(ch->xid_skb, grp->xid_skb->len), |
| 997 | grp->xid_skb->data, |
| 998 | grp->xid_skb->len); |
| 999 | |
| 1000 | ch->xid->xid2_dlc_type = ((CHANNEL_DIRECTION(ch->flags) == READ) |
| 1001 | ? XID2_READ_SIDE : XID2_WRITE_SIDE); |
| 1002 | |
| 1003 | if (CHANNEL_DIRECTION(ch->flags) == WRITE) |
| 1004 | ch->xid->xid2_buf_len = 0x00; |
| 1005 | |
| 1006 | ch->xid_skb->data = ch->xid_skb_data; |
| 1007 | skb_reset_tail_pointer(ch->xid_skb); |
| 1008 | ch->xid_skb->len = 0; |
| 1009 | |
| 1010 | fsm_newstate(ch->fsm, CH_XID0_PENDING); |
| 1011 | |
| 1012 | if ((grp->active_channels[READ] > 0) && |
| 1013 | (grp->active_channels[WRITE] > 0) && |
| 1014 | (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) { |
| 1015 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1016 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
| 1017 | "%s: %s: MPC GROUP CHANNELS ACTIVE\n", |
| 1018 | __func__, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1019 | } |
| 1020 | } else if ((action == MPC_CHANNEL_REMOVE) && |
| 1021 | (ch->in_mpcgroup == 1)) { |
| 1022 | ch->in_mpcgroup = 0; |
| 1023 | grp->num_channel_paths--; |
| 1024 | grp->active_channels[direction]--; |
| 1025 | |
| 1026 | if (ch->xid_skb != NULL) |
| 1027 | dev_kfree_skb_any(ch->xid_skb); |
| 1028 | ch->xid_skb = NULL; |
| 1029 | |
| 1030 | if (grp->channels_terminating) |
| 1031 | goto done; |
| 1032 | |
| 1033 | if (((grp->active_channels[READ] == 0) && |
| 1034 | (grp->active_channels[WRITE] > 0)) |
| 1035 | || ((grp->active_channels[WRITE] == 0) && |
| 1036 | (grp->active_channels[READ] > 0))) |
| 1037 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1038 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1039 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1040 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 1041 | "exit %s: %i / Grp:%s total_channels=%i, active_channels: " |
| 1042 | "read=%i, write=%i\n", __func__, action, |
| 1043 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, |
| 1044 | grp->active_channels[READ], grp->active_channels[WRITE]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1045 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1046 | CTCM_PR_DEBUG("exit %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /** |
| 1050 | * Unpack a just received skb and hand it over to |
| 1051 | * upper layers. |
| 1052 | * special MPC version of unpack_skb. |
| 1053 | * |
| 1054 | * ch The channel where this skb has been received. |
| 1055 | * pskb The received skb. |
| 1056 | */ |
| 1057 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) |
| 1058 | { |
| 1059 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1060 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1061 | struct mpc_group *grp = priv->mpcg; |
| 1062 | struct pdu *curr_pdu; |
| 1063 | struct mpcg_info *mpcginfo; |
| 1064 | struct th_header *header = NULL; |
| 1065 | struct th_sweep *sweep = NULL; |
| 1066 | int pdu_last_seen = 0; |
| 1067 | __u32 new_len; |
| 1068 | struct sk_buff *skb; |
| 1069 | int skblen; |
| 1070 | int sendrc = 0; |
| 1071 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1072 | CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n", |
| 1073 | __func__, dev->name, smp_processor_id(), ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1074 | |
| 1075 | header = (struct th_header *)pskb->data; |
| 1076 | if ((header->th_seg == 0) && |
| 1077 | (header->th_ch_flag == 0) && |
| 1078 | (header->th_blk_flag == 0) && |
| 1079 | (header->th_seq_num == 0)) |
| 1080 | /* nothing for us */ goto done; |
| 1081 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1082 | CTCM_PR_DBGDATA("%s: th_header\n", __func__); |
| 1083 | CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH); |
| 1084 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1085 | |
| 1086 | pskb->dev = dev; |
| 1087 | pskb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1088 | skb_pull(pskb, TH_HEADER_LENGTH); |
| 1089 | |
| 1090 | if (likely(header->th_ch_flag == TH_HAS_PDU)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1091 | CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1092 | if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) || |
| 1093 | ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) && |
| 1094 | (header->th_seq_num != ch->th_seq_num + 1) && |
| 1095 | (ch->th_seq_num != 0))) { |
| 1096 | /* This is NOT the next segment * |
| 1097 | * we are not the correct race winner * |
| 1098 | * go away and let someone else win * |
| 1099 | * BUT..this only applies if xid negot * |
| 1100 | * is done * |
| 1101 | */ |
| 1102 | grp->out_of_sequence += 1; |
| 1103 | __skb_push(pskb, TH_HEADER_LENGTH); |
| 1104 | skb_queue_tail(&ch->io_queue, pskb); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1105 | CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x " |
| 1106 | "got:%08x\n", __func__, |
| 1107 | ch->th_seq_num + 1, header->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1108 | |
| 1109 | return; |
| 1110 | } |
| 1111 | grp->out_of_sequence = 0; |
| 1112 | ch->th_seq_num = header->th_seq_num; |
| 1113 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1114 | CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n", |
| 1115 | __func__, ch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1116 | |
| 1117 | if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY)) |
| 1118 | goto done; |
| 1119 | pdu_last_seen = 0; |
| 1120 | while ((pskb->len > 0) && !pdu_last_seen) { |
| 1121 | curr_pdu = (struct pdu *)pskb->data; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1122 | |
| 1123 | CTCM_PR_DBGDATA("%s: pdu_header\n", __func__); |
| 1124 | CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH); |
| 1125 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", |
| 1126 | __func__, pskb->len); |
| 1127 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1128 | skb_pull(pskb, PDU_HEADER_LENGTH); |
| 1129 | |
| 1130 | if (curr_pdu->pdu_flag & PDU_LAST) |
| 1131 | pdu_last_seen = 1; |
| 1132 | if (curr_pdu->pdu_flag & PDU_CNTL) |
| 1133 | pskb->protocol = htons(ETH_P_SNAP); |
| 1134 | else |
| 1135 | pskb->protocol = htons(ETH_P_SNA_DIX); |
| 1136 | |
| 1137 | if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1138 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1139 | "%s(%s): Dropping packet with " |
| 1140 | "illegal siize %d", |
| 1141 | CTCM_FUNTAIL, dev->name, pskb->len); |
| 1142 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1143 | priv->stats.rx_dropped++; |
| 1144 | priv->stats.rx_length_errors++; |
| 1145 | goto done; |
| 1146 | } |
| 1147 | skb_reset_mac_header(pskb); |
| 1148 | new_len = curr_pdu->pdu_offset; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1149 | CTCM_PR_DBGDATA("%s: new_len: %04x \n", |
| 1150 | __func__, new_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1151 | if ((new_len == 0) || (new_len > pskb->len)) { |
| 1152 | /* should never happen */ |
| 1153 | /* pskb len must be hosed...bail out */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1154 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1155 | "%s(%s): non valid pdu_offset: %04x", |
| 1156 | /* "data may be lost", */ |
| 1157 | CTCM_FUNTAIL, dev->name, new_len); |
| 1158 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1159 | } |
| 1160 | skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC); |
| 1161 | |
| 1162 | if (!skb) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1163 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1164 | "%s(%s): MEMORY allocation error", |
| 1165 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1166 | priv->stats.rx_dropped++; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1167 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1168 | goto done; |
| 1169 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1170 | memcpy(skb_put(skb, new_len), pskb->data, new_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1171 | |
| 1172 | skb_reset_mac_header(skb); |
| 1173 | skb->dev = pskb->dev; |
| 1174 | skb->protocol = pskb->protocol; |
| 1175 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1176 | *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq; |
| 1177 | ch->pdu_seq++; |
| 1178 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1179 | if (do_debug_data) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1180 | ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n", |
| 1181 | __func__, ch->pdu_seq); |
| 1182 | ctcm_pr_debug("%s: skb:%0lx " |
| 1183 | "skb len: %d \n", __func__, |
| 1184 | (unsigned long)skb, skb->len); |
| 1185 | ctcm_pr_debug("%s: up to 32 bytes " |
| 1186 | "of pdu_data sent\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1187 | ctcmpc_dump32((char *)skb->data, skb->len); |
| 1188 | } |
| 1189 | |
| 1190 | skblen = skb->len; |
| 1191 | sendrc = netif_rx(skb); |
| 1192 | priv->stats.rx_packets++; |
| 1193 | priv->stats.rx_bytes += skblen; |
| 1194 | skb_pull(pskb, new_len); /* point to next PDU */ |
| 1195 | } |
| 1196 | } else { |
| 1197 | mpcginfo = (struct mpcg_info *) |
| 1198 | kmalloc(sizeof(struct mpcg_info), gfp_type()); |
| 1199 | if (mpcginfo == NULL) |
| 1200 | goto done; |
| 1201 | |
| 1202 | mpcginfo->ch = ch; |
| 1203 | mpcginfo->th = header; |
| 1204 | mpcginfo->skb = pskb; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1205 | CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n", |
| 1206 | __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1207 | /* it's a sweep? */ |
| 1208 | sweep = (struct th_sweep *)pskb->data; |
| 1209 | mpcginfo->sweep = sweep; |
| 1210 | if (header->th_ch_flag == TH_SWEEP_REQ) |
| 1211 | mpc_rcvd_sweep_req(mpcginfo); |
| 1212 | else if (header->th_ch_flag == TH_SWEEP_RESP) |
| 1213 | mpc_rcvd_sweep_resp(mpcginfo); |
| 1214 | else if (header->th_blk_flag == TH_DATA_IS_XID) { |
| 1215 | struct xid2 *thisxid = (struct xid2 *)pskb->data; |
| 1216 | skb_pull(pskb, XID2_LENGTH); |
| 1217 | mpcginfo->xid = thisxid; |
| 1218 | fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo); |
| 1219 | } else if (header->th_blk_flag == TH_DISCONTACT) |
| 1220 | fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo); |
| 1221 | else if (header->th_seq_num != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1222 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1223 | "%s(%s): control pkt expected\n", |
| 1224 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1225 | priv->stats.rx_dropped++; |
| 1226 | /* mpcginfo only used for non-data transfers */ |
| 1227 | kfree(mpcginfo); |
| 1228 | if (do_debug_data) |
| 1229 | ctcmpc_dump_skb(pskb, -8); |
| 1230 | } |
| 1231 | } |
| 1232 | done: |
| 1233 | |
| 1234 | dev_kfree_skb_any(pskb); |
| 1235 | if (sendrc == NET_RX_DROP) { |
| 1236 | printk(KERN_WARNING "%s %s() NETWORK BACKLOG EXCEEDED" |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1237 | " - PACKET DROPPED\n", dev->name, __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1238 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1239 | } |
| 1240 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1241 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
| 1242 | __func__, dev->name, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | /** |
| 1246 | * tasklet helper for mpc's skb unpacking. |
| 1247 | * |
| 1248 | * ch The channel to work on. |
| 1249 | * Allow flow control back pressure to occur here. |
| 1250 | * Throttling back channel can result in excessive |
| 1251 | * channel inactivity and system deact of channel |
| 1252 | */ |
| 1253 | void ctcmpc_bh(unsigned long thischan) |
| 1254 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1255 | struct channel *ch = (struct channel *)thischan; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1256 | struct sk_buff *skb; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1257 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1258 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1259 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1260 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1261 | CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n", |
| 1262 | dev->name, smp_processor_id(), __func__, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1263 | /* caller has requested driver to throttle back */ |
| 1264 | while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) && |
| 1265 | (skb = skb_dequeue(&ch->io_queue))) { |
| 1266 | ctcmpc_unpack_skb(ch, skb); |
| 1267 | if (grp->out_of_sequence > 20) { |
| 1268 | /* assume data loss has occurred if */ |
| 1269 | /* missing seq_num for extended */ |
| 1270 | /* period of time */ |
| 1271 | grp->out_of_sequence = 0; |
| 1272 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1273 | break; |
| 1274 | } |
| 1275 | if (skb == skb_peek(&ch->io_queue)) |
| 1276 | break; |
| 1277 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1278 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
| 1279 | __func__, dev->name, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | /* |
| 1284 | * MPC Group Initializations |
| 1285 | */ |
| 1286 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv) |
| 1287 | { |
| 1288 | struct mpc_group *grp; |
| 1289 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1290 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 1291 | "Enter %s(%p)", CTCM_FUNTAIL, priv); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1292 | |
| 1293 | grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL); |
| 1294 | if (grp == NULL) |
| 1295 | return NULL; |
| 1296 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1297 | grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names, |
| 1298 | MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm, |
| 1299 | mpcg_fsm_len, GFP_KERNEL); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1300 | if (grp->fsm == NULL) { |
| 1301 | kfree(grp); |
| 1302 | return NULL; |
| 1303 | } |
| 1304 | |
| 1305 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
| 1306 | fsm_settimer(grp->fsm, &grp->timer); |
| 1307 | |
| 1308 | grp->xid_skb = |
| 1309 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
| 1310 | if (grp->xid_skb == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1311 | kfree_fsm(grp->fsm); |
| 1312 | kfree(grp); |
| 1313 | return NULL; |
| 1314 | } |
| 1315 | /* base xid for all channels in group */ |
| 1316 | grp->xid_skb_data = grp->xid_skb->data; |
| 1317 | grp->xid_th = (struct th_header *)grp->xid_skb->data; |
| 1318 | memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH), |
| 1319 | &thnorm, TH_HEADER_LENGTH); |
| 1320 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1321 | grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1322 | memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH); |
| 1323 | grp->xid->xid2_adj_id = jiffies | 0xfff00000; |
| 1324 | grp->xid->xid2_sender_id = jiffies; |
| 1325 | |
| 1326 | grp->xid_id = skb_tail_pointer(grp->xid_skb); |
| 1327 | memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4); |
| 1328 | |
| 1329 | grp->rcvd_xid_skb = |
| 1330 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA); |
| 1331 | if (grp->rcvd_xid_skb == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1332 | kfree_fsm(grp->fsm); |
| 1333 | dev_kfree_skb(grp->xid_skb); |
| 1334 | kfree(grp); |
| 1335 | return NULL; |
| 1336 | } |
| 1337 | grp->rcvd_xid_data = grp->rcvd_xid_skb->data; |
| 1338 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; |
| 1339 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), |
| 1340 | &thnorm, TH_HEADER_LENGTH); |
| 1341 | grp->saved_xid2 = NULL; |
| 1342 | priv->xid = grp->xid; |
| 1343 | priv->mpcg = grp; |
| 1344 | return grp; |
| 1345 | } |
| 1346 | |
| 1347 | /* |
| 1348 | * The MPC Group Station FSM |
| 1349 | */ |
| 1350 | |
| 1351 | /* |
| 1352 | * MPC Group Station FSM actions |
| 1353 | * CTCM_PROTO_MPC only |
| 1354 | */ |
| 1355 | |
| 1356 | /** |
| 1357 | * NOP action for statemachines |
| 1358 | */ |
| 1359 | static void mpc_action_nop(fsm_instance *fi, int event, void *arg) |
| 1360 | { |
| 1361 | } |
| 1362 | |
| 1363 | /* |
| 1364 | * invoked when the device transitions to dev_stopped |
| 1365 | * MPC will stop each individual channel if a single XID failure |
| 1366 | * occurs, or will intitiate all channels be stopped if a GROUP |
| 1367 | * level failure occurs. |
| 1368 | */ |
| 1369 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg) |
| 1370 | { |
| 1371 | struct net_device *dev = arg; |
| 1372 | struct ctcm_priv *priv; |
| 1373 | struct mpc_group *grp; |
| 1374 | int rc = 0; |
| 1375 | struct channel *wch, *rch; |
| 1376 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1377 | BUG_ON(dev == NULL); |
| 1378 | CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1379 | |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1380 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1381 | grp = priv->mpcg; |
| 1382 | grp->flow_off_called = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1383 | fsm_deltimer(&grp->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1384 | if (grp->channels_terminating) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1385 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1386 | |
| 1387 | grp->channels_terminating = 1; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1388 | grp->saved_state = fsm_getstate(grp->fsm); |
| 1389 | fsm_newstate(grp->fsm, MPCG_STATE_INOP); |
| 1390 | if (grp->saved_state > MPCG_STATE_XID7INITF) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1391 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1392 | "%s(%s): MPC GROUP INOPERATIVE", |
| 1393 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1394 | if ((grp->saved_state != MPCG_STATE_RESET) || |
| 1395 | /* dealloc_channel has been called */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1396 | ((grp->saved_state == MPCG_STATE_RESET) && |
| 1397 | (grp->port_persist == 0))) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1398 | fsm_deltimer(&priv->restart_timer); |
| 1399 | |
| 1400 | wch = priv->channel[WRITE]; |
| 1401 | rch = priv->channel[READ]; |
| 1402 | |
| 1403 | switch (grp->saved_state) { |
| 1404 | case MPCG_STATE_RESET: |
| 1405 | case MPCG_STATE_INOP: |
| 1406 | case MPCG_STATE_XID2INITW: |
| 1407 | case MPCG_STATE_XID0IOWAIT: |
| 1408 | case MPCG_STATE_XID2INITX: |
| 1409 | case MPCG_STATE_XID7INITW: |
| 1410 | case MPCG_STATE_XID7INITX: |
| 1411 | case MPCG_STATE_XID0IOWAIX: |
| 1412 | case MPCG_STATE_XID7INITI: |
| 1413 | case MPCG_STATE_XID7INITZ: |
| 1414 | case MPCG_STATE_XID7INITF: |
| 1415 | break; |
| 1416 | case MPCG_STATE_FLOWC: |
| 1417 | case MPCG_STATE_READY: |
| 1418 | default: |
| 1419 | tasklet_hi_schedule(&wch->ch_disc_tasklet); |
| 1420 | } |
| 1421 | |
| 1422 | grp->xid2_tgnum = 0; |
| 1423 | grp->group_max_buflen = 0; /*min of all received */ |
| 1424 | grp->outstanding_xid2 = 0; |
| 1425 | grp->outstanding_xid7 = 0; |
| 1426 | grp->outstanding_xid7_p2 = 0; |
| 1427 | grp->saved_xid2 = NULL; |
| 1428 | grp->xidnogood = 0; |
| 1429 | grp->changed_side = 0; |
| 1430 | |
| 1431 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; |
| 1432 | skb_reset_tail_pointer(grp->rcvd_xid_skb); |
| 1433 | grp->rcvd_xid_skb->len = 0; |
| 1434 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; |
| 1435 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm, |
| 1436 | TH_HEADER_LENGTH); |
| 1437 | |
| 1438 | if (grp->send_qllc_disc == 1) { |
| 1439 | grp->send_qllc_disc = 0; |
| 1440 | rc = mpc_send_qllc_discontact(dev); |
| 1441 | } |
| 1442 | |
| 1443 | /* DO NOT issue DEV_EVENT_STOP directly out of this code */ |
| 1444 | /* This can result in INOP of VTAM PU due to halting of */ |
| 1445 | /* outstanding IO which causes a sense to be returned */ |
| 1446 | /* Only about 3 senses are allowed and then IOS/VTAM will*/ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1447 | /* become unreachable without manual intervention */ |
| 1448 | if ((grp->port_persist == 1) || (grp->alloc_called)) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1449 | grp->alloc_called = 0; |
| 1450 | fsm_deltimer(&priv->restart_timer); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1451 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1452 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
| 1453 | if (grp->saved_state > MPCG_STATE_XID7INITF) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1454 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
| 1455 | "%s(%s): MPC GROUP RECOVERY SCHEDULED", |
| 1456 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1457 | } else { |
| 1458 | fsm_deltimer(&priv->restart_timer); |
| 1459 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev); |
| 1460 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1461 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
| 1462 | "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED", |
| 1463 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1464 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1465 | } |
| 1466 | |
| 1467 | /** |
| 1468 | * Handle mpc group action timeout. |
| 1469 | * MPC Group Station FSM action |
| 1470 | * CTCM_PROTO_MPC only |
| 1471 | * |
| 1472 | * fi An instance of an mpc_group fsm. |
| 1473 | * event The event, just happened. |
| 1474 | * arg Generic pointer, casted from net_device * upon call. |
| 1475 | */ |
| 1476 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg) |
| 1477 | { |
| 1478 | struct net_device *dev = arg; |
| 1479 | struct ctcm_priv *priv; |
| 1480 | struct mpc_group *grp; |
| 1481 | struct channel *wch; |
| 1482 | struct channel *rch; |
| 1483 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1484 | BUG_ON(dev == NULL); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1485 | |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1486 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1487 | grp = priv->mpcg; |
| 1488 | wch = priv->channel[WRITE]; |
| 1489 | rch = priv->channel[READ]; |
| 1490 | |
| 1491 | switch (fsm_getstate(grp->fsm)) { |
| 1492 | case MPCG_STATE_XID2INITW: |
| 1493 | /* Unless there is outstanding IO on the */ |
| 1494 | /* channel just return and wait for ATTN */ |
| 1495 | /* interrupt to begin XID negotiations */ |
| 1496 | if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) && |
| 1497 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) |
| 1498 | break; |
| 1499 | default: |
| 1500 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1501 | } |
| 1502 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1503 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 1504 | "%s: dev=%s exit", |
| 1505 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1506 | return; |
| 1507 | } |
| 1508 | |
| 1509 | /* |
| 1510 | * MPC Group Station FSM action |
| 1511 | * CTCM_PROTO_MPC only |
| 1512 | */ |
| 1513 | void mpc_action_discontact(fsm_instance *fi, int event, void *arg) |
| 1514 | { |
| 1515 | struct mpcg_info *mpcginfo = arg; |
| 1516 | struct channel *ch = mpcginfo->ch; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1517 | struct net_device *dev; |
| 1518 | struct ctcm_priv *priv; |
| 1519 | struct mpc_group *grp; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1520 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1521 | if (ch) { |
| 1522 | dev = ch->netdev; |
| 1523 | if (dev) { |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1524 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1525 | if (priv) { |
| 1526 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1527 | "%s: %s: %s\n", |
| 1528 | CTCM_FUNTAIL, dev->name, ch->id); |
| 1529 | grp = priv->mpcg; |
| 1530 | grp->send_qllc_disc = 1; |
| 1531 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1532 | } |
| 1533 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1534 | } |
| 1535 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1536 | return; |
| 1537 | } |
| 1538 | |
| 1539 | /* |
| 1540 | * MPC Group Station - not part of FSM |
| 1541 | * CTCM_PROTO_MPC only |
| 1542 | * called from add_channel in ctcm_main.c |
| 1543 | */ |
| 1544 | void mpc_action_send_discontact(unsigned long thischan) |
| 1545 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1546 | int rc; |
| 1547 | struct channel *ch = (struct channel *)thischan; |
| 1548 | unsigned long saveflags = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1549 | |
| 1550 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1551 | rc = ccw_device_start(ch->cdev, &ch->ccw[15], |
| 1552 | (unsigned long)ch, 0xff, 0); |
| 1553 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 1554 | |
| 1555 | if (rc != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1556 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1557 | } |
| 1558 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1559 | return; |
| 1560 | } |
| 1561 | |
| 1562 | |
| 1563 | /* |
| 1564 | * helper function of mpc FSM |
| 1565 | * CTCM_PROTO_MPC only |
| 1566 | * mpc_action_rcvd_xid7 |
| 1567 | */ |
| 1568 | static int mpc_validate_xid(struct mpcg_info *mpcginfo) |
| 1569 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1570 | struct channel *ch = mpcginfo->ch; |
| 1571 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1572 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1573 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1574 | struct xid2 *xid = mpcginfo->xid; |
| 1575 | int rc = 0; |
| 1576 | __u64 our_id = 0; |
| 1577 | __u64 their_id = 0; |
| 1578 | int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1579 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1580 | CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1581 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1582 | if (xid == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1583 | rc = 1; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1584 | /* XID REJECTED: xid == NULL */ |
| 1585 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1586 | "%s(%s): xid = NULL", |
| 1587 | CTCM_FUNTAIL, ch->id); |
| 1588 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1589 | } |
| 1590 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1591 | CTCM_D3_DUMP((char *)xid, XID2_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1592 | |
| 1593 | /*the received direction should be the opposite of ours */ |
| 1594 | if (((CHANNEL_DIRECTION(ch->flags) == READ) ? XID2_WRITE_SIDE : |
| 1595 | XID2_READ_SIDE) != xid->xid2_dlc_type) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1596 | rc = 2; |
| 1597 | /* XID REJECTED: r/w channel pairing mismatch */ |
| 1598 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1599 | "%s(%s): r/w channel pairing mismatch", |
| 1600 | CTCM_FUNTAIL, ch->id); |
| 1601 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1602 | } |
| 1603 | |
| 1604 | if (xid->xid2_dlc_type == XID2_READ_SIDE) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1605 | CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__, |
| 1606 | grp->group_max_buflen, xid->xid2_buf_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1607 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1608 | if (grp->group_max_buflen == 0 || grp->group_max_buflen > |
| 1609 | xid->xid2_buf_len - len) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1610 | grp->group_max_buflen = xid->xid2_buf_len - len; |
| 1611 | } |
| 1612 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1613 | if (grp->saved_xid2 == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1614 | grp->saved_xid2 = |
| 1615 | (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb); |
| 1616 | |
| 1617 | memcpy(skb_put(grp->rcvd_xid_skb, |
| 1618 | XID2_LENGTH), xid, XID2_LENGTH); |
| 1619 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; |
| 1620 | |
| 1621 | skb_reset_tail_pointer(grp->rcvd_xid_skb); |
| 1622 | grp->rcvd_xid_skb->len = 0; |
| 1623 | |
| 1624 | /* convert two 32 bit numbers into 1 64 bit for id compare */ |
| 1625 | our_id = (__u64)priv->xid->xid2_adj_id; |
| 1626 | our_id = our_id << 32; |
| 1627 | our_id = our_id + priv->xid->xid2_sender_id; |
| 1628 | their_id = (__u64)xid->xid2_adj_id; |
| 1629 | their_id = their_id << 32; |
| 1630 | their_id = their_id + xid->xid2_sender_id; |
| 1631 | /* lower id assume the xside role */ |
| 1632 | if (our_id < their_id) { |
| 1633 | grp->roll = XSIDE; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1634 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1635 | "%s(%s): WE HAVE LOW ID - TAKE XSIDE", |
| 1636 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1637 | } else { |
| 1638 | grp->roll = YSIDE; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1639 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1640 | "%s(%s): WE HAVE HIGH ID - TAKE YSIDE", |
| 1641 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1642 | } |
| 1643 | |
| 1644 | } else { |
| 1645 | if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1646 | rc = 3; |
| 1647 | /* XID REJECTED: xid flag byte4 mismatch */ |
| 1648 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1649 | "%s(%s): xid flag byte4 mismatch", |
| 1650 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1651 | } |
| 1652 | if (xid->xid2_flag2 == 0x40) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1653 | rc = 4; |
| 1654 | /* XID REJECTED - xid NOGOOD */ |
| 1655 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1656 | "%s(%s): xid NOGOOD", |
| 1657 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1658 | } |
| 1659 | if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1660 | rc = 5; |
| 1661 | /* XID REJECTED - Adjacent Station ID Mismatch */ |
| 1662 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1663 | "%s(%s): Adjacent Station ID Mismatch", |
| 1664 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1665 | } |
| 1666 | if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1667 | rc = 6; |
| 1668 | /* XID REJECTED - Sender Address Mismatch */ |
| 1669 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1670 | "%s(%s): Sender Address Mismatch", |
| 1671 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1672 | } |
| 1673 | } |
| 1674 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1675 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1676 | if (rc) { |
| 1677 | ctcm_pr_info("ctcmpc : %s() failed\n", __FUNCTION__); |
| 1678 | priv->xid->xid2_flag2 = 0x40; |
| 1679 | grp->saved_xid2->xid2_flag2 = 0x40; |
| 1680 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1681 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1682 | return rc; |
| 1683 | } |
| 1684 | |
| 1685 | /* |
| 1686 | * MPC Group Station FSM action |
| 1687 | * CTCM_PROTO_MPC only |
| 1688 | */ |
| 1689 | static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side) |
| 1690 | { |
| 1691 | struct channel *ch = arg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1692 | int rc = 0; |
| 1693 | int gotlock = 0; |
| 1694 | unsigned long saveflags = 0; /* avoids compiler warning with |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1695 | spin_unlock_irqrestore */ |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1696 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1697 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 1698 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1699 | |
| 1700 | if (ctcm_checkalloc_buffer(ch)) |
| 1701 | goto done; |
| 1702 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1703 | /* |
| 1704 | * skb data-buffer referencing: |
| 1705 | */ |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1706 | ch->trans_skb->data = ch->trans_skb_data; |
| 1707 | skb_reset_tail_pointer(ch->trans_skb); |
| 1708 | ch->trans_skb->len = 0; |
| 1709 | /* result of the previous 3 statements is NOT always |
| 1710 | * already set after ctcm_checkalloc_buffer |
| 1711 | * because of possible reuse of the trans_skb |
| 1712 | */ |
| 1713 | memset(ch->trans_skb->data, 0, 16); |
| 1714 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; |
| 1715 | /* check is main purpose here: */ |
| 1716 | skb_put(ch->trans_skb, TH_HEADER_LENGTH); |
| 1717 | ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb); |
| 1718 | /* check is main purpose here: */ |
| 1719 | skb_put(ch->trans_skb, XID2_LENGTH); |
| 1720 | ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb); |
| 1721 | /* cleanup back to startpoint */ |
| 1722 | ch->trans_skb->data = ch->trans_skb_data; |
| 1723 | skb_reset_tail_pointer(ch->trans_skb); |
| 1724 | ch->trans_skb->len = 0; |
| 1725 | |
| 1726 | /* non-checking rewrite of above skb data-buffer referencing: */ |
| 1727 | /* |
| 1728 | memset(ch->trans_skb->data, 0, 16); |
| 1729 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; |
| 1730 | ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH); |
| 1731 | ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH; |
| 1732 | */ |
| 1733 | |
| 1734 | ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1735 | ch->ccw[8].count = 0; |
| 1736 | ch->ccw[8].cda = 0x00; |
| 1737 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1738 | if (!(ch->xid_th && ch->xid && ch->xid_id)) |
| 1739 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, |
| 1740 | "%s(%s): xid_th=%p, xid=%p, xid_id=%p", |
| 1741 | CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id); |
| 1742 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1743 | if (side == XSIDE) { |
| 1744 | /* mpc_action_xside_xid */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1745 | if (ch->xid_th == NULL) |
| 1746 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1747 | ch->ccw[9].cmd_code = CCW_CMD_WRITE; |
| 1748 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1749 | ch->ccw[9].count = TH_HEADER_LENGTH; |
| 1750 | ch->ccw[9].cda = virt_to_phys(ch->xid_th); |
| 1751 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1752 | if (ch->xid == NULL) |
| 1753 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1754 | ch->ccw[10].cmd_code = CCW_CMD_WRITE; |
| 1755 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1756 | ch->ccw[10].count = XID2_LENGTH; |
| 1757 | ch->ccw[10].cda = virt_to_phys(ch->xid); |
| 1758 | |
| 1759 | ch->ccw[11].cmd_code = CCW_CMD_READ; |
| 1760 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1761 | ch->ccw[11].count = TH_HEADER_LENGTH; |
| 1762 | ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th); |
| 1763 | |
| 1764 | ch->ccw[12].cmd_code = CCW_CMD_READ; |
| 1765 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1766 | ch->ccw[12].count = XID2_LENGTH; |
| 1767 | ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid); |
| 1768 | |
| 1769 | ch->ccw[13].cmd_code = CCW_CMD_READ; |
| 1770 | ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id); |
| 1771 | |
| 1772 | } else { /* side == YSIDE : mpc_action_yside_xid */ |
| 1773 | ch->ccw[9].cmd_code = CCW_CMD_READ; |
| 1774 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1775 | ch->ccw[9].count = TH_HEADER_LENGTH; |
| 1776 | ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th); |
| 1777 | |
| 1778 | ch->ccw[10].cmd_code = CCW_CMD_READ; |
| 1779 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1780 | ch->ccw[10].count = XID2_LENGTH; |
| 1781 | ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid); |
| 1782 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1783 | if (ch->xid_th == NULL) |
| 1784 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1785 | ch->ccw[11].cmd_code = CCW_CMD_WRITE; |
| 1786 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1787 | ch->ccw[11].count = TH_HEADER_LENGTH; |
| 1788 | ch->ccw[11].cda = virt_to_phys(ch->xid_th); |
| 1789 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1790 | if (ch->xid == NULL) |
| 1791 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1792 | ch->ccw[12].cmd_code = CCW_CMD_WRITE; |
| 1793 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1794 | ch->ccw[12].count = XID2_LENGTH; |
| 1795 | ch->ccw[12].cda = virt_to_phys(ch->xid); |
| 1796 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1797 | if (ch->xid_id == NULL) |
| 1798 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1799 | ch->ccw[13].cmd_code = CCW_CMD_WRITE; |
| 1800 | ch->ccw[13].cda = virt_to_phys(ch->xid_id); |
| 1801 | |
| 1802 | } |
| 1803 | ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1804 | ch->ccw[13].count = 4; |
| 1805 | |
| 1806 | ch->ccw[14].cmd_code = CCW_CMD_NOOP; |
| 1807 | ch->ccw[14].flags = CCW_FLAG_SLI; |
| 1808 | ch->ccw[14].count = 0; |
| 1809 | ch->ccw[14].cda = 0; |
| 1810 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1811 | CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7); |
| 1812 | CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH); |
| 1813 | CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH); |
| 1814 | CTCM_D3_DUMP((char *)ch->xid_id, 4); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1815 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1816 | if (!in_irq()) { |
| 1817 | /* Such conditional locking is a known problem for |
| 1818 | * sparse because its static undeterministic. |
| 1819 | * Warnings should be ignored here. */ |
| 1820 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1821 | gotlock = 1; |
| 1822 | } |
| 1823 | |
| 1824 | fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch); |
| 1825 | rc = ccw_device_start(ch->cdev, &ch->ccw[8], |
| 1826 | (unsigned long)ch, 0xff, 0); |
| 1827 | |
| 1828 | if (gotlock) /* see remark above about conditional locking */ |
| 1829 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 1830 | |
| 1831 | if (rc != 0) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1832 | ctcm_ccw_check_rc(ch, rc, |
| 1833 | (side == XSIDE) ? "x-side XID" : "y-side XID"); |
| 1834 | } |
| 1835 | |
| 1836 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1837 | CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n", |
| 1838 | __func__, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1839 | return; |
| 1840 | |
| 1841 | } |
| 1842 | |
| 1843 | /* |
| 1844 | * MPC Group Station FSM action |
| 1845 | * CTCM_PROTO_MPC only |
| 1846 | */ |
| 1847 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg) |
| 1848 | { |
| 1849 | mpc_action_side_xid(fsm, arg, XSIDE); |
| 1850 | } |
| 1851 | |
| 1852 | /* |
| 1853 | * MPC Group Station FSM action |
| 1854 | * CTCM_PROTO_MPC only |
| 1855 | */ |
| 1856 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg) |
| 1857 | { |
| 1858 | mpc_action_side_xid(fsm, arg, YSIDE); |
| 1859 | } |
| 1860 | |
| 1861 | /* |
| 1862 | * MPC Group Station FSM action |
| 1863 | * CTCM_PROTO_MPC only |
| 1864 | */ |
| 1865 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg) |
| 1866 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1867 | struct channel *ch = arg; |
| 1868 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1869 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1870 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1871 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1872 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 1873 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1874 | |
| 1875 | if (ch->xid == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1876 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1877 | "%s(%s): ch->xid == NULL", |
| 1878 | CTCM_FUNTAIL, dev->name); |
| 1879 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1880 | } |
| 1881 | |
| 1882 | fsm_newstate(ch->fsm, CH_XID0_INPROGRESS); |
| 1883 | |
| 1884 | ch->xid->xid2_option = XID2_0; |
| 1885 | |
| 1886 | switch (fsm_getstate(grp->fsm)) { |
| 1887 | case MPCG_STATE_XID2INITW: |
| 1888 | case MPCG_STATE_XID2INITX: |
| 1889 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1890 | break; |
| 1891 | case MPCG_STATE_XID0IOWAIT: |
| 1892 | case MPCG_STATE_XID0IOWAIX: |
| 1893 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1894 | break; |
| 1895 | } |
| 1896 | |
| 1897 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); |
| 1898 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1899 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1900 | } |
| 1901 | |
| 1902 | /* |
| 1903 | * MPC Group Station FSM action |
| 1904 | * CTCM_PROTO_MPC only |
| 1905 | */ |
| 1906 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg) |
| 1907 | { |
| 1908 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1909 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1910 | struct mpc_group *grp = NULL; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1911 | int direction; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1912 | int send = 0; |
| 1913 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1914 | if (priv) |
| 1915 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1916 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1917 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1918 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1919 | } |
| 1920 | |
| 1921 | for (direction = READ; direction <= WRITE; direction++) { |
| 1922 | struct channel *ch = priv->channel[direction]; |
| 1923 | struct xid2 *thisxid = ch->xid; |
| 1924 | ch->xid_skb->data = ch->xid_skb_data; |
| 1925 | skb_reset_tail_pointer(ch->xid_skb); |
| 1926 | ch->xid_skb->len = 0; |
| 1927 | thisxid->xid2_option = XID2_7; |
| 1928 | send = 0; |
| 1929 | |
| 1930 | /* xid7 phase 1 */ |
| 1931 | if (grp->outstanding_xid7_p2 > 0) { |
| 1932 | if (grp->roll == YSIDE) { |
| 1933 | if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) { |
| 1934 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); |
| 1935 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1936 | memcpy(skb_put(ch->xid_skb, |
| 1937 | TH_HEADER_LENGTH), |
| 1938 | &thdummy, TH_HEADER_LENGTH); |
| 1939 | send = 1; |
| 1940 | } |
| 1941 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) { |
| 1942 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); |
| 1943 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1944 | memcpy(skb_put(ch->xid_skb, |
| 1945 | TH_HEADER_LENGTH), |
| 1946 | &thnorm, TH_HEADER_LENGTH); |
| 1947 | send = 1; |
| 1948 | } |
| 1949 | } else { |
| 1950 | /* xid7 phase 2 */ |
| 1951 | if (grp->roll == YSIDE) { |
| 1952 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) { |
| 1953 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); |
| 1954 | memcpy(skb_put(ch->xid_skb, |
| 1955 | TH_HEADER_LENGTH), |
| 1956 | &thnorm, TH_HEADER_LENGTH); |
| 1957 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1958 | send = 1; |
| 1959 | } |
| 1960 | } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) { |
| 1961 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); |
| 1962 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1963 | memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH), |
| 1964 | &thdummy, TH_HEADER_LENGTH); |
| 1965 | send = 1; |
| 1966 | } |
| 1967 | } |
| 1968 | |
| 1969 | if (send) |
| 1970 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); |
| 1971 | } |
| 1972 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1973 | return; |
| 1974 | } |
| 1975 | |
| 1976 | /* |
| 1977 | * MPC Group Station FSM action |
| 1978 | * CTCM_PROTO_MPC only |
| 1979 | */ |
| 1980 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) |
| 1981 | { |
| 1982 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1983 | struct mpcg_info *mpcginfo = arg; |
| 1984 | struct channel *ch = mpcginfo->ch; |
| 1985 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 1986 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1987 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1988 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1989 | CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n", |
| 1990 | __func__, ch->id, grp->outstanding_xid2, |
| 1991 | grp->outstanding_xid7, grp->outstanding_xid7_p2); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1992 | |
| 1993 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING) |
| 1994 | fsm_newstate(ch->fsm, CH_XID7_PENDING); |
| 1995 | |
| 1996 | grp->outstanding_xid2--; |
| 1997 | grp->outstanding_xid7++; |
| 1998 | grp->outstanding_xid7_p2++; |
| 1999 | |
| 2000 | /* must change state before validating xid to */ |
| 2001 | /* properly handle interim interrupts received*/ |
| 2002 | switch (fsm_getstate(grp->fsm)) { |
| 2003 | case MPCG_STATE_XID2INITW: |
| 2004 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX); |
| 2005 | mpc_validate_xid(mpcginfo); |
| 2006 | break; |
| 2007 | case MPCG_STATE_XID0IOWAIT: |
| 2008 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX); |
| 2009 | mpc_validate_xid(mpcginfo); |
| 2010 | break; |
| 2011 | case MPCG_STATE_XID2INITX: |
| 2012 | if (grp->outstanding_xid2 == 0) { |
| 2013 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW); |
| 2014 | mpc_validate_xid(mpcginfo); |
| 2015 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); |
| 2016 | } |
| 2017 | break; |
| 2018 | case MPCG_STATE_XID0IOWAIX: |
| 2019 | if (grp->outstanding_xid2 == 0) { |
| 2020 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI); |
| 2021 | mpc_validate_xid(mpcginfo); |
| 2022 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); |
| 2023 | } |
| 2024 | break; |
| 2025 | } |
| 2026 | kfree(mpcginfo); |
| 2027 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2028 | CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n", |
| 2029 | __func__, ch->id, grp->outstanding_xid2, |
| 2030 | grp->outstanding_xid7, grp->outstanding_xid7_p2); |
| 2031 | CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n", |
| 2032 | __func__, ch->id, |
| 2033 | fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2034 | return; |
| 2035 | |
| 2036 | } |
| 2037 | |
| 2038 | |
| 2039 | /* |
| 2040 | * MPC Group Station FSM action |
| 2041 | * CTCM_PROTO_MPC only |
| 2042 | */ |
| 2043 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) |
| 2044 | { |
| 2045 | struct mpcg_info *mpcginfo = arg; |
| 2046 | struct channel *ch = mpcginfo->ch; |
| 2047 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 2048 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2049 | struct mpc_group *grp = priv->mpcg; |
| 2050 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2051 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 2052 | __func__, smp_processor_id(), ch, ch->id); |
| 2053 | CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n", |
| 2054 | __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2055 | |
| 2056 | grp->outstanding_xid7--; |
| 2057 | ch->xid_skb->data = ch->xid_skb_data; |
| 2058 | skb_reset_tail_pointer(ch->xid_skb); |
| 2059 | ch->xid_skb->len = 0; |
| 2060 | |
| 2061 | switch (fsm_getstate(grp->fsm)) { |
| 2062 | case MPCG_STATE_XID7INITI: |
| 2063 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ); |
| 2064 | mpc_validate_xid(mpcginfo); |
| 2065 | break; |
| 2066 | case MPCG_STATE_XID7INITW: |
| 2067 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX); |
| 2068 | mpc_validate_xid(mpcginfo); |
| 2069 | break; |
| 2070 | case MPCG_STATE_XID7INITZ: |
| 2071 | case MPCG_STATE_XID7INITX: |
| 2072 | if (grp->outstanding_xid7 == 0) { |
| 2073 | if (grp->outstanding_xid7_p2 > 0) { |
| 2074 | grp->outstanding_xid7 = |
| 2075 | grp->outstanding_xid7_p2; |
| 2076 | grp->outstanding_xid7_p2 = 0; |
| 2077 | } else |
| 2078 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF); |
| 2079 | |
| 2080 | mpc_validate_xid(mpcginfo); |
| 2081 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); |
| 2082 | break; |
| 2083 | } |
| 2084 | mpc_validate_xid(mpcginfo); |
| 2085 | break; |
| 2086 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2087 | kfree(mpcginfo); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2088 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2089 | } |
| 2090 | |
| 2091 | /* |
| 2092 | * mpc_action helper of an MPC Group Station FSM action |
| 2093 | * CTCM_PROTO_MPC only |
| 2094 | */ |
| 2095 | static int mpc_send_qllc_discontact(struct net_device *dev) |
| 2096 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2097 | __u32 new_len = 0; |
| 2098 | struct sk_buff *skb; |
| 2099 | struct qllc *qllcptr; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame^] | 2100 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2101 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2102 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2103 | CTCM_PR_DEBUG("%s: GROUP STATE: %s\n", |
| 2104 | __func__, mpcg_state_names[grp->saved_state]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2105 | |
| 2106 | switch (grp->saved_state) { |
| 2107 | /* |
| 2108 | * establish conn callback function is |
| 2109 | * preferred method to report failure |
| 2110 | */ |
| 2111 | case MPCG_STATE_XID0IOWAIT: |
| 2112 | case MPCG_STATE_XID0IOWAIX: |
| 2113 | case MPCG_STATE_XID7INITI: |
| 2114 | case MPCG_STATE_XID7INITZ: |
| 2115 | case MPCG_STATE_XID2INITW: |
| 2116 | case MPCG_STATE_XID2INITX: |
| 2117 | case MPCG_STATE_XID7INITW: |
| 2118 | case MPCG_STATE_XID7INITX: |
| 2119 | if (grp->estconnfunc) { |
| 2120 | grp->estconnfunc(grp->port_num, -1, 0); |
| 2121 | grp->estconnfunc = NULL; |
| 2122 | break; |
| 2123 | } |
| 2124 | case MPCG_STATE_FLOWC: |
| 2125 | case MPCG_STATE_READY: |
| 2126 | grp->send_qllc_disc = 2; |
| 2127 | new_len = sizeof(struct qllc); |
| 2128 | qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA); |
| 2129 | if (qllcptr == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2130 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2131 | "%s(%s): qllcptr allocation error", |
| 2132 | CTCM_FUNTAIL, dev->name); |
| 2133 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2134 | } |
| 2135 | |
| 2136 | qllcptr->qllc_address = 0xcc; |
| 2137 | qllcptr->qllc_commands = 0x03; |
| 2138 | |
| 2139 | skb = __dev_alloc_skb(new_len, GFP_ATOMIC); |
| 2140 | |
| 2141 | if (skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2142 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2143 | "%s(%s): skb allocation error", |
| 2144 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2145 | priv->stats.rx_dropped++; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2146 | kfree(qllcptr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2147 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2148 | } |
| 2149 | |
| 2150 | memcpy(skb_put(skb, new_len), qllcptr, new_len); |
| 2151 | kfree(qllcptr); |
| 2152 | |
| 2153 | if (skb_headroom(skb) < 4) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2154 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2155 | "%s(%s): skb_headroom error", |
| 2156 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2157 | dev_kfree_skb_any(skb); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2158 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2159 | } |
| 2160 | |
| 2161 | *((__u32 *)skb_push(skb, 4)) = priv->channel[READ]->pdu_seq; |
| 2162 | priv->channel[READ]->pdu_seq++; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2163 | CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n", |
| 2164 | __func__, priv->channel[READ]->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2165 | |
| 2166 | /* receipt of CC03 resets anticipated sequence number on |
| 2167 | receiving side */ |
| 2168 | priv->channel[READ]->pdu_seq = 0x00; |
| 2169 | skb_reset_mac_header(skb); |
| 2170 | skb->dev = dev; |
| 2171 | skb->protocol = htons(ETH_P_SNAP); |
| 2172 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2173 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2174 | CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2175 | |
| 2176 | netif_rx(skb); |
| 2177 | break; |
| 2178 | default: |
| 2179 | break; |
| 2180 | |
| 2181 | } |
| 2182 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2183 | return 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2184 | } |
| 2185 | /* --- This is the END my friend --- */ |
| 2186 | |