1/*
   2 *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   3 *
   4 *  eHEA ethernet device driver for IBM eServer System p
   5 *
   6 *  (C) Copyright IBM Corp. 2006
   7 *
   8 *  Authors:
   9 *	 Christoph Raisch <raisch@de.ibm.com>
  10 *	 Jan-Bernd Themann <themann@de.ibm.com>
  11 *	 Thomas Klein <tklein@de.ibm.com>
  12 *
  13 *
  14 * This program is free software; you can redistribute it and/or modify
  15 * it under the terms of the GNU General Public License as published by
  16 * the Free Software Foundation; either version 2, or (at your option)
  17 * any later version.
  18 *
  19 * This program is distributed in the hope that it will be useful,
  20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
  22 * GNU General Public License for more details.
  23 *
  24 * You should have received a copy of the GNU General Public License
  25 * along with this program; if not, write to the Free Software
  26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27 */
  28
  29#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31#include <linux/in.h>
  32#include <linux/ip.h>
  33#include <linux/tcp.h>
  34#include <linux/udp.h>
  35#include <linux/if.h>
  36#include <linux/list.h>
  37#include <linux/slab.h>
  38#include <linux/if_ether.h>
  39#include <linux/notifier.h>
  40#include <linux/reboot.h>
  41#include <linux/memory.h>
  42#include <asm/kexec.h>
  43#include <linux/mutex.h>
  44#include <linux/prefetch.h>
  45
  46#include <net/ip.h>
  47
  48#include "ehea.h"
  49#include "ehea_qmr.h"
  50#include "ehea_phyp.h"
  51
  52
  53MODULE_LICENSE("GPL");
  54MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  55MODULE_DESCRIPTION("IBM eServer HEA Driver");
  56MODULE_VERSION(DRV_VERSION);
  57
  58
  59static int msg_level = -1;
  60static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  61static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  62static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  63static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  64static int use_mcs = 1;
  65static int prop_carrier_state;
  66
  67module_param(msg_level, int, 0);
  68module_param(rq1_entries, int, 0);
  69module_param(rq2_entries, int, 0);
  70module_param(rq3_entries, int, 0);
  71module_param(sq_entries, int, 0);
  72module_param(prop_carrier_state, int, 0);
  73module_param(use_mcs, int, 0);
  74
  75MODULE_PARM_DESC(msg_level, "msg_level");
  76MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  77		 "port to stack. 1:yes, 0:no.  Default = 0 ");
  78MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  79		 "[2^x - 1], x = [7..14]. Default = "
  80		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  81MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  82		 "[2^x - 1], x = [7..14]. Default = "
  83		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  84MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  85		 "[2^x - 1], x = [7..14]. Default = "
  86		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  87MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  88		 "[2^x - 1], x = [7..14]. Default = "
  89		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  90MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  91		 "Default = 1");
  92
  93static int port_name_cnt;
  94static LIST_HEAD(adapter_list);
  95static unsigned long ehea_driver_flags;
  96static DEFINE_MUTEX(dlpar_mem_lock);
  97static struct ehea_fw_handle_array ehea_fw_handles;
  98static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  99
 100
 101static int ehea_probe_adapter(struct platform_device *dev);
 102
 103static int ehea_remove(struct platform_device *dev);
 104
 105static struct of_device_id ehea_module_device_table[] = {
 106	{
 107		.name = "lhea",
 108		.compatible = "IBM,lhea",
 109	},
 110	{
 111		.type = "network",
 112		.compatible = "IBM,lhea-ethernet",
 113	},
 114	{},
 115};
 116MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 117
 118static struct of_device_id ehea_device_table[] = {
 119	{
 120		.name = "lhea",
 121		.compatible = "IBM,lhea",
 122	},
 123	{},
 124};
 125
 126static struct platform_driver ehea_driver = {
 127	.driver = {
 128		.name = "ehea",
 129		.owner = THIS_MODULE,
 130		.of_match_table = ehea_device_table,
 131	},
 132	.probe = ehea_probe_adapter,
 133	.remove = ehea_remove,
 134};
 135
 136void ehea_dump(void *adr, int len, char *msg)
 137{
 138	int x;
 139	unsigned char *deb = adr;
 140	for (x = 0; x < len; x += 16) {
 141		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 142			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 143		deb += 16;
 144	}
 145}
 146
 147static void ehea_schedule_port_reset(struct ehea_port *port)
 148{
 149	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 150		schedule_work(&port->reset_task);
 151}
 152
 153static void ehea_update_firmware_handles(void)
 154{
 155	struct ehea_fw_handle_entry *arr = NULL;
 156	struct ehea_adapter *adapter;
 157	int num_adapters = 0;
 158	int num_ports = 0;
 159	int num_portres = 0;
 160	int i = 0;
 161	int num_fw_handles, k, l;
 162
 163	/* Determine number of handles */
 164	mutex_lock(&ehea_fw_handles.lock);
 165
 166	list_for_each_entry(adapter, &adapter_list, list) {
 167		num_adapters++;
 168
 169		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 170			struct ehea_port *port = adapter->port[k];
 171
 172			if (!port || (port->state != EHEA_PORT_UP))
 173				continue;
 174
 175			num_ports++;
 176			num_portres += port->num_def_qps;
 177		}
 178	}
 179
 180	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 181			 num_ports * EHEA_NUM_PORT_FW_HANDLES +
 182			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 183
 184	if (num_fw_handles) {
 185		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 186		if (!arr)
 187			goto out;  /* Keep the existing array */
 188	} else
 189		goto out_update;
 190
 191	list_for_each_entry(adapter, &adapter_list, list) {
 192		if (num_adapters == 0)
 193			break;
 194
 195		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 196			struct ehea_port *port = adapter->port[k];
 197
 198			if (!port || (port->state != EHEA_PORT_UP) ||
 199			    (num_ports == 0))
 200				continue;
 201
 202			for (l = 0; l < port->num_def_qps; l++) {
 203				struct ehea_port_res *pr = &port->port_res[l];
 204
 205				arr[i].adh = adapter->handle;
 206				arr[i++].fwh = pr->qp->fw_handle;
 207				arr[i].adh = adapter->handle;
 208				arr[i++].fwh = pr->send_cq->fw_handle;
 209				arr[i].adh = adapter->handle;
 210				arr[i++].fwh = pr->recv_cq->fw_handle;
 211				arr[i].adh = adapter->handle;
 212				arr[i++].fwh = pr->eq->fw_handle;
 213				arr[i].adh = adapter->handle;
 214				arr[i++].fwh = pr->send_mr.handle;
 215				arr[i].adh = adapter->handle;
 216				arr[i++].fwh = pr->recv_mr.handle;
 217			}
 218			arr[i].adh = adapter->handle;
 219			arr[i++].fwh = port->qp_eq->fw_handle;
 220			num_ports--;
 221		}
 222
 223		arr[i].adh = adapter->handle;
 224		arr[i++].fwh = adapter->neq->fw_handle;
 225
 226		if (adapter->mr.handle) {
 227			arr[i].adh = adapter->handle;
 228			arr[i++].fwh = adapter->mr.handle;
 229		}
 230		num_adapters--;
 231	}
 232
 233out_update:
 234	kfree(ehea_fw_handles.arr);
 235	ehea_fw_handles.arr = arr;
 236	ehea_fw_handles.num_entries = i;
 237out:
 238	mutex_unlock(&ehea_fw_handles.lock);
 239}
 240
 241static void ehea_update_bcmc_registrations(void)
 242{
 243	unsigned long flags;
 244	struct ehea_bcmc_reg_entry *arr = NULL;
 245	struct ehea_adapter *adapter;
 246	struct ehea_mc_list *mc_entry;
 247	int num_registrations = 0;
 248	int i = 0;
 249	int k;
 250
 251	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 252
 253	/* Determine number of registrations */
 254	list_for_each_entry(adapter, &adapter_list, list)
 255		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 256			struct ehea_port *port = adapter->port[k];
 257
 258			if (!port || (port->state != EHEA_PORT_UP))
 259				continue;
 260
 261			num_registrations += 2;	/* Broadcast registrations */
 262
 263			list_for_each_entry(mc_entry, &port->mc_list->list,list)
 264				num_registrations += 2;
 265		}
 266
 267	if (num_registrations) {
 268		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 269		if (!arr)
 270			goto out;  /* Keep the existing array */
 271	} else
 272		goto out_update;
 273
 274	list_for_each_entry(adapter, &adapter_list, list) {
 275		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 276			struct ehea_port *port = adapter->port[k];
 277
 278			if (!port || (port->state != EHEA_PORT_UP))
 279				continue;
 280
 281			if (num_registrations == 0)
 282				goto out_update;
 283
 284			arr[i].adh = adapter->handle;
 285			arr[i].port_id = port->logical_port_id;
 286			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 287					  EHEA_BCMC_UNTAGGED;
 288			arr[i++].macaddr = port->mac_addr;
 289
 290			arr[i].adh = adapter->handle;
 291			arr[i].port_id = port->logical_port_id;
 292			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 293					  EHEA_BCMC_VLANID_ALL;
 294			arr[i++].macaddr = port->mac_addr;
 295			num_registrations -= 2;
 296
 297			list_for_each_entry(mc_entry,
 298					    &port->mc_list->list, list) {
 299				if (num_registrations == 0)
 300					goto out_update;
 301
 302				arr[i].adh = adapter->handle;
 303				arr[i].port_id = port->logical_port_id;
 304				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 305						  EHEA_BCMC_UNTAGGED;
 306				if (mc_entry->macaddr == 0)
 307					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 308				arr[i++].macaddr = mc_entry->macaddr;
 309
 310				arr[i].adh = adapter->handle;
 311				arr[i].port_id = port->logical_port_id;
 312				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 313						  EHEA_BCMC_VLANID_ALL;
 314				if (mc_entry->macaddr == 0)
 315					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 316				arr[i++].macaddr = mc_entry->macaddr;
 317				num_registrations -= 2;
 318			}
 319		}
 320	}
 321
 322out_update:
 323	kfree(ehea_bcmc_regs.arr);
 324	ehea_bcmc_regs.arr = arr;
 325	ehea_bcmc_regs.num_entries = i;
 326out:
 327	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 328}
 329
 330static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
 331					struct rtnl_link_stats64 *stats)
 332{
 333	struct ehea_port *port = netdev_priv(dev);
 334	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 335	int i;
 336
 337	for (i = 0; i < port->num_def_qps; i++) {
 338		rx_packets += port->port_res[i].rx_packets;
 339		rx_bytes   += port->port_res[i].rx_bytes;
 340	}
 341
 342	for (i = 0; i < port->num_def_qps; i++) {
 343		tx_packets += port->port_res[i].tx_packets;
 344		tx_bytes   += port->port_res[i].tx_bytes;
 345	}
 346
 347	stats->tx_packets = tx_packets;
 348	stats->rx_bytes = rx_bytes;
 349	stats->tx_bytes = tx_bytes;
 350	stats->rx_packets = rx_packets;
 351
 352	stats->multicast = port->stats.multicast;
 353	stats->rx_errors = port->stats.rx_errors;
 354	return stats;
 355}
 356
 357static void ehea_update_stats(struct work_struct *work)
 358{
 359	struct ehea_port *port =
 360		container_of(work, struct ehea_port, stats_work.work);
 361	struct net_device *dev = port->netdev;
 362	struct rtnl_link_stats64 *stats = &port->stats;
 363	struct hcp_ehea_port_cb2 *cb2;
 364	u64 hret;
 365
 366	cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 367	if (!cb2) {
 368		netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 369		goto resched;
 370	}
 371
 372	hret = ehea_h_query_ehea_port(port->adapter->handle,
 373				      port->logical_port_id,
 374				      H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 375	if (hret != H_SUCCESS) {
 376		netdev_err(dev, "query_ehea_port failed\n");
 377		goto out_herr;
 378	}
 379
 380	if (netif_msg_hw(port))
 381		ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 382
 383	stats->multicast = cb2->rxmcp;
 384	stats->rx_errors = cb2->rxuerr;
 385
 386out_herr:
 387	free_page((unsigned long)cb2);
 388resched:
 389	schedule_delayed_work(&port->stats_work,
 390			      round_jiffies_relative(msecs_to_jiffies(1000)));
 391}
 392
 393static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 394{
 395	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 396	struct net_device *dev = pr->port->netdev;
 397	int max_index_mask = pr->rq1_skba.len - 1;
 398	int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 399	int adder = 0;
 400	int i;
 401
 402	pr->rq1_skba.os_skbs = 0;
 403
 404	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 405		if (nr_of_wqes > 0)
 406			pr->rq1_skba.index = index;
 407		pr->rq1_skba.os_skbs = fill_wqes;
 408		return;
 409	}
 410
 411	for (i = 0; i < fill_wqes; i++) {
 412		if (!skb_arr_rq1[index]) {
 413			skb_arr_rq1[index] = netdev_alloc_skb(dev,
 414							      EHEA_L_PKT_SIZE);
 415			if (!skb_arr_rq1[index]) {
 416				pr->rq1_skba.os_skbs = fill_wqes - i;
 417				break;
 418			}
 419		}
 420		index--;
 421		index &= max_index_mask;
 422		adder++;
 423	}
 424
 425	if (adder == 0)
 426		return;
 427
 428	/* Ring doorbell */
 429	ehea_update_rq1a(pr->qp, adder);
 430}
 431
 432static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 433{
 434	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 435	struct net_device *dev = pr->port->netdev;
 436	int i;
 437
 438	if (nr_rq1a > pr->rq1_skba.len) {
 439		netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 440		return;
 441	}
 442
 443	for (i = 0; i < nr_rq1a; i++) {
 444		skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 445		if (!skb_arr_rq1[i])
 446			break;
 447	}
 448	/* Ring doorbell */
 449	ehea_update_rq1a(pr->qp, i - 1);
 450}
 451
 452static int ehea_refill_rq_def(struct ehea_port_res *pr,
 453			      struct ehea_q_skb_arr *q_skba, int rq_nr,
 454			      int num_wqes, int wqe_type, int packet_size)
 455{
 456	struct net_device *dev = pr->port->netdev;
 457	struct ehea_qp *qp = pr->qp;
 458	struct sk_buff **skb_arr = q_skba->arr;
 459	struct ehea_rwqe *rwqe;
 460	int i, index, max_index_mask, fill_wqes;
 461	int adder = 0;
 462	int ret = 0;
 463
 464	fill_wqes = q_skba->os_skbs + num_wqes;
 465	q_skba->os_skbs = 0;
 466
 467	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 468		q_skba->os_skbs = fill_wqes;
 469		return ret;
 470	}
 471
 472	index = q_skba->index;
 473	max_index_mask = q_skba->len - 1;
 474	for (i = 0; i < fill_wqes; i++) {
 475		u64 tmp_addr;
 476		struct sk_buff *skb;
 477
 478		skb = netdev_alloc_skb_ip_align(dev, packet_size);
 479		if (!skb) {
 480			q_skba->os_skbs = fill_wqes - i;
 481			if (q_skba->os_skbs == q_skba->len - 2) {
 482				netdev_info(pr->port->netdev,
 483					    "rq%i ran dry - no mem for skb\n",
 484					    rq_nr);
 485				ret = -ENOMEM;
 486			}
 487			break;
 488		}
 489
 490		skb_arr[index] = skb;
 491		tmp_addr = ehea_map_vaddr(skb->data);
 492		if (tmp_addr == -1) {
 493			dev_consume_skb_any(skb);
 494			q_skba->os_skbs = fill_wqes - i;
 495			ret = 0;
 496			break;
 497		}
 498
 499		rwqe = ehea_get_next_rwqe(qp, rq_nr);
 500		rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 501			    | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 502		rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 503		rwqe->sg_list[0].vaddr = tmp_addr;
 504		rwqe->sg_list[0].len = packet_size;
 505		rwqe->data_segments = 1;
 506
 507		index++;
 508		index &= max_index_mask;
 509		adder++;
 510	}
 511
 512	q_skba->index = index;
 513	if (adder == 0)
 514		goto out;
 515
 516	/* Ring doorbell */
 517	iosync();
 518	if (rq_nr == 2)
 519		ehea_update_rq2a(pr->qp, adder);
 520	else
 521		ehea_update_rq3a(pr->qp, adder);
 522out:
 523	return ret;
 524}
 525
 526
 527static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 528{
 529	return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 530				  nr_of_wqes, EHEA_RWQE2_TYPE,
 531				  EHEA_RQ2_PKT_SIZE);
 532}
 533
 534
 535static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 536{
 537	return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 538				  nr_of_wqes, EHEA_RWQE3_TYPE,
 539				  EHEA_MAX_PACKET_SIZE);
 540}
 541
 542static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 543{
 544	*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 545	if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 546		return 0;
 547	if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 548	    (cqe->header_length == 0))
 549		return 0;
 550	return -EINVAL;
 551}
 552
 553static inline void ehea_fill_skb(struct net_device *dev,
 554				 struct sk_buff *skb, struct ehea_cqe *cqe,
 555				 struct ehea_port_res *pr)
 556{
 557	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */
 558
 559	skb_put(skb, length);
 560	skb->protocol = eth_type_trans(skb, dev);
 561
 562	/* The packet was not an IPV4 packet so a complemented checksum was
 563	   calculated. The value is found in the Internet Checksum field. */
 564	if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 565		skb->ip_summed = CHECKSUM_COMPLETE;
 566		skb->csum = csum_unfold(~cqe->inet_checksum_value);
 567	} else
 568		skb->ip_summed = CHECKSUM_UNNECESSARY;
 569
 570	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 571}
 572
 573static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 574					       int arr_len,
 575					       struct ehea_cqe *cqe)
 576{
 577	int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 578	struct sk_buff *skb;
 579	void *pref;
 580	int x;
 581
 582	x = skb_index + 1;
 583	x &= (arr_len - 1);
 584
 585	pref = skb_array[x];
 586	if (pref) {
 587		prefetchw(pref);
 588		prefetchw(pref + EHEA_CACHE_LINE);
 589
 590		pref = (skb_array[x]->data);
 591		prefetch(pref);
 592		prefetch(pref + EHEA_CACHE_LINE);
 593		prefetch(pref + EHEA_CACHE_LINE * 2);
 594		prefetch(pref + EHEA_CACHE_LINE * 3);
 595	}
 596
 597	skb = skb_array[skb_index];
 598	skb_array[skb_index] = NULL;
 599	return skb;
 600}
 601
 602static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 603						  int arr_len, int wqe_index)
 604{
 605	struct sk_buff *skb;
 606	void *pref;
 607	int x;
 608
 609	x = wqe_index + 1;
 610	x &= (arr_len - 1);
 611
 612	pref = skb_array[x];
 613	if (pref) {
 614		prefetchw(pref);
 615		prefetchw(pref + EHEA_CACHE_LINE);
 616
 617		pref = (skb_array[x]->data);
 618		prefetchw(pref);
 619		prefetchw(pref + EHEA_CACHE_LINE);
 620	}
 621
 622	skb = skb_array[wqe_index];
 623	skb_array[wqe_index] = NULL;
 624	return skb;
 625}
 626
 627static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 628				 struct ehea_cqe *cqe, int *processed_rq2,
 629				 int *processed_rq3)
 630{
 631	struct sk_buff *skb;
 632
 633	if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 634		pr->p_stats.err_tcp_cksum++;
 635	if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 636		pr->p_stats.err_ip_cksum++;
 637	if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 638		pr->p_stats.err_frame_crc++;
 639
 640	if (rq == 2) {
 641		*processed_rq2 += 1;
 642		skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 643		dev_kfree_skb(skb);
 644	} else if (rq == 3) {
 645		*processed_rq3 += 1;
 646		skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 647		dev_kfree_skb(skb);
 648	}
 649
 650	if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 651		if (netif_msg_rx_err(pr->port)) {
 652			pr_err("Critical receive error for QP %d. Resetting port.\n",
 653			       pr->qp->init_attr.qp_nr);
 654			ehea_dump(cqe, sizeof(*cqe), "CQE");
 655		}
 656		ehea_schedule_port_reset(pr->port);
 657		return 1;
 658	}
 659
 660	return 0;
 661}
 662
 663static int ehea_proc_rwqes(struct net_device *dev,
 664			   struct ehea_port_res *pr,
 665			   int budget)
 666{
 667	struct ehea_port *port = pr->port;
 668	struct ehea_qp *qp = pr->qp;
 669	struct ehea_cqe *cqe;
 670	struct sk_buff *skb;
 671	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 672	struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 673	struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 674	int skb_arr_rq1_len = pr->rq1_skba.len;
 675	int skb_arr_rq2_len = pr->rq2_skba.len;
 676	int skb_arr_rq3_len = pr->rq3_skba.len;
 677	int processed, processed_rq1, processed_rq2, processed_rq3;
 678	u64 processed_bytes = 0;
 679	int wqe_index, last_wqe_index, rq, port_reset;
 680
 681	processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 682	last_wqe_index = 0;
 683
 684	cqe = ehea_poll_rq1(qp, &wqe_index);
 685	while ((processed < budget) && cqe) {
 686		ehea_inc_rq1(qp);
 687		processed_rq1++;
 688		processed++;
 689		if (netif_msg_rx_status(port))
 690			ehea_dump(cqe, sizeof(*cqe), "CQE");
 691
 692		last_wqe_index = wqe_index;
 693		rmb();
 694		if (!ehea_check_cqe(cqe, &rq)) {
 695			if (rq == 1) {
 696				/* LL RQ1 */
 697				skb = get_skb_by_index_ll(skb_arr_rq1,
 698							  skb_arr_rq1_len,
 699							  wqe_index);
 700				if (unlikely(!skb)) {
 701					netif_info(port, rx_err, dev,
 702						  "LL rq1: skb=NULL\n");
 703
 704					skb = netdev_alloc_skb(dev,
 705							       EHEA_L_PKT_SIZE);
 706					if (!skb)
 707						break;
 708				}
 709				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 710						 cqe->num_bytes_transfered - 4);
 711				ehea_fill_skb(dev, skb, cqe, pr);
 712			} else if (rq == 2) {
 713				/* RQ2 */
 714				skb = get_skb_by_index(skb_arr_rq2,
 715						       skb_arr_rq2_len, cqe);
 716				if (unlikely(!skb)) {
 717					netif_err(port, rx_err, dev,
 718						  "rq2: skb=NULL\n");
 719					break;
 720				}
 721				ehea_fill_skb(dev, skb, cqe, pr);
 722				processed_rq2++;
 723			} else {
 724				/* RQ3 */
 725				skb = get_skb_by_index(skb_arr_rq3,
 726						       skb_arr_rq3_len, cqe);
 727				if (unlikely(!skb)) {
 728					netif_err(port, rx_err, dev,
 729						  "rq3: skb=NULL\n");
 730					break;
 731				}
 732				ehea_fill_skb(dev, skb, cqe, pr);
 733				processed_rq3++;
 734			}
 735
 736			processed_bytes += skb->len;
 737
 738			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 739				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 740						       cqe->vlan_tag);
 741
 742			napi_gro_receive(&pr->napi, skb);
 743		} else {
 744			pr->p_stats.poll_receive_errors++;
 745			port_reset = ehea_treat_poll_error(pr, rq, cqe,
 746							   &processed_rq2,
 747							   &processed_rq3);
 748			if (port_reset)
 749				break;
 750		}
 751		cqe = ehea_poll_rq1(qp, &wqe_index);
 752	}
 753
 754	pr->rx_packets += processed;
 755	pr->rx_bytes += processed_bytes;
 756
 757	ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 758	ehea_refill_rq2(pr, processed_rq2);
 759	ehea_refill_rq3(pr, processed_rq3);
 760
 761	return processed;
 762}
 763
 764#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 765
 766static void reset_sq_restart_flag(struct ehea_port *port)
 767{
 768	int i;
 769
 770	for (i = 0; i < port->num_def_qps; i++) {
 771		struct ehea_port_res *pr = &port->port_res[i];
 772		pr->sq_restart_flag = 0;
 773	}
 774	wake_up(&port->restart_wq);
 775}
 776
 777static void check_sqs(struct ehea_port *port)
 778{
 779	struct ehea_swqe *swqe;
 780	int swqe_index;
 781	int i, k;
 782
 783	for (i = 0; i < port->num_def_qps; i++) {
 784		struct ehea_port_res *pr = &port->port_res[i];
 785		int ret;
 786		k = 0;
 787		swqe = ehea_get_swqe(pr->qp, &swqe_index);
 788		memset(swqe, 0, SWQE_HEADER_SIZE);
 789		atomic_dec(&pr->swqe_avail);
 790
 791		swqe->tx_control |= EHEA_SWQE_PURGE;
 792		swqe->wr_id = SWQE_RESTART_CHECK;
 793		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 794		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 795		swqe->immediate_data_length = 80;
 796
 797		ehea_post_swqe(pr->qp, swqe);
 798
 799		ret = wait_event_timeout(port->restart_wq,
 800					 pr->sq_restart_flag == 0,
 801					 msecs_to_jiffies(100));
 802
 803		if (!ret) {
 804			pr_err("HW/SW queues out of sync\n");
 805			ehea_schedule_port_reset(pr->port);
 806			return;
 807		}
 808	}
 809}
 810
 811
 812static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 813{
 814	struct sk_buff *skb;
 815	struct ehea_cq *send_cq = pr->send_cq;
 816	struct ehea_cqe *cqe;
 817	int quota = my_quota;
 818	int cqe_counter = 0;
 819	int swqe_av = 0;
 820	int index;
 821	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 822						pr - &pr->port->port_res[0]);
 823
 824	cqe = ehea_poll_cq(send_cq);
 825	while (cqe && (quota > 0)) {
 826		ehea_inc_cq(send_cq);
 827
 828		cqe_counter++;
 829		rmb();
 830
 831		if (cqe->wr_id == SWQE_RESTART_CHECK) {
 832			pr->sq_restart_flag = 1;
 833			swqe_av++;
 834			break;
 835		}
 836
 837		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 838			pr_err("Bad send completion status=0x%04X\n",
 839			       cqe->status);
 840
 841			if (netif_msg_tx_err(pr->port))
 842				ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 843
 844			if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 845				pr_err("Resetting port\n");
 846				ehea_schedule_port_reset(pr->port);
 847				break;
 848			}
 849		}
 850
 851		if (netif_msg_tx_done(pr->port))
 852			ehea_dump(cqe, sizeof(*cqe), "CQE");
 853
 854		if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 855			   == EHEA_SWQE2_TYPE)) {
 856
 857			index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 858			skb = pr->sq_skba.arr[index];
 859			dev_consume_skb_any(skb);
 860			pr->sq_skba.arr[index] = NULL;
 861		}
 862
 863		swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 864		quota--;
 865
 866		cqe = ehea_poll_cq(send_cq);
 867	}
 868
 869	ehea_update_feca(send_cq, cqe_counter);
 870	atomic_add(swqe_av, &pr->swqe_avail);
 871
 872	if (unlikely(netif_tx_queue_stopped(txq) &&
 873		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 874		__netif_tx_lock(txq, smp_processor_id());
 875		if (netif_tx_queue_stopped(txq) &&
 876		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 877			netif_tx_wake_queue(txq);
 878		__netif_tx_unlock(txq);
 879	}
 880
 881	wake_up(&pr->port->swqe_avail_wq);
 882
 883	return cqe;
 884}
 885
 886#define EHEA_POLL_MAX_CQES 65535
 887
 888static int ehea_poll(struct napi_struct *napi, int budget)
 889{
 890	struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 891						napi);
 892	struct net_device *dev = pr->port->netdev;
 893	struct ehea_cqe *cqe;
 894	struct ehea_cqe *cqe_skb = NULL;
 895	int wqe_index;
 896	int rx = 0;
 897
 898	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 899	rx += ehea_proc_rwqes(dev, pr, budget - rx);
 900
 901	while (rx != budget) {
 902		napi_complete(napi);
 903		ehea_reset_cq_ep(pr->recv_cq);
 904		ehea_reset_cq_ep(pr->send_cq);
 905		ehea_reset_cq_n1(pr->recv_cq);
 906		ehea_reset_cq_n1(pr->send_cq);
 907		rmb();
 908		cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 909		cqe_skb = ehea_poll_cq(pr->send_cq);
 910
 911		if (!cqe && !cqe_skb)
 912			return rx;
 913
 914		if (!napi_reschedule(napi))
 915			return rx;
 916
 917		cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 918		rx += ehea_proc_rwqes(dev, pr, budget - rx);
 919	}
 920
 921	return rx;
 922}
 923
 924#ifdef CONFIG_NET_POLL_CONTROLLER
 925static void ehea_netpoll(struct net_device *dev)
 926{
 927	struct ehea_port *port = netdev_priv(dev);
 928	int i;
 929
 930	for (i = 0; i < port->num_def_qps; i++)
 931		napi_schedule(&port->port_res[i].napi);
 932}
 933#endif
 934
 935static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 936{
 937	struct ehea_port_res *pr = param;
 938
 939	napi_schedule(&pr->napi);
 940
 941	return IRQ_HANDLED;
 942}
 943
 944static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 945{
 946	struct ehea_port *port = param;
 947	struct ehea_eqe *eqe;
 948	struct ehea_qp *qp;
 949	u32 qp_token;
 950	u64 resource_type, aer, aerr;
 951	int reset_port = 0;
 952
 953	eqe = ehea_poll_eq(port->qp_eq);
 954
 955	while (eqe) {
 956		qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 957		pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 958		       eqe->entry, qp_token);
 959
 960		qp = port->port_res[qp_token].qp;
 961
 962		resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 963						&aer, &aerr);
 964
 965		if (resource_type == EHEA_AER_RESTYPE_QP) {
 966			if ((aer & EHEA_AER_RESET_MASK) ||
 967			    (aerr & EHEA_AERR_RESET_MASK))
 968				 reset_port = 1;
 969		} else
 970			reset_port = 1;   /* Reset in case of CQ or EQ error */
 971
 972		eqe = ehea_poll_eq(port->qp_eq);
 973	}
 974
 975	if (reset_port) {
 976		pr_err("Resetting port\n");
 977		ehea_schedule_port_reset(port);
 978	}
 979
 980	return IRQ_HANDLED;
 981}
 982
 983static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 984				       int logical_port)
 985{
 986	int i;
 987
 988	for (i = 0; i < EHEA_MAX_PORTS; i++)
 989		if (adapter->port[i])
 990			if (adapter->port[i]->logical_port_id == logical_port)
 991				return adapter->port[i];
 992	return NULL;
 993}
 994
 995int ehea_sense_port_attr(struct ehea_port *port)
 996{
 997	int ret;
 998	u64 hret;
 999	struct hcp_ehea_port_cb0 *cb0;
1000
1001	/* may be called via ehea_neq_tasklet() */
1002	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
1003	if (!cb0) {
1004		pr_err("no mem for cb0\n");
1005		ret = -ENOMEM;
1006		goto out;
1007	}
1008
1009	hret = ehea_h_query_ehea_port(port->adapter->handle,
1010				      port->logical_port_id, H_PORT_CB0,
1011				      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
1012				      cb0);
1013	if (hret != H_SUCCESS) {
1014		ret = -EIO;
1015		goto out_free;
1016	}
1017
1018	/* MAC address */
1019	port->mac_addr = cb0->port_mac_addr << 16;
1020
1021	if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1022		ret = -EADDRNOTAVAIL;
1023		goto out_free;
1024	}
1025
1026	/* Port speed */
1027	switch (cb0->port_speed) {
1028	case H_SPEED_10M_H:
1029		port->port_speed = EHEA_SPEED_10M;
1030		port->full_duplex = 0;
1031		break;
1032	case H_SPEED_10M_F:
1033		port->port_speed = EHEA_SPEED_10M;
1034		port->full_duplex = 1;
1035		break;
1036	case H_SPEED_100M_H:
1037		port->port_speed = EHEA_SPEED_100M;
1038		port->full_duplex = 0;
1039		break;
1040	case H_SPEED_100M_F:
1041		port->port_speed = EHEA_SPEED_100M;
1042		port->full_duplex = 1;
1043		break;
1044	case H_SPEED_1G_F:
1045		port->port_speed = EHEA_SPEED_1G;
1046		port->full_duplex = 1;
1047		break;
1048	case H_SPEED_10G_F:
1049		port->port_speed = EHEA_SPEED_10G;
1050		port->full_duplex = 1;
1051		break;
1052	default:
1053		port->port_speed = 0;
1054		port->full_duplex = 0;
1055		break;
1056	}
1057
1058	port->autoneg = 1;
1059	port->num_mcs = cb0->num_default_qps;
1060
1061	/* Number of default QPs */
1062	if (use_mcs)
1063		port->num_def_qps = cb0->num_default_qps;
1064	else
1065		port->num_def_qps = 1;
1066
1067	if (!port->num_def_qps) {
1068		ret = -EINVAL;
1069		goto out_free;
1070	}
1071
1072	ret = 0;
1073out_free:
1074	if (ret || netif_msg_probe(port))
1075		ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1076	free_page((unsigned long)cb0);
1077out:
1078	return ret;
1079}
1080
1081int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1082{
1083	struct hcp_ehea_port_cb4 *cb4;
1084	u64 hret;
1085	int ret = 0;
1086
1087	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1088	if (!cb4) {
1089		pr_err("no mem for cb4\n");
1090		ret = -ENOMEM;
1091		goto out;
1092	}
1093
1094	cb4->port_speed = port_speed;
1095
1096	netif_carrier_off(port->netdev);
1097
1098	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1099				       port->logical_port_id,
1100				       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1101	if (hret == H_SUCCESS) {
1102		port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1103
1104		hret = ehea_h_query_ehea_port(port->adapter->handle,
1105					      port->logical_port_id,
1106					      H_PORT_CB4, H_PORT_CB4_SPEED,
1107					      cb4);
1108		if (hret == H_SUCCESS) {
1109			switch (cb4->port_speed) {
1110			case H_SPEED_10M_H:
1111				port->port_speed = EHEA_SPEED_10M;
1112				port->full_duplex = 0;
1113				break;
1114			case H_SPEED_10M_F:
1115				port->port_speed = EHEA_SPEED_10M;
1116				port->full_duplex = 1;
1117				break;
1118			case H_SPEED_100M_H:
1119				port->port_speed = EHEA_SPEED_100M;
1120				port->full_duplex = 0;
1121				break;
1122			case H_SPEED_100M_F:
1123				port->port_speed = EHEA_SPEED_100M;
1124				port->full_duplex = 1;
1125				break;
1126			case H_SPEED_1G_F:
1127				port->port_speed = EHEA_SPEED_1G;
1128				port->full_duplex = 1;
1129				break;
1130			case H_SPEED_10G_F:
1131				port->port_speed = EHEA_SPEED_10G;
1132				port->full_duplex = 1;
1133				break;
1134			default:
1135				port->port_speed = 0;
1136				port->full_duplex = 0;
1137				break;
1138			}
1139		} else {
1140			pr_err("Failed sensing port speed\n");
1141			ret = -EIO;
1142		}
1143	} else {
1144		if (hret == H_AUTHORITY) {
1145			pr_info("Hypervisor denied setting port speed\n");
1146			ret = -EPERM;
1147		} else {
1148			ret = -EIO;
1149			pr_err("Failed setting port speed\n");
1150		}
1151	}
1152	if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1153		netif_carrier_on(port->netdev);
1154
1155	free_page((unsigned long)cb4);
1156out:
1157	return ret;
1158}
1159
1160static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1161{
1162	int ret;
1163	u8 ec;
1164	u8 portnum;
1165	struct ehea_port *port;
1166	struct net_device *dev;
1167
1168	ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1169	portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1170	port = ehea_get_port(adapter, portnum);
1171	dev = port->netdev;
1172
1173	switch (ec) {
1174	case EHEA_EC_PORTSTATE_CHG:	/* port state change */
1175
1176		if (!port) {
1177			netdev_err(dev, "unknown portnum %x\n", portnum);
1178			break;
1179		}
1180
1181		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1182			if (!netif_carrier_ok(dev)) {
1183				ret = ehea_sense_port_attr(port);
1184				if (ret) {
1185					netdev_err(dev, "failed resensing port attributes\n");
1186					break;
1187				}
1188
1189				netif_info(port, link, dev,
1190					   "Logical port up: %dMbps %s Duplex\n",
1191					   port->port_speed,
1192					   port->full_duplex == 1 ?
1193					   "Full" : "Half");
1194
1195				netif_carrier_on(dev);
1196				netif_wake_queue(dev);
1197			}
1198		} else
1199			if (netif_carrier_ok(dev)) {
1200				netif_info(port, link, dev,
1201					   "Logical port down\n");
1202				netif_carrier_off(dev);
1203				netif_tx_disable(dev);
1204			}
1205
1206		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1207			port->phy_link = EHEA_PHY_LINK_UP;
1208			netif_info(port, link, dev,
1209				   "Physical port up\n");
1210			if (prop_carrier_state)
1211				netif_carrier_on(dev);
1212		} else {
1213			port->phy_link = EHEA_PHY_LINK_DOWN;
1214			netif_info(port, link, dev,
1215				   "Physical port down\n");
1216			if (prop_carrier_state)
1217				netif_carrier_off(dev);
1218		}
1219
1220		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1221			netdev_info(dev,
1222				    "External switch port is primary port\n");
1223		else
1224			netdev_info(dev,
1225				    "External switch port is backup port\n");
1226
1227		break;
1228	case EHEA_EC_ADAPTER_MALFUNC:
1229		netdev_err(dev, "Adapter malfunction\n");
1230		break;
1231	case EHEA_EC_PORT_MALFUNC:
1232		netdev_info(dev, "Port malfunction\n");
1233		netif_carrier_off(dev);
1234		netif_tx_disable(dev);
1235		break;
1236	default:
1237		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1238		break;
1239	}
1240}
1241
1242static void ehea_neq_tasklet(unsigned long data)
1243{
1244	struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1245	struct ehea_eqe *eqe;
1246	u64 event_mask;
1247
1248	eqe = ehea_poll_eq(adapter->neq);
1249	pr_debug("eqe=%p\n", eqe);
1250
1251	while (eqe) {
1252		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1253		ehea_parse_eqe(adapter, eqe->entry);
1254		eqe = ehea_poll_eq(adapter->neq);
1255		pr_debug("next eqe=%p\n", eqe);
1256	}
1257
1258	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1259		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1260		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1261
1262	ehea_h_reset_events(adapter->handle,
1263			    adapter->neq->fw_handle, event_mask);
1264}
1265
1266static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1267{
1268	struct ehea_adapter *adapter = param;
1269	tasklet_hi_schedule(&adapter->neq_tasklet);
1270	return IRQ_HANDLED;
1271}
1272
1273
1274static int ehea_fill_port_res(struct ehea_port_res *pr)
1275{
1276	int ret;
1277	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1278
1279	ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1280
1281	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1282
1283	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1284
1285	return ret;
1286}
1287
1288static int ehea_reg_interrupts(struct net_device *dev)
1289{
1290	struct ehea_port *port = netdev_priv(dev);
1291	struct ehea_port_res *pr;
1292	int i, ret;
1293
1294
1295	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1296		 dev->name);
1297
1298	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1299				  ehea_qp_aff_irq_handler,
1300				  0, port->int_aff_name, port);
1301	if (ret) {
1302		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1303			   port->qp_eq->attr.ist1);
1304		goto out_free_qpeq;
1305	}
1306
1307	netif_info(port, ifup, dev,
1308		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1309		   port->qp_eq->attr.ist1);
1310
1311
1312	for (i = 0; i < port->num_def_qps; i++) {
1313		pr = &port->port_res[i];
1314		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1315			 "%s-queue%d", dev->name, i);
1316		ret = ibmebus_request_irq(pr->eq->attr.ist1,
1317					  ehea_recv_irq_handler,
1318					  0, pr->int_send_name, pr);
1319		if (ret) {
1320			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1321				   i, pr->eq->attr.ist1);
1322			goto out_free_req;
1323		}
1324		netif_info(port, ifup, dev,
1325			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1326			   pr->eq->attr.ist1, i);
1327	}
1328out:
1329	return ret;
1330
1331
1332out_free_req:
1333	while (--i >= 0) {
1334		u32 ist = port->port_res[i].eq->attr.ist1;
1335		ibmebus_free_irq(ist, &port->port_res[i]);
1336	}
1337
1338out_free_qpeq:
1339	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1340	i = port->num_def_qps;
1341
1342	goto out;
1343
1344}
1345
1346static void ehea_free_interrupts(struct net_device *dev)
1347{
1348	struct ehea_port *port = netdev_priv(dev);
1349	struct ehea_port_res *pr;
1350	int i;
1351
1352	/* send */
1353
1354	for (i = 0; i < port->num_def_qps; i++) {
1355		pr = &port->port_res[i];
1356		ibmebus_free_irq(pr->eq->attr.ist1, pr);
1357		netif_info(port, intr, dev,
1358			   "free send irq for res %d with handle 0x%X\n",
1359			   i, pr->eq->attr.ist1);
1360	}
1361
1362	/* associated events */
1363	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1364	netif_info(port, intr, dev,
1365		   "associated event interrupt for handle 0x%X freed\n",
1366		   port->qp_eq->attr.ist1);
1367}
1368
1369static int ehea_configure_port(struct ehea_port *port)
1370{
1371	int ret, i;
1372	u64 hret, mask;
1373	struct hcp_ehea_port_cb0 *cb0;
1374
1375	ret = -ENOMEM;
1376	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1377	if (!cb0)
1378		goto out;
1379
1380	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1381		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1382		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1383		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1384		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1385				      PXLY_RC_VLAN_FILTER)
1386		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1387
1388	for (i = 0; i < port->num_mcs; i++)
1389		if (use_mcs)
1390			cb0->default_qpn_arr[i] =
1391				port->port_res[i].qp->init_attr.qp_nr;
1392		else
1393			cb0->default_qpn_arr[i] =
1394				port->port_res[0].qp->init_attr.qp_nr;
1395
1396	if (netif_msg_ifup(port))
1397		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1398
1399	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1400	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1401
1402	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1403				       port->logical_port_id,
1404				       H_PORT_CB0, mask, cb0);
1405	ret = -EIO;
1406	if (hret != H_SUCCESS)
1407		goto out_free;
1408
1409	ret = 0;
1410
1411out_free:
1412	free_page((unsigned long)cb0);
1413out:
1414	return ret;
1415}
1416
1417static int ehea_gen_smrs(struct ehea_port_res *pr)
1418{
1419	int ret;
1420	struct ehea_adapter *adapter = pr->port->adapter;
1421
1422	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1423	if (ret)
1424		goto out;
1425
1426	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1427	if (ret)
1428		goto out_free;
1429
1430	return 0;
1431
1432out_free:
1433	ehea_rem_mr(&pr->send_mr);
1434out:
1435	pr_err("Generating SMRS failed\n");
1436	return -EIO;
1437}
1438
1439static int ehea_rem_smrs(struct ehea_port_res *pr)
1440{
1441	if ((ehea_rem_mr(&pr->send_mr)) ||
1442	    (ehea_rem_mr(&pr->recv_mr)))
1443		return -EIO;
1444	else
1445		return 0;
1446}
1447
1448static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1449{
1450	int arr_size = sizeof(void *) * max_q_entries;
1451
1452	q_skba->arr = vzalloc(arr_size);
1453	if (!q_skba->arr)
1454		return -ENOMEM;
1455
1456	q_skba->len = max_q_entries;
1457	q_skba->index = 0;
1458	q_skba->os_skbs = 0;
1459
1460	return 0;
1461}
1462
1463static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1464			      struct port_res_cfg *pr_cfg, int queue_token)
1465{
1466	struct ehea_adapter *adapter = port->adapter;
1467	enum ehea_eq_type eq_type = EHEA_EQ;
1468	struct ehea_qp_init_attr *init_attr = NULL;
1469	int ret = -EIO;
1470	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1471
1472	tx_bytes = pr->tx_bytes;
1473	tx_packets = pr->tx_packets;
1474	rx_bytes = pr->rx_bytes;
1475	rx_packets = pr->rx_packets;
1476
1477	memset(pr, 0, sizeof(struct ehea_port_res));
1478
1479	pr->tx_bytes = rx_bytes;
1480	pr->tx_packets = tx_packets;
1481	pr->rx_bytes = rx_bytes;
1482	pr->rx_packets = rx_packets;
1483
1484	pr->port = port;
1485
1486	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1487	if (!pr->eq) {
1488		pr_err("create_eq failed (eq)\n");
1489		goto out_free;
1490	}
1491
1492	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1493				     pr->eq->fw_handle,
1494				     port->logical_port_id);
1495	if (!pr->recv_cq) {
1496		pr_err("create_cq failed (cq_recv)\n");
1497		goto out_free;
1498	}
1499
1500	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1501				     pr->eq->fw_handle,
1502				     port->logical_port_id);
1503	if (!pr->send_cq) {
1504		pr_err("create_cq failed (cq_send)\n");
1505		goto out_free;
1506	}
1507
1508	if (netif_msg_ifup(port))
1509		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1510			pr->send_cq->attr.act_nr_of_cqes,
1511			pr->recv_cq->attr.act_nr_of_cqes);
1512
1513	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1514	if (!init_attr) {
1515		ret = -ENOMEM;
1516		pr_err("no mem for ehea_qp_init_attr\n");
1517		goto out_free;
1518	}
1519
1520	init_attr->low_lat_rq1 = 1;
1521	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */
1522	init_attr->rq_count = 3;
1523	init_attr->qp_token = queue_token;
1524	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1525	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1526	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1527	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1528	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1529	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1530	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1531	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1532	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1533	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1534	init_attr->port_nr = port->logical_port_id;
1535	init_attr->send_cq_handle = pr->send_cq->fw_handle;
1536	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1537	init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1538
1539	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1540	if (!pr->qp) {
1541		pr_err("create_qp failed\n");
1542		ret = -EIO;
1543		goto out_free;
1544	}
1545
1546	if (netif_msg_ifup(port))
1547		pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n",
1548			init_attr->qp_nr,
1549			init_attr->act_nr_send_wqes,
1550			init_attr->act_nr_rwqes_rq1,
1551			init_attr->act_nr_rwqes_rq2,
1552			init_attr->act_nr_rwqes_rq3);
1553
1554	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1555
1556	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1557	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1558	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1559	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1560	if (ret)
1561		goto out_free;
1562
1563	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1564	if (ehea_gen_smrs(pr) != 0) {
1565		ret = -EIO;
1566		goto out_free;
1567	}
1568
1569	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1570
1571	kfree(init_attr);
1572
1573	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1574
1575	ret = 0;
1576	goto out;
1577
1578out_free:
1579	kfree(init_attr);
1580	vfree(pr->sq_skba.arr);
1581	vfree(pr->rq1_skba.arr);
1582	vfree(pr->rq2_skba.arr);
1583	vfree(pr->rq3_skba.arr);
1584	ehea_destroy_qp(pr->qp);
1585	ehea_destroy_cq(pr->send_cq);
1586	ehea_destroy_cq(pr->recv_cq);
1587	ehea_destroy_eq(pr->eq);
1588out:
1589	return ret;
1590}
1591
1592static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1593{
1594	int ret, i;
1595
1596	if (pr->qp)
1597		netif_napi_del(&pr->napi);
1598
1599	ret = ehea_destroy_qp(pr->qp);
1600
1601	if (!ret) {
1602		ehea_destroy_cq(pr->send_cq);
1603		ehea_destroy_cq(pr->recv_cq);
1604		ehea_destroy_eq(pr->eq);
1605
1606		for (i = 0; i < pr->rq1_skba.len; i++)
1607			if (pr->rq1_skba.arr[i])
1608				dev_kfree_skb(pr->rq1_skba.arr[i]);
1609
1610		for (i = 0; i < pr->rq2_skba.len; i++)
1611			if (pr->rq2_skba.arr[i])
1612				dev_kfree_skb(pr->rq2_skba.arr[i]);
1613
1614		for (i = 0; i < pr->rq3_skba.len; i++)
1615			if (pr->rq3_skba.arr[i])
1616				dev_kfree_skb(pr->rq3_skba.arr[i]);
1617
1618		for (i = 0; i < pr->sq_skba.len; i++)
1619			if (pr->sq_skba.arr[i])
1620				dev_kfree_skb(pr->sq_skba.arr[i]);
1621
1622		vfree(pr->rq1_skba.arr);
1623		vfree(pr->rq2_skba.arr);
1624		vfree(pr->rq3_skba.arr);
1625		vfree(pr->sq_skba.arr);
1626		ret = ehea_rem_smrs(pr);
1627	}
1628	return ret;
1629}
1630
1631static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1632				  u32 lkey)
1633{
1634	int skb_data_size = skb_headlen(skb);
1635	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1636	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1637	unsigned int immediate_len = SWQE2_MAX_IMM;
1638
1639	swqe->descriptors = 0;
1640
1641	if (skb_is_gso(skb)) {
1642		swqe->tx_control |= EHEA_SWQE_TSO;
1643		swqe->mss = skb_shinfo(skb)->gso_size;
1644		/*
1645		 * For TSO packets we only copy the headers into the
1646		 * immediate area.
1647		 */
1648		immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1649	}
1650
1651	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1652		skb_copy_from_linear_data(skb, imm_data, immediate_len);
1653		swqe->immediate_data_length = immediate_len;
1654
1655		if (skb_data_size > immediate_len) {
1656			sg1entry->l_key = lkey;
1657			sg1entry->len = skb_data_size - immediate_len;
1658			sg1entry->vaddr =
1659				ehea_map_vaddr(skb->data + immediate_len);
1660			swqe->descriptors++;
1661		}
1662	} else {
1663		skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1664		swqe->immediate_data_length = skb_data_size;
1665	}
1666}
1667
1668static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1669				    struct ehea_swqe *swqe, u32 lkey)
1670{
1671	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1672	skb_frag_t *frag;
1673	int nfrags, sg1entry_contains_frag_data, i;
1674
1675	nfrags = skb_shinfo(skb)->nr_frags;
1676	sg1entry = &swqe->u.immdata_desc.sg_entry;
1677	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1678	sg1entry_contains_frag_data = 0;
1679
1680	write_swqe2_immediate(skb, swqe, lkey);
1681
1682	/* write descriptors */
1683	if (nfrags > 0) {
1684		if (swqe->descriptors == 0) {
1685			/* sg1entry not yet used */
1686			frag = &skb_shinfo(skb)->frags[0];
1687
1688			/* copy sg1entry data */
1689			sg1entry->l_key = lkey;
1690			sg1entry->len = skb_frag_size(frag);
1691			sg1entry->vaddr =
1692				ehea_map_vaddr(skb_frag_address(frag));
1693			swqe->descriptors++;
1694			sg1entry_contains_frag_data = 1;
1695		}
1696
1697		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1698
1699			frag = &skb_shinfo(skb)->frags[i];
1700			sgentry = &sg_list[i - sg1entry_contains_frag_data];
1701
1702			sgentry->l_key = lkey;
1703			sgentry->len = skb_frag_size(frag);
1704			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1705			swqe->descriptors++;
1706		}
1707	}
1708}
1709
1710static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1711{
1712	int ret = 0;
1713	u64 hret;
1714	u8 reg_type;
1715
1716	/* De/Register untagged packets */
1717	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1718	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1719				     port->logical_port_id,
1720				     reg_type, port->mac_addr, 0, hcallid);
1721	if (hret != H_SUCCESS) {
1722		pr_err("%sregistering bc address failed (tagged)\n",
1723		       hcallid == H_REG_BCMC ? "" : "de");
1724		ret = -EIO;
1725		goto out_herr;
1726	}
1727
1728	/* De/Register VLAN packets */
1729	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1730	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1731				     port->logical_port_id,
1732				     reg_type, port->mac_addr, 0, hcallid);
1733	if (hret != H_SUCCESS) {
1734		pr_err("%sregistering bc address failed (vlan)\n",
1735		       hcallid == H_REG_BCMC ? "" : "de");
1736		ret = -EIO;
1737	}
1738out_herr:
1739	return ret;
1740}
1741
1742static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1743{
1744	struct ehea_port *port = netdev_priv(dev);
1745	struct sockaddr *mac_addr = sa;
1746	struct hcp_ehea_port_cb0 *cb0;
1747	int ret;
1748	u64 hret;
1749
1750	if (!is_valid_ether_addr(mac_addr->sa_data)) {
1751		ret = -EADDRNOTAVAIL;
1752		goto out;
1753	}
1754
1755	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1756	if (!cb0) {
1757		pr_err("no mem for cb0\n");
1758		ret = -ENOMEM;
1759		goto out;
1760	}
1761
1762	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1763
1764	cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1765
1766	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1767				       port->logical_port_id, H_PORT_CB0,
1768				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1769	if (hret != H_SUCCESS) {
1770		ret = -EIO;
1771		goto out_free;
1772	}
1773
1774	memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1775
1776	/* Deregister old MAC in pHYP */
1777	if (port->state == EHEA_PORT_UP) {
1778		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1779		if (ret)
1780			goto out_upregs;
1781	}
1782
1783	port->mac_addr = cb0->port_mac_addr << 16;
1784
1785	/* Register new MAC in pHYP */
1786	if (port->state == EHEA_PORT_UP) {
1787		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1788		if (ret)
1789			goto out_upregs;
1790	}
1791
1792	ret = 0;
1793
1794out_upregs:
1795	ehea_update_bcmc_registrations();
1796out_free:
1797	free_page((unsigned long)cb0);
1798out:
1799	return ret;
1800}
1801
1802static void ehea_promiscuous_error(u64 hret, int enable)
1803{
1804	if (hret == H_AUTHORITY)
1805		pr_info("Hypervisor denied %sabling promiscuous mode\n",
1806			enable == 1 ? "en" : "dis");
1807	else
1808		pr_err("failed %sabling promiscuous mode\n",
1809		       enable == 1 ? "en" : "dis");
1810}
1811
1812static void ehea_promiscuous(struct net_device *dev, int enable)
1813{
1814	struct ehea_port *port = netdev_priv(dev);
1815	struct hcp_ehea_port_cb7 *cb7;
1816	u64 hret;
1817
1818	if (enable == port->promisc)
1819		return;
1820
1821	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1822	if (!cb7) {
1823		pr_err("no mem for cb7\n");
1824		goto out;
1825	}
1826
1827	/* Modify Pxs_DUCQPN in CB7 */
1828	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1829
1830	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1831				       port->logical_port_id,
1832				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1833	if (hret) {
1834		ehea_promiscuous_error(hret, enable);
1835		goto out;
1836	}
1837
1838	port->promisc = enable;
1839out:
1840	free_page((unsigned long)cb7);
1841}
1842
1843static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1844				     u32 hcallid)
1845{
1846	u64 hret;
1847	u8 reg_type;
1848
1849	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1850	if (mc_mac_addr == 0)
1851		reg_type |= EHEA_BCMC_SCOPE_ALL;
1852
1853	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1854				     port->logical_port_id,
1855				     reg_type, mc_mac_addr, 0, hcallid);
1856	if (hret)
1857		goto out;
1858
1859	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1860	if (mc_mac_addr == 0)
1861		reg_type |= EHEA_BCMC_SCOPE_ALL;
1862
1863	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1864				     port->logical_port_id,
1865				     reg_type, mc_mac_addr, 0, hcallid);
1866out:
1867	return hret;
1868}
1869
1870static int ehea_drop_multicast_list(struct net_device *dev)
1871{
1872	struct ehea_port *port = netdev_priv(dev);
1873	struct ehea_mc_list *mc_entry = port->mc_list;
1874	struct list_head *pos;
1875	struct list_head *temp;
1876	int ret = 0;
1877	u64 hret;
1878
1879	list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1880		mc_entry = list_entry(pos, struct ehea_mc_list, list);
1881
1882		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1883						 H_DEREG_BCMC);
1884		if (hret) {
1885			pr_err("failed deregistering mcast MAC\n");
1886			ret = -EIO;
1887		}
1888
1889		list_del(pos);
1890		kfree(mc_entry);
1891	}
1892	return ret;
1893}
1894
1895static void ehea_allmulti(struct net_device *dev, int enable)
1896{
1897	struct ehea_port *port = netdev_priv(dev);
1898	u64 hret;
1899
1900	if (!port->allmulti) {
1901		if (enable) {
1902			/* Enable ALLMULTI */
1903			ehea_drop_multicast_list(dev);
1904			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1905			if (!hret)
1906				port->allmulti = 1;
1907			else
1908				netdev_err(dev,
1909					   "failed enabling IFF_ALLMULTI\n");
1910		}
1911	} else {
1912		if (!enable) {
1913			/* Disable ALLMULTI */
1914			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1915			if (!hret)
1916				port->allmulti = 0;
1917			else
1918				netdev_err(dev,
1919					   "failed disabling IFF_ALLMULTI\n");
1920		}
1921	}
1922}
1923
1924static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1925{
1926	struct ehea_mc_list *ehea_mcl_entry;
1927	u64 hret;
1928
1929	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1930	if (!ehea_mcl_entry)
1931		return;
1932
1933	INIT_LIST_HEAD(&ehea_mcl_entry->list);
1934
1935	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1936
1937	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1938					 H_REG_BCMC);
1939	if (!hret)
1940		list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1941	else {
1942		pr_err("failed registering mcast MAC\n");
1943		kfree(ehea_mcl_entry);
1944	}
1945}
1946
1947static void ehea_set_multicast_list(struct net_device *dev)
1948{
1949	struct ehea_port *port = netdev_priv(dev);
1950	struct netdev_hw_addr *ha;
1951	int ret;
1952
1953	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1954
1955	if (dev->flags & IFF_ALLMULTI) {
1956		ehea_allmulti(dev, 1);
1957		goto out;
1958	}
1959	ehea_allmulti(dev, 0);
1960
1961	if (!netdev_mc_empty(dev)) {
1962		ret = ehea_drop_multicast_list(dev);
1963		if (ret) {
1964			/* Dropping the current multicast list failed.
1965			 * Enabling ALL_MULTI is the best we can do.
1966			 */
1967			ehea_allmulti(dev, 1);
1968		}
1969
1970		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1971			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1972				port->adapter->max_mc_mac);
1973			goto out;
1974		}
1975
1976		netdev_for_each_mc_addr(ha, dev)
1977			ehea_add_multicast_entry(port, ha->addr);
1978
1979	}
1980out:
1981	ehea_update_bcmc_registrations();
1982}
1983
1984static int ehea_change_mtu(struct net_device *dev, int new_mtu)
1985{
1986	if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE))
1987		return -EINVAL;
1988	dev->mtu = new_mtu;
1989	return 0;
1990}
1991
1992static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1993{
1994	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1995
1996	if (skb->protocol != htons(ETH_P_IP))
1997		return;
1998
1999	if (skb->ip_summed == CHECKSUM_PARTIAL)
2000		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
2001
2002	swqe->ip_start = skb_network_offset(skb);
2003	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
2004
2005	switch (ip_hdr(skb)->protocol) {
2006	case IPPROTO_UDP:
2007		if (skb->ip_summed == CHECKSUM_PARTIAL)
2008			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2009
2010		swqe->tcp_offset = swqe->ip_end + 1 +
2011				   offsetof(struct udphdr, check);
2012		break;
2013
2014	case IPPROTO_TCP:
2015		if (skb->ip_summed == CHECKSUM_PARTIAL)
2016			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2017
2018		swqe->tcp_offset = swqe->ip_end + 1 +
2019				   offsetof(struct tcphdr, check);
2020		break;
2021	}
2022}
2023
2024static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2025		       struct ehea_swqe *swqe, u32 lkey)
2026{
2027	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2028
2029	xmit_common(skb, swqe);
2030
2031	write_swqe2_data(skb, dev, swqe, lkey);
2032}
2033
2034static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2035		       struct ehea_swqe *swqe)
2036{
2037	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2038
2039	xmit_common(skb, swqe);
2040
2041	if (!skb->data_len)
2042		skb_copy_from_linear_data(skb, imm_data, skb->len);
2043	else
2044		skb_copy_bits(skb, 0, imm_data, skb->len);
2045
2046	swqe->immediate_data_length = skb->len;
2047	dev_consume_skb_any(skb);
2048}
2049
2050static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2051{
2052	struct ehea_port *port = netdev_priv(dev);
2053	struct ehea_swqe *swqe;
2054	u32 lkey;
2055	int swqe_index;
2056	struct ehea_port_res *pr;
2057	struct netdev_queue *txq;
2058
2059	pr = &port->port_res[skb_get_queue_mapping(skb)];
2060	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2061
2062	swqe = ehea_get_swqe(pr->qp, &swqe_index);
2063	memset(swqe, 0, SWQE_HEADER_SIZE);
2064	atomic_dec(&pr->swqe_avail);
2065
2066	if (vlan_tx_tag_present(skb)) {
2067		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2068		swqe->vlan_tag = vlan_tx_tag_get(skb);
2069	}
2070
2071	pr->tx_packets++;
2072	pr->tx_bytes += skb->len;
2073
2074	if (skb->len <= SWQE3_MAX_IMM) {
2075		u32 sig_iv = port->sig_comp_iv;
2076		u32 swqe_num = pr->swqe_id_counter;
2077		ehea_xmit3(skb, dev, swqe);
2078		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2079			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2080		if (pr->swqe_ll_count >= (sig_iv - 1)) {
2081			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2082						      sig_iv);
2083			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2084			pr->swqe_ll_count = 0;
2085		} else
2086			pr->swqe_ll_count += 1;
2087	} else {
2088		swqe->wr_id =
2089			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2090		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2091		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2092		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2093		pr->sq_skba.arr[pr->sq_skba.index] = skb;
2094
2095		pr->sq_skba.index++;
2096		pr->sq_skba.index &= (pr->sq_skba.len - 1);
2097
2098		lkey = pr->send_mr.lkey;
2099		ehea_xmit2(skb, dev, swqe, lkey);
2100		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2101	}
2102	pr->swqe_id_counter += 1;
2103
2104	netif_info(port, tx_queued, dev,
2105		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2106	if (netif_msg_tx_queued(port))
2107		ehea_dump(swqe, 512, "swqe");
2108
2109	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2110		netif_tx_stop_queue(txq);
2111		swqe->tx_control |= EHEA_SWQE_PURGE;
2112	}
2113
2114	ehea_post_swqe(pr->qp, swqe);
2115
2116	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2117		pr->p_stats.queue_stopped++;
2118		netif_tx_stop_queue(txq);
2119	}
2120
2121	return NETDEV_TX_OK;
2122}
2123
2124static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2125{
2126	struct ehea_port *port = netdev_priv(dev);
2127	struct ehea_adapter *adapter = port->adapter;
2128	struct hcp_ehea_port_cb1 *cb1;
2129	int index;
2130	u64 hret;
2131	int err = 0;
2132
2133	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2134	if (!cb1) {
2135		pr_err("no mem for cb1\n");
2136		err = -ENOMEM;
2137		goto out;
2138	}
2139
2140	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2141				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2142	if (hret != H_SUCCESS) {
2143		pr_err("query_ehea_port failed\n");
2144		err = -EINVAL;
2145		goto out;
2146	}
2147
2148	index = (vid / 64);
2149	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2150
2151	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2152				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2153	if (hret != H_SUCCESS) {
2154		pr_err("modify_ehea_port failed\n");
2155		err = -EINVAL;
2156	}
2157out:
2158	free_page((unsigned long)cb1);
2159	return err;
2160}
2161
2162static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2163{
2164	struct ehea_port *port = netdev_priv(dev);
2165	struct ehea_adapter *adapter = port->adapter;
2166	struct hcp_ehea_port_cb1 *cb1;
2167	int index;
2168	u64 hret;
2169	int err = 0;
2170
2171	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2172	if (!cb1) {
2173		pr_err("no mem for cb1\n");
2174		err = -ENOMEM;
2175		goto out;
2176	}
2177
2178	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2179				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2180	if (hret != H_SUCCESS) {
2181		pr_err("query_ehea_port failed\n");
2182		err = -EINVAL;
2183		goto out;
2184	}
2185
2186	index = (vid / 64);
2187	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2188
2189	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2190				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2191	if (hret != H_SUCCESS) {
2192		pr_err("modify_ehea_port failed\n");
2193		err = -EINVAL;
2194	}
2195out:
2196	free_page((unsigned long)cb1);
2197	return err;
2198}
2199
2200static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2201{
2202	int ret = -EIO;
2203	u64 hret;
2204	u16 dummy16 = 0;
2205	u64 dummy64 = 0;
2206	struct hcp_modify_qp_cb0 *cb0;
2207
2208	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2209	if (!cb0) {
2210		ret = -ENOMEM;
2211		goto out;
2212	}
2213
2214	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2215				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2216	if (hret != H_SUCCESS) {
2217		pr_err("query_ehea_qp failed (1)\n");
2218		goto out;
2219	}
2220
2221	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2222	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2223				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2224				     &dummy64, &dummy64, &dummy16, &dummy16);
2225	if (hret != H_SUCCESS) {
2226		pr_err("modify_ehea_qp failed (1)\n");
2227		goto out;
2228	}
2229
2230	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2231				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2232	if (hret != H_SUCCESS) {
2233		pr_err("query_ehea_qp failed (2)\n");
2234		goto out;
2235	}
2236
2237	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2238	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2239				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2240				     &dummy64, &dummy64, &dummy16, &dummy16);
2241	if (hret != H_SUCCESS) {
2242		pr_err("modify_ehea_qp failed (2)\n");
2243		goto out;
2244	}
2245
2246	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2247				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2248	if (hret != H_SUCCESS) {
2249		pr_err("query_ehea_qp failed (3)\n");
2250		goto out;
2251	}
2252
2253	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2254	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2255				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2256				     &dummy64, &dummy64, &dummy16, &dummy16);
2257	if (hret != H_SUCCESS) {
2258		pr_err("modify_ehea_qp failed (3)\n");
2259		goto out;
2260	}
2261
2262	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2263				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2264	if (hret != H_SUCCESS) {
2265		pr_err("query_ehea_qp failed (4)\n");
2266		goto out;
2267	}
2268
2269	ret = 0;
2270out:
2271	free_page((unsigned long)cb0);
2272	return ret;
2273}
2274
2275static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2276{
2277	int ret, i;
2278	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2279	enum ehea_eq_type eq_type = EHEA_EQ;
2280
2281	port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2282				   EHEA_MAX_ENTRIES_EQ, 1);
2283	if (!port->qp_eq) {
2284		ret = -EINVAL;
2285		pr_err("ehea_create_eq failed (qp_eq)\n");
2286		goto out_kill_eq;
2287	}
2288
2289	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2290	pr_cfg.max_entries_scq = sq_entries * 2;
2291	pr_cfg.max_entries_sq = sq_entries;
2292	pr_cfg.max_entries_rq1 = rq1_entries;
2293	pr_cfg.max_entries_rq2 = rq2_entries;
2294	pr_cfg.max_entries_rq3 = rq3_entries;
2295
2296	pr_cfg_small_rx.max_entries_rcq = 1;
2297	pr_cfg_small_rx.max_entries_scq = sq_entries;
2298	pr_cfg_small_rx.max_entries_sq = sq_entries;
2299	pr_cfg_small_rx.max_entries_rq1 = 1;
2300	pr_cfg_small_rx.max_entries_rq2 = 1;
2301	pr_cfg_small_rx.max_entries_rq3 = 1;
2302
2303	for (i = 0; i < def_qps; i++) {
2304		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2305		if (ret)
2306			goto out_clean_pr;
2307	}
2308	for (i = def_qps; i < def_qps; i++) {
2309		ret = ehea_init_port_res(port, &port->port_res[i],
2310					 &pr_cfg_small_rx, i);
2311		if (ret)
2312			goto out_clean_pr;
2313	}
2314
2315	return 0;
2316
2317out_clean_pr:
2318	while (--i >= 0)
2319		ehea_clean_portres(port, &port->port_res[i]);
2320
2321out_kill_eq:
2322	ehea_destroy_eq(port->qp_eq);
2323	return ret;
2324}
2325
2326static int ehea_clean_all_portres(struct ehea_port *port)
2327{
2328	int ret = 0;
2329	int i;
2330
2331	for (i = 0; i < port->num_def_qps; i++)
2332		ret |= ehea_clean_portres(port, &port->port_res[i]);
2333
2334	ret |= ehea_destroy_eq(port->qp_eq);
2335
2336	return ret;
2337}
2338
2339static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2340{
2341	if (adapter->active_ports)
2342		return;
2343
2344	ehea_rem_mr(&adapter->mr);
2345}
2346
2347static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2348{
2349	if (adapter->active_ports)
2350		return 0;
2351
2352	return ehea_reg_kernel_mr(adapter, &adapter->mr);
2353}
2354
2355static int ehea_up(struct net_device *dev)
2356{
2357	int ret, i;
2358	struct ehea_port *port = netdev_priv(dev);
2359
2360	if (port->state == EHEA_PORT_UP)
2361		return 0;
2362
2363	ret = ehea_port_res_setup(port, port->num_def_qps);
2364	if (ret) {
2365		netdev_err(dev, "port_res_failed\n");
2366		goto out;
2367	}
2368
2369	/* Set default QP for this port */
2370	ret = ehea_configure_port(port);
2371	if (ret) {
2372		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2373		goto out_clean_pr;
2374	}
2375
2376	ret = ehea_reg_interrupts(dev);
2377	if (ret) {
2378		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2379		goto out_clean_pr;
2380	}
2381
2382	for (i = 0; i < port->num_def_qps; i++) {
2383		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2384		if (ret) {
2385			netdev_err(dev, "activate_qp failed\n");
2386			goto out_free_irqs;
2387		}
2388	}
2389
2390	for (i = 0; i < port->num_def_qps; i++) {
2391		ret = ehea_fill_port_res(&port->port_res[i]);
2392		if (ret) {
2393			netdev_err(dev, "out_free_irqs\n");
2394			goto out_free_irqs;
2395		}
2396	}
2397
2398	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2399	if (ret) {
2400		ret = -EIO;
2401		goto out_free_irqs;
2402	}
2403
2404	port->state = EHEA_PORT_UP;
2405
2406	ret = 0;
2407	goto out;
2408
2409out_free_irqs:
2410	ehea_free_interrupts(dev);
2411
2412out_clean_pr:
2413	ehea_clean_all_portres(port);
2414out:
2415	if (ret)
2416		netdev_info(dev, "Failed starting. ret=%i\n", ret);
2417
2418	ehea_update_bcmc_registrations();
2419	ehea_update_firmware_handles();
2420
2421	return ret;
2422}
2423
2424static void port_napi_disable(struct ehea_port *port)
2425{
2426	int i;
2427
2428	for (i = 0; i < port->num_def_qps; i++)
2429		napi_disable(&port->port_res[i].napi);
2430}
2431
2432static void port_napi_enable(struct ehea_port *port)
2433{
2434	int i;
2435
2436	for (i = 0; i < port->num_def_qps; i++)
2437		napi_enable(&port->port_res[i].napi);
2438}
2439
2440static int ehea_open(struct net_device *dev)
2441{
2442	int ret;
2443	struct ehea_port *port = netdev_priv(dev);
2444
2445	mutex_lock(&port->port_lock);
2446
2447	netif_info(port, ifup, dev, "enabling port\n");
2448
2449	ret = ehea_up(dev);
2450	if (!ret) {
2451		port_napi_enable(port);
2452		netif_tx_start_all_queues(dev);
2453	}
2454
2455	mutex_unlock(&port->port_lock);
2456	schedule_delayed_work(&port->stats_work,
2457			      round_jiffies_relative(msecs_to_jiffies(1000)));
2458
2459	return ret;
2460}
2461
2462static int ehea_down(struct net_device *dev)
2463{
2464	int ret;
2465	struct ehea_port *port = netdev_priv(dev);
2466
2467	if (port->state == EHEA_PORT_DOWN)
2468		return 0;
2469
2470	ehea_drop_multicast_list(dev);
2471	ehea_allmulti(dev, 0);
2472	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2473
2474	ehea_free_interrupts(dev);
2475
2476	port->state = EHEA_PORT_DOWN;
2477
2478	ehea_update_bcmc_registrations();
2479
2480	ret = ehea_clean_all_portres(port);
2481	if (ret)
2482		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2483
2484	ehea_update_firmware_handles();
2485
2486	return ret;
2487}
2488
2489static int ehea_stop(struct net_device *dev)
2490{
2491	int ret;
2492	struct ehea_port *port = netdev_priv(dev);
2493
2494	netif_info(port, ifdown, dev, "disabling port\n");
2495
2496	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2497	cancel_work_sync(&port->reset_task);
2498	cancel_delayed_work_sync(&port->stats_work);
2499	mutex_lock(&port->port_lock);
2500	netif_tx_stop_all_queues(dev);
2501	port_napi_disable(port);
2502	ret = ehea_down(dev);
2503	mutex_unlock(&port->port_lock);
2504	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2505	return ret;
2506}
2507
2508static void ehea_purge_sq(struct ehea_qp *orig_qp)
2509{
2510	struct ehea_qp qp = *orig_qp;
2511	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2512	struct ehea_swqe *swqe;
2513	int wqe_index;
2514	int i;
2515
2516	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2517		swqe = ehea_get_swqe(&qp, &wqe_index);
2518		swqe->tx_control |= EHEA_SWQE_PURGE;
2519	}
2520}
2521
2522static void ehea_flush_sq(struct ehea_port *port)
2523{
2524	int i;
2525
2526	for (i = 0; i < port->num_def_qps; i++) {
2527		struct ehea_port_res *pr = &port->port_res[i];
2528		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2529		int ret;
2530
2531		ret = wait_event_timeout(port->swqe_avail_wq,
2532			 atomic_read(&pr->swqe_avail) >= swqe_max,
2533			 msecs_to_jiffies(100));
2534
2535		if (!ret) {
2536			pr_err("WARNING: sq not flushed completely\n");
2537			break;
2538		}
2539	}
2540}
2541
2542static int ehea_stop_qps(struct net_device *dev)
2543{
2544	struct ehea_port *port = netdev_priv(dev);
2545	struct ehea_adapter *adapter = port->adapter;
2546	struct hcp_modify_qp_cb0 *cb0;
2547	int ret = -EIO;
2548	int dret;
2549	int i;
2550	u64 hret;
2551	u64 dummy64 = 0;
2552	u16 dummy16 = 0;
2553
2554	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2555	if (!cb0) {
2556		ret = -ENOMEM;
2557		goto out;
2558	}
2559
2560	for (i = 0; i < (port->num_def_qps); i++) {
2561		struct ehea_port_res *pr =  &port->port_res[i];
2562		struct ehea_qp *qp = pr->qp;
2563
2564		/* Purge send queue */
2565		ehea_purge_sq(qp);
2566
2567		/* Disable queue pair */
2568		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2569					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2570					    cb0);
2571		if (hret != H_SUCCESS) {
2572			pr_err("query_ehea_qp failed (1)\n");
2573			goto out;
2574		}
2575
2576		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2577		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2578
2579		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2580					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2581							    1), cb0, &dummy64,
2582					     &dummy64, &dummy16, &dummy16);
2583		if (hret != H_SUCCESS) {
2584			pr_err("modify_ehea_qp failed (1)\n");
2585			goto out;
2586		}
2587
2588		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2589					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2590					    cb0);
2591		if (hret != H_SUCCESS) {
2592			pr_err("query_ehea_qp failed (2)\n");
2593			goto out;
2594		}
2595
2596		/* deregister shared memory regions */
2597		dret = ehea_rem_smrs(pr);
2598		if (dret) {
2599			pr_err("unreg shared memory region failed\n");
2600			goto out;
2601		}
2602	}
2603
2604	ret = 0;
2605out:
2606	free_page((unsigned long)cb0);
2607
2608	return ret;
2609}
2610
2611static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2612{
2613	struct ehea_qp qp = *orig_qp;
2614	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2615	struct ehea_rwqe *rwqe;
2616	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2617	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2618	struct sk_buff *skb;
2619	u32 lkey = pr->recv_mr.lkey;
2620
2621
2622	int i;
2623	int index;
2624
2625	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2626		rwqe = ehea_get_next_rwqe(&qp, 2);
2627		rwqe->sg_list[0].l_key = lkey;
2628		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2629		skb = skba_rq2[index];
2630		if (skb)
2631			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2632	}
2633
2634	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2635		rwqe = ehea_get_next_rwqe(&qp, 3);
2636		rwqe->sg_list[0].l_key = lkey;
2637		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2638		skb = skba_rq3[index];
2639		if (skb)
2640			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2641	}
2642}
2643
2644static int ehea_restart_qps(struct net_device *dev)
2645{
2646	struct ehea_port *port = netdev_priv(dev);
2647	struct ehea_adapter *adapter = port->adapter;
2648	int ret = 0;
2649	int i;
2650
2651	struct hcp_modify_qp_cb0 *cb0;
2652	u64 hret;
2653	u64 dummy64 = 0;
2654	u16 dummy16 = 0;
2655
2656	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2657	if (!cb0) {
2658		ret = -ENOMEM;
2659		goto out;
2660	}
2661
2662	for (i = 0; i < (port->num_def_qps); i++) {
2663		struct ehea_port_res *pr =  &port->port_res[i];
2664		struct ehea_qp *qp = pr->qp;
2665
2666		ret = ehea_gen_smrs(pr);
2667		if (ret) {
2668			netdev_err(dev, "creation of shared memory regions failed\n");
2669			goto out;
2670		}
2671
2672		ehea_update_rqs(qp, pr);
2673
2674		/* Enable queue pair */
2675		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2676					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2677					    cb0);
2678		if (hret != H_SUCCESS) {
2679			netdev_err(dev, "query_ehea_qp failed (1)\n");
2680			goto out;
2681		}
2682
2683		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2684		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2685
2686		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2687					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2688							    1), cb0, &dummy64,
2689					     &dummy64, &dummy16, &dummy16);
2690		if (hret != H_SUCCESS) {
2691			netdev_err(dev, "modify_ehea_qp failed (1)\n");
2692			goto out;
2693		}
2694
2695		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2696					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2697					    cb0);
2698		if (hret != H_SUCCESS) {
2699			netdev_err(dev, "query_ehea_qp failed (2)\n");
2700			goto out;
2701		}
2702
2703		/* refill entire queue */
2704		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2705		ehea_refill_rq2(pr, 0);
2706		ehea_refill_rq3(pr, 0);
2707	}
2708out:
2709	free_page((unsigned long)cb0);
2710
2711	return ret;
2712}
2713
2714static void ehea_reset_port(struct work_struct *work)
2715{
2716	int ret;
2717	struct ehea_port *port =
2718		container_of(work, struct ehea_port, reset_task);
2719	struct net_device *dev = port->netdev;
2720
2721	mutex_lock(&dlpar_mem_lock);
2722	port->resets++;
2723	mutex_lock(&port->port_lock);
2724	netif_tx_disable(dev);
2725
2726	port_napi_disable(port);
2727
2728	ehea_down(dev);
2729
2730	ret = ehea_up(dev);
2731	if (ret)
2732		goto out;
2733
2734	ehea_set_multicast_list(dev);
2735
2736	netif_info(port, timer, dev, "reset successful\n");
2737
2738	port_napi_enable(port);
2739
2740	netif_tx_wake_all_queues(dev);
2741out:
2742	mutex_unlock(&port->port_lock);
2743	mutex_unlock(&dlpar_mem_lock);
2744}
2745
2746static void ehea_rereg_mrs(void)
2747{
2748	int ret, i;
2749	struct ehea_adapter *adapter;
2750
2751	pr_info("LPAR memory changed - re-initializing driver\n");
2752
2753	list_for_each_entry(adapter, &adapter_list, list)
2754		if (adapter->active_ports) {
2755			/* Shutdown all ports */
2756			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2757				struct ehea_port *port = adapter->port[i];
2758				struct net_device *dev;
2759
2760				if (!port)
2761					continue;
2762
2763				dev = port->netdev;
2764
2765				if (dev->flags & IFF_UP) {
2766					mutex_lock(&port->port_lock);
2767					netif_tx_disable(dev);
2768					ehea_flush_sq(port);
2769					ret = ehea_stop_qps(dev);
2770					if (ret) {
2771						mutex_unlock(&port->port_lock);
2772						goto out;
2773					}
2774					port_napi_disable(port);
2775					mutex_unlock(&port->port_lock);
2776				}
2777				reset_sq_restart_flag(port);
2778			}
2779
2780			/* Unregister old memory region */
2781			ret = ehea_rem_mr(&adapter->mr);
2782			if (ret) {
2783				pr_err("unregister MR failed - driver inoperable!\n");
2784				goto out;
2785			}
2786		}
2787
2788	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2789
2790	list_for_each_entry(adapter, &adapter_list, list)
2791		if (adapter->active_ports) {
2792			/* Register new memory region */
2793			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2794			if (ret) {
2795				pr_err("register MR failed - driver inoperable!\n");
2796				goto out;
2797			}
2798
2799			/* Restart all ports */
2800			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2801				struct ehea_port *port = adapter->port[i];
2802
2803				if (port) {
2804					struct net_device *dev = port->netdev;
2805
2806					if (dev->flags & IFF_UP) {
2807						mutex_lock(&port->port_lock);
2808						ret = ehea_restart_qps(dev);
2809						if (!ret) {
2810							check_sqs(port);
2811							port_napi_enable(port);
2812							netif_tx_wake_all_queues(dev);
2813						} else {
2814							netdev_err(dev, "Unable to restart QPS\n");
2815						}
2816						mutex_unlock(&port->port_lock);
2817					}
2818				}
2819			}
2820		}
2821	pr_info("re-initializing driver complete\n");
2822out:
2823	return;
2824}
2825
2826static void ehea_tx_watchdog(struct net_device *dev)
2827{
2828	struct ehea_port *port = netdev_priv(dev);
2829
2830	if (netif_carrier_ok(dev) &&
2831	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2832		ehea_schedule_port_reset(port);
2833}
2834
2835static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2836{
2837	struct hcp_query_ehea *cb;
2838	u64 hret;
2839	int ret;
2840
2841	cb = (void *)get_zeroed_page(GFP_KERNEL);
2842	if (!cb) {
2843		ret = -ENOMEM;
2844		goto out;
2845	}
2846
2847	hret = ehea_h_query_ehea(adapter->handle, cb);
2848
2849	if (hret != H_SUCCESS) {
2850		ret = -EIO;
2851		goto out_herr;
2852	}
2853
2854	adapter->max_mc_mac = cb->max_mc_mac - 1;
2855	ret = 0;
2856
2857out_herr:
2858	free_page((unsigned long)cb);
2859out:
2860	return ret;
2861}
2862
2863static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2864{
2865	struct hcp_ehea_port_cb4 *cb4;
2866	u64 hret;
2867	int ret = 0;
2868
2869	*jumbo = 0;
2870
2871	/* (Try to) enable *jumbo frames */
2872	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2873	if (!cb4) {
2874		pr_err("no mem for cb4\n");
2875		ret = -ENOMEM;
2876		goto out;
2877	} else {
2878		hret = ehea_h_query_ehea_port(port->adapter->handle,
2879					      port->logical_port_id,
2880					      H_PORT_CB4,
2881					      H_PORT_CB4_JUMBO, cb4);
2882		if (hret == H_SUCCESS) {
2883			if (cb4->jumbo_frame)
2884				*jumbo = 1;
2885			else {
2886				cb4->jumbo_frame = 1;
2887				hret = ehea_h_modify_ehea_port(port->adapter->
2888							       handle,
2889							       port->
2890							       logical_port_id,
2891							       H_PORT_CB4,
2892							       H_PORT_CB4_JUMBO,
2893							       cb4);
2894				if (hret == H_SUCCESS)
2895					*jumbo = 1;
2896			}
2897		} else
2898			ret = -EINVAL;
2899
2900		free_page((unsigned long)cb4);
2901	}
2902out:
2903	return ret;
2904}
2905
2906static ssize_t ehea_show_port_id(struct device *dev,
2907				 struct device_attribute *attr, char *buf)
2908{
2909	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2910	return sprintf(buf, "%d", port->logical_port_id);
2911}
2912
2913static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id,
2914		   NULL);
2915
2916static void logical_port_release(struct device *dev)
2917{
2918	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2919	of_node_put(port->ofdev.dev.of_node);
2920}
2921
2922static struct device *ehea_register_port(struct ehea_port *port,
2923					 struct device_node *dn)
2924{
2925	int ret;
2926
2927	port->ofdev.dev.of_node = of_node_get(dn);
2928	port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2929	port->ofdev.dev.bus = &ibmebus_bus_type;
2930
2931	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2932	port->ofdev.dev.release = logical_port_release;
2933
2934	ret = of_device_register(&port->ofdev);
2935	if (ret) {
2936		pr_err("failed to register device. ret=%d\n", ret);
2937		goto out;
2938	}
2939
2940	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2941	if (ret) {
2942		pr_err("failed to register attributes, ret=%d\n", ret);
2943		goto out_unreg_of_dev;
2944	}
2945
2946	return &port->ofdev.dev;
2947
2948out_unreg_of_dev:
2949	of_device_unregister(&port->ofdev);
2950out:
2951	return NULL;
2952}
2953
2954static void ehea_unregister_port(struct ehea_port *port)
2955{
2956	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2957	of_device_unregister(&port->ofdev);
2958}
2959
2960static const struct net_device_ops ehea_netdev_ops = {
2961	.ndo_open		= ehea_open,
2962	.ndo_stop		= ehea_stop,
2963	.ndo_start_xmit		= ehea_start_xmit,
2964#ifdef CONFIG_NET_POLL_CONTROLLER
2965	.ndo_poll_controller	= ehea_netpoll,
2966#endif
2967	.ndo_get_stats64	= ehea_get_stats64,
2968	.ndo_set_mac_address	= ehea_set_mac_addr,
2969	.ndo_validate_addr	= eth_validate_addr,
2970	.ndo_set_rx_mode	= ehea_set_multicast_list,
2971	.ndo_change_mtu		= ehea_change_mtu,
2972	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,
2973	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,
2974	.ndo_tx_timeout		= ehea_tx_watchdog,
2975};
2976
2977static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2978					 u32 logical_port_id,
2979					 struct device_node *dn)
2980{
2981	int ret;
2982	struct net_device *dev;
2983	struct ehea_port *port;
2984	struct device *port_dev;
2985	int jumbo;
2986
2987	/* allocate memory for the port structures */
2988	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2989
2990	if (!dev) {
2991		ret = -ENOMEM;
2992		goto out_err;
2993	}
2994
2995	port = netdev_priv(dev);
2996
2997	mutex_init(&port->port_lock);
2998	port->state = EHEA_PORT_DOWN;
2999	port->sig_comp_iv = sq_entries / 10;
3000
3001	port->adapter = adapter;
3002	port->netdev = dev;
3003	port->logical_port_id = logical_port_id;
3004
3005	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
3006
3007	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
3008	if (!port->mc_list) {
3009		ret = -ENOMEM;
3010		goto out_free_ethdev;
3011	}
3012
3013	INIT_LIST_HEAD(&port->mc_list->list);
3014
3015	ret = ehea_sense_port_attr(port);
3016	if (ret)
3017		goto out_free_mc_list;
3018
3019	netif_set_real_num_rx_queues(dev, port->num_def_qps);
3020	netif_set_real_num_tx_queues(dev, port->num_def_qps);
3021
3022	port_dev = ehea_register_port(port, dn);
3023	if (!port_dev)
3024		goto out_free_mc_list;
3025
3026	SET_NETDEV_DEV(dev, port_dev);
3027
3028	/* initialize net_device structure */
3029	memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3030
3031	dev->netdev_ops = &ehea_netdev_ops;
3032	ehea_set_ethtool_ops(dev);
3033
3034	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3035		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3036	dev->features = NETIF_F_SG | NETIF_F_TSO |
3037		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3038		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3039		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3040	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3041			NETIF_F_IP_CSUM;
3042	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3043
3044	INIT_WORK(&port->reset_task, ehea_reset_port);
3045	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3046
3047	init_waitqueue_head(&port->swqe_avail_wq);
3048	init_waitqueue_head(&port->restart_wq);
3049
3050	memset(&port->stats, 0, sizeof(struct net_device_stats));
3051	ret = register_netdev(dev);
3052	if (ret) {
3053		pr_err("register_netdev failed. ret=%d\n", ret);
3054		goto out_unreg_port;
3055	}
3056
3057	ret = ehea_get_jumboframe_status(port, &jumbo);
3058	if (ret)
3059		netdev_err(dev, "failed determining jumbo frame status\n");
3060
3061	netdev_info(dev, "Jumbo frames are %sabled\n",
3062		    jumbo == 1 ? "en" : "dis");
3063
3064	adapter->active_ports++;
3065
3066	return port;
3067
3068out_unreg_port:
3069	ehea_unregister_port(port);
3070
3071out_free_mc_list:
3072	kfree(port->mc_list);
3073
3074out_free_ethdev:
3075	free_netdev(dev);
3076
3077out_err:
3078	pr_err("setting up logical port with id=%d failed, ret=%d\n",
3079	       logical_port_id, ret);
3080	return NULL;
3081}
3082
3083static void ehea_shutdown_single_port(struct ehea_port *port)
3084{
3085	struct ehea_adapter *adapter = port->adapter;
3086
3087	cancel_work_sync(&port->reset_task);
3088	cancel_delayed_work_sync(&port->stats_work);
3089	unregister_netdev(port->netdev);
3090	ehea_unregister_port(port);
3091	kfree(port->mc_list);
3092	free_netdev(port->netdev);
3093	adapter->active_ports--;
3094}
3095
3096static int ehea_setup_ports(struct ehea_adapter *adapter)
3097{
3098	struct device_node *lhea_dn;
3099	struct device_node *eth_dn = NULL;
3100
3101	const u32 *dn_log_port_id;
3102	int i = 0;
3103
3104	lhea_dn = adapter->ofdev->dev.of_node;
3105	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3106
3107		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3108						 NULL);
3109		if (!dn_log_port_id) {
3110			pr_err("bad device node: eth_dn name=%s\n",
3111			       eth_dn->full_name);
3112			continue;
3113		}
3114
3115		if (ehea_add_adapter_mr(adapter)) {
3116			pr_err("creating MR failed\n");
3117			of_node_put(eth_dn);
3118			return -EIO;
3119		}
3120
3121		adapter->port[i] = ehea_setup_single_port(adapter,
3122							  *dn_log_port_id,
3123							  eth_dn);
3124		if (adapter->port[i])
3125			netdev_info(adapter->port[i]->netdev,
3126				    "logical port id #%d\n", *dn_log_port_id);
3127		else
3128			ehea_remove_adapter_mr(adapter);
3129
3130		i++;
3131	}
3132	return 0;
3133}
3134
3135static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3136					   u32 logical_port_id)
3137{
3138	struct device_node *lhea_dn;
3139	struct device_node *eth_dn = NULL;
3140	const u32 *dn_log_port_id;
3141
3142	lhea_dn = adapter->ofdev->dev.of_node;
3143	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3144
3145		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3146						 NULL);
3147		if (dn_log_port_id)
3148			if (*dn_log_port_id == logical_port_id)
3149				return eth_dn;
3150	}
3151
3152	return NULL;
3153}
3154
3155static ssize_t ehea_probe_port(struct device *dev,
3156			       struct device_attribute *attr,
3157			       const char *buf, size_t count)
3158{
3159	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3160	struct ehea_port *port;
3161	struct device_node *eth_dn = NULL;
3162	int i;
3163
3164	u32 logical_port_id;
3165
3166	sscanf(buf, "%d", &logical_port_id);
3167
3168	port = ehea_get_port(adapter, logical_port_id);
3169
3170	if (port) {
3171		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3172			    logical_port_id);
3173		return -EINVAL;
3174	}
3175
3176	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3177
3178	if (!eth_dn) {
3179		pr_info("no logical port with id %d found\n", logical_port_id);
3180		return -EINVAL;
3181	}
3182
3183	if (ehea_add_adapter_mr(adapter)) {
3184		pr_err("creating MR failed\n");
3185		return -EIO;
3186	}
3187
3188	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3189
3190	of_node_put(eth_dn);
3191
3192	if (port) {
3193		for (i = 0; i < EHEA_MAX_PORTS; i++)
3194			if (!adapter->port[i]) {
3195				adapter->port[i] = port;
3196				break;
3197			}
3198
3199		netdev_info(port->netdev, "added: (logical port id=%d)\n",
3200			    logical_port_id);
3201	} else {
3202		ehea_remove_adapter_mr(adapter);
3203		return -EIO;
3204	}
3205
3206	return (ssize_t) count;
3207}
3208
3209static ssize_t ehea_remove_port(struct device *dev,
3210				struct device_attribute *attr,
3211				const char *buf, size_t count)
3212{
3213	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3214	struct ehea_port *port;
3215	int i;
3216	u32 logical_port_id;
3217
3218	sscanf(buf, "%d", &logical_port_id);
3219
3220	port = ehea_get_port(adapter, logical_port_id);
3221
3222	if (port) {
3223		netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3224			    logical_port_id);
3225
3226		ehea_shutdown_single_port(port);
3227
3228		for (i = 0; i < EHEA_MAX_PORTS; i++)
3229			if (adapter->port[i] == port) {
3230				adapter->port[i] = NULL;
3231				break;
3232			}
3233	} else {
3234		pr_err("removing port with logical port id=%d failed. port not configured.\n",
3235		       logical_port_id);
3236		return -EINVAL;
3237	}
3238
3239	ehea_remove_adapter_mr(adapter);
3240
3241	return (ssize_t) count;
3242}
3243
3244static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port);
3245static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port);
3246
3247static int ehea_create_device_sysfs(struct platform_device *dev)
3248{
3249	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3250	if (ret)
3251		goto out;
3252
3253	ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3254out:
3255	return ret;
3256}
3257
3258static void ehea_remove_device_sysfs(struct platform_device *dev)
3259{
3260	device_remove_file(&dev->dev, &dev_attr_probe_port);
3261	device_remove_file(&dev->dev, &dev_attr_remove_port);
3262}
3263
3264static int ehea_probe_adapter(struct platform_device *dev)
3265{
3266	struct ehea_adapter *adapter;
3267	const u64 *adapter_handle;
3268	int ret;
3269	int i;
3270
3271	if (!dev || !dev->dev.of_node) {
3272		pr_err("Invalid ibmebus device probed\n");
3273		return -EINVAL;
3274	}
3275
3276	adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
3277	if (!adapter) {
3278		ret = -ENOMEM;
3279		dev_err(&dev->dev, "no mem for ehea_adapter\n");
3280		goto out;
3281	}
3282
3283	list_add(&adapter->list, &adapter_list);
3284
3285	adapter->ofdev = dev;
3286
3287	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3288					 NULL);
3289	if (adapter_handle)
3290		adapter->handle = *adapter_handle;
3291
3292	if (!adapter->handle) {
3293		dev_err(&dev->dev, "failed getting handle for adapter"
3294			" '%s'\n", dev->dev.of_node->full_name);
3295		ret = -ENODEV;
3296		goto out_free_ad;
3297	}
3298
3299	adapter->pd = EHEA_PD_ID;
3300
3301	platform_set_drvdata(dev, adapter);
3302
3303
3304	/* initialize adapter and ports */
3305	/* get adapter properties */
3306	ret = ehea_sense_adapter_attr(adapter);
3307	if (ret) {
3308		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3309		goto out_free_ad;
3310	}
3311
3312	adapter->neq = ehea_create_eq(adapter,
3313				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3314	if (!adapter->neq) {
3315		ret = -EIO;
3316		dev_err(&dev->dev, "NEQ creation failed\n");
3317		goto out_free_ad;
3318	}
3319
3320	tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3321		     (unsigned long)adapter);
3322
3323	ret = ehea_create_device_sysfs(dev);
3324	if (ret)
3325		goto out_kill_eq;
3326
3327	ret = ehea_setup_ports(adapter);
3328	if (ret) {
3329		dev_err(&dev->dev, "setup_ports failed\n");
3330		goto out_rem_dev_sysfs;
3331	}
3332
3333	ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3334				  ehea_interrupt_neq, 0,
3335				  "ehea_neq", adapter);
3336	if (ret) {
3337		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3338		goto out_shutdown_ports;
3339	}
3340
3341	/* Handle any events that might be pending. */
3342	tasklet_hi_schedule(&adapter->neq_tasklet);
3343
3344	ret = 0;
3345	goto out;
3346
3347out_shutdown_ports:
3348	for (i = 0; i < EHEA_MAX_PORTS; i++)
3349		if (adapter->port[i]) {
3350			ehea_shutdown_single_port(adapter->port[i]);
3351			adapter->port[i] = NULL;
3352		}
3353
3354out_rem_dev_sysfs:
3355	ehea_remove_device_sysfs(dev);
3356
3357out_kill_eq:
3358	ehea_destroy_eq(adapter->neq);
3359
3360out_free_ad:
3361	list_del(&adapter->list);
3362	kfree(adapter);
3363
3364out:
3365	ehea_update_firmware_handles();
3366
3367	return ret;
3368}
3369
3370static int ehea_remove(struct platform_device *dev)
3371{
3372	struct ehea_adapter *adapter = platform_get_drvdata(dev);
3373	int i;
3374
3375	for (i = 0; i < EHEA_MAX_PORTS; i++)
3376		if (adapter->port[i]) {
3377			ehea_shutdown_single_port(adapter->port[i]);
3378			adapter->port[i] = NULL;
3379		}
3380
3381	ehea_remove_device_sysfs(dev);
3382
3383	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3384	tasklet_kill(&adapter->neq_tasklet);
3385
3386	ehea_destroy_eq(adapter->neq);
3387	ehea_remove_adapter_mr(adapter);
3388	list_del(&adapter->list);
3389	kfree(adapter);
3390
3391	ehea_update_firmware_handles();
3392
3393	return 0;
3394}
3395
3396static void ehea_crash_handler(void)
3397{
3398	int i;
3399
3400	if (ehea_fw_handles.arr)
3401		for (i = 0; i < ehea_fw_handles.num_entries; i++)
3402			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3403					     ehea_fw_handles.arr[i].fwh,
3404					     FORCE_FREE);
3405
3406	if (ehea_bcmc_regs.arr)
3407		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3408			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3409					      ehea_bcmc_regs.arr[i].port_id,
3410					      ehea_bcmc_regs.arr[i].reg_type,
3411					      ehea_bcmc_regs.arr[i].macaddr,
3412					      0, H_DEREG_BCMC);
3413}
3414
3415static int ehea_mem_notifier(struct notifier_block *nb,
3416                             unsigned long action, void *data)
3417{
3418	int ret = NOTIFY_BAD;
3419	struct memory_notify *arg = data;
3420
3421	mutex_lock(&dlpar_mem_lock);
3422
3423	switch (action) {
3424	case MEM_CANCEL_OFFLINE:
3425		pr_info("memory offlining canceled");
3426		/* Readd canceled memory block */
3427	case MEM_ONLINE:
3428		pr_info("memory is going online");
3429		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3430		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3431			goto out_unlock;
3432		ehea_rereg_mrs();
3433		break;
3434	case MEM_GOING_OFFLINE:
3435		pr_info("memory is going offline");
3436		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3437		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3438			goto out_unlock;
3439		ehea_rereg_mrs();
3440		break;
3441	default:
3442		break;
3443	}
3444
3445	ehea_update_firmware_handles();
3446	ret = NOTIFY_OK;
3447
3448out_unlock:
3449	mutex_unlock(&dlpar_mem_lock);
3450	return ret;
3451}
3452
3453static struct notifier_block ehea_mem_nb = {
3454	.notifier_call = ehea_mem_notifier,
3455};
3456
3457static int ehea_reboot_notifier(struct notifier_block *nb,
3458				unsigned long action, void *unused)
3459{
3460	if (action == SYS_RESTART) {
3461		pr_info("Reboot: freeing all eHEA resources\n");
3462		ibmebus_unregister_driver(&ehea_driver);
3463	}
3464	return NOTIFY_DONE;
3465}
3466
3467static struct notifier_block ehea_reboot_nb = {
3468	.notifier_call = ehea_reboot_notifier,
3469};
3470
3471static int check_module_parm(void)
3472{
3473	int ret = 0;
3474
3475	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3476	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3477		pr_info("Bad parameter: rq1_entries\n");
3478		ret = -EINVAL;
3479	}
3480	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3481	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3482		pr_info("Bad parameter: rq2_entries\n");
3483		ret = -EINVAL;
3484	}
3485	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3486	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3487		pr_info("Bad parameter: rq3_entries\n");
3488		ret = -EINVAL;
3489	}
3490	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3491	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3492		pr_info("Bad parameter: sq_entries\n");
3493		ret = -EINVAL;
3494	}
3495
3496	return ret;
3497}
3498
3499static ssize_t ehea_show_capabilities(struct device_driver *drv,
3500				      char *buf)
3501{
3502	return sprintf(buf, "%d", EHEA_CAPABILITIES);
3503}
3504
3505static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH,
3506		   ehea_show_capabilities, NULL);
3507
3508static int __init ehea_module_init(void)
3509{
3510	int ret;
3511
3512	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3513
3514	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3515	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3516
3517	mutex_init(&ehea_fw_handles.lock);
3518	spin_lock_init(&ehea_bcmc_regs.lock);
3519
3520	ret = check_module_parm();
3521	if (ret)
3522		goto out;
3523
3524	ret = ehea_create_busmap();
3525	if (ret)
3526		goto out;
3527
3528	ret = register_reboot_notifier(&ehea_reboot_nb);
3529	if (ret)
3530		pr_info("failed registering reboot notifier\n");
3531
3532	ret = register_memory_notifier(&ehea_mem_nb);
3533	if (ret)
3534		pr_info("failed registering memory remove notifier\n");
3535
3536	ret = crash_shutdown_register(ehea_crash_handler);
3537	if (ret)
3538		pr_info("failed registering crash handler\n");
3539
3540	ret = ibmebus_register_driver(&ehea_driver);
3541	if (ret) {
3542		pr_err("failed registering eHEA device driver on ebus\n");
3543		goto out2;
3544	}
3545
3546	ret = driver_create_file(&ehea_driver.driver,
3547				 &driver_attr_capabilities);
3548	if (ret) {
3549		pr_err("failed to register capabilities attribute, ret=%d\n",
3550		       ret);
3551		goto out3;
3552	}
3553
3554	return ret;
3555
3556out3:
3557	ibmebus_unregister_driver(&ehea_driver);
3558out2:
3559	unregister_memory_notifier(&ehea_mem_nb);
3560	unregister_reboot_notifier(&ehea_reboot_nb);
3561	crash_shutdown_unregister(ehea_crash_handler);
3562out:
3563	return ret;
3564}
3565
3566static void __exit ehea_module_exit(void)
3567{
3568	int ret;
3569
3570	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3571	ibmebus_unregister_driver(&ehea_driver);
3572	unregister_reboot_notifier(&ehea_reboot_nb);
3573	ret = crash_shutdown_unregister(ehea_crash_handler);
3574	if (ret)
3575		pr_info("failed unregistering crash handler\n");
3576	unregister_memory_notifier(&ehea_mem_nb);
3577	kfree(ehea_fw_handles.arr);
3578	kfree(ehea_bcmc_regs.arr);
3579	ehea_destroy_busmap();
3580}
3581
3582module_init(ehea_module_init);
3583module_exit(ehea_module_exit);