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, moder.pkts))
1180 return;
1181
1182 /* copy RX interrupt coalesce parameters */
1183 value = (moder.pkts << 16) | (factor * moder.usec);
1184 nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), value);
1185 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1186
1187 dim->state = DIM_START_MEASURE;
1188 }
1189
nfp_net_tx_dim_work(struct work_struct * work)1190 static void nfp_net_tx_dim_work(struct work_struct *work)
1191 {
1192 struct nfp_net_r_vector *r_vec;
1193 unsigned int factor, value;
1194 struct dim_cq_moder moder;
1195 struct nfp_net *nn;
1196 struct dim *dim;
1197
1198 dim = container_of(work, struct dim, work);
1199 moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
1200 r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim);
1201 nn = r_vec->nfp_net;
1202
1203 /* Compute factor used to convert coalesce '_usecs' parameters to
1204 * ME timestamp ticks. There are 16 ME clock cycles for each timestamp
1205 * count.
1206 */
1207 factor = nn->tlv_caps.me_freq_mhz / 16;
1208 if (nfp_net_coalesce_para_check(factor * moder.usec, moder.pkts))
1209 return;
1210
1211 /* copy TX interrupt coalesce parameters */
1212 value = (moder.pkts << 16) | (factor * moder.usec);
1213 nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), value);
1214 (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD);
1215
1216 dim->state = DIM_START_MEASURE;
1217 }
1218
1219 /**
1220 * nfp_net_open_stack() - Start the device from stack's perspective
1221 * @nn: NFP Net device to reconfigure
1222 */
nfp_net_open_stack(struct nfp_net * nn)1223 static void nfp_net_open_stack(struct nfp_net *nn)
1224 {
1225 struct nfp_net_r_vector *r_vec;
1226 unsigned int r;
1227
1228 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1229 r_vec = &nn->r_vecs[r];
1230
1231 if (r_vec->rx_ring) {
1232 INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work);
1233 r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1234 }
1235
1236 if (r_vec->tx_ring) {
1237 INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work);
1238 r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
1239 }
1240
1241 napi_enable(&r_vec->napi);
1242 enable_irq(r_vec->irq_vector);
1243 }
1244
1245 netif_tx_wake_all_queues(nn->dp.netdev);
1246
1247 enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1248 nfp_net_read_link_status(nn);
1249 }
1250
nfp_net_open_alloc_all(struct nfp_net * nn)1251 static int nfp_net_open_alloc_all(struct nfp_net *nn)
1252 {
1253 int err, r;
1254
1255 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
1256 nn->exn_name, sizeof(nn->exn_name),
1257 NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
1258 if (err)
1259 return err;
1260 err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
1261 nn->lsc_name, sizeof(nn->lsc_name),
1262 NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
1263 if (err)
1264 goto err_free_exn;
1265 disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
1266
1267 for (r = 0; r < nn->dp.num_r_vecs; r++) {
1268 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1269 if (err)
1270 goto err_cleanup_vec_p;
1271 }
1272
1273 err = nfp_net_rx_rings_prepare(nn, &nn->dp);
1274 if (err)
1275 goto err_cleanup_vec;
1276
1277 err = nfp_net_tx_rings_prepare(nn, &nn->dp);
1278 if (err)
1279 goto err_free_rx_rings;
1280
1281 for (r = 0; r < nn->max_r_vecs; r++)
1282 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1283
1284 return 0;
1285
1286 err_free_rx_rings:
1287 nfp_net_rx_rings_free(&nn->dp);
1288 err_cleanup_vec:
1289 r = nn->dp.num_r_vecs;
1290 err_cleanup_vec_p:
1291 while (r--)
1292 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1293 nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
1294 err_free_exn:
1295 nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
1296 return err;
1297 }
1298
nfp_net_netdev_open(struct net_device * netdev)1299 static int nfp_net_netdev_open(struct net_device *netdev)
1300 {
1301 struct nfp_net *nn = netdev_priv(netdev);
1302 int err;
1303
1304 /* Step 1: Allocate resources for rings and the like
1305 * - Request interrupts
1306 * - Allocate RX and TX ring resources
1307 * - Setup initial RSS table
1308 */
1309 err = nfp_net_open_alloc_all(nn);
1310 if (err)
1311 return err;
1312
1313 err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
1314 if (err)
1315 goto err_free_all;
1316
1317 err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
1318 if (err)
1319 goto err_free_all;
1320
1321 /* Step 2: Configure the NFP
1322 * - Ifup the physical interface if it exists
1323 * - Enable rings from 0 to tx_rings/rx_rings - 1.
1324 * - Write MAC address (in case it changed)
1325 * - Set the MTU
1326 * - Set the Freelist buffer size
1327 * - Enable the FW
1328 */
1329 err = nfp_port_configure(netdev, true);
1330 if (err)
1331 goto err_free_all;
1332
1333 err = nfp_net_set_config_and_enable(nn);
1334 if (err)
1335 goto err_port_disable;
1336
1337 /* Step 3: Enable for kernel
1338 * - put some freelist descriptors on each RX ring
1339 * - enable NAPI on each ring
1340 * - enable all TX queues
1341 * - set link state
1342 */
1343 nfp_net_open_stack(nn);
1344
1345 return 0;
1346
1347 err_port_disable:
1348 nfp_port_configure(netdev, false);
1349 err_free_all:
1350 nfp_net_close_free_all(nn);
1351 return err;
1352 }
1353
nfp_ctrl_open(struct nfp_net * nn)1354 int nfp_ctrl_open(struct nfp_net *nn)
1355 {
1356 int err, r;
1357
1358 /* ring dumping depends on vNICs being opened/closed under rtnl */
1359 rtnl_lock();
1360
1361 err = nfp_net_open_alloc_all(nn);
1362 if (err)
1363 goto err_unlock;
1364
1365 err = nfp_net_set_config_and_enable(nn);
1366 if (err)
1367 goto err_free_all;
1368
1369 for (r = 0; r < nn->dp.num_r_vecs; r++)
1370 enable_irq(nn->r_vecs[r].irq_vector);
1371
1372 rtnl_unlock();
1373
1374 return 0;
1375
1376 err_free_all:
1377 nfp_net_close_free_all(nn);
1378 err_unlock:
1379 rtnl_unlock();
1380 return err;
1381 }
1382
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 *))1383 int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len,
1384 int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *))
1385 {
1386 struct nfp_mbox_amsg_entry *entry;
1387
1388 entry = kmalloc(sizeof(*entry) + len, GFP_ATOMIC);
1389 if (!entry)
1390 return -ENOMEM;
1391
1392 memcpy(entry->msg, data, len);
1393 entry->cmd = cmd;
1394 entry->cfg = cb;
1395
1396 spin_lock_bh(&nn->mbox_amsg.lock);
1397 list_add_tail(&entry->list, &nn->mbox_amsg.list);
1398 spin_unlock_bh(&nn->mbox_amsg.lock);
1399
1400 schedule_work(&nn->mbox_amsg.work);
1401
1402 return 0;
1403 }
1404
nfp_net_mbox_amsg_work(struct work_struct * work)1405 static void nfp_net_mbox_amsg_work(struct work_struct *work)
1406 {
1407 struct nfp_net *nn = container_of(work, struct nfp_net, mbox_amsg.work);
1408 struct nfp_mbox_amsg_entry *entry, *tmp;
1409 struct list_head tmp_list;
1410
1411 INIT_LIST_HEAD(&tmp_list);
1412
1413 spin_lock_bh(&nn->mbox_amsg.lock);
1414 list_splice_init(&nn->mbox_amsg.list, &tmp_list);
1415 spin_unlock_bh(&nn->mbox_amsg.lock);
1416
1417 list_for_each_entry_safe(entry, tmp, &tmp_list, list) {
1418 int err = entry->cfg(nn, entry);
1419
1420 if (err)
1421 nn_err(nn, "Config cmd %d to HW failed %d.\n", entry->cmd, err);
1422
1423 list_del(&entry->list);
1424 kfree(entry);
1425 }
1426 }
1427
nfp_net_mc_cfg(struct nfp_net * nn,struct nfp_mbox_amsg_entry * entry)1428 static int nfp_net_mc_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry)
1429 {
1430 unsigned char *addr = entry->msg;
1431 int ret;
1432
1433 ret = nfp_net_mbox_lock(nn, NFP_NET_CFG_MULTICAST_SZ);
1434 if (ret)
1435 return ret;
1436
1437 nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_HI,
1438 get_unaligned_be32(addr));
1439 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_LO,
1440 get_unaligned_be16(addr + 4));
1441
1442 return nfp_net_mbox_reconfig_and_unlock(nn, entry->cmd);
1443 }
1444
nfp_net_mc_sync(struct net_device * netdev,const unsigned char * addr)1445 static int nfp_net_mc_sync(struct net_device *netdev, const unsigned char *addr)
1446 {
1447 struct nfp_net *nn = netdev_priv(netdev);
1448
1449 if (netdev_mc_count(netdev) > NFP_NET_CFG_MAC_MC_MAX) {
1450 nn_err(nn, "Requested number of MC addresses (%d) exceeds maximum (%d).\n",
1451 netdev_mc_count(netdev), NFP_NET_CFG_MAC_MC_MAX);
1452 return -EINVAL;
1453 }
1454
1455 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_ADD, addr,
1456 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1457 }
1458
nfp_net_mc_unsync(struct net_device * netdev,const unsigned char * addr)1459 static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr)
1460 {
1461 struct nfp_net *nn = netdev_priv(netdev);
1462
1463 return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_DEL, addr,
1464 NFP_NET_CFG_MULTICAST_SZ, nfp_net_mc_cfg);
1465 }
1466
nfp_net_set_rx_mode(struct net_device * netdev)1467 static void nfp_net_set_rx_mode(struct net_device *netdev)
1468 {
1469 struct nfp_net *nn = netdev_priv(netdev);
1470 u32 new_ctrl, new_ctrl_w1;
1471
1472 new_ctrl = nn->dp.ctrl;
1473 new_ctrl_w1 = nn->dp.ctrl_w1;
1474
1475 if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI)
1476 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC;
1477 else
1478 new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC;
1479
1480 if (netdev->flags & IFF_ALLMULTI)
1481 new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_MCAST_FILTER;
1482 else
1483 new_ctrl_w1 |= nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER;
1484
1485 if (netdev->flags & IFF_PROMISC) {
1486 if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
1487 new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
1488 else
1489 nn_warn(nn, "FW does not support promiscuous mode\n");
1490 } else {
1491 new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
1492 }
1493
1494 if ((nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) &&
1495 __dev_mc_sync(netdev, nfp_net_mc_sync, nfp_net_mc_unsync))
1496 netdev_err(netdev, "Sync mc address failed\n");
1497
1498 if (new_ctrl == nn->dp.ctrl && new_ctrl_w1 == nn->dp.ctrl_w1)
1499 return;
1500
1501 if (new_ctrl != nn->dp.ctrl)
1502 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1503 if (new_ctrl_w1 != nn->dp.ctrl_w1)
1504 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, new_ctrl_w1);
1505 nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
1506
1507 nn->dp.ctrl = new_ctrl;
1508 nn->dp.ctrl_w1 = new_ctrl_w1;
1509 }
1510
nfp_net_rss_init_itbl(struct nfp_net * nn)1511 static void nfp_net_rss_init_itbl(struct nfp_net *nn)
1512 {
1513 int i;
1514
1515 for (i = 0; i < sizeof(nn->rss_itbl); i++)
1516 nn->rss_itbl[i] =
1517 ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
1518 }
1519
nfp_net_dp_swap(struct nfp_net * nn,struct nfp_net_dp * dp)1520 static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
1521 {
1522 struct nfp_net_dp new_dp = *dp;
1523
1524 *dp = nn->dp;
1525 nn->dp = new_dp;
1526
1527 nn->dp.netdev->mtu = new_dp.mtu;
1528
1529 if (!netif_is_rxfh_configured(nn->dp.netdev))
1530 nfp_net_rss_init_itbl(nn);
1531 }
1532
nfp_net_dp_swap_enable(struct nfp_net * nn,struct nfp_net_dp * dp)1533 static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
1534 {
1535 unsigned int r;
1536 int err;
1537
1538 nfp_net_dp_swap(nn, dp);
1539
1540 for (r = 0; r < nn->max_r_vecs; r++)
1541 nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
1542
1543 err = netif_set_real_num_queues(nn->dp.netdev,
1544 nn->dp.num_stack_tx_rings,
1545 nn->dp.num_rx_rings);
1546 if (err)
1547 return err;
1548
1549 return nfp_net_set_config_and_enable(nn);
1550 }
1551
nfp_net_clone_dp(struct nfp_net * nn)1552 struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
1553 {
1554 struct nfp_net_dp *new;
1555
1556 new = kmalloc(sizeof(*new), GFP_KERNEL);
1557 if (!new)
1558 return NULL;
1559
1560 *new = nn->dp;
1561
1562 new->xsk_pools = kmemdup(new->xsk_pools,
1563 array_size(nn->max_r_vecs,
1564 sizeof(new->xsk_pools)),
1565 GFP_KERNEL);
1566 if (!new->xsk_pools) {
1567 kfree(new);
1568 return NULL;
1569 }
1570
1571 /* Clear things which need to be recomputed */
1572 new->fl_bufsz = 0;
1573 new->tx_rings = NULL;
1574 new->rx_rings = NULL;
1575 new->num_r_vecs = 0;
1576 new->num_stack_tx_rings = 0;
1577 new->txrwb = NULL;
1578 new->txrwb_dma = 0;
1579
1580 return new;
1581 }
1582
nfp_net_free_dp(struct nfp_net_dp * dp)1583 static void nfp_net_free_dp(struct nfp_net_dp *dp)
1584 {
1585 kfree(dp->xsk_pools);
1586 kfree(dp);
1587 }
1588
1589 static int
nfp_net_check_config(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1590 nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
1591 struct netlink_ext_ack *extack)
1592 {
1593 unsigned int r, xsk_min_fl_bufsz;
1594
1595 /* XDP-enabled tests */
1596 if (!dp->xdp_prog)
1597 return 0;
1598 if (dp->fl_bufsz > PAGE_SIZE) {
1599 NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
1600 return -EINVAL;
1601 }
1602 if (dp->num_tx_rings > nn->max_tx_rings) {
1603 NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
1604 return -EINVAL;
1605 }
1606
1607 xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp);
1608 for (r = 0; r < nn->max_r_vecs; r++) {
1609 if (!dp->xsk_pools[r])
1610 continue;
1611
1612 if (xsk_pool_get_rx_frame_size(dp->xsk_pools[r]) < xsk_min_fl_bufsz) {
1613 NL_SET_ERR_MSG_MOD(extack,
1614 "XSK buffer pool chunk size too small");
1615 return -EINVAL;
1616 }
1617 }
1618
1619 return 0;
1620 }
1621
nfp_net_ring_reconfig(struct nfp_net * nn,struct nfp_net_dp * dp,struct netlink_ext_ack * extack)1622 int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
1623 struct netlink_ext_ack *extack)
1624 {
1625 int r, err;
1626
1627 dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
1628
1629 dp->num_stack_tx_rings = dp->num_tx_rings;
1630 if (dp->xdp_prog)
1631 dp->num_stack_tx_rings -= dp->num_rx_rings;
1632
1633 dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
1634
1635 err = nfp_net_check_config(nn, dp, extack);
1636 if (err)
1637 goto exit_free_dp;
1638
1639 if (!netif_running(dp->netdev)) {
1640 nfp_net_dp_swap(nn, dp);
1641 err = 0;
1642 goto exit_free_dp;
1643 }
1644
1645 /* Prepare new rings */
1646 for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
1647 err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
1648 if (err) {
1649 dp->num_r_vecs = r;
1650 goto err_cleanup_vecs;
1651 }
1652 }
1653
1654 err = nfp_net_rx_rings_prepare(nn, dp);
1655 if (err)
1656 goto err_cleanup_vecs;
1657
1658 err = nfp_net_tx_rings_prepare(nn, dp);
1659 if (err)
1660 goto err_free_rx;
1661
1662 /* Stop device, swap in new rings, try to start the firmware */
1663 nfp_net_close_stack(nn);
1664 nfp_net_clear_config_and_disable(nn);
1665
1666 err = nfp_net_dp_swap_enable(nn, dp);
1667 if (err) {
1668 int err2;
1669
1670 nfp_net_clear_config_and_disable(nn);
1671
1672 /* Try with old configuration and old rings */
1673 err2 = nfp_net_dp_swap_enable(nn, dp);
1674 if (err2)
1675 nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
1676 err, err2);
1677 }
1678 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1679 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1680
1681 nfp_net_rx_rings_free(dp);
1682 nfp_net_tx_rings_free(dp);
1683
1684 nfp_net_open_stack(nn);
1685 exit_free_dp:
1686 nfp_net_free_dp(dp);
1687
1688 return err;
1689
1690 err_free_rx:
1691 nfp_net_rx_rings_free(dp);
1692 err_cleanup_vecs:
1693 for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
1694 nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
1695 nfp_net_free_dp(dp);
1696 return err;
1697 }
1698
nfp_net_change_mtu(struct net_device * netdev,int new_mtu)1699 static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
1700 {
1701 struct nfp_net *nn = netdev_priv(netdev);
1702 struct nfp_net_dp *dp;
1703 int err;
1704
1705 err = nfp_app_check_mtu(nn->app, netdev, new_mtu);
1706 if (err)
1707 return err;
1708
1709 dp = nfp_net_clone_dp(nn);
1710 if (!dp)
1711 return -ENOMEM;
1712
1713 dp->mtu = new_mtu;
1714
1715 return nfp_net_ring_reconfig(nn, dp, NULL);
1716 }
1717
1718 static int
nfp_net_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)1719 nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
1720 {
1721 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD;
1722 struct nfp_net *nn = netdev_priv(netdev);
1723 int err;
1724
1725 /* Priority tagged packets with vlan id 0 are processed by the
1726 * NFP as untagged packets
1727 */
1728 if (!vid)
1729 return 0;
1730
1731 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1732 if (err)
1733 return err;
1734
1735 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1736 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1737 ETH_P_8021Q);
1738
1739 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1740 }
1741
1742 static int
nfp_net_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)1743 nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
1744 {
1745 const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL;
1746 struct nfp_net *nn = netdev_priv(netdev);
1747 int err;
1748
1749 /* Priority tagged packets with vlan id 0 are processed by the
1750 * NFP as untagged packets
1751 */
1752 if (!vid)
1753 return 0;
1754
1755 err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ);
1756 if (err)
1757 return err;
1758
1759 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
1760 nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
1761 ETH_P_8021Q);
1762
1763 return nfp_net_mbox_reconfig_and_unlock(nn, cmd);
1764 }
1765
nfp_net_stat64(struct net_device * netdev,struct rtnl_link_stats64 * stats)1766 static void nfp_net_stat64(struct net_device *netdev,
1767 struct rtnl_link_stats64 *stats)
1768 {
1769 struct nfp_net *nn = netdev_priv(netdev);
1770 int r;
1771
1772 /* Collect software stats */
1773 for (r = 0; r < nn->max_r_vecs; r++) {
1774 struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
1775 u64 data[3];
1776 unsigned int start;
1777
1778 do {
1779 start = u64_stats_fetch_begin(&r_vec->rx_sync);
1780 data[0] = r_vec->rx_pkts;
1781 data[1] = r_vec->rx_bytes;
1782 data[2] = r_vec->rx_drops;
1783 } while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
1784 stats->rx_packets += data[0];
1785 stats->rx_bytes += data[1];
1786 stats->rx_dropped += data[2];
1787
1788 do {
1789 start = u64_stats_fetch_begin(&r_vec->tx_sync);
1790 data[0] = r_vec->tx_pkts;
1791 data[1] = r_vec->tx_bytes;
1792 data[2] = r_vec->tx_errors;
1793 } while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
1794 stats->tx_packets += data[0];
1795 stats->tx_bytes += data[1];
1796 stats->tx_errors += data[2];
1797 }
1798
1799 /* Add in device stats */
1800 stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES);
1801 stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS);
1802 stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS);
1803
1804 stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS);
1805 stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS);
1806 }
1807
nfp_net_set_features(struct net_device * netdev,netdev_features_t features)1808 static int nfp_net_set_features(struct net_device *netdev,
1809 netdev_features_t features)
1810 {
1811 netdev_features_t changed = netdev->features ^ features;
1812 struct nfp_net *nn = netdev_priv(netdev);
1813 u32 new_ctrl;
1814 int err;
1815
1816 /* Assume this is not called with features we have not advertised */
1817
1818 new_ctrl = nn->dp.ctrl;
1819
1820 if (changed & NETIF_F_RXCSUM) {
1821 if (features & NETIF_F_RXCSUM)
1822 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
1823 else
1824 new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
1825 }
1826
1827 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
1828 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
1829 new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
1830 else
1831 new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
1832 }
1833
1834 if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1835 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1836 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
1837 NFP_NET_CFG_CTRL_LSO;
1838 else
1839 new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
1840 }
1841
1842 if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
1843 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1844 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
1845 NFP_NET_CFG_CTRL_RXVLAN;
1846 else
1847 new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY;
1848 }
1849
1850 if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
1851 if (features & NETIF_F_HW_VLAN_CTAG_TX)
1852 new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
1853 NFP_NET_CFG_CTRL_TXVLAN;
1854 else
1855 new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY;
1856 }
1857
1858 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
1859 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1860 new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
1861 else
1862 new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
1863 }
1864
1865 if (changed & NETIF_F_HW_VLAN_STAG_RX) {
1866 if (features & NETIF_F_HW_VLAN_STAG_RX)
1867 new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
1868 else
1869 new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
1870 }
1871
1872 if (changed & NETIF_F_SG) {
1873 if (features & NETIF_F_SG)
1874 new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
1875 else
1876 new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
1877 }
1878
1879 err = nfp_port_set_features(netdev, features);
1880 if (err)
1881 return err;
1882
1883 nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
1884 netdev->features, features, changed);
1885
1886 if (new_ctrl == nn->dp.ctrl)
1887 return 0;
1888
1889 nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl);
1890 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
1891 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
1892 if (err)
1893 return err;
1894
1895 nn->dp.ctrl = new_ctrl;
1896
1897 return 0;
1898 }
1899
1900 static netdev_features_t
nfp_net_fix_features(struct net_device * netdev,netdev_features_t features)1901 nfp_net_fix_features(struct net_device *netdev,
1902 netdev_features_t features)
1903 {
1904 if ((features & NETIF_F_HW_VLAN_CTAG_RX) &&
1905 (features & NETIF_F_HW_VLAN_STAG_RX)) {
1906 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
1907 features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1908 netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
1909 netdev_warn(netdev,
1910 "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n");
1911 } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) {
1912 features &= ~NETIF_F_HW_VLAN_STAG_RX;
1913 netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX;
1914 netdev_warn(netdev,
1915 "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n");
1916 }
1917 }
1918 return features;
1919 }
1920
1921 static netdev_features_t
nfp_net_features_check(struct sk_buff * skb,struct net_device * dev,netdev_features_t features)1922 nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
1923 netdev_features_t features)
1924 {
1925 u8 l4_hdr;
1926
1927 /* We can't do TSO over double tagged packets (802.1AD) */
1928 features &= vlan_features_check(skb, features);
1929
1930 if (!skb->encapsulation)
1931 return features;
1932
1933 /* Ensure that inner L4 header offset fits into TX descriptor field */
1934 if (skb_is_gso(skb)) {
1935 u32 hdrlen;
1936
1937 hdrlen = skb_inner_tcp_all_headers(skb);
1938
1939 /* Assume worst case scenario of having longest possible
1940 * metadata prepend - 8B
1941 */
1942 if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8))
1943 features &= ~NETIF_F_GSO_MASK;
1944 }
1945
1946 if (xfrm_offload(skb))
1947 return features;
1948
1949 /* VXLAN/GRE check */
1950 switch (vlan_get_protocol(skb)) {
1951 case htons(ETH_P_IP):
1952 l4_hdr = ip_hdr(skb)->protocol;
1953 break;
1954 case htons(ETH_P_IPV6):
1955 l4_hdr = ipv6_hdr(skb)->nexthdr;
1956 break;
1957 default:
1958 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1959 }
1960
1961 if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
1962 skb->inner_protocol != htons(ETH_P_TEB) ||
1963 (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
1964 (l4_hdr == IPPROTO_UDP &&
1965 (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
1966 sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
1967 return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1968
1969 return features;
1970 }
1971
1972 static int
nfp_net_get_phys_port_name(struct net_device * netdev,char * name,size_t len)1973 nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
1974 {
1975 struct nfp_net *nn = netdev_priv(netdev);
1976 int n;
1977
1978 /* If port is defined, devlink_port is registered and devlink core
1979 * is taking care of name formatting.
1980 */
1981 if (nn->port)
1982 return -EOPNOTSUPP;
1983
1984 if (nn->dp.is_vf || nn->vnic_no_name)
1985 return -EOPNOTSUPP;
1986
1987 n = snprintf(name, len, "n%d", nn->id);
1988 if (n >= len)
1989 return -EINVAL;
1990
1991 return 0;
1992 }
1993
nfp_net_xdp_setup_drv(struct nfp_net * nn,struct netdev_bpf * bpf)1994 static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf)
1995 {
1996 struct bpf_prog *prog = bpf->prog;
1997 struct nfp_net_dp *dp;
1998 int err;
1999
2000 if (!prog == !nn->dp.xdp_prog) {
2001 WRITE_ONCE(nn->dp.xdp_prog, prog);
2002 xdp_attachment_setup(&nn->xdp, bpf);
2003 return 0;
2004 }
2005
2006 dp = nfp_net_clone_dp(nn);
2007 if (!dp)
2008 return -ENOMEM;
2009
2010 dp->xdp_prog = prog;
2011 dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
2012 dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
2013 dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
2014
2015 /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
2016 err = nfp_net_ring_reconfig(nn, dp, bpf->extack);
2017 if (err)
2018 return err;
2019
2020 xdp_attachment_setup(&nn->xdp, bpf);
2021 return 0;
2022 }
2023
nfp_net_xdp_setup_hw(struct nfp_net * nn,struct netdev_bpf * bpf)2024 static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf)
2025 {
2026 int err;
2027
2028 err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack);
2029 if (err)
2030 return err;
2031
2032 xdp_attachment_setup(&nn->xdp_hw, bpf);
2033 return 0;
2034 }
2035
nfp_net_xdp(struct net_device * netdev,struct netdev_bpf * xdp)2036 static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp)
2037 {
2038 struct nfp_net *nn = netdev_priv(netdev);
2039
2040 switch (xdp->command) {
2041 case XDP_SETUP_PROG:
2042 return nfp_net_xdp_setup_drv(nn, xdp);
2043 case XDP_SETUP_PROG_HW:
2044 return nfp_net_xdp_setup_hw(nn, xdp);
2045 case XDP_SETUP_XSK_POOL:
2046 return nfp_net_xsk_setup_pool(netdev, xdp->xsk.pool,
2047 xdp->xsk.queue_id);
2048 default:
2049 return nfp_app_bpf(nn->app, nn, xdp);
2050 }
2051 }
2052
nfp_net_set_mac_address(struct net_device * netdev,void * addr)2053 static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
2054 {
2055 struct nfp_net *nn = netdev_priv(netdev);
2056 struct sockaddr *saddr = addr;
2057 int err;
2058
2059 err = eth_prepare_mac_addr_change(netdev, addr);
2060 if (err)
2061 return err;
2062
2063 nfp_net_write_mac_addr(nn, saddr->sa_data);
2064
2065 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
2066 if (err)
2067 return err;
2068
2069 eth_commit_mac_addr_change(netdev, addr);
2070
2071 return 0;
2072 }
2073
nfp_net_bridge_getlink(struct sk_buff * skb,u32 pid,u32 seq,struct net_device * dev,u32 filter_mask,int nlflags)2074 static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2075 struct net_device *dev, u32 filter_mask,
2076 int nlflags)
2077 {
2078 struct nfp_net *nn = netdev_priv(dev);
2079 u16 mode;
2080
2081 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2082 return -EOPNOTSUPP;
2083
2084 mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ?
2085 BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB;
2086
2087 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0,
2088 nlflags, filter_mask, NULL);
2089 }
2090
nfp_net_bridge_setlink(struct net_device * dev,struct nlmsghdr * nlh,u16 flags,struct netlink_ext_ack * extack)2091 static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
2092 u16 flags, struct netlink_ext_ack *extack)
2093 {
2094 struct nfp_net *nn = netdev_priv(dev);
2095 struct nlattr *attr, *br_spec;
2096 int rem, err;
2097 u32 new_ctrl;
2098 u16 mode;
2099
2100 if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA))
2101 return -EOPNOTSUPP;
2102
2103 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
2104 if (!br_spec)
2105 return -EINVAL;
2106
2107 nla_for_each_nested(attr, br_spec, rem) {
2108 if (nla_type(attr) != IFLA_BRIDGE_MODE)
2109 continue;
2110
2111 new_ctrl = nn->dp.ctrl;
2112 mode = nla_get_u16(attr);
2113 if (mode == BRIDGE_MODE_VEPA)
2114 new_ctrl |= NFP_NET_CFG_CTRL_VEPA;
2115 else if (mode == BRIDGE_MODE_VEB)
2116 new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA;
2117 else
2118 return -EOPNOTSUPP;
2119
2120 if (new_ctrl == nn->dp.ctrl)
2121 return 0;
2122
2123 nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
2124 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
2125 if (!err)
2126 nn->dp.ctrl = new_ctrl;
2127
2128 return err;
2129 }
2130
2131 return -EINVAL;
2132 }
2133
2134 const struct net_device_ops nfp_nfd3_netdev_ops = {
2135 .ndo_init = nfp_app_ndo_init,
2136 .ndo_uninit = nfp_app_ndo_uninit,
2137 .ndo_open = nfp_net_netdev_open,
2138 .ndo_stop = nfp_net_netdev_close,
2139 .ndo_start_xmit = nfp_net_tx,
2140 .ndo_get_stats64 = nfp_net_stat64,
2141 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2142 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2143 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2144 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2145 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2146 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2147 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2148 .ndo_get_vf_config = nfp_app_get_vf_config,
2149 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2150 .ndo_setup_tc = nfp_port_setup_tc,
2151 .ndo_tx_timeout = nfp_net_tx_timeout,
2152 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2153 .ndo_change_mtu = nfp_net_change_mtu,
2154 .ndo_set_mac_address = nfp_net_set_mac_address,
2155 .ndo_set_features = nfp_net_set_features,
2156 .ndo_fix_features = nfp_net_fix_features,
2157 .ndo_features_check = nfp_net_features_check,
2158 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2159 .ndo_bpf = nfp_net_xdp,
2160 .ndo_xsk_wakeup = nfp_net_xsk_wakeup,
2161 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2162 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2163 };
2164
2165 const struct net_device_ops nfp_nfdk_netdev_ops = {
2166 .ndo_init = nfp_app_ndo_init,
2167 .ndo_uninit = nfp_app_ndo_uninit,
2168 .ndo_open = nfp_net_netdev_open,
2169 .ndo_stop = nfp_net_netdev_close,
2170 .ndo_start_xmit = nfp_net_tx,
2171 .ndo_get_stats64 = nfp_net_stat64,
2172 .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
2173 .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
2174 .ndo_set_vf_mac = nfp_app_set_vf_mac,
2175 .ndo_set_vf_vlan = nfp_app_set_vf_vlan,
2176 .ndo_set_vf_rate = nfp_app_set_vf_rate,
2177 .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
2178 .ndo_set_vf_trust = nfp_app_set_vf_trust,
2179 .ndo_get_vf_config = nfp_app_get_vf_config,
2180 .ndo_set_vf_link_state = nfp_app_set_vf_link_state,
2181 .ndo_setup_tc = nfp_port_setup_tc,
2182 .ndo_tx_timeout = nfp_net_tx_timeout,
2183 .ndo_set_rx_mode = nfp_net_set_rx_mode,
2184 .ndo_change_mtu = nfp_net_change_mtu,
2185 .ndo_set_mac_address = nfp_net_set_mac_address,
2186 .ndo_set_features = nfp_net_set_features,
2187 .ndo_fix_features = nfp_net_fix_features,
2188 .ndo_features_check = nfp_net_features_check,
2189 .ndo_get_phys_port_name = nfp_net_get_phys_port_name,
2190 .ndo_bpf = nfp_net_xdp,
2191 .ndo_bridge_getlink = nfp_net_bridge_getlink,
2192 .ndo_bridge_setlink = nfp_net_bridge_setlink,
2193 };
2194
nfp_udp_tunnel_sync(struct net_device * netdev,unsigned int table)2195 static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)
2196 {
2197 struct nfp_net *nn = netdev_priv(netdev);
2198 int i;
2199
2200 BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
2201 for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) {
2202 struct udp_tunnel_info ti0, ti1;
2203
2204 udp_tunnel_nic_get_port(netdev, table, i, &ti0);
2205 udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1);
2206
2207 nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port),
2208 be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port));
2209 }
2210
2211 return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN);
2212 }
2213
2214 static const struct udp_tunnel_nic_info nfp_udp_tunnels = {
2215 .sync_table = nfp_udp_tunnel_sync,
2216 .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP |
2217 UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
2218 .tables = {
2219 {
2220 .n_entries = NFP_NET_N_VXLAN_PORTS,
2221 .tunnel_types = UDP_TUNNEL_TYPE_VXLAN,
2222 },
2223 },
2224 };
2225
2226 /**
2227 * nfp_net_info() - Print general info about the NIC
2228 * @nn: NFP Net device to reconfigure
2229 */
nfp_net_info(struct nfp_net * nn)2230 void nfp_net_info(struct nfp_net *nn)
2231 {
2232 nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
2233 nn->dp.is_vf ? "VF " : "",
2234 nn->dp.num_tx_rings, nn->max_tx_rings,
2235 nn->dp.num_rx_rings, nn->max_rx_rings);
2236 nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
2237 nn->fw_ver.extend, nn->fw_ver.class,
2238 nn->fw_ver.major, nn->fw_ver.minor,
2239 nn->max_mtu);
2240 nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
2241 nn->cap,
2242 nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
2243 nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
2244 nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
2245 nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
2246 nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
2247 nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
2248 nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
2249 nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "",
2250 nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "",
2251 nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "",
2252 nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
2253 nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
2254 nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "",
2255 nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
2256 nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
2257 nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
2258 nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
2259 nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
2260 nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
2261 nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "",
2262 nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "",
2263 nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
2264 nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "",
2265 nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
2266 "RXCSUM_COMPLETE " : "",
2267 nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
2268 nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER ? "MULTICAST_FILTER " : "",
2269 nfp_app_extra_cap(nn->app, nn));
2270 }
2271
2272 /**
2273 * nfp_net_alloc() - Allocate netdev and related structure
2274 * @pdev: PCI device
2275 * @dev_info: NFP ASIC params
2276 * @ctrl_bar: PCI IOMEM with vNIC config memory
2277 * @needs_netdev: Whether to allocate a netdev for this vNIC
2278 * @max_tx_rings: Maximum number of TX rings supported by device
2279 * @max_rx_rings: Maximum number of RX rings supported by device
2280 *
2281 * This function allocates a netdev device and fills in the initial
2282 * part of the @struct nfp_net structure. In case of control device
2283 * nfp_net structure is allocated without the netdev.
2284 *
2285 * Return: NFP Net device structure, or ERR_PTR on error.
2286 */
2287 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)2288 nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
2289 void __iomem *ctrl_bar, bool needs_netdev,
2290 unsigned int max_tx_rings, unsigned int max_rx_rings)
2291 {
2292 u64 dma_mask = dma_get_mask(&pdev->dev);
2293 struct nfp_net *nn;
2294 int err;
2295
2296 if (needs_netdev) {
2297 struct net_device *netdev;
2298
2299 netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
2300 max_tx_rings, max_rx_rings);
2301 if (!netdev)
2302 return ERR_PTR(-ENOMEM);
2303
2304 SET_NETDEV_DEV(netdev, &pdev->dev);
2305 nn = netdev_priv(netdev);
2306 nn->dp.netdev = netdev;
2307 } else {
2308 nn = vzalloc(sizeof(*nn));
2309 if (!nn)
2310 return ERR_PTR(-ENOMEM);
2311 }
2312
2313 nn->dp.dev = &pdev->dev;
2314 nn->dp.ctrl_bar = ctrl_bar;
2315 nn->dev_info = dev_info;
2316 nn->pdev = pdev;
2317 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
2318
2319 switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) {
2320 case NFP_NET_CFG_VERSION_DP_NFD3:
2321 nn->dp.ops = &nfp_nfd3_ops;
2322 break;
2323 case NFP_NET_CFG_VERSION_DP_NFDK:
2324 if (nn->fw_ver.major < 5) {
2325 dev_err(&pdev->dev,
2326 "NFDK must use ABI 5 or newer, found: %d\n",
2327 nn->fw_ver.major);
2328 err = -EINVAL;
2329 goto err_free_nn;
2330 }
2331 nn->dp.ops = &nfp_nfdk_ops;
2332 break;
2333 default:
2334 err = -EINVAL;
2335 goto err_free_nn;
2336 }
2337
2338 if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) {
2339 dev_err(&pdev->dev,
2340 "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n",
2341 nn->dp.ops->dma_mask, dma_mask);
2342 err = -EINVAL;
2343 goto err_free_nn;
2344 }
2345
2346 nn->max_tx_rings = max_tx_rings;
2347 nn->max_rx_rings = max_rx_rings;
2348
2349 nn->dp.num_tx_rings = min_t(unsigned int,
2350 max_tx_rings, num_online_cpus());
2351 nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
2352 netif_get_num_default_rss_queues());
2353
2354 nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
2355 nn->dp.num_r_vecs = min_t(unsigned int,
2356 nn->dp.num_r_vecs, num_online_cpus());
2357 nn->max_r_vecs = nn->dp.num_r_vecs;
2358
2359 nn->dp.xsk_pools = kcalloc(nn->max_r_vecs, sizeof(nn->dp.xsk_pools),
2360 GFP_KERNEL);
2361 if (!nn->dp.xsk_pools) {
2362 err = -ENOMEM;
2363 goto err_free_nn;
2364 }
2365
2366 nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
2367 nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
2368
2369 sema_init(&nn->bar_lock, 1);
2370
2371 spin_lock_init(&nn->reconfig_lock);
2372 spin_lock_init(&nn->link_status_lock);
2373
2374 timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0);
2375
2376 err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
2377 &nn->tlv_caps);
2378 if (err)
2379 goto err_free_nn;
2380
2381 err = nfp_ccm_mbox_alloc(nn);
2382 if (err)
2383 goto err_free_nn;
2384
2385 return nn;
2386
2387 err_free_nn:
2388 if (nn->dp.netdev)
2389 free_netdev(nn->dp.netdev);
2390 else
2391 vfree(nn);
2392 return ERR_PTR(err);
2393 }
2394
2395 /**
2396 * nfp_net_free() - Undo what @nfp_net_alloc() did
2397 * @nn: NFP Net device to reconfigure
2398 */
nfp_net_free(struct nfp_net * nn)2399 void nfp_net_free(struct nfp_net *nn)
2400 {
2401 WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted);
2402 nfp_ccm_mbox_free(nn);
2403
2404 kfree(nn->dp.xsk_pools);
2405 if (nn->dp.netdev)
2406 free_netdev(nn->dp.netdev);
2407 else
2408 vfree(nn);
2409 }
2410
2411 /**
2412 * nfp_net_rss_key_sz() - Get current size of the RSS key
2413 * @nn: NFP Net device instance
2414 *
2415 * Return: size of the RSS key for currently selected hash function.
2416 */
nfp_net_rss_key_sz(struct nfp_net * nn)2417 unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
2418 {
2419 switch (nn->rss_hfunc) {
2420 case ETH_RSS_HASH_TOP:
2421 return NFP_NET_CFG_RSS_KEY_SZ;
2422 case ETH_RSS_HASH_XOR:
2423 return 0;
2424 case ETH_RSS_HASH_CRC32:
2425 return 4;
2426 }
2427
2428 nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
2429 return 0;
2430 }
2431
2432 /**
2433 * nfp_net_rss_init() - Set the initial RSS parameters
2434 * @nn: NFP Net device to reconfigure
2435 */
nfp_net_rss_init(struct nfp_net * nn)2436 static void nfp_net_rss_init(struct nfp_net *nn)
2437 {
2438 unsigned long func_bit, rss_cap_hfunc;
2439 u32 reg;
2440
2441 /* Read the RSS function capability and select first supported func */
2442 reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
2443 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
2444 if (!rss_cap_hfunc)
2445 rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
2446 NFP_NET_CFG_RSS_TOEPLITZ);
2447
2448 func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
2449 if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
2450 dev_warn(nn->dp.dev,
2451 "Bad RSS config, defaulting to Toeplitz hash\n");
2452 func_bit = ETH_RSS_HASH_TOP_BIT;
2453 }
2454 nn->rss_hfunc = 1 << func_bit;
2455
2456 netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
2457
2458 nfp_net_rss_init_itbl(nn);
2459
2460 /* Enable IPv4/IPv6 TCP by default */
2461 nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
2462 NFP_NET_CFG_RSS_IPV6_TCP |
2463 NFP_NET_CFG_RSS_IPV4_UDP |
2464 NFP_NET_CFG_RSS_IPV6_UDP |
2465 FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
2466 NFP_NET_CFG_RSS_MASK;
2467 }
2468
2469 /**
2470 * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
2471 * @nn: NFP Net device to reconfigure
2472 */
nfp_net_irqmod_init(struct nfp_net * nn)2473 static void nfp_net_irqmod_init(struct nfp_net *nn)
2474 {
2475 nn->rx_coalesce_usecs = 50;
2476 nn->rx_coalesce_max_frames = 64;
2477 nn->tx_coalesce_usecs = 50;
2478 nn->tx_coalesce_max_frames = 64;
2479
2480 nn->rx_coalesce_adapt_on = true;
2481 nn->tx_coalesce_adapt_on = true;
2482 }
2483
nfp_net_netdev_init(struct nfp_net * nn)2484 static void nfp_net_netdev_init(struct nfp_net *nn)
2485 {
2486 struct net_device *netdev = nn->dp.netdev;
2487
2488 nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
2489
2490 netdev->mtu = nn->dp.mtu;
2491
2492 /* Advertise/enable offloads based on capabilities
2493 *
2494 * Note: netdev->features show the currently enabled features
2495 * and netdev->hw_features advertises which features are
2496 * supported. By default we enable most features.
2497 */
2498 if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
2499 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2500
2501 netdev->hw_features = NETIF_F_HIGHDMA;
2502 if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
2503 netdev->hw_features |= NETIF_F_RXCSUM;
2504 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
2505 }
2506 if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
2507 netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2508 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
2509 }
2510 if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
2511 netdev->hw_features |= NETIF_F_SG;
2512 nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
2513 }
2514 if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
2515 nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2516 netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2517 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
2518 NFP_NET_CFG_CTRL_LSO;
2519 }
2520 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
2521 netdev->hw_features |= NETIF_F_RXHASH;
2522
2523 #ifdef CONFIG_NFP_NET_IPSEC
2524 if (nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC)
2525 netdev->hw_features |= NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM;
2526 #endif
2527
2528 if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) {
2529 if (nn->cap & NFP_NET_CFG_CTRL_LSO) {
2530 netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
2531 NETIF_F_GSO_UDP_TUNNEL_CSUM |
2532 NETIF_F_GSO_PARTIAL;
2533 netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
2534 }
2535 netdev->udp_tunnel_nic_info = &nfp_udp_tunnels;
2536 nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;
2537 }
2538 if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
2539 if (nn->cap & NFP_NET_CFG_CTRL_LSO)
2540 netdev->hw_features |= NETIF_F_GSO_GRE;
2541 nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE;
2542 }
2543 if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE))
2544 netdev->hw_enc_features = netdev->hw_features;
2545
2546 netdev->vlan_features = netdev->hw_features;
2547
2548 if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) {
2549 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
2550 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?:
2551 NFP_NET_CFG_CTRL_RXVLAN;
2552 }
2553 if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) {
2554 if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
2555 nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
2556 } else {
2557 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
2558 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?:
2559 NFP_NET_CFG_CTRL_TXVLAN;
2560 }
2561 }
2562 if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
2563 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2564 nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
2565 }
2566 if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) {
2567 netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
2568 nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ;
2569 }
2570
2571 netdev->features = netdev->hw_features;
2572
2573 if (nfp_app_has_tc(nn->app) && nn->port)
2574 netdev->hw_features |= NETIF_F_HW_TC;
2575
2576 /* C-Tag strip and S-Tag strip can't be supported simultaneously,
2577 * so enable C-Tag strip and disable S-Tag strip by default.
2578 */
2579 netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX;
2580 nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ;
2581
2582 netdev->xdp_features = NETDEV_XDP_ACT_BASIC;
2583 if (nn->app && nn->app->type->id == NFP_APP_BPF_NIC)
2584 netdev->xdp_features |= NETDEV_XDP_ACT_HW_OFFLOAD;
2585
2586 /* Finalise the netdev setup */
2587 switch (nn->dp.ops->version) {
2588 case NFP_NFD_VER_NFD3:
2589 netdev->netdev_ops = &nfp_nfd3_netdev_ops;
2590 netdev->xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY;
2591 netdev->xdp_features |= NETDEV_XDP_ACT_REDIRECT;
2592 break;
2593 case NFP_NFD_VER_NFDK:
2594 netdev->netdev_ops = &nfp_nfdk_netdev_ops;
2595 break;
2596 }
2597
2598 netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
2599
2600 /* MTU range: 68 - hw-specific max */
2601 netdev->min_mtu = ETH_MIN_MTU;
2602 netdev->max_mtu = nn->max_mtu;
2603
2604 netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
2605
2606 netif_carrier_off(netdev);
2607
2608 nfp_net_set_ethtool_ops(netdev);
2609 }
2610
nfp_net_read_caps(struct nfp_net * nn)2611 static int nfp_net_read_caps(struct nfp_net *nn)
2612 {
2613 /* Get some of the read-only fields from the BAR */
2614 nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
2615 nn->cap_w1 = nn_readl(nn, NFP_NET_CFG_CAP_WORD1);
2616 nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
2617
2618 /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
2619 * we allow use of non-chained metadata if RSS(v1) is the only
2620 * advertised capability requiring metadata.
2621 */
2622 nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
2623 !nn->dp.netdev ||
2624 !(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
2625 nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
2626 /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where
2627 * it has the same meaning as RSSv2.
2628 */
2629 if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
2630 nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
2631
2632 /* Determine RX packet/metadata boundary offset */
2633 if (nn->fw_ver.major >= 2) {
2634 u32 reg;
2635
2636 reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
2637 if (reg > NFP_NET_MAX_PREPEND) {
2638 nn_err(nn, "Invalid rx offset: %d\n", reg);
2639 return -EINVAL;
2640 }
2641 nn->dp.rx_offset = reg;
2642 } else {
2643 nn->dp.rx_offset = NFP_NET_RX_OFFSET;
2644 }
2645
2646 /* Mask out NFD-version-specific features */
2647 nn->cap &= nn->dp.ops->cap_mask;
2648
2649 /* For control vNICs mask out the capabilities app doesn't want. */
2650 if (!nn->dp.netdev)
2651 nn->cap &= nn->app->type->ctrl_cap_mask;
2652
2653 return 0;
2654 }
2655
2656 /**
2657 * nfp_net_init() - Initialise/finalise the nfp_net structure
2658 * @nn: NFP Net device structure
2659 *
2660 * Return: 0 on success or negative errno on error.
2661 */
nfp_net_init(struct nfp_net * nn)2662 int nfp_net_init(struct nfp_net *nn)
2663 {
2664 int err;
2665
2666 nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
2667
2668 err = nfp_net_read_caps(nn);
2669 if (err)
2670 return err;
2671
2672 /* Set default MTU and Freelist buffer size */
2673 if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) {
2674 nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu);
2675 } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) {
2676 nn->dp.mtu = nn->max_mtu;
2677 } else {
2678 nn->dp.mtu = NFP_NET_DEFAULT_MTU;
2679 }
2680 nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
2681
2682 if (nfp_app_ctrl_uses_data_vnics(nn->app))
2683 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA;
2684
2685 if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
2686 nfp_net_rss_init(nn);
2687 nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
2688 NFP_NET_CFG_CTRL_RSS;
2689 }
2690
2691 /* Allow L2 Broadcast and Multicast through by default, if supported */
2692 if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
2693 nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
2694
2695 /* Allow IRQ moderation, if supported */
2696 if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
2697 nfp_net_irqmod_init(nn);
2698 nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
2699 }
2700
2701 /* Enable TX pointer writeback, if supported */
2702 if (nn->cap & NFP_NET_CFG_CTRL_TXRWB)
2703 nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB;
2704
2705 if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER)
2706 nn->dp.ctrl_w1 |= NFP_NET_CFG_CTRL_MCAST_FILTER;
2707
2708 /* Stash the re-configuration queue away. First odd queue in TX Bar */
2709 nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
2710
2711 /* Make sure the FW knows the netdev is supposed to be disabled here */
2712 nn_writel(nn, NFP_NET_CFG_CTRL, 0);
2713 nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
2714 nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
2715 nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, 0);
2716 err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
2717 NFP_NET_CFG_UPDATE_GEN);
2718 if (err)
2719 return err;
2720
2721 if (nn->dp.netdev) {
2722 nfp_net_netdev_init(nn);
2723
2724 err = nfp_ccm_mbox_init(nn);
2725 if (err)
2726 return err;
2727
2728 err = nfp_net_tls_init(nn);
2729 if (err)
2730 goto err_clean_mbox;
2731
2732 nfp_net_ipsec_init(nn);
2733 }
2734
2735 nfp_net_vecs_init(nn);
2736
2737 if (!nn->dp.netdev)
2738 return 0;
2739
2740 spin_lock_init(&nn->mbox_amsg.lock);
2741 INIT_LIST_HEAD(&nn->mbox_amsg.list);
2742 INIT_WORK(&nn->mbox_amsg.work, nfp_net_mbox_amsg_work);
2743
2744 return register_netdev(nn->dp.netdev);
2745
2746 err_clean_mbox:
2747 nfp_ccm_mbox_clean(nn);
2748 return err;
2749 }
2750
2751 /**
2752 * nfp_net_clean() - Undo what nfp_net_init() did.
2753 * @nn: NFP Net device structure
2754 */
nfp_net_clean(struct nfp_net * nn)2755 void nfp_net_clean(struct nfp_net *nn)
2756 {
2757 if (!nn->dp.netdev)
2758 return;
2759
2760 unregister_netdev(nn->dp.netdev);
2761 nfp_net_ipsec_clean(nn);
2762 nfp_ccm_mbox_clean(nn);
2763 flush_work(&nn->mbox_amsg.work);
2764 nfp_net_reconfig_wait_posted(nn);
2765 }
2766