nfp_net_common.c

   1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2/* Copyright (C) 2015-2019 Netronome Systems, Inc. */
   3
   4/*
   5 * nfp_net_common.c
   6 * Netronome network device driver: Common functions between PF and VF
   7 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
   8 *          Jason McMullan <jason.mcmullan@netronome.com>
   9 *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
  10 *          Brad Petrus <brad.petrus@netronome.com>
  11 *          Chris Telfer <chris.telfer@netronome.com>
  12 */
  13
  14#include <linux/bitfield.h>
  15#include <linux/bpf.h>
  16#include <linux/module.h>
  17#include <linux/kernel.h>
  18#include <linux/init.h>
  19#include <linux/fs.h>
  20#include <linux/netdevice.h>
  21#include <linux/etherdevice.h>
  22#include <linux/interrupt.h>
  23#include <linux/ip.h>
  24#include <linux/ipv6.h>
  25#include <linux/mm.h>
  26#include <linux/overflow.h>
  27#include <linux/page_ref.h>
  28#include <linux/pci.h>
  29#include <linux/pci_regs.h>
  30#include <linux/ethtool.h>
  31#include <linux/log2.h>
  32#include <linux/if_vlan.h>
  33#include <linux/if_bridge.h>
  34#include <linux/random.h>
  35#include <linux/vmalloc.h>
  36#include <linux/ktime.h>
  37
  38#include <net/tls.h>
  39#include <net/vxlan.h>
  40#include <net/xdp_sock_drv.h>
  41#include <net/xfrm.h>
  42
  43#include "nfpcore/nfp_dev.h"
  44#include "nfpcore/nfp_nsp.h"
  45#include "ccm.h"
  46#include "nfp_app.h"
  47#include "nfp_net_ctrl.h"
  48#include "nfp_net.h"
  49#include "nfp_net_dp.h"
  50#include "nfp_net_sriov.h"
  51#include "nfp_net_xsk.h"
  52#include "nfp_port.h"
  53#include "crypto/crypto.h"
  54#include "crypto/fw.h"
  55
  56static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr);
  57
  58/**
  59 * nfp_net_get_fw_version() - Read and parse the FW version
  60 * @fw_ver:	Output fw_version structure to read to
  61 * @ctrl_bar:	Mapped address of the control BAR
  62 */
  63void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
  64			    void __iomem *ctrl_bar)
  65{
  66	u32 reg;
  67
  68	reg = readl(ctrl_bar + NFP_NET_CFG_VERSION);
  69	put_unaligned_le32(reg, fw_ver);
  70}
  71
  72u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue)
  73{
  74	queue &= dev_info->qc_idx_mask;
  75	return dev_info->qc_addr_offset + NFP_QCP_QUEUE_ADDR_SZ * queue;
  76}
  77
  78/* Firmware reconfig
  79 *
  80 * Firmware reconfig may take a while so we have two versions of it -
  81 * synchronous and asynchronous (posted).  All synchronous callers are holding
  82 * RTNL so we don't have to worry about serializing them.
  83 */
  84static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update)
  85{
  86	nn_writel(nn, NFP_NET_CFG_UPDATE, update);
  87	/* ensure update is written before pinging HW */
  88	nn_pci_flush(nn);
  89	nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1);
  90	nn->reconfig_in_progress_update = update;
  91}
  92
  93/* Pass 0 as update to run posted reconfigs. */
  94static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update)
  95{
  96	update |= nn->reconfig_posted;
  97	nn->reconfig_posted = 0;
  98
  99	nfp_net_reconfig_start(nn, update);
 100
 101	nn->reconfig_timer_active = true;
 102	mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ);
 103}
 104
 105static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check)
 106{
 107	u32 reg;
 108
 109	reg = nn_readl(nn, NFP_NET_CFG_UPDATE);
 110	if (reg == 0)
 111		return true;
 112	if (reg & NFP_NET_CFG_UPDATE_ERR) {
 113		nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
 114		       reg, nn->reconfig_in_progress_update,
 115		       nn_readl(nn, NFP_NET_CFG_CTRL));
 116		return true;
 117	} else if (last_check) {
 118		nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
 119		       reg, nn->reconfig_in_progress_update,
 120		       nn_readl(nn, NFP_NET_CFG_CTRL));
 121		return true;
 122	}
 123
 124	return false;
 125}
 126
 127static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
 128{
 129	bool timed_out = false;
 130	int i;
 131
 132	/* Poll update field, waiting for NFP to ack the config.
 133	 * Do an opportunistic wait-busy loop, afterward sleep.
 134	 */
 135	for (i = 0; i < 50; i++) {
 136		if (nfp_net_reconfig_check_done(nn, false))
 137			return false;
 138		udelay(4);
 139	}
 140
 141	while (!nfp_net_reconfig_check_done(nn, timed_out)) {
 142		usleep_range(250, 500);
 143		timed_out = time_is_before_eq_jiffies(deadline);
 144	}
 145
 146	return timed_out;
 147}
 148
 149static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
 150{
 151	if (__nfp_net_reconfig_wait(nn, deadline))
 152		return -EIO;
 153
 154	if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR)
 155		return -EIO;
 156
 157	return 0;
 158}
 159
 160static void nfp_net_reconfig_timer(struct timer_list *t)
 161{
 162	struct nfp_net *nn = timer_container_of(nn, t, reconfig_timer);
 163
 164	spin_lock_bh(&nn->reconfig_lock);
 165
 166	nn->reconfig_timer_active = false;
 167
 168	/* If sync caller is present it will take over from us */
 169	if (nn->reconfig_sync_present)
 170		goto done;
 171
 172	/* Read reconfig status and report errors */
 173	nfp_net_reconfig_check_done(nn, true);
 174
 175	if (nn->reconfig_posted)
 176		nfp_net_reconfig_start_async(nn, 0);
 177done:
 178	spin_unlock_bh(&nn->reconfig_lock);
 179}
 180
 181/**
 182 * nfp_net_reconfig_post() - Post async reconfig request
 183 * @nn:      NFP Net device to reconfigure
 184 * @update:  The value for the update field in the BAR config
 185 *
 186 * Record FW reconfiguration request.  Reconfiguration will be kicked off
 187 * whenever reconfiguration machinery is idle.  Multiple requests can be
 188 * merged together!
 189 */
 190static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update)
 191{
 192	spin_lock_bh(&nn->reconfig_lock);
 193
 194	/* Sync caller will kick off async reconf when it's done, just post */
 195	if (nn->reconfig_sync_present) {
 196		nn->reconfig_posted |= update;
 197		goto done;
 198	}
 199
 200	/* Opportunistically check if the previous command is done */
 201	if (!nn->reconfig_timer_active ||
 202	    nfp_net_reconfig_check_done(nn, false))
 203		nfp_net_reconfig_start_async(nn, update);
 204	else
 205		nn->reconfig_posted |= update;
 206done:
 207	spin_unlock_bh(&nn->reconfig_lock);
 208}
 209
 210static void nfp_net_reconfig_sync_enter(struct nfp_net *nn)
 211{
 212	bool cancelled_timer = false;
 213	u32 pre_posted_requests;
 214
 215	spin_lock_bh(&nn->reconfig_lock);
 216
 217	WARN_ON(nn->reconfig_sync_present);
 218	nn->reconfig_sync_present = true;
 219
 220	if (nn->reconfig_timer_active) {
 221		nn->reconfig_timer_active = false;
 222		cancelled_timer = true;
 223	}
 224	pre_posted_requests = nn->reconfig_posted;
 225	nn->reconfig_posted = 0;
 226
 227	spin_unlock_bh(&nn->reconfig_lock);
 228
 229	if (cancelled_timer) {
 230		timer_delete_sync(&nn->reconfig_timer);
 231		nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires);
 232	}
 233
 234	/* Run the posted reconfigs which were issued before we started */
 235	if (pre_posted_requests) {
 236		nfp_net_reconfig_start(nn, pre_posted_requests);
 237		nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
 238	}
 239}
 240
 241static void nfp_net_reconfig_wait_posted(struct nfp_net *nn)
 242{
 243	nfp_net_reconfig_sync_enter(nn);
 244
 245	spin_lock_bh(&nn->reconfig_lock);
 246	nn->reconfig_sync_present = false;
 247	spin_unlock_bh(&nn->reconfig_lock);
 248}
 249
 250/**
 251 * __nfp_net_reconfig() - Reconfigure the firmware
 252 * @nn:      NFP Net device to reconfigure
 253 * @update:  The value for the update field in the BAR config
 254 *
 255 * Write the update word to the BAR and ping the reconfig queue.  The
 256 * poll until the firmware has acknowledged the update by zeroing the
 257 * update word.
 258 *
 259 * Return: Negative errno on error, 0 on success
 260 */
 261int __nfp_net_reconfig(struct nfp_net *nn, u32 update)
 262{
 263	int ret;
 264
 265	nfp_net_reconfig_sync_enter(nn);
 266
 267	nfp_net_reconfig_start(nn, update);
 268	ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
 269
 270	spin_lock_bh(&nn->reconfig_lock);
 271
 272	if (nn->reconfig_posted)
 273		nfp_net_reconfig_start_async(nn, 0);
 274
 275	nn->reconfig_sync_present = false;
 276
 277	spin_unlock_bh(&nn->reconfig_lock);
 278
 279	return ret;
 280}
 281
 282int nfp_net_reconfig(struct nfp_net *nn, u32 update)
 283{
 284	int ret;
 285
 286	nn_ctrl_bar_lock(nn);
 287	ret = __nfp_net_reconfig(nn, update);
 288	nn_ctrl_bar_unlock(nn);
 289
 290	return ret;
 291}
 292
 293int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size)
 294{
 295	if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) {
 296		nn_err(nn, "mailbox too small for %u of data (%u)\n",
 297		       data_size, nn->tlv_caps.mbox_len);
 298		return -EIO;
 299	}
 300
 301	nn_ctrl_bar_lock(nn);
 302	return 0;
 303}
 304
 305/**
 306 * nfp_net_mbox_reconfig() - Reconfigure the firmware via the mailbox
 307 * @nn:        NFP Net device to reconfigure
 308 * @mbox_cmd:  The value for the mailbox command
 309 *
 310 * Helper function for mailbox updates
 311 *
 312 * Return: Negative errno on error, 0 on success
 313 */
 314int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd)
 315{
 316	u32 mbox = nn->tlv_caps.mbox_off;
 317	int ret;
 318
 319	nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
 320
 321	ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
 322	if (ret) {
 323		nn_err(nn, "Mailbox update error\n");
 324		return ret;
 325	}
 326
 327	return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
 328}
 329
 330void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd)
 331{
 332	u32 mbox = nn->tlv_caps.mbox_off;
 333
 334	nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
 335
 336	nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX);
 337}
 338
 339int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn)
 340{
 341	u32 mbox = nn->tlv_caps.mbox_off;
 342
 343	nfp_net_reconfig_wait_posted(nn);
 344
 345	return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
 346}
 347
 348int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd)
 349{
 350	int ret;
 351
 352	ret = nfp_net_mbox_reconfig(nn, mbox_cmd);
 353	nn_ctrl_bar_unlock(nn);
 354	return ret;
 355}
 356
 357/* Interrupt configuration and handling
 358 */
 359
 360/**
 361 * nfp_net_irqs_alloc() - allocates MSI-X irqs
 362 * @pdev:        PCI device structure
 363 * @irq_entries: Array to be initialized and used to hold the irq entries
 364 * @min_irqs:    Minimal acceptable number of interrupts
 365 * @wanted_irqs: Target number of interrupts to allocate
 366 *
 367 * Return: Number of irqs obtained or 0 on error.
 368 */
 369unsigned int
 370nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
 371		   unsigned int min_irqs, unsigned int wanted_irqs)
 372{
 373	unsigned int i;
 374	int got_irqs;
 375
 376	for (i = 0; i < wanted_irqs; i++)
 377		irq_entries[i].entry = i;
 378
 379	got_irqs = pci_enable_msix_range(pdev, irq_entries,
 380					 min_irqs, wanted_irqs);
 381	if (got_irqs < 0) {
 382		dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
 383			min_irqs, wanted_irqs, got_irqs);
 384		return 0;
 385	}
 386
 387	if (got_irqs < wanted_irqs)
 388		dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
 389			 wanted_irqs, got_irqs);
 390
 391	return got_irqs;
 392}
 393
 394/**
 395 * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
 396 * @nn:		 NFP Network structure
 397 * @irq_entries: Table of allocated interrupts
 398 * @n:		 Size of @irq_entries (number of entries to grab)
 399 *
 400 * After interrupts are allocated with nfp_net_irqs_alloc() this function
 401 * should be called to assign them to a specific netdev (port).
 402 */
 403void
 404nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
 405		    unsigned int n)
 406{
 407	struct nfp_net_dp *dp = &nn->dp;
 408
 409	nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
 410	dp->num_r_vecs = nn->max_r_vecs;
 411
 412	memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
 413
 414	if (dp->num_rx_rings > dp->num_r_vecs ||
 415	    dp->num_tx_rings > dp->num_r_vecs)
 416		dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n",
 417			 dp->num_rx_rings, dp->num_tx_rings,
 418			 dp->num_r_vecs);
 419
 420	dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings);
 421	dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings);
 422	dp->num_stack_tx_rings = dp->num_tx_rings;
 423}
 424
 425/**
 426 * nfp_net_irqs_disable() - Disable interrupts
 427 * @pdev:        PCI device structure
 428 *
 429 * Undoes what @nfp_net_irqs_alloc() does.
 430 */
 431void nfp_net_irqs_disable(struct pci_dev *pdev)
 432{
 433	pci_disable_msix(pdev);
 434}
 435
 436/**
 437 * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
 438 * @irq:      Interrupt
 439 * @data:     Opaque data structure
 440 *
 441 * Return: Indicate if the interrupt has been handled.
 442 */
 443static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
 444{
 445	struct nfp_net_r_vector *r_vec = data;
 446
 447	/* Currently we cannot tell if it's a rx or tx interrupt,
 448	 * since dim does not need accurate event_ctr to calculate,
 449	 * we just use this counter for both rx and tx dim.
 450	 */
 451	r_vec->event_ctr++;
 452
 453	napi_schedule_irqoff(&r_vec->napi);
 454
 455	/* The FW auto-masks any interrupt, either via the MASK bit in
 456	 * the MSI-X table or via the per entry ICR field.  So there
 457	 * is no need to disable interrupts here.
 458	 */
 459	return IRQ_HANDLED;
 460}
 461
 462static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data)
 463{
 464	struct nfp_net_r_vector *r_vec = data;
 465
 466	tasklet_schedule(&r_vec->tasklet);
 467
 468	return IRQ_HANDLED;
 469}
 470
 471/**
 472 * nfp_net_read_link_status() - Reread link status from control BAR
 473 * @nn:       NFP Network structure
 474 */
 475static void nfp_net_read_link_status(struct nfp_net *nn)
 476{
 477	unsigned long flags;
 478	bool link_up;
 479	u16 sts;
 480
 481	spin_lock_irqsave(&nn->link_status_lock, flags);
 482
 483	sts = nn_readw(nn, NFP_NET_CFG_STS);
 484	link_up = !!(sts & NFP_NET_CFG_STS_LINK);
 485
 486	if (nn->link_up == link_up)
 487		goto out;
 488
 489	nn->link_up = link_up;
 490	if (nn->port) {
 491		set_bit(NFP_PORT_CHANGED, &nn->port->flags);
 492		if (nn->port->link_cb)
 493			nn->port->link_cb(nn->port);
 494	}
 495
 496	if (nn->link_up) {
 497		netif_carrier_on(nn->dp.netdev);
 498		netdev_info(nn->dp.netdev, "NIC Link is Up\n");
 499	} else {
 500		netif_carrier_off(nn->dp.netdev);
 501		netdev_info(nn->dp.netdev, "NIC Link is Down\n");
 502	}
 503out:
 504	spin_unlock_irqrestore(&nn->link_status_lock, flags);
 505}
 506
 507/**
 508 * nfp_net_irq_lsc() - Interrupt service routine for link state changes
 509 * @irq:      Interrupt
 510 * @data:     Opaque data structure
 511 *
 512 * Return: Indicate if the interrupt has been handled.
 513 */
 514static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
 515{
 516	struct nfp_net *nn = data;
 517	struct msix_entry *entry;
 518
 519	entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
 520
 521	nfp_net_read_link_status(nn);
 522
 523	nfp_net_irq_unmask(nn, entry->entry);
 524
 525	return IRQ_HANDLED;
 526}
 527
 528/**
 529 * nfp_net_irq_exn() - Interrupt service routine for exceptions
 530 * @irq:      Interrupt
 531 * @data:     Opaque data structure
 532 *
 533 * Return: Indicate if the interrupt has been handled.
 534 */
 535static irqreturn_t nfp_net_irq_exn(int irq, void *data)
 536{
 537	struct nfp_net *nn = data;
 538
 539	nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
 540	/* XXX TO BE IMPLEMENTED */
 541	return IRQ_HANDLED;
 542}
 543
 544/**
 545 * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN)
 546 * @nn:		NFP Network structure
 547 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
 548 * @format:	printf-style format to construct the interrupt name
 549 * @name:	Pointer to allocated space for interrupt name
 550 * @name_sz:	Size of space for interrupt name
 551 * @vector_idx:	Index of MSI-X vector used for this interrupt
 552 * @handler:	IRQ handler to register for this interrupt
 553 */
 554static int
 555nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset,
 556			const char *format, char *name, size_t name_sz,
 557			unsigned int vector_idx, irq_handler_t handler)
 558{
 559	struct msix_entry *entry;
 560	int err;
 561
 562	entry = &nn->irq_entries[vector_idx];
 563
 564	snprintf(name, name_sz, format, nfp_net_name(nn));
 565	err = request_irq(entry->vector, handler, 0, name, nn);
 566	if (err) {
 567		nn_err(nn, "Failed to request IRQ %d (err=%d).\n",
 568		       entry->vector, err);
 569		return err;
 570	}
 571	nn_writeb(nn, ctrl_offset, entry->entry);
 572	nfp_net_irq_unmask(nn, entry->entry);
 573
 574	return 0;
 575}
 576
 577/**
 578 * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN)
 579 * @nn:		NFP Network structure
 580 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
 581 * @vector_idx:	Index of MSI-X vector used for this interrupt
 582 */
 583static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset,
 584				 unsigned int vector_idx)
 585{
 586	nn_writeb(nn, ctrl_offset, 0xff);
 587	nn_pci_flush(nn);
 588	free_irq(nn->irq_entries[vector_idx].vector, nn);
 589}
 590
 591struct sk_buff *
 592nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
 593	       struct sk_buff *skb, u64 *tls_handle, int *nr_frags)
 594{
 595#ifdef CONFIG_TLS_DEVICE
 596	struct nfp_net_tls_offload_ctx *ntls;
 597	struct sk_buff *nskb;
 598	bool resync_pending;
 599	u32 datalen, seq;
 600
 601	if (likely(!dp->ktls_tx))
 602		return skb;
 603	if (!tls_is_skb_tx_device_offloaded(skb))
 604		return skb;
 605
 606	datalen = skb->len - skb_tcp_all_headers(skb);
 607	seq = ntohl(tcp_hdr(skb)->seq);
 608	ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
 609	resync_pending = tls_offload_tx_resync_pending(skb->sk);
 610	if (unlikely(resync_pending || ntls->next_seq != seq)) {
 611		/* Pure ACK out of order already */
 612		if (!datalen)
 613			return skb;
 614
 615		u64_stats_update_begin(&r_vec->tx_sync);
 616		r_vec->tls_tx_fallback++;
 617		u64_stats_update_end(&r_vec->tx_sync);
 618
 619		nskb = tls_encrypt_skb(skb);
 620		if (!nskb) {
 621			u64_stats_update_begin(&r_vec->tx_sync);
 622			r_vec->tls_tx_no_fallback++;
 623			u64_stats_update_end(&r_vec->tx_sync);
 624			return NULL;
 625		}
 626		/* encryption wasn't necessary */
 627		if (nskb == skb)
 628			return skb;
 629		/* we don't re-check ring space */
 630		if (unlikely(skb_is_nonlinear(nskb))) {
 631			nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n");
 632			u64_stats_update_begin(&r_vec->tx_sync);
 633			r_vec->tx_errors++;
 634			u64_stats_update_end(&r_vec->tx_sync);
 635			dev_kfree_skb_any(nskb);
 636			return NULL;
 637		}
 638
 639		/* jump forward, a TX may have gotten lost, need to sync TX */
 640		if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4)
 641			tls_offload_tx_resync_request(nskb->sk, seq,
 642						      ntls->next_seq);
 643
 644		*nr_frags = 0;
 645		return nskb;
 646	}
 647
 648	if (datalen) {
 649		u64_stats_update_begin(&r_vec->tx_sync);
 650		if (!skb_is_gso(skb))
 651			r_vec->hw_tls_tx++;
 652		else
 653			r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs;
 654		u64_stats_update_end(&r_vec->tx_sync);
 655	}
 656
 657	memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle));
 658	ntls->next_seq += datalen;
 659#endif
 660	return skb;
 661}
 662
 663void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
 664{
 665#ifdef CONFIG_TLS_DEVICE
 666	struct nfp_net_tls_offload_ctx *ntls;
 667	u32 datalen, seq;
 668
 669	if (!tls_handle)
 670		return;
 671	if (WARN_ON_ONCE(!tls_is_skb_tx_device_offloaded(skb)))
 672		return;
 673
 674	datalen = skb->len - skb_tcp_all_headers(skb);
 675	seq = ntohl(tcp_hdr(skb)->seq);
 676
 677	ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
 678	if (ntls->next_seq == seq + datalen)
 679		ntls->next_seq = seq;
 680	else
 681		WARN_ON_ONCE(1);
 682#endif
 683}
 684
 685static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 686{
 687	struct nfp_net *nn = netdev_priv(netdev);
 688
 689	nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue);
 690}
 691
 692/* Receive processing */
 693static unsigned int
 694nfp_net_calc_fl_bufsz_data(struct nfp_net_dp *dp)
 695{
 696	unsigned int fl_bufsz = 0;
 697
 698	if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
 699		fl_bufsz += NFP_NET_MAX_PREPEND;
 700	else
 701		fl_bufsz += dp->rx_offset;
 702	fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu;
 703
 704	return fl_bufsz;
 705}
 706
 707static unsigned int nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp)
 708{
 709	unsigned int fl_bufsz;
 710
 711	fl_bufsz = NFP_NET_RX_BUF_HEADROOM;
 712	fl_bufsz += dp->rx_dma_off;
 713	fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
 714
 715	fl_bufsz = SKB_DATA_ALIGN(fl_bufsz);
 716	fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 717
 718	return fl_bufsz;
 719}
 720
 721static unsigned int nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp *dp)
 722{
 723	unsigned int fl_bufsz;
 724
 725	fl_bufsz = XDP_PACKET_HEADROOM;
 726	fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
 727
 728	return fl_bufsz;
 729}
 730
 731/* Setup and Configuration
 732 */
 733
 734/**
 735 * nfp_net_vecs_init() - Assign IRQs and setup rvecs.
 736 * @nn:		NFP Network structure
 737 */
 738static void nfp_net_vecs_init(struct nfp_net *nn)
 739{
 740	int numa_node = dev_to_node(&nn->pdev->dev);
 741	struct nfp_net_r_vector *r_vec;
 742	unsigned int r;
 743
 744	nn->lsc_handler = nfp_net_irq_lsc;
 745	nn->exn_handler = nfp_net_irq_exn;
 746
 747	for (r = 0; r < nn->max_r_vecs; r++) {
 748		struct msix_entry *entry;
 749
 750		entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
 751
 752		r_vec = &nn->r_vecs[r];
 753		r_vec->nfp_net = nn;
 754		r_vec->irq_entry = entry->entry;
 755		r_vec->irq_vector = entry->vector;
 756
 757		if (nn->dp.netdev) {
 758			r_vec->handler = nfp_net_irq_rxtx;
 759		} else {
 760			r_vec->handler = nfp_ctrl_irq_rxtx;
 761
 762			__skb_queue_head_init(&r_vec->queue);
 763			spin_lock_init(&r_vec->lock);
 764			tasklet_setup(&r_vec->tasklet, nn->dp.ops->ctrl_poll);
 765			tasklet_disable(&r_vec->tasklet);
 766		}
 767
 768		cpumask_set_cpu(cpumask_local_spread(r, numa_node), &r_vec->affinity_mask);
 769	}
 770}
 771
 772static void
 773nfp_net_napi_add(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, int idx)
 774{
 775	if (dp->netdev)
 776		netif_napi_add(dp->netdev, &r_vec->napi,
 777			       nfp_net_has_xsk_pool_slow(dp, idx) ? dp->ops->xsk_poll : dp->ops->poll);
 778	else
 779		tasklet_enable(&r_vec->tasklet);
 780}
 781
 782static void
 783nfp_net_napi_del(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec)
 784{
 785	if (dp->netdev)
 786		netif_napi_del(&r_vec->napi);
 787	else
 788		tasklet_disable(&r_vec->tasklet);
 789}
 790
 791static void
 792nfp_net_vector_assign_rings(struct nfp_net_dp *dp,
 793			    struct nfp_net_r_vector *r_vec, int idx)
 794{
 795	r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL;
 796	r_vec->tx_ring =
 797		idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL;
 798
 799	r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ?
 800		&dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL;
 801
 802	if (nfp_net_has_xsk_pool_slow(dp, idx) || r_vec->xsk_pool) {
 803		r_vec->xsk_pool = dp->xdp_prog ? dp->xsk_pools[idx] : NULL;
 804
 805		if (r_vec->xsk_pool)
 806			xsk_pool_set_rxq_info(r_vec->xsk_pool,
 807					      &r_vec->rx_ring->xdp_rxq);
 808
 809		nfp_net_napi_del(dp, r_vec);
 810		nfp_net_napi_add(dp, r_vec, idx);
 811	}
 812}
 813
 814static int
 815nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
 816		       int idx)
 817{
 818	int err;
 819
 820	nfp_net_napi_add(&nn->dp, r_vec, idx);
 821
 822	snprintf(r_vec->name, sizeof(r_vec->name),
 823		 "%s-rxtx-%d", nfp_net_name(nn), idx);
 824	err = request_irq(r_vec->irq_vector, r_vec->handler, IRQF_NO_AUTOEN,
 825			  r_vec->name, r_vec);
 826	if (err) {
 827		nfp_net_napi_del(&nn->dp, r_vec);
 828		nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
 829		return err;
 830	}
 831
 832	irq_update_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
 833
 834	nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
 835	       r_vec->irq_entry);
 836
 837	return 0;
 838}
 839
 840static void
 841nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
 842{
 843	irq_update_affinity_hint(r_vec->irq_vector, NULL);
 844	nfp_net_napi_del(&nn->dp, r_vec);
 845	free_irq(r_vec->irq_vector, r_vec);
 846}
 847
 848/**
 849 * nfp_net_rss_write_itbl() - Write RSS indirection table to device
 850 * @nn:      NFP Net device to reconfigure
 851 */
 852void nfp_net_rss_write_itbl(struct nfp_net *nn)
 853{
 854	int i;
 855
 856	for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
 857		nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
 858			  get_unaligned_le32(nn->rss_itbl + i));
 859}
 860
 861/**
 862 * nfp_net_rss_write_key() - Write RSS hash key to device
 863 * @nn:      NFP Net device to reconfigure
 864 */
 865void nfp_net_rss_write_key(struct nfp_net *nn)
 866{
 867	int i;
 868
 869	for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4)
 870		nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
 871			  get_unaligned_le32(nn->rss_key + i));
 872}
 873
 874/**
 875 * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
 876 * @nn:      NFP Net device to reconfigure
 877 */
 878void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
 879{
 880	u8 i;
 881	u32 factor;
 882	u32 value;
 883
 884	/* Compute factor used to convert coalesce '_usecs' parameters to
 885	 * ME timestamp ticks.  There are 16 ME clock cycles for each timestamp
 886	 * count.
 887	 */
 888	factor = nn->tlv_caps.me_freq_mhz / 16;
 889
 890	/* copy RX interrupt coalesce parameters */
 891	value = (nn->rx_coalesce_max_frames << 16) |
 892		(factor * nn->rx_coalesce_usecs);
 893	for (i = 0; i < nn->dp.num_rx_rings; i++)
 894		nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
 895
 896	/* copy TX interrupt coalesce parameters */
 897	value = (nn->tx_coalesce_max_frames << 16) |
 898		(factor * nn->tx_coalesce_usecs);
 899	for (i = 0; i < nn->dp.num_tx_rings; i++)
 900		nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
 901}
 902
 903/**
 904 * nfp_net_write_mac_addr() - Write mac address to the device control BAR
 905 * @nn:      NFP Net device to reconfigure
 906 * @addr:    MAC address to write
 907 *
 908 * Writes the MAC address from the netdev to the device control BAR.  Does not
 909 * perform the required reconfig.  We do a bit of byte swapping dance because
 910 * firmware is LE.
 911 */
 912static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr)
 913{
 914	nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
 915	nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
 916}
 917
 918/**
 919 * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
 920 * @nn:      NFP Net device to reconfigure
 921 *
 922 * Warning: must be fully idempotent.
 923 */
 924static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
 925{
 926	u32 new_ctrl, new_ctrl_w1, update;
 927	unsigned int r;
 928	int err;
 929
 930	new_ctrl = nn->dp.ctrl;
 931	new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
 932	update = NFP_NET_CFG_UPDATE_GEN;
 933	update |= NFP_NET_CFG_UPDATE_MSIX;
 934	update |= NFP_NET_CFG_UPDATE_RING;
 935
 936	if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
 937		new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
 938
 939	if (!(nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN)) {
 940		nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
 941		nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
 942	}
 943
 944	nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
 945	err = nfp_net_reconfig(nn, update);
 946	if (err)
 947		nn_err(nn, "Could not disable device: %d\n", err);
 948
 949	if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN) {
 950		new_ctrl_w1 = nn->dp.ctrl_w1;
 951		new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_FREELIST_EN;
 952		nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
 953		nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
 954
 955		nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
 956		err = nfp_net_reconfig(nn, update);
 957		if (err)
 958			nn_err(nn, "Could not disable FREELIST_EN: %d\n", err);
 959		nn->dp.ctrl_w1 = new_ctrl_w1;
 960	}
 961
 962	for (r = 0; r < nn->dp.num_rx_rings; r++) {
 963		nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
 964		if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx))
 965			nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]);
 966	}
 967	for (r = 0; r < nn->dp.num_tx_rings; r++)
 968		nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
 969	for (r = 0; r < nn->dp.num_r_vecs; r++)
 970		nfp_net_vec_clear_ring_data(nn, r);
 971
 972	nn->dp.ctrl = new_ctrl;
 973}
 974
 975/**
 976 * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
 977 * @nn:      NFP Net device to reconfigure
 978 */
 979static int nfp_net_set_config_and_enable(struct nfp_net *nn)
 980{
 981	u32 bufsz, new_ctrl, new_ctrl_w1, update = 0;
 982	unsigned int r;
 983	int err;
 984
 985	new_ctrl = nn->dp.ctrl;
 986	new_ctrl_w1 = nn->dp.ctrl_w1;
 987
 988	if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
 989		nfp_net_rss_write_key(nn);
 990		nfp_net_rss_write_itbl(nn);
 991		nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
 992		update |= NFP_NET_CFG_UPDATE_RSS;
 993	}
 994
 995	if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
 996		nfp_net_coalesce_write_cfg(nn);
 997		update |= NFP_NET_CFG_UPDATE_IRQMOD;
 998	}
 999
1000	for (r = 0; r < nn->dp.num_tx_rings; r++)
1001		nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
1002	for (r = 0; r < nn->dp.num_rx_rings; r++)
1003		nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
1004
1005	nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE,
1006		  U64_MAX >> (64 - nn->dp.num_tx_rings));
1007
1008	nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE,
1009		  U64_MAX >> (64 - nn->dp.num_rx_rings));
1010
1011	if (nn->dp.netdev)
1012		nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
1013
1014	nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
1015
1016	bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
1017	nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz);
1018
1019	/* Enable device
1020	 * Step 1: Replace the CTRL_ENABLE by NFP_NET_CFG_CTRL_FREELIST_EN if
1021	 * FREELIST_EN exits.
1022	 */
1023	if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN)
1024		new_ctrl_w1 |= NFP_NET_CFG_CTRL_FREELIST_EN;
1025	else
1026		new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1027	update |= NFP_NET_CFG_UPDATE_GEN;
1028	update |= NFP_NET_CFG_UPDATE_MSIX;
1029	update |= NFP_NET_CFG_UPDATE_RING;
1030	if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
1031		new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
1032
1033	/* Step 2: Send the configuration and write the freelist.
1034	 * - The freelist only need to be written once.
1035	 */
1036	nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1037	nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1038	err = nfp_net_reconfig(nn, update);
1039	if (err) {
1040		nfp_net_clear_config_and_disable(nn);
1041		return err;
1042	}
1043
1044	nn->dp.ctrl = new_ctrl;
1045	nn->dp.ctrl_w1 = new_ctrl_w1;
1046
1047	for (r = 0; r < nn->dp.num_rx_rings; r++)
1048		nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
1049
1050	/* Step 3: Do the NFP_NET_CFG_CTRL_ENABLE. Send the configuration.
1051	 */
1052	if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN) {
1053		new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1054		nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1055
1056		err = nfp_net_reconfig(nn, update);
1057		if (err) {
1058			nfp_net_clear_config_and_disable(nn);
1059			return err;
1060		}
1061		nn->dp.ctrl = new_ctrl;
1062	}
1063
1064	return 0;
1065}
1066
1067/**
1068 * nfp_net_close_stack() - Quiesce the stack (part of close)
1069 * @nn:	     NFP Net device to reconfigure
1070 */
1071static void nfp_net_close_stack(struct nfp_net *nn)
1072{
1073	struct nfp_net_r_vector *r_vec;
1074	unsigned int r;
1075
1076	disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1077	netif_carrier_off(nn->dp.netdev);
1078	nn->link_up = false;
1079
1080	for (r = 0; r < nn->dp.num_r_vecs; r++) {
1081		r_vec = &nn->r_vecs[r];
1082
1083		disable_irq(r_vec->irq_vector);
1084		napi_disable(&r_vec->napi);
1085
1086		if (r_vec->rx_ring)
1087			cancel_work_sync(&r_vec->rx_dim.work);
1088
1089		if (r_vec->tx_ring)
1090			cancel_work_sync(&r_vec->tx_dim.work);
1091	}
1092
1093	netif_tx_disable(nn->dp.netdev);
1094}
1095
1096/**
1097 * nfp_net_close_free_all() - Free all runtime resources
1098 * @nn:      NFP Net device to reconfigure
1099 */
1100static void nfp_net_close_free_all(struct nfp_net *nn)
1101{
1102	unsigned int r;
1103
1104	nfp_net_tx_rings_free(&nn->dp);
1105	nfp_net_rx_rings_free(&nn->dp);
1106
1107	for (r = 0; r < nn->dp.num_r_vecs; r++)
1108		nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1109
1110	nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1111	nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1112}
1113
1114/**
1115 * nfp_net_netdev_close() - Called when the device is downed
1116 * @netdev:      netdev structure
1117 */
1118static int nfp_net_netdev_close(struct net_device *netdev)
1119{
1120	struct nfp_net *nn = netdev_priv(netdev);
1121
1122	/* Step 1: Disable RX and TX rings from the Linux kernel perspective
1123	 */
1124	nfp_net_close_stack(nn);
1125
1126	/* Step 2: Tell NFP
1127	 */
1128	if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER)
1129		__dev_mc_unsync(netdev, nfp_net_mc_unsync);
1130
1131	nfp_net_clear_config_and_disable(nn);
1132	nfp_port_configure(netdev, false);
1133
1134	/* Step 3: Free resources
1135	 */
1136	nfp_net_close_free_all(nn);
1137
1138	nn_dbg(nn, "%s down", netdev->name);
1139	return 0;
1140}
1141
1142void nfp_ctrl_close(struct nfp_net *nn)
1143{
1144	int r;
1145
1146	rtnl_lock();
1147
1148	for (r = 0; r < nn->dp.num_r_vecs; r++) {
1149		disable_irq(nn->r_vecs[r].irq_vector);
1150		tasklet_disable(&nn->r_vecs[r].tasklet);
1151	}
1152
1153	nfp_net_clear_config_and_disable(nn);
1154
1155	nfp_net_close_free_all(nn);
1156
1157	rtnl_unlock();
1158}
1159
1160static void nfp_net_rx_dim_work(struct work_struct *work)
1161{
1162	struct nfp_net_r_vector *r_vec;
1163	unsigned int factor, value;
1164	struct dim_cq_moder moder;
1165	struct nfp_net *nn;
1166	struct dim *dim;
1167
1168	dim = container_of(work, struct dim, work);
1169	moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1170	r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim);
1171	nn = r_vec->nfp_net;
1172
1173	/* Compute factor used to convert coalesce '_usecs' parameters to
1174	 * ME timestamp ticks.  There are 16 ME clock cycles for each timestamp
1175	 * count.
1176	 */
1177	factor = nn->tlv_caps.me_freq_mhz / 16;
1178	if (nfp_net_coalesce_para_check(factor * moder.usec) ||
1179	    nfp_net_coalesce_para_check(moder.pkts))
1180		return;
1181
1182	/* copy RX interrupt coalesce parameters */
1183	value = (moder.pkts << 16) | (factor * moder.usec);
1184	nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
1185	(void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1186
1187	dim->state = DIM_START_MEASURE;
1188}
1189
1190static void nfp_net_tx_dim_work(struct work_struct *work)
1191{
1192	struct nfp_net_r_vector *r_vec;
1193	unsigned int factor, value;
1194	struct dim_cq_moder moder;
1195	struct nfp_net *nn;
1196	struct dim *dim;
1197
1198	dim = container_of(work, struct dim, work);
1199	moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
1200	r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
1201	nn = r_vec->nfp_net;
1202
1203	/* Compute factor used to convert coalesce '_usecs' parameters to
1204	 * ME timestamp ticks.  There are 16 ME clock cycles for each timestamp
1205	 * count.
1206	 */
1207	factor = nn->tlv_caps.me_freq_mhz / 16;
1208	if (nfp_net_coalesce_para_check(factor * moder.usec) ||
1209	    nfp_net_coalesce_para_check(moder.pkts))
1210		return;
1211
1212	/* copy TX interrupt coalesce parameters */
1213	value = (moder.pkts << 16) | (factor * moder.usec);
1214	nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
1215	(void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1216
1217	dim->state = DIM_START_MEASURE;
1218}
1219
1220/**
1221 * nfp_net_open_stack() - Start the device from stack's perspective
1222 * @nn:      NFP Net device to reconfigure
1223 */
1224static void nfp_net_open_stack(struct nfp_net *nn)
1225{
1226	struct nfp_net_r_vector *r_vec;
1227	unsigned int r;
1228
1229	for (r = 0; r < nn->dp.num_r_vecs; r++) {
1230		r_vec = &nn->r_vecs[r];
1231
1232		if (r_vec->rx_ring) {
1233			INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
1234			r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1235		}
1236
1237		if (r_vec->tx_ring) {
1238			INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
1239			r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1240		}
1241
1242		napi_enable(&r_vec->napi);
1243		enable_irq(r_vec->irq_vector);
1244	}
1245
1246	netif_tx_wake_all_queues(nn->dp.netdev);
1247
1248	enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1249	nfp_net_read_link_status(nn);
1250}
1251
1252static int nfp_net_open_alloc_all(struct nfp_net *nn)
1253{
1254	int err, r;
1255
1256	err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
1257				      nn->exn_name, sizeof(nn->exn_name),
1258				      NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
1259	if (err)
1260		return err;
1261	err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
1262				      nn->lsc_name, sizeof(nn->lsc_name),
1263				      NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
1264	if (err)
1265		goto err_free_exn;
1266	disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1267
1268	for (r = 0; r < nn->dp.num_r_vecs; r++) {
1269		err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1270		if (err)
1271			goto err_cleanup_vec_p;
1272	}
1273
1274	err = nfp_net_rx_rings_prepare(nn, &nn->dp);
1275	if (err)
1276		goto err_cleanup_vec;
1277
1278	err = nfp_net_tx_rings_prepare(nn, &nn->dp);
1279	if (err)
1280		goto err_free_rx_rings;
1281
1282	for (r = 0; r < nn->max_r_vecs; r++)
1283		nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1284
1285	return 0;
1286
1287err_free_rx_rings:
1288	nfp_net_rx_rings_free(&nn->dp);
1289err_cleanup_vec:
1290	r = nn->dp.num_r_vecs;
1291err_cleanup_vec_p:
1292	while (r--)
1293		nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1294	nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1295err_free_exn:
1296	nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1297	return err;
1298}
1299
1300static int nfp_net_netdev_open(struct net_device *netdev)
1301{
1302	struct nfp_net *nn = netdev_priv(netdev);
1303	int err;
1304
1305	/* Step 1: Allocate resources for rings and the like
1306	 * - Request interrupts
1307	 * - Allocate RX and TX ring resources
1308	 * - Setup initial RSS table
1309	 */
1310	err = nfp_net_open_alloc_all(nn);
1311	if (err)
1312		return err;
1313
1314	err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
1315	if (err)
1316		goto err_free_all;
1317
1318	err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
1319	if (err)
1320		goto err_free_all;
1321
1322	/* Step 2: Configure the NFP
1323	 * - Ifup the physical interface if it exists
1324	 * - Enable rings from 0 to tx_rings/rx_rings - 1.
1325	 * - Write MAC address (in case it changed)
1326	 * - Set the MTU
1327	 * - Set the Freelist buffer size
1328	 * - Enable the FW
1329	 */
1330	err = nfp_port_configure(netdev, true);
1331	if (err)
1332		goto err_free_all;
1333
1334	err = nfp_net_set_config_and_enable(nn);
1335	if (err)
1336		goto err_port_disable;
1337
1338	/* Step 3: Enable for kernel
1339	 * - put some freelist descriptors on each RX ring
1340	 * - enable NAPI on each ring
1341	 * - enable all TX queues
1342	 * - set link state
1343	 */
1344	nfp_net_open_stack(nn);
1345
1346	return 0;
1347
1348err_port_disable:
1349	nfp_port_configure(netdev, false);
1350err_free_all:
1351	nfp_net_close_free_all(nn);
1352	return err;
1353}
1354
1355int nfp_ctrl_open(struct nfp_net *nn)
1356{
1357	int err, r;
1358
1359	/* ring dumping depends on vNICs being opened/closed under rtnl */
1360	rtnl_lock();
1361
1362	err = nfp_net_open_alloc_all(nn);
1363	if (err)
1364		goto err_unlock;
1365
1366	err = nfp_net_set_config_and_enable(nn);
1367	if (err)
1368		goto err_free_all;
1369
1370	for (r = 0; r < nn->dp.num_r_vecs; r++)
1371		enable_irq(nn->r_vecs[r].irq_vector);
1372
1373	rtnl_unlock();
1374
1375	return 0;
1376
1377err_free_all:
1378	nfp_net_close_free_all(nn);
1379err_unlock:
1380	rtnl_unlock();
1381	return err;
1382}
1383
1384int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len,
1385				 int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *))
1386{
1387	struct nfp_mbox_amsg_entry *entry;
1388
1389	entry = kmalloc(sizeof(*entry) + len, GFP_ATOMIC);
1390	if (!entry)
1391		return -ENOMEM;
1392
1393	memcpy(entry->msg, data, len);
1394	entry->cmd = cmd;
1395	entry->cfg = cb;
1396
1397	spin_lock_bh(&nn->mbox_amsg.lock);
1398	list_add_tail(&entry->list, &nn->mbox_amsg.list);
1399	spin_unlock_bh(&nn->mbox_amsg.lock);
1400
1401	schedule_work(&nn->mbox_amsg.work);
1402
1403	return 0;
1404}
1405
1406static void nfp_net_mbox_amsg_work(struct work_struct *work)
1407{
1408	struct nfp_net *nn = container_of(work, struct nfp_net, mbox_amsg.work);
1409	struct nfp_mbox_amsg_entry *entry, *tmp;
1410	struct list_head tmp_list;
1411
1412	INIT_LIST_HEAD(&tmp_list);
1413
1414	spin_lock_bh(&nn->mbox_amsg.lock);
1415	list_splice_init(&nn->mbox_amsg.list, &tmp_list);
1416	spin_unlock_bh(&nn->mbox_amsg.lock);
1417
1418	list_for_each_entry_safe(entry, tmp, &tmp_list, list) {
1419		int err = entry->cfg(nn, entry);
1420
1421		if (err)
1422			nn_err(nn, "Config cmd %d to HW failed %d.\n", entry->cmd, err);
1423
1424		list_del(&entry->list);
1425		kfree(entry);
1426	}
1427}
1428
1429static int nfp_net_mc_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry)
1430{
1431	unsigned char *addr = entry->msg;
1432	int ret;
1433
1434	ret = nfp_net_mbox_lock(nn, NFP_NET_CFG_MULTICAST_SZ);
1435	if (ret)
1436		return ret;
1437
1438	nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_HI,
1439		  get_unaligned_be32(addr));
1440	nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_LO,
1441		  get_unaligned_be16(addr + 4));
1442
1443	return nfp_net_mbox_reconfig_and_unlock(nn, entry->cmd);
1444}
1445
1446static int nfp_net_mc_sync(struct net_device *netdev, const unsigned char *addr)
1447{
1448	struct nfp_net *nn = netdev_priv(netdev);
1449
1450	if (netdev_mc_count(netdev) > NFP_NET_CFG_MAC_MC_MAX) {
1451		nn_err(nn, "Requested number of MC addresses (%d) exceeds maximum (%d).\n",
1452		       netdev_mc_count(netdev), NFP_NET_CFG_MAC_MC_MAX);
1453		return -EINVAL;
1454	}
1455
1456	return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_ADD, addr,
1457					    NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1458}
1459
1460static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr)
1461{
1462	struct nfp_net *nn = netdev_priv(netdev);
1463
1464	return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_DEL, addr,
1465					    NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1466}
1467
1468static void nfp_net_set_rx_mode(struct net_device *netdev)
1469{
1470	struct nfp_net *nn = netdev_priv(netdev);
1471	u32 new_ctrl, new_ctrl_w1;
1472
1473	new_ctrl = nn->dp.ctrl;
1474	new_ctrl_w1 = nn->dp.ctrl_w1;
1475
1476	if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
1477		new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
1478	else
1479		new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
1480
1481	if (netdev->flags & IFF_ALLMULTI)
1482		new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_MCAST_FILTER;
1483	else
1484		new_ctrl_w1 |= nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER;
1485
1486	if (netdev->flags & IFF_PROMISC) {
1487		if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
1488			new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
1489		else
1490			nn_warn(nn, "FW does not support promiscuous mode\n");
1491	} else {
1492		new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
1493	}
1494
1495	if ((nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) &&
1496	    __dev_mc_sync(netdev, nfp_net_mc_sync, nfp_net_mc_unsync))
1497		netdev_err(netdev, "Sync mc address failed\n");
1498
1499	if (new_ctrl == nn->dp.ctrl && new_ctrl_w1 == nn->dp.ctrl_w1)
1500		return;
1501
1502	if (new_ctrl != nn->dp.ctrl)
1503		nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1504	if (new_ctrl_w1 != nn->dp.ctrl_w1)
1505		nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1506	nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
1507
1508	nn->dp.ctrl = new_ctrl;
1509	nn->dp.ctrl_w1 = new_ctrl_w1;
1510}
1511
1512static void nfp_net_rss_init_itbl(struct nfp_net *nn)
1513{
1514	int i;
1515
1516	for (i = 0; i < sizeof(nn->rss_itbl); i++)
1517		nn->rss_itbl[i] =
1518			ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
1519}
1520
1521static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
1522{
1523	struct nfp_net_dp new_dp = *dp;
1524
1525	*dp = nn->dp;
1526	nn->dp = new_dp;
1527
1528	WRITE_ONCE(nn->dp.netdev->mtu, new_dp.mtu);
1529
1530	if (!netif_is_rxfh_configured(nn->dp.netdev))
1531		nfp_net_rss_init_itbl(nn);
1532}
1533
1534static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
1535{
1536	unsigned int r;
1537	int err;
1538
1539	nfp_net_dp_swap(nn, dp);
1540
1541	for (r = 0; r <	nn->max_r_vecs; r++)
1542		nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1543
1544	err = netif_set_real_num_queues(nn->dp.netdev,
1545					nn->dp.num_stack_tx_rings,
1546					nn->dp.num_rx_rings);
1547	if (err)
1548		return err;
1549
1550	return nfp_net_set_config_and_enable(nn);
1551}
1552
1553struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
1554{
1555	struct nfp_net_dp *new;
1556
1557	new = kmalloc(sizeof(*new), GFP_KERNEL);
1558	if (!new)
1559		return NULL;
1560
1561	*new = nn->dp;
1562
1563	new->xsk_pools = kmemdup(new->xsk_pools,
1564				 array_size(nn->max_r_vecs,
1565					    sizeof(new->xsk_pools)),
1566				 GFP_KERNEL);
1567	if (!new->xsk_pools) {
1568		kfree(new);
1569		return NULL;
1570	}
1571
1572	/* Clear things which need to be recomputed */
1573	new->fl_bufsz = 0;
1574	new->tx_rings = NULL;
1575	new->rx_rings = NULL;
1576	new->num_r_vecs = 0;
1577	new->num_stack_tx_rings = 0;
1578	new->txrwb = NULL;
1579	new->txrwb_dma = 0;
1580
1581	return new;
1582}
1583
1584static void nfp_net_free_dp(struct nfp_net_dp *dp)
1585{
1586	kfree(dp->xsk_pools);
1587	kfree(dp);
1588}
1589
1590static int
1591nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
1592		     struct netlink_ext_ack *extack)
1593{
1594	unsigned int r, xsk_min_fl_bufsz;
1595
1596	/* XDP-enabled tests */
1597	if (!dp->xdp_prog)
1598		return 0;
1599	if (dp->fl_bufsz > PAGE_SIZE) {
1600		NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
1601		return -EINVAL;
1602	}
1603	if (dp->num_tx_rings > nn->max_tx_rings) {
1604		NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
1605		return -EINVAL;
1606	}
1607
1608	xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp);
1609	for (r = 0; r < nn->max_r_vecs; r++) {
1610		if (!dp->xsk_pools[r])
1611			continue;
1612
1613		if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) {
1614			NL_SET_ERR_MSG_MOD(extack,
1615					   "XSK buffer pool chunk size too small");
1616			return -EINVAL;
1617		}
1618	}
1619
1620	return 0;
1621}
1622
1623int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
1624			  struct netlink_ext_ack *extack)
1625{
1626	int r, err;
1627
1628	dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
1629
1630	dp->num_stack_tx_rings = dp->num_tx_rings;
1631	if (dp->xdp_prog)
1632		dp->num_stack_tx_rings -= dp->num_rx_rings;
1633
1634	dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
1635
1636	err = nfp_net_check_config(nn, dp, extack);
1637	if (err)
1638		goto exit_free_dp;
1639
1640	if (!netif_running(dp->netdev)) {
1641		nfp_net_dp_swap(nn, dp);
1642		err = 0;
1643		goto exit_free_dp;
1644	}
1645
1646	/* Prepare new rings */
1647	for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
1648		err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1649		if (err) {
1650			dp->num_r_vecs = r;
1651			goto err_cleanup_vecs;
1652		}
1653	}
1654
1655	err = nfp_net_rx_rings_prepare(nn, dp);
1656	if (err)
1657		goto err_cleanup_vecs;
1658
1659	err = nfp_net_tx_rings_prepare(nn, dp);
1660	if (err)
1661		goto err_free_rx;
1662
1663	/* Stop device, swap in new rings, try to start the firmware */
1664	nfp_net_close_stack(nn);
1665	nfp_net_clear_config_and_disable(nn);
1666
1667	err = nfp_net_dp_swap_enable(nn, dp);
1668	if (err) {
1669		int err2;
1670
1671		nfp_net_clear_config_and_disable(nn);
1672
1673		/* Try with old configuration and old rings */
1674		err2 = nfp_net_dp_swap_enable(nn, dp);
1675		if (err2)
1676			nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
1677			       err, err2);
1678	}
1679	for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1680		nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1681
1682	nfp_net_rx_rings_free(dp);
1683	nfp_net_tx_rings_free(dp);
1684
1685	nfp_net_open_stack(nn);
1686exit_free_dp:
1687	nfp_net_free_dp(dp);
1688
1689	return err;
1690
1691err_free_rx:
1692	nfp_net_rx_rings_free(dp);
1693err_cleanup_vecs:
1694	for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1695		nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1696	nfp_net_free_dp(dp);
1697	return err;
1698}
1699
1700static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
1701{
1702	struct nfp_net *nn = netdev_priv(netdev);
1703	struct nfp_net_dp *dp;
1704	int err;
1705
1706	err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
1707	if (err)
1708		return err;
1709
1710	dp = nfp_net_clone_dp(nn);
1711	if (!dp)
1712		return -ENOMEM;
1713
1714	dp->mtu = new_mtu;
1715
1716	return nfp_net_ring_reconfig(nn, dp, NULL);
1717}
1718
1719static int
1720nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1721{
1722	const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
1723	struct nfp_net *nn = netdev_priv(netdev);
1724	int err;
1725
1726	/* Priority tagged packets with vlan id 0 are processed by the
1727	 * NFP as untagged packets
1728	 */
1729	if (!vid)
1730		return 0;
1731
1732	err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1733	if (err)
1734		return err;
1735
1736	nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1737	nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1738		  ETH_P_8021Q);
1739
1740	return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1741}
1742
1743static int
1744nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1745{
1746	const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
1747	struct nfp_net *nn = netdev_priv(netdev);
1748	int err;
1749
1750	/* Priority tagged packets with vlan id 0 are processed by the
1751	 * NFP as untagged packets
1752	 */
1753	if (!vid)
1754		return 0;
1755
1756	err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1757	if (err)
1758		return err;
1759
1760	nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1761	nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1762		  ETH_P_8021Q);
1763
1764	return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1765}
1766
1767static void
1768nfp_net_fs_fill_v4(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr)
1769{
1770	unsigned int i;
1771
1772	union {
1773		struct {
1774			__be16 loc;
1775			u8 k_proto, m_proto;
1776			__be32 k_sip, m_sip, k_dip, m_dip;
1777			__be16 k_sport, m_sport, k_dport, m_dport;
1778		};
1779		__be32 val[7];
1780	} v4_rule;
1781
1782	nn_writel(nn, *addr, op);
1783	*addr += sizeof(u32);
1784
1785	v4_rule.loc     = cpu_to_be16(entry->loc);
1786	v4_rule.k_proto = entry->key.l4_proto;
1787	v4_rule.m_proto = entry->msk.l4_proto;
1788	v4_rule.k_sip   = entry->key.sip4;
1789	v4_rule.m_sip   = entry->msk.sip4;
1790	v4_rule.k_dip   = entry->key.dip4;
1791	v4_rule.m_dip   = entry->msk.dip4;
1792	v4_rule.k_sport = entry->key.sport;
1793	v4_rule.m_sport = entry->msk.sport;
1794	v4_rule.k_dport = entry->key.dport;
1795	v4_rule.m_dport = entry->msk.dport;
1796
1797	for (i = 0; i < ARRAY_SIZE(v4_rule.val); i++, *addr += sizeof(__be32))
1798		nn_writel(nn, *addr, be32_to_cpu(v4_rule.val[i]));
1799}
1800
1801static void
1802nfp_net_fs_fill_v6(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr)
1803{
1804	unsigned int i;
1805
1806	union {
1807		struct {
1808			__be16 loc;
1809			u8 k_proto, m_proto;
1810			__be32 k_sip[4], m_sip[4], k_dip[4], m_dip[4];
1811			__be16 k_sport, m_sport, k_dport, m_dport;
1812		};
1813		__be32 val[19];
1814	} v6_rule;
1815
1816	nn_writel(nn, *addr, op);
1817	*addr += sizeof(u32);
1818
1819	v6_rule.loc     = cpu_to_be16(entry->loc);
1820	v6_rule.k_proto = entry->key.l4_proto;
1821	v6_rule.m_proto = entry->msk.l4_proto;
1822	for (i = 0; i < 4; i++) {
1823		v6_rule.k_sip[i] = entry->key.sip6[i];
1824		v6_rule.m_sip[i] = entry->msk.sip6[i];
1825		v6_rule.k_dip[i] = entry->key.dip6[i];
1826		v6_rule.m_dip[i] = entry->msk.dip6[i];
1827	}
1828	v6_rule.k_sport = entry->key.sport;
1829	v6_rule.m_sport = entry->msk.sport;
1830	v6_rule.k_dport = entry->key.dport;
1831	v6_rule.m_dport = entry->msk.dport;
1832
1833	for (i = 0; i < ARRAY_SIZE(v6_rule.val); i++, *addr += sizeof(__be32))
1834		nn_writel(nn, *addr, be32_to_cpu(v6_rule.val[i]));
1835}
1836
1837#define NFP_FS_QUEUE_ID	GENMASK(22, 16)
1838#define NFP_FS_ACT	GENMASK(15, 0)
1839#define NFP_FS_ACT_DROP	BIT(0)
1840#define NFP_FS_ACT_Q	BIT(1)
1841static void
1842nfp_net_fs_fill_act(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 addr)
1843{
1844	u32 action = 0; /* 0 means default passthrough */
1845
1846	if (entry->action == RX_CLS_FLOW_DISC)
1847		action = NFP_FS_ACT_DROP;
1848	else if (!(entry->flow_type & FLOW_RSS))
1849		action = FIELD_PREP(NFP_FS_QUEUE_ID, entry->action) | NFP_FS_ACT_Q;
1850
1851	nn_writel(nn, addr, action);
1852}
1853
1854int nfp_net_fs_add_hw(struct nfp_net *nn, struct nfp_fs_entry *entry)
1855{
1856	u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL;
1857	int err;
1858
1859	err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ);
1860	if (err)
1861		return err;
1862
1863	switch (entry->flow_type & ~FLOW_RSS) {
1864	case TCP_V4_FLOW:
1865	case UDP_V4_FLOW:
1866	case SCTP_V4_FLOW:
1867	case IPV4_USER_FLOW:
1868		nfp_net_fs_fill_v4(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_ADD_V4, &addr);
1869		break;
1870	case TCP_V6_FLOW:
1871	case UDP_V6_FLOW:
1872	case SCTP_V6_FLOW:
1873	case IPV6_USER_FLOW:
1874		nfp_net_fs_fill_v6(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_ADD_V6, &addr);
1875		break;
1876	case ETHER_FLOW:
1877		nn_writel(nn, addr, NFP_NET_CFG_MBOX_CMD_FS_ADD_ETHTYPE);
1878		addr += sizeof(u32);
1879		nn_writew(nn, addr, be16_to_cpu(entry->key.l3_proto));
1880		addr += sizeof(u32);
1881		break;
1882	}
1883
1884	nfp_net_fs_fill_act(nn, entry, addr);
1885
1886	err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER);
1887	if (err) {
1888		nn_err(nn, "Add new fs rule failed with %d\n", err);
1889		return -EIO;
1890	}
1891
1892	return 0;
1893}
1894
1895int nfp_net_fs_del_hw(struct nfp_net *nn, struct nfp_fs_entry *entry)
1896{
1897	u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL;
1898	int err;
1899
1900	err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ);
1901	if (err)
1902		return err;
1903
1904	switch (entry->flow_type & ~FLOW_RSS) {
1905	case TCP_V4_FLOW:
1906	case UDP_V4_FLOW:
1907	case SCTP_V4_FLOW:
1908	case IPV4_USER_FLOW:
1909		nfp_net_fs_fill_v4(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_DEL_V4, &addr);
1910		break;
1911	case TCP_V6_FLOW:
1912	case UDP_V6_FLOW:
1913	case SCTP_V6_FLOW:
1914	case IPV6_USER_FLOW:
1915		nfp_net_fs_fill_v6(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_DEL_V6, &addr);
1916		break;
1917	case ETHER_FLOW:
1918		nn_writel(nn, addr, NFP_NET_CFG_MBOX_CMD_FS_DEL_ETHTYPE);
1919		addr += sizeof(u32);
1920		nn_writew(nn, addr, be16_to_cpu(entry->key.l3_proto));
1921		addr += sizeof(u32);
1922		break;
1923	}
1924
1925	nfp_net_fs_fill_act(nn, entry, addr);
1926
1927	err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER);
1928	if (err) {
1929		nn_err(nn, "Delete fs rule failed with %d\n", err);
1930		return -EIO;
1931	}
1932
1933	return 0;
1934}
1935
1936static void nfp_net_fs_clean(struct nfp_net *nn)
1937{
1938	struct nfp_fs_entry *entry, *tmp;
1939
1940	list_for_each_entry_safe(entry, tmp, &nn->fs.list, node) {
1941		nfp_net_fs_del_hw(nn, entry);
1942		list_del(&entry->node);
1943		kfree(entry);
1944	}
1945}
1946
1947static void nfp_net_stat64(struct net_device *netdev,
1948			   struct rtnl_link_stats64 *stats)
1949{
1950	struct nfp_net *nn = netdev_priv(netdev);
1951	int r;
1952
1953	/* Collect software stats */
1954	for (r = 0; r < nn->max_r_vecs; r++) {
1955		struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
1956		u64 data[3];
1957		unsigned int start;
1958
1959		do {
1960			start = u64_stats_fetch_begin(&r_vec->rx_sync);
1961			data[0] = r_vec->rx_pkts;
1962			data[1] = r_vec->rx_bytes;
1963			data[2] = r_vec->rx_drops;
1964		} while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
1965		stats->rx_packets += data[0];
1966		stats->rx_bytes += data[1];
1967		stats->rx_dropped += data[2];
1968
1969		do {
1970			start = u64_stats_fetch_begin(&r_vec->tx_sync);
1971			data[0] = r_vec->tx_pkts;
1972			data[1] = r_vec->tx_bytes;
1973			data[2] = r_vec->tx_errors;
1974		} while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
1975		stats->tx_packets += data[0];
1976		stats->tx_bytes += data[1];
1977		stats->tx_errors += data[2];
1978	}
1979
1980	/* Add in device stats */
1981	stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
1982	stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
1983	stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
1984
1985	stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
1986	stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
1987}
1988
1989static int nfp_net_set_features(struct net_device *netdev,
1990				netdev_features_t features)
1991{
1992	netdev_features_t changed = netdev->features ^ features;
1993	struct nfp_net *nn = netdev_priv(netdev);
1994	u32 new_ctrl;
1995	int err;
1996
1997	/* Assume this is not called with features we have not advertised */
1998
1999	new_ctrl = nn->dp.ctrl;
2000
2001	if (changed & NETIF_F_RXCSUM) {
2002		if (features & NETIF_F_RXCSUM)
2003			new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2004		else
2005			new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
2006	}
2007
2008	if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
2009		if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
2010			new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2011		else
2012			new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
2013	}
2014
2015	if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
2016		if (features & (NETIF_F_TSO | NETIF_F_TSO6))
2017			new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2018					      NFP_NET_CFG_CTRL_LSO;
2019		else
2020			new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
2021	}
2022
2023	if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
2024		if (features & NETIF_F_HW_VLAN_CTAG_RX)
2025			new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2026				    NFP_NET_CFG_CTRL_RXVLAN;
2027		else
2028			new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY;
2029	}
2030
2031	if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
2032		if (features & NETIF_F_HW_VLAN_CTAG_TX)
2033			new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2034				    NFP_NET_CFG_CTRL_TXVLAN;
2035		else
2036			new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY;
2037	}
2038
2039	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
2040		if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
2041			new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2042		else
2043			new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
2044	}
2045
2046	if (changed & NETIF_F_HW_VLAN_STAG_RX) {
2047		if (features & NETIF_F_HW_VLAN_STAG_RX)
2048			new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2049		else
2050			new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2051	}
2052
2053	if (changed & NETIF_F_SG) {
2054		if (features & NETIF_F_SG)
2055			new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
2056		else
2057			new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
2058	}
2059
2060	err = nfp_port_set_features(netdev, features);
2061	if (err)
2062		return err;
2063
2064	nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
2065	       netdev->features, features, changed);
2066
2067	if (new_ctrl == nn->dp.ctrl)
2068		return 0;
2069
2070	nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
2071	nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2072	err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2073	if (err)
2074		return err;
2075
2076	nn->dp.ctrl = new_ctrl;
2077
2078	return 0;
2079}
2080
2081static netdev_features_t
2082nfp_net_fix_features(struct net_device *netdev,
2083		     netdev_features_t features)
2084{
2085	if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
2086	    (features & NETIF_F_HW_VLAN_STAG_RX)) {
2087		if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2088			features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2089			netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2090			netdev_warn(netdev,
2091				    "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n");
2092		} else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) {
2093			features &= ~NETIF_F_HW_VLAN_STAG_RX;
2094			netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX;
2095			netdev_warn(netdev,
2096				    "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n");
2097		}
2098	}
2099	return features;
2100}
2101
2102static netdev_features_t
2103nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
2104		       netdev_features_t features)
2105{
2106	u8 l4_hdr;
2107
2108	/* We can't do TSO over double tagged packets (802.1AD) */
2109	features &= vlan_features_check(skb, features);
2110
2111	if (!skb->encapsulation)
2112		return features;
2113
2114	/* Ensure that inner L4 header offset fits into TX descriptor field */
2115	if (skb_is_gso(skb)) {
2116		u32 hdrlen;
2117
2118		if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
2119			hdrlen = skb_inner_transport_offset(skb) + sizeof(struct udphdr);
2120		else
2121			hdrlen = skb_inner_tcp_all_headers(skb);
2122
2123		/* Assume worst case scenario of having longest possible
2124		 * metadata prepend - 8B
2125		 */
2126		if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
2127			features &= ~NETIF_F_GSO_MASK;
2128	}
2129
2130	if (xfrm_offload(skb))
2131		return features;
2132
2133	/* VXLAN/GRE check */
2134	switch (vlan_get_protocol(skb)) {
2135	case htons(ETH_P_IP):
2136		l4_hdr = ip_hdr(skb)->protocol;
2137		break;
2138	case htons(ETH_P_IPV6):
2139		l4_hdr = ipv6_hdr(skb)->nexthdr;
2140		break;
2141	default:
2142		return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2143	}
2144
2145	if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
2146	    skb->inner_protocol != htons(ETH_P_TEB) ||
2147	    (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
2148	    (l4_hdr == IPPROTO_UDP &&
2149	     (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
2150	      sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
2151		return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2152
2153	return features;
2154}
2155
2156static int
2157nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
2158{
2159	struct nfp_net *nn = netdev_priv(netdev);
2160	int n;
2161
2162	/* If port is defined, devlink_port is registered and devlink core
2163	 * is taking care of name formatting.
2164	 */
2165	if (nn->port)
2166		return -EOPNOTSUPP;
2167
2168	if (nn->dp.is_vf || nn->vnic_no_name)
2169		return -EOPNOTSUPP;
2170
2171	n = snprintf(name, len, "n%d", nn->id);
2172	if (n >= len)
2173		return -EINVAL;
2174
2175	return 0;
2176}
2177
2178static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
2179{
2180	struct bpf_prog *prog = bpf->prog;
2181	struct nfp_net_dp *dp;
2182	int err;
2183
2184	if (!prog == !nn->dp.xdp_prog) {
2185		WRITE_ONCE(nn->dp.xdp_prog, prog);
2186		xdp_attachment_setup(&nn->xdp, bpf);
2187		return 0;
2188	}
2189
2190	dp = nfp_net_clone_dp(nn);
2191	if (!dp)
2192		return -ENOMEM;
2193
2194	dp->xdp_prog = prog;
2195	dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
2196	dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
2197	dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
2198
2199	/* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
2200	err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
2201	if (err)
2202		return err;
2203
2204	xdp_attachment_setup(&nn->xdp, bpf);
2205	return 0;
2206}
2207
2208static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
2209{
2210	int err;
2211
2212	err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
2213	if (err)
2214		return err;
2215
2216	xdp_attachment_setup(&nn->xdp_hw, bpf);
2217	return 0;
2218}
2219
2220static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
2221{
2222	struct nfp_net *nn = netdev_priv(netdev);
2223
2224	switch (xdp->command) {
2225	case XDP_SETUP_PROG:
2226		return nfp_net_xdp_setup_drv(nn, xdp);
2227	case XDP_SETUP_PROG_HW:
2228		return nfp_net_xdp_setup_hw(nn, xdp);
2229	case XDP_SETUP_XSK_POOL:
2230		return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool,
2231					      xdp->xsk.queue_id);
2232	default:
2233		return nfp_app_bpf(nn->app, nn, xdp);
2234	}
2235}
2236
2237static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
2238{
2239	struct nfp_net *nn = netdev_priv(netdev);
2240	struct sockaddr *saddr = addr;
2241	int err;
2242
2243	err = eth_prepare_mac_addr_change(netdev, addr);
2244	if (err)
2245		return err;
2246
2247	nfp_net_write_mac_addr(nn, saddr->sa_data);
2248
2249	err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
2250	if (err)
2251		return err;
2252
2253	eth_commit_mac_addr_change(netdev, addr);
2254
2255	return 0;
2256}
2257
2258static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2259				  struct net_device *dev, u32 filter_mask,
2260				  int nlflags)
2261{
2262	struct nfp_net *nn = netdev_priv(dev);
2263	u16 mode;
2264
2265	if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2266		return -EOPNOTSUPP;
2267
2268	mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ?
2269	       BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB;
2270
2271	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
2272				       nlflags, filter_mask, NULL);
2273}
2274
2275static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
2276				  u16 flags, struct netlink_ext_ack *extack)
2277{
2278	struct nfp_net *nn = netdev_priv(dev);
2279	struct nlattr *attr, *br_spec;
2280	int rem, err;
2281	u32 new_ctrl;
2282	u16 mode;
2283
2284	if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2285		return -EOPNOTSUPP;
2286
2287	br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2288	if (!br_spec)
2289		return -EINVAL;
2290
2291	nla_for_each_nested_type(attr, IFLA_BRIDGE_MODE, br_spec, rem) {
2292		new_ctrl = nn->dp.ctrl;
2293		mode = nla_get_u16(attr);
2294		if (mode == BRIDGE_MODE_VEPA)
2295			new_ctrl |= NFP_NET_CFG_CTRL_VEPA;
2296		else if (mode == BRIDGE_MODE_VEB)
2297			new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA;
2298		else
2299			return -EOPNOTSUPP;
2300
2301		if (new_ctrl == nn->dp.ctrl)
2302			return 0;
2303
2304		nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2305		err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2306		if (!err)
2307			nn->dp.ctrl = new_ctrl;
2308
2309		return err;
2310	}
2311
2312	return -EINVAL;
2313}
2314
2315const struct net_device_ops nfp_nfd3_netdev_ops = {
2316	.ndo_init		= nfp_app_ndo_init,
2317	.ndo_uninit		= nfp_app_ndo_uninit,
2318	.ndo_open		= nfp_net_netdev_open,
2319	.ndo_stop		= nfp_net_netdev_close,
2320	.ndo_start_xmit		= nfp_net_tx,
2321	.ndo_get_stats64	= nfp_net_stat64,
2322	.ndo_vlan_rx_add_vid	= nfp_net_vlan_rx_add_vid,
2323	.ndo_vlan_rx_kill_vid	= nfp_net_vlan_rx_kill_vid,
2324	.ndo_set_vf_mac         = nfp_app_set_vf_mac,
2325	.ndo_set_vf_vlan        = nfp_app_set_vf_vlan,
2326	.ndo_set_vf_rate	= nfp_app_set_vf_rate,
2327	.ndo_set_vf_spoofchk    = nfp_app_set_vf_spoofchk,
2328	.ndo_set_vf_trust	= nfp_app_set_vf_trust,
2329	.ndo_get_vf_config	= nfp_app_get_vf_config,
2330	.ndo_set_vf_link_state  = nfp_app_set_vf_link_state,
2331	.ndo_setup_tc		= nfp_port_setup_tc,
2332	.ndo_tx_timeout		= nfp_net_tx_timeout,
2333	.ndo_set_rx_mode	= nfp_net_set_rx_mode,
2334	.ndo_change_mtu		= nfp_net_change_mtu,
2335	.ndo_set_mac_address	= nfp_net_set_mac_address,
2336	.ndo_set_features	= nfp_net_set_features,
2337	.ndo_fix_features	= nfp_net_fix_features,
2338	.ndo_features_check	= nfp_net_features_check,
2339	.ndo_get_phys_port_name	= nfp_net_get_phys_port_name,
2340	.ndo_bpf		= nfp_net_xdp,
2341	.ndo_xsk_wakeup		= nfp_net_xsk_wakeup,
2342	.ndo_bridge_getlink     = nfp_net_bridge_getlink,
2343	.ndo_bridge_setlink     = nfp_net_bridge_setlink,
2344};
2345
2346const struct net_device_ops nfp_nfdk_netdev_ops = {
2347	.ndo_init		= nfp_app_ndo_init,
2348	.ndo_uninit		= nfp_app_ndo_uninit,
2349	.ndo_open		= nfp_net_netdev_open,
2350	.ndo_stop		= nfp_net_netdev_close,
2351	.ndo_start_xmit		= nfp_net_tx,
2352	.ndo_get_stats64	= nfp_net_stat64,
2353	.ndo_vlan_rx_add_vid	= nfp_net_vlan_rx_add_vid,
2354	.ndo_vlan_rx_kill_vid	= nfp_net_vlan_rx_kill_vid,
2355	.ndo_set_vf_mac         = nfp_app_set_vf_mac,
2356	.ndo_set_vf_vlan        = nfp_app_set_vf_vlan,
2357	.ndo_set_vf_rate	= nfp_app_set_vf_rate,
2358	.ndo_set_vf_spoofchk    = nfp_app_set_vf_spoofchk,
2359	.ndo_set_vf_trust	= nfp_app_set_vf_trust,
2360	.ndo_get_vf_config	= nfp_app_get_vf_config,
2361	.ndo_set_vf_link_state  = nfp_app_set_vf_link_state,
2362	.ndo_setup_tc		= nfp_port_setup_tc,
2363	.ndo_tx_timeout		= nfp_net_tx_timeout,
2364	.ndo_set_rx_mode	= nfp_net_set_rx_mode,
2365	.ndo_change_mtu		= nfp_net_change_mtu,
2366	.ndo_set_mac_address	= nfp_net_set_mac_address,
2367	.ndo_set_features	= nfp_net_set_features,
2368	.ndo_fix_features	= nfp_net_fix_features,
2369	.ndo_features_check	= nfp_net_features_check,
2370	.ndo_get_phys_port_name	= nfp_net_get_phys_port_name,
2371	.ndo_bpf		= nfp_net_xdp,
2372	.ndo_bridge_getlink     = nfp_net_bridge_getlink,
2373	.ndo_bridge_setlink     = nfp_net_bridge_setlink,
2374};
2375
2376static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
2377{
2378	struct nfp_net *nn = netdev_priv(netdev);
2379	int i;
2380
2381	BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
2382	for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
2383		struct udp_tunnel_info ti0, ti1;
2384
2385		udp_tunnel_nic_get_port(netdev, table, i, &ti0);
2386		udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
2387
2388		nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
2389			  be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
2390	}
2391
2392	return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
2393}
2394
2395static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
2396	.sync_table     = nfp_udp_tunnel_sync,
2397	.flags          = UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
2398	.tables         = {
2399		{
2400			.n_entries      = NFP_NET_N_VXLAN_PORTS,
2401			.tunnel_types   = UDP_TUNNEL_TYPE_VXLAN,
2402		},
2403	},
2404};
2405
2406/**
2407 * nfp_net_info() - Print general info about the NIC
2408 * @nn:      NFP Net device to reconfigure
2409 */
2410void nfp_net_info(struct nfp_net *nn)
2411{
2412	nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
2413		nn->dp.is_vf ? "VF " : "",
2414		nn->dp.num_tx_rings, nn->max_tx_rings,
2415		nn->dp.num_rx_rings, nn->max_rx_rings);
2416	nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
2417		nn->fw_ver.extend, nn->fw_ver.class,
2418		nn->fw_ver.major, nn->fw_ver.minor,
2419		nn->max_mtu);
2420	nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
2421		nn->cap,
2422		nn->cap & NFP_NET_CFG_CTRL_PROMISC  ? "PROMISC "  : "",
2423		nn->cap & NFP_NET_CFG_CTRL_L2BC     ? "L2BCFILT " : "",
2424		nn->cap & NFP_NET_CFG_CTRL_L2MC     ? "L2MCFILT " : "",
2425		nn->cap & NFP_NET_CFG_CTRL_RXCSUM   ? "RXCSUM "   : "",
2426		nn->cap & NFP_NET_CFG_CTRL_TXCSUM   ? "TXCSUM "   : "",
2427		nn->cap & NFP_NET_CFG_CTRL_RXVLAN   ? "RXVLAN "   : "",
2428		nn->cap & NFP_NET_CFG_CTRL_TXVLAN   ? "TXVLAN "   : "",
2429		nn->cap & NFP_NET_CFG_CTRL_RXQINQ   ? "RXQINQ "   : "",
2430		nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 "   : "",
2431		nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2   ? "TXVLANv2 "   : "",
2432		nn->cap & NFP_NET_CFG_CTRL_SCATTER  ? "SCATTER "  : "",
2433		nn->cap & NFP_NET_CFG_CTRL_GATHER   ? "GATHER "   : "",
2434		nn->cap & NFP_NET_CFG_CTRL_LSO      ? "TSO1 "     : "",
2435		nn->cap & NFP_NET_CFG_CTRL_LSO2     ? "TSO2 "     : "",
2436		nn->cap & NFP_NET_CFG_CTRL_RSS      ? "RSS1 "     : "",
2437		nn->cap & NFP_NET_CFG_CTRL_RSS2     ? "RSS2 "     : "",
2438		nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
2439		nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
2440		nn->cap & NFP_NET_CFG_CTRL_IRQMOD   ? "IRQMOD "   : "",
2441		nn->cap & NFP_NET_CFG_CTRL_TXRWB    ? "TXRWB "    : "",
2442		nn->cap & NFP_NET_CFG_CTRL_VEPA     ? "VEPA "     : "",
2443		nn->cap & NFP_NET_CFG_CTRL_VXLAN    ? "VXLAN "    : "",
2444		nn->cap & NFP_NET_CFG_CTRL_NVGRE    ? "NVGRE "	  : "",
2445		nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
2446						      "RXCSUM_COMPLETE " : "",
2447		nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
2448		nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER ? "MULTICAST_FILTER " : "",
2449		nn->cap_w1 & NFP_NET_CFG_CTRL_USO ? "USO " : "",
2450		nfp_app_extra_cap(nn->app, nn));
2451}
2452
2453/**
2454 * nfp_net_alloc() - Allocate netdev and related structure
2455 * @pdev:         PCI device
2456 * @dev_info:     NFP ASIC params
2457 * @ctrl_bar:     PCI IOMEM with vNIC config memory
2458 * @needs_netdev: Whether to allocate a netdev for this vNIC
2459 * @max_tx_rings: Maximum number of TX rings supported by device
2460 * @max_rx_rings: Maximum number of RX rings supported by device
2461 *
2462 * This function allocates a netdev device and fills in the initial
2463 * part of the @struct nfp_net structure.  In case of control device
2464 * nfp_net structure is allocated without the netdev.
2465 *
2466 * Return: NFP Net device structure, or ERR_PTR on error.
2467 */
2468struct nfp_net *
2469nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
2470	      void __iomem *ctrl_bar, bool needs_netdev,
2471	      unsigned int max_tx_rings, unsigned int max_rx_rings)
2472{
2473	u64 dma_mask = dma_get_mask(&pdev->dev);
2474	struct nfp_net *nn;
2475	int err;
2476
2477	if (needs_netdev) {
2478		struct net_device *netdev;
2479
2480		netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
2481					    max_tx_rings, max_rx_rings);
2482		if (!netdev)
2483			return ERR_PTR(-ENOMEM);
2484
2485		SET_NETDEV_DEV(netdev, &pdev->dev);
2486		nn = netdev_priv(netdev);
2487		nn->dp.netdev = netdev;
2488	} else {
2489		nn = vzalloc(sizeof(*nn));
2490		if (!nn)
2491			return ERR_PTR(-ENOMEM);
2492	}
2493
2494	nn->dp.dev = &pdev->dev;
2495	nn->dp.ctrl_bar = ctrl_bar;
2496	nn->dev_info = dev_info;
2497	nn->pdev = pdev;
2498	nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
2499
2500	switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) {
2501	case NFP_NET_CFG_VERSION_DP_NFD3:
2502		nn->dp.ops = &nfp_nfd3_ops;
2503		break;
2504	case NFP_NET_CFG_VERSION_DP_NFDK:
2505		if (nn->fw_ver.major < 5) {
2506			dev_err(&pdev->dev,
2507				"NFDK must use ABI 5 or newer, found: %d\n",
2508				nn->fw_ver.major);
2509			err = -EINVAL;
2510			goto err_free_nn;
2511		}
2512		nn->dp.ops = &nfp_nfdk_ops;
2513		break;
2514	default:
2515		err = -EINVAL;
2516		goto err_free_nn;
2517	}
2518
2519	if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) {
2520		dev_err(&pdev->dev,
2521			"DMA mask of loaded firmware: %llx, required DMA mask: %llx\n",
2522			nn->dp.ops->dma_mask, dma_mask);
2523		err = -EINVAL;
2524		goto err_free_nn;
2525	}
2526
2527	nn->max_tx_rings = max_tx_rings;
2528	nn->max_rx_rings = max_rx_rings;
2529
2530	nn->dp.num_tx_rings = min_t(unsigned int,
2531				    max_tx_rings, num_online_cpus());
2532	nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
2533				 netif_get_num_default_rss_queues());
2534
2535	nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
2536	nn->dp.num_r_vecs = min_t(unsigned int,
2537				  nn->dp.num_r_vecs, num_online_cpus());
2538	nn->max_r_vecs = nn->dp.num_r_vecs;
2539
2540	nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(*nn->dp.xsk_pools),
2541				   GFP_KERNEL);
2542	if (!nn->dp.xsk_pools) {
2543		err = -ENOMEM;
2544		goto err_free_nn;
2545	}
2546
2547	nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
2548	nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
2549
2550	sema_init(&nn->bar_lock, 1);
2551
2552	spin_lock_init(&nn->reconfig_lock);
2553	spin_lock_init(&nn->link_status_lock);
2554
2555	timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
2556
2557	err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
2558				     &nn->tlv_caps);
2559	if (err)
2560		goto err_free_xsk_pools;
2561
2562	err = nfp_ccm_mbox_alloc(nn);
2563	if (err)
2564		goto err_free_xsk_pools;
2565
2566	return nn;
2567
2568err_free_xsk_pools:
2569	kfree(nn->dp.xsk_pools);
2570err_free_nn:
2571	if (nn->dp.netdev)
2572		free_netdev(nn->dp.netdev);
2573	else
2574		vfree(nn);
2575	return ERR_PTR(err);
2576}
2577
2578/**
2579 * nfp_net_free() - Undo what @nfp_net_alloc() did
2580 * @nn:      NFP Net device to reconfigure
2581 */
2582void nfp_net_free(struct nfp_net *nn)
2583{
2584	WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted);
2585	nfp_ccm_mbox_free(nn);
2586
2587	kfree(nn->dp.xsk_pools);
2588	if (nn->dp.netdev)
2589		free_netdev(nn->dp.netdev);
2590	else
2591		vfree(nn);
2592}
2593
2594/**
2595 * nfp_net_rss_key_sz() - Get current size of the RSS key
2596 * @nn:		NFP Net device instance
2597 *
2598 * Return: size of the RSS key for currently selected hash function.
2599 */
2600unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
2601{
2602	switch (nn->rss_hfunc) {
2603	case ETH_RSS_HASH_TOP:
2604		return NFP_NET_CFG_RSS_KEY_SZ;
2605	case ETH_RSS_HASH_XOR:
2606		return 0;
2607	case ETH_RSS_HASH_CRC32:
2608		return 4;
2609	}
2610
2611	nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
2612	return 0;
2613}
2614
2615/**
2616 * nfp_net_rss_init() - Set the initial RSS parameters
2617 * @nn:	     NFP Net device to reconfigure
2618 */
2619static void nfp_net_rss_init(struct nfp_net *nn)
2620{
2621	unsigned long func_bit, rss_cap_hfunc;
2622	u32 reg;
2623
2624	/* Read the RSS function capability and select first supported func */
2625	reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
2626	rss_cap_hfunc =	FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
2627	if (!rss_cap_hfunc)
2628		rss_cap_hfunc =	FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
2629					  NFP_NET_CFG_RSS_TOEPLITZ);
2630
2631	func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
2632	if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
2633		dev_warn(nn->dp.dev,
2634			 "Bad RSS config, defaulting to Toeplitz hash\n");
2635		func_bit = ETH_RSS_HASH_TOP_BIT;
2636	}
2637	nn->rss_hfunc = 1 << func_bit;
2638
2639	netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
2640
2641	nfp_net_rss_init_itbl(nn);
2642
2643	/* Enable IPv4/IPv6 TCP by default */
2644	nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
2645		      NFP_NET_CFG_RSS_IPV6_TCP |
2646		      NFP_NET_CFG_RSS_IPV4_UDP |
2647		      NFP_NET_CFG_RSS_IPV6_UDP |
2648		      FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
2649		      NFP_NET_CFG_RSS_MASK;
2650}
2651
2652/**
2653 * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
2654 * @nn:	     NFP Net device to reconfigure
2655 */
2656static void nfp_net_irqmod_init(struct nfp_net *nn)
2657{
2658	nn->rx_coalesce_usecs      = 50;
2659	nn->rx_coalesce_max_frames = 64;
2660	nn->tx_coalesce_usecs      = 50;
2661	nn->tx_coalesce_max_frames = 64;
2662
2663	nn->rx_coalesce_adapt_on   = true;
2664	nn->tx_coalesce_adapt_on   = true;
2665}
2666
2667static void nfp_net_netdev_init(struct nfp_net *nn)
2668{
2669	struct net_device *netdev = nn->dp.netdev;
2670
2671	nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
2672
2673	netdev->mtu = nn->dp.mtu;
2674
2675	/* Advertise/enable offloads based on capabilities
2676	 *
2677	 * Note: netdev->features show the currently enabled features
2678	 * and netdev->hw_features advertises which features are
2679	 * supported.  By default we enable most features.
2680	 */
2681	if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
2682		netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2683
2684	netdev->hw_features = NETIF_F_HIGHDMA;
2685	if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
2686		netdev->hw_features |= NETIF_F_RXCSUM;
2687		nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2688	}
2689	if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
2690		netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2691		nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2692	}
2693	if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
2694		netdev->hw_features |= NETIF_F_SG;
2695		nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
2696	}
2697	if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
2698	    nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2699		netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2700		if (nn->cap_w1 & NFP_NET_CFG_CTRL_USO)
2701			netdev->hw_features |= NETIF_F_GSO_UDP_L4;
2702		nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2703					 NFP_NET_CFG_CTRL_LSO;
2704	}
2705	if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
2706		netdev->hw_features |= NETIF_F_RXHASH;
2707
2708#ifdef CONFIG_NFP_NET_IPSEC
2709	if (nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC)
2710		netdev->hw_features |= NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM;
2711#endif
2712
2713	if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
2714		if (nn->cap & NFP_NET_CFG_CTRL_LSO) {
2715			netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
2716					       NETIF_F_GSO_UDP_TUNNEL_CSUM |
2717					       NETIF_F_GSO_PARTIAL;
2718			netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
2719		}
2720		netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
2721		nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
2722	}
2723	if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
2724		if (nn->cap & NFP_NET_CFG_CTRL_LSO)
2725			netdev->hw_features |= NETIF_F_GSO_GRE;
2726		nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE;
2727	}
2728	if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
2729		netdev->hw_enc_features = netdev->hw_features;
2730
2731	netdev->vlan_features = netdev->hw_features;
2732
2733	if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) {
2734		netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
2735		nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2736			       NFP_NET_CFG_CTRL_RXVLAN;
2737	}
2738	if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) {
2739		if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2740			nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
2741		} else {
2742			netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
2743			nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2744				       NFP_NET_CFG_CTRL_TXVLAN;
2745		}
2746	}
2747	if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
2748		netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2749		nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2750	}
2751	if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) {
2752		netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
2753		nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2754	}
2755
2756	netdev->features = netdev->hw_features;
2757
2758	if (nfp_app_has_tc(nn->app) && nn->port)
2759		netdev->hw_features |= NETIF_F_HW_TC;
2760
2761	/* C-Tag strip and S-Tag strip can't be supported simultaneously,
2762	 * so enable C-Tag strip and disable S-Tag strip by default.
2763	 */
2764	netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX;
2765	nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2766
2767	netdev->xdp_features = NETDEV_XDP_ACT_BASIC;
2768	if (nn->app && nn->app->type->id == NFP_APP_BPF_NIC)
2769		netdev->xdp_features |= NETDEV_XDP_ACT_HW_OFFLOAD;
2770
2771	/* Finalise the netdev setup */
2772	switch (nn->dp.ops->version) {
2773	case NFP_NFD_VER_NFD3:
2774		netdev->netdev_ops = &nfp_nfd3_netdev_ops;
2775		netdev->xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY;
2776		netdev->xdp_features |= NETDEV_XDP_ACT_REDIRECT;
2777		break;
2778	case NFP_NFD_VER_NFDK:
2779		netdev->netdev_ops = &nfp_nfdk_netdev_ops;
2780		break;
2781	}
2782
2783	netdev->watchdog_timeo = secs_to_jiffies(5);
2784
2785	/* MTU range: 68 - hw-specific max */
2786	netdev->min_mtu = ETH_MIN_MTU;
2787	netdev->max_mtu = nn->max_mtu;
2788
2789	netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
2790
2791	netif_carrier_off(netdev);
2792
2793	nfp_net_set_ethtool_ops(netdev);
2794}
2795
2796static int nfp_net_read_caps(struct nfp_net *nn)
2797{
2798	/* Get some of the read-only fields from the BAR */
2799	nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
2800	nn->cap_w1 = nn_readl(nn, NFP_NET_CFG_CAP_WORD1);
2801	nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
2802
2803	/* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
2804	 * we allow use of non-chained metadata if RSS(v1) is the only
2805	 * advertised capability requiring metadata.
2806	 */
2807	nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
2808					 !nn->dp.netdev ||
2809					 !(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
2810					 nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
2811	/* RSS(v1) uses non-chained metadata format, except in ABI 4.x where
2812	 * it has the same meaning as RSSv2.
2813	 */
2814	if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
2815		nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
2816
2817	/* Determine RX packet/metadata boundary offset */
2818	if (nn->fw_ver.major >= 2) {
2819		u32 reg;
2820
2821		reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
2822		if (reg > NFP_NET_MAX_PREPEND) {
2823			nn_err(nn, "Invalid rx offset: %d\n", reg);
2824			return -EINVAL;
2825		}
2826		nn->dp.rx_offset = reg;
2827	} else {
2828		nn->dp.rx_offset = NFP_NET_RX_OFFSET;
2829	}
2830
2831	/* Mask out NFD-version-specific features */
2832	nn->cap &= nn->dp.ops->cap_mask;
2833
2834	/* For control vNICs mask out the capabilities app doesn't want. */
2835	if (!nn->dp.netdev)
2836		nn->cap &= nn->app->type->ctrl_cap_mask;
2837
2838	return 0;
2839}
2840
2841/**
2842 * nfp_net_init() - Initialise/finalise the nfp_net structure
2843 * @nn:		NFP Net device structure
2844 *
2845 * Return: 0 on success or negative errno on error.
2846 */
2847int nfp_net_init(struct nfp_net *nn)
2848{
2849	int err;
2850
2851	nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
2852
2853	err = nfp_net_read_caps(nn);
2854	if (err)
2855		return err;
2856
2857	/* Set default MTU and Freelist buffer size */
2858	if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) {
2859		nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu);
2860	} else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) {
2861		nn->dp.mtu = nn->max_mtu;
2862	} else {
2863		nn->dp.mtu = NFP_NET_DEFAULT_MTU;
2864	}
2865	nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
2866
2867	if (nfp_app_ctrl_uses_data_vnics(nn->app))
2868		nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA;
2869
2870	if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
2871		nfp_net_rss_init(nn);
2872		nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
2873					 NFP_NET_CFG_CTRL_RSS;
2874	}
2875
2876	/* Allow L2 Broadcast and Multicast through by default, if supported */
2877	if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
2878		nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
2879
2880	/* Allow IRQ moderation, if supported */
2881	if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
2882		nfp_net_irqmod_init(nn);
2883		nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
2884	}
2885
2886	/* Enable TX pointer writeback, if supported */
2887	if (nn->cap & NFP_NET_CFG_CTRL_TXRWB)
2888		nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB;
2889
2890	if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER)
2891		nn->dp.ctrl_w1 |= NFP_NET_CFG_CTRL_MCAST_FILTER;
2892
2893	/* Stash the re-configuration queue away.  First odd queue in TX Bar */
2894	nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
2895
2896	/* Make sure the FW knows the netdev is supposed to be disabled here */
2897	nn_writel(nn, NFP_NET_CFG_CTRL, 0);
2898	nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
2899	nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
2900	nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, 0);
2901	err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
2902				   NFP_NET_CFG_UPDATE_GEN);
2903	if (err)
2904		return err;
2905
2906	if (nn->dp.netdev) {
2907		nfp_net_netdev_init(nn);
2908
2909		err = nfp_ccm_mbox_init(nn);
2910		if (err)
2911			return err;
2912
2913		err = nfp_net_tls_init(nn);
2914		if (err)
2915			goto err_clean_mbox;
2916
2917		nfp_net_ipsec_init(nn);
2918	}
2919
2920	nfp_net_vecs_init(nn);
2921
2922	if (!nn->dp.netdev)
2923		return 0;
2924
2925	spin_lock_init(&nn->mbox_amsg.lock);
2926	INIT_LIST_HEAD(&nn->mbox_amsg.list);
2927	INIT_WORK(&nn->mbox_amsg.work, nfp_net_mbox_amsg_work);
2928
2929	INIT_LIST_HEAD(&nn->fs.list);
2930
2931	return register_netdev(nn->dp.netdev);
2932
2933err_clean_mbox:
2934	nfp_ccm_mbox_clean(nn);
2935	return err;
2936}
2937
2938/**
2939 * nfp_net_clean() - Undo what nfp_net_init() did.
2940 * @nn:		NFP Net device structure
2941 */
2942void nfp_net_clean(struct nfp_net *nn)
2943{
2944	if (!nn->dp.netdev)
2945		return;
2946
2947	unregister_netdev(nn->dp.netdev);
2948	nfp_net_ipsec_clean(nn);
2949	nfp_ccm_mbox_clean(nn);
2950	nfp_net_fs_clean(nn);
2951	flush_work(&nn->mbox_amsg.work);
2952	nfp_net_reconfig_wait_posted(nn);
2953}