1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  linux/drivers/net/ethernet/ibm/ehea/ehea_main.c
   4 *
   5 *  eHEA ethernet device driver for IBM eServer System p
   6 *
   7 *  (C) Copyright IBM Corp. 2006
   8 *
   9 *  Authors:
  10 *	 Christoph Raisch <raisch@de.ibm.com>
  11 *	 Jan-Bernd Themann <themann@de.ibm.com>
  12 *	 Thomas Klein <tklein@de.ibm.com>
  13 */
  14
  15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17#include <linux/device.h>
  18#include <linux/in.h>
  19#include <linux/ip.h>
  20#include <linux/tcp.h>
  21#include <linux/udp.h>
  22#include <linux/if.h>
  23#include <linux/list.h>
  24#include <linux/slab.h>
  25#include <linux/if_ether.h>
  26#include <linux/notifier.h>
  27#include <linux/reboot.h>
  28#include <linux/memory.h>
  29#include <asm/kexec.h>
  30#include <linux/mutex.h>
  31#include <linux/prefetch.h>
  32
  33#include <net/ip.h>
  34
  35#include "ehea.h"
  36#include "ehea_qmr.h"
  37#include "ehea_phyp.h"
  38
  39
  40MODULE_LICENSE("GPL");
  41MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  42MODULE_DESCRIPTION("IBM eServer HEA Driver");
  43MODULE_VERSION(DRV_VERSION);
  44
  45
  46static int msg_level = -1;
  47static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  48static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  49static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  50static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  51static int use_mcs = 1;
  52static int prop_carrier_state;
  53
  54module_param(msg_level, int, 0);
  55module_param(rq1_entries, int, 0);
  56module_param(rq2_entries, int, 0);
  57module_param(rq3_entries, int, 0);
  58module_param(sq_entries, int, 0);
  59module_param(prop_carrier_state, int, 0);
  60module_param(use_mcs, int, 0);
  61
  62MODULE_PARM_DESC(msg_level, "msg_level");
  63MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  64		 "port to stack. 1:yes, 0:no.  Default = 0 ");
  65MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  66		 "[2^x - 1], x = [7..14]. Default = "
  67		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  68MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  69		 "[2^x - 1], x = [7..14]. Default = "
  70		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  71MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  72		 "[2^x - 1], x = [7..14]. Default = "
  73		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  74MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  75		 "[2^x - 1], x = [7..14]. Default = "
  76		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  77MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  78		 "Default = 1");
  79
  80static int port_name_cnt;
  81static LIST_HEAD(adapter_list);
  82static unsigned long ehea_driver_flags;
  83static DEFINE_MUTEX(dlpar_mem_lock);
  84static struct ehea_fw_handle_array ehea_fw_handles;
  85static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  86
  87
  88static int ehea_probe_adapter(struct platform_device *dev);
  89
  90static int ehea_remove(struct platform_device *dev);
  91
  92static const struct of_device_id ehea_module_device_table[] = {
  93	{
  94		.name = "lhea",
  95		.compatible = "IBM,lhea",
  96	},
  97	{
  98		.type = "network",
  99		.compatible = "IBM,lhea-ethernet",
 100	},
 101	{},
 102};
 103MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 104
 105static const struct of_device_id ehea_device_table[] = {
 106	{
 107		.name = "lhea",
 108		.compatible = "IBM,lhea",
 109	},
 110	{},
 111};
 112
 113static struct platform_driver ehea_driver = {
 114	.driver = {
 115		.name = "ehea",
 116		.owner = THIS_MODULE,
 117		.of_match_table = ehea_device_table,
 118	},
 119	.probe = ehea_probe_adapter,
 120	.remove = ehea_remove,
 121};
 122
 123void ehea_dump(void *adr, int len, char *msg)
 124{
 125	int x;
 126	unsigned char *deb = adr;
 127	for (x = 0; x < len; x += 16) {
 128		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 129			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 130		deb += 16;
 131	}
 132}
 133
 134static void ehea_schedule_port_reset(struct ehea_port *port)
 135{
 136	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 137		schedule_work(&port->reset_task);
 138}
 139
 140static void ehea_update_firmware_handles(void)
 141{
 142	struct ehea_fw_handle_entry *arr = NULL;
 143	struct ehea_adapter *adapter;
 144	int num_adapters = 0;
 145	int num_ports = 0;
 146	int num_portres = 0;
 147	int i = 0;
 148	int num_fw_handles, k, l;
 149
 150	/* Determine number of handles */
 151	mutex_lock(&ehea_fw_handles.lock);
 152
 153	list_for_each_entry(adapter, &adapter_list, list) {
 154		num_adapters++;
 155
 156		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 157			struct ehea_port *port = adapter->port[k];
 158
 159			if (!port || (port->state != EHEA_PORT_UP))
 160				continue;
 161
 162			num_ports++;
 163			num_portres += port->num_def_qps;
 164		}
 165	}
 166
 167	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 168			 num_ports * EHEA_NUM_PORT_FW_HANDLES +
 169			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 170
 171	if (num_fw_handles) {
 172		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 173		if (!arr)
 174			goto out;  /* Keep the existing array */
 175	} else
 176		goto out_update;
 177
 178	list_for_each_entry(adapter, &adapter_list, list) {
 179		if (num_adapters == 0)
 180			break;
 181
 182		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 183			struct ehea_port *port = adapter->port[k];
 184
 185			if (!port || (port->state != EHEA_PORT_UP) ||
 186			    (num_ports == 0))
 187				continue;
 188
 189			for (l = 0; l < port->num_def_qps; l++) {
 190				struct ehea_port_res *pr = &port->port_res[l];
 191
 192				arr[i].adh = adapter->handle;
 193				arr[i++].fwh = pr->qp->fw_handle;
 194				arr[i].adh = adapter->handle;
 195				arr[i++].fwh = pr->send_cq->fw_handle;
 196				arr[i].adh = adapter->handle;
 197				arr[i++].fwh = pr->recv_cq->fw_handle;
 198				arr[i].adh = adapter->handle;
 199				arr[i++].fwh = pr->eq->fw_handle;
 200				arr[i].adh = adapter->handle;
 201				arr[i++].fwh = pr->send_mr.handle;
 202				arr[i].adh = adapter->handle;
 203				arr[i++].fwh = pr->recv_mr.handle;
 204			}
 205			arr[i].adh = adapter->handle;
 206			arr[i++].fwh = port->qp_eq->fw_handle;
 207			num_ports--;
 208		}
 209
 210		arr[i].adh = adapter->handle;
 211		arr[i++].fwh = adapter->neq->fw_handle;
 212
 213		if (adapter->mr.handle) {
 214			arr[i].adh = adapter->handle;
 215			arr[i++].fwh = adapter->mr.handle;
 216		}
 217		num_adapters--;
 218	}
 219
 220out_update:
 221	kfree(ehea_fw_handles.arr);
 222	ehea_fw_handles.arr = arr;
 223	ehea_fw_handles.num_entries = i;
 224out:
 225	mutex_unlock(&ehea_fw_handles.lock);
 226}
 227
 228static void ehea_update_bcmc_registrations(void)
 229{
 230	unsigned long flags;
 231	struct ehea_bcmc_reg_entry *arr = NULL;
 232	struct ehea_adapter *adapter;
 233	struct ehea_mc_list *mc_entry;
 234	int num_registrations = 0;
 235	int i = 0;
 236	int k;
 237
 238	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 239
 240	/* Determine number of registrations */
 241	list_for_each_entry(adapter, &adapter_list, list)
 242		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 243			struct ehea_port *port = adapter->port[k];
 244
 245			if (!port || (port->state != EHEA_PORT_UP))
 246				continue;
 247
 248			num_registrations += 2;	/* Broadcast registrations */
 249
 250			list_for_each_entry(mc_entry, &port->mc_list->list,list)
 251				num_registrations += 2;
 252		}
 253
 254	if (num_registrations) {
 255		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 256		if (!arr)
 257			goto out;  /* Keep the existing array */
 258	} else
 259		goto out_update;
 260
 261	list_for_each_entry(adapter, &adapter_list, list) {
 262		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 263			struct ehea_port *port = adapter->port[k];
 264
 265			if (!port || (port->state != EHEA_PORT_UP))
 266				continue;
 267
 268			if (num_registrations == 0)
 269				goto out_update;
 270
 271			arr[i].adh = adapter->handle;
 272			arr[i].port_id = port->logical_port_id;
 273			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 274					  EHEA_BCMC_UNTAGGED;
 275			arr[i++].macaddr = port->mac_addr;
 276
 277			arr[i].adh = adapter->handle;
 278			arr[i].port_id = port->logical_port_id;
 279			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 280					  EHEA_BCMC_VLANID_ALL;
 281			arr[i++].macaddr = port->mac_addr;
 282			num_registrations -= 2;
 283
 284			list_for_each_entry(mc_entry,
 285					    &port->mc_list->list, list) {
 286				if (num_registrations == 0)
 287					goto out_update;
 288
 289				arr[i].adh = adapter->handle;
 290				arr[i].port_id = port->logical_port_id;
 291				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 292						  EHEA_BCMC_UNTAGGED;
 293				if (mc_entry->macaddr == 0)
 294					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 295				arr[i++].macaddr = mc_entry->macaddr;
 296
 297				arr[i].adh = adapter->handle;
 298				arr[i].port_id = port->logical_port_id;
 299				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 300						  EHEA_BCMC_VLANID_ALL;
 301				if (mc_entry->macaddr == 0)
 302					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 303				arr[i++].macaddr = mc_entry->macaddr;
 304				num_registrations -= 2;
 305			}
 306		}
 307	}
 308
 309out_update:
 310	kfree(ehea_bcmc_regs.arr);
 311	ehea_bcmc_regs.arr = arr;
 312	ehea_bcmc_regs.num_entries = i;
 313out:
 314	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 315}
 316
 317static void ehea_get_stats64(struct net_device *dev,
 318			     struct rtnl_link_stats64 *stats)
 319{
 320	struct ehea_port *port = netdev_priv(dev);
 321	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 322	int i;
 323
 324	for (i = 0; i < port->num_def_qps; i++) {
 325		rx_packets += port->port_res[i].rx_packets;
 326		rx_bytes   += port->port_res[i].rx_bytes;
 327	}
 328
 329	for (i = 0; i < port->num_def_qps; i++) {
 330		tx_packets += port->port_res[i].tx_packets;
 331		tx_bytes   += port->port_res[i].tx_bytes;
 332	}
 333
 334	stats->tx_packets = tx_packets;
 335	stats->rx_bytes = rx_bytes;
 336	stats->tx_bytes = tx_bytes;
 337	stats->rx_packets = rx_packets;
 338
 339	stats->multicast = port->stats.multicast;
 340	stats->rx_errors = port->stats.rx_errors;
 341}
 342
 343static void ehea_update_stats(struct work_struct *work)
 344{
 345	struct ehea_port *port =
 346		container_of(work, struct ehea_port, stats_work.work);
 347	struct net_device *dev = port->netdev;
 348	struct rtnl_link_stats64 *stats = &port->stats;
 349	struct hcp_ehea_port_cb2 *cb2;
 350	u64 hret;
 351
 352	cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 353	if (!cb2) {
 354		netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 355		goto resched;
 356	}
 357
 358	hret = ehea_h_query_ehea_port(port->adapter->handle,
 359				      port->logical_port_id,
 360				      H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 361	if (hret != H_SUCCESS) {
 362		netdev_err(dev, "query_ehea_port failed\n");
 363		goto out_herr;
 364	}
 365
 366	if (netif_msg_hw(port))
 367		ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 368
 369	stats->multicast = cb2->rxmcp;
 370	stats->rx_errors = cb2->rxuerr;
 371
 372out_herr:
 373	free_page((unsigned long)cb2);
 374resched:
 375	schedule_delayed_work(&port->stats_work,
 376			      round_jiffies_relative(msecs_to_jiffies(1000)));
 377}
 378
 379static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 380{
 381	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 382	struct net_device *dev = pr->port->netdev;
 383	int max_index_mask = pr->rq1_skba.len - 1;
 384	int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 385	int adder = 0;
 386	int i;
 387
 388	pr->rq1_skba.os_skbs = 0;
 389
 390	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 391		if (nr_of_wqes > 0)
 392			pr->rq1_skba.index = index;
 393		pr->rq1_skba.os_skbs = fill_wqes;
 394		return;
 395	}
 396
 397	for (i = 0; i < fill_wqes; i++) {
 398		if (!skb_arr_rq1[index]) {
 399			skb_arr_rq1[index] = netdev_alloc_skb(dev,
 400							      EHEA_L_PKT_SIZE);
 401			if (!skb_arr_rq1[index]) {
 402				pr->rq1_skba.os_skbs = fill_wqes - i;
 403				break;
 404			}
 405		}
 406		index--;
 407		index &= max_index_mask;
 408		adder++;
 409	}
 410
 411	if (adder == 0)
 412		return;
 413
 414	/* Ring doorbell */
 415	ehea_update_rq1a(pr->qp, adder);
 416}
 417
 418static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 419{
 420	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 421	struct net_device *dev = pr->port->netdev;
 422	int i;
 423
 424	if (nr_rq1a > pr->rq1_skba.len) {
 425		netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 426		return;
 427	}
 428
 429	for (i = 0; i < nr_rq1a; i++) {
 430		skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 431		if (!skb_arr_rq1[i])
 432			break;
 433	}
 434	/* Ring doorbell */
 435	ehea_update_rq1a(pr->qp, i - 1);
 436}
 437
 438static int ehea_refill_rq_def(struct ehea_port_res *pr,
 439			      struct ehea_q_skb_arr *q_skba, int rq_nr,
 440			      int num_wqes, int wqe_type, int packet_size)
 441{
 442	struct net_device *dev = pr->port->netdev;
 443	struct ehea_qp *qp = pr->qp;
 444	struct sk_buff **skb_arr = q_skba->arr;
 445	struct ehea_rwqe *rwqe;
 446	int i, index, max_index_mask, fill_wqes;
 447	int adder = 0;
 448	int ret = 0;
 449
 450	fill_wqes = q_skba->os_skbs + num_wqes;
 451	q_skba->os_skbs = 0;
 452
 453	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 454		q_skba->os_skbs = fill_wqes;
 455		return ret;
 456	}
 457
 458	index = q_skba->index;
 459	max_index_mask = q_skba->len - 1;
 460	for (i = 0; i < fill_wqes; i++) {
 461		u64 tmp_addr;
 462		struct sk_buff *skb;
 463
 464		skb = netdev_alloc_skb_ip_align(dev, packet_size);
 465		if (!skb) {
 466			q_skba->os_skbs = fill_wqes - i;
 467			if (q_skba->os_skbs == q_skba->len - 2) {
 468				netdev_info(pr->port->netdev,
 469					    "rq%i ran dry - no mem for skb\n",
 470					    rq_nr);
 471				ret = -ENOMEM;
 472			}
 473			break;
 474		}
 475
 476		skb_arr[index] = skb;
 477		tmp_addr = ehea_map_vaddr(skb->data);
 478		if (tmp_addr == -1) {
 479			dev_consume_skb_any(skb);
 480			q_skba->os_skbs = fill_wqes - i;
 481			ret = 0;
 482			break;
 483		}
 484
 485		rwqe = ehea_get_next_rwqe(qp, rq_nr);
 486		rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 487			    | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 488		rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 489		rwqe->sg_list[0].vaddr = tmp_addr;
 490		rwqe->sg_list[0].len = packet_size;
 491		rwqe->data_segments = 1;
 492
 493		index++;
 494		index &= max_index_mask;
 495		adder++;
 496	}
 497
 498	q_skba->index = index;
 499	if (adder == 0)
 500		goto out;
 501
 502	/* Ring doorbell */
 503	iosync();
 504	if (rq_nr == 2)
 505		ehea_update_rq2a(pr->qp, adder);
 506	else
 507		ehea_update_rq3a(pr->qp, adder);
 508out:
 509	return ret;
 510}
 511
 512
 513static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 514{
 515	return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 516				  nr_of_wqes, EHEA_RWQE2_TYPE,
 517				  EHEA_RQ2_PKT_SIZE);
 518}
 519
 520
 521static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 522{
 523	return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 524				  nr_of_wqes, EHEA_RWQE3_TYPE,
 525				  EHEA_MAX_PACKET_SIZE);
 526}
 527
 528static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 529{
 530	*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 531	if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 532		return 0;
 533	if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 534	    (cqe->header_length == 0))
 535		return 0;
 536	return -EINVAL;
 537}
 538
 539static inline void ehea_fill_skb(struct net_device *dev,
 540				 struct sk_buff *skb, struct ehea_cqe *cqe,
 541				 struct ehea_port_res *pr)
 542{
 543	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */
 544
 545	skb_put(skb, length);
 546	skb->protocol = eth_type_trans(skb, dev);
 547
 548	/* The packet was not an IPV4 packet so a complemented checksum was
 549	   calculated. The value is found in the Internet Checksum field. */
 550	if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 551		skb->ip_summed = CHECKSUM_COMPLETE;
 552		skb->csum = csum_unfold(~cqe->inet_checksum_value);
 553	} else
 554		skb->ip_summed = CHECKSUM_UNNECESSARY;
 555
 556	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 557}
 558
 559static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 560					       int arr_len,
 561					       struct ehea_cqe *cqe)
 562{
 563	int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 564	struct sk_buff *skb;
 565	void *pref;
 566	int x;
 567
 568	x = skb_index + 1;
 569	x &= (arr_len - 1);
 570
 571	pref = skb_array[x];
 572	if (pref) {
 573		prefetchw(pref);
 574		prefetchw(pref + EHEA_CACHE_LINE);
 575
 576		pref = (skb_array[x]->data);
 577		prefetch(pref);
 578		prefetch(pref + EHEA_CACHE_LINE);
 579		prefetch(pref + EHEA_CACHE_LINE * 2);
 580		prefetch(pref + EHEA_CACHE_LINE * 3);
 581	}
 582
 583	skb = skb_array[skb_index];
 584	skb_array[skb_index] = NULL;
 585	return skb;
 586}
 587
 588static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 589						  int arr_len, int wqe_index)
 590{
 591	struct sk_buff *skb;
 592	void *pref;
 593	int x;
 594
 595	x = wqe_index + 1;
 596	x &= (arr_len - 1);
 597
 598	pref = skb_array[x];
 599	if (pref) {
 600		prefetchw(pref);
 601		prefetchw(pref + EHEA_CACHE_LINE);
 602
 603		pref = (skb_array[x]->data);
 604		prefetchw(pref);
 605		prefetchw(pref + EHEA_CACHE_LINE);
 606	}
 607
 608	skb = skb_array[wqe_index];
 609	skb_array[wqe_index] = NULL;
 610	return skb;
 611}
 612
 613static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 614				 struct ehea_cqe *cqe, int *processed_rq2,
 615				 int *processed_rq3)
 616{
 617	struct sk_buff *skb;
 618
 619	if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 620		pr->p_stats.err_tcp_cksum++;
 621	if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 622		pr->p_stats.err_ip_cksum++;
 623	if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 624		pr->p_stats.err_frame_crc++;
 625
 626	if (rq == 2) {
 627		*processed_rq2 += 1;
 628		skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 629		dev_kfree_skb(skb);
 630	} else if (rq == 3) {
 631		*processed_rq3 += 1;
 632		skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 633		dev_kfree_skb(skb);
 634	}
 635
 636	if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 637		if (netif_msg_rx_err(pr->port)) {
 638			pr_err("Critical receive error for QP %d. Resetting port.\n",
 639			       pr->qp->init_attr.qp_nr);
 640			ehea_dump(cqe, sizeof(*cqe), "CQE");
 641		}
 642		ehea_schedule_port_reset(pr->port);
 643		return 1;
 644	}
 645
 646	return 0;
 647}
 648
 649static int ehea_proc_rwqes(struct net_device *dev,
 650			   struct ehea_port_res *pr,
 651			   int budget)
 652{
 653	struct ehea_port *port = pr->port;
 654	struct ehea_qp *qp = pr->qp;
 655	struct ehea_cqe *cqe;
 656	struct sk_buff *skb;
 657	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 658	struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 659	struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 660	int skb_arr_rq1_len = pr->rq1_skba.len;
 661	int skb_arr_rq2_len = pr->rq2_skba.len;
 662	int skb_arr_rq3_len = pr->rq3_skba.len;
 663	int processed, processed_rq1, processed_rq2, processed_rq3;
 664	u64 processed_bytes = 0;
 665	int wqe_index, last_wqe_index, rq, port_reset;
 666
 667	processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 668	last_wqe_index = 0;
 669
 670	cqe = ehea_poll_rq1(qp, &wqe_index);
 671	while ((processed < budget) && cqe) {
 672		ehea_inc_rq1(qp);
 673		processed_rq1++;
 674		processed++;
 675		if (netif_msg_rx_status(port))
 676			ehea_dump(cqe, sizeof(*cqe), "CQE");
 677
 678		last_wqe_index = wqe_index;
 679		rmb();
 680		if (!ehea_check_cqe(cqe, &rq)) {
 681			if (rq == 1) {
 682				/* LL RQ1 */
 683				skb = get_skb_by_index_ll(skb_arr_rq1,
 684							  skb_arr_rq1_len,
 685							  wqe_index);
 686				if (unlikely(!skb)) {
 687					netif_info(port, rx_err, dev,
 688						  "LL rq1: skb=NULL\n");
 689
 690					skb = netdev_alloc_skb(dev,
 691							       EHEA_L_PKT_SIZE);
 692					if (!skb)
 693						break;
 694				}
 695				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 696						 cqe->num_bytes_transfered - 4);
 697				ehea_fill_skb(dev, skb, cqe, pr);
 698			} else if (rq == 2) {
 699				/* RQ2 */
 700				skb = get_skb_by_index(skb_arr_rq2,
 701						       skb_arr_rq2_len, cqe);
 702				if (unlikely(!skb)) {
 703					netif_err(port, rx_err, dev,
 704						  "rq2: skb=NULL\n");
 705					break;
 706				}
 707				ehea_fill_skb(dev, skb, cqe, pr);
 708				processed_rq2++;
 709			} else {
 710				/* RQ3 */
 711				skb = get_skb_by_index(skb_arr_rq3,
 712						       skb_arr_rq3_len, cqe);
 713				if (unlikely(!skb)) {
 714					netif_err(port, rx_err, dev,
 715						  "rq3: skb=NULL\n");
 716					break;
 717				}
 718				ehea_fill_skb(dev, skb, cqe, pr);
 719				processed_rq3++;
 720			}
 721
 722			processed_bytes += skb->len;
 723
 724			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 725				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 726						       cqe->vlan_tag);
 727
 728			napi_gro_receive(&pr->napi, skb);
 729		} else {
 730			pr->p_stats.poll_receive_errors++;
 731			port_reset = ehea_treat_poll_error(pr, rq, cqe,
 732							   &processed_rq2,
 733							   &processed_rq3);
 734			if (port_reset)
 735				break;
 736		}
 737		cqe = ehea_poll_rq1(qp, &wqe_index);
 738	}
 739
 740	pr->rx_packets += processed;
 741	pr->rx_bytes += processed_bytes;
 742
 743	ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 744	ehea_refill_rq2(pr, processed_rq2);
 745	ehea_refill_rq3(pr, processed_rq3);
 746
 747	return processed;
 748}
 749
 750#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 751
 752static void reset_sq_restart_flag(struct ehea_port *port)
 753{
 754	int i;
 755
 756	for (i = 0; i < port->num_def_qps; i++) {
 757		struct ehea_port_res *pr = &port->port_res[i];
 758		pr->sq_restart_flag = 0;
 759	}
 760	wake_up(&port->restart_wq);
 761}
 762
 763static void check_sqs(struct ehea_port *port)
 764{
 765	struct ehea_swqe *swqe;
 766	int swqe_index;
 767	int i;
 768
 769	for (i = 0; i < port->num_def_qps; i++) {
 770		struct ehea_port_res *pr = &port->port_res[i];
 771		int ret;
 772		swqe = ehea_get_swqe(pr->qp, &swqe_index);
 773		memset(swqe, 0, SWQE_HEADER_SIZE);
 774		atomic_dec(&pr->swqe_avail);
 775
 776		swqe->tx_control |= EHEA_SWQE_PURGE;
 777		swqe->wr_id = SWQE_RESTART_CHECK;
 778		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 779		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 780		swqe->immediate_data_length = 80;
 781
 782		ehea_post_swqe(pr->qp, swqe);
 783
 784		ret = wait_event_timeout(port->restart_wq,
 785					 pr->sq_restart_flag == 0,
 786					 msecs_to_jiffies(100));
 787
 788		if (!ret) {
 789			pr_err("HW/SW queues out of sync\n");
 790			ehea_schedule_port_reset(pr->port);
 791			return;
 792		}
 793	}
 794}
 795
 796
 797static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 798{
 799	struct sk_buff *skb;
 800	struct ehea_cq *send_cq = pr->send_cq;
 801	struct ehea_cqe *cqe;
 802	int quota = my_quota;
 803	int cqe_counter = 0;
 804	int swqe_av = 0;
 805	int index;
 806	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 807						pr - &pr->port->port_res[0]);
 808
 809	cqe = ehea_poll_cq(send_cq);
 810	while (cqe && (quota > 0)) {
 811		ehea_inc_cq(send_cq);
 812
 813		cqe_counter++;
 814		rmb();
 815
 816		if (cqe->wr_id == SWQE_RESTART_CHECK) {
 817			pr->sq_restart_flag = 1;
 818			swqe_av++;
 819			break;
 820		}
 821
 822		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 823			pr_err("Bad send completion status=0x%04X\n",
 824			       cqe->status);
 825
 826			if (netif_msg_tx_err(pr->port))
 827				ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 828
 829			if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 830				pr_err("Resetting port\n");
 831				ehea_schedule_port_reset(pr->port);
 832				break;
 833			}
 834		}
 835
 836		if (netif_msg_tx_done(pr->port))
 837			ehea_dump(cqe, sizeof(*cqe), "CQE");
 838
 839		if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 840			   == EHEA_SWQE2_TYPE)) {
 841
 842			index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 843			skb = pr->sq_skba.arr[index];
 844			dev_consume_skb_any(skb);
 845			pr->sq_skba.arr[index] = NULL;
 846		}
 847
 848		swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 849		quota--;
 850
 851		cqe = ehea_poll_cq(send_cq);
 852	}
 853
 854	ehea_update_feca(send_cq, cqe_counter);
 855	atomic_add(swqe_av, &pr->swqe_avail);
 856
 857	if (unlikely(netif_tx_queue_stopped(txq) &&
 858		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 859		__netif_tx_lock(txq, smp_processor_id());
 860		if (netif_tx_queue_stopped(txq) &&
 861		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 862			netif_tx_wake_queue(txq);
 863		__netif_tx_unlock(txq);
 864	}
 865
 866	wake_up(&pr->port->swqe_avail_wq);
 867
 868	return cqe;
 869}
 870
 871#define EHEA_POLL_MAX_CQES 65535
 872
 873static int ehea_poll(struct napi_struct *napi, int budget)
 874{
 875	struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 876						napi);
 877	struct net_device *dev = pr->port->netdev;
 878	struct ehea_cqe *cqe;
 879	struct ehea_cqe *cqe_skb = NULL;
 880	int wqe_index;
 881	int rx = 0;
 882
 883	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 884	rx += ehea_proc_rwqes(dev, pr, budget - rx);
 885
 886	while (rx != budget) {
 887		napi_complete(napi);
 888		ehea_reset_cq_ep(pr->recv_cq);
 889		ehea_reset_cq_ep(pr->send_cq);
 890		ehea_reset_cq_n1(pr->recv_cq);
 891		ehea_reset_cq_n1(pr->send_cq);
 892		rmb();
 893		cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 894		cqe_skb = ehea_poll_cq(pr->send_cq);
 895
 896		if (!cqe && !cqe_skb)
 897			return rx;
 898
 899		if (!napi_reschedule(napi))
 900			return rx;
 901
 902		cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 903		rx += ehea_proc_rwqes(dev, pr, budget - rx);
 904	}
 905
 906	return rx;
 907}
 908
 909static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 910{
 911	struct ehea_port_res *pr = param;
 912
 913	napi_schedule(&pr->napi);
 914
 915	return IRQ_HANDLED;
 916}
 917
 918static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 919{
 920	struct ehea_port *port = param;
 921	struct ehea_eqe *eqe;
 922	struct ehea_qp *qp;
 923	u32 qp_token;
 924	u64 resource_type, aer, aerr;
 925	int reset_port = 0;
 926
 927	eqe = ehea_poll_eq(port->qp_eq);
 928
 929	while (eqe) {
 930		qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 931		pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 932		       eqe->entry, qp_token);
 933
 934		qp = port->port_res[qp_token].qp;
 935
 936		resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 937						&aer, &aerr);
 938
 939		if (resource_type == EHEA_AER_RESTYPE_QP) {
 940			if ((aer & EHEA_AER_RESET_MASK) ||
 941			    (aerr & EHEA_AERR_RESET_MASK))
 942				 reset_port = 1;
 943		} else
 944			reset_port = 1;   /* Reset in case of CQ or EQ error */
 945
 946		eqe = ehea_poll_eq(port->qp_eq);
 947	}
 948
 949	if (reset_port) {
 950		pr_err("Resetting port\n");
 951		ehea_schedule_port_reset(port);
 952	}
 953
 954	return IRQ_HANDLED;
 955}
 956
 957static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 958				       int logical_port)
 959{
 960	int i;
 961
 962	for (i = 0; i < EHEA_MAX_PORTS; i++)
 963		if (adapter->port[i])
 964			if (adapter->port[i]->logical_port_id == logical_port)
 965				return adapter->port[i];
 966	return NULL;
 967}
 968
 969int ehea_sense_port_attr(struct ehea_port *port)
 970{
 971	int ret;
 972	u64 hret;
 973	struct hcp_ehea_port_cb0 *cb0;
 974
 975	/* may be called via ehea_neq_tasklet() */
 976	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 977	if (!cb0) {
 978		pr_err("no mem for cb0\n");
 979		ret = -ENOMEM;
 980		goto out;
 981	}
 982
 983	hret = ehea_h_query_ehea_port(port->adapter->handle,
 984				      port->logical_port_id, H_PORT_CB0,
 985				      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 986				      cb0);
 987	if (hret != H_SUCCESS) {
 988		ret = -EIO;
 989		goto out_free;
 990	}
 991
 992	/* MAC address */
 993	port->mac_addr = cb0->port_mac_addr << 16;
 994
 995	if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
 996		ret = -EADDRNOTAVAIL;
 997		goto out_free;
 998	}
 999
1000	/* Port speed */
1001	switch (cb0->port_speed) {
1002	case H_SPEED_10M_H:
1003		port->port_speed = EHEA_SPEED_10M;
1004		port->full_duplex = 0;
1005		break;
1006	case H_SPEED_10M_F:
1007		port->port_speed = EHEA_SPEED_10M;
1008		port->full_duplex = 1;
1009		break;
1010	case H_SPEED_100M_H:
1011		port->port_speed = EHEA_SPEED_100M;
1012		port->full_duplex = 0;
1013		break;
1014	case H_SPEED_100M_F:
1015		port->port_speed = EHEA_SPEED_100M;
1016		port->full_duplex = 1;
1017		break;
1018	case H_SPEED_1G_F:
1019		port->port_speed = EHEA_SPEED_1G;
1020		port->full_duplex = 1;
1021		break;
1022	case H_SPEED_10G_F:
1023		port->port_speed = EHEA_SPEED_10G;
1024		port->full_duplex = 1;
1025		break;
1026	default:
1027		port->port_speed = 0;
1028		port->full_duplex = 0;
1029		break;
1030	}
1031
1032	port->autoneg = 1;
1033	port->num_mcs = cb0->num_default_qps;
1034
1035	/* Number of default QPs */
1036	if (use_mcs)
1037		port->num_def_qps = cb0->num_default_qps;
1038	else
1039		port->num_def_qps = 1;
1040
1041	if (!port->num_def_qps) {
1042		ret = -EINVAL;
1043		goto out_free;
1044	}
1045
1046	ret = 0;
1047out_free:
1048	if (ret || netif_msg_probe(port))
1049		ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1050	free_page((unsigned long)cb0);
1051out:
1052	return ret;
1053}
1054
1055int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1056{
1057	struct hcp_ehea_port_cb4 *cb4;
1058	u64 hret;
1059	int ret = 0;
1060
1061	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1062	if (!cb4) {
1063		pr_err("no mem for cb4\n");
1064		ret = -ENOMEM;
1065		goto out;
1066	}
1067
1068	cb4->port_speed = port_speed;
1069
1070	netif_carrier_off(port->netdev);
1071
1072	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1073				       port->logical_port_id,
1074				       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1075	if (hret == H_SUCCESS) {
1076		port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1077
1078		hret = ehea_h_query_ehea_port(port->adapter->handle,
1079					      port->logical_port_id,
1080					      H_PORT_CB4, H_PORT_CB4_SPEED,
1081					      cb4);
1082		if (hret == H_SUCCESS) {
1083			switch (cb4->port_speed) {
1084			case H_SPEED_10M_H:
1085				port->port_speed = EHEA_SPEED_10M;
1086				port->full_duplex = 0;
1087				break;
1088			case H_SPEED_10M_F:
1089				port->port_speed = EHEA_SPEED_10M;
1090				port->full_duplex = 1;
1091				break;
1092			case H_SPEED_100M_H:
1093				port->port_speed = EHEA_SPEED_100M;
1094				port->full_duplex = 0;
1095				break;
1096			case H_SPEED_100M_F:
1097				port->port_speed = EHEA_SPEED_100M;
1098				port->full_duplex = 1;
1099				break;
1100			case H_SPEED_1G_F:
1101				port->port_speed = EHEA_SPEED_1G;
1102				port->full_duplex = 1;
1103				break;
1104			case H_SPEED_10G_F:
1105				port->port_speed = EHEA_SPEED_10G;
1106				port->full_duplex = 1;
1107				break;
1108			default:
1109				port->port_speed = 0;
1110				port->full_duplex = 0;
1111				break;
1112			}
1113		} else {
1114			pr_err("Failed sensing port speed\n");
1115			ret = -EIO;
1116		}
1117	} else {
1118		if (hret == H_AUTHORITY) {
1119			pr_info("Hypervisor denied setting port speed\n");
1120			ret = -EPERM;
1121		} else {
1122			ret = -EIO;
1123			pr_err("Failed setting port speed\n");
1124		}
1125	}
1126	if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1127		netif_carrier_on(port->netdev);
1128
1129	free_page((unsigned long)cb4);
1130out:
1131	return ret;
1132}
1133
1134static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1135{
1136	int ret;
1137	u8 ec;
1138	u8 portnum;
1139	struct ehea_port *port;
1140	struct net_device *dev;
1141
1142	ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1143	portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1144	port = ehea_get_port(adapter, portnum);
1145	if (!port) {
1146		netdev_err(NULL, "unknown portnum %x\n", portnum);
1147		return;
1148	}
1149	dev = port->netdev;
1150
1151	switch (ec) {
1152	case EHEA_EC_PORTSTATE_CHG:	/* port state change */
1153
1154		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1155			if (!netif_carrier_ok(dev)) {
1156				ret = ehea_sense_port_attr(port);
1157				if (ret) {
1158					netdev_err(dev, "failed resensing port attributes\n");
1159					break;
1160				}
1161
1162				netif_info(port, link, dev,
1163					   "Logical port up: %dMbps %s Duplex\n",
1164					   port->port_speed,
1165					   port->full_duplex == 1 ?
1166					   "Full" : "Half");
1167
1168				netif_carrier_on(dev);
1169				netif_wake_queue(dev);
1170			}
1171		} else
1172			if (netif_carrier_ok(dev)) {
1173				netif_info(port, link, dev,
1174					   "Logical port down\n");
1175				netif_carrier_off(dev);
1176				netif_tx_disable(dev);
1177			}
1178
1179		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1180			port->phy_link = EHEA_PHY_LINK_UP;
1181			netif_info(port, link, dev,
1182				   "Physical port up\n");
1183			if (prop_carrier_state)
1184				netif_carrier_on(dev);
1185		} else {
1186			port->phy_link = EHEA_PHY_LINK_DOWN;
1187			netif_info(port, link, dev,
1188				   "Physical port down\n");
1189			if (prop_carrier_state)
1190				netif_carrier_off(dev);
1191		}
1192
1193		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1194			netdev_info(dev,
1195				    "External switch port is primary port\n");
1196		else
1197			netdev_info(dev,
1198				    "External switch port is backup port\n");
1199
1200		break;
1201	case EHEA_EC_ADAPTER_MALFUNC:
1202		netdev_err(dev, "Adapter malfunction\n");
1203		break;
1204	case EHEA_EC_PORT_MALFUNC:
1205		netdev_info(dev, "Port malfunction\n");
1206		netif_carrier_off(dev);
1207		netif_tx_disable(dev);
1208		break;
1209	default:
1210		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1211		break;
1212	}
1213}
1214
1215static void ehea_neq_tasklet(unsigned long data)
1216{
1217	struct ehea_adapter *adapter = (struct ehea_adapter *)data;
1218	struct ehea_eqe *eqe;
1219	u64 event_mask;
1220
1221	eqe = ehea_poll_eq(adapter->neq);
1222	pr_debug("eqe=%p\n", eqe);
1223
1224	while (eqe) {
1225		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1226		ehea_parse_eqe(adapter, eqe->entry);
1227		eqe = ehea_poll_eq(adapter->neq);
1228		pr_debug("next eqe=%p\n", eqe);
1229	}
1230
1231	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1232		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1233		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1234
1235	ehea_h_reset_events(adapter->handle,
1236			    adapter->neq->fw_handle, event_mask);
1237}
1238
1239static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1240{
1241	struct ehea_adapter *adapter = param;
1242	tasklet_hi_schedule(&adapter->neq_tasklet);
1243	return IRQ_HANDLED;
1244}
1245
1246
1247static int ehea_fill_port_res(struct ehea_port_res *pr)
1248{
1249	int ret;
1250	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1251
1252	ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1253
1254	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1255
1256	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1257
1258	return ret;
1259}
1260
1261static int ehea_reg_interrupts(struct net_device *dev)
1262{
1263	struct ehea_port *port = netdev_priv(dev);
1264	struct ehea_port_res *pr;
1265	int i, ret;
1266
1267
1268	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1269		 dev->name);
1270
1271	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1272				  ehea_qp_aff_irq_handler,
1273				  0, port->int_aff_name, port);
1274	if (ret) {
1275		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1276			   port->qp_eq->attr.ist1);
1277		goto out_free_qpeq;
1278	}
1279
1280	netif_info(port, ifup, dev,
1281		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1282		   port->qp_eq->attr.ist1);
1283
1284
1285	for (i = 0; i < port->num_def_qps; i++) {
1286		pr = &port->port_res[i];
1287		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1288			 "%s-queue%d", dev->name, i);
1289		ret = ibmebus_request_irq(pr->eq->attr.ist1,
1290					  ehea_recv_irq_handler,
1291					  0, pr->int_send_name, pr);
1292		if (ret) {
1293			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1294				   i, pr->eq->attr.ist1);
1295			goto out_free_req;
1296		}
1297		netif_info(port, ifup, dev,
1298			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1299			   pr->eq->attr.ist1, i);
1300	}
1301out:
1302	return ret;
1303
1304
1305out_free_req:
1306	while (--i >= 0) {
1307		u32 ist = port->port_res[i].eq->attr.ist1;
1308		ibmebus_free_irq(ist, &port->port_res[i]);
1309	}
1310
1311out_free_qpeq:
1312	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1313	i = port->num_def_qps;
1314
1315	goto out;
1316
1317}
1318
1319static void ehea_free_interrupts(struct net_device *dev)
1320{
1321	struct ehea_port *port = netdev_priv(dev);
1322	struct ehea_port_res *pr;
1323	int i;
1324
1325	/* send */
1326
1327	for (i = 0; i < port->num_def_qps; i++) {
1328		pr = &port->port_res[i];
1329		ibmebus_free_irq(pr->eq->attr.ist1, pr);
1330		netif_info(port, intr, dev,
1331			   "free send irq for res %d with handle 0x%X\n",
1332			   i, pr->eq->attr.ist1);
1333	}
1334
1335	/* associated events */
1336	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1337	netif_info(port, intr, dev,
1338		   "associated event interrupt for handle 0x%X freed\n",
1339		   port->qp_eq->attr.ist1);
1340}
1341
1342static int ehea_configure_port(struct ehea_port *port)
1343{
1344	int ret, i;
1345	u64 hret, mask;
1346	struct hcp_ehea_port_cb0 *cb0;
1347
1348	ret = -ENOMEM;
1349	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1350	if (!cb0)
1351		goto out;
1352
1353	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1354		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1355		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1356		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1357		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1358				      PXLY_RC_VLAN_FILTER)
1359		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1360
1361	for (i = 0; i < port->num_mcs; i++)
1362		if (use_mcs)
1363			cb0->default_qpn_arr[i] =
1364				port->port_res[i].qp->init_attr.qp_nr;
1365		else
1366			cb0->default_qpn_arr[i] =
1367				port->port_res[0].qp->init_attr.qp_nr;
1368
1369	if (netif_msg_ifup(port))
1370		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1371
1372	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1373	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1374
1375	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1376				       port->logical_port_id,
1377				       H_PORT_CB0, mask, cb0);
1378	ret = -EIO;
1379	if (hret != H_SUCCESS)
1380		goto out_free;
1381
1382	ret = 0;
1383
1384out_free:
1385	free_page((unsigned long)cb0);
1386out:
1387	return ret;
1388}
1389
1390static int ehea_gen_smrs(struct ehea_port_res *pr)
1391{
1392	int ret;
1393	struct ehea_adapter *adapter = pr->port->adapter;
1394
1395	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1396	if (ret)
1397		goto out;
1398
1399	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1400	if (ret)
1401		goto out_free;
1402
1403	return 0;
1404
1405out_free:
1406	ehea_rem_mr(&pr->send_mr);
1407out:
1408	pr_err("Generating SMRS failed\n");
1409	return -EIO;
1410}
1411
1412static int ehea_rem_smrs(struct ehea_port_res *pr)
1413{
1414	if ((ehea_rem_mr(&pr->send_mr)) ||
1415	    (ehea_rem_mr(&pr->recv_mr)))
1416		return -EIO;
1417	else
1418		return 0;
1419}
1420
1421static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1422{
1423	int arr_size = sizeof(void *) * max_q_entries;
1424
1425	q_skba->arr = vzalloc(arr_size);
1426	if (!q_skba->arr)
1427		return -ENOMEM;
1428
1429	q_skba->len = max_q_entries;
1430	q_skba->index = 0;
1431	q_skba->os_skbs = 0;
1432
1433	return 0;
1434}
1435
1436static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1437			      struct port_res_cfg *pr_cfg, int queue_token)
1438{
1439	struct ehea_adapter *adapter = port->adapter;
1440	enum ehea_eq_type eq_type = EHEA_EQ;
1441	struct ehea_qp_init_attr *init_attr = NULL;
1442	int ret = -EIO;
1443	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1444
1445	tx_bytes = pr->tx_bytes;
1446	tx_packets = pr->tx_packets;
1447	rx_bytes = pr->rx_bytes;
1448	rx_packets = pr->rx_packets;
1449
1450	memset(pr, 0, sizeof(struct ehea_port_res));
1451
1452	pr->tx_bytes = tx_bytes;
1453	pr->tx_packets = tx_packets;
1454	pr->rx_bytes = rx_bytes;
1455	pr->rx_packets = rx_packets;
1456
1457	pr->port = port;
1458
1459	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1460	if (!pr->eq) {
1461		pr_err("create_eq failed (eq)\n");
1462		goto out_free;
1463	}
1464
1465	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1466				     pr->eq->fw_handle,
1467				     port->logical_port_id);
1468	if (!pr->recv_cq) {
1469		pr_err("create_cq failed (cq_recv)\n");
1470		goto out_free;
1471	}
1472
1473	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1474				     pr->eq->fw_handle,
1475				     port->logical_port_id);
1476	if (!pr->send_cq) {
1477		pr_err("create_cq failed (cq_send)\n");
1478		goto out_free;
1479	}
1480
1481	if (netif_msg_ifup(port))
1482		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1483			pr->send_cq->attr.act_nr_of_cqes,
1484			pr->recv_cq->attr.act_nr_of_cqes);
1485
1486	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1487	if (!init_attr) {
1488		ret = -ENOMEM;
1489		pr_err("no mem for ehea_qp_init_attr\n");
1490		goto out_free;
1491	}
1492
1493	init_attr->low_lat_rq1 = 1;
1494	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */
1495	init_attr->rq_count = 3;
1496	init_attr->qp_token = queue_token;
1497	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1498	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1499	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1500	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1501	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1502	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1503	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1504	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1505	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1506	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1507	init_attr->port_nr = port->logical_port_id;
1508	init_attr->send_cq_handle = pr->send_cq->fw_handle;
1509	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1510	init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1511
1512	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1513	if (!pr->qp) {
1514		pr_err("create_qp failed\n");
1515		ret = -EIO;
1516		goto out_free;
1517	}
1518
1519	if (netif_msg_ifup(port))
1520		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",
1521			init_attr->qp_nr,
1522			init_attr->act_nr_send_wqes,
1523			init_attr->act_nr_rwqes_rq1,
1524			init_attr->act_nr_rwqes_rq2,
1525			init_attr->act_nr_rwqes_rq3);
1526
1527	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1528
1529	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1530	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1531	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1532	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1533	if (ret)
1534		goto out_free;
1535
1536	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1537	if (ehea_gen_smrs(pr) != 0) {
1538		ret = -EIO;
1539		goto out_free;
1540	}
1541
1542	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1543
1544	kfree(init_attr);
1545
1546	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
1547
1548	ret = 0;
1549	goto out;
1550
1551out_free:
1552	kfree(init_attr);
1553	vfree(pr->sq_skba.arr);
1554	vfree(pr->rq1_skba.arr);
1555	vfree(pr->rq2_skba.arr);
1556	vfree(pr->rq3_skba.arr);
1557	ehea_destroy_qp(pr->qp);
1558	ehea_destroy_cq(pr->send_cq);
1559	ehea_destroy_cq(pr->recv_cq);
1560	ehea_destroy_eq(pr->eq);
1561out:
1562	return ret;
1563}
1564
1565static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1566{
1567	int ret, i;
1568
1569	if (pr->qp)
1570		netif_napi_del(&pr->napi);
1571
1572	ret = ehea_destroy_qp(pr->qp);
1573
1574	if (!ret) {
1575		ehea_destroy_cq(pr->send_cq);
1576		ehea_destroy_cq(pr->recv_cq);
1577		ehea_destroy_eq(pr->eq);
1578
1579		for (i = 0; i < pr->rq1_skba.len; i++)
1580			dev_kfree_skb(pr->rq1_skba.arr[i]);
1581
1582		for (i = 0; i < pr->rq2_skba.len; i++)
1583			dev_kfree_skb(pr->rq2_skba.arr[i]);
1584
1585		for (i = 0; i < pr->rq3_skba.len; i++)
1586			dev_kfree_skb(pr->rq3_skba.arr[i]);
1587
1588		for (i = 0; i < pr->sq_skba.len; i++)
1589			dev_kfree_skb(pr->sq_skba.arr[i]);
1590
1591		vfree(pr->rq1_skba.arr);
1592		vfree(pr->rq2_skba.arr);
1593		vfree(pr->rq3_skba.arr);
1594		vfree(pr->sq_skba.arr);
1595		ret = ehea_rem_smrs(pr);
1596	}
1597	return ret;
1598}
1599
1600static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1601				  u32 lkey)
1602{
1603	int skb_data_size = skb_headlen(skb);
1604	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1605	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1606	unsigned int immediate_len = SWQE2_MAX_IMM;
1607
1608	swqe->descriptors = 0;
1609
1610	if (skb_is_gso(skb)) {
1611		swqe->tx_control |= EHEA_SWQE_TSO;
1612		swqe->mss = skb_shinfo(skb)->gso_size;
1613		/*
1614		 * For TSO packets we only copy the headers into the
1615		 * immediate area.
1616		 */
1617		immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
1618	}
1619
1620	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1621		skb_copy_from_linear_data(skb, imm_data, immediate_len);
1622		swqe->immediate_data_length = immediate_len;
1623
1624		if (skb_data_size > immediate_len) {
1625			sg1entry->l_key = lkey;
1626			sg1entry->len = skb_data_size - immediate_len;
1627			sg1entry->vaddr =
1628				ehea_map_vaddr(skb->data + immediate_len);
1629			swqe->descriptors++;
1630		}
1631	} else {
1632		skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1633		swqe->immediate_data_length = skb_data_size;
1634	}
1635}
1636
1637static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1638				    struct ehea_swqe *swqe, u32 lkey)
1639{
1640	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1641	skb_frag_t *frag;
1642	int nfrags, sg1entry_contains_frag_data, i;
1643
1644	nfrags = skb_shinfo(skb)->nr_frags;
1645	sg1entry = &swqe->u.immdata_desc.sg_entry;
1646	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1647	sg1entry_contains_frag_data = 0;
1648
1649	write_swqe2_immediate(skb, swqe, lkey);
1650
1651	/* write descriptors */
1652	if (nfrags > 0) {
1653		if (swqe->descriptors == 0) {
1654			/* sg1entry not yet used */
1655			frag = &skb_shinfo(skb)->frags[0];
1656
1657			/* copy sg1entry data */
1658			sg1entry->l_key = lkey;
1659			sg1entry->len = skb_frag_size(frag);
1660			sg1entry->vaddr =
1661				ehea_map_vaddr(skb_frag_address(frag));
1662			swqe->descriptors++;
1663			sg1entry_contains_frag_data = 1;
1664		}
1665
1666		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1667
1668			frag = &skb_shinfo(skb)->frags[i];
1669			sgentry = &sg_list[i - sg1entry_contains_frag_data];
1670
1671			sgentry->l_key = lkey;
1672			sgentry->len = skb_frag_size(frag);
1673			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1674			swqe->descriptors++;
1675		}
1676	}
1677}
1678
1679static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1680{
1681	int ret = 0;
1682	u64 hret;
1683	u8 reg_type;
1684
1685	/* De/Register untagged packets */
1686	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1687	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1688				     port->logical_port_id,
1689				     reg_type, port->mac_addr, 0, hcallid);
1690	if (hret != H_SUCCESS) {
1691		pr_err("%sregistering bc address failed (tagged)\n",
1692		       hcallid == H_REG_BCMC ? "" : "de");
1693		ret = -EIO;
1694		goto out_herr;
1695	}
1696
1697	/* De/Register VLAN packets */
1698	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1699	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1700				     port->logical_port_id,
1701				     reg_type, port->mac_addr, 0, hcallid);
1702	if (hret != H_SUCCESS) {
1703		pr_err("%sregistering bc address failed (vlan)\n",
1704		       hcallid == H_REG_BCMC ? "" : "de");
1705		ret = -EIO;
1706	}
1707out_herr:
1708	return ret;
1709}
1710
1711static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1712{
1713	struct ehea_port *port = netdev_priv(dev);
1714	struct sockaddr *mac_addr = sa;
1715	struct hcp_ehea_port_cb0 *cb0;
1716	int ret;
1717	u64 hret;
1718
1719	if (!is_valid_ether_addr(mac_addr->sa_data)) {
1720		ret = -EADDRNOTAVAIL;
1721		goto out;
1722	}
1723
1724	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1725	if (!cb0) {
1726		pr_err("no mem for cb0\n");
1727		ret = -ENOMEM;
1728		goto out;
1729	}
1730
1731	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1732
1733	cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1734
1735	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1736				       port->logical_port_id, H_PORT_CB0,
1737				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1738	if (hret != H_SUCCESS) {
1739		ret = -EIO;
1740		goto out_free;
1741	}
1742
1743	memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len);
1744
1745	/* Deregister old MAC in pHYP */
1746	if (port->state == EHEA_PORT_UP) {
1747		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1748		if (ret)
1749			goto out_upregs;
1750	}
1751
1752	port->mac_addr = cb0->port_mac_addr << 16;
1753
1754	/* Register new MAC in pHYP */
1755	if (port->state == EHEA_PORT_UP) {
1756		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1757		if (ret)
1758			goto out_upregs;
1759	}
1760
1761	ret = 0;
1762
1763out_upregs:
1764	ehea_update_bcmc_registrations();
1765out_free:
1766	free_page((unsigned long)cb0);
1767out:
1768	return ret;
1769}
1770
1771static void ehea_promiscuous_error(u64 hret, int enable)
1772{
1773	if (hret == H_AUTHORITY)
1774		pr_info("Hypervisor denied %sabling promiscuous mode\n",
1775			enable == 1 ? "en" : "dis");
1776	else
1777		pr_err("failed %sabling promiscuous mode\n",
1778		       enable == 1 ? "en" : "dis");
1779}
1780
1781static void ehea_promiscuous(struct net_device *dev, int enable)
1782{
1783	struct ehea_port *port = netdev_priv(dev);
1784	struct hcp_ehea_port_cb7 *cb7;
1785	u64 hret;
1786
1787	if (enable == port->promisc)
1788		return;
1789
1790	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1791	if (!cb7) {
1792		pr_err("no mem for cb7\n");
1793		goto out;
1794	}
1795
1796	/* Modify Pxs_DUCQPN in CB7 */
1797	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1798
1799	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1800				       port->logical_port_id,
1801				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1802	if (hret) {
1803		ehea_promiscuous_error(hret, enable);
1804		goto out;
1805	}
1806
1807	port->promisc = enable;
1808out:
1809	free_page((unsigned long)cb7);
1810}
1811
1812static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1813				     u32 hcallid)
1814{
1815	u64 hret;
1816	u8 reg_type;
1817
1818	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1819	if (mc_mac_addr == 0)
1820		reg_type |= EHEA_BCMC_SCOPE_ALL;
1821
1822	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1823				     port->logical_port_id,
1824				     reg_type, mc_mac_addr, 0, hcallid);
1825	if (hret)
1826		goto out;
1827
1828	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1829	if (mc_mac_addr == 0)
1830		reg_type |= EHEA_BCMC_SCOPE_ALL;
1831
1832	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1833				     port->logical_port_id,
1834				     reg_type, mc_mac_addr, 0, hcallid);
1835out:
1836	return hret;
1837}
1838
1839static int ehea_drop_multicast_list(struct net_device *dev)
1840{
1841	struct ehea_port *port = netdev_priv(dev);
1842	struct ehea_mc_list *mc_entry = port->mc_list;
1843	struct list_head *pos;
1844	struct list_head *temp;
1845	int ret = 0;
1846	u64 hret;
1847
1848	list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1849		mc_entry = list_entry(pos, struct ehea_mc_list, list);
1850
1851		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1852						 H_DEREG_BCMC);
1853		if (hret) {
1854			pr_err("failed deregistering mcast MAC\n");
1855			ret = -EIO;
1856		}
1857
1858		list_del(pos);
1859		kfree(mc_entry);
1860	}
1861	return ret;
1862}
1863
1864static void ehea_allmulti(struct net_device *dev, int enable)
1865{
1866	struct ehea_port *port = netdev_priv(dev);
1867	u64 hret;
1868
1869	if (!port->allmulti) {
1870		if (enable) {
1871			/* Enable ALLMULTI */
1872			ehea_drop_multicast_list(dev);
1873			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1874			if (!hret)
1875				port->allmulti = 1;
1876			else
1877				netdev_err(dev,
1878					   "failed enabling IFF_ALLMULTI\n");
1879		}
1880	} else {
1881		if (!enable) {
1882			/* Disable ALLMULTI */
1883			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1884			if (!hret)
1885				port->allmulti = 0;
1886			else
1887				netdev_err(dev,
1888					   "failed disabling IFF_ALLMULTI\n");
1889		}
1890	}
1891}
1892
1893static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1894{
1895	struct ehea_mc_list *ehea_mcl_entry;
1896	u64 hret;
1897
1898	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1899	if (!ehea_mcl_entry)
1900		return;
1901
1902	INIT_LIST_HEAD(&ehea_mcl_entry->list);
1903
1904	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1905
1906	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1907					 H_REG_BCMC);
1908	if (!hret)
1909		list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1910	else {
1911		pr_err("failed registering mcast MAC\n");
1912		kfree(ehea_mcl_entry);
1913	}
1914}
1915
1916static void ehea_set_multicast_list(struct net_device *dev)
1917{
1918	struct ehea_port *port = netdev_priv(dev);
1919	struct netdev_hw_addr *ha;
1920	int ret;
1921
1922	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1923
1924	if (dev->flags & IFF_ALLMULTI) {
1925		ehea_allmulti(dev, 1);
1926		goto out;
1927	}
1928	ehea_allmulti(dev, 0);
1929
1930	if (!netdev_mc_empty(dev)) {
1931		ret = ehea_drop_multicast_list(dev);
1932		if (ret) {
1933			/* Dropping the current multicast list failed.
1934			 * Enabling ALL_MULTI is the best we can do.
1935			 */
1936			ehea_allmulti(dev, 1);
1937		}
1938
1939		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1940			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1941				port->adapter->max_mc_mac);
1942			goto out;
1943		}
1944
1945		netdev_for_each_mc_addr(ha, dev)
1946			ehea_add_multicast_entry(port, ha->addr);
1947
1948	}
1949out:
1950	ehea_update_bcmc_registrations();
1951}
1952
1953static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1954{
1955	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1956
1957	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1958		return;
1959
1960	if (skb->ip_summed == CHECKSUM_PARTIAL)
1961		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1962
1963	swqe->ip_start = skb_network_offset(skb);
1964	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1965
1966	switch (ip_hdr(skb)->protocol) {
1967	case IPPROTO_UDP:
1968		if (skb->ip_summed == CHECKSUM_PARTIAL)
1969			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1970
1971		swqe->tcp_offset = swqe->ip_end + 1 +
1972				   offsetof(struct udphdr, check);
1973		break;
1974
1975	case IPPROTO_TCP:
1976		if (skb->ip_summed == CHECKSUM_PARTIAL)
1977			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1978
1979		swqe->tcp_offset = swqe->ip_end + 1 +
1980				   offsetof(struct tcphdr, check);
1981		break;
1982	}
1983}
1984
1985static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1986		       struct ehea_swqe *swqe, u32 lkey)
1987{
1988	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1989
1990	xmit_common(skb, swqe);
1991
1992	write_swqe2_data(skb, dev, swqe, lkey);
1993}
1994
1995static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
1996		       struct ehea_swqe *swqe)
1997{
1998	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
1999
2000	xmit_common(skb, swqe);
2001
2002	if (!skb->data_len)
2003		skb_copy_from_linear_data(skb, imm_data, skb->len);
2004	else
2005		skb_copy_bits(skb, 0, imm_data, skb->len);
2006
2007	swqe->immediate_data_length = skb->len;
2008	dev_consume_skb_any(skb);
2009}
2010
2011static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2012{
2013	struct ehea_port *port = netdev_priv(dev);
2014	struct ehea_swqe *swqe;
2015	u32 lkey;
2016	int swqe_index;
2017	struct ehea_port_res *pr;
2018	struct netdev_queue *txq;
2019
2020	pr = &port->port_res[skb_get_queue_mapping(skb)];
2021	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2022
2023	swqe = ehea_get_swqe(pr->qp, &swqe_index);
2024	memset(swqe, 0, SWQE_HEADER_SIZE);
2025	atomic_dec(&pr->swqe_avail);
2026
2027	if (skb_vlan_tag_present(skb)) {
2028		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2029		swqe->vlan_tag = skb_vlan_tag_get(skb);
2030	}
2031
2032	pr->tx_packets++;
2033	pr->tx_bytes += skb->len;
2034
2035	if (skb->len <= SWQE3_MAX_IMM) {
2036		u32 sig_iv = port->sig_comp_iv;
2037		u32 swqe_num = pr->swqe_id_counter;
2038		ehea_xmit3(skb, dev, swqe);
2039		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2040			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2041		if (pr->swqe_ll_count >= (sig_iv - 1)) {
2042			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2043						      sig_iv);
2044			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2045			pr->swqe_ll_count = 0;
2046		} else
2047			pr->swqe_ll_count += 1;
2048	} else {
2049		swqe->wr_id =
2050			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2051		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2052		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2053		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2054		pr->sq_skba.arr[pr->sq_skba.index] = skb;
2055
2056		pr->sq_skba.index++;
2057		pr->sq_skba.index &= (pr->sq_skba.len - 1);
2058
2059		lkey = pr->send_mr.lkey;
2060		ehea_xmit2(skb, dev, swqe, lkey);
2061		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2062	}
2063	pr->swqe_id_counter += 1;
2064
2065	netif_info(port, tx_queued, dev,
2066		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2067	if (netif_msg_tx_queued(port))
2068		ehea_dump(swqe, 512, "swqe");
2069
2070	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2071		netif_tx_stop_queue(txq);
2072		swqe->tx_control |= EHEA_SWQE_PURGE;
2073	}
2074
2075	ehea_post_swqe(pr->qp, swqe);
2076
2077	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2078		pr->p_stats.queue_stopped++;
2079		netif_tx_stop_queue(txq);
2080	}
2081
2082	return NETDEV_TX_OK;
2083}
2084
2085static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2086{
2087	struct ehea_port *port = netdev_priv(dev);
2088	struct ehea_adapter *adapter = port->adapter;
2089	struct hcp_ehea_port_cb1 *cb1;
2090	int index;
2091	u64 hret;
2092	int err = 0;
2093
2094	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2095	if (!cb1) {
2096		pr_err("no mem for cb1\n");
2097		err = -ENOMEM;
2098		goto out;
2099	}
2100
2101	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2102				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2103	if (hret != H_SUCCESS) {
2104		pr_err("query_ehea_port failed\n");
2105		err = -EINVAL;
2106		goto out;
2107	}
2108
2109	index = (vid / 64);
2110	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2111
2112	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2113				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2114	if (hret != H_SUCCESS) {
2115		pr_err("modify_ehea_port failed\n");
2116		err = -EINVAL;
2117	}
2118out:
2119	free_page((unsigned long)cb1);
2120	return err;
2121}
2122
2123static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2124{
2125	struct ehea_port *port = netdev_priv(dev);
2126	struct ehea_adapter *adapter = port->adapter;
2127	struct hcp_ehea_port_cb1 *cb1;
2128	int index;
2129	u64 hret;
2130	int err = 0;
2131
2132	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2133	if (!cb1) {
2134		pr_err("no mem for cb1\n");
2135		err = -ENOMEM;
2136		goto out;
2137	}
2138
2139	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2140				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2141	if (hret != H_SUCCESS) {
2142		pr_err("query_ehea_port failed\n");
2143		err = -EINVAL;
2144		goto out;
2145	}
2146
2147	index = (vid / 64);
2148	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2149
2150	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2151				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2152	if (hret != H_SUCCESS) {
2153		pr_err("modify_ehea_port failed\n");
2154		err = -EINVAL;
2155	}
2156out:
2157	free_page((unsigned long)cb1);
2158	return err;
2159}
2160
2161static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2162{
2163	int ret = -EIO;
2164	u64 hret;
2165	u16 dummy16 = 0;
2166	u64 dummy64 = 0;
2167	struct hcp_modify_qp_cb0 *cb0;
2168
2169	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2170	if (!cb0) {
2171		ret = -ENOMEM;
2172		goto out;
2173	}
2174
2175	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2176				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2177	if (hret != H_SUCCESS) {
2178		pr_err("query_ehea_qp failed (1)\n");
2179		goto out;
2180	}
2181
2182	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2183	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2184				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2185				     &dummy64, &dummy64, &dummy16, &dummy16);
2186	if (hret != H_SUCCESS) {
2187		pr_err("modify_ehea_qp failed (1)\n");
2188		goto out;
2189	}
2190
2191	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2192				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2193	if (hret != H_SUCCESS) {
2194		pr_err("query_ehea_qp failed (2)\n");
2195		goto out;
2196	}
2197
2198	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2199	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2200				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2201				     &dummy64, &dummy64, &dummy16, &dummy16);
2202	if (hret != H_SUCCESS) {
2203		pr_err("modify_ehea_qp failed (2)\n");
2204		goto out;
2205	}
2206
2207	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2208				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2209	if (hret != H_SUCCESS) {
2210		pr_err("query_ehea_qp failed (3)\n");
2211		goto out;
2212	}
2213
2214	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2215	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2216				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2217				     &dummy64, &dummy64, &dummy16, &dummy16);
2218	if (hret != H_SUCCESS) {
2219		pr_err("modify_ehea_qp failed (3)\n");
2220		goto out;
2221	}
2222
2223	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2224				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2225	if (hret != H_SUCCESS) {
2226		pr_err("query_ehea_qp failed (4)\n");
2227		goto out;
2228	}
2229
2230	ret = 0;
2231out:
2232	free_page((unsigned long)cb0);
2233	return ret;
2234}
2235
2236static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2237{
2238	int ret, i;
2239	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2240	enum ehea_eq_type eq_type = EHEA_EQ;
2241
2242	port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2243				   EHEA_MAX_ENTRIES_EQ, 1);
2244	if (!port->qp_eq) {
2245		ret = -EINVAL;
2246		pr_err("ehea_create_eq failed (qp_eq)\n");
2247		goto out_kill_eq;
2248	}
2249
2250	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2251	pr_cfg.max_entries_scq = sq_entries * 2;
2252	pr_cfg.max_entries_sq = sq_entries;
2253	pr_cfg.max_entries_rq1 = rq1_entries;
2254	pr_cfg.max_entries_rq2 = rq2_entries;
2255	pr_cfg.max_entries_rq3 = rq3_entries;
2256
2257	pr_cfg_small_rx.max_entries_rcq = 1;
2258	pr_cfg_small_rx.max_entries_scq = sq_entries;
2259	pr_cfg_small_rx.max_entries_sq = sq_entries;
2260	pr_cfg_small_rx.max_entries_rq1 = 1;
2261	pr_cfg_small_rx.max_entries_rq2 = 1;
2262	pr_cfg_small_rx.max_entries_rq3 = 1;
2263
2264	for (i = 0; i < def_qps; i++) {
2265		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2266		if (ret)
2267			goto out_clean_pr;
2268	}
2269	for (i = def_qps; i < def_qps; i++) {
2270		ret = ehea_init_port_res(port, &port->port_res[i],
2271					 &pr_cfg_small_rx, i);
2272		if (ret)
2273			goto out_clean_pr;
2274	}
2275
2276	return 0;
2277
2278out_clean_pr:
2279	while (--i >= 0)
2280		ehea_clean_portres(port, &port->port_res[i]);
2281
2282out_kill_eq:
2283	ehea_destroy_eq(port->qp_eq);
2284	return ret;
2285}
2286
2287static int ehea_clean_all_portres(struct ehea_port *port)
2288{
2289	int ret = 0;
2290	int i;
2291
2292	for (i = 0; i < port->num_def_qps; i++)
2293		ret |= ehea_clean_portres(port, &port->port_res[i]);
2294
2295	ret |= ehea_destroy_eq(port->qp_eq);
2296
2297	return ret;
2298}
2299
2300static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2301{
2302	if (adapter->active_ports)
2303		return;
2304
2305	ehea_rem_mr(&adapter->mr);
2306}
2307
2308static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2309{
2310	if (adapter->active_ports)
2311		return 0;
2312
2313	return ehea_reg_kernel_mr(adapter, &adapter->mr);
2314}
2315
2316static int ehea_up(struct net_device *dev)
2317{
2318	int ret, i;
2319	struct ehea_port *port = netdev_priv(dev);
2320
2321	if (port->state == EHEA_PORT_UP)
2322		return 0;
2323
2324	ret = ehea_port_res_setup(port, port->num_def_qps);
2325	if (ret) {
2326		netdev_err(dev, "port_res_failed\n");
2327		goto out;
2328	}
2329
2330	/* Set default QP for this port */
2331	ret = ehea_configure_port(port);
2332	if (ret) {
2333		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2334		goto out_clean_pr;
2335	}
2336
2337	ret = ehea_reg_interrupts(dev);
2338	if (ret) {
2339		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2340		goto out_clean_pr;
2341	}
2342
2343	for (i = 0; i < port->num_def_qps; i++) {
2344		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2345		if (ret) {
2346			netdev_err(dev, "activate_qp failed\n");
2347			goto out_free_irqs;
2348		}
2349	}
2350
2351	for (i = 0; i < port->num_def_qps; i++) {
2352		ret = ehea_fill_port_res(&port->port_res[i]);
2353		if (ret) {
2354			netdev_err(dev, "out_free_irqs\n");
2355			goto out_free_irqs;
2356		}
2357	}
2358
2359	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2360	if (ret) {
2361		ret = -EIO;
2362		goto out_free_irqs;
2363	}
2364
2365	port->state = EHEA_PORT_UP;
2366
2367	ret = 0;
2368	goto out;
2369
2370out_free_irqs:
2371	ehea_free_interrupts(dev);
2372
2373out_clean_pr:
2374	ehea_clean_all_portres(port);
2375out:
2376	if (ret)
2377		netdev_info(dev, "Failed starting. ret=%i\n", ret);
2378
2379	ehea_update_bcmc_registrations();
2380	ehea_update_firmware_handles();
2381
2382	return ret;
2383}
2384
2385static void port_napi_disable(struct ehea_port *port)
2386{
2387	int i;
2388
2389	for (i = 0; i < port->num_def_qps; i++)
2390		napi_disable(&port->port_res[i].napi);
2391}
2392
2393static void port_napi_enable(struct ehea_port *port)
2394{
2395	int i;
2396
2397	for (i = 0; i < port->num_def_qps; i++)
2398		napi_enable(&port->port_res[i].napi);
2399}
2400
2401static int ehea_open(struct net_device *dev)
2402{
2403	int ret;
2404	struct ehea_port *port = netdev_priv(dev);
2405
2406	mutex_lock(&port->port_lock);
2407
2408	netif_info(port, ifup, dev, "enabling port\n");
2409
2410	netif_carrier_off(dev);
2411
2412	ret = ehea_up(dev);
2413	if (!ret) {
2414		port_napi_enable(port);
2415		netif_tx_start_all_queues(dev);
2416	}
2417
2418	mutex_unlock(&port->port_lock);
2419	schedule_delayed_work(&port->stats_work,
2420			      round_jiffies_relative(msecs_to_jiffies(1000)));
2421
2422	return ret;
2423}
2424
2425static int ehea_down(struct net_device *dev)
2426{
2427	int ret;
2428	struct ehea_port *port = netdev_priv(dev);
2429
2430	if (port->state == EHEA_PORT_DOWN)
2431		return 0;
2432
2433	ehea_drop_multicast_list(dev);
2434	ehea_allmulti(dev, 0);
2435	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2436
2437	ehea_free_interrupts(dev);
2438
2439	port->state = EHEA_PORT_DOWN;
2440
2441	ehea_update_bcmc_registrations();
2442
2443	ret = ehea_clean_all_portres(port);
2444	if (ret)
2445		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2446
2447	ehea_update_firmware_handles();
2448
2449	return ret;
2450}
2451
2452static int ehea_stop(struct net_device *dev)
2453{
2454	int ret;
2455	struct ehea_port *port = netdev_priv(dev);
2456
2457	netif_info(port, ifdown, dev, "disabling port\n");
2458
2459	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2460	cancel_work_sync(&port->reset_task);
2461	cancel_delayed_work_sync(&port->stats_work);
2462	mutex_lock(&port->port_lock);
2463	netif_tx_stop_all_queues(dev);
2464	port_napi_disable(port);
2465	ret = ehea_down(dev);
2466	mutex_unlock(&port->port_lock);
2467	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2468	return ret;
2469}
2470
2471static void ehea_purge_sq(struct ehea_qp *orig_qp)
2472{
2473	struct ehea_qp qp = *orig_qp;
2474	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2475	struct ehea_swqe *swqe;
2476	int wqe_index;
2477	int i;
2478
2479	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2480		swqe = ehea_get_swqe(&qp, &wqe_index);
2481		swqe->tx_control |= EHEA_SWQE_PURGE;
2482	}
2483}
2484
2485static void ehea_flush_sq(struct ehea_port *port)
2486{
2487	int i;
2488
2489	for (i = 0; i < port->num_def_qps; i++) {
2490		struct ehea_port_res *pr = &port->port_res[i];
2491		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2492		int ret;
2493
2494		ret = wait_event_timeout(port->swqe_avail_wq,
2495			 atomic_read(&pr->swqe_avail) >= swqe_max,
2496			 msecs_to_jiffies(100));
2497
2498		if (!ret) {
2499			pr_err("WARNING: sq not flushed completely\n");
2500			break;
2501		}
2502	}
2503}
2504
2505static int ehea_stop_qps(struct net_device *dev)
2506{
2507	struct ehea_port *port = netdev_priv(dev);
2508	struct ehea_adapter *adapter = port->adapter;
2509	struct hcp_modify_qp_cb0 *cb0;
2510	int ret = -EIO;
2511	int dret;
2512	int i;
2513	u64 hret;
2514	u64 dummy64 = 0;
2515	u16 dummy16 = 0;
2516
2517	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2518	if (!cb0) {
2519		ret = -ENOMEM;
2520		goto out;
2521	}
2522
2523	for (i = 0; i < (port->num_def_qps); i++) {
2524		struct ehea_port_res *pr =  &port->port_res[i];
2525		struct ehea_qp *qp = pr->qp;
2526
2527		/* Purge send queue */
2528		ehea_purge_sq(qp);
2529
2530		/* Disable queue pair */
2531		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2532					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2533					    cb0);
2534		if (hret != H_SUCCESS) {
2535			pr_err("query_ehea_qp failed (1)\n");
2536			goto out;
2537		}
2538
2539		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2540		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2541
2542		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2543					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2544							    1), cb0, &dummy64,
2545					     &dummy64, &dummy16, &dummy16);
2546		if (hret != H_SUCCESS) {
2547			pr_err("modify_ehea_qp failed (1)\n");
2548			goto out;
2549		}
2550
2551		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2552					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2553					    cb0);
2554		if (hret != H_SUCCESS) {
2555			pr_err("query_ehea_qp failed (2)\n");
2556			goto out;
2557		}
2558
2559		/* deregister shared memory regions */
2560		dret = ehea_rem_smrs(pr);
2561		if (dret) {
2562			pr_err("unreg shared memory region failed\n");
2563			goto out;
2564		}
2565	}
2566
2567	ret = 0;
2568out:
2569	free_page((unsigned long)cb0);
2570
2571	return ret;
2572}
2573
2574static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2575{
2576	struct ehea_qp qp = *orig_qp;
2577	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2578	struct ehea_rwqe *rwqe;
2579	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2580	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2581	struct sk_buff *skb;
2582	u32 lkey = pr->recv_mr.lkey;
2583
2584
2585	int i;
2586	int index;
2587
2588	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2589		rwqe = ehea_get_next_rwqe(&qp, 2);
2590		rwqe->sg_list[0].l_key = lkey;
2591		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2592		skb = skba_rq2[index];
2593		if (skb)
2594			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2595	}
2596
2597	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2598		rwqe = ehea_get_next_rwqe(&qp, 3);
2599		rwqe->sg_list[0].l_key = lkey;
2600		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2601		skb = skba_rq3[index];
2602		if (skb)
2603			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2604	}
2605}
2606
2607static int ehea_restart_qps(struct net_device *dev)
2608{
2609	struct ehea_port *port = netdev_priv(dev);
2610	struct ehea_adapter *adapter = port->adapter;
2611	int ret = 0;
2612	int i;
2613
2614	struct hcp_modify_qp_cb0 *cb0;
2615	u64 hret;
2616	u64 dummy64 = 0;
2617	u16 dummy16 = 0;
2618
2619	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2620	if (!cb0) {
2621		ret = -ENOMEM;
2622		goto out;
2623	}
2624
2625	for (i = 0; i < (port->num_def_qps); i++) {
2626		struct ehea_port_res *pr =  &port->port_res[i];
2627		struct ehea_qp *qp = pr->qp;
2628
2629		ret = ehea_gen_smrs(pr);
2630		if (ret) {
2631			netdev_err(dev, "creation of shared memory regions failed\n");
2632			goto out;
2633		}
2634
2635		ehea_update_rqs(qp, pr);
2636
2637		/* Enable queue pair */
2638		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2639					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2640					    cb0);
2641		if (hret != H_SUCCESS) {
2642			netdev_err(dev, "query_ehea_qp failed (1)\n");
2643			goto out;
2644		}
2645
2646		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2647		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2648
2649		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2650					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2651							    1), cb0, &dummy64,
2652					     &dummy64, &dummy16, &dummy16);
2653		if (hret != H_SUCCESS) {
2654			netdev_err(dev, "modify_ehea_qp failed (1)\n");
2655			goto out;
2656		}
2657
2658		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2659					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2660					    cb0);
2661		if (hret != H_SUCCESS) {
2662			netdev_err(dev, "query_ehea_qp failed (2)\n");
2663			goto out;
2664		}
2665
2666		/* refill entire queue */
2667		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2668		ehea_refill_rq2(pr, 0);
2669		ehea_refill_rq3(pr, 0);
2670	}
2671out:
2672	free_page((unsigned long)cb0);
2673
2674	return ret;
2675}
2676
2677static void ehea_reset_port(struct work_struct *work)
2678{
2679	int ret;
2680	struct ehea_port *port =
2681		container_of(work, struct ehea_port, reset_task);
2682	struct net_device *dev = port->netdev;
2683
2684	mutex_lock(&dlpar_mem_lock);
2685	port->resets++;
2686	mutex_lock(&port->port_lock);
2687	netif_tx_disable(dev);
2688
2689	port_napi_disable(port);
2690
2691	ehea_down(dev);
2692
2693	ret = ehea_up(dev);
2694	if (ret)
2695		goto out;
2696
2697	ehea_set_multicast_list(dev);
2698
2699	netif_info(port, timer, dev, "reset successful\n");
2700
2701	port_napi_enable(port);
2702
2703	netif_tx_wake_all_queues(dev);
2704out:
2705	mutex_unlock(&port->port_lock);
2706	mutex_unlock(&dlpar_mem_lock);
2707}
2708
2709static void ehea_rereg_mrs(void)
2710{
2711	int ret, i;
2712	struct ehea_adapter *adapter;
2713
2714	pr_info("LPAR memory changed - re-initializing driver\n");
2715
2716	list_for_each_entry(adapter, &adapter_list, list)
2717		if (adapter->active_ports) {
2718			/* Shutdown all ports */
2719			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2720				struct ehea_port *port = adapter->port[i];
2721				struct net_device *dev;
2722
2723				if (!port)
2724					continue;
2725
2726				dev = port->netdev;
2727
2728				if (dev->flags & IFF_UP) {
2729					mutex_lock(&port->port_lock);
2730					netif_tx_disable(dev);
2731					ehea_flush_sq(port);
2732					ret = ehea_stop_qps(dev);
2733					if (ret) {
2734						mutex_unlock(&port->port_lock);
2735						goto out;
2736					}
2737					port_napi_disable(port);
2738					mutex_unlock(&port->port_lock);
2739				}
2740				reset_sq_restart_flag(port);
2741			}
2742
2743			/* Unregister old memory region */
2744			ret = ehea_rem_mr(&adapter->mr);
2745			if (ret) {
2746				pr_err("unregister MR failed - driver inoperable!\n");
2747				goto out;
2748			}
2749		}
2750
2751	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2752
2753	list_for_each_entry(adapter, &adapter_list, list)
2754		if (adapter->active_ports) {
2755			/* Register new memory region */
2756			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2757			if (ret) {
2758				pr_err("register MR failed - driver inoperable!\n");
2759				goto out;
2760			}
2761
2762			/* Restart all ports */
2763			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2764				struct ehea_port *port = adapter->port[i];
2765
2766				if (port) {
2767					struct net_device *dev = port->netdev;
2768
2769					if (dev->flags & IFF_UP) {
2770						mutex_lock(&port->port_lock);
2771						ret = ehea_restart_qps(dev);
2772						if (!ret) {
2773							check_sqs(port);
2774							port_napi_enable(port);
2775							netif_tx_wake_all_queues(dev);
2776						} else {
2777							netdev_err(dev, "Unable to restart QPS\n");
2778						}
2779						mutex_unlock(&port->port_lock);
2780					}
2781				}
2782			}
2783		}
2784	pr_info("re-initializing driver complete\n");
2785out:
2786	return;
2787}
2788
2789static void ehea_tx_watchdog(struct net_device *dev)
2790{
2791	struct ehea_port *port = netdev_priv(dev);
2792
2793	if (netif_carrier_ok(dev) &&
2794	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2795		ehea_schedule_port_reset(port);
2796}
2797
2798static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2799{
2800	struct hcp_query_ehea *cb;
2801	u64 hret;
2802	int ret;
2803
2804	cb = (void *)get_zeroed_page(GFP_KERNEL);
2805	if (!cb) {
2806		ret = -ENOMEM;
2807		goto out;
2808	}
2809
2810	hret = ehea_h_query_ehea(adapter->handle, cb);
2811
2812	if (hret != H_SUCCESS) {
2813		ret = -EIO;
2814		goto out_herr;
2815	}
2816
2817	adapter->max_mc_mac = cb->max_mc_mac - 1;
2818	ret = 0;
2819
2820out_herr:
2821	free_page((unsigned long)cb);
2822out:
2823	return ret;
2824}
2825
2826static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2827{
2828	struct hcp_ehea_port_cb4 *cb4;
2829	u64 hret;
2830	int ret = 0;
2831
2832	*jumbo = 0;
2833
2834	/* (Try to) enable *jumbo frames */
2835	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2836	if (!cb4) {
2837		pr_err("no mem for cb4\n");
2838		ret = -ENOMEM;
2839		goto out;
2840	} else {
2841		hret = ehea_h_query_ehea_port(port->adapter->handle,
2842					      port->logical_port_id,
2843					      H_PORT_CB4,
2844					      H_PORT_CB4_JUMBO, cb4);
2845		if (hret == H_SUCCESS) {
2846			if (cb4->jumbo_frame)
2847				*jumbo = 1;
2848			else {
2849				cb4->jumbo_frame = 1;
2850				hret = ehea_h_modify_ehea_port(port->adapter->
2851							       handle,
2852							       port->
2853							       logical_port_id,
2854							       H_PORT_CB4,
2855							       H_PORT_CB4_JUMBO,
2856							       cb4);
2857				if (hret == H_SUCCESS)
2858					*jumbo = 1;
2859			}
2860		} else
2861			ret = -EINVAL;
2862
2863		free_page((unsigned long)cb4);
2864	}
2865out:
2866	return ret;
2867}
2868
2869static ssize_t ehea_show_port_id(struct device *dev,
2870				 struct device_attribute *attr, char *buf)
2871{
2872	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2873	return sprintf(buf, "%d", port->logical_port_id);
2874}
2875
2876static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL);
2877
2878static void logical_port_release(struct device *dev)
2879{
2880	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2881	of_node_put(port->ofdev.dev.of_node);
2882}
2883
2884static struct device *ehea_register_port(struct ehea_port *port,
2885					 struct device_node *dn)
2886{
2887	int ret;
2888
2889	port->ofdev.dev.of_node = of_node_get(dn);
2890	port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2891	port->ofdev.dev.bus = &ibmebus_bus_type;
2892
2893	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2894	port->ofdev.dev.release = logical_port_release;
2895
2896	ret = of_device_register(&port->ofdev);
2897	if (ret) {
2898		pr_err("failed to register device. ret=%d\n", ret);
2899		goto out;
2900	}
2901
2902	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2903	if (ret) {
2904		pr_err("failed to register attributes, ret=%d\n", ret);
2905		goto out_unreg_of_dev;
2906	}
2907
2908	return &port->ofdev.dev;
2909
2910out_unreg_of_dev:
2911	of_device_unregister(&port->ofdev);
2912out:
2913	return NULL;
2914}
2915
2916static void ehea_unregister_port(struct ehea_port *port)
2917{
2918	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2919	of_device_unregister(&port->ofdev);
2920}
2921
2922static const struct net_device_ops ehea_netdev_ops = {
2923	.ndo_open		= ehea_open,
2924	.ndo_stop		= ehea_stop,
2925	.ndo_start_xmit		= ehea_start_xmit,
2926	.ndo_get_stats64	= ehea_get_stats64,
2927	.ndo_set_mac_address	= ehea_set_mac_addr,
2928	.ndo_validate_addr	= eth_validate_addr,
2929	.ndo_set_rx_mode	= ehea_set_multicast_list,
2930	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,
2931	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,
2932	.ndo_tx_timeout		= ehea_tx_watchdog,
2933};
2934
2935static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2936					 u32 logical_port_id,
2937					 struct device_node *dn)
2938{
2939	int ret;
2940	struct net_device *dev;
2941	struct ehea_port *port;
2942	struct device *port_dev;
2943	int jumbo;
2944
2945	/* allocate memory for the port structures */
2946	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2947
2948	if (!dev) {
2949		ret = -ENOMEM;
2950		goto out_err;
2951	}
2952
2953	port = netdev_priv(dev);
2954
2955	mutex_init(&port->port_lock);
2956	port->state = EHEA_PORT_DOWN;
2957	port->sig_comp_iv = sq_entries / 10;
2958
2959	port->adapter = adapter;
2960	port->netdev = dev;
2961	port->logical_port_id = logical_port_id;
2962
2963	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2964
2965	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2966	if (!port->mc_list) {
2967		ret = -ENOMEM;
2968		goto out_free_ethdev;
2969	}
2970
2971	INIT_LIST_HEAD(&port->mc_list->list);
2972
2973	ret = ehea_sense_port_attr(port);
2974	if (ret)
2975		goto out_free_mc_list;
2976
2977	netif_set_real_num_rx_queues(dev, port->num_def_qps);
2978	netif_set_real_num_tx_queues(dev, port->num_def_qps);
2979
2980	port_dev = ehea_register_port(port, dn);
2981	if (!port_dev)
2982		goto out_free_mc_list;
2983
2984	SET_NETDEV_DEV(dev, port_dev);
2985
2986	/* initialize net_device structure */
2987	memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN);
2988
2989	dev->netdev_ops = &ehea_netdev_ops;
2990	ehea_set_ethtool_ops(dev);
2991
2992	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2993		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
2994	dev->features = NETIF_F_SG | NETIF_F_TSO |
2995		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
2996		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2997		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
2998	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
2999			NETIF_F_IP_CSUM;
3000	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3001
3002	/* MTU range: 68 - 9022 */
3003	dev->min_mtu = ETH_MIN_MTU;
3004	dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3005
3006	INIT_WORK(&port->reset_task, ehea_reset_port);
3007	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3008
3009	init_waitqueue_head(&port->swqe_avail_wq);
3010	init_waitqueue_head(&port->restart_wq);
3011
3012	ret = register_netdev(dev);
3013	if (ret) {
3014		pr_err("register_netdev failed. ret=%d\n", ret);
3015		goto out_unreg_port;
3016	}
3017
3018	ret = ehea_get_jumboframe_status(port, &jumbo);
3019	if (ret)
3020		netdev_err(dev, "failed determining jumbo frame status\n");
3021
3022	netdev_info(dev, "Jumbo frames are %sabled\n",
3023		    jumbo == 1 ? "en" : "dis");
3024
3025	adapter->active_ports++;
3026
3027	return port;
3028
3029out_unreg_port:
3030	ehea_unregister_port(port);
3031
3032out_free_mc_list:
3033	kfree(port->mc_list);
3034
3035out_free_ethdev:
3036	free_netdev(dev);
3037
3038out_err:
3039	pr_err("setting up logical port with id=%d failed, ret=%d\n",
3040	       logical_port_id, ret);
3041	return NULL;
3042}
3043
3044static void ehea_shutdown_single_port(struct ehea_port *port)
3045{
3046	struct ehea_adapter *adapter = port->adapter;
3047
3048	cancel_work_sync(&port->reset_task);
3049	cancel_delayed_work_sync(&port->stats_work);
3050	unregister_netdev(port->netdev);
3051	ehea_unregister_port(port);
3052	kfree(port->mc_list);
3053	free_netdev(port->netdev);
3054	adapter->active_ports--;
3055}
3056
3057static int ehea_setup_ports(struct ehea_adapter *adapter)
3058{
3059	struct device_node *lhea_dn;
3060	struct device_node *eth_dn = NULL;
3061
3062	const u32 *dn_log_port_id;
3063	int i = 0;
3064
3065	lhea_dn = adapter->ofdev->dev.of_node;
3066	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3067
3068		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3069						 NULL);
3070		if (!dn_log_port_id) {
3071			pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
3072			continue;
3073		}
3074
3075		if (ehea_add_adapter_mr(adapter)) {
3076			pr_err("creating MR failed\n");
3077			of_node_put(eth_dn);
3078			return -EIO;
3079		}
3080
3081		adapter->port[i] = ehea_setup_single_port(adapter,
3082							  *dn_log_port_id,
3083							  eth_dn);
3084		if (adapter->port[i])
3085			netdev_info(adapter->port[i]->netdev,
3086				    "logical port id #%d\n", *dn_log_port_id);
3087		else
3088			ehea_remove_adapter_mr(adapter);
3089
3090		i++;
3091	}
3092	return 0;
3093}
3094
3095static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3096					   u32 logical_port_id)
3097{
3098	struct device_node *lhea_dn;
3099	struct device_node *eth_dn = NULL;
3100	const u32 *dn_log_port_id;
3101
3102	lhea_dn = adapter->ofdev->dev.of_node;
3103	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3104
3105		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3106						 NULL);
3107		if (dn_log_port_id)
3108			if (*dn_log_port_id == logical_port_id)
3109				return eth_dn;
3110	}
3111
3112	return NULL;
3113}
3114
3115static ssize_t ehea_probe_port(struct device *dev,
3116			       struct device_attribute *attr,
3117			       const char *buf, size_t count)
3118{
3119	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3120	struct ehea_port *port;
3121	struct device_node *eth_dn = NULL;
3122	int i;
3123
3124	u32 logical_port_id;
3125
3126	sscanf(buf, "%d", &logical_port_id);
3127
3128	port = ehea_get_port(adapter, logical_port_id);
3129
3130	if (port) {
3131		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3132			    logical_port_id);
3133		return -EINVAL;
3134	}
3135
3136	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3137
3138	if (!eth_dn) {
3139		pr_info("no logical port with id %d found\n", logical_port_id);
3140		return -EINVAL;
3141	}
3142
3143	if (ehea_add_adapter_mr(adapter)) {
3144		pr_err("creating MR failed\n");
3145		of_node_put(eth_dn);
3146		return -EIO;
3147	}
3148
3149	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3150
3151	of_node_put(eth_dn);
3152
3153	if (port) {
3154		for (i = 0; i < EHEA_MAX_PORTS; i++)
3155			if (!adapter->port[i]) {
3156				adapter->port[i] = port;
3157				break;
3158			}
3159
3160		netdev_info(port->netdev, "added: (logical port id=%d)\n",
3161			    logical_port_id);
3162	} else {
3163		ehea_remove_adapter_mr(adapter);
3164		return -EIO;
3165	}
3166
3167	return (ssize_t) count;
3168}
3169
3170static ssize_t ehea_remove_port(struct device *dev,
3171				struct device_attribute *attr,
3172				const char *buf, size_t count)
3173{
3174	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3175	struct ehea_port *port;
3176	int i;
3177	u32 logical_port_id;
3178
3179	sscanf(buf, "%d", &logical_port_id);
3180
3181	port = ehea_get_port(adapter, logical_port_id);
3182
3183	if (port) {
3184		netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3185			    logical_port_id);
3186
3187		ehea_shutdown_single_port(port);
3188
3189		for (i = 0; i < EHEA_MAX_PORTS; i++)
3190			if (adapter->port[i] == port) {
3191				adapter->port[i] = NULL;
3192				break;
3193			}
3194	} else {
3195		pr_err("removing port with logical port id=%d failed. port not configured.\n",
3196		       logical_port_id);
3197		return -EINVAL;
3198	}
3199
3200	ehea_remove_adapter_mr(adapter);
3201
3202	return (ssize_t) count;
3203}
3204
3205static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port);
3206static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port);
3207
3208static int ehea_create_device_sysfs(struct platform_device *dev)
3209{
3210	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3211	if (ret)
3212		goto out;
3213
3214	ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3215out:
3216	return ret;
3217}
3218
3219static void ehea_remove_device_sysfs(struct platform_device *dev)
3220{
3221	device_remove_file(&dev->dev, &dev_attr_probe_port);
3222	device_remove_file(&dev->dev, &dev_attr_remove_port);
3223}
3224
3225static int ehea_reboot_notifier(struct notifier_block *nb,
3226				unsigned long action, void *unused)
3227{
3228	if (action == SYS_RESTART) {
3229		pr_info("Reboot: freeing all eHEA resources\n");
3230		ibmebus_unregister_driver(&ehea_driver);
3231	}
3232	return NOTIFY_DONE;
3233}
3234
3235static struct notifier_block ehea_reboot_nb = {
3236	.notifier_call = ehea_reboot_notifier,
3237};
3238
3239static int ehea_mem_notifier(struct notifier_block *nb,
3240			     unsigned long action, void *data)
3241{
3242	int ret = NOTIFY_BAD;
3243	struct memory_notify *arg = data;
3244
3245	mutex_lock(&dlpar_mem_lock);
3246
3247	switch (action) {
3248	case MEM_CANCEL_OFFLINE:
3249		pr_info("memory offlining canceled");
3250		/* Fall through - re-add canceled memory block */
3251
3252	case MEM_ONLINE:
3253		pr_info("memory is going online");
3254		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3255		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3256			goto out_unlock;
3257		ehea_rereg_mrs();
3258		break;
3259
3260	case MEM_GOING_OFFLINE:
3261		pr_info("memory is going offline");
3262		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3263		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3264			goto out_unlock;
3265		ehea_rereg_mrs();
3266		break;
3267
3268	default:
3269		break;
3270	}
3271
3272	ehea_update_firmware_handles();
3273	ret = NOTIFY_OK;
3274
3275out_unlock:
3276	mutex_unlock(&dlpar_mem_lock);
3277	return ret;
3278}
3279
3280static struct notifier_block ehea_mem_nb = {
3281	.notifier_call = ehea_mem_notifier,
3282};
3283
3284static void ehea_crash_handler(void)
3285{
3286	int i;
3287
3288	if (ehea_fw_handles.arr)
3289		for (i = 0; i < ehea_fw_handles.num_entries; i++)
3290			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3291					     ehea_fw_handles.arr[i].fwh,
3292					     FORCE_FREE);
3293
3294	if (ehea_bcmc_regs.arr)
3295		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3296			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3297					      ehea_bcmc_regs.arr[i].port_id,
3298					      ehea_bcmc_regs.arr[i].reg_type,
3299					      ehea_bcmc_regs.arr[i].macaddr,
3300					      0, H_DEREG_BCMC);
3301}
3302
3303static atomic_t ehea_memory_hooks_registered;
3304
3305/* Register memory hooks on probe of first adapter */
3306static int ehea_register_memory_hooks(void)
3307{
3308	int ret = 0;
3309
3310	if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3311		return 0;
3312
3313	ret = ehea_create_busmap();
3314	if (ret) {
3315		pr_info("ehea_create_busmap failed\n");
3316		goto out;
3317	}
3318
3319	ret = register_reboot_notifier(&ehea_reboot_nb);
3320	if (ret) {
3321		pr_info("register_reboot_notifier failed\n");
3322		goto out;
3323	}
3324
3325	ret = register_memory_notifier(&ehea_mem_nb);
3326	if (ret) {
3327		pr_info("register_memory_notifier failed\n");
3328		goto out2;
3329	}
3330
3331	ret = crash_shutdown_register(ehea_crash_handler);
3332	if (ret) {
3333		pr_info("crash_shutdown_register failed\n");
3334		goto out3;
3335	}
3336
3337	return 0;
3338
3339out3:
3340	unregister_memory_notifier(&ehea_mem_nb);
3341out2:
3342	unregister_reboot_notifier(&ehea_reboot_nb);
3343out:
3344	atomic_dec(&ehea_memory_hooks_registered);
3345	return ret;
3346}
3347
3348static void ehea_unregister_memory_hooks(void)
3349{
3350	/* Only remove the hooks if we've registered them */
3351	if (atomic_read(&ehea_memory_hooks_registered) == 0)
3352		return;
3353
3354	unregister_reboot_notifier(&ehea_reboot_nb);
3355	if (crash_shutdown_unregister(ehea_crash_handler))
3356		pr_info("failed unregistering crash handler\n");
3357	unregister_memory_notifier(&ehea_mem_nb);
3358}
3359
3360static int ehea_probe_adapter(struct platform_device *dev)
3361{
3362	struct ehea_adapter *adapter;
3363	const u64 *adapter_handle;
3364	int ret;
3365	int i;
3366
3367	ret = ehea_register_memory_hooks();
3368	if (ret)
3369		return ret;
3370
3371	if (!dev || !dev->dev.of_node) {
3372		pr_err("Invalid ibmebus device probed\n");
3373		return -EINVAL;
3374	}
3375
3376	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3377	if (!adapter) {
3378		ret = -ENOMEM;
3379		dev_err(&dev->dev, "no mem for ehea_adapter\n");
3380		goto out;
3381	}
3382
3383	list_add(&adapter->list, &adapter_list);
3384
3385	adapter->ofdev = dev;
3386
3387	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3388					 NULL);
3389	if (adapter_handle)
3390		adapter->handle = *adapter_handle;
3391
3392	if (!adapter->handle) {
3393		dev_err(&dev->dev, "failed getting handle for adapter"
3394			" '%pOF'\n", dev->dev.of_node);
3395		ret = -ENODEV;
3396		goto out_free_ad;
3397	}
3398
3399	adapter->pd = EHEA_PD_ID;
3400
3401	platform_set_drvdata(dev, adapter);
3402
3403
3404	/* initialize adapter and ports */
3405	/* get adapter properties */
3406	ret = ehea_sense_adapter_attr(adapter);
3407	if (ret) {
3408		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3409		goto out_free_ad;
3410	}
3411
3412	adapter->neq = ehea_create_eq(adapter,
3413				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3414	if (!adapter->neq) {
3415		ret = -EIO;
3416		dev_err(&dev->dev, "NEQ creation failed\n");
3417		goto out_free_ad;
3418	}
3419
3420	tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet,
3421		     (unsigned long)adapter);
3422
3423	ret = ehea_create_device_sysfs(dev);
3424	if (ret)
3425		goto out_kill_eq;
3426
3427	ret = ehea_setup_ports(adapter);
3428	if (ret) {
3429		dev_err(&dev->dev, "setup_ports failed\n");
3430		goto out_rem_dev_sysfs;
3431	}
3432
3433	ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3434				  ehea_interrupt_neq, 0,
3435				  "ehea_neq", adapter);
3436	if (ret) {
3437		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3438		goto out_shutdown_ports;
3439	}
3440
3441	/* Handle any events that might be pending. */
3442	tasklet_hi_schedule(&adapter->neq_tasklet);
3443
3444	ret = 0;
3445	goto out;
3446
3447out_shutdown_ports:
3448	for (i = 0; i < EHEA_MAX_PORTS; i++)
3449		if (adapter->port[i]) {
3450			ehea_shutdown_single_port(adapter->port[i]);
3451			adapter->port[i] = NULL;
3452		}
3453
3454out_rem_dev_sysfs:
3455	ehea_remove_device_sysfs(dev);
3456
3457out_kill_eq:
3458	ehea_destroy_eq(adapter->neq);
3459
3460out_free_ad:
3461	list_del(&adapter->list);
3462
3463out:
3464	ehea_update_firmware_handles();
3465
3466	return ret;
3467}
3468
3469static int ehea_remove(struct platform_device *dev)
3470{
3471	struct ehea_adapter *adapter = platform_get_drvdata(dev);
3472	int i;
3473
3474	for (i = 0; i < EHEA_MAX_PORTS; i++)
3475		if (adapter->port[i]) {
3476			ehea_shutdown_single_port(adapter->port[i]);
3477			adapter->port[i] = NULL;
3478		}
3479
3480	ehea_remove_device_sysfs(dev);
3481
3482	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3483	tasklet_kill(&adapter->neq_tasklet);
3484
3485	ehea_destroy_eq(adapter->neq);
3486	ehea_remove_adapter_mr(adapter);
3487	list_del(&adapter->list);
3488
3489	ehea_update_firmware_handles();
3490
3491	return 0;
3492}
3493
3494static int check_module_parm(void)
3495{
3496	int ret = 0;
3497
3498	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3499	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3500		pr_info("Bad parameter: rq1_entries\n");
3501		ret = -EINVAL;
3502	}
3503	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3504	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3505		pr_info("Bad parameter: rq2_entries\n");
3506		ret = -EINVAL;
3507	}
3508	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3509	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3510		pr_info("Bad parameter: rq3_entries\n");
3511		ret = -EINVAL;
3512	}
3513	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3514	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3515		pr_info("Bad parameter: sq_entries\n");
3516		ret = -EINVAL;
3517	}
3518
3519	return ret;
3520}
3521
3522static ssize_t capabilities_show(struct device_driver *drv, char *buf)
3523{
3524	return sprintf(buf, "%d", EHEA_CAPABILITIES);
3525}
3526
3527static DRIVER_ATTR_RO(capabilities);
3528
3529static int __init ehea_module_init(void)
3530{
3531	int ret;
3532
3533	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3534
3535	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3536	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3537
3538	mutex_init(&ehea_fw_handles.lock);
3539	spin_lock_init(&ehea_bcmc_regs.lock);
3540
3541	ret = check_module_parm();
3542	if (ret)
3543		goto out;
3544
3545	ret = ibmebus_register_driver(&ehea_driver);
3546	if (ret) {
3547		pr_err("failed registering eHEA device driver on ebus\n");
3548		goto out;
3549	}
3550
3551	ret = driver_create_file(&ehea_driver.driver,
3552				 &driver_attr_capabilities);
3553	if (ret) {
3554		pr_err("failed to register capabilities attribute, ret=%d\n",
3555		       ret);
3556		goto out2;
3557	}
3558
3559	return ret;
3560
3561out2:
3562	ibmebus_unregister_driver(&ehea_driver);
3563out:
3564	return ret;
3565}
3566
3567static void __exit ehea_module_exit(void)
3568{
3569	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3570	ibmebus_unregister_driver(&ehea_driver);
3571	ehea_unregister_memory_hooks();
3572	kfree(ehea_fw_handles.arr);
3573	kfree(ehea_bcmc_regs.arr);
3574	ehea_destroy_busmap();
3575}
3576
3577module_init(ehea_module_init);
3578module_exit(ehea_module_exit);