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/device.h>
  32#include <linux/in.h>
  33#include <linux/ip.h>
  34#include <linux/tcp.h>
  35#include <linux/udp.h>
  36#include <linux/if.h>
  37#include <linux/list.h>
  38#include <linux/slab.h>
  39#include <linux/if_ether.h>
  40#include <linux/notifier.h>
  41#include <linux/reboot.h>
  42#include <linux/memory.h>
  43#include <asm/kexec.h>
  44#include <linux/mutex.h>
  45#include <linux/prefetch.h>
  46
  47#include <net/ip.h>
  48
  49#include "ehea.h"
  50#include "ehea_qmr.h"
  51#include "ehea_phyp.h"
  52
  53
  54MODULE_LICENSE("GPL");
  55MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  56MODULE_DESCRIPTION("IBM eServer HEA Driver");
  57MODULE_VERSION(DRV_VERSION);
  58
  59
  60static int msg_level = -1;
  61static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  62static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  63static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  64static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  65static int use_mcs = 1;
  66static int prop_carrier_state;
  67
  68module_param(msg_level, int, 0);
  69module_param(rq1_entries, int, 0);
  70module_param(rq2_entries, int, 0);
  71module_param(rq3_entries, int, 0);
  72module_param(sq_entries, int, 0);
  73module_param(prop_carrier_state, int, 0);
  74module_param(use_mcs, int, 0);
  75
  76MODULE_PARM_DESC(msg_level, "msg_level");
  77MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  78		 "port to stack. 1:yes, 0:no.  Default = 0 ");
  79MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  80		 "[2^x - 1], x = [7..14]. Default = "
  81		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  82MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  83		 "[2^x - 1], x = [7..14]. Default = "
  84		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  85MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  86		 "[2^x - 1], x = [7..14]. Default = "
  87		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  88MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  89		 "[2^x - 1], x = [7..14]. Default = "
  90		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  91MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  92		 "Default = 1");
  93
  94static int port_name_cnt;
  95static LIST_HEAD(adapter_list);
  96static unsigned long ehea_driver_flags;
  97static DEFINE_MUTEX(dlpar_mem_lock);
  98static struct ehea_fw_handle_array ehea_fw_handles;
  99static struct ehea_bcmc_reg_array ehea_bcmc_regs;
 100
 101
 102static int ehea_probe_adapter(struct platform_device *dev);
 103
 104static int ehea_remove(struct platform_device *dev);
 105
 106static const struct of_device_id ehea_module_device_table[] = {
 107	{
 108		.name = "lhea",
 109		.compatible = "IBM,lhea",
 110	},
 111	{
 112		.type = "network",
 113		.compatible = "IBM,lhea-ethernet",
 114	},
 115	{},
 116};
 117MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 118
 119static const struct of_device_id ehea_device_table[] = {
 120	{
 121		.name = "lhea",
 122		.compatible = "IBM,lhea",
 123	},
 124	{},
 125};
 126
 127static struct platform_driver ehea_driver = {
 128	.driver = {
 129		.name = "ehea",
 130		.owner = THIS_MODULE,
 131		.of_match_table = ehea_device_table,
 132	},
 133	.probe = ehea_probe_adapter,
 134	.remove = ehea_remove,
 135};
 136
 137void ehea_dump(void *adr, int len, char *msg)
 138{
 139	int x;
 140	unsigned char *deb = adr;
 141	for (x = 0; x < len; x += 16) {
 142		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 143			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 144		deb += 16;
 145	}
 146}
 147
 148static void ehea_schedule_port_reset(struct ehea_port *port)
 149{
 150	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 151		schedule_work(&port->reset_task);
 152}
 153
 154static void ehea_update_firmware_handles(void)
 155{
 156	struct ehea_fw_handle_entry *arr = NULL;
 157	struct ehea_adapter *adapter;
 158	int num_adapters = 0;
 159	int num_ports = 0;
 160	int num_portres = 0;
 161	int i = 0;
 162	int num_fw_handles, k, l;
 163
 164	/* Determine number of handles */
 165	mutex_lock(&ehea_fw_handles.lock);
 166
 167	list_for_each_entry(adapter, &adapter_list, list) {
 168		num_adapters++;
 169
 170		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 171			struct ehea_port *port = adapter->port[k];
 172
 173			if (!port || (port->state != EHEA_PORT_UP))
 174				continue;
 175
 176			num_ports++;
 177			num_portres += port->num_def_qps;
 178		}
 179	}
 180
 181	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 182			 num_ports * EHEA_NUM_PORT_FW_HANDLES +
 183			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 184
 185	if (num_fw_handles) {
 186		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 187		if (!arr)
 188			goto out;  /* Keep the existing array */
 189	} else
 190		goto out_update;
 191
 192	list_for_each_entry(adapter, &adapter_list, list) {
 193		if (num_adapters == 0)
 194			break;
 195
 196		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 197			struct ehea_port *port = adapter->port[k];
 198
 199			if (!port || (port->state != EHEA_PORT_UP) ||
 200			    (num_ports == 0))
 201				continue;
 202
 203			for (l = 0; l < port->num_def_qps; l++) {
 204				struct ehea_port_res *pr = &port->port_res[l];
 205
 206				arr[i].adh = adapter->handle;
 207				arr[i++].fwh = pr->qp->fw_handle;
 208				arr[i].adh = adapter->handle;
 209				arr[i++].fwh = pr->send_cq->fw_handle;
 210				arr[i].adh = adapter->handle;
 211				arr[i++].fwh = pr->recv_cq->fw_handle;
 212				arr[i].adh = adapter->handle;
 213				arr[i++].fwh = pr->eq->fw_handle;
 214				arr[i].adh = adapter->handle;
 215				arr[i++].fwh = pr->send_mr.handle;
 216				arr[i].adh = adapter->handle;
 217				arr[i++].fwh = pr->recv_mr.handle;
 218			}
 219			arr[i].adh = adapter->handle;
 220			arr[i++].fwh = port->qp_eq->fw_handle;
 221			num_ports--;
 222		}
 223
 224		arr[i].adh = adapter->handle;
 225		arr[i++].fwh = adapter->neq->fw_handle;
 226
 227		if (adapter->mr.handle) {
 228			arr[i].adh = adapter->handle;
 229			arr[i++].fwh = adapter->mr.handle;
 230		}
 231		num_adapters--;
 232	}
 233
 234out_update:
 235	kfree(ehea_fw_handles.arr);
 236	ehea_fw_handles.arr = arr;
 237	ehea_fw_handles.num_entries = i;
 238out:
 239	mutex_unlock(&ehea_fw_handles.lock);
 240}
 241
 242static void ehea_update_bcmc_registrations(void)
 243{
 244	unsigned long flags;
 245	struct ehea_bcmc_reg_entry *arr = NULL;
 246	struct ehea_adapter *adapter;
 247	struct ehea_mc_list *mc_entry;
 248	int num_registrations = 0;
 249	int i = 0;
 250	int k;
 251
 252	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 253
 254	/* Determine number of registrations */
 255	list_for_each_entry(adapter, &adapter_list, list)
 256		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 257			struct ehea_port *port = adapter->port[k];
 258
 259			if (!port || (port->state != EHEA_PORT_UP))
 260				continue;
 261
 262			num_registrations += 2;	/* Broadcast registrations */
 263
 264			list_for_each_entry(mc_entry, &port->mc_list->list,list)
 265				num_registrations += 2;
 266		}
 267
 268	if (num_registrations) {
 269		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 270		if (!arr)
 271			goto out;  /* Keep the existing array */
 272	} else
 273		goto out_update;
 274
 275	list_for_each_entry(adapter, &adapter_list, list) {
 276		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 277			struct ehea_port *port = adapter->port[k];
 278
 279			if (!port || (port->state != EHEA_PORT_UP))
 280				continue;
 281
 282			if (num_registrations == 0)
 283				goto out_update;
 284
 285			arr[i].adh = adapter->handle;
 286			arr[i].port_id = port->logical_port_id;
 287			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 288					  EHEA_BCMC_UNTAGGED;
 289			arr[i++].macaddr = port->mac_addr;
 290
 291			arr[i].adh = adapter->handle;
 292			arr[i].port_id = port->logical_port_id;
 293			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 294					  EHEA_BCMC_VLANID_ALL;
 295			arr[i++].macaddr = port->mac_addr;
 296			num_registrations -= 2;
 297
 298			list_for_each_entry(mc_entry,
 299					    &port->mc_list->list, list) {
 300				if (num_registrations == 0)
 301					goto out_update;
 302
 303				arr[i].adh = adapter->handle;
 304				arr[i].port_id = port->logical_port_id;
 305				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 306						  EHEA_BCMC_UNTAGGED;
 307				if (mc_entry->macaddr == 0)
 308					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 309				arr[i++].macaddr = mc_entry->macaddr;
 310
 311				arr[i].adh = adapter->handle;
 312				arr[i].port_id = port->logical_port_id;
 313				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 314						  EHEA_BCMC_VLANID_ALL;
 315				if (mc_entry->macaddr == 0)
 316					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 317				arr[i++].macaddr = mc_entry->macaddr;
 318				num_registrations -= 2;
 319			}
 320		}
 321	}
 322
 323out_update:
 324	kfree(ehea_bcmc_regs.arr);
 325	ehea_bcmc_regs.arr = arr;
 326	ehea_bcmc_regs.num_entries = i;
 327out:
 328	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 329}
 330
 331static void ehea_get_stats64(struct net_device *dev,
 332			     struct rtnl_link_stats64 *stats)
 333{
 334	struct ehea_port *port = netdev_priv(dev);
 335	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 336	int i;
 337
 338	for (i = 0; i < port->num_def_qps; i++) {
 339		rx_packets += port->port_res[i].rx_packets;
 340		rx_bytes   += port->port_res[i].rx_bytes;
 341	}
 342
 343	for (i = 0; i < port->num_def_qps; i++) {
 344		tx_packets += port->port_res[i].tx_packets;
 345		tx_bytes   += port->port_res[i].tx_bytes;
 346	}
 347
 348	stats->tx_packets = tx_packets;
 349	stats->rx_bytes = rx_bytes;
 350	stats->tx_bytes = tx_bytes;
 351	stats->rx_packets = rx_packets;
 352
 353	stats->multicast = port->stats.multicast;
 354	stats->rx_errors = port->stats.rx_errors;
 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	if (!port) {
1172		netdev_err(NULL, "unknown portnum %x\n", portnum);
1173		return;
1174	}
1175	dev = port->netdev;
1176
1177	switch (ec) {
1178	case EHEA_EC_PORTSTATE_CHG:	/* port state change */
1179
1180		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1181			if (!netif_carrier_ok(dev)) {
1182				ret = ehea_sense_port_attr(port);
1183				if (ret) {
1184					netdev_err(dev, "failed resensing port attributes\n");
1185					break;
1186				}
1187
1188				netif_info(port, link, dev,
1189					   "Logical port up: %dMbps %s Duplex\n",
1190					   port->port_speed,
1191					   port->full_duplex == 1 ?
1192					   "Full" : "Half");
1193
1194				netif_carrier_on(dev);
1195				netif_wake_queue(dev);
1196			}
1197		} else
1198			if (netif_carrier_ok(dev)) {
1199				netif_info(port, link, dev,
1200					   "Logical port down\n");
1201				netif_carrier_off(dev);
1202				netif_tx_disable(dev);
1203			}
1204
1205		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1206			port->phy_link = EHEA_PHY_LINK_UP;
1207			netif_info(port, link, dev,
1208				   "Physical port up\n");
1209			if (prop_carrier_state)
1210				netif_carrier_on(dev);
1211		} else {
1212			port->phy_link = EHEA_PHY_LINK_DOWN;
1213			netif_info(port, link, dev,
1214				   "Physical port down\n");
1215			if (prop_carrier_state)
1216				netif_carrier_off(dev);
1217		}
1218
1219		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1220			netdev_info(dev,
1221				    "External switch port is primary port\n");
1222		else
1223			netdev_info(dev,
1224				    "External switch port is backup port\n");
1225
1226		break;
1227	case EHEA_EC_ADAPTER_MALFUNC:
1228		netdev_err(dev, "Adapter malfunction\n");
1229		break;
1230	case EHEA_EC_PORT_MALFUNC:
1231		netdev_info(dev, "Port malfunction\n");
1232		netif_carrier_off(dev);
1233		netif_tx_disable(dev);
1234		break;
1235	default:
1236		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1237		break;
1238	}
1239}
1240
1241static void ehea_neq_tasklet(unsigned long data)
1242{
1243	struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1244	struct ehea_eqe *eqe;
1245	u64 event_mask;
1246
1247	eqe = ehea_poll_eq(adapter->neq);
1248	pr_debug("eqe=%p\n", eqe);
1249
1250	while (eqe) {
1251		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1252		ehea_parse_eqe(adapter, eqe->entry);
1253		eqe = ehea_poll_eq(adapter->neq);
1254		pr_debug("next eqe=%p\n", eqe);
1255	}
1256
1257	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1258		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1259		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1260
1261	ehea_h_reset_events(adapter->handle,
1262			    adapter->neq->fw_handle, event_mask);
1263}
1264
1265static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1266{
1267	struct ehea_adapter *adapter = param;
1268	tasklet_hi_schedule(&adapter->neq_tasklet);
1269	return IRQ_HANDLED;
1270}
1271
1272
1273static int ehea_fill_port_res(struct ehea_port_res *pr)
1274{
1275	int ret;
1276	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1277
1278	ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1279
1280	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1281
1282	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1283
1284	return ret;
1285}
1286
1287static int ehea_reg_interrupts(struct net_device *dev)
1288{
1289	struct ehea_port *port = netdev_priv(dev);
1290	struct ehea_port_res *pr;
1291	int i, ret;
1292
1293
1294	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1295		 dev->name);
1296
1297	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1298				  ehea_qp_aff_irq_handler,
1299				  0, port->int_aff_name, port);
1300	if (ret) {
1301		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1302			   port->qp_eq->attr.ist1);
1303		goto out_free_qpeq;
1304	}
1305
1306	netif_info(port, ifup, dev,
1307		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1308		   port->qp_eq->attr.ist1);
1309
1310
1311	for (i = 0; i < port->num_def_qps; i++) {
1312		pr = &port->port_res[i];
1313		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1314			 "%s-queue%d", dev->name, i);
1315		ret = ibmebus_request_irq(pr->eq->attr.ist1,
1316					  ehea_recv_irq_handler,
1317					  0, pr->int_send_name, pr);
1318		if (ret) {
1319			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1320				   i, pr->eq->attr.ist1);
1321			goto out_free_req;
1322		}
1323		netif_info(port, ifup, dev,
1324			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1325			   pr->eq->attr.ist1, i);
1326	}
1327out:
1328	return ret;
1329
1330
1331out_free_req:
1332	while (--i >= 0) {
1333		u32 ist = port->port_res[i].eq->attr.ist1;
1334		ibmebus_free_irq(ist, &port->port_res[i]);
1335	}
1336
1337out_free_qpeq:
1338	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1339	i = port->num_def_qps;
1340
1341	goto out;
1342
1343}
1344
1345static void ehea_free_interrupts(struct net_device *dev)
1346{
1347	struct ehea_port *port = netdev_priv(dev);
1348	struct ehea_port_res *pr;
1349	int i;
1350
1351	/* send */
1352
1353	for (i = 0; i < port->num_def_qps; i++) {
1354		pr = &port->port_res[i];
1355		ibmebus_free_irq(pr->eq->attr.ist1, pr);
1356		netif_info(port, intr, dev,
1357			   "free send irq for res %d with handle 0x%X\n",
1358			   i, pr->eq->attr.ist1);
1359	}
1360
1361	/* associated events */
1362	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1363	netif_info(port, intr, dev,
1364		   "associated event interrupt for handle 0x%X freed\n",
1365		   port->qp_eq->attr.ist1);
1366}
1367
1368static int ehea_configure_port(struct ehea_port *port)
1369{
1370	int ret, i;
1371	u64 hret, mask;
1372	struct hcp_ehea_port_cb0 *cb0;
1373
1374	ret = -ENOMEM;
1375	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1376	if (!cb0)
1377		goto out;
1378
1379	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1380		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1381		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1382		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1383		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1384				      PXLY_RC_VLAN_FILTER)
1385		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1386
1387	for (i = 0; i < port->num_mcs; i++)
1388		if (use_mcs)
1389			cb0->default_qpn_arr[i] =
1390				port->port_res[i].qp->init_attr.qp_nr;
1391		else
1392			cb0->default_qpn_arr[i] =
1393				port->port_res[0].qp->init_attr.qp_nr;
1394
1395	if (netif_msg_ifup(port))
1396		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1397
1398	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1399	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1400
1401	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1402				       port->logical_port_id,
1403				       H_PORT_CB0, mask, cb0);
1404	ret = -EIO;
1405	if (hret != H_SUCCESS)
1406		goto out_free;
1407
1408	ret = 0;
1409
1410out_free:
1411	free_page((unsigned long)cb0);
1412out:
1413	return ret;
1414}
1415
1416static int ehea_gen_smrs(struct ehea_port_res *pr)
1417{
1418	int ret;
1419	struct ehea_adapter *adapter = pr->port->adapter;
1420
1421	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1422	if (ret)
1423		goto out;
1424
1425	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1426	if (ret)
1427		goto out_free;
1428
1429	return 0;
1430
1431out_free:
1432	ehea_rem_mr(&pr->send_mr);
1433out:
1434	pr_err("Generating SMRS failed\n");
1435	return -EIO;
1436}
1437
1438static int ehea_rem_smrs(struct ehea_port_res *pr)
1439{
1440	if ((ehea_rem_mr(&pr->send_mr)) ||
1441	    (ehea_rem_mr(&pr->recv_mr)))
1442		return -EIO;
1443	else
1444		return 0;
1445}
1446
1447static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1448{
1449	int arr_size = sizeof(void *) * max_q_entries;
1450
1451	q_skba->arr = vzalloc(arr_size);
1452	if (!q_skba->arr)
1453		return -ENOMEM;
1454
1455	q_skba->len = max_q_entries;
1456	q_skba->index = 0;
1457	q_skba->os_skbs = 0;
1458
1459	return 0;
1460}
1461
1462static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1463			      struct port_res_cfg *pr_cfg, int queue_token)
1464{
1465	struct ehea_adapter *adapter = port->adapter;
1466	enum ehea_eq_type eq_type = EHEA_EQ;
1467	struct ehea_qp_init_attr *init_attr = NULL;
1468	int ret = -EIO;
1469	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1470
1471	tx_bytes = pr->tx_bytes;
1472	tx_packets = pr->tx_packets;
1473	rx_bytes = pr->rx_bytes;
1474	rx_packets = pr->rx_packets;
1475
1476	memset(pr, 0, sizeof(struct ehea_port_res));
1477
1478	pr->tx_bytes = rx_bytes;
1479	pr->tx_packets = tx_packets;
1480	pr->rx_bytes = rx_bytes;
1481	pr->rx_packets = rx_packets;
1482
1483	pr->port = port;
1484
1485	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1486	if (!pr->eq) {
1487		pr_err("create_eq failed (eq)\n");
1488		goto out_free;
1489	}
1490
1491	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1492				     pr->eq->fw_handle,
1493				     port->logical_port_id);
1494	if (!pr->recv_cq) {
1495		pr_err("create_cq failed (cq_recv)\n");
1496		goto out_free;
1497	}
1498
1499	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1500				     pr->eq->fw_handle,
1501				     port->logical_port_id);
1502	if (!pr->send_cq) {
1503		pr_err("create_cq failed (cq_send)\n");
1504		goto out_free;
1505	}
1506
1507	if (netif_msg_ifup(port))
1508		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1509			pr->send_cq->attr.act_nr_of_cqes,
1510			pr->recv_cq->attr.act_nr_of_cqes);
1511
1512	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1513	if (!init_attr) {
1514		ret = -ENOMEM;
1515		pr_err("no mem for ehea_qp_init_attr\n");
1516		goto out_free;
1517	}
1518
1519	init_attr->low_lat_rq1 = 1;
1520	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */
1521	init_attr->rq_count = 3;
1522	init_attr->qp_token = queue_token;
1523	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1524	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1525	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1526	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1527	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1528	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1529	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1530	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1531	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1532	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1533	init_attr->port_nr = port->logical_port_id;
1534	init_attr->send_cq_handle = pr->send_cq->fw_handle;
1535	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1536	init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1537
1538	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1539	if (!pr->qp) {
1540		pr_err("create_qp failed\n");
1541		ret = -EIO;
1542		goto out_free;
1543	}
1544
1545	if (netif_msg_ifup(port))
1546		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",
1547			init_attr->qp_nr,
1548			init_attr->act_nr_send_wqes,
1549			init_attr->act_nr_rwqes_rq1,
1550			init_attr->act_nr_rwqes_rq2,
1551			init_attr->act_nr_rwqes_rq3);
1552
1553	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1554
1555	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1556	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1557	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1558	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1559	if (ret)
1560		goto out_free;
1561
1562	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1563	if (ehea_gen_smrs(pr) != 0) {
1564		ret = -EIO;
1565		goto out_free;
1566	}
1567
1568	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1569
1570	kfree(init_attr);
1571
1572	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1573
1574	ret = 0;
1575	goto out;
1576
1577out_free:
1578	kfree(init_attr);
1579	vfree(pr->sq_skba.arr);
1580	vfree(pr->rq1_skba.arr);
1581	vfree(pr->rq2_skba.arr);
1582	vfree(pr->rq3_skba.arr);
1583	ehea_destroy_qp(pr->qp);
1584	ehea_destroy_cq(pr->send_cq);
1585	ehea_destroy_cq(pr->recv_cq);
1586	ehea_destroy_eq(pr->eq);
1587out:
1588	return ret;
1589}
1590
1591static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1592{
1593	int ret, i;
1594
1595	if (pr->qp)
1596		netif_napi_del(&pr->napi);
1597
1598	ret = ehea_destroy_qp(pr->qp);
1599
1600	if (!ret) {
1601		ehea_destroy_cq(pr->send_cq);
1602		ehea_destroy_cq(pr->recv_cq);
1603		ehea_destroy_eq(pr->eq);
1604
1605		for (i = 0; i < pr->rq1_skba.len; i++)
1606			if (pr->rq1_skba.arr[i])
1607				dev_kfree_skb(pr->rq1_skba.arr[i]);
1608
1609		for (i = 0; i < pr->rq2_skba.len; i++)
1610			if (pr->rq2_skba.arr[i])
1611				dev_kfree_skb(pr->rq2_skba.arr[i]);
1612
1613		for (i = 0; i < pr->rq3_skba.len; i++)
1614			if (pr->rq3_skba.arr[i])
1615				dev_kfree_skb(pr->rq3_skba.arr[i]);
1616
1617		for (i = 0; i < pr->sq_skba.len; i++)
1618			if (pr->sq_skba.arr[i])
1619				dev_kfree_skb(pr->sq_skba.arr[i]);
1620
1621		vfree(pr->rq1_skba.arr);
1622		vfree(pr->rq2_skba.arr);
1623		vfree(pr->rq3_skba.arr);
1624		vfree(pr->sq_skba.arr);
1625		ret = ehea_rem_smrs(pr);
1626	}
1627	return ret;
1628}
1629
1630static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1631				  u32 lkey)
1632{
1633	int skb_data_size = skb_headlen(skb);
1634	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1635	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1636	unsigned int immediate_len = SWQE2_MAX_IMM;
1637
1638	swqe->descriptors = 0;
1639
1640	if (skb_is_gso(skb)) {
1641		swqe->tx_control |= EHEA_SWQE_TSO;
1642		swqe->mss = skb_shinfo(skb)->gso_size;
1643		/*
1644		 * For TSO packets we only copy the headers into the
1645		 * immediate area.
1646		 */
1647		immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1648	}
1649
1650	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1651		skb_copy_from_linear_data(skb, imm_data, immediate_len);
1652		swqe->immediate_data_length = immediate_len;
1653
1654		if (skb_data_size > immediate_len) {
1655			sg1entry->l_key = lkey;
1656			sg1entry->len = skb_data_size - immediate_len;
1657			sg1entry->vaddr =
1658				ehea_map_vaddr(skb->data + immediate_len);
1659			swqe->descriptors++;
1660		}
1661	} else {
1662		skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1663		swqe->immediate_data_length = skb_data_size;
1664	}
1665}
1666
1667static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1668				    struct ehea_swqe *swqe, u32 lkey)
1669{
1670	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1671	skb_frag_t *frag;
1672	int nfrags, sg1entry_contains_frag_data, i;
1673
1674	nfrags = skb_shinfo(skb)->nr_frags;
1675	sg1entry = &swqe->u.immdata_desc.sg_entry;
1676	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1677	sg1entry_contains_frag_data = 0;
1678
1679	write_swqe2_immediate(skb, swqe, lkey);
1680
1681	/* write descriptors */
1682	if (nfrags > 0) {
1683		if (swqe->descriptors == 0) {
1684			/* sg1entry not yet used */
1685			frag = &skb_shinfo(skb)->frags[0];
1686
1687			/* copy sg1entry data */
1688			sg1entry->l_key = lkey;
1689			sg1entry->len = skb_frag_size(frag);
1690			sg1entry->vaddr =
1691				ehea_map_vaddr(skb_frag_address(frag));
1692			swqe->descriptors++;
1693			sg1entry_contains_frag_data = 1;
1694		}
1695
1696		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1697
1698			frag = &skb_shinfo(skb)->frags[i];
1699			sgentry = &sg_list[i - sg1entry_contains_frag_data];
1700
1701			sgentry->l_key = lkey;
1702			sgentry->len = skb_frag_size(frag);
1703			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1704			swqe->descriptors++;
1705		}
1706	}
1707}
1708
1709static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1710{
1711	int ret = 0;
1712	u64 hret;
1713	u8 reg_type;
1714
1715	/* De/Register untagged packets */
1716	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1717	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1718				     port->logical_port_id,
1719				     reg_type, port->mac_addr, 0, hcallid);
1720	if (hret != H_SUCCESS) {
1721		pr_err("%sregistering bc address failed (tagged)\n",
1722		       hcallid == H_REG_BCMC ? "" : "de");
1723		ret = -EIO;
1724		goto out_herr;
1725	}
1726
1727	/* De/Register VLAN packets */
1728	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1729	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1730				     port->logical_port_id,
1731				     reg_type, port->mac_addr, 0, hcallid);
1732	if (hret != H_SUCCESS) {
1733		pr_err("%sregistering bc address failed (vlan)\n",
1734		       hcallid == H_REG_BCMC ? "" : "de");
1735		ret = -EIO;
1736	}
1737out_herr:
1738	return ret;
1739}
1740
1741static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1742{
1743	struct ehea_port *port = netdev_priv(dev);
1744	struct sockaddr *mac_addr = sa;
1745	struct hcp_ehea_port_cb0 *cb0;
1746	int ret;
1747	u64 hret;
1748
1749	if (!is_valid_ether_addr(mac_addr->sa_data)) {
1750		ret = -EADDRNOTAVAIL;
1751		goto out;
1752	}
1753
1754	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1755	if (!cb0) {
1756		pr_err("no mem for cb0\n");
1757		ret = -ENOMEM;
1758		goto out;
1759	}
1760
1761	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1762
1763	cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1764
1765	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1766				       port->logical_port_id, H_PORT_CB0,
1767				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1768	if (hret != H_SUCCESS) {
1769		ret = -EIO;
1770		goto out_free;
1771	}
1772
1773	memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1774
1775	/* Deregister old MAC in pHYP */
1776	if (port->state == EHEA_PORT_UP) {
1777		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1778		if (ret)
1779			goto out_upregs;
1780	}
1781
1782	port->mac_addr = cb0->port_mac_addr << 16;
1783
1784	/* Register new MAC in pHYP */
1785	if (port->state == EHEA_PORT_UP) {
1786		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1787		if (ret)
1788			goto out_upregs;
1789	}
1790
1791	ret = 0;
1792
1793out_upregs:
1794	ehea_update_bcmc_registrations();
1795out_free:
1796	free_page((unsigned long)cb0);
1797out:
1798	return ret;
1799}
1800
1801static void ehea_promiscuous_error(u64 hret, int enable)
1802{
1803	if (hret == H_AUTHORITY)
1804		pr_info("Hypervisor denied %sabling promiscuous mode\n",
1805			enable == 1 ? "en" : "dis");
1806	else
1807		pr_err("failed %sabling promiscuous mode\n",
1808		       enable == 1 ? "en" : "dis");
1809}
1810
1811static void ehea_promiscuous(struct net_device *dev, int enable)
1812{
1813	struct ehea_port *port = netdev_priv(dev);
1814	struct hcp_ehea_port_cb7 *cb7;
1815	u64 hret;
1816
1817	if (enable == port->promisc)
1818		return;
1819
1820	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1821	if (!cb7) {
1822		pr_err("no mem for cb7\n");
1823		goto out;
1824	}
1825
1826	/* Modify Pxs_DUCQPN in CB7 */
1827	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1828
1829	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1830				       port->logical_port_id,
1831				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1832	if (hret) {
1833		ehea_promiscuous_error(hret, enable);
1834		goto out;
1835	}
1836
1837	port->promisc = enable;
1838out:
1839	free_page((unsigned long)cb7);
1840}
1841
1842static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1843				     u32 hcallid)
1844{
1845	u64 hret;
1846	u8 reg_type;
1847
1848	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1849	if (mc_mac_addr == 0)
1850		reg_type |= EHEA_BCMC_SCOPE_ALL;
1851
1852	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1853				     port->logical_port_id,
1854				     reg_type, mc_mac_addr, 0, hcallid);
1855	if (hret)
1856		goto out;
1857
1858	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1859	if (mc_mac_addr == 0)
1860		reg_type |= EHEA_BCMC_SCOPE_ALL;
1861
1862	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1863				     port->logical_port_id,
1864				     reg_type, mc_mac_addr, 0, hcallid);
1865out:
1866	return hret;
1867}
1868
1869static int ehea_drop_multicast_list(struct net_device *dev)
1870{
1871	struct ehea_port *port = netdev_priv(dev);
1872	struct ehea_mc_list *mc_entry = port->mc_list;
1873	struct list_head *pos;
1874	struct list_head *temp;
1875	int ret = 0;
1876	u64 hret;
1877
1878	list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1879		mc_entry = list_entry(pos, struct ehea_mc_list, list);
1880
1881		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1882						 H_DEREG_BCMC);
1883		if (hret) {
1884			pr_err("failed deregistering mcast MAC\n");
1885			ret = -EIO;
1886		}
1887
1888		list_del(pos);
1889		kfree(mc_entry);
1890	}
1891	return ret;
1892}
1893
1894static void ehea_allmulti(struct net_device *dev, int enable)
1895{
1896	struct ehea_port *port = netdev_priv(dev);
1897	u64 hret;
1898
1899	if (!port->allmulti) {
1900		if (enable) {
1901			/* Enable ALLMULTI */
1902			ehea_drop_multicast_list(dev);
1903			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1904			if (!hret)
1905				port->allmulti = 1;
1906			else
1907				netdev_err(dev,
1908					   "failed enabling IFF_ALLMULTI\n");
1909		}
1910	} else {
1911		if (!enable) {
1912			/* Disable ALLMULTI */
1913			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1914			if (!hret)
1915				port->allmulti = 0;
1916			else
1917				netdev_err(dev,
1918					   "failed disabling IFF_ALLMULTI\n");
1919		}
1920	}
1921}
1922
1923static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1924{
1925	struct ehea_mc_list *ehea_mcl_entry;
1926	u64 hret;
1927
1928	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1929	if (!ehea_mcl_entry)
1930		return;
1931
1932	INIT_LIST_HEAD(&ehea_mcl_entry->list);
1933
1934	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1935
1936	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1937					 H_REG_BCMC);
1938	if (!hret)
1939		list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1940	else {
1941		pr_err("failed registering mcast MAC\n");
1942		kfree(ehea_mcl_entry);
1943	}
1944}
1945
1946static void ehea_set_multicast_list(struct net_device *dev)
1947{
1948	struct ehea_port *port = netdev_priv(dev);
1949	struct netdev_hw_addr *ha;
1950	int ret;
1951
1952	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1953
1954	if (dev->flags & IFF_ALLMULTI) {
1955		ehea_allmulti(dev, 1);
1956		goto out;
1957	}
1958	ehea_allmulti(dev, 0);
1959
1960	if (!netdev_mc_empty(dev)) {
1961		ret = ehea_drop_multicast_list(dev);
1962		if (ret) {
1963			/* Dropping the current multicast list failed.
1964			 * Enabling ALL_MULTI is the best we can do.
1965			 */
1966			ehea_allmulti(dev, 1);
1967		}
1968
1969		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1970			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1971				port->adapter->max_mc_mac);
1972			goto out;
1973		}
1974
1975		netdev_for_each_mc_addr(ha, dev)
1976			ehea_add_multicast_entry(port, ha->addr);
1977
1978	}
1979out:
1980	ehea_update_bcmc_registrations();
1981}
1982
1983static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1984{
1985	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1986
1987	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1988		return;
1989
1990	if (skb->ip_summed == CHECKSUM_PARTIAL)
1991		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1992
1993	swqe->ip_start = skb_network_offset(skb);
1994	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1995
1996	switch (ip_hdr(skb)->protocol) {
1997	case IPPROTO_UDP:
1998		if (skb->ip_summed == CHECKSUM_PARTIAL)
1999			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2000
2001		swqe->tcp_offset = swqe->ip_end + 1 +
2002				   offsetof(struct udphdr, check);
2003		break;
2004
2005	case IPPROTO_TCP:
2006		if (skb->ip_summed == CHECKSUM_PARTIAL)
2007			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
2008
2009		swqe->tcp_offset = swqe->ip_end + 1 +
2010				   offsetof(struct tcphdr, check);
2011		break;
2012	}
2013}
2014
2015static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
2016		       struct ehea_swqe *swqe, u32 lkey)
2017{
2018	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
2019
2020	xmit_common(skb, swqe);
2021
2022	write_swqe2_data(skb, dev, swqe, lkey);
2023}
2024
2025static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2026		       struct ehea_swqe *swqe)
2027{
2028	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2029
2030	xmit_common(skb, swqe);
2031
2032	if (!skb->data_len)
2033		skb_copy_from_linear_data(skb, imm_data, skb->len);
2034	else
2035		skb_copy_bits(skb, 0, imm_data, skb->len);
2036
2037	swqe->immediate_data_length = skb->len;
2038	dev_consume_skb_any(skb);
2039}
2040
2041static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2042{
2043	struct ehea_port *port = netdev_priv(dev);
2044	struct ehea_swqe *swqe;
2045	u32 lkey;
2046	int swqe_index;
2047	struct ehea_port_res *pr;
2048	struct netdev_queue *txq;
2049
2050	pr = &port->port_res[skb_get_queue_mapping(skb)];
2051	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2052
2053	swqe = ehea_get_swqe(pr->qp, &swqe_index);
2054	memset(swqe, 0, SWQE_HEADER_SIZE);
2055	atomic_dec(&pr->swqe_avail);
2056
2057	if (skb_vlan_tag_present(skb)) {
2058		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2059		swqe->vlan_tag = skb_vlan_tag_get(skb);
2060	}
2061
2062	pr->tx_packets++;
2063	pr->tx_bytes += skb->len;
2064
2065	if (skb->len <= SWQE3_MAX_IMM) {
2066		u32 sig_iv = port->sig_comp_iv;
2067		u32 swqe_num = pr->swqe_id_counter;
2068		ehea_xmit3(skb, dev, swqe);
2069		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2070			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2071		if (pr->swqe_ll_count >= (sig_iv - 1)) {
2072			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2073						      sig_iv);
2074			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2075			pr->swqe_ll_count = 0;
2076		} else
2077			pr->swqe_ll_count += 1;
2078	} else {
2079		swqe->wr_id =
2080			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2081		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2082		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2083		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2084		pr->sq_skba.arr[pr->sq_skba.index] = skb;
2085
2086		pr->sq_skba.index++;
2087		pr->sq_skba.index &= (pr->sq_skba.len - 1);
2088
2089		lkey = pr->send_mr.lkey;
2090		ehea_xmit2(skb, dev, swqe, lkey);
2091		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2092	}
2093	pr->swqe_id_counter += 1;
2094
2095	netif_info(port, tx_queued, dev,
2096		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2097	if (netif_msg_tx_queued(port))
2098		ehea_dump(swqe, 512, "swqe");
2099
2100	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2101		netif_tx_stop_queue(txq);
2102		swqe->tx_control |= EHEA_SWQE_PURGE;
2103	}
2104
2105	ehea_post_swqe(pr->qp, swqe);
2106
2107	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2108		pr->p_stats.queue_stopped++;
2109		netif_tx_stop_queue(txq);
2110	}
2111
2112	return NETDEV_TX_OK;
2113}
2114
2115static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2116{
2117	struct ehea_port *port = netdev_priv(dev);
2118	struct ehea_adapter *adapter = port->adapter;
2119	struct hcp_ehea_port_cb1 *cb1;
2120	int index;
2121	u64 hret;
2122	int err = 0;
2123
2124	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2125	if (!cb1) {
2126		pr_err("no mem for cb1\n");
2127		err = -ENOMEM;
2128		goto out;
2129	}
2130
2131	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2132				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2133	if (hret != H_SUCCESS) {
2134		pr_err("query_ehea_port failed\n");
2135		err = -EINVAL;
2136		goto out;
2137	}
2138
2139	index = (vid / 64);
2140	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2141
2142	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2143				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2144	if (hret != H_SUCCESS) {
2145		pr_err("modify_ehea_port failed\n");
2146		err = -EINVAL;
2147	}
2148out:
2149	free_page((unsigned long)cb1);
2150	return err;
2151}
2152
2153static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2154{
2155	struct ehea_port *port = netdev_priv(dev);
2156	struct ehea_adapter *adapter = port->adapter;
2157	struct hcp_ehea_port_cb1 *cb1;
2158	int index;
2159	u64 hret;
2160	int err = 0;
2161
2162	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2163	if (!cb1) {
2164		pr_err("no mem for cb1\n");
2165		err = -ENOMEM;
2166		goto out;
2167	}
2168
2169	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2170				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2171	if (hret != H_SUCCESS) {
2172		pr_err("query_ehea_port failed\n");
2173		err = -EINVAL;
2174		goto out;
2175	}
2176
2177	index = (vid / 64);
2178	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2179
2180	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2181				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2182	if (hret != H_SUCCESS) {
2183		pr_err("modify_ehea_port failed\n");
2184		err = -EINVAL;
2185	}
2186out:
2187	free_page((unsigned long)cb1);
2188	return err;
2189}
2190
2191static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2192{
2193	int ret = -EIO;
2194	u64 hret;
2195	u16 dummy16 = 0;
2196	u64 dummy64 = 0;
2197	struct hcp_modify_qp_cb0 *cb0;
2198
2199	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2200	if (!cb0) {
2201		ret = -ENOMEM;
2202		goto out;
2203	}
2204
2205	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2206				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2207	if (hret != H_SUCCESS) {
2208		pr_err("query_ehea_qp failed (1)\n");
2209		goto out;
2210	}
2211
2212	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2213	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2214				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2215				     &dummy64, &dummy64, &dummy16, &dummy16);
2216	if (hret != H_SUCCESS) {
2217		pr_err("modify_ehea_qp failed (1)\n");
2218		goto out;
2219	}
2220
2221	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2222				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2223	if (hret != H_SUCCESS) {
2224		pr_err("query_ehea_qp failed (2)\n");
2225		goto out;
2226	}
2227
2228	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2229	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2230				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2231				     &dummy64, &dummy64, &dummy16, &dummy16);
2232	if (hret != H_SUCCESS) {
2233		pr_err("modify_ehea_qp failed (2)\n");
2234		goto out;
2235	}
2236
2237	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2238				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2239	if (hret != H_SUCCESS) {
2240		pr_err("query_ehea_qp failed (3)\n");
2241		goto out;
2242	}
2243
2244	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2245	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2246				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2247				     &dummy64, &dummy64, &dummy16, &dummy16);
2248	if (hret != H_SUCCESS) {
2249		pr_err("modify_ehea_qp failed (3)\n");
2250		goto out;
2251	}
2252
2253	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2254				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2255	if (hret != H_SUCCESS) {
2256		pr_err("query_ehea_qp failed (4)\n");
2257		goto out;
2258	}
2259
2260	ret = 0;
2261out:
2262	free_page((unsigned long)cb0);
2263	return ret;
2264}
2265
2266static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2267{
2268	int ret, i;
2269	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2270	enum ehea_eq_type eq_type = EHEA_EQ;
2271
2272	port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2273				   EHEA_MAX_ENTRIES_EQ, 1);
2274	if (!port->qp_eq) {
2275		ret = -EINVAL;
2276		pr_err("ehea_create_eq failed (qp_eq)\n");
2277		goto out_kill_eq;
2278	}
2279
2280	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2281	pr_cfg.max_entries_scq = sq_entries * 2;
2282	pr_cfg.max_entries_sq = sq_entries;
2283	pr_cfg.max_entries_rq1 = rq1_entries;
2284	pr_cfg.max_entries_rq2 = rq2_entries;
2285	pr_cfg.max_entries_rq3 = rq3_entries;
2286
2287	pr_cfg_small_rx.max_entries_rcq = 1;
2288	pr_cfg_small_rx.max_entries_scq = sq_entries;
2289	pr_cfg_small_rx.max_entries_sq = sq_entries;
2290	pr_cfg_small_rx.max_entries_rq1 = 1;
2291	pr_cfg_small_rx.max_entries_rq2 = 1;
2292	pr_cfg_small_rx.max_entries_rq3 = 1;
2293
2294	for (i = 0; i < def_qps; i++) {
2295		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2296		if (ret)
2297			goto out_clean_pr;
2298	}
2299	for (i = def_qps; i < def_qps; i++) {
2300		ret = ehea_init_port_res(port, &port->port_res[i],
2301					 &pr_cfg_small_rx, i);
2302		if (ret)
2303			goto out_clean_pr;
2304	}
2305
2306	return 0;
2307
2308out_clean_pr:
2309	while (--i >= 0)
2310		ehea_clean_portres(port, &port->port_res[i]);
2311
2312out_kill_eq:
2313	ehea_destroy_eq(port->qp_eq);
2314	return ret;
2315}
2316
2317static int ehea_clean_all_portres(struct ehea_port *port)
2318{
2319	int ret = 0;
2320	int i;
2321
2322	for (i = 0; i < port->num_def_qps; i++)
2323		ret |= ehea_clean_portres(port, &port->port_res[i]);
2324
2325	ret |= ehea_destroy_eq(port->qp_eq);
2326
2327	return ret;
2328}
2329
2330static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2331{
2332	if (adapter->active_ports)
2333		return;
2334
2335	ehea_rem_mr(&adapter->mr);
2336}
2337
2338static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2339{
2340	if (adapter->active_ports)
2341		return 0;
2342
2343	return ehea_reg_kernel_mr(adapter, &adapter->mr);
2344}
2345
2346static int ehea_up(struct net_device *dev)
2347{
2348	int ret, i;
2349	struct ehea_port *port = netdev_priv(dev);
2350
2351	if (port->state == EHEA_PORT_UP)
2352		return 0;
2353
2354	ret = ehea_port_res_setup(port, port->num_def_qps);
2355	if (ret) {
2356		netdev_err(dev, "port_res_failed\n");
2357		goto out;
2358	}
2359
2360	/* Set default QP for this port */
2361	ret = ehea_configure_port(port);
2362	if (ret) {
2363		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2364		goto out_clean_pr;
2365	}
2366
2367	ret = ehea_reg_interrupts(dev);
2368	if (ret) {
2369		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2370		goto out_clean_pr;
2371	}
2372
2373	for (i = 0; i < port->num_def_qps; i++) {
2374		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2375		if (ret) {
2376			netdev_err(dev, "activate_qp failed\n");
2377			goto out_free_irqs;
2378		}
2379	}
2380
2381	for (i = 0; i < port->num_def_qps; i++) {
2382		ret = ehea_fill_port_res(&port->port_res[i]);
2383		if (ret) {
2384			netdev_err(dev, "out_free_irqs\n");
2385			goto out_free_irqs;
2386		}
2387	}
2388
2389	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2390	if (ret) {
2391		ret = -EIO;
2392		goto out_free_irqs;
2393	}
2394
2395	port->state = EHEA_PORT_UP;
2396
2397	ret = 0;
2398	goto out;
2399
2400out_free_irqs:
2401	ehea_free_interrupts(dev);
2402
2403out_clean_pr:
2404	ehea_clean_all_portres(port);
2405out:
2406	if (ret)
2407		netdev_info(dev, "Failed starting. ret=%i\n", ret);
2408
2409	ehea_update_bcmc_registrations();
2410	ehea_update_firmware_handles();
2411
2412	return ret;
2413}
2414
2415static void port_napi_disable(struct ehea_port *port)
2416{
2417	int i;
2418
2419	for (i = 0; i < port->num_def_qps; i++)
2420		napi_disable(&port->port_res[i].napi);
2421}
2422
2423static void port_napi_enable(struct ehea_port *port)
2424{
2425	int i;
2426
2427	for (i = 0; i < port->num_def_qps; i++)
2428		napi_enable(&port->port_res[i].napi);
2429}
2430
2431static int ehea_open(struct net_device *dev)
2432{
2433	int ret;
2434	struct ehea_port *port = netdev_priv(dev);
2435
2436	mutex_lock(&port->port_lock);
2437
2438	netif_info(port, ifup, dev, "enabling port\n");
2439
2440	netif_carrier_off(dev);
2441
2442	ret = ehea_up(dev);
2443	if (!ret) {
2444		port_napi_enable(port);
2445		netif_tx_start_all_queues(dev);
2446	}
2447
2448	mutex_unlock(&port->port_lock);
2449	schedule_delayed_work(&port->stats_work,
2450			      round_jiffies_relative(msecs_to_jiffies(1000)));
2451
2452	return ret;
2453}
2454
2455static int ehea_down(struct net_device *dev)
2456{
2457	int ret;
2458	struct ehea_port *port = netdev_priv(dev);
2459
2460	if (port->state == EHEA_PORT_DOWN)
2461		return 0;
2462
2463	ehea_drop_multicast_list(dev);
2464	ehea_allmulti(dev, 0);
2465	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2466
2467	ehea_free_interrupts(dev);
2468
2469	port->state = EHEA_PORT_DOWN;
2470
2471	ehea_update_bcmc_registrations();
2472
2473	ret = ehea_clean_all_portres(port);
2474	if (ret)
2475		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2476
2477	ehea_update_firmware_handles();
2478
2479	return ret;
2480}
2481
2482static int ehea_stop(struct net_device *dev)
2483{
2484	int ret;
2485	struct ehea_port *port = netdev_priv(dev);
2486
2487	netif_info(port, ifdown, dev, "disabling port\n");
2488
2489	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2490	cancel_work_sync(&port->reset_task);
2491	cancel_delayed_work_sync(&port->stats_work);
2492	mutex_lock(&port->port_lock);
2493	netif_tx_stop_all_queues(dev);
2494	port_napi_disable(port);
2495	ret = ehea_down(dev);
2496	mutex_unlock(&port->port_lock);
2497	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2498	return ret;
2499}
2500
2501static void ehea_purge_sq(struct ehea_qp *orig_qp)
2502{
2503	struct ehea_qp qp = *orig_qp;
2504	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2505	struct ehea_swqe *swqe;
2506	int wqe_index;
2507	int i;
2508
2509	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2510		swqe = ehea_get_swqe(&qp, &wqe_index);
2511		swqe->tx_control |= EHEA_SWQE_PURGE;
2512	}
2513}
2514
2515static void ehea_flush_sq(struct ehea_port *port)
2516{
2517	int i;
2518
2519	for (i = 0; i < port->num_def_qps; i++) {
2520		struct ehea_port_res *pr = &port->port_res[i];
2521		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2522		int ret;
2523
2524		ret = wait_event_timeout(port->swqe_avail_wq,
2525			 atomic_read(&pr->swqe_avail) >= swqe_max,
2526			 msecs_to_jiffies(100));
2527
2528		if (!ret) {
2529			pr_err("WARNING: sq not flushed completely\n");
2530			break;
2531		}
2532	}
2533}
2534
2535static int ehea_stop_qps(struct net_device *dev)
2536{
2537	struct ehea_port *port = netdev_priv(dev);
2538	struct ehea_adapter *adapter = port->adapter;
2539	struct hcp_modify_qp_cb0 *cb0;
2540	int ret = -EIO;
2541	int dret;
2542	int i;
2543	u64 hret;
2544	u64 dummy64 = 0;
2545	u16 dummy16 = 0;
2546
2547	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2548	if (!cb0) {
2549		ret = -ENOMEM;
2550		goto out;
2551	}
2552
2553	for (i = 0; i < (port->num_def_qps); i++) {
2554		struct ehea_port_res *pr =  &port->port_res[i];
2555		struct ehea_qp *qp = pr->qp;
2556
2557		/* Purge send queue */
2558		ehea_purge_sq(qp);
2559
2560		/* Disable queue pair */
2561		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2562					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2563					    cb0);
2564		if (hret != H_SUCCESS) {
2565			pr_err("query_ehea_qp failed (1)\n");
2566			goto out;
2567		}
2568
2569		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2570		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2571
2572		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2573					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2574							    1), cb0, &dummy64,
2575					     &dummy64, &dummy16, &dummy16);
2576		if (hret != H_SUCCESS) {
2577			pr_err("modify_ehea_qp failed (1)\n");
2578			goto out;
2579		}
2580
2581		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2582					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2583					    cb0);
2584		if (hret != H_SUCCESS) {
2585			pr_err("query_ehea_qp failed (2)\n");
2586			goto out;
2587		}
2588
2589		/* deregister shared memory regions */
2590		dret = ehea_rem_smrs(pr);
2591		if (dret) {
2592			pr_err("unreg shared memory region failed\n");
2593			goto out;
2594		}
2595	}
2596
2597	ret = 0;
2598out:
2599	free_page((unsigned long)cb0);
2600
2601	return ret;
2602}
2603
2604static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2605{
2606	struct ehea_qp qp = *orig_qp;
2607	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2608	struct ehea_rwqe *rwqe;
2609	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2610	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2611	struct sk_buff *skb;
2612	u32 lkey = pr->recv_mr.lkey;
2613
2614
2615	int i;
2616	int index;
2617
2618	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2619		rwqe = ehea_get_next_rwqe(&qp, 2);
2620		rwqe->sg_list[0].l_key = lkey;
2621		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2622		skb = skba_rq2[index];
2623		if (skb)
2624			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2625	}
2626
2627	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2628		rwqe = ehea_get_next_rwqe(&qp, 3);
2629		rwqe->sg_list[0].l_key = lkey;
2630		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2631		skb = skba_rq3[index];
2632		if (skb)
2633			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2634	}
2635}
2636
2637static int ehea_restart_qps(struct net_device *dev)
2638{
2639	struct ehea_port *port = netdev_priv(dev);
2640	struct ehea_adapter *adapter = port->adapter;
2641	int ret = 0;
2642	int i;
2643
2644	struct hcp_modify_qp_cb0 *cb0;
2645	u64 hret;
2646	u64 dummy64 = 0;
2647	u16 dummy16 = 0;
2648
2649	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2650	if (!cb0) {
2651		ret = -ENOMEM;
2652		goto out;
2653	}
2654
2655	for (i = 0; i < (port->num_def_qps); i++) {
2656		struct ehea_port_res *pr =  &port->port_res[i];
2657		struct ehea_qp *qp = pr->qp;
2658
2659		ret = ehea_gen_smrs(pr);
2660		if (ret) {
2661			netdev_err(dev, "creation of shared memory regions failed\n");
2662			goto out;
2663		}
2664
2665		ehea_update_rqs(qp, pr);
2666
2667		/* Enable queue pair */
2668		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2669					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2670					    cb0);
2671		if (hret != H_SUCCESS) {
2672			netdev_err(dev, "query_ehea_qp failed (1)\n");
2673			goto out;
2674		}
2675
2676		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2677		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2678
2679		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2680					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2681							    1), cb0, &dummy64,
2682					     &dummy64, &dummy16, &dummy16);
2683		if (hret != H_SUCCESS) {
2684			netdev_err(dev, "modify_ehea_qp failed (1)\n");
2685			goto out;
2686		}
2687
2688		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2689					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2690					    cb0);
2691		if (hret != H_SUCCESS) {
2692			netdev_err(dev, "query_ehea_qp failed (2)\n");
2693			goto out;
2694		}
2695
2696		/* refill entire queue */
2697		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2698		ehea_refill_rq2(pr, 0);
2699		ehea_refill_rq3(pr, 0);
2700	}
2701out:
2702	free_page((unsigned long)cb0);
2703
2704	return ret;
2705}
2706
2707static void ehea_reset_port(struct work_struct *work)
2708{
2709	int ret;
2710	struct ehea_port *port =
2711		container_of(work, struct ehea_port, reset_task);
2712	struct net_device *dev = port->netdev;
2713
2714	mutex_lock(&dlpar_mem_lock);
2715	port->resets++;
2716	mutex_lock(&port->port_lock);
2717	netif_tx_disable(dev);
2718
2719	port_napi_disable(port);
2720
2721	ehea_down(dev);
2722
2723	ret = ehea_up(dev);
2724	if (ret)
2725		goto out;
2726
2727	ehea_set_multicast_list(dev);
2728
2729	netif_info(port, timer, dev, "reset successful\n");
2730
2731	port_napi_enable(port);
2732
2733	netif_tx_wake_all_queues(dev);
2734out:
2735	mutex_unlock(&port->port_lock);
2736	mutex_unlock(&dlpar_mem_lock);
2737}
2738
2739static void ehea_rereg_mrs(void)
2740{
2741	int ret, i;
2742	struct ehea_adapter *adapter;
2743
2744	pr_info("LPAR memory changed - re-initializing driver\n");
2745
2746	list_for_each_entry(adapter, &adapter_list, list)
2747		if (adapter->active_ports) {
2748			/* Shutdown all ports */
2749			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2750				struct ehea_port *port = adapter->port[i];
2751				struct net_device *dev;
2752
2753				if (!port)
2754					continue;
2755
2756				dev = port->netdev;
2757
2758				if (dev->flags & IFF_UP) {
2759					mutex_lock(&port->port_lock);
2760					netif_tx_disable(dev);
2761					ehea_flush_sq(port);
2762					ret = ehea_stop_qps(dev);
2763					if (ret) {
2764						mutex_unlock(&port->port_lock);
2765						goto out;
2766					}
2767					port_napi_disable(port);
2768					mutex_unlock(&port->port_lock);
2769				}
2770				reset_sq_restart_flag(port);
2771			}
2772
2773			/* Unregister old memory region */
2774			ret = ehea_rem_mr(&adapter->mr);
2775			if (ret) {
2776				pr_err("unregister MR failed - driver inoperable!\n");
2777				goto out;
2778			}
2779		}
2780
2781	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2782
2783	list_for_each_entry(adapter, &adapter_list, list)
2784		if (adapter->active_ports) {
2785			/* Register new memory region */
2786			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2787			if (ret) {
2788				pr_err("register MR failed - driver inoperable!\n");
2789				goto out;
2790			}
2791
2792			/* Restart all ports */
2793			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2794				struct ehea_port *port = adapter->port[i];
2795
2796				if (port) {
2797					struct net_device *dev = port->netdev;
2798
2799					if (dev->flags & IFF_UP) {
2800						mutex_lock(&port->port_lock);
2801						ret = ehea_restart_qps(dev);
2802						if (!ret) {
2803							check_sqs(port);
2804							port_napi_enable(port);
2805							netif_tx_wake_all_queues(dev);
2806						} else {
2807							netdev_err(dev, "Unable to restart QPS\n");
2808						}
2809						mutex_unlock(&port->port_lock);
2810					}
2811				}
2812			}
2813		}
2814	pr_info("re-initializing driver complete\n");
2815out:
2816	return;
2817}
2818
2819static void ehea_tx_watchdog(struct net_device *dev)
2820{
2821	struct ehea_port *port = netdev_priv(dev);
2822
2823	if (netif_carrier_ok(dev) &&
2824	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2825		ehea_schedule_port_reset(port);
2826}
2827
2828static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2829{
2830	struct hcp_query_ehea *cb;
2831	u64 hret;
2832	int ret;
2833
2834	cb = (void *)get_zeroed_page(GFP_KERNEL);
2835	if (!cb) {
2836		ret = -ENOMEM;
2837		goto out;
2838	}
2839
2840	hret = ehea_h_query_ehea(adapter->handle, cb);
2841
2842	if (hret != H_SUCCESS) {
2843		ret = -EIO;
2844		goto out_herr;
2845	}
2846
2847	adapter->max_mc_mac = cb->max_mc_mac - 1;
2848	ret = 0;
2849
2850out_herr:
2851	free_page((unsigned long)cb);
2852out:
2853	return ret;
2854}
2855
2856static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2857{
2858	struct hcp_ehea_port_cb4 *cb4;
2859	u64 hret;
2860	int ret = 0;
2861
2862	*jumbo = 0;
2863
2864	/* (Try to) enable *jumbo frames */
2865	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2866	if (!cb4) {
2867		pr_err("no mem for cb4\n");
2868		ret = -ENOMEM;
2869		goto out;
2870	} else {
2871		hret = ehea_h_query_ehea_port(port->adapter->handle,
2872					      port->logical_port_id,
2873					      H_PORT_CB4,
2874					      H_PORT_CB4_JUMBO, cb4);
2875		if (hret == H_SUCCESS) {
2876			if (cb4->jumbo_frame)
2877				*jumbo = 1;
2878			else {
2879				cb4->jumbo_frame = 1;
2880				hret = ehea_h_modify_ehea_port(port->adapter->
2881							       handle,
2882							       port->
2883							       logical_port_id,
2884							       H_PORT_CB4,
2885							       H_PORT_CB4_JUMBO,
2886							       cb4);
2887				if (hret == H_SUCCESS)
2888					*jumbo = 1;
2889			}
2890		} else
2891			ret = -EINVAL;
2892
2893		free_page((unsigned long)cb4);
2894	}
2895out:
2896	return ret;
2897}
2898
2899static ssize_t ehea_show_port_id(struct device *dev,
2900				 struct device_attribute *attr, char *buf)
2901{
2902	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2903	return sprintf(buf, "%d", port->logical_port_id);
2904}
2905
2906static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2907
2908static void logical_port_release(struct device *dev)
2909{
2910	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2911	of_node_put(port->ofdev.dev.of_node);
2912}
2913
2914static struct device *ehea_register_port(struct ehea_port *port,
2915					 struct device_node *dn)
2916{
2917	int ret;
2918
2919	port->ofdev.dev.of_node = of_node_get(dn);
2920	port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2921	port->ofdev.dev.bus = &ibmebus_bus_type;
2922
2923	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2924	port->ofdev.dev.release = logical_port_release;
2925
2926	ret = of_device_register(&port->ofdev);
2927	if (ret) {
2928		pr_err("failed to register device. ret=%d\n", ret);
2929		goto out;
2930	}
2931
2932	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2933	if (ret) {
2934		pr_err("failed to register attributes, ret=%d\n", ret);
2935		goto out_unreg_of_dev;
2936	}
2937
2938	return &port->ofdev.dev;
2939
2940out_unreg_of_dev:
2941	of_device_unregister(&port->ofdev);
2942out:
2943	return NULL;
2944}
2945
2946static void ehea_unregister_port(struct ehea_port *port)
2947{
2948	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2949	of_device_unregister(&port->ofdev);
2950}
2951
2952static const struct net_device_ops ehea_netdev_ops = {
2953	.ndo_open		= ehea_open,
2954	.ndo_stop		= ehea_stop,
2955	.ndo_start_xmit		= ehea_start_xmit,
2956#ifdef CONFIG_NET_POLL_CONTROLLER
2957	.ndo_poll_controller	= ehea_netpoll,
2958#endif
2959	.ndo_get_stats64	= ehea_get_stats64,
2960	.ndo_set_mac_address	= ehea_set_mac_addr,
2961	.ndo_validate_addr	= eth_validate_addr,
2962	.ndo_set_rx_mode	= ehea_set_multicast_list,
2963	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,
2964	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,
2965	.ndo_tx_timeout		= ehea_tx_watchdog,
2966};
2967
2968static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2969					 u32 logical_port_id,
2970					 struct device_node *dn)
2971{
2972	int ret;
2973	struct net_device *dev;
2974	struct ehea_port *port;
2975	struct device *port_dev;
2976	int jumbo;
2977
2978	/* allocate memory for the port structures */
2979	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2980
2981	if (!dev) {
2982		ret = -ENOMEM;
2983		goto out_err;
2984	}
2985
2986	port = netdev_priv(dev);
2987
2988	mutex_init(&port->port_lock);
2989	port->state = EHEA_PORT_DOWN;
2990	port->sig_comp_iv = sq_entries / 10;
2991
2992	port->adapter = adapter;
2993	port->netdev = dev;
2994	port->logical_port_id = logical_port_id;
2995
2996	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2997
2998	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2999	if (!port->mc_list) {
3000		ret = -ENOMEM;
3001		goto out_free_ethdev;
3002	}
3003
3004	INIT_LIST_HEAD(&port->mc_list->list);
3005
3006	ret = ehea_sense_port_attr(port);
3007	if (ret)
3008		goto out_free_mc_list;
3009
3010	netif_set_real_num_rx_queues(dev, port->num_def_qps);
3011	netif_set_real_num_tx_queues(dev, port->num_def_qps);
3012
3013	port_dev = ehea_register_port(port, dn);
3014	if (!port_dev)
3015		goto out_free_mc_list;
3016
3017	SET_NETDEV_DEV(dev, port_dev);
3018
3019	/* initialize net_device structure */
3020	memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
3021
3022	dev->netdev_ops = &ehea_netdev_ops;
3023	ehea_set_ethtool_ops(dev);
3024
3025	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
3026		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3027	dev->features = NETIF_F_SG | NETIF_F_TSO |
3028		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3029		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3030		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3031	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3032			NETIF_F_IP_CSUM;
3033	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3034
3035	/* MTU range: 68 - 9022 */
3036	dev->min_mtu = ETH_MIN_MTU;
3037	dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3038
3039	INIT_WORK(&port->reset_task, ehea_reset_port);
3040	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3041
3042	init_waitqueue_head(&port->swqe_avail_wq);
3043	init_waitqueue_head(&port->restart_wq);
3044
3045	ret = register_netdev(dev);
3046	if (ret) {
3047		pr_err("register_netdev failed. ret=%d\n", ret);
3048		goto out_unreg_port;
3049	}
3050
3051	ret = ehea_get_jumboframe_status(port, &jumbo);
3052	if (ret)
3053		netdev_err(dev, "failed determining jumbo frame status\n");
3054
3055	netdev_info(dev, "Jumbo frames are %sabled\n",
3056		    jumbo == 1 ? "en" : "dis");
3057
3058	adapter->active_ports++;
3059
3060	return port;
3061
3062out_unreg_port:
3063	ehea_unregister_port(port);
3064
3065out_free_mc_list:
3066	kfree(port->mc_list);
3067
3068out_free_ethdev:
3069	free_netdev(dev);
3070
3071out_err:
3072	pr_err("setting up logical port with id=%d failed, ret=%d\n",
3073	       logical_port_id, ret);
3074	return NULL;
3075}
3076
3077static void ehea_shutdown_single_port(struct ehea_port *port)
3078{
3079	struct ehea_adapter *adapter = port->adapter;
3080
3081	cancel_work_sync(&port->reset_task);
3082	cancel_delayed_work_sync(&port->stats_work);
3083	unregister_netdev(port->netdev);
3084	ehea_unregister_port(port);
3085	kfree(port->mc_list);
3086	free_netdev(port->netdev);
3087	adapter->active_ports--;
3088}
3089
3090static int ehea_setup_ports(struct ehea_adapter *adapter)
3091{
3092	struct device_node *lhea_dn;
3093	struct device_node *eth_dn = NULL;
3094
3095	const u32 *dn_log_port_id;
3096	int i = 0;
3097
3098	lhea_dn = adapter->ofdev->dev.of_node;
3099	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3100
3101		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3102						 NULL);
3103		if (!dn_log_port_id) {
3104			pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3105			continue;
3106		}
3107
3108		if (ehea_add_adapter_mr(adapter)) {
3109			pr_err("creating MR failed\n");
3110			of_node_put(eth_dn);
3111			return -EIO;
3112		}
3113
3114		adapter->port[i] = ehea_setup_single_port(adapter,
3115							  *dn_log_port_id,
3116							  eth_dn);
3117		if (adapter->port[i])
3118			netdev_info(adapter->port[i]->netdev,
3119				    "logical port id #%d\n", *dn_log_port_id);
3120		else
3121			ehea_remove_adapter_mr(adapter);
3122
3123		i++;
3124	}
3125	return 0;
3126}
3127
3128static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3129					   u32 logical_port_id)
3130{
3131	struct device_node *lhea_dn;
3132	struct device_node *eth_dn = NULL;
3133	const u32 *dn_log_port_id;
3134
3135	lhea_dn = adapter->ofdev->dev.of_node;
3136	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3137
3138		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3139						 NULL);
3140		if (dn_log_port_id)
3141			if (*dn_log_port_id == logical_port_id)
3142				return eth_dn;
3143	}
3144
3145	return NULL;
3146}
3147
3148static ssize_t ehea_probe_port(struct device *dev,
3149			       struct device_attribute *attr,
3150			       const char *buf, size_t count)
3151{
3152	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3153	struct ehea_port *port;
3154	struct device_node *eth_dn = NULL;
3155	int i;
3156
3157	u32 logical_port_id;
3158
3159	sscanf(buf, "%d", &logical_port_id);
3160
3161	port = ehea_get_port(adapter, logical_port_id);
3162
3163	if (port) {
3164		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3165			    logical_port_id);
3166		return -EINVAL;
3167	}
3168
3169	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3170
3171	if (!eth_dn) {
3172		pr_info("no logical port with id %d found\n", logical_port_id);
3173		return -EINVAL;
3174	}
3175
3176	if (ehea_add_adapter_mr(adapter)) {
3177		pr_err("creating MR failed\n");
3178		return -EIO;
3179	}
3180
3181	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3182
3183	of_node_put(eth_dn);
3184
3185	if (port) {
3186		for (i = 0; i < EHEA_MAX_PORTS; i++)
3187			if (!adapter->port[i]) {
3188				adapter->port[i] = port;
3189				break;
3190			}
3191
3192		netdev_info(port->netdev, "added: (logical port id=%d)\n",
3193			    logical_port_id);
3194	} else {
3195		ehea_remove_adapter_mr(adapter);
3196		return -EIO;
3197	}
3198
3199	return (ssize_t) count;
3200}
3201
3202static ssize_t ehea_remove_port(struct device *dev,
3203				struct device_attribute *attr,
3204				const char *buf, size_t count)
3205{
3206	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3207	struct ehea_port *port;
3208	int i;
3209	u32 logical_port_id;
3210
3211	sscanf(buf, "%d", &logical_port_id);
3212
3213	port = ehea_get_port(adapter, logical_port_id);
3214
3215	if (port) {
3216		netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3217			    logical_port_id);
3218
3219		ehea_shutdown_single_port(port);
3220
3221		for (i = 0; i < EHEA_MAX_PORTS; i++)
3222			if (adapter->port[i] == port) {
3223				adapter->port[i] = NULL;
3224				break;
3225			}
3226	} else {
3227		pr_err("removing port with logical port id=%d failed. port not configured.\n",
3228		       logical_port_id);
3229		return -EINVAL;
3230	}
3231
3232	ehea_remove_adapter_mr(adapter);
3233
3234	return (ssize_t) count;
3235}
3236
3237static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3238static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3239
3240static int ehea_create_device_sysfs(struct platform_device *dev)
3241{
3242	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3243	if (ret)
3244		goto out;
3245
3246	ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3247out:
3248	return ret;
3249}
3250
3251static void ehea_remove_device_sysfs(struct platform_device *dev)
3252{
3253	device_remove_file(&dev->dev, &dev_attr_probe_port);
3254	device_remove_file(&dev->dev, &dev_attr_remove_port);
3255}
3256
3257static int ehea_reboot_notifier(struct notifier_block *nb,
3258				unsigned long action, void *unused)
3259{
3260	if (action == SYS_RESTART) {
3261		pr_info("Reboot: freeing all eHEA resources\n");
3262		ibmebus_unregister_driver(&ehea_driver);
3263	}
3264	return NOTIFY_DONE;
3265}
3266
3267static struct notifier_block ehea_reboot_nb = {
3268	.notifier_call = ehea_reboot_notifier,
3269};
3270
3271static int ehea_mem_notifier(struct notifier_block *nb,
3272			     unsigned long action, void *data)
3273{
3274	int ret = NOTIFY_BAD;
3275	struct memory_notify *arg = data;
3276
3277	mutex_lock(&dlpar_mem_lock);
3278
3279	switch (action) {
3280	case MEM_CANCEL_OFFLINE:
3281		pr_info("memory offlining canceled");
3282		/* Fall through: re-add canceled memory block */
3283
3284	case MEM_ONLINE:
3285		pr_info("memory is going online");
3286		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3287		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3288			goto out_unlock;
3289		ehea_rereg_mrs();
3290		break;
3291
3292	case MEM_GOING_OFFLINE:
3293		pr_info("memory is going offline");
3294		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3295		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3296			goto out_unlock;
3297		ehea_rereg_mrs();
3298		break;
3299
3300	default:
3301		break;
3302	}
3303
3304	ehea_update_firmware_handles();
3305	ret = NOTIFY_OK;
3306
3307out_unlock:
3308	mutex_unlock(&dlpar_mem_lock);
3309	return ret;
3310}
3311
3312static struct notifier_block ehea_mem_nb = {
3313	.notifier_call = ehea_mem_notifier,
3314};
3315
3316static void ehea_crash_handler(void)
3317{
3318	int i;
3319
3320	if (ehea_fw_handles.arr)
3321		for (i = 0; i < ehea_fw_handles.num_entries; i++)
3322			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3323					     ehea_fw_handles.arr[i].fwh,
3324					     FORCE_FREE);
3325
3326	if (ehea_bcmc_regs.arr)
3327		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3328			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3329					      ehea_bcmc_regs.arr[i].port_id,
3330					      ehea_bcmc_regs.arr[i].reg_type,
3331					      ehea_bcmc_regs.arr[i].macaddr,
3332					      0, H_DEREG_BCMC);
3333}
3334
3335static atomic_t ehea_memory_hooks_registered;
3336
3337/* Register memory hooks on probe of first adapter */
3338static int ehea_register_memory_hooks(void)
3339{
3340	int ret = 0;
3341
3342	if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3343		return 0;
3344
3345	ret = ehea_create_busmap();
3346	if (ret) {
3347		pr_info("ehea_create_busmap failed\n");
3348		goto out;
3349	}
3350
3351	ret = register_reboot_notifier(&ehea_reboot_nb);
3352	if (ret) {
3353		pr_info("register_reboot_notifier failed\n");
3354		goto out;
3355	}
3356
3357	ret = register_memory_notifier(&ehea_mem_nb);
3358	if (ret) {
3359		pr_info("register_memory_notifier failed\n");
3360		goto out2;
3361	}
3362
3363	ret = crash_shutdown_register(ehea_crash_handler);
3364	if (ret) {
3365		pr_info("crash_shutdown_register failed\n");
3366		goto out3;
3367	}
3368
3369	return 0;
3370
3371out3:
3372	unregister_memory_notifier(&ehea_mem_nb);
3373out2:
3374	unregister_reboot_notifier(&ehea_reboot_nb);
3375out:
3376	atomic_dec(&ehea_memory_hooks_registered);
3377	return ret;
3378}
3379
3380static void ehea_unregister_memory_hooks(void)
3381{
3382	/* Only remove the hooks if we've registered them */
3383	if (atomic_read(&ehea_memory_hooks_registered) == 0)
3384		return;
3385
3386	unregister_reboot_notifier(&ehea_reboot_nb);
3387	if (crash_shutdown_unregister(ehea_crash_handler))
3388		pr_info("failed unregistering crash handler\n");
3389	unregister_memory_notifier(&ehea_mem_nb);
3390}
3391
3392static int ehea_probe_adapter(struct platform_device *dev)
3393{
3394	struct ehea_adapter *adapter;
3395	const u64 *adapter_handle;
3396	int ret;
3397	int i;
3398
3399	ret = ehea_register_memory_hooks();
3400	if (ret)
3401		return ret;
3402
3403	if (!dev || !dev->dev.of_node) {
3404		pr_err("Invalid ibmebus device probed\n");
3405		return -EINVAL;
3406	}
3407
3408	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3409	if (!adapter) {
3410		ret = -ENOMEM;
3411		dev_err(&dev->dev, "no mem for ehea_adapter\n");
3412		goto out;
3413	}
3414
3415	list_add(&adapter->list, &adapter_list);
3416
3417	adapter->ofdev = dev;
3418
3419	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3420					 NULL);
3421	if (adapter_handle)
3422		adapter->handle = *adapter_handle;
3423
3424	if (!adapter->handle) {
3425		dev_err(&dev->dev, "failed getting handle for adapter"
3426			" '%pOF'\n", dev->dev.of_node);
3427		ret = -ENODEV;
3428		goto out_free_ad;
3429	}
3430
3431	adapter->pd = EHEA_PD_ID;
3432
3433	platform_set_drvdata(dev, adapter);
3434
3435
3436	/* initialize adapter and ports */
3437	/* get adapter properties */
3438	ret = ehea_sense_adapter_attr(adapter);
3439	if (ret) {
3440		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3441		goto out_free_ad;
3442	}
3443
3444	adapter->neq = ehea_create_eq(adapter,
3445				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3446	if (!adapter->neq) {
3447		ret = -EIO;
3448		dev_err(&dev->dev, "NEQ creation failed\n");
3449		goto out_free_ad;
3450	}
3451
3452	tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3453		     (unsigned long)adapter);
3454
3455	ret = ehea_create_device_sysfs(dev);
3456	if (ret)
3457		goto out_kill_eq;
3458
3459	ret = ehea_setup_ports(adapter);
3460	if (ret) {
3461		dev_err(&dev->dev, "setup_ports failed\n");
3462		goto out_rem_dev_sysfs;
3463	}
3464
3465	ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3466				  ehea_interrupt_neq, 0,
3467				  "ehea_neq", adapter);
3468	if (ret) {
3469		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3470		goto out_shutdown_ports;
3471	}
3472
3473	/* Handle any events that might be pending. */
3474	tasklet_hi_schedule(&adapter->neq_tasklet);
3475
3476	ret = 0;
3477	goto out;
3478
3479out_shutdown_ports:
3480	for (i = 0; i < EHEA_MAX_PORTS; i++)
3481		if (adapter->port[i]) {
3482			ehea_shutdown_single_port(adapter->port[i]);
3483			adapter->port[i] = NULL;
3484		}
3485
3486out_rem_dev_sysfs:
3487	ehea_remove_device_sysfs(dev);
3488
3489out_kill_eq:
3490	ehea_destroy_eq(adapter->neq);
3491
3492out_free_ad:
3493	list_del(&adapter->list);
3494
3495out:
3496	ehea_update_firmware_handles();
3497
3498	return ret;
3499}
3500
3501static int ehea_remove(struct platform_device *dev)
3502{
3503	struct ehea_adapter *adapter = platform_get_drvdata(dev);
3504	int i;
3505
3506	for (i = 0; i < EHEA_MAX_PORTS; i++)
3507		if (adapter->port[i]) {
3508			ehea_shutdown_single_port(adapter->port[i]);
3509			adapter->port[i] = NULL;
3510		}
3511
3512	ehea_remove_device_sysfs(dev);
3513
3514	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3515	tasklet_kill(&adapter->neq_tasklet);
3516
3517	ehea_destroy_eq(adapter->neq);
3518	ehea_remove_adapter_mr(adapter);
3519	list_del(&adapter->list);
3520
3521	ehea_update_firmware_handles();
3522
3523	return 0;
3524}
3525
3526static int check_module_parm(void)
3527{
3528	int ret = 0;
3529
3530	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3531	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3532		pr_info("Bad parameter: rq1_entries\n");
3533		ret = -EINVAL;
3534	}
3535	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3536	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3537		pr_info("Bad parameter: rq2_entries\n");
3538		ret = -EINVAL;
3539	}
3540	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3541	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3542		pr_info("Bad parameter: rq3_entries\n");
3543		ret = -EINVAL;
3544	}
3545	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3546	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3547		pr_info("Bad parameter: sq_entries\n");
3548		ret = -EINVAL;
3549	}
3550
3551	return ret;
3552}
3553
3554static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3555{
3556	return sprintf(buf, "%d", EHEA_CAPABILITIES);
3557}
3558
3559static DRIVER_ATTR_RO(capabilities);
3560
3561static int __init ehea_module_init(void)
3562{
3563	int ret;
3564
3565	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3566
3567	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3568	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3569
3570	mutex_init(&ehea_fw_handles.lock);
3571	spin_lock_init(&ehea_bcmc_regs.lock);
3572
3573	ret = check_module_parm();
3574	if (ret)
3575		goto out;
3576
3577	ret = ibmebus_register_driver(&ehea_driver);
3578	if (ret) {
3579		pr_err("failed registering eHEA device driver on ebus\n");
3580		goto out;
3581	}
3582
3583	ret = driver_create_file(&ehea_driver.driver,
3584				 &driver_attr_capabilities);
3585	if (ret) {
3586		pr_err("failed to register capabilities attribute, ret=%d\n",
3587		       ret);
3588		goto out2;
3589	}
3590
3591	return ret;
3592
3593out2:
3594	ibmebus_unregister_driver(&ehea_driver);
3595out:
3596	return ret;
3597}
3598
3599static void __exit ehea_module_exit(void)
3600{
3601	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3602	ibmebus_unregister_driver(&ehea_driver);
3603	ehea_unregister_memory_hooks();
3604	kfree(ehea_fw_handles.arr);
3605	kfree(ehea_bcmc_regs.arr);
3606	ehea_destroy_busmap();
3607}
3608
3609module_init(ehea_module_init);
3610module_exit(ehea_module_exit);