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#include <linux/of.h>
  33#include <linux/of_device.h>
  34#include <linux/platform_device.h>
  35
  36#include <net/ip.h>
  37
  38#include "ehea.h"
  39#include "ehea_qmr.h"
  40#include "ehea_phyp.h"
  41
  42
  43MODULE_LICENSE("GPL");
  44MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
  45MODULE_DESCRIPTION("IBM eServer HEA Driver");
  46MODULE_VERSION(DRV_VERSION);
  47
  48
  49static int msg_level = -1;
  50static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
  51static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
  52static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
  53static int sq_entries = EHEA_DEF_ENTRIES_SQ;
  54static int use_mcs = 1;
  55static int prop_carrier_state;
  56
  57module_param(msg_level, int, 0);
  58module_param(rq1_entries, int, 0);
  59module_param(rq2_entries, int, 0);
  60module_param(rq3_entries, int, 0);
  61module_param(sq_entries, int, 0);
  62module_param(prop_carrier_state, int, 0);
  63module_param(use_mcs, int, 0);
  64
  65MODULE_PARM_DESC(msg_level, "msg_level");
  66MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
  67		 "port to stack. 1:yes, 0:no.  Default = 0 ");
  68MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 "
  69		 "[2^x - 1], x = [7..14]. Default = "
  70		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")");
  71MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 "
  72		 "[2^x - 1], x = [7..14]. Default = "
  73		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")");
  74MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
  75		 "[2^x - 1], x = [7..14]. Default = "
  76		 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")");
  77MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
  78		 "[2^x - 1], x = [7..14]. Default = "
  79		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
  80MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
  81		 "Default = 1");
  82
  83static int port_name_cnt;
  84static LIST_HEAD(adapter_list);
  85static unsigned long ehea_driver_flags;
  86static DEFINE_MUTEX(dlpar_mem_lock);
  87static struct ehea_fw_handle_array ehea_fw_handles;
  88static struct ehea_bcmc_reg_array ehea_bcmc_regs;
  89
  90
  91static int ehea_probe_adapter(struct platform_device *dev);
  92
  93static void ehea_remove(struct platform_device *dev);
  94
  95static const struct of_device_id ehea_module_device_table[] = {
  96	{
  97		.name = "lhea",
  98		.compatible = "IBM,lhea",
  99	},
 100	{
 101		.type = "network",
 102		.compatible = "IBM,lhea-ethernet",
 103	},
 104	{},
 105};
 106MODULE_DEVICE_TABLE(of, ehea_module_device_table);
 107
 108static const struct of_device_id ehea_device_table[] = {
 109	{
 110		.name = "lhea",
 111		.compatible = "IBM,lhea",
 112	},
 113	{},
 114};
 115MODULE_DEVICE_TABLE(of, ehea_device_table);
 116
 117static struct platform_driver ehea_driver = {
 118	.driver = {
 119		.name = "ehea",
 120		.owner = THIS_MODULE,
 121		.of_match_table = ehea_device_table,
 122	},
 123	.probe = ehea_probe_adapter,
 124	.remove_new = ehea_remove,
 125};
 126
 127void ehea_dump(void *adr, int len, char *msg)
 128{
 129	int x;
 130	unsigned char *deb = adr;
 131	for (x = 0; x < len; x += 16) {
 132		pr_info("%s adr=%p ofs=%04x %016llx %016llx\n",
 133			msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8]));
 134		deb += 16;
 135	}
 136}
 137
 138static void ehea_schedule_port_reset(struct ehea_port *port)
 139{
 140	if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags))
 141		schedule_work(&port->reset_task);
 142}
 143
 144static void ehea_update_firmware_handles(void)
 145{
 146	struct ehea_fw_handle_entry *arr = NULL;
 147	struct ehea_adapter *adapter;
 148	int num_adapters = 0;
 149	int num_ports = 0;
 150	int num_portres = 0;
 151	int i = 0;
 152	int num_fw_handles, k, l;
 153
 154	/* Determine number of handles */
 155	mutex_lock(&ehea_fw_handles.lock);
 156
 157	list_for_each_entry(adapter, &adapter_list, list) {
 158		num_adapters++;
 159
 160		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 161			struct ehea_port *port = adapter->port[k];
 162
 163			if (!port || (port->state != EHEA_PORT_UP))
 164				continue;
 165
 166			num_ports++;
 167			num_portres += port->num_def_qps;
 168		}
 169	}
 170
 171	num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES +
 172			 num_ports * EHEA_NUM_PORT_FW_HANDLES +
 173			 num_portres * EHEA_NUM_PORTRES_FW_HANDLES;
 174
 175	if (num_fw_handles) {
 176		arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL);
 177		if (!arr)
 178			goto out;  /* Keep the existing array */
 179	} else
 180		goto out_update;
 181
 182	list_for_each_entry(adapter, &adapter_list, list) {
 183		if (num_adapters == 0)
 184			break;
 185
 186		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 187			struct ehea_port *port = adapter->port[k];
 188
 189			if (!port || (port->state != EHEA_PORT_UP) ||
 190			    (num_ports == 0))
 191				continue;
 192
 193			for (l = 0; l < port->num_def_qps; l++) {
 194				struct ehea_port_res *pr = &port->port_res[l];
 195
 196				arr[i].adh = adapter->handle;
 197				arr[i++].fwh = pr->qp->fw_handle;
 198				arr[i].adh = adapter->handle;
 199				arr[i++].fwh = pr->send_cq->fw_handle;
 200				arr[i].adh = adapter->handle;
 201				arr[i++].fwh = pr->recv_cq->fw_handle;
 202				arr[i].adh = adapter->handle;
 203				arr[i++].fwh = pr->eq->fw_handle;
 204				arr[i].adh = adapter->handle;
 205				arr[i++].fwh = pr->send_mr.handle;
 206				arr[i].adh = adapter->handle;
 207				arr[i++].fwh = pr->recv_mr.handle;
 208			}
 209			arr[i].adh = adapter->handle;
 210			arr[i++].fwh = port->qp_eq->fw_handle;
 211			num_ports--;
 212		}
 213
 214		arr[i].adh = adapter->handle;
 215		arr[i++].fwh = adapter->neq->fw_handle;
 216
 217		if (adapter->mr.handle) {
 218			arr[i].adh = adapter->handle;
 219			arr[i++].fwh = adapter->mr.handle;
 220		}
 221		num_adapters--;
 222	}
 223
 224out_update:
 225	kfree(ehea_fw_handles.arr);
 226	ehea_fw_handles.arr = arr;
 227	ehea_fw_handles.num_entries = i;
 228out:
 229	mutex_unlock(&ehea_fw_handles.lock);
 230}
 231
 232static void ehea_update_bcmc_registrations(void)
 233{
 234	unsigned long flags;
 235	struct ehea_bcmc_reg_entry *arr = NULL;
 236	struct ehea_adapter *adapter;
 237	struct ehea_mc_list *mc_entry;
 238	int num_registrations = 0;
 239	int i = 0;
 240	int k;
 241
 242	spin_lock_irqsave(&ehea_bcmc_regs.lock, flags);
 243
 244	/* Determine number of registrations */
 245	list_for_each_entry(adapter, &adapter_list, list)
 246		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 247			struct ehea_port *port = adapter->port[k];
 248
 249			if (!port || (port->state != EHEA_PORT_UP))
 250				continue;
 251
 252			num_registrations += 2;	/* Broadcast registrations */
 253
 254			list_for_each_entry(mc_entry, &port->mc_list->list,list)
 255				num_registrations += 2;
 256		}
 257
 258	if (num_registrations) {
 259		arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC);
 260		if (!arr)
 261			goto out;  /* Keep the existing array */
 262	} else
 263		goto out_update;
 264
 265	list_for_each_entry(adapter, &adapter_list, list) {
 266		for (k = 0; k < EHEA_MAX_PORTS; k++) {
 267			struct ehea_port *port = adapter->port[k];
 268
 269			if (!port || (port->state != EHEA_PORT_UP))
 270				continue;
 271
 272			if (num_registrations == 0)
 273				goto out_update;
 274
 275			arr[i].adh = adapter->handle;
 276			arr[i].port_id = port->logical_port_id;
 277			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 278					  EHEA_BCMC_UNTAGGED;
 279			arr[i++].macaddr = port->mac_addr;
 280
 281			arr[i].adh = adapter->handle;
 282			arr[i].port_id = port->logical_port_id;
 283			arr[i].reg_type = EHEA_BCMC_BROADCAST |
 284					  EHEA_BCMC_VLANID_ALL;
 285			arr[i++].macaddr = port->mac_addr;
 286			num_registrations -= 2;
 287
 288			list_for_each_entry(mc_entry,
 289					    &port->mc_list->list, list) {
 290				if (num_registrations == 0)
 291					goto out_update;
 292
 293				arr[i].adh = adapter->handle;
 294				arr[i].port_id = port->logical_port_id;
 295				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 296						  EHEA_BCMC_UNTAGGED;
 297				if (mc_entry->macaddr == 0)
 298					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 299				arr[i++].macaddr = mc_entry->macaddr;
 300
 301				arr[i].adh = adapter->handle;
 302				arr[i].port_id = port->logical_port_id;
 303				arr[i].reg_type = EHEA_BCMC_MULTICAST |
 304						  EHEA_BCMC_VLANID_ALL;
 305				if (mc_entry->macaddr == 0)
 306					arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL;
 307				arr[i++].macaddr = mc_entry->macaddr;
 308				num_registrations -= 2;
 309			}
 310		}
 311	}
 312
 313out_update:
 314	kfree(ehea_bcmc_regs.arr);
 315	ehea_bcmc_regs.arr = arr;
 316	ehea_bcmc_regs.num_entries = i;
 317out:
 318	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 319}
 320
 321static void ehea_get_stats64(struct net_device *dev,
 322			     struct rtnl_link_stats64 *stats)
 323{
 324	struct ehea_port *port = netdev_priv(dev);
 325	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 326	int i;
 327
 328	for (i = 0; i < port->num_def_qps; i++) {
 329		rx_packets += port->port_res[i].rx_packets;
 330		rx_bytes   += port->port_res[i].rx_bytes;
 331	}
 332
 333	for (i = 0; i < port->num_def_qps; i++) {
 334		tx_packets += port->port_res[i].tx_packets;
 335		tx_bytes   += port->port_res[i].tx_bytes;
 336	}
 337
 338	stats->tx_packets = tx_packets;
 339	stats->rx_bytes = rx_bytes;
 340	stats->tx_bytes = tx_bytes;
 341	stats->rx_packets = rx_packets;
 342
 343	stats->multicast = port->stats.multicast;
 344	stats->rx_errors = port->stats.rx_errors;
 
 345}
 346
 347static void ehea_update_stats(struct work_struct *work)
 348{
 349	struct ehea_port *port =
 350		container_of(work, struct ehea_port, stats_work.work);
 351	struct net_device *dev = port->netdev;
 352	struct rtnl_link_stats64 *stats = &port->stats;
 353	struct hcp_ehea_port_cb2 *cb2;
 354	u64 hret;
 355
 356	cb2 = (void *)get_zeroed_page(GFP_KERNEL);
 357	if (!cb2) {
 358		netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n");
 359		goto resched;
 360	}
 361
 362	hret = ehea_h_query_ehea_port(port->adapter->handle,
 363				      port->logical_port_id,
 364				      H_PORT_CB2, H_PORT_CB2_ALL, cb2);
 365	if (hret != H_SUCCESS) {
 366		netdev_err(dev, "query_ehea_port failed\n");
 367		goto out_herr;
 368	}
 369
 370	if (netif_msg_hw(port))
 371		ehea_dump(cb2, sizeof(*cb2), "net_device_stats");
 372
 373	stats->multicast = cb2->rxmcp;
 374	stats->rx_errors = cb2->rxuerr;
 375
 376out_herr:
 377	free_page((unsigned long)cb2);
 378resched:
 379	schedule_delayed_work(&port->stats_work,
 380			      round_jiffies_relative(msecs_to_jiffies(1000)));
 381}
 382
 383static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes)
 384{
 385	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 386	struct net_device *dev = pr->port->netdev;
 387	int max_index_mask = pr->rq1_skba.len - 1;
 388	int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes;
 389	int adder = 0;
 390	int i;
 391
 392	pr->rq1_skba.os_skbs = 0;
 393
 394	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 395		if (nr_of_wqes > 0)
 396			pr->rq1_skba.index = index;
 397		pr->rq1_skba.os_skbs = fill_wqes;
 398		return;
 399	}
 400
 401	for (i = 0; i < fill_wqes; i++) {
 402		if (!skb_arr_rq1[index]) {
 403			skb_arr_rq1[index] = netdev_alloc_skb(dev,
 404							      EHEA_L_PKT_SIZE);
 405			if (!skb_arr_rq1[index]) {
 406				pr->rq1_skba.os_skbs = fill_wqes - i;
 407				break;
 408			}
 409		}
 410		index--;
 411		index &= max_index_mask;
 412		adder++;
 413	}
 414
 415	if (adder == 0)
 416		return;
 417
 418	/* Ring doorbell */
 419	ehea_update_rq1a(pr->qp, adder);
 420}
 421
 422static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a)
 423{
 424	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 425	struct net_device *dev = pr->port->netdev;
 426	int i;
 427
 428	if (nr_rq1a > pr->rq1_skba.len) {
 429		netdev_err(dev, "NR_RQ1A bigger than skb array len\n");
 430		return;
 431	}
 432
 433	for (i = 0; i < nr_rq1a; i++) {
 434		skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE);
 435		if (!skb_arr_rq1[i])
 436			break;
 437	}
 438	/* Ring doorbell */
 439	ehea_update_rq1a(pr->qp, i - 1);
 440}
 441
 442static int ehea_refill_rq_def(struct ehea_port_res *pr,
 443			      struct ehea_q_skb_arr *q_skba, int rq_nr,
 444			      int num_wqes, int wqe_type, int packet_size)
 445{
 446	struct net_device *dev = pr->port->netdev;
 447	struct ehea_qp *qp = pr->qp;
 448	struct sk_buff **skb_arr = q_skba->arr;
 449	struct ehea_rwqe *rwqe;
 450	int i, index, max_index_mask, fill_wqes;
 451	int adder = 0;
 452	int ret = 0;
 453
 454	fill_wqes = q_skba->os_skbs + num_wqes;
 455	q_skba->os_skbs = 0;
 456
 457	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
 458		q_skba->os_skbs = fill_wqes;
 459		return ret;
 460	}
 461
 462	index = q_skba->index;
 463	max_index_mask = q_skba->len - 1;
 464	for (i = 0; i < fill_wqes; i++) {
 465		u64 tmp_addr;
 466		struct sk_buff *skb;
 467
 468		skb = netdev_alloc_skb_ip_align(dev, packet_size);
 469		if (!skb) {
 470			q_skba->os_skbs = fill_wqes - i;
 471			if (q_skba->os_skbs == q_skba->len - 2) {
 472				netdev_info(pr->port->netdev,
 473					    "rq%i ran dry - no mem for skb\n",
 474					    rq_nr);
 475				ret = -ENOMEM;
 476			}
 477			break;
 478		}
 479
 480		skb_arr[index] = skb;
 481		tmp_addr = ehea_map_vaddr(skb->data);
 482		if (tmp_addr == -1) {
 483			dev_consume_skb_any(skb);
 484			q_skba->os_skbs = fill_wqes - i;
 485			ret = 0;
 486			break;
 487		}
 488
 489		rwqe = ehea_get_next_rwqe(qp, rq_nr);
 490		rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type)
 491			    | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index);
 492		rwqe->sg_list[0].l_key = pr->recv_mr.lkey;
 493		rwqe->sg_list[0].vaddr = tmp_addr;
 494		rwqe->sg_list[0].len = packet_size;
 495		rwqe->data_segments = 1;
 496
 497		index++;
 498		index &= max_index_mask;
 499		adder++;
 500	}
 501
 502	q_skba->index = index;
 503	if (adder == 0)
 504		goto out;
 505
 506	/* Ring doorbell */
 507	iosync();
 508	if (rq_nr == 2)
 509		ehea_update_rq2a(pr->qp, adder);
 510	else
 511		ehea_update_rq3a(pr->qp, adder);
 512out:
 513	return ret;
 514}
 515
 516
 517static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes)
 518{
 519	return ehea_refill_rq_def(pr, &pr->rq2_skba, 2,
 520				  nr_of_wqes, EHEA_RWQE2_TYPE,
 521				  EHEA_RQ2_PKT_SIZE);
 522}
 523
 524
 525static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes)
 526{
 527	return ehea_refill_rq_def(pr, &pr->rq3_skba, 3,
 528				  nr_of_wqes, EHEA_RWQE3_TYPE,
 529				  EHEA_MAX_PACKET_SIZE);
 530}
 531
 532static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 533{
 534	*rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5;
 535	if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0)
 536		return 0;
 537	if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) &&
 538	    (cqe->header_length == 0))
 539		return 0;
 540	return -EINVAL;
 541}
 542
 543static inline void ehea_fill_skb(struct net_device *dev,
 544				 struct sk_buff *skb, struct ehea_cqe *cqe,
 545				 struct ehea_port_res *pr)
 546{
 547	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */
 548
 549	skb_put(skb, length);
 550	skb->protocol = eth_type_trans(skb, dev);
 551
 552	/* The packet was not an IPV4 packet so a complemented checksum was
 553	   calculated. The value is found in the Internet Checksum field. */
 554	if (cqe->status & EHEA_CQE_BLIND_CKSUM) {
 555		skb->ip_summed = CHECKSUM_COMPLETE;
 556		skb->csum = csum_unfold(~cqe->inet_checksum_value);
 557	} else
 558		skb->ip_summed = CHECKSUM_UNNECESSARY;
 559
 560	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 561}
 562
 563static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
 564					       int arr_len,
 565					       struct ehea_cqe *cqe)
 566{
 567	int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 568	struct sk_buff *skb;
 569	void *pref;
 570	int x;
 571
 572	x = skb_index + 1;
 573	x &= (arr_len - 1);
 574
 575	pref = skb_array[x];
 576	if (pref) {
 577		prefetchw(pref);
 578		prefetchw(pref + EHEA_CACHE_LINE);
 579
 580		pref = (skb_array[x]->data);
 581		prefetch(pref);
 582		prefetch(pref + EHEA_CACHE_LINE);
 583		prefetch(pref + EHEA_CACHE_LINE * 2);
 584		prefetch(pref + EHEA_CACHE_LINE * 3);
 585	}
 586
 587	skb = skb_array[skb_index];
 588	skb_array[skb_index] = NULL;
 589	return skb;
 590}
 591
 592static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array,
 593						  int arr_len, int wqe_index)
 594{
 595	struct sk_buff *skb;
 596	void *pref;
 597	int x;
 598
 599	x = wqe_index + 1;
 600	x &= (arr_len - 1);
 601
 602	pref = skb_array[x];
 603	if (pref) {
 604		prefetchw(pref);
 605		prefetchw(pref + EHEA_CACHE_LINE);
 606
 607		pref = (skb_array[x]->data);
 608		prefetchw(pref);
 609		prefetchw(pref + EHEA_CACHE_LINE);
 610	}
 611
 612	skb = skb_array[wqe_index];
 613	skb_array[wqe_index] = NULL;
 614	return skb;
 615}
 616
 617static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 618				 struct ehea_cqe *cqe, int *processed_rq2,
 619				 int *processed_rq3)
 620{
 621	struct sk_buff *skb;
 622
 623	if (cqe->status & EHEA_CQE_STAT_ERR_TCP)
 624		pr->p_stats.err_tcp_cksum++;
 625	if (cqe->status & EHEA_CQE_STAT_ERR_IP)
 626		pr->p_stats.err_ip_cksum++;
 627	if (cqe->status & EHEA_CQE_STAT_ERR_CRC)
 628		pr->p_stats.err_frame_crc++;
 629
 630	if (rq == 2) {
 631		*processed_rq2 += 1;
 632		skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe);
 633		dev_kfree_skb(skb);
 634	} else if (rq == 3) {
 635		*processed_rq3 += 1;
 636		skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe);
 637		dev_kfree_skb(skb);
 638	}
 639
 640	if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) {
 641		if (netif_msg_rx_err(pr->port)) {
 642			pr_err("Critical receive error for QP %d. Resetting port.\n",
 643			       pr->qp->init_attr.qp_nr);
 644			ehea_dump(cqe, sizeof(*cqe), "CQE");
 645		}
 646		ehea_schedule_port_reset(pr->port);
 647		return 1;
 648	}
 649
 650	return 0;
 651}
 652
 653static int ehea_proc_rwqes(struct net_device *dev,
 654			   struct ehea_port_res *pr,
 655			   int budget)
 656{
 657	struct ehea_port *port = pr->port;
 658	struct ehea_qp *qp = pr->qp;
 659	struct ehea_cqe *cqe;
 660	struct sk_buff *skb;
 661	struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr;
 662	struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr;
 663	struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr;
 664	int skb_arr_rq1_len = pr->rq1_skba.len;
 665	int skb_arr_rq2_len = pr->rq2_skba.len;
 666	int skb_arr_rq3_len = pr->rq3_skba.len;
 667	int processed, processed_rq1, processed_rq2, processed_rq3;
 668	u64 processed_bytes = 0;
 669	int wqe_index, last_wqe_index, rq, port_reset;
 670
 671	processed = processed_rq1 = processed_rq2 = processed_rq3 = 0;
 672	last_wqe_index = 0;
 673
 674	cqe = ehea_poll_rq1(qp, &wqe_index);
 675	while ((processed < budget) && cqe) {
 676		ehea_inc_rq1(qp);
 677		processed_rq1++;
 678		processed++;
 679		if (netif_msg_rx_status(port))
 680			ehea_dump(cqe, sizeof(*cqe), "CQE");
 681
 682		last_wqe_index = wqe_index;
 683		rmb();
 684		if (!ehea_check_cqe(cqe, &rq)) {
 685			if (rq == 1) {
 686				/* LL RQ1 */
 687				skb = get_skb_by_index_ll(skb_arr_rq1,
 688							  skb_arr_rq1_len,
 689							  wqe_index);
 690				if (unlikely(!skb)) {
 691					netif_info(port, rx_err, dev,
 692						  "LL rq1: skb=NULL\n");
 693
 694					skb = netdev_alloc_skb(dev,
 695							       EHEA_L_PKT_SIZE);
 696					if (!skb)
 697						break;
 698				}
 699				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 700						 cqe->num_bytes_transfered - 4);
 701				ehea_fill_skb(dev, skb, cqe, pr);
 702			} else if (rq == 2) {
 703				/* RQ2 */
 704				skb = get_skb_by_index(skb_arr_rq2,
 705						       skb_arr_rq2_len, cqe);
 706				if (unlikely(!skb)) {
 707					netif_err(port, rx_err, dev,
 708						  "rq2: skb=NULL\n");
 709					break;
 710				}
 711				ehea_fill_skb(dev, skb, cqe, pr);
 712				processed_rq2++;
 713			} else {
 714				/* RQ3 */
 715				skb = get_skb_by_index(skb_arr_rq3,
 716						       skb_arr_rq3_len, cqe);
 717				if (unlikely(!skb)) {
 718					netif_err(port, rx_err, dev,
 719						  "rq3: skb=NULL\n");
 720					break;
 721				}
 722				ehea_fill_skb(dev, skb, cqe, pr);
 723				processed_rq3++;
 724			}
 725
 726			processed_bytes += skb->len;
 727
 728			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 729				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
 730						       cqe->vlan_tag);
 731
 732			napi_gro_receive(&pr->napi, skb);
 733		} else {
 734			pr->p_stats.poll_receive_errors++;
 735			port_reset = ehea_treat_poll_error(pr, rq, cqe,
 736							   &processed_rq2,
 737							   &processed_rq3);
 738			if (port_reset)
 739				break;
 740		}
 741		cqe = ehea_poll_rq1(qp, &wqe_index);
 742	}
 743
 744	pr->rx_packets += processed;
 745	pr->rx_bytes += processed_bytes;
 746
 747	ehea_refill_rq1(pr, last_wqe_index, processed_rq1);
 748	ehea_refill_rq2(pr, processed_rq2);
 749	ehea_refill_rq3(pr, processed_rq3);
 750
 751	return processed;
 752}
 753
 754#define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull
 755
 756static void reset_sq_restart_flag(struct ehea_port *port)
 757{
 758	int i;
 759
 760	for (i = 0; i < port->num_def_qps; i++) {
 761		struct ehea_port_res *pr = &port->port_res[i];
 762		pr->sq_restart_flag = 0;
 763	}
 764	wake_up(&port->restart_wq);
 765}
 766
 767static void check_sqs(struct ehea_port *port)
 768{
 769	struct ehea_swqe *swqe;
 770	int swqe_index;
 771	int i;
 772
 773	for (i = 0; i < port->num_def_qps; i++) {
 774		struct ehea_port_res *pr = &port->port_res[i];
 775		int ret;
 
 776		swqe = ehea_get_swqe(pr->qp, &swqe_index);
 777		memset(swqe, 0, SWQE_HEADER_SIZE);
 778		atomic_dec(&pr->swqe_avail);
 779
 780		swqe->tx_control |= EHEA_SWQE_PURGE;
 781		swqe->wr_id = SWQE_RESTART_CHECK;
 782		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
 783		swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT;
 784		swqe->immediate_data_length = 80;
 785
 786		ehea_post_swqe(pr->qp, swqe);
 787
 788		ret = wait_event_timeout(port->restart_wq,
 789					 pr->sq_restart_flag == 0,
 790					 msecs_to_jiffies(100));
 791
 792		if (!ret) {
 793			pr_err("HW/SW queues out of sync\n");
 794			ehea_schedule_port_reset(pr->port);
 795			return;
 796		}
 797	}
 798}
 799
 800
 801static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 802{
 803	struct sk_buff *skb;
 804	struct ehea_cq *send_cq = pr->send_cq;
 805	struct ehea_cqe *cqe;
 806	int quota = my_quota;
 807	int cqe_counter = 0;
 808	int swqe_av = 0;
 809	int index;
 810	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
 811						pr - &pr->port->port_res[0]);
 812
 813	cqe = ehea_poll_cq(send_cq);
 814	while (cqe && (quota > 0)) {
 815		ehea_inc_cq(send_cq);
 816
 817		cqe_counter++;
 818		rmb();
 819
 820		if (cqe->wr_id == SWQE_RESTART_CHECK) {
 821			pr->sq_restart_flag = 1;
 822			swqe_av++;
 823			break;
 824		}
 825
 826		if (cqe->status & EHEA_CQE_STAT_ERR_MASK) {
 827			pr_err("Bad send completion status=0x%04X\n",
 828			       cqe->status);
 829
 830			if (netif_msg_tx_err(pr->port))
 831				ehea_dump(cqe, sizeof(*cqe), "Send CQE");
 832
 833			if (cqe->status & EHEA_CQE_STAT_RESET_MASK) {
 834				pr_err("Resetting port\n");
 835				ehea_schedule_port_reset(pr->port);
 836				break;
 837			}
 838		}
 839
 840		if (netif_msg_tx_done(pr->port))
 841			ehea_dump(cqe, sizeof(*cqe), "CQE");
 842
 843		if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id)
 844			   == EHEA_SWQE2_TYPE)) {
 845
 846			index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id);
 847			skb = pr->sq_skba.arr[index];
 848			dev_consume_skb_any(skb);
 849			pr->sq_skba.arr[index] = NULL;
 850		}
 851
 852		swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id);
 853		quota--;
 854
 855		cqe = ehea_poll_cq(send_cq);
 856	}
 857
 858	ehea_update_feca(send_cq, cqe_counter);
 859	atomic_add(swqe_av, &pr->swqe_avail);
 860
 861	if (unlikely(netif_tx_queue_stopped(txq) &&
 862		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
 863		__netif_tx_lock(txq, smp_processor_id());
 864		if (netif_tx_queue_stopped(txq) &&
 865		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
 866			netif_tx_wake_queue(txq);
 867		__netif_tx_unlock(txq);
 868	}
 869
 870	wake_up(&pr->port->swqe_avail_wq);
 871
 872	return cqe;
 873}
 874
 875#define EHEA_POLL_MAX_CQES 65535
 876
 877static int ehea_poll(struct napi_struct *napi, int budget)
 878{
 879	struct ehea_port_res *pr = container_of(napi, struct ehea_port_res,
 880						napi);
 881	struct net_device *dev = pr->port->netdev;
 882	struct ehea_cqe *cqe;
 883	struct ehea_cqe *cqe_skb = NULL;
 884	int wqe_index;
 885	int rx = 0;
 886
 887	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 888	rx += ehea_proc_rwqes(dev, pr, budget - rx);
 889
 890	while (rx != budget) {
 891		napi_complete(napi);
 892		ehea_reset_cq_ep(pr->recv_cq);
 893		ehea_reset_cq_ep(pr->send_cq);
 894		ehea_reset_cq_n1(pr->recv_cq);
 895		ehea_reset_cq_n1(pr->send_cq);
 896		rmb();
 897		cqe = ehea_poll_rq1(pr->qp, &wqe_index);
 898		cqe_skb = ehea_poll_cq(pr->send_cq);
 899
 900		if (!cqe && !cqe_skb)
 901			return rx;
 902
 903		if (!napi_schedule(napi))
 904			return rx;
 905
 906		cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
 907		rx += ehea_proc_rwqes(dev, pr, budget - rx);
 908	}
 909
 910	return rx;
 911}
 912
 
 
 
 
 
 
 
 
 
 
 
 913static irqreturn_t ehea_recv_irq_handler(int irq, void *param)
 914{
 915	struct ehea_port_res *pr = param;
 916
 917	napi_schedule(&pr->napi);
 918
 919	return IRQ_HANDLED;
 920}
 921
 922static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param)
 923{
 924	struct ehea_port *port = param;
 925	struct ehea_eqe *eqe;
 926	struct ehea_qp *qp;
 927	u32 qp_token;
 928	u64 resource_type, aer, aerr;
 929	int reset_port = 0;
 930
 931	eqe = ehea_poll_eq(port->qp_eq);
 932
 933	while (eqe) {
 934		qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry);
 935		pr_err("QP aff_err: entry=0x%llx, token=0x%x\n",
 936		       eqe->entry, qp_token);
 937
 938		qp = port->port_res[qp_token].qp;
 939
 940		resource_type = ehea_error_data(port->adapter, qp->fw_handle,
 941						&aer, &aerr);
 942
 943		if (resource_type == EHEA_AER_RESTYPE_QP) {
 944			if ((aer & EHEA_AER_RESET_MASK) ||
 945			    (aerr & EHEA_AERR_RESET_MASK))
 946				 reset_port = 1;
 947		} else
 948			reset_port = 1;   /* Reset in case of CQ or EQ error */
 949
 950		eqe = ehea_poll_eq(port->qp_eq);
 951	}
 952
 953	if (reset_port) {
 954		pr_err("Resetting port\n");
 955		ehea_schedule_port_reset(port);
 956	}
 957
 958	return IRQ_HANDLED;
 959}
 960
 961static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 962				       int logical_port)
 963{
 964	int i;
 965
 966	for (i = 0; i < EHEA_MAX_PORTS; i++)
 967		if (adapter->port[i])
 968			if (adapter->port[i]->logical_port_id == logical_port)
 969				return adapter->port[i];
 970	return NULL;
 971}
 972
 973int ehea_sense_port_attr(struct ehea_port *port)
 974{
 975	int ret;
 976	u64 hret;
 977	struct hcp_ehea_port_cb0 *cb0;
 978
 979	/* may be called via ehea_neq_tasklet() */
 980	cb0 = (void *)get_zeroed_page(GFP_ATOMIC);
 981	if (!cb0) {
 982		pr_err("no mem for cb0\n");
 983		ret = -ENOMEM;
 984		goto out;
 985	}
 986
 987	hret = ehea_h_query_ehea_port(port->adapter->handle,
 988				      port->logical_port_id, H_PORT_CB0,
 989				      EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF),
 990				      cb0);
 991	if (hret != H_SUCCESS) {
 992		ret = -EIO;
 993		goto out_free;
 994	}
 995
 996	/* MAC address */
 997	port->mac_addr = cb0->port_mac_addr << 16;
 998
 999	if (!is_valid_ether_addr((u8 *)&port->mac_addr)) {
1000		ret = -EADDRNOTAVAIL;
1001		goto out_free;
1002	}
1003
1004	/* Port speed */
1005	switch (cb0->port_speed) {
1006	case H_SPEED_10M_H:
1007		port->port_speed = EHEA_SPEED_10M;
1008		port->full_duplex = 0;
1009		break;
1010	case H_SPEED_10M_F:
1011		port->port_speed = EHEA_SPEED_10M;
1012		port->full_duplex = 1;
1013		break;
1014	case H_SPEED_100M_H:
1015		port->port_speed = EHEA_SPEED_100M;
1016		port->full_duplex = 0;
1017		break;
1018	case H_SPEED_100M_F:
1019		port->port_speed = EHEA_SPEED_100M;
1020		port->full_duplex = 1;
1021		break;
1022	case H_SPEED_1G_F:
1023		port->port_speed = EHEA_SPEED_1G;
1024		port->full_duplex = 1;
1025		break;
1026	case H_SPEED_10G_F:
1027		port->port_speed = EHEA_SPEED_10G;
1028		port->full_duplex = 1;
1029		break;
1030	default:
1031		port->port_speed = 0;
1032		port->full_duplex = 0;
1033		break;
1034	}
1035
1036	port->autoneg = 1;
1037	port->num_mcs = cb0->num_default_qps;
1038
1039	/* Number of default QPs */
1040	if (use_mcs)
1041		port->num_def_qps = cb0->num_default_qps;
1042	else
1043		port->num_def_qps = 1;
1044
1045	if (!port->num_def_qps) {
1046		ret = -EINVAL;
1047		goto out_free;
1048	}
1049
1050	ret = 0;
1051out_free:
1052	if (ret || netif_msg_probe(port))
1053		ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr");
1054	free_page((unsigned long)cb0);
1055out:
1056	return ret;
1057}
1058
1059int ehea_set_portspeed(struct ehea_port *port, u32 port_speed)
1060{
1061	struct hcp_ehea_port_cb4 *cb4;
1062	u64 hret;
1063	int ret = 0;
1064
1065	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
1066	if (!cb4) {
1067		pr_err("no mem for cb4\n");
1068		ret = -ENOMEM;
1069		goto out;
1070	}
1071
1072	cb4->port_speed = port_speed;
1073
1074	netif_carrier_off(port->netdev);
1075
1076	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1077				       port->logical_port_id,
1078				       H_PORT_CB4, H_PORT_CB4_SPEED, cb4);
1079	if (hret == H_SUCCESS) {
1080		port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0;
1081
1082		hret = ehea_h_query_ehea_port(port->adapter->handle,
1083					      port->logical_port_id,
1084					      H_PORT_CB4, H_PORT_CB4_SPEED,
1085					      cb4);
1086		if (hret == H_SUCCESS) {
1087			switch (cb4->port_speed) {
1088			case H_SPEED_10M_H:
1089				port->port_speed = EHEA_SPEED_10M;
1090				port->full_duplex = 0;
1091				break;
1092			case H_SPEED_10M_F:
1093				port->port_speed = EHEA_SPEED_10M;
1094				port->full_duplex = 1;
1095				break;
1096			case H_SPEED_100M_H:
1097				port->port_speed = EHEA_SPEED_100M;
1098				port->full_duplex = 0;
1099				break;
1100			case H_SPEED_100M_F:
1101				port->port_speed = EHEA_SPEED_100M;
1102				port->full_duplex = 1;
1103				break;
1104			case H_SPEED_1G_F:
1105				port->port_speed = EHEA_SPEED_1G;
1106				port->full_duplex = 1;
1107				break;
1108			case H_SPEED_10G_F:
1109				port->port_speed = EHEA_SPEED_10G;
1110				port->full_duplex = 1;
1111				break;
1112			default:
1113				port->port_speed = 0;
1114				port->full_duplex = 0;
1115				break;
1116			}
1117		} else {
1118			pr_err("Failed sensing port speed\n");
1119			ret = -EIO;
1120		}
1121	} else {
1122		if (hret == H_AUTHORITY) {
1123			pr_info("Hypervisor denied setting port speed\n");
1124			ret = -EPERM;
1125		} else {
1126			ret = -EIO;
1127			pr_err("Failed setting port speed\n");
1128		}
1129	}
1130	if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP))
1131		netif_carrier_on(port->netdev);
1132
1133	free_page((unsigned long)cb4);
1134out:
1135	return ret;
1136}
1137
1138static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
1139{
1140	int ret;
1141	u8 ec;
1142	u8 portnum;
1143	struct ehea_port *port;
1144	struct net_device *dev;
1145
1146	ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
1147	portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
1148	port = ehea_get_port(adapter, portnum);
1149	if (!port) {
1150		netdev_err(NULL, "unknown portnum %x\n", portnum);
1151		return;
1152	}
1153	dev = port->netdev;
1154
1155	switch (ec) {
1156	case EHEA_EC_PORTSTATE_CHG:	/* port state change */
1157
 
 
 
 
 
1158		if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
1159			if (!netif_carrier_ok(dev)) {
1160				ret = ehea_sense_port_attr(port);
1161				if (ret) {
1162					netdev_err(dev, "failed resensing port attributes\n");
1163					break;
1164				}
1165
1166				netif_info(port, link, dev,
1167					   "Logical port up: %dMbps %s Duplex\n",
1168					   port->port_speed,
1169					   port->full_duplex == 1 ?
1170					   "Full" : "Half");
1171
1172				netif_carrier_on(dev);
1173				netif_wake_queue(dev);
1174			}
1175		} else
1176			if (netif_carrier_ok(dev)) {
1177				netif_info(port, link, dev,
1178					   "Logical port down\n");
1179				netif_carrier_off(dev);
1180				netif_tx_disable(dev);
1181			}
1182
1183		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
1184			port->phy_link = EHEA_PHY_LINK_UP;
1185			netif_info(port, link, dev,
1186				   "Physical port up\n");
1187			if (prop_carrier_state)
1188				netif_carrier_on(dev);
1189		} else {
1190			port->phy_link = EHEA_PHY_LINK_DOWN;
1191			netif_info(port, link, dev,
1192				   "Physical port down\n");
1193			if (prop_carrier_state)
1194				netif_carrier_off(dev);
1195		}
1196
1197		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe))
1198			netdev_info(dev,
1199				    "External switch port is primary port\n");
1200		else
1201			netdev_info(dev,
1202				    "External switch port is backup port\n");
1203
1204		break;
1205	case EHEA_EC_ADAPTER_MALFUNC:
1206		netdev_err(dev, "Adapter malfunction\n");
1207		break;
1208	case EHEA_EC_PORT_MALFUNC:
1209		netdev_info(dev, "Port malfunction\n");
1210		netif_carrier_off(dev);
1211		netif_tx_disable(dev);
1212		break;
1213	default:
1214		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
1215		break;
1216	}
1217}
1218
1219static void ehea_neq_tasklet(struct tasklet_struct *t)
1220{
1221	struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet);
1222	struct ehea_eqe *eqe;
1223	u64 event_mask;
1224
1225	eqe = ehea_poll_eq(adapter->neq);
1226	pr_debug("eqe=%p\n", eqe);
1227
1228	while (eqe) {
1229		pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry);
1230		ehea_parse_eqe(adapter, eqe->entry);
1231		eqe = ehea_poll_eq(adapter->neq);
1232		pr_debug("next eqe=%p\n", eqe);
1233	}
1234
1235	event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1)
1236		   | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1)
1237		   | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1);
1238
1239	ehea_h_reset_events(adapter->handle,
1240			    adapter->neq->fw_handle, event_mask);
1241}
1242
1243static irqreturn_t ehea_interrupt_neq(int irq, void *param)
1244{
1245	struct ehea_adapter *adapter = param;
1246	tasklet_hi_schedule(&adapter->neq_tasklet);
1247	return IRQ_HANDLED;
1248}
1249
1250
1251static int ehea_fill_port_res(struct ehea_port_res *pr)
1252{
1253	int ret;
1254	struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr;
1255
1256	ehea_init_fill_rq1(pr, pr->rq1_skba.len);
1257
1258	ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1);
1259
1260	ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1);
1261
1262	return ret;
1263}
1264
1265static int ehea_reg_interrupts(struct net_device *dev)
1266{
1267	struct ehea_port *port = netdev_priv(dev);
1268	struct ehea_port_res *pr;
1269	int i, ret;
1270
1271
1272	snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff",
1273		 dev->name);
1274
1275	ret = ibmebus_request_irq(port->qp_eq->attr.ist1,
1276				  ehea_qp_aff_irq_handler,
1277				  0, port->int_aff_name, port);
1278	if (ret) {
1279		netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n",
1280			   port->qp_eq->attr.ist1);
1281		goto out_free_qpeq;
1282	}
1283
1284	netif_info(port, ifup, dev,
1285		   "irq_handle 0x%X for function qp_aff_irq_handler registered\n",
1286		   port->qp_eq->attr.ist1);
1287
1288
1289	for (i = 0; i < port->num_def_qps; i++) {
1290		pr = &port->port_res[i];
1291		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
1292			 "%s-queue%d", dev->name, i);
1293		ret = ibmebus_request_irq(pr->eq->attr.ist1,
1294					  ehea_recv_irq_handler,
1295					  0, pr->int_send_name, pr);
1296		if (ret) {
1297			netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n",
1298				   i, pr->eq->attr.ist1);
1299			goto out_free_req;
1300		}
1301		netif_info(port, ifup, dev,
1302			   "irq_handle 0x%X for function ehea_queue_int %d registered\n",
1303			   pr->eq->attr.ist1, i);
1304	}
1305out:
1306	return ret;
1307
1308
1309out_free_req:
1310	while (--i >= 0) {
1311		u32 ist = port->port_res[i].eq->attr.ist1;
1312		ibmebus_free_irq(ist, &port->port_res[i]);
1313	}
1314
1315out_free_qpeq:
1316	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1317	i = port->num_def_qps;
1318
1319	goto out;
1320
1321}
1322
1323static void ehea_free_interrupts(struct net_device *dev)
1324{
1325	struct ehea_port *port = netdev_priv(dev);
1326	struct ehea_port_res *pr;
1327	int i;
1328
1329	/* send */
1330
1331	for (i = 0; i < port->num_def_qps; i++) {
1332		pr = &port->port_res[i];
1333		ibmebus_free_irq(pr->eq->attr.ist1, pr);
1334		netif_info(port, intr, dev,
1335			   "free send irq for res %d with handle 0x%X\n",
1336			   i, pr->eq->attr.ist1);
1337	}
1338
1339	/* associated events */
1340	ibmebus_free_irq(port->qp_eq->attr.ist1, port);
1341	netif_info(port, intr, dev,
1342		   "associated event interrupt for handle 0x%X freed\n",
1343		   port->qp_eq->attr.ist1);
1344}
1345
1346static int ehea_configure_port(struct ehea_port *port)
1347{
1348	int ret, i;
1349	u64 hret, mask;
1350	struct hcp_ehea_port_cb0 *cb0;
1351
1352	ret = -ENOMEM;
1353	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1354	if (!cb0)
1355		goto out;
1356
1357	cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1)
1358		     | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1)
1359		     | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1)
1360		     | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1)
1361		     | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER,
1362				      PXLY_RC_VLAN_FILTER)
1363		     | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1);
1364
1365	for (i = 0; i < port->num_mcs; i++)
1366		if (use_mcs)
1367			cb0->default_qpn_arr[i] =
1368				port->port_res[i].qp->init_attr.qp_nr;
1369		else
1370			cb0->default_qpn_arr[i] =
1371				port->port_res[0].qp->init_attr.qp_nr;
1372
1373	if (netif_msg_ifup(port))
1374		ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port");
1375
1376	mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1)
1377	     | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1);
1378
1379	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1380				       port->logical_port_id,
1381				       H_PORT_CB0, mask, cb0);
1382	ret = -EIO;
1383	if (hret != H_SUCCESS)
1384		goto out_free;
1385
1386	ret = 0;
1387
1388out_free:
1389	free_page((unsigned long)cb0);
1390out:
1391	return ret;
1392}
1393
1394static int ehea_gen_smrs(struct ehea_port_res *pr)
1395{
1396	int ret;
1397	struct ehea_adapter *adapter = pr->port->adapter;
1398
1399	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr);
1400	if (ret)
1401		goto out;
1402
1403	ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr);
1404	if (ret)
1405		goto out_free;
1406
1407	return 0;
1408
1409out_free:
1410	ehea_rem_mr(&pr->send_mr);
1411out:
1412	pr_err("Generating SMRS failed\n");
1413	return -EIO;
1414}
1415
1416static int ehea_rem_smrs(struct ehea_port_res *pr)
1417{
1418	if ((ehea_rem_mr(&pr->send_mr)) ||
1419	    (ehea_rem_mr(&pr->recv_mr)))
1420		return -EIO;
1421	else
1422		return 0;
1423}
1424
1425static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries)
1426{
1427	int arr_size = sizeof(void *) * max_q_entries;
1428
1429	q_skba->arr = vzalloc(arr_size);
1430	if (!q_skba->arr)
1431		return -ENOMEM;
1432
1433	q_skba->len = max_q_entries;
1434	q_skba->index = 0;
1435	q_skba->os_skbs = 0;
1436
1437	return 0;
1438}
1439
1440static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
1441			      struct port_res_cfg *pr_cfg, int queue_token)
1442{
1443	struct ehea_adapter *adapter = port->adapter;
1444	enum ehea_eq_type eq_type = EHEA_EQ;
1445	struct ehea_qp_init_attr *init_attr = NULL;
1446	int ret = -EIO;
1447	u64 tx_bytes, rx_bytes, tx_packets, rx_packets;
1448
1449	tx_bytes = pr->tx_bytes;
1450	tx_packets = pr->tx_packets;
1451	rx_bytes = pr->rx_bytes;
1452	rx_packets = pr->rx_packets;
1453
1454	memset(pr, 0, sizeof(struct ehea_port_res));
1455
1456	pr->tx_bytes = tx_bytes;
1457	pr->tx_packets = tx_packets;
1458	pr->rx_bytes = rx_bytes;
1459	pr->rx_packets = rx_packets;
1460
1461	pr->port = port;
1462
1463	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
1464	if (!pr->eq) {
1465		pr_err("create_eq failed (eq)\n");
1466		goto out_free;
1467	}
1468
1469	pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq,
1470				     pr->eq->fw_handle,
1471				     port->logical_port_id);
1472	if (!pr->recv_cq) {
1473		pr_err("create_cq failed (cq_recv)\n");
1474		goto out_free;
1475	}
1476
1477	pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq,
1478				     pr->eq->fw_handle,
1479				     port->logical_port_id);
1480	if (!pr->send_cq) {
1481		pr_err("create_cq failed (cq_send)\n");
1482		goto out_free;
1483	}
1484
1485	if (netif_msg_ifup(port))
1486		pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n",
1487			pr->send_cq->attr.act_nr_of_cqes,
1488			pr->recv_cq->attr.act_nr_of_cqes);
1489
1490	init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL);
1491	if (!init_attr) {
1492		ret = -ENOMEM;
1493		pr_err("no mem for ehea_qp_init_attr\n");
1494		goto out_free;
1495	}
1496
1497	init_attr->low_lat_rq1 = 1;
1498	init_attr->signalingtype = 1;	/* generate CQE if specified in WQE */
1499	init_attr->rq_count = 3;
1500	init_attr->qp_token = queue_token;
1501	init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq;
1502	init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1;
1503	init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2;
1504	init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3;
1505	init_attr->wqe_size_enc_sq = EHEA_SG_SQ;
1506	init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1;
1507	init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2;
1508	init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3;
1509	init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD;
1510	init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD;
1511	init_attr->port_nr = port->logical_port_id;
1512	init_attr->send_cq_handle = pr->send_cq->fw_handle;
1513	init_attr->recv_cq_handle = pr->recv_cq->fw_handle;
1514	init_attr->aff_eq_handle = port->qp_eq->fw_handle;
1515
1516	pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr);
1517	if (!pr->qp) {
1518		pr_err("create_qp failed\n");
1519		ret = -EIO;
1520		goto out_free;
1521	}
1522
1523	if (netif_msg_ifup(port))
1524		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",
1525			init_attr->qp_nr,
1526			init_attr->act_nr_send_wqes,
1527			init_attr->act_nr_rwqes_rq1,
1528			init_attr->act_nr_rwqes_rq2,
1529			init_attr->act_nr_rwqes_rq3);
1530
1531	pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
1532
1533	ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
1534	ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
1535	ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
1536	ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
1537	if (ret)
1538		goto out_free;
1539
1540	pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10;
1541	if (ehea_gen_smrs(pr) != 0) {
1542		ret = -EIO;
1543		goto out_free;
1544	}
1545
1546	atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1);
1547
1548	kfree(init_attr);
1549
1550	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll);
1551
1552	ret = 0;
1553	goto out;
1554
1555out_free:
1556	kfree(init_attr);
1557	vfree(pr->sq_skba.arr);
1558	vfree(pr->rq1_skba.arr);
1559	vfree(pr->rq2_skba.arr);
1560	vfree(pr->rq3_skba.arr);
1561	ehea_destroy_qp(pr->qp);
1562	ehea_destroy_cq(pr->send_cq);
1563	ehea_destroy_cq(pr->recv_cq);
1564	ehea_destroy_eq(pr->eq);
1565out:
1566	return ret;
1567}
1568
1569static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
1570{
1571	int ret, i;
1572
1573	if (pr->qp)
1574		netif_napi_del(&pr->napi);
1575
1576	ret = ehea_destroy_qp(pr->qp);
1577
1578	if (!ret) {
1579		ehea_destroy_cq(pr->send_cq);
1580		ehea_destroy_cq(pr->recv_cq);
1581		ehea_destroy_eq(pr->eq);
1582
1583		for (i = 0; i < pr->rq1_skba.len; i++)
1584			dev_kfree_skb(pr->rq1_skba.arr[i]);
 
1585
1586		for (i = 0; i < pr->rq2_skba.len; i++)
1587			dev_kfree_skb(pr->rq2_skba.arr[i]);
 
1588
1589		for (i = 0; i < pr->rq3_skba.len; i++)
1590			dev_kfree_skb(pr->rq3_skba.arr[i]);
 
1591
1592		for (i = 0; i < pr->sq_skba.len; i++)
1593			dev_kfree_skb(pr->sq_skba.arr[i]);
 
1594
1595		vfree(pr->rq1_skba.arr);
1596		vfree(pr->rq2_skba.arr);
1597		vfree(pr->rq3_skba.arr);
1598		vfree(pr->sq_skba.arr);
1599		ret = ehea_rem_smrs(pr);
1600	}
1601	return ret;
1602}
1603
1604static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
1605				  u32 lkey)
1606{
1607	int skb_data_size = skb_headlen(skb);
1608	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
1609	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
1610	unsigned int immediate_len = SWQE2_MAX_IMM;
1611
1612	swqe->descriptors = 0;
1613
1614	if (skb_is_gso(skb)) {
1615		swqe->tx_control |= EHEA_SWQE_TSO;
1616		swqe->mss = skb_shinfo(skb)->gso_size;
1617		/*
1618		 * For TSO packets we only copy the headers into the
1619		 * immediate area.
1620		 */
1621		immediate_len = skb_tcp_all_headers(skb);
1622	}
1623
1624	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
1625		skb_copy_from_linear_data(skb, imm_data, immediate_len);
1626		swqe->immediate_data_length = immediate_len;
1627
1628		if (skb_data_size > immediate_len) {
1629			sg1entry->l_key = lkey;
1630			sg1entry->len = skb_data_size - immediate_len;
1631			sg1entry->vaddr =
1632				ehea_map_vaddr(skb->data + immediate_len);
1633			swqe->descriptors++;
1634		}
1635	} else {
1636		skb_copy_from_linear_data(skb, imm_data, skb_data_size);
1637		swqe->immediate_data_length = skb_data_size;
1638	}
1639}
1640
1641static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
1642				    struct ehea_swqe *swqe, u32 lkey)
1643{
1644	struct ehea_vsgentry *sg_list, *sg1entry, *sgentry;
1645	skb_frag_t *frag;
1646	int nfrags, sg1entry_contains_frag_data, i;
1647
1648	nfrags = skb_shinfo(skb)->nr_frags;
1649	sg1entry = &swqe->u.immdata_desc.sg_entry;
1650	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
1651	sg1entry_contains_frag_data = 0;
1652
1653	write_swqe2_immediate(skb, swqe, lkey);
1654
1655	/* write descriptors */
1656	if (nfrags > 0) {
1657		if (swqe->descriptors == 0) {
1658			/* sg1entry not yet used */
1659			frag = &skb_shinfo(skb)->frags[0];
1660
1661			/* copy sg1entry data */
1662			sg1entry->l_key = lkey;
1663			sg1entry->len = skb_frag_size(frag);
1664			sg1entry->vaddr =
1665				ehea_map_vaddr(skb_frag_address(frag));
1666			swqe->descriptors++;
1667			sg1entry_contains_frag_data = 1;
1668		}
1669
1670		for (i = sg1entry_contains_frag_data; i < nfrags; i++) {
1671
1672			frag = &skb_shinfo(skb)->frags[i];
1673			sgentry = &sg_list[i - sg1entry_contains_frag_data];
1674
1675			sgentry->l_key = lkey;
1676			sgentry->len = skb_frag_size(frag);
1677			sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag));
1678			swqe->descriptors++;
1679		}
1680	}
1681}
1682
1683static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid)
1684{
1685	int ret = 0;
1686	u64 hret;
1687	u8 reg_type;
1688
1689	/* De/Register untagged packets */
1690	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED;
1691	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1692				     port->logical_port_id,
1693				     reg_type, port->mac_addr, 0, hcallid);
1694	if (hret != H_SUCCESS) {
1695		pr_err("%sregistering bc address failed (tagged)\n",
1696		       hcallid == H_REG_BCMC ? "" : "de");
1697		ret = -EIO;
1698		goto out_herr;
1699	}
1700
1701	/* De/Register VLAN packets */
1702	reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL;
1703	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1704				     port->logical_port_id,
1705				     reg_type, port->mac_addr, 0, hcallid);
1706	if (hret != H_SUCCESS) {
1707		pr_err("%sregistering bc address failed (vlan)\n",
1708		       hcallid == H_REG_BCMC ? "" : "de");
1709		ret = -EIO;
1710	}
1711out_herr:
1712	return ret;
1713}
1714
1715static int ehea_set_mac_addr(struct net_device *dev, void *sa)
1716{
1717	struct ehea_port *port = netdev_priv(dev);
1718	struct sockaddr *mac_addr = sa;
1719	struct hcp_ehea_port_cb0 *cb0;
1720	int ret;
1721	u64 hret;
1722
1723	if (!is_valid_ether_addr(mac_addr->sa_data)) {
1724		ret = -EADDRNOTAVAIL;
1725		goto out;
1726	}
1727
1728	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
1729	if (!cb0) {
1730		pr_err("no mem for cb0\n");
1731		ret = -ENOMEM;
1732		goto out;
1733	}
1734
1735	memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN);
1736
1737	cb0->port_mac_addr = cb0->port_mac_addr >> 16;
1738
1739	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1740				       port->logical_port_id, H_PORT_CB0,
1741				       EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0);
1742	if (hret != H_SUCCESS) {
1743		ret = -EIO;
1744		goto out_free;
1745	}
1746
1747	eth_hw_addr_set(dev, mac_addr->sa_data);
1748
1749	/* Deregister old MAC in pHYP */
1750	if (port->state == EHEA_PORT_UP) {
1751		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
1752		if (ret)
1753			goto out_upregs;
1754	}
1755
1756	port->mac_addr = cb0->port_mac_addr << 16;
1757
1758	/* Register new MAC in pHYP */
1759	if (port->state == EHEA_PORT_UP) {
1760		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
1761		if (ret)
1762			goto out_upregs;
1763	}
1764
1765	ret = 0;
1766
1767out_upregs:
1768	ehea_update_bcmc_registrations();
1769out_free:
1770	free_page((unsigned long)cb0);
1771out:
1772	return ret;
1773}
1774
1775static void ehea_promiscuous_error(u64 hret, int enable)
1776{
1777	if (hret == H_AUTHORITY)
1778		pr_info("Hypervisor denied %sabling promiscuous mode\n",
1779			enable == 1 ? "en" : "dis");
1780	else
1781		pr_err("failed %sabling promiscuous mode\n",
1782		       enable == 1 ? "en" : "dis");
1783}
1784
1785static void ehea_promiscuous(struct net_device *dev, int enable)
1786{
1787	struct ehea_port *port = netdev_priv(dev);
1788	struct hcp_ehea_port_cb7 *cb7;
1789	u64 hret;
1790
1791	if (enable == port->promisc)
1792		return;
1793
1794	cb7 = (void *)get_zeroed_page(GFP_ATOMIC);
1795	if (!cb7) {
1796		pr_err("no mem for cb7\n");
1797		goto out;
1798	}
1799
1800	/* Modify Pxs_DUCQPN in CB7 */
1801	cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0;
1802
1803	hret = ehea_h_modify_ehea_port(port->adapter->handle,
1804				       port->logical_port_id,
1805				       H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7);
1806	if (hret) {
1807		ehea_promiscuous_error(hret, enable);
1808		goto out;
1809	}
1810
1811	port->promisc = enable;
1812out:
1813	free_page((unsigned long)cb7);
1814}
1815
1816static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr,
1817				     u32 hcallid)
1818{
1819	u64 hret;
1820	u8 reg_type;
1821
1822	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED;
1823	if (mc_mac_addr == 0)
1824		reg_type |= EHEA_BCMC_SCOPE_ALL;
1825
1826	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1827				     port->logical_port_id,
1828				     reg_type, mc_mac_addr, 0, hcallid);
1829	if (hret)
1830		goto out;
1831
1832	reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL;
1833	if (mc_mac_addr == 0)
1834		reg_type |= EHEA_BCMC_SCOPE_ALL;
1835
1836	hret = ehea_h_reg_dereg_bcmc(port->adapter->handle,
1837				     port->logical_port_id,
1838				     reg_type, mc_mac_addr, 0, hcallid);
1839out:
1840	return hret;
1841}
1842
1843static int ehea_drop_multicast_list(struct net_device *dev)
1844{
1845	struct ehea_port *port = netdev_priv(dev);
1846	struct ehea_mc_list *mc_entry = port->mc_list;
1847	struct list_head *pos;
1848	struct list_head *temp;
1849	int ret = 0;
1850	u64 hret;
1851
1852	list_for_each_safe(pos, temp, &(port->mc_list->list)) {
1853		mc_entry = list_entry(pos, struct ehea_mc_list, list);
1854
1855		hret = ehea_multicast_reg_helper(port, mc_entry->macaddr,
1856						 H_DEREG_BCMC);
1857		if (hret) {
1858			pr_err("failed deregistering mcast MAC\n");
1859			ret = -EIO;
1860		}
1861
1862		list_del(pos);
1863		kfree(mc_entry);
1864	}
1865	return ret;
1866}
1867
1868static void ehea_allmulti(struct net_device *dev, int enable)
1869{
1870	struct ehea_port *port = netdev_priv(dev);
1871	u64 hret;
1872
1873	if (!port->allmulti) {
1874		if (enable) {
1875			/* Enable ALLMULTI */
1876			ehea_drop_multicast_list(dev);
1877			hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC);
1878			if (!hret)
1879				port->allmulti = 1;
1880			else
1881				netdev_err(dev,
1882					   "failed enabling IFF_ALLMULTI\n");
1883		}
1884	} else {
1885		if (!enable) {
1886			/* Disable ALLMULTI */
1887			hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC);
1888			if (!hret)
1889				port->allmulti = 0;
1890			else
1891				netdev_err(dev,
1892					   "failed disabling IFF_ALLMULTI\n");
1893		}
1894	}
1895}
1896
1897static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr)
1898{
1899	struct ehea_mc_list *ehea_mcl_entry;
1900	u64 hret;
1901
1902	ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC);
1903	if (!ehea_mcl_entry)
1904		return;
1905
1906	INIT_LIST_HEAD(&ehea_mcl_entry->list);
1907
1908	memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN);
1909
1910	hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr,
1911					 H_REG_BCMC);
1912	if (!hret)
1913		list_add(&ehea_mcl_entry->list, &port->mc_list->list);
1914	else {
1915		pr_err("failed registering mcast MAC\n");
1916		kfree(ehea_mcl_entry);
1917	}
1918}
1919
1920static void ehea_set_multicast_list(struct net_device *dev)
1921{
1922	struct ehea_port *port = netdev_priv(dev);
1923	struct netdev_hw_addr *ha;
1924	int ret;
1925
1926	ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC));
1927
1928	if (dev->flags & IFF_ALLMULTI) {
1929		ehea_allmulti(dev, 1);
1930		goto out;
1931	}
1932	ehea_allmulti(dev, 0);
1933
1934	if (!netdev_mc_empty(dev)) {
1935		ret = ehea_drop_multicast_list(dev);
1936		if (ret) {
1937			/* Dropping the current multicast list failed.
1938			 * Enabling ALL_MULTI is the best we can do.
1939			 */
1940			ehea_allmulti(dev, 1);
1941		}
1942
1943		if (netdev_mc_count(dev) > port->adapter->max_mc_mac) {
1944			pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n",
1945				port->adapter->max_mc_mac);
1946			goto out;
1947		}
1948
1949		netdev_for_each_mc_addr(ha, dev)
1950			ehea_add_multicast_entry(port, ha->addr);
1951
1952	}
1953out:
1954	ehea_update_bcmc_registrations();
1955}
1956
 
 
 
 
 
 
 
 
1957static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
1958{
1959	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
1960
1961	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1962		return;
1963
1964	if (skb->ip_summed == CHECKSUM_PARTIAL)
1965		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
1966
1967	swqe->ip_start = skb_network_offset(skb);
1968	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
1969
1970	switch (ip_hdr(skb)->protocol) {
1971	case IPPROTO_UDP:
1972		if (skb->ip_summed == CHECKSUM_PARTIAL)
1973			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1974
1975		swqe->tcp_offset = swqe->ip_end + 1 +
1976				   offsetof(struct udphdr, check);
1977		break;
1978
1979	case IPPROTO_TCP:
1980		if (skb->ip_summed == CHECKSUM_PARTIAL)
1981			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
1982
1983		swqe->tcp_offset = swqe->ip_end + 1 +
1984				   offsetof(struct tcphdr, check);
1985		break;
1986	}
1987}
1988
1989static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
1990		       struct ehea_swqe *swqe, u32 lkey)
1991{
1992	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
1993
1994	xmit_common(skb, swqe);
1995
1996	write_swqe2_data(skb, dev, swqe, lkey);
1997}
1998
1999static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
2000		       struct ehea_swqe *swqe)
2001{
2002	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
2003
2004	xmit_common(skb, swqe);
2005
2006	if (!skb->data_len)
2007		skb_copy_from_linear_data(skb, imm_data, skb->len);
2008	else
2009		skb_copy_bits(skb, 0, imm_data, skb->len);
2010
2011	swqe->immediate_data_length = skb->len;
2012	dev_consume_skb_any(skb);
2013}
2014
2015static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
2016{
2017	struct ehea_port *port = netdev_priv(dev);
2018	struct ehea_swqe *swqe;
2019	u32 lkey;
2020	int swqe_index;
2021	struct ehea_port_res *pr;
2022	struct netdev_queue *txq;
2023
2024	pr = &port->port_res[skb_get_queue_mapping(skb)];
2025	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2026
2027	swqe = ehea_get_swqe(pr->qp, &swqe_index);
2028	memset(swqe, 0, SWQE_HEADER_SIZE);
2029	atomic_dec(&pr->swqe_avail);
2030
2031	if (skb_vlan_tag_present(skb)) {
2032		swqe->tx_control |= EHEA_SWQE_VLAN_INSERT;
2033		swqe->vlan_tag = skb_vlan_tag_get(skb);
2034	}
2035
2036	pr->tx_packets++;
2037	pr->tx_bytes += skb->len;
2038
2039	if (skb->len <= SWQE3_MAX_IMM) {
2040		u32 sig_iv = port->sig_comp_iv;
2041		u32 swqe_num = pr->swqe_id_counter;
2042		ehea_xmit3(skb, dev, swqe);
2043		swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE)
2044			| EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num);
2045		if (pr->swqe_ll_count >= (sig_iv - 1)) {
2046			swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL,
2047						      sig_iv);
2048			swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2049			pr->swqe_ll_count = 0;
2050		} else
2051			pr->swqe_ll_count += 1;
2052	} else {
2053		swqe->wr_id =
2054			EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE)
2055		      | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter)
2056		      | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1)
2057		      | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index);
2058		pr->sq_skba.arr[pr->sq_skba.index] = skb;
2059
2060		pr->sq_skba.index++;
2061		pr->sq_skba.index &= (pr->sq_skba.len - 1);
2062
2063		lkey = pr->send_mr.lkey;
2064		ehea_xmit2(skb, dev, swqe, lkey);
2065		swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION;
2066	}
2067	pr->swqe_id_counter += 1;
2068
2069	netif_info(port, tx_queued, dev,
2070		   "post swqe on QP %d\n", pr->qp->init_attr.qp_nr);
2071	if (netif_msg_tx_queued(port))
2072		ehea_dump(swqe, 512, "swqe");
2073
2074	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
2075		netif_tx_stop_queue(txq);
2076		swqe->tx_control |= EHEA_SWQE_PURGE;
2077	}
2078
2079	ehea_post_swqe(pr->qp, swqe);
2080
2081	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
2082		pr->p_stats.queue_stopped++;
2083		netif_tx_stop_queue(txq);
2084	}
2085
2086	return NETDEV_TX_OK;
2087}
2088
2089static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
2090{
2091	struct ehea_port *port = netdev_priv(dev);
2092	struct ehea_adapter *adapter = port->adapter;
2093	struct hcp_ehea_port_cb1 *cb1;
2094	int index;
2095	u64 hret;
2096	int err = 0;
2097
2098	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2099	if (!cb1) {
2100		pr_err("no mem for cb1\n");
2101		err = -ENOMEM;
2102		goto out;
2103	}
2104
2105	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2106				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2107	if (hret != H_SUCCESS) {
2108		pr_err("query_ehea_port failed\n");
2109		err = -EINVAL;
2110		goto out;
2111	}
2112
2113	index = (vid / 64);
2114	cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F)));
2115
2116	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2117				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2118	if (hret != H_SUCCESS) {
2119		pr_err("modify_ehea_port failed\n");
2120		err = -EINVAL;
2121	}
2122out:
2123	free_page((unsigned long)cb1);
2124	return err;
2125}
2126
2127static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
2128{
2129	struct ehea_port *port = netdev_priv(dev);
2130	struct ehea_adapter *adapter = port->adapter;
2131	struct hcp_ehea_port_cb1 *cb1;
2132	int index;
2133	u64 hret;
2134	int err = 0;
2135
2136	cb1 = (void *)get_zeroed_page(GFP_KERNEL);
2137	if (!cb1) {
2138		pr_err("no mem for cb1\n");
2139		err = -ENOMEM;
2140		goto out;
2141	}
2142
2143	hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id,
2144				      H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2145	if (hret != H_SUCCESS) {
2146		pr_err("query_ehea_port failed\n");
2147		err = -EINVAL;
2148		goto out;
2149	}
2150
2151	index = (vid / 64);
2152	cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F)));
2153
2154	hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id,
2155				       H_PORT_CB1, H_PORT_CB1_ALL, cb1);
2156	if (hret != H_SUCCESS) {
2157		pr_err("modify_ehea_port failed\n");
2158		err = -EINVAL;
2159	}
2160out:
2161	free_page((unsigned long)cb1);
2162	return err;
2163}
2164
2165static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp)
2166{
2167	int ret = -EIO;
2168	u64 hret;
2169	u16 dummy16 = 0;
2170	u64 dummy64 = 0;
2171	struct hcp_modify_qp_cb0 *cb0;
2172
2173	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2174	if (!cb0) {
2175		ret = -ENOMEM;
2176		goto out;
2177	}
2178
2179	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2180				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2181	if (hret != H_SUCCESS) {
2182		pr_err("query_ehea_qp failed (1)\n");
2183		goto out;
2184	}
2185
2186	cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED;
2187	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2188				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2189				     &dummy64, &dummy64, &dummy16, &dummy16);
2190	if (hret != H_SUCCESS) {
2191		pr_err("modify_ehea_qp failed (1)\n");
2192		goto out;
2193	}
2194
2195	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2196				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2197	if (hret != H_SUCCESS) {
2198		pr_err("query_ehea_qp failed (2)\n");
2199		goto out;
2200	}
2201
2202	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED;
2203	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2204				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2205				     &dummy64, &dummy64, &dummy16, &dummy16);
2206	if (hret != H_SUCCESS) {
2207		pr_err("modify_ehea_qp failed (2)\n");
2208		goto out;
2209	}
2210
2211	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2212				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2213	if (hret != H_SUCCESS) {
2214		pr_err("query_ehea_qp failed (3)\n");
2215		goto out;
2216	}
2217
2218	cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND;
2219	hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2220				     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0,
2221				     &dummy64, &dummy64, &dummy16, &dummy16);
2222	if (hret != H_SUCCESS) {
2223		pr_err("modify_ehea_qp failed (3)\n");
2224		goto out;
2225	}
2226
2227	hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2228				    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0);
2229	if (hret != H_SUCCESS) {
2230		pr_err("query_ehea_qp failed (4)\n");
2231		goto out;
2232	}
2233
2234	ret = 0;
2235out:
2236	free_page((unsigned long)cb0);
2237	return ret;
2238}
2239
2240static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
2241{
2242	int ret, i;
2243	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
2244	enum ehea_eq_type eq_type = EHEA_EQ;
2245
2246	port->qp_eq = ehea_create_eq(port->adapter, eq_type,
2247				   EHEA_MAX_ENTRIES_EQ, 1);
2248	if (!port->qp_eq) {
2249		ret = -EINVAL;
2250		pr_err("ehea_create_eq failed (qp_eq)\n");
2251		goto out_kill_eq;
2252	}
2253
2254	pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries;
2255	pr_cfg.max_entries_scq = sq_entries * 2;
2256	pr_cfg.max_entries_sq = sq_entries;
2257	pr_cfg.max_entries_rq1 = rq1_entries;
2258	pr_cfg.max_entries_rq2 = rq2_entries;
2259	pr_cfg.max_entries_rq3 = rq3_entries;
2260
2261	pr_cfg_small_rx.max_entries_rcq = 1;
2262	pr_cfg_small_rx.max_entries_scq = sq_entries;
2263	pr_cfg_small_rx.max_entries_sq = sq_entries;
2264	pr_cfg_small_rx.max_entries_rq1 = 1;
2265	pr_cfg_small_rx.max_entries_rq2 = 1;
2266	pr_cfg_small_rx.max_entries_rq3 = 1;
2267
2268	for (i = 0; i < def_qps; i++) {
2269		ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i);
2270		if (ret)
2271			goto out_clean_pr;
2272	}
2273	for (i = def_qps; i < def_qps; i++) {
2274		ret = ehea_init_port_res(port, &port->port_res[i],
2275					 &pr_cfg_small_rx, i);
2276		if (ret)
2277			goto out_clean_pr;
2278	}
2279
2280	return 0;
2281
2282out_clean_pr:
2283	while (--i >= 0)
2284		ehea_clean_portres(port, &port->port_res[i]);
2285
2286out_kill_eq:
2287	ehea_destroy_eq(port->qp_eq);
2288	return ret;
2289}
2290
2291static int ehea_clean_all_portres(struct ehea_port *port)
2292{
2293	int ret = 0;
2294	int i;
2295
2296	for (i = 0; i < port->num_def_qps; i++)
2297		ret |= ehea_clean_portres(port, &port->port_res[i]);
2298
2299	ret |= ehea_destroy_eq(port->qp_eq);
2300
2301	return ret;
2302}
2303
2304static void ehea_remove_adapter_mr(struct ehea_adapter *adapter)
2305{
2306	if (adapter->active_ports)
2307		return;
2308
2309	ehea_rem_mr(&adapter->mr);
2310}
2311
2312static int ehea_add_adapter_mr(struct ehea_adapter *adapter)
2313{
2314	if (adapter->active_ports)
2315		return 0;
2316
2317	return ehea_reg_kernel_mr(adapter, &adapter->mr);
2318}
2319
2320static int ehea_up(struct net_device *dev)
2321{
2322	int ret, i;
2323	struct ehea_port *port = netdev_priv(dev);
2324
2325	if (port->state == EHEA_PORT_UP)
2326		return 0;
2327
2328	ret = ehea_port_res_setup(port, port->num_def_qps);
2329	if (ret) {
2330		netdev_err(dev, "port_res_failed\n");
2331		goto out;
2332	}
2333
2334	/* Set default QP for this port */
2335	ret = ehea_configure_port(port);
2336	if (ret) {
2337		netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret);
2338		goto out_clean_pr;
2339	}
2340
2341	ret = ehea_reg_interrupts(dev);
2342	if (ret) {
2343		netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret);
2344		goto out_clean_pr;
2345	}
2346
2347	for (i = 0; i < port->num_def_qps; i++) {
2348		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
2349		if (ret) {
2350			netdev_err(dev, "activate_qp failed\n");
2351			goto out_free_irqs;
2352		}
2353	}
2354
2355	for (i = 0; i < port->num_def_qps; i++) {
2356		ret = ehea_fill_port_res(&port->port_res[i]);
2357		if (ret) {
2358			netdev_err(dev, "out_free_irqs\n");
2359			goto out_free_irqs;
2360		}
2361	}
2362
2363	ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
2364	if (ret) {
2365		ret = -EIO;
2366		goto out_free_irqs;
2367	}
2368
2369	port->state = EHEA_PORT_UP;
2370
2371	ret = 0;
2372	goto out;
2373
2374out_free_irqs:
2375	ehea_free_interrupts(dev);
2376
2377out_clean_pr:
2378	ehea_clean_all_portres(port);
2379out:
2380	if (ret)
2381		netdev_info(dev, "Failed starting. ret=%i\n", ret);
2382
2383	ehea_update_bcmc_registrations();
2384	ehea_update_firmware_handles();
2385
2386	return ret;
2387}
2388
2389static void port_napi_disable(struct ehea_port *port)
2390{
2391	int i;
2392
2393	for (i = 0; i < port->num_def_qps; i++)
2394		napi_disable(&port->port_res[i].napi);
2395}
2396
2397static void port_napi_enable(struct ehea_port *port)
2398{
2399	int i;
2400
2401	for (i = 0; i < port->num_def_qps; i++)
2402		napi_enable(&port->port_res[i].napi);
2403}
2404
2405static int ehea_open(struct net_device *dev)
2406{
2407	int ret;
2408	struct ehea_port *port = netdev_priv(dev);
2409
2410	mutex_lock(&port->port_lock);
2411
2412	netif_info(port, ifup, dev, "enabling port\n");
2413
2414	netif_carrier_off(dev);
2415
2416	ret = ehea_up(dev);
2417	if (!ret) {
2418		port_napi_enable(port);
2419		netif_tx_start_all_queues(dev);
2420	}
2421
2422	mutex_unlock(&port->port_lock);
2423	schedule_delayed_work(&port->stats_work,
2424			      round_jiffies_relative(msecs_to_jiffies(1000)));
2425
2426	return ret;
2427}
2428
2429static int ehea_down(struct net_device *dev)
2430{
2431	int ret;
2432	struct ehea_port *port = netdev_priv(dev);
2433
2434	if (port->state == EHEA_PORT_DOWN)
2435		return 0;
2436
2437	ehea_drop_multicast_list(dev);
2438	ehea_allmulti(dev, 0);
2439	ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
2440
2441	ehea_free_interrupts(dev);
2442
2443	port->state = EHEA_PORT_DOWN;
2444
2445	ehea_update_bcmc_registrations();
2446
2447	ret = ehea_clean_all_portres(port);
2448	if (ret)
2449		netdev_info(dev, "Failed freeing resources. ret=%i\n", ret);
2450
2451	ehea_update_firmware_handles();
2452
2453	return ret;
2454}
2455
2456static int ehea_stop(struct net_device *dev)
2457{
2458	int ret;
2459	struct ehea_port *port = netdev_priv(dev);
2460
2461	netif_info(port, ifdown, dev, "disabling port\n");
2462
2463	set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2464	cancel_work_sync(&port->reset_task);
2465	cancel_delayed_work_sync(&port->stats_work);
2466	mutex_lock(&port->port_lock);
2467	netif_tx_stop_all_queues(dev);
2468	port_napi_disable(port);
2469	ret = ehea_down(dev);
2470	mutex_unlock(&port->port_lock);
2471	clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags);
2472	return ret;
2473}
2474
2475static void ehea_purge_sq(struct ehea_qp *orig_qp)
2476{
2477	struct ehea_qp qp = *orig_qp;
2478	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2479	struct ehea_swqe *swqe;
2480	int wqe_index;
2481	int i;
2482
2483	for (i = 0; i < init_attr->act_nr_send_wqes; i++) {
2484		swqe = ehea_get_swqe(&qp, &wqe_index);
2485		swqe->tx_control |= EHEA_SWQE_PURGE;
2486	}
2487}
2488
2489static void ehea_flush_sq(struct ehea_port *port)
2490{
2491	int i;
2492
2493	for (i = 0; i < port->num_def_qps; i++) {
2494		struct ehea_port_res *pr = &port->port_res[i];
2495		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
2496		int ret;
2497
2498		ret = wait_event_timeout(port->swqe_avail_wq,
2499			 atomic_read(&pr->swqe_avail) >= swqe_max,
2500			 msecs_to_jiffies(100));
2501
2502		if (!ret) {
2503			pr_err("WARNING: sq not flushed completely\n");
2504			break;
2505		}
2506	}
2507}
2508
2509static int ehea_stop_qps(struct net_device *dev)
2510{
2511	struct ehea_port *port = netdev_priv(dev);
2512	struct ehea_adapter *adapter = port->adapter;
2513	struct hcp_modify_qp_cb0 *cb0;
2514	int ret = -EIO;
2515	int dret;
2516	int i;
2517	u64 hret;
2518	u64 dummy64 = 0;
2519	u16 dummy16 = 0;
2520
2521	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2522	if (!cb0) {
2523		ret = -ENOMEM;
2524		goto out;
2525	}
2526
2527	for (i = 0; i < (port->num_def_qps); i++) {
2528		struct ehea_port_res *pr =  &port->port_res[i];
2529		struct ehea_qp *qp = pr->qp;
2530
2531		/* Purge send queue */
2532		ehea_purge_sq(qp);
2533
2534		/* Disable queue pair */
2535		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2536					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2537					    cb0);
2538		if (hret != H_SUCCESS) {
2539			pr_err("query_ehea_qp failed (1)\n");
2540			goto out;
2541		}
2542
2543		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2544		cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED;
2545
2546		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2547					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2548							    1), cb0, &dummy64,
2549					     &dummy64, &dummy16, &dummy16);
2550		if (hret != H_SUCCESS) {
2551			pr_err("modify_ehea_qp failed (1)\n");
2552			goto out;
2553		}
2554
2555		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2556					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2557					    cb0);
2558		if (hret != H_SUCCESS) {
2559			pr_err("query_ehea_qp failed (2)\n");
2560			goto out;
2561		}
2562
2563		/* deregister shared memory regions */
2564		dret = ehea_rem_smrs(pr);
2565		if (dret) {
2566			pr_err("unreg shared memory region failed\n");
2567			goto out;
2568		}
2569	}
2570
2571	ret = 0;
2572out:
2573	free_page((unsigned long)cb0);
2574
2575	return ret;
2576}
2577
2578static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr)
2579{
2580	struct ehea_qp qp = *orig_qp;
2581	struct ehea_qp_init_attr *init_attr = &qp.init_attr;
2582	struct ehea_rwqe *rwqe;
2583	struct sk_buff **skba_rq2 = pr->rq2_skba.arr;
2584	struct sk_buff **skba_rq3 = pr->rq3_skba.arr;
2585	struct sk_buff *skb;
2586	u32 lkey = pr->recv_mr.lkey;
2587
2588
2589	int i;
2590	int index;
2591
2592	for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) {
2593		rwqe = ehea_get_next_rwqe(&qp, 2);
2594		rwqe->sg_list[0].l_key = lkey;
2595		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2596		skb = skba_rq2[index];
2597		if (skb)
2598			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2599	}
2600
2601	for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) {
2602		rwqe = ehea_get_next_rwqe(&qp, 3);
2603		rwqe->sg_list[0].l_key = lkey;
2604		index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id);
2605		skb = skba_rq3[index];
2606		if (skb)
2607			rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data);
2608	}
2609}
2610
2611static int ehea_restart_qps(struct net_device *dev)
2612{
2613	struct ehea_port *port = netdev_priv(dev);
2614	struct ehea_adapter *adapter = port->adapter;
2615	int ret = 0;
2616	int i;
2617
2618	struct hcp_modify_qp_cb0 *cb0;
2619	u64 hret;
2620	u64 dummy64 = 0;
2621	u16 dummy16 = 0;
2622
2623	cb0 = (void *)get_zeroed_page(GFP_KERNEL);
2624	if (!cb0)
2625		return -ENOMEM;
 
 
2626
2627	for (i = 0; i < (port->num_def_qps); i++) {
2628		struct ehea_port_res *pr =  &port->port_res[i];
2629		struct ehea_qp *qp = pr->qp;
2630
2631		ret = ehea_gen_smrs(pr);
2632		if (ret) {
2633			netdev_err(dev, "creation of shared memory regions failed\n");
2634			goto out;
2635		}
2636
2637		ehea_update_rqs(qp, pr);
2638
2639		/* Enable queue pair */
2640		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2641					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2642					    cb0);
2643		if (hret != H_SUCCESS) {
2644			netdev_err(dev, "query_ehea_qp failed (1)\n");
2645			ret = -EFAULT;
2646			goto out;
2647		}
2648
2649		cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8;
2650		cb0->qp_ctl_reg |= H_QP_CR_ENABLED;
2651
2652		hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle,
2653					     EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG,
2654							    1), cb0, &dummy64,
2655					     &dummy64, &dummy16, &dummy16);
2656		if (hret != H_SUCCESS) {
2657			netdev_err(dev, "modify_ehea_qp failed (1)\n");
2658			ret = -EFAULT;
2659			goto out;
2660		}
2661
2662		hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle,
2663					    EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF),
2664					    cb0);
2665		if (hret != H_SUCCESS) {
2666			netdev_err(dev, "query_ehea_qp failed (2)\n");
2667			ret = -EFAULT;
2668			goto out;
2669		}
2670
2671		/* refill entire queue */
2672		ehea_refill_rq1(pr, pr->rq1_skba.index, 0);
2673		ehea_refill_rq2(pr, 0);
2674		ehea_refill_rq3(pr, 0);
2675	}
2676out:
2677	free_page((unsigned long)cb0);
2678
2679	return ret;
2680}
2681
2682static void ehea_reset_port(struct work_struct *work)
2683{
2684	int ret;
2685	struct ehea_port *port =
2686		container_of(work, struct ehea_port, reset_task);
2687	struct net_device *dev = port->netdev;
2688
2689	mutex_lock(&dlpar_mem_lock);
2690	port->resets++;
2691	mutex_lock(&port->port_lock);
2692	netif_tx_disable(dev);
2693
2694	port_napi_disable(port);
2695
2696	ehea_down(dev);
2697
2698	ret = ehea_up(dev);
2699	if (ret)
2700		goto out;
2701
2702	ehea_set_multicast_list(dev);
2703
2704	netif_info(port, timer, dev, "reset successful\n");
2705
2706	port_napi_enable(port);
2707
2708	netif_tx_wake_all_queues(dev);
2709out:
2710	mutex_unlock(&port->port_lock);
2711	mutex_unlock(&dlpar_mem_lock);
2712}
2713
2714static void ehea_rereg_mrs(void)
2715{
2716	int ret, i;
2717	struct ehea_adapter *adapter;
2718
2719	pr_info("LPAR memory changed - re-initializing driver\n");
2720
2721	list_for_each_entry(adapter, &adapter_list, list)
2722		if (adapter->active_ports) {
2723			/* Shutdown all ports */
2724			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2725				struct ehea_port *port = adapter->port[i];
2726				struct net_device *dev;
2727
2728				if (!port)
2729					continue;
2730
2731				dev = port->netdev;
2732
2733				if (dev->flags & IFF_UP) {
2734					mutex_lock(&port->port_lock);
2735					netif_tx_disable(dev);
2736					ehea_flush_sq(port);
2737					ret = ehea_stop_qps(dev);
2738					if (ret) {
2739						mutex_unlock(&port->port_lock);
2740						goto out;
2741					}
2742					port_napi_disable(port);
2743					mutex_unlock(&port->port_lock);
2744				}
2745				reset_sq_restart_flag(port);
2746			}
2747
2748			/* Unregister old memory region */
2749			ret = ehea_rem_mr(&adapter->mr);
2750			if (ret) {
2751				pr_err("unregister MR failed - driver inoperable!\n");
2752				goto out;
2753			}
2754		}
2755
2756	clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
2757
2758	list_for_each_entry(adapter, &adapter_list, list)
2759		if (adapter->active_ports) {
2760			/* Register new memory region */
2761			ret = ehea_reg_kernel_mr(adapter, &adapter->mr);
2762			if (ret) {
2763				pr_err("register MR failed - driver inoperable!\n");
2764				goto out;
2765			}
2766
2767			/* Restart all ports */
2768			for (i = 0; i < EHEA_MAX_PORTS; i++) {
2769				struct ehea_port *port = adapter->port[i];
2770
2771				if (port) {
2772					struct net_device *dev = port->netdev;
2773
2774					if (dev->flags & IFF_UP) {
2775						mutex_lock(&port->port_lock);
2776						ret = ehea_restart_qps(dev);
2777						if (!ret) {
2778							check_sqs(port);
2779							port_napi_enable(port);
2780							netif_tx_wake_all_queues(dev);
2781						} else {
2782							netdev_err(dev, "Unable to restart QPS\n");
2783						}
2784						mutex_unlock(&port->port_lock);
2785					}
2786				}
2787			}
2788		}
2789	pr_info("re-initializing driver complete\n");
2790out:
2791	return;
2792}
2793
2794static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue)
2795{
2796	struct ehea_port *port = netdev_priv(dev);
2797
2798	if (netif_carrier_ok(dev) &&
2799	    !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))
2800		ehea_schedule_port_reset(port);
2801}
2802
2803static int ehea_sense_adapter_attr(struct ehea_adapter *adapter)
2804{
2805	struct hcp_query_ehea *cb;
2806	u64 hret;
2807	int ret;
2808
2809	cb = (void *)get_zeroed_page(GFP_KERNEL);
2810	if (!cb) {
2811		ret = -ENOMEM;
2812		goto out;
2813	}
2814
2815	hret = ehea_h_query_ehea(adapter->handle, cb);
2816
2817	if (hret != H_SUCCESS) {
2818		ret = -EIO;
2819		goto out_herr;
2820	}
2821
2822	adapter->max_mc_mac = cb->max_mc_mac - 1;
2823	ret = 0;
2824
2825out_herr:
2826	free_page((unsigned long)cb);
2827out:
2828	return ret;
2829}
2830
2831static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo)
2832{
2833	struct hcp_ehea_port_cb4 *cb4;
2834	u64 hret;
2835	int ret = 0;
2836
2837	*jumbo = 0;
2838
2839	/* (Try to) enable *jumbo frames */
2840	cb4 = (void *)get_zeroed_page(GFP_KERNEL);
2841	if (!cb4) {
2842		pr_err("no mem for cb4\n");
2843		ret = -ENOMEM;
2844		goto out;
2845	} else {
2846		hret = ehea_h_query_ehea_port(port->adapter->handle,
2847					      port->logical_port_id,
2848					      H_PORT_CB4,
2849					      H_PORT_CB4_JUMBO, cb4);
2850		if (hret == H_SUCCESS) {
2851			if (cb4->jumbo_frame)
2852				*jumbo = 1;
2853			else {
2854				cb4->jumbo_frame = 1;
2855				hret = ehea_h_modify_ehea_port(port->adapter->
2856							       handle,
2857							       port->
2858							       logical_port_id,
2859							       H_PORT_CB4,
2860							       H_PORT_CB4_JUMBO,
2861							       cb4);
2862				if (hret == H_SUCCESS)
2863					*jumbo = 1;
2864			}
2865		} else
2866			ret = -EINVAL;
2867
2868		free_page((unsigned long)cb4);
2869	}
2870out:
2871	return ret;
2872}
2873
2874static ssize_t log_port_id_show(struct device *dev,
2875				struct device_attribute *attr, char *buf)
2876{
2877	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2878	return sprintf(buf, "%d", port->logical_port_id);
2879}
2880
2881static DEVICE_ATTR_RO(log_port_id);
 
2882
2883static void logical_port_release(struct device *dev)
2884{
2885	struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev);
2886	of_node_put(port->ofdev.dev.of_node);
2887}
2888
2889static struct device *ehea_register_port(struct ehea_port *port,
2890					 struct device_node *dn)
2891{
2892	int ret;
2893
2894	port->ofdev.dev.of_node = of_node_get(dn);
2895	port->ofdev.dev.parent = &port->adapter->ofdev->dev;
2896	port->ofdev.dev.bus = &ibmebus_bus_type;
2897
2898	dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++);
2899	port->ofdev.dev.release = logical_port_release;
2900
2901	ret = of_device_register(&port->ofdev);
2902	if (ret) {
2903		pr_err("failed to register device. ret=%d\n", ret);
2904		put_device(&port->ofdev.dev);
2905		goto out;
2906	}
2907
2908	ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id);
2909	if (ret) {
2910		pr_err("failed to register attributes, ret=%d\n", ret);
2911		goto out_unreg_of_dev;
2912	}
2913
2914	return &port->ofdev.dev;
2915
2916out_unreg_of_dev:
2917	of_device_unregister(&port->ofdev);
2918out:
2919	return NULL;
2920}
2921
2922static void ehea_unregister_port(struct ehea_port *port)
2923{
2924	device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id);
2925	of_device_unregister(&port->ofdev);
2926}
2927
2928static const struct net_device_ops ehea_netdev_ops = {
2929	.ndo_open		= ehea_open,
2930	.ndo_stop		= ehea_stop,
2931	.ndo_start_xmit		= ehea_start_xmit,
 
 
 
2932	.ndo_get_stats64	= ehea_get_stats64,
2933	.ndo_set_mac_address	= ehea_set_mac_addr,
2934	.ndo_validate_addr	= eth_validate_addr,
2935	.ndo_set_rx_mode	= ehea_set_multicast_list,
 
2936	.ndo_vlan_rx_add_vid	= ehea_vlan_rx_add_vid,
2937	.ndo_vlan_rx_kill_vid	= ehea_vlan_rx_kill_vid,
2938	.ndo_tx_timeout		= ehea_tx_watchdog,
2939};
2940
2941static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
2942					 u32 logical_port_id,
2943					 struct device_node *dn)
2944{
2945	int ret;
2946	struct net_device *dev;
2947	struct ehea_port *port;
2948	struct device *port_dev;
2949	int jumbo;
2950
2951	/* allocate memory for the port structures */
2952	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
2953
2954	if (!dev) {
2955		ret = -ENOMEM;
2956		goto out_err;
2957	}
2958
2959	port = netdev_priv(dev);
2960
2961	mutex_init(&port->port_lock);
2962	port->state = EHEA_PORT_DOWN;
2963	port->sig_comp_iv = sq_entries / 10;
2964
2965	port->adapter = adapter;
2966	port->netdev = dev;
2967	port->logical_port_id = logical_port_id;
2968
2969	port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT);
2970
2971	port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL);
2972	if (!port->mc_list) {
2973		ret = -ENOMEM;
2974		goto out_free_ethdev;
2975	}
2976
2977	INIT_LIST_HEAD(&port->mc_list->list);
2978
2979	ret = ehea_sense_port_attr(port);
2980	if (ret)
2981		goto out_free_mc_list;
2982
2983	netif_set_real_num_rx_queues(dev, port->num_def_qps);
2984	netif_set_real_num_tx_queues(dev, port->num_def_qps);
2985
2986	port_dev = ehea_register_port(port, dn);
2987	if (!port_dev)
2988		goto out_free_mc_list;
2989
2990	SET_NETDEV_DEV(dev, port_dev);
2991
2992	/* initialize net_device structure */
2993	eth_hw_addr_set(dev, (u8 *)&port->mac_addr);
2994
2995	dev->netdev_ops = &ehea_netdev_ops;
2996	ehea_set_ethtool_ops(dev);
2997
2998	dev->hw_features = NETIF_F_SG | NETIF_F_TSO |
2999		      NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX;
3000	dev->features = NETIF_F_SG | NETIF_F_TSO |
3001		      NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
3002		      NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
3003		      NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM;
3004	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
3005			NETIF_F_IP_CSUM;
3006	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
3007
3008	/* MTU range: 68 - 9022 */
3009	dev->min_mtu = ETH_MIN_MTU;
3010	dev->max_mtu = EHEA_MAX_PACKET_SIZE;
3011
3012	INIT_WORK(&port->reset_task, ehea_reset_port);
3013	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
3014
3015	init_waitqueue_head(&port->swqe_avail_wq);
3016	init_waitqueue_head(&port->restart_wq);
3017
 
3018	ret = register_netdev(dev);
3019	if (ret) {
3020		pr_err("register_netdev failed. ret=%d\n", ret);
3021		goto out_unreg_port;
3022	}
3023
3024	ret = ehea_get_jumboframe_status(port, &jumbo);
3025	if (ret)
3026		netdev_err(dev, "failed determining jumbo frame status\n");
3027
3028	netdev_info(dev, "Jumbo frames are %sabled\n",
3029		    jumbo == 1 ? "en" : "dis");
3030
3031	adapter->active_ports++;
3032
3033	return port;
3034
3035out_unreg_port:
3036	ehea_unregister_port(port);
3037
3038out_free_mc_list:
3039	kfree(port->mc_list);
3040
3041out_free_ethdev:
3042	free_netdev(dev);
3043
3044out_err:
3045	pr_err("setting up logical port with id=%d failed, ret=%d\n",
3046	       logical_port_id, ret);
3047	return NULL;
3048}
3049
3050static void ehea_shutdown_single_port(struct ehea_port *port)
3051{
3052	struct ehea_adapter *adapter = port->adapter;
3053
3054	cancel_work_sync(&port->reset_task);
3055	cancel_delayed_work_sync(&port->stats_work);
3056	unregister_netdev(port->netdev);
3057	ehea_unregister_port(port);
3058	kfree(port->mc_list);
3059	free_netdev(port->netdev);
3060	adapter->active_ports--;
3061}
3062
3063static int ehea_setup_ports(struct ehea_adapter *adapter)
3064{
3065	struct device_node *lhea_dn;
3066	struct device_node *eth_dn = NULL;
3067
3068	const u32 *dn_log_port_id;
3069	int i = 0;
3070
3071	lhea_dn = adapter->ofdev->dev.of_node;
3072	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3073
3074		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3075						 NULL);
3076		if (!dn_log_port_id) {
3077			pr_err("bad device node: eth_dn name=%pOF\n", eth_dn);
 
3078			continue;
3079		}
3080
3081		if (ehea_add_adapter_mr(adapter)) {
3082			pr_err("creating MR failed\n");
3083			of_node_put(eth_dn);
3084			return -EIO;
3085		}
3086
3087		adapter->port[i] = ehea_setup_single_port(adapter,
3088							  *dn_log_port_id,
3089							  eth_dn);
3090		if (adapter->port[i])
3091			netdev_info(adapter->port[i]->netdev,
3092				    "logical port id #%d\n", *dn_log_port_id);
3093		else
3094			ehea_remove_adapter_mr(adapter);
3095
3096		i++;
3097	}
3098	return 0;
3099}
3100
3101static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter,
3102					   u32 logical_port_id)
3103{
3104	struct device_node *lhea_dn;
3105	struct device_node *eth_dn = NULL;
3106	const u32 *dn_log_port_id;
3107
3108	lhea_dn = adapter->ofdev->dev.of_node;
3109	while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) {
3110
3111		dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no",
3112						 NULL);
3113		if (dn_log_port_id)
3114			if (*dn_log_port_id == logical_port_id)
3115				return eth_dn;
3116	}
3117
3118	return NULL;
3119}
3120
3121static ssize_t probe_port_store(struct device *dev,
3122			       struct device_attribute *attr,
3123			       const char *buf, size_t count)
3124{
3125	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3126	struct ehea_port *port;
3127	struct device_node *eth_dn = NULL;
3128	int i;
3129
3130	u32 logical_port_id;
3131
3132	sscanf(buf, "%d", &logical_port_id);
3133
3134	port = ehea_get_port(adapter, logical_port_id);
3135
3136	if (port) {
3137		netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n",
3138			    logical_port_id);
3139		return -EINVAL;
3140	}
3141
3142	eth_dn = ehea_get_eth_dn(adapter, logical_port_id);
3143
3144	if (!eth_dn) {
3145		pr_info("no logical port with id %d found\n", logical_port_id);
3146		return -EINVAL;
3147	}
3148
3149	if (ehea_add_adapter_mr(adapter)) {
3150		pr_err("creating MR failed\n");
3151		of_node_put(eth_dn);
3152		return -EIO;
3153	}
3154
3155	port = ehea_setup_single_port(adapter, logical_port_id, eth_dn);
3156
3157	of_node_put(eth_dn);
3158
3159	if (port) {
3160		for (i = 0; i < EHEA_MAX_PORTS; i++)
3161			if (!adapter->port[i]) {
3162				adapter->port[i] = port;
3163				break;
3164			}
3165
3166		netdev_info(port->netdev, "added: (logical port id=%d)\n",
3167			    logical_port_id);
3168	} else {
3169		ehea_remove_adapter_mr(adapter);
3170		return -EIO;
3171	}
3172
3173	return (ssize_t) count;
3174}
3175
3176static ssize_t remove_port_store(struct device *dev,
3177				 struct device_attribute *attr,
3178				 const char *buf, size_t count)
3179{
3180	struct ehea_adapter *adapter = dev_get_drvdata(dev);
3181	struct ehea_port *port;
3182	int i;
3183	u32 logical_port_id;
3184
3185	sscanf(buf, "%d", &logical_port_id);
3186
3187	port = ehea_get_port(adapter, logical_port_id);
3188
3189	if (port) {
3190		netdev_info(port->netdev, "removed: (logical port id=%d)\n",
3191			    logical_port_id);
3192
3193		ehea_shutdown_single_port(port);
3194
3195		for (i = 0; i < EHEA_MAX_PORTS; i++)
3196			if (adapter->port[i] == port) {
3197				adapter->port[i] = NULL;
3198				break;
3199			}
3200	} else {
3201		pr_err("removing port with logical port id=%d failed. port not configured.\n",
3202		       logical_port_id);
3203		return -EINVAL;
3204	}
3205
3206	ehea_remove_adapter_mr(adapter);
3207
3208	return (ssize_t) count;
3209}
3210
3211static DEVICE_ATTR_WO(probe_port);
3212static DEVICE_ATTR_WO(remove_port);
3213
3214static int ehea_create_device_sysfs(struct platform_device *dev)
3215{
3216	int ret = device_create_file(&dev->dev, &dev_attr_probe_port);
3217	if (ret)
3218		goto out;
3219
3220	ret = device_create_file(&dev->dev, &dev_attr_remove_port);
3221out:
3222	return ret;
3223}
3224
3225static void ehea_remove_device_sysfs(struct platform_device *dev)
3226{
3227	device_remove_file(&dev->dev, &dev_attr_probe_port);
3228	device_remove_file(&dev->dev, &dev_attr_remove_port);
3229}
3230
3231static int ehea_reboot_notifier(struct notifier_block *nb,
3232				unsigned long action, void *unused)
3233{
3234	if (action == SYS_RESTART) {
3235		pr_info("Reboot: freeing all eHEA resources\n");
3236		ibmebus_unregister_driver(&ehea_driver);
3237	}
3238	return NOTIFY_DONE;
3239}
3240
3241static struct notifier_block ehea_reboot_nb = {
3242	.notifier_call = ehea_reboot_notifier,
3243};
3244
3245static int ehea_mem_notifier(struct notifier_block *nb,
3246			     unsigned long action, void *data)
3247{
3248	int ret = NOTIFY_BAD;
3249	struct memory_notify *arg = data;
3250
3251	mutex_lock(&dlpar_mem_lock);
3252
3253	switch (action) {
3254	case MEM_CANCEL_OFFLINE:
3255		pr_info("memory offlining canceled");
3256		fallthrough;	/* re-add canceled memory block */
3257
3258	case MEM_ONLINE:
3259		pr_info("memory is going online");
3260		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3261		if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages))
3262			goto out_unlock;
3263		ehea_rereg_mrs();
3264		break;
3265
3266	case MEM_GOING_OFFLINE:
3267		pr_info("memory is going offline");
3268		set_bit(__EHEA_STOP_XFER, &ehea_driver_flags);
3269		if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages))
3270			goto out_unlock;
3271		ehea_rereg_mrs();
3272		break;
3273
3274	default:
3275		break;
3276	}
3277
3278	ehea_update_firmware_handles();
3279	ret = NOTIFY_OK;
3280
3281out_unlock:
3282	mutex_unlock(&dlpar_mem_lock);
3283	return ret;
3284}
3285
3286static struct notifier_block ehea_mem_nb = {
3287	.notifier_call = ehea_mem_notifier,
3288};
3289
3290static void ehea_crash_handler(void)
3291{
3292	int i;
3293
3294	if (ehea_fw_handles.arr)
3295		for (i = 0; i < ehea_fw_handles.num_entries; i++)
3296			ehea_h_free_resource(ehea_fw_handles.arr[i].adh,
3297					     ehea_fw_handles.arr[i].fwh,
3298					     FORCE_FREE);
3299
3300	if (ehea_bcmc_regs.arr)
3301		for (i = 0; i < ehea_bcmc_regs.num_entries; i++)
3302			ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh,
3303					      ehea_bcmc_regs.arr[i].port_id,
3304					      ehea_bcmc_regs.arr[i].reg_type,
3305					      ehea_bcmc_regs.arr[i].macaddr,
3306					      0, H_DEREG_BCMC);
3307}
3308
3309static atomic_t ehea_memory_hooks_registered;
3310
3311/* Register memory hooks on probe of first adapter */
3312static int ehea_register_memory_hooks(void)
3313{
3314	int ret = 0;
3315
3316	if (atomic_inc_return(&ehea_memory_hooks_registered) > 1)
3317		return 0;
3318
3319	ret = ehea_create_busmap();
3320	if (ret) {
3321		pr_info("ehea_create_busmap failed\n");
3322		goto out;
3323	}
3324
3325	ret = register_reboot_notifier(&ehea_reboot_nb);
3326	if (ret) {
3327		pr_info("register_reboot_notifier failed\n");
3328		goto out;
3329	}
3330
3331	ret = register_memory_notifier(&ehea_mem_nb);
3332	if (ret) {
3333		pr_info("register_memory_notifier failed\n");
3334		goto out2;
3335	}
3336
3337	ret = crash_shutdown_register(ehea_crash_handler);
3338	if (ret) {
3339		pr_info("crash_shutdown_register failed\n");
3340		goto out3;
3341	}
3342
3343	return 0;
3344
3345out3:
3346	unregister_memory_notifier(&ehea_mem_nb);
3347out2:
3348	unregister_reboot_notifier(&ehea_reboot_nb);
3349out:
3350	atomic_dec(&ehea_memory_hooks_registered);
3351	return ret;
3352}
3353
3354static void ehea_unregister_memory_hooks(void)
3355{
3356	/* Only remove the hooks if we've registered them */
3357	if (atomic_read(&ehea_memory_hooks_registered) == 0)
3358		return;
3359
3360	unregister_reboot_notifier(&ehea_reboot_nb);
3361	if (crash_shutdown_unregister(ehea_crash_handler))
3362		pr_info("failed unregistering crash handler\n");
3363	unregister_memory_notifier(&ehea_mem_nb);
3364}
3365
3366static int ehea_probe_adapter(struct platform_device *dev)
3367{
3368	struct ehea_adapter *adapter;
3369	const u64 *adapter_handle;
3370	int ret;
3371	int i;
3372
3373	ret = ehea_register_memory_hooks();
3374	if (ret)
3375		return ret;
3376
3377	if (!dev || !dev->dev.of_node) {
3378		pr_err("Invalid ibmebus device probed\n");
3379		return -EINVAL;
3380	}
3381
3382	adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL);
3383	if (!adapter) {
3384		ret = -ENOMEM;
3385		dev_err(&dev->dev, "no mem for ehea_adapter\n");
3386		goto out;
3387	}
3388
3389	list_add(&adapter->list, &adapter_list);
3390
3391	adapter->ofdev = dev;
3392
3393	adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle",
3394					 NULL);
3395	if (adapter_handle)
3396		adapter->handle = *adapter_handle;
3397
3398	if (!adapter->handle) {
3399		dev_err(&dev->dev, "failed getting handle for adapter"
3400			" '%pOF'\n", dev->dev.of_node);
3401		ret = -ENODEV;
3402		goto out_free_ad;
3403	}
3404
3405	adapter->pd = EHEA_PD_ID;
3406
3407	platform_set_drvdata(dev, adapter);
3408
3409
3410	/* initialize adapter and ports */
3411	/* get adapter properties */
3412	ret = ehea_sense_adapter_attr(adapter);
3413	if (ret) {
3414		dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret);
3415		goto out_free_ad;
3416	}
3417
3418	adapter->neq = ehea_create_eq(adapter,
3419				      EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1);
3420	if (!adapter->neq) {
3421		ret = -EIO;
3422		dev_err(&dev->dev, "NEQ creation failed\n");
3423		goto out_free_ad;
3424	}
3425
3426	tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet);
 
3427
3428	ret = ehea_create_device_sysfs(dev);
3429	if (ret)
3430		goto out_kill_eq;
3431
3432	ret = ehea_setup_ports(adapter);
3433	if (ret) {
3434		dev_err(&dev->dev, "setup_ports failed\n");
3435		goto out_rem_dev_sysfs;
3436	}
3437
3438	ret = ibmebus_request_irq(adapter->neq->attr.ist1,
3439				  ehea_interrupt_neq, 0,
3440				  "ehea_neq", adapter);
3441	if (ret) {
3442		dev_err(&dev->dev, "requesting NEQ IRQ failed\n");
3443		goto out_shutdown_ports;
3444	}
3445
3446	/* Handle any events that might be pending. */
3447	tasklet_hi_schedule(&adapter->neq_tasklet);
3448
3449	ret = 0;
3450	goto out;
3451
3452out_shutdown_ports:
3453	for (i = 0; i < EHEA_MAX_PORTS; i++)
3454		if (adapter->port[i]) {
3455			ehea_shutdown_single_port(adapter->port[i]);
3456			adapter->port[i] = NULL;
3457		}
3458
3459out_rem_dev_sysfs:
3460	ehea_remove_device_sysfs(dev);
3461
3462out_kill_eq:
3463	ehea_destroy_eq(adapter->neq);
3464
3465out_free_ad:
3466	list_del(&adapter->list);
 
3467
3468out:
3469	ehea_update_firmware_handles();
3470
3471	return ret;
3472}
3473
3474static void ehea_remove(struct platform_device *dev)
3475{
3476	struct ehea_adapter *adapter = platform_get_drvdata(dev);
3477	int i;
3478
3479	for (i = 0; i < EHEA_MAX_PORTS; i++)
3480		if (adapter->port[i]) {
3481			ehea_shutdown_single_port(adapter->port[i]);
3482			adapter->port[i] = NULL;
3483		}
3484
3485	ehea_remove_device_sysfs(dev);
3486
3487	ibmebus_free_irq(adapter->neq->attr.ist1, adapter);
3488	tasklet_kill(&adapter->neq_tasklet);
3489
3490	ehea_destroy_eq(adapter->neq);
3491	ehea_remove_adapter_mr(adapter);
3492	list_del(&adapter->list);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3493
3494	ehea_update_firmware_handles();
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3495}
3496
 
 
 
 
3497static int check_module_parm(void)
3498{
3499	int ret = 0;
3500
3501	if ((rq1_entries < EHEA_MIN_ENTRIES_QP) ||
3502	    (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) {
3503		pr_info("Bad parameter: rq1_entries\n");
3504		ret = -EINVAL;
3505	}
3506	if ((rq2_entries < EHEA_MIN_ENTRIES_QP) ||
3507	    (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) {
3508		pr_info("Bad parameter: rq2_entries\n");
3509		ret = -EINVAL;
3510	}
3511	if ((rq3_entries < EHEA_MIN_ENTRIES_QP) ||
3512	    (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) {
3513		pr_info("Bad parameter: rq3_entries\n");
3514		ret = -EINVAL;
3515	}
3516	if ((sq_entries < EHEA_MIN_ENTRIES_QP) ||
3517	    (sq_entries > EHEA_MAX_ENTRIES_SQ)) {
3518		pr_info("Bad parameter: sq_entries\n");
3519		ret = -EINVAL;
3520	}
3521
3522	return ret;
3523}
3524
3525static ssize_t capabilities_show(struct device_driver *drv, char *buf)
 
3526{
3527	return sprintf(buf, "%d", EHEA_CAPABILITIES);
3528}
3529
3530static DRIVER_ATTR_RO(capabilities);
 
3531
3532static int __init ehea_module_init(void)
3533{
3534	int ret;
3535
3536	pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION);
3537
3538	memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles));
3539	memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs));
3540
3541	mutex_init(&ehea_fw_handles.lock);
3542	spin_lock_init(&ehea_bcmc_regs.lock);
3543
3544	ret = check_module_parm();
3545	if (ret)
3546		goto out;
3547
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3548	ret = ibmebus_register_driver(&ehea_driver);
3549	if (ret) {
3550		pr_err("failed registering eHEA device driver on ebus\n");
3551		goto out;
3552	}
3553
3554	ret = driver_create_file(&ehea_driver.driver,
3555				 &driver_attr_capabilities);
3556	if (ret) {
3557		pr_err("failed to register capabilities attribute, ret=%d\n",
3558		       ret);
3559		goto out2;
3560	}
3561
3562	return ret;
3563
3564out2:
3565	ibmebus_unregister_driver(&ehea_driver);
 
 
 
 
3566out:
3567	return ret;
3568}
3569
3570static void __exit ehea_module_exit(void)
3571{
 
 
3572	driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities);
3573	ibmebus_unregister_driver(&ehea_driver);
3574	ehea_unregister_memory_hooks();
 
 
 
 
3575	kfree(ehea_fw_handles.arr);
3576	kfree(ehea_bcmc_regs.arr);
3577	ehea_destroy_busmap();
3578}
3579
3580module_init(ehea_module_init);
3581module_exit(ehea_module_exit);