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