lio_vf_main.c

   1/**********************************************************************
   2 * Author: Cavium, Inc.
   3 *
   4 * Contact: support@cavium.com
   5 *          Please include "LiquidIO" in the subject.
   6 *
   7 * Copyright (c) 2003-2016 Cavium, Inc.
   8 *
   9 * This file is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License, Version 2, as
  11 * published by the Free Software Foundation.
  12 *
  13 * This file is distributed in the hope that it will be useful, but
  14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16 * NONINFRINGEMENT.  See the GNU General Public License for more details.
  17 ***********************************************************************/
  18#include <linux/module.h>
  19#include <linux/interrupt.h>
  20#include <linux/pci.h>
  21#include <net/vxlan.h>
  22#include "liquidio_common.h"
  23#include "octeon_droq.h"
  24#include "octeon_iq.h"
  25#include "response_manager.h"
  26#include "octeon_device.h"
  27#include "octeon_nic.h"
  28#include "octeon_main.h"
  29#include "octeon_network.h"
  30#include "cn23xx_vf_device.h"
  31
  32MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
  33MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Virtual Function Driver");
  34MODULE_LICENSE("GPL");
  35
  36static int debug = -1;
  37module_param(debug, int, 0644);
  38MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
  39
  40#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
  41
  42struct oct_timestamp_resp {
  43	u64 rh;
  44	u64 timestamp;
  45	u64 status;
  46};
  47
  48union tx_info {
  49	u64 u64;
  50	struct {
  51#ifdef __BIG_ENDIAN_BITFIELD
  52		u16 gso_size;
  53		u16 gso_segs;
  54		u32 reserved;
  55#else
  56		u32 reserved;
  57		u16 gso_segs;
  58		u16 gso_size;
  59#endif
  60	} s;
  61};
  62
  63#define OCTNIC_GSO_MAX_HEADER_SIZE 128
  64#define OCTNIC_GSO_MAX_SIZE \
  65		(CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
  66
  67static int
  68liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
  69static void liquidio_vf_remove(struct pci_dev *pdev);
  70static int octeon_device_init(struct octeon_device *oct);
  71static int liquidio_stop(struct net_device *netdev);
  72
  73static int lio_wait_for_oq_pkts(struct octeon_device *oct)
  74{
  75	struct octeon_device_priv *oct_priv = oct->priv;
  76	int retry = MAX_IO_PENDING_PKT_COUNT;
  77	int pkt_cnt = 0, pending_pkts;
  78	int i;
  79
  80	do {
  81		pending_pkts = 0;
  82
  83		for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
  84			if (!(oct->io_qmask.oq & BIT_ULL(i)))
  85				continue;
  86			pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
  87		}
  88		if (pkt_cnt > 0) {
  89			pending_pkts += pkt_cnt;
  90			tasklet_schedule(&oct_priv->droq_tasklet);
  91		}
  92		pkt_cnt = 0;
  93		schedule_timeout_uninterruptible(1);
  94
  95	} while (retry-- && pending_pkts);
  96
  97	return pkt_cnt;
  98}
  99
 100/**
 101 * pcierror_quiesce_device - Cause device to go quiet so it can be safely removed/reset/etc
 102 * @oct: Pointer to Octeon device
 103 */
 104static void pcierror_quiesce_device(struct octeon_device *oct)
 105{
 106	int i;
 107
 108	/* Disable the input and output queues now. No more packets will
 109	 * arrive from Octeon, but we should wait for all packet processing
 110	 * to finish.
 111	 */
 112
 113	/* To allow for in-flight requests */
 114	schedule_timeout_uninterruptible(100);
 115
 116	if (wait_for_pending_requests(oct))
 117		dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 118
 119	/* Force all requests waiting to be fetched by OCTEON to complete. */
 120	for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 121		struct octeon_instr_queue *iq;
 122
 123		if (!(oct->io_qmask.iq & BIT_ULL(i)))
 124			continue;
 125		iq = oct->instr_queue[i];
 126
 127		if (atomic_read(&iq->instr_pending)) {
 128			spin_lock_bh(&iq->lock);
 129			iq->fill_cnt = 0;
 130			iq->octeon_read_index = iq->host_write_index;
 131			iq->stats.instr_processed +=
 132			    atomic_read(&iq->instr_pending);
 133			lio_process_iq_request_list(oct, iq, 0);
 134			spin_unlock_bh(&iq->lock);
 135		}
 136	}
 137
 138	/* Force all pending ordered list requests to time out. */
 139	lio_process_ordered_list(oct, 1);
 140
 141	/* We do not need to wait for output queue packets to be processed. */
 142}
 143
 144/**
 145 * cleanup_aer_uncorrect_error_status - Cleanup PCI AER uncorrectable error status
 146 * @dev: Pointer to PCI device
 147 */
 148static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 149{
 150	u32 status, mask;
 151	int pos = 0x100;
 152
 153	pr_info("%s :\n", __func__);
 154
 155	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
 156	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
 157	if (dev->error_state == pci_channel_io_normal)
 158		status &= ~mask; /* Clear corresponding nonfatal bits */
 159	else
 160		status &= mask; /* Clear corresponding fatal bits */
 161	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
 162}
 163
 164/**
 165 * stop_pci_io - Stop all PCI IO to a given device
 166 * @oct: Pointer to Octeon device
 167 */
 168static void stop_pci_io(struct octeon_device *oct)
 169{
 170	struct msix_entry *msix_entries;
 171	int i;
 172
 173	/* No more instructions will be forwarded. */
 174	atomic_set(&oct->status, OCT_DEV_IN_RESET);
 175
 176	for (i = 0; i < oct->ifcount; i++)
 177		netif_device_detach(oct->props[i].netdev);
 178
 179	/* Disable interrupts  */
 180	oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 181
 182	pcierror_quiesce_device(oct);
 183	if (oct->msix_on) {
 184		msix_entries = (struct msix_entry *)oct->msix_entries;
 185		for (i = 0; i < oct->num_msix_irqs; i++) {
 186			/* clear the affinity_cpumask */
 187			irq_set_affinity_hint(msix_entries[i].vector,
 188					      NULL);
 189			free_irq(msix_entries[i].vector,
 190				 &oct->ioq_vector[i]);
 191		}
 192		pci_disable_msix(oct->pci_dev);
 193		kfree(oct->msix_entries);
 194		oct->msix_entries = NULL;
 195		octeon_free_ioq_vector(oct);
 196	}
 197	dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 198		lio_get_state_string(&oct->status));
 199
 200	/* making it a common function for all OCTEON models */
 201	cleanup_aer_uncorrect_error_status(oct->pci_dev);
 202
 203	pci_disable_device(oct->pci_dev);
 204}
 205
 206/**
 207 * liquidio_pcie_error_detected - called when PCI error is detected
 208 * @pdev: Pointer to PCI device
 209 * @state: The current pci connection state
 210 *
 211 * This function is called after a PCI bus error affecting
 212 * this device has been detected.
 213 */
 214static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
 215						     pci_channel_state_t state)
 216{
 217	struct octeon_device *oct = pci_get_drvdata(pdev);
 218
 219	/* Non-correctable Non-fatal errors */
 220	if (state == pci_channel_io_normal) {
 221		dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
 222		cleanup_aer_uncorrect_error_status(oct->pci_dev);
 223		return PCI_ERS_RESULT_CAN_RECOVER;
 224	}
 225
 226	/* Non-correctable Fatal errors */
 227	dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
 228	stop_pci_io(oct);
 229
 230	return PCI_ERS_RESULT_DISCONNECT;
 231}
 232
 233/* For PCI-E Advanced Error Recovery (AER) Interface */
 234static const struct pci_error_handlers liquidio_vf_err_handler = {
 235	.error_detected = liquidio_pcie_error_detected,
 236};
 237
 238static const struct pci_device_id liquidio_vf_pci_tbl[] = {
 239	{
 240		PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
 241		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
 242	},
 243	{
 244		0, 0, 0, 0, 0, 0, 0
 245	}
 246};
 247MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
 248
 249static struct pci_driver liquidio_vf_pci_driver = {
 250	.name		= "LiquidIO_VF",
 251	.id_table	= liquidio_vf_pci_tbl,
 252	.probe		= liquidio_vf_probe,
 253	.remove		= liquidio_vf_remove,
 254	.err_handler	= &liquidio_vf_err_handler,    /* For AER */
 255};
 256
 257/**
 258 * print_link_info - Print link information
 259 * @netdev: network device
 260 */
 261static void print_link_info(struct net_device *netdev)
 262{
 263	struct lio *lio = GET_LIO(netdev);
 264
 265	if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
 266	    ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
 267		struct oct_link_info *linfo = &lio->linfo;
 268
 269		if (linfo->link.s.link_up) {
 270			netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
 271				   linfo->link.s.speed,
 272				   (linfo->link.s.duplex) ? "Full" : "Half");
 273		} else {
 274			netif_info(lio, link, lio->netdev, "Link Down\n");
 275		}
 276	}
 277}
 278
 279/**
 280 * octnet_link_status_change - Routine to notify MTU change
 281 * @work: work_struct data structure
 282 */
 283static void octnet_link_status_change(struct work_struct *work)
 284{
 285	struct cavium_wk *wk = (struct cavium_wk *)work;
 286	struct lio *lio = (struct lio *)wk->ctxptr;
 287
 288	/* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
 289	 * this API is invoked only when new max-MTU of the interface is
 290	 * less than current MTU.
 291	 */
 292	rtnl_lock();
 293	dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
 294	rtnl_unlock();
 295}
 296
 297/**
 298 * setup_link_status_change_wq - Sets up the mtu status change work
 299 * @netdev: network device
 300 */
 301static int setup_link_status_change_wq(struct net_device *netdev)
 302{
 303	struct lio *lio = GET_LIO(netdev);
 304	struct octeon_device *oct = lio->oct_dev;
 305
 306	lio->link_status_wq.wq = alloc_workqueue("link-status",
 307						 WQ_MEM_RECLAIM | WQ_PERCPU,
 308						 0);
 309	if (!lio->link_status_wq.wq) {
 310		dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
 311		return -1;
 312	}
 313	INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
 314			  octnet_link_status_change);
 315	lio->link_status_wq.wk.ctxptr = lio;
 316
 317	return 0;
 318}
 319
 320static void cleanup_link_status_change_wq(struct net_device *netdev)
 321{
 322	struct lio *lio = GET_LIO(netdev);
 323
 324	if (lio->link_status_wq.wq) {
 325		cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
 326		destroy_workqueue(lio->link_status_wq.wq);
 327	}
 328}
 329
 330/**
 331 * update_link_status - Update link status
 332 * @netdev: network device
 333 * @ls: link status structure
 334 *
 335 * Called on receipt of a link status response from the core application to
 336 * update each interface's link status.
 337 */
 338static void update_link_status(struct net_device *netdev,
 339			       union oct_link_status *ls)
 340{
 341	struct lio *lio = GET_LIO(netdev);
 342	int current_max_mtu = lio->linfo.link.s.mtu;
 343	struct octeon_device *oct = lio->oct_dev;
 344
 345	if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
 346		lio->linfo.link.u64 = ls->u64;
 347
 348		print_link_info(netdev);
 349		lio->link_changes++;
 350
 351		if (lio->linfo.link.s.link_up) {
 352			netif_carrier_on(netdev);
 353			wake_txqs(netdev);
 354		} else {
 355			netif_carrier_off(netdev);
 356			stop_txqs(netdev);
 357		}
 358
 359		if (lio->linfo.link.s.mtu != current_max_mtu) {
 360			dev_info(&oct->pci_dev->dev,
 361				 "Max MTU Changed from %d to %d\n",
 362				 current_max_mtu, lio->linfo.link.s.mtu);
 363			netdev->max_mtu = lio->linfo.link.s.mtu;
 364		}
 365
 366		if (lio->linfo.link.s.mtu < netdev->mtu) {
 367			dev_warn(&oct->pci_dev->dev,
 368				 "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
 369				 netdev->mtu, lio->linfo.link.s.mtu);
 370			queue_delayed_work(lio->link_status_wq.wq,
 371					   &lio->link_status_wq.wk.work, 0);
 372		}
 373	}
 374}
 375
 376/**
 377 * liquidio_vf_probe - PCI probe handler
 378 * @pdev: PCI device structure
 379 * @ent: unused
 380 */
 381static int
 382liquidio_vf_probe(struct pci_dev *pdev,
 383		  const struct pci_device_id __maybe_unused *ent)
 384{
 385	struct octeon_device *oct_dev = NULL;
 386
 387	oct_dev = octeon_allocate_device(pdev->device,
 388					 sizeof(struct octeon_device_priv));
 389
 390	if (!oct_dev) {
 391		dev_err(&pdev->dev, "Unable to allocate device\n");
 392		return -ENOMEM;
 393	}
 394	oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
 395
 396	dev_info(&pdev->dev, "Initializing device %x:%x.\n",
 397		 (u32)pdev->vendor, (u32)pdev->device);
 398
 399	/* Assign octeon_device for this device to the private data area. */
 400	pci_set_drvdata(pdev, oct_dev);
 401
 402	/* set linux specific device pointer */
 403	oct_dev->pci_dev = pdev;
 404
 405	oct_dev->subsystem_id = pdev->subsystem_vendor |
 406		(pdev->subsystem_device << 16);
 407
 408	if (octeon_device_init(oct_dev)) {
 409		liquidio_vf_remove(pdev);
 410		return -ENOMEM;
 411	}
 412
 413	dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
 414
 415	return 0;
 416}
 417
 418/**
 419 * octeon_pci_flr - PCI FLR for each Octeon device.
 420 * @oct: octeon device
 421 */
 422static void octeon_pci_flr(struct octeon_device *oct)
 423{
 424	pci_save_state(oct->pci_dev);
 425
 426	pci_cfg_access_lock(oct->pci_dev);
 427
 428	/* Quiesce the device completely */
 429	pci_write_config_word(oct->pci_dev, PCI_COMMAND,
 430			      PCI_COMMAND_INTX_DISABLE);
 431
 432	pcie_flr(oct->pci_dev);
 433
 434	pci_cfg_access_unlock(oct->pci_dev);
 435
 436	pci_restore_state(oct->pci_dev);
 437}
 438
 439/**
 440 * octeon_destroy_resources - Destroy resources associated with octeon device
 441 * @oct: octeon device
 442 */
 443static void octeon_destroy_resources(struct octeon_device *oct)
 444{
 445	struct octeon_device_priv *oct_priv = oct->priv;
 446	struct msix_entry *msix_entries;
 447	int i;
 448
 449	switch (atomic_read(&oct->status)) {
 450	case OCT_DEV_RUNNING:
 451	case OCT_DEV_CORE_OK:
 452		/* No more instructions will be forwarded. */
 453		atomic_set(&oct->status, OCT_DEV_IN_RESET);
 454
 455		oct->app_mode = CVM_DRV_INVALID_APP;
 456		dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
 457			lio_get_state_string(&oct->status));
 458
 459		schedule_timeout_uninterruptible(HZ / 10);
 460
 461		fallthrough;
 462	case OCT_DEV_HOST_OK:
 463	case OCT_DEV_IO_QUEUES_DONE:
 464		if (lio_wait_for_instr_fetch(oct))
 465			dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
 466
 467		if (wait_for_pending_requests(oct))
 468			dev_err(&oct->pci_dev->dev, "There were pending requests\n");
 469
 470		/* Disable the input and output queues now. No more packets will
 471		 * arrive from Octeon, but we should wait for all packet
 472		 * processing to finish.
 473		 */
 474		oct->fn_list.disable_io_queues(oct);
 475
 476		if (lio_wait_for_oq_pkts(oct))
 477			dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
 478
 479		/* Force all requests waiting to be fetched by OCTEON to
 480		 * complete.
 481		 */
 482		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 483			struct octeon_instr_queue *iq;
 484
 485			if (!(oct->io_qmask.iq & BIT_ULL(i)))
 486				continue;
 487			iq = oct->instr_queue[i];
 488
 489			if (atomic_read(&iq->instr_pending)) {
 490				spin_lock_bh(&iq->lock);
 491				iq->fill_cnt = 0;
 492				iq->octeon_read_index = iq->host_write_index;
 493				iq->stats.instr_processed +=
 494					atomic_read(&iq->instr_pending);
 495				lio_process_iq_request_list(oct, iq, 0);
 496				spin_unlock_bh(&iq->lock);
 497			}
 498		}
 499
 500		lio_process_ordered_list(oct, 1);
 501		octeon_free_sc_done_list(oct);
 502		octeon_free_sc_zombie_list(oct);
 503
 504		fallthrough;
 505	case OCT_DEV_INTR_SET_DONE:
 506		/* Disable interrupts  */
 507		oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
 508
 509		if (oct->msix_on) {
 510			msix_entries = (struct msix_entry *)oct->msix_entries;
 511			for (i = 0; i < oct->num_msix_irqs; i++) {
 512				if (oct->ioq_vector[i].vector) {
 513					irq_set_affinity_hint(
 514							msix_entries[i].vector,
 515							NULL);
 516					free_irq(msix_entries[i].vector,
 517						 &oct->ioq_vector[i]);
 518					oct->ioq_vector[i].vector = 0;
 519				}
 520			}
 521			pci_disable_msix(oct->pci_dev);
 522			kfree(oct->msix_entries);
 523			oct->msix_entries = NULL;
 524			kfree(oct->irq_name_storage);
 525			oct->irq_name_storage = NULL;
 526		}
 527		/* Soft reset the octeon device before exiting */
 528		if (!pcie_reset_flr(oct->pci_dev, PCI_RESET_PROBE))
 529			octeon_pci_flr(oct);
 530		else
 531			cn23xx_vf_ask_pf_to_do_flr(oct);
 532
 533		fallthrough;
 534	case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
 535		octeon_free_ioq_vector(oct);
 536
 537		fallthrough;
 538	case OCT_DEV_MBOX_SETUP_DONE:
 539		oct->fn_list.free_mbox(oct);
 540
 541		fallthrough;
 542	case OCT_DEV_IN_RESET:
 543	case OCT_DEV_DROQ_INIT_DONE:
 544		mdelay(100);
 545		for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
 546			if (!(oct->io_qmask.oq & BIT_ULL(i)))
 547				continue;
 548			octeon_delete_droq(oct, i);
 549		}
 550
 551		fallthrough;
 552	case OCT_DEV_RESP_LIST_INIT_DONE:
 553		octeon_delete_response_list(oct);
 554
 555		fallthrough;
 556	case OCT_DEV_INSTR_QUEUE_INIT_DONE:
 557		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 558			if (!(oct->io_qmask.iq & BIT_ULL(i)))
 559				continue;
 560			octeon_delete_instr_queue(oct, i);
 561		}
 562
 563		fallthrough;
 564	case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
 565		octeon_free_sc_buffer_pool(oct);
 566
 567		fallthrough;
 568	case OCT_DEV_DISPATCH_INIT_DONE:
 569		octeon_delete_dispatch_list(oct);
 570		cancel_delayed_work_sync(&oct->nic_poll_work.work);
 571
 572		fallthrough;
 573	case OCT_DEV_PCI_MAP_DONE:
 574		octeon_unmap_pci_barx(oct, 0);
 575		octeon_unmap_pci_barx(oct, 1);
 576
 577		fallthrough;
 578	case OCT_DEV_PCI_ENABLE_DONE:
 579		/* Disable the device, releasing the PCI INT */
 580		pci_disable_device(oct->pci_dev);
 581
 582		fallthrough;
 583	case OCT_DEV_BEGIN_STATE:
 584		/* Nothing to be done here either */
 585		break;
 586	}
 587
 588	tasklet_kill(&oct_priv->droq_tasklet);
 589}
 590
 591/**
 592 * send_rx_ctrl_cmd - Send Rx control command
 593 * @lio: per-network private data
 594 * @start_stop: whether to start or stop
 595 */
 596static int send_rx_ctrl_cmd(struct lio *lio, int start_stop)
 597{
 598	struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
 599	struct octeon_soft_command *sc;
 600	union octnet_cmd *ncmd;
 601	int retval;
 602
 603	if (oct->props[lio->ifidx].rx_on == start_stop)
 604		return 0;
 605
 606	sc = (struct octeon_soft_command *)
 607		octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
 608					  16, 0);
 609	if (!sc) {
 610		netif_info(lio, rx_err, lio->netdev,
 611			   "Failed to allocate octeon_soft_command struct\n");
 612		return -ENOMEM;
 613	}
 614
 615	ncmd = (union octnet_cmd *)sc->virtdptr;
 616
 617	ncmd->u64 = 0;
 618	ncmd->s.cmd = OCTNET_CMD_RX_CTL;
 619	ncmd->s.param1 = start_stop;
 620
 621	octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
 622
 623	sc->iq_no = lio->linfo.txpciq[0].s.q_no;
 624
 625	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
 626				    OPCODE_NIC_CMD, 0, 0, 0);
 627
 628	init_completion(&sc->complete);
 629	sc->sc_status = OCTEON_REQUEST_PENDING;
 630
 631	retval = octeon_send_soft_command(oct, sc);
 632	if (retval == IQ_SEND_FAILED) {
 633		netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
 634		octeon_free_soft_command(oct, sc);
 635	} else {
 636		/* Sleep on a wait queue till the cond flag indicates that the
 637		 * response arrived or timed-out.
 638		 */
 639		retval = wait_for_sc_completion_timeout(oct, sc, 0);
 640		if (retval)
 641			return retval;
 642
 643		oct->props[lio->ifidx].rx_on = start_stop;
 644		WRITE_ONCE(sc->caller_is_done, true);
 645	}
 646
 647	return retval;
 648}
 649
 650/**
 651 * liquidio_destroy_nic_device - Destroy NIC device interface
 652 * @oct: octeon device
 653 * @ifidx: which interface to destroy
 654 *
 655 * Cleanup associated with each interface for an Octeon device  when NIC
 656 * module is being unloaded or if initialization fails during load.
 657 */
 658static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
 659{
 660	struct net_device *netdev = oct->props[ifidx].netdev;
 661	struct octeon_device_priv *oct_priv = oct->priv;
 662	struct napi_struct *napi, *n;
 663	struct lio *lio;
 664
 665	if (!netdev) {
 666		dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
 667			__func__, ifidx);
 668		return;
 669	}
 670
 671	lio = GET_LIO(netdev);
 672
 673	dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
 674
 675	if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
 676		liquidio_stop(netdev);
 677
 678	if (oct->props[lio->ifidx].napi_enabled == 1) {
 679		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 680			napi_disable(napi);
 681
 682		oct->props[lio->ifidx].napi_enabled = 0;
 683
 684		oct->droq[0]->ops.poll_mode = 0;
 685	}
 686
 687	/* Delete NAPI */
 688	list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 689		netif_napi_del(napi);
 690
 691	tasklet_enable(&oct_priv->droq_tasklet);
 692
 693	if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
 694		unregister_netdev(netdev);
 695
 696	cleanup_rx_oom_poll_fn(netdev);
 697
 698	cleanup_link_status_change_wq(netdev);
 699
 700	lio_delete_glists(lio);
 701
 702	free_netdev(netdev);
 703
 704	oct->props[ifidx].gmxport = -1;
 705
 706	oct->props[ifidx].netdev = NULL;
 707}
 708
 709/**
 710 * liquidio_stop_nic_module - Stop complete NIC functionality
 711 * @oct: octeon device
 712 */
 713static int liquidio_stop_nic_module(struct octeon_device *oct)
 714{
 715	struct lio *lio;
 716	int i, j;
 717
 718	dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
 719	if (!oct->ifcount) {
 720		dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
 721		return 1;
 722	}
 723
 724	spin_lock_bh(&oct->cmd_resp_wqlock);
 725	oct->cmd_resp_state = OCT_DRV_OFFLINE;
 726	spin_unlock_bh(&oct->cmd_resp_wqlock);
 727
 728	for (i = 0; i < oct->ifcount; i++) {
 729		lio = GET_LIO(oct->props[i].netdev);
 730		for (j = 0; j < oct->num_oqs; j++)
 731			octeon_unregister_droq_ops(oct,
 732						   lio->linfo.rxpciq[j].s.q_no);
 733	}
 734
 735	for (i = 0; i < oct->ifcount; i++)
 736		liquidio_destroy_nic_device(oct, i);
 737
 738	dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
 739	return 0;
 740}
 741
 742/**
 743 * liquidio_vf_remove - Cleans up resources at unload time
 744 * @pdev: PCI device structure
 745 */
 746static void liquidio_vf_remove(struct pci_dev *pdev)
 747{
 748	struct octeon_device *oct_dev = pci_get_drvdata(pdev);
 749
 750	dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
 751
 752	if (oct_dev->app_mode == CVM_DRV_NIC_APP)
 753		liquidio_stop_nic_module(oct_dev);
 754
 755	/* Reset the octeon device and cleanup all memory allocated for
 756	 * the octeon device by driver.
 757	 */
 758	octeon_destroy_resources(oct_dev);
 759
 760	dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
 761
 762	/* This octeon device has been removed. Update the global
 763	 * data structure to reflect this. Free the device structure.
 764	 */
 765	octeon_free_device_mem(oct_dev);
 766}
 767
 768/**
 769 * octeon_pci_os_setup - PCI initialization for each Octeon device.
 770 * @oct: octeon device
 771 */
 772static int octeon_pci_os_setup(struct octeon_device *oct)
 773{
 774#ifdef CONFIG_PCI_IOV
 775	/* setup PCI stuff first */
 776	if (!oct->pci_dev->physfn)
 777		octeon_pci_flr(oct);
 778#endif
 779
 780	if (pci_enable_device(oct->pci_dev)) {
 781		dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
 782		return 1;
 783	}
 784
 785	if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
 786		dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
 787		pci_disable_device(oct->pci_dev);
 788		return 1;
 789	}
 790
 791	/* Enable PCI DMA Master. */
 792	pci_set_master(oct->pci_dev);
 793
 794	return 0;
 795}
 796
 797/**
 798 * free_netbuf - Unmap and free network buffer
 799 * @buf: buffer
 800 */
 801static void free_netbuf(void *buf)
 802{
 803	struct octnet_buf_free_info *finfo;
 804	struct sk_buff *skb;
 805	struct lio *lio;
 806
 807	finfo = (struct octnet_buf_free_info *)buf;
 808	skb = finfo->skb;
 809	lio = finfo->lio;
 810
 811	dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
 812			 DMA_TO_DEVICE);
 813
 814	tx_buffer_free(skb);
 815}
 816
 817/**
 818 * free_netsgbuf - Unmap and free gather buffer
 819 * @buf: buffer
 820 */
 821static void free_netsgbuf(void *buf)
 822{
 823	struct octnet_buf_free_info *finfo;
 824	struct octnic_gather *g;
 825	struct sk_buff *skb;
 826	int i, frags, iq;
 827	struct lio *lio;
 828
 829	finfo = (struct octnet_buf_free_info *)buf;
 830	skb = finfo->skb;
 831	lio = finfo->lio;
 832	g = finfo->g;
 833	frags = skb_shinfo(skb)->nr_frags;
 834
 835	dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 836			 g->sg[0].ptr[0], (skb->len - skb->data_len),
 837			 DMA_TO_DEVICE);
 838
 839	i = 1;
 840	while (frags--) {
 841		skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 842
 843		dma_unmap_page(&lio->oct_dev->pci_dev->dev,
 844			       g->sg[(i >> 2)].ptr[(i & 3)],
 845			       skb_frag_size(frag), DMA_TO_DEVICE);
 846		i++;
 847	}
 848
 849	iq = skb_iq(lio->oct_dev, skb);
 850
 851	spin_lock(&lio->glist_lock[iq]);
 852	list_add_tail(&g->list, &lio->glist[iq]);
 853	spin_unlock(&lio->glist_lock[iq]);
 854
 855	tx_buffer_free(skb);
 856}
 857
 858/**
 859 * free_netsgbuf_with_resp - Unmap and free gather buffer with response
 860 * @buf: buffer
 861 */
 862static void free_netsgbuf_with_resp(void *buf)
 863{
 864	struct octnet_buf_free_info *finfo;
 865	struct octeon_soft_command *sc;
 866	struct octnic_gather *g;
 867	struct sk_buff *skb;
 868	int i, frags, iq;
 869	struct lio *lio;
 870
 871	sc = (struct octeon_soft_command *)buf;
 872	skb = (struct sk_buff *)sc->callback_arg;
 873	finfo = (struct octnet_buf_free_info *)&skb->cb;
 874
 875	lio = finfo->lio;
 876	g = finfo->g;
 877	frags = skb_shinfo(skb)->nr_frags;
 878
 879	dma_unmap_single(&lio->oct_dev->pci_dev->dev,
 880			 g->sg[0].ptr[0], (skb->len - skb->data_len),
 881			 DMA_TO_DEVICE);
 882
 883	i = 1;
 884	while (frags--) {
 885		skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 886
 887		dma_unmap_page(&lio->oct_dev->pci_dev->dev,
 888			       g->sg[(i >> 2)].ptr[(i & 3)],
 889			       skb_frag_size(frag), DMA_TO_DEVICE);
 890		i++;
 891	}
 892
 893	iq = skb_iq(lio->oct_dev, skb);
 894
 895	spin_lock(&lio->glist_lock[iq]);
 896	list_add_tail(&g->list, &lio->glist[iq]);
 897	spin_unlock(&lio->glist_lock[iq]);
 898
 899	/* Don't free the skb yet */
 900}
 901
 902/**
 903 * liquidio_open - Net device open for LiquidIO
 904 * @netdev: network device
 905 */
 906static int liquidio_open(struct net_device *netdev)
 907{
 908	struct lio *lio = GET_LIO(netdev);
 909	struct octeon_device *oct = lio->oct_dev;
 910	struct octeon_device_priv *oct_priv = oct->priv;
 911	struct napi_struct *napi, *n;
 912	int ret = 0;
 913
 914	if (!oct->props[lio->ifidx].napi_enabled) {
 915		tasklet_disable(&oct_priv->droq_tasklet);
 916
 917		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 918			napi_enable(napi);
 919
 920		oct->props[lio->ifidx].napi_enabled = 1;
 921
 922		oct->droq[0]->ops.poll_mode = 1;
 923	}
 924
 925	ifstate_set(lio, LIO_IFSTATE_RUNNING);
 926
 927	/* Ready for link status updates */
 928	lio->intf_open = 1;
 929
 930	netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
 931	start_txqs(netdev);
 932
 933	INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
 934	lio->stats_wk.ctxptr = lio;
 935	schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
 936					(LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
 937
 938	/* tell Octeon to start forwarding packets to host */
 939	ret = send_rx_ctrl_cmd(lio, 1);
 940	if (ret)
 941		return ret;
 942
 943	dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
 944
 945	return ret;
 946}
 947
 948/**
 949 * liquidio_stop - jNet device stop for LiquidIO
 950 * @netdev: network device
 951 */
 952static int liquidio_stop(struct net_device *netdev)
 953{
 954	struct lio *lio = GET_LIO(netdev);
 955	struct octeon_device *oct = lio->oct_dev;
 956	struct octeon_device_priv *oct_priv = oct->priv;
 957	struct napi_struct *napi, *n;
 958	int ret = 0;
 959
 960	/* tell Octeon to stop forwarding packets to host */
 961	ret = send_rx_ctrl_cmd(lio, 0);
 962	if (ret)
 963		return ret;
 964
 965	netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
 966	/* Inform that netif carrier is down */
 967	lio->intf_open = 0;
 968	lio->linfo.link.s.link_up = 0;
 969
 970	netif_carrier_off(netdev);
 971	lio->link_changes++;
 972
 973	ifstate_reset(lio, LIO_IFSTATE_RUNNING);
 974
 975	stop_txqs(netdev);
 976
 977	/* Wait for any pending Rx descriptors */
 978	if (lio_wait_for_clean_oq(oct))
 979		netif_info(lio, rx_err, lio->netdev,
 980			   "Proceeding with stop interface after partial RX desc processing\n");
 981
 982	if (oct->props[lio->ifidx].napi_enabled == 1) {
 983		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
 984			napi_disable(napi);
 985
 986		oct->props[lio->ifidx].napi_enabled = 0;
 987
 988		oct->droq[0]->ops.poll_mode = 0;
 989
 990		tasklet_enable(&oct_priv->droq_tasklet);
 991	}
 992
 993	cancel_delayed_work_sync(&lio->stats_wk.work);
 994
 995	dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
 996
 997	return ret;
 998}
 999
1000/**
1001 * get_new_flags - Converts a mask based on net device flags
1002 * @netdev: network device
1003 *
1004 * This routine generates a octnet_ifflags mask from the net device flags
1005 * received from the OS.
1006 */
1007static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1008{
1009	enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1010
1011	if (netdev->flags & IFF_PROMISC)
1012		f |= OCTNET_IFFLAG_PROMISC;
1013
1014	if (netdev->flags & IFF_ALLMULTI)
1015		f |= OCTNET_IFFLAG_ALLMULTI;
1016
1017	if (netdev->flags & IFF_MULTICAST) {
1018		f |= OCTNET_IFFLAG_MULTICAST;
1019
1020		/* Accept all multicast addresses if there are more than we
1021		 * can handle
1022		 */
1023		if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1024			f |= OCTNET_IFFLAG_ALLMULTI;
1025	}
1026
1027	if (netdev->flags & IFF_BROADCAST)
1028		f |= OCTNET_IFFLAG_BROADCAST;
1029
1030	return f;
1031}
1032
1033static void liquidio_set_uc_list(struct net_device *netdev)
1034{
1035	struct lio *lio = GET_LIO(netdev);
1036	struct octeon_device *oct = lio->oct_dev;
1037	struct octnic_ctrl_pkt nctrl;
1038	struct netdev_hw_addr *ha;
1039	u64 *mac;
1040
1041	if (lio->netdev_uc_count == netdev_uc_count(netdev))
1042		return;
1043
1044	if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1045		dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1046		return;
1047	}
1048
1049	lio->netdev_uc_count = netdev_uc_count(netdev);
1050
1051	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1052	nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1053	nctrl.ncmd.s.more = lio->netdev_uc_count;
1054	nctrl.ncmd.s.param1 = oct->vf_num;
1055	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1056	nctrl.netpndev = (u64)netdev;
1057	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1058
1059	/* copy all the addresses into the udd */
1060	mac = &nctrl.udd[0];
1061	netdev_for_each_uc_addr(ha, netdev) {
1062		ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1063		mac++;
1064	}
1065
1066	octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1067}
1068
1069/**
1070 * liquidio_set_mcast_list - Net device set_multicast_list
1071 * @netdev: network device
1072 */
1073static void liquidio_set_mcast_list(struct net_device *netdev)
1074{
1075	int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1076	struct lio *lio = GET_LIO(netdev);
1077	struct octeon_device *oct = lio->oct_dev;
1078	struct octnic_ctrl_pkt nctrl;
1079	struct netdev_hw_addr *ha;
1080	u64 *mc;
1081	int ret;
1082
1083	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1084
1085	/* Create a ctrl pkt command to be sent to core app. */
1086	nctrl.ncmd.u64 = 0;
1087	nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1088	nctrl.ncmd.s.param1 = get_new_flags(netdev);
1089	nctrl.ncmd.s.param2 = mc_count;
1090	nctrl.ncmd.s.more = mc_count;
1091	nctrl.netpndev = (u64)netdev;
1092	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1093
1094	/* copy all the addresses into the udd */
1095	mc = &nctrl.udd[0];
1096	netdev_for_each_mc_addr(ha, netdev) {
1097		*mc = 0;
1098		ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1099		/* no need to swap bytes */
1100		if (++mc > &nctrl.udd[mc_count])
1101			break;
1102	}
1103
1104	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1105
1106	/* Apparently, any activity in this call from the kernel has to
1107	 * be atomic. So we won't wait for response.
1108	 */
1109
1110	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1111	if (ret) {
1112		dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1113			ret);
1114	}
1115
1116	liquidio_set_uc_list(netdev);
1117}
1118
1119/**
1120 * liquidio_set_mac - Net device set_mac_address
1121 * @netdev: network device
1122 * @p: opaque pointer to sockaddr
1123 */
1124static int liquidio_set_mac(struct net_device *netdev, void *p)
1125{
1126	struct sockaddr *addr = (struct sockaddr *)p;
1127	struct lio *lio = GET_LIO(netdev);
1128	struct octeon_device *oct = lio->oct_dev;
1129	struct octnic_ctrl_pkt nctrl;
1130	int ret = 0;
1131
1132	if (!is_valid_ether_addr(addr->sa_data))
1133		return -EADDRNOTAVAIL;
1134
1135	if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1136		return 0;
1137
1138	if (lio->linfo.macaddr_is_admin_asgnd)
1139		return -EPERM;
1140
1141	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1142
1143	nctrl.ncmd.u64 = 0;
1144	nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1145	nctrl.ncmd.s.param1 = 0;
1146	nctrl.ncmd.s.more = 1;
1147	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1148	nctrl.netpndev = (u64)netdev;
1149
1150	nctrl.udd[0] = 0;
1151	/* The MAC Address is presented in network byte order. */
1152	ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1153
1154	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1155	if (ret < 0) {
1156		dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1157		return -ENOMEM;
1158	}
1159
1160	if (nctrl.sc_status ==
1161	    FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1162		dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1163		return -EPERM;
1164	}
1165
1166	eth_hw_addr_set(netdev, addr->sa_data);
1167	ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1168
1169	return 0;
1170}
1171
1172static void
1173liquidio_get_stats64(struct net_device *netdev,
1174		     struct rtnl_link_stats64 *lstats)
1175{
1176	struct lio *lio = GET_LIO(netdev);
1177	struct octeon_device *oct;
1178	u64 pkts = 0, drop = 0, bytes = 0;
1179	struct oct_droq_stats *oq_stats;
1180	struct oct_iq_stats *iq_stats;
1181	int i, iq_no, oq_no;
1182
1183	oct = lio->oct_dev;
1184
1185	if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1186		return;
1187
1188	for (i = 0; i < oct->num_iqs; i++) {
1189		iq_no = lio->linfo.txpciq[i].s.q_no;
1190		iq_stats = &oct->instr_queue[iq_no]->stats;
1191		pkts += iq_stats->tx_done;
1192		drop += iq_stats->tx_dropped;
1193		bytes += iq_stats->tx_tot_bytes;
1194	}
1195
1196	lstats->tx_packets = pkts;
1197	lstats->tx_bytes = bytes;
1198	lstats->tx_dropped = drop;
1199
1200	pkts = 0;
1201	drop = 0;
1202	bytes = 0;
1203
1204	for (i = 0; i < oct->num_oqs; i++) {
1205		oq_no = lio->linfo.rxpciq[i].s.q_no;
1206		oq_stats = &oct->droq[oq_no]->stats;
1207		pkts += oq_stats->rx_pkts_received;
1208		drop += (oq_stats->rx_dropped +
1209			 oq_stats->dropped_nodispatch +
1210			 oq_stats->dropped_toomany +
1211			 oq_stats->dropped_nomem);
1212		bytes += oq_stats->rx_bytes_received;
1213	}
1214
1215	lstats->rx_bytes = bytes;
1216	lstats->rx_packets = pkts;
1217	lstats->rx_dropped = drop;
1218
1219	lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1220
1221	/* detailed rx_errors: */
1222	lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1223	/* recved pkt with crc error */
1224	lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1225	/* recv'd frame alignment error */
1226	lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1227
1228	lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1229			    lstats->rx_frame_errors;
1230
1231	/* detailed tx_errors */
1232	lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1233	lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1234
1235	lstats->tx_errors = lstats->tx_aborted_errors +
1236		lstats->tx_carrier_errors;
1237}
1238
1239static int liquidio_hwtstamp_set(struct net_device *netdev,
1240				 struct kernel_hwtstamp_config *conf,
1241				 struct netlink_ext_ack *extack)
1242{
1243	struct lio *lio = GET_LIO(netdev);
1244
1245	switch (conf->tx_type) {
1246	case HWTSTAMP_TX_ON:
1247	case HWTSTAMP_TX_OFF:
1248		break;
1249	default:
1250		return -ERANGE;
1251	}
1252
1253	switch (conf->rx_filter) {
1254	case HWTSTAMP_FILTER_NONE:
1255		break;
1256	case HWTSTAMP_FILTER_ALL:
1257	case HWTSTAMP_FILTER_SOME:
1258	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1259	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1260	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1261	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1262	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1263	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1264	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1265	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1266	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1267	case HWTSTAMP_FILTER_PTP_V2_EVENT:
1268	case HWTSTAMP_FILTER_PTP_V2_SYNC:
1269	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1270	case HWTSTAMP_FILTER_NTP_ALL:
1271		conf->rx_filter = HWTSTAMP_FILTER_ALL;
1272		break;
1273	default:
1274		return -ERANGE;
1275	}
1276
1277	if (conf->rx_filter == HWTSTAMP_FILTER_ALL)
1278		ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1279
1280	else
1281		ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1282
1283	return 0;
1284}
1285
1286static int liquidio_hwtstamp_get(struct net_device *netdev,
1287				 struct kernel_hwtstamp_config *conf)
1288{
1289	struct lio *lio = GET_LIO(netdev);
1290
1291	/* TX timestamping is techically always on */
1292	conf->tx_type = HWTSTAMP_TX_ON;
1293	conf->rx_filter = ifstate_check(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED) ?
1294			  HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
1295	return 0;
1296}
1297
1298static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1299{
1300	struct sk_buff *skb = (struct sk_buff *)buf;
1301	struct octnet_buf_free_info *finfo;
1302	struct oct_timestamp_resp *resp;
1303	struct octeon_soft_command *sc;
1304	struct lio *lio;
1305
1306	finfo = (struct octnet_buf_free_info *)skb->cb;
1307	lio = finfo->lio;
1308	sc = finfo->sc;
1309	oct = lio->oct_dev;
1310	resp = (struct oct_timestamp_resp *)sc->virtrptr;
1311
1312	if (status != OCTEON_REQUEST_DONE) {
1313		dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1314			CVM_CAST64(status));
1315		resp->timestamp = 0;
1316	}
1317
1318	octeon_swap_8B_data(&resp->timestamp, 1);
1319
1320	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1321		struct skb_shared_hwtstamps ts;
1322		u64 ns = resp->timestamp;
1323
1324		netif_info(lio, tx_done, lio->netdev,
1325			   "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1326			   skb, (unsigned long long)ns);
1327		ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1328		skb_tstamp_tx(skb, &ts);
1329	}
1330
1331	octeon_free_soft_command(oct, sc);
1332	tx_buffer_free(skb);
1333}
1334
1335/* send_nic_timestamp_pkt - Send a data packet that will be timestamped
1336 * @oct: octeon device
1337 * @ndata: pointer to network data
1338 * @finfo: pointer to private network data
1339 */
1340static int send_nic_timestamp_pkt(struct octeon_device *oct,
1341				  struct octnic_data_pkt *ndata,
1342				  struct octnet_buf_free_info *finfo,
1343				  int xmit_more)
1344{
1345	struct octeon_soft_command *sc;
1346	int ring_doorbell;
1347	struct lio *lio;
1348	int retval;
1349	u32 len;
1350
1351	lio = finfo->lio;
1352
1353	sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1354					    sizeof(struct oct_timestamp_resp));
1355	finfo->sc = sc;
1356
1357	if (!sc) {
1358		dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1359		return IQ_SEND_FAILED;
1360	}
1361
1362	if (ndata->reqtype == REQTYPE_NORESP_NET)
1363		ndata->reqtype = REQTYPE_RESP_NET;
1364	else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1365		ndata->reqtype = REQTYPE_RESP_NET_SG;
1366
1367	sc->callback = handle_timestamp;
1368	sc->callback_arg = finfo->skb;
1369	sc->iq_no = ndata->q_no;
1370
1371	len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1372
1373	ring_doorbell = !xmit_more;
1374
1375	retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1376				     sc, len, ndata->reqtype);
1377
1378	if (retval == IQ_SEND_FAILED) {
1379		dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1380			retval);
1381		octeon_free_soft_command(oct, sc);
1382	} else {
1383		netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1384	}
1385
1386	return retval;
1387}
1388
1389/**
1390 * liquidio_xmit - Transmit networks packets to the Octeon interface
1391 * @skb: skbuff struct to be passed to network layer.
1392 * @netdev: pointer to network device
1393 * @returns whether the packet was transmitted to the device okay or not
1394 *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
1395 */
1396static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1397{
1398	struct octnet_buf_free_info *finfo;
1399	union octnic_cmd_setup cmdsetup;
1400	struct octnic_data_pkt ndata;
1401	struct octeon_instr_irh *irh;
1402	struct oct_iq_stats *stats;
1403	struct octeon_device *oct;
1404	int q_idx = 0, iq_no = 0;
1405	union tx_info *tx_info;
1406	int xmit_more = 0;
1407	struct lio *lio;
1408	int status = 0;
1409	u64 dptr = 0;
1410	u32 tag = 0;
1411	int j;
1412
1413	lio = GET_LIO(netdev);
1414	oct = lio->oct_dev;
1415
1416	q_idx = skb_iq(lio->oct_dev, skb);
1417	tag = q_idx;
1418	iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1419
1420	stats = &oct->instr_queue[iq_no]->stats;
1421
1422	/* Check for all conditions in which the current packet cannot be
1423	 * transmitted.
1424	 */
1425	if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1426	    (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1427		netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1428			   lio->linfo.link.s.link_up);
1429		goto lio_xmit_failed;
1430	}
1431
1432	/* Use space in skb->cb to store info used to unmap and
1433	 * free the buffers.
1434	 */
1435	finfo = (struct octnet_buf_free_info *)skb->cb;
1436	finfo->lio = lio;
1437	finfo->skb = skb;
1438	finfo->sc = NULL;
1439
1440	/* Prepare the attributes for the data to be passed to OSI. */
1441	memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1442
1443	ndata.buf = finfo;
1444
1445	ndata.q_no = iq_no;
1446
1447	if (octnet_iq_is_full(oct, ndata.q_no)) {
1448		/* defer sending if queue is full */
1449		netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1450			   ndata.q_no);
1451		stats->tx_iq_busy++;
1452		return NETDEV_TX_BUSY;
1453	}
1454
1455	ndata.datasize = skb->len;
1456
1457	cmdsetup.u64 = 0;
1458	cmdsetup.s.iq_no = iq_no;
1459
1460	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1461		if (skb->encapsulation) {
1462			cmdsetup.s.tnl_csum = 1;
1463			stats->tx_vxlan++;
1464		} else {
1465			cmdsetup.s.transport_csum = 1;
1466		}
1467	}
1468	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1469		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1470		cmdsetup.s.timestamp = 1;
1471	}
1472
1473	if (!skb_shinfo(skb)->nr_frags) {
1474		cmdsetup.s.u.datasize = skb->len;
1475		octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1476		/* Offload checksum calculation for TCP/UDP packets */
1477		dptr = dma_map_single(&oct->pci_dev->dev,
1478				      skb->data,
1479				      skb->len,
1480				      DMA_TO_DEVICE);
1481		if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1482			dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1483				__func__);
1484			return NETDEV_TX_BUSY;
1485		}
1486
1487		ndata.cmd.cmd3.dptr = dptr;
1488		finfo->dptr = dptr;
1489		ndata.reqtype = REQTYPE_NORESP_NET;
1490
1491	} else {
1492		skb_frag_t *frag;
1493		struct octnic_gather *g;
1494		int i, frags;
1495
1496		spin_lock(&lio->glist_lock[q_idx]);
1497		g = (struct octnic_gather *)
1498			lio_list_delete_head(&lio->glist[q_idx]);
1499		spin_unlock(&lio->glist_lock[q_idx]);
1500
1501		if (!g) {
1502			netif_info(lio, tx_err, lio->netdev,
1503				   "Transmit scatter gather: glist null!\n");
1504			goto lio_xmit_failed;
1505		}
1506
1507		cmdsetup.s.gather = 1;
1508		cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1509		octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1510
1511		memset(g->sg, 0, g->sg_size);
1512
1513		g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1514						 skb->data,
1515						 (skb->len - skb->data_len),
1516						 DMA_TO_DEVICE);
1517		if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1518			dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1519				__func__);
1520			return NETDEV_TX_BUSY;
1521		}
1522		add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1523
1524		frags = skb_shinfo(skb)->nr_frags;
1525		i = 1;
1526		while (frags--) {
1527			frag = &skb_shinfo(skb)->frags[i - 1];
1528
1529			g->sg[(i >> 2)].ptr[(i & 3)] =
1530				skb_frag_dma_map(&oct->pci_dev->dev,
1531						 frag, 0, skb_frag_size(frag),
1532						 DMA_TO_DEVICE);
1533			if (dma_mapping_error(&oct->pci_dev->dev,
1534					      g->sg[i >> 2].ptr[i & 3])) {
1535				dma_unmap_single(&oct->pci_dev->dev,
1536						 g->sg[0].ptr[0],
1537						 skb->len - skb->data_len,
1538						 DMA_TO_DEVICE);
1539				for (j = 1; j < i; j++) {
1540					frag = &skb_shinfo(skb)->frags[j - 1];
1541					dma_unmap_page(&oct->pci_dev->dev,
1542						       g->sg[j >> 2].ptr[j & 3],
1543						       skb_frag_size(frag),
1544						       DMA_TO_DEVICE);
1545				}
1546				dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1547					__func__);
1548				return NETDEV_TX_BUSY;
1549			}
1550
1551			add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1552				    (i & 3));
1553			i++;
1554		}
1555
1556		dptr = g->sg_dma_ptr;
1557
1558		ndata.cmd.cmd3.dptr = dptr;
1559		finfo->dptr = dptr;
1560		finfo->g = g;
1561
1562		ndata.reqtype = REQTYPE_NORESP_NET_SG;
1563	}
1564
1565	irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1566	tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1567
1568	if (skb_shinfo(skb)->gso_size) {
1569		tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1570		tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1571	}
1572
1573	/* HW insert VLAN tag */
1574	if (skb_vlan_tag_present(skb)) {
1575		irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1576		irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1577	}
1578
1579	xmit_more = netdev_xmit_more();
1580
1581	if (unlikely(cmdsetup.s.timestamp))
1582		status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1583	else
1584		status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1585	if (status == IQ_SEND_FAILED)
1586		goto lio_xmit_failed;
1587
1588	netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1589
1590	if (status == IQ_SEND_STOP) {
1591		dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1592			iq_no);
1593		netif_stop_subqueue(netdev, q_idx);
1594	}
1595
1596	netif_trans_update(netdev);
1597
1598	if (tx_info->s.gso_segs)
1599		stats->tx_done += tx_info->s.gso_segs;
1600	else
1601		stats->tx_done++;
1602	stats->tx_tot_bytes += ndata.datasize;
1603
1604	return NETDEV_TX_OK;
1605
1606lio_xmit_failed:
1607	stats->tx_dropped++;
1608	netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1609		   iq_no, stats->tx_dropped);
1610	if (dptr)
1611		dma_unmap_single(&oct->pci_dev->dev, dptr,
1612				 ndata.datasize, DMA_TO_DEVICE);
1613
1614	octeon_ring_doorbell_locked(oct, iq_no);
1615
1616	tx_buffer_free(skb);
1617	return NETDEV_TX_OK;
1618}
1619
1620/**
1621 * liquidio_tx_timeout - Network device Tx timeout
1622 * @netdev: pointer to network device
1623 * @txqueue: index of the hung transmit queue
1624 */
1625static void liquidio_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1626{
1627	struct lio *lio;
1628
1629	lio = GET_LIO(netdev);
1630
1631	netif_info(lio, tx_err, lio->netdev,
1632		   "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1633		   netdev->stats.tx_dropped);
1634	netif_trans_update(netdev);
1635	wake_txqs(netdev);
1636}
1637
1638static int
1639liquidio_vlan_rx_add_vid(struct net_device *netdev,
1640			 __be16 proto __attribute__((unused)), u16 vid)
1641{
1642	struct lio *lio = GET_LIO(netdev);
1643	struct octeon_device *oct = lio->oct_dev;
1644	struct octnic_ctrl_pkt nctrl;
1645	int ret = 0;
1646
1647	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1648
1649	nctrl.ncmd.u64 = 0;
1650	nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1651	nctrl.ncmd.s.param1 = vid;
1652	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1653	nctrl.netpndev = (u64)netdev;
1654	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1655
1656	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1657	if (ret) {
1658		dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1659			ret);
1660		return -EPERM;
1661	}
1662
1663	return 0;
1664}
1665
1666static int
1667liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1668			  __be16 proto __attribute__((unused)), u16 vid)
1669{
1670	struct lio *lio = GET_LIO(netdev);
1671	struct octeon_device *oct = lio->oct_dev;
1672	struct octnic_ctrl_pkt nctrl;
1673	int ret = 0;
1674
1675	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1676
1677	nctrl.ncmd.u64 = 0;
1678	nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1679	nctrl.ncmd.s.param1 = vid;
1680	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1681	nctrl.netpndev = (u64)netdev;
1682	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1683
1684	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1685	if (ret) {
1686		dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1687			ret);
1688		if (ret > 0)
1689			ret = -EIO;
1690	}
1691	return ret;
1692}
1693
1694/** Sending command to enable/disable RX checksum offload
1695 * @param netdev                pointer to network device
1696 * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
1697 * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
1698 *                              OCTNET_CMD_RXCSUM_DISABLE
1699 * @returns                     SUCCESS or FAILURE
1700 */
1701static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1702				       u8 rx_cmd)
1703{
1704	struct lio *lio = GET_LIO(netdev);
1705	struct octeon_device *oct = lio->oct_dev;
1706	struct octnic_ctrl_pkt nctrl;
1707	int ret = 0;
1708
1709	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1710
1711	nctrl.ncmd.u64 = 0;
1712	nctrl.ncmd.s.cmd = command;
1713	nctrl.ncmd.s.param1 = rx_cmd;
1714	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1715	nctrl.netpndev = (u64)netdev;
1716	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1717
1718	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1719	if (ret) {
1720		dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1721			ret);
1722		if (ret > 0)
1723			ret = -EIO;
1724	}
1725	return ret;
1726}
1727
1728/** Sending command to add/delete VxLAN UDP port to firmware
1729 * @param netdev                pointer to network device
1730 * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
1731 * @param vxlan_port            VxLAN port to be added or deleted
1732 * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
1733 *                              OCTNET_CMD_VXLAN_PORT_DEL
1734 * @returns                     SUCCESS or FAILURE
1735 */
1736static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1737				       u16 vxlan_port, u8 vxlan_cmd_bit)
1738{
1739	struct lio *lio = GET_LIO(netdev);
1740	struct octeon_device *oct = lio->oct_dev;
1741	struct octnic_ctrl_pkt nctrl;
1742	int ret = 0;
1743
1744	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1745
1746	nctrl.ncmd.u64 = 0;
1747	nctrl.ncmd.s.cmd = command;
1748	nctrl.ncmd.s.more = vxlan_cmd_bit;
1749	nctrl.ncmd.s.param1 = vxlan_port;
1750	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1751	nctrl.netpndev = (u64)netdev;
1752	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1753
1754	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1755	if (ret) {
1756		dev_err(&oct->pci_dev->dev,
1757			"DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1758			ret);
1759		if (ret > 0)
1760			ret = -EIO;
1761	}
1762	return ret;
1763}
1764
1765static int liquidio_udp_tunnel_set_port(struct net_device *netdev,
1766					unsigned int table, unsigned int entry,
1767					struct udp_tunnel_info *ti)
1768{
1769	return liquidio_vxlan_port_command(netdev,
1770					   OCTNET_CMD_VXLAN_PORT_CONFIG,
1771					   htons(ti->port),
1772					   OCTNET_CMD_VXLAN_PORT_ADD);
1773}
1774
1775static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,
1776					  unsigned int table,
1777					  unsigned int entry,
1778					  struct udp_tunnel_info *ti)
1779{
1780	return liquidio_vxlan_port_command(netdev,
1781					   OCTNET_CMD_VXLAN_PORT_CONFIG,
1782					   htons(ti->port),
1783					   OCTNET_CMD_VXLAN_PORT_DEL);
1784}
1785
1786static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {
1787	.set_port	= liquidio_udp_tunnel_set_port,
1788	.unset_port	= liquidio_udp_tunnel_unset_port,
1789	.tables		= {
1790		{ .n_entries = 1024, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
1791	},
1792};
1793
1794/** \brief Net device fix features
1795 * @param netdev  pointer to network device
1796 * @param request features requested
1797 * @returns updated features list
1798 */
1799static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1800					       netdev_features_t request)
1801{
1802	struct lio *lio = netdev_priv(netdev);
1803
1804	if ((request & NETIF_F_RXCSUM) &&
1805	    !(lio->dev_capability & NETIF_F_RXCSUM))
1806		request &= ~NETIF_F_RXCSUM;
1807
1808	if ((request & NETIF_F_HW_CSUM) &&
1809	    !(lio->dev_capability & NETIF_F_HW_CSUM))
1810		request &= ~NETIF_F_HW_CSUM;
1811
1812	if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1813		request &= ~NETIF_F_TSO;
1814
1815	if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1816		request &= ~NETIF_F_TSO6;
1817
1818	if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1819		request &= ~NETIF_F_LRO;
1820
1821	/* Disable LRO if RXCSUM is off */
1822	if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1823	    (lio->dev_capability & NETIF_F_LRO))
1824		request &= ~NETIF_F_LRO;
1825
1826	return request;
1827}
1828
1829/** \brief Net device set features
1830 * @param netdev  pointer to network device
1831 * @param features features to enable/disable
1832 */
1833static int liquidio_set_features(struct net_device *netdev,
1834				 netdev_features_t features)
1835{
1836	struct lio *lio = netdev_priv(netdev);
1837
1838	if (!((netdev->features ^ features) & NETIF_F_LRO))
1839		return 0;
1840
1841	if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1842		liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1843				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1844	else if (!(features & NETIF_F_LRO) &&
1845		 (lio->dev_capability & NETIF_F_LRO))
1846		liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1847				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1848	if (!(netdev->features & NETIF_F_RXCSUM) &&
1849	    (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1850	    (features & NETIF_F_RXCSUM))
1851		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1852					    OCTNET_CMD_RXCSUM_ENABLE);
1853	else if ((netdev->features & NETIF_F_RXCSUM) &&
1854		 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1855		 !(features & NETIF_F_RXCSUM))
1856		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1857					    OCTNET_CMD_RXCSUM_DISABLE);
1858
1859	return 0;
1860}
1861
1862static const struct net_device_ops lionetdevops = {
1863	.ndo_open		= liquidio_open,
1864	.ndo_stop		= liquidio_stop,
1865	.ndo_start_xmit		= liquidio_xmit,
1866	.ndo_get_stats64	= liquidio_get_stats64,
1867	.ndo_set_mac_address	= liquidio_set_mac,
1868	.ndo_set_rx_mode	= liquidio_set_mcast_list,
1869	.ndo_tx_timeout		= liquidio_tx_timeout,
1870	.ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
1871	.ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
1872	.ndo_change_mtu		= liquidio_change_mtu,
1873	.ndo_fix_features	= liquidio_fix_features,
1874	.ndo_set_features	= liquidio_set_features,
1875	.ndo_hwtstamp_get	= liquidio_hwtstamp_get,
1876	.ndo_hwtstamp_set	= liquidio_hwtstamp_set,
1877};
1878
1879static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1880{
1881	struct octeon_device *oct = (struct octeon_device *)buf;
1882	struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1883	union oct_link_status *ls;
1884	int gmxport = 0;
1885	int i;
1886
1887	if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1888		dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1889			recv_pkt->buffer_size[0],
1890			recv_pkt->rh.r_nic_info.gmxport);
1891		goto nic_info_err;
1892	}
1893
1894	gmxport = recv_pkt->rh.r_nic_info.gmxport;
1895	ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1896		OCT_DROQ_INFO_SIZE);
1897
1898	octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1899
1900	for (i = 0; i < oct->ifcount; i++) {
1901		if (oct->props[i].gmxport == gmxport) {
1902			update_link_status(oct->props[i].netdev, ls);
1903			break;
1904		}
1905	}
1906
1907nic_info_err:
1908	for (i = 0; i < recv_pkt->buffer_count; i++)
1909		recv_buffer_free(recv_pkt->buffer_ptr[i]);
1910	octeon_free_recv_info(recv_info);
1911	return 0;
1912}
1913
1914/**
1915 * setup_nic_devices - Setup network interfaces
1916 * @octeon_dev:  octeon device
1917 *
1918 * Called during init time for each device. It assumes the NIC
1919 * is already up and running.  The link information for each
1920 * interface is passed in link_info.
1921 */
1922static int setup_nic_devices(struct octeon_device *octeon_dev)
1923{
1924	int retval, num_iqueues, num_oqueues;
1925	u32 resp_size, data_size;
1926	struct liquidio_if_cfg_resp *resp;
1927	struct octeon_soft_command *sc;
1928	union oct_nic_if_cfg if_cfg;
1929	struct octdev_props *props;
1930	struct net_device *netdev;
1931	struct lio_version *vdata;
1932	struct lio *lio = NULL;
1933	u8 mac[ETH_ALEN], i, j;
1934	u32 ifidx_or_pfnum;
1935
1936	ifidx_or_pfnum = octeon_dev->pf_num;
1937
1938	/* This is to handle link status changes */
1939	octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1940				    lio_nic_info, octeon_dev);
1941
1942	/* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1943	 * They are handled directly.
1944	 */
1945	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1946					free_netbuf);
1947
1948	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1949					free_netsgbuf);
1950
1951	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1952					free_netsgbuf_with_resp);
1953
1954	for (i = 0; i < octeon_dev->ifcount; i++) {
1955		resp_size = sizeof(struct liquidio_if_cfg_resp);
1956		data_size = sizeof(struct lio_version);
1957		sc = (struct octeon_soft_command *)
1958			octeon_alloc_soft_command(octeon_dev, data_size,
1959						  resp_size, 0);
1960		resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1961		vdata = (struct lio_version *)sc->virtdptr;
1962
1963		*((u64 *)vdata) = 0;
1964		vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1965		vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1966		vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1967
1968		if_cfg.u64 = 0;
1969
1970		if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1971		if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1972		if_cfg.s.base_queue = 0;
1973
1974		sc->iq_no = 0;
1975
1976		octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1977					    OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1978					    0);
1979
1980		init_completion(&sc->complete);
1981		sc->sc_status = OCTEON_REQUEST_PENDING;
1982
1983		retval = octeon_send_soft_command(octeon_dev, sc);
1984		if (retval == IQ_SEND_FAILED) {
1985			dev_err(&octeon_dev->pci_dev->dev,
1986				"iq/oq config failed status: %x\n", retval);
1987			/* Soft instr is freed by driver in case of failure. */
1988			octeon_free_soft_command(octeon_dev, sc);
1989			return(-EIO);
1990		}
1991
1992		/* Sleep on a wait queue till the cond flag indicates that the
1993		 * response arrived or timed-out.
1994		 */
1995		retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
1996		if (retval)
1997			return retval;
1998
1999		retval = resp->status;
2000		if (retval) {
2001			dev_err(&octeon_dev->pci_dev->dev,
2002				"iq/oq config failed, retval = %d\n", retval);
2003			WRITE_ONCE(sc->caller_is_done, true);
2004			return -EIO;
2005		}
2006
2007		snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2008			 32, "%s",
2009			 resp->cfg_info.liquidio_firmware_version);
2010
2011		octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2012				    (sizeof(struct liquidio_if_cfg_info)) >> 3);
2013
2014		num_iqueues = hweight64(resp->cfg_info.iqmask);
2015		num_oqueues = hweight64(resp->cfg_info.oqmask);
2016
2017		if (!(num_iqueues) || !(num_oqueues)) {
2018			dev_err(&octeon_dev->pci_dev->dev,
2019				"Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2020				resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2021			WRITE_ONCE(sc->caller_is_done, true);
2022			goto setup_nic_dev_done;
2023		}
2024		dev_dbg(&octeon_dev->pci_dev->dev,
2025			"interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2026			i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2027			num_iqueues, num_oqueues);
2028
2029		netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2030
2031		if (!netdev) {
2032			dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2033			WRITE_ONCE(sc->caller_is_done, true);
2034			goto setup_nic_dev_done;
2035		}
2036
2037		SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2038
2039		/* Associate the routines that will handle different
2040		 * netdev tasks.
2041		 */
2042		netdev->netdev_ops = &lionetdevops;
2043
2044		lio = GET_LIO(netdev);
2045
2046		memset(lio, 0, sizeof(struct lio));
2047
2048		lio->ifidx = ifidx_or_pfnum;
2049
2050		props = &octeon_dev->props[i];
2051		props->gmxport = resp->cfg_info.linfo.gmxport;
2052		props->netdev = netdev;
2053
2054		lio->linfo.num_rxpciq = num_oqueues;
2055		lio->linfo.num_txpciq = num_iqueues;
2056
2057		for (j = 0; j < num_oqueues; j++) {
2058			lio->linfo.rxpciq[j].u64 =
2059			    resp->cfg_info.linfo.rxpciq[j].u64;
2060		}
2061		for (j = 0; j < num_iqueues; j++) {
2062			lio->linfo.txpciq[j].u64 =
2063			    resp->cfg_info.linfo.txpciq[j].u64;
2064		}
2065
2066		lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2067		lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2068		lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2069		lio->linfo.macaddr_is_admin_asgnd =
2070			resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2071		lio->linfo.macaddr_spoofchk =
2072			resp->cfg_info.linfo.macaddr_spoofchk;
2073
2074		lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2075
2076		lio->dev_capability = NETIF_F_HIGHDMA
2077				      | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2078				      | NETIF_F_SG | NETIF_F_RXCSUM
2079				      | NETIF_F_TSO | NETIF_F_TSO6
2080				      | NETIF_F_GRO
2081				      | NETIF_F_LRO;
2082		netif_set_tso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2083
2084		/* Copy of transmit encapsulation capabilities:
2085		 * TSO, TSO6, Checksums for this device
2086		 */
2087		lio->enc_dev_capability = NETIF_F_IP_CSUM
2088					  | NETIF_F_IPV6_CSUM
2089					  | NETIF_F_GSO_UDP_TUNNEL
2090					  | NETIF_F_HW_CSUM | NETIF_F_SG
2091					  | NETIF_F_RXCSUM
2092					  | NETIF_F_TSO | NETIF_F_TSO6
2093					  | NETIF_F_LRO;
2094
2095		netdev->hw_enc_features =
2096		    (lio->enc_dev_capability & ~NETIF_F_LRO);
2097		netdev->udp_tunnel_nic_info = &liquidio_udp_tunnels;
2098
2099		netdev->vlan_features = lio->dev_capability;
2100		/* Add any unchangeable hw features */
2101		lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2102				       NETIF_F_HW_VLAN_CTAG_RX |
2103				       NETIF_F_HW_VLAN_CTAG_TX;
2104
2105		netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2106
2107		netdev->hw_features = lio->dev_capability;
2108		netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2109
2110		/* MTU range: 68 - 16000 */
2111		netdev->min_mtu = LIO_MIN_MTU_SIZE;
2112		netdev->max_mtu = LIO_MAX_MTU_SIZE;
2113
2114		WRITE_ONCE(sc->caller_is_done, true);
2115
2116		/* Point to the  properties for octeon device to which this
2117		 * interface belongs.
2118		 */
2119		lio->oct_dev = octeon_dev;
2120		lio->octprops = props;
2121		lio->netdev = netdev;
2122
2123		dev_dbg(&octeon_dev->pci_dev->dev,
2124			"if%d gmx: %d hw_addr: 0x%llx\n", i,
2125			lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2126
2127		/* 64-bit swap required on LE machines */
2128		octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2129		for (j = 0; j < ETH_ALEN; j++)
2130			mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2131
2132		/* Copy MAC Address to OS network device structure */
2133		eth_hw_addr_set(netdev, mac);
2134
2135		if (liquidio_setup_io_queues(octeon_dev, i,
2136					     lio->linfo.num_txpciq,
2137					     lio->linfo.num_rxpciq)) {
2138			dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2139			goto setup_nic_dev_free;
2140		}
2141
2142		ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2143
2144		/* For VFs, enable Octeon device interrupts here,
2145		 * as this is contingent upon IO queue setup
2146		 */
2147		octeon_dev->fn_list.enable_interrupt(octeon_dev,
2148						     OCTEON_ALL_INTR);
2149
2150		/* By default all interfaces on a single Octeon uses the same
2151		 * tx and rx queues
2152		 */
2153		lio->txq = lio->linfo.txpciq[0].s.q_no;
2154		lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2155
2156		lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2157		lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2158
2159		if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2160			dev_err(&octeon_dev->pci_dev->dev,
2161				"Gather list allocation failed\n");
2162			goto setup_nic_dev_free;
2163		}
2164
2165		/* Register ethtool support */
2166		liquidio_set_ethtool_ops(netdev);
2167		if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2168			octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2169		else
2170			octeon_dev->priv_flags = 0x0;
2171
2172		if (netdev->features & NETIF_F_LRO)
2173			liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2174					     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2175
2176		if (setup_link_status_change_wq(netdev))
2177			goto setup_nic_dev_free;
2178
2179		if (setup_rx_oom_poll_fn(netdev))
2180			goto setup_nic_dev_free;
2181
2182		/* Register the network device with the OS */
2183		if (register_netdev(netdev)) {
2184			dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2185			goto setup_nic_dev_free;
2186		}
2187
2188		dev_dbg(&octeon_dev->pci_dev->dev,
2189			"Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2190			i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2191		netif_carrier_off(netdev);
2192		lio->link_changes++;
2193
2194		ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2195
2196		/* Sending command to firmware to enable Rx checksum offload
2197		 * by default at the time of setup of Liquidio driver for
2198		 * this device
2199		 */
2200		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2201					    OCTNET_CMD_RXCSUM_ENABLE);
2202		liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2203				     OCTNET_CMD_TXCSUM_ENABLE);
2204
2205		dev_dbg(&octeon_dev->pci_dev->dev,
2206			"NIC ifidx:%d Setup successful\n", i);
2207
2208		octeon_dev->no_speed_setting = 1;
2209	}
2210
2211	return 0;
2212
2213setup_nic_dev_free:
2214
2215	do {
2216		dev_err(&octeon_dev->pci_dev->dev,
2217			"NIC ifidx:%d Setup failed\n", i);
2218		liquidio_destroy_nic_device(octeon_dev, i);
2219	} while (i--);
2220
2221setup_nic_dev_done:
2222
2223	return -ENODEV;
2224}
2225
2226/**
2227 * liquidio_init_nic_module - initialize the NIC
2228 * @oct: octeon device
2229 *
2230 * This initialization routine is called once the Octeon device application is
2231 * up and running
2232 */
2233static int liquidio_init_nic_module(struct octeon_device *oct)
2234{
2235	int num_nic_ports = 1;
2236	int i, retval = 0;
2237
2238	dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2239
2240	/* only default iq and oq were initialized
2241	 * initialize the rest as well run port_config command for each port
2242	 */
2243	oct->ifcount = num_nic_ports;
2244	memset(oct->props, 0,
2245	       sizeof(struct octdev_props) * num_nic_ports);
2246
2247	for (i = 0; i < MAX_OCTEON_LINKS; i++)
2248		oct->props[i].gmxport = -1;
2249
2250	retval = setup_nic_devices(oct);
2251	if (retval) {
2252		dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2253		goto octnet_init_failure;
2254	}
2255
2256	dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2257
2258	return retval;
2259
2260octnet_init_failure:
2261
2262	oct->ifcount = 0;
2263
2264	return retval;
2265}
2266
2267/**
2268 * octeon_device_init - Device initialization for each Octeon device that is probed
2269 * @oct:  octeon device
2270 */
2271static int octeon_device_init(struct octeon_device *oct)
2272{
2273	u32 rev_id;
2274	int j;
2275
2276	atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2277
2278	/* Enable access to the octeon device and make its DMA capability
2279	 * known to the OS.
2280	 */
2281	if (octeon_pci_os_setup(oct))
2282		return 1;
2283	atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2284
2285	oct->chip_id = OCTEON_CN23XX_VF_VID;
2286	pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2287	oct->rev_id = rev_id & 0xff;
2288
2289	if (cn23xx_setup_octeon_vf_device(oct))
2290		return 1;
2291
2292	atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2293
2294	oct->app_mode = CVM_DRV_NIC_APP;
2295
2296	/* Initialize the dispatch mechanism used to push packets arriving on
2297	 * Octeon Output queues.
2298	 */
2299	if (octeon_init_dispatch_list(oct))
2300		return 1;
2301
2302	atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2303
2304	if (octeon_set_io_queues_off(oct)) {
2305		dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2306		return 1;
2307	}
2308
2309	if (oct->fn_list.setup_device_regs(oct)) {
2310		dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2311		return 1;
2312	}
2313
2314	/* Initialize soft command buffer pool */
2315	if (octeon_setup_sc_buffer_pool(oct)) {
2316		dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2317		return 1;
2318	}
2319	atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2320
2321	/* Setup the data structures that manage this Octeon's Input queues. */
2322	if (octeon_setup_instr_queues(oct)) {
2323		dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2324		return 1;
2325	}
2326	atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2327
2328	/* Initialize lists to manage the requests of different types that
2329	 * arrive from user & kernel applications for this octeon device.
2330	 */
2331	if (octeon_setup_response_list(oct)) {
2332		dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2333		return 1;
2334	}
2335	atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2336
2337	if (octeon_setup_output_queues(oct)) {
2338		dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2339		return 1;
2340	}
2341	atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2342
2343	if (oct->fn_list.setup_mbox(oct)) {
2344		dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2345		return 1;
2346	}
2347	atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2348
2349	if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2350		dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2351		return 1;
2352	}
2353	atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2354
2355	dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF: %d ioqs\n",
2356		 oct->sriov_info.rings_per_vf);
2357
2358	/* Setup the interrupt handler and record the INT SUM register address*/
2359	if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2360		return 1;
2361
2362	atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2363
2364	/* ***************************************************************
2365	 * The interrupts need to be enabled for the PF<-->VF handshake.
2366	 * They are [re]-enabled after the PF<-->VF handshake so that the
2367	 * correct OQ tick value is used (i.e. the value retrieved from
2368	 * the PF as part of the handshake).
2369	 */
2370
2371	/* Enable Octeon device interrupts */
2372	oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2373
2374	if (cn23xx_octeon_pfvf_handshake(oct))
2375		return 1;
2376
2377	/* Here we [re]-enable the interrupts so that the correct OQ tick value
2378	 * is used (i.e. the value that was retrieved during the handshake)
2379	 */
2380
2381	/* Enable Octeon device interrupts */
2382	oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2383	/* *************************************************************** */
2384
2385	/* Enable the input and output queues for this Octeon device */
2386	if (oct->fn_list.enable_io_queues(oct)) {
2387		dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2388		return 1;
2389	}
2390
2391	atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2392
2393	atomic_set(&oct->status, OCT_DEV_HOST_OK);
2394
2395	/* Send Credit for Octeon Output queues. Credits are always sent after
2396	 * the output queue is enabled.
2397	 */
2398	for (j = 0; j < oct->num_oqs; j++)
2399		writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2400
2401	/* Packets can start arriving on the output queues from this point. */
2402
2403	atomic_set(&oct->status, OCT_DEV_CORE_OK);
2404
2405	atomic_set(&oct->status, OCT_DEV_RUNNING);
2406
2407	if (liquidio_init_nic_module(oct))
2408		return 1;
2409
2410	return 0;
2411}
2412
2413static int __init liquidio_vf_init(void)
2414{
2415	octeon_init_device_list(0);
2416	return pci_register_driver(&liquidio_vf_pci_driver);
2417}
2418
2419static void __exit liquidio_vf_exit(void)
2420{
2421	pci_unregister_driver(&liquidio_vf_pci_driver);
2422
2423	pr_info("LiquidIO_VF network module is now unloaded\n");
2424}
2425
2426module_init(liquidio_vf_init);
2427module_exit(liquidio_vf_exit);