PageRenderTime 81ms CodeModel.GetById 23ms app.highlight 49ms RepoModel.GetById 0ms app.codeStats 1ms

/drivers/s390/net/qeth_l2_main.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C | 1343 lines | 1172 code | 150 blank | 21 comment | 230 complexity | 67cd8e25001ca20bd7b103b638ae5ec9 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
   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
  27static int qeth_l2_set_offline(struct ccwgroup_device *);
  28static int qeth_l2_stop(struct net_device *);
  29static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30static 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));
  35static void qeth_l2_set_multicast_list(struct net_device *);
  36static int qeth_l2_recover(void *);
  37
  38static 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
  86static 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
 104static 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
 126static 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
 148static 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
 155static 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
 171static 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
 178static 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
 205static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
 206{
 207	struct qeth_mc_mac *mc, *tmp;
 208
 209	spin_lock_bh(&card->mclock);
 210	list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211		if (del) {
 212			if (mc->is_vmac)
 213				qeth_l2_send_setdelmac(card, mc->mc_addr,
 214					IPA_CMD_DELVMAC, NULL);
 215			else
 216				qeth_l2_send_delgroupmac(card, mc->mc_addr);
 217		}
 218		list_del(&mc->list);
 219		kfree(mc);
 220	}
 221	spin_unlock_bh(&card->mclock);
 222}
 223
 224static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 225			struct sk_buff *skb)
 226{
 227	if (card->info.type == QETH_CARD_TYPE_OSN)
 228		return RTN_UNSPEC;
 229	if (is_broadcast_ether_addr(skb->data))
 230		return RTN_BROADCAST;
 231	if (is_multicast_ether_addr(skb->data))
 232		return RTN_MULTICAST;
 233	return RTN_UNSPEC;
 234}
 235
 236static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 237			struct sk_buff *skb, int ipv, int cast_type)
 238{
 239	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 240
 241	memset(hdr, 0, sizeof(struct qeth_hdr));
 242	hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 243
 244	/* set byte byte 3 to casting flags */
 245	if (cast_type == RTN_MULTICAST)
 246		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 247	else if (cast_type == RTN_BROADCAST)
 248		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 249	else
 250		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 251
 252	hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 253	/* VSWITCH relies on the VLAN
 254	 * information to be present in
 255	 * the QDIO header */
 256	if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 257		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 258		hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 259	}
 260}
 261
 262static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 263			struct qeth_reply *reply, unsigned long data)
 264{
 265	struct qeth_ipa_cmd *cmd;
 266
 267	QETH_CARD_TEXT(card, 2, "L2sdvcb");
 268	cmd = (struct qeth_ipa_cmd *) data;
 269	if (cmd->hdr.return_code) {
 270		QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 271			  "Continuing\n", cmd->data.setdelvlan.vlan_id,
 272			  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 273		QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 274		QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 275	}
 276	return 0;
 277}
 278
 279static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 280				enum qeth_ipa_cmds ipacmd)
 281{
 282	struct qeth_ipa_cmd *cmd;
 283	struct qeth_cmd_buffer *iob;
 284
 285	QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 286	iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 287	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 288	cmd->data.setdelvlan.vlan_id = i;
 289	return qeth_send_ipa_cmd(card, iob,
 290				 qeth_l2_send_setdelvlan_cb, NULL);
 291}
 292
 293static void qeth_l2_process_vlans(struct qeth_card *card)
 294{
 295	struct qeth_vlan_vid *id;
 296	QETH_CARD_TEXT(card, 3, "L2prcvln");
 297	spin_lock_bh(&card->vlanlock);
 298	list_for_each_entry(id, &card->vid_list, list) {
 299		qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 300	}
 301	spin_unlock_bh(&card->vlanlock);
 302}
 303
 304static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 305{
 306	struct qeth_card *card = dev->ml_priv;
 307	struct qeth_vlan_vid *id;
 308
 309	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 310	if (!vid)
 311		return;
 312	if (card->info.type == QETH_CARD_TYPE_OSM) {
 313		QETH_CARD_TEXT(card, 3, "aidOSM");
 314		return;
 315	}
 316	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 317		QETH_CARD_TEXT(card, 3, "aidREC");
 318		return;
 319	}
 320	id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 321	if (id) {
 322		id->vid = vid;
 323		qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 324		spin_lock_bh(&card->vlanlock);
 325		list_add_tail(&id->list, &card->vid_list);
 326		spin_unlock_bh(&card->vlanlock);
 327	}
 328}
 329
 330static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 331{
 332	struct qeth_vlan_vid *id, *tmpid = NULL;
 333	struct qeth_card *card = dev->ml_priv;
 334
 335	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 336	if (card->info.type == QETH_CARD_TYPE_OSM) {
 337		QETH_CARD_TEXT(card, 3, "kidOSM");
 338		return;
 339	}
 340	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 341		QETH_CARD_TEXT(card, 3, "kidREC");
 342		return;
 343	}
 344	spin_lock_bh(&card->vlanlock);
 345	list_for_each_entry(id, &card->vid_list, list) {
 346		if (id->vid == vid) {
 347			list_del(&id->list);
 348			tmpid = id;
 349			break;
 350		}
 351	}
 352	spin_unlock_bh(&card->vlanlock);
 353	if (tmpid) {
 354		qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 355		kfree(tmpid);
 356	}
 357	qeth_l2_set_multicast_list(card->dev);
 358}
 359
 360static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 361{
 362	int rc = 0;
 363
 364	QETH_DBF_TEXT(SETUP , 2, "stopcard");
 365	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 366
 367	qeth_set_allowed_threads(card, 0, 1);
 368	if (card->read.state == CH_STATE_UP &&
 369	    card->write.state == CH_STATE_UP &&
 370	    (card->state == CARD_STATE_UP)) {
 371		if (recovery_mode &&
 372		    card->info.type != QETH_CARD_TYPE_OSN) {
 373			qeth_l2_stop(card->dev);
 374		} else {
 375			rtnl_lock();
 376			dev_close(card->dev);
 377			rtnl_unlock();
 378		}
 379		card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 380		card->state = CARD_STATE_SOFTSETUP;
 381	}
 382	if (card->state == CARD_STATE_SOFTSETUP) {
 383		qeth_l2_del_all_mc(card, 0);
 384		qeth_clear_ipacmd_list(card);
 385		card->state = CARD_STATE_HARDSETUP;
 386	}
 387	if (card->state == CARD_STATE_HARDSETUP) {
 388		qeth_qdio_clear_card(card, 0);
 389		qeth_clear_qdio_buffers(card);
 390		qeth_clear_working_pool_list(card);
 391		card->state = CARD_STATE_DOWN;
 392	}
 393	if (card->state == CARD_STATE_DOWN) {
 394		qeth_clear_cmd_buffers(&card->read);
 395		qeth_clear_cmd_buffers(&card->write);
 396	}
 397	return rc;
 398}
 399
 400static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 401				int budget, int *done)
 402{
 403	int work_done = 0;
 404	struct sk_buff *skb;
 405	struct qeth_hdr *hdr;
 406	unsigned int len;
 407
 408	*done = 0;
 409	BUG_ON(!budget);
 410	while (budget) {
 411		skb = qeth_core_get_next_skb(card,
 412			card->qdio.in_q->bufs[card->rx.b_index].buffer,
 413			&card->rx.b_element, &card->rx.e_offset, &hdr);
 414		if (!skb) {
 415			*done = 1;
 416			break;
 417		}
 418		skb->dev = card->dev;
 419		switch (hdr->hdr.l2.id) {
 420		case QETH_HEADER_TYPE_LAYER2:
 421			skb->pkt_type = PACKET_HOST;
 422			skb->protocol = eth_type_trans(skb, skb->dev);
 423			skb->ip_summed = CHECKSUM_NONE;
 424			if (skb->protocol == htons(ETH_P_802_2))
 425				*((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 426			len = skb->len;
 427			netif_receive_skb(skb);
 428			break;
 429		case QETH_HEADER_TYPE_OSN:
 430			if (card->info.type == QETH_CARD_TYPE_OSN) {
 431				skb_push(skb, sizeof(struct qeth_hdr));
 432				skb_copy_to_linear_data(skb, hdr,
 433						sizeof(struct qeth_hdr));
 434				len = skb->len;
 435				card->osn_info.data_cb(skb);
 436				break;
 437			}
 438			/* else unknown */
 439		default:
 440			dev_kfree_skb_any(skb);
 441			QETH_CARD_TEXT(card, 3, "inbunkno");
 442			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 443			continue;
 444		}
 445		work_done++;
 446		budget--;
 447		card->stats.rx_packets++;
 448		card->stats.rx_bytes += len;
 449	}
 450	return work_done;
 451}
 452
 453static int qeth_l2_poll(struct napi_struct *napi, int budget)
 454{
 455	struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 456	int work_done = 0;
 457	struct qeth_qdio_buffer *buffer;
 458	int done;
 459	int new_budget = budget;
 460
 461	if (card->options.performance_stats) {
 462		card->perf_stats.inbound_cnt++;
 463		card->perf_stats.inbound_start_time = qeth_get_micros();
 464	}
 465
 466	while (1) {
 467		if (!card->rx.b_count) {
 468			card->rx.qdio_err = 0;
 469			card->rx.b_count = qdio_get_next_buffers(
 470				card->data.ccwdev, 0, &card->rx.b_index,
 471				&card->rx.qdio_err);
 472			if (card->rx.b_count <= 0) {
 473				card->rx.b_count = 0;
 474				break;
 475			}
 476			card->rx.b_element =
 477				&card->qdio.in_q->bufs[card->rx.b_index]
 478				.buffer->element[0];
 479			card->rx.e_offset = 0;
 480		}
 481
 482		while (card->rx.b_count) {
 483			buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 484			if (!(card->rx.qdio_err &&
 485			    qeth_check_qdio_errors(card, buffer->buffer,
 486			    card->rx.qdio_err, "qinerr")))
 487				work_done += qeth_l2_process_inbound_buffer(
 488					card, new_budget, &done);
 489			else
 490				done = 1;
 491
 492			if (done) {
 493				if (card->options.performance_stats)
 494					card->perf_stats.bufs_rec++;
 495				qeth_put_buffer_pool_entry(card,
 496					buffer->pool_entry);
 497				qeth_queue_input_buffer(card, card->rx.b_index);
 498				card->rx.b_count--;
 499				if (card->rx.b_count) {
 500					card->rx.b_index =
 501						(card->rx.b_index + 1) %
 502						QDIO_MAX_BUFFERS_PER_Q;
 503					card->rx.b_element =
 504						&card->qdio.in_q
 505						->bufs[card->rx.b_index]
 506						.buffer->element[0];
 507					card->rx.e_offset = 0;
 508				}
 509			}
 510
 511			if (work_done >= budget)
 512				goto out;
 513			else
 514				new_budget = budget - work_done;
 515		}
 516	}
 517
 518	napi_complete(napi);
 519	if (qdio_start_irq(card->data.ccwdev, 0))
 520		napi_schedule(&card->napi);
 521out:
 522	if (card->options.performance_stats)
 523		card->perf_stats.inbound_time += qeth_get_micros() -
 524			card->perf_stats.inbound_start_time;
 525	return work_done;
 526}
 527
 528static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 529			   enum qeth_ipa_cmds ipacmd,
 530			   int (*reply_cb) (struct qeth_card *,
 531					    struct qeth_reply*,
 532					    unsigned long))
 533{
 534	struct qeth_ipa_cmd *cmd;
 535	struct qeth_cmd_buffer *iob;
 536
 537	QETH_CARD_TEXT(card, 2, "L2sdmac");
 538	iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 539	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 540	cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 541	memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 542	return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 543}
 544
 545static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 546			   struct qeth_reply *reply,
 547			   unsigned long data)
 548{
 549	struct qeth_ipa_cmd *cmd;
 550
 551	QETH_CARD_TEXT(card, 2, "L2Smaccb");
 552	cmd = (struct qeth_ipa_cmd *) data;
 553	if (cmd->hdr.return_code) {
 554		QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 555		card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 556		switch (cmd->hdr.return_code) {
 557		case IPA_RC_L2_DUP_MAC:
 558		case IPA_RC_L2_DUP_LAYER3_MAC:
 559			dev_warn(&card->gdev->dev,
 560				"MAC address %pM already exists\n",
 561				cmd->data.setdelmac.mac);
 562			break;
 563		case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 564		case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 565			dev_warn(&card->gdev->dev,
 566				"MAC address %pM is not authorized\n",
 567				cmd->data.setdelmac.mac);
 568			break;
 569		default:
 570			break;
 571		}
 572		cmd->hdr.return_code = -EIO;
 573	} else {
 574		card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 575		memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 576		       OSA_ADDR_LEN);
 577		dev_info(&card->gdev->dev,
 578			"MAC address %pM successfully registered on device %s\n",
 579			card->dev->dev_addr, card->dev->name);
 580	}
 581	return 0;
 582}
 583
 584static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 585{
 586	QETH_CARD_TEXT(card, 2, "L2Setmac");
 587	return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 588					  qeth_l2_send_setmac_cb);
 589}
 590
 591static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 592			   struct qeth_reply *reply,
 593			   unsigned long data)
 594{
 595	struct qeth_ipa_cmd *cmd;
 596
 597	QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 598	cmd = (struct qeth_ipa_cmd *) data;
 599	if (cmd->hdr.return_code) {
 600		QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 601		cmd->hdr.return_code = -EIO;
 602		return 0;
 603	}
 604	card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 605
 606	return 0;
 607}
 608
 609static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 610{
 611	QETH_CARD_TEXT(card, 2, "L2Delmac");
 612	if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 613		return 0;
 614	return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 615					  qeth_l2_send_delmac_cb);
 616}
 617
 618static int qeth_l2_request_initial_mac(struct qeth_card *card)
 619{
 620	int rc = 0;
 621	char vendor_pre[] = {0x02, 0x00, 0x00};
 622
 623	QETH_DBF_TEXT(SETUP, 2, "doL2init");
 624	QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 625
 626	rc = qeth_query_setadapterparms(card);
 627	if (rc) {
 628		QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 629			"device %s: x%x\n", CARD_BUS_ID(card), rc);
 630	}
 631
 632	if (card->info.type == QETH_CARD_TYPE_IQD ||
 633	    card->info.type == QETH_CARD_TYPE_OSM ||
 634	    card->info.type == QETH_CARD_TYPE_OSX ||
 635	    card->info.guestlan) {
 636		rc = qeth_setadpparms_change_macaddr(card);
 637		if (rc) {
 638			QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 639				"device %s: x%x\n", CARD_BUS_ID(card), rc);
 640			QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 641			return rc;
 642		}
 643		QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 644	} else {
 645		random_ether_addr(card->dev->dev_addr);
 646		memcpy(card->dev->dev_addr, vendor_pre, 3);
 647	}
 648	return 0;
 649}
 650
 651static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 652{
 653	struct sockaddr *addr = p;
 654	struct qeth_card *card = dev->ml_priv;
 655	int rc = 0;
 656
 657	QETH_CARD_TEXT(card, 3, "setmac");
 658
 659	if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 660		QETH_CARD_TEXT(card, 3, "setmcINV");
 661		return -EOPNOTSUPP;
 662	}
 663
 664	if (card->info.type == QETH_CARD_TYPE_OSN ||
 665	    card->info.type == QETH_CARD_TYPE_OSM ||
 666	    card->info.type == QETH_CARD_TYPE_OSX) {
 667		QETH_CARD_TEXT(card, 3, "setmcTYP");
 668		return -EOPNOTSUPP;
 669	}
 670	QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 671	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 672		QETH_CARD_TEXT(card, 3, "setmcREC");
 673		return -ERESTARTSYS;
 674	}
 675	rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 676	if (!rc)
 677		rc = qeth_l2_send_setmac(card, addr->sa_data);
 678	return rc;
 679}
 680
 681static void qeth_l2_set_multicast_list(struct net_device *dev)
 682{
 683	struct qeth_card *card = dev->ml_priv;
 684	struct netdev_hw_addr *ha;
 685
 686	if (card->info.type == QETH_CARD_TYPE_OSN)
 687		return ;
 688
 689	QETH_CARD_TEXT(card, 3, "setmulti");
 690	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 691	    (card->state != CARD_STATE_UP))
 692		return;
 693	qeth_l2_del_all_mc(card, 1);
 694	spin_lock_bh(&card->mclock);
 695	netdev_for_each_mc_addr(ha, dev)
 696		qeth_l2_add_mc(card, ha->addr, 0);
 697
 698	netdev_for_each_uc_addr(ha, dev)
 699		qeth_l2_add_mc(card, ha->addr, 1);
 700
 701	spin_unlock_bh(&card->mclock);
 702	if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 703		return;
 704	qeth_setadp_promisc_mode(card);
 705}
 706
 707static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 708{
 709	int rc;
 710	struct qeth_hdr *hdr = NULL;
 711	int elements = 0;
 712	struct qeth_card *card = dev->ml_priv;
 713	struct sk_buff *new_skb = skb;
 714	int ipv = qeth_get_ip_version(skb);
 715	int cast_type = qeth_l2_get_cast_type(card, skb);
 716	struct qeth_qdio_out_q *queue = card->qdio.out_qs
 717		[qeth_get_priority_queue(card, skb, ipv, cast_type)];
 718	int tx_bytes = skb->len;
 719	int data_offset = -1;
 720	int elements_needed = 0;
 721	int hd_len = 0;
 722
 723	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 724		card->stats.tx_carrier_errors++;
 725		goto tx_drop;
 726	}
 727
 728	if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 729	    (skb->protocol == htons(ETH_P_IPV6)))
 730		goto tx_drop;
 731
 732	if (card->options.performance_stats) {
 733		card->perf_stats.outbound_cnt++;
 734		card->perf_stats.outbound_start_time = qeth_get_micros();
 735	}
 736	netif_stop_queue(dev);
 737
 738	if (card->info.type == QETH_CARD_TYPE_OSN)
 739		hdr = (struct qeth_hdr *)skb->data;
 740	else {
 741		if (card->info.type == QETH_CARD_TYPE_IQD) {
 742			new_skb = skb;
 743			data_offset = ETH_HLEN;
 744			hd_len = ETH_HLEN;
 745			hdr = kmem_cache_alloc(qeth_core_header_cache,
 746						GFP_ATOMIC);
 747			if (!hdr)
 748				goto tx_drop;
 749			elements_needed++;
 750			skb_reset_mac_header(new_skb);
 751			qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 752			hdr->hdr.l2.pkt_length = new_skb->len;
 753			memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 754				skb_mac_header(new_skb), ETH_HLEN);
 755		} else {
 756			/* create a clone with writeable headroom */
 757			new_skb = skb_realloc_headroom(skb,
 758						sizeof(struct qeth_hdr));
 759			if (!new_skb)
 760				goto tx_drop;
 761			hdr = (struct qeth_hdr *)skb_push(new_skb,
 762						sizeof(struct qeth_hdr));
 763			skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 764			qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 765		}
 766	}
 767
 768	elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 769						elements_needed);
 770	if (!elements) {
 771		if (data_offset >= 0)
 772			kmem_cache_free(qeth_core_header_cache, hdr);
 773		goto tx_drop;
 774	}
 775
 776	if (card->info.type != QETH_CARD_TYPE_IQD) {
 777		if (qeth_hdr_chk_and_bounce(new_skb,
 778		    sizeof(struct qeth_hdr_layer2)))
 779			goto tx_drop;
 780		rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 781					 elements);
 782	} else
 783		rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 784					elements, data_offset, hd_len);
 785	if (!rc) {
 786		card->stats.tx_packets++;
 787		card->stats.tx_bytes += tx_bytes;
 788		if (new_skb != skb)
 789			dev_kfree_skb_any(skb);
 790		rc = NETDEV_TX_OK;
 791	} else {
 792		if (data_offset >= 0)
 793			kmem_cache_free(qeth_core_header_cache, hdr);
 794
 795		if (rc == -EBUSY) {
 796			if (new_skb != skb)
 797				dev_kfree_skb_any(new_skb);
 798			return NETDEV_TX_BUSY;
 799		} else
 800			goto tx_drop;
 801	}
 802
 803	netif_wake_queue(dev);
 804	if (card->options.performance_stats)
 805		card->perf_stats.outbound_time += qeth_get_micros() -
 806			card->perf_stats.outbound_start_time;
 807	return rc;
 808
 809tx_drop:
 810	card->stats.tx_dropped++;
 811	card->stats.tx_errors++;
 812	if ((new_skb != skb) && new_skb)
 813		dev_kfree_skb_any(new_skb);
 814	dev_kfree_skb_any(skb);
 815	netif_wake_queue(dev);
 816	return NETDEV_TX_OK;
 817}
 818
 819static int __qeth_l2_open(struct net_device *dev)
 820{
 821	struct qeth_card *card = dev->ml_priv;
 822	int rc = 0;
 823
 824	QETH_CARD_TEXT(card, 4, "qethopen");
 825	if (card->state == CARD_STATE_UP)
 826		return rc;
 827	if (card->state != CARD_STATE_SOFTSETUP)
 828		return -ENODEV;
 829
 830	if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 831	     (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 832		QETH_CARD_TEXT(card, 4, "nomacadr");
 833		return -EPERM;
 834	}
 835	card->data.state = CH_STATE_UP;
 836	card->state = CARD_STATE_UP;
 837	netif_start_queue(dev);
 838
 839	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 840		napi_enable(&card->napi);
 841		napi_schedule(&card->napi);
 842	} else
 843		rc = -EIO;
 844	return rc;
 845}
 846
 847static int qeth_l2_open(struct net_device *dev)
 848{
 849	struct qeth_card *card = dev->ml_priv;
 850
 851	QETH_CARD_TEXT(card, 5, "qethope_");
 852	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 853		QETH_CARD_TEXT(card, 3, "openREC");
 854		return -ERESTARTSYS;
 855	}
 856	return __qeth_l2_open(dev);
 857}
 858
 859static int qeth_l2_stop(struct net_device *dev)
 860{
 861	struct qeth_card *card = dev->ml_priv;
 862
 863	QETH_CARD_TEXT(card, 4, "qethstop");
 864	netif_tx_disable(dev);
 865	if (card->state == CARD_STATE_UP) {
 866		card->state = CARD_STATE_SOFTSETUP;
 867		napi_disable(&card->napi);
 868	}
 869	return 0;
 870}
 871
 872static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 873{
 874	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 875
 876	INIT_LIST_HEAD(&card->vid_list);
 877	INIT_LIST_HEAD(&card->mc_list);
 878	card->options.layer2 = 1;
 879	card->info.hwtrap = 0;
 880	card->discipline.start_poll = qeth_qdio_start_poll;
 881	card->discipline.input_handler = (qdio_handler_t *)
 882		qeth_qdio_input_handler;
 883	card->discipline.output_handler = (qdio_handler_t *)
 884		qeth_qdio_output_handler;
 885	card->discipline.recover = qeth_l2_recover;
 886	return 0;
 887}
 888
 889static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 890{
 891	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 892
 893	qeth_set_allowed_threads(card, 0, 1);
 894	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 895
 896	if (cgdev->state == CCWGROUP_ONLINE)
 897		qeth_l2_set_offline(cgdev);
 898
 899	if (card->dev) {
 900		unregister_netdev(card->dev);
 901		card->dev = NULL;
 902	}
 903	return;
 904}
 905
 906static const struct ethtool_ops qeth_l2_ethtool_ops = {
 907	.get_link = ethtool_op_get_link,
 908	.get_strings = qeth_core_get_strings,
 909	.get_ethtool_stats = qeth_core_get_ethtool_stats,
 910	.get_sset_count = qeth_core_get_sset_count,
 911	.get_drvinfo = qeth_core_get_drvinfo,
 912	.get_settings = qeth_core_ethtool_get_settings,
 913};
 914
 915static const struct ethtool_ops qeth_l2_osn_ops = {
 916	.get_strings = qeth_core_get_strings,
 917	.get_ethtool_stats = qeth_core_get_ethtool_stats,
 918	.get_sset_count = qeth_core_get_sset_count,
 919	.get_drvinfo = qeth_core_get_drvinfo,
 920};
 921
 922static const struct net_device_ops qeth_l2_netdev_ops = {
 923	.ndo_open		= qeth_l2_open,
 924	.ndo_stop		= qeth_l2_stop,
 925	.ndo_get_stats		= qeth_get_stats,
 926	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
 927	.ndo_validate_addr	= eth_validate_addr,
 928	.ndo_set_multicast_list = qeth_l2_set_multicast_list,
 929	.ndo_do_ioctl	   	= qeth_l2_do_ioctl,
 930	.ndo_set_mac_address    = qeth_l2_set_mac_address,
 931	.ndo_change_mtu	   	= qeth_change_mtu,
 932	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
 933	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 934	.ndo_tx_timeout	   	= qeth_tx_timeout,
 935};
 936
 937static int qeth_l2_setup_netdev(struct qeth_card *card)
 938{
 939	switch (card->info.type) {
 940	case QETH_CARD_TYPE_IQD:
 941		card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 942		break;
 943	case QETH_CARD_TYPE_OSN:
 944		card->dev = alloc_netdev(0, "osn%d", ether_setup);
 945		card->dev->flags |= IFF_NOARP;
 946		break;
 947	default:
 948		card->dev = alloc_etherdev(0);
 949	}
 950
 951	if (!card->dev)
 952		return -ENODEV;
 953
 954	card->dev->ml_priv = card;
 955	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 956	card->dev->mtu = card->info.initial_mtu;
 957	card->dev->netdev_ops = &qeth_l2_netdev_ops;
 958	if (card->info.type != QETH_CARD_TYPE_OSN)
 959		SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 960	else
 961		SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 962	card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 963	card->info.broadcast_capable = 1;
 964	qeth_l2_request_initial_mac(card);
 965	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 966	netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 967	return register_netdev(card->dev);
 968}
 969
 970static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 971{
 972	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 973	int rc = 0;
 974	enum qeth_card_states recover_flag;
 975
 976	BUG_ON(!card);
 977	mutex_lock(&card->discipline_mutex);
 978	mutex_lock(&card->conf_mutex);
 979	QETH_DBF_TEXT(SETUP, 2, "setonlin");
 980	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 981
 982	recover_flag = card->state;
 983	rc = qeth_core_hardsetup_card(card);
 984	if (rc) {
 985		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 986		rc = -ENODEV;
 987		goto out_remove;
 988	}
 989
 990	if (!card->dev && qeth_l2_setup_netdev(card)) {
 991		rc = -ENODEV;
 992		goto out_remove;
 993	}
 994
 995	if (card->info.type != QETH_CARD_TYPE_OSN)
 996		qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 997
 998	if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 999		if (card->info.hwtrap &&
1000		    qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1001			card->info.hwtrap = 0;
1002	} else
1003		card->info.hwtrap = 0;
1004
1005	card->state = CARD_STATE_HARDSETUP;
1006	memset(&card->rx, 0, sizeof(struct qeth_rx));
1007	qeth_print_status_message(card);
1008
1009	/* softsetup */
1010	QETH_DBF_TEXT(SETUP, 2, "softsetp");
1011
1012	rc = qeth_send_startlan(card);
1013	if (rc) {
1014		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1015		if (rc == 0xe080) {
1016			dev_warn(&card->gdev->dev,
1017				"The LAN is offline\n");
1018			card->lan_online = 0;
1019			goto contin;
1020		}
1021		rc = -ENODEV;
1022		goto out_remove;
1023	} else
1024		card->lan_online = 1;
1025
1026contin:
1027	if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1028	    (card->info.type == QETH_CARD_TYPE_OSX))
1029		/* configure isolation level */
1030		qeth_set_access_ctrl_online(card);
1031
1032	if (card->info.type != QETH_CARD_TYPE_OSN &&
1033	    card->info.type != QETH_CARD_TYPE_OSM)
1034		qeth_l2_process_vlans(card);
1035
1036	netif_tx_disable(card->dev);
1037
1038	rc = qeth_init_qdio_queues(card);
1039	if (rc) {
1040		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1041		rc = -ENODEV;
1042		goto out_remove;
1043	}
1044	card->state = CARD_STATE_SOFTSETUP;
1045	if (card->lan_online)
1046		netif_carrier_on(card->dev);
1047	else
1048		netif_carrier_off(card->dev);
1049
1050	qeth_set_allowed_threads(card, 0xffffffff, 0);
1051	if (recover_flag == CARD_STATE_RECOVER) {
1052		if (recovery_mode &&
1053		    card->info.type != QETH_CARD_TYPE_OSN) {
1054			__qeth_l2_open(card->dev);
1055		} else {
1056			rtnl_lock();
1057			dev_open(card->dev);
1058			rtnl_unlock();
1059		}
1060		/* this also sets saved unicast addresses */
1061		qeth_l2_set_multicast_list(card->dev);
1062	}
1063	/* let user_space know that device is online */
1064	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1065	mutex_unlock(&card->conf_mutex);
1066	mutex_unlock(&card->discipline_mutex);
1067	return 0;
1068
1069out_remove:
1070	qeth_l2_stop_card(card, 0);
1071	ccw_device_set_offline(CARD_DDEV(card));
1072	ccw_device_set_offline(CARD_WDEV(card));
1073	ccw_device_set_offline(CARD_RDEV(card));
1074	if (recover_flag == CARD_STATE_RECOVER)
1075		card->state = CARD_STATE_RECOVER;
1076	else
1077		card->state = CARD_STATE_DOWN;
1078	mutex_unlock(&card->conf_mutex);
1079	mutex_unlock(&card->discipline_mutex);
1080	return rc;
1081}
1082
1083static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1084{
1085	return __qeth_l2_set_online(gdev, 0);
1086}
1087
1088static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1089					int recovery_mode)
1090{
1091	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1092	int rc = 0, rc2 = 0, rc3 = 0;
1093	enum qeth_card_states recover_flag;
1094
1095	mutex_lock(&card->discipline_mutex);
1096	mutex_lock(&card->conf_mutex);
1097	QETH_DBF_TEXT(SETUP, 3, "setoffl");
1098	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1099
1100	if (card->dev && netif_carrier_ok(card->dev))
1101		netif_carrier_off(card->dev);
1102	recover_flag = card->state;
1103	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1104		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1105		card->info.hwtrap = 1;
1106	}
1107	qeth_l2_stop_card(card, recovery_mode);
1108	rc  = ccw_device_set_offline(CARD_DDEV(card));
1109	rc2 = ccw_device_set_offline(CARD_WDEV(card));
1110	rc3 = ccw_device_set_offline(CARD_RDEV(card));
1111	if (!rc)
1112		rc = (rc2) ? rc2 : rc3;
1113	if (rc)
1114		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1115	if (recover_flag == CARD_STATE_UP)
1116		card->state = CARD_STATE_RECOVER;
1117	/* let user_space know that device is offline */
1118	kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1119	mutex_unlock(&card->conf_mutex);
1120	mutex_unlock(&card->discipline_mutex);
1121	return 0;
1122}
1123
1124static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1125{
1126	return __qeth_l2_set_offline(cgdev, 0);
1127}
1128
1129static int qeth_l2_recover(void *ptr)
1130{
1131	struct qeth_card *card;
1132	int rc = 0;
1133
1134	card = (struct qeth_card *) ptr;
1135	QETH_CARD_TEXT(card, 2, "recover1");
1136	if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1137		return 0;
1138	QETH_CARD_TEXT(card, 2, "recover2");
1139	dev_warn(&card->gdev->dev,
1140		"A recovery process has been started for the device\n");
1141	__qeth_l2_set_offline(card->gdev, 1);
1142	rc = __qeth_l2_set_online(card->gdev, 1);
1143	if (!rc)
1144		dev_info(&card->gdev->dev,
1145			"Device successfully recovered!\n");
1146	else {
1147		rtnl_lock();
1148		dev_close(card->dev);
1149		rtnl_unlock();
1150		dev_warn(&card->gdev->dev, "The qeth device driver "
1151			"failed to recover an error on the device\n");
1152	}
1153	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1154	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1155	return 0;
1156}
1157
1158static int __init qeth_l2_init(void)
1159{
1160	pr_info("register layer 2 discipline\n");
1161	return 0;
1162}
1163
1164static void __exit qeth_l2_exit(void)
1165{
1166	pr_info("unregister layer 2 discipline\n");
1167}
1168
1169static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1170{
1171	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1172	if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1173		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1174	qeth_qdio_clear_card(card, 0);
1175	qeth_clear_qdio_buffers(card);
1176}
1177
1178static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1179{
1180	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1181
1182	if (card->dev)
1183		netif_device_detach(card->dev);
1184	qeth_set_allowed_threads(card, 0, 1);
1185	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1186	if (gdev->state == CCWGROUP_OFFLINE)
1187		return 0;
1188	if (card->state == CARD_STATE_UP) {
1189		if (card->info.hwtrap)
1190			qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1191		__qeth_l2_set_offline(card->gdev, 1);
1192	} else
1193		__qeth_l2_set_offline(card->gdev, 0);
1194	return 0;
1195}
1196
1197static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1198{
1199	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1200	int rc = 0;
1201
1202	if (gdev->state == CCWGROUP_OFFLINE)
1203		goto out;
1204
1205	if (card->state == CARD_STATE_RECOVER) {
1206		rc = __qeth_l2_set_online(card->gdev, 1);
1207		if (rc) {
1208			rtnl_lock();
1209			dev_close(card->dev);
1210			rtnl_unlock();
1211		}
1212	} else
1213		rc = __qeth_l2_set_online(card->gdev, 0);
1214out:
1215	qeth_set_allowed_threads(card, 0xffffffff, 0);
1216	if (card->dev)
1217		netif_device_attach(card->dev);
1218	if (rc)
1219		dev_warn(&card->gdev->dev, "The qeth device driver "
1220			"failed to recover an error on the device\n");
1221	return rc;
1222}
1223
1224struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1225	.probe = qeth_l2_probe_device,
1226	.remove = qeth_l2_remove_device,
1227	.set_online = qeth_l2_set_online,
1228	.set_offline = qeth_l2_set_offline,
1229	.shutdown = qeth_l2_shutdown,
1230	.freeze = qeth_l2_pm_suspend,
1231	.thaw = qeth_l2_pm_resume,
1232	.restore = qeth_l2_pm_resume,
1233};
1234EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1235
1236static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1237			   struct qeth_cmd_buffer *iob)
1238{
1239	unsigned long flags;
1240	int rc = 0;
1241
1242	QETH_CARD_TEXT(card, 5, "osndctrd");
1243
1244	wait_event(card->wait_q,
1245		   atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1246	qeth_prepare_control_data(card, len, iob);
1247	QETH_CARD_TEXT(card, 6, "osnoirqp");
1248	spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1249	rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1250			      (addr_t) iob, 0, 0);
1251	spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1252	if (rc) {
1253		QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1254			   "ccw_device_start rc = %i\n", rc);
1255		QETH_CARD_TEXT_(card, 2, " err%d", rc);
1256		qeth_release_buffer(iob->channel, iob);
1257		atomic_set(&card->write.irq_pending, 0);
1258		wake_up(&card->wait_q);
1259	}
1260	return rc;
1261}
1262
1263static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1264			struct qeth_cmd_buffer *iob, int data_len)
1265{
1266	u16 s1, s2;
1267
1268	QETH_CARD_TEXT(card, 4, "osndipa");
1269
1270	qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1271	s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1272	s2 = (u16)data_len;
1273	memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1274	memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1275	memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1276	memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1277	return qeth_osn_send_control_data(card, s1, iob);
1278}
1279
1280int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1281{
1282	struct qeth_cmd_buffer *iob;
1283	struct qeth_card *card;
1284	int rc;
1285
1286	if (!dev)
1287		return -ENODEV;
1288	card = dev->ml_priv;
1289	if (!card)
1290		return -ENODEV;
1291	QETH_CARD_TEXT(card, 2, "osnsdmc");
1292	if ((card->state != CARD_STATE_UP) &&
1293	    (card->state != CARD_STATE_SOFTSETUP))
1294		return -ENODEV;
1295	iob = qeth_wait_for_buffer(&card->write);
1296	memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1297	rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1298	return rc;
1299}
1300EXPORT_SYMBOL(qeth_osn_assist);
1301
1302int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1303		  int (*assist_cb)(struct net_device *, void *),
1304		  int (*data_cb)(struct sk_buff *))
1305{
1306	struct qeth_card *card;
1307
1308	*dev = qeth_l2_netdev_by_devno(read_dev_no);
1309	if (*dev == NULL)
1310		return -ENODEV;
1311	card = (*dev)->ml_priv;
1312	if (!card)
1313		return -ENODEV;
1314	QETH_CARD_TEXT(card, 2, "osnreg");
1315	if ((assist_cb == NULL) || (data_cb == NULL))
1316		return -EINVAL;
1317	card->osn_info.assist_cb = assist_cb;
1318	card->osn_info.data_cb = data_cb;
1319	return 0;
1320}
1321EXPORT_SYMBOL(qeth_osn_register);
1322
1323void qeth_osn_deregister(struct net_device *dev)
1324{
1325	struct qeth_card *card;
1326
1327	if (!dev)
1328		return;
1329	card = dev->ml_priv;
1330	if (!card)
1331		return;
1332	QETH_CARD_TEXT(card, 2, "osndereg");
1333	card->osn_info.assist_cb = NULL;
1334	card->osn_info.data_cb = NULL;
1335	return;
1336}
1337EXPORT_SYMBOL(qeth_osn_deregister);
1338
1339module_init(qeth_l2_init);
1340module_exit(qeth_l2_exit);
1341MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1342MODULE_DESCRIPTION("qeth layer 2 discipline");
1343MODULE_LICENSE("GPL");