1 /* 2 * drivers/s390/net/qeth_l2_main.c 3 * 4 * Copyright IBM Corp. 2007, 2009 5 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, 6 * Frank Pavlic <fpavlic@de.ibm.com>, 7 * Thomas Spatzier <tspat@de.ibm.com>, 8 * Frank Blaschka <frank.blaschka@de.ibm.com> 9 */ 10 11 #define KMSG_COMPONENT "qeth" 12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/string.h> 17 #include <linux/errno.h> 18 #include <linux/kernel.h> 19 #include <linux/slab.h> 20 #include <linux/etherdevice.h> 21 #include <linux/mii.h> 22 #include <linux/ip.h> 23 #include <linux/list.h> 24 25 #include "qeth_core.h" 26 27 static int qeth_l2_set_offline(struct ccwgroup_device *); 28 static int qeth_l2_stop(struct net_device *); 29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *); 30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *, 31 enum qeth_ipa_cmds, 32 int (*reply_cb) (struct qeth_card *, 33 struct qeth_reply*, 34 unsigned long)); 35 static void qeth_l2_set_multicast_list(struct net_device *); 36 static int qeth_l2_recover(void *); 37 38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 39 { 40 struct qeth_card *card = dev->ml_priv; 41 struct mii_ioctl_data *mii_data; 42 int rc = 0; 43 44 if (!card) 45 return -ENODEV; 46 47 if ((card->state != CARD_STATE_UP) && 48 (card->state != CARD_STATE_SOFTSETUP)) 49 return -ENODEV; 50 51 if (card->info.type == QETH_CARD_TYPE_OSN) 52 return -EPERM; 53 54 switch (cmd) { 55 case SIOC_QETH_ADP_SET_SNMP_CONTROL: 56 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data); 57 break; 58 case SIOC_QETH_GET_CARD_TYPE: 59 if ((card->info.type == QETH_CARD_TYPE_OSD || 60 card->info.type == QETH_CARD_TYPE_OSM || 61 card->info.type == QETH_CARD_TYPE_OSX) && 62 !card->info.guestlan) 63 return 1; 64 return 0; 65 break; 66 case SIOCGMIIPHY: 67 mii_data = if_mii(rq); 68 mii_data->phy_id = 0; 69 break; 70 case SIOCGMIIREG: 71 mii_data = if_mii(rq); 72 if (mii_data->phy_id != 0) 73 rc = -EINVAL; 74 else 75 mii_data->val_out = qeth_mdio_read(dev, 76 mii_data->phy_id, mii_data->reg_num); 77 break; 78 case SIOC_QETH_QUERY_OAT: 79 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data); 80 break; 81 default: 82 rc = -EOPNOTSUPP; 83 } 84 if (rc) 85 QETH_CARD_TEXT_(card, 2, "ioce%d", rc); 86 return rc; 87 } 88 89 static int qeth_l2_verify_dev(struct net_device *dev) 90 { 91 struct qeth_card *card; 92 unsigned long flags; 93 int rc = 0; 94 95 read_lock_irqsave(&qeth_core_card_list.rwlock, flags); 96 list_for_each_entry(card, &qeth_core_card_list.list, list) { 97 if (card->dev == dev) { 98 rc = QETH_REAL_CARD; 99 break; 100 } 101 } 102 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); 103 104 return rc; 105 } 106 107 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no) 108 { 109 struct qeth_card *card; 110 struct net_device *ndev; 111 __u16 temp_dev_no; 112 unsigned long flags; 113 struct ccw_dev_id read_devid; 114 115 ndev = NULL; 116 memcpy(&temp_dev_no, read_dev_no, 2); 117 read_lock_irqsave(&qeth_core_card_list.rwlock, flags); 118 list_for_each_entry(card, &qeth_core_card_list.list, list) { 119 ccw_device_get_id(CARD_RDEV(card), &read_devid); 120 if (read_devid.devno == temp_dev_no) { 121 ndev = card->dev; 122 break; 123 } 124 } 125 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); 126 return ndev; 127 } 128 129 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card, 130 struct qeth_reply *reply, 131 unsigned long data) 132 { 133 struct qeth_ipa_cmd *cmd; 134 __u8 *mac; 135 136 QETH_CARD_TEXT(card, 2, "L2Sgmacb"); 137 cmd = (struct qeth_ipa_cmd *) data; 138 mac = &cmd->data.setdelmac.mac[0]; 139 /* MAC already registered, needed in couple/uncouple case */ 140 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) { 141 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n", 142 mac, QETH_CARD_IFNAME(card)); 143 cmd->hdr.return_code = 0; 144 } 145 if (cmd->hdr.return_code) 146 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n", 147 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code); 148 return 0; 149 } 150 151 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac) 152 { 153 QETH_CARD_TEXT(card, 2, "L2Sgmac"); 154 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC, 155 qeth_l2_send_setgroupmac_cb); 156 } 157 158 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card, 159 struct qeth_reply *reply, 160 unsigned long data) 161 { 162 struct qeth_ipa_cmd *cmd; 163 __u8 *mac; 164 165 QETH_CARD_TEXT(card, 2, "L2Dgmacb"); 166 cmd = (struct qeth_ipa_cmd *) data; 167 mac = &cmd->data.setdelmac.mac[0]; 168 if (cmd->hdr.return_code) 169 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n", 170 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code); 171 return 0; 172 } 173 174 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac) 175 { 176 QETH_CARD_TEXT(card, 2, "L2Dgmac"); 177 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC, 178 qeth_l2_send_delgroupmac_cb); 179 } 180 181 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac) 182 { 183 struct qeth_mc_mac *mc; 184 int rc; 185 186 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC); 187 188 if (!mc) 189 return; 190 191 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN); 192 mc->mc_addrlen = OSA_ADDR_LEN; 193 mc->is_vmac = vmac; 194 195 if (vmac) { 196 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC, 197 NULL); 198 } else { 199 rc = qeth_l2_send_setgroupmac(card, mac); 200 } 201 202 if (!rc) 203 list_add_tail(&mc->list, &card->mc_list); 204 else 205 kfree(mc); 206 } 207 208 static void qeth_l2_del_all_mc(struct qeth_card *card, int del) 209 { 210 struct qeth_mc_mac *mc, *tmp; 211 212 spin_lock_bh(&card->mclock); 213 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) { 214 if (del) { 215 if (mc->is_vmac) 216 qeth_l2_send_setdelmac(card, mc->mc_addr, 217 IPA_CMD_DELVMAC, NULL); 218 else 219 qeth_l2_send_delgroupmac(card, mc->mc_addr); 220 } 221 list_del(&mc->list); 222 kfree(mc); 223 } 224 spin_unlock_bh(&card->mclock); 225 } 226 227 static inline int qeth_l2_get_cast_type(struct qeth_card *card, 228 struct sk_buff *skb) 229 { 230 if (card->info.type == QETH_CARD_TYPE_OSN) 231 return RTN_UNSPEC; 232 if (is_broadcast_ether_addr(skb->data)) 233 return RTN_BROADCAST; 234 if (is_multicast_ether_addr(skb->data)) 235 return RTN_MULTICAST; 236 return RTN_UNSPEC; 237 } 238 239 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, 240 struct sk_buff *skb, int ipv, int cast_type) 241 { 242 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb); 243 244 memset(hdr, 0, sizeof(struct qeth_hdr)); 245 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2; 246 247 /* set byte byte 3 to casting flags */ 248 if (cast_type == RTN_MULTICAST) 249 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; 250 else if (cast_type == RTN_BROADCAST) 251 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST; 252 else 253 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST; 254 255 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE; 256 /* VSWITCH relies on the VLAN 257 * information to be present in 258 * the QDIO header */ 259 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) { 260 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN; 261 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI); 262 } 263 } 264 265 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card, 266 struct qeth_reply *reply, unsigned long data) 267 { 268 struct qeth_ipa_cmd *cmd; 269 270 QETH_CARD_TEXT(card, 2, "L2sdvcb"); 271 cmd = (struct qeth_ipa_cmd *) data; 272 if (cmd->hdr.return_code) { 273 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. " 274 "Continuing\n", cmd->data.setdelvlan.vlan_id, 275 QETH_CARD_IFNAME(card), cmd->hdr.return_code); 276 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command); 277 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code); 278 } 279 return 0; 280 } 281 282 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i, 283 enum qeth_ipa_cmds ipacmd) 284 { 285 struct qeth_ipa_cmd *cmd; 286 struct qeth_cmd_buffer *iob; 287 288 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd); 289 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); 290 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); 291 cmd->data.setdelvlan.vlan_id = i; 292 return qeth_send_ipa_cmd(card, iob, 293 qeth_l2_send_setdelvlan_cb, NULL); 294 } 295 296 static void qeth_l2_process_vlans(struct qeth_card *card) 297 { 298 struct qeth_vlan_vid *id; 299 QETH_CARD_TEXT(card, 3, "L2prcvln"); 300 spin_lock_bh(&card->vlanlock); 301 list_for_each_entry(id, &card->vid_list, list) { 302 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN); 303 } 304 spin_unlock_bh(&card->vlanlock); 305 } 306 307 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 308 { 309 struct qeth_card *card = dev->ml_priv; 310 struct qeth_vlan_vid *id; 311 312 QETH_CARD_TEXT_(card, 4, "aid:%d", vid); 313 if (!vid) 314 return 0; 315 if (card->info.type == QETH_CARD_TYPE_OSM) { 316 QETH_CARD_TEXT(card, 3, "aidOSM"); 317 return 0; 318 } 319 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 320 QETH_CARD_TEXT(card, 3, "aidREC"); 321 return 0; 322 } 323 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC); 324 if (id) { 325 id->vid = vid; 326 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN); 327 spin_lock_bh(&card->vlanlock); 328 list_add_tail(&id->list, &card->vid_list); 329 spin_unlock_bh(&card->vlanlock); 330 } else { 331 return -ENOMEM; 332 } 333 return 0; 334 } 335 336 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 337 { 338 struct qeth_vlan_vid *id, *tmpid = NULL; 339 struct qeth_card *card = dev->ml_priv; 340 341 QETH_CARD_TEXT_(card, 4, "kid:%d", vid); 342 if (card->info.type == QETH_CARD_TYPE_OSM) { 343 QETH_CARD_TEXT(card, 3, "kidOSM"); 344 return 0; 345 } 346 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 347 QETH_CARD_TEXT(card, 3, "kidREC"); 348 return 0; 349 } 350 spin_lock_bh(&card->vlanlock); 351 list_for_each_entry(id, &card->vid_list, list) { 352 if (id->vid == vid) { 353 list_del(&id->list); 354 tmpid = id; 355 break; 356 } 357 } 358 spin_unlock_bh(&card->vlanlock); 359 if (tmpid) { 360 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN); 361 kfree(tmpid); 362 } 363 qeth_l2_set_multicast_list(card->dev); 364 return 0; 365 } 366 367 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) 368 { 369 int rc = 0; 370 371 QETH_DBF_TEXT(SETUP , 2, "stopcard"); 372 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 373 374 qeth_set_allowed_threads(card, 0, 1); 375 if (card->read.state == CH_STATE_UP && 376 card->write.state == CH_STATE_UP && 377 (card->state == CARD_STATE_UP)) { 378 if (recovery_mode && 379 card->info.type != QETH_CARD_TYPE_OSN) { 380 qeth_l2_stop(card->dev); 381 } else { 382 rtnl_lock(); 383 dev_close(card->dev); 384 rtnl_unlock(); 385 } 386 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 387 card->state = CARD_STATE_SOFTSETUP; 388 } 389 if (card->state == CARD_STATE_SOFTSETUP) { 390 qeth_l2_del_all_mc(card, 0); 391 qeth_clear_ipacmd_list(card); 392 card->state = CARD_STATE_HARDSETUP; 393 } 394 if (card->state == CARD_STATE_HARDSETUP) { 395 qeth_qdio_clear_card(card, 0); 396 qeth_clear_qdio_buffers(card); 397 qeth_clear_working_pool_list(card); 398 card->state = CARD_STATE_DOWN; 399 } 400 if (card->state == CARD_STATE_DOWN) { 401 qeth_clear_cmd_buffers(&card->read); 402 qeth_clear_cmd_buffers(&card->write); 403 } 404 return rc; 405 } 406 407 static int qeth_l2_process_inbound_buffer(struct qeth_card *card, 408 int budget, int *done) 409 { 410 int work_done = 0; 411 struct sk_buff *skb; 412 struct qeth_hdr *hdr; 413 unsigned int len; 414 415 *done = 0; 416 BUG_ON(!budget); 417 while (budget) { 418 skb = qeth_core_get_next_skb(card, 419 &card->qdio.in_q->bufs[card->rx.b_index], 420 &card->rx.b_element, &card->rx.e_offset, &hdr); 421 if (!skb) { 422 *done = 1; 423 break; 424 } 425 skb->dev = card->dev; 426 switch (hdr->hdr.l2.id) { 427 case QETH_HEADER_TYPE_LAYER2: 428 skb->pkt_type = PACKET_HOST; 429 skb->protocol = eth_type_trans(skb, skb->dev); 430 skb->ip_summed = CHECKSUM_NONE; 431 if (skb->protocol == htons(ETH_P_802_2)) 432 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno; 433 len = skb->len; 434 netif_receive_skb(skb); 435 break; 436 case QETH_HEADER_TYPE_OSN: 437 if (card->info.type == QETH_CARD_TYPE_OSN) { 438 skb_push(skb, sizeof(struct qeth_hdr)); 439 skb_copy_to_linear_data(skb, hdr, 440 sizeof(struct qeth_hdr)); 441 len = skb->len; 442 card->osn_info.data_cb(skb); 443 break; 444 } 445 /* else unknown */ 446 default: 447 dev_kfree_skb_any(skb); 448 QETH_CARD_TEXT(card, 3, "inbunkno"); 449 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN); 450 continue; 451 } 452 work_done++; 453 budget--; 454 card->stats.rx_packets++; 455 card->stats.rx_bytes += len; 456 } 457 return work_done; 458 } 459 460 static int qeth_l2_poll(struct napi_struct *napi, int budget) 461 { 462 struct qeth_card *card = container_of(napi, struct qeth_card, napi); 463 int work_done = 0; 464 struct qeth_qdio_buffer *buffer; 465 int done; 466 int new_budget = budget; 467 468 if (card->options.performance_stats) { 469 card->perf_stats.inbound_cnt++; 470 card->perf_stats.inbound_start_time = qeth_get_micros(); 471 } 472 473 while (1) { 474 if (!card->rx.b_count) { 475 card->rx.qdio_err = 0; 476 card->rx.b_count = qdio_get_next_buffers( 477 card->data.ccwdev, 0, &card->rx.b_index, 478 &card->rx.qdio_err); 479 if (card->rx.b_count <= 0) { 480 card->rx.b_count = 0; 481 break; 482 } 483 card->rx.b_element = 484 &card->qdio.in_q->bufs[card->rx.b_index] 485 .buffer->element[0]; 486 card->rx.e_offset = 0; 487 } 488 489 while (card->rx.b_count) { 490 buffer = &card->qdio.in_q->bufs[card->rx.b_index]; 491 if (!(card->rx.qdio_err && 492 qeth_check_qdio_errors(card, buffer->buffer, 493 card->rx.qdio_err, "qinerr"))) 494 work_done += qeth_l2_process_inbound_buffer( 495 card, new_budget, &done); 496 else 497 done = 1; 498 499 if (done) { 500 if (card->options.performance_stats) 501 card->perf_stats.bufs_rec++; 502 qeth_put_buffer_pool_entry(card, 503 buffer->pool_entry); 504 qeth_queue_input_buffer(card, card->rx.b_index); 505 card->rx.b_count--; 506 if (card->rx.b_count) { 507 card->rx.b_index = 508 (card->rx.b_index + 1) % 509 QDIO_MAX_BUFFERS_PER_Q; 510 card->rx.b_element = 511 &card->qdio.in_q 512 ->bufs[card->rx.b_index] 513 .buffer->element[0]; 514 card->rx.e_offset = 0; 515 } 516 } 517 518 if (work_done >= budget) 519 goto out; 520 else 521 new_budget = budget - work_done; 522 } 523 } 524 525 napi_complete(napi); 526 if (qdio_start_irq(card->data.ccwdev, 0)) 527 napi_schedule(&card->napi); 528 out: 529 if (card->options.performance_stats) 530 card->perf_stats.inbound_time += qeth_get_micros() - 531 card->perf_stats.inbound_start_time; 532 return work_done; 533 } 534 535 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac, 536 enum qeth_ipa_cmds ipacmd, 537 int (*reply_cb) (struct qeth_card *, 538 struct qeth_reply*, 539 unsigned long)) 540 { 541 struct qeth_ipa_cmd *cmd; 542 struct qeth_cmd_buffer *iob; 543 544 QETH_CARD_TEXT(card, 2, "L2sdmac"); 545 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); 546 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); 547 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN; 548 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN); 549 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL); 550 } 551 552 static int qeth_l2_send_setmac_cb(struct qeth_card *card, 553 struct qeth_reply *reply, 554 unsigned long data) 555 { 556 struct qeth_ipa_cmd *cmd; 557 558 QETH_CARD_TEXT(card, 2, "L2Smaccb"); 559 cmd = (struct qeth_ipa_cmd *) data; 560 if (cmd->hdr.return_code) { 561 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code); 562 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 563 switch (cmd->hdr.return_code) { 564 case IPA_RC_L2_DUP_MAC: 565 case IPA_RC_L2_DUP_LAYER3_MAC: 566 dev_warn(&card->gdev->dev, 567 "MAC address %pM already exists\n", 568 cmd->data.setdelmac.mac); 569 break; 570 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP: 571 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP: 572 dev_warn(&card->gdev->dev, 573 "MAC address %pM is not authorized\n", 574 cmd->data.setdelmac.mac); 575 break; 576 default: 577 break; 578 } 579 } else { 580 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; 581 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac, 582 OSA_ADDR_LEN); 583 dev_info(&card->gdev->dev, 584 "MAC address %pM successfully registered on device %s\n", 585 card->dev->dev_addr, card->dev->name); 586 } 587 return 0; 588 } 589 590 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac) 591 { 592 QETH_CARD_TEXT(card, 2, "L2Setmac"); 593 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC, 594 qeth_l2_send_setmac_cb); 595 } 596 597 static int qeth_l2_send_delmac_cb(struct qeth_card *card, 598 struct qeth_reply *reply, 599 unsigned long data) 600 { 601 struct qeth_ipa_cmd *cmd; 602 603 QETH_CARD_TEXT(card, 2, "L2Dmaccb"); 604 cmd = (struct qeth_ipa_cmd *) data; 605 if (cmd->hdr.return_code) { 606 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code); 607 return 0; 608 } 609 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 610 611 return 0; 612 } 613 614 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac) 615 { 616 QETH_CARD_TEXT(card, 2, "L2Delmac"); 617 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)) 618 return 0; 619 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC, 620 qeth_l2_send_delmac_cb); 621 } 622 623 static int qeth_l2_request_initial_mac(struct qeth_card *card) 624 { 625 int rc = 0; 626 char vendor_pre[] = {0x02, 0x00, 0x00}; 627 628 QETH_DBF_TEXT(SETUP, 2, "doL2init"); 629 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card)); 630 631 rc = qeth_query_setadapterparms(card); 632 if (rc) { 633 QETH_DBF_MESSAGE(2, "could not query adapter parameters on " 634 "device %s: x%x\n", CARD_BUS_ID(card), rc); 635 } 636 637 if (card->info.type == QETH_CARD_TYPE_IQD || 638 card->info.type == QETH_CARD_TYPE_OSM || 639 card->info.type == QETH_CARD_TYPE_OSX || 640 card->info.guestlan) { 641 rc = qeth_setadpparms_change_macaddr(card); 642 if (rc) { 643 QETH_DBF_MESSAGE(2, "couldn't get MAC address on " 644 "device %s: x%x\n", CARD_BUS_ID(card), rc); 645 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 646 return rc; 647 } 648 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN); 649 } else { 650 random_ether_addr(card->dev->dev_addr); 651 memcpy(card->dev->dev_addr, vendor_pre, 3); 652 } 653 return 0; 654 } 655 656 static int qeth_l2_set_mac_address(struct net_device *dev, void *p) 657 { 658 struct sockaddr *addr = p; 659 struct qeth_card *card = dev->ml_priv; 660 int rc = 0; 661 662 QETH_CARD_TEXT(card, 3, "setmac"); 663 664 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) { 665 QETH_CARD_TEXT(card, 3, "setmcINV"); 666 return -EOPNOTSUPP; 667 } 668 669 if (card->info.type == QETH_CARD_TYPE_OSN || 670 card->info.type == QETH_CARD_TYPE_OSM || 671 card->info.type == QETH_CARD_TYPE_OSX) { 672 QETH_CARD_TEXT(card, 3, "setmcTYP"); 673 return -EOPNOTSUPP; 674 } 675 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN); 676 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 677 QETH_CARD_TEXT(card, 3, "setmcREC"); 678 return -ERESTARTSYS; 679 } 680 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]); 681 if (!rc) 682 rc = qeth_l2_send_setmac(card, addr->sa_data); 683 return rc ? -EINVAL : 0; 684 } 685 686 static void qeth_l2_set_multicast_list(struct net_device *dev) 687 { 688 struct qeth_card *card = dev->ml_priv; 689 struct netdev_hw_addr *ha; 690 691 if (card->info.type == QETH_CARD_TYPE_OSN) 692 return ; 693 694 QETH_CARD_TEXT(card, 3, "setmulti"); 695 if (qeth_threads_running(card, QETH_RECOVER_THREAD) && 696 (card->state != CARD_STATE_UP)) 697 return; 698 qeth_l2_del_all_mc(card, 1); 699 spin_lock_bh(&card->mclock); 700 netdev_for_each_mc_addr(ha, dev) 701 qeth_l2_add_mc(card, ha->addr, 0); 702 703 netdev_for_each_uc_addr(ha, dev) 704 qeth_l2_add_mc(card, ha->addr, 1); 705 706 spin_unlock_bh(&card->mclock); 707 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) 708 return; 709 qeth_setadp_promisc_mode(card); 710 } 711 712 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 713 { 714 int rc; 715 struct qeth_hdr *hdr = NULL; 716 int elements = 0; 717 struct qeth_card *card = dev->ml_priv; 718 struct sk_buff *new_skb = skb; 719 int ipv = qeth_get_ip_version(skb); 720 int cast_type = qeth_l2_get_cast_type(card, skb); 721 struct qeth_qdio_out_q *queue = card->qdio.out_qs 722 [qeth_get_priority_queue(card, skb, ipv, cast_type)]; 723 int tx_bytes = skb->len; 724 int data_offset = -1; 725 int elements_needed = 0; 726 int hd_len = 0; 727 728 if ((card->state != CARD_STATE_UP) || !card->lan_online) { 729 card->stats.tx_carrier_errors++; 730 goto tx_drop; 731 } 732 733 if ((card->info.type == QETH_CARD_TYPE_OSN) && 734 (skb->protocol == htons(ETH_P_IPV6))) 735 goto tx_drop; 736 737 if (card->options.performance_stats) { 738 card->perf_stats.outbound_cnt++; 739 card->perf_stats.outbound_start_time = qeth_get_micros(); 740 } 741 netif_stop_queue(dev); 742 743 if (card->info.type == QETH_CARD_TYPE_OSN) 744 hdr = (struct qeth_hdr *)skb->data; 745 else { 746 if (card->info.type == QETH_CARD_TYPE_IQD) { 747 new_skb = skb; 748 data_offset = ETH_HLEN; 749 hd_len = ETH_HLEN; 750 hdr = kmem_cache_alloc(qeth_core_header_cache, 751 GFP_ATOMIC); 752 if (!hdr) 753 goto tx_drop; 754 elements_needed++; 755 skb_reset_mac_header(new_skb); 756 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type); 757 hdr->hdr.l2.pkt_length = new_skb->len; 758 memcpy(((char *)hdr) + sizeof(struct qeth_hdr), 759 skb_mac_header(new_skb), ETH_HLEN); 760 } else { 761 /* create a clone with writeable headroom */ 762 new_skb = skb_realloc_headroom(skb, 763 sizeof(struct qeth_hdr)); 764 if (!new_skb) 765 goto tx_drop; 766 hdr = (struct qeth_hdr *)skb_push(new_skb, 767 sizeof(struct qeth_hdr)); 768 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr)); 769 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type); 770 } 771 } 772 773 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 774 elements_needed); 775 if (!elements) { 776 if (data_offset >= 0) 777 kmem_cache_free(qeth_core_header_cache, hdr); 778 goto tx_drop; 779 } 780 781 if (card->info.type != QETH_CARD_TYPE_IQD) { 782 if (qeth_hdr_chk_and_bounce(new_skb, 783 sizeof(struct qeth_hdr_layer2))) 784 goto tx_drop; 785 rc = qeth_do_send_packet(card, queue, new_skb, hdr, 786 elements); 787 } else 788 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr, 789 elements, data_offset, hd_len); 790 if (!rc) { 791 card->stats.tx_packets++; 792 card->stats.tx_bytes += tx_bytes; 793 if (new_skb != skb) 794 dev_kfree_skb_any(skb); 795 rc = NETDEV_TX_OK; 796 } else { 797 if (data_offset >= 0) 798 kmem_cache_free(qeth_core_header_cache, hdr); 799 800 if (rc == -EBUSY) { 801 if (new_skb != skb) 802 dev_kfree_skb_any(new_skb); 803 return NETDEV_TX_BUSY; 804 } else 805 goto tx_drop; 806 } 807 808 netif_wake_queue(dev); 809 if (card->options.performance_stats) 810 card->perf_stats.outbound_time += qeth_get_micros() - 811 card->perf_stats.outbound_start_time; 812 return rc; 813 814 tx_drop: 815 card->stats.tx_dropped++; 816 card->stats.tx_errors++; 817 if ((new_skb != skb) && new_skb) 818 dev_kfree_skb_any(new_skb); 819 dev_kfree_skb_any(skb); 820 netif_wake_queue(dev); 821 return NETDEV_TX_OK; 822 } 823 824 static int __qeth_l2_open(struct net_device *dev) 825 { 826 struct qeth_card *card = dev->ml_priv; 827 int rc = 0; 828 829 QETH_CARD_TEXT(card, 4, "qethopen"); 830 if (card->state == CARD_STATE_UP) 831 return rc; 832 if (card->state != CARD_STATE_SOFTSETUP) 833 return -ENODEV; 834 835 if ((card->info.type != QETH_CARD_TYPE_OSN) && 836 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) { 837 QETH_CARD_TEXT(card, 4, "nomacadr"); 838 return -EPERM; 839 } 840 card->data.state = CH_STATE_UP; 841 card->state = CARD_STATE_UP; 842 netif_start_queue(dev); 843 844 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) { 845 napi_enable(&card->napi); 846 napi_schedule(&card->napi); 847 } else 848 rc = -EIO; 849 return rc; 850 } 851 852 static int qeth_l2_open(struct net_device *dev) 853 { 854 struct qeth_card *card = dev->ml_priv; 855 856 QETH_CARD_TEXT(card, 5, "qethope_"); 857 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 858 QETH_CARD_TEXT(card, 3, "openREC"); 859 return -ERESTARTSYS; 860 } 861 return __qeth_l2_open(dev); 862 } 863 864 static int qeth_l2_stop(struct net_device *dev) 865 { 866 struct qeth_card *card = dev->ml_priv; 867 868 QETH_CARD_TEXT(card, 4, "qethstop"); 869 netif_tx_disable(dev); 870 if (card->state == CARD_STATE_UP) { 871 card->state = CARD_STATE_SOFTSETUP; 872 napi_disable(&card->napi); 873 } 874 return 0; 875 } 876 877 static int qeth_l2_probe_device(struct ccwgroup_device *gdev) 878 { 879 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 880 881 INIT_LIST_HEAD(&card->vid_list); 882 INIT_LIST_HEAD(&card->mc_list); 883 card->options.layer2 = 1; 884 card->info.hwtrap = 0; 885 return 0; 886 } 887 888 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) 889 { 890 struct qeth_card *card = dev_get_drvdata(&cgdev->dev); 891 892 qeth_set_allowed_threads(card, 0, 1); 893 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); 894 895 if (cgdev->state == CCWGROUP_ONLINE) 896 qeth_l2_set_offline(cgdev); 897 898 if (card->dev) { 899 unregister_netdev(card->dev); 900 card->dev = NULL; 901 } 902 return; 903 } 904 905 static const struct ethtool_ops qeth_l2_ethtool_ops = { 906 .get_link = ethtool_op_get_link, 907 .get_strings = qeth_core_get_strings, 908 .get_ethtool_stats = qeth_core_get_ethtool_stats, 909 .get_sset_count = qeth_core_get_sset_count, 910 .get_drvinfo = qeth_core_get_drvinfo, 911 .get_settings = qeth_core_ethtool_get_settings, 912 }; 913 914 static const struct ethtool_ops qeth_l2_osn_ops = { 915 .get_strings = qeth_core_get_strings, 916 .get_ethtool_stats = qeth_core_get_ethtool_stats, 917 .get_sset_count = qeth_core_get_sset_count, 918 .get_drvinfo = qeth_core_get_drvinfo, 919 }; 920 921 static const struct net_device_ops qeth_l2_netdev_ops = { 922 .ndo_open = qeth_l2_open, 923 .ndo_stop = qeth_l2_stop, 924 .ndo_get_stats = qeth_get_stats, 925 .ndo_start_xmit = qeth_l2_hard_start_xmit, 926 .ndo_validate_addr = eth_validate_addr, 927 .ndo_set_rx_mode = qeth_l2_set_multicast_list, 928 .ndo_do_ioctl = qeth_l2_do_ioctl, 929 .ndo_set_mac_address = qeth_l2_set_mac_address, 930 .ndo_change_mtu = qeth_change_mtu, 931 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid, 932 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid, 933 .ndo_tx_timeout = qeth_tx_timeout, 934 }; 935 936 static int qeth_l2_setup_netdev(struct qeth_card *card) 937 { 938 switch (card->info.type) { 939 case QETH_CARD_TYPE_IQD: 940 card->dev = alloc_netdev(0, "hsi%d", ether_setup); 941 break; 942 case QETH_CARD_TYPE_OSN: 943 card->dev = alloc_netdev(0, "osn%d", ether_setup); 944 card->dev->flags |= IFF_NOARP; 945 break; 946 default: 947 card->dev = alloc_etherdev(0); 948 } 949 950 if (!card->dev) 951 return -ENODEV; 952 953 card->dev->ml_priv = card; 954 card->dev->watchdog_timeo = QETH_TX_TIMEOUT; 955 card->dev->mtu = card->info.initial_mtu; 956 card->dev->netdev_ops = &qeth_l2_netdev_ops; 957 if (card->info.type != QETH_CARD_TYPE_OSN) 958 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops); 959 else 960 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops); 961 card->dev->features |= NETIF_F_HW_VLAN_FILTER; 962 card->info.broadcast_capable = 1; 963 qeth_l2_request_initial_mac(card); 964 SET_NETDEV_DEV(card->dev, &card->gdev->dev); 965 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT); 966 return register_netdev(card->dev); 967 } 968 969 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) 970 { 971 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 972 int rc = 0; 973 enum qeth_card_states recover_flag; 974 975 BUG_ON(!card); 976 mutex_lock(&card->discipline_mutex); 977 mutex_lock(&card->conf_mutex); 978 QETH_DBF_TEXT(SETUP, 2, "setonlin"); 979 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 980 981 recover_flag = card->state; 982 rc = qeth_core_hardsetup_card(card); 983 if (rc) { 984 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc); 985 rc = -ENODEV; 986 goto out_remove; 987 } 988 989 if (!card->dev && qeth_l2_setup_netdev(card)) { 990 rc = -ENODEV; 991 goto out_remove; 992 } 993 994 if (card->info.type != QETH_CARD_TYPE_OSN) 995 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]); 996 997 if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) { 998 if (card->info.hwtrap && 999 qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)) 1000 card->info.hwtrap = 0; 1001 } else 1002 card->info.hwtrap = 0; 1003 1004 card->state = CARD_STATE_HARDSETUP; 1005 memset(&card->rx, 0, sizeof(struct qeth_rx)); 1006 qeth_print_status_message(card); 1007 1008 /* softsetup */ 1009 QETH_DBF_TEXT(SETUP, 2, "softsetp"); 1010 1011 rc = qeth_send_startlan(card); 1012 if (rc) { 1013 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 1014 if (rc == 0xe080) { 1015 dev_warn(&card->gdev->dev, 1016 "The LAN is offline\n"); 1017 card->lan_online = 0; 1018 goto contin; 1019 } 1020 rc = -ENODEV; 1021 goto out_remove; 1022 } else 1023 card->lan_online = 1; 1024 1025 contin: 1026 if ((card->info.type == QETH_CARD_TYPE_OSD) || 1027 (card->info.type == QETH_CARD_TYPE_OSX)) 1028 /* configure isolation level */ 1029 qeth_set_access_ctrl_online(card); 1030 1031 if (card->info.type != QETH_CARD_TYPE_OSN && 1032 card->info.type != QETH_CARD_TYPE_OSM) 1033 qeth_l2_process_vlans(card); 1034 1035 netif_tx_disable(card->dev); 1036 1037 rc = qeth_init_qdio_queues(card); 1038 if (rc) { 1039 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc); 1040 rc = -ENODEV; 1041 goto out_remove; 1042 } 1043 card->state = CARD_STATE_SOFTSETUP; 1044 if (card->lan_online) 1045 netif_carrier_on(card->dev); 1046 else 1047 netif_carrier_off(card->dev); 1048 1049 qeth_set_allowed_threads(card, 0xffffffff, 0); 1050 if (recover_flag == CARD_STATE_RECOVER) { 1051 if (recovery_mode && 1052 card->info.type != QETH_CARD_TYPE_OSN) { 1053 __qeth_l2_open(card->dev); 1054 } else { 1055 rtnl_lock(); 1056 dev_open(card->dev); 1057 rtnl_unlock(); 1058 } 1059 /* this also sets saved unicast addresses */ 1060 qeth_l2_set_multicast_list(card->dev); 1061 } 1062 /* let user_space know that device is online */ 1063 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE); 1064 mutex_unlock(&card->conf_mutex); 1065 mutex_unlock(&card->discipline_mutex); 1066 return 0; 1067 1068 out_remove: 1069 qeth_l2_stop_card(card, 0); 1070 ccw_device_set_offline(CARD_DDEV(card)); 1071 ccw_device_set_offline(CARD_WDEV(card)); 1072 ccw_device_set_offline(CARD_RDEV(card)); 1073 if (recover_flag == CARD_STATE_RECOVER) 1074 card->state = CARD_STATE_RECOVER; 1075 else 1076 card->state = CARD_STATE_DOWN; 1077 mutex_unlock(&card->conf_mutex); 1078 mutex_unlock(&card->discipline_mutex); 1079 return rc; 1080 } 1081 1082 static int qeth_l2_set_online(struct ccwgroup_device *gdev) 1083 { 1084 return __qeth_l2_set_online(gdev, 0); 1085 } 1086 1087 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, 1088 int recovery_mode) 1089 { 1090 struct qeth_card *card = dev_get_drvdata(&cgdev->dev); 1091 int rc = 0, rc2 = 0, rc3 = 0; 1092 enum qeth_card_states recover_flag; 1093 1094 mutex_lock(&card->discipline_mutex); 1095 mutex_lock(&card->conf_mutex); 1096 QETH_DBF_TEXT(SETUP, 3, "setoffl"); 1097 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *)); 1098 1099 if (card->dev && netif_carrier_ok(card->dev)) 1100 netif_carrier_off(card->dev); 1101 recover_flag = card->state; 1102 if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) { 1103 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 1104 card->info.hwtrap = 1; 1105 } 1106 qeth_l2_stop_card(card, recovery_mode); 1107 rc = ccw_device_set_offline(CARD_DDEV(card)); 1108 rc2 = ccw_device_set_offline(CARD_WDEV(card)); 1109 rc3 = ccw_device_set_offline(CARD_RDEV(card)); 1110 if (!rc) 1111 rc = (rc2) ? rc2 : rc3; 1112 if (rc) 1113 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 1114 if (recover_flag == CARD_STATE_UP) 1115 card->state = CARD_STATE_RECOVER; 1116 /* let user_space know that device is offline */ 1117 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE); 1118 mutex_unlock(&card->conf_mutex); 1119 mutex_unlock(&card->discipline_mutex); 1120 return 0; 1121 } 1122 1123 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev) 1124 { 1125 return __qeth_l2_set_offline(cgdev, 0); 1126 } 1127 1128 static int qeth_l2_recover(void *ptr) 1129 { 1130 struct qeth_card *card; 1131 int rc = 0; 1132 1133 card = (struct qeth_card *) ptr; 1134 QETH_CARD_TEXT(card, 2, "recover1"); 1135 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) 1136 return 0; 1137 QETH_CARD_TEXT(card, 2, "recover2"); 1138 dev_warn(&card->gdev->dev, 1139 "A recovery process has been started for the device\n"); 1140 __qeth_l2_set_offline(card->gdev, 1); 1141 rc = __qeth_l2_set_online(card->gdev, 1); 1142 if (!rc) 1143 dev_info(&card->gdev->dev, 1144 "Device successfully recovered!\n"); 1145 else { 1146 rtnl_lock(); 1147 dev_close(card->dev); 1148 rtnl_unlock(); 1149 dev_warn(&card->gdev->dev, "The qeth device driver " 1150 "failed to recover an error on the device\n"); 1151 } 1152 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 1153 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); 1154 return 0; 1155 } 1156 1157 static int __init qeth_l2_init(void) 1158 { 1159 pr_info("register layer 2 discipline\n"); 1160 return 0; 1161 } 1162 1163 static void __exit qeth_l2_exit(void) 1164 { 1165 pr_info("unregister layer 2 discipline\n"); 1166 } 1167 1168 static void qeth_l2_shutdown(struct ccwgroup_device *gdev) 1169 { 1170 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1171 qeth_set_allowed_threads(card, 0, 1); 1172 if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap) 1173 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 1174 qeth_qdio_clear_card(card, 0); 1175 qeth_clear_qdio_buffers(card); 1176 } 1177 1178 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev) 1179 { 1180 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1181 1182 if (card->dev) 1183 netif_device_detach(card->dev); 1184 qeth_set_allowed_threads(card, 0, 1); 1185 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); 1186 if (gdev->state == CCWGROUP_OFFLINE) 1187 return 0; 1188 if (card->state == CARD_STATE_UP) { 1189 if (card->info.hwtrap) 1190 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); 1191 __qeth_l2_set_offline(card->gdev, 1); 1192 } else 1193 __qeth_l2_set_offline(card->gdev, 0); 1194 return 0; 1195 } 1196 1197 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev) 1198 { 1199 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1200 int rc = 0; 1201 1202 if (gdev->state == CCWGROUP_OFFLINE) 1203 goto out; 1204 1205 if (card->state == CARD_STATE_RECOVER) { 1206 rc = __qeth_l2_set_online(card->gdev, 1); 1207 if (rc) { 1208 rtnl_lock(); 1209 dev_close(card->dev); 1210 rtnl_unlock(); 1211 } 1212 } else 1213 rc = __qeth_l2_set_online(card->gdev, 0); 1214 out: 1215 qeth_set_allowed_threads(card, 0xffffffff, 0); 1216 if (card->dev) 1217 netif_device_attach(card->dev); 1218 if (rc) 1219 dev_warn(&card->gdev->dev, "The qeth device driver " 1220 "failed to recover an error on the device\n"); 1221 return rc; 1222 } 1223 1224 struct qeth_discipline qeth_l2_discipline = { 1225 .start_poll = qeth_qdio_start_poll, 1226 .input_handler = (qdio_handler_t *) qeth_qdio_input_handler, 1227 .output_handler = (qdio_handler_t *) qeth_qdio_output_handler, 1228 .recover = qeth_l2_recover, 1229 .setup = qeth_l2_probe_device, 1230 .remove = qeth_l2_remove_device, 1231 .set_online = qeth_l2_set_online, 1232 .set_offline = qeth_l2_set_offline, 1233 .shutdown = qeth_l2_shutdown, 1234 .freeze = qeth_l2_pm_suspend, 1235 .thaw = qeth_l2_pm_resume, 1236 .restore = qeth_l2_pm_resume, 1237 }; 1238 EXPORT_SYMBOL_GPL(qeth_l2_discipline); 1239 1240 static int qeth_osn_send_control_data(struct qeth_card *card, int len, 1241 struct qeth_cmd_buffer *iob) 1242 { 1243 unsigned long flags; 1244 int rc = 0; 1245 1246 QETH_CARD_TEXT(card, 5, "osndctrd"); 1247 1248 wait_event(card->wait_q, 1249 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0); 1250 qeth_prepare_control_data(card, len, iob); 1251 QETH_CARD_TEXT(card, 6, "osnoirqp"); 1252 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags); 1253 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw, 1254 (addr_t) iob, 0, 0); 1255 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags); 1256 if (rc) { 1257 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: " 1258 "ccw_device_start rc = %i\n", rc); 1259 QETH_CARD_TEXT_(card, 2, " err%d", rc); 1260 qeth_release_buffer(iob->channel, iob); 1261 atomic_set(&card->write.irq_pending, 0); 1262 wake_up(&card->wait_q); 1263 } 1264 return rc; 1265 } 1266 1267 static int qeth_osn_send_ipa_cmd(struct qeth_card *card, 1268 struct qeth_cmd_buffer *iob, int data_len) 1269 { 1270 u16 s1, s2; 1271 1272 QETH_CARD_TEXT(card, 4, "osndipa"); 1273 1274 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2); 1275 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len); 1276 s2 = (u16)data_len; 1277 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2); 1278 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2); 1279 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2); 1280 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2); 1281 return qeth_osn_send_control_data(card, s1, iob); 1282 } 1283 1284 int qeth_osn_assist(struct net_device *dev, void *data, int data_len) 1285 { 1286 struct qeth_cmd_buffer *iob; 1287 struct qeth_card *card; 1288 int rc; 1289 1290 if (!dev) 1291 return -ENODEV; 1292 card = dev->ml_priv; 1293 if (!card) 1294 return -ENODEV; 1295 QETH_CARD_TEXT(card, 2, "osnsdmc"); 1296 if ((card->state != CARD_STATE_UP) && 1297 (card->state != CARD_STATE_SOFTSETUP)) 1298 return -ENODEV; 1299 iob = qeth_wait_for_buffer(&card->write); 1300 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len); 1301 rc = qeth_osn_send_ipa_cmd(card, iob, data_len); 1302 return rc; 1303 } 1304 EXPORT_SYMBOL(qeth_osn_assist); 1305 1306 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev, 1307 int (*assist_cb)(struct net_device *, void *), 1308 int (*data_cb)(struct sk_buff *)) 1309 { 1310 struct qeth_card *card; 1311 1312 *dev = qeth_l2_netdev_by_devno(read_dev_no); 1313 if (*dev == NULL) 1314 return -ENODEV; 1315 card = (*dev)->ml_priv; 1316 if (!card) 1317 return -ENODEV; 1318 QETH_CARD_TEXT(card, 2, "osnreg"); 1319 if ((assist_cb == NULL) || (data_cb == NULL)) 1320 return -EINVAL; 1321 card->osn_info.assist_cb = assist_cb; 1322 card->osn_info.data_cb = data_cb; 1323 return 0; 1324 } 1325 EXPORT_SYMBOL(qeth_osn_register); 1326 1327 void qeth_osn_deregister(struct net_device *dev) 1328 { 1329 struct qeth_card *card; 1330 1331 if (!dev) 1332 return; 1333 card = dev->ml_priv; 1334 if (!card) 1335 return; 1336 QETH_CARD_TEXT(card, 2, "osndereg"); 1337 card->osn_info.assist_cb = NULL; 1338 card->osn_info.data_cb = NULL; 1339 return; 1340 } 1341 EXPORT_SYMBOL(qeth_osn_deregister); 1342 1343 module_init(qeth_l2_init); 1344 module_exit(qeth_l2_exit); 1345 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); 1346 MODULE_DESCRIPTION("qeth layer 2 discipline"); 1347 MODULE_LICENSE("GPL"); 1348