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
56 static 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 */
nfp_net_get_fw_version(struct nfp_net_fw_version * fw_ver,void __iomem * ctrl_bar)63 void 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
nfp_qcp_queue_offset(const struct nfp_dev_info * dev_info,u16 queue)72 u32 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 */
nfp_net_reconfig_start(struct nfp_net * nn,u32 update)84 static 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. */
nfp_net_reconfig_start_async(struct nfp_net * nn,u32 update)94 static 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
nfp_net_reconfig_check_done(struct nfp_net * nn,bool last_check)105 static 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
__nfp_net_reconfig_wait(struct nfp_net * nn,unsigned long deadline)127 static 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
nfp_net_reconfig_wait(struct nfp_net * nn,unsigned long deadline)149 static 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
nfp_net_reconfig_timer(struct timer_list * t)160 static void nfp_net_reconfig_timer(struct timer_list *t)
161 {
162 struct nfp_net *nn = from_timer(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);
177 done:
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 */
nfp_net_reconfig_post(struct nfp_net * nn,u32 update)190 static 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;
206 done:
207 spin_unlock_bh(&nn->reconfig_lock);
208 }
209
nfp_net_reconfig_sync_enter(struct nfp_net * nn)210 static 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 del_timer_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
nfp_net_reconfig_wait_posted(struct nfp_net * nn)241 static 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 */
__nfp_net_reconfig(struct nfp_net * nn,u32 update)261 int __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
nfp_net_reconfig(struct nfp_net * nn,u32 update)282 int 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
nfp_net_mbox_lock(struct nfp_net * nn,unsigned int data_size)293 int 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 */
nfp_net_mbox_reconfig(struct nfp_net * nn,u32 mbox_cmd)314 int 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
nfp_net_mbox_reconfig_post(struct nfp_net * nn,u32 mbox_cmd)330 void 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
nfp_net_mbox_reconfig_wait_posted(struct nfp_net * nn)339 int 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
nfp_net_mbox_reconfig_and_unlock(struct nfp_net * nn,u32 mbox_cmd)348 int 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 */
369 unsigned int
nfp_net_irqs_alloc(struct pci_dev * pdev,struct msix_entry * irq_entries,unsigned int min_irqs,unsigned int wanted_irqs)370 nfp_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 */
403 void
nfp_net_irqs_assign(struct nfp_net * nn,struct msix_entry * irq_entries,unsigned int n)404 nfp_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 */
nfp_net_irqs_disable(struct pci_dev * pdev)431 void 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 */
nfp_net_irq_rxtx(int irq,void * data)443 static 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
nfp_ctrl_irq_rxtx(int irq,void * data)462 static 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 */
nfp_net_read_link_status(struct nfp_net * nn)475 static 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 }
503 out:
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 */
nfp_net_irq_lsc(int irq,void * data)514 static 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 */
nfp_net_irq_exn(int irq,void * data)535 static 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 */
554 static int
nfp_net_aux_irq_request(struct nfp_net * nn,u32 ctrl_offset,const char * format,char * name,size_t name_sz,unsigned int vector_idx,irq_handler_t handler)555 nfp_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 */
nfp_net_aux_irq_free(struct nfp_net * nn,u32 ctrl_offset,unsigned int vector_idx)583 static 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
591 struct sk_buff *
nfp_net_tls_tx(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec,struct sk_buff * skb,u64 * tls_handle,int * nr_frags)592 nfp_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
nfp_net_tls_tx_undo(struct sk_buff * skb,u64 tls_handle)663 void 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
nfp_net_tx_timeout(struct net_device * netdev,unsigned int txqueue)685 static 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 */
693 static unsigned int
nfp_net_calc_fl_bufsz_data(struct nfp_net_dp * dp)694 nfp_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
nfp_net_calc_fl_bufsz(struct nfp_net_dp * dp)707 static 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
nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp * dp)721 static 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 */
nfp_net_vecs_init(struct nfp_net * nn)738 static 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
772 static void
nfp_net_napi_add(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec,int idx)773 nfp_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
782 static void
nfp_net_napi_del(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec)783 nfp_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
791 static void
nfp_net_vector_assign_rings(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec,int idx)792 nfp_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
814 static int
nfp_net_prepare_vector(struct nfp_net * nn,struct nfp_net_r_vector * r_vec,int idx)815 nfp_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, 0, r_vec->name,
825 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 disable_irq(r_vec->irq_vector);
832
833 irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
834
835 nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
836 r_vec->irq_entry);
837
838 return 0;
839 }
840
841 static void
nfp_net_cleanup_vector(struct nfp_net * nn,struct nfp_net_r_vector * r_vec)842 nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
843 {
844 irq_set_affinity_hint(r_vec->irq_vector, NULL);
845 nfp_net_napi_del(&nn->dp, r_vec);
846 free_irq(r_vec->irq_vector, r_vec);
847 }
848
849 /**
850 * nfp_net_rss_write_itbl() - Write RSS indirection table to device
851 * @nn: NFP Net device to reconfigure
852 */
nfp_net_rss_write_itbl(struct nfp_net * nn)853 void nfp_net_rss_write_itbl(struct nfp_net *nn)
854 {
855 int i;
856
857 for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
858 nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
859 get_unaligned_le32(nn->rss_itbl + i));
860 }
861
862 /**
863 * nfp_net_rss_write_key() - Write RSS hash key to device
864 * @nn: NFP Net device to reconfigure
865 */
nfp_net_rss_write_key(struct nfp_net * nn)866 void nfp_net_rss_write_key(struct nfp_net *nn)
867 {
868 int i;
869
870 for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4)
871 nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
872 get_unaligned_le32(nn->rss_key + i));
873 }
874
875 /**
876 * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
877 * @nn: NFP Net device to reconfigure
878 */
nfp_net_coalesce_write_cfg(struct nfp_net * nn)879 void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
880 {
881 u8 i;
882 u32 factor;
883 u32 value;
884
885 /* Compute factor used to convert coalesce '_usecs' parameters to
886 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
887 * count.
888 */
889 factor = nn->tlv_caps.me_freq_mhz / 16;
890
891 /* copy RX interrupt coalesce parameters */
892 value = (nn->rx_coalesce_max_frames << 16) |
893 (factor * nn->rx_coalesce_usecs);
894 for (i = 0; i < nn->dp.num_rx_rings; i++)
895 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
896
897 /* copy TX interrupt coalesce parameters */
898 value = (nn->tx_coalesce_max_frames << 16) |
899 (factor * nn->tx_coalesce_usecs);
900 for (i = 0; i < nn->dp.num_tx_rings; i++)
901 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
902 }
903
904 /**
905 * nfp_net_write_mac_addr() - Write mac address to the device control BAR
906 * @nn: NFP Net device to reconfigure
907 * @addr: MAC address to write
908 *
909 * Writes the MAC address from the netdev to the device control BAR. Does not
910 * perform the required reconfig. We do a bit of byte swapping dance because
911 * firmware is LE.
912 */
nfp_net_write_mac_addr(struct nfp_net * nn,const u8 * addr)913 static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr)
914 {
915 nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
916 nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
917 }
918
919 /**
920 * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
921 * @nn: NFP Net device to reconfigure
922 *
923 * Warning: must be fully idempotent.
924 */
nfp_net_clear_config_and_disable(struct nfp_net * nn)925 static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
926 {
927 u32 new_ctrl, new_ctrl_w1, update;
928 unsigned int r;
929 int err;
930
931 new_ctrl = nn->dp.ctrl;
932 new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
933 update = NFP_NET_CFG_UPDATE_GEN;
934 update |= NFP_NET_CFG_UPDATE_MSIX;
935 update |= NFP_NET_CFG_UPDATE_RING;
936
937 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
938 new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
939
940 if (!(nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN)) {
941 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
942 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
943 }
944
945 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
946 err = nfp_net_reconfig(nn, update);
947 if (err)
948 nn_err(nn, "Could not disable device: %d\n", err);
949
950 if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN) {
951 new_ctrl_w1 = nn->dp.ctrl_w1;
952 new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_FREELIST_EN;
953 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
954 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
955
956 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
957 err = nfp_net_reconfig(nn, update);
958 if (err)
959 nn_err(nn, "Could not disable FREELIST_EN: %d\n", err);
960 nn->dp.ctrl_w1 = new_ctrl_w1;
961 }
962
963 for (r = 0; r < nn->dp.num_rx_rings; r++) {
964 nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
965 if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx))
966 nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]);
967 }
968 for (r = 0; r < nn->dp.num_tx_rings; r++)
969 nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
970 for (r = 0; r < nn->dp.num_r_vecs; r++)
971 nfp_net_vec_clear_ring_data(nn, r);
972
973 nn->dp.ctrl = new_ctrl;
974 }
975
976 /**
977 * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
978 * @nn: NFP Net device to reconfigure
979 */
nfp_net_set_config_and_enable(struct nfp_net * nn)980 static int nfp_net_set_config_and_enable(struct nfp_net *nn)
981 {
982 u32 bufsz, new_ctrl, new_ctrl_w1, update = 0;
983 unsigned int r;
984 int err;
985
986 new_ctrl = nn->dp.ctrl;
987 new_ctrl_w1 = nn->dp.ctrl_w1;
988
989 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
990 nfp_net_rss_write_key(nn);
991 nfp_net_rss_write_itbl(nn);
992 nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
993 update |= NFP_NET_CFG_UPDATE_RSS;
994 }
995
996 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
997 nfp_net_coalesce_write_cfg(nn);
998 update |= NFP_NET_CFG_UPDATE_IRQMOD;
999 }
1000
1001 for (r = 0; r < nn->dp.num_tx_rings; r++)
1002 nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
1003 for (r = 0; r < nn->dp.num_rx_rings; r++)
1004 nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
1005
1006 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE,
1007 U64_MAX >> (64 - nn->dp.num_tx_rings));
1008
1009 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE,
1010 U64_MAX >> (64 - nn->dp.num_rx_rings));
1011
1012 if (nn->dp.netdev)
1013 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
1014
1015 nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
1016
1017 bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
1018 nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz);
1019
1020 /* Enable device
1021 * Step 1: Replace the CTRL_ENABLE by NFP_NET_CFG_CTRL_FREELIST_EN if
1022 * FREELIST_EN exits.
1023 */
1024 if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN)
1025 new_ctrl_w1 |= NFP_NET_CFG_CTRL_FREELIST_EN;
1026 else
1027 new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1028 update |= NFP_NET_CFG_UPDATE_GEN;
1029 update |= NFP_NET_CFG_UPDATE_MSIX;
1030 update |= NFP_NET_CFG_UPDATE_RING;
1031 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
1032 new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
1033
1034 /* Step 2: Send the configuration and write the freelist.
1035 * - The freelist only need to be written once.
1036 */
1037 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1038 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1039 err = nfp_net_reconfig(nn, update);
1040 if (err) {
1041 nfp_net_clear_config_and_disable(nn);
1042 return err;
1043 }
1044
1045 nn->dp.ctrl = new_ctrl;
1046 nn->dp.ctrl_w1 = new_ctrl_w1;
1047
1048 for (r = 0; r < nn->dp.num_rx_rings; r++)
1049 nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
1050
1051 /* Step 3: Do the NFP_NET_CFG_CTRL_ENABLE. Send the configuration.
1052 */
1053 if (nn->cap_w1 & NFP_NET_CFG_CTRL_FREELIST_EN) {
1054 new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1055 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1056
1057 err = nfp_net_reconfig(nn, update);
1058 if (err) {
1059 nfp_net_clear_config_and_disable(nn);
1060 return err;
1061 }
1062 nn->dp.ctrl = new_ctrl;
1063 }
1064
1065 return 0;
1066 }
1067
1068 /**
1069 * nfp_net_close_stack() - Quiesce the stack (part of close)
1070 * @nn: NFP Net device to reconfigure
1071 */
nfp_net_close_stack(struct nfp_net * nn)1072 static void nfp_net_close_stack(struct nfp_net *nn)
1073 {
1074 struct nfp_net_r_vector *r_vec;
1075 unsigned int r;
1076
1077 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1078 netif_carrier_off(nn->dp.netdev);
1079 nn->link_up = false;
1080
1081 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1082 r_vec = &nn->r_vecs[r];
1083
1084 disable_irq(r_vec->irq_vector);
1085 napi_disable(&r_vec->napi);
1086
1087 if (r_vec->rx_ring)
1088 cancel_work_sync(&r_vec->rx_dim.work);
1089
1090 if (r_vec->tx_ring)
1091 cancel_work_sync(&r_vec->tx_dim.work);
1092 }
1093
1094 netif_tx_disable(nn->dp.netdev);
1095 }
1096
1097 /**
1098 * nfp_net_close_free_all() - Free all runtime resources
1099 * @nn: NFP Net device to reconfigure
1100 */
nfp_net_close_free_all(struct nfp_net * nn)1101 static void nfp_net_close_free_all(struct nfp_net *nn)
1102 {
1103 unsigned int r;
1104
1105 nfp_net_tx_rings_free(&nn->dp);
1106 nfp_net_rx_rings_free(&nn->dp);
1107
1108 for (r = 0; r < nn->dp.num_r_vecs; r++)
1109 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1110
1111 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1112 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1113 }
1114
1115 /**
1116 * nfp_net_netdev_close() - Called when the device is downed
1117 * @netdev: netdev structure
1118 */
nfp_net_netdev_close(struct net_device * netdev)1119 static int nfp_net_netdev_close(struct net_device *netdev)
1120 {
1121 struct nfp_net *nn = netdev_priv(netdev);
1122
1123 /* Step 1: Disable RX and TX rings from the Linux kernel perspective
1124 */
1125 nfp_net_close_stack(nn);
1126
1127 /* Step 2: Tell NFP
1128 */
1129 if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER)
1130 __dev_mc_unsync(netdev, nfp_net_mc_unsync);
1131
1132 nfp_net_clear_config_and_disable(nn);
1133 nfp_port_configure(netdev, false);
1134
1135 /* Step 3: Free resources
1136 */
1137 nfp_net_close_free_all(nn);
1138
1139 nn_dbg(nn, "%s down", netdev->name);
1140 return 0;
1141 }
1142
nfp_ctrl_close(struct nfp_net * nn)1143 void nfp_ctrl_close(struct nfp_net *nn)
1144 {
1145 int r;
1146
1147 rtnl_lock();
1148
1149 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1150 disable_irq(nn->r_vecs[r].irq_vector);
1151 tasklet_disable(&nn->r_vecs[r].tasklet);
1152 }
1153
1154 nfp_net_clear_config_and_disable(nn);
1155
1156 nfp_net_close_free_all(nn);
1157
1158 rtnl_unlock();
1159 }
1160
nfp_net_rx_dim_work(struct work_struct * work)1161 static void nfp_net_rx_dim_work(struct work_struct *work)
1162 {
1163 struct nfp_net_r_vector *r_vec;
1164 unsigned int factor, value;
1165 struct dim_cq_moder moder;
1166 struct nfp_net *nn;
1167 struct dim *dim;
1168
1169 dim = container_of(work, struct dim, work);
1170 moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1171 r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim);
1172 nn = r_vec->nfp_net;
1173
1174 /* Compute factor used to convert coalesce '_usecs' parameters to
1175 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1176 * count.
1177 */
1178 factor = nn->tlv_caps.me_freq_mhz / 16;
1179 if (nfp_net_coalesce_para_check(factor * moder.usec) ||
1180 nfp_net_coalesce_para_check(moder.pkts))
1181 return;
1182
1183 /* copy RX interrupt coalesce parameters */
1184 value = (moder.pkts << 16) | (factor * moder.usec);
1185 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
1186 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1187
1188 dim->state = DIM_START_MEASURE;
1189 }
1190
nfp_net_tx_dim_work(struct work_struct * work)1191 static void nfp_net_tx_dim_work(struct work_struct *work)
1192 {
1193 struct nfp_net_r_vector *r_vec;
1194 unsigned int factor, value;
1195 struct dim_cq_moder moder;
1196 struct nfp_net *nn;
1197 struct dim *dim;
1198
1199 dim = container_of(work, struct dim, work);
1200 moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
1201 r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
1202 nn = r_vec->nfp_net;
1203
1204 /* Compute factor used to convert coalesce '_usecs' parameters to
1205 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1206 * count.
1207 */
1208 factor = nn->tlv_caps.me_freq_mhz / 16;
1209 if (nfp_net_coalesce_para_check(factor * moder.usec) ||
1210 nfp_net_coalesce_para_check(moder.pkts))
1211 return;
1212
1213 /* copy TX interrupt coalesce parameters */
1214 value = (moder.pkts << 16) | (factor * moder.usec);
1215 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
1216 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1217
1218 dim->state = DIM_START_MEASURE;
1219 }
1220
1221 /**
1222 * nfp_net_open_stack() - Start the device from stack's perspective
1223 * @nn: NFP Net device to reconfigure
1224 */
nfp_net_open_stack(struct nfp_net * nn)1225 static void nfp_net_open_stack(struct nfp_net *nn)
1226 {
1227 struct nfp_net_r_vector *r_vec;
1228 unsigned int r;
1229
1230 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1231 r_vec = &nn->r_vecs[r];
1232
1233 if (r_vec->rx_ring) {
1234 INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
1235 r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1236 }
1237
1238 if (r_vec->tx_ring) {
1239 INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
1240 r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1241 }
1242
1243 napi_enable(&r_vec->napi);
1244 enable_irq(r_vec->irq_vector);
1245 }
1246
1247 netif_tx_wake_all_queues(nn->dp.netdev);
1248
1249 enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1250 nfp_net_read_link_status(nn);
1251 }
1252
nfp_net_open_alloc_all(struct nfp_net * nn)1253 static int nfp_net_open_alloc_all(struct nfp_net *nn)
1254 {
1255 int err, r;
1256
1257 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
1258 nn->exn_name, sizeof(nn->exn_name),
1259 NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
1260 if (err)
1261 return err;
1262 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
1263 nn->lsc_name, sizeof(nn->lsc_name),
1264 NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
1265 if (err)
1266 goto err_free_exn;
1267 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1268
1269 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1270 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1271 if (err)
1272 goto err_cleanup_vec_p;
1273 }
1274
1275 err = nfp_net_rx_rings_prepare(nn, &nn->dp);
1276 if (err)
1277 goto err_cleanup_vec;
1278
1279 err = nfp_net_tx_rings_prepare(nn, &nn->dp);
1280 if (err)
1281 goto err_free_rx_rings;
1282
1283 for (r = 0; r < nn->max_r_vecs; r++)
1284 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1285
1286 return 0;
1287
1288 err_free_rx_rings:
1289 nfp_net_rx_rings_free(&nn->dp);
1290 err_cleanup_vec:
1291 r = nn->dp.num_r_vecs;
1292 err_cleanup_vec_p:
1293 while (r--)
1294 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1295 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1296 err_free_exn:
1297 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1298 return err;
1299 }
1300
nfp_net_netdev_open(struct net_device * netdev)1301 static int nfp_net_netdev_open(struct net_device *netdev)
1302 {
1303 struct nfp_net *nn = netdev_priv(netdev);
1304 int err;
1305
1306 /* Step 1: Allocate resources for rings and the like
1307 * - Request interrupts
1308 * - Allocate RX and TX ring resources
1309 * - Setup initial RSS table
1310 */
1311 err = nfp_net_open_alloc_all(nn);
1312 if (err)
1313 return err;
1314
1315 err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
1316 if (err)
1317 goto err_free_all;
1318
1319 err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
1320 if (err)
1321 goto err_free_all;
1322
1323 /* Step 2: Configure the NFP
1324 * - Ifup the physical interface if it exists
1325 * - Enable rings from 0 to tx_rings/rx_rings - 1.
1326 * - Write MAC address (in case it changed)
1327 * - Set the MTU
1328 * - Set the Freelist buffer size
1329 * - Enable the FW
1330 */
1331 err = nfp_port_configure(netdev, true);
1332 if (err)
1333 goto err_free_all;
1334
1335 err = nfp_net_set_config_and_enable(nn);
1336 if (err)
1337 goto err_port_disable;
1338
1339 /* Step 3: Enable for kernel
1340 * - put some freelist descriptors on each RX ring
1341 * - enable NAPI on each ring
1342 * - enable all TX queues
1343 * - set link state
1344 */
1345 nfp_net_open_stack(nn);
1346
1347 return 0;
1348
1349 err_port_disable:
1350 nfp_port_configure(netdev, false);
1351 err_free_all:
1352 nfp_net_close_free_all(nn);
1353 return err;
1354 }
1355
nfp_ctrl_open(struct nfp_net * nn)1356 int nfp_ctrl_open(struct nfp_net *nn)
1357 {
1358 int err, r;
1359
1360 /* ring dumping depends on vNICs being opened/closed under rtnl */
1361 rtnl_lock();
1362
1363 err = nfp_net_open_alloc_all(nn);
1364 if (err)
1365 goto err_unlock;
1366
1367 err = nfp_net_set_config_and_enable(nn);
1368 if (err)
1369 goto err_free_all;
1370
1371 for (r = 0; r < nn->dp.num_r_vecs; r++)
1372 enable_irq(nn->r_vecs[r].irq_vector);
1373
1374 rtnl_unlock();
1375
1376 return 0;
1377
1378 err_free_all:
1379 nfp_net_close_free_all(nn);
1380 err_unlock:
1381 rtnl_unlock();
1382 return err;
1383 }
1384
nfp_net_sched_mbox_amsg_work(struct nfp_net * nn,u32 cmd,const void * data,size_t len,int (* cb)(struct nfp_net *,struct nfp_mbox_amsg_entry *))1385 int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len,
1386 int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *))
1387 {
1388 struct nfp_mbox_amsg_entry *entry;
1389
1390 entry = kmalloc(sizeof(*entry) + len, GFP_ATOMIC);
1391 if (!entry)
1392 return -ENOMEM;
1393
1394 memcpy(entry->msg, data, len);
1395 entry->cmd = cmd;
1396 entry->cfg = cb;
1397
1398 spin_lock_bh(&nn->mbox_amsg.lock);
1399 list_add_tail(&entry->list, &nn->mbox_amsg.list);
1400 spin_unlock_bh(&nn->mbox_amsg.lock);
1401
1402 schedule_work(&nn->mbox_amsg.work);
1403
1404 return 0;
1405 }
1406
nfp_net_mbox_amsg_work(struct work_struct * work)1407 static void nfp_net_mbox_amsg_work(struct work_struct *work)
1408 {
1409 struct nfp_net *nn = container_of(work, struct nfp_net, mbox_amsg.work);
1410 struct nfp_mbox_amsg_entry *entry, *tmp;
1411 struct list_head tmp_list;
1412
1413 INIT_LIST_HEAD(&tmp_list);
1414
1415 spin_lock_bh(&nn->mbox_amsg.lock);
1416 list_splice_init(&nn->mbox_amsg.list, &tmp_list);
1417 spin_unlock_bh(&nn->mbox_amsg.lock);
1418
1419 list_for_each_entry_safe(entry, tmp, &tmp_list, list) {
1420 int err = entry->cfg(nn, entry);
1421
1422 if (err)
1423 nn_err(nn, "Config cmd %d to HW failed %d.\n", entry->cmd, err);
1424
1425 list_del(&entry->list);
1426 kfree(entry);
1427 }
1428 }
1429
nfp_net_mc_cfg(struct nfp_net * nn,struct nfp_mbox_amsg_entry * entry)1430 static int nfp_net_mc_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry)
1431 {
1432 unsigned char *addr = entry->msg;
1433 int ret;
1434
1435 ret = nfp_net_mbox_lock(nn, NFP_NET_CFG_MULTICAST_SZ);
1436 if (ret)
1437 return ret;
1438
1439 nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_HI,
1440 get_unaligned_be32(addr));
1441 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_LO,
1442 get_unaligned_be16(addr + 4));
1443
1444 return nfp_net_mbox_reconfig_and_unlock(nn, entry->cmd);
1445 }
1446
nfp_net_mc_sync(struct net_device * netdev,const unsigned char * addr)1447 static int nfp_net_mc_sync(struct net_device *netdev, const unsigned char *addr)
1448 {
1449 struct nfp_net *nn = netdev_priv(netdev);
1450
1451 if (netdev_mc_count(netdev) > NFP_NET_CFG_MAC_MC_MAX) {
1452 nn_err(nn, "Requested number of MC addresses (%d) exceeds maximum (%d).\n",
1453 netdev_mc_count(netdev), NFP_NET_CFG_MAC_MC_MAX);
1454 return -EINVAL;
1455 }
1456
1457 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_ADD, addr,
1458 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1459 }
1460
nfp_net_mc_unsync(struct net_device * netdev,const unsigned char * addr)1461 static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr)
1462 {
1463 struct nfp_net *nn = netdev_priv(netdev);
1464
1465 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_DEL, addr,
1466 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1467 }
1468
nfp_net_set_rx_mode(struct net_device * netdev)1469 static void nfp_net_set_rx_mode(struct net_device *netdev)
1470 {
1471 struct nfp_net *nn = netdev_priv(netdev);
1472 u32 new_ctrl, new_ctrl_w1;
1473
1474 new_ctrl = nn->dp.ctrl;
1475 new_ctrl_w1 = nn->dp.ctrl_w1;
1476
1477 if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
1478 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
1479 else
1480 new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
1481
1482 if (netdev->flags & IFF_ALLMULTI)
1483 new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_MCAST_FILTER;
1484 else
1485 new_ctrl_w1 |= nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER;
1486
1487 if (netdev->flags & IFF_PROMISC) {
1488 if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
1489 new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
1490 else
1491 nn_warn(nn, "FW does not support promiscuous mode\n");
1492 } else {
1493 new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
1494 }
1495
1496 if ((nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) &&
1497 __dev_mc_sync(netdev, nfp_net_mc_sync, nfp_net_mc_unsync))
1498 netdev_err(netdev, "Sync mc address failed\n");
1499
1500 if (new_ctrl == nn->dp.ctrl && new_ctrl_w1 == nn->dp.ctrl_w1)
1501 return;
1502
1503 if (new_ctrl != nn->dp.ctrl)
1504 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1505 if (new_ctrl_w1 != nn->dp.ctrl_w1)
1506 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1507 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
1508
1509 nn->dp.ctrl = new_ctrl;
1510 nn->dp.ctrl_w1 = new_ctrl_w1;
1511 }
1512
nfp_net_rss_init_itbl(struct nfp_net * nn)1513 static void nfp_net_rss_init_itbl(struct nfp_net *nn)
1514 {
1515 int i;
1516
1517 for (i = 0; i < sizeof(nn->rss_itbl); i++)
1518 nn->rss_itbl[i] =
1519 ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
1520 }
1521
nfp_net_dp_swap(struct nfp_net * nn,struct nfp_net_dp * dp)1522 static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
1523 {
1524 struct nfp_net_dp new_dp = *dp;
1525
1526 *dp = nn->dp;
1527 nn->dp = new_dp;
1528
1529 WRITE_ONCE(nn->dp.netdev->mtu, new_dp.mtu);
1530
1531 if (!netif_is_rxfh_configured(nn->dp.netdev))
1532 nfp_net_rss_init_itbl(nn);
1533 }
1534
nfp_net_dp_swap_enable(struct nfp_net * nn,struct nfp_net_dp * dp)1535 static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
1536 {
1537 unsigned int r;
1538 int err;
1539
1540 nfp_net_dp_swap(nn, dp);
1541
1542 for (r = 0; r < nn->max_r_vecs; r++)
1543 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1544
1545 err = netif_set_real_num_queues(nn->dp.netdev,
1546 nn->dp.num_stack_tx_rings,
1547 nn->dp.num_rx_rings);
1548 if (err)
1549 return err;
1550
1551 return nfp_net_set_config_and_enable(nn);
1552 }
1553
nfp_net_clone_dp(struct nfp_net * nn)1554 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
1555 {
1556 struct nfp_net_dp *new;
1557
1558 new = kmalloc(sizeof(*new), GFP_KERNEL);
1559 if (!new)
1560 return NULL;
1561
1562 *new = nn->dp;
1563
1564 new->xsk_pools = kmemdup(new->xsk_pools,
1565 array_size(nn->max_r_vecs,
1566 sizeof(new->xsk_pools)),
1567 GFP_KERNEL);
1568 if (!new->xsk_pools) {
1569 kfree(new);
1570 return NULL;
1571 }
1572
1573 /* Clear things which need to be recomputed */
1574 new->fl_bufsz = 0;
1575 new->tx_rings = NULL;
1576 new->rx_rings = NULL;
1577 new->num_r_vecs = 0;
1578 new->num_stack_tx_rings = 0;
1579 new->txrwb = NULL;
1580 new->txrwb_dma = 0;
1581
1582 return new;
1583 }
1584
nfp_net_free_dp(struct nfp_net_dp * dp)1585 static void nfp_net_free_dp(struct nfp_net_dp *dp)
1586 {
1587 kfree(dp->xsk_pools);
1588 kfree(dp);
1589 }
1590
1591 static int
nfp_net_check_config(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1592 nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
1593 struct netlink_ext_ack *extack)
1594 {
1595 unsigned int r, xsk_min_fl_bufsz;
1596
1597 /* XDP-enabled tests */
1598 if (!dp->xdp_prog)
1599 return 0;
1600 if (dp->fl_bufsz > PAGE_SIZE) {
1601 NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
1602 return -EINVAL;
1603 }
1604 if (dp->num_tx_rings > nn->max_tx_rings) {
1605 NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
1606 return -EINVAL;
1607 }
1608
1609 xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp);
1610 for (r = 0; r < nn->max_r_vecs; r++) {
1611 if (!dp->xsk_pools[r])
1612 continue;
1613
1614 if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) {
1615 NL_SET_ERR_MSG_MOD(extack,
1616 "XSK buffer pool chunk size too small");
1617 return -EINVAL;
1618 }
1619 }
1620
1621 return 0;
1622 }
1623
nfp_net_ring_reconfig(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1624 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
1625 struct netlink_ext_ack *extack)
1626 {
1627 int r, err;
1628
1629 dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
1630
1631 dp->num_stack_tx_rings = dp->num_tx_rings;
1632 if (dp->xdp_prog)
1633 dp->num_stack_tx_rings -= dp->num_rx_rings;
1634
1635 dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
1636
1637 err = nfp_net_check_config(nn, dp, extack);
1638 if (err)
1639 goto exit_free_dp;
1640
1641 if (!netif_running(dp->netdev)) {
1642 nfp_net_dp_swap(nn, dp);
1643 err = 0;
1644 goto exit_free_dp;
1645 }
1646
1647 /* Prepare new rings */
1648 for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
1649 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1650 if (err) {
1651 dp->num_r_vecs = r;
1652 goto err_cleanup_vecs;
1653 }
1654 }
1655
1656 err = nfp_net_rx_rings_prepare(nn, dp);
1657 if (err)
1658 goto err_cleanup_vecs;
1659
1660 err = nfp_net_tx_rings_prepare(nn, dp);
1661 if (err)
1662 goto err_free_rx;
1663
1664 /* Stop device, swap in new rings, try to start the firmware */
1665 nfp_net_close_stack(nn);
1666 nfp_net_clear_config_and_disable(nn);
1667
1668 err = nfp_net_dp_swap_enable(nn, dp);
1669 if (err) {
1670 int err2;
1671
1672 nfp_net_clear_config_and_disable(nn);
1673
1674 /* Try with old configuration and old rings */
1675 err2 = nfp_net_dp_swap_enable(nn, dp);
1676 if (err2)
1677 nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
1678 err, err2);
1679 }
1680 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1681 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1682
1683 nfp_net_rx_rings_free(dp);
1684 nfp_net_tx_rings_free(dp);
1685
1686 nfp_net_open_stack(nn);
1687 exit_free_dp:
1688 nfp_net_free_dp(dp);
1689
1690 return err;
1691
1692 err_free_rx:
1693 nfp_net_rx_rings_free(dp);
1694 err_cleanup_vecs:
1695 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1696 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1697 nfp_net_free_dp(dp);
1698 return err;
1699 }
1700
nfp_net_change_mtu(struct net_device * netdev,int new_mtu)1701 static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
1702 {
1703 struct nfp_net *nn = netdev_priv(netdev);
1704 struct nfp_net_dp *dp;
1705 int err;
1706
1707 err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
1708 if (err)
1709 return err;
1710
1711 dp = nfp_net_clone_dp(nn);
1712 if (!dp)
1713 return -ENOMEM;
1714
1715 dp->mtu = new_mtu;
1716
1717 return nfp_net_ring_reconfig(nn, dp, NULL);
1718 }
1719
1720 static int
nfp_net_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)1721 nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1722 {
1723 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
1724 struct nfp_net *nn = netdev_priv(netdev);
1725 int err;
1726
1727 /* Priority tagged packets with vlan id 0 are processed by the
1728 * NFP as untagged packets
1729 */
1730 if (!vid)
1731 return 0;
1732
1733 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1734 if (err)
1735 return err;
1736
1737 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1738 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1739 ETH_P_8021Q);
1740
1741 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1742 }
1743
1744 static int
nfp_net_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)1745 nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1746 {
1747 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
1748 struct nfp_net *nn = netdev_priv(netdev);
1749 int err;
1750
1751 /* Priority tagged packets with vlan id 0 are processed by the
1752 * NFP as untagged packets
1753 */
1754 if (!vid)
1755 return 0;
1756
1757 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1758 if (err)
1759 return err;
1760
1761 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1762 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1763 ETH_P_8021Q);
1764
1765 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1766 }
1767
1768 static void
nfp_net_fs_fill_v4(struct nfp_net * nn,struct nfp_fs_entry * entry,u32 op,u32 * addr)1769 nfp_net_fs_fill_v4(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr)
1770 {
1771 unsigned int i;
1772
1773 union {
1774 struct {
1775 __be16 loc;
1776 u8 k_proto, m_proto;
1777 __be32 k_sip, m_sip, k_dip, m_dip;
1778 __be16 k_sport, m_sport, k_dport, m_dport;
1779 };
1780 __be32 val[7];
1781 } v4_rule;
1782
1783 nn_writel(nn, *addr, op);
1784 *addr += sizeof(u32);
1785
1786 v4_rule.loc = cpu_to_be16(entry->loc);
1787 v4_rule.k_proto = entry->key.l4_proto;
1788 v4_rule.m_proto = entry->msk.l4_proto;
1789 v4_rule.k_sip = entry->key.sip4;
1790 v4_rule.m_sip = entry->msk.sip4;
1791 v4_rule.k_dip = entry->key.dip4;
1792 v4_rule.m_dip = entry->msk.dip4;
1793 v4_rule.k_sport = entry->key.sport;
1794 v4_rule.m_sport = entry->msk.sport;
1795 v4_rule.k_dport = entry->key.dport;
1796 v4_rule.m_dport = entry->msk.dport;
1797
1798 for (i = 0; i < ARRAY_SIZE(v4_rule.val); i++, *addr += sizeof(__be32))
1799 nn_writel(nn, *addr, be32_to_cpu(v4_rule.val[i]));
1800 }
1801
1802 static void
nfp_net_fs_fill_v6(struct nfp_net * nn,struct nfp_fs_entry * entry,u32 op,u32 * addr)1803 nfp_net_fs_fill_v6(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr)
1804 {
1805 unsigned int i;
1806
1807 union {
1808 struct {
1809 __be16 loc;
1810 u8 k_proto, m_proto;
1811 __be32 k_sip[4], m_sip[4], k_dip[4], m_dip[4];
1812 __be16 k_sport, m_sport, k_dport, m_dport;
1813 };
1814 __be32 val[19];
1815 } v6_rule;
1816
1817 nn_writel(nn, *addr, op);
1818 *addr += sizeof(u32);
1819
1820 v6_rule.loc = cpu_to_be16(entry->loc);
1821 v6_rule.k_proto = entry->key.l4_proto;
1822 v6_rule.m_proto = entry->msk.l4_proto;
1823 for (i = 0; i < 4; i++) {
1824 v6_rule.k_sip[i] = entry->key.sip6[i];
1825 v6_rule.m_sip[i] = entry->msk.sip6[i];
1826 v6_rule.k_dip[i] = entry->key.dip6[i];
1827 v6_rule.m_dip[i] = entry->msk.dip6[i];
1828 }
1829 v6_rule.k_sport = entry->key.sport;
1830 v6_rule.m_sport = entry->msk.sport;
1831 v6_rule.k_dport = entry->key.dport;
1832 v6_rule.m_dport = entry->msk.dport;
1833
1834 for (i = 0; i < ARRAY_SIZE(v6_rule.val); i++, *addr += sizeof(__be32))
1835 nn_writel(nn, *addr, be32_to_cpu(v6_rule.val[i]));
1836 }
1837
1838 #define NFP_FS_QUEUE_ID GENMASK(22, 16)
1839 #define NFP_FS_ACT GENMASK(15, 0)
1840 #define NFP_FS_ACT_DROP BIT(0)
1841 #define NFP_FS_ACT_Q BIT(1)
1842 static void
nfp_net_fs_fill_act(struct nfp_net * nn,struct nfp_fs_entry * entry,u32 addr)1843 nfp_net_fs_fill_act(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 addr)
1844 {
1845 u32 action = 0; /* 0 means default passthrough */
1846
1847 if (entry->action == RX_CLS_FLOW_DISC)
1848 action = NFP_FS_ACT_DROP;
1849 else if (!(entry->flow_type & FLOW_RSS))
1850 action = FIELD_PREP(NFP_FS_QUEUE_ID, entry->action) | NFP_FS_ACT_Q;
1851
1852 nn_writel(nn, addr, action);
1853 }
1854
nfp_net_fs_add_hw(struct nfp_net * nn,struct nfp_fs_entry * entry)1855 int nfp_net_fs_add_hw(struct nfp_net *nn, struct nfp_fs_entry *entry)
1856 {
1857 u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL;
1858 int err;
1859
1860 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ);
1861 if (err)
1862 return err;
1863
1864 switch (entry->flow_type & ~FLOW_RSS) {
1865 case TCP_V4_FLOW:
1866 case UDP_V4_FLOW:
1867 case SCTP_V4_FLOW:
1868 case IPV4_USER_FLOW:
1869 nfp_net_fs_fill_v4(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_ADD_V4, &addr);
1870 break;
1871 case TCP_V6_FLOW:
1872 case UDP_V6_FLOW:
1873 case SCTP_V6_FLOW:
1874 case IPV6_USER_FLOW:
1875 nfp_net_fs_fill_v6(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_ADD_V6, &addr);
1876 break;
1877 case ETHER_FLOW:
1878 nn_writel(nn, addr, NFP_NET_CFG_MBOX_CMD_FS_ADD_ETHTYPE);
1879 addr += sizeof(u32);
1880 nn_writew(nn, addr, be16_to_cpu(entry->key.l3_proto));
1881 addr += sizeof(u32);
1882 break;
1883 }
1884
1885 nfp_net_fs_fill_act(nn, entry, addr);
1886
1887 err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER);
1888 if (err) {
1889 nn_err(nn, "Add new fs rule failed with %d\n", err);
1890 return -EIO;
1891 }
1892
1893 return 0;
1894 }
1895
nfp_net_fs_del_hw(struct nfp_net * nn,struct nfp_fs_entry * entry)1896 int nfp_net_fs_del_hw(struct nfp_net *nn, struct nfp_fs_entry *entry)
1897 {
1898 u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL;
1899 int err;
1900
1901 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ);
1902 if (err)
1903 return err;
1904
1905 switch (entry->flow_type & ~FLOW_RSS) {
1906 case TCP_V4_FLOW:
1907 case UDP_V4_FLOW:
1908 case SCTP_V4_FLOW:
1909 case IPV4_USER_FLOW:
1910 nfp_net_fs_fill_v4(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_DEL_V4, &addr);
1911 break;
1912 case TCP_V6_FLOW:
1913 case UDP_V6_FLOW:
1914 case SCTP_V6_FLOW:
1915 case IPV6_USER_FLOW:
1916 nfp_net_fs_fill_v6(nn, entry, NFP_NET_CFG_MBOX_CMD_FS_DEL_V6, &addr);
1917 break;
1918 case ETHER_FLOW:
1919 nn_writel(nn, addr, NFP_NET_CFG_MBOX_CMD_FS_DEL_ETHTYPE);
1920 addr += sizeof(u32);
1921 nn_writew(nn, addr, be16_to_cpu(entry->key.l3_proto));
1922 addr += sizeof(u32);
1923 break;
1924 }
1925
1926 nfp_net_fs_fill_act(nn, entry, addr);
1927
1928 err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER);
1929 if (err) {
1930 nn_err(nn, "Delete fs rule failed with %d\n", err);
1931 return -EIO;
1932 }
1933
1934 return 0;
1935 }
1936
nfp_net_fs_clean(struct nfp_net * nn)1937 static void nfp_net_fs_clean(struct nfp_net *nn)
1938 {
1939 struct nfp_fs_entry *entry, *tmp;
1940
1941 list_for_each_entry_safe(entry, tmp, &nn->fs.list, node) {
1942 nfp_net_fs_del_hw(nn, entry);
1943 list_del(&entry->node);
1944 kfree(entry);
1945 }
1946 }
1947
nfp_net_stat64(struct net_device * netdev,struct rtnl_link_stats64 * stats)1948 static void nfp_net_stat64(struct net_device *netdev,
1949 struct rtnl_link_stats64 *stats)
1950 {
1951 struct nfp_net *nn = netdev_priv(netdev);
1952 int r;
1953
1954 /* Collect software stats */
1955 for (r = 0; r < nn->max_r_vecs; r++) {
1956 struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
1957 u64 data[3];
1958 unsigned int start;
1959
1960 do {
1961 start = u64_stats_fetch_begin(&r_vec->rx_sync);
1962 data[0] = r_vec->rx_pkts;
1963 data[1] = r_vec->rx_bytes;
1964 data[2] = r_vec->rx_drops;
1965 } while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
1966 stats->rx_packets += data[0];
1967 stats->rx_bytes += data[1];
1968 stats->rx_dropped += data[2];
1969
1970 do {
1971 start = u64_stats_fetch_begin(&r_vec->tx_sync);
1972 data[0] = r_vec->tx_pkts;
1973 data[1] = r_vec->tx_bytes;
1974 data[2] = r_vec->tx_errors;
1975 } while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
1976 stats->tx_packets += data[0];
1977 stats->tx_bytes += data[1];
1978 stats->tx_errors += data[2];
1979 }
1980
1981 /* Add in device stats */
1982 stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
1983 stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
1984 stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
1985
1986 stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
1987 stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
1988 }
1989
nfp_net_set_features(struct net_device * netdev,netdev_features_t features)1990 static int nfp_net_set_features(struct net_device *netdev,
1991 netdev_features_t features)
1992 {
1993 netdev_features_t changed = netdev->features ^ features;
1994 struct nfp_net *nn = netdev_priv(netdev);
1995 u32 new_ctrl;
1996 int err;
1997
1998 /* Assume this is not called with features we have not advertised */
1999
2000 new_ctrl = nn->dp.ctrl;
2001
2002 if (changed & NETIF_F_RXCSUM) {
2003 if (features & NETIF_F_RXCSUM)
2004 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2005 else
2006 new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
2007 }
2008
2009 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
2010 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
2011 new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2012 else
2013 new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
2014 }
2015
2016 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
2017 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
2018 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2019 NFP_NET_CFG_CTRL_LSO;
2020 else
2021 new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
2022 }
2023
2024 if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
2025 if (features & NETIF_F_HW_VLAN_CTAG_RX)
2026 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2027 NFP_NET_CFG_CTRL_RXVLAN;
2028 else
2029 new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY;
2030 }
2031
2032 if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
2033 if (features & NETIF_F_HW_VLAN_CTAG_TX)
2034 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2035 NFP_NET_CFG_CTRL_TXVLAN;
2036 else
2037 new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY;
2038 }
2039
2040 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
2041 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
2042 new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2043 else
2044 new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
2045 }
2046
2047 if (changed & NETIF_F_HW_VLAN_STAG_RX) {
2048 if (features & NETIF_F_HW_VLAN_STAG_RX)
2049 new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2050 else
2051 new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2052 }
2053
2054 if (changed & NETIF_F_SG) {
2055 if (features & NETIF_F_SG)
2056 new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
2057 else
2058 new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
2059 }
2060
2061 err = nfp_port_set_features(netdev, features);
2062 if (err)
2063 return err;
2064
2065 nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
2066 netdev->features, features, changed);
2067
2068 if (new_ctrl == nn->dp.ctrl)
2069 return 0;
2070
2071 nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
2072 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2073 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2074 if (err)
2075 return err;
2076
2077 nn->dp.ctrl = new_ctrl;
2078
2079 return 0;
2080 }
2081
2082 static netdev_features_t
nfp_net_fix_features(struct net_device * netdev,netdev_features_t features)2083 nfp_net_fix_features(struct net_device *netdev,
2084 netdev_features_t features)
2085 {
2086 if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
2087 (features & NETIF_F_HW_VLAN_STAG_RX)) {
2088 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2089 features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2090 netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2091 netdev_warn(netdev,
2092 "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n");
2093 } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) {
2094 features &= ~NETIF_F_HW_VLAN_STAG_RX;
2095 netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX;
2096 netdev_warn(netdev,
2097 "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n");
2098 }
2099 }
2100 return features;
2101 }
2102
2103 static netdev_features_t
nfp_net_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)2104 nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
2105 netdev_features_t features)
2106 {
2107 u8 l4_hdr;
2108
2109 /* We can't do TSO over double tagged packets (802.1AD) */
2110 features &= vlan_features_check(skb, features);
2111
2112 if (!skb->encapsulation)
2113 return features;
2114
2115 /* Ensure that inner L4 header offset fits into TX descriptor field */
2116 if (skb_is_gso(skb)) {
2117 u32 hdrlen;
2118
2119 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4)
2120 hdrlen = skb_inner_transport_offset(skb) + sizeof(struct udphdr);
2121 else
2122 hdrlen = skb_inner_tcp_all_headers(skb);
2123
2124 /* Assume worst case scenario of having longest possible
2125 * metadata prepend - 8B
2126 */
2127 if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
2128 features &= ~NETIF_F_GSO_MASK;
2129 }
2130
2131 if (xfrm_offload(skb))
2132 return features;
2133
2134 /* VXLAN/GRE check */
2135 switch (vlan_get_protocol(skb)) {
2136 case htons(ETH_P_IP):
2137 l4_hdr = ip_hdr(skb)->protocol;
2138 break;
2139 case htons(ETH_P_IPV6):
2140 l4_hdr = ipv6_hdr(skb)->nexthdr;
2141 break;
2142 default:
2143 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2144 }
2145
2146 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
2147 skb->inner_protocol != htons(ETH_P_TEB) ||
2148 (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
2149 (l4_hdr == IPPROTO_UDP &&
2150 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
2151 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
2152 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
2153
2154 return features;
2155 }
2156
2157 static int
nfp_net_get_phys_port_name(struct net_device * netdev,char * name,size_t len)2158 nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
2159 {
2160 struct nfp_net *nn = netdev_priv(netdev);
2161 int n;
2162
2163 /* If port is defined, devlink_port is registered and devlink core
2164 * is taking care of name formatting.
2165 */
2166 if (nn->port)
2167 return -EOPNOTSUPP;
2168
2169 if (nn->dp.is_vf || nn->vnic_no_name)
2170 return -EOPNOTSUPP;
2171
2172 n = snprintf(name, len, "n%d", nn->id);
2173 if (n >= len)
2174 return -EINVAL;
2175
2176 return 0;
2177 }
2178
nfp_net_xdp_setup_drv(struct nfp_net * nn,struct netdev_bpf * bpf)2179 static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
2180 {
2181 struct bpf_prog *prog = bpf->prog;
2182 struct nfp_net_dp *dp;
2183 int err;
2184
2185 if (!prog == !nn->dp.xdp_prog) {
2186 WRITE_ONCE(nn->dp.xdp_prog, prog);
2187 xdp_attachment_setup(&nn->xdp, bpf);
2188 return 0;
2189 }
2190
2191 dp = nfp_net_clone_dp(nn);
2192 if (!dp)
2193 return -ENOMEM;
2194
2195 dp->xdp_prog = prog;
2196 dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
2197 dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
2198 dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
2199
2200 /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
2201 err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
2202 if (err)
2203 return err;
2204
2205 xdp_attachment_setup(&nn->xdp, bpf);
2206 return 0;
2207 }
2208
nfp_net_xdp_setup_hw(struct nfp_net * nn,struct netdev_bpf * bpf)2209 static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
2210 {
2211 int err;
2212
2213 err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
2214 if (err)
2215 return err;
2216
2217 xdp_attachment_setup(&nn->xdp_hw, bpf);
2218 return 0;
2219 }
2220
nfp_net_xdp(struct net_device * netdev,struct netdev_bpf * xdp)2221 static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
2222 {
2223 struct nfp_net *nn = netdev_priv(netdev);
2224
2225 switch (xdp->command) {
2226 case XDP_SETUP_PROG:
2227 return nfp_net_xdp_setup_drv(nn, xdp);
2228 case XDP_SETUP_PROG_HW:
2229 return nfp_net_xdp_setup_hw(nn, xdp);
2230 case XDP_SETUP_XSK_POOL:
2231 return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool,
2232 xdp->xsk.queue_id);
2233 default:
2234 return nfp_app_bpf(nn->app, nn, xdp);
2235 }
2236 }
2237
nfp_net_set_mac_address(struct net_device * netdev,void * addr)2238 static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
2239 {
2240 struct nfp_net *nn = netdev_priv(netdev);
2241 struct sockaddr *saddr = addr;
2242 int err;
2243
2244 err = eth_prepare_mac_addr_change(netdev, addr);
2245 if (err)
2246 return err;
2247
2248 nfp_net_write_mac_addr(nn, saddr->sa_data);
2249
2250 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
2251 if (err)
2252 return err;
2253
2254 eth_commit_mac_addr_change(netdev, addr);
2255
2256 return 0;
2257 }
2258
nfp_net_bridge_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)2259 static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2260 struct net_device *dev, u32 filter_mask,
2261 int nlflags)
2262 {
2263 struct nfp_net *nn = netdev_priv(dev);
2264 u16 mode;
2265
2266 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2267 return -EOPNOTSUPP;
2268
2269 mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ?
2270 BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB;
2271
2272 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
2273 nlflags, filter_mask, NULL);
2274 }
2275
nfp_net_bridge_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)2276 static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
2277 u16 flags, struct netlink_ext_ack *extack)
2278 {
2279 struct nfp_net *nn = netdev_priv(dev);
2280 struct nlattr *attr, *br_spec;
2281 int rem, err;
2282 u32 new_ctrl;
2283 u16 mode;
2284
2285 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2286 return -EOPNOTSUPP;
2287
2288 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2289 if (!br_spec)
2290 return -EINVAL;
2291
2292 nla_for_each_nested_type(attr, IFLA_BRIDGE_MODE, br_spec, rem) {
2293 new_ctrl = nn->dp.ctrl;
2294 mode = nla_get_u16(attr);
2295 if (mode == BRIDGE_MODE_VEPA)
2296 new_ctrl |= NFP_NET_CFG_CTRL_VEPA;
2297 else if (mode == BRIDGE_MODE_VEB)
2298 new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA;
2299 else
2300 return -EOPNOTSUPP;
2301
2302 if (new_ctrl == nn->dp.ctrl)
2303 return 0;
2304
2305 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2306 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2307 if (!err)
2308 nn->dp.ctrl = new_ctrl;
2309
2310 return err;
2311 }
2312
2313 return -EINVAL;
2314 }
2315
2316 const struct net_device_ops nfp_nfd3_netdev_ops = {
2317 .ndo_init = nfp_app_ndo_init,
2318 .ndo_uninit = nfp_app_ndo_uninit,
2319 .ndo_open = nfp_net_netdev_open,
2320 .ndo_stop = nfp_net_netdev_close,
2321 .ndo_start_xmit = nfp_net_tx,
2322 .ndo_get_stats64 = nfp_net_stat64,
2323 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2324 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2325 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2326 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2327 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2328 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2329 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2330 .ndo_get_vf_config = nfp_app_get_vf_config,
2331 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2332 .ndo_setup_tc = nfp_port_setup_tc,
2333 .ndo_tx_timeout = nfp_net_tx_timeout,
2334 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2335 .ndo_change_mtu = nfp_net_change_mtu,
2336 .ndo_set_mac_address = nfp_net_set_mac_address,
2337 .ndo_set_features = nfp_net_set_features,
2338 .ndo_fix_features = nfp_net_fix_features,
2339 .ndo_features_check = nfp_net_features_check,
2340 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2341 .ndo_bpf = nfp_net_xdp,
2342 .ndo_xsk_wakeup = nfp_net_xsk_wakeup,
2343 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2344 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2345 };
2346
2347 const struct net_device_ops nfp_nfdk_netdev_ops = {
2348 .ndo_init = nfp_app_ndo_init,
2349 .ndo_uninit = nfp_app_ndo_uninit,
2350 .ndo_open = nfp_net_netdev_open,
2351 .ndo_stop = nfp_net_netdev_close,
2352 .ndo_start_xmit = nfp_net_tx,
2353 .ndo_get_stats64 = nfp_net_stat64,
2354 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2355 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2356 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2357 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2358 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2359 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2360 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2361 .ndo_get_vf_config = nfp_app_get_vf_config,
2362 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2363 .ndo_setup_tc = nfp_port_setup_tc,
2364 .ndo_tx_timeout = nfp_net_tx_timeout,
2365 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2366 .ndo_change_mtu = nfp_net_change_mtu,
2367 .ndo_set_mac_address = nfp_net_set_mac_address,
2368 .ndo_set_features = nfp_net_set_features,
2369 .ndo_fix_features = nfp_net_fix_features,
2370 .ndo_features_check = nfp_net_features_check,
2371 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2372 .ndo_bpf = nfp_net_xdp,
2373 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2374 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2375 };
2376
nfp_udp_tunnel_sync(struct net_device * netdev,unsigned int table)2377 static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
2378 {
2379 struct nfp_net *nn = netdev_priv(netdev);
2380 int i;
2381
2382 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
2383 for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
2384 struct udp_tunnel_info ti0, ti1;
2385
2386 udp_tunnel_nic_get_port(netdev, table, i, &ti0);
2387 udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
2388
2389 nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
2390 be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
2391 }
2392
2393 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
2394 }
2395
2396 static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
2397 .sync_table = nfp_udp_tunnel_sync,
2398 .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP |
2399 UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
2400 .tables = {
2401 {
2402 .n_entries = NFP_NET_N_VXLAN_PORTS,
2403 .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
2404 },
2405 },
2406 };
2407
2408 /**
2409 * nfp_net_info() - Print general info about the NIC
2410 * @nn: NFP Net device to reconfigure
2411 */
nfp_net_info(struct nfp_net * nn)2412 void nfp_net_info(struct nfp_net *nn)
2413 {
2414 nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
2415 nn->dp.is_vf ? "VF " : "",
2416 nn->dp.num_tx_rings, nn->max_tx_rings,
2417 nn->dp.num_rx_rings, nn->max_rx_rings);
2418 nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
2419 nn->fw_ver.extend, nn->fw_ver.class,
2420 nn->fw_ver.major, nn->fw_ver.minor,
2421 nn->max_mtu);
2422 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",
2423 nn->cap,
2424 nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
2425 nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
2426 nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
2427 nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
2428 nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
2429 nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
2430 nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
2431 nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "",
2432 nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "",
2433 nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "",
2434 nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
2435 nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
2436 nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "",
2437 nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
2438 nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
2439 nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
2440 nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
2441 nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
2442 nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
2443 nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "",
2444 nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "",
2445 nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
2446 nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "",
2447 nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
2448 "RXCSUM_COMPLETE " : "",
2449 nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
2450 nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER ? "MULTICAST_FILTER " : "",
2451 nn->cap_w1 & NFP_NET_CFG_CTRL_USO ? "USO " : "",
2452 nfp_app_extra_cap(nn->app, nn));
2453 }
2454
2455 /**
2456 * nfp_net_alloc() - Allocate netdev and related structure
2457 * @pdev: PCI device
2458 * @dev_info: NFP ASIC params
2459 * @ctrl_bar: PCI IOMEM with vNIC config memory
2460 * @needs_netdev: Whether to allocate a netdev for this vNIC
2461 * @max_tx_rings: Maximum number of TX rings supported by device
2462 * @max_rx_rings: Maximum number of RX rings supported by device
2463 *
2464 * This function allocates a netdev device and fills in the initial
2465 * part of the @struct nfp_net structure. In case of control device
2466 * nfp_net structure is allocated without the netdev.
2467 *
2468 * Return: NFP Net device structure, or ERR_PTR on error.
2469 */
2470 struct nfp_net *
nfp_net_alloc(struct pci_dev * pdev,const struct nfp_dev_info * dev_info,void __iomem * ctrl_bar,bool needs_netdev,unsigned int max_tx_rings,unsigned int max_rx_rings)2471 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
2472 void __iomem *ctrl_bar, bool needs_netdev,
2473 unsigned int max_tx_rings, unsigned int max_rx_rings)
2474 {
2475 u64 dma_mask = dma_get_mask(&pdev->dev);
2476 struct nfp_net *nn;
2477 int err;
2478
2479 if (needs_netdev) {
2480 struct net_device *netdev;
2481
2482 netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
2483 max_tx_rings, max_rx_rings);
2484 if (!netdev)
2485 return ERR_PTR(-ENOMEM);
2486
2487 SET_NETDEV_DEV(netdev, &pdev->dev);
2488 nn = netdev_priv(netdev);
2489 nn->dp.netdev = netdev;
2490 } else {
2491 nn = vzalloc(sizeof(*nn));
2492 if (!nn)
2493 return ERR_PTR(-ENOMEM);
2494 }
2495
2496 nn->dp.dev = &pdev->dev;
2497 nn->dp.ctrl_bar = ctrl_bar;
2498 nn->dev_info = dev_info;
2499 nn->pdev = pdev;
2500 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
2501
2502 switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) {
2503 case NFP_NET_CFG_VERSION_DP_NFD3:
2504 nn->dp.ops = &nfp_nfd3_ops;
2505 break;
2506 case NFP_NET_CFG_VERSION_DP_NFDK:
2507 if (nn->fw_ver.major < 5) {
2508 dev_err(&pdev->dev,
2509 "NFDK must use ABI 5 or newer, found: %d\n",
2510 nn->fw_ver.major);
2511 err = -EINVAL;
2512 goto err_free_nn;
2513 }
2514 nn->dp.ops = &nfp_nfdk_ops;
2515 break;
2516 default:
2517 err = -EINVAL;
2518 goto err_free_nn;
2519 }
2520
2521 if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) {
2522 dev_err(&pdev->dev,
2523 "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n",
2524 nn->dp.ops->dma_mask, dma_mask);
2525 err = -EINVAL;
2526 goto err_free_nn;
2527 }
2528
2529 nn->max_tx_rings = max_tx_rings;
2530 nn->max_rx_rings = max_rx_rings;
2531
2532 nn->dp.num_tx_rings = min_t(unsigned int,
2533 max_tx_rings, num_online_cpus());
2534 nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
2535 netif_get_num_default_rss_queues());
2536
2537 nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
2538 nn->dp.num_r_vecs = min_t(unsigned int,
2539 nn->dp.num_r_vecs, num_online_cpus());
2540 nn->max_r_vecs = nn->dp.num_r_vecs;
2541
2542 nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools),
2543 GFP_KERNEL);
2544 if (!nn->dp.xsk_pools) {
2545 err = -ENOMEM;
2546 goto err_free_nn;
2547 }
2548
2549 nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
2550 nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
2551
2552 sema_init(&nn->bar_lock, 1);
2553
2554 spin_lock_init(&nn->reconfig_lock);
2555 spin_lock_init(&nn->link_status_lock);
2556
2557 timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
2558
2559 err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
2560 &nn->tlv_caps);
2561 if (err)
2562 goto err_free_nn;
2563
2564 err = nfp_ccm_mbox_alloc(nn);
2565 if (err)
2566 goto err_free_nn;
2567
2568 return nn;
2569
2570 err_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 */
nfp_net_free(struct nfp_net * nn)2582 void 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 */
nfp_net_rss_key_sz(struct nfp_net * nn)2600 unsigned 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 */
nfp_net_rss_init(struct nfp_net * nn)2619 static 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 */
nfp_net_irqmod_init(struct nfp_net * nn)2656 static 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
nfp_net_netdev_init(struct nfp_net * nn)2667 static 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 = msecs_to_jiffies(5 * 1000);
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
nfp_net_read_caps(struct nfp_net * nn)2796 static 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 */
nfp_net_init(struct nfp_net * nn)2847 int 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
2933 err_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 */
nfp_net_clean(struct nfp_net * nn)2942 void 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 }
2954