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/msi.h>
31 #include <linux/ethtool.h>
32 #include <linux/log2.h>
33 #include <linux/if_vlan.h>
34 #include <linux/if_bridge.h>
35 #include <linux/random.h>
36 #include <linux/vmalloc.h>
37 #include <linux/ktime.h>
38
39 #include <net/tls.h>
40 #include <net/vxlan.h>
41 #include <net/xdp_sock_drv.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 /**
57 * nfp_net_get_fw_version() - Read and parse the FW version
58 * @fw_ver: Output fw_version structure to read to
59 * @ctrl_bar: Mapped address of the control BAR
60 */
nfp_net_get_fw_version(struct nfp_net_fw_version * fw_ver,void __iomem * ctrl_bar)61 void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
62 void __iomem *ctrl_bar)
63 {
64 u32 reg;
65
66 reg = readl(ctrl_bar + NFP_NET_CFG_VERSION);
67 put_unaligned_le32(reg, fw_ver);
68 }
69
nfp_qcp_queue_offset(const struct nfp_dev_info * dev_info,u16 queue)70 u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue)
71 {
72 queue &= dev_info->qc_idx_mask;
73 return dev_info->qc_addr_offset + NFP_QCP_QUEUE_ADDR_SZ * queue;
74 }
75
76 /* Firmware reconfig
77 *
78 * Firmware reconfig may take a while so we have two versions of it -
79 * synchronous and asynchronous (posted). All synchronous callers are holding
80 * RTNL so we don't have to worry about serializing them.
81 */
nfp_net_reconfig_start(struct nfp_net * nn,u32 update)82 static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update)
83 {
84 nn_writel(nn, NFP_NET_CFG_UPDATE, update);
85 /* ensure update is written before pinging HW */
86 nn_pci_flush(nn);
87 nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1);
88 nn->reconfig_in_progress_update = update;
89 }
90
91 /* Pass 0 as update to run posted reconfigs. */
nfp_net_reconfig_start_async(struct nfp_net * nn,u32 update)92 static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update)
93 {
94 update |= nn->reconfig_posted;
95 nn->reconfig_posted = 0;
96
97 nfp_net_reconfig_start(nn, update);
98
99 nn->reconfig_timer_active = true;
100 mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ);
101 }
102
nfp_net_reconfig_check_done(struct nfp_net * nn,bool last_check)103 static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check)
104 {
105 u32 reg;
106
107 reg = nn_readl(nn, NFP_NET_CFG_UPDATE);
108 if (reg == 0)
109 return true;
110 if (reg & NFP_NET_CFG_UPDATE_ERR) {
111 nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
112 reg, nn->reconfig_in_progress_update,
113 nn_readl(nn, NFP_NET_CFG_CTRL));
114 return true;
115 } else if (last_check) {
116 nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n",
117 reg, nn->reconfig_in_progress_update,
118 nn_readl(nn, NFP_NET_CFG_CTRL));
119 return true;
120 }
121
122 return false;
123 }
124
__nfp_net_reconfig_wait(struct nfp_net * nn,unsigned long deadline)125 static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
126 {
127 bool timed_out = false;
128 int i;
129
130 /* Poll update field, waiting for NFP to ack the config.
131 * Do an opportunistic wait-busy loop, afterward sleep.
132 */
133 for (i = 0; i < 50; i++) {
134 if (nfp_net_reconfig_check_done(nn, false))
135 return false;
136 udelay(4);
137 }
138
139 while (!nfp_net_reconfig_check_done(nn, timed_out)) {
140 usleep_range(250, 500);
141 timed_out = time_is_before_eq_jiffies(deadline);
142 }
143
144 return timed_out;
145 }
146
nfp_net_reconfig_wait(struct nfp_net * nn,unsigned long deadline)147 static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
148 {
149 if (__nfp_net_reconfig_wait(nn, deadline))
150 return -EIO;
151
152 if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR)
153 return -EIO;
154
155 return 0;
156 }
157
nfp_net_reconfig_timer(struct timer_list * t)158 static void nfp_net_reconfig_timer(struct timer_list *t)
159 {
160 struct nfp_net *nn = from_timer(nn, t, reconfig_timer);
161
162 spin_lock_bh(&nn->reconfig_lock);
163
164 nn->reconfig_timer_active = false;
165
166 /* If sync caller is present it will take over from us */
167 if (nn->reconfig_sync_present)
168 goto done;
169
170 /* Read reconfig status and report errors */
171 nfp_net_reconfig_check_done(nn, true);
172
173 if (nn->reconfig_posted)
174 nfp_net_reconfig_start_async(nn, 0);
175 done:
176 spin_unlock_bh(&nn->reconfig_lock);
177 }
178
179 /**
180 * nfp_net_reconfig_post() - Post async reconfig request
181 * @nn: NFP Net device to reconfigure
182 * @update: The value for the update field in the BAR config
183 *
184 * Record FW reconfiguration request. Reconfiguration will be kicked off
185 * whenever reconfiguration machinery is idle. Multiple requests can be
186 * merged together!
187 */
nfp_net_reconfig_post(struct nfp_net * nn,u32 update)188 static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update)
189 {
190 spin_lock_bh(&nn->reconfig_lock);
191
192 /* Sync caller will kick off async reconf when it's done, just post */
193 if (nn->reconfig_sync_present) {
194 nn->reconfig_posted |= update;
195 goto done;
196 }
197
198 /* Opportunistically check if the previous command is done */
199 if (!nn->reconfig_timer_active ||
200 nfp_net_reconfig_check_done(nn, false))
201 nfp_net_reconfig_start_async(nn, update);
202 else
203 nn->reconfig_posted |= update;
204 done:
205 spin_unlock_bh(&nn->reconfig_lock);
206 }
207
nfp_net_reconfig_sync_enter(struct nfp_net * nn)208 static void nfp_net_reconfig_sync_enter(struct nfp_net *nn)
209 {
210 bool cancelled_timer = false;
211 u32 pre_posted_requests;
212
213 spin_lock_bh(&nn->reconfig_lock);
214
215 WARN_ON(nn->reconfig_sync_present);
216 nn->reconfig_sync_present = true;
217
218 if (nn->reconfig_timer_active) {
219 nn->reconfig_timer_active = false;
220 cancelled_timer = true;
221 }
222 pre_posted_requests = nn->reconfig_posted;
223 nn->reconfig_posted = 0;
224
225 spin_unlock_bh(&nn->reconfig_lock);
226
227 if (cancelled_timer) {
228 del_timer_sync(&nn->reconfig_timer);
229 nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires);
230 }
231
232 /* Run the posted reconfigs which were issued before we started */
233 if (pre_posted_requests) {
234 nfp_net_reconfig_start(nn, pre_posted_requests);
235 nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
236 }
237 }
238
nfp_net_reconfig_wait_posted(struct nfp_net * nn)239 static void nfp_net_reconfig_wait_posted(struct nfp_net *nn)
240 {
241 nfp_net_reconfig_sync_enter(nn);
242
243 spin_lock_bh(&nn->reconfig_lock);
244 nn->reconfig_sync_present = false;
245 spin_unlock_bh(&nn->reconfig_lock);
246 }
247
248 /**
249 * __nfp_net_reconfig() - Reconfigure the firmware
250 * @nn: NFP Net device to reconfigure
251 * @update: The value for the update field in the BAR config
252 *
253 * Write the update word to the BAR and ping the reconfig queue. The
254 * poll until the firmware has acknowledged the update by zeroing the
255 * update word.
256 *
257 * Return: Negative errno on error, 0 on success
258 */
__nfp_net_reconfig(struct nfp_net * nn,u32 update)259 int __nfp_net_reconfig(struct nfp_net *nn, u32 update)
260 {
261 int ret;
262
263 nfp_net_reconfig_sync_enter(nn);
264
265 nfp_net_reconfig_start(nn, update);
266 ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
267
268 spin_lock_bh(&nn->reconfig_lock);
269
270 if (nn->reconfig_posted)
271 nfp_net_reconfig_start_async(nn, 0);
272
273 nn->reconfig_sync_present = false;
274
275 spin_unlock_bh(&nn->reconfig_lock);
276
277 return ret;
278 }
279
nfp_net_reconfig(struct nfp_net * nn,u32 update)280 int nfp_net_reconfig(struct nfp_net *nn, u32 update)
281 {
282 int ret;
283
284 nn_ctrl_bar_lock(nn);
285 ret = __nfp_net_reconfig(nn, update);
286 nn_ctrl_bar_unlock(nn);
287
288 return ret;
289 }
290
nfp_net_mbox_lock(struct nfp_net * nn,unsigned int data_size)291 int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size)
292 {
293 if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) {
294 nn_err(nn, "mailbox too small for %u of data (%u)\n",
295 data_size, nn->tlv_caps.mbox_len);
296 return -EIO;
297 }
298
299 nn_ctrl_bar_lock(nn);
300 return 0;
301 }
302
303 /**
304 * nfp_net_mbox_reconfig() - Reconfigure the firmware via the mailbox
305 * @nn: NFP Net device to reconfigure
306 * @mbox_cmd: The value for the mailbox command
307 *
308 * Helper function for mailbox updates
309 *
310 * Return: Negative errno on error, 0 on success
311 */
nfp_net_mbox_reconfig(struct nfp_net * nn,u32 mbox_cmd)312 int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd)
313 {
314 u32 mbox = nn->tlv_caps.mbox_off;
315 int ret;
316
317 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
318
319 ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
320 if (ret) {
321 nn_err(nn, "Mailbox update error\n");
322 return ret;
323 }
324
325 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
326 }
327
nfp_net_mbox_reconfig_post(struct nfp_net * nn,u32 mbox_cmd)328 void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd)
329 {
330 u32 mbox = nn->tlv_caps.mbox_off;
331
332 nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);
333
334 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX);
335 }
336
nfp_net_mbox_reconfig_wait_posted(struct nfp_net * nn)337 int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn)
338 {
339 u32 mbox = nn->tlv_caps.mbox_off;
340
341 nfp_net_reconfig_wait_posted(nn);
342
343 return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
344 }
345
nfp_net_mbox_reconfig_and_unlock(struct nfp_net * nn,u32 mbox_cmd)346 int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd)
347 {
348 int ret;
349
350 ret = nfp_net_mbox_reconfig(nn, mbox_cmd);
351 nn_ctrl_bar_unlock(nn);
352 return ret;
353 }
354
355 /* Interrupt configuration and handling
356 */
357
358 /**
359 * nfp_net_irqs_alloc() - allocates MSI-X irqs
360 * @pdev: PCI device structure
361 * @irq_entries: Array to be initialized and used to hold the irq entries
362 * @min_irqs: Minimal acceptable number of interrupts
363 * @wanted_irqs: Target number of interrupts to allocate
364 *
365 * Return: Number of irqs obtained or 0 on error.
366 */
367 unsigned int
nfp_net_irqs_alloc(struct pci_dev * pdev,struct msix_entry * irq_entries,unsigned int min_irqs,unsigned int wanted_irqs)368 nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
369 unsigned int min_irqs, unsigned int wanted_irqs)
370 {
371 unsigned int i;
372 int got_irqs;
373
374 for (i = 0; i < wanted_irqs; i++)
375 irq_entries[i].entry = i;
376
377 got_irqs = pci_enable_msix_range(pdev, irq_entries,
378 min_irqs, wanted_irqs);
379 if (got_irqs < 0) {
380 dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
381 min_irqs, wanted_irqs, got_irqs);
382 return 0;
383 }
384
385 if (got_irqs < wanted_irqs)
386 dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
387 wanted_irqs, got_irqs);
388
389 return got_irqs;
390 }
391
392 /**
393 * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
394 * @nn: NFP Network structure
395 * @irq_entries: Table of allocated interrupts
396 * @n: Size of @irq_entries (number of entries to grab)
397 *
398 * After interrupts are allocated with nfp_net_irqs_alloc() this function
399 * should be called to assign them to a specific netdev (port).
400 */
401 void
nfp_net_irqs_assign(struct nfp_net * nn,struct msix_entry * irq_entries,unsigned int n)402 nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
403 unsigned int n)
404 {
405 struct nfp_net_dp *dp = &nn->dp;
406
407 nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
408 dp->num_r_vecs = nn->max_r_vecs;
409
410 memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
411
412 if (dp->num_rx_rings > dp->num_r_vecs ||
413 dp->num_tx_rings > dp->num_r_vecs)
414 dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n",
415 dp->num_rx_rings, dp->num_tx_rings,
416 dp->num_r_vecs);
417
418 dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings);
419 dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings);
420 dp->num_stack_tx_rings = dp->num_tx_rings;
421 }
422
423 /**
424 * nfp_net_irqs_disable() - Disable interrupts
425 * @pdev: PCI device structure
426 *
427 * Undoes what @nfp_net_irqs_alloc() does.
428 */
nfp_net_irqs_disable(struct pci_dev * pdev)429 void nfp_net_irqs_disable(struct pci_dev *pdev)
430 {
431 pci_disable_msix(pdev);
432 }
433
434 /**
435 * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
436 * @irq: Interrupt
437 * @data: Opaque data structure
438 *
439 * Return: Indicate if the interrupt has been handled.
440 */
nfp_net_irq_rxtx(int irq,void * data)441 static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
442 {
443 struct nfp_net_r_vector *r_vec = data;
444
445 /* Currently we cannot tell if it's a rx or tx interrupt,
446 * since dim does not need accurate event_ctr to calculate,
447 * we just use this counter for both rx and tx dim.
448 */
449 r_vec->event_ctr++;
450
451 napi_schedule_irqoff(&r_vec->napi);
452
453 /* The FW auto-masks any interrupt, either via the MASK bit in
454 * the MSI-X table or via the per entry ICR field. So there
455 * is no need to disable interrupts here.
456 */
457 return IRQ_HANDLED;
458 }
459
nfp_ctrl_irq_rxtx(int irq,void * data)460 static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data)
461 {
462 struct nfp_net_r_vector *r_vec = data;
463
464 tasklet_schedule(&r_vec->tasklet);
465
466 return IRQ_HANDLED;
467 }
468
469 /**
470 * nfp_net_read_link_status() - Reread link status from control BAR
471 * @nn: NFP Network structure
472 */
nfp_net_read_link_status(struct nfp_net * nn)473 static void nfp_net_read_link_status(struct nfp_net *nn)
474 {
475 unsigned long flags;
476 bool link_up;
477 u16 sts;
478
479 spin_lock_irqsave(&nn->link_status_lock, flags);
480
481 sts = nn_readw(nn, NFP_NET_CFG_STS);
482 link_up = !!(sts & NFP_NET_CFG_STS_LINK);
483
484 if (nn->link_up == link_up)
485 goto out;
486
487 nn->link_up = link_up;
488 if (nn->port) {
489 set_bit(NFP_PORT_CHANGED, &nn->port->flags);
490 if (nn->port->link_cb)
491 nn->port->link_cb(nn->port);
492 }
493
494 if (nn->link_up) {
495 netif_carrier_on(nn->dp.netdev);
496 netdev_info(nn->dp.netdev, "NIC Link is Up\n");
497 } else {
498 netif_carrier_off(nn->dp.netdev);
499 netdev_info(nn->dp.netdev, "NIC Link is Down\n");
500 }
501 out:
502 spin_unlock_irqrestore(&nn->link_status_lock, flags);
503 }
504
505 /**
506 * nfp_net_irq_lsc() - Interrupt service routine for link state changes
507 * @irq: Interrupt
508 * @data: Opaque data structure
509 *
510 * Return: Indicate if the interrupt has been handled.
511 */
nfp_net_irq_lsc(int irq,void * data)512 static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
513 {
514 struct nfp_net *nn = data;
515 struct msix_entry *entry;
516
517 entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
518
519 nfp_net_read_link_status(nn);
520
521 nfp_net_irq_unmask(nn, entry->entry);
522
523 return IRQ_HANDLED;
524 }
525
526 /**
527 * nfp_net_irq_exn() - Interrupt service routine for exceptions
528 * @irq: Interrupt
529 * @data: Opaque data structure
530 *
531 * Return: Indicate if the interrupt has been handled.
532 */
nfp_net_irq_exn(int irq,void * data)533 static irqreturn_t nfp_net_irq_exn(int irq, void *data)
534 {
535 struct nfp_net *nn = data;
536
537 nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
538 /* XXX TO BE IMPLEMENTED */
539 return IRQ_HANDLED;
540 }
541
542 /**
543 * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN)
544 * @nn: NFP Network structure
545 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
546 * @format: printf-style format to construct the interrupt name
547 * @name: Pointer to allocated space for interrupt name
548 * @name_sz: Size of space for interrupt name
549 * @vector_idx: Index of MSI-X vector used for this interrupt
550 * @handler: IRQ handler to register for this interrupt
551 */
552 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)553 nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset,
554 const char *format, char *name, size_t name_sz,
555 unsigned int vector_idx, irq_handler_t handler)
556 {
557 struct msix_entry *entry;
558 int err;
559
560 entry = &nn->irq_entries[vector_idx];
561
562 snprintf(name, name_sz, format, nfp_net_name(nn));
563 err = request_irq(entry->vector, handler, 0, name, nn);
564 if (err) {
565 nn_err(nn, "Failed to request IRQ %d (err=%d).\n",
566 entry->vector, err);
567 return err;
568 }
569 nn_writeb(nn, ctrl_offset, entry->entry);
570 nfp_net_irq_unmask(nn, entry->entry);
571
572 return 0;
573 }
574
575 /**
576 * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN)
577 * @nn: NFP Network structure
578 * @ctrl_offset: Control BAR offset where IRQ configuration should be written
579 * @vector_idx: Index of MSI-X vector used for this interrupt
580 */
nfp_net_aux_irq_free(struct nfp_net * nn,u32 ctrl_offset,unsigned int vector_idx)581 static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset,
582 unsigned int vector_idx)
583 {
584 nn_writeb(nn, ctrl_offset, 0xff);
585 nn_pci_flush(nn);
586 free_irq(nn->irq_entries[vector_idx].vector, nn);
587 }
588
589 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)590 nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
591 struct sk_buff *skb, u64 *tls_handle, int *nr_frags)
592 {
593 #ifdef CONFIG_TLS_DEVICE
594 struct nfp_net_tls_offload_ctx *ntls;
595 struct sk_buff *nskb;
596 bool resync_pending;
597 u32 datalen, seq;
598
599 if (likely(!dp->ktls_tx))
600 return skb;
601 if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))
602 return skb;
603
604 datalen = skb->len - skb_tcp_all_headers(skb);
605 seq = ntohl(tcp_hdr(skb)->seq);
606 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
607 resync_pending = tls_offload_tx_resync_pending(skb->sk);
608 if (unlikely(resync_pending || ntls->next_seq != seq)) {
609 /* Pure ACK out of order already */
610 if (!datalen)
611 return skb;
612
613 u64_stats_update_begin(&r_vec->tx_sync);
614 r_vec->tls_tx_fallback++;
615 u64_stats_update_end(&r_vec->tx_sync);
616
617 nskb = tls_encrypt_skb(skb);
618 if (!nskb) {
619 u64_stats_update_begin(&r_vec->tx_sync);
620 r_vec->tls_tx_no_fallback++;
621 u64_stats_update_end(&r_vec->tx_sync);
622 return NULL;
623 }
624 /* encryption wasn't necessary */
625 if (nskb == skb)
626 return skb;
627 /* we don't re-check ring space */
628 if (unlikely(skb_is_nonlinear(nskb))) {
629 nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n");
630 u64_stats_update_begin(&r_vec->tx_sync);
631 r_vec->tx_errors++;
632 u64_stats_update_end(&r_vec->tx_sync);
633 dev_kfree_skb_any(nskb);
634 return NULL;
635 }
636
637 /* jump forward, a TX may have gotten lost, need to sync TX */
638 if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4)
639 tls_offload_tx_resync_request(nskb->sk, seq,
640 ntls->next_seq);
641
642 *nr_frags = 0;
643 return nskb;
644 }
645
646 if (datalen) {
647 u64_stats_update_begin(&r_vec->tx_sync);
648 if (!skb_is_gso(skb))
649 r_vec->hw_tls_tx++;
650 else
651 r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs;
652 u64_stats_update_end(&r_vec->tx_sync);
653 }
654
655 memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle));
656 ntls->next_seq += datalen;
657 #endif
658 return skb;
659 }
660
nfp_net_tls_tx_undo(struct sk_buff * skb,u64 tls_handle)661 void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle)
662 {
663 #ifdef CONFIG_TLS_DEVICE
664 struct nfp_net_tls_offload_ctx *ntls;
665 u32 datalen, seq;
666
667 if (!tls_handle)
668 return;
669 if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)))
670 return;
671
672 datalen = skb->len - skb_tcp_all_headers(skb);
673 seq = ntohl(tcp_hdr(skb)->seq);
674
675 ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX);
676 if (ntls->next_seq == seq + datalen)
677 ntls->next_seq = seq;
678 else
679 WARN_ON_ONCE(1);
680 #endif
681 }
682
nfp_net_tx_timeout(struct net_device * netdev,unsigned int txqueue)683 static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
684 {
685 struct nfp_net *nn = netdev_priv(netdev);
686
687 nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue);
688 }
689
690 /* Receive processing */
691 static unsigned int
nfp_net_calc_fl_bufsz_data(struct nfp_net_dp * dp)692 nfp_net_calc_fl_bufsz_data(struct nfp_net_dp *dp)
693 {
694 unsigned int fl_bufsz = 0;
695
696 if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
697 fl_bufsz += NFP_NET_MAX_PREPEND;
698 else
699 fl_bufsz += dp->rx_offset;
700 fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu;
701
702 return fl_bufsz;
703 }
704
nfp_net_calc_fl_bufsz(struct nfp_net_dp * dp)705 static unsigned int nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp)
706 {
707 unsigned int fl_bufsz;
708
709 fl_bufsz = NFP_NET_RX_BUF_HEADROOM;
710 fl_bufsz += dp->rx_dma_off;
711 fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
712
713 fl_bufsz = SKB_DATA_ALIGN(fl_bufsz);
714 fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
715
716 return fl_bufsz;
717 }
718
nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp * dp)719 static unsigned int nfp_net_calc_fl_bufsz_xsk(struct nfp_net_dp *dp)
720 {
721 unsigned int fl_bufsz;
722
723 fl_bufsz = XDP_PACKET_HEADROOM;
724 fl_bufsz += nfp_net_calc_fl_bufsz_data(dp);
725
726 return fl_bufsz;
727 }
728
729 /* Setup and Configuration
730 */
731
732 /**
733 * nfp_net_vecs_init() - Assign IRQs and setup rvecs.
734 * @nn: NFP Network structure
735 */
nfp_net_vecs_init(struct nfp_net * nn)736 static void nfp_net_vecs_init(struct nfp_net *nn)
737 {
738 struct nfp_net_r_vector *r_vec;
739 int r;
740
741 nn->lsc_handler = nfp_net_irq_lsc;
742 nn->exn_handler = nfp_net_irq_exn;
743
744 for (r = 0; r < nn->max_r_vecs; r++) {
745 struct msix_entry *entry;
746
747 entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
748
749 r_vec = &nn->r_vecs[r];
750 r_vec->nfp_net = nn;
751 r_vec->irq_entry = entry->entry;
752 r_vec->irq_vector = entry->vector;
753
754 if (nn->dp.netdev) {
755 r_vec->handler = nfp_net_irq_rxtx;
756 } else {
757 r_vec->handler = nfp_ctrl_irq_rxtx;
758
759 __skb_queue_head_init(&r_vec->queue);
760 spin_lock_init(&r_vec->lock);
761 tasklet_setup(&r_vec->tasklet, nn->dp.ops->ctrl_poll);
762 tasklet_disable(&r_vec->tasklet);
763 }
764
765 cpumask_set_cpu(r, &r_vec->affinity_mask);
766 }
767 }
768
769 static void
nfp_net_napi_add(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec,int idx)770 nfp_net_napi_add(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, int idx)
771 {
772 if (dp->netdev)
773 netif_napi_add(dp->netdev, &r_vec->napi,
774 nfp_net_has_xsk_pool_slow(dp, idx) ? dp->ops->xsk_poll : dp->ops->poll);
775 else
776 tasklet_enable(&r_vec->tasklet);
777 }
778
779 static void
nfp_net_napi_del(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec)780 nfp_net_napi_del(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec)
781 {
782 if (dp->netdev)
783 netif_napi_del(&r_vec->napi);
784 else
785 tasklet_disable(&r_vec->tasklet);
786 }
787
788 static void
nfp_net_vector_assign_rings(struct nfp_net_dp * dp,struct nfp_net_r_vector * r_vec,int idx)789 nfp_net_vector_assign_rings(struct nfp_net_dp *dp,
790 struct nfp_net_r_vector *r_vec, int idx)
791 {
792 r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL;
793 r_vec->tx_ring =
794 idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL;
795
796 r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ?
797 &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL;
798
799 if (nfp_net_has_xsk_pool_slow(dp, idx) || r_vec->xsk_pool) {
800 r_vec->xsk_pool = dp->xdp_prog ? dp->xsk_pools[idx] : NULL;
801
802 if (r_vec->xsk_pool)
803 xsk_pool_set_rxq_info(r_vec->xsk_pool,
804 &r_vec->rx_ring->xdp_rxq);
805
806 nfp_net_napi_del(dp, r_vec);
807 nfp_net_napi_add(dp, r_vec, idx);
808 }
809 }
810
811 static int
nfp_net_prepare_vector(struct nfp_net * nn,struct nfp_net_r_vector * r_vec,int idx)812 nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
813 int idx)
814 {
815 int err;
816
817 nfp_net_napi_add(&nn->dp, r_vec, idx);
818
819 snprintf(r_vec->name, sizeof(r_vec->name),
820 "%s-rxtx-%d", nfp_net_name(nn), idx);
821 err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
822 r_vec);
823 if (err) {
824 nfp_net_napi_del(&nn->dp, r_vec);
825 nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
826 return err;
827 }
828 disable_irq(r_vec->irq_vector);
829
830 irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
831
832 nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
833 r_vec->irq_entry);
834
835 return 0;
836 }
837
838 static void
nfp_net_cleanup_vector(struct nfp_net * nn,struct nfp_net_r_vector * r_vec)839 nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
840 {
841 irq_set_affinity_hint(r_vec->irq_vector, NULL);
842 nfp_net_napi_del(&nn->dp, r_vec);
843 free_irq(r_vec->irq_vector, r_vec);
844 }
845
846 /**
847 * nfp_net_rss_write_itbl() - Write RSS indirection table to device
848 * @nn: NFP Net device to reconfigure
849 */
nfp_net_rss_write_itbl(struct nfp_net * nn)850 void nfp_net_rss_write_itbl(struct nfp_net *nn)
851 {
852 int i;
853
854 for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
855 nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
856 get_unaligned_le32(nn->rss_itbl + i));
857 }
858
859 /**
860 * nfp_net_rss_write_key() - Write RSS hash key to device
861 * @nn: NFP Net device to reconfigure
862 */
nfp_net_rss_write_key(struct nfp_net * nn)863 void nfp_net_rss_write_key(struct nfp_net *nn)
864 {
865 int i;
866
867 for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4)
868 nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
869 get_unaligned_le32(nn->rss_key + i));
870 }
871
872 /**
873 * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
874 * @nn: NFP Net device to reconfigure
875 */
nfp_net_coalesce_write_cfg(struct nfp_net * nn)876 void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
877 {
878 u8 i;
879 u32 factor;
880 u32 value;
881
882 /* Compute factor used to convert coalesce '_usecs' parameters to
883 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
884 * count.
885 */
886 factor = nn->tlv_caps.me_freq_mhz / 16;
887
888 /* copy RX interrupt coalesce parameters */
889 value = (nn->rx_coalesce_max_frames << 16) |
890 (factor * nn->rx_coalesce_usecs);
891 for (i = 0; i < nn->dp.num_rx_rings; i++)
892 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
893
894 /* copy TX interrupt coalesce parameters */
895 value = (nn->tx_coalesce_max_frames << 16) |
896 (factor * nn->tx_coalesce_usecs);
897 for (i = 0; i < nn->dp.num_tx_rings; i++)
898 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
899 }
900
901 /**
902 * nfp_net_write_mac_addr() - Write mac address to the device control BAR
903 * @nn: NFP Net device to reconfigure
904 * @addr: MAC address to write
905 *
906 * Writes the MAC address from the netdev to the device control BAR. Does not
907 * perform the required reconfig. We do a bit of byte swapping dance because
908 * firmware is LE.
909 */
nfp_net_write_mac_addr(struct nfp_net * nn,const u8 * addr)910 static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr)
911 {
912 nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
913 nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
914 }
915
916 /**
917 * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
918 * @nn: NFP Net device to reconfigure
919 *
920 * Warning: must be fully idempotent.
921 */
nfp_net_clear_config_and_disable(struct nfp_net * nn)922 static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
923 {
924 u32 new_ctrl, update;
925 unsigned int r;
926 int err;
927
928 new_ctrl = nn->dp.ctrl;
929 new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
930 update = NFP_NET_CFG_UPDATE_GEN;
931 update |= NFP_NET_CFG_UPDATE_MSIX;
932 update |= NFP_NET_CFG_UPDATE_RING;
933
934 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
935 new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
936
937 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
938 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
939
940 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
941 err = nfp_net_reconfig(nn, update);
942 if (err)
943 nn_err(nn, "Could not disable device: %d\n", err);
944
945 for (r = 0; r < nn->dp.num_rx_rings; r++) {
946 nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
947 if (nfp_net_has_xsk_pool_slow(&nn->dp, nn->dp.rx_rings[r].idx))
948 nfp_net_xsk_rx_bufs_free(&nn->dp.rx_rings[r]);
949 }
950 for (r = 0; r < nn->dp.num_tx_rings; r++)
951 nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
952 for (r = 0; r < nn->dp.num_r_vecs; r++)
953 nfp_net_vec_clear_ring_data(nn, r);
954
955 nn->dp.ctrl = new_ctrl;
956 }
957
958 /**
959 * nfp_net_set_config_and_enable() - Write control BAR and enable NFP
960 * @nn: NFP Net device to reconfigure
961 */
nfp_net_set_config_and_enable(struct nfp_net * nn)962 static int nfp_net_set_config_and_enable(struct nfp_net *nn)
963 {
964 u32 bufsz, new_ctrl, update = 0;
965 unsigned int r;
966 int err;
967
968 new_ctrl = nn->dp.ctrl;
969
970 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
971 nfp_net_rss_write_key(nn);
972 nfp_net_rss_write_itbl(nn);
973 nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
974 update |= NFP_NET_CFG_UPDATE_RSS;
975 }
976
977 if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
978 nfp_net_coalesce_write_cfg(nn);
979 update |= NFP_NET_CFG_UPDATE_IRQMOD;
980 }
981
982 for (r = 0; r < nn->dp.num_tx_rings; r++)
983 nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
984 for (r = 0; r < nn->dp.num_rx_rings; r++)
985 nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
986
987 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE,
988 U64_MAX >> (64 - nn->dp.num_tx_rings));
989
990 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE,
991 U64_MAX >> (64 - nn->dp.num_rx_rings));
992
993 if (nn->dp.netdev)
994 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
995
996 nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
997
998 bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
999 nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz);
1000
1001 /* Enable device */
1002 new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
1003 update |= NFP_NET_CFG_UPDATE_GEN;
1004 update |= NFP_NET_CFG_UPDATE_MSIX;
1005 update |= NFP_NET_CFG_UPDATE_RING;
1006 if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
1007 new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
1008
1009 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1010 err = nfp_net_reconfig(nn, update);
1011 if (err) {
1012 nfp_net_clear_config_and_disable(nn);
1013 return err;
1014 }
1015
1016 nn->dp.ctrl = new_ctrl;
1017
1018 for (r = 0; r < nn->dp.num_rx_rings; r++)
1019 nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
1020
1021 return 0;
1022 }
1023
1024 /**
1025 * nfp_net_close_stack() - Quiesce the stack (part of close)
1026 * @nn: NFP Net device to reconfigure
1027 */
nfp_net_close_stack(struct nfp_net * nn)1028 static void nfp_net_close_stack(struct nfp_net *nn)
1029 {
1030 struct nfp_net_r_vector *r_vec;
1031 unsigned int r;
1032
1033 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1034 netif_carrier_off(nn->dp.netdev);
1035 nn->link_up = false;
1036
1037 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1038 r_vec = &nn->r_vecs[r];
1039
1040 disable_irq(r_vec->irq_vector);
1041 napi_disable(&r_vec->napi);
1042
1043 if (r_vec->rx_ring)
1044 cancel_work_sync(&r_vec->rx_dim.work);
1045
1046 if (r_vec->tx_ring)
1047 cancel_work_sync(&r_vec->tx_dim.work);
1048 }
1049
1050 netif_tx_disable(nn->dp.netdev);
1051 }
1052
1053 /**
1054 * nfp_net_close_free_all() - Free all runtime resources
1055 * @nn: NFP Net device to reconfigure
1056 */
nfp_net_close_free_all(struct nfp_net * nn)1057 static void nfp_net_close_free_all(struct nfp_net *nn)
1058 {
1059 unsigned int r;
1060
1061 nfp_net_tx_rings_free(&nn->dp);
1062 nfp_net_rx_rings_free(&nn->dp);
1063
1064 for (r = 0; r < nn->dp.num_r_vecs; r++)
1065 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1066
1067 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1068 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1069 }
1070
1071 /**
1072 * nfp_net_netdev_close() - Called when the device is downed
1073 * @netdev: netdev structure
1074 */
nfp_net_netdev_close(struct net_device * netdev)1075 static int nfp_net_netdev_close(struct net_device *netdev)
1076 {
1077 struct nfp_net *nn = netdev_priv(netdev);
1078
1079 /* Step 1: Disable RX and TX rings from the Linux kernel perspective
1080 */
1081 nfp_net_close_stack(nn);
1082
1083 /* Step 2: Tell NFP
1084 */
1085 nfp_net_clear_config_and_disable(nn);
1086 nfp_port_configure(netdev, false);
1087
1088 /* Step 3: Free resources
1089 */
1090 nfp_net_close_free_all(nn);
1091
1092 nn_dbg(nn, "%s down", netdev->name);
1093 return 0;
1094 }
1095
nfp_ctrl_close(struct nfp_net * nn)1096 void nfp_ctrl_close(struct nfp_net *nn)
1097 {
1098 int r;
1099
1100 rtnl_lock();
1101
1102 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1103 disable_irq(nn->r_vecs[r].irq_vector);
1104 tasklet_disable(&nn->r_vecs[r].tasklet);
1105 }
1106
1107 nfp_net_clear_config_and_disable(nn);
1108
1109 nfp_net_close_free_all(nn);
1110
1111 rtnl_unlock();
1112 }
1113
nfp_net_rx_dim_work(struct work_struct * work)1114 static void nfp_net_rx_dim_work(struct work_struct *work)
1115 {
1116 struct nfp_net_r_vector *r_vec;
1117 unsigned int factor, value;
1118 struct dim_cq_moder moder;
1119 struct nfp_net *nn;
1120 struct dim *dim;
1121
1122 dim = container_of(work, struct dim, work);
1123 moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
1124 r_vec = container_of(dim, struct nfp_net_r_vector, rx_dim);
1125 nn = r_vec->nfp_net;
1126
1127 /* Compute factor used to convert coalesce '_usecs' parameters to
1128 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1129 * count.
1130 */
1131 factor = nn->tlv_caps.me_freq_mhz / 16;
1132 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
1133 return;
1134
1135 /* copy RX interrupt coalesce parameters */
1136 value = (moder.pkts << 16) | (factor * moder.usec);
1137 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
1138 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1139
1140 dim->state = DIM_START_MEASURE;
1141 }
1142
nfp_net_tx_dim_work(struct work_struct * work)1143 static void nfp_net_tx_dim_work(struct work_struct *work)
1144 {
1145 struct nfp_net_r_vector *r_vec;
1146 unsigned int factor, value;
1147 struct dim_cq_moder moder;
1148 struct nfp_net *nn;
1149 struct dim *dim;
1150
1151 dim = container_of(work, struct dim, work);
1152 moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
1153 r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
1154 nn = r_vec->nfp_net;
1155
1156 /* Compute factor used to convert coalesce '_usecs' parameters to
1157 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1158 * count.
1159 */
1160 factor = nn->tlv_caps.me_freq_mhz / 16;
1161 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
1162 return;
1163
1164 /* copy TX interrupt coalesce parameters */
1165 value = (moder.pkts << 16) | (factor * moder.usec);
1166 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
1167 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1168
1169 dim->state = DIM_START_MEASURE;
1170 }
1171
1172 /**
1173 * nfp_net_open_stack() - Start the device from stack's perspective
1174 * @nn: NFP Net device to reconfigure
1175 */
nfp_net_open_stack(struct nfp_net * nn)1176 static void nfp_net_open_stack(struct nfp_net *nn)
1177 {
1178 struct nfp_net_r_vector *r_vec;
1179 unsigned int r;
1180
1181 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1182 r_vec = &nn->r_vecs[r];
1183
1184 if (r_vec->rx_ring) {
1185 INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
1186 r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1187 }
1188
1189 if (r_vec->tx_ring) {
1190 INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
1191 r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1192 }
1193
1194 napi_enable(&r_vec->napi);
1195 enable_irq(r_vec->irq_vector);
1196 }
1197
1198 netif_tx_wake_all_queues(nn->dp.netdev);
1199
1200 enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1201 nfp_net_read_link_status(nn);
1202 }
1203
nfp_net_open_alloc_all(struct nfp_net * nn)1204 static int nfp_net_open_alloc_all(struct nfp_net *nn)
1205 {
1206 int err, r;
1207
1208 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
1209 nn->exn_name, sizeof(nn->exn_name),
1210 NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
1211 if (err)
1212 return err;
1213 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
1214 nn->lsc_name, sizeof(nn->lsc_name),
1215 NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
1216 if (err)
1217 goto err_free_exn;
1218 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1219
1220 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1221 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1222 if (err)
1223 goto err_cleanup_vec_p;
1224 }
1225
1226 err = nfp_net_rx_rings_prepare(nn, &nn->dp);
1227 if (err)
1228 goto err_cleanup_vec;
1229
1230 err = nfp_net_tx_rings_prepare(nn, &nn->dp);
1231 if (err)
1232 goto err_free_rx_rings;
1233
1234 for (r = 0; r < nn->max_r_vecs; r++)
1235 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1236
1237 return 0;
1238
1239 err_free_rx_rings:
1240 nfp_net_rx_rings_free(&nn->dp);
1241 err_cleanup_vec:
1242 r = nn->dp.num_r_vecs;
1243 err_cleanup_vec_p:
1244 while (r--)
1245 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1246 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1247 err_free_exn:
1248 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1249 return err;
1250 }
1251
nfp_net_netdev_open(struct net_device * netdev)1252 static int nfp_net_netdev_open(struct net_device *netdev)
1253 {
1254 struct nfp_net *nn = netdev_priv(netdev);
1255 int err;
1256
1257 /* Step 1: Allocate resources for rings and the like
1258 * - Request interrupts
1259 * - Allocate RX and TX ring resources
1260 * - Setup initial RSS table
1261 */
1262 err = nfp_net_open_alloc_all(nn);
1263 if (err)
1264 return err;
1265
1266 err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
1267 if (err)
1268 goto err_free_all;
1269
1270 err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
1271 if (err)
1272 goto err_free_all;
1273
1274 /* Step 2: Configure the NFP
1275 * - Ifup the physical interface if it exists
1276 * - Enable rings from 0 to tx_rings/rx_rings - 1.
1277 * - Write MAC address (in case it changed)
1278 * - Set the MTU
1279 * - Set the Freelist buffer size
1280 * - Enable the FW
1281 */
1282 err = nfp_port_configure(netdev, true);
1283 if (err)
1284 goto err_free_all;
1285
1286 err = nfp_net_set_config_and_enable(nn);
1287 if (err)
1288 goto err_port_disable;
1289
1290 /* Step 3: Enable for kernel
1291 * - put some freelist descriptors on each RX ring
1292 * - enable NAPI on each ring
1293 * - enable all TX queues
1294 * - set link state
1295 */
1296 nfp_net_open_stack(nn);
1297
1298 return 0;
1299
1300 err_port_disable:
1301 nfp_port_configure(netdev, false);
1302 err_free_all:
1303 nfp_net_close_free_all(nn);
1304 return err;
1305 }
1306
nfp_ctrl_open(struct nfp_net * nn)1307 int nfp_ctrl_open(struct nfp_net *nn)
1308 {
1309 int err, r;
1310
1311 /* ring dumping depends on vNICs being opened/closed under rtnl */
1312 rtnl_lock();
1313
1314 err = nfp_net_open_alloc_all(nn);
1315 if (err)
1316 goto err_unlock;
1317
1318 err = nfp_net_set_config_and_enable(nn);
1319 if (err)
1320 goto err_free_all;
1321
1322 for (r = 0; r < nn->dp.num_r_vecs; r++)
1323 enable_irq(nn->r_vecs[r].irq_vector);
1324
1325 rtnl_unlock();
1326
1327 return 0;
1328
1329 err_free_all:
1330 nfp_net_close_free_all(nn);
1331 err_unlock:
1332 rtnl_unlock();
1333 return err;
1334 }
1335
nfp_net_set_rx_mode(struct net_device * netdev)1336 static void nfp_net_set_rx_mode(struct net_device *netdev)
1337 {
1338 struct nfp_net *nn = netdev_priv(netdev);
1339 u32 new_ctrl;
1340
1341 new_ctrl = nn->dp.ctrl;
1342
1343 if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
1344 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
1345 else
1346 new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
1347
1348 if (netdev->flags & IFF_PROMISC) {
1349 if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
1350 new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
1351 else
1352 nn_warn(nn, "FW does not support promiscuous mode\n");
1353 } else {
1354 new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
1355 }
1356
1357 if (new_ctrl == nn->dp.ctrl)
1358 return;
1359
1360 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1361 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
1362
1363 nn->dp.ctrl = new_ctrl;
1364 }
1365
nfp_net_rss_init_itbl(struct nfp_net * nn)1366 static void nfp_net_rss_init_itbl(struct nfp_net *nn)
1367 {
1368 int i;
1369
1370 for (i = 0; i < sizeof(nn->rss_itbl); i++)
1371 nn->rss_itbl[i] =
1372 ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
1373 }
1374
nfp_net_dp_swap(struct nfp_net * nn,struct nfp_net_dp * dp)1375 static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
1376 {
1377 struct nfp_net_dp new_dp = *dp;
1378
1379 *dp = nn->dp;
1380 nn->dp = new_dp;
1381
1382 nn->dp.netdev->mtu = new_dp.mtu;
1383
1384 if (!netif_is_rxfh_configured(nn->dp.netdev))
1385 nfp_net_rss_init_itbl(nn);
1386 }
1387
nfp_net_dp_swap_enable(struct nfp_net * nn,struct nfp_net_dp * dp)1388 static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
1389 {
1390 unsigned int r;
1391 int err;
1392
1393 nfp_net_dp_swap(nn, dp);
1394
1395 for (r = 0; r < nn->max_r_vecs; r++)
1396 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1397
1398 err = netif_set_real_num_queues(nn->dp.netdev,
1399 nn->dp.num_stack_tx_rings,
1400 nn->dp.num_rx_rings);
1401 if (err)
1402 return err;
1403
1404 return nfp_net_set_config_and_enable(nn);
1405 }
1406
nfp_net_clone_dp(struct nfp_net * nn)1407 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
1408 {
1409 struct nfp_net_dp *new;
1410
1411 new = kmalloc(sizeof(*new), GFP_KERNEL);
1412 if (!new)
1413 return NULL;
1414
1415 *new = nn->dp;
1416
1417 new->xsk_pools = kmemdup(new->xsk_pools,
1418 array_size(nn->max_r_vecs,
1419 sizeof(new->xsk_pools)),
1420 GFP_KERNEL);
1421 if (!new->xsk_pools) {
1422 kfree(new);
1423 return NULL;
1424 }
1425
1426 /* Clear things which need to be recomputed */
1427 new->fl_bufsz = 0;
1428 new->tx_rings = NULL;
1429 new->rx_rings = NULL;
1430 new->num_r_vecs = 0;
1431 new->num_stack_tx_rings = 0;
1432 new->txrwb = NULL;
1433 new->txrwb_dma = 0;
1434
1435 return new;
1436 }
1437
nfp_net_free_dp(struct nfp_net_dp * dp)1438 static void nfp_net_free_dp(struct nfp_net_dp *dp)
1439 {
1440 kfree(dp->xsk_pools);
1441 kfree(dp);
1442 }
1443
1444 static int
nfp_net_check_config(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1445 nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
1446 struct netlink_ext_ack *extack)
1447 {
1448 unsigned int r, xsk_min_fl_bufsz;
1449
1450 /* XDP-enabled tests */
1451 if (!dp->xdp_prog)
1452 return 0;
1453 if (dp->fl_bufsz > PAGE_SIZE) {
1454 NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
1455 return -EINVAL;
1456 }
1457 if (dp->num_tx_rings > nn->max_tx_rings) {
1458 NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
1459 return -EINVAL;
1460 }
1461
1462 xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp);
1463 for (r = 0; r < nn->max_r_vecs; r++) {
1464 if (!dp->xsk_pools[r])
1465 continue;
1466
1467 if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) {
1468 NL_SET_ERR_MSG_MOD(extack,
1469 "XSK buffer pool chunk size too small");
1470 return -EINVAL;
1471 }
1472 }
1473
1474 return 0;
1475 }
1476
nfp_net_ring_reconfig(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1477 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
1478 struct netlink_ext_ack *extack)
1479 {
1480 int r, err;
1481
1482 dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
1483
1484 dp->num_stack_tx_rings = dp->num_tx_rings;
1485 if (dp->xdp_prog)
1486 dp->num_stack_tx_rings -= dp->num_rx_rings;
1487
1488 dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
1489
1490 err = nfp_net_check_config(nn, dp, extack);
1491 if (err)
1492 goto exit_free_dp;
1493
1494 if (!netif_running(dp->netdev)) {
1495 nfp_net_dp_swap(nn, dp);
1496 err = 0;
1497 goto exit_free_dp;
1498 }
1499
1500 /* Prepare new rings */
1501 for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
1502 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1503 if (err) {
1504 dp->num_r_vecs = r;
1505 goto err_cleanup_vecs;
1506 }
1507 }
1508
1509 err = nfp_net_rx_rings_prepare(nn, dp);
1510 if (err)
1511 goto err_cleanup_vecs;
1512
1513 err = nfp_net_tx_rings_prepare(nn, dp);
1514 if (err)
1515 goto err_free_rx;
1516
1517 /* Stop device, swap in new rings, try to start the firmware */
1518 nfp_net_close_stack(nn);
1519 nfp_net_clear_config_and_disable(nn);
1520
1521 err = nfp_net_dp_swap_enable(nn, dp);
1522 if (err) {
1523 int err2;
1524
1525 nfp_net_clear_config_and_disable(nn);
1526
1527 /* Try with old configuration and old rings */
1528 err2 = nfp_net_dp_swap_enable(nn, dp);
1529 if (err2)
1530 nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
1531 err, err2);
1532 }
1533 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1534 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1535
1536 nfp_net_rx_rings_free(dp);
1537 nfp_net_tx_rings_free(dp);
1538
1539 nfp_net_open_stack(nn);
1540 exit_free_dp:
1541 nfp_net_free_dp(dp);
1542
1543 return err;
1544
1545 err_free_rx:
1546 nfp_net_rx_rings_free(dp);
1547 err_cleanup_vecs:
1548 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1549 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1550 nfp_net_free_dp(dp);
1551 return err;
1552 }
1553
nfp_net_change_mtu(struct net_device * netdev,int new_mtu)1554 static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
1555 {
1556 struct nfp_net *nn = netdev_priv(netdev);
1557 struct nfp_net_dp *dp;
1558 int err;
1559
1560 err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
1561 if (err)
1562 return err;
1563
1564 dp = nfp_net_clone_dp(nn);
1565 if (!dp)
1566 return -ENOMEM;
1567
1568 dp->mtu = new_mtu;
1569
1570 return nfp_net_ring_reconfig(nn, dp, NULL);
1571 }
1572
1573 static int
nfp_net_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)1574 nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1575 {
1576 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
1577 struct nfp_net *nn = netdev_priv(netdev);
1578 int err;
1579
1580 /* Priority tagged packets with vlan id 0 are processed by the
1581 * NFP as untagged packets
1582 */
1583 if (!vid)
1584 return 0;
1585
1586 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1587 if (err)
1588 return err;
1589
1590 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1591 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1592 ETH_P_8021Q);
1593
1594 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1595 }
1596
1597 static int
nfp_net_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)1598 nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1599 {
1600 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
1601 struct nfp_net *nn = netdev_priv(netdev);
1602 int err;
1603
1604 /* Priority tagged packets with vlan id 0 are processed by the
1605 * NFP as untagged packets
1606 */
1607 if (!vid)
1608 return 0;
1609
1610 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1611 if (err)
1612 return err;
1613
1614 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1615 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1616 ETH_P_8021Q);
1617
1618 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1619 }
1620
nfp_net_stat64(struct net_device * netdev,struct rtnl_link_stats64 * stats)1621 static void nfp_net_stat64(struct net_device *netdev,
1622 struct rtnl_link_stats64 *stats)
1623 {
1624 struct nfp_net *nn = netdev_priv(netdev);
1625 int r;
1626
1627 /* Collect software stats */
1628 for (r = 0; r < nn->max_r_vecs; r++) {
1629 struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
1630 u64 data[3];
1631 unsigned int start;
1632
1633 do {
1634 start = u64_stats_fetch_begin_irq(&r_vec->rx_sync);
1635 data[0] = r_vec->rx_pkts;
1636 data[1] = r_vec->rx_bytes;
1637 data[2] = r_vec->rx_drops;
1638 } while (u64_stats_fetch_retry_irq(&r_vec->rx_sync, start));
1639 stats->rx_packets += data[0];
1640 stats->rx_bytes += data[1];
1641 stats->rx_dropped += data[2];
1642
1643 do {
1644 start = u64_stats_fetch_begin_irq(&r_vec->tx_sync);
1645 data[0] = r_vec->tx_pkts;
1646 data[1] = r_vec->tx_bytes;
1647 data[2] = r_vec->tx_errors;
1648 } while (u64_stats_fetch_retry_irq(&r_vec->tx_sync, start));
1649 stats->tx_packets += data[0];
1650 stats->tx_bytes += data[1];
1651 stats->tx_errors += data[2];
1652 }
1653
1654 /* Add in device stats */
1655 stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
1656 stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
1657 stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
1658
1659 stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
1660 stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
1661 }
1662
nfp_net_set_features(struct net_device * netdev,netdev_features_t features)1663 static int nfp_net_set_features(struct net_device *netdev,
1664 netdev_features_t features)
1665 {
1666 netdev_features_t changed = netdev->features ^ features;
1667 struct nfp_net *nn = netdev_priv(netdev);
1668 u32 new_ctrl;
1669 int err;
1670
1671 /* Assume this is not called with features we have not advertised */
1672
1673 new_ctrl = nn->dp.ctrl;
1674
1675 if (changed & NETIF_F_RXCSUM) {
1676 if (features & NETIF_F_RXCSUM)
1677 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
1678 else
1679 new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
1680 }
1681
1682 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
1683 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
1684 new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
1685 else
1686 new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
1687 }
1688
1689 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1690 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1691 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
1692 NFP_NET_CFG_CTRL_LSO;
1693 else
1694 new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
1695 }
1696
1697 if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
1698 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1699 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
1700 NFP_NET_CFG_CTRL_RXVLAN;
1701 else
1702 new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY;
1703 }
1704
1705 if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
1706 if (features & NETIF_F_HW_VLAN_CTAG_TX)
1707 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
1708 NFP_NET_CFG_CTRL_TXVLAN;
1709 else
1710 new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY;
1711 }
1712
1713 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
1714 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1715 new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
1716 else
1717 new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
1718 }
1719
1720 if (changed & NETIF_F_HW_VLAN_STAG_RX) {
1721 if (features & NETIF_F_HW_VLAN_STAG_RX)
1722 new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
1723 else
1724 new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
1725 }
1726
1727 if (changed & NETIF_F_SG) {
1728 if (features & NETIF_F_SG)
1729 new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
1730 else
1731 new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
1732 }
1733
1734 err = nfp_port_set_features(netdev, features);
1735 if (err)
1736 return err;
1737
1738 nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
1739 netdev->features, features, changed);
1740
1741 if (new_ctrl == nn->dp.ctrl)
1742 return 0;
1743
1744 nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
1745 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1746 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
1747 if (err)
1748 return err;
1749
1750 nn->dp.ctrl = new_ctrl;
1751
1752 return 0;
1753 }
1754
1755 static netdev_features_t
nfp_net_fix_features(struct net_device * netdev,netdev_features_t features)1756 nfp_net_fix_features(struct net_device *netdev,
1757 netdev_features_t features)
1758 {
1759 if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
1760 (features & NETIF_F_HW_VLAN_STAG_RX)) {
1761 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
1762 features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1763 netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1764 netdev_warn(netdev,
1765 "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n");
1766 } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) {
1767 features &= ~NETIF_F_HW_VLAN_STAG_RX;
1768 netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX;
1769 netdev_warn(netdev,
1770 "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n");
1771 }
1772 }
1773 return features;
1774 }
1775
1776 static netdev_features_t
nfp_net_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)1777 nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
1778 netdev_features_t features)
1779 {
1780 u8 l4_hdr;
1781
1782 /* We can't do TSO over double tagged packets (802.1AD) */
1783 features &= vlan_features_check(skb, features);
1784
1785 if (!skb->encapsulation)
1786 return features;
1787
1788 /* Ensure that inner L4 header offset fits into TX descriptor field */
1789 if (skb_is_gso(skb)) {
1790 u32 hdrlen;
1791
1792 hdrlen = skb_inner_tcp_all_headers(skb);
1793
1794 /* Assume worst case scenario of having longest possible
1795 * metadata prepend - 8B
1796 */
1797 if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
1798 features &= ~NETIF_F_GSO_MASK;
1799 }
1800
1801 /* VXLAN/GRE check */
1802 switch (vlan_get_protocol(skb)) {
1803 case htons(ETH_P_IP):
1804 l4_hdr = ip_hdr(skb)->protocol;
1805 break;
1806 case htons(ETH_P_IPV6):
1807 l4_hdr = ipv6_hdr(skb)->nexthdr;
1808 break;
1809 default:
1810 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1811 }
1812
1813 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
1814 skb->inner_protocol != htons(ETH_P_TEB) ||
1815 (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
1816 (l4_hdr == IPPROTO_UDP &&
1817 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
1818 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
1819 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1820
1821 return features;
1822 }
1823
1824 static int
nfp_net_get_phys_port_name(struct net_device * netdev,char * name,size_t len)1825 nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
1826 {
1827 struct nfp_net *nn = netdev_priv(netdev);
1828 int n;
1829
1830 /* If port is defined, devlink_port is registered and devlink core
1831 * is taking care of name formatting.
1832 */
1833 if (nn->port)
1834 return -EOPNOTSUPP;
1835
1836 if (nn->dp.is_vf || nn->vnic_no_name)
1837 return -EOPNOTSUPP;
1838
1839 n = snprintf(name, len, "n%d", nn->id);
1840 if (n >= len)
1841 return -EINVAL;
1842
1843 return 0;
1844 }
1845
nfp_net_xdp_setup_drv(struct nfp_net * nn,struct netdev_bpf * bpf)1846 static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
1847 {
1848 struct bpf_prog *prog = bpf->prog;
1849 struct nfp_net_dp *dp;
1850 int err;
1851
1852 if (!prog == !nn->dp.xdp_prog) {
1853 WRITE_ONCE(nn->dp.xdp_prog, prog);
1854 xdp_attachment_setup(&nn->xdp, bpf);
1855 return 0;
1856 }
1857
1858 dp = nfp_net_clone_dp(nn);
1859 if (!dp)
1860 return -ENOMEM;
1861
1862 dp->xdp_prog = prog;
1863 dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
1864 dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
1865 dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
1866
1867 /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
1868 err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
1869 if (err)
1870 return err;
1871
1872 xdp_attachment_setup(&nn->xdp, bpf);
1873 return 0;
1874 }
1875
nfp_net_xdp_setup_hw(struct nfp_net * nn,struct netdev_bpf * bpf)1876 static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
1877 {
1878 int err;
1879
1880 err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
1881 if (err)
1882 return err;
1883
1884 xdp_attachment_setup(&nn->xdp_hw, bpf);
1885 return 0;
1886 }
1887
nfp_net_xdp(struct net_device * netdev,struct netdev_bpf * xdp)1888 static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
1889 {
1890 struct nfp_net *nn = netdev_priv(netdev);
1891
1892 switch (xdp->command) {
1893 case XDP_SETUP_PROG:
1894 return nfp_net_xdp_setup_drv(nn, xdp);
1895 case XDP_SETUP_PROG_HW:
1896 return nfp_net_xdp_setup_hw(nn, xdp);
1897 case XDP_SETUP_XSK_POOL:
1898 return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool,
1899 xdp->xsk.queue_id);
1900 default:
1901 return nfp_app_bpf(nn->app, nn, xdp);
1902 }
1903 }
1904
nfp_net_set_mac_address(struct net_device * netdev,void * addr)1905 static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
1906 {
1907 struct nfp_net *nn = netdev_priv(netdev);
1908 struct sockaddr *saddr = addr;
1909 int err;
1910
1911 err = eth_prepare_mac_addr_change(netdev, addr);
1912 if (err)
1913 return err;
1914
1915 nfp_net_write_mac_addr(nn, saddr->sa_data);
1916
1917 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
1918 if (err)
1919 return err;
1920
1921 eth_commit_mac_addr_change(netdev, addr);
1922
1923 return 0;
1924 }
1925
nfp_net_bridge_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)1926 static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
1927 struct net_device *dev, u32 filter_mask,
1928 int nlflags)
1929 {
1930 struct nfp_net *nn = netdev_priv(dev);
1931 u16 mode;
1932
1933 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
1934 return -EOPNOTSUPP;
1935
1936 mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ?
1937 BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB;
1938
1939 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
1940 nlflags, filter_mask, NULL);
1941 }
1942
nfp_net_bridge_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)1943 static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
1944 u16 flags, struct netlink_ext_ack *extack)
1945 {
1946 struct nfp_net *nn = netdev_priv(dev);
1947 struct nlattr *attr, *br_spec;
1948 int rem, err;
1949 u32 new_ctrl;
1950 u16 mode;
1951
1952 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
1953 return -EOPNOTSUPP;
1954
1955 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
1956 if (!br_spec)
1957 return -EINVAL;
1958
1959 nla_for_each_nested(attr, br_spec, rem) {
1960 if (nla_type(attr) != IFLA_BRIDGE_MODE)
1961 continue;
1962
1963 if (nla_len(attr) < sizeof(mode))
1964 return -EINVAL;
1965
1966 new_ctrl = nn->dp.ctrl;
1967 mode = nla_get_u16(attr);
1968 if (mode == BRIDGE_MODE_VEPA)
1969 new_ctrl |= NFP_NET_CFG_CTRL_VEPA;
1970 else if (mode == BRIDGE_MODE_VEB)
1971 new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA;
1972 else
1973 return -EOPNOTSUPP;
1974
1975 if (new_ctrl == nn->dp.ctrl)
1976 return 0;
1977
1978 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1979 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
1980 if (!err)
1981 nn->dp.ctrl = new_ctrl;
1982
1983 return err;
1984 }
1985
1986 return -EINVAL;
1987 }
1988
1989 const struct net_device_ops nfp_nfd3_netdev_ops = {
1990 .ndo_init = nfp_app_ndo_init,
1991 .ndo_uninit = nfp_app_ndo_uninit,
1992 .ndo_open = nfp_net_netdev_open,
1993 .ndo_stop = nfp_net_netdev_close,
1994 .ndo_start_xmit = nfp_net_tx,
1995 .ndo_get_stats64 = nfp_net_stat64,
1996 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
1997 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
1998 .ndo_set_vf_mac = nfp_app_set_vf_mac,
1999 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2000 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2001 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2002 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2003 .ndo_get_vf_config = nfp_app_get_vf_config,
2004 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2005 .ndo_setup_tc = nfp_port_setup_tc,
2006 .ndo_tx_timeout = nfp_net_tx_timeout,
2007 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2008 .ndo_change_mtu = nfp_net_change_mtu,
2009 .ndo_set_mac_address = nfp_net_set_mac_address,
2010 .ndo_set_features = nfp_net_set_features,
2011 .ndo_fix_features = nfp_net_fix_features,
2012 .ndo_features_check = nfp_net_features_check,
2013 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2014 .ndo_bpf = nfp_net_xdp,
2015 .ndo_xsk_wakeup = nfp_net_xsk_wakeup,
2016 .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
2017 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2018 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2019 };
2020
2021 const struct net_device_ops nfp_nfdk_netdev_ops = {
2022 .ndo_init = nfp_app_ndo_init,
2023 .ndo_uninit = nfp_app_ndo_uninit,
2024 .ndo_open = nfp_net_netdev_open,
2025 .ndo_stop = nfp_net_netdev_close,
2026 .ndo_start_xmit = nfp_net_tx,
2027 .ndo_get_stats64 = nfp_net_stat64,
2028 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2029 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2030 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2031 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2032 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2033 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2034 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2035 .ndo_get_vf_config = nfp_app_get_vf_config,
2036 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2037 .ndo_setup_tc = nfp_port_setup_tc,
2038 .ndo_tx_timeout = nfp_net_tx_timeout,
2039 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2040 .ndo_change_mtu = nfp_net_change_mtu,
2041 .ndo_set_mac_address = nfp_net_set_mac_address,
2042 .ndo_set_features = nfp_net_set_features,
2043 .ndo_fix_features = nfp_net_fix_features,
2044 .ndo_features_check = nfp_net_features_check,
2045 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2046 .ndo_bpf = nfp_net_xdp,
2047 .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
2048 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2049 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2050 };
2051
nfp_udp_tunnel_sync(struct net_device * netdev,unsigned int table)2052 static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
2053 {
2054 struct nfp_net *nn = netdev_priv(netdev);
2055 int i;
2056
2057 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
2058 for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
2059 struct udp_tunnel_info ti0, ti1;
2060
2061 udp_tunnel_nic_get_port(netdev, table, i, &ti0);
2062 udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
2063
2064 nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
2065 be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
2066 }
2067
2068 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
2069 }
2070
2071 static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
2072 .sync_table = nfp_udp_tunnel_sync,
2073 .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP |
2074 UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
2075 .tables = {
2076 {
2077 .n_entries = NFP_NET_N_VXLAN_PORTS,
2078 .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
2079 },
2080 },
2081 };
2082
2083 /**
2084 * nfp_net_info() - Print general info about the NIC
2085 * @nn: NFP Net device to reconfigure
2086 */
nfp_net_info(struct nfp_net * nn)2087 void nfp_net_info(struct nfp_net *nn)
2088 {
2089 nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
2090 nn->dp.is_vf ? "VF " : "",
2091 nn->dp.num_tx_rings, nn->max_tx_rings,
2092 nn->dp.num_rx_rings, nn->max_rx_rings);
2093 nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
2094 nn->fw_ver.extend, nn->fw_ver.class,
2095 nn->fw_ver.major, nn->fw_ver.minor,
2096 nn->max_mtu);
2097 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\n",
2098 nn->cap,
2099 nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
2100 nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
2101 nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
2102 nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
2103 nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
2104 nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
2105 nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
2106 nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "",
2107 nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "",
2108 nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "",
2109 nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
2110 nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
2111 nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "",
2112 nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
2113 nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
2114 nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
2115 nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
2116 nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
2117 nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
2118 nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "",
2119 nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "",
2120 nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
2121 nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "",
2122 nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
2123 "RXCSUM_COMPLETE " : "",
2124 nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
2125 nfp_app_extra_cap(nn->app, nn));
2126 }
2127
2128 /**
2129 * nfp_net_alloc() - Allocate netdev and related structure
2130 * @pdev: PCI device
2131 * @dev_info: NFP ASIC params
2132 * @ctrl_bar: PCI IOMEM with vNIC config memory
2133 * @needs_netdev: Whether to allocate a netdev for this vNIC
2134 * @max_tx_rings: Maximum number of TX rings supported by device
2135 * @max_rx_rings: Maximum number of RX rings supported by device
2136 *
2137 * This function allocates a netdev device and fills in the initial
2138 * part of the @struct nfp_net structure. In case of control device
2139 * nfp_net structure is allocated without the netdev.
2140 *
2141 * Return: NFP Net device structure, or ERR_PTR on error.
2142 */
2143 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)2144 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
2145 void __iomem *ctrl_bar, bool needs_netdev,
2146 unsigned int max_tx_rings, unsigned int max_rx_rings)
2147 {
2148 u64 dma_mask = dma_get_mask(&pdev->dev);
2149 struct nfp_net *nn;
2150 int err;
2151
2152 if (needs_netdev) {
2153 struct net_device *netdev;
2154
2155 netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
2156 max_tx_rings, max_rx_rings);
2157 if (!netdev)
2158 return ERR_PTR(-ENOMEM);
2159
2160 SET_NETDEV_DEV(netdev, &pdev->dev);
2161 nn = netdev_priv(netdev);
2162 nn->dp.netdev = netdev;
2163 } else {
2164 nn = vzalloc(sizeof(*nn));
2165 if (!nn)
2166 return ERR_PTR(-ENOMEM);
2167 }
2168
2169 nn->dp.dev = &pdev->dev;
2170 nn->dp.ctrl_bar = ctrl_bar;
2171 nn->dev_info = dev_info;
2172 nn->pdev = pdev;
2173 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
2174
2175 switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) {
2176 case NFP_NET_CFG_VERSION_DP_NFD3:
2177 nn->dp.ops = &nfp_nfd3_ops;
2178 break;
2179 case NFP_NET_CFG_VERSION_DP_NFDK:
2180 if (nn->fw_ver.major < 5) {
2181 dev_err(&pdev->dev,
2182 "NFDK must use ABI 5 or newer, found: %d\n",
2183 nn->fw_ver.major);
2184 err = -EINVAL;
2185 goto err_free_nn;
2186 }
2187 nn->dp.ops = &nfp_nfdk_ops;
2188 break;
2189 default:
2190 err = -EINVAL;
2191 goto err_free_nn;
2192 }
2193
2194 if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) {
2195 dev_err(&pdev->dev,
2196 "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n",
2197 nn->dp.ops->dma_mask, dma_mask);
2198 err = -EINVAL;
2199 goto err_free_nn;
2200 }
2201
2202 nn->max_tx_rings = max_tx_rings;
2203 nn->max_rx_rings = max_rx_rings;
2204
2205 nn->dp.num_tx_rings = min_t(unsigned int,
2206 max_tx_rings, num_online_cpus());
2207 nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
2208 netif_get_num_default_rss_queues());
2209
2210 nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
2211 nn->dp.num_r_vecs = min_t(unsigned int,
2212 nn->dp.num_r_vecs, num_online_cpus());
2213 nn->max_r_vecs = nn->dp.num_r_vecs;
2214
2215 nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools),
2216 GFP_KERNEL);
2217 if (!nn->dp.xsk_pools) {
2218 err = -ENOMEM;
2219 goto err_free_nn;
2220 }
2221
2222 nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
2223 nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
2224
2225 sema_init(&nn->bar_lock, 1);
2226
2227 spin_lock_init(&nn->reconfig_lock);
2228 spin_lock_init(&nn->link_status_lock);
2229
2230 timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
2231
2232 err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
2233 &nn->tlv_caps);
2234 if (err)
2235 goto err_free_nn;
2236
2237 err = nfp_ccm_mbox_alloc(nn);
2238 if (err)
2239 goto err_free_nn;
2240
2241 return nn;
2242
2243 err_free_nn:
2244 if (nn->dp.netdev)
2245 free_netdev(nn->dp.netdev);
2246 else
2247 vfree(nn);
2248 return ERR_PTR(err);
2249 }
2250
2251 /**
2252 * nfp_net_free() - Undo what @nfp_net_alloc() did
2253 * @nn: NFP Net device to reconfigure
2254 */
nfp_net_free(struct nfp_net * nn)2255 void nfp_net_free(struct nfp_net *nn)
2256 {
2257 WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted);
2258 nfp_ccm_mbox_free(nn);
2259
2260 kfree(nn->dp.xsk_pools);
2261 if (nn->dp.netdev)
2262 free_netdev(nn->dp.netdev);
2263 else
2264 vfree(nn);
2265 }
2266
2267 /**
2268 * nfp_net_rss_key_sz() - Get current size of the RSS key
2269 * @nn: NFP Net device instance
2270 *
2271 * Return: size of the RSS key for currently selected hash function.
2272 */
nfp_net_rss_key_sz(struct nfp_net * nn)2273 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
2274 {
2275 switch (nn->rss_hfunc) {
2276 case ETH_RSS_HASH_TOP:
2277 return NFP_NET_CFG_RSS_KEY_SZ;
2278 case ETH_RSS_HASH_XOR:
2279 return 0;
2280 case ETH_RSS_HASH_CRC32:
2281 return 4;
2282 }
2283
2284 nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
2285 return 0;
2286 }
2287
2288 /**
2289 * nfp_net_rss_init() - Set the initial RSS parameters
2290 * @nn: NFP Net device to reconfigure
2291 */
nfp_net_rss_init(struct nfp_net * nn)2292 static void nfp_net_rss_init(struct nfp_net *nn)
2293 {
2294 unsigned long func_bit, rss_cap_hfunc;
2295 u32 reg;
2296
2297 /* Read the RSS function capability and select first supported func */
2298 reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
2299 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
2300 if (!rss_cap_hfunc)
2301 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
2302 NFP_NET_CFG_RSS_TOEPLITZ);
2303
2304 func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
2305 if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
2306 dev_warn(nn->dp.dev,
2307 "Bad RSS config, defaulting to Toeplitz hash\n");
2308 func_bit = ETH_RSS_HASH_TOP_BIT;
2309 }
2310 nn->rss_hfunc = 1 << func_bit;
2311
2312 netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
2313
2314 nfp_net_rss_init_itbl(nn);
2315
2316 /* Enable IPv4/IPv6 TCP by default */
2317 nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
2318 NFP_NET_CFG_RSS_IPV6_TCP |
2319 FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
2320 NFP_NET_CFG_RSS_MASK;
2321 }
2322
2323 /**
2324 * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
2325 * @nn: NFP Net device to reconfigure
2326 */
nfp_net_irqmod_init(struct nfp_net * nn)2327 static void nfp_net_irqmod_init(struct nfp_net *nn)
2328 {
2329 nn->rx_coalesce_usecs = 50;
2330 nn->rx_coalesce_max_frames = 64;
2331 nn->tx_coalesce_usecs = 50;
2332 nn->tx_coalesce_max_frames = 64;
2333
2334 nn->rx_coalesce_adapt_on = true;
2335 nn->tx_coalesce_adapt_on = true;
2336 }
2337
nfp_net_netdev_init(struct nfp_net * nn)2338 static void nfp_net_netdev_init(struct nfp_net *nn)
2339 {
2340 struct net_device *netdev = nn->dp.netdev;
2341
2342 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
2343
2344 netdev->mtu = nn->dp.mtu;
2345
2346 /* Advertise/enable offloads based on capabilities
2347 *
2348 * Note: netdev->features show the currently enabled features
2349 * and netdev->hw_features advertises which features are
2350 * supported. By default we enable most features.
2351 */
2352 if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
2353 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2354
2355 netdev->hw_features = NETIF_F_HIGHDMA;
2356 if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
2357 netdev->hw_features |= NETIF_F_RXCSUM;
2358 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2359 }
2360 if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
2361 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2362 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2363 }
2364 if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
2365 netdev->hw_features |= NETIF_F_SG;
2366 nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
2367 }
2368 if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
2369 nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2370 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2371 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2372 NFP_NET_CFG_CTRL_LSO;
2373 }
2374 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
2375 netdev->hw_features |= NETIF_F_RXHASH;
2376 if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
2377 if (nn->cap & NFP_NET_CFG_CTRL_LSO) {
2378 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
2379 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2380 NETIF_F_GSO_PARTIAL;
2381 netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
2382 }
2383 netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
2384 nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
2385 }
2386 if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
2387 if (nn->cap & NFP_NET_CFG_CTRL_LSO)
2388 netdev->hw_features |= NETIF_F_GSO_GRE;
2389 nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE;
2390 }
2391 if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
2392 netdev->hw_enc_features = netdev->hw_features;
2393
2394 netdev->vlan_features = netdev->hw_features;
2395
2396 if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) {
2397 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
2398 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2399 NFP_NET_CFG_CTRL_RXVLAN;
2400 }
2401 if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) {
2402 if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2403 nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
2404 } else {
2405 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
2406 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2407 NFP_NET_CFG_CTRL_TXVLAN;
2408 }
2409 }
2410 if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
2411 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2412 nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2413 }
2414 if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) {
2415 netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
2416 nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2417 }
2418
2419 netdev->features = netdev->hw_features;
2420
2421 if (nfp_app_has_tc(nn->app) && nn->port)
2422 netdev->hw_features |= NETIF_F_HW_TC;
2423
2424 /* C-Tag strip and S-Tag strip can't be supported simultaneously,
2425 * so enable C-Tag strip and disable S-Tag strip by default.
2426 */
2427 netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX;
2428 nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2429
2430 /* Finalise the netdev setup */
2431 switch (nn->dp.ops->version) {
2432 case NFP_NFD_VER_NFD3:
2433 netdev->netdev_ops = &nfp_nfd3_netdev_ops;
2434 break;
2435 case NFP_NFD_VER_NFDK:
2436 netdev->netdev_ops = &nfp_nfdk_netdev_ops;
2437 break;
2438 }
2439
2440 netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
2441
2442 /* MTU range: 68 - hw-specific max */
2443 netdev->min_mtu = ETH_MIN_MTU;
2444 netdev->max_mtu = nn->max_mtu;
2445
2446 netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
2447
2448 netif_carrier_off(netdev);
2449
2450 nfp_net_set_ethtool_ops(netdev);
2451 }
2452
nfp_net_read_caps(struct nfp_net * nn)2453 static int nfp_net_read_caps(struct nfp_net *nn)
2454 {
2455 /* Get some of the read-only fields from the BAR */
2456 nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
2457 nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
2458
2459 /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
2460 * we allow use of non-chained metadata if RSS(v1) is the only
2461 * advertised capability requiring metadata.
2462 */
2463 nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
2464 !nn->dp.netdev ||
2465 !(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
2466 nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
2467 /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where
2468 * it has the same meaning as RSSv2.
2469 */
2470 if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
2471 nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
2472
2473 /* Determine RX packet/metadata boundary offset */
2474 if (nn->fw_ver.major >= 2) {
2475 u32 reg;
2476
2477 reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
2478 if (reg > NFP_NET_MAX_PREPEND) {
2479 nn_err(nn, "Invalid rx offset: %d\n", reg);
2480 return -EINVAL;
2481 }
2482 nn->dp.rx_offset = reg;
2483 } else {
2484 nn->dp.rx_offset = NFP_NET_RX_OFFSET;
2485 }
2486
2487 /* Mask out NFD-version-specific features */
2488 nn->cap &= nn->dp.ops->cap_mask;
2489
2490 /* For control vNICs mask out the capabilities app doesn't want. */
2491 if (!nn->dp.netdev)
2492 nn->cap &= nn->app->type->ctrl_cap_mask;
2493
2494 return 0;
2495 }
2496
2497 /**
2498 * nfp_net_init() - Initialise/finalise the nfp_net structure
2499 * @nn: NFP Net device structure
2500 *
2501 * Return: 0 on success or negative errno on error.
2502 */
nfp_net_init(struct nfp_net * nn)2503 int nfp_net_init(struct nfp_net *nn)
2504 {
2505 int err;
2506
2507 nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
2508
2509 err = nfp_net_read_caps(nn);
2510 if (err)
2511 return err;
2512
2513 /* Set default MTU and Freelist buffer size */
2514 if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) {
2515 nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu);
2516 } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) {
2517 nn->dp.mtu = nn->max_mtu;
2518 } else {
2519 nn->dp.mtu = NFP_NET_DEFAULT_MTU;
2520 }
2521 nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
2522
2523 if (nfp_app_ctrl_uses_data_vnics(nn->app))
2524 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA;
2525
2526 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
2527 nfp_net_rss_init(nn);
2528 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
2529 NFP_NET_CFG_CTRL_RSS;
2530 }
2531
2532 /* Allow L2 Broadcast and Multicast through by default, if supported */
2533 if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
2534 nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
2535
2536 /* Allow IRQ moderation, if supported */
2537 if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
2538 nfp_net_irqmod_init(nn);
2539 nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
2540 }
2541
2542 /* Enable TX pointer writeback, if supported */
2543 if (nn->cap & NFP_NET_CFG_CTRL_TXRWB)
2544 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB;
2545
2546 /* Stash the re-configuration queue away. First odd queue in TX Bar */
2547 nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
2548
2549 /* Make sure the FW knows the netdev is supposed to be disabled here */
2550 nn_writel(nn, NFP_NET_CFG_CTRL, 0);
2551 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
2552 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
2553 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
2554 NFP_NET_CFG_UPDATE_GEN);
2555 if (err)
2556 return err;
2557
2558 if (nn->dp.netdev) {
2559 nfp_net_netdev_init(nn);
2560
2561 err = nfp_ccm_mbox_init(nn);
2562 if (err)
2563 return err;
2564
2565 err = nfp_net_tls_init(nn);
2566 if (err)
2567 goto err_clean_mbox;
2568 }
2569
2570 nfp_net_vecs_init(nn);
2571
2572 if (!nn->dp.netdev)
2573 return 0;
2574 return register_netdev(nn->dp.netdev);
2575
2576 err_clean_mbox:
2577 nfp_ccm_mbox_clean(nn);
2578 return err;
2579 }
2580
2581 /**
2582 * nfp_net_clean() - Undo what nfp_net_init() did.
2583 * @nn: NFP Net device structure
2584 */
nfp_net_clean(struct nfp_net * nn)2585 void nfp_net_clean(struct nfp_net *nn)
2586 {
2587 if (!nn->dp.netdev)
2588 return;
2589
2590 unregister_netdev(nn->dp.netdev);
2591 nfp_ccm_mbox_clean(nn);
2592 nfp_net_reconfig_wait_posted(nn);
2593 }
2594