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 | */ |
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(addr: ctrl_bar + NFP_NET_CFG_VERSION); |
69 | put_unaligned_le32(val: reg, p: fw_ver); |
70 | } |
71 | |
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 | */ |
84 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) |
85 | { |
86 | nn_writel(nn, NFP_NET_CFG_UPDATE, val: update); |
87 | /* ensure update is written before pinging HW */ |
88 | nn_pci_flush(nn); |
89 | nfp_qcp_wr_ptr_add(q: nn->qcp_cfg, val: 1); |
90 | nn->reconfig_in_progress_update = update; |
91 | } |
92 | |
93 | /* Pass 0 as update to run posted reconfigs. */ |
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(timer: &nn->reconfig_timer, expires: jiffies + NFP_NET_POLL_TIMEOUT * HZ); |
103 | } |
104 | |
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 | |
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, last_check: false)) |
137 | return false; |
138 | udelay(4); |
139 | } |
140 | |
141 | while (!nfp_net_reconfig_check_done(nn, last_check: timed_out)) { |
142 | usleep_range(min: 250, max: 500); |
143 | timed_out = time_is_before_eq_jiffies(deadline); |
144 | } |
145 | |
146 | return timed_out; |
147 | } |
148 | |
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 | |
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(lock: &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, last_check: true); |
174 | |
175 | if (nn->reconfig_posted) |
176 | nfp_net_reconfig_start_async(nn, update: 0); |
177 | done: |
178 | spin_unlock_bh(lock: &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 | */ |
190 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) |
191 | { |
192 | spin_lock_bh(lock: &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, last_check: false)) |
203 | nfp_net_reconfig_start_async(nn, update); |
204 | else |
205 | nn->reconfig_posted |= update; |
206 | done: |
207 | spin_unlock_bh(lock: &nn->reconfig_lock); |
208 | } |
209 | |
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(lock: &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(lock: &nn->reconfig_lock); |
228 | |
229 | if (cancelled_timer) { |
230 | del_timer_sync(timer: &nn->reconfig_timer); |
231 | nfp_net_reconfig_wait(nn, deadline: 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, update: pre_posted_requests); |
237 | nfp_net_reconfig_wait(nn, deadline: jiffies + HZ * NFP_NET_POLL_TIMEOUT); |
238 | } |
239 | } |
240 | |
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(lock: &nn->reconfig_lock); |
246 | nn->reconfig_sync_present = false; |
247 | spin_unlock_bh(lock: &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 | */ |
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, deadline: jiffies + HZ * NFP_NET_POLL_TIMEOUT); |
269 | |
270 | spin_lock_bh(lock: &nn->reconfig_lock); |
271 | |
272 | if (nn->reconfig_posted) |
273 | nfp_net_reconfig_start_async(nn, update: 0); |
274 | |
275 | nn->reconfig_sync_present = false; |
276 | |
277 | spin_unlock_bh(lock: &nn->reconfig_lock); |
278 | |
279 | return ret; |
280 | } |
281 | |
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 | |
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 | */ |
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, off: mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, val: 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, off: mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); |
328 | } |
329 | |
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, off: mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, val: mbox_cmd); |
335 | |
336 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX); |
337 | } |
338 | |
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, off: mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); |
346 | } |
347 | |
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 |
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(dev: pdev, entries: irq_entries, |
380 | minvec: min_irqs, maxvec: 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 |
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 | */ |
431 | void nfp_net_irqs_disable(struct pci_dev *pdev) |
432 | { |
433 | pci_disable_msix(dev: 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 | */ |
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(n: &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 | |
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(t: &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 | */ |
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(nr: NFP_PORT_CHANGED, addr: &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(dev: nn->dp.netdev); |
498 | netdev_info(dev: nn->dp.netdev, format: "NIC Link is Up\n" ); |
499 | } else { |
500 | netif_carrier_off(dev: nn->dp.netdev); |
501 | netdev_info(dev: nn->dp.netdev, format: "NIC Link is Down\n" ); |
502 | } |
503 | out: |
504 | spin_unlock_irqrestore(lock: &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 | */ |
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_nr: 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 | */ |
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 |
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(buf: name, size: name_sz, fmt: format, nfp_net_name(nn)); |
565 | err = request_irq(irq: entry->vector, handler, flags: 0, name, dev: 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, off: ctrl_offset, val: entry->entry); |
572 | nfp_net_irq_unmask(nn, entry_nr: 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 | */ |
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, off: ctrl_offset, val: 0xff); |
587 | nn_pci_flush(nn); |
588 | free_irq(nn->irq_entries[vector_idx].vector, nn); |
589 | } |
590 | |
591 | struct sk_buff * |
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(sk: skb->sk, direction: TLS_OFFLOAD_CTX_DIR_TX); |
609 | resync_pending = tls_offload_tx_resync_pending(sk: 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(syncp: &r_vec->tx_sync); |
616 | r_vec->tls_tx_fallback++; |
617 | u64_stats_update_end(syncp: &r_vec->tx_sync); |
618 | |
619 | nskb = tls_encrypt_skb(skb); |
620 | if (!nskb) { |
621 | u64_stats_update_begin(syncp: &r_vec->tx_sync); |
622 | r_vec->tls_tx_no_fallback++; |
623 | u64_stats_update_end(syncp: &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(syncp: &r_vec->tx_sync); |
633 | r_vec->tx_errors++; |
634 | u64_stats_update_end(syncp: &r_vec->tx_sync); |
635 | dev_kfree_skb_any(skb: 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(sk: nskb->sk, got_seq: seq, |
642 | exp_seq: ntls->next_seq); |
643 | |
644 | *nr_frags = 0; |
645 | return nskb; |
646 | } |
647 | |
648 | if (datalen) { |
649 | u64_stats_update_begin(syncp: &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(syncp: &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 | |
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(sk: skb->sk, direction: 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 | |
685 | static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
686 | { |
687 | struct nfp_net *nn = netdev_priv(dev: netdev); |
688 | |
689 | nn_warn(nn, "TX watchdog timeout on ring: %u\n" , txqueue); |
690 | } |
691 | |
692 | /* Receive processing */ |
693 | static unsigned int |
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 | |
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 | |
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 | */ |
738 | static void nfp_net_vecs_init(struct nfp_net *nn) |
739 | { |
740 | int numa_node = dev_to_node(dev: &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(list: &r_vec->queue); |
763 | spin_lock_init(&r_vec->lock); |
764 | tasklet_setup(t: &r_vec->tasklet, callback: nn->dp.ops->ctrl_poll); |
765 | tasklet_disable(t: &r_vec->tasklet); |
766 | } |
767 | |
768 | cpumask_set_cpu(cpu: cpumask_local_spread(i: r, node: numa_node), dstp: &r_vec->affinity_mask); |
769 | } |
770 | } |
771 | |
772 | static void |
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(dev: dp->netdev, napi: &r_vec->napi, |
777 | poll: nfp_net_has_xsk_pool_slow(dp, qid: idx) ? dp->ops->xsk_poll : dp->ops->poll); |
778 | else |
779 | tasklet_enable(t: &r_vec->tasklet); |
780 | } |
781 | |
782 | static void |
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(napi: &r_vec->napi); |
787 | else |
788 | tasklet_disable(t: &r_vec->tasklet); |
789 | } |
790 | |
791 | static void |
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, qid: 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(pool: r_vec->xsk_pool, |
807 | rxq: &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 |
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(dp: &nn->dp, r_vec, idx); |
821 | |
822 | snprintf(buf: r_vec->name, size: sizeof(r_vec->name), |
823 | fmt: "%s-rxtx-%d" , nfp_net_name(nn), idx); |
824 | err = request_irq(irq: r_vec->irq_vector, handler: r_vec->handler, flags: 0, name: r_vec->name, |
825 | dev: r_vec); |
826 | if (err) { |
827 | nfp_net_napi_del(dp: &nn->dp, r_vec); |
828 | nn_err(nn, "Error requesting IRQ %d\n" , r_vec->irq_vector); |
829 | return err; |
830 | } |
831 | disable_irq(irq: r_vec->irq_vector); |
832 | |
833 | irq_set_affinity_hint(irq: r_vec->irq_vector, m: &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 |
842 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) |
843 | { |
844 | irq_set_affinity_hint(irq: r_vec->irq_vector, NULL); |
845 | nfp_net_napi_del(dp: &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 | */ |
853 | void (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 | val: get_unaligned_le32(p: 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 | */ |
866 | void (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 | val: get_unaligned_le32(p: 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 | */ |
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), val: 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), val: 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 | */ |
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, val: get_unaligned_be32(p: addr)); |
916 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, val: get_unaligned_be16(p: 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 | */ |
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, val: 0); |
942 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, val: 0); |
943 | } |
944 | |
945 | nn_writel(nn, NFP_NET_CFG_CTRL, val: 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, val: 0); |
954 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, val: 0); |
955 | |
956 | nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, val: 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(rx_ring: &nn->dp.rx_rings[r]); |
965 | if (nfp_net_has_xsk_pool_slow(dp: &nn->dp, qid: nn->dp.rx_rings[r].idx)) |
966 | nfp_net_xsk_rx_bufs_free(rx_ring: &nn->dp.rx_rings[r]); |
967 | } |
968 | for (r = 0; r < nn->dp.num_tx_rings; r++) |
969 | nfp_net_tx_ring_reset(dp: &nn->dp, tx_ring: &nn->dp.tx_rings[r]); |
970 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
971 | nfp_net_vec_clear_ring_data(nn, idx: 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 | */ |
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, val: 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, tx_ring: &nn->dp.tx_rings[r], idx: r); |
1003 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
1004 | nfp_net_rx_ring_hw_cfg_write(nn, rx_ring: &nn->dp.rx_rings[r], idx: 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, addr: nn->dp.netdev->dev_addr); |
1014 | |
1015 | nn_writel(nn, NFP_NET_CFG_MTU, val: 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, val: 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, val: new_ctrl); |
1038 | nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, val: 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(dp: &nn->dp, rx_ring: &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, val: 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 | */ |
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(irq: nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1078 | netif_carrier_off(dev: 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(irq: r_vec->irq_vector); |
1085 | napi_disable(n: &r_vec->napi); |
1086 | |
1087 | if (r_vec->rx_ring) |
1088 | cancel_work_sync(work: &r_vec->rx_dim.work); |
1089 | |
1090 | if (r_vec->tx_ring) |
1091 | cancel_work_sync(work: &r_vec->tx_dim.work); |
1092 | } |
1093 | |
1094 | netif_tx_disable(dev: nn->dp.netdev); |
1095 | } |
1096 | |
1097 | /** |
1098 | * nfp_net_close_free_all() - Free all runtime resources |
1099 | * @nn: NFP Net device to reconfigure |
1100 | */ |
1101 | static void nfp_net_close_free_all(struct nfp_net *nn) |
1102 | { |
1103 | unsigned int r; |
1104 | |
1105 | nfp_net_tx_rings_free(dp: &nn->dp); |
1106 | nfp_net_rx_rings_free(dp: &nn->dp); |
1107 | |
1108 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
1109 | nfp_net_cleanup_vector(nn, r_vec: &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 | */ |
1119 | static int nfp_net_netdev_close(struct net_device *netdev) |
1120 | { |
1121 | struct nfp_net *nn = netdev_priv(dev: 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(dev: netdev, unsync: nfp_net_mc_unsync); |
1131 | |
1132 | nfp_net_clear_config_and_disable(nn); |
1133 | nfp_port_configure(netdev, configed: 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 | |
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(irq: nn->r_vecs[r].irq_vector); |
1151 | tasklet_disable(t: &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 | |
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(cq_period_mode: dim->mode, ix: 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(param: factor * moder.usec) || |
1180 | nfp_net_coalesce_para_check(param: moder.pkts)) |
1181 | return; |
1182 | |
1183 | /* copy RX interrupt coalesce parameters */ |
1184 | value = (moder.pkts << 16) | (factor * moder.usec); |
1185 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(r_vec->rx_ring->idx), val: value); |
1186 | (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); |
1187 | |
1188 | dim->state = DIM_START_MEASURE; |
1189 | } |
1190 | |
1191 | static void nfp_net_tx_dim_work(struct work_struct *work) |
1192 | { |
1193 | struct nfp_net_r_vector *r_vec; |
1194 | unsigned int factor, value; |
1195 | struct dim_cq_moder moder; |
1196 | struct nfp_net *nn; |
1197 | struct dim *dim; |
1198 | |
1199 | dim = container_of(work, struct dim, work); |
1200 | moder = net_dim_get_tx_moderation(cq_period_mode: dim->mode, ix: dim->profile_ix); |
1201 | r_vec = container_of(dim, struct nfp_net_r_vector, tx_dim); |
1202 | nn = r_vec->nfp_net; |
1203 | |
1204 | /* Compute factor used to convert coalesce '_usecs' parameters to |
1205 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp |
1206 | * count. |
1207 | */ |
1208 | factor = nn->tlv_caps.me_freq_mhz / 16; |
1209 | if (nfp_net_coalesce_para_check(param: factor * moder.usec) || |
1210 | nfp_net_coalesce_para_check(param: moder.pkts)) |
1211 | return; |
1212 | |
1213 | /* copy TX interrupt coalesce parameters */ |
1214 | value = (moder.pkts << 16) | (factor * moder.usec); |
1215 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(r_vec->tx_ring->idx), val: value); |
1216 | (void)nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_IRQMOD); |
1217 | |
1218 | dim->state = DIM_START_MEASURE; |
1219 | } |
1220 | |
1221 | /** |
1222 | * nfp_net_open_stack() - Start the device from stack's perspective |
1223 | * @nn: NFP Net device to reconfigure |
1224 | */ |
1225 | static void nfp_net_open_stack(struct nfp_net *nn) |
1226 | { |
1227 | struct nfp_net_r_vector *r_vec; |
1228 | unsigned int r; |
1229 | |
1230 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
1231 | r_vec = &nn->r_vecs[r]; |
1232 | |
1233 | if (r_vec->rx_ring) { |
1234 | INIT_WORK(&r_vec->rx_dim.work, nfp_net_rx_dim_work); |
1235 | r_vec->rx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; |
1236 | } |
1237 | |
1238 | if (r_vec->tx_ring) { |
1239 | INIT_WORK(&r_vec->tx_dim.work, nfp_net_tx_dim_work); |
1240 | r_vec->tx_dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE; |
1241 | } |
1242 | |
1243 | napi_enable(n: &r_vec->napi); |
1244 | enable_irq(irq: r_vec->irq_vector); |
1245 | } |
1246 | |
1247 | netif_tx_wake_all_queues(dev: nn->dp.netdev); |
1248 | |
1249 | enable_irq(irq: nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1250 | nfp_net_read_link_status(nn); |
1251 | } |
1252 | |
1253 | static int nfp_net_open_alloc_all(struct nfp_net *nn) |
1254 | { |
1255 | int err, r; |
1256 | |
1257 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, format: "%s-exn" , |
1258 | name: nn->exn_name, name_sz: sizeof(nn->exn_name), |
1259 | NFP_NET_IRQ_EXN_IDX, handler: nn->exn_handler); |
1260 | if (err) |
1261 | return err; |
1262 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, format: "%s-lsc" , |
1263 | name: nn->lsc_name, name_sz: sizeof(nn->lsc_name), |
1264 | NFP_NET_IRQ_LSC_IDX, handler: nn->lsc_handler); |
1265 | if (err) |
1266 | goto err_free_exn; |
1267 | disable_irq(irq: nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1268 | |
1269 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
1270 | err = nfp_net_prepare_vector(nn, r_vec: &nn->r_vecs[r], idx: r); |
1271 | if (err) |
1272 | goto err_cleanup_vec_p; |
1273 | } |
1274 | |
1275 | err = nfp_net_rx_rings_prepare(nn, dp: &nn->dp); |
1276 | if (err) |
1277 | goto err_cleanup_vec; |
1278 | |
1279 | err = nfp_net_tx_rings_prepare(nn, dp: &nn->dp); |
1280 | if (err) |
1281 | goto err_free_rx_rings; |
1282 | |
1283 | for (r = 0; r < nn->max_r_vecs; r++) |
1284 | nfp_net_vector_assign_rings(dp: &nn->dp, r_vec: &nn->r_vecs[r], idx: r); |
1285 | |
1286 | return 0; |
1287 | |
1288 | err_free_rx_rings: |
1289 | nfp_net_rx_rings_free(dp: &nn->dp); |
1290 | err_cleanup_vec: |
1291 | r = nn->dp.num_r_vecs; |
1292 | err_cleanup_vec_p: |
1293 | while (r--) |
1294 | nfp_net_cleanup_vector(nn, r_vec: &nn->r_vecs[r]); |
1295 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
1296 | err_free_exn: |
1297 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); |
1298 | return err; |
1299 | } |
1300 | |
1301 | static int nfp_net_netdev_open(struct net_device *netdev) |
1302 | { |
1303 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1304 | int err; |
1305 | |
1306 | /* Step 1: Allocate resources for rings and the like |
1307 | * - Request interrupts |
1308 | * - Allocate RX and TX ring resources |
1309 | * - Setup initial RSS table |
1310 | */ |
1311 | err = nfp_net_open_alloc_all(nn); |
1312 | if (err) |
1313 | return err; |
1314 | |
1315 | err = netif_set_real_num_tx_queues(dev: netdev, txq: nn->dp.num_stack_tx_rings); |
1316 | if (err) |
1317 | goto err_free_all; |
1318 | |
1319 | err = netif_set_real_num_rx_queues(dev: netdev, rxq: nn->dp.num_rx_rings); |
1320 | if (err) |
1321 | goto err_free_all; |
1322 | |
1323 | /* Step 2: Configure the NFP |
1324 | * - Ifup the physical interface if it exists |
1325 | * - Enable rings from 0 to tx_rings/rx_rings - 1. |
1326 | * - Write MAC address (in case it changed) |
1327 | * - Set the MTU |
1328 | * - Set the Freelist buffer size |
1329 | * - Enable the FW |
1330 | */ |
1331 | err = nfp_port_configure(netdev, configed: true); |
1332 | if (err) |
1333 | goto err_free_all; |
1334 | |
1335 | err = nfp_net_set_config_and_enable(nn); |
1336 | if (err) |
1337 | goto err_port_disable; |
1338 | |
1339 | /* Step 3: Enable for kernel |
1340 | * - put some freelist descriptors on each RX ring |
1341 | * - enable NAPI on each ring |
1342 | * - enable all TX queues |
1343 | * - set link state |
1344 | */ |
1345 | nfp_net_open_stack(nn); |
1346 | |
1347 | return 0; |
1348 | |
1349 | err_port_disable: |
1350 | nfp_port_configure(netdev, configed: false); |
1351 | err_free_all: |
1352 | nfp_net_close_free_all(nn); |
1353 | return err; |
1354 | } |
1355 | |
1356 | int nfp_ctrl_open(struct nfp_net *nn) |
1357 | { |
1358 | int err, r; |
1359 | |
1360 | /* ring dumping depends on vNICs being opened/closed under rtnl */ |
1361 | rtnl_lock(); |
1362 | |
1363 | err = nfp_net_open_alloc_all(nn); |
1364 | if (err) |
1365 | goto err_unlock; |
1366 | |
1367 | err = nfp_net_set_config_and_enable(nn); |
1368 | if (err) |
1369 | goto err_free_all; |
1370 | |
1371 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
1372 | enable_irq(irq: nn->r_vecs[r].irq_vector); |
1373 | |
1374 | rtnl_unlock(); |
1375 | |
1376 | return 0; |
1377 | |
1378 | err_free_all: |
1379 | nfp_net_close_free_all(nn); |
1380 | err_unlock: |
1381 | rtnl_unlock(); |
1382 | return err; |
1383 | } |
1384 | |
1385 | int nfp_net_sched_mbox_amsg_work(struct nfp_net *nn, u32 cmd, const void *data, size_t len, |
1386 | int (*cb)(struct nfp_net *, struct nfp_mbox_amsg_entry *)) |
1387 | { |
1388 | struct nfp_mbox_amsg_entry *entry; |
1389 | |
1390 | entry = kmalloc(size: sizeof(*entry) + len, GFP_ATOMIC); |
1391 | if (!entry) |
1392 | return -ENOMEM; |
1393 | |
1394 | memcpy(entry->msg, data, len); |
1395 | entry->cmd = cmd; |
1396 | entry->cfg = cb; |
1397 | |
1398 | spin_lock_bh(lock: &nn->mbox_amsg.lock); |
1399 | list_add_tail(new: &entry->list, head: &nn->mbox_amsg.list); |
1400 | spin_unlock_bh(lock: &nn->mbox_amsg.lock); |
1401 | |
1402 | schedule_work(work: &nn->mbox_amsg.work); |
1403 | |
1404 | return 0; |
1405 | } |
1406 | |
1407 | static void nfp_net_mbox_amsg_work(struct work_struct *work) |
1408 | { |
1409 | struct nfp_net *nn = container_of(work, struct nfp_net, mbox_amsg.work); |
1410 | struct nfp_mbox_amsg_entry *entry, *tmp; |
1411 | struct list_head tmp_list; |
1412 | |
1413 | INIT_LIST_HEAD(list: &tmp_list); |
1414 | |
1415 | spin_lock_bh(lock: &nn->mbox_amsg.lock); |
1416 | list_splice_init(list: &nn->mbox_amsg.list, head: &tmp_list); |
1417 | spin_unlock_bh(lock: &nn->mbox_amsg.lock); |
1418 | |
1419 | list_for_each_entry_safe(entry, tmp, &tmp_list, list) { |
1420 | int err = entry->cfg(nn, entry); |
1421 | |
1422 | if (err) |
1423 | nn_err(nn, "Config cmd %d to HW failed %d.\n" , entry->cmd, err); |
1424 | |
1425 | list_del(entry: &entry->list); |
1426 | kfree(objp: entry); |
1427 | } |
1428 | } |
1429 | |
1430 | static int nfp_net_mc_cfg(struct nfp_net *nn, struct nfp_mbox_amsg_entry *entry) |
1431 | { |
1432 | unsigned char *addr = entry->msg; |
1433 | int ret; |
1434 | |
1435 | ret = nfp_net_mbox_lock(nn, NFP_NET_CFG_MULTICAST_SZ); |
1436 | if (ret) |
1437 | return ret; |
1438 | |
1439 | nn_writel(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_HI, |
1440 | val: get_unaligned_be32(p: addr)); |
1441 | nn_writew(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_MULTICAST_MAC_LO, |
1442 | val: get_unaligned_be16(p: addr + 4)); |
1443 | |
1444 | return nfp_net_mbox_reconfig_and_unlock(nn, mbox_cmd: entry->cmd); |
1445 | } |
1446 | |
1447 | static int nfp_net_mc_sync(struct net_device *netdev, const unsigned char *addr) |
1448 | { |
1449 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1450 | |
1451 | if (netdev_mc_count(netdev) > NFP_NET_CFG_MAC_MC_MAX) { |
1452 | nn_err(nn, "Requested number of MC addresses (%d) exceeds maximum (%d).\n" , |
1453 | netdev_mc_count(netdev), NFP_NET_CFG_MAC_MC_MAX); |
1454 | return -EINVAL; |
1455 | } |
1456 | |
1457 | return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_ADD, data: addr, |
1458 | NFP_NET_CFG_MULTICAST_SZ, cb: nfp_net_mc_cfg); |
1459 | } |
1460 | |
1461 | static int nfp_net_mc_unsync(struct net_device *netdev, const unsigned char *addr) |
1462 | { |
1463 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1464 | |
1465 | return nfp_net_sched_mbox_amsg_work(nn, NFP_NET_CFG_MBOX_CMD_MULTICAST_DEL, data: addr, |
1466 | NFP_NET_CFG_MULTICAST_SZ, cb: nfp_net_mc_cfg); |
1467 | } |
1468 | |
1469 | static void nfp_net_set_rx_mode(struct net_device *netdev) |
1470 | { |
1471 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1472 | u32 new_ctrl, new_ctrl_w1; |
1473 | |
1474 | new_ctrl = nn->dp.ctrl; |
1475 | new_ctrl_w1 = nn->dp.ctrl_w1; |
1476 | |
1477 | if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI) |
1478 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC; |
1479 | else |
1480 | new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC; |
1481 | |
1482 | if (netdev->flags & IFF_ALLMULTI) |
1483 | new_ctrl_w1 &= ~NFP_NET_CFG_CTRL_MCAST_FILTER; |
1484 | else |
1485 | new_ctrl_w1 |= nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER; |
1486 | |
1487 | if (netdev->flags & IFF_PROMISC) { |
1488 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) |
1489 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; |
1490 | else |
1491 | nn_warn(nn, "FW does not support promiscuous mode\n" ); |
1492 | } else { |
1493 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; |
1494 | } |
1495 | |
1496 | if ((nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) && |
1497 | __dev_mc_sync(dev: netdev, sync: nfp_net_mc_sync, unsync: nfp_net_mc_unsync)) |
1498 | netdev_err(dev: netdev, format: "Sync mc address failed\n" ); |
1499 | |
1500 | if (new_ctrl == nn->dp.ctrl && new_ctrl_w1 == nn->dp.ctrl_w1) |
1501 | return; |
1502 | |
1503 | if (new_ctrl != nn->dp.ctrl) |
1504 | nn_writel(nn, NFP_NET_CFG_CTRL, val: new_ctrl); |
1505 | if (new_ctrl_w1 != nn->dp.ctrl_w1) |
1506 | nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, val: new_ctrl_w1); |
1507 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
1508 | |
1509 | nn->dp.ctrl = new_ctrl; |
1510 | nn->dp.ctrl_w1 = new_ctrl_w1; |
1511 | } |
1512 | |
1513 | static void (struct nfp_net *nn) |
1514 | { |
1515 | int i; |
1516 | |
1517 | for (i = 0; i < sizeof(nn->rss_itbl); i++) |
1518 | nn->rss_itbl[i] = |
1519 | ethtool_rxfh_indir_default(index: i, n_rx_rings: nn->dp.num_rx_rings); |
1520 | } |
1521 | |
1522 | static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) |
1523 | { |
1524 | struct nfp_net_dp new_dp = *dp; |
1525 | |
1526 | *dp = nn->dp; |
1527 | nn->dp = new_dp; |
1528 | |
1529 | nn->dp.netdev->mtu = new_dp.mtu; |
1530 | |
1531 | if (!netif_is_rxfh_configured(dev: nn->dp.netdev)) |
1532 | nfp_net_rss_init_itbl(nn); |
1533 | } |
1534 | |
1535 | static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp) |
1536 | { |
1537 | unsigned int r; |
1538 | int err; |
1539 | |
1540 | nfp_net_dp_swap(nn, dp); |
1541 | |
1542 | for (r = 0; r < nn->max_r_vecs; r++) |
1543 | nfp_net_vector_assign_rings(dp: &nn->dp, r_vec: &nn->r_vecs[r], idx: r); |
1544 | |
1545 | err = netif_set_real_num_queues(dev: nn->dp.netdev, |
1546 | txq: nn->dp.num_stack_tx_rings, |
1547 | rxq: nn->dp.num_rx_rings); |
1548 | if (err) |
1549 | return err; |
1550 | |
1551 | return nfp_net_set_config_and_enable(nn); |
1552 | } |
1553 | |
1554 | struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) |
1555 | { |
1556 | struct nfp_net_dp *new; |
1557 | |
1558 | new = kmalloc(size: sizeof(*new), GFP_KERNEL); |
1559 | if (!new) |
1560 | return NULL; |
1561 | |
1562 | *new = nn->dp; |
1563 | |
1564 | new->xsk_pools = kmemdup(p: new->xsk_pools, |
1565 | array_size(nn->max_r_vecs, |
1566 | sizeof(new->xsk_pools)), |
1567 | GFP_KERNEL); |
1568 | if (!new->xsk_pools) { |
1569 | kfree(objp: new); |
1570 | return NULL; |
1571 | } |
1572 | |
1573 | /* Clear things which need to be recomputed */ |
1574 | new->fl_bufsz = 0; |
1575 | new->tx_rings = NULL; |
1576 | new->rx_rings = NULL; |
1577 | new->num_r_vecs = 0; |
1578 | new->num_stack_tx_rings = 0; |
1579 | new->txrwb = NULL; |
1580 | new->txrwb_dma = 0; |
1581 | |
1582 | return new; |
1583 | } |
1584 | |
1585 | static void nfp_net_free_dp(struct nfp_net_dp *dp) |
1586 | { |
1587 | kfree(objp: dp->xsk_pools); |
1588 | kfree(objp: dp); |
1589 | } |
1590 | |
1591 | static int |
1592 | nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, |
1593 | struct netlink_ext_ack *extack) |
1594 | { |
1595 | unsigned int r, xsk_min_fl_bufsz; |
1596 | |
1597 | /* XDP-enabled tests */ |
1598 | if (!dp->xdp_prog) |
1599 | return 0; |
1600 | if (dp->fl_bufsz > PAGE_SIZE) { |
1601 | NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled" ); |
1602 | return -EINVAL; |
1603 | } |
1604 | if (dp->num_tx_rings > nn->max_tx_rings) { |
1605 | NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled" ); |
1606 | return -EINVAL; |
1607 | } |
1608 | |
1609 | xsk_min_fl_bufsz = nfp_net_calc_fl_bufsz_xsk(dp); |
1610 | for (r = 0; r < nn->max_r_vecs; r++) { |
1611 | if (!dp->xsk_pools[r]) |
1612 | continue; |
1613 | |
1614 | if (xsk_pool_get_rx_frame_size(pool: dp->xsk_pools[r]) < xsk_min_fl_bufsz) { |
1615 | NL_SET_ERR_MSG_MOD(extack, |
1616 | "XSK buffer pool chunk size too small" ); |
1617 | return -EINVAL; |
1618 | } |
1619 | } |
1620 | |
1621 | return 0; |
1622 | } |
1623 | |
1624 | int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, |
1625 | struct netlink_ext_ack *extack) |
1626 | { |
1627 | int r, err; |
1628 | |
1629 | dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); |
1630 | |
1631 | dp->num_stack_tx_rings = dp->num_tx_rings; |
1632 | if (dp->xdp_prog) |
1633 | dp->num_stack_tx_rings -= dp->num_rx_rings; |
1634 | |
1635 | dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings); |
1636 | |
1637 | err = nfp_net_check_config(nn, dp, extack); |
1638 | if (err) |
1639 | goto exit_free_dp; |
1640 | |
1641 | if (!netif_running(dev: dp->netdev)) { |
1642 | nfp_net_dp_swap(nn, dp); |
1643 | err = 0; |
1644 | goto exit_free_dp; |
1645 | } |
1646 | |
1647 | /* Prepare new rings */ |
1648 | for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) { |
1649 | err = nfp_net_prepare_vector(nn, r_vec: &nn->r_vecs[r], idx: r); |
1650 | if (err) { |
1651 | dp->num_r_vecs = r; |
1652 | goto err_cleanup_vecs; |
1653 | } |
1654 | } |
1655 | |
1656 | err = nfp_net_rx_rings_prepare(nn, dp); |
1657 | if (err) |
1658 | goto err_cleanup_vecs; |
1659 | |
1660 | err = nfp_net_tx_rings_prepare(nn, dp); |
1661 | if (err) |
1662 | goto err_free_rx; |
1663 | |
1664 | /* Stop device, swap in new rings, try to start the firmware */ |
1665 | nfp_net_close_stack(nn); |
1666 | nfp_net_clear_config_and_disable(nn); |
1667 | |
1668 | err = nfp_net_dp_swap_enable(nn, dp); |
1669 | if (err) { |
1670 | int err2; |
1671 | |
1672 | nfp_net_clear_config_and_disable(nn); |
1673 | |
1674 | /* Try with old configuration and old rings */ |
1675 | err2 = nfp_net_dp_swap_enable(nn, dp); |
1676 | if (err2) |
1677 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n" , |
1678 | err, err2); |
1679 | } |
1680 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
1681 | nfp_net_cleanup_vector(nn, r_vec: &nn->r_vecs[r]); |
1682 | |
1683 | nfp_net_rx_rings_free(dp); |
1684 | nfp_net_tx_rings_free(dp); |
1685 | |
1686 | nfp_net_open_stack(nn); |
1687 | exit_free_dp: |
1688 | nfp_net_free_dp(dp); |
1689 | |
1690 | return err; |
1691 | |
1692 | err_free_rx: |
1693 | nfp_net_rx_rings_free(dp); |
1694 | err_cleanup_vecs: |
1695 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
1696 | nfp_net_cleanup_vector(nn, r_vec: &nn->r_vecs[r]); |
1697 | nfp_net_free_dp(dp); |
1698 | return err; |
1699 | } |
1700 | |
1701 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) |
1702 | { |
1703 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1704 | struct nfp_net_dp *dp; |
1705 | int err; |
1706 | |
1707 | err = nfp_app_check_mtu(app: nn->app, netdev, new_mtu); |
1708 | if (err) |
1709 | return err; |
1710 | |
1711 | dp = nfp_net_clone_dp(nn); |
1712 | if (!dp) |
1713 | return -ENOMEM; |
1714 | |
1715 | dp->mtu = new_mtu; |
1716 | |
1717 | return nfp_net_ring_reconfig(nn, dp, NULL); |
1718 | } |
1719 | |
1720 | static int |
1721 | nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) |
1722 | { |
1723 | const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD; |
1724 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1725 | int err; |
1726 | |
1727 | /* Priority tagged packets with vlan id 0 are processed by the |
1728 | * NFP as untagged packets |
1729 | */ |
1730 | if (!vid) |
1731 | return 0; |
1732 | |
1733 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); |
1734 | if (err) |
1735 | return err; |
1736 | |
1737 | nn_writew(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, val: vid); |
1738 | nn_writew(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, |
1739 | ETH_P_8021Q); |
1740 | |
1741 | return nfp_net_mbox_reconfig_and_unlock(nn, mbox_cmd: cmd); |
1742 | } |
1743 | |
1744 | static int |
1745 | nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) |
1746 | { |
1747 | const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL; |
1748 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1749 | int err; |
1750 | |
1751 | /* Priority tagged packets with vlan id 0 are processed by the |
1752 | * NFP as untagged packets |
1753 | */ |
1754 | if (!vid) |
1755 | return 0; |
1756 | |
1757 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); |
1758 | if (err) |
1759 | return err; |
1760 | |
1761 | nn_writew(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, val: vid); |
1762 | nn_writew(nn, off: nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, |
1763 | ETH_P_8021Q); |
1764 | |
1765 | return nfp_net_mbox_reconfig_and_unlock(nn, mbox_cmd: cmd); |
1766 | } |
1767 | |
1768 | static void |
1769 | nfp_net_fs_fill_v4(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr) |
1770 | { |
1771 | unsigned int i; |
1772 | |
1773 | union { |
1774 | struct { |
1775 | __be16 loc; |
1776 | u8 k_proto, m_proto; |
1777 | __be32 k_sip, m_sip, k_dip, m_dip; |
1778 | __be16 k_sport, m_sport, k_dport, m_dport; |
1779 | }; |
1780 | __be32 val[7]; |
1781 | } v4_rule; |
1782 | |
1783 | nn_writel(nn, off: *addr, val: op); |
1784 | *addr += sizeof(u32); |
1785 | |
1786 | v4_rule.loc = cpu_to_be16(entry->loc); |
1787 | v4_rule.k_proto = entry->key.l4_proto; |
1788 | v4_rule.m_proto = entry->msk.l4_proto; |
1789 | v4_rule.k_sip = entry->key.sip4; |
1790 | v4_rule.m_sip = entry->msk.sip4; |
1791 | v4_rule.k_dip = entry->key.dip4; |
1792 | v4_rule.m_dip = entry->msk.dip4; |
1793 | v4_rule.k_sport = entry->key.sport; |
1794 | v4_rule.m_sport = entry->msk.sport; |
1795 | v4_rule.k_dport = entry->key.dport; |
1796 | v4_rule.m_dport = entry->msk.dport; |
1797 | |
1798 | for (i = 0; i < ARRAY_SIZE(v4_rule.val); i++, *addr += sizeof(__be32)) |
1799 | nn_writel(nn, off: *addr, be32_to_cpu(v4_rule.val[i])); |
1800 | } |
1801 | |
1802 | static void |
1803 | nfp_net_fs_fill_v6(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 op, u32 *addr) |
1804 | { |
1805 | unsigned int i; |
1806 | |
1807 | union { |
1808 | struct { |
1809 | __be16 loc; |
1810 | u8 k_proto, m_proto; |
1811 | __be32 k_sip[4], m_sip[4], k_dip[4], m_dip[4]; |
1812 | __be16 k_sport, m_sport, k_dport, m_dport; |
1813 | }; |
1814 | __be32 val[19]; |
1815 | } v6_rule; |
1816 | |
1817 | nn_writel(nn, off: *addr, val: op); |
1818 | *addr += sizeof(u32); |
1819 | |
1820 | v6_rule.loc = cpu_to_be16(entry->loc); |
1821 | v6_rule.k_proto = entry->key.l4_proto; |
1822 | v6_rule.m_proto = entry->msk.l4_proto; |
1823 | for (i = 0; i < 4; i++) { |
1824 | v6_rule.k_sip[i] = entry->key.sip6[i]; |
1825 | v6_rule.m_sip[i] = entry->msk.sip6[i]; |
1826 | v6_rule.k_dip[i] = entry->key.dip6[i]; |
1827 | v6_rule.m_dip[i] = entry->msk.dip6[i]; |
1828 | } |
1829 | v6_rule.k_sport = entry->key.sport; |
1830 | v6_rule.m_sport = entry->msk.sport; |
1831 | v6_rule.k_dport = entry->key.dport; |
1832 | v6_rule.m_dport = entry->msk.dport; |
1833 | |
1834 | for (i = 0; i < ARRAY_SIZE(v6_rule.val); i++, *addr += sizeof(__be32)) |
1835 | nn_writel(nn, off: *addr, be32_to_cpu(v6_rule.val[i])); |
1836 | } |
1837 | |
1838 | #define NFP_FS_QUEUE_ID GENMASK(22, 16) |
1839 | #define NFP_FS_ACT GENMASK(15, 0) |
1840 | #define NFP_FS_ACT_DROP BIT(0) |
1841 | #define NFP_FS_ACT_Q BIT(1) |
1842 | static void |
1843 | nfp_net_fs_fill_act(struct nfp_net *nn, struct nfp_fs_entry *entry, u32 addr) |
1844 | { |
1845 | u32 action = 0; /* 0 means default passthrough */ |
1846 | |
1847 | if (entry->action == RX_CLS_FLOW_DISC) |
1848 | action = NFP_FS_ACT_DROP; |
1849 | else if (!(entry->flow_type & FLOW_RSS)) |
1850 | action = FIELD_PREP(NFP_FS_QUEUE_ID, entry->action) | NFP_FS_ACT_Q; |
1851 | |
1852 | nn_writel(nn, off: addr, val: action); |
1853 | } |
1854 | |
1855 | int nfp_net_fs_add_hw(struct nfp_net *nn, struct nfp_fs_entry *entry) |
1856 | { |
1857 | u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL; |
1858 | int err; |
1859 | |
1860 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ); |
1861 | if (err) |
1862 | return err; |
1863 | |
1864 | switch (entry->flow_type & ~FLOW_RSS) { |
1865 | case TCP_V4_FLOW: |
1866 | case UDP_V4_FLOW: |
1867 | case SCTP_V4_FLOW: |
1868 | case IPV4_USER_FLOW: |
1869 | nfp_net_fs_fill_v4(nn, entry, op: NFP_NET_CFG_MBOX_CMD_FS_ADD_V4, addr: &addr); |
1870 | break; |
1871 | case TCP_V6_FLOW: |
1872 | case UDP_V6_FLOW: |
1873 | case SCTP_V6_FLOW: |
1874 | case IPV6_USER_FLOW: |
1875 | nfp_net_fs_fill_v6(nn, entry, op: NFP_NET_CFG_MBOX_CMD_FS_ADD_V6, addr: &addr); |
1876 | break; |
1877 | case ETHER_FLOW: |
1878 | nn_writel(nn, off: addr, val: NFP_NET_CFG_MBOX_CMD_FS_ADD_ETHTYPE); |
1879 | addr += sizeof(u32); |
1880 | nn_writew(nn, off: addr, be16_to_cpu(entry->key.l3_proto)); |
1881 | addr += sizeof(u32); |
1882 | break; |
1883 | } |
1884 | |
1885 | nfp_net_fs_fill_act(nn, entry, addr); |
1886 | |
1887 | err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER); |
1888 | if (err) { |
1889 | nn_err(nn, "Add new fs rule failed with %d\n" , err); |
1890 | return -EIO; |
1891 | } |
1892 | |
1893 | return 0; |
1894 | } |
1895 | |
1896 | int nfp_net_fs_del_hw(struct nfp_net *nn, struct nfp_fs_entry *entry) |
1897 | { |
1898 | u32 addr = nn->tlv_caps.mbox_off + NFP_NET_CFG_MBOX_SIMPLE_VAL; |
1899 | int err; |
1900 | |
1901 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_FS_SZ); |
1902 | if (err) |
1903 | return err; |
1904 | |
1905 | switch (entry->flow_type & ~FLOW_RSS) { |
1906 | case TCP_V4_FLOW: |
1907 | case UDP_V4_FLOW: |
1908 | case SCTP_V4_FLOW: |
1909 | case IPV4_USER_FLOW: |
1910 | nfp_net_fs_fill_v4(nn, entry, op: NFP_NET_CFG_MBOX_CMD_FS_DEL_V4, addr: &addr); |
1911 | break; |
1912 | case TCP_V6_FLOW: |
1913 | case UDP_V6_FLOW: |
1914 | case SCTP_V6_FLOW: |
1915 | case IPV6_USER_FLOW: |
1916 | nfp_net_fs_fill_v6(nn, entry, op: NFP_NET_CFG_MBOX_CMD_FS_DEL_V6, addr: &addr); |
1917 | break; |
1918 | case ETHER_FLOW: |
1919 | nn_writel(nn, off: addr, val: NFP_NET_CFG_MBOX_CMD_FS_DEL_ETHTYPE); |
1920 | addr += sizeof(u32); |
1921 | nn_writew(nn, off: addr, be16_to_cpu(entry->key.l3_proto)); |
1922 | addr += sizeof(u32); |
1923 | break; |
1924 | } |
1925 | |
1926 | nfp_net_fs_fill_act(nn, entry, addr); |
1927 | |
1928 | err = nfp_net_mbox_reconfig_and_unlock(nn, NFP_NET_CFG_MBOX_CMD_FLOW_STEER); |
1929 | if (err) { |
1930 | nn_err(nn, "Delete fs rule failed with %d\n" , err); |
1931 | return -EIO; |
1932 | } |
1933 | |
1934 | return 0; |
1935 | } |
1936 | |
1937 | static void nfp_net_fs_clean(struct nfp_net *nn) |
1938 | { |
1939 | struct nfp_fs_entry *entry, *tmp; |
1940 | |
1941 | list_for_each_entry_safe(entry, tmp, &nn->fs.list, node) { |
1942 | nfp_net_fs_del_hw(nn, entry); |
1943 | list_del(entry: &entry->node); |
1944 | kfree(objp: entry); |
1945 | } |
1946 | } |
1947 | |
1948 | static void nfp_net_stat64(struct net_device *netdev, |
1949 | struct rtnl_link_stats64 *stats) |
1950 | { |
1951 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1952 | int r; |
1953 | |
1954 | /* Collect software stats */ |
1955 | for (r = 0; r < nn->max_r_vecs; r++) { |
1956 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; |
1957 | u64 data[3]; |
1958 | unsigned int start; |
1959 | |
1960 | do { |
1961 | start = u64_stats_fetch_begin(syncp: &r_vec->rx_sync); |
1962 | data[0] = r_vec->rx_pkts; |
1963 | data[1] = r_vec->rx_bytes; |
1964 | data[2] = r_vec->rx_drops; |
1965 | } while (u64_stats_fetch_retry(syncp: &r_vec->rx_sync, start)); |
1966 | stats->rx_packets += data[0]; |
1967 | stats->rx_bytes += data[1]; |
1968 | stats->rx_dropped += data[2]; |
1969 | |
1970 | do { |
1971 | start = u64_stats_fetch_begin(syncp: &r_vec->tx_sync); |
1972 | data[0] = r_vec->tx_pkts; |
1973 | data[1] = r_vec->tx_bytes; |
1974 | data[2] = r_vec->tx_errors; |
1975 | } while (u64_stats_fetch_retry(syncp: &r_vec->tx_sync, start)); |
1976 | stats->tx_packets += data[0]; |
1977 | stats->tx_bytes += data[1]; |
1978 | stats->tx_errors += data[2]; |
1979 | } |
1980 | |
1981 | /* Add in device stats */ |
1982 | stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES); |
1983 | stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS); |
1984 | stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS); |
1985 | |
1986 | stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS); |
1987 | stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS); |
1988 | } |
1989 | |
1990 | static int nfp_net_set_features(struct net_device *netdev, |
1991 | netdev_features_t features) |
1992 | { |
1993 | netdev_features_t changed = netdev->features ^ features; |
1994 | struct nfp_net *nn = netdev_priv(dev: netdev); |
1995 | u32 new_ctrl; |
1996 | int err; |
1997 | |
1998 | /* Assume this is not called with features we have not advertised */ |
1999 | |
2000 | new_ctrl = nn->dp.ctrl; |
2001 | |
2002 | if (changed & NETIF_F_RXCSUM) { |
2003 | if (features & NETIF_F_RXCSUM) |
2004 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
2005 | else |
2006 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY; |
2007 | } |
2008 | |
2009 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { |
2010 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) |
2011 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; |
2012 | else |
2013 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; |
2014 | } |
2015 | |
2016 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { |
2017 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) |
2018 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
2019 | NFP_NET_CFG_CTRL_LSO; |
2020 | else |
2021 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
2022 | } |
2023 | |
2024 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { |
2025 | if (features & NETIF_F_HW_VLAN_CTAG_RX) |
2026 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: |
2027 | NFP_NET_CFG_CTRL_RXVLAN; |
2028 | else |
2029 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN_ANY; |
2030 | } |
2031 | |
2032 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { |
2033 | if (features & NETIF_F_HW_VLAN_CTAG_TX) |
2034 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: |
2035 | NFP_NET_CFG_CTRL_TXVLAN; |
2036 | else |
2037 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN_ANY; |
2038 | } |
2039 | |
2040 | if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { |
2041 | if (features & NETIF_F_HW_VLAN_CTAG_FILTER) |
2042 | new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; |
2043 | else |
2044 | new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER; |
2045 | } |
2046 | |
2047 | if (changed & NETIF_F_HW_VLAN_STAG_RX) { |
2048 | if (features & NETIF_F_HW_VLAN_STAG_RX) |
2049 | new_ctrl |= NFP_NET_CFG_CTRL_RXQINQ; |
2050 | else |
2051 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; |
2052 | } |
2053 | |
2054 | if (changed & NETIF_F_SG) { |
2055 | if (features & NETIF_F_SG) |
2056 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; |
2057 | else |
2058 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; |
2059 | } |
2060 | |
2061 | err = nfp_port_set_features(netdev, features); |
2062 | if (err) |
2063 | return err; |
2064 | |
2065 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n" , |
2066 | netdev->features, features, changed); |
2067 | |
2068 | if (new_ctrl == nn->dp.ctrl) |
2069 | return 0; |
2070 | |
2071 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n" , nn->dp.ctrl, new_ctrl); |
2072 | nn_writel(nn, NFP_NET_CFG_CTRL, val: new_ctrl); |
2073 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); |
2074 | if (err) |
2075 | return err; |
2076 | |
2077 | nn->dp.ctrl = new_ctrl; |
2078 | |
2079 | return 0; |
2080 | } |
2081 | |
2082 | static netdev_features_t |
2083 | nfp_net_fix_features(struct net_device *netdev, |
2084 | netdev_features_t features) |
2085 | { |
2086 | if ((features & NETIF_F_HW_VLAN_CTAG_RX) && |
2087 | (features & NETIF_F_HW_VLAN_STAG_RX)) { |
2088 | if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) { |
2089 | features &= ~NETIF_F_HW_VLAN_CTAG_RX; |
2090 | netdev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_RX; |
2091 | netdev_warn(dev: netdev, |
2092 | format: "S-tag and C-tag stripping can't be enabled at the same time. Enabling S-tag stripping and disabling C-tag stripping\n" ); |
2093 | } else if (netdev->features & NETIF_F_HW_VLAN_STAG_RX) { |
2094 | features &= ~NETIF_F_HW_VLAN_STAG_RX; |
2095 | netdev->wanted_features &= ~NETIF_F_HW_VLAN_STAG_RX; |
2096 | netdev_warn(dev: netdev, |
2097 | format: "S-tag and C-tag stripping can't be enabled at the same time. Enabling C-tag stripping and disabling S-tag stripping\n" ); |
2098 | } |
2099 | } |
2100 | return features; |
2101 | } |
2102 | |
2103 | static netdev_features_t |
2104 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, |
2105 | netdev_features_t features) |
2106 | { |
2107 | u8 l4_hdr; |
2108 | |
2109 | /* We can't do TSO over double tagged packets (802.1AD) */ |
2110 | features &= vlan_features_check(skb, features); |
2111 | |
2112 | if (!skb->encapsulation) |
2113 | return features; |
2114 | |
2115 | /* Ensure that inner L4 header offset fits into TX descriptor field */ |
2116 | if (skb_is_gso(skb)) { |
2117 | u32 hdrlen; |
2118 | |
2119 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) |
2120 | hdrlen = skb_inner_transport_offset(skb) + sizeof(struct udphdr); |
2121 | else |
2122 | hdrlen = skb_inner_tcp_all_headers(skb); |
2123 | |
2124 | /* Assume worst case scenario of having longest possible |
2125 | * metadata prepend - 8B |
2126 | */ |
2127 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8)) |
2128 | features &= ~NETIF_F_GSO_MASK; |
2129 | } |
2130 | |
2131 | if (xfrm_offload(skb)) |
2132 | return features; |
2133 | |
2134 | /* VXLAN/GRE check */ |
2135 | switch (vlan_get_protocol(skb)) { |
2136 | case htons(ETH_P_IP): |
2137 | l4_hdr = ip_hdr(skb)->protocol; |
2138 | break; |
2139 | case htons(ETH_P_IPV6): |
2140 | l4_hdr = ipv6_hdr(skb)->nexthdr; |
2141 | break; |
2142 | default: |
2143 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
2144 | } |
2145 | |
2146 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || |
2147 | skb->inner_protocol != htons(ETH_P_TEB) || |
2148 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || |
2149 | (l4_hdr == IPPROTO_UDP && |
2150 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != |
2151 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) |
2152 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
2153 | |
2154 | return features; |
2155 | } |
2156 | |
2157 | static int |
2158 | nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len) |
2159 | { |
2160 | struct nfp_net *nn = netdev_priv(dev: netdev); |
2161 | int n; |
2162 | |
2163 | /* If port is defined, devlink_port is registered and devlink core |
2164 | * is taking care of name formatting. |
2165 | */ |
2166 | if (nn->port) |
2167 | return -EOPNOTSUPP; |
2168 | |
2169 | if (nn->dp.is_vf || nn->vnic_no_name) |
2170 | return -EOPNOTSUPP; |
2171 | |
2172 | n = snprintf(buf: name, size: len, fmt: "n%d" , nn->id); |
2173 | if (n >= len) |
2174 | return -EINVAL; |
2175 | |
2176 | return 0; |
2177 | } |
2178 | |
2179 | static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf) |
2180 | { |
2181 | struct bpf_prog *prog = bpf->prog; |
2182 | struct nfp_net_dp *dp; |
2183 | int err; |
2184 | |
2185 | if (!prog == !nn->dp.xdp_prog) { |
2186 | WRITE_ONCE(nn->dp.xdp_prog, prog); |
2187 | xdp_attachment_setup(info: &nn->xdp, bpf); |
2188 | return 0; |
2189 | } |
2190 | |
2191 | dp = nfp_net_clone_dp(nn); |
2192 | if (!dp) |
2193 | return -ENOMEM; |
2194 | |
2195 | dp->xdp_prog = prog; |
2196 | dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; |
2197 | dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; |
2198 | dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0; |
2199 | |
2200 | /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ |
2201 | err = nfp_net_ring_reconfig(nn, dp, extack: bpf->extack); |
2202 | if (err) |
2203 | return err; |
2204 | |
2205 | xdp_attachment_setup(info: &nn->xdp, bpf); |
2206 | return 0; |
2207 | } |
2208 | |
2209 | static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf) |
2210 | { |
2211 | int err; |
2212 | |
2213 | err = nfp_app_xdp_offload(app: nn->app, nn, prog: bpf->prog, extack: bpf->extack); |
2214 | if (err) |
2215 | return err; |
2216 | |
2217 | xdp_attachment_setup(info: &nn->xdp_hw, bpf); |
2218 | return 0; |
2219 | } |
2220 | |
2221 | static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp) |
2222 | { |
2223 | struct nfp_net *nn = netdev_priv(dev: netdev); |
2224 | |
2225 | switch (xdp->command) { |
2226 | case XDP_SETUP_PROG: |
2227 | return nfp_net_xdp_setup_drv(nn, bpf: xdp); |
2228 | case XDP_SETUP_PROG_HW: |
2229 | return nfp_net_xdp_setup_hw(nn, bpf: xdp); |
2230 | case XDP_SETUP_XSK_POOL: |
2231 | return nfp_net_xsk_setup_pool(netdev, pool: xdp->xsk.pool, |
2232 | queue_id: xdp->xsk.queue_id); |
2233 | default: |
2234 | return nfp_app_bpf(app: nn->app, nn, bpf: xdp); |
2235 | } |
2236 | } |
2237 | |
2238 | static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) |
2239 | { |
2240 | struct nfp_net *nn = netdev_priv(dev: netdev); |
2241 | struct sockaddr *saddr = addr; |
2242 | int err; |
2243 | |
2244 | err = eth_prepare_mac_addr_change(dev: netdev, p: addr); |
2245 | if (err) |
2246 | return err; |
2247 | |
2248 | nfp_net_write_mac_addr(nn, addr: saddr->sa_data); |
2249 | |
2250 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR); |
2251 | if (err) |
2252 | return err; |
2253 | |
2254 | eth_commit_mac_addr_change(dev: netdev, p: addr); |
2255 | |
2256 | return 0; |
2257 | } |
2258 | |
2259 | static int nfp_net_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
2260 | struct net_device *dev, u32 filter_mask, |
2261 | int nlflags) |
2262 | { |
2263 | struct nfp_net *nn = netdev_priv(dev); |
2264 | u16 mode; |
2265 | |
2266 | if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) |
2267 | return -EOPNOTSUPP; |
2268 | |
2269 | mode = (nn->dp.ctrl & NFP_NET_CFG_CTRL_VEPA) ? |
2270 | BRIDGE_MODE_VEPA : BRIDGE_MODE_VEB; |
2271 | |
2272 | return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, flags: 0, mask: 0, |
2273 | nlflags, filter_mask, NULL); |
2274 | } |
2275 | |
2276 | static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh, |
2277 | u16 flags, struct netlink_ext_ack *extack) |
2278 | { |
2279 | struct nfp_net *nn = netdev_priv(dev); |
2280 | struct nlattr *attr, *br_spec; |
2281 | int rem, err; |
2282 | u32 new_ctrl; |
2283 | u16 mode; |
2284 | |
2285 | if (!(nn->cap & NFP_NET_CFG_CTRL_VEPA)) |
2286 | return -EOPNOTSUPP; |
2287 | |
2288 | br_spec = nlmsg_find_attr(nlh, hdrlen: sizeof(struct ifinfomsg), attrtype: IFLA_AF_SPEC); |
2289 | if (!br_spec) |
2290 | return -EINVAL; |
2291 | |
2292 | nla_for_each_nested(attr, br_spec, rem) { |
2293 | if (nla_type(nla: attr) != IFLA_BRIDGE_MODE) |
2294 | continue; |
2295 | |
2296 | new_ctrl = nn->dp.ctrl; |
2297 | mode = nla_get_u16(nla: attr); |
2298 | if (mode == BRIDGE_MODE_VEPA) |
2299 | new_ctrl |= NFP_NET_CFG_CTRL_VEPA; |
2300 | else if (mode == BRIDGE_MODE_VEB) |
2301 | new_ctrl &= ~NFP_NET_CFG_CTRL_VEPA; |
2302 | else |
2303 | return -EOPNOTSUPP; |
2304 | |
2305 | if (new_ctrl == nn->dp.ctrl) |
2306 | return 0; |
2307 | |
2308 | nn_writel(nn, NFP_NET_CFG_CTRL, val: new_ctrl); |
2309 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); |
2310 | if (!err) |
2311 | nn->dp.ctrl = new_ctrl; |
2312 | |
2313 | return err; |
2314 | } |
2315 | |
2316 | return -EINVAL; |
2317 | } |
2318 | |
2319 | const struct net_device_ops nfp_nfd3_netdev_ops = { |
2320 | .ndo_init = nfp_app_ndo_init, |
2321 | .ndo_uninit = nfp_app_ndo_uninit, |
2322 | .ndo_open = nfp_net_netdev_open, |
2323 | .ndo_stop = nfp_net_netdev_close, |
2324 | .ndo_start_xmit = nfp_net_tx, |
2325 | .ndo_get_stats64 = nfp_net_stat64, |
2326 | .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, |
2327 | .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, |
2328 | .ndo_set_vf_mac = nfp_app_set_vf_mac, |
2329 | .ndo_set_vf_vlan = nfp_app_set_vf_vlan, |
2330 | .ndo_set_vf_rate = nfp_app_set_vf_rate, |
2331 | .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, |
2332 | .ndo_set_vf_trust = nfp_app_set_vf_trust, |
2333 | .ndo_get_vf_config = nfp_app_get_vf_config, |
2334 | .ndo_set_vf_link_state = nfp_app_set_vf_link_state, |
2335 | .ndo_setup_tc = nfp_port_setup_tc, |
2336 | .ndo_tx_timeout = nfp_net_tx_timeout, |
2337 | .ndo_set_rx_mode = nfp_net_set_rx_mode, |
2338 | .ndo_change_mtu = nfp_net_change_mtu, |
2339 | .ndo_set_mac_address = nfp_net_set_mac_address, |
2340 | .ndo_set_features = nfp_net_set_features, |
2341 | .ndo_fix_features = nfp_net_fix_features, |
2342 | .ndo_features_check = nfp_net_features_check, |
2343 | .ndo_get_phys_port_name = nfp_net_get_phys_port_name, |
2344 | .ndo_bpf = nfp_net_xdp, |
2345 | .ndo_xsk_wakeup = nfp_net_xsk_wakeup, |
2346 | .ndo_bridge_getlink = nfp_net_bridge_getlink, |
2347 | .ndo_bridge_setlink = nfp_net_bridge_setlink, |
2348 | }; |
2349 | |
2350 | const struct net_device_ops nfp_nfdk_netdev_ops = { |
2351 | .ndo_init = nfp_app_ndo_init, |
2352 | .ndo_uninit = nfp_app_ndo_uninit, |
2353 | .ndo_open = nfp_net_netdev_open, |
2354 | .ndo_stop = nfp_net_netdev_close, |
2355 | .ndo_start_xmit = nfp_net_tx, |
2356 | .ndo_get_stats64 = nfp_net_stat64, |
2357 | .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, |
2358 | .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, |
2359 | .ndo_set_vf_mac = nfp_app_set_vf_mac, |
2360 | .ndo_set_vf_vlan = nfp_app_set_vf_vlan, |
2361 | .ndo_set_vf_rate = nfp_app_set_vf_rate, |
2362 | .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, |
2363 | .ndo_set_vf_trust = nfp_app_set_vf_trust, |
2364 | .ndo_get_vf_config = nfp_app_get_vf_config, |
2365 | .ndo_set_vf_link_state = nfp_app_set_vf_link_state, |
2366 | .ndo_setup_tc = nfp_port_setup_tc, |
2367 | .ndo_tx_timeout = nfp_net_tx_timeout, |
2368 | .ndo_set_rx_mode = nfp_net_set_rx_mode, |
2369 | .ndo_change_mtu = nfp_net_change_mtu, |
2370 | .ndo_set_mac_address = nfp_net_set_mac_address, |
2371 | .ndo_set_features = nfp_net_set_features, |
2372 | .ndo_fix_features = nfp_net_fix_features, |
2373 | .ndo_features_check = nfp_net_features_check, |
2374 | .ndo_get_phys_port_name = nfp_net_get_phys_port_name, |
2375 | .ndo_bpf = nfp_net_xdp, |
2376 | .ndo_bridge_getlink = nfp_net_bridge_getlink, |
2377 | .ndo_bridge_setlink = nfp_net_bridge_setlink, |
2378 | }; |
2379 | |
2380 | static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table) |
2381 | { |
2382 | struct nfp_net *nn = netdev_priv(dev: netdev); |
2383 | int i; |
2384 | |
2385 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); |
2386 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) { |
2387 | struct udp_tunnel_info ti0, ti1; |
2388 | |
2389 | udp_tunnel_nic_get_port(dev: netdev, table, idx: i, ti: &ti0); |
2390 | udp_tunnel_nic_get_port(dev: netdev, table, idx: i + 1, ti: &ti1); |
2391 | |
2392 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port), |
2393 | be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port)); |
2394 | } |
2395 | |
2396 | return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); |
2397 | } |
2398 | |
2399 | static const struct udp_tunnel_nic_info nfp_udp_tunnels = { |
2400 | .sync_table = nfp_udp_tunnel_sync, |
2401 | .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP | |
2402 | UDP_TUNNEL_NIC_INFO_OPEN_ONLY, |
2403 | .tables = { |
2404 | { |
2405 | .n_entries = NFP_NET_N_VXLAN_PORTS, |
2406 | .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, |
2407 | }, |
2408 | }, |
2409 | }; |
2410 | |
2411 | /** |
2412 | * nfp_net_info() - Print general info about the NIC |
2413 | * @nn: NFP Net device to reconfigure |
2414 | */ |
2415 | void nfp_net_info(struct nfp_net *nn) |
2416 | { |
2417 | nn_info(nn, "NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n" , |
2418 | nn->dp.is_vf ? "VF " : "" , |
2419 | nn->dp.num_tx_rings, nn->max_tx_rings, |
2420 | nn->dp.num_rx_rings, nn->max_rx_rings); |
2421 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n" , |
2422 | nn->fw_ver.extend, nn->fw_ver.class, |
2423 | nn->fw_ver.major, nn->fw_ver.minor, |
2424 | nn->max_mtu); |
2425 | nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" , |
2426 | nn->cap, |
2427 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "" , |
2428 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "" , |
2429 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "" , |
2430 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "" , |
2431 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "" , |
2432 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "" , |
2433 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "" , |
2434 | nn->cap & NFP_NET_CFG_CTRL_RXQINQ ? "RXQINQ " : "" , |
2435 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ? "RXVLANv2 " : "" , |
2436 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ? "TXVLANv2 " : "" , |
2437 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "" , |
2438 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "" , |
2439 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "" , |
2440 | nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "" , |
2441 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "" , |
2442 | nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "" , |
2443 | nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "" , |
2444 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "" , |
2445 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "" , |
2446 | nn->cap & NFP_NET_CFG_CTRL_TXRWB ? "TXRWB " : "" , |
2447 | nn->cap & NFP_NET_CFG_CTRL_VEPA ? "VEPA " : "" , |
2448 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "" , |
2449 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "" , |
2450 | nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? |
2451 | "RXCSUM_COMPLETE " : "" , |
2452 | nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "" , |
2453 | nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER ? "MULTICAST_FILTER " : "" , |
2454 | nn->cap_w1 & NFP_NET_CFG_CTRL_USO ? "USO " : "" , |
2455 | nfp_app_extra_cap(nn->app, nn)); |
2456 | } |
2457 | |
2458 | /** |
2459 | * nfp_net_alloc() - Allocate netdev and related structure |
2460 | * @pdev: PCI device |
2461 | * @dev_info: NFP ASIC params |
2462 | * @ctrl_bar: PCI IOMEM with vNIC config memory |
2463 | * @needs_netdev: Whether to allocate a netdev for this vNIC |
2464 | * @max_tx_rings: Maximum number of TX rings supported by device |
2465 | * @max_rx_rings: Maximum number of RX rings supported by device |
2466 | * |
2467 | * This function allocates a netdev device and fills in the initial |
2468 | * part of the @struct nfp_net structure. In case of control device |
2469 | * nfp_net structure is allocated without the netdev. |
2470 | * |
2471 | * Return: NFP Net device structure, or ERR_PTR on error. |
2472 | */ |
2473 | struct nfp_net * |
2474 | nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info, |
2475 | void __iomem *ctrl_bar, bool needs_netdev, |
2476 | unsigned int max_tx_rings, unsigned int max_rx_rings) |
2477 | { |
2478 | u64 dma_mask = dma_get_mask(dev: &pdev->dev); |
2479 | struct nfp_net *nn; |
2480 | int err; |
2481 | |
2482 | if (needs_netdev) { |
2483 | struct net_device *netdev; |
2484 | |
2485 | netdev = alloc_etherdev_mqs(sizeof_priv: sizeof(struct nfp_net), |
2486 | txqs: max_tx_rings, rxqs: max_rx_rings); |
2487 | if (!netdev) |
2488 | return ERR_PTR(error: -ENOMEM); |
2489 | |
2490 | SET_NETDEV_DEV(netdev, &pdev->dev); |
2491 | nn = netdev_priv(dev: netdev); |
2492 | nn->dp.netdev = netdev; |
2493 | } else { |
2494 | nn = vzalloc(size: sizeof(*nn)); |
2495 | if (!nn) |
2496 | return ERR_PTR(error: -ENOMEM); |
2497 | } |
2498 | |
2499 | nn->dp.dev = &pdev->dev; |
2500 | nn->dp.ctrl_bar = ctrl_bar; |
2501 | nn->dev_info = dev_info; |
2502 | nn->pdev = pdev; |
2503 | nfp_net_get_fw_version(fw_ver: &nn->fw_ver, ctrl_bar); |
2504 | |
2505 | switch (FIELD_GET(NFP_NET_CFG_VERSION_DP_MASK, nn->fw_ver.extend)) { |
2506 | case NFP_NET_CFG_VERSION_DP_NFD3: |
2507 | nn->dp.ops = &nfp_nfd3_ops; |
2508 | break; |
2509 | case NFP_NET_CFG_VERSION_DP_NFDK: |
2510 | if (nn->fw_ver.major < 5) { |
2511 | dev_err(&pdev->dev, |
2512 | "NFDK must use ABI 5 or newer, found: %d\n" , |
2513 | nn->fw_ver.major); |
2514 | err = -EINVAL; |
2515 | goto err_free_nn; |
2516 | } |
2517 | nn->dp.ops = &nfp_nfdk_ops; |
2518 | break; |
2519 | default: |
2520 | err = -EINVAL; |
2521 | goto err_free_nn; |
2522 | } |
2523 | |
2524 | if ((dma_mask & nn->dp.ops->dma_mask) != dma_mask) { |
2525 | dev_err(&pdev->dev, |
2526 | "DMA mask of loaded firmware: %llx, required DMA mask: %llx\n" , |
2527 | nn->dp.ops->dma_mask, dma_mask); |
2528 | err = -EINVAL; |
2529 | goto err_free_nn; |
2530 | } |
2531 | |
2532 | nn->max_tx_rings = max_tx_rings; |
2533 | nn->max_rx_rings = max_rx_rings; |
2534 | |
2535 | nn->dp.num_tx_rings = min_t(unsigned int, |
2536 | max_tx_rings, num_online_cpus()); |
2537 | nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings, |
2538 | netif_get_num_default_rss_queues()); |
2539 | |
2540 | nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); |
2541 | nn->dp.num_r_vecs = min_t(unsigned int, |
2542 | nn->dp.num_r_vecs, num_online_cpus()); |
2543 | nn->max_r_vecs = nn->dp.num_r_vecs; |
2544 | |
2545 | nn->dp.xsk_pools = kcalloc(n: nn->max_r_vecs, size: sizeof(nn->dp.xsk_pools), |
2546 | GFP_KERNEL); |
2547 | if (!nn->dp.xsk_pools) { |
2548 | err = -ENOMEM; |
2549 | goto err_free_nn; |
2550 | } |
2551 | |
2552 | nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; |
2553 | nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; |
2554 | |
2555 | sema_init(sem: &nn->bar_lock, val: 1); |
2556 | |
2557 | spin_lock_init(&nn->reconfig_lock); |
2558 | spin_lock_init(&nn->link_status_lock); |
2559 | |
2560 | timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0); |
2561 | |
2562 | err = nfp_net_tlv_caps_parse(dev: &nn->pdev->dev, ctrl_mem: nn->dp.ctrl_bar, |
2563 | caps: &nn->tlv_caps); |
2564 | if (err) |
2565 | goto err_free_nn; |
2566 | |
2567 | err = nfp_ccm_mbox_alloc(nn); |
2568 | if (err) |
2569 | goto err_free_nn; |
2570 | |
2571 | return nn; |
2572 | |
2573 | err_free_nn: |
2574 | if (nn->dp.netdev) |
2575 | free_netdev(dev: nn->dp.netdev); |
2576 | else |
2577 | vfree(addr: nn); |
2578 | return ERR_PTR(error: err); |
2579 | } |
2580 | |
2581 | /** |
2582 | * nfp_net_free() - Undo what @nfp_net_alloc() did |
2583 | * @nn: NFP Net device to reconfigure |
2584 | */ |
2585 | void nfp_net_free(struct nfp_net *nn) |
2586 | { |
2587 | WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted); |
2588 | nfp_ccm_mbox_free(nn); |
2589 | |
2590 | kfree(objp: nn->dp.xsk_pools); |
2591 | if (nn->dp.netdev) |
2592 | free_netdev(dev: nn->dp.netdev); |
2593 | else |
2594 | vfree(addr: nn); |
2595 | } |
2596 | |
2597 | /** |
2598 | * nfp_net_rss_key_sz() - Get current size of the RSS key |
2599 | * @nn: NFP Net device instance |
2600 | * |
2601 | * Return: size of the RSS key for currently selected hash function. |
2602 | */ |
2603 | unsigned int (struct nfp_net *nn) |
2604 | { |
2605 | switch (nn->rss_hfunc) { |
2606 | case ETH_RSS_HASH_TOP: |
2607 | return NFP_NET_CFG_RSS_KEY_SZ; |
2608 | case ETH_RSS_HASH_XOR: |
2609 | return 0; |
2610 | case ETH_RSS_HASH_CRC32: |
2611 | return 4; |
2612 | } |
2613 | |
2614 | nn_warn(nn, "Unknown hash function: %u\n" , nn->rss_hfunc); |
2615 | return 0; |
2616 | } |
2617 | |
2618 | /** |
2619 | * nfp_net_rss_init() - Set the initial RSS parameters |
2620 | * @nn: NFP Net device to reconfigure |
2621 | */ |
2622 | static void (struct nfp_net *nn) |
2623 | { |
2624 | unsigned long func_bit, ; |
2625 | u32 reg; |
2626 | |
2627 | /* Read the RSS function capability and select first supported func */ |
2628 | reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP); |
2629 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg); |
2630 | if (!rss_cap_hfunc) |
2631 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, |
2632 | NFP_NET_CFG_RSS_TOEPLITZ); |
2633 | |
2634 | func_bit = find_first_bit(addr: &rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS); |
2635 | if (func_bit == NFP_NET_CFG_RSS_HFUNCS) { |
2636 | dev_warn(nn->dp.dev, |
2637 | "Bad RSS config, defaulting to Toeplitz hash\n" ); |
2638 | func_bit = ETH_RSS_HASH_TOP_BIT; |
2639 | } |
2640 | nn->rss_hfunc = 1 << func_bit; |
2641 | |
2642 | netdev_rss_key_fill(buffer: nn->rss_key, len: nfp_net_rss_key_sz(nn)); |
2643 | |
2644 | nfp_net_rss_init_itbl(nn); |
2645 | |
2646 | /* Enable IPv4/IPv6 TCP by default */ |
2647 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | |
2648 | NFP_NET_CFG_RSS_IPV6_TCP | |
2649 | NFP_NET_CFG_RSS_IPV4_UDP | |
2650 | NFP_NET_CFG_RSS_IPV6_UDP | |
2651 | FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) | |
2652 | NFP_NET_CFG_RSS_MASK; |
2653 | } |
2654 | |
2655 | /** |
2656 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters |
2657 | * @nn: NFP Net device to reconfigure |
2658 | */ |
2659 | static void nfp_net_irqmod_init(struct nfp_net *nn) |
2660 | { |
2661 | nn->rx_coalesce_usecs = 50; |
2662 | nn->rx_coalesce_max_frames = 64; |
2663 | nn->tx_coalesce_usecs = 50; |
2664 | nn->tx_coalesce_max_frames = 64; |
2665 | |
2666 | nn->rx_coalesce_adapt_on = true; |
2667 | nn->tx_coalesce_adapt_on = true; |
2668 | } |
2669 | |
2670 | static void nfp_net_netdev_init(struct nfp_net *nn) |
2671 | { |
2672 | struct net_device *netdev = nn->dp.netdev; |
2673 | |
2674 | nfp_net_write_mac_addr(nn, addr: nn->dp.netdev->dev_addr); |
2675 | |
2676 | netdev->mtu = nn->dp.mtu; |
2677 | |
2678 | /* Advertise/enable offloads based on capabilities |
2679 | * |
2680 | * Note: netdev->features show the currently enabled features |
2681 | * and netdev->hw_features advertises which features are |
2682 | * supported. By default we enable most features. |
2683 | */ |
2684 | if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR) |
2685 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |
2686 | |
2687 | netdev->hw_features = NETIF_F_HIGHDMA; |
2688 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) { |
2689 | netdev->hw_features |= NETIF_F_RXCSUM; |
2690 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
2691 | } |
2692 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { |
2693 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; |
2694 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM; |
2695 | } |
2696 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { |
2697 | netdev->hw_features |= NETIF_F_SG; |
2698 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER; |
2699 | } |
2700 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || |
2701 | nn->cap & NFP_NET_CFG_CTRL_LSO2) { |
2702 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; |
2703 | if (nn->cap_w1 & NFP_NET_CFG_CTRL_USO) |
2704 | netdev->hw_features |= NETIF_F_GSO_UDP_L4; |
2705 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
2706 | NFP_NET_CFG_CTRL_LSO; |
2707 | } |
2708 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) |
2709 | netdev->hw_features |= NETIF_F_RXHASH; |
2710 | |
2711 | #ifdef CONFIG_NFP_NET_IPSEC |
2712 | if (nn->cap_w1 & NFP_NET_CFG_CTRL_IPSEC) |
2713 | netdev->hw_features |= NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM; |
2714 | #endif |
2715 | |
2716 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) { |
2717 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) { |
2718 | netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL | |
2719 | NETIF_F_GSO_UDP_TUNNEL_CSUM | |
2720 | NETIF_F_GSO_PARTIAL; |
2721 | netdev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM; |
2722 | } |
2723 | netdev->udp_tunnel_nic_info = &nfp_udp_tunnels; |
2724 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN; |
2725 | } |
2726 | if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) { |
2727 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) |
2728 | netdev->hw_features |= NETIF_F_GSO_GRE; |
2729 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE; |
2730 | } |
2731 | if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE)) |
2732 | netdev->hw_enc_features = netdev->hw_features; |
2733 | |
2734 | netdev->vlan_features = netdev->hw_features; |
2735 | |
2736 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN_ANY) { |
2737 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; |
2738 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXVLAN_V2 ?: |
2739 | NFP_NET_CFG_CTRL_RXVLAN; |
2740 | } |
2741 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN_ANY) { |
2742 | if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { |
2743 | nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n" ); |
2744 | } else { |
2745 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; |
2746 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_TXVLAN_V2 ?: |
2747 | NFP_NET_CFG_CTRL_TXVLAN; |
2748 | } |
2749 | } |
2750 | if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) { |
2751 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; |
2752 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; |
2753 | } |
2754 | if (nn->cap & NFP_NET_CFG_CTRL_RXQINQ) { |
2755 | netdev->hw_features |= NETIF_F_HW_VLAN_STAG_RX; |
2756 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXQINQ; |
2757 | } |
2758 | |
2759 | netdev->features = netdev->hw_features; |
2760 | |
2761 | if (nfp_app_has_tc(app: nn->app) && nn->port) |
2762 | netdev->hw_features |= NETIF_F_HW_TC; |
2763 | |
2764 | /* C-Tag strip and S-Tag strip can't be supported simultaneously, |
2765 | * so enable C-Tag strip and disable S-Tag strip by default. |
2766 | */ |
2767 | netdev->features &= ~NETIF_F_HW_VLAN_STAG_RX; |
2768 | nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_RXQINQ; |
2769 | |
2770 | netdev->xdp_features = NETDEV_XDP_ACT_BASIC; |
2771 | if (nn->app && nn->app->type->id == NFP_APP_BPF_NIC) |
2772 | netdev->xdp_features |= NETDEV_XDP_ACT_HW_OFFLOAD; |
2773 | |
2774 | /* Finalise the netdev setup */ |
2775 | switch (nn->dp.ops->version) { |
2776 | case NFP_NFD_VER_NFD3: |
2777 | netdev->netdev_ops = &nfp_nfd3_netdev_ops; |
2778 | netdev->xdp_features |= NETDEV_XDP_ACT_XSK_ZEROCOPY; |
2779 | netdev->xdp_features |= NETDEV_XDP_ACT_REDIRECT; |
2780 | break; |
2781 | case NFP_NFD_VER_NFDK: |
2782 | netdev->netdev_ops = &nfp_nfdk_netdev_ops; |
2783 | break; |
2784 | } |
2785 | |
2786 | netdev->watchdog_timeo = msecs_to_jiffies(m: 5 * 1000); |
2787 | |
2788 | /* MTU range: 68 - hw-specific max */ |
2789 | netdev->min_mtu = ETH_MIN_MTU; |
2790 | netdev->max_mtu = nn->max_mtu; |
2791 | |
2792 | netif_set_tso_max_segs(dev: netdev, NFP_NET_LSO_MAX_SEGS); |
2793 | |
2794 | netif_carrier_off(dev: netdev); |
2795 | |
2796 | nfp_net_set_ethtool_ops(netdev); |
2797 | } |
2798 | |
2799 | static int nfp_net_read_caps(struct nfp_net *nn) |
2800 | { |
2801 | /* Get some of the read-only fields from the BAR */ |
2802 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); |
2803 | nn->cap_w1 = nn_readl(nn, NFP_NET_CFG_CAP_WORD1); |
2804 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); |
2805 | |
2806 | /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases |
2807 | * we allow use of non-chained metadata if RSS(v1) is the only |
2808 | * advertised capability requiring metadata. |
2809 | */ |
2810 | nn->dp.chained_metadata_format = nn->fw_ver.major == 4 || |
2811 | !nn->dp.netdev || |
2812 | !(nn->cap & NFP_NET_CFG_CTRL_RSS) || |
2813 | nn->cap & NFP_NET_CFG_CTRL_CHAIN_META; |
2814 | /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where |
2815 | * it has the same meaning as RSSv2. |
2816 | */ |
2817 | if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4) |
2818 | nn->cap &= ~NFP_NET_CFG_CTRL_RSS; |
2819 | |
2820 | /* Determine RX packet/metadata boundary offset */ |
2821 | if (nn->fw_ver.major >= 2) { |
2822 | u32 reg; |
2823 | |
2824 | reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); |
2825 | if (reg > NFP_NET_MAX_PREPEND) { |
2826 | nn_err(nn, "Invalid rx offset: %d\n" , reg); |
2827 | return -EINVAL; |
2828 | } |
2829 | nn->dp.rx_offset = reg; |
2830 | } else { |
2831 | nn->dp.rx_offset = NFP_NET_RX_OFFSET; |
2832 | } |
2833 | |
2834 | /* Mask out NFD-version-specific features */ |
2835 | nn->cap &= nn->dp.ops->cap_mask; |
2836 | |
2837 | /* For control vNICs mask out the capabilities app doesn't want. */ |
2838 | if (!nn->dp.netdev) |
2839 | nn->cap &= nn->app->type->ctrl_cap_mask; |
2840 | |
2841 | return 0; |
2842 | } |
2843 | |
2844 | /** |
2845 | * nfp_net_init() - Initialise/finalise the nfp_net structure |
2846 | * @nn: NFP Net device structure |
2847 | * |
2848 | * Return: 0 on success or negative errno on error. |
2849 | */ |
2850 | int nfp_net_init(struct nfp_net *nn) |
2851 | { |
2852 | int err; |
2853 | |
2854 | nn->dp.rx_dma_dir = DMA_FROM_DEVICE; |
2855 | |
2856 | err = nfp_net_read_caps(nn); |
2857 | if (err) |
2858 | return err; |
2859 | |
2860 | /* Set default MTU and Freelist buffer size */ |
2861 | if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) { |
2862 | nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu); |
2863 | } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) { |
2864 | nn->dp.mtu = nn->max_mtu; |
2865 | } else { |
2866 | nn->dp.mtu = NFP_NET_DEFAULT_MTU; |
2867 | } |
2868 | nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(dp: &nn->dp); |
2869 | |
2870 | if (nfp_app_ctrl_uses_data_vnics(app: nn->app)) |
2871 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA; |
2872 | |
2873 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { |
2874 | nfp_net_rss_init(nn); |
2875 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: |
2876 | NFP_NET_CFG_CTRL_RSS; |
2877 | } |
2878 | |
2879 | /* Allow L2 Broadcast and Multicast through by default, if supported */ |
2880 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) |
2881 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC; |
2882 | |
2883 | /* Allow IRQ moderation, if supported */ |
2884 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { |
2885 | nfp_net_irqmod_init(nn); |
2886 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; |
2887 | } |
2888 | |
2889 | /* Enable TX pointer writeback, if supported */ |
2890 | if (nn->cap & NFP_NET_CFG_CTRL_TXRWB) |
2891 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXRWB; |
2892 | |
2893 | if (nn->cap_w1 & NFP_NET_CFG_CTRL_MCAST_FILTER) |
2894 | nn->dp.ctrl_w1 |= NFP_NET_CFG_CTRL_MCAST_FILTER; |
2895 | |
2896 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
2897 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; |
2898 | |
2899 | /* Make sure the FW knows the netdev is supposed to be disabled here */ |
2900 | nn_writel(nn, NFP_NET_CFG_CTRL, val: 0); |
2901 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, val: 0); |
2902 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, val: 0); |
2903 | nn_writel(nn, NFP_NET_CFG_CTRL_WORD1, val: 0); |
2904 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | |
2905 | NFP_NET_CFG_UPDATE_GEN); |
2906 | if (err) |
2907 | return err; |
2908 | |
2909 | if (nn->dp.netdev) { |
2910 | nfp_net_netdev_init(nn); |
2911 | |
2912 | err = nfp_ccm_mbox_init(nn); |
2913 | if (err) |
2914 | return err; |
2915 | |
2916 | err = nfp_net_tls_init(nn); |
2917 | if (err) |
2918 | goto err_clean_mbox; |
2919 | |
2920 | nfp_net_ipsec_init(nn); |
2921 | } |
2922 | |
2923 | nfp_net_vecs_init(nn); |
2924 | |
2925 | if (!nn->dp.netdev) |
2926 | return 0; |
2927 | |
2928 | spin_lock_init(&nn->mbox_amsg.lock); |
2929 | INIT_LIST_HEAD(list: &nn->mbox_amsg.list); |
2930 | INIT_WORK(&nn->mbox_amsg.work, nfp_net_mbox_amsg_work); |
2931 | |
2932 | INIT_LIST_HEAD(list: &nn->fs.list); |
2933 | |
2934 | return register_netdev(dev: nn->dp.netdev); |
2935 | |
2936 | err_clean_mbox: |
2937 | nfp_ccm_mbox_clean(nn); |
2938 | return err; |
2939 | } |
2940 | |
2941 | /** |
2942 | * nfp_net_clean() - Undo what nfp_net_init() did. |
2943 | * @nn: NFP Net device structure |
2944 | */ |
2945 | void nfp_net_clean(struct nfp_net *nn) |
2946 | { |
2947 | if (!nn->dp.netdev) |
2948 | return; |
2949 | |
2950 | unregister_netdev(dev: nn->dp.netdev); |
2951 | nfp_net_ipsec_clean(nn); |
2952 | nfp_ccm_mbox_clean(nn); |
2953 | nfp_net_fs_clean(nn); |
2954 | flush_work(work: &nn->mbox_amsg.work); |
2955 | nfp_net_reconfig_wait_posted(nn); |
2956 | } |
2957 | |