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 | |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame^] | 22 | #define KMSG_COMPONENT "ctcm" |
| 23 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 24 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/errno.h> |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/interrupt.h> |
| 32 | #include <linux/timer.h> |
| 33 | #include <linux/sched.h> |
| 34 | |
| 35 | #include <linux/signal.h> |
| 36 | #include <linux/string.h> |
| 37 | #include <linux/proc_fs.h> |
| 38 | |
| 39 | #include <linux/ip.h> |
| 40 | #include <linux/if_arp.h> |
| 41 | #include <linux/tcp.h> |
| 42 | #include <linux/skbuff.h> |
| 43 | #include <linux/ctype.h> |
| 44 | #include <linux/netdevice.h> |
| 45 | #include <net/dst.h> |
| 46 | |
| 47 | #include <linux/io.h> /* instead of <asm/io.h> ok ? */ |
| 48 | #include <asm/ccwdev.h> |
| 49 | #include <asm/ccwgroup.h> |
| 50 | #include <linux/bitops.h> /* instead of <asm/bitops.h> ok ? */ |
| 51 | #include <linux/uaccess.h> /* instead of <asm/uaccess.h> ok ? */ |
| 52 | #include <linux/wait.h> |
| 53 | #include <linux/moduleparam.h> |
| 54 | #include <asm/idals.h> |
| 55 | |
| 56 | #include "cu3088.h" |
| 57 | #include "ctcm_mpc.h" |
| 58 | #include "ctcm_main.h" |
| 59 | #include "ctcm_fsms.h" |
| 60 | |
| 61 | static const struct xid2 init_xid = { |
| 62 | .xid2_type_id = XID_FM2, |
| 63 | .xid2_len = 0x45, |
| 64 | .xid2_adj_id = 0, |
| 65 | .xid2_rlen = 0x31, |
| 66 | .xid2_resv1 = 0, |
| 67 | .xid2_flag1 = 0, |
| 68 | .xid2_fmtt = 0, |
| 69 | .xid2_flag4 = 0x80, |
| 70 | .xid2_resv2 = 0, |
| 71 | .xid2_tgnum = 0, |
| 72 | .xid2_sender_id = 0, |
| 73 | .xid2_flag2 = 0, |
| 74 | .xid2_option = XID2_0, |
| 75 | .xid2_resv3 = "\x00", |
| 76 | .xid2_resv4 = 0, |
| 77 | .xid2_dlc_type = XID2_READ_SIDE, |
| 78 | .xid2_resv5 = 0, |
| 79 | .xid2_mpc_flag = 0, |
| 80 | .xid2_resv6 = 0, |
| 81 | .xid2_buf_len = (MPC_BUFSIZE_DEFAULT - 35), |
| 82 | }; |
| 83 | |
| 84 | static const struct th_header thnorm = { |
| 85 | .th_seg = 0x00, |
| 86 | .th_ch_flag = TH_IS_XID, |
| 87 | .th_blk_flag = TH_DATA_IS_XID, |
| 88 | .th_is_xid = 0x01, |
| 89 | .th_seq_num = 0x00000000, |
| 90 | }; |
| 91 | |
| 92 | static const struct th_header thdummy = { |
| 93 | .th_seg = 0x00, |
| 94 | .th_ch_flag = 0x00, |
| 95 | .th_blk_flag = TH_DATA_IS_XID, |
| 96 | .th_is_xid = 0x01, |
| 97 | .th_seq_num = 0x00000000, |
| 98 | }; |
| 99 | |
| 100 | /* |
| 101 | * Definition of one MPC group |
| 102 | */ |
| 103 | |
| 104 | /* |
| 105 | * Compatibility macros for busy handling |
| 106 | * of network devices. |
| 107 | */ |
| 108 | |
| 109 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb); |
| 110 | |
| 111 | /* |
| 112 | * MPC Group state machine actions (static prototypes) |
| 113 | */ |
| 114 | static void mpc_action_nop(fsm_instance *fsm, int event, void *arg); |
| 115 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg); |
| 116 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg); |
| 117 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg); |
| 118 | static int mpc_validate_xid(struct mpcg_info *mpcginfo); |
| 119 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg); |
| 120 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg); |
| 121 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg); |
| 122 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg); |
| 123 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg); |
| 124 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg); |
| 125 | |
| 126 | #ifdef DEBUGDATA |
| 127 | /*-------------------------------------------------------------------* |
| 128 | * Dump buffer format * |
| 129 | * * |
| 130 | *--------------------------------------------------------------------*/ |
| 131 | void ctcmpc_dumpit(char *buf, int len) |
| 132 | { |
| 133 | __u32 ct, sw, rm, dup; |
| 134 | char *ptr, *rptr; |
| 135 | char tbuf[82], tdup[82]; |
| 136 | #if (UTS_MACHINE == s390x) |
| 137 | char addr[22]; |
| 138 | #else |
| 139 | char addr[12]; |
| 140 | #endif |
| 141 | char boff[12]; |
| 142 | char bhex[82], duphex[82]; |
| 143 | char basc[40]; |
| 144 | |
| 145 | sw = 0; |
| 146 | rptr = ptr = buf; |
| 147 | rm = 16; |
| 148 | duphex[0] = 0x00; |
| 149 | dup = 0; |
| 150 | |
| 151 | for (ct = 0; ct < len; ct++, ptr++, rptr++) { |
| 152 | if (sw == 0) { |
| 153 | #if (UTS_MACHINE == s390x) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 154 | sprintf(addr, "%16.16lx", (__u64)rptr); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 155 | #else |
| 156 | sprintf(addr, "%8.8X", (__u32)rptr); |
| 157 | #endif |
| 158 | |
| 159 | sprintf(boff, "%4.4X", (__u32)ct); |
| 160 | bhex[0] = '\0'; |
| 161 | basc[0] = '\0'; |
| 162 | } |
| 163 | if ((sw == 4) || (sw == 12)) |
| 164 | strcat(bhex, " "); |
| 165 | if (sw == 8) |
| 166 | strcat(bhex, " "); |
| 167 | |
| 168 | #if (UTS_MACHINE == s390x) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 169 | sprintf(tbuf, "%2.2lX", (__u64)*ptr); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 170 | #else |
| 171 | sprintf(tbuf, "%2.2X", (__u32)*ptr); |
| 172 | #endif |
| 173 | |
| 174 | tbuf[2] = '\0'; |
| 175 | strcat(bhex, tbuf); |
| 176 | if ((0 != isprint(*ptr)) && (*ptr >= 0x20)) |
| 177 | basc[sw] = *ptr; |
| 178 | else |
| 179 | basc[sw] = '.'; |
| 180 | |
| 181 | basc[sw+1] = '\0'; |
| 182 | sw++; |
| 183 | rm--; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 184 | if (sw != 16) |
| 185 | continue; |
| 186 | if ((strcmp(duphex, bhex)) != 0) { |
| 187 | if (dup != 0) { |
| 188 | sprintf(tdup, |
| 189 | "Duplicate as above to %s", addr); |
| 190 | ctcm_pr_debug(" --- %s ---\n", |
| 191 | tdup); |
| 192 | } |
| 193 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 194 | addr, boff, bhex, basc); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 195 | dup = 0; |
| 196 | strcpy(duphex, bhex); |
| 197 | } else |
| 198 | dup++; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 199 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 200 | sw = 0; |
| 201 | rm = 16; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 202 | } /* endfor */ |
| 203 | |
| 204 | if (sw != 0) { |
| 205 | for ( ; rm > 0; rm--, sw++) { |
| 206 | if ((sw == 4) || (sw == 12)) |
| 207 | strcat(bhex, " "); |
| 208 | if (sw == 8) |
| 209 | strcat(bhex, " "); |
| 210 | strcat(bhex, " "); |
| 211 | strcat(basc, " "); |
| 212 | } |
| 213 | if (dup != 0) { |
| 214 | sprintf(tdup, "Duplicate as above to %s", addr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 215 | ctcm_pr_debug(" --- %s ---\n", tdup); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 216 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 217 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
| 218 | addr, boff, bhex, basc); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 219 | } else { |
| 220 | if (dup >= 1) { |
| 221 | sprintf(tdup, "Duplicate as above to %s", addr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 222 | ctcm_pr_debug(" --- %s ---\n", tdup); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 223 | } |
| 224 | if (dup != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 225 | ctcm_pr_debug(" %s (+%s) : %s [%s]\n", |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 226 | addr, boff, bhex, basc); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | return; |
| 231 | |
| 232 | } /* end of ctcmpc_dumpit */ |
| 233 | #endif |
| 234 | |
| 235 | #ifdef DEBUGDATA |
| 236 | /* |
| 237 | * Dump header and first 16 bytes of an sk_buff for debugging purposes. |
| 238 | * |
| 239 | * skb The sk_buff to dump. |
| 240 | * offset Offset relative to skb-data, where to start the dump. |
| 241 | */ |
| 242 | void ctcmpc_dump_skb(struct sk_buff *skb, int offset) |
| 243 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 244 | __u8 *p = skb->data; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 245 | struct th_header *header; |
| 246 | struct pdu *pheader; |
| 247 | int bl = skb->len; |
| 248 | int i; |
| 249 | |
| 250 | if (p == NULL) |
| 251 | return; |
| 252 | |
| 253 | p += offset; |
| 254 | header = (struct th_header *)p; |
| 255 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 256 | ctcm_pr_debug("dump:\n"); |
| 257 | ctcm_pr_debug("skb len=%d \n", skb->len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 258 | if (skb->len > 2) { |
| 259 | switch (header->th_ch_flag) { |
| 260 | case TH_HAS_PDU: |
| 261 | break; |
| 262 | case 0x00: |
| 263 | case TH_IS_XID: |
| 264 | if ((header->th_blk_flag == TH_DATA_IS_XID) && |
| 265 | (header->th_is_xid == 0x01)) |
| 266 | goto dumpth; |
| 267 | case TH_SWEEP_REQ: |
| 268 | goto dumpth; |
| 269 | case TH_SWEEP_RESP: |
| 270 | goto dumpth; |
| 271 | default: |
| 272 | break; |
| 273 | } |
| 274 | |
| 275 | pheader = (struct pdu *)p; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 276 | ctcm_pr_debug("pdu->offset: %d hex: %04x\n", |
| 277 | pheader->pdu_offset, pheader->pdu_offset); |
| 278 | ctcm_pr_debug("pdu->flag : %02x\n", pheader->pdu_flag); |
| 279 | ctcm_pr_debug("pdu->proto : %02x\n", pheader->pdu_proto); |
| 280 | ctcm_pr_debug("pdu->seq : %02x\n", pheader->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 281 | goto dumpdata; |
| 282 | |
| 283 | dumpth: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 284 | ctcm_pr_debug("th->seg : %02x\n", header->th_seg); |
| 285 | ctcm_pr_debug("th->ch : %02x\n", header->th_ch_flag); |
| 286 | ctcm_pr_debug("th->blk_flag: %02x\n", header->th_blk_flag); |
| 287 | ctcm_pr_debug("th->type : %s\n", |
| 288 | (header->th_is_xid) ? "DATA" : "XID"); |
| 289 | ctcm_pr_debug("th->seqnum : %04x\n", header->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 290 | |
| 291 | } |
| 292 | dumpdata: |
| 293 | if (bl > 32) |
| 294 | bl = 32; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 295 | ctcm_pr_debug("data: "); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 296 | for (i = 0; i < bl; i++) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 297 | ctcm_pr_debug("%02x%s", *p++, (i % 16) ? " " : "\n"); |
| 298 | ctcm_pr_debug("\n"); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 299 | } |
| 300 | #endif |
| 301 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 302 | static struct net_device *ctcmpc_get_dev(int port_num) |
| 303 | { |
| 304 | char device[20]; |
| 305 | struct net_device *dev; |
| 306 | struct ctcm_priv *priv; |
| 307 | |
| 308 | sprintf(device, "%s%i", MPC_DEVICE_NAME, port_num); |
| 309 | |
| 310 | dev = __dev_get_by_name(&init_net, device); |
| 311 | |
| 312 | if (dev == NULL) { |
| 313 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 314 | "%s: Device not found by name: %s", |
| 315 | CTCM_FUNTAIL, device); |
| 316 | return NULL; |
| 317 | } |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 318 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 319 | if (priv == NULL) { |
| 320 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 321 | "%s(%s): dev->ml_priv is NULL", |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 322 | CTCM_FUNTAIL, device); |
| 323 | return NULL; |
| 324 | } |
| 325 | if (priv->mpcg == NULL) { |
| 326 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 327 | "%s(%s): priv->mpcg is NULL", |
| 328 | CTCM_FUNTAIL, device); |
| 329 | return NULL; |
| 330 | } |
| 331 | return dev; |
| 332 | } |
| 333 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 334 | /* |
| 335 | * ctc_mpc_alloc_channel |
| 336 | * (exported interface) |
| 337 | * |
| 338 | * Device Initialization : |
| 339 | * ACTPATH driven IO operations |
| 340 | */ |
| 341 | int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int)) |
| 342 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 343 | struct net_device *dev; |
| 344 | struct mpc_group *grp; |
| 345 | struct ctcm_priv *priv; |
| 346 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 347 | dev = ctcmpc_get_dev(port_num); |
| 348 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 349 | return 1; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 350 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 351 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 352 | |
| 353 | grp->allochanfunc = callback; |
| 354 | grp->port_num = port_num; |
| 355 | grp->port_persist = 1; |
| 356 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 357 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 358 | "%s(%s): state=%s", |
| 359 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 360 | |
| 361 | switch (fsm_getstate(grp->fsm)) { |
| 362 | case MPCG_STATE_INOP: |
| 363 | /* Group is in the process of terminating */ |
| 364 | grp->alloc_called = 1; |
| 365 | break; |
| 366 | case MPCG_STATE_RESET: |
| 367 | /* MPC Group will transition to state */ |
| 368 | /* MPCG_STATE_XID2INITW iff the minimum number */ |
| 369 | /* of 1 read and 1 write channel have successfully*/ |
| 370 | /* activated */ |
| 371 | /*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/ |
| 372 | if (callback) |
| 373 | grp->send_qllc_disc = 1; |
| 374 | case MPCG_STATE_XID0IOWAIT: |
| 375 | fsm_deltimer(&grp->timer); |
| 376 | grp->outstanding_xid2 = 0; |
| 377 | grp->outstanding_xid7 = 0; |
| 378 | grp->outstanding_xid7_p2 = 0; |
| 379 | grp->saved_xid2 = NULL; |
| 380 | if (callback) |
| 381 | ctcm_open(dev); |
| 382 | fsm_event(priv->fsm, DEV_EVENT_START, dev); |
| 383 | break; |
| 384 | case MPCG_STATE_READY: |
| 385 | /* XID exchanges completed after PORT was activated */ |
| 386 | /* Link station already active */ |
| 387 | /* Maybe timing issue...retry callback */ |
| 388 | grp->allocchan_callback_retries++; |
| 389 | if (grp->allocchan_callback_retries < 4) { |
| 390 | if (grp->allochanfunc) |
| 391 | grp->allochanfunc(grp->port_num, |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame^] | 392 | grp->group_max_buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 393 | } else { |
| 394 | /* there are problems...bail out */ |
| 395 | /* there may be a state mismatch so restart */ |
| 396 | grp->port_persist = 1; |
| 397 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 398 | grp->allocchan_callback_retries = 0; |
| 399 | } |
| 400 | break; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 401 | } |
| 402 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 403 | return 0; |
| 404 | } |
| 405 | EXPORT_SYMBOL(ctc_mpc_alloc_channel); |
| 406 | |
| 407 | /* |
| 408 | * ctc_mpc_establish_connectivity |
| 409 | * (exported interface) |
| 410 | */ |
| 411 | void ctc_mpc_establish_connectivity(int port_num, |
| 412 | void (*callback)(int, int, int)) |
| 413 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 414 | struct net_device *dev; |
| 415 | struct mpc_group *grp; |
| 416 | struct ctcm_priv *priv; |
| 417 | struct channel *rch, *wch; |
| 418 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 419 | dev = ctcmpc_get_dev(port_num); |
| 420 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 421 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 422 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 423 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 424 | rch = priv->channel[READ]; |
| 425 | wch = priv->channel[WRITE]; |
| 426 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 427 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 428 | "%s(%s): state=%s", |
| 429 | CTCM_FUNTAIL, dev->name, fsm_getstate_str(grp->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 430 | |
| 431 | grp->estconnfunc = callback; |
| 432 | grp->port_num = port_num; |
| 433 | |
| 434 | switch (fsm_getstate(grp->fsm)) { |
| 435 | case MPCG_STATE_READY: |
| 436 | /* XID exchanges completed after PORT was activated */ |
| 437 | /* Link station already active */ |
| 438 | /* Maybe timing issue...retry callback */ |
| 439 | fsm_deltimer(&grp->timer); |
| 440 | grp->estconn_callback_retries++; |
| 441 | if (grp->estconn_callback_retries < 4) { |
| 442 | if (grp->estconnfunc) { |
| 443 | grp->estconnfunc(grp->port_num, 0, |
| 444 | grp->group_max_buflen); |
| 445 | grp->estconnfunc = NULL; |
| 446 | } |
| 447 | } else { |
| 448 | /* there are problems...bail out */ |
| 449 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 450 | grp->estconn_callback_retries = 0; |
| 451 | } |
| 452 | break; |
| 453 | case MPCG_STATE_INOP: |
| 454 | case MPCG_STATE_RESET: |
| 455 | /* MPC Group is not ready to start XID - min num of */ |
| 456 | /* 1 read and 1 write channel have not been acquired*/ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 457 | |
| 458 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 459 | "%s(%s): REJECTED - inactive channels", |
| 460 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 461 | if (grp->estconnfunc) { |
| 462 | grp->estconnfunc(grp->port_num, -1, 0); |
| 463 | grp->estconnfunc = NULL; |
| 464 | } |
| 465 | break; |
| 466 | case MPCG_STATE_XID2INITW: |
| 467 | /* alloc channel was called but no XID exchange */ |
| 468 | /* has occurred. initiate xside XID exchange */ |
| 469 | /* make sure yside XID0 processing has not started */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 470 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 471 | if ((fsm_getstate(rch->fsm) > CH_XID0_PENDING) || |
| 472 | (fsm_getstate(wch->fsm) > CH_XID0_PENDING)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 473 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 474 | "%s(%s): ABORT - PASSIVE XID", |
| 475 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 476 | break; |
| 477 | } |
| 478 | grp->send_qllc_disc = 1; |
| 479 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIT); |
| 480 | fsm_deltimer(&grp->timer); |
| 481 | fsm_addtimer(&grp->timer, MPC_XID_TIMEOUT_VALUE, |
| 482 | MPCG_EVENT_TIMER, dev); |
| 483 | grp->outstanding_xid7 = 0; |
| 484 | grp->outstanding_xid7_p2 = 0; |
| 485 | grp->saved_xid2 = NULL; |
| 486 | if ((rch->in_mpcgroup) && |
| 487 | (fsm_getstate(rch->fsm) == CH_XID0_PENDING)) |
| 488 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, rch); |
| 489 | else { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 490 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 491 | "%s(%s): RX-%s not ready for ACTIVE XID0", |
| 492 | CTCM_FUNTAIL, dev->name, rch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 493 | if (grp->estconnfunc) { |
| 494 | grp->estconnfunc(grp->port_num, -1, 0); |
| 495 | grp->estconnfunc = NULL; |
| 496 | } |
| 497 | fsm_deltimer(&grp->timer); |
| 498 | goto done; |
| 499 | } |
| 500 | if ((wch->in_mpcgroup) && |
| 501 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) |
| 502 | fsm_event(grp->fsm, MPCG_EVENT_XID0DO, wch); |
| 503 | else { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 504 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 505 | "%s(%s): WX-%s not ready for ACTIVE XID0", |
| 506 | CTCM_FUNTAIL, dev->name, wch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 507 | if (grp->estconnfunc) { |
| 508 | grp->estconnfunc(grp->port_num, -1, 0); |
| 509 | grp->estconnfunc = NULL; |
| 510 | } |
| 511 | fsm_deltimer(&grp->timer); |
| 512 | goto done; |
| 513 | } |
| 514 | break; |
| 515 | case MPCG_STATE_XID0IOWAIT: |
| 516 | /* already in active XID negotiations */ |
| 517 | default: |
| 518 | break; |
| 519 | } |
| 520 | |
| 521 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 522 | CTCM_PR_DEBUG("Exit %s()\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 523 | return; |
| 524 | } |
| 525 | EXPORT_SYMBOL(ctc_mpc_establish_connectivity); |
| 526 | |
| 527 | /* |
| 528 | * ctc_mpc_dealloc_ch |
| 529 | * (exported interface) |
| 530 | */ |
| 531 | void ctc_mpc_dealloc_ch(int port_num) |
| 532 | { |
| 533 | struct net_device *dev; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 534 | struct ctcm_priv *priv; |
| 535 | struct mpc_group *grp; |
| 536 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 537 | dev = ctcmpc_get_dev(port_num); |
| 538 | if (dev == NULL) |
| 539 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 540 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 541 | grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 542 | |
| 543 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_DEBUG, |
| 544 | "%s: %s: refcount = %d\n", |
| 545 | CTCM_FUNTAIL, dev->name, atomic_read(&dev->refcnt)); |
| 546 | |
| 547 | fsm_deltimer(&priv->restart_timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 548 | grp->channels_terminating = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 549 | fsm_deltimer(&grp->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 550 | grp->allochanfunc = NULL; |
| 551 | grp->estconnfunc = NULL; |
| 552 | grp->port_persist = 0; |
| 553 | grp->send_qllc_disc = 0; |
| 554 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 555 | |
| 556 | ctcm_close(dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 557 | return; |
| 558 | } |
| 559 | EXPORT_SYMBOL(ctc_mpc_dealloc_ch); |
| 560 | |
| 561 | /* |
| 562 | * ctc_mpc_flow_control |
| 563 | * (exported interface) |
| 564 | */ |
| 565 | void ctc_mpc_flow_control(int port_num, int flowc) |
| 566 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 567 | struct ctcm_priv *priv; |
| 568 | struct mpc_group *grp; |
| 569 | struct net_device *dev; |
| 570 | struct channel *rch; |
| 571 | int mpcg_state; |
| 572 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 573 | dev = ctcmpc_get_dev(port_num); |
| 574 | if (dev == NULL) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 575 | return; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 576 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 577 | grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 578 | |
| 579 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 580 | "%s: %s: flowc = %d", |
| 581 | CTCM_FUNTAIL, dev->name, flowc); |
| 582 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 583 | rch = priv->channel[READ]; |
| 584 | |
| 585 | mpcg_state = fsm_getstate(grp->fsm); |
| 586 | switch (flowc) { |
| 587 | case 1: |
| 588 | if (mpcg_state == MPCG_STATE_FLOWC) |
| 589 | break; |
| 590 | if (mpcg_state == MPCG_STATE_READY) { |
| 591 | if (grp->flow_off_called == 1) |
| 592 | grp->flow_off_called = 0; |
| 593 | else |
| 594 | fsm_newstate(grp->fsm, MPCG_STATE_FLOWC); |
| 595 | break; |
| 596 | } |
| 597 | break; |
| 598 | case 0: |
| 599 | if (mpcg_state == MPCG_STATE_FLOWC) { |
| 600 | fsm_newstate(grp->fsm, MPCG_STATE_READY); |
| 601 | /* ensure any data that has accumulated */ |
| 602 | /* on the io_queue will now be sen t */ |
| 603 | tasklet_schedule(&rch->ch_tasklet); |
| 604 | } |
| 605 | /* possible race condition */ |
| 606 | if (mpcg_state == MPCG_STATE_READY) { |
| 607 | grp->flow_off_called = 1; |
| 608 | break; |
| 609 | } |
| 610 | break; |
| 611 | } |
| 612 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 613 | } |
| 614 | EXPORT_SYMBOL(ctc_mpc_flow_control); |
| 615 | |
| 616 | static int mpc_send_qllc_discontact(struct net_device *); |
| 617 | |
| 618 | /* |
| 619 | * helper function of ctcmpc_unpack_skb |
| 620 | */ |
| 621 | static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) |
| 622 | { |
| 623 | struct channel *rch = mpcginfo->ch; |
| 624 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 625 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 626 | struct mpc_group *grp = priv->mpcg; |
| 627 | struct channel *ch = priv->channel[WRITE]; |
| 628 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 629 | CTCM_PR_DEBUG("%s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
| 630 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 631 | |
| 632 | grp->sweep_rsp_pend_num--; |
| 633 | |
| 634 | if ((grp->sweep_req_pend_num == 0) && |
| 635 | (grp->sweep_rsp_pend_num == 0)) { |
| 636 | fsm_deltimer(&ch->sweep_timer); |
| 637 | grp->in_sweep = 0; |
| 638 | rch->th_seq_num = 0x00; |
| 639 | ch->th_seq_num = 0x00; |
| 640 | ctcm_clear_busy_do(dev); |
| 641 | } |
| 642 | |
| 643 | kfree(mpcginfo); |
| 644 | |
| 645 | return; |
| 646 | |
| 647 | } |
| 648 | |
| 649 | /* |
| 650 | * helper function of mpc_rcvd_sweep_req |
| 651 | * which is a helper of ctcmpc_unpack_skb |
| 652 | */ |
| 653 | static void ctcmpc_send_sweep_resp(struct channel *rch) |
| 654 | { |
| 655 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 656 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 657 | struct mpc_group *grp = priv->mpcg; |
| 658 | int rc = 0; |
| 659 | struct th_sweep *header; |
| 660 | struct sk_buff *sweep_skb; |
| 661 | struct channel *ch = priv->channel[WRITE]; |
| 662 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 663 | 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] | 664 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 665 | sweep_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 666 | if (sweep_skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 667 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 668 | "%s(%s): sweep_skb allocation ERROR\n", |
| 669 | CTCM_FUNTAIL, rch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 670 | rc = -ENOMEM; |
| 671 | goto done; |
| 672 | } |
| 673 | |
| 674 | header = (struct th_sweep *) |
| 675 | kmalloc(sizeof(struct th_sweep), gfp_type()); |
| 676 | |
| 677 | if (!header) { |
| 678 | dev_kfree_skb_any(sweep_skb); |
| 679 | rc = -ENOMEM; |
| 680 | goto done; |
| 681 | } |
| 682 | |
| 683 | header->th.th_seg = 0x00 ; |
| 684 | header->th.th_ch_flag = TH_SWEEP_RESP; |
| 685 | header->th.th_blk_flag = 0x00; |
| 686 | header->th.th_is_xid = 0x00; |
| 687 | header->th.th_seq_num = 0x00; |
| 688 | header->sw.th_last_seq = ch->th_seq_num; |
| 689 | |
| 690 | memcpy(skb_put(sweep_skb, TH_SWEEP_LENGTH), header, TH_SWEEP_LENGTH); |
| 691 | |
| 692 | kfree(header); |
| 693 | |
| 694 | dev->trans_start = jiffies; |
| 695 | skb_queue_tail(&ch->sweep_queue, sweep_skb); |
| 696 | |
| 697 | fsm_addtimer(&ch->sweep_timer, 100, CTC_EVENT_RSWEEP_TIMER, ch); |
| 698 | |
| 699 | return; |
| 700 | |
| 701 | done: |
| 702 | if (rc != 0) { |
| 703 | grp->in_sweep = 0; |
| 704 | ctcm_clear_busy_do(dev); |
| 705 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 706 | } |
| 707 | |
| 708 | return; |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * helper function of ctcmpc_unpack_skb |
| 713 | */ |
| 714 | static void mpc_rcvd_sweep_req(struct mpcg_info *mpcginfo) |
| 715 | { |
| 716 | struct channel *rch = mpcginfo->ch; |
| 717 | struct net_device *dev = rch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 718 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 719 | struct mpc_group *grp = priv->mpcg; |
| 720 | struct channel *ch = priv->channel[WRITE]; |
| 721 | |
| 722 | if (do_debug) |
| 723 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 724 | " %s(): ch=0x%p id=%s\n", __func__, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 725 | |
| 726 | if (grp->in_sweep == 0) { |
| 727 | grp->in_sweep = 1; |
| 728 | ctcm_test_and_set_busy(dev); |
| 729 | grp->sweep_req_pend_num = grp->active_channels[READ]; |
| 730 | grp->sweep_rsp_pend_num = grp->active_channels[READ]; |
| 731 | } |
| 732 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 733 | CTCM_D3_DUMP((char *)mpcginfo->sweep, TH_SWEEP_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 734 | |
| 735 | grp->sweep_req_pend_num--; |
| 736 | ctcmpc_send_sweep_resp(ch); |
| 737 | kfree(mpcginfo); |
| 738 | return; |
| 739 | } |
| 740 | |
| 741 | /* |
| 742 | * MPC Group Station FSM definitions |
| 743 | */ |
| 744 | static const char *mpcg_event_names[] = { |
| 745 | [MPCG_EVENT_INOP] = "INOP Condition", |
| 746 | [MPCG_EVENT_DISCONC] = "Discontact Received", |
| 747 | [MPCG_EVENT_XID0DO] = "Channel Active - Start XID", |
| 748 | [MPCG_EVENT_XID2] = "XID2 Received", |
| 749 | [MPCG_EVENT_XID2DONE] = "XID0 Complete", |
| 750 | [MPCG_EVENT_XID7DONE] = "XID7 Complete", |
| 751 | [MPCG_EVENT_TIMER] = "XID Setup Timer", |
| 752 | [MPCG_EVENT_DOIO] = "XID DoIO", |
| 753 | }; |
| 754 | |
| 755 | static const char *mpcg_state_names[] = { |
| 756 | [MPCG_STATE_RESET] = "Reset", |
| 757 | [MPCG_STATE_INOP] = "INOP", |
| 758 | [MPCG_STATE_XID2INITW] = "Passive XID- XID0 Pending Start", |
| 759 | [MPCG_STATE_XID2INITX] = "Passive XID- XID0 Pending Complete", |
| 760 | [MPCG_STATE_XID7INITW] = "Passive XID- XID7 Pending P1 Start", |
| 761 | [MPCG_STATE_XID7INITX] = "Passive XID- XID7 Pending P2 Complete", |
| 762 | [MPCG_STATE_XID0IOWAIT] = "Active XID- XID0 Pending Start", |
| 763 | [MPCG_STATE_XID0IOWAIX] = "Active XID- XID0 Pending Complete", |
| 764 | [MPCG_STATE_XID7INITI] = "Active XID- XID7 Pending Start", |
| 765 | [MPCG_STATE_XID7INITZ] = "Active XID- XID7 Pending Complete ", |
| 766 | [MPCG_STATE_XID7INITF] = "XID - XID7 Complete ", |
| 767 | [MPCG_STATE_FLOWC] = "FLOW CONTROL ON", |
| 768 | [MPCG_STATE_READY] = "READY", |
| 769 | }; |
| 770 | |
| 771 | /* |
| 772 | * The MPC Group Station FSM |
| 773 | * 22 events |
| 774 | */ |
| 775 | static const fsm_node mpcg_fsm[] = { |
| 776 | { MPCG_STATE_RESET, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 777 | { MPCG_STATE_INOP, MPCG_EVENT_INOP, mpc_action_nop }, |
| 778 | { MPCG_STATE_FLOWC, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 779 | |
| 780 | { MPCG_STATE_READY, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 781 | { MPCG_STATE_READY, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 782 | |
| 783 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 784 | { MPCG_STATE_XID2INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 785 | { MPCG_STATE_XID2INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 786 | { MPCG_STATE_XID2INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 787 | { MPCG_STATE_XID2INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 788 | |
| 789 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 790 | { MPCG_STATE_XID2INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 791 | { MPCG_STATE_XID2INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 792 | { MPCG_STATE_XID2INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 793 | { MPCG_STATE_XID2INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 794 | |
| 795 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, |
| 796 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 797 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 798 | { MPCG_STATE_XID7INITW, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 799 | { MPCG_STATE_XID7INITW, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 800 | { MPCG_STATE_XID7INITW, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 801 | { MPCG_STATE_XID7INITW, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 802 | |
| 803 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 804 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 805 | { MPCG_STATE_XID7INITX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 806 | { MPCG_STATE_XID7INITX, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 807 | { MPCG_STATE_XID7INITX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 808 | { MPCG_STATE_XID7INITX, MPCG_EVENT_DOIO, mpc_action_yside_xid }, |
| 809 | |
| 810 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 811 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 812 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 813 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 814 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 815 | { MPCG_STATE_XID0IOWAIT, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 816 | |
| 817 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID0DO, mpc_action_doxid0 }, |
| 818 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 819 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_XID2, mpc_action_rcvd_xid0 }, |
| 820 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 821 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 822 | { MPCG_STATE_XID0IOWAIX, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 823 | |
| 824 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2DONE, mpc_action_doxid7 }, |
| 825 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 826 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 827 | { MPCG_STATE_XID7INITI, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 828 | { MPCG_STATE_XID7INITI, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 829 | { MPCG_STATE_XID7INITI, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 830 | { MPCG_STATE_XID7INITI, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 831 | |
| 832 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID2, mpc_action_rcvd_xid7 }, |
| 833 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_XID7DONE, mpc_action_doxid7 }, |
| 834 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DISCONC, mpc_action_discontact }, |
| 835 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 836 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_TIMER, mpc_action_timeout }, |
| 837 | { MPCG_STATE_XID7INITZ, MPCG_EVENT_DOIO, mpc_action_xside_xid }, |
| 838 | |
| 839 | { MPCG_STATE_XID7INITF, MPCG_EVENT_INOP, mpc_action_go_inop }, |
| 840 | { MPCG_STATE_XID7INITF, MPCG_EVENT_XID7DONE, mpc_action_go_ready }, |
| 841 | }; |
| 842 | |
| 843 | static int mpcg_fsm_len = ARRAY_SIZE(mpcg_fsm); |
| 844 | |
| 845 | /* |
| 846 | * MPC Group Station FSM action |
| 847 | * CTCM_PROTO_MPC only |
| 848 | */ |
| 849 | static void mpc_action_go_ready(fsm_instance *fsm, int event, void *arg) |
| 850 | { |
| 851 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 852 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 853 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 854 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 855 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 856 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 857 | "%s(%s): No MPC group", |
| 858 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 859 | return; |
| 860 | } |
| 861 | |
| 862 | fsm_deltimer(&grp->timer); |
| 863 | |
| 864 | if (grp->saved_xid2->xid2_flag2 == 0x40) { |
| 865 | priv->xid->xid2_flag2 = 0x00; |
| 866 | if (grp->estconnfunc) { |
| 867 | grp->estconnfunc(grp->port_num, 1, |
| 868 | grp->group_max_buflen); |
| 869 | grp->estconnfunc = NULL; |
| 870 | } else if (grp->allochanfunc) |
| 871 | grp->send_qllc_disc = 1; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 872 | |
| 873 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 874 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 875 | "%s(%s): fails", |
| 876 | CTCM_FUNTAIL, dev->name); |
| 877 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | grp->port_persist = 1; |
| 881 | grp->out_of_sequence = 0; |
| 882 | grp->estconn_called = 0; |
| 883 | |
| 884 | tasklet_hi_schedule(&grp->mpc_tasklet2); |
| 885 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 886 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /* |
| 890 | * helper of ctcm_init_netdevice |
| 891 | * CTCM_PROTO_MPC only |
| 892 | */ |
| 893 | void mpc_group_ready(unsigned long adev) |
| 894 | { |
| 895 | struct net_device *dev = (struct net_device *)adev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 896 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 897 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 898 | struct channel *ch = NULL; |
| 899 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 900 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 901 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 902 | "%s(%s): No MPC group", |
| 903 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 904 | return; |
| 905 | } |
| 906 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 907 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
| 908 | "%s: %s: GROUP TRANSITIONED TO READY, maxbuf = %d\n", |
| 909 | CTCM_FUNTAIL, dev->name, grp->group_max_buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 910 | |
| 911 | fsm_newstate(grp->fsm, MPCG_STATE_READY); |
| 912 | |
| 913 | /* Put up a read on the channel */ |
| 914 | ch = priv->channel[READ]; |
| 915 | ch->pdu_seq = 0; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 916 | CTCM_PR_DBGDATA("ctcmpc: %s() ToDCM_pdu_seq= %08x\n" , |
| 917 | __func__, ch->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 918 | |
| 919 | ctcmpc_chx_rxidle(ch->fsm, CTC_EVENT_START, ch); |
| 920 | /* Put the write channel in idle state */ |
| 921 | ch = priv->channel[WRITE]; |
| 922 | if (ch->collect_len > 0) { |
| 923 | spin_lock(&ch->collect_lock); |
| 924 | ctcm_purge_skb_queue(&ch->collect_queue); |
| 925 | ch->collect_len = 0; |
| 926 | spin_unlock(&ch->collect_lock); |
| 927 | } |
| 928 | ctcm_chx_txidle(ch->fsm, CTC_EVENT_START, ch); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 929 | ctcm_clear_busy(dev); |
| 930 | |
| 931 | if (grp->estconnfunc) { |
| 932 | grp->estconnfunc(grp->port_num, 0, |
| 933 | grp->group_max_buflen); |
| 934 | grp->estconnfunc = NULL; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 935 | } else if (grp->allochanfunc) |
| 936 | grp->allochanfunc(grp->port_num, grp->group_max_buflen); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 937 | |
| 938 | grp->send_qllc_disc = 1; |
| 939 | grp->changed_side = 0; |
| 940 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 941 | return; |
| 942 | |
| 943 | } |
| 944 | |
| 945 | /* |
| 946 | * Increment the MPC Group Active Channel Counts |
| 947 | * helper of dev_action (called from channel fsm) |
| 948 | */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 949 | void mpc_channel_action(struct channel *ch, int direction, int action) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 950 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 951 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 952 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 953 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 954 | |
| 955 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 956 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 957 | "%s(%s): No MPC group", |
| 958 | CTCM_FUNTAIL, dev->name); |
| 959 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 960 | } |
| 961 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 962 | CTCM_PR_DEBUG("enter %s: ch=0x%p id=%s\n", __func__, ch, ch->id); |
| 963 | |
| 964 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 965 | "%s: %i / Grp:%s total_channels=%i, active_channels: " |
| 966 | "read=%i, write=%i\n", __func__, action, |
| 967 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, |
| 968 | grp->active_channels[READ], grp->active_channels[WRITE]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 969 | |
| 970 | if ((action == MPC_CHANNEL_ADD) && (ch->in_mpcgroup == 0)) { |
| 971 | grp->num_channel_paths++; |
| 972 | grp->active_channels[direction]++; |
| 973 | grp->outstanding_xid2++; |
| 974 | ch->in_mpcgroup = 1; |
| 975 | |
| 976 | if (ch->xid_skb != NULL) |
| 977 | dev_kfree_skb_any(ch->xid_skb); |
| 978 | |
| 979 | ch->xid_skb = __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, |
| 980 | GFP_ATOMIC | GFP_DMA); |
| 981 | if (ch->xid_skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 982 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 983 | "%s(%s): Couldn't alloc ch xid_skb\n", |
| 984 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 985 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 986 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 987 | } |
| 988 | ch->xid_skb_data = ch->xid_skb->data; |
| 989 | ch->xid_th = (struct th_header *)ch->xid_skb->data; |
| 990 | skb_put(ch->xid_skb, TH_HEADER_LENGTH); |
| 991 | ch->xid = (struct xid2 *)skb_tail_pointer(ch->xid_skb); |
| 992 | skb_put(ch->xid_skb, XID2_LENGTH); |
| 993 | ch->xid_id = skb_tail_pointer(ch->xid_skb); |
| 994 | ch->xid_skb->data = ch->xid_skb_data; |
| 995 | skb_reset_tail_pointer(ch->xid_skb); |
| 996 | ch->xid_skb->len = 0; |
| 997 | |
| 998 | memcpy(skb_put(ch->xid_skb, grp->xid_skb->len), |
| 999 | grp->xid_skb->data, |
| 1000 | grp->xid_skb->len); |
| 1001 | |
| 1002 | ch->xid->xid2_dlc_type = ((CHANNEL_DIRECTION(ch->flags) == READ) |
| 1003 | ? XID2_READ_SIDE : XID2_WRITE_SIDE); |
| 1004 | |
| 1005 | if (CHANNEL_DIRECTION(ch->flags) == WRITE) |
| 1006 | ch->xid->xid2_buf_len = 0x00; |
| 1007 | |
| 1008 | ch->xid_skb->data = ch->xid_skb_data; |
| 1009 | skb_reset_tail_pointer(ch->xid_skb); |
| 1010 | ch->xid_skb->len = 0; |
| 1011 | |
| 1012 | fsm_newstate(ch->fsm, CH_XID0_PENDING); |
| 1013 | |
| 1014 | if ((grp->active_channels[READ] > 0) && |
| 1015 | (grp->active_channels[WRITE] > 0) && |
| 1016 | (fsm_getstate(grp->fsm) < MPCG_STATE_XID2INITW)) { |
| 1017 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1018 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_NOTICE, |
| 1019 | "%s: %s: MPC GROUP CHANNELS ACTIVE\n", |
| 1020 | __func__, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1021 | } |
| 1022 | } else if ((action == MPC_CHANNEL_REMOVE) && |
| 1023 | (ch->in_mpcgroup == 1)) { |
| 1024 | ch->in_mpcgroup = 0; |
| 1025 | grp->num_channel_paths--; |
| 1026 | grp->active_channels[direction]--; |
| 1027 | |
| 1028 | if (ch->xid_skb != NULL) |
| 1029 | dev_kfree_skb_any(ch->xid_skb); |
| 1030 | ch->xid_skb = NULL; |
| 1031 | |
| 1032 | if (grp->channels_terminating) |
| 1033 | goto done; |
| 1034 | |
| 1035 | if (((grp->active_channels[READ] == 0) && |
| 1036 | (grp->active_channels[WRITE] > 0)) |
| 1037 | || ((grp->active_channels[WRITE] == 0) && |
| 1038 | (grp->active_channels[READ] > 0))) |
| 1039 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1040 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1041 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1042 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 1043 | "exit %s: %i / Grp:%s total_channels=%i, active_channels: " |
| 1044 | "read=%i, write=%i\n", __func__, action, |
| 1045 | fsm_getstate_str(grp->fsm), grp->num_channel_paths, |
| 1046 | grp->active_channels[READ], grp->active_channels[WRITE]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1047 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1048 | 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] | 1049 | } |
| 1050 | |
| 1051 | /** |
| 1052 | * Unpack a just received skb and hand it over to |
| 1053 | * upper layers. |
| 1054 | * special MPC version of unpack_skb. |
| 1055 | * |
| 1056 | * ch The channel where this skb has been received. |
| 1057 | * pskb The received skb. |
| 1058 | */ |
| 1059 | static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) |
| 1060 | { |
| 1061 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1062 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1063 | struct mpc_group *grp = priv->mpcg; |
| 1064 | struct pdu *curr_pdu; |
| 1065 | struct mpcg_info *mpcginfo; |
| 1066 | struct th_header *header = NULL; |
| 1067 | struct th_sweep *sweep = NULL; |
| 1068 | int pdu_last_seen = 0; |
| 1069 | __u32 new_len; |
| 1070 | struct sk_buff *skb; |
| 1071 | int skblen; |
| 1072 | int sendrc = 0; |
| 1073 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1074 | CTCM_PR_DEBUG("ctcmpc enter: %s() %s cp:%i ch:%s\n", |
| 1075 | __func__, dev->name, smp_processor_id(), ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1076 | |
| 1077 | header = (struct th_header *)pskb->data; |
| 1078 | if ((header->th_seg == 0) && |
| 1079 | (header->th_ch_flag == 0) && |
| 1080 | (header->th_blk_flag == 0) && |
| 1081 | (header->th_seq_num == 0)) |
| 1082 | /* nothing for us */ goto done; |
| 1083 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1084 | CTCM_PR_DBGDATA("%s: th_header\n", __func__); |
| 1085 | CTCM_D3_DUMP((char *)header, TH_HEADER_LENGTH); |
| 1086 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", __func__, pskb->len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1087 | |
| 1088 | pskb->dev = dev; |
| 1089 | pskb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1090 | skb_pull(pskb, TH_HEADER_LENGTH); |
| 1091 | |
| 1092 | if (likely(header->th_ch_flag == TH_HAS_PDU)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1093 | CTCM_PR_DBGDATA("%s: came into th_has_pdu\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1094 | if ((fsm_getstate(grp->fsm) == MPCG_STATE_FLOWC) || |
| 1095 | ((fsm_getstate(grp->fsm) == MPCG_STATE_READY) && |
| 1096 | (header->th_seq_num != ch->th_seq_num + 1) && |
| 1097 | (ch->th_seq_num != 0))) { |
| 1098 | /* This is NOT the next segment * |
| 1099 | * we are not the correct race winner * |
| 1100 | * go away and let someone else win * |
| 1101 | * BUT..this only applies if xid negot * |
| 1102 | * is done * |
| 1103 | */ |
| 1104 | grp->out_of_sequence += 1; |
| 1105 | __skb_push(pskb, TH_HEADER_LENGTH); |
| 1106 | skb_queue_tail(&ch->io_queue, pskb); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1107 | CTCM_PR_DBGDATA("%s: th_seq_num expect:%08x " |
| 1108 | "got:%08x\n", __func__, |
| 1109 | ch->th_seq_num + 1, header->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1110 | |
| 1111 | return; |
| 1112 | } |
| 1113 | grp->out_of_sequence = 0; |
| 1114 | ch->th_seq_num = header->th_seq_num; |
| 1115 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1116 | CTCM_PR_DBGDATA("ctcmpc: %s() FromVTAM_th_seq=%08x\n", |
| 1117 | __func__, ch->th_seq_num); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1118 | |
| 1119 | if (unlikely(fsm_getstate(grp->fsm) != MPCG_STATE_READY)) |
| 1120 | goto done; |
| 1121 | pdu_last_seen = 0; |
| 1122 | while ((pskb->len > 0) && !pdu_last_seen) { |
| 1123 | curr_pdu = (struct pdu *)pskb->data; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1124 | |
| 1125 | CTCM_PR_DBGDATA("%s: pdu_header\n", __func__); |
| 1126 | CTCM_D3_DUMP((char *)pskb->data, PDU_HEADER_LENGTH); |
| 1127 | CTCM_PR_DBGDATA("%s: pskb len: %04x \n", |
| 1128 | __func__, pskb->len); |
| 1129 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1130 | skb_pull(pskb, PDU_HEADER_LENGTH); |
| 1131 | |
| 1132 | if (curr_pdu->pdu_flag & PDU_LAST) |
| 1133 | pdu_last_seen = 1; |
| 1134 | if (curr_pdu->pdu_flag & PDU_CNTL) |
| 1135 | pskb->protocol = htons(ETH_P_SNAP); |
| 1136 | else |
| 1137 | pskb->protocol = htons(ETH_P_SNA_DIX); |
| 1138 | |
| 1139 | if ((pskb->len <= 0) || (pskb->len > ch->max_bufsize)) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1140 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1141 | "%s(%s): Dropping packet with " |
| 1142 | "illegal siize %d", |
| 1143 | CTCM_FUNTAIL, dev->name, pskb->len); |
| 1144 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1145 | priv->stats.rx_dropped++; |
| 1146 | priv->stats.rx_length_errors++; |
| 1147 | goto done; |
| 1148 | } |
| 1149 | skb_reset_mac_header(pskb); |
| 1150 | new_len = curr_pdu->pdu_offset; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1151 | CTCM_PR_DBGDATA("%s: new_len: %04x \n", |
| 1152 | __func__, new_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1153 | if ((new_len == 0) || (new_len > pskb->len)) { |
| 1154 | /* should never happen */ |
| 1155 | /* pskb len must be hosed...bail out */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1156 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1157 | "%s(%s): non valid pdu_offset: %04x", |
| 1158 | /* "data may be lost", */ |
| 1159 | CTCM_FUNTAIL, dev->name, new_len); |
| 1160 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1161 | } |
| 1162 | skb = __dev_alloc_skb(new_len+4, GFP_ATOMIC); |
| 1163 | |
| 1164 | if (!skb) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1165 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1166 | "%s(%s): MEMORY allocation error", |
| 1167 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1168 | priv->stats.rx_dropped++; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1169 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1170 | goto done; |
| 1171 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1172 | memcpy(skb_put(skb, new_len), pskb->data, new_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1173 | |
| 1174 | skb_reset_mac_header(skb); |
| 1175 | skb->dev = pskb->dev; |
| 1176 | skb->protocol = pskb->protocol; |
| 1177 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1178 | *((__u32 *) skb_push(skb, 4)) = ch->pdu_seq; |
| 1179 | ch->pdu_seq++; |
| 1180 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1181 | if (do_debug_data) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1182 | ctcm_pr_debug("%s: ToDCM_pdu_seq= %08x\n", |
| 1183 | __func__, ch->pdu_seq); |
| 1184 | ctcm_pr_debug("%s: skb:%0lx " |
| 1185 | "skb len: %d \n", __func__, |
| 1186 | (unsigned long)skb, skb->len); |
| 1187 | ctcm_pr_debug("%s: up to 32 bytes " |
| 1188 | "of pdu_data sent\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1189 | ctcmpc_dump32((char *)skb->data, skb->len); |
| 1190 | } |
| 1191 | |
| 1192 | skblen = skb->len; |
| 1193 | sendrc = netif_rx(skb); |
| 1194 | priv->stats.rx_packets++; |
| 1195 | priv->stats.rx_bytes += skblen; |
| 1196 | skb_pull(pskb, new_len); /* point to next PDU */ |
| 1197 | } |
| 1198 | } else { |
| 1199 | mpcginfo = (struct mpcg_info *) |
| 1200 | kmalloc(sizeof(struct mpcg_info), gfp_type()); |
| 1201 | if (mpcginfo == NULL) |
| 1202 | goto done; |
| 1203 | |
| 1204 | mpcginfo->ch = ch; |
| 1205 | mpcginfo->th = header; |
| 1206 | mpcginfo->skb = pskb; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1207 | CTCM_PR_DEBUG("%s: Not PDU - may be control pkt\n", |
| 1208 | __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1209 | /* it's a sweep? */ |
| 1210 | sweep = (struct th_sweep *)pskb->data; |
| 1211 | mpcginfo->sweep = sweep; |
| 1212 | if (header->th_ch_flag == TH_SWEEP_REQ) |
| 1213 | mpc_rcvd_sweep_req(mpcginfo); |
| 1214 | else if (header->th_ch_flag == TH_SWEEP_RESP) |
| 1215 | mpc_rcvd_sweep_resp(mpcginfo); |
| 1216 | else if (header->th_blk_flag == TH_DATA_IS_XID) { |
| 1217 | struct xid2 *thisxid = (struct xid2 *)pskb->data; |
| 1218 | skb_pull(pskb, XID2_LENGTH); |
| 1219 | mpcginfo->xid = thisxid; |
| 1220 | fsm_event(grp->fsm, MPCG_EVENT_XID2, mpcginfo); |
| 1221 | } else if (header->th_blk_flag == TH_DISCONTACT) |
| 1222 | fsm_event(grp->fsm, MPCG_EVENT_DISCONC, mpcginfo); |
| 1223 | else if (header->th_seq_num != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1224 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1225 | "%s(%s): control pkt expected\n", |
| 1226 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1227 | priv->stats.rx_dropped++; |
| 1228 | /* mpcginfo only used for non-data transfers */ |
| 1229 | kfree(mpcginfo); |
| 1230 | if (do_debug_data) |
| 1231 | ctcmpc_dump_skb(pskb, -8); |
| 1232 | } |
| 1233 | } |
| 1234 | done: |
| 1235 | |
| 1236 | dev_kfree_skb_any(pskb); |
| 1237 | if (sendrc == NET_RX_DROP) { |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame^] | 1238 | dev_warn(&dev->dev, |
| 1239 | "The network backlog for %s is exceeded, " |
| 1240 | "package dropped\n", __func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1241 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1242 | } |
| 1243 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1244 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
| 1245 | __func__, dev->name, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1246 | } |
| 1247 | |
| 1248 | /** |
| 1249 | * tasklet helper for mpc's skb unpacking. |
| 1250 | * |
| 1251 | * ch The channel to work on. |
| 1252 | * Allow flow control back pressure to occur here. |
| 1253 | * Throttling back channel can result in excessive |
| 1254 | * channel inactivity and system deact of channel |
| 1255 | */ |
| 1256 | void ctcmpc_bh(unsigned long thischan) |
| 1257 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1258 | struct channel *ch = (struct channel *)thischan; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1259 | struct sk_buff *skb; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1260 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1261 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1262 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1263 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1264 | CTCM_PR_DEBUG("%s cp:%i enter: %s() %s\n", |
| 1265 | dev->name, smp_processor_id(), __func__, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1266 | /* caller has requested driver to throttle back */ |
| 1267 | while ((fsm_getstate(grp->fsm) != MPCG_STATE_FLOWC) && |
| 1268 | (skb = skb_dequeue(&ch->io_queue))) { |
| 1269 | ctcmpc_unpack_skb(ch, skb); |
| 1270 | if (grp->out_of_sequence > 20) { |
| 1271 | /* assume data loss has occurred if */ |
| 1272 | /* missing seq_num for extended */ |
| 1273 | /* period of time */ |
| 1274 | grp->out_of_sequence = 0; |
| 1275 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1276 | break; |
| 1277 | } |
| 1278 | if (skb == skb_peek(&ch->io_queue)) |
| 1279 | break; |
| 1280 | } |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1281 | CTCM_PR_DEBUG("exit %s: %s: ch=0x%p id=%s\n", |
| 1282 | __func__, dev->name, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1283 | return; |
| 1284 | } |
| 1285 | |
| 1286 | /* |
| 1287 | * MPC Group Initializations |
| 1288 | */ |
| 1289 | struct mpc_group *ctcmpc_init_mpc_group(struct ctcm_priv *priv) |
| 1290 | { |
| 1291 | struct mpc_group *grp; |
| 1292 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1293 | CTCM_DBF_TEXT_(MPC_SETUP, CTC_DBF_INFO, |
| 1294 | "Enter %s(%p)", CTCM_FUNTAIL, priv); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1295 | |
| 1296 | grp = kzalloc(sizeof(struct mpc_group), GFP_KERNEL); |
| 1297 | if (grp == NULL) |
| 1298 | return NULL; |
| 1299 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1300 | grp->fsm = init_fsm("mpcg", mpcg_state_names, mpcg_event_names, |
| 1301 | MPCG_NR_STATES, MPCG_NR_EVENTS, mpcg_fsm, |
| 1302 | mpcg_fsm_len, GFP_KERNEL); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1303 | if (grp->fsm == NULL) { |
| 1304 | kfree(grp); |
| 1305 | return NULL; |
| 1306 | } |
| 1307 | |
| 1308 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
| 1309 | fsm_settimer(grp->fsm, &grp->timer); |
| 1310 | |
| 1311 | grp->xid_skb = |
| 1312 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC | GFP_DMA); |
| 1313 | if (grp->xid_skb == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1314 | kfree_fsm(grp->fsm); |
| 1315 | kfree(grp); |
| 1316 | return NULL; |
| 1317 | } |
| 1318 | /* base xid for all channels in group */ |
| 1319 | grp->xid_skb_data = grp->xid_skb->data; |
| 1320 | grp->xid_th = (struct th_header *)grp->xid_skb->data; |
| 1321 | memcpy(skb_put(grp->xid_skb, TH_HEADER_LENGTH), |
| 1322 | &thnorm, TH_HEADER_LENGTH); |
| 1323 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1324 | grp->xid = (struct xid2 *)skb_tail_pointer(grp->xid_skb); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1325 | memcpy(skb_put(grp->xid_skb, XID2_LENGTH), &init_xid, XID2_LENGTH); |
| 1326 | grp->xid->xid2_adj_id = jiffies | 0xfff00000; |
| 1327 | grp->xid->xid2_sender_id = jiffies; |
| 1328 | |
| 1329 | grp->xid_id = skb_tail_pointer(grp->xid_skb); |
| 1330 | memcpy(skb_put(grp->xid_skb, 4), "VTAM", 4); |
| 1331 | |
| 1332 | grp->rcvd_xid_skb = |
| 1333 | __dev_alloc_skb(MPC_BUFSIZE_DEFAULT, GFP_ATOMIC|GFP_DMA); |
| 1334 | if (grp->rcvd_xid_skb == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1335 | kfree_fsm(grp->fsm); |
| 1336 | dev_kfree_skb(grp->xid_skb); |
| 1337 | kfree(grp); |
| 1338 | return NULL; |
| 1339 | } |
| 1340 | grp->rcvd_xid_data = grp->rcvd_xid_skb->data; |
| 1341 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; |
| 1342 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), |
| 1343 | &thnorm, TH_HEADER_LENGTH); |
| 1344 | grp->saved_xid2 = NULL; |
| 1345 | priv->xid = grp->xid; |
| 1346 | priv->mpcg = grp; |
| 1347 | return grp; |
| 1348 | } |
| 1349 | |
| 1350 | /* |
| 1351 | * The MPC Group Station FSM |
| 1352 | */ |
| 1353 | |
| 1354 | /* |
| 1355 | * MPC Group Station FSM actions |
| 1356 | * CTCM_PROTO_MPC only |
| 1357 | */ |
| 1358 | |
| 1359 | /** |
| 1360 | * NOP action for statemachines |
| 1361 | */ |
| 1362 | static void mpc_action_nop(fsm_instance *fi, int event, void *arg) |
| 1363 | { |
| 1364 | } |
| 1365 | |
| 1366 | /* |
| 1367 | * invoked when the device transitions to dev_stopped |
| 1368 | * MPC will stop each individual channel if a single XID failure |
| 1369 | * occurs, or will intitiate all channels be stopped if a GROUP |
| 1370 | * level failure occurs. |
| 1371 | */ |
| 1372 | static void mpc_action_go_inop(fsm_instance *fi, int event, void *arg) |
| 1373 | { |
| 1374 | struct net_device *dev = arg; |
| 1375 | struct ctcm_priv *priv; |
| 1376 | struct mpc_group *grp; |
| 1377 | int rc = 0; |
| 1378 | struct channel *wch, *rch; |
| 1379 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1380 | BUG_ON(dev == NULL); |
| 1381 | CTCM_PR_DEBUG("Enter %s: %s\n", __func__, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1382 | |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1383 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1384 | grp = priv->mpcg; |
| 1385 | grp->flow_off_called = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1386 | fsm_deltimer(&grp->timer); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1387 | if (grp->channels_terminating) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1388 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1389 | |
| 1390 | grp->channels_terminating = 1; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1391 | grp->saved_state = fsm_getstate(grp->fsm); |
| 1392 | fsm_newstate(grp->fsm, MPCG_STATE_INOP); |
| 1393 | if (grp->saved_state > MPCG_STATE_XID7INITF) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1394 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1395 | "%s(%s): MPC GROUP INOPERATIVE", |
| 1396 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1397 | if ((grp->saved_state != MPCG_STATE_RESET) || |
| 1398 | /* dealloc_channel has been called */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1399 | ((grp->saved_state == MPCG_STATE_RESET) && |
| 1400 | (grp->port_persist == 0))) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1401 | fsm_deltimer(&priv->restart_timer); |
| 1402 | |
| 1403 | wch = priv->channel[WRITE]; |
| 1404 | rch = priv->channel[READ]; |
| 1405 | |
| 1406 | switch (grp->saved_state) { |
| 1407 | case MPCG_STATE_RESET: |
| 1408 | case MPCG_STATE_INOP: |
| 1409 | case MPCG_STATE_XID2INITW: |
| 1410 | case MPCG_STATE_XID0IOWAIT: |
| 1411 | case MPCG_STATE_XID2INITX: |
| 1412 | case MPCG_STATE_XID7INITW: |
| 1413 | case MPCG_STATE_XID7INITX: |
| 1414 | case MPCG_STATE_XID0IOWAIX: |
| 1415 | case MPCG_STATE_XID7INITI: |
| 1416 | case MPCG_STATE_XID7INITZ: |
| 1417 | case MPCG_STATE_XID7INITF: |
| 1418 | break; |
| 1419 | case MPCG_STATE_FLOWC: |
| 1420 | case MPCG_STATE_READY: |
| 1421 | default: |
| 1422 | tasklet_hi_schedule(&wch->ch_disc_tasklet); |
| 1423 | } |
| 1424 | |
| 1425 | grp->xid2_tgnum = 0; |
| 1426 | grp->group_max_buflen = 0; /*min of all received */ |
| 1427 | grp->outstanding_xid2 = 0; |
| 1428 | grp->outstanding_xid7 = 0; |
| 1429 | grp->outstanding_xid7_p2 = 0; |
| 1430 | grp->saved_xid2 = NULL; |
| 1431 | grp->xidnogood = 0; |
| 1432 | grp->changed_side = 0; |
| 1433 | |
| 1434 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; |
| 1435 | skb_reset_tail_pointer(grp->rcvd_xid_skb); |
| 1436 | grp->rcvd_xid_skb->len = 0; |
| 1437 | grp->rcvd_xid_th = (struct th_header *)grp->rcvd_xid_skb->data; |
| 1438 | memcpy(skb_put(grp->rcvd_xid_skb, TH_HEADER_LENGTH), &thnorm, |
| 1439 | TH_HEADER_LENGTH); |
| 1440 | |
| 1441 | if (grp->send_qllc_disc == 1) { |
| 1442 | grp->send_qllc_disc = 0; |
| 1443 | rc = mpc_send_qllc_discontact(dev); |
| 1444 | } |
| 1445 | |
| 1446 | /* DO NOT issue DEV_EVENT_STOP directly out of this code */ |
| 1447 | /* This can result in INOP of VTAM PU due to halting of */ |
| 1448 | /* outstanding IO which causes a sense to be returned */ |
| 1449 | /* Only about 3 senses are allowed and then IOS/VTAM will*/ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1450 | /* become unreachable without manual intervention */ |
| 1451 | if ((grp->port_persist == 1) || (grp->alloc_called)) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1452 | grp->alloc_called = 0; |
| 1453 | fsm_deltimer(&priv->restart_timer); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1454 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_RESTART, dev); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1455 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
| 1456 | if (grp->saved_state > MPCG_STATE_XID7INITF) |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1457 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
| 1458 | "%s(%s): MPC GROUP RECOVERY SCHEDULED", |
| 1459 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1460 | } else { |
| 1461 | fsm_deltimer(&priv->restart_timer); |
| 1462 | fsm_addtimer(&priv->restart_timer, 500, DEV_EVENT_STOP, dev); |
| 1463 | fsm_newstate(grp->fsm, MPCG_STATE_RESET); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1464 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_ALWAYS, |
| 1465 | "%s(%s): NO MPC GROUP RECOVERY ATTEMPTED", |
| 1466 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1467 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1468 | } |
| 1469 | |
| 1470 | /** |
| 1471 | * Handle mpc group action timeout. |
| 1472 | * MPC Group Station FSM action |
| 1473 | * CTCM_PROTO_MPC only |
| 1474 | * |
| 1475 | * fi An instance of an mpc_group fsm. |
| 1476 | * event The event, just happened. |
| 1477 | * arg Generic pointer, casted from net_device * upon call. |
| 1478 | */ |
| 1479 | static void mpc_action_timeout(fsm_instance *fi, int event, void *arg) |
| 1480 | { |
| 1481 | struct net_device *dev = arg; |
| 1482 | struct ctcm_priv *priv; |
| 1483 | struct mpc_group *grp; |
| 1484 | struct channel *wch; |
| 1485 | struct channel *rch; |
| 1486 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1487 | BUG_ON(dev == NULL); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1488 | |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1489 | priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1490 | grp = priv->mpcg; |
| 1491 | wch = priv->channel[WRITE]; |
| 1492 | rch = priv->channel[READ]; |
| 1493 | |
| 1494 | switch (fsm_getstate(grp->fsm)) { |
| 1495 | case MPCG_STATE_XID2INITW: |
| 1496 | /* Unless there is outstanding IO on the */ |
| 1497 | /* channel just return and wait for ATTN */ |
| 1498 | /* interrupt to begin XID negotiations */ |
| 1499 | if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) && |
| 1500 | (fsm_getstate(wch->fsm) == CH_XID0_PENDING)) |
| 1501 | break; |
| 1502 | default: |
| 1503 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1504 | } |
| 1505 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1506 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_DEBUG, |
| 1507 | "%s: dev=%s exit", |
| 1508 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1509 | return; |
| 1510 | } |
| 1511 | |
| 1512 | /* |
| 1513 | * MPC Group Station FSM action |
| 1514 | * CTCM_PROTO_MPC only |
| 1515 | */ |
| 1516 | void mpc_action_discontact(fsm_instance *fi, int event, void *arg) |
| 1517 | { |
| 1518 | struct mpcg_info *mpcginfo = arg; |
| 1519 | struct channel *ch = mpcginfo->ch; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1520 | struct net_device *dev; |
| 1521 | struct ctcm_priv *priv; |
| 1522 | struct mpc_group *grp; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1523 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1524 | if (ch) { |
| 1525 | dev = ch->netdev; |
| 1526 | if (dev) { |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1527 | priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1528 | if (priv) { |
| 1529 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1530 | "%s: %s: %s\n", |
| 1531 | CTCM_FUNTAIL, dev->name, ch->id); |
| 1532 | grp = priv->mpcg; |
| 1533 | grp->send_qllc_disc = 1; |
| 1534 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1535 | } |
| 1536 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1537 | } |
| 1538 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1539 | return; |
| 1540 | } |
| 1541 | |
| 1542 | /* |
| 1543 | * MPC Group Station - not part of FSM |
| 1544 | * CTCM_PROTO_MPC only |
| 1545 | * called from add_channel in ctcm_main.c |
| 1546 | */ |
| 1547 | void mpc_action_send_discontact(unsigned long thischan) |
| 1548 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1549 | int rc; |
| 1550 | struct channel *ch = (struct channel *)thischan; |
| 1551 | unsigned long saveflags = 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1552 | |
| 1553 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1554 | rc = ccw_device_start(ch->cdev, &ch->ccw[15], |
| 1555 | (unsigned long)ch, 0xff, 0); |
| 1556 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 1557 | |
| 1558 | if (rc != 0) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1559 | ctcm_ccw_check_rc(ch, rc, (char *)__func__); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1560 | } |
| 1561 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1562 | return; |
| 1563 | } |
| 1564 | |
| 1565 | |
| 1566 | /* |
| 1567 | * helper function of mpc FSM |
| 1568 | * CTCM_PROTO_MPC only |
| 1569 | * mpc_action_rcvd_xid7 |
| 1570 | */ |
| 1571 | static int mpc_validate_xid(struct mpcg_info *mpcginfo) |
| 1572 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1573 | struct channel *ch = mpcginfo->ch; |
| 1574 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1575 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1576 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1577 | struct xid2 *xid = mpcginfo->xid; |
| 1578 | int rc = 0; |
| 1579 | __u64 our_id = 0; |
| 1580 | __u64 their_id = 0; |
| 1581 | int len = TH_HEADER_LENGTH + PDU_HEADER_LENGTH; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1582 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1583 | CTCM_PR_DEBUG("Enter %s: xid=%p\n", __func__, xid); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1584 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1585 | if (xid == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1586 | rc = 1; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1587 | /* XID REJECTED: xid == NULL */ |
| 1588 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1589 | "%s(%s): xid = NULL", |
| 1590 | CTCM_FUNTAIL, ch->id); |
| 1591 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1592 | } |
| 1593 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1594 | CTCM_D3_DUMP((char *)xid, XID2_LENGTH); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1595 | |
| 1596 | /*the received direction should be the opposite of ours */ |
| 1597 | if (((CHANNEL_DIRECTION(ch->flags) == READ) ? XID2_WRITE_SIDE : |
| 1598 | XID2_READ_SIDE) != xid->xid2_dlc_type) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1599 | rc = 2; |
| 1600 | /* XID REJECTED: r/w channel pairing mismatch */ |
| 1601 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1602 | "%s(%s): r/w channel pairing mismatch", |
| 1603 | CTCM_FUNTAIL, ch->id); |
| 1604 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1605 | } |
| 1606 | |
| 1607 | if (xid->xid2_dlc_type == XID2_READ_SIDE) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1608 | CTCM_PR_DEBUG("%s: grpmaxbuf:%d xid2buflen:%d\n", __func__, |
| 1609 | grp->group_max_buflen, xid->xid2_buf_len); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1610 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1611 | if (grp->group_max_buflen == 0 || grp->group_max_buflen > |
| 1612 | xid->xid2_buf_len - len) |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1613 | grp->group_max_buflen = xid->xid2_buf_len - len; |
| 1614 | } |
| 1615 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1616 | if (grp->saved_xid2 == NULL) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1617 | grp->saved_xid2 = |
| 1618 | (struct xid2 *)skb_tail_pointer(grp->rcvd_xid_skb); |
| 1619 | |
| 1620 | memcpy(skb_put(grp->rcvd_xid_skb, |
| 1621 | XID2_LENGTH), xid, XID2_LENGTH); |
| 1622 | grp->rcvd_xid_skb->data = grp->rcvd_xid_data; |
| 1623 | |
| 1624 | skb_reset_tail_pointer(grp->rcvd_xid_skb); |
| 1625 | grp->rcvd_xid_skb->len = 0; |
| 1626 | |
| 1627 | /* convert two 32 bit numbers into 1 64 bit for id compare */ |
| 1628 | our_id = (__u64)priv->xid->xid2_adj_id; |
| 1629 | our_id = our_id << 32; |
| 1630 | our_id = our_id + priv->xid->xid2_sender_id; |
| 1631 | their_id = (__u64)xid->xid2_adj_id; |
| 1632 | their_id = their_id << 32; |
| 1633 | their_id = their_id + xid->xid2_sender_id; |
| 1634 | /* lower id assume the xside role */ |
| 1635 | if (our_id < their_id) { |
| 1636 | grp->roll = XSIDE; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1637 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1638 | "%s(%s): WE HAVE LOW ID - TAKE XSIDE", |
| 1639 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1640 | } else { |
| 1641 | grp->roll = YSIDE; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1642 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_NOTICE, |
| 1643 | "%s(%s): WE HAVE HIGH ID - TAKE YSIDE", |
| 1644 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1645 | } |
| 1646 | |
| 1647 | } else { |
| 1648 | if (xid->xid2_flag4 != grp->saved_xid2->xid2_flag4) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1649 | rc = 3; |
| 1650 | /* XID REJECTED: xid flag byte4 mismatch */ |
| 1651 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1652 | "%s(%s): xid flag byte4 mismatch", |
| 1653 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1654 | } |
| 1655 | if (xid->xid2_flag2 == 0x40) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1656 | rc = 4; |
| 1657 | /* XID REJECTED - xid NOGOOD */ |
| 1658 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1659 | "%s(%s): xid NOGOOD", |
| 1660 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1661 | } |
| 1662 | if (xid->xid2_adj_id != grp->saved_xid2->xid2_adj_id) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1663 | rc = 5; |
| 1664 | /* XID REJECTED - Adjacent Station ID Mismatch */ |
| 1665 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1666 | "%s(%s): Adjacent Station ID Mismatch", |
| 1667 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1668 | } |
| 1669 | if (xid->xid2_sender_id != grp->saved_xid2->xid2_sender_id) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1670 | rc = 6; |
| 1671 | /* XID REJECTED - Sender Address Mismatch */ |
| 1672 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1673 | "%s(%s): Sender Address Mismatch", |
| 1674 | CTCM_FUNTAIL, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1675 | } |
| 1676 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1677 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1678 | if (rc) { |
Peter Tiedemann | 2a7c6f2 | 2008-12-25 13:39:54 +0100 | [diff] [blame^] | 1679 | dev_warn(&dev->dev, |
| 1680 | "The XID used in the MPC protocol is not valid, " |
| 1681 | "rc = %d\n", rc); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1682 | priv->xid->xid2_flag2 = 0x40; |
| 1683 | grp->saved_xid2->xid2_flag2 = 0x40; |
| 1684 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1685 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1686 | return rc; |
| 1687 | } |
| 1688 | |
| 1689 | /* |
| 1690 | * MPC Group Station FSM action |
| 1691 | * CTCM_PROTO_MPC only |
| 1692 | */ |
| 1693 | static void mpc_action_side_xid(fsm_instance *fsm, void *arg, int side) |
| 1694 | { |
| 1695 | struct channel *ch = arg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1696 | int rc = 0; |
| 1697 | int gotlock = 0; |
| 1698 | unsigned long saveflags = 0; /* avoids compiler warning with |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1699 | spin_unlock_irqrestore */ |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1700 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1701 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 1702 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1703 | |
| 1704 | if (ctcm_checkalloc_buffer(ch)) |
| 1705 | goto done; |
| 1706 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1707 | /* |
| 1708 | * skb data-buffer referencing: |
| 1709 | */ |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1710 | ch->trans_skb->data = ch->trans_skb_data; |
| 1711 | skb_reset_tail_pointer(ch->trans_skb); |
| 1712 | ch->trans_skb->len = 0; |
| 1713 | /* result of the previous 3 statements is NOT always |
| 1714 | * already set after ctcm_checkalloc_buffer |
| 1715 | * because of possible reuse of the trans_skb |
| 1716 | */ |
| 1717 | memset(ch->trans_skb->data, 0, 16); |
| 1718 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; |
| 1719 | /* check is main purpose here: */ |
| 1720 | skb_put(ch->trans_skb, TH_HEADER_LENGTH); |
| 1721 | ch->rcvd_xid = (struct xid2 *)skb_tail_pointer(ch->trans_skb); |
| 1722 | /* check is main purpose here: */ |
| 1723 | skb_put(ch->trans_skb, XID2_LENGTH); |
| 1724 | ch->rcvd_xid_id = skb_tail_pointer(ch->trans_skb); |
| 1725 | /* cleanup back to startpoint */ |
| 1726 | ch->trans_skb->data = ch->trans_skb_data; |
| 1727 | skb_reset_tail_pointer(ch->trans_skb); |
| 1728 | ch->trans_skb->len = 0; |
| 1729 | |
| 1730 | /* non-checking rewrite of above skb data-buffer referencing: */ |
| 1731 | /* |
| 1732 | memset(ch->trans_skb->data, 0, 16); |
| 1733 | ch->rcvd_xid_th = (struct th_header *)ch->trans_skb_data; |
| 1734 | ch->rcvd_xid = (struct xid2 *)(ch->trans_skb_data + TH_HEADER_LENGTH); |
| 1735 | ch->rcvd_xid_id = ch->trans_skb_data + TH_HEADER_LENGTH + XID2_LENGTH; |
| 1736 | */ |
| 1737 | |
| 1738 | ch->ccw[8].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1739 | ch->ccw[8].count = 0; |
| 1740 | ch->ccw[8].cda = 0x00; |
| 1741 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1742 | if (!(ch->xid_th && ch->xid && ch->xid_id)) |
| 1743 | CTCM_DBF_TEXT_(MPC_TRACE, CTC_DBF_INFO, |
| 1744 | "%s(%s): xid_th=%p, xid=%p, xid_id=%p", |
| 1745 | CTCM_FUNTAIL, ch->id, ch->xid_th, ch->xid, ch->xid_id); |
| 1746 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1747 | if (side == XSIDE) { |
| 1748 | /* mpc_action_xside_xid */ |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1749 | if (ch->xid_th == NULL) |
| 1750 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1751 | ch->ccw[9].cmd_code = CCW_CMD_WRITE; |
| 1752 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1753 | ch->ccw[9].count = TH_HEADER_LENGTH; |
| 1754 | ch->ccw[9].cda = virt_to_phys(ch->xid_th); |
| 1755 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1756 | if (ch->xid == NULL) |
| 1757 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1758 | ch->ccw[10].cmd_code = CCW_CMD_WRITE; |
| 1759 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1760 | ch->ccw[10].count = XID2_LENGTH; |
| 1761 | ch->ccw[10].cda = virt_to_phys(ch->xid); |
| 1762 | |
| 1763 | ch->ccw[11].cmd_code = CCW_CMD_READ; |
| 1764 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1765 | ch->ccw[11].count = TH_HEADER_LENGTH; |
| 1766 | ch->ccw[11].cda = virt_to_phys(ch->rcvd_xid_th); |
| 1767 | |
| 1768 | ch->ccw[12].cmd_code = CCW_CMD_READ; |
| 1769 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1770 | ch->ccw[12].count = XID2_LENGTH; |
| 1771 | ch->ccw[12].cda = virt_to_phys(ch->rcvd_xid); |
| 1772 | |
| 1773 | ch->ccw[13].cmd_code = CCW_CMD_READ; |
| 1774 | ch->ccw[13].cda = virt_to_phys(ch->rcvd_xid_id); |
| 1775 | |
| 1776 | } else { /* side == YSIDE : mpc_action_yside_xid */ |
| 1777 | ch->ccw[9].cmd_code = CCW_CMD_READ; |
| 1778 | ch->ccw[9].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1779 | ch->ccw[9].count = TH_HEADER_LENGTH; |
| 1780 | ch->ccw[9].cda = virt_to_phys(ch->rcvd_xid_th); |
| 1781 | |
| 1782 | ch->ccw[10].cmd_code = CCW_CMD_READ; |
| 1783 | ch->ccw[10].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1784 | ch->ccw[10].count = XID2_LENGTH; |
| 1785 | ch->ccw[10].cda = virt_to_phys(ch->rcvd_xid); |
| 1786 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1787 | if (ch->xid_th == NULL) |
| 1788 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1789 | ch->ccw[11].cmd_code = CCW_CMD_WRITE; |
| 1790 | ch->ccw[11].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1791 | ch->ccw[11].count = TH_HEADER_LENGTH; |
| 1792 | ch->ccw[11].cda = virt_to_phys(ch->xid_th); |
| 1793 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1794 | if (ch->xid == NULL) |
| 1795 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1796 | ch->ccw[12].cmd_code = CCW_CMD_WRITE; |
| 1797 | ch->ccw[12].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1798 | ch->ccw[12].count = XID2_LENGTH; |
| 1799 | ch->ccw[12].cda = virt_to_phys(ch->xid); |
| 1800 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1801 | if (ch->xid_id == NULL) |
| 1802 | goto done; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1803 | ch->ccw[13].cmd_code = CCW_CMD_WRITE; |
| 1804 | ch->ccw[13].cda = virt_to_phys(ch->xid_id); |
| 1805 | |
| 1806 | } |
| 1807 | ch->ccw[13].flags = CCW_FLAG_SLI | CCW_FLAG_CC; |
| 1808 | ch->ccw[13].count = 4; |
| 1809 | |
| 1810 | ch->ccw[14].cmd_code = CCW_CMD_NOOP; |
| 1811 | ch->ccw[14].flags = CCW_FLAG_SLI; |
| 1812 | ch->ccw[14].count = 0; |
| 1813 | ch->ccw[14].cda = 0; |
| 1814 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1815 | CTCM_CCW_DUMP((char *)&ch->ccw[8], sizeof(struct ccw1) * 7); |
| 1816 | CTCM_D3_DUMP((char *)ch->xid_th, TH_HEADER_LENGTH); |
| 1817 | CTCM_D3_DUMP((char *)ch->xid, XID2_LENGTH); |
| 1818 | CTCM_D3_DUMP((char *)ch->xid_id, 4); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1819 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1820 | if (!in_irq()) { |
| 1821 | /* Such conditional locking is a known problem for |
| 1822 | * sparse because its static undeterministic. |
| 1823 | * Warnings should be ignored here. */ |
| 1824 | spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags); |
| 1825 | gotlock = 1; |
| 1826 | } |
| 1827 | |
| 1828 | fsm_addtimer(&ch->timer, 5000 , CTC_EVENT_TIMER, ch); |
| 1829 | rc = ccw_device_start(ch->cdev, &ch->ccw[8], |
| 1830 | (unsigned long)ch, 0xff, 0); |
| 1831 | |
| 1832 | if (gotlock) /* see remark above about conditional locking */ |
| 1833 | spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags); |
| 1834 | |
| 1835 | if (rc != 0) { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1836 | ctcm_ccw_check_rc(ch, rc, |
| 1837 | (side == XSIDE) ? "x-side XID" : "y-side XID"); |
| 1838 | } |
| 1839 | |
| 1840 | done: |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1841 | CTCM_PR_DEBUG("Exit %s: ch=0x%p id=%s\n", |
| 1842 | __func__, ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1843 | return; |
| 1844 | |
| 1845 | } |
| 1846 | |
| 1847 | /* |
| 1848 | * MPC Group Station FSM action |
| 1849 | * CTCM_PROTO_MPC only |
| 1850 | */ |
| 1851 | static void mpc_action_xside_xid(fsm_instance *fsm, int event, void *arg) |
| 1852 | { |
| 1853 | mpc_action_side_xid(fsm, arg, XSIDE); |
| 1854 | } |
| 1855 | |
| 1856 | /* |
| 1857 | * MPC Group Station FSM action |
| 1858 | * CTCM_PROTO_MPC only |
| 1859 | */ |
| 1860 | static void mpc_action_yside_xid(fsm_instance *fsm, int event, void *arg) |
| 1861 | { |
| 1862 | mpc_action_side_xid(fsm, arg, YSIDE); |
| 1863 | } |
| 1864 | |
| 1865 | /* |
| 1866 | * MPC Group Station FSM action |
| 1867 | * CTCM_PROTO_MPC only |
| 1868 | */ |
| 1869 | static void mpc_action_doxid0(fsm_instance *fsm, int event, void *arg) |
| 1870 | { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1871 | struct channel *ch = arg; |
| 1872 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1873 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1874 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1875 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1876 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 1877 | __func__, smp_processor_id(), ch, ch->id); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1878 | |
| 1879 | if (ch->xid == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1880 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 1881 | "%s(%s): ch->xid == NULL", |
| 1882 | CTCM_FUNTAIL, dev->name); |
| 1883 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1884 | } |
| 1885 | |
| 1886 | fsm_newstate(ch->fsm, CH_XID0_INPROGRESS); |
| 1887 | |
| 1888 | ch->xid->xid2_option = XID2_0; |
| 1889 | |
| 1890 | switch (fsm_getstate(grp->fsm)) { |
| 1891 | case MPCG_STATE_XID2INITW: |
| 1892 | case MPCG_STATE_XID2INITX: |
| 1893 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1894 | break; |
| 1895 | case MPCG_STATE_XID0IOWAIT: |
| 1896 | case MPCG_STATE_XID0IOWAIX: |
| 1897 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1898 | break; |
| 1899 | } |
| 1900 | |
| 1901 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); |
| 1902 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1903 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1904 | } |
| 1905 | |
| 1906 | /* |
| 1907 | * MPC Group Station FSM action |
| 1908 | * CTCM_PROTO_MPC only |
| 1909 | */ |
| 1910 | static void mpc_action_doxid7(fsm_instance *fsm, int event, void *arg) |
| 1911 | { |
| 1912 | struct net_device *dev = arg; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1913 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1914 | struct mpc_group *grp = NULL; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1915 | int direction; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1916 | int send = 0; |
| 1917 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1918 | if (priv) |
| 1919 | grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1920 | if (grp == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1921 | fsm_event(grp->fsm, MPCG_EVENT_INOP, dev); |
| 1922 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1923 | } |
| 1924 | |
| 1925 | for (direction = READ; direction <= WRITE; direction++) { |
| 1926 | struct channel *ch = priv->channel[direction]; |
| 1927 | struct xid2 *thisxid = ch->xid; |
| 1928 | ch->xid_skb->data = ch->xid_skb_data; |
| 1929 | skb_reset_tail_pointer(ch->xid_skb); |
| 1930 | ch->xid_skb->len = 0; |
| 1931 | thisxid->xid2_option = XID2_7; |
| 1932 | send = 0; |
| 1933 | |
| 1934 | /* xid7 phase 1 */ |
| 1935 | if (grp->outstanding_xid7_p2 > 0) { |
| 1936 | if (grp->roll == YSIDE) { |
| 1937 | if (fsm_getstate(ch->fsm) == CH_XID7_PENDING1) { |
| 1938 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); |
| 1939 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1940 | memcpy(skb_put(ch->xid_skb, |
| 1941 | TH_HEADER_LENGTH), |
| 1942 | &thdummy, TH_HEADER_LENGTH); |
| 1943 | send = 1; |
| 1944 | } |
| 1945 | } else if (fsm_getstate(ch->fsm) < CH_XID7_PENDING2) { |
| 1946 | fsm_newstate(ch->fsm, CH_XID7_PENDING2); |
| 1947 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1948 | memcpy(skb_put(ch->xid_skb, |
| 1949 | TH_HEADER_LENGTH), |
| 1950 | &thnorm, TH_HEADER_LENGTH); |
| 1951 | send = 1; |
| 1952 | } |
| 1953 | } else { |
| 1954 | /* xid7 phase 2 */ |
| 1955 | if (grp->roll == YSIDE) { |
| 1956 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING4) { |
| 1957 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); |
| 1958 | memcpy(skb_put(ch->xid_skb, |
| 1959 | TH_HEADER_LENGTH), |
| 1960 | &thnorm, TH_HEADER_LENGTH); |
| 1961 | ch->ccw[8].cmd_code = CCW_CMD_WRITE_CTL; |
| 1962 | send = 1; |
| 1963 | } |
| 1964 | } else if (fsm_getstate(ch->fsm) == CH_XID7_PENDING3) { |
| 1965 | fsm_newstate(ch->fsm, CH_XID7_PENDING4); |
| 1966 | ch->ccw[8].cmd_code = CCW_CMD_SENSE_CMD; |
| 1967 | memcpy(skb_put(ch->xid_skb, TH_HEADER_LENGTH), |
| 1968 | &thdummy, TH_HEADER_LENGTH); |
| 1969 | send = 1; |
| 1970 | } |
| 1971 | } |
| 1972 | |
| 1973 | if (send) |
| 1974 | fsm_event(grp->fsm, MPCG_EVENT_DOIO, ch); |
| 1975 | } |
| 1976 | |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1977 | return; |
| 1978 | } |
| 1979 | |
| 1980 | /* |
| 1981 | * MPC Group Station FSM action |
| 1982 | * CTCM_PROTO_MPC only |
| 1983 | */ |
| 1984 | static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) |
| 1985 | { |
| 1986 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1987 | struct mpcg_info *mpcginfo = arg; |
| 1988 | struct channel *ch = mpcginfo->ch; |
| 1989 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 1990 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1991 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1992 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 1993 | CTCM_PR_DEBUG("%s: ch-id:%s xid2:%i xid7:%i xidt_p2:%i \n", |
| 1994 | __func__, ch->id, grp->outstanding_xid2, |
| 1995 | grp->outstanding_xid7, grp->outstanding_xid7_p2); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 1996 | |
| 1997 | if (fsm_getstate(ch->fsm) < CH_XID7_PENDING) |
| 1998 | fsm_newstate(ch->fsm, CH_XID7_PENDING); |
| 1999 | |
| 2000 | grp->outstanding_xid2--; |
| 2001 | grp->outstanding_xid7++; |
| 2002 | grp->outstanding_xid7_p2++; |
| 2003 | |
| 2004 | /* must change state before validating xid to */ |
| 2005 | /* properly handle interim interrupts received*/ |
| 2006 | switch (fsm_getstate(grp->fsm)) { |
| 2007 | case MPCG_STATE_XID2INITW: |
| 2008 | fsm_newstate(grp->fsm, MPCG_STATE_XID2INITX); |
| 2009 | mpc_validate_xid(mpcginfo); |
| 2010 | break; |
| 2011 | case MPCG_STATE_XID0IOWAIT: |
| 2012 | fsm_newstate(grp->fsm, MPCG_STATE_XID0IOWAIX); |
| 2013 | mpc_validate_xid(mpcginfo); |
| 2014 | break; |
| 2015 | case MPCG_STATE_XID2INITX: |
| 2016 | if (grp->outstanding_xid2 == 0) { |
| 2017 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITW); |
| 2018 | mpc_validate_xid(mpcginfo); |
| 2019 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); |
| 2020 | } |
| 2021 | break; |
| 2022 | case MPCG_STATE_XID0IOWAIX: |
| 2023 | if (grp->outstanding_xid2 == 0) { |
| 2024 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITI); |
| 2025 | mpc_validate_xid(mpcginfo); |
| 2026 | fsm_event(grp->fsm, MPCG_EVENT_XID2DONE, dev); |
| 2027 | } |
| 2028 | break; |
| 2029 | } |
| 2030 | kfree(mpcginfo); |
| 2031 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2032 | CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n", |
| 2033 | __func__, ch->id, grp->outstanding_xid2, |
| 2034 | grp->outstanding_xid7, grp->outstanding_xid7_p2); |
| 2035 | CTCM_PR_DEBUG("ctcmpc:%s() %s grpstate: %s chanstate: %s \n", |
| 2036 | __func__, ch->id, |
| 2037 | fsm_getstate_str(grp->fsm), fsm_getstate_str(ch->fsm)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2038 | return; |
| 2039 | |
| 2040 | } |
| 2041 | |
| 2042 | |
| 2043 | /* |
| 2044 | * MPC Group Station FSM action |
| 2045 | * CTCM_PROTO_MPC only |
| 2046 | */ |
| 2047 | static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) |
| 2048 | { |
| 2049 | struct mpcg_info *mpcginfo = arg; |
| 2050 | struct channel *ch = mpcginfo->ch; |
| 2051 | struct net_device *dev = ch->netdev; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2052 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2053 | struct mpc_group *grp = priv->mpcg; |
| 2054 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2055 | CTCM_PR_DEBUG("Enter %s: cp=%i ch=0x%p id=%s\n", |
| 2056 | __func__, smp_processor_id(), ch, ch->id); |
| 2057 | CTCM_PR_DEBUG("%s: outstanding_xid7: %i, outstanding_xid7_p2: %i\n", |
| 2058 | __func__, grp->outstanding_xid7, grp->outstanding_xid7_p2); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2059 | |
| 2060 | grp->outstanding_xid7--; |
| 2061 | ch->xid_skb->data = ch->xid_skb_data; |
| 2062 | skb_reset_tail_pointer(ch->xid_skb); |
| 2063 | ch->xid_skb->len = 0; |
| 2064 | |
| 2065 | switch (fsm_getstate(grp->fsm)) { |
| 2066 | case MPCG_STATE_XID7INITI: |
| 2067 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITZ); |
| 2068 | mpc_validate_xid(mpcginfo); |
| 2069 | break; |
| 2070 | case MPCG_STATE_XID7INITW: |
| 2071 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITX); |
| 2072 | mpc_validate_xid(mpcginfo); |
| 2073 | break; |
| 2074 | case MPCG_STATE_XID7INITZ: |
| 2075 | case MPCG_STATE_XID7INITX: |
| 2076 | if (grp->outstanding_xid7 == 0) { |
| 2077 | if (grp->outstanding_xid7_p2 > 0) { |
| 2078 | grp->outstanding_xid7 = |
| 2079 | grp->outstanding_xid7_p2; |
| 2080 | grp->outstanding_xid7_p2 = 0; |
| 2081 | } else |
| 2082 | fsm_newstate(grp->fsm, MPCG_STATE_XID7INITF); |
| 2083 | |
| 2084 | mpc_validate_xid(mpcginfo); |
| 2085 | fsm_event(grp->fsm, MPCG_EVENT_XID7DONE, dev); |
| 2086 | break; |
| 2087 | } |
| 2088 | mpc_validate_xid(mpcginfo); |
| 2089 | break; |
| 2090 | } |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2091 | kfree(mpcginfo); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2092 | return; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2093 | } |
| 2094 | |
| 2095 | /* |
| 2096 | * mpc_action helper of an MPC Group Station FSM action |
| 2097 | * CTCM_PROTO_MPC only |
| 2098 | */ |
| 2099 | static int mpc_send_qllc_discontact(struct net_device *dev) |
| 2100 | { |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2101 | __u32 new_len = 0; |
| 2102 | struct sk_buff *skb; |
| 2103 | struct qllc *qllcptr; |
Peter Tiedemann | 261893d | 2008-08-21 17:10:24 +0200 | [diff] [blame] | 2104 | struct ctcm_priv *priv = dev->ml_priv; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2105 | struct mpc_group *grp = priv->mpcg; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2106 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2107 | CTCM_PR_DEBUG("%s: GROUP STATE: %s\n", |
| 2108 | __func__, mpcg_state_names[grp->saved_state]); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2109 | |
| 2110 | switch (grp->saved_state) { |
| 2111 | /* |
| 2112 | * establish conn callback function is |
| 2113 | * preferred method to report failure |
| 2114 | */ |
| 2115 | case MPCG_STATE_XID0IOWAIT: |
| 2116 | case MPCG_STATE_XID0IOWAIX: |
| 2117 | case MPCG_STATE_XID7INITI: |
| 2118 | case MPCG_STATE_XID7INITZ: |
| 2119 | case MPCG_STATE_XID2INITW: |
| 2120 | case MPCG_STATE_XID2INITX: |
| 2121 | case MPCG_STATE_XID7INITW: |
| 2122 | case MPCG_STATE_XID7INITX: |
| 2123 | if (grp->estconnfunc) { |
| 2124 | grp->estconnfunc(grp->port_num, -1, 0); |
| 2125 | grp->estconnfunc = NULL; |
| 2126 | break; |
| 2127 | } |
| 2128 | case MPCG_STATE_FLOWC: |
| 2129 | case MPCG_STATE_READY: |
| 2130 | grp->send_qllc_disc = 2; |
| 2131 | new_len = sizeof(struct qllc); |
| 2132 | qllcptr = kzalloc(new_len, gfp_type() | GFP_DMA); |
| 2133 | if (qllcptr == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2134 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2135 | "%s(%s): qllcptr allocation error", |
| 2136 | CTCM_FUNTAIL, dev->name); |
| 2137 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2138 | } |
| 2139 | |
| 2140 | qllcptr->qllc_address = 0xcc; |
| 2141 | qllcptr->qllc_commands = 0x03; |
| 2142 | |
| 2143 | skb = __dev_alloc_skb(new_len, GFP_ATOMIC); |
| 2144 | |
| 2145 | if (skb == NULL) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2146 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2147 | "%s(%s): skb allocation error", |
| 2148 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2149 | priv->stats.rx_dropped++; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2150 | kfree(qllcptr); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2151 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2152 | } |
| 2153 | |
| 2154 | memcpy(skb_put(skb, new_len), qllcptr, new_len); |
| 2155 | kfree(qllcptr); |
| 2156 | |
| 2157 | if (skb_headroom(skb) < 4) { |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2158 | CTCM_DBF_TEXT_(MPC_ERROR, CTC_DBF_ERROR, |
| 2159 | "%s(%s): skb_headroom error", |
| 2160 | CTCM_FUNTAIL, dev->name); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2161 | dev_kfree_skb_any(skb); |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2162 | return -ENOMEM; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2163 | } |
| 2164 | |
| 2165 | *((__u32 *)skb_push(skb, 4)) = priv->channel[READ]->pdu_seq; |
| 2166 | priv->channel[READ]->pdu_seq++; |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2167 | CTCM_PR_DBGDATA("ctcmpc: %s ToDCM_pdu_seq= %08x\n", |
| 2168 | __func__, priv->channel[READ]->pdu_seq); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2169 | |
| 2170 | /* receipt of CC03 resets anticipated sequence number on |
| 2171 | receiving side */ |
| 2172 | priv->channel[READ]->pdu_seq = 0x00; |
| 2173 | skb_reset_mac_header(skb); |
| 2174 | skb->dev = dev; |
| 2175 | skb->protocol = htons(ETH_P_SNAP); |
| 2176 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2177 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2178 | CTCM_D3_DUMP(skb->data, (sizeof(struct qllc) + 4)); |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2179 | |
| 2180 | netif_rx(skb); |
| 2181 | break; |
| 2182 | default: |
| 2183 | break; |
| 2184 | |
| 2185 | } |
| 2186 | |
Peter Tiedemann | aa3f2cb | 2008-07-18 15:24:57 +0200 | [diff] [blame] | 2187 | return 0; |
Peter Tiedemann | 293d984 | 2008-02-08 00:03:49 +0100 | [diff] [blame] | 2188 | } |
| 2189 | /* --- This is the END my friend --- */ |
| 2190 | |