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 default: 79 rc = -EOPNOTSUPP; 80 } 81 if (rc) 82 QETH_CARD_TEXT_(card, 2, "ioce%d", rc); 83 return rc; 84 } 85 86 static int qeth_l2_verify_dev(struct net_device *dev) 87 { 88 struct qeth_card *card; 89 unsigned long flags; 90 int rc = 0; 91 92 read_lock_irqsave(&qeth_core_card_list.rwlock, flags); 93 list_for_each_entry(card, &qeth_core_card_list.list, list) { 94 if (card->dev == dev) { 95 rc = QETH_REAL_CARD; 96 break; 97 } 98 } 99 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); 100 101 return rc; 102 } 103 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no) 105 { 106 struct qeth_card *card; 107 struct net_device *ndev; 108 __u16 temp_dev_no; 109 unsigned long flags; 110 struct ccw_dev_id read_devid; 111 112 ndev = NULL; 113 memcpy(&temp_dev_no, read_dev_no, 2); 114 read_lock_irqsave(&qeth_core_card_list.rwlock, flags); 115 list_for_each_entry(card, &qeth_core_card_list.list, list) { 116 ccw_device_get_id(CARD_RDEV(card), &read_devid); 117 if (read_devid.devno == temp_dev_no) { 118 ndev = card->dev; 119 break; 120 } 121 } 122 read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags); 123 return ndev; 124 } 125 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card, 127 struct qeth_reply *reply, 128 unsigned long data) 129 { 130 struct qeth_ipa_cmd *cmd; 131 __u8 *mac; 132 133 QETH_CARD_TEXT(card, 2, "L2Sgmacb"); 134 cmd = (struct qeth_ipa_cmd *) data; 135 mac = &cmd->data.setdelmac.mac[0]; 136 /* MAC already registered, needed in couple/uncouple case */ 137 if (cmd->hdr.return_code == IPA_RC_L2_DUP_MAC) { 138 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n", 139 mac, QETH_CARD_IFNAME(card)); 140 cmd->hdr.return_code = 0; 141 } 142 if (cmd->hdr.return_code) 143 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n", 144 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code); 145 return 0; 146 } 147 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac) 149 { 150 QETH_CARD_TEXT(card, 2, "L2Sgmac"); 151 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC, 152 qeth_l2_send_setgroupmac_cb); 153 } 154 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card, 156 struct qeth_reply *reply, 157 unsigned long data) 158 { 159 struct qeth_ipa_cmd *cmd; 160 __u8 *mac; 161 162 QETH_CARD_TEXT(card, 2, "L2Dgmacb"); 163 cmd = (struct qeth_ipa_cmd *) data; 164 mac = &cmd->data.setdelmac.mac[0]; 165 if (cmd->hdr.return_code) 166 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n", 167 mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code); 168 return 0; 169 } 170 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac) 172 { 173 QETH_CARD_TEXT(card, 2, "L2Dgmac"); 174 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC, 175 qeth_l2_send_delgroupmac_cb); 176 } 177 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac) 179 { 180 struct qeth_mc_mac *mc; 181 int rc; 182 183 mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC); 184 185 if (!mc) 186 return; 187 188 memcpy(mc->mc_addr, mac, OSA_ADDR_LEN); 189 mc->mc_addrlen = OSA_ADDR_LEN; 190 mc->is_vmac = vmac; 191 192 if (vmac) { 193 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC, 194 NULL); 195 } else { 196 rc = qeth_l2_send_setgroupmac(card, mac); 197 } 198 199 if (!rc) 200 list_add_tail(&mc->list, &card->mc_list); 201 else 202 kfree(mc); 203 } 204 205 static void qeth_l2_del_all_mc(struct qeth_card *card, int del) 206 { 207 struct qeth_mc_mac *mc, *tmp; 208 209 spin_lock_bh(&card->mclock); 210 list_for_each_entry_safe(mc, tmp, &card->mc_list, list) { 211 if (del) { 212 if (mc->is_vmac) 213 qeth_l2_send_setdelmac(card, mc->mc_addr, 214 IPA_CMD_DELVMAC, NULL); 215 else 216 qeth_l2_send_delgroupmac(card, mc->mc_addr); 217 } 218 list_del(&mc->list); 219 kfree(mc); 220 } 221 spin_unlock_bh(&card->mclock); 222 } 223 224 static inline int qeth_l2_get_cast_type(struct qeth_card *card, 225 struct sk_buff *skb) 226 { 227 if (card->info.type == QETH_CARD_TYPE_OSN) 228 return RTN_UNSPEC; 229 if (is_broadcast_ether_addr(skb->data)) 230 return RTN_BROADCAST; 231 if (is_multicast_ether_addr(skb->data)) 232 return RTN_MULTICAST; 233 return RTN_UNSPEC; 234 } 235 236 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr, 237 struct sk_buff *skb, int ipv, int cast_type) 238 { 239 struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb); 240 241 memset(hdr, 0, sizeof(struct qeth_hdr)); 242 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2; 243 244 /* set byte byte 3 to casting flags */ 245 if (cast_type == RTN_MULTICAST) 246 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST; 247 else if (cast_type == RTN_BROADCAST) 248 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST; 249 else 250 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST; 251 252 hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE; 253 /* VSWITCH relies on the VLAN 254 * information to be present in 255 * the QDIO header */ 256 if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) { 257 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN; 258 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI); 259 } 260 } 261 262 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card, 263 struct qeth_reply *reply, unsigned long data) 264 { 265 struct qeth_ipa_cmd *cmd; 266 267 QETH_CARD_TEXT(card, 2, "L2sdvcb"); 268 cmd = (struct qeth_ipa_cmd *) data; 269 if (cmd->hdr.return_code) { 270 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. " 271 "Continuing\n", cmd->data.setdelvlan.vlan_id, 272 QETH_CARD_IFNAME(card), cmd->hdr.return_code); 273 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command); 274 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code); 275 } 276 return 0; 277 } 278 279 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i, 280 enum qeth_ipa_cmds ipacmd) 281 { 282 struct qeth_ipa_cmd *cmd; 283 struct qeth_cmd_buffer *iob; 284 285 QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd); 286 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); 287 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); 288 cmd->data.setdelvlan.vlan_id = i; 289 return qeth_send_ipa_cmd(card, iob, 290 qeth_l2_send_setdelvlan_cb, NULL); 291 } 292 293 static void qeth_l2_process_vlans(struct qeth_card *card) 294 { 295 struct qeth_vlan_vid *id; 296 QETH_CARD_TEXT(card, 3, "L2prcvln"); 297 spin_lock_bh(&card->vlanlock); 298 list_for_each_entry(id, &card->vid_list, list) { 299 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN); 300 } 301 spin_unlock_bh(&card->vlanlock); 302 } 303 304 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 305 { 306 struct qeth_card *card = dev->ml_priv; 307 struct qeth_vlan_vid *id; 308 309 QETH_CARD_TEXT_(card, 4, "aid:%d", vid); 310 if (!vid) 311 return; 312 if (card->info.type == QETH_CARD_TYPE_OSM) { 313 QETH_CARD_TEXT(card, 3, "aidOSM"); 314 return; 315 } 316 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 317 QETH_CARD_TEXT(card, 3, "aidREC"); 318 return; 319 } 320 id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC); 321 if (id) { 322 id->vid = vid; 323 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN); 324 spin_lock_bh(&card->vlanlock); 325 list_add_tail(&id->list, &card->vid_list); 326 spin_unlock_bh(&card->vlanlock); 327 } 328 } 329 330 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 331 { 332 struct qeth_vlan_vid *id, *tmpid = NULL; 333 struct qeth_card *card = dev->ml_priv; 334 335 QETH_CARD_TEXT_(card, 4, "kid:%d", vid); 336 if (card->info.type == QETH_CARD_TYPE_OSM) { 337 QETH_CARD_TEXT(card, 3, "kidOSM"); 338 return; 339 } 340 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 341 QETH_CARD_TEXT(card, 3, "kidREC"); 342 return; 343 } 344 spin_lock_bh(&card->vlanlock); 345 list_for_each_entry(id, &card->vid_list, list) { 346 if (id->vid == vid) { 347 list_del(&id->list); 348 tmpid = id; 349 break; 350 } 351 } 352 spin_unlock_bh(&card->vlanlock); 353 if (tmpid) { 354 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN); 355 kfree(tmpid); 356 } 357 qeth_l2_set_multicast_list(card->dev); 358 } 359 360 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode) 361 { 362 int rc = 0; 363 364 QETH_DBF_TEXT(SETUP , 2, "stopcard"); 365 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 366 367 qeth_set_allowed_threads(card, 0, 1); 368 if (card->read.state == CH_STATE_UP && 369 card->write.state == CH_STATE_UP && 370 (card->state == CARD_STATE_UP)) { 371 if (recovery_mode && 372 card->info.type != QETH_CARD_TYPE_OSN) { 373 qeth_l2_stop(card->dev); 374 } else { 375 rtnl_lock(); 376 dev_close(card->dev); 377 rtnl_unlock(); 378 } 379 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 380 card->state = CARD_STATE_SOFTSETUP; 381 } 382 if (card->state == CARD_STATE_SOFTSETUP) { 383 qeth_l2_del_all_mc(card, 0); 384 qeth_clear_ipacmd_list(card); 385 card->state = CARD_STATE_HARDSETUP; 386 } 387 if (card->state == CARD_STATE_HARDSETUP) { 388 qeth_qdio_clear_card(card, 0); 389 qeth_clear_qdio_buffers(card); 390 qeth_clear_working_pool_list(card); 391 card->state = CARD_STATE_DOWN; 392 } 393 if (card->state == CARD_STATE_DOWN) { 394 qeth_clear_cmd_buffers(&card->read); 395 qeth_clear_cmd_buffers(&card->write); 396 } 397 return rc; 398 } 399 400 static int qeth_l2_process_inbound_buffer(struct qeth_card *card, 401 int budget, int *done) 402 { 403 int work_done = 0; 404 struct sk_buff *skb; 405 struct qeth_hdr *hdr; 406 unsigned int len; 407 408 *done = 0; 409 BUG_ON(!budget); 410 while (budget) { 411 skb = qeth_core_get_next_skb(card, 412 card->qdio.in_q->bufs[card->rx.b_index].buffer, 413 &card->rx.b_element, &card->rx.e_offset, &hdr); 414 if (!skb) { 415 *done = 1; 416 break; 417 } 418 skb->dev = card->dev; 419 switch (hdr->hdr.l2.id) { 420 case QETH_HEADER_TYPE_LAYER2: 421 skb->pkt_type = PACKET_HOST; 422 skb->protocol = eth_type_trans(skb, skb->dev); 423 if (card->options.checksum_type == NO_CHECKSUMMING) 424 skb->ip_summed = CHECKSUM_UNNECESSARY; 425 else 426 skb->ip_summed = CHECKSUM_NONE; 427 if (skb->protocol == htons(ETH_P_802_2)) 428 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno; 429 len = skb->len; 430 netif_receive_skb(skb); 431 break; 432 case QETH_HEADER_TYPE_OSN: 433 if (card->info.type == QETH_CARD_TYPE_OSN) { 434 skb_push(skb, sizeof(struct qeth_hdr)); 435 skb_copy_to_linear_data(skb, hdr, 436 sizeof(struct qeth_hdr)); 437 len = skb->len; 438 card->osn_info.data_cb(skb); 439 break; 440 } 441 /* else unknown */ 442 default: 443 dev_kfree_skb_any(skb); 444 QETH_CARD_TEXT(card, 3, "inbunkno"); 445 QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN); 446 continue; 447 } 448 work_done++; 449 budget--; 450 card->stats.rx_packets++; 451 card->stats.rx_bytes += len; 452 } 453 return work_done; 454 } 455 456 static int qeth_l2_poll(struct napi_struct *napi, int budget) 457 { 458 struct qeth_card *card = container_of(napi, struct qeth_card, napi); 459 int work_done = 0; 460 struct qeth_qdio_buffer *buffer; 461 int done; 462 int new_budget = budget; 463 464 if (card->options.performance_stats) { 465 card->perf_stats.inbound_cnt++; 466 card->perf_stats.inbound_start_time = qeth_get_micros(); 467 } 468 469 while (1) { 470 if (!card->rx.b_count) { 471 card->rx.qdio_err = 0; 472 card->rx.b_count = qdio_get_next_buffers( 473 card->data.ccwdev, 0, &card->rx.b_index, 474 &card->rx.qdio_err); 475 if (card->rx.b_count <= 0) { 476 card->rx.b_count = 0; 477 break; 478 } 479 card->rx.b_element = 480 &card->qdio.in_q->bufs[card->rx.b_index] 481 .buffer->element[0]; 482 card->rx.e_offset = 0; 483 } 484 485 while (card->rx.b_count) { 486 buffer = &card->qdio.in_q->bufs[card->rx.b_index]; 487 if (!(card->rx.qdio_err && 488 qeth_check_qdio_errors(card, buffer->buffer, 489 card->rx.qdio_err, "qinerr"))) 490 work_done += qeth_l2_process_inbound_buffer( 491 card, new_budget, &done); 492 else 493 done = 1; 494 495 if (done) { 496 if (card->options.performance_stats) 497 card->perf_stats.bufs_rec++; 498 qeth_put_buffer_pool_entry(card, 499 buffer->pool_entry); 500 qeth_queue_input_buffer(card, card->rx.b_index); 501 card->rx.b_count--; 502 if (card->rx.b_count) { 503 card->rx.b_index = 504 (card->rx.b_index + 1) % 505 QDIO_MAX_BUFFERS_PER_Q; 506 card->rx.b_element = 507 &card->qdio.in_q 508 ->bufs[card->rx.b_index] 509 .buffer->element[0]; 510 card->rx.e_offset = 0; 511 } 512 } 513 514 if (work_done >= budget) 515 goto out; 516 else 517 new_budget = budget - work_done; 518 } 519 } 520 521 napi_complete(napi); 522 if (qdio_start_irq(card->data.ccwdev, 0)) 523 napi_schedule(&card->napi); 524 out: 525 if (card->options.performance_stats) 526 card->perf_stats.inbound_time += qeth_get_micros() - 527 card->perf_stats.inbound_start_time; 528 return work_done; 529 } 530 531 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac, 532 enum qeth_ipa_cmds ipacmd, 533 int (*reply_cb) (struct qeth_card *, 534 struct qeth_reply*, 535 unsigned long)) 536 { 537 struct qeth_ipa_cmd *cmd; 538 struct qeth_cmd_buffer *iob; 539 540 QETH_CARD_TEXT(card, 2, "L2sdmac"); 541 iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4); 542 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE); 543 cmd->data.setdelmac.mac_length = OSA_ADDR_LEN; 544 memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN); 545 return qeth_send_ipa_cmd(card, iob, reply_cb, NULL); 546 } 547 548 static int qeth_l2_send_setmac_cb(struct qeth_card *card, 549 struct qeth_reply *reply, 550 unsigned long data) 551 { 552 struct qeth_ipa_cmd *cmd; 553 554 QETH_CARD_TEXT(card, 2, "L2Smaccb"); 555 cmd = (struct qeth_ipa_cmd *) data; 556 if (cmd->hdr.return_code) { 557 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code); 558 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 559 switch (cmd->hdr.return_code) { 560 case IPA_RC_L2_DUP_MAC: 561 case IPA_RC_L2_DUP_LAYER3_MAC: 562 dev_warn(&card->gdev->dev, 563 "MAC address %pM already exists\n", 564 cmd->data.setdelmac.mac); 565 break; 566 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP: 567 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP: 568 dev_warn(&card->gdev->dev, 569 "MAC address %pM is not authorized\n", 570 cmd->data.setdelmac.mac); 571 break; 572 default: 573 break; 574 } 575 cmd->hdr.return_code = -EIO; 576 } else { 577 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED; 578 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac, 579 OSA_ADDR_LEN); 580 dev_info(&card->gdev->dev, 581 "MAC address %pM successfully registered on device %s\n", 582 card->dev->dev_addr, card->dev->name); 583 } 584 return 0; 585 } 586 587 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac) 588 { 589 QETH_CARD_TEXT(card, 2, "L2Setmac"); 590 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC, 591 qeth_l2_send_setmac_cb); 592 } 593 594 static int qeth_l2_send_delmac_cb(struct qeth_card *card, 595 struct qeth_reply *reply, 596 unsigned long data) 597 { 598 struct qeth_ipa_cmd *cmd; 599 600 QETH_CARD_TEXT(card, 2, "L2Dmaccb"); 601 cmd = (struct qeth_ipa_cmd *) data; 602 if (cmd->hdr.return_code) { 603 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code); 604 cmd->hdr.return_code = -EIO; 605 return 0; 606 } 607 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED; 608 609 return 0; 610 } 611 612 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac) 613 { 614 QETH_CARD_TEXT(card, 2, "L2Delmac"); 615 if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)) 616 return 0; 617 return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC, 618 qeth_l2_send_delmac_cb); 619 } 620 621 static int qeth_l2_request_initial_mac(struct qeth_card *card) 622 { 623 int rc = 0; 624 char vendor_pre[] = {0x02, 0x00, 0x00}; 625 626 QETH_DBF_TEXT(SETUP, 2, "doL2init"); 627 QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card)); 628 629 rc = qeth_query_setadapterparms(card); 630 if (rc) { 631 QETH_DBF_MESSAGE(2, "could not query adapter parameters on " 632 "device %s: x%x\n", CARD_BUS_ID(card), rc); 633 } 634 635 if (card->info.type == QETH_CARD_TYPE_IQD || 636 card->info.type == QETH_CARD_TYPE_OSM || 637 card->info.type == QETH_CARD_TYPE_OSX || 638 card->info.guestlan) { 639 rc = qeth_setadpparms_change_macaddr(card); 640 if (rc) { 641 QETH_DBF_MESSAGE(2, "couldn't get MAC address on " 642 "device %s: x%x\n", CARD_BUS_ID(card), rc); 643 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 644 return rc; 645 } 646 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN); 647 } else { 648 random_ether_addr(card->dev->dev_addr); 649 memcpy(card->dev->dev_addr, vendor_pre, 3); 650 } 651 return 0; 652 } 653 654 static int qeth_l2_set_mac_address(struct net_device *dev, void *p) 655 { 656 struct sockaddr *addr = p; 657 struct qeth_card *card = dev->ml_priv; 658 int rc = 0; 659 660 QETH_CARD_TEXT(card, 3, "setmac"); 661 662 if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) { 663 QETH_CARD_TEXT(card, 3, "setmcINV"); 664 return -EOPNOTSUPP; 665 } 666 667 if (card->info.type == QETH_CARD_TYPE_OSN || 668 card->info.type == QETH_CARD_TYPE_OSM || 669 card->info.type == QETH_CARD_TYPE_OSX) { 670 QETH_CARD_TEXT(card, 3, "setmcTYP"); 671 return -EOPNOTSUPP; 672 } 673 QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN); 674 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 675 QETH_CARD_TEXT(card, 3, "setmcREC"); 676 return -ERESTARTSYS; 677 } 678 rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]); 679 if (!rc) 680 rc = qeth_l2_send_setmac(card, addr->sa_data); 681 return rc; 682 } 683 684 static void qeth_l2_set_multicast_list(struct net_device *dev) 685 { 686 struct qeth_card *card = dev->ml_priv; 687 struct netdev_hw_addr *ha; 688 689 if (card->info.type == QETH_CARD_TYPE_OSN) 690 return ; 691 692 QETH_CARD_TEXT(card, 3, "setmulti"); 693 if (qeth_threads_running(card, QETH_RECOVER_THREAD) && 694 (card->state != CARD_STATE_UP)) 695 return; 696 qeth_l2_del_all_mc(card, 1); 697 spin_lock_bh(&card->mclock); 698 netdev_for_each_mc_addr(ha, dev) 699 qeth_l2_add_mc(card, ha->addr, 0); 700 701 netdev_for_each_uc_addr(ha, dev) 702 qeth_l2_add_mc(card, ha->addr, 1); 703 704 spin_unlock_bh(&card->mclock); 705 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) 706 return; 707 qeth_setadp_promisc_mode(card); 708 } 709 710 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) 711 { 712 int rc; 713 struct qeth_hdr *hdr = NULL; 714 int elements = 0; 715 struct qeth_card *card = dev->ml_priv; 716 struct sk_buff *new_skb = skb; 717 int ipv = qeth_get_ip_version(skb); 718 int cast_type = qeth_l2_get_cast_type(card, skb); 719 struct qeth_qdio_out_q *queue = card->qdio.out_qs 720 [qeth_get_priority_queue(card, skb, ipv, cast_type)]; 721 int tx_bytes = skb->len; 722 int data_offset = -1; 723 int elements_needed = 0; 724 int hd_len = 0; 725 726 if ((card->state != CARD_STATE_UP) || !card->lan_online) { 727 card->stats.tx_carrier_errors++; 728 goto tx_drop; 729 } 730 731 if ((card->info.type == QETH_CARD_TYPE_OSN) && 732 (skb->protocol == htons(ETH_P_IPV6))) 733 goto tx_drop; 734 735 if (card->options.performance_stats) { 736 card->perf_stats.outbound_cnt++; 737 card->perf_stats.outbound_start_time = qeth_get_micros(); 738 } 739 netif_stop_queue(dev); 740 741 if (card->info.type == QETH_CARD_TYPE_OSN) 742 hdr = (struct qeth_hdr *)skb->data; 743 else { 744 if (card->info.type == QETH_CARD_TYPE_IQD) { 745 new_skb = skb; 746 data_offset = ETH_HLEN; 747 hd_len = ETH_HLEN; 748 hdr = kmem_cache_alloc(qeth_core_header_cache, 749 GFP_ATOMIC); 750 if (!hdr) 751 goto tx_drop; 752 elements_needed++; 753 skb_reset_mac_header(new_skb); 754 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type); 755 hdr->hdr.l2.pkt_length = new_skb->len; 756 memcpy(((char *)hdr) + sizeof(struct qeth_hdr), 757 skb_mac_header(new_skb), ETH_HLEN); 758 } else { 759 /* create a clone with writeable headroom */ 760 new_skb = skb_realloc_headroom(skb, 761 sizeof(struct qeth_hdr)); 762 if (!new_skb) 763 goto tx_drop; 764 hdr = (struct qeth_hdr *)skb_push(new_skb, 765 sizeof(struct qeth_hdr)); 766 skb_set_mac_header(new_skb, sizeof(struct qeth_hdr)); 767 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type); 768 } 769 } 770 771 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 772 elements_needed); 773 if (!elements) { 774 if (data_offset >= 0) 775 kmem_cache_free(qeth_core_header_cache, hdr); 776 goto tx_drop; 777 } 778 779 if (card->info.type != QETH_CARD_TYPE_IQD) { 780 if (qeth_hdr_chk_and_bounce(new_skb, 781 sizeof(struct qeth_hdr_layer2))) 782 goto tx_drop; 783 rc = qeth_do_send_packet(card, queue, new_skb, hdr, 784 elements); 785 } else 786 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr, 787 elements, data_offset, hd_len); 788 if (!rc) { 789 card->stats.tx_packets++; 790 card->stats.tx_bytes += tx_bytes; 791 if (new_skb != skb) 792 dev_kfree_skb_any(skb); 793 rc = NETDEV_TX_OK; 794 } else { 795 if (data_offset >= 0) 796 kmem_cache_free(qeth_core_header_cache, hdr); 797 798 if (rc == -EBUSY) { 799 if (new_skb != skb) 800 dev_kfree_skb_any(new_skb); 801 return NETDEV_TX_BUSY; 802 } else 803 goto tx_drop; 804 } 805 806 netif_wake_queue(dev); 807 if (card->options.performance_stats) 808 card->perf_stats.outbound_time += qeth_get_micros() - 809 card->perf_stats.outbound_start_time; 810 return rc; 811 812 tx_drop: 813 card->stats.tx_dropped++; 814 card->stats.tx_errors++; 815 if ((new_skb != skb) && new_skb) 816 dev_kfree_skb_any(new_skb); 817 dev_kfree_skb_any(skb); 818 netif_wake_queue(dev); 819 return NETDEV_TX_OK; 820 } 821 822 static int __qeth_l2_open(struct net_device *dev) 823 { 824 struct qeth_card *card = dev->ml_priv; 825 int rc = 0; 826 827 QETH_CARD_TEXT(card, 4, "qethopen"); 828 if (card->state == CARD_STATE_UP) 829 return rc; 830 if (card->state != CARD_STATE_SOFTSETUP) 831 return -ENODEV; 832 833 if ((card->info.type != QETH_CARD_TYPE_OSN) && 834 (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) { 835 QETH_CARD_TEXT(card, 4, "nomacadr"); 836 return -EPERM; 837 } 838 card->data.state = CH_STATE_UP; 839 card->state = CARD_STATE_UP; 840 netif_start_queue(dev); 841 842 if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) { 843 napi_enable(&card->napi); 844 napi_schedule(&card->napi); 845 } else 846 rc = -EIO; 847 return rc; 848 } 849 850 static int qeth_l2_open(struct net_device *dev) 851 { 852 struct qeth_card *card = dev->ml_priv; 853 854 QETH_CARD_TEXT(card, 5, "qethope_"); 855 if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) { 856 QETH_CARD_TEXT(card, 3, "openREC"); 857 return -ERESTARTSYS; 858 } 859 return __qeth_l2_open(dev); 860 } 861 862 static int qeth_l2_stop(struct net_device *dev) 863 { 864 struct qeth_card *card = dev->ml_priv; 865 866 QETH_CARD_TEXT(card, 4, "qethstop"); 867 netif_tx_disable(dev); 868 if (card->state == CARD_STATE_UP) { 869 card->state = CARD_STATE_SOFTSETUP; 870 napi_disable(&card->napi); 871 } 872 return 0; 873 } 874 875 static int qeth_l2_probe_device(struct ccwgroup_device *gdev) 876 { 877 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 878 879 INIT_LIST_HEAD(&card->vid_list); 880 INIT_LIST_HEAD(&card->mc_list); 881 card->options.layer2 = 1; 882 card->discipline.start_poll = qeth_qdio_start_poll; 883 card->discipline.input_handler = (qdio_handler_t *) 884 qeth_qdio_input_handler; 885 card->discipline.output_handler = (qdio_handler_t *) 886 qeth_qdio_output_handler; 887 card->discipline.recover = qeth_l2_recover; 888 return 0; 889 } 890 891 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev) 892 { 893 struct qeth_card *card = dev_get_drvdata(&cgdev->dev); 894 895 qeth_set_allowed_threads(card, 0, 1); 896 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); 897 898 if (cgdev->state == CCWGROUP_ONLINE) 899 qeth_l2_set_offline(cgdev); 900 901 if (card->dev) { 902 unregister_netdev(card->dev); 903 card->dev = NULL; 904 } 905 return; 906 } 907 908 static const struct ethtool_ops qeth_l2_ethtool_ops = { 909 .get_link = ethtool_op_get_link, 910 .get_strings = qeth_core_get_strings, 911 .get_ethtool_stats = qeth_core_get_ethtool_stats, 912 .get_sset_count = qeth_core_get_sset_count, 913 .get_drvinfo = qeth_core_get_drvinfo, 914 .get_settings = qeth_core_ethtool_get_settings, 915 }; 916 917 static const struct ethtool_ops qeth_l2_osn_ops = { 918 .get_strings = qeth_core_get_strings, 919 .get_ethtool_stats = qeth_core_get_ethtool_stats, 920 .get_sset_count = qeth_core_get_sset_count, 921 .get_drvinfo = qeth_core_get_drvinfo, 922 }; 923 924 static const struct net_device_ops qeth_l2_netdev_ops = { 925 .ndo_open = qeth_l2_open, 926 .ndo_stop = qeth_l2_stop, 927 .ndo_get_stats = qeth_get_stats, 928 .ndo_start_xmit = qeth_l2_hard_start_xmit, 929 .ndo_validate_addr = eth_validate_addr, 930 .ndo_set_multicast_list = qeth_l2_set_multicast_list, 931 .ndo_do_ioctl = qeth_l2_do_ioctl, 932 .ndo_set_mac_address = qeth_l2_set_mac_address, 933 .ndo_change_mtu = qeth_change_mtu, 934 .ndo_vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid, 935 .ndo_vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid, 936 .ndo_tx_timeout = qeth_tx_timeout, 937 }; 938 939 static int qeth_l2_setup_netdev(struct qeth_card *card) 940 { 941 switch (card->info.type) { 942 case QETH_CARD_TYPE_IQD: 943 card->dev = alloc_netdev(0, "hsi%d", ether_setup); 944 break; 945 case QETH_CARD_TYPE_OSN: 946 card->dev = alloc_netdev(0, "osn%d", ether_setup); 947 card->dev->flags |= IFF_NOARP; 948 break; 949 default: 950 card->dev = alloc_etherdev(0); 951 } 952 953 if (!card->dev) 954 return -ENODEV; 955 956 card->dev->ml_priv = card; 957 card->dev->watchdog_timeo = QETH_TX_TIMEOUT; 958 card->dev->mtu = card->info.initial_mtu; 959 card->dev->netdev_ops = &qeth_l2_netdev_ops; 960 if (card->info.type != QETH_CARD_TYPE_OSN) 961 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops); 962 else 963 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops); 964 card->dev->features |= NETIF_F_HW_VLAN_FILTER; 965 card->info.broadcast_capable = 1; 966 qeth_l2_request_initial_mac(card); 967 SET_NETDEV_DEV(card->dev, &card->gdev->dev); 968 netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT); 969 return register_netdev(card->dev); 970 } 971 972 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode) 973 { 974 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 975 int rc = 0; 976 enum qeth_card_states recover_flag; 977 978 BUG_ON(!card); 979 mutex_lock(&card->discipline_mutex); 980 mutex_lock(&card->conf_mutex); 981 QETH_DBF_TEXT(SETUP, 2, "setonlin"); 982 QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); 983 984 recover_flag = card->state; 985 rc = qeth_core_hardsetup_card(card); 986 if (rc) { 987 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc); 988 rc = -ENODEV; 989 goto out_remove; 990 } 991 992 if (!card->dev && qeth_l2_setup_netdev(card)) { 993 rc = -ENODEV; 994 goto out_remove; 995 } 996 997 if (card->info.type != QETH_CARD_TYPE_OSN) 998 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]); 999 1000 card->state = CARD_STATE_HARDSETUP; 1001 memset(&card->rx, 0, sizeof(struct qeth_rx)); 1002 qeth_print_status_message(card); 1003 1004 /* softsetup */ 1005 QETH_DBF_TEXT(SETUP, 2, "softsetp"); 1006 1007 rc = qeth_send_startlan(card); 1008 if (rc) { 1009 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 1010 if (rc == 0xe080) { 1011 dev_warn(&card->gdev->dev, 1012 "The LAN is offline\n"); 1013 card->lan_online = 0; 1014 goto contin; 1015 } 1016 rc = -ENODEV; 1017 goto out_remove; 1018 } else 1019 card->lan_online = 1; 1020 1021 contin: 1022 if ((card->info.type == QETH_CARD_TYPE_OSD) || 1023 (card->info.type == QETH_CARD_TYPE_OSX)) 1024 /* configure isolation level */ 1025 qeth_set_access_ctrl_online(card); 1026 1027 if (card->info.type != QETH_CARD_TYPE_OSN && 1028 card->info.type != QETH_CARD_TYPE_OSM) 1029 qeth_l2_process_vlans(card); 1030 1031 netif_tx_disable(card->dev); 1032 1033 rc = qeth_init_qdio_queues(card); 1034 if (rc) { 1035 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc); 1036 rc = -ENODEV; 1037 goto out_remove; 1038 } 1039 card->state = CARD_STATE_SOFTSETUP; 1040 if (card->lan_online) 1041 netif_carrier_on(card->dev); 1042 else 1043 netif_carrier_off(card->dev); 1044 1045 qeth_set_allowed_threads(card, 0xffffffff, 0); 1046 if (recover_flag == CARD_STATE_RECOVER) { 1047 if (recovery_mode && 1048 card->info.type != QETH_CARD_TYPE_OSN) { 1049 __qeth_l2_open(card->dev); 1050 } else { 1051 rtnl_lock(); 1052 dev_open(card->dev); 1053 rtnl_unlock(); 1054 } 1055 /* this also sets saved unicast addresses */ 1056 qeth_l2_set_multicast_list(card->dev); 1057 } 1058 /* let user_space know that device is online */ 1059 kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE); 1060 mutex_unlock(&card->conf_mutex); 1061 mutex_unlock(&card->discipline_mutex); 1062 return 0; 1063 1064 out_remove: 1065 qeth_l2_stop_card(card, 0); 1066 ccw_device_set_offline(CARD_DDEV(card)); 1067 ccw_device_set_offline(CARD_WDEV(card)); 1068 ccw_device_set_offline(CARD_RDEV(card)); 1069 if (recover_flag == CARD_STATE_RECOVER) 1070 card->state = CARD_STATE_RECOVER; 1071 else 1072 card->state = CARD_STATE_DOWN; 1073 mutex_unlock(&card->conf_mutex); 1074 mutex_unlock(&card->discipline_mutex); 1075 return rc; 1076 } 1077 1078 static int qeth_l2_set_online(struct ccwgroup_device *gdev) 1079 { 1080 return __qeth_l2_set_online(gdev, 0); 1081 } 1082 1083 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev, 1084 int recovery_mode) 1085 { 1086 struct qeth_card *card = dev_get_drvdata(&cgdev->dev); 1087 int rc = 0, rc2 = 0, rc3 = 0; 1088 enum qeth_card_states recover_flag; 1089 1090 mutex_lock(&card->discipline_mutex); 1091 mutex_lock(&card->conf_mutex); 1092 QETH_DBF_TEXT(SETUP, 3, "setoffl"); 1093 QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *)); 1094 1095 if (card->dev && netif_carrier_ok(card->dev)) 1096 netif_carrier_off(card->dev); 1097 recover_flag = card->state; 1098 qeth_l2_stop_card(card, recovery_mode); 1099 rc = ccw_device_set_offline(CARD_DDEV(card)); 1100 rc2 = ccw_device_set_offline(CARD_WDEV(card)); 1101 rc3 = ccw_device_set_offline(CARD_RDEV(card)); 1102 if (!rc) 1103 rc = (rc2) ? rc2 : rc3; 1104 if (rc) 1105 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc); 1106 if (recover_flag == CARD_STATE_UP) 1107 card->state = CARD_STATE_RECOVER; 1108 /* let user_space know that device is offline */ 1109 kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE); 1110 mutex_unlock(&card->conf_mutex); 1111 mutex_unlock(&card->discipline_mutex); 1112 return 0; 1113 } 1114 1115 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev) 1116 { 1117 return __qeth_l2_set_offline(cgdev, 0); 1118 } 1119 1120 static int qeth_l2_recover(void *ptr) 1121 { 1122 struct qeth_card *card; 1123 int rc = 0; 1124 1125 card = (struct qeth_card *) ptr; 1126 QETH_CARD_TEXT(card, 2, "recover1"); 1127 if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) 1128 return 0; 1129 QETH_CARD_TEXT(card, 2, "recover2"); 1130 dev_warn(&card->gdev->dev, 1131 "A recovery process has been started for the device\n"); 1132 __qeth_l2_set_offline(card->gdev, 1); 1133 rc = __qeth_l2_set_online(card->gdev, 1); 1134 if (!rc) 1135 dev_info(&card->gdev->dev, 1136 "Device successfully recovered!\n"); 1137 else { 1138 rtnl_lock(); 1139 dev_close(card->dev); 1140 rtnl_unlock(); 1141 dev_warn(&card->gdev->dev, "The qeth device driver " 1142 "failed to recover an error on the device\n"); 1143 } 1144 qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); 1145 qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); 1146 return 0; 1147 } 1148 1149 static int __init qeth_l2_init(void) 1150 { 1151 pr_info("register layer 2 discipline\n"); 1152 return 0; 1153 } 1154 1155 static void __exit qeth_l2_exit(void) 1156 { 1157 pr_info("unregister layer 2 discipline\n"); 1158 } 1159 1160 static void qeth_l2_shutdown(struct ccwgroup_device *gdev) 1161 { 1162 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1163 qeth_qdio_clear_card(card, 0); 1164 qeth_clear_qdio_buffers(card); 1165 } 1166 1167 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev) 1168 { 1169 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1170 1171 if (card->dev) 1172 netif_device_detach(card->dev); 1173 qeth_set_allowed_threads(card, 0, 1); 1174 wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0); 1175 if (gdev->state == CCWGROUP_OFFLINE) 1176 return 0; 1177 if (card->state == CARD_STATE_UP) { 1178 __qeth_l2_set_offline(card->gdev, 1); 1179 } else 1180 __qeth_l2_set_offline(card->gdev, 0); 1181 return 0; 1182 } 1183 1184 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev) 1185 { 1186 struct qeth_card *card = dev_get_drvdata(&gdev->dev); 1187 int rc = 0; 1188 1189 if (gdev->state == CCWGROUP_OFFLINE) 1190 goto out; 1191 1192 if (card->state == CARD_STATE_RECOVER) { 1193 rc = __qeth_l2_set_online(card->gdev, 1); 1194 if (rc) { 1195 rtnl_lock(); 1196 dev_close(card->dev); 1197 rtnl_unlock(); 1198 } 1199 } else 1200 rc = __qeth_l2_set_online(card->gdev, 0); 1201 out: 1202 qeth_set_allowed_threads(card, 0xffffffff, 0); 1203 if (card->dev) 1204 netif_device_attach(card->dev); 1205 if (rc) 1206 dev_warn(&card->gdev->dev, "The qeth device driver " 1207 "failed to recover an error on the device\n"); 1208 return rc; 1209 } 1210 1211 struct ccwgroup_driver qeth_l2_ccwgroup_driver = { 1212 .probe = qeth_l2_probe_device, 1213 .remove = qeth_l2_remove_device, 1214 .set_online = qeth_l2_set_online, 1215 .set_offline = qeth_l2_set_offline, 1216 .shutdown = qeth_l2_shutdown, 1217 .freeze = qeth_l2_pm_suspend, 1218 .thaw = qeth_l2_pm_resume, 1219 .restore = qeth_l2_pm_resume, 1220 }; 1221 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver); 1222 1223 static int qeth_osn_send_control_data(struct qeth_card *card, int len, 1224 struct qeth_cmd_buffer *iob) 1225 { 1226 unsigned long flags; 1227 int rc = 0; 1228 1229 QETH_CARD_TEXT(card, 5, "osndctrd"); 1230 1231 wait_event(card->wait_q, 1232 atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0); 1233 qeth_prepare_control_data(card, len, iob); 1234 QETH_CARD_TEXT(card, 6, "osnoirqp"); 1235 spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags); 1236 rc = ccw_device_start(card->write.ccwdev, &card->write.ccw, 1237 (addr_t) iob, 0, 0); 1238 spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags); 1239 if (rc) { 1240 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: " 1241 "ccw_device_start rc = %i\n", rc); 1242 QETH_CARD_TEXT_(card, 2, " err%d", rc); 1243 qeth_release_buffer(iob->channel, iob); 1244 atomic_set(&card->write.irq_pending, 0); 1245 wake_up(&card->wait_q); 1246 } 1247 return rc; 1248 } 1249 1250 static int qeth_osn_send_ipa_cmd(struct qeth_card *card, 1251 struct qeth_cmd_buffer *iob, int data_len) 1252 { 1253 u16 s1, s2; 1254 1255 QETH_CARD_TEXT(card, 4, "osndipa"); 1256 1257 qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2); 1258 s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len); 1259 s2 = (u16)data_len; 1260 memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2); 1261 memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2); 1262 memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2); 1263 memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2); 1264 return qeth_osn_send_control_data(card, s1, iob); 1265 } 1266 1267 int qeth_osn_assist(struct net_device *dev, void *data, int data_len) 1268 { 1269 struct qeth_cmd_buffer *iob; 1270 struct qeth_card *card; 1271 int rc; 1272 1273 if (!dev) 1274 return -ENODEV; 1275 card = dev->ml_priv; 1276 if (!card) 1277 return -ENODEV; 1278 QETH_CARD_TEXT(card, 2, "osnsdmc"); 1279 if ((card->state != CARD_STATE_UP) && 1280 (card->state != CARD_STATE_SOFTSETUP)) 1281 return -ENODEV; 1282 iob = qeth_wait_for_buffer(&card->write); 1283 memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len); 1284 rc = qeth_osn_send_ipa_cmd(card, iob, data_len); 1285 return rc; 1286 } 1287 EXPORT_SYMBOL(qeth_osn_assist); 1288 1289 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev, 1290 int (*assist_cb)(struct net_device *, void *), 1291 int (*data_cb)(struct sk_buff *)) 1292 { 1293 struct qeth_card *card; 1294 1295 *dev = qeth_l2_netdev_by_devno(read_dev_no); 1296 if (*dev == NULL) 1297 return -ENODEV; 1298 card = (*dev)->ml_priv; 1299 if (!card) 1300 return -ENODEV; 1301 QETH_CARD_TEXT(card, 2, "osnreg"); 1302 if ((assist_cb == NULL) || (data_cb == NULL)) 1303 return -EINVAL; 1304 card->osn_info.assist_cb = assist_cb; 1305 card->osn_info.data_cb = data_cb; 1306 return 0; 1307 } 1308 EXPORT_SYMBOL(qeth_osn_register); 1309 1310 void qeth_osn_deregister(struct net_device *dev) 1311 { 1312 struct qeth_card *card; 1313 1314 if (!dev) 1315 return; 1316 card = dev->ml_priv; 1317 if (!card) 1318 return; 1319 QETH_CARD_TEXT(card, 2, "osndereg"); 1320 card->osn_info.assist_cb = NULL; 1321 card->osn_info.data_cb = NULL; 1322 return; 1323 } 1324 EXPORT_SYMBOL(qeth_osn_deregister); 1325 1326 module_init(qeth_l2_init); 1327 module_exit(qeth_l2_exit); 1328 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); 1329 MODULE_DESCRIPTION("qeth layer 2 discipline"); 1330 MODULE_LICENSE("GPL"); 1331