qeth_l2_main.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *    Copyright IBM Corp. 2007, 2009
   4 *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5 *		 Frank Pavlic <fpavlic@de.ibm.com>,
   6 *		 Thomas Spatzier <tspat@de.ibm.com>,
   7 *		 Frank Blaschka <frank.blaschka@de.ibm.com>
   8 */
   9
  10#define pr_fmt(fmt) "qeth: " fmt
  11
  12#include <linux/export.h>
  13#include <linux/module.h>
  14#include <linux/moduleparam.h>
  15#include <linux/string.h>
  16#include <linux/errno.h>
  17#include <linux/kernel.h>
  18#include <linux/slab.h>
  19#include <linux/etherdevice.h>
  20#include <linux/if_bridge.h>
  21#include <linux/list.h>
  22#include <linux/hash.h>
  23#include <linux/hashtable.h>
  24#include <net/switchdev.h>
  25#include <asm/machine.h>
  26#include <asm/chsc.h>
  27#include <asm/css_chars.h>
  28#include <asm/setup.h>
  29#include "qeth_core.h"
  30#include "qeth_l2.h"
  31
  32static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
  33{
  34	int rc;
  35
  36	if (retcode)
  37		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  38	switch (retcode) {
  39	case IPA_RC_SUCCESS:
  40		rc = 0;
  41		break;
  42	case IPA_RC_L2_UNSUPPORTED_CMD:
  43		rc = -EOPNOTSUPP;
  44		break;
  45	case IPA_RC_L2_ADDR_TABLE_FULL:
  46		rc = -ENOSPC;
  47		break;
  48	case IPA_RC_L2_DUP_MAC:
  49	case IPA_RC_L2_DUP_LAYER3_MAC:
  50		rc = -EADDRINUSE;
  51		break;
  52	case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  53	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  54		rc = -EADDRNOTAVAIL;
  55		break;
  56	case IPA_RC_L2_MAC_NOT_FOUND:
  57		rc = -ENOENT;
  58		break;
  59	default:
  60		rc = -EIO;
  61		break;
  62	}
  63	return rc;
  64}
  65
  66static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
  67				     struct qeth_reply *reply,
  68				     unsigned long data)
  69{
  70	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
  71
  72	return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
  73}
  74
  75static int qeth_l2_send_setdelmac(struct qeth_card *card, const __u8 *mac,
  76			   enum qeth_ipa_cmds ipacmd)
  77{
  78	struct qeth_ipa_cmd *cmd;
  79	struct qeth_cmd_buffer *iob;
  80
  81	QETH_CARD_TEXT(card, 2, "L2sdmac");
  82	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
  83				 IPA_DATA_SIZEOF(setdelmac));
  84	if (!iob)
  85		return -ENOMEM;
  86	cmd = __ipa_cmd(iob);
  87	cmd->data.setdelmac.mac_length = ETH_ALEN;
  88	ether_addr_copy(cmd->data.setdelmac.mac, mac);
  89	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
  90}
  91
  92static int qeth_l2_send_setmac(struct qeth_card *card, const __u8 *mac)
  93{
  94	int rc;
  95
  96	QETH_CARD_TEXT(card, 2, "L2Setmac");
  97	rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
  98	if (rc == 0) {
  99		dev_info(&card->gdev->dev,
 100			 "MAC address %pM successfully registered\n", mac);
 101	} else {
 102		switch (rc) {
 103		case -EADDRINUSE:
 104			dev_warn(&card->gdev->dev,
 105				"MAC address %pM already exists\n", mac);
 106			break;
 107		case -EADDRNOTAVAIL:
 108			dev_warn(&card->gdev->dev,
 109				"MAC address %pM is not authorized\n", mac);
 110			break;
 111		}
 112	}
 113	return rc;
 114}
 115
 116static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 117{
 118	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 119					IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 120	int rc;
 121
 122	QETH_CARD_TEXT(card, 2, "L2Wmac");
 123	rc = qeth_l2_send_setdelmac(card, mac, cmd);
 124	if (rc == -EADDRINUSE)
 125		QETH_DBF_MESSAGE(2, "MAC address %012llx is already registered on device %x\n",
 126				 ether_addr_to_u64(mac), CARD_DEVID(card));
 127	else if (rc)
 128		QETH_DBF_MESSAGE(2, "Failed to register MAC address %012llx on device %x: %d\n",
 129				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
 130	return rc;
 131}
 132
 133static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 134{
 135	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 136					IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 137	int rc;
 138
 139	QETH_CARD_TEXT(card, 2, "L2Rmac");
 140	rc = qeth_l2_send_setdelmac(card, mac, cmd);
 141	if (rc)
 142		QETH_DBF_MESSAGE(2, "Failed to delete MAC address %012llx on device %x: %d\n",
 143				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
 144	return rc;
 145}
 146
 147static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
 148{
 149	struct qeth_mac *mac;
 150	struct hlist_node *tmp;
 151	int i;
 152
 153	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 154		hash_del(&mac->hnode);
 155		kfree(mac);
 156	}
 157}
 158
 159static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
 160				struct qeth_hdr *hdr, struct sk_buff *skb,
 161				__be16 proto, unsigned int data_len)
 162{
 163	int cast_type = qeth_get_ether_cast_type(skb);
 164	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 165
 166	hdr->hdr.l2.pkt_length = data_len;
 167
 168	if (skb_is_gso(skb)) {
 169		hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 170	} else {
 171		hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 172		if (skb->ip_summed == CHECKSUM_PARTIAL)
 173			qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], proto);
 174	}
 175
 176	/* set byte byte 3 to casting flags */
 177	if (cast_type == RTN_MULTICAST)
 178		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 179	else if (cast_type == RTN_BROADCAST)
 180		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 181	else
 182		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 183
 184	/* VSWITCH relies on the VLAN
 185	 * information to be present in
 186	 * the QDIO header */
 187	if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
 188		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 189		hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 190	}
 191}
 192
 193static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
 194{
 195	if (retcode)
 196		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 197
 198	switch (retcode) {
 199	case IPA_RC_SUCCESS:
 200		return 0;
 201	case IPA_RC_L2_INVALID_VLAN_ID:
 202		return -EINVAL;
 203	case IPA_RC_L2_DUP_VLAN_ID:
 204		return -EEXIST;
 205	case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 206		return -ENOENT;
 207	case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 208		return -EPERM;
 209	default:
 210		return -EIO;
 211	}
 212}
 213
 214static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 215				      struct qeth_reply *reply,
 216				      unsigned long data)
 217{
 218	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 219
 220	QETH_CARD_TEXT(card, 2, "L2sdvcb");
 221	if (cmd->hdr.return_code) {
 222		QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 223				 cmd->data.setdelvlan.vlan_id,
 224				 CARD_DEVID(card), cmd->hdr.return_code);
 225		QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 226	}
 227	return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
 228}
 229
 230static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 231				   enum qeth_ipa_cmds ipacmd)
 232{
 233	struct qeth_ipa_cmd *cmd;
 234	struct qeth_cmd_buffer *iob;
 235
 236	QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 237	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
 238				 IPA_DATA_SIZEOF(setdelvlan));
 239	if (!iob)
 240		return -ENOMEM;
 241	cmd = __ipa_cmd(iob);
 242	cmd->data.setdelvlan.vlan_id = i;
 243	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
 244}
 245
 246static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 247				   __be16 proto, u16 vid)
 248{
 249	struct qeth_card *card = dev->ml_priv;
 250
 251	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 252	if (!vid)
 253		return 0;
 254
 255	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 256}
 257
 258static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 259				    __be16 proto, u16 vid)
 260{
 261	struct qeth_card *card = dev->ml_priv;
 262
 263	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 264	if (!vid)
 265		return 0;
 266
 267	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 268}
 269
 270static void qeth_l2_set_pnso_mode(struct qeth_card *card,
 271				  enum qeth_pnso_mode mode)
 272{
 273	spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 274	WRITE_ONCE(card->info.pnso_mode, mode);
 275	spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 276
 277	if (mode == QETH_PNSO_NONE)
 278		drain_workqueue(card->event_wq);
 279}
 280
 281static void qeth_l2_dev2br_fdb_flush(struct qeth_card *card)
 282{
 283	struct switchdev_notifier_fdb_info info = {};
 284
 285	QETH_CARD_TEXT(card, 2, "fdbflush");
 286
 287	info.addr = NULL;
 288	/* flush all VLANs: */
 289	info.vid = 0;
 290	info.added_by_user = false;
 291	info.offloaded = true;
 292
 293	call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
 294				 card->dev, &info.info, NULL);
 295}
 296
 297static int qeth_l2_request_initial_mac(struct qeth_card *card)
 298{
 299	int rc = 0;
 300
 301	QETH_CARD_TEXT(card, 2, "l2reqmac");
 302
 303	if (machine_is_vm()) {
 304		rc = qeth_vm_request_mac(card);
 305		if (!rc)
 306			goto out;
 307		QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
 308				 CARD_DEVID(card), rc);
 309		QETH_CARD_TEXT_(card, 2, "err%04x", rc);
 310		/* fall back to alternative mechanism: */
 311	}
 312
 313	rc = qeth_setadpparms_change_macaddr(card);
 314	if (!rc)
 315		goto out;
 316	QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
 317			 CARD_DEVID(card), rc);
 318	QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
 319
 320	/* Fall back once more, but some devices don't support a custom MAC
 321	 * address:
 322	 */
 323	if (IS_OSM(card) || IS_OSX(card))
 324		return (rc) ? rc : -EADDRNOTAVAIL;
 325	eth_hw_addr_random(card->dev);
 326
 327out:
 328	QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
 329	return 0;
 330}
 331
 332static void qeth_l2_register_dev_addr(struct qeth_card *card)
 333{
 334	if (!is_valid_ether_addr(card->dev->dev_addr))
 335		qeth_l2_request_initial_mac(card);
 336
 337	if (!qeth_l2_send_setmac(card, card->dev->dev_addr))
 338		card->info.dev_addr_is_registered = 1;
 339	else
 340		card->info.dev_addr_is_registered = 0;
 341}
 342
 343static int qeth_l2_validate_addr(struct net_device *dev)
 344{
 345	struct qeth_card *card = dev->ml_priv;
 346
 347	if (card->info.dev_addr_is_registered)
 348		return eth_validate_addr(dev);
 349
 350	QETH_CARD_TEXT(card, 4, "nomacadr");
 351	return -EPERM;
 352}
 353
 354static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 355{
 356	struct sockaddr *addr = p;
 357	struct qeth_card *card = dev->ml_priv;
 358	u8 old_addr[ETH_ALEN];
 359	int rc = 0;
 360
 361	QETH_CARD_TEXT(card, 3, "setmac");
 362
 363	if (IS_OSM(card) || IS_OSX(card)) {
 364		QETH_CARD_TEXT(card, 3, "setmcTYP");
 365		return -EOPNOTSUPP;
 366	}
 367	QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 368	if (!is_valid_ether_addr(addr->sa_data))
 369		return -EADDRNOTAVAIL;
 370
 371	/* don't register the same address twice */
 372	if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 373	    card->info.dev_addr_is_registered)
 374		return 0;
 375
 376	/* add the new address, switch over, drop the old */
 377	rc = qeth_l2_send_setmac(card, addr->sa_data);
 378	if (rc)
 379		return rc;
 380	ether_addr_copy(old_addr, dev->dev_addr);
 381	eth_hw_addr_set(dev, addr->sa_data);
 382
 383	if (card->info.dev_addr_is_registered)
 384		qeth_l2_remove_mac(card, old_addr);
 385	card->info.dev_addr_is_registered = 1;
 386	return 0;
 387}
 388
 389static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
 390{
 391	int role;
 392	int rc;
 393
 394	QETH_CARD_TEXT(card, 3, "pmisc2br");
 395
 396	if (enable) {
 397		if (card->options.sbp.reflect_promisc_primary)
 398			role = QETH_SBP_ROLE_PRIMARY;
 399		else
 400			role = QETH_SBP_ROLE_SECONDARY;
 401	} else
 402		role = QETH_SBP_ROLE_NONE;
 403
 404	rc = qeth_bridgeport_setrole(card, role);
 405	QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
 406	if (!rc) {
 407		card->options.sbp.role = role;
 408		card->info.promisc_mode = enable;
 409	}
 410}
 411
 412static void qeth_l2_set_promisc_mode(struct qeth_card *card)
 413{
 414	bool enable = card->dev->flags & IFF_PROMISC;
 415
 416	if (card->info.promisc_mode == enable)
 417		return;
 418
 419	if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
 420		qeth_setadp_promisc_mode(card, enable);
 421	} else {
 422		mutex_lock(&card->sbp_lock);
 423		if (card->options.sbp.reflect_promisc)
 424			qeth_l2_promisc_to_bridge(card, enable);
 425		mutex_unlock(&card->sbp_lock);
 426	}
 427}
 428
 429/* New MAC address is added to the hash table and marked to be written on card
 430 * only if there is not in the hash table storage already
 431 *
 432*/
 433static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 434{
 435	u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 436	struct qeth_mac *mac;
 437
 438	hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
 439		if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 440			mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 441			return;
 442		}
 443	}
 444
 445	mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 446	if (!mac)
 447		return;
 448
 449	ether_addr_copy(mac->mac_addr, ha->addr);
 450	mac->disp_flag = QETH_DISP_ADDR_ADD;
 451
 452	hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
 453}
 454
 455static void qeth_l2_rx_mode_work(struct work_struct *work)
 456{
 457	struct qeth_card *card = container_of(work, struct qeth_card,
 458					      rx_mode_work);
 459	struct net_device *dev = card->dev;
 460	struct netdev_hw_addr *ha;
 461	struct qeth_mac *mac;
 462	struct hlist_node *tmp;
 463	int i;
 464	int rc;
 465
 466	QETH_CARD_TEXT(card, 3, "setmulti");
 467
 468	netif_addr_lock_bh(dev);
 469	netdev_for_each_mc_addr(ha, dev)
 470		qeth_l2_add_mac(card, ha);
 471	netdev_for_each_uc_addr(ha, dev)
 472		qeth_l2_add_mac(card, ha);
 473	netif_addr_unlock_bh(dev);
 474
 475	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 476		switch (mac->disp_flag) {
 477		case QETH_DISP_ADDR_DELETE:
 478			qeth_l2_remove_mac(card, mac->mac_addr);
 479			hash_del(&mac->hnode);
 480			kfree(mac);
 481			break;
 482		case QETH_DISP_ADDR_ADD:
 483			rc = qeth_l2_write_mac(card, mac->mac_addr);
 484			if (rc) {
 485				hash_del(&mac->hnode);
 486				kfree(mac);
 487				break;
 488			}
 489			fallthrough;
 490		default:
 491			/* for next call to set_rx_mode(): */
 492			mac->disp_flag = QETH_DISP_ADDR_DELETE;
 493		}
 494	}
 495
 496	qeth_l2_set_promisc_mode(card);
 497}
 498
 499static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 500					   struct net_device *dev)
 501{
 502	struct qeth_card *card = dev->ml_priv;
 503	u16 txq = skb_get_queue_mapping(skb);
 504	struct qeth_qdio_out_q *queue;
 505	int rc;
 506
 507	if (!skb_is_gso(skb))
 508		qdisc_skb_cb(skb)->pkt_len = skb->len;
 509	if (IS_IQD(card))
 510		txq = qeth_iqd_translate_txq(dev, txq);
 511	queue = card->qdio.out_qs[txq];
 512
 513	rc = qeth_xmit(card, skb, queue, vlan_get_protocol(skb),
 514		       qeth_l2_fill_header);
 515	if (!rc)
 516		return NETDEV_TX_OK;
 517
 518	QETH_TXQ_STAT_INC(queue, tx_dropped);
 519	kfree_skb(skb);
 520	return NETDEV_TX_OK;
 521}
 522
 523static u16 qeth_l2_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
 524				    struct net_device *sb_dev)
 525{
 526	return qeth_iqd_select_queue(dev, skb, qeth_get_ether_cast_type(skb),
 527				     sb_dev);
 528}
 529
 530static void qeth_l2_set_rx_mode(struct net_device *dev)
 531{
 532	struct qeth_card *card = dev->ml_priv;
 533
 534	schedule_work(&card->rx_mode_work);
 535}
 536
 537/**
 538 *	qeth_l2_pnso() - perform network subchannel operation
 539 *	@card: qeth_card structure pointer
 540 *	@oc: Operation Code
 541 *	@cnc: Boolean Change-Notification Control
 542 *	@cb: Callback function will be executed for each element
 543 *		of the address list
 544 *	@priv: Pointer to pass to the callback function.
 545 *
 546 *	Collects network information in a network address list and calls the
 547 *	callback function for every entry in the list. If "change-notification-
 548 *	control" is set, further changes in the address list will be reported
 549 *	via the IPA command.
 550 */
 551static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
 552			void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
 553			void *priv)
 554{
 555	struct ccw_device *ddev = CARD_DDEV(card);
 556	struct chsc_pnso_area *rr;
 557	u32 prev_instance = 0;
 558	int isfirstblock = 1;
 559	int i, size, elems;
 560	int rc;
 561
 562	rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
 563	if (rr == NULL)
 564		return -ENOMEM;
 565	do {
 566		QETH_CARD_TEXT(card, 2, "PNSO");
 567		/* on the first iteration, naihdr.resume_token will be zero */
 568		rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
 569				     cnc);
 570		if (rc)
 571			continue;
 572		if (cb == NULL)
 573			continue;
 574
 575		size = rr->naihdr.naids;
 576		if (size != sizeof(struct chsc_pnso_naid_l2)) {
 577			WARN_ON_ONCE(1);
 578			continue;
 579		}
 580
 581		elems = (rr->response.length - sizeof(struct chsc_header) -
 582			 sizeof(struct chsc_pnso_naihdr)) / size;
 583
 584		if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
 585			/* Inform the caller that they need to scrap */
 586			/* the data that was already reported via cb */
 587			rc = -EAGAIN;
 588			break;
 589		}
 590		isfirstblock = 0;
 591		prev_instance = rr->naihdr.instance;
 592		for (i = 0; i < elems; i++)
 593			(*cb)(priv, &rr->entries[i]);
 594	} while ((rc == -EBUSY) || (!rc && /* list stored */
 595		   /* resume token is non-zero => list incomplete */
 596		   (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
 597
 598	if (rc)
 599		QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
 600
 601	free_page((unsigned long)rr);
 602	return rc;
 603}
 604
 605static bool qeth_is_my_net_if_token(struct qeth_card *card,
 606				    struct net_if_token *token)
 607{
 608	return ((card->info.ddev_devno == token->devnum) &&
 609		(card->info.cssid == token->cssid) &&
 610		(card->info.iid == token->iid) &&
 611		(card->info.ssid == token->ssid) &&
 612		(card->info.chpid == token->chpid) &&
 613		(card->info.chid == token->chid));
 614}
 615
 616/**
 617 *	qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
 618 *	@card:	qeth_card structure pointer
 619 *	@code:	event bitmask: high order bit 0x80 set to
 620 *				1 - removal of an object
 621 *				0 - addition of an object
 622 *			       Object type(s):
 623 *				0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
 624 *	@token: "network token" structure identifying 'physical' location
 625 *		of the target
 626 *	@addr_lnid: structure with MAC address and VLAN ID of the target
 627 */
 628static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
 629				      struct net_if_token *token,
 630				      struct mac_addr_lnid *addr_lnid)
 631{
 632	struct switchdev_notifier_fdb_info info = {};
 633	u8 ntfy_mac[ETH_ALEN];
 634
 635	ether_addr_copy(ntfy_mac, addr_lnid->mac);
 636	/* Ignore VLAN only changes */
 637	if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
 638		return;
 639	/* Ignore mcast entries */
 640	if (is_multicast_ether_addr(ntfy_mac))
 641		return;
 642	/* Ignore my own addresses */
 643	if (qeth_is_my_net_if_token(card, token))
 644		return;
 645
 646	info.addr = ntfy_mac;
 647	/* don't report VLAN IDs */
 648	info.vid = 0;
 649	info.added_by_user = false;
 650	info.offloaded = true;
 651
 652	if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
 653		call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
 654					 card->dev, &info.info, NULL);
 655		QETH_CARD_TEXT(card, 4, "andelmac");
 656		QETH_CARD_TEXT_(card, 4,
 657				"mc%012llx", ether_addr_to_u64(ntfy_mac));
 658	} else {
 659		call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
 660					 card->dev, &info.info, NULL);
 661		QETH_CARD_TEXT(card, 4, "anaddmac");
 662		QETH_CARD_TEXT_(card, 4,
 663				"mc%012llx", ether_addr_to_u64(ntfy_mac));
 664	}
 665}
 666
 667static void qeth_l2_dev2br_an_set_cb(void *priv,
 668				     struct chsc_pnso_naid_l2 *entry)
 669{
 670	u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
 671	struct qeth_card *card = priv;
 672
 673	if (entry->addr_lnid.lnid < VLAN_N_VID)
 674		code |= IPA_ADDR_CHANGE_CODE_VLANID;
 675	qeth_l2_dev2br_fdb_notify(card, code,
 676				  (struct net_if_token *)&entry->nit,
 677				  (struct mac_addr_lnid *)&entry->addr_lnid);
 678}
 679
 680/**
 681 *	qeth_l2_dev2br_an_set() -
 682 *	Enable or disable 'dev to bridge network address notification'
 683 *	@card: qeth_card structure pointer
 684 *	@enable: Enable or disable 'dev to bridge network address notification'
 685 *
 686 *	Returns negative errno-compatible error indication or 0 on success.
 687 *
 688 *	On enable, emits a series of address notifications for all
 689 *	currently registered hosts.
 690 */
 691static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
 692{
 693	int rc;
 694
 695	if (enable) {
 696		QETH_CARD_TEXT(card, 2, "anseton");
 697		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
 698				  qeth_l2_dev2br_an_set_cb, card);
 699		if (rc == -EAGAIN)
 700			/* address notification enabled, but inconsistent
 701			 * addresses reported -> disable address notification
 702			 */
 703			qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
 704				     NULL, NULL);
 705	} else {
 706		QETH_CARD_TEXT(card, 2, "ansetoff");
 707		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
 708	}
 709
 710	return rc;
 711}
 712
 713struct qeth_l2_br2dev_event_work {
 714	struct work_struct work;
 715	struct net_device *br_dev;
 716	struct net_device *lsync_dev;
 717	struct net_device *dst_dev;
 718	unsigned long event;
 719	unsigned char addr[ETH_ALEN];
 720};
 721
 722static const struct net_device_ops qeth_l2_iqd_netdev_ops;
 723static const struct net_device_ops qeth_l2_osa_netdev_ops;
 724
 725static bool qeth_l2_must_learn(struct net_device *netdev,
 726			       struct net_device *dstdev)
 727{
 728	struct qeth_priv *priv;
 729
 730	priv = netdev_priv(netdev);
 731	return (netdev != dstdev &&
 732		(priv->brport_features & BR_LEARNING_SYNC) &&
 733		!(br_port_flag_is_set(netdev, BR_ISOLATED) &&
 734		  br_port_flag_is_set(dstdev, BR_ISOLATED)) &&
 735		(netdev->netdev_ops == &qeth_l2_iqd_netdev_ops ||
 736		 netdev->netdev_ops == &qeth_l2_osa_netdev_ops));
 737}
 738
 739/**
 740 *	qeth_l2_br2dev_worker() - update local MACs
 741 *	@work: bridge to device FDB update
 742 *
 743 *	Update local MACs of a learning_sync bridgeport so it can receive
 744 *	messages for a destination port.
 745 *	In case of an isolated learning_sync port, also update its isolated
 746 *	siblings.
 747 */
 748static void qeth_l2_br2dev_worker(struct work_struct *work)
 749{
 750	struct qeth_l2_br2dev_event_work *br2dev_event_work =
 751		container_of(work, struct qeth_l2_br2dev_event_work, work);
 752	struct net_device *lsyncdev = br2dev_event_work->lsync_dev;
 753	struct net_device *dstdev = br2dev_event_work->dst_dev;
 754	struct net_device *brdev = br2dev_event_work->br_dev;
 755	unsigned long event = br2dev_event_work->event;
 756	unsigned char *addr = br2dev_event_work->addr;
 757	struct qeth_card *card = lsyncdev->ml_priv;
 758	struct net_device *lowerdev;
 759	struct list_head *iter;
 760	int err = 0;
 761
 762	QETH_CARD_TEXT_(card, 4, "b2dw%04lx", event);
 763	QETH_CARD_TEXT_(card, 4, "ma%012llx", ether_addr_to_u64(addr));
 764
 765	rcu_read_lock();
 766	/* Verify preconditions are still valid: */
 767	if (!netif_is_bridge_port(lsyncdev) ||
 768	    brdev != netdev_master_upper_dev_get_rcu(lsyncdev))
 769		goto unlock;
 770	if (!qeth_l2_must_learn(lsyncdev, dstdev))
 771		goto unlock;
 772
 773	if (br_port_flag_is_set(lsyncdev, BR_ISOLATED)) {
 774		/* Update lsyncdev and its isolated sibling(s): */
 775		iter = &brdev->adj_list.lower;
 776		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
 777		while (lowerdev) {
 778			if (br_port_flag_is_set(lowerdev, BR_ISOLATED)) {
 779				switch (event) {
 780				case SWITCHDEV_FDB_ADD_TO_DEVICE:
 781					err = dev_uc_add(lowerdev, addr);
 782					break;
 783				case SWITCHDEV_FDB_DEL_TO_DEVICE:
 784					err = dev_uc_del(lowerdev, addr);
 785					break;
 786				default:
 787					break;
 788				}
 789				if (err) {
 790					QETH_CARD_TEXT(card, 2, "b2derris");
 791					QETH_CARD_TEXT_(card, 2,
 792							"err%02lx%03d", event,
 793							lowerdev->ifindex);
 794				}
 795			}
 796			lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
 797		}
 798	} else {
 799		switch (event) {
 800		case SWITCHDEV_FDB_ADD_TO_DEVICE:
 801			err = dev_uc_add(lsyncdev, addr);
 802			break;
 803		case SWITCHDEV_FDB_DEL_TO_DEVICE:
 804			err = dev_uc_del(lsyncdev, addr);
 805			break;
 806		default:
 807			break;
 808		}
 809		if (err)
 810			QETH_CARD_TEXT_(card, 2, "b2derr%02lx", event);
 811	}
 812
 813unlock:
 814	rcu_read_unlock();
 815	dev_put(brdev);
 816	dev_put(lsyncdev);
 817	dev_put(dstdev);
 818	kfree(br2dev_event_work);
 819}
 820
 821static int qeth_l2_br2dev_queue_work(struct net_device *brdev,
 822				     struct net_device *lsyncdev,
 823				     struct net_device *dstdev,
 824				     unsigned long event,
 825				     const unsigned char *addr)
 826{
 827	struct qeth_l2_br2dev_event_work *worker_data;
 828	struct qeth_card *card;
 829
 830	worker_data = kzalloc(sizeof(*worker_data), GFP_ATOMIC);
 831	if (!worker_data)
 832		return -ENOMEM;
 833	INIT_WORK(&worker_data->work, qeth_l2_br2dev_worker);
 834	worker_data->br_dev = brdev;
 835	worker_data->lsync_dev = lsyncdev;
 836	worker_data->dst_dev = dstdev;
 837	worker_data->event = event;
 838	ether_addr_copy(worker_data->addr, addr);
 839
 840	card = lsyncdev->ml_priv;
 841	/* Take a reference on the sw port devices and the bridge */
 842	dev_hold(brdev);
 843	dev_hold(lsyncdev);
 844	dev_hold(dstdev);
 845	queue_work(card->event_wq, &worker_data->work);
 846	return 0;
 847}
 848
 849/* Called under rtnl_lock */
 850static int qeth_l2_switchdev_event(struct notifier_block *unused,
 851				   unsigned long event, void *ptr)
 852{
 853	struct net_device *dstdev, *brdev, *lowerdev;
 854	struct switchdev_notifier_fdb_info *fdb_info;
 855	struct switchdev_notifier_info *info = ptr;
 856	struct list_head *iter;
 857	struct qeth_card *card;
 858	int rc;
 859
 860	if (!(event == SWITCHDEV_FDB_ADD_TO_DEVICE ||
 861	      event == SWITCHDEV_FDB_DEL_TO_DEVICE))
 862		return NOTIFY_DONE;
 863
 864	dstdev = switchdev_notifier_info_to_dev(info);
 865	brdev = netdev_master_upper_dev_get_rcu(dstdev);
 866	if (!brdev || !netif_is_bridge_master(brdev))
 867		return NOTIFY_DONE;
 868	fdb_info = container_of(info,
 869				struct switchdev_notifier_fdb_info,
 870				info);
 871	iter = &brdev->adj_list.lower;
 872	lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
 873	while (lowerdev) {
 874		if (qeth_l2_must_learn(lowerdev, dstdev)) {
 875			card = lowerdev->ml_priv;
 876			QETH_CARD_TEXT_(card, 4, "b2dqw%03lx", event);
 877			rc = qeth_l2_br2dev_queue_work(brdev, lowerdev,
 878						       dstdev, event,
 879						       fdb_info->addr);
 880			if (rc) {
 881				QETH_CARD_TEXT(card, 2, "b2dqwerr");
 882				return NOTIFY_BAD;
 883			}
 884		}
 885		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
 886	}
 887	return NOTIFY_DONE;
 888}
 889
 890static struct notifier_block qeth_l2_sw_notifier = {
 891		.notifier_call = qeth_l2_switchdev_event,
 892};
 893
 894static refcount_t qeth_l2_switchdev_notify_refcnt;
 895
 896/* Called under rtnl_lock */
 897static void qeth_l2_br2dev_get(void)
 898{
 899	int rc;
 900
 901	if (!refcount_inc_not_zero(&qeth_l2_switchdev_notify_refcnt)) {
 902		rc = register_switchdev_notifier(&qeth_l2_sw_notifier);
 903		if (rc) {
 904			QETH_DBF_MESSAGE(2,
 905					 "failed to register qeth_l2_sw_notifier: %d\n",
 906					 rc);
 907		} else {
 908			refcount_set(&qeth_l2_switchdev_notify_refcnt, 1);
 909			QETH_DBF_MESSAGE(2, "qeth_l2_sw_notifier registered\n");
 910		}
 911	}
 912	QETH_DBF_TEXT_(SETUP, 2, "b2d+%04d",
 913		       qeth_l2_switchdev_notify_refcnt.refs.counter);
 914}
 915
 916/* Called under rtnl_lock */
 917static void qeth_l2_br2dev_put(void)
 918{
 919	int rc;
 920
 921	if (refcount_dec_and_test(&qeth_l2_switchdev_notify_refcnt)) {
 922		rc = unregister_switchdev_notifier(&qeth_l2_sw_notifier);
 923		if (rc) {
 924			QETH_DBF_MESSAGE(2,
 925					 "failed to unregister qeth_l2_sw_notifier: %d\n",
 926					 rc);
 927		} else {
 928			QETH_DBF_MESSAGE(2,
 929					 "qeth_l2_sw_notifier unregistered\n");
 930		}
 931	}
 932	QETH_DBF_TEXT_(SETUP, 2, "b2d-%04d",
 933		       qeth_l2_switchdev_notify_refcnt.refs.counter);
 934}
 935
 936static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 937				  struct net_device *dev, u32 filter_mask,
 938				  int nlflags)
 939{
 940	struct qeth_priv *priv = netdev_priv(dev);
 941	struct qeth_card *card = dev->ml_priv;
 942	u16 mode = BRIDGE_MODE_UNDEF;
 943
 944	/* Do not even show qeth devs that cannot do bridge_setlink */
 945	if (!priv->brport_hw_features || !netif_device_present(dev) ||
 946	    qeth_bridgeport_is_in_use(card))
 947		return -EOPNOTSUPP;
 948
 949	return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
 950				       mode, priv->brport_features,
 951				       priv->brport_hw_features,
 952				       nlflags, filter_mask, NULL);
 953}
 954
 955static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
 956	[IFLA_BRPORT_LEARNING_SYNC]	= { .type = NLA_U8 },
 957};
 958
 959/**
 960 *	qeth_l2_bridge_setlink() - set bridgeport attributes
 961 *	@dev: netdevice
 962 *	@nlh: netlink message header
 963 *	@flags: bridge flags (here: BRIDGE_FLAGS_SELF)
 964 *	@extack: extended ACK report struct
 965 *
 966 *	Called under rtnl_lock
 967 */
 968static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 969				  u16 flags, struct netlink_ext_ack *extack)
 970{
 971	struct qeth_priv *priv = netdev_priv(dev);
 972	struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
 973	struct qeth_card *card = dev->ml_priv;
 974	struct nlattr *attr, *nested_attr;
 975	bool enable, has_protinfo = false;
 976	int rem1, rem2;
 977	int rc;
 978
 979	if (!netif_device_present(dev))
 980		return -ENODEV;
 981
 982	nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
 983		if (nla_type(attr) == IFLA_PROTINFO) {
 984			rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
 985					      qeth_brport_policy, extack);
 986			if (rc)
 987				return rc;
 988			has_protinfo = true;
 989		} else if (nla_type(attr) == IFLA_AF_SPEC) {
 990			nla_for_each_nested(nested_attr, attr, rem2) {
 991				if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
 992					continue;
 993				NL_SET_ERR_MSG_ATTR(extack, nested_attr,
 994						    "Unsupported attribute");
 995				return -EINVAL;
 996			}
 997		} else {
 998			NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
 999			return -EINVAL;
1000		}
1001	}
1002	if (!has_protinfo)
1003		return 0;
1004	if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
1005		return -EINVAL;
1006	if (!(priv->brport_hw_features & BR_LEARNING_SYNC)) {
1007		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
1008				    "Operation not supported by HW");
1009		return -EOPNOTSUPP;
1010	}
1011	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV)) {
1012		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
1013				    "Requires NET_SWITCHDEV");
1014		return -EOPNOTSUPP;
1015	}
1016	enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
1017
1018	if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
1019		return 0;
1020
1021	mutex_lock(&card->sbp_lock);
1022	/* do not change anything if BridgePort is enabled */
1023	if (qeth_bridgeport_is_in_use(card)) {
1024		NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
1025		rc = -EBUSY;
1026	} else if (enable) {
1027		qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1028		rc = qeth_l2_dev2br_an_set(card, true);
1029		if (rc) {
1030			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1031		} else {
1032			priv->brport_features |= BR_LEARNING_SYNC;
1033			qeth_l2_br2dev_get();
1034		}
1035	} else {
1036		rc = qeth_l2_dev2br_an_set(card, false);
1037		if (!rc) {
1038			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1039			priv->brport_features ^= BR_LEARNING_SYNC;
1040			qeth_l2_dev2br_fdb_flush(card);
1041			qeth_l2_br2dev_put();
1042		}
1043	}
1044	mutex_unlock(&card->sbp_lock);
1045
1046	return rc;
1047}
1048
1049static const struct net_device_ops qeth_l2_iqd_netdev_ops = {
1050	.ndo_open		= qeth_open,
1051	.ndo_stop		= qeth_stop,
1052	.ndo_get_stats64	= qeth_get_stats64,
1053	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
1054	.ndo_features_check	= qeth_features_check,
1055	.ndo_select_queue	= qeth_l2_iqd_select_queue,
1056	.ndo_validate_addr	= qeth_l2_validate_addr,
1057	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
1058	.ndo_eth_ioctl		= qeth_do_ioctl,
1059	.ndo_siocdevprivate	= qeth_siocdevprivate,
1060	.ndo_set_mac_address	= qeth_l2_set_mac_address,
1061	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
1062	.ndo_vlan_rx_kill_vid	= qeth_l2_vlan_rx_kill_vid,
1063	.ndo_tx_timeout		= qeth_tx_timeout,
1064	.ndo_fix_features	= qeth_fix_features,
1065	.ndo_set_features	= qeth_set_features,
1066	.ndo_bridge_getlink	= qeth_l2_bridge_getlink,
1067	.ndo_bridge_setlink	= qeth_l2_bridge_setlink,
1068};
1069
1070static const struct net_device_ops qeth_l2_osa_netdev_ops = {
1071	.ndo_open		= qeth_open,
1072	.ndo_stop		= qeth_stop,
1073	.ndo_get_stats64	= qeth_get_stats64,
1074	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
1075	.ndo_features_check	= qeth_features_check,
1076	.ndo_select_queue	= qeth_osa_select_queue,
1077	.ndo_validate_addr	= qeth_l2_validate_addr,
1078	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
1079	.ndo_eth_ioctl		= qeth_do_ioctl,
1080	.ndo_siocdevprivate	= qeth_siocdevprivate,
1081	.ndo_set_mac_address    = qeth_l2_set_mac_address,
1082	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
1083	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1084	.ndo_tx_timeout		= qeth_tx_timeout,
1085	.ndo_fix_features	= qeth_fix_features,
1086	.ndo_set_features	= qeth_set_features,
1087};
1088
1089static int qeth_l2_setup_netdev(struct qeth_card *card)
1090{
1091	card->dev->netdev_ops = IS_IQD(card) ? &qeth_l2_iqd_netdev_ops :
1092					       &qeth_l2_osa_netdev_ops;
1093	card->dev->needed_headroom = sizeof(struct qeth_hdr);
1094	card->dev->priv_flags |= IFF_UNICAST_FLT;
1095
1096	if (IS_OSM(card)) {
1097		card->dev->features |= NETIF_F_VLAN_CHALLENGED;
1098	} else {
1099		if (!IS_VM_NIC(card))
1100			card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1101		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1102	}
1103
1104	if (IS_OSD(card) && !IS_VM_NIC(card)) {
1105		card->dev->features |= NETIF_F_SG;
1106		/* OSA 3S and earlier has no RX/TX support */
1107		if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1108			card->dev->hw_features |= NETIF_F_IP_CSUM;
1109			card->dev->vlan_features |= NETIF_F_IP_CSUM;
1110		}
1111	}
1112	if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1113		card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1114		card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1115	}
1116	if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
1117	    qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
1118		card->dev->hw_features |= NETIF_F_RXCSUM;
1119		card->dev->vlan_features |= NETIF_F_RXCSUM;
1120	}
1121	if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
1122		card->dev->hw_features |= NETIF_F_TSO;
1123		card->dev->vlan_features |= NETIF_F_TSO;
1124	}
1125	if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1126		card->dev->hw_features |= NETIF_F_TSO6;
1127		card->dev->vlan_features |= NETIF_F_TSO6;
1128	}
1129
1130	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1131		card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
1132		netif_keep_dst(card->dev);
1133		netif_set_tso_max_size(card->dev,
1134				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
1135	}
1136
1137	netif_napi_add(card->dev, &card->napi, qeth_poll);
1138	return register_netdev(card->dev);
1139}
1140
1141static void qeth_l2_trace_features(struct qeth_card *card)
1142{
1143	/* Set BridgePort features */
1144	QETH_CARD_TEXT(card, 2, "featuSBP");
1145	QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1146		      sizeof(card->options.sbp.supported_funcs));
1147	/* VNIC Characteristics features */
1148	QETH_CARD_TEXT(card, 2, "feaVNICC");
1149	QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1150		      sizeof(card->options.vnicc.sup_chars));
1151}
1152
1153static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
1154{
1155	if (!card->options.sbp.reflect_promisc &&
1156	    card->options.sbp.role != QETH_SBP_ROLE_NONE) {
1157		/* Conditional to avoid spurious error messages */
1158		qeth_bridgeport_setrole(card, card->options.sbp.role);
1159		/* Let the callback function refresh the stored role value. */
1160		qeth_bridgeport_query_ports(card, &card->options.sbp.role,
1161					    NULL);
1162	}
1163	if (card->options.sbp.hostnotification) {
1164		if (qeth_bridgeport_an_set(card, 1))
1165			card->options.sbp.hostnotification = 0;
1166	}
1167}
1168
1169/**
1170 *	qeth_l2_detect_dev2br_support() -
1171 *	Detect whether this card supports 'dev to bridge fdb network address
1172 *	change notification' and thus can support the learning_sync bridgeport
1173 *	attribute
1174 *	@card: qeth_card structure pointer
1175 */
1176static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
1177{
1178	struct qeth_priv *priv = netdev_priv(card->dev);
1179	bool dev2br_supported;
1180
1181	QETH_CARD_TEXT(card, 2, "d2brsup");
1182	if (!IS_IQD(card))
1183		return;
1184
1185	/* dev2br requires valid cssid,iid,chid */
1186	dev2br_supported = card->info.ids_valid &&
1187			   css_general_characteristics.enarf;
1188	QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1189
1190	if (dev2br_supported)
1191		priv->brport_hw_features |= BR_LEARNING_SYNC;
1192	else
1193		priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1194}
1195
1196static void qeth_l2_enable_brport_features(struct qeth_card *card)
1197{
1198	struct qeth_priv *priv = netdev_priv(card->dev);
1199	int rc;
1200
1201	if (priv->brport_features & BR_LEARNING_SYNC) {
1202		if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1203			qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1204			rc = qeth_l2_dev2br_an_set(card, true);
1205			if (rc == -EAGAIN) {
1206				/* Recoverable error, retry once */
1207				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1208				qeth_l2_dev2br_fdb_flush(card);
1209				qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1210				rc = qeth_l2_dev2br_an_set(card, true);
1211			}
1212			if (rc) {
1213				netdev_err(card->dev,
1214					   "failed to enable bridge learning_sync: %d\n",
1215					   rc);
1216				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1217				qeth_l2_dev2br_fdb_flush(card);
1218				priv->brport_features ^= BR_LEARNING_SYNC;
1219			}
1220		} else {
1221			dev_warn(&card->gdev->dev,
1222				"bridge learning_sync not supported\n");
1223			priv->brport_features ^= BR_LEARNING_SYNC;
1224		}
1225	}
1226}
1227
1228/* SETBRIDGEPORT support, async notifications */
1229
1230enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1231
1232/**
1233 * qeth_bridge_emit_host_event() - bridgeport address change notification
1234 * @card:  qeth_card structure pointer, for udev events.
1235 * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1236 *	      and reset token and addr_lnid are unused and may be NULL.
1237 * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1238 *			  object, 0 - addition of an object.
1239 *			  0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1240 * @token: "network token" structure identifying physical address of the port.
1241 * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1242 *
1243 * This function is called when registrations and deregistrations are
1244 * reported by the hardware, and also when notifications are enabled -
1245 * for all currently registered addresses.
1246 */
1247static void qeth_bridge_emit_host_event(struct qeth_card *card,
1248					enum qeth_an_event_type evtype,
1249					u8 code,
1250					struct net_if_token *token,
1251					struct mac_addr_lnid *addr_lnid)
1252{
1253	char str[7][32];
1254	char *env[8];
1255	int i = 0;
1256
1257	switch (evtype) {
1258	case anev_reg_unreg:
1259		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1260			  (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1261			  ? "deregister" : "register");
1262		env[i] = str[i]; i++;
1263		if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1264			scnprintf(str[i], sizeof(str[i]), "VLAN=%d",
1265				  addr_lnid->lnid);
1266			env[i] = str[i]; i++;
1267		}
1268		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1269			scnprintf(str[i], sizeof(str[i]), "MAC=%pM",
1270				  addr_lnid->mac);
1271			env[i] = str[i]; i++;
1272		}
1273		scnprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1274			  token->cssid, token->ssid, token->devnum);
1275		env[i] = str[i]; i++;
1276		scnprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1277		env[i] = str[i]; i++;
1278		scnprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1279			  token->chpid);
1280		env[i] = str[i]; i++;
1281		scnprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x",
1282			  token->chid);
1283		env[i] = str[i]; i++;
1284		break;
1285	case anev_abort:
1286		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1287		env[i] = str[i]; i++;
1288		break;
1289	case anev_reset:
1290		scnprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1291		env[i] = str[i]; i++;
1292		break;
1293	}
1294	env[i] = NULL;
1295	kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1296}
1297
1298struct qeth_bridge_state_data {
1299	struct work_struct worker;
1300	struct qeth_card *card;
1301	u8 role;
1302	u8 state;
1303};
1304
1305static void qeth_bridge_state_change_worker(struct work_struct *work)
1306{
1307	struct qeth_bridge_state_data *data =
1308		container_of(work, struct qeth_bridge_state_data, worker);
1309	char env_locrem[32];
1310	char env_role[32];
1311	char env_state[32];
1312	char *env[] = {
1313		env_locrem,
1314		env_role,
1315		env_state,
1316		NULL
1317	};
1318
1319	scnprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1320	scnprintf(env_role, sizeof(env_role), "ROLE=%s",
1321		  (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1322		  (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1323		  (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1324		  "<INVALID>");
1325	scnprintf(env_state, sizeof(env_state), "STATE=%s",
1326		  (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1327		  (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1328		  (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1329		  "<INVALID>");
1330	kobject_uevent_env(&data->card->gdev->dev.kobj,
1331				KOBJ_CHANGE, env);
1332	kfree(data);
1333}
1334
1335static void qeth_bridge_state_change(struct qeth_card *card,
1336					struct qeth_ipa_cmd *cmd)
1337{
1338	struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1339	struct qeth_bridge_state_data *data;
1340
1341	QETH_CARD_TEXT(card, 2, "brstchng");
1342	if (qports->num_entries == 0) {
1343		QETH_CARD_TEXT(card, 2, "BPempty");
1344		return;
1345	}
1346	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1347		QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1348		return;
1349	}
1350
1351	data = kzalloc(sizeof(*data), GFP_ATOMIC);
1352	if (!data) {
1353		QETH_CARD_TEXT(card, 2, "BPSalloc");
1354		return;
1355	}
1356	INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1357	data->card = card;
1358	/* Information for the local port: */
1359	data->role = qports->entry[0].role;
1360	data->state = qports->entry[0].state;
1361
1362	queue_work(card->event_wq, &data->worker);
1363}
1364
1365struct qeth_addr_change_data {
1366	struct delayed_work dwork;
1367	struct qeth_card *card;
1368	struct qeth_ipacmd_addr_change ac_event;
1369};
1370
1371static void qeth_l2_dev2br_worker(struct work_struct *work)
1372{
1373	struct delayed_work *dwork = to_delayed_work(work);
1374	struct qeth_addr_change_data *data;
1375	struct qeth_card *card;
1376	struct qeth_priv *priv;
1377	unsigned int i;
1378	int rc;
1379
1380	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1381	card = data->card;
1382	priv = netdev_priv(card->dev);
1383
1384	QETH_CARD_TEXT(card, 4, "dev2brew");
1385
1386	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1387		goto free;
1388
1389	if (data->ac_event.lost_event_mask) {
1390		/* Potential re-config in progress, try again later: */
1391		if (!rtnl_trylock()) {
1392			queue_delayed_work(card->event_wq, dwork,
1393					   msecs_to_jiffies(100));
1394			return;
1395		}
1396
1397		if (!netif_device_present(card->dev)) {
1398			rtnl_unlock();
1399			goto free;
1400		}
1401
1402		QETH_DBF_MESSAGE(3,
1403				 "Address change notification overflow on device %x\n",
1404				 CARD_DEVID(card));
1405		/* Card fdb and bridge fdb are out of sync, card has stopped
1406		 * notifications (no need to drain_workqueue). Purge all
1407		 * 'extern_learn' entries from the parent bridge and restart
1408		 * the notifications.
1409		 */
1410		qeth_l2_dev2br_fdb_flush(card);
1411		rc = qeth_l2_dev2br_an_set(card, true);
1412		if (rc) {
1413			/* TODO: if we want to retry after -EAGAIN, be
1414			 * aware there could be stale entries in the
1415			 * workqueue now, that need to be drained.
1416			 * For now we give up:
1417			 */
1418			netdev_err(card->dev,
1419				   "bridge learning_sync failed to recover: %d\n",
1420				   rc);
1421			WRITE_ONCE(card->info.pnso_mode,
1422				   QETH_PNSO_NONE);
1423			/* To remove fdb entries reported by an_set: */
1424			qeth_l2_dev2br_fdb_flush(card);
1425			priv->brport_features ^= BR_LEARNING_SYNC;
1426		} else {
1427			QETH_DBF_MESSAGE(3,
1428					 "Address Notification resynced on device %x\n",
1429					 CARD_DEVID(card));
1430		}
1431
1432		rtnl_unlock();
1433	} else {
1434		for (i = 0; i < data->ac_event.num_entries; i++) {
1435			struct qeth_ipacmd_addr_change_entry *entry =
1436					&data->ac_event.entry[i];
1437			qeth_l2_dev2br_fdb_notify(card,
1438						  entry->change_code,
1439						  &entry->token,
1440						  &entry->addr_lnid);
1441		}
1442	}
1443
1444free:
1445	kfree(data);
1446}
1447
1448static void qeth_addr_change_event_worker(struct work_struct *work)
1449{
1450	struct delayed_work *dwork = to_delayed_work(work);
1451	struct qeth_addr_change_data *data;
1452	struct qeth_card *card;
1453	int i;
1454
1455	data = container_of(dwork, struct qeth_addr_change_data, dwork);
1456	card = data->card;
1457
1458	QETH_CARD_TEXT(data->card, 4, "adrchgew");
1459
1460	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1461		goto free;
1462
1463	if (data->ac_event.lost_event_mask) {
1464		/* Potential re-config in progress, try again later: */
1465		if (!mutex_trylock(&card->sbp_lock)) {
1466			queue_delayed_work(card->event_wq, dwork,
1467					   msecs_to_jiffies(100));
1468			return;
1469		}
1470
1471		dev_info(&data->card->gdev->dev,
1472			 "Address change notification stopped on %s (%s)\n",
1473			 netdev_name(card->dev),
1474			(data->ac_event.lost_event_mask == 0x01)
1475			? "Overflow"
1476			: (data->ac_event.lost_event_mask == 0x02)
1477			? "Bridge port state change"
1478			: "Unknown reason");
1479
1480		data->card->options.sbp.hostnotification = 0;
1481		card->info.pnso_mode = QETH_PNSO_NONE;
1482		mutex_unlock(&data->card->sbp_lock);
1483		qeth_bridge_emit_host_event(data->card, anev_abort,
1484					    0, NULL, NULL);
1485	} else
1486		for (i = 0; i < data->ac_event.num_entries; i++) {
1487			struct qeth_ipacmd_addr_change_entry *entry =
1488					&data->ac_event.entry[i];
1489			qeth_bridge_emit_host_event(data->card,
1490						    anev_reg_unreg,
1491						    entry->change_code,
1492						    &entry->token,
1493						    &entry->addr_lnid);
1494		}
1495
1496free:
1497	kfree(data);
1498}
1499
1500static void qeth_addr_change_event(struct qeth_card *card,
1501				   struct qeth_ipa_cmd *cmd)
1502{
1503	struct qeth_ipacmd_addr_change *hostevs =
1504		 &cmd->data.addrchange;
1505	struct qeth_addr_change_data *data;
1506	int extrasize;
1507
1508	if (card->info.pnso_mode == QETH_PNSO_NONE)
1509		return;
1510
1511	QETH_CARD_TEXT(card, 4, "adrchgev");
1512	if (cmd->hdr.return_code != 0x0000) {
1513		if (cmd->hdr.return_code == 0x0010) {
1514			if (hostevs->lost_event_mask == 0x00)
1515				hostevs->lost_event_mask = 0xff;
1516		} else {
1517			QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1518				cmd->hdr.return_code);
1519			return;
1520		}
1521	}
1522	extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1523						hostevs->num_entries;
1524	data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1525		       GFP_ATOMIC);
1526	if (!data) {
1527		QETH_CARD_TEXT(card, 2, "ACNalloc");
1528		return;
1529	}
1530	if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1531		INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1532	else
1533		INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1534	data->card = card;
1535	data->ac_event = *hostevs;
1536	memcpy(data->ac_event.entry, hostevs->entry, extrasize);
1537	queue_delayed_work(card->event_wq, &data->dwork, 0);
1538}
1539
1540/* SETBRIDGEPORT support; sending commands */
1541
1542struct _qeth_sbp_cbctl {
1543	union {
1544		u32 supported;
1545		struct {
1546			enum qeth_sbp_roles *role;
1547			enum qeth_sbp_states *state;
1548		} qports;
1549	} data;
1550};
1551
1552static int qeth_bridgeport_makerc(struct qeth_card *card,
1553				  struct qeth_ipa_cmd *cmd)
1554{
1555	struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1556	enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1557	u16 ipa_rc = cmd->hdr.return_code;
1558	u16 sbp_rc = sbp->hdr.return_code;
1559	int rc;
1560
1561	if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1562		return 0;
1563
1564	if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1565	    (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1566		switch (sbp_rc) {
1567		case IPA_RC_SUCCESS:
1568			rc = 0;
1569			break;
1570		case IPA_RC_L2_UNSUPPORTED_CMD:
1571		case IPA_RC_UNSUPPORTED_COMMAND:
1572			rc = -EOPNOTSUPP;
1573			break;
1574		case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1575		case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1576			rc = -ENODEV; /* maybe not the best code here? */
1577			dev_err(&card->gdev->dev,
1578	"The device is not configured as a Bridge Port\n");
1579			break;
1580		case IPA_RC_SBP_OSA_OS_MISMATCH:
1581		case IPA_RC_SBP_IQD_OS_MISMATCH:
1582			rc = -EPERM;
1583			dev_err(&card->gdev->dev,
1584	"A Bridge Port is already configured by a different operating system\n");
1585			break;
1586		case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1587		case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1588			switch (setcmd) {
1589			case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1590				rc = -EEXIST;
1591				dev_err(&card->gdev->dev,
1592	"The LAN already has a primary Bridge Port\n");
1593				break;
1594			case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1595				rc = -EBUSY;
1596				dev_err(&card->gdev->dev,
1597	"The device is already a primary Bridge Port\n");
1598				break;
1599			default:
1600				rc = -EIO;
1601			}
1602			break;
1603		case IPA_RC_SBP_OSA_CURRENT_SECOND:
1604		case IPA_RC_SBP_IQD_CURRENT_SECOND:
1605			rc = -EBUSY;
1606			dev_err(&card->gdev->dev,
1607	"The device is already a secondary Bridge Port\n");
1608			break;
1609		case IPA_RC_SBP_OSA_LIMIT_SECOND:
1610		case IPA_RC_SBP_IQD_LIMIT_SECOND:
1611			rc = -EEXIST;
1612			dev_err(&card->gdev->dev,
1613	"The LAN cannot have more secondary Bridge Ports\n");
1614			break;
1615		case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1616		case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1617			rc = -EBUSY;
1618			dev_err(&card->gdev->dev,
1619	"The device is already a primary Bridge Port\n");
1620			break;
1621		case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1622		case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1623			rc = -EACCES;
1624			dev_err(&card->gdev->dev,
1625	"The device is not authorized to be a Bridge Port\n");
1626			break;
1627		default:
1628			rc = -EIO;
1629		}
1630	} else {
1631		switch (ipa_rc) {
1632		case IPA_RC_NOTSUPP:
1633			rc = -EOPNOTSUPP;
1634			break;
1635		case IPA_RC_UNSUPPORTED_COMMAND:
1636			rc = -EOPNOTSUPP;
1637			break;
1638		default:
1639			rc = -EIO;
1640		}
1641	}
1642
1643	if (rc) {
1644		QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1645		QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1646	}
1647	return rc;
1648}
1649
1650static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1651						  enum qeth_ipa_sbp_cmd sbp_cmd,
1652						  unsigned int data_length)
1653{
1654	enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1655						    IPA_CMD_SETBRIDGEPORT_OSA;
1656	struct qeth_ipacmd_sbp_hdr *hdr;
1657	struct qeth_cmd_buffer *iob;
1658
1659	iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1660				 data_length +
1661				 offsetof(struct qeth_ipacmd_setbridgeport,
1662					  data));
1663	if (!iob)
1664		return iob;
1665
1666	hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1667	hdr->cmdlength = sizeof(*hdr) + data_length;
1668	hdr->command_code = sbp_cmd;
1669	hdr->used_total = 1;
1670	hdr->seq_no = 1;
1671	return iob;
1672}
1673
1674static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1675	struct qeth_reply *reply, unsigned long data)
1676{
1677	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1678	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1679	int rc;
1680
1681	QETH_CARD_TEXT(card, 2, "brqsupcb");
1682	rc = qeth_bridgeport_makerc(card, cmd);
1683	if (rc)
1684		return rc;
1685
1686	cbctl->data.supported =
1687		cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1688	return 0;
1689}
1690
1691/**
1692 * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1693 * @card:			     qeth_card structure pointer.
1694 *
1695 * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1696 * strucutre: card->options.sbp.supported_funcs.
1697 */
1698static void qeth_bridgeport_query_support(struct qeth_card *card)
1699{
1700	struct qeth_cmd_buffer *iob;
1701	struct _qeth_sbp_cbctl cbctl;
1702
1703	QETH_CARD_TEXT(card, 2, "brqsuppo");
1704	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1705				 SBP_DATA_SIZEOF(query_cmds_supp));
1706	if (!iob)
1707		return;
1708
1709	if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1710			      &cbctl)) {
1711		card->options.sbp.role = QETH_SBP_ROLE_NONE;
1712		card->options.sbp.supported_funcs = 0;
1713		return;
1714	}
1715	card->options.sbp.supported_funcs = cbctl.data.supported;
1716}
1717
1718static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1719	struct qeth_reply *reply, unsigned long data)
1720{
1721	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1722	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1723	struct qeth_sbp_port_data *qports;
1724	int rc;
1725
1726	QETH_CARD_TEXT(card, 2, "brqprtcb");
1727	rc = qeth_bridgeport_makerc(card, cmd);
1728	if (rc)
1729		return rc;
1730
1731	qports = &cmd->data.sbp.data.port_data;
1732	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1733		QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1734		return -EINVAL;
1735	}
1736	/* first entry contains the state of the local port */
1737	if (qports->num_entries > 0) {
1738		if (cbctl->data.qports.role)
1739			*cbctl->data.qports.role = qports->entry[0].role;
1740		if (cbctl->data.qports.state)
1741			*cbctl->data.qports.state = qports->entry[0].state;
1742	}
1743	return 0;
1744}
1745
1746/**
1747 * qeth_bridgeport_query_ports() - query local bridgeport status.
1748 * @card:			   qeth_card structure pointer.
1749 * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1750 * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1751 *
1752 * Returns negative errno-compatible error indication or 0 on success.
1753 *
1754 * 'role' and 'state' are not updated in case of hardware operation failure.
1755 */
1756int qeth_bridgeport_query_ports(struct qeth_card *card,
1757	enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1758{
1759	struct qeth_cmd_buffer *iob;
1760	struct _qeth_sbp_cbctl cbctl = {
1761		.data = {
1762			.qports = {
1763				.role = role,
1764				.state = state,
1765			},
1766		},
1767	};
1768
1769	QETH_CARD_TEXT(card, 2, "brqports");
1770	if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1771		return -EOPNOTSUPP;
1772	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1773	if (!iob)
1774		return -ENOMEM;
1775
1776	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1777				 &cbctl);
1778}
1779
1780static int qeth_bridgeport_set_cb(struct qeth_card *card,
1781	struct qeth_reply *reply, unsigned long data)
1782{
1783	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1784
1785	QETH_CARD_TEXT(card, 2, "brsetrcb");
1786	return qeth_bridgeport_makerc(card, cmd);
1787}
1788
1789/**
1790 * qeth_bridgeport_setrole() - Assign primary role to the port.
1791 * @card:		       qeth_card structure pointer.
1792 * @role:		       Role to assign.
1793 *
1794 * Returns negative errno-compatible error indication or 0 on success.
1795 */
1796int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1797{
1798	struct qeth_cmd_buffer *iob;
1799	enum qeth_ipa_sbp_cmd setcmd;
1800	unsigned int cmdlength = 0;
1801
1802	QETH_CARD_TEXT(card, 2, "brsetrol");
1803	switch (role) {
1804	case QETH_SBP_ROLE_NONE:
1805		setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1806		break;
1807	case QETH_SBP_ROLE_PRIMARY:
1808		setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1809		cmdlength = SBP_DATA_SIZEOF(set_primary);
1810		break;
1811	case QETH_SBP_ROLE_SECONDARY:
1812		setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1813		break;
1814	default:
1815		return -EINVAL;
1816	}
1817	if (!(card->options.sbp.supported_funcs & setcmd))
1818		return -EOPNOTSUPP;
1819	iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1820	if (!iob)
1821		return -ENOMEM;
1822
1823	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1824}
1825
1826static void qeth_bridgeport_an_set_cb(void *priv,
1827				      struct chsc_pnso_naid_l2 *entry)
1828{
1829	struct qeth_card *card = (struct qeth_card *)priv;
1830	u8 code;
1831
1832	code = IPA_ADDR_CHANGE_CODE_MACADDR;
1833	if (entry->addr_lnid.lnid < VLAN_N_VID)
1834		code |= IPA_ADDR_CHANGE_CODE_VLANID;
1835	qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1836				    (struct net_if_token *)&entry->nit,
1837				    (struct mac_addr_lnid *)&entry->addr_lnid);
1838}
1839
1840/**
1841 * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1842 * @card:		      qeth_card structure pointer.
1843 * @enable:		      0 - disable, non-zero - enable notifications
1844 *
1845 * Returns negative errno-compatible error indication or 0 on success.
1846 *
1847 * On enable, emits a series of address notifications udev events for all
1848 * currently registered hosts.
1849 */
1850int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1851{
1852	int rc;
1853
1854	if (!card->options.sbp.supported_funcs)
1855		return -EOPNOTSUPP;
1856
1857	if (enable) {
1858		qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1859		qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1860		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1861				  qeth_bridgeport_an_set_cb, card);
1862		if (rc)
1863			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1864	} else {
1865		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1866		qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1867	}
1868	return rc;
1869}
1870
1871/* VNIC Characteristics support */
1872
1873/* handle VNICC IPA command return codes; convert to error codes */
1874static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1875{
1876	int rc;
1877
1878	switch (ipa_rc) {
1879	case IPA_RC_SUCCESS:
1880		return ipa_rc;
1881	case IPA_RC_L2_UNSUPPORTED_CMD:
1882	case IPA_RC_NOTSUPP:
1883		rc = -EOPNOTSUPP;
1884		break;
1885	case IPA_RC_VNICC_OOSEQ:
1886		rc = -EALREADY;
1887		break;
1888	case IPA_RC_VNICC_VNICBP:
1889		rc = -EBUSY;
1890		break;
1891	case IPA_RC_L2_ADDR_TABLE_FULL:
1892		rc = -ENOSPC;
1893		break;
1894	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1895		rc = -EACCES;
1896		break;
1897	default:
1898		rc = -EIO;
1899	}
1900
1901	QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1902	return rc;
1903}
1904
1905/* generic VNICC request call back */
1906static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1907				    struct qeth_reply *reply,
1908				    unsigned long data)
1909{
1910	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1911	struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1912	u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1913
1914	QETH_CARD_TEXT(card, 2, "vniccrcb");
1915	if (cmd->hdr.return_code)
1916		return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1917	/* return results to caller */
1918	card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1919	card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1920
1921	if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1922		*(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1923	else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1924		*(u32 *)reply->param = rep->data.getset_timeout.timeout;
1925
1926	return 0;
1927}
1928
1929static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1930						       u32 vnicc_cmd,
1931						       unsigned int data_length)
1932{
1933	struct qeth_ipacmd_vnicc_hdr *hdr;
1934	struct qeth_cmd_buffer *iob;
1935
1936	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1937				 data_length +
1938				 offsetof(struct qeth_ipacmd_vnicc, data));
1939	if (!iob)
1940		return NULL;
1941
1942	hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1943	hdr->data_length = sizeof(*hdr) + data_length;
1944	hdr->sub_command = vnicc_cmd;
1945	return iob;
1946}
1947
1948/* VNICC query VNIC characteristics request */
1949static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1950{
1951	struct qeth_cmd_buffer *iob;
1952
1953	QETH_CARD_TEXT(card, 2, "vniccqch");
1954	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1955	if (!iob)
1956		return -ENOMEM;
1957
1958	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1959}
1960
1961/* VNICC query sub commands request */
1962static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1963				    u32 *sup_cmds)
1964{
1965	struct qeth_cmd_buffer *iob;
1966
1967	QETH_CARD_TEXT(card, 2, "vniccqcm");
1968	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1969				      VNICC_DATA_SIZEOF(query_cmds));
1970	if (!iob)
1971		return -ENOMEM;
1972
1973	__ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1974
1975	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1976}
1977
1978/* VNICC enable/disable characteristic request */
1979static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1980				      u32 cmd)
1981{
1982	struct qeth_cmd_buffer *iob;
1983
1984	QETH_CARD_TEXT(card, 2, "vniccedc");
1985	iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1986	if (!iob)
1987		return -ENOMEM;
1988
1989	__ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1990
1991	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1992}
1993
1994/* VNICC get/set timeout for characteristic request */
1995static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1996					u32 cmd, u32 *timeout)
1997{
1998	struct qeth_vnicc_getset_timeout *getset_timeout;
1999	struct qeth_cmd_buffer *iob;
2000
2001	QETH_CARD_TEXT(card, 2, "vniccgst");
2002	iob = qeth_l2_vnicc_build_cmd(card, cmd,
2003				      VNICC_DATA_SIZEOF(getset_timeout));
2004	if (!iob)
2005		return -ENOMEM;
2006
2007	getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
2008	getset_timeout->vnic_char = vnicc;
2009
2010	if (cmd == IPA_VNICC_SET_TIMEOUT)
2011		getset_timeout->timeout = *timeout;
2012
2013	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
2014}
2015
2016/* recover user timeout setting */
2017static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2018					  u32 *timeout)
2019{
2020	if (card->options.vnicc.sup_chars & vnicc &&
2021	    card->options.vnicc.getset_timeout_sup & vnicc &&
2022	    !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2023					  timeout))
2024		return false;
2025	*timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2026	return true;
2027}
2028
2029/* set current VNICC flag state; called from sysfs store function */
2030int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2031{
2032	int rc = 0;
2033	u32 cmd;
2034
2035	QETH_CARD_TEXT(card, 2, "vniccsch");
2036
2037	/* check if characteristic and enable/disable are supported */
2038	if (!(card->options.vnicc.sup_chars & vnicc) ||
2039	    !(card->options.vnicc.set_char_sup & vnicc))
2040		return -EOPNOTSUPP;
2041
2042	if (qeth_bridgeport_is_in_use(card))
2043		return -EBUSY;
2044
2045	/* set enable/disable command and store wanted characteristic */
2046	if (state) {
2047		cmd = IPA_VNICC_ENABLE;
2048		card->options.vnicc.wanted_chars |= vnicc;
2049	} else {
2050		cmd = IPA_VNICC_DISABLE;
2051		card->options.vnicc.wanted_chars &= ~vnicc;
2052	}
2053
2054	/* do we need to do anything? */
2055	if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2056		return rc;
2057
2058	/* if card is not ready, simply stop here */
2059	if (!qeth_card_hw_is_reachable(card)) {
2060		if (state)
2061			card->options.vnicc.cur_chars |= vnicc;
2062		else
2063			card->options.vnicc.cur_chars &= ~vnicc;
2064		return rc;
2065	}
2066
2067	rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2068	if (rc)
2069		card->options.vnicc.wanted_chars =
2070			card->options.vnicc.cur_chars;
2071	else {
2072		/* successful online VNICC change; handle special cases */
2073		if (state && vnicc == QETH_VNICC_RX_BCAST)
2074			card->options.vnicc.rx_bcast_enabled = true;
2075		if (!state && vnicc == QETH_VNICC_LEARNING)
2076			qeth_l2_vnicc_recover_timeout(card, vnicc,
2077					&card->options.vnicc.learning_timeout);
2078	}
2079
2080	return rc;
2081}
2082
2083/* get current VNICC flag state; called from sysfs show function */
2084int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2085{
2086	int rc = 0;
2087
2088	QETH_CARD_TEXT(card, 2, "vniccgch");
2089
2090	/* check if characteristic is supported */
2091	if (!(card->options.vnicc.sup_chars & vnicc))
2092		return -EOPNOTSUPP;
2093
2094	if (qeth_bridgeport_is_in_use(card))
2095		return -EBUSY;
2096
2097	/* if card is ready, query current VNICC state */
2098	if (qeth_card_hw_is_reachable(card))
2099		rc = qeth_l2_vnicc_query_chars(card);
2100
2101	*state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2102	return rc;
2103}
2104
2105/* set VNICC timeout; called from sysfs store function. Currently, only learning
2106 * supports timeout
2107 */
2108int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2109{
2110	int rc = 0;
2111
2112	QETH_CARD_TEXT(card, 2, "vniccsto");
2113
2114	/* check if characteristic and set_timeout are supported */
2115	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2116	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2117		return -EOPNOTSUPP;
2118
2119	if (qeth_bridgeport_is_in_use(card))
2120		return -EBUSY;
2121
2122	/* do we need to do anything? */
2123	if (card->options.vnicc.learning_timeout == timeout)
2124		return rc;
2125
2126	/* if card is not ready, simply store the value internally and return */
2127	if (!qeth_card_hw_is_reachable(card)) {
2128		card->options.vnicc.learning_timeout = timeout;
2129		return rc;
2130	}
2131
2132	/* send timeout value to card; if successful, store value internally */
2133	rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2134					  IPA_VNICC_SET_TIMEOUT, &timeout);
2135	if (!rc)
2136		card->options.vnicc.learning_timeout = timeout;
2137
2138	return rc;
2139}
2140
2141/* get current VNICC timeout; called from sysfs show function. Currently, only
2142 * learning supports timeout
2143 */
2144int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2145{
2146	int rc = 0;
2147
2148	QETH_CARD_TEXT(card, 2, "vniccgto");
2149
2150	/* check if characteristic and get_timeout are supported */
2151	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2152	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2153		return -EOPNOTSUPP;
2154
2155	if (qeth_bridgeport_is_in_use(card))
2156		return -EBUSY;
2157
2158	/* if card is ready, get timeout. Otherwise, just return stored value */
2159	*timeout = card->options.vnicc.learning_timeout;
2160	if (qeth_card_hw_is_reachable(card))
2161		rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2162						  IPA_VNICC_GET_TIMEOUT,
2163						  timeout);
2164
2165	return rc;
2166}
2167
2168/* check if VNICC is currently enabled */
2169static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2170{
2171	if (!card->options.vnicc.sup_chars)
2172		return false;
2173	/* default values are only OK if rx_bcast was not enabled by user
2174	 * or the card is offline.
2175	 */
2176	if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2177		if (!card->options.vnicc.rx_bcast_enabled ||
2178		    !qeth_card_hw_is_reachable(card))
2179			return false;
2180	}
2181	return true;
2182}
2183
2184/**
2185 *	qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2186 *	@card: qeth_card structure pointer
2187 *
2188 *	qeth_bridgeport functionality is mutually exclusive with usage of the
2189 *	VNIC Characteristics and dev2br address notifications
2190 */
2191bool qeth_bridgeport_allowed(struct qeth_card *card)
2192{
2193	struct qeth_priv *priv = netdev_priv(card->dev);
2194
2195	return (!_qeth_l2_vnicc_is_in_use(card) &&
2196		!(priv->brport_features & BR_LEARNING_SYNC));
2197}
2198
2199/* recover user characteristic setting */
2200static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2201				       bool enable)
2202{
2203	u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2204
2205	if (card->options.vnicc.sup_chars & vnicc &&
2206	    card->options.vnicc.set_char_sup & vnicc &&
2207	    !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2208		return false;
2209	card->options.vnicc.wanted_chars &= ~vnicc;
2210	card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2211	return true;
2212}
2213
2214/* (re-)initialize VNICC */
2215static void qeth_l2_vnicc_init(struct qeth_card *card)
2216{
2217	u32 *timeout = &card->options.vnicc.learning_timeout;
2218	bool enable, error = false;
2219	unsigned int chars_len, i;
2220	unsigned long chars_tmp;
2221	u32 sup_cmds, vnicc;
2222
2223	QETH_CARD_TEXT(card, 2, "vniccini");
2224	/* reset rx_bcast */
2225	card->options.vnicc.rx_bcast_enabled = 0;
2226	/* initial query and storage of VNIC characteristics */
2227	if (qeth_l2_vnicc_query_chars(card)) {
2228		if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2229		    *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2230			dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2231		/* fail quietly if user didn't change the default config */
2232		card->options.vnicc.sup_chars = 0;
2233		card->options.vnicc.cur_chars = 0;
2234		card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2235		return;
2236	}
2237	/* get supported commands for each supported characteristic */
2238	chars_tmp = card->options.vnicc.sup_chars;
2239	chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2240	for_each_set_bit(i, &chars_tmp, chars_len) {
2241		vnicc = BIT(i);
2242		if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2243			sup_cmds = 0;
2244			error = true;
2245		}
2246		if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2247		    (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2248			card->options.vnicc.getset_timeout_sup |= vnicc;
2249		else
2250			card->options.vnicc.getset_timeout_sup &= ~vnicc;
2251		if ((sup_cmds & IPA_VNICC_ENABLE) &&
2252		    (sup_cmds & IPA_VNICC_DISABLE))
2253			card->options.vnicc.set_char_sup |= vnicc;
2254		else
2255			card->options.vnicc.set_char_sup &= ~vnicc;
2256	}
2257	/* enforce assumed default values and recover settings, if changed  */
2258	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2259					       timeout);
2260	/* Change chars, if necessary  */
2261	chars_tmp = card->options.vnicc.wanted_chars ^
2262		    card->options.vnicc.cur_chars;
2263	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2264	for_each_set_bit(i, &chars_tmp, chars_len) {
2265		vnicc = BIT(i);
2266		enable = card->options.vnicc.wanted_chars & vnicc;
2267		error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2268	}
2269	if (error)
2270		dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2271}
2272
2273/* configure default values of VNIC characteristics */
2274static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2275{
2276	/* characteristics values */
2277	card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2278	card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2279	card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2280	/* supported commands */
2281	card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2282	card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2283	/* settings wanted by users */
2284	card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2285}
2286
2287static const struct device_type qeth_l2_devtype = {
2288	.name = "qeth_layer2",
2289	.groups = qeth_l2_attr_groups,
2290};
2291
2292static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2293{
2294	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2295	int rc;
2296
2297	qeth_l2_vnicc_set_defaults(card);
2298	mutex_init(&card->sbp_lock);
2299
2300	if (gdev->dev.type) {
2301		rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
2302		if (rc)
2303			return rc;
2304	} else {
2305		gdev->dev.type = &qeth_l2_devtype;
2306	}
2307
2308	INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2309	return 0;
2310}
2311
2312static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2313{
2314	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2315	struct qeth_priv *priv;
2316
2317	if (gdev->dev.type != &qeth_l2_devtype)
2318		device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
2319
2320	qeth_set_allowed_threads(card, 0, 1);
2321	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2322
2323	if (gdev->state == CCWGROUP_ONLINE)
2324		qeth_set_offline(card, card->discipline, false);
2325
2326	if (card->dev->reg_state == NETREG_REGISTERED) {
2327		priv = netdev_priv(card->dev);
2328		if (priv->brport_features & BR_LEARNING_SYNC) {
2329			rtnl_lock();
2330			qeth_l2_br2dev_put();
2331			rtnl_unlock();
2332		}
2333		unregister_netdev(card->dev);
2334	}
2335}
2336
2337static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2338{
2339	struct net_device *dev = card->dev;
2340	int rc = 0;
2341
2342	qeth_l2_detect_dev2br_support(card);
2343
2344	mutex_lock(&card->sbp_lock);
2345	qeth_bridgeport_query_support(card);
2346	if (card->options.sbp.supported_funcs) {
2347		qeth_l2_setup_bridgeport_attrs(card);
2348		dev_info(&card->gdev->dev,
2349			 "The device represents a Bridge Capable Port\n");
2350	}
2351	mutex_unlock(&card->sbp_lock);
2352
2353	qeth_l2_register_dev_addr(card);
2354
2355	/* for the rx_bcast characteristic, init VNICC after setmac */
2356	qeth_l2_vnicc_init(card);
2357
2358	qeth_l2_trace_features(card);
2359
2360	/* softsetup */
2361	QETH_CARD_TEXT(card, 2, "softsetp");
2362
2363	card->state = CARD_STATE_SOFTSETUP;
2364
2365	qeth_set_allowed_threads(card, 0xffffffff, 0);
2366
2367	if (dev->reg_state != NETREG_REGISTERED) {
2368		rc = qeth_l2_setup_netdev(card);
2369		if (rc)
2370			goto err_setup;
2371
2372		if (carrier_ok)
2373			netif_carrier_on(dev);
2374	} else {
2375		rtnl_lock();
2376		rc = qeth_set_real_num_tx_queues(card,
2377						 qeth_tx_actual_queues(card));
2378		if (rc) {
2379			rtnl_unlock();
2380			goto err_set_queues;
2381		}
2382
2383		if (carrier_ok)
2384			netif_carrier_on(dev);
2385		else
2386			netif_carrier_off(dev);
2387
2388		netif_device_attach(dev);
2389		qeth_enable_hw_features(dev);
2390		qeth_l2_enable_brport_features(card);
2391
2392		if (netif_running(dev)) {
2393			local_bh_disable();
2394			napi_schedule(&card->napi);
2395			/* kick-start the NAPI softirq: */
2396			local_bh_enable();
2397			qeth_l2_set_rx_mode(dev);
2398		}
2399		rtnl_unlock();
2400	}
2401	return 0;
2402
2403err_set_queues:
2404err_setup:
2405	qeth_set_allowed_threads(card, 0, 1);
2406	card->state = CARD_STATE_DOWN;
2407	return rc;
2408}
2409
2410static void qeth_l2_set_offline(struct qeth_card *card)
2411{
2412	struct qeth_priv *priv = netdev_priv(card->dev);
2413
2414	qeth_set_allowed_threads(card, 0, 1);
2415	qeth_l2_drain_rx_mode_cache(card);
2416
2417	if (card->state == CARD_STATE_SOFTSETUP)
2418		card->state = CARD_STATE_DOWN;
2419
2420	qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2421	if (priv->brport_features & BR_LEARNING_SYNC)
2422		qeth_l2_dev2br_fdb_flush(card);
2423}
2424
2425/* Returns zero if the command is successfully "consumed" */
2426static int qeth_l2_control_event(struct qeth_card *card,
2427				 struct qeth_ipa_cmd *cmd)
2428{
2429	switch (cmd->hdr.command) {
2430	case IPA_CMD_SETBRIDGEPORT_OSA:
2431	case IPA_CMD_SETBRIDGEPORT_IQD:
2432		if (cmd->data.sbp.hdr.command_code ==
2433		    IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2434			qeth_bridge_state_change(card, cmd);
2435			return 0;
2436		}
2437
2438		return 1;
2439	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2440		qeth_addr_change_event(card, cmd);
2441		return 0;
2442	default:
2443		return 1;
2444	}
2445}
2446
2447const struct qeth_discipline qeth_l2_discipline = {
2448	.setup = qeth_l2_probe_device,
2449	.remove = qeth_l2_remove_device,
2450	.set_online = qeth_l2_set_online,
2451	.set_offline = qeth_l2_set_offline,
2452	.control_event_handler = qeth_l2_control_event,
2453};
2454EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2455
2456static int __init qeth_l2_init(void)
2457{
2458	pr_info("register layer 2 discipline\n");
2459	refcount_set(&qeth_l2_switchdev_notify_refcnt, 0);
2460	return 0;
2461}
2462
2463static void __exit qeth_l2_exit(void)
2464{
2465	pr_info("unregister layer 2 discipline\n");
2466}
2467
2468module_init(qeth_l2_init);
2469module_exit(qeth_l2_exit);
2470MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2471MODULE_DESCRIPTION("qeth layer 2 discipline");
2472MODULE_LICENSE("GPL");