1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2015-2019 Netronome Systems, Inc. */
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>
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>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
22 #include <linux/interrupt.h>
24 #include <linux/ipv6.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>
39 #include <net/vxlan.h>
40 #include <net/xdp_sock_drv.h>
43 #include "nfpcore/nfp_dev.h"
44 #include "nfpcore/nfp_nsp.h"
47 #include "nfp_net_ctrl.h"
49 #include "nfp_net_dp.h"
50 #include "nfp_net_sriov.h"
51 #include "nfp_net_xsk.h"
53 #include "crypto/crypto.h"
54 #include "crypto/fw.h"
57 * nfp_net_get_fw_version() - Read and parse the FW version
58 * @fw_ver: Output fw_version structure to read to
59 * @ctrl_bar: Mapped address of the control BAR
61 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
62 void __iomem *ctrl_bar)
66 reg = readl(ctrl_bar + NFP_NET_CFG_VERSION);
67 put_unaligned_le32(reg, fw_ver);
70 u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue)
72 queue &= dev_info->qc_idx_mask;
73 return dev_info->qc_addr_offset + NFP_QCP_QUEUE_ADDR_SZ * queue;
78 * Firmware reconfig may take a while so we have two versions of it -
79 * synchronous and asynchronous (posted). All synchronous callers are holding
80 * RTNL so we don't have to worry about serializing them.
82 static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update)
84 nn_writel(nn, NFP_NET_CFG_UPDATE, update);
85 /* ensure update is written before pinging HW */
87 nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1);
88 nn->reconfig_in_progress_update = update;
91 /* Pass 0 as update to run posted reconfigs. */
92 static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update)
94 update |= nn->reconfig_posted;
95 nn->reconfig_posted = 0;
97 nfp_net_reconfig_start(nn, update);
99 nn->reconfig_timer_active = true;
100 mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ);
103 static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check)
107 reg = nn_readl(nn, NFP_NET_CFG_UPDATE);
110 if (reg & NFP_NET_CFG_UPDATE_ERR) {
111 nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
112 reg, nn->reconfig_in_progress_update,
113 nn_readl(nn, NFP_NET_CFG_CTRL));
115 } else if (last_check) {
116 nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
117 reg, nn->reconfig_in_progress_update,
118 nn_readl(nn, NFP_NET_CFG_CTRL));
125 static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
127 bool timed_out = false;
130 /* Poll update field, waiting for NFP to ack the config.
131 * Do an opportunistic wait-busy loop, afterward sleep.
133 for (i = 0; i < 50; i++) {
134 if (nfp_net_reconfig_check_done(nn, false))
139 while (!nfp_net_reconfig_check_done(nn, timed_out)) {
140 usleep_range(250, 500);
141 timed_out = time_is_before_eq_jiffies(deadline);
147 static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
149 if (__nfp_net_reconfig_wait(nn, deadline))
152 if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR)
158 static void nfp_net_reconfig_timer(struct timer_list *t)
160 struct nfp_net *nn = from_timer(nn, t, reconfig_timer);
162 spin_lock_bh(&nn->reconfig_lock);
164 nn->reconfig_timer_active = false;
166 /* If sync caller is present it will take over from us */
167 if (nn->reconfig_sync_present)
170 /* Read reconfig status and report errors */
171 nfp_net_reconfig_check_done(nn, true);
173 if (nn->reconfig_posted)
174 nfp_net_reconfig_start_async(nn, 0);
176 spin_unlock_bh(&nn->reconfig_lock);
180 * nfp_net_reconfig_post() - Post async reconfig request
181 * @nn: NFP Net device to reconfigure
182 * @update: The value for the update field in the BAR config
184 * Record FW reconfiguration request. Reconfiguration will be kicked off
185 * whenever reconfiguration machinery is idle. Multiple requests can be
188 static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update)
190 spin_lock_bh(&nn->reconfig_lock);
192 /* Sync caller will kick off async reconf when it's done, just post */
193 if (nn->reconfig_sync_present) {
194 nn->reconfig_posted |= update;
198 /* Opportunistically check if the previous command is done */
199 if (!nn->reconfig_timer_active ||
200 nfp_net_reconfig_check_done(nn, false))
201 nfp_net_reconfig_start_async(nn, update);
203 nn->reconfig_posted |= update;
205 spin_unlock_bh(&nn->reconfig_lock);
208 static void nfp_net_reconfig_sync_enter(struct nfp_net *nn)
210 bool cancelled_timer = false;
211 u32 pre_posted_requests;
213 spin_lock_bh(&nn->reconfig_lock);
215 WARN_ON(nn->reconfig_sync_present);
216 nn->reconfig_sync_present = true;
218 if (nn->reconfig_timer_active) {
219 nn->reconfig_timer_active = false;
220 cancelled_timer = true;
222 pre_posted_requests = nn->reconfig_posted;
223 nn->reconfig_posted = 0;
225 spin_unlock_bh(&nn->reconfig_lock);
227 if (cancelled_timer) {
228 del_timer_sync(&nn->reconfig_timer);
229 nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires);
232 /* Run the posted reconfigs which were issued before we started */
233 if (pre_posted_requests) {
234 nfp_net_reconfig_start(nn, pre_posted_requests);
235 nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
239 static void nfp_net_reconfig_wait_posted(struct nfp_net *nn)
241 nfp_net_reconfig_sync_enter(nn);
243 spin_lock_bh(&nn->reconfig_lock);
244 nn->reconfig_sync_present = false;
245 spin_unlock_bh(&nn->reconfig_lock);
249 * __nfp_net_reconfig() - Reconfigure the firmware
250 * @nn: NFP Net device to reconfigure
251 * @update: The value for the update field in the BAR config
253 * Write the update word to the BAR and ping the reconfig queue. The
254 * poll until the firmware has acknowledged the update by zeroing the
257 * Return: Negative errno on error, 0 on success
259 int __nfp_net_reconfig(struct nfp_net *nn, u32 update)
263 nfp_net_reconfig_sync_enter(nn);
265 nfp_net_reconfig_start(nn, update);
266 ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
268 spin_lock_bh(&nn->reconfig_lock);
270 if (nn->reconfig_posted)
271 nfp_net_reconfig_start_async(nn, 0);
273 nn->reconfig_sync_present = false;
275 spin_unlock_bh(&nn->reconfig_lock);
280 int nfp_net_reconfig(struct nfp_net *nn, u32 update)
284 nn_ctrl_bar_lock(nn);
285 ret = __nfp_net_reconfig(nn, update);
286 nn_ctrl_bar_unlock(nn);
291 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size)
293 if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) {
294 nn_err(nn, "mailbox too small for %u of data (%u)\n",
295 data_size, nn->tlv_caps.mbox_len);
299 nn_ctrl_bar_lock(nn);
304 * nfp_net_mbox_reconfig() - Reconfigure the firmware via the mailbox
305 * @nn: NFP Net device to reconfigure
306 * @mbox_cmd: The value for the mailbox command
308 * Helper function for mailbox updates
310 * Return: Negative errno on error, 0 on success
312 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd)
314 u32 mbox = nn->tlv_caps.mbox_off;
317 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
319 ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
321 nn_err(nn, "Mailbox update error\n");
325 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
328 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd)
330 u32 mbox = nn->tlv_caps.mbox_off;
332 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
334 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX);
337 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn)
339 u32 mbox = nn->tlv_caps.mbox_off;
341 nfp_net_reconfig_wait_posted(nn);
343 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
346 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd)
350 ret = nfp_net_mbox_reconfig(nn, mbox_cmd);
351 nn_ctrl_bar_unlock(nn);
355 /* Interrupt configuration and handling
359 * nfp_net_irqs_alloc() - allocates MSI-X irqs
360 * @pdev: PCI device structure
361 * @irq_entries: Array to be initialized and used to hold the irq entries
362 * @min_irqs: Minimal acceptable number of interrupts
363 * @wanted_irqs: Target number of interrupts to allocate
365 * Return: Number of irqs obtained or 0 on error.
368 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
369 unsigned int min_irqs, unsigned int wanted_irqs)
374 for (i = 0; i < wanted_irqs; i++)
375 irq_entries[i].entry = i;
377 got_irqs = pci_enable_msix_range(pdev, irq_entries,
378 min_irqs, wanted_irqs);
380 dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
381 min_irqs, wanted_irqs, got_irqs);
385 if (got_irqs < wanted_irqs)
386 dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
387 wanted_irqs, got_irqs);
393 * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
394 * @nn: NFP Network structure
395 * @irq_entries: Table of allocated interrupts
396 * @n: Size of @irq_entries (number of entries to grab)
398 * After interrupts are allocated with nfp_net_irqs_alloc() this function
399 * should be called to assign them to a specific netdev (port).
402 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
405 struct nfp_net_dp *dp = &nn->dp;
407 nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
408 dp->num_r_vecs = nn->max_r_vecs;
410 memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
412 if (dp->num_rx_rings > dp->num_r_vecs ||
413 dp->num_tx_rings > dp->num_r_vecs)
414 dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n",
415 dp->num_rx_rings, dp->num_tx_rings,
418 dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings);
419 dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings);
420 dp->num_stack_tx_rings = dp->num_tx_rings;
424 * nfp_net_irqs_disable() - Disable interrupts
425 * @pdev: PCI device structure
427 * Undoes what @nfp_net_irqs_alloc() does.
429 void nfp_net_irqs_disable(struct pci_dev *pdev)
431 pci_disable_msix(pdev);
435 * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
437 * @data: Opaque data structure
439 * Return: Indicate if the interrupt has been handled.
441 static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
443 struct nfp_net_r_vector *r_vec = data;
445 /* Currently we cannot tell if it's a rx or tx interrupt,
446 * since dim does not need accurate event_ctr to calculate,
447 * we just use this counter for both rx and tx dim.
451 napi_schedule_irqoff(&r_vec->napi);
453 /* The FW auto-masks any interrupt, either via the MASK bit in
454 * the MSI-X table or via the per entry ICR field. So there
455 * is no need to disable interrupts here.
460 static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data)
462 struct nfp_net_r_vector *r_vec = data;
464 tasklet_schedule(&r_vec->tasklet);
470 * nfp_net_read_link_status() - Reread link status from control BAR
471 * @nn: NFP Network structure
473 static void nfp_net_read_link_status(struct nfp_net *nn)
479 spin_lock_irqsave(&nn->link_status_lock, flags);
481 sts = nn_readw(nn, NFP_NET_CFG_STS);
482 link_up = !!(sts & NFP_NET_CFG_STS_LINK);
484 if (nn->link_up == link_up)
487 nn->link_up = link_up;
489 set_bit(NFP_PORT_CHANGED, &nn->port->flags);
490 if (nn->port->link_cb)
491 nn->port->link_cb(nn->port);
495 netif_carrier_on(nn->dp.netdev);
496 netdev_info(nn->dp.netdev, "NIC Link is Up\n");
498 netif_carrier_off(nn->dp.netdev);
499 netdev_info(nn->dp.netdev, "NIC Link is Down\n");
502 spin_unlock_irqrestore(&nn->link_status_lock, flags);
506 * nfp_net_irq_lsc() - Interrupt service routine for link state changes
508 * @data: Opaque data structure
510 * Return: Indicate if the interrupt has been handled.
512 static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
514 struct nfp_net *nn = data;
515 struct msix_entry *entry;
517 entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
519 nfp_net_read_link_status(nn);
521 nfp_net_irq_unmask(nn, entry->entry);
527 * nfp_net_irq_exn() - Interrupt service routine for exceptions
529 * @data: Opaque data structure
531 * Return: Indicate if the interrupt has been handled.
533 static irqreturn_t nfp_net_irq_exn(int irq, void *data)
535 struct nfp_net *nn = data;
537 nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
538 /* XXX TO BE IMPLEMENTED */
543 * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN)
544 * @nn: NFP Network structure
545 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
546 * @format: printf-style format to construct the interrupt name
547 * @name: Pointer to allocated space for interrupt name
548 * @name_sz: Size of space for interrupt name
549 * @vector_idx: Index of MSI-X vector used for this interrupt
550 * @handler: IRQ handler to register for this interrupt
553 nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset,
554 const char *format, char *name, size_t name_sz,
555 unsigned int vector_idx, irq_handler_t handler)
557 struct msix_entry *entry;
560 entry = &nn->irq_entries[vector_idx];
562 snprintf(name, name_sz, format, nfp_net_name(nn));
563 err = request_irq(entry->vector, handler, 0, name, nn);
565 nn_err(nn, "Failed to request IRQ %d (err=%d).\n",
569 nn_writeb(nn, ctrl_offset, entry->entry);
570 nfp_net_irq_unmask(nn, entry->entry);
576 * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN)
577 * @nn: NFP Network structure
578 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
579 * @vector_idx: Index of MSI-X vector used for this interrupt
581 static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset,
582 unsigned int vector_idx)
584 nn_writeb(nn, ctrl_offset, 0xff);
586 free_irq(nn->irq_entries[vector_idx].vector, nn);
590 nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
591 struct sk_buff *skb, u64 *tls_handle, int *nr_frags)
593 #ifdef CONFIG_TLS_DEVICE
594 struct nfp_net_tls_offload_ctx *ntls;
595 struct sk_buff *nskb;
599 if (likely(!dp->ktls_tx))
601 if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
604 datalen = skb->len - skb_tcp_all_headers(skb);
605 seq = ntohl(tcp_hdr(skb)->seq);
606 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
607 resync_pending = tls_offload_tx_resync_pending(skb->sk);
608 if (unlikely(resync_pending || ntls->next_seq != seq)) {
609 /* Pure ACK out of order already */
613 u64_stats_update_begin(&r_vec->tx_sync);
614 r_vec->tls_tx_fallback++;
615 u64_stats_update_end(&r_vec->tx_sync);
617 nskb = tls_encrypt_skb(skb);
619 u64_stats_update_begin(&r_vec->tx_sync);
620 r_vec->tls_tx_no_fallback++;
621 u64_stats_update_end(&r_vec->tx_sync);
624 /* encryption wasn't necessary */
627 /* we don't re-check ring space */
628 if (unlikely(skb_is_nonlinear(nskb))) {
629 nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n");
630 u64_stats_update_begin(&r_vec->tx_sync);
632 u64_stats_update_end(&r_vec->tx_sync);
633 dev_kfree_skb_any(nskb);
637 /* jump forward, a TX may have gotten lost, need to sync TX */
638 if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4)
639 tls_offload_tx_resync_request(nskb->sk, seq,
647 u64_stats_update_begin(&r_vec->tx_sync);
648 if (!skb_is_gso(skb))
651 r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs;
652 u64_stats_update_end(&r_vec->tx_sync);
655 memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle));
656 ntls->next_seq += datalen;
661 void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
663 #ifdef CONFIG_TLS_DEVICE
664 struct nfp_net_tls_offload_ctx *ntls;
669 if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
672 datalen = skb->len - skb_tcp_all_headers(skb);
673 seq = ntohl(tcp_hdr(skb)->seq);
675 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
676 if (ntls->next_seq == seq + datalen)
677 ntls->next_seq = seq;
683 static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
685 struct nfp_net *nn = netdev_priv(netdev);
687 nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue);
690 /* Receive processing */
692 nfp_net_calc_fl_bufsz_data(struct nfp_net_dp *dp)
694 unsigned int fl_bufsz = 0;
696 if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
697 fl_bufsz += NFP_NET_MAX_PREPEND;
699 fl_bufsz += dp->rx_offset;
700 fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu;
705 static unsigned int nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp)
707 unsigned int fl_bufsz;
709 fl_bufsz = NFP_NET_RX_BUF_HEADROOM;
710 fl_bufsz += dp->rx_dma_off;
711 fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
713 fl_bufsz = SKB_DATA_ALIGN(fl_bufsz);
714 fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
719 static unsigned int nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp *dp)
721 unsigned int fl_bufsz;
723 fl_bufsz = XDP_PACKET_HEADROOM;
724 fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
729 /* Setup and Configuration
733 * nfp_net_vecs_init() - Assign IRQs and setup rvecs.
734 * @nn: NFP Network structure
736 static void nfp_net_vecs_init(struct nfp_net *nn)
738 int numa_node = dev_to_node(&nn->pdev->dev);
739 struct nfp_net_r_vector *r_vec;
742 nn->lsc_handler = nfp_net_irq_lsc;
743 nn->exn_handler = nfp_net_irq_exn;
745 for (r = 0; r < nn->max_r_vecs; r++) {
746 struct msix_entry *entry;
748 entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
750 r_vec = &nn->r_vecs[r];
752 r_vec->irq_entry = entry->entry;
753 r_vec->irq_vector = entry->vector;
756 r_vec->handler = nfp_net_irq_rxtx;
758 r_vec->handler = nfp_ctrl_irq_rxtx;
760 __skb_queue_head_init(&r_vec->queue);
761 spin_lock_init(&r_vec->lock);
762 tasklet_setup(&r_vec->tasklet, nn->dp.ops->ctrl_poll);
763 tasklet_disable(&r_vec->tasklet);
766 cpumask_set_cpu(cpumask_local_spread(r, numa_node), &r_vec->affinity_mask);
771 nfp_net_napi_add(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, int idx)
774 netif_napi_add(dp->netdev, &r_vec->napi,
775 nfp_net_has_xsk_pool_slow(dp, idx) ? dp->ops->xsk_poll : dp->ops->poll);
777 tasklet_enable(&r_vec->tasklet);
781 nfp_net_napi_del(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec)
784 netif_napi_del(&r_vec->napi);
786 tasklet_disable(&r_vec->tasklet);
790 nfp_net_vector_assign_rings(struct nfp_net_dp *dp,
791 struct nfp_net_r_vector *r_vec, int idx)
793 r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL;
795 idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL;
797 r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ?
798 &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL;
800 if (nfp_net_has_xsk_pool_slow(dp, idx) || r_vec->xsk_pool) {
801 r_vec->xsk_pool = dp->xdp_prog ? dp->xsk_pools[idx] : NULL;
804 xsk_pool_set_rxq_info(r_vec->xsk_pool,
805 &r_vec->rx_ring->xdp_rxq);
807 nfp_net_napi_del(dp, r_vec);
808 nfp_net_napi_add(dp, r_vec, idx);
813 nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
818 nfp_net_napi_add(&nn->dp, r_vec, idx);
820 snprintf(r_vec->name, sizeof(r_vec->name),
821 "%s-rxtx-%d", nfp_net_name(nn), idx);
822 err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
825 nfp_net_napi_del(&nn->dp, r_vec);
826 nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
829 disable_irq(r_vec->irq_vector);
831 irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
833 nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
840 nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
842 irq_set_affinity_hint(r_vec->irq_vector, NULL);
843 nfp_net_napi_del(&nn->dp, r_vec);
844 free_irq(r_vec->irq_vector, r_vec);
848 * nfp_net_rss_write_itbl() - Write RSS indirection table to device
849 * @nn: NFP Net device to reconfigure
851 void nfp_net_rss_write_itbl(struct nfp_net *nn)
855 for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
856 nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
857 get_unaligned_le32(nn->rss_itbl + i));
861 * nfp_net_rss_write_key() - Write RSS hash key to device
862 * @nn: NFP Net device to reconfigure
864 void nfp_net_rss_write_key(struct nfp_net *nn)
868 for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4)
869 nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
870 get_unaligned_le32(nn->rss_key + i));
874 * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
875 * @nn: NFP Net device to reconfigure
877 void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
883 /* Compute factor used to convert coalesce '_usecs' parameters to
884 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
887 factor = nn->tlv_caps.me_freq_mhz / 16;
889 /* copy RX interrupt coalesce parameters */
890 value = (nn->rx_coalesce_max_frames << 16) |
891 (factor * nn->rx_coalesce_usecs);
892 for (i = 0; i < nn->dp.num_rx_rings; i++)
893 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
895 /* copy TX interrupt coalesce parameters */
896 value = (nn->tx_coalesce_max_frames << 16) |
897 (factor * nn->tx_coalesce_usecs);
898 for (i = 0; i < nn->dp.num_tx_rings; i++)
899 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
903 * nfp_net_write_mac_addr() - Write mac address to the device control BAR
904 * @nn: NFP Net device to reconfigure
905 * @addr: MAC address to write
907 * Writes the MAC address from the netdev to the device control BAR. Does not
908 * perform the required reconfig. We do a bit of byte swapping dance because
911 static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr)
913 nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
914 nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
918 * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
919 * @nn: NFP Net device to reconfigure
921 * Warning: must be fully idempotent.
923 static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
925 u32 new_ctrl, update;
929 new_ctrl = nn->dp.ctrl;
930 new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
931 update = NFP_NET_CFG_UPDATE_GEN;
932 update |= NFP_NET_CFG_UPDATE_MSIX;
933 update |= NFP_NET_CFG_UPDATE_RING;
935 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
936 new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
938 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
939 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
941 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
942 err = nfp_net_reconfig(nn, update);
944 nn_err(nn, "Could not disable device: %d\n", err);
946 for (r = 0; r < nn->dp.num_rx_rings; r++) {
947 nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
948 if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx))
949 nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]);
951 for (r = 0; r < nn->dp.num_tx_rings; r++)
952 nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
953 for (r = 0; r < nn->dp.num_r_vecs; r++)
954 nfp_net_vec_clear_ring_data(nn, r);
956 nn->dp.ctrl = new_ctrl;
960 * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
961 * @nn: NFP Net device to reconfigure
963 static int nfp_net_set_config_and_enable(struct nfp_net *nn)
965 u32 bufsz, new_ctrl, update = 0;
969 new_ctrl = nn->dp.ctrl;
971 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
972 nfp_net_rss_write_key(nn);
973 nfp_net_rss_write_itbl(nn);
974 nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
975 update |= NFP_NET_CFG_UPDATE_RSS;
978 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
979 nfp_net_coalesce_write_cfg(nn);
980 update |= NFP_NET_CFG_UPDATE_IRQMOD;
983 for (r = 0; r < nn->dp.num_tx_rings; r++)
984 nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
985 for (r = 0; r < nn->dp.num_rx_rings; r++)
986 nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
988 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE,
989 U64_MAX >> (64 - nn->dp.num_tx_rings));
991 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE,
992 U64_MAX >> (64 - nn->dp.num_rx_rings));
995 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
997 nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
999 bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
1000 nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz);
1003 new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1004 update |= NFP_NET_CFG_UPDATE_GEN;
1005 update |= NFP_NET_CFG_UPDATE_MSIX;
1006 update |= NFP_NET_CFG_UPDATE_RING;
1007 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
1008 new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
1010 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1011 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, nn->dp.ctrl_w1);
1012 err = nfp_net_reconfig(nn, update);
1014 nfp_net_clear_config_and_disable(nn);
1018 nn->dp.ctrl = new_ctrl;
1020 for (r = 0; r < nn->dp.num_rx_rings; r++)
1021 nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
1027 * nfp_net_close_stack() - Quiesce the stack (part of close)
1028 * @nn: NFP Net device to reconfigure
1030 static void nfp_net_close_stack(struct nfp_net *nn)
1032 struct nfp_net_r_vector *r_vec;
1035 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1036 netif_carrier_off(nn->dp.netdev);
1037 nn->link_up = false;
1039 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1040 r_vec = &nn->r_vecs[r];
1042 disable_irq(r_vec->irq_vector);
1043 napi_disable(&r_vec->napi);
1046 cancel_work_sync(&r_vec->rx_dim.work);
1049 cancel_work_sync(&r_vec->tx_dim.work);
1052 netif_tx_disable(nn->dp.netdev);
1056 * nfp_net_close_free_all() - Free all runtime resources
1057 * @nn: NFP Net device to reconfigure
1059 static void nfp_net_close_free_all(struct nfp_net *nn)
1063 nfp_net_tx_rings_free(&nn->dp);
1064 nfp_net_rx_rings_free(&nn->dp);
1066 for (r = 0; r < nn->dp.num_r_vecs; r++)
1067 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1069 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1070 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1074 * nfp_net_netdev_close() - Called when the device is downed
1075 * @netdev: netdev structure
1077 static int nfp_net_netdev_close(struct net_device *netdev)
1079 struct nfp_net *nn = netdev_priv(netdev);
1081 /* Step 1: Disable RX and TX rings from the Linux kernel perspective
1083 nfp_net_close_stack(nn);
1087 nfp_net_clear_config_and_disable(nn);
1088 nfp_port_configure(netdev, false);
1090 /* Step 3: Free resources
1092 nfp_net_close_free_all(nn);
1094 nn_dbg(nn, "%s down", netdev->name);
1098 void nfp_ctrl_close(struct nfp_net *nn)
1104 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1105 disable_irq(nn->r_vecs[r].irq_vector);
1106 tasklet_disable(&nn->r_vecs[r].tasklet);
1109 nfp_net_clear_config_and_disable(nn);
1111 nfp_net_close_free_all(nn);
1116 static void nfp_net_rx_dim_work(struct work_struct *work)
1118 struct nfp_net_r_vector *r_vec;
1119 unsigned int factor, value;
1120 struct dim_cq_moder moder;
1124 dim = container_of(work, struct dim, work);
1125 moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1126 r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim);
1127 nn = r_vec->nfp_net;
1129 /* Compute factor used to convert coalesce '_usecs' parameters to
1130 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1133 factor = nn->tlv_caps.me_freq_mhz / 16;
1134 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
1137 /* copy RX interrupt coalesce parameters */
1138 value = (moder.pkts << 16) | (factor * moder.usec);
1139 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
1140 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1142 dim->state = DIM_START_MEASURE;
1145 static void nfp_net_tx_dim_work(struct work_struct *work)
1147 struct nfp_net_r_vector *r_vec;
1148 unsigned int factor, value;
1149 struct dim_cq_moder moder;
1153 dim = container_of(work, struct dim, work);
1154 moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
1155 r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
1156 nn = r_vec->nfp_net;
1158 /* Compute factor used to convert coalesce '_usecs' parameters to
1159 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1162 factor = nn->tlv_caps.me_freq_mhz / 16;
1163 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
1166 /* copy TX interrupt coalesce parameters */
1167 value = (moder.pkts << 16) | (factor * moder.usec);
1168 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
1169 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1171 dim->state = DIM_START_MEASURE;
1175 * nfp_net_open_stack() - Start the device from stack's perspective
1176 * @nn: NFP Net device to reconfigure
1178 static void nfp_net_open_stack(struct nfp_net *nn)
1180 struct nfp_net_r_vector *r_vec;
1183 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1184 r_vec = &nn->r_vecs[r];
1186 if (r_vec->rx_ring) {
1187 INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
1188 r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1191 if (r_vec->tx_ring) {
1192 INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
1193 r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1196 napi_enable(&r_vec->napi);
1197 enable_irq(r_vec->irq_vector);
1200 netif_tx_wake_all_queues(nn->dp.netdev);
1202 enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1203 nfp_net_read_link_status(nn);
1206 static int nfp_net_open_alloc_all(struct nfp_net *nn)
1210 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
1211 nn->exn_name, sizeof(nn->exn_name),
1212 NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
1215 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
1216 nn->lsc_name, sizeof(nn->lsc_name),
1217 NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
1220 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1222 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1223 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1225 goto err_cleanup_vec_p;
1228 err = nfp_net_rx_rings_prepare(nn, &nn->dp);
1230 goto err_cleanup_vec;
1232 err = nfp_net_tx_rings_prepare(nn, &nn->dp);
1234 goto err_free_rx_rings;
1236 for (r = 0; r < nn->max_r_vecs; r++)
1237 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1242 nfp_net_rx_rings_free(&nn->dp);
1244 r = nn->dp.num_r_vecs;
1247 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1248 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1250 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1254 static int nfp_net_netdev_open(struct net_device *netdev)
1256 struct nfp_net *nn = netdev_priv(netdev);
1259 /* Step 1: Allocate resources for rings and the like
1260 * - Request interrupts
1261 * - Allocate RX and TX ring resources
1262 * - Setup initial RSS table
1264 err = nfp_net_open_alloc_all(nn);
1268 err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
1272 err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
1276 /* Step 2: Configure the NFP
1277 * - Ifup the physical interface if it exists
1278 * - Enable rings from 0 to tx_rings/rx_rings - 1.
1279 * - Write MAC address (in case it changed)
1281 * - Set the Freelist buffer size
1284 err = nfp_port_configure(netdev, true);
1288 err = nfp_net_set_config_and_enable(nn);
1290 goto err_port_disable;
1292 /* Step 3: Enable for kernel
1293 * - put some freelist descriptors on each RX ring
1294 * - enable NAPI on each ring
1295 * - enable all TX queues
1298 nfp_net_open_stack(nn);
1303 nfp_port_configure(netdev, false);
1305 nfp_net_close_free_all(nn);
1309 int nfp_ctrl_open(struct nfp_net *nn)
1313 /* ring dumping depends on vNICs being opened/closed under rtnl */
1316 err = nfp_net_open_alloc_all(nn);
1320 err = nfp_net_set_config_and_enable(nn);
1324 for (r = 0; r < nn->dp.num_r_vecs; r++)
1325 enable_irq(nn->r_vecs[r].irq_vector);
1332 nfp_net_close_free_all(nn);
1338 int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len,
1339 int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *))
1341 struct nfp_mbox_amsg_entry *entry;
1343 entry = kmalloc(sizeof(*entry) + len, GFP_ATOMIC);
1347 memcpy(entry->msg, data, len);
1351 spin_lock_bh(&nn->mbox_amsg.lock);
1352 list_add_tail(&entry->list, &nn->mbox_amsg.list);
1353 spin_unlock_bh(&nn->mbox_amsg.lock);
1355 schedule_work(&nn->mbox_amsg.work);
1360 static void nfp_net_mbox_amsg_work(struct work_struct *work)
1362 struct nfp_net *nn = container_of(work, struct nfp_net, mbox_amsg.work);
1363 struct nfp_mbox_amsg_entry *entry, *tmp;
1364 struct list_head tmp_list;
1366 INIT_LIST_HEAD(&tmp_list);
1368 spin_lock_bh(&nn->mbox_amsg.lock);
1369 list_splice_init(&nn->mbox_amsg.list, &tmp_list);
1370 spin_unlock_bh(&nn->mbox_amsg.lock);
1372 list_for_each_entry_safe(entry, tmp, &tmp_list, list) {
1373 int err = entry->cfg(nn, entry);
1376 nn_err(nn, "Config cmd %d to HW failed %d.\n", entry->cmd, err);
1378 list_del(&entry->list);
1383 static int nfp_net_mc_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry)
1385 unsigned char *addr = entry->msg;
1388 ret = nfp_net_mbox_lock(nn, NFP_NET_CFG_MULTICAST_SZ);
1392 nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_HI,
1393 get_unaligned_be32(addr));
1394 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_LO,
1395 get_unaligned_be16(addr + 4));
1397 return nfp_net_mbox_reconfig_and_unlock(nn, entry->cmd);
1400 static int nfp_net_mc_sync(struct net_device *netdev, const unsigned char *addr)
1402 struct nfp_net *nn = netdev_priv(netdev);
1404 if (netdev_mc_count(netdev) > NFP_NET_CFG_MAC_MC_MAX) {
1405 nn_err(nn, "Requested number of MC addresses (%d) exceeds maximum (%d).\n",
1406 netdev_mc_count(netdev), NFP_NET_CFG_MAC_MC_MAX);
1410 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_ADD, addr,
1411 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1414 static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr)
1416 struct nfp_net *nn = netdev_priv(netdev);
1418 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_DEL, addr,
1419 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1422 static void nfp_net_set_rx_mode(struct net_device *netdev)
1424 struct nfp_net *nn = netdev_priv(netdev);
1425 u32 new_ctrl, new_ctrl_w1;
1427 new_ctrl = nn->dp.ctrl;
1428 new_ctrl_w1 = nn->dp.ctrl_w1;
1430 if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
1431 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
1433 new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
1435 if (netdev->flags & IFF_ALLMULTI)
1436 new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_MCAST_FILTER;
1438 new_ctrl_w1 |= nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER;
1440 if (netdev->flags & IFF_PROMISC) {
1441 if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
1442 new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
1444 nn_warn(nn, "FW does not support promiscuous mode\n");
1446 new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
1449 if ((nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) &&
1450 __dev_mc_sync(netdev, nfp_net_mc_sync, nfp_net_mc_unsync))
1451 netdev_err(netdev, "Sync mc address failed\n");
1453 if (new_ctrl == nn->dp.ctrl && new_ctrl_w1 == nn->dp.ctrl_w1)
1456 if (new_ctrl != nn->dp.ctrl)
1457 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1458 if (new_ctrl_w1 != nn->dp.ctrl_w1)
1459 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1460 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
1462 nn->dp.ctrl = new_ctrl;
1463 nn->dp.ctrl_w1 = new_ctrl_w1;
1466 static void nfp_net_rss_init_itbl(struct nfp_net *nn)
1470 for (i = 0; i < sizeof(nn->rss_itbl); i++)
1472 ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
1475 static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
1477 struct nfp_net_dp new_dp = *dp;
1482 nn->dp.netdev->mtu = new_dp.mtu;
1484 if (!netif_is_rxfh_configured(nn->dp.netdev))
1485 nfp_net_rss_init_itbl(nn);
1488 static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
1493 nfp_net_dp_swap(nn, dp);
1495 for (r = 0; r < nn->max_r_vecs; r++)
1496 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1498 err = netif_set_real_num_queues(nn->dp.netdev,
1499 nn->dp.num_stack_tx_rings,
1500 nn->dp.num_rx_rings);
1504 return nfp_net_set_config_and_enable(nn);
1507 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
1509 struct nfp_net_dp *new;
1511 new = kmalloc(sizeof(*new), GFP_KERNEL);
1517 new->xsk_pools = kmemdup(new->xsk_pools,
1518 array_size(nn->max_r_vecs,
1519 sizeof(new->xsk_pools)),
1521 if (!new->xsk_pools) {
1526 /* Clear things which need to be recomputed */
1528 new->tx_rings = NULL;
1529 new->rx_rings = NULL;
1530 new->num_r_vecs = 0;
1531 new->num_stack_tx_rings = 0;
1538 static void nfp_net_free_dp(struct nfp_net_dp *dp)
1540 kfree(dp->xsk_pools);
1545 nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
1546 struct netlink_ext_ack *extack)
1548 unsigned int r, xsk_min_fl_bufsz;
1550 /* XDP-enabled tests */
1553 if (dp->fl_bufsz > PAGE_SIZE) {
1554 NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
1557 if (dp->num_tx_rings > nn->max_tx_rings) {
1558 NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
1562 xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp);
1563 for (r = 0; r < nn->max_r_vecs; r++) {
1564 if (!dp->xsk_pools[r])
1567 if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) {
1568 NL_SET_ERR_MSG_MOD(extack,
1569 "XSK buffer pool chunk size too small");
1577 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
1578 struct netlink_ext_ack *extack)
1582 dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
1584 dp->num_stack_tx_rings = dp->num_tx_rings;
1586 dp->num_stack_tx_rings -= dp->num_rx_rings;
1588 dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
1590 err = nfp_net_check_config(nn, dp, extack);
1594 if (!netif_running(dp->netdev)) {
1595 nfp_net_dp_swap(nn, dp);
1600 /* Prepare new rings */
1601 for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
1602 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1605 goto err_cleanup_vecs;
1609 err = nfp_net_rx_rings_prepare(nn, dp);
1611 goto err_cleanup_vecs;
1613 err = nfp_net_tx_rings_prepare(nn, dp);
1617 /* Stop device, swap in new rings, try to start the firmware */
1618 nfp_net_close_stack(nn);
1619 nfp_net_clear_config_and_disable(nn);
1621 err = nfp_net_dp_swap_enable(nn, dp);
1625 nfp_net_clear_config_and_disable(nn);
1627 /* Try with old configuration and old rings */
1628 err2 = nfp_net_dp_swap_enable(nn, dp);
1630 nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
1633 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1634 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1636 nfp_net_rx_rings_free(dp);
1637 nfp_net_tx_rings_free(dp);
1639 nfp_net_open_stack(nn);
1641 nfp_net_free_dp(dp);
1646 nfp_net_rx_rings_free(dp);
1648 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1649 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1650 nfp_net_free_dp(dp);
1654 static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
1656 struct nfp_net *nn = netdev_priv(netdev);
1657 struct nfp_net_dp *dp;
1660 err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
1664 dp = nfp_net_clone_dp(nn);
1670 return nfp_net_ring_reconfig(nn, dp, NULL);
1674 nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1676 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
1677 struct nfp_net *nn = netdev_priv(netdev);
1680 /* Priority tagged packets with vlan id 0 are processed by the
1681 * NFP as untagged packets
1686 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1690 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1691 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1694 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1698 nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1700 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
1701 struct nfp_net *nn = netdev_priv(netdev);
1704 /* Priority tagged packets with vlan id 0 are processed by the
1705 * NFP as untagged packets
1710 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1714 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1715 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1718 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1721 static void nfp_net_stat64(struct net_device *netdev,
1722 struct rtnl_link_stats64 *stats)
1724 struct nfp_net *nn = netdev_priv(netdev);
1727 /* Collect software stats */
1728 for (r = 0; r < nn->max_r_vecs; r++) {
1729 struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
1734 start = u64_stats_fetch_begin(&r_vec->rx_sync);
1735 data[0] = r_vec->rx_pkts;
1736 data[1] = r_vec->rx_bytes;
1737 data[2] = r_vec->rx_drops;
1738 } while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
1739 stats->rx_packets += data[0];
1740 stats->rx_bytes += data[1];
1741 stats->rx_dropped += data[2];
1744 start = u64_stats_fetch_begin(&r_vec->tx_sync);
1745 data[0] = r_vec->tx_pkts;
1746 data[1] = r_vec->tx_bytes;
1747 data[2] = r_vec->tx_errors;
1748 } while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
1749 stats->tx_packets += data[0];
1750 stats->tx_bytes += data[1];
1751 stats->tx_errors += data[2];
1754 /* Add in device stats */
1755 stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
1756 stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
1757 stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
1759 stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
1760 stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
1763 static int nfp_net_set_features(struct net_device *netdev,
1764 netdev_features_t features)
1766 netdev_features_t changed = netdev->features ^ features;
1767 struct nfp_net *nn = netdev_priv(netdev);
1771 /* Assume this is not called with features we have not advertised */
1773 new_ctrl = nn->dp.ctrl;
1775 if (changed & NETIF_F_RXCSUM) {
1776 if (features & NETIF_F_RXCSUM)
1777 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
1779 new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
1782 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
1783 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
1784 new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
1786 new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
1789 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1790 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1791 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
1792 NFP_NET_CFG_CTRL_LSO;
1794 new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
1797 if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
1798 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1799 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
1800 NFP_NET_CFG_CTRL_RXVLAN;
1802 new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY;
1805 if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
1806 if (features & NETIF_F_HW_VLAN_CTAG_TX)
1807 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
1808 NFP_NET_CFG_CTRL_TXVLAN;
1810 new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY;
1813 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
1814 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1815 new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
1817 new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
1820 if (changed & NETIF_F_HW_VLAN_STAG_RX) {
1821 if (features & NETIF_F_HW_VLAN_STAG_RX)
1822 new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
1824 new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
1827 if (changed & NETIF_F_SG) {
1828 if (features & NETIF_F_SG)
1829 new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
1831 new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
1834 err = nfp_port_set_features(netdev, features);
1838 nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
1839 netdev->features, features, changed);
1841 if (new_ctrl == nn->dp.ctrl)
1844 nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
1845 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1846 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
1850 nn->dp.ctrl = new_ctrl;
1855 static netdev_features_t
1856 nfp_net_fix_features(struct net_device *netdev,
1857 netdev_features_t features)
1859 if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
1860 (features & NETIF_F_HW_VLAN_STAG_RX)) {
1861 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
1862 features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1863 netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1865 "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n");
1866 } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) {
1867 features &= ~NETIF_F_HW_VLAN_STAG_RX;
1868 netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX;
1870 "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n");
1876 static netdev_features_t
1877 nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
1878 netdev_features_t features)
1882 /* We can't do TSO over double tagged packets (802.1AD) */
1883 features &= vlan_features_check(skb, features);
1885 if (!skb->encapsulation)
1888 /* Ensure that inner L4 header offset fits into TX descriptor field */
1889 if (skb_is_gso(skb)) {
1892 hdrlen = skb_inner_tcp_all_headers(skb);
1894 /* Assume worst case scenario of having longest possible
1895 * metadata prepend - 8B
1897 if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
1898 features &= ~NETIF_F_GSO_MASK;
1901 if (xfrm_offload(skb))
1904 /* VXLAN/GRE check */
1905 switch (vlan_get_protocol(skb)) {
1906 case htons(ETH_P_IP):
1907 l4_hdr = ip_hdr(skb)->protocol;
1909 case htons(ETH_P_IPV6):
1910 l4_hdr = ipv6_hdr(skb)->nexthdr;
1913 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1916 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
1917 skb->inner_protocol != htons(ETH_P_TEB) ||
1918 (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
1919 (l4_hdr == IPPROTO_UDP &&
1920 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
1921 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
1922 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1928 nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
1930 struct nfp_net *nn = netdev_priv(netdev);
1933 /* If port is defined, devlink_port is registered and devlink core
1934 * is taking care of name formatting.
1939 if (nn->dp.is_vf || nn->vnic_no_name)
1942 n = snprintf(name, len, "n%d", nn->id);
1949 static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
1951 struct bpf_prog *prog = bpf->prog;
1952 struct nfp_net_dp *dp;
1955 if (!prog == !nn->dp.xdp_prog) {
1956 WRITE_ONCE(nn->dp.xdp_prog, prog);
1957 xdp_attachment_setup(&nn->xdp, bpf);
1961 dp = nfp_net_clone_dp(nn);
1965 dp->xdp_prog = prog;
1966 dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
1967 dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
1968 dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
1970 /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
1971 err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
1975 xdp_attachment_setup(&nn->xdp, bpf);
1979 static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
1983 err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
1987 xdp_attachment_setup(&nn->xdp_hw, bpf);
1991 static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
1993 struct nfp_net *nn = netdev_priv(netdev);
1995 switch (xdp->command) {
1996 case XDP_SETUP_PROG:
1997 return nfp_net_xdp_setup_drv(nn, xdp);
1998 case XDP_SETUP_PROG_HW:
1999 return nfp_net_xdp_setup_hw(nn, xdp);
2000 case XDP_SETUP_XSK_POOL:
2001 return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool,
2004 return nfp_app_bpf(nn->app, nn, xdp);
2008 static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
2010 struct nfp_net *nn = netdev_priv(netdev);
2011 struct sockaddr *saddr = addr;
2014 err = eth_prepare_mac_addr_change(netdev, addr);
2018 nfp_net_write_mac_addr(nn, saddr->sa_data);
2020 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
2024 eth_commit_mac_addr_change(netdev, addr);
2029 static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2030 struct net_device *dev, u32 filter_mask,
2033 struct nfp_net *nn = netdev_priv(dev);
2036 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2039 mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ?
2040 BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB;
2042 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
2043 nlflags, filter_mask, NULL);
2046 static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
2047 u16 flags, struct netlink_ext_ack *extack)
2049 struct nfp_net *nn = netdev_priv(dev);
2050 struct nlattr *attr, *br_spec;
2055 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2058 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2062 nla_for_each_nested(attr, br_spec, rem) {
2063 if (nla_type(attr) != IFLA_BRIDGE_MODE)
2066 if (nla_len(attr) < sizeof(mode))
2069 new_ctrl = nn->dp.ctrl;
2070 mode = nla_get_u16(attr);
2071 if (mode == BRIDGE_MODE_VEPA)
2072 new_ctrl |= NFP_NET_CFG_CTRL_VEPA;
2073 else if (mode == BRIDGE_MODE_VEB)
2074 new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA;
2078 if (new_ctrl == nn->dp.ctrl)
2081 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2082 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2084 nn->dp.ctrl = new_ctrl;
2092 const struct net_device_ops nfp_nfd3_netdev_ops = {
2093 .ndo_init = nfp_app_ndo_init,
2094 .ndo_uninit = nfp_app_ndo_uninit,
2095 .ndo_open = nfp_net_netdev_open,
2096 .ndo_stop = nfp_net_netdev_close,
2097 .ndo_start_xmit = nfp_net_tx,
2098 .ndo_get_stats64 = nfp_net_stat64,
2099 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2100 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2101 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2102 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2103 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2104 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2105 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2106 .ndo_get_vf_config = nfp_app_get_vf_config,
2107 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2108 .ndo_setup_tc = nfp_port_setup_tc,
2109 .ndo_tx_timeout = nfp_net_tx_timeout,
2110 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2111 .ndo_change_mtu = nfp_net_change_mtu,
2112 .ndo_set_mac_address = nfp_net_set_mac_address,
2113 .ndo_set_features = nfp_net_set_features,
2114 .ndo_fix_features = nfp_net_fix_features,
2115 .ndo_features_check = nfp_net_features_check,
2116 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2117 .ndo_bpf = nfp_net_xdp,
2118 .ndo_xsk_wakeup = nfp_net_xsk_wakeup,
2119 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2120 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2123 const struct net_device_ops nfp_nfdk_netdev_ops = {
2124 .ndo_init = nfp_app_ndo_init,
2125 .ndo_uninit = nfp_app_ndo_uninit,
2126 .ndo_open = nfp_net_netdev_open,
2127 .ndo_stop = nfp_net_netdev_close,
2128 .ndo_start_xmit = nfp_net_tx,
2129 .ndo_get_stats64 = nfp_net_stat64,
2130 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2131 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2132 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2133 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2134 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2135 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2136 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2137 .ndo_get_vf_config = nfp_app_get_vf_config,
2138 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2139 .ndo_setup_tc = nfp_port_setup_tc,
2140 .ndo_tx_timeout = nfp_net_tx_timeout,
2141 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2142 .ndo_change_mtu = nfp_net_change_mtu,
2143 .ndo_set_mac_address = nfp_net_set_mac_address,
2144 .ndo_set_features = nfp_net_set_features,
2145 .ndo_fix_features = nfp_net_fix_features,
2146 .ndo_features_check = nfp_net_features_check,
2147 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2148 .ndo_bpf = nfp_net_xdp,
2149 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2150 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2153 static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
2155 struct nfp_net *nn = netdev_priv(netdev);
2158 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
2159 for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
2160 struct udp_tunnel_info ti0, ti1;
2162 udp_tunnel_nic_get_port(netdev, table, i, &ti0);
2163 udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
2165 nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
2166 be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
2169 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
2172 static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
2173 .sync_table = nfp_udp_tunnel_sync,
2174 .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP |
2175 UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
2178 .n_entries = NFP_NET_N_VXLAN_PORTS,
2179 .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
2185 * nfp_net_info() - Print general info about the NIC
2186 * @nn: NFP Net device to reconfigure
2188 void nfp_net_info(struct nfp_net *nn)
2190 nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
2191 nn->dp.is_vf ? "VF " : "",
2192 nn->dp.num_tx_rings, nn->max_tx_rings,
2193 nn->dp.num_rx_rings, nn->max_rx_rings);
2194 nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
2195 nn->fw_ver.extend, nn->fw_ver.class,
2196 nn->fw_ver.major, nn->fw_ver.minor,
2198 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\n",
2200 nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
2201 nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
2202 nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
2203 nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
2204 nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
2205 nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
2206 nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
2207 nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "",
2208 nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "",
2209 nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "",
2210 nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
2211 nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
2212 nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "",
2213 nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
2214 nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
2215 nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
2216 nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
2217 nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
2218 nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
2219 nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "",
2220 nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "",
2221 nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
2222 nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "",
2223 nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
2224 "RXCSUM_COMPLETE " : "",
2225 nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
2226 nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER ? "MULTICAST_FILTER " : "",
2227 nfp_app_extra_cap(nn->app, nn));
2231 * nfp_net_alloc() - Allocate netdev and related structure
2233 * @dev_info: NFP ASIC params
2234 * @ctrl_bar: PCI IOMEM with vNIC config memory
2235 * @needs_netdev: Whether to allocate a netdev for this vNIC
2236 * @max_tx_rings: Maximum number of TX rings supported by device
2237 * @max_rx_rings: Maximum number of RX rings supported by device
2239 * This function allocates a netdev device and fills in the initial
2240 * part of the @struct nfp_net structure. In case of control device
2241 * nfp_net structure is allocated without the netdev.
2243 * Return: NFP Net device structure, or ERR_PTR on error.
2246 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
2247 void __iomem *ctrl_bar, bool needs_netdev,
2248 unsigned int max_tx_rings, unsigned int max_rx_rings)
2250 u64 dma_mask = dma_get_mask(&pdev->dev);
2255 struct net_device *netdev;
2257 netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
2258 max_tx_rings, max_rx_rings);
2260 return ERR_PTR(-ENOMEM);
2262 SET_NETDEV_DEV(netdev, &pdev->dev);
2263 nn = netdev_priv(netdev);
2264 nn->dp.netdev = netdev;
2266 nn = vzalloc(sizeof(*nn));
2268 return ERR_PTR(-ENOMEM);
2271 nn->dp.dev = &pdev->dev;
2272 nn->dp.ctrl_bar = ctrl_bar;
2273 nn->dev_info = dev_info;
2275 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
2277 switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) {
2278 case NFP_NET_CFG_VERSION_DP_NFD3:
2279 nn->dp.ops = &nfp_nfd3_ops;
2281 case NFP_NET_CFG_VERSION_DP_NFDK:
2282 if (nn->fw_ver.major < 5) {
2284 "NFDK must use ABI 5 or newer, found: %d\n",
2289 nn->dp.ops = &nfp_nfdk_ops;
2296 if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) {
2298 "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n",
2299 nn->dp.ops->dma_mask, dma_mask);
2304 nn->max_tx_rings = max_tx_rings;
2305 nn->max_rx_rings = max_rx_rings;
2307 nn->dp.num_tx_rings = min_t(unsigned int,
2308 max_tx_rings, num_online_cpus());
2309 nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
2310 netif_get_num_default_rss_queues());
2312 nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
2313 nn->dp.num_r_vecs = min_t(unsigned int,
2314 nn->dp.num_r_vecs, num_online_cpus());
2315 nn->max_r_vecs = nn->dp.num_r_vecs;
2317 nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools),
2319 if (!nn->dp.xsk_pools) {
2324 nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
2325 nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
2327 sema_init(&nn->bar_lock, 1);
2329 spin_lock_init(&nn->reconfig_lock);
2330 spin_lock_init(&nn->link_status_lock);
2332 timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
2334 err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
2339 err = nfp_ccm_mbox_alloc(nn);
2347 free_netdev(nn->dp.netdev);
2350 return ERR_PTR(err);
2354 * nfp_net_free() - Undo what @nfp_net_alloc() did
2355 * @nn: NFP Net device to reconfigure
2357 void nfp_net_free(struct nfp_net *nn)
2359 WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted);
2360 nfp_ccm_mbox_free(nn);
2362 kfree(nn->dp.xsk_pools);
2364 free_netdev(nn->dp.netdev);
2370 * nfp_net_rss_key_sz() - Get current size of the RSS key
2371 * @nn: NFP Net device instance
2373 * Return: size of the RSS key for currently selected hash function.
2375 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
2377 switch (nn->rss_hfunc) {
2378 case ETH_RSS_HASH_TOP:
2379 return NFP_NET_CFG_RSS_KEY_SZ;
2380 case ETH_RSS_HASH_XOR:
2382 case ETH_RSS_HASH_CRC32:
2386 nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
2391 * nfp_net_rss_init() - Set the initial RSS parameters
2392 * @nn: NFP Net device to reconfigure
2394 static void nfp_net_rss_init(struct nfp_net *nn)
2396 unsigned long func_bit, rss_cap_hfunc;
2399 /* Read the RSS function capability and select first supported func */
2400 reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
2401 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
2403 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
2404 NFP_NET_CFG_RSS_TOEPLITZ);
2406 func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
2407 if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
2408 dev_warn(nn->dp.dev,
2409 "Bad RSS config, defaulting to Toeplitz hash\n");
2410 func_bit = ETH_RSS_HASH_TOP_BIT;
2412 nn->rss_hfunc = 1 << func_bit;
2414 netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
2416 nfp_net_rss_init_itbl(nn);
2418 /* Enable IPv4/IPv6 TCP by default */
2419 nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
2420 NFP_NET_CFG_RSS_IPV6_TCP |
2421 NFP_NET_CFG_RSS_IPV4_UDP |
2422 NFP_NET_CFG_RSS_IPV6_UDP |
2423 FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
2424 NFP_NET_CFG_RSS_MASK;
2428 * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
2429 * @nn: NFP Net device to reconfigure
2431 static void nfp_net_irqmod_init(struct nfp_net *nn)
2433 nn->rx_coalesce_usecs = 50;
2434 nn->rx_coalesce_max_frames = 64;
2435 nn->tx_coalesce_usecs = 50;
2436 nn->tx_coalesce_max_frames = 64;
2438 nn->rx_coalesce_adapt_on = true;
2439 nn->tx_coalesce_adapt_on = true;
2442 static void nfp_net_netdev_init(struct nfp_net *nn)
2444 struct net_device *netdev = nn->dp.netdev;
2446 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
2448 netdev->mtu = nn->dp.mtu;
2450 /* Advertise/enable offloads based on capabilities
2452 * Note: netdev->features show the currently enabled features
2453 * and netdev->hw_features advertises which features are
2454 * supported. By default we enable most features.
2456 if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
2457 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2459 netdev->hw_features = NETIF_F_HIGHDMA;
2460 if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
2461 netdev->hw_features |= NETIF_F_RXCSUM;
2462 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2464 if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
2465 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2466 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2468 if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
2469 netdev->hw_features |= NETIF_F_SG;
2470 nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
2472 if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
2473 nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2474 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2475 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2476 NFP_NET_CFG_CTRL_LSO;
2478 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
2479 netdev->hw_features |= NETIF_F_RXHASH;
2481 #ifdef CONFIG_NFP_NET_IPSEC
2482 if (nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC)
2483 netdev->hw_features |= NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM;
2486 if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
2487 if (nn->cap & NFP_NET_CFG_CTRL_LSO) {
2488 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
2489 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2490 NETIF_F_GSO_PARTIAL;
2491 netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
2493 netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
2494 nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
2496 if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
2497 if (nn->cap & NFP_NET_CFG_CTRL_LSO)
2498 netdev->hw_features |= NETIF_F_GSO_GRE;
2499 nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE;
2501 if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
2502 netdev->hw_enc_features = netdev->hw_features;
2504 netdev->vlan_features = netdev->hw_features;
2506 if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) {
2507 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
2508 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2509 NFP_NET_CFG_CTRL_RXVLAN;
2511 if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) {
2512 if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2513 nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
2515 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
2516 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2517 NFP_NET_CFG_CTRL_TXVLAN;
2520 if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
2521 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2522 nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2524 if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) {
2525 netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
2526 nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2529 netdev->features = netdev->hw_features;
2531 if (nfp_app_has_tc(nn->app) && nn->port)
2532 netdev->hw_features |= NETIF_F_HW_TC;
2534 /* C-Tag strip and S-Tag strip can't be supported simultaneously,
2535 * so enable C-Tag strip and disable S-Tag strip by default.
2537 netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX;
2538 nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2540 netdev->xdp_features = NETDEV_XDP_ACT_BASIC;
2541 if (nn->app && nn->app->type->id == NFP_APP_BPF_NIC)
2542 netdev->xdp_features |= NETDEV_XDP_ACT_HW_OFFLOAD;
2544 /* Finalise the netdev setup */
2545 switch (nn->dp.ops->version) {
2546 case NFP_NFD_VER_NFD3:
2547 netdev->netdev_ops = &nfp_nfd3_netdev_ops;
2548 netdev->xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY;
2550 case NFP_NFD_VER_NFDK:
2551 netdev->netdev_ops = &nfp_nfdk_netdev_ops;
2555 netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
2557 /* MTU range: 68 - hw-specific max */
2558 netdev->min_mtu = ETH_MIN_MTU;
2559 netdev->max_mtu = nn->max_mtu;
2561 netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
2563 netif_carrier_off(netdev);
2565 nfp_net_set_ethtool_ops(netdev);
2568 static int nfp_net_read_caps(struct nfp_net *nn)
2570 /* Get some of the read-only fields from the BAR */
2571 nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
2572 nn->cap_w1 = nn_readl(nn, NFP_NET_CFG_CAP_WORD1);
2573 nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
2575 /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
2576 * we allow use of non-chained metadata if RSS(v1) is the only
2577 * advertised capability requiring metadata.
2579 nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
2581 !(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
2582 nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
2583 /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where
2584 * it has the same meaning as RSSv2.
2586 if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
2587 nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
2589 /* Determine RX packet/metadata boundary offset */
2590 if (nn->fw_ver.major >= 2) {
2593 reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
2594 if (reg > NFP_NET_MAX_PREPEND) {
2595 nn_err(nn, "Invalid rx offset: %d\n", reg);
2598 nn->dp.rx_offset = reg;
2600 nn->dp.rx_offset = NFP_NET_RX_OFFSET;
2603 /* Mask out NFD-version-specific features */
2604 nn->cap &= nn->dp.ops->cap_mask;
2606 /* For control vNICs mask out the capabilities app doesn't want. */
2608 nn->cap &= nn->app->type->ctrl_cap_mask;
2614 * nfp_net_init() - Initialise/finalise the nfp_net structure
2615 * @nn: NFP Net device structure
2617 * Return: 0 on success or negative errno on error.
2619 int nfp_net_init(struct nfp_net *nn)
2623 nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
2625 err = nfp_net_read_caps(nn);
2629 /* Set default MTU and Freelist buffer size */
2630 if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) {
2631 nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu);
2632 } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) {
2633 nn->dp.mtu = nn->max_mtu;
2635 nn->dp.mtu = NFP_NET_DEFAULT_MTU;
2637 nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
2639 if (nfp_app_ctrl_uses_data_vnics(nn->app))
2640 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA;
2642 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
2643 nfp_net_rss_init(nn);
2644 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
2645 NFP_NET_CFG_CTRL_RSS;
2648 /* Allow L2 Broadcast and Multicast through by default, if supported */
2649 if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
2650 nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
2652 /* Allow IRQ moderation, if supported */
2653 if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
2654 nfp_net_irqmod_init(nn);
2655 nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
2658 /* Enable TX pointer writeback, if supported */
2659 if (nn->cap & NFP_NET_CFG_CTRL_TXRWB)
2660 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB;
2662 if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER)
2663 nn->dp.ctrl_w1 |= NFP_NET_CFG_CTRL_MCAST_FILTER;
2665 /* Stash the re-configuration queue away. First odd queue in TX Bar */
2666 nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
2668 /* Make sure the FW knows the netdev is supposed to be disabled here */
2669 nn_writel(nn, NFP_NET_CFG_CTRL, 0);
2670 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
2671 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
2672 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, 0);
2673 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
2674 NFP_NET_CFG_UPDATE_GEN);
2678 if (nn->dp.netdev) {
2679 nfp_net_netdev_init(nn);
2681 err = nfp_ccm_mbox_init(nn);
2685 err = nfp_net_tls_init(nn);
2687 goto err_clean_mbox;
2689 nfp_net_ipsec_init(nn);
2692 nfp_net_vecs_init(nn);
2697 spin_lock_init(&nn->mbox_amsg.lock);
2698 INIT_LIST_HEAD(&nn->mbox_amsg.list);
2699 INIT_WORK(&nn->mbox_amsg.work, nfp_net_mbox_amsg_work);
2701 return register_netdev(nn->dp.netdev);
2704 nfp_ccm_mbox_clean(nn);
2709 * nfp_net_clean() - Undo what nfp_net_init() did.
2710 * @nn: NFP Net device structure
2712 void nfp_net_clean(struct nfp_net *nn)
2717 unregister_netdev(nn->dp.netdev);
2718 nfp_net_ipsec_clean(nn);
2719 nfp_ccm_mbox_clean(nn);
2720 flush_work(&nn->mbox_amsg.work);
2721 nfp_net_reconfig_wait_posted(nn);