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4c352362 JK |
1 | /* |
2 | * Copyright (C) 2015 Netronome Systems, Inc. | |
3 | * | |
4 | * This software is dual licensed under the GNU General License Version 2, | |
5 | * June 1991 as shown in the file COPYING in the top-level directory of this | |
6 | * source tree or the BSD 2-Clause License provided below. You have the | |
7 | * option to license this software under the complete terms of either license. | |
8 | * | |
9 | * The BSD 2-Clause License: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * 2. Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | /* | |
35 | * nfp_net_common.c | |
36 | * Netronome network device driver: Common functions between PF and VF | |
37 | * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> | |
38 | * Jason McMullan <jason.mcmullan@netronome.com> | |
39 | * Rolf Neugebauer <rolf.neugebauer@netronome.com> | |
40 | * Brad Petrus <brad.petrus@netronome.com> | |
41 | * Chris Telfer <chris.telfer@netronome.com> | |
42 | */ | |
43 | ||
4c352362 JK |
44 | #include <linux/module.h> |
45 | #include <linux/kernel.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/fs.h> | |
48 | #include <linux/netdevice.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/interrupt.h> | |
51 | #include <linux/ip.h> | |
52 | #include <linux/ipv6.h> | |
53 | #include <linux/pci.h> | |
54 | #include <linux/pci_regs.h> | |
55 | #include <linux/msi.h> | |
56 | #include <linux/ethtool.h> | |
57 | #include <linux/log2.h> | |
58 | #include <linux/if_vlan.h> | |
59 | #include <linux/random.h> | |
60 | ||
61 | #include <linux/ktime.h> | |
62 | ||
63 | #include <net/vxlan.h> | |
64 | ||
65 | #include "nfp_net_ctrl.h" | |
66 | #include "nfp_net.h" | |
67 | ||
68 | /** | |
69 | * nfp_net_get_fw_version() - Read and parse the FW version | |
70 | * @fw_ver: Output fw_version structure to read to | |
71 | * @ctrl_bar: Mapped address of the control BAR | |
72 | */ | |
73 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
74 | void __iomem *ctrl_bar) | |
75 | { | |
76 | u32 reg; | |
77 | ||
78 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
79 | put_unaligned_le32(reg, fw_ver); | |
80 | } | |
81 | ||
3d780b92 JK |
82 | /* Firmware reconfig |
83 | * | |
84 | * Firmware reconfig may take a while so we have two versions of it - | |
85 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
86 | * RTNL so we don't have to worry about serializing them. | |
87 | */ | |
88 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
89 | { | |
90 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
91 | /* ensure update is written before pinging HW */ | |
92 | nn_pci_flush(nn); | |
93 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
94 | } | |
95 | ||
96 | /* Pass 0 as update to run posted reconfigs. */ | |
97 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
98 | { | |
99 | update |= nn->reconfig_posted; | |
100 | nn->reconfig_posted = 0; | |
101 | ||
102 | nfp_net_reconfig_start(nn, update); | |
103 | ||
104 | nn->reconfig_timer_active = true; | |
105 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
106 | } | |
107 | ||
108 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
109 | { | |
110 | u32 reg; | |
111 | ||
112 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
113 | if (reg == 0) | |
114 | return true; | |
115 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
116 | nn_err(nn, "Reconfig error: 0x%08x\n", reg); | |
117 | return true; | |
118 | } else if (last_check) { | |
119 | nn_err(nn, "Reconfig timeout: 0x%08x\n", reg); | |
120 | return true; | |
121 | } | |
122 | ||
123 | return false; | |
124 | } | |
125 | ||
126 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
127 | { | |
128 | bool timed_out = false; | |
129 | ||
130 | /* Poll update field, waiting for NFP to ack the config */ | |
131 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { | |
132 | msleep(1); | |
133 | timed_out = time_is_before_eq_jiffies(deadline); | |
134 | } | |
135 | ||
136 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) | |
137 | return -EIO; | |
138 | ||
139 | return timed_out ? -EIO : 0; | |
140 | } | |
141 | ||
142 | static void nfp_net_reconfig_timer(unsigned long data) | |
143 | { | |
144 | struct nfp_net *nn = (void *)data; | |
145 | ||
146 | spin_lock_bh(&nn->reconfig_lock); | |
147 | ||
148 | nn->reconfig_timer_active = false; | |
149 | ||
150 | /* If sync caller is present it will take over from us */ | |
151 | if (nn->reconfig_sync_present) | |
152 | goto done; | |
153 | ||
154 | /* Read reconfig status and report errors */ | |
155 | nfp_net_reconfig_check_done(nn, true); | |
156 | ||
157 | if (nn->reconfig_posted) | |
158 | nfp_net_reconfig_start_async(nn, 0); | |
159 | done: | |
160 | spin_unlock_bh(&nn->reconfig_lock); | |
161 | } | |
162 | ||
163 | /** | |
164 | * nfp_net_reconfig_post() - Post async reconfig request | |
165 | * @nn: NFP Net device to reconfigure | |
166 | * @update: The value for the update field in the BAR config | |
167 | * | |
168 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
169 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
170 | * merged together! | |
171 | */ | |
172 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
173 | { | |
174 | spin_lock_bh(&nn->reconfig_lock); | |
175 | ||
176 | /* Sync caller will kick off async reconf when it's done, just post */ | |
177 | if (nn->reconfig_sync_present) { | |
178 | nn->reconfig_posted |= update; | |
179 | goto done; | |
180 | } | |
181 | ||
182 | /* Opportunistically check if the previous command is done */ | |
183 | if (!nn->reconfig_timer_active || | |
184 | nfp_net_reconfig_check_done(nn, false)) | |
185 | nfp_net_reconfig_start_async(nn, update); | |
186 | else | |
187 | nn->reconfig_posted |= update; | |
188 | done: | |
189 | spin_unlock_bh(&nn->reconfig_lock); | |
190 | } | |
191 | ||
4c352362 JK |
192 | /** |
193 | * nfp_net_reconfig() - Reconfigure the firmware | |
194 | * @nn: NFP Net device to reconfigure | |
195 | * @update: The value for the update field in the BAR config | |
196 | * | |
197 | * Write the update word to the BAR and ping the reconfig queue. The | |
198 | * poll until the firmware has acknowledged the update by zeroing the | |
199 | * update word. | |
200 | * | |
201 | * Return: Negative errno on error, 0 on success | |
202 | */ | |
203 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) | |
204 | { | |
3d780b92 JK |
205 | bool cancelled_timer = false; |
206 | u32 pre_posted_requests; | |
207 | int ret; | |
4c352362 JK |
208 | |
209 | spin_lock_bh(&nn->reconfig_lock); | |
210 | ||
3d780b92 | 211 | nn->reconfig_sync_present = true; |
4c352362 | 212 | |
3d780b92 JK |
213 | if (nn->reconfig_timer_active) { |
214 | del_timer(&nn->reconfig_timer); | |
215 | nn->reconfig_timer_active = false; | |
216 | cancelled_timer = true; | |
217 | } | |
218 | pre_posted_requests = nn->reconfig_posted; | |
219 | nn->reconfig_posted = 0; | |
220 | ||
221 | spin_unlock_bh(&nn->reconfig_lock); | |
222 | ||
223 | if (cancelled_timer) | |
224 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); | |
225 | ||
226 | /* Run the posted reconfigs which were issued before we started */ | |
227 | if (pre_posted_requests) { | |
228 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
229 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 JK |
230 | } |
231 | ||
3d780b92 JK |
232 | nfp_net_reconfig_start(nn, update); |
233 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
234 | ||
235 | spin_lock_bh(&nn->reconfig_lock); | |
236 | ||
237 | if (nn->reconfig_posted) | |
238 | nfp_net_reconfig_start_async(nn, 0); | |
239 | ||
240 | nn->reconfig_sync_present = false; | |
241 | ||
4c352362 | 242 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 243 | |
4c352362 JK |
244 | return ret; |
245 | } | |
246 | ||
247 | /* Interrupt configuration and handling | |
248 | */ | |
249 | ||
250 | /** | |
251 | * nfp_net_irq_unmask_msix() - Unmask MSI-X after automasking | |
252 | * @nn: NFP Network structure | |
253 | * @entry_nr: MSI-X table entry | |
254 | * | |
255 | * Clear the MSI-X table mask bit for the given entry bypassing Linux irq | |
256 | * handling subsystem. Use *only* to reenable automasked vectors. | |
257 | */ | |
258 | static void nfp_net_irq_unmask_msix(struct nfp_net *nn, unsigned int entry_nr) | |
259 | { | |
260 | struct list_head *msi_head = &nn->pdev->dev.msi_list; | |
261 | struct msi_desc *entry; | |
262 | u32 off; | |
263 | ||
264 | /* All MSI-Xs have the same mask_base */ | |
265 | entry = list_first_entry(msi_head, struct msi_desc, list); | |
266 | ||
267 | off = (PCI_MSIX_ENTRY_SIZE * entry_nr) + | |
268 | PCI_MSIX_ENTRY_VECTOR_CTRL; | |
269 | writel(0, entry->mask_base + off); | |
270 | readl(entry->mask_base); | |
271 | } | |
272 | ||
273 | /** | |
274 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
275 | * @nn: NFP Network structure | |
276 | * @entry_nr: MSI-X table entry | |
277 | * | |
278 | * If MSI-X auto-masking is enabled clear the mask bit, otherwise | |
279 | * clear the ICR for the entry. | |
280 | */ | |
281 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
282 | { | |
283 | if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) { | |
284 | nfp_net_irq_unmask_msix(nn, entry_nr); | |
285 | return; | |
286 | } | |
287 | ||
288 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); | |
289 | nn_pci_flush(nn); | |
290 | } | |
291 | ||
292 | /** | |
293 | * nfp_net_msix_alloc() - Try to allocate MSI-X irqs | |
294 | * @nn: NFP Network structure | |
295 | * @nr_vecs: Number of MSI-X vectors to allocate | |
296 | * | |
297 | * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. | |
298 | * | |
299 | * Return: Number of MSI-X vectors obtained or 0 on error. | |
300 | */ | |
301 | static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) | |
302 | { | |
303 | struct pci_dev *pdev = nn->pdev; | |
304 | int nvecs; | |
305 | int i; | |
306 | ||
307 | for (i = 0; i < nr_vecs; i++) | |
308 | nn->irq_entries[i].entry = i; | |
309 | ||
310 | nvecs = pci_enable_msix_range(pdev, nn->irq_entries, | |
311 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs); | |
312 | if (nvecs < 0) { | |
313 | nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", | |
314 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | return nvecs; | |
319 | } | |
320 | ||
321 | /** | |
322 | * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want | |
323 | * @nn: NFP Network structure | |
324 | * | |
325 | * We want a vector per CPU (or ring), whatever is smaller plus | |
326 | * NFP_NET_NON_Q_VECTORS for LSC etc. | |
327 | * | |
328 | * Return: Number of interrupts wanted | |
329 | */ | |
330 | static int nfp_net_irqs_wanted(struct nfp_net *nn) | |
331 | { | |
332 | int ncpus; | |
333 | int vecs; | |
334 | ||
335 | ncpus = num_online_cpus(); | |
336 | ||
337 | vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); | |
338 | vecs = min_t(int, vecs, ncpus); | |
339 | ||
340 | return vecs + NFP_NET_NON_Q_VECTORS; | |
341 | } | |
342 | ||
343 | /** | |
344 | * nfp_net_irqs_alloc() - allocates MSI-X irqs | |
345 | * @nn: NFP Network structure | |
346 | * | |
347 | * Return: Number of irqs obtained or 0 on error. | |
348 | */ | |
349 | int nfp_net_irqs_alloc(struct nfp_net *nn) | |
350 | { | |
351 | int wanted_irqs; | |
352 | ||
353 | wanted_irqs = nfp_net_irqs_wanted(nn); | |
354 | ||
355 | nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); | |
356 | if (nn->num_irqs == 0) { | |
357 | nn_err(nn, "Failed to allocate MSI-X IRQs\n"); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; | |
362 | ||
363 | if (nn->num_irqs < wanted_irqs) | |
364 | nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", | |
365 | wanted_irqs, nn->num_irqs); | |
366 | ||
367 | return nn->num_irqs; | |
368 | } | |
369 | ||
370 | /** | |
371 | * nfp_net_irqs_disable() - Disable interrupts | |
372 | * @nn: NFP Network structure | |
373 | * | |
374 | * Undoes what @nfp_net_irqs_alloc() does. | |
375 | */ | |
376 | void nfp_net_irqs_disable(struct nfp_net *nn) | |
377 | { | |
378 | pci_disable_msix(nn->pdev); | |
379 | } | |
380 | ||
381 | /** | |
382 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
383 | * @irq: Interrupt | |
384 | * @data: Opaque data structure | |
385 | * | |
386 | * Return: Indicate if the interrupt has been handled. | |
387 | */ | |
388 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
389 | { | |
390 | struct nfp_net_r_vector *r_vec = data; | |
391 | ||
392 | napi_schedule_irqoff(&r_vec->napi); | |
393 | ||
394 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
395 | * the MSI-X table or via the per entry ICR field. So there | |
396 | * is no need to disable interrupts here. | |
397 | */ | |
398 | return IRQ_HANDLED; | |
399 | } | |
400 | ||
401 | /** | |
402 | * nfp_net_read_link_status() - Reread link status from control BAR | |
403 | * @nn: NFP Network structure | |
404 | */ | |
405 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
406 | { | |
407 | unsigned long flags; | |
408 | bool link_up; | |
409 | u32 sts; | |
410 | ||
411 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
412 | ||
413 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
414 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
415 | ||
416 | if (nn->link_up == link_up) | |
417 | goto out; | |
418 | ||
419 | nn->link_up = link_up; | |
420 | ||
421 | if (nn->link_up) { | |
422 | netif_carrier_on(nn->netdev); | |
423 | netdev_info(nn->netdev, "NIC Link is Up\n"); | |
424 | } else { | |
425 | netif_carrier_off(nn->netdev); | |
426 | netdev_info(nn->netdev, "NIC Link is Down\n"); | |
427 | } | |
428 | out: | |
429 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
430 | } | |
431 | ||
432 | /** | |
433 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
434 | * @irq: Interrupt | |
435 | * @data: Opaque data structure | |
436 | * | |
437 | * Return: Indicate if the interrupt has been handled. | |
438 | */ | |
439 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
440 | { | |
441 | struct nfp_net *nn = data; | |
442 | ||
443 | nfp_net_read_link_status(nn); | |
444 | ||
445 | nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); | |
446 | ||
447 | return IRQ_HANDLED; | |
448 | } | |
449 | ||
450 | /** | |
451 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
452 | * @irq: Interrupt | |
453 | * @data: Opaque data structure | |
454 | * | |
455 | * Return: Indicate if the interrupt has been handled. | |
456 | */ | |
457 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
458 | { | |
459 | struct nfp_net *nn = data; | |
460 | ||
461 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
462 | /* XXX TO BE IMPLEMENTED */ | |
463 | return IRQ_HANDLED; | |
464 | } | |
465 | ||
466 | /** | |
467 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
468 | * @tx_ring: TX ring structure | |
d79737c2 JK |
469 | * @r_vec: IRQ vector servicing this ring |
470 | * @idx: Ring index | |
4c352362 | 471 | */ |
d79737c2 JK |
472 | static void |
473 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
474 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 475 | { |
4c352362 JK |
476 | struct nfp_net *nn = r_vec->nfp_net; |
477 | ||
d79737c2 JK |
478 | tx_ring->idx = idx; |
479 | tx_ring->r_vec = r_vec; | |
480 | ||
4c352362 JK |
481 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
482 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
483 | } | |
484 | ||
485 | /** | |
486 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
487 | * @rx_ring: RX ring structure | |
d79737c2 JK |
488 | * @r_vec: IRQ vector servicing this ring |
489 | * @idx: Ring index | |
4c352362 | 490 | */ |
d79737c2 JK |
491 | static void |
492 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
493 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 494 | { |
4c352362 JK |
495 | struct nfp_net *nn = r_vec->nfp_net; |
496 | ||
d79737c2 JK |
497 | rx_ring->idx = idx; |
498 | rx_ring->r_vec = r_vec; | |
499 | ||
4c352362 JK |
500 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
501 | rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); | |
502 | ||
503 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); | |
504 | rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); | |
505 | } | |
506 | ||
507 | /** | |
508 | * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. | |
509 | * @netdev: netdev structure | |
510 | */ | |
511 | static void nfp_net_irqs_assign(struct net_device *netdev) | |
512 | { | |
513 | struct nfp_net *nn = netdev_priv(netdev); | |
514 | struct nfp_net_r_vector *r_vec; | |
515 | int r; | |
516 | ||
517 | /* Assumes nn->num_tx_rings == nn->num_rx_rings */ | |
518 | if (nn->num_tx_rings > nn->num_r_vecs) { | |
519 | nn_warn(nn, "More rings (%d) than vectors (%d).\n", | |
520 | nn->num_tx_rings, nn->num_r_vecs); | |
521 | nn->num_tx_rings = nn->num_r_vecs; | |
522 | nn->num_rx_rings = nn->num_r_vecs; | |
523 | } | |
524 | ||
525 | nn->lsc_handler = nfp_net_irq_lsc; | |
526 | nn->exn_handler = nfp_net_irq_exn; | |
527 | ||
528 | for (r = 0; r < nn->num_r_vecs; r++) { | |
529 | r_vec = &nn->r_vecs[r]; | |
530 | r_vec->nfp_net = nn; | |
531 | r_vec->handler = nfp_net_irq_rxtx; | |
532 | r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; | |
533 | ||
534 | cpumask_set_cpu(r, &r_vec->affinity_mask); | |
4c352362 JK |
535 | } |
536 | } | |
537 | ||
538 | /** | |
539 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
540 | * @nn: NFP Network structure | |
541 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
542 | * @format: printf-style format to construct the interrupt name | |
543 | * @name: Pointer to allocated space for interrupt name | |
544 | * @name_sz: Size of space for interrupt name | |
545 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
546 | * @handler: IRQ handler to register for this interrupt | |
547 | */ | |
548 | static int | |
549 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
550 | const char *format, char *name, size_t name_sz, | |
551 | unsigned int vector_idx, irq_handler_t handler) | |
552 | { | |
553 | struct msix_entry *entry; | |
554 | int err; | |
555 | ||
556 | entry = &nn->irq_entries[vector_idx]; | |
557 | ||
558 | snprintf(name, name_sz, format, netdev_name(nn->netdev)); | |
559 | err = request_irq(entry->vector, handler, 0, name, nn); | |
560 | if (err) { | |
561 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
562 | entry->vector, err); | |
563 | return err; | |
564 | } | |
565 | nn_writeb(nn, ctrl_offset, vector_idx); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | /** | |
571 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
572 | * @nn: NFP Network structure | |
573 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
574 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
575 | */ | |
576 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
577 | unsigned int vector_idx) | |
578 | { | |
579 | nn_writeb(nn, ctrl_offset, 0xff); | |
580 | free_irq(nn->irq_entries[vector_idx].vector, nn); | |
581 | } | |
582 | ||
583 | /* Transmit | |
584 | * | |
585 | * One queue controller peripheral queue is used for transmit. The | |
586 | * driver en-queues packets for transmit by advancing the write | |
587 | * pointer. The device indicates that packets have transmitted by | |
588 | * advancing the read pointer. The driver maintains a local copy of | |
589 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
590 | * keeps @wr_p in sync with the queue controller write pointer and can | |
591 | * determine how many packets have been transmitted by comparing its | |
592 | * copy of the read pointer @rd_p with the read pointer maintained by | |
593 | * the queue controller peripheral. | |
594 | */ | |
595 | ||
596 | /** | |
597 | * nfp_net_tx_full() - Check if the TX ring is full | |
598 | * @tx_ring: TX ring to check | |
599 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
600 | * | |
601 | * This function checks, based on the *host copy* of read/write | |
602 | * pointer if a given TX ring is full. The real TX queue may have | |
603 | * some newly made available slots. | |
604 | * | |
605 | * Return: True if the ring is full. | |
606 | */ | |
607 | static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) | |
608 | { | |
609 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
610 | } | |
611 | ||
612 | /* Wrappers for deciding when to stop and restart TX queues */ | |
613 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
614 | { | |
615 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
616 | } | |
617 | ||
618 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
619 | { | |
620 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
621 | } | |
622 | ||
623 | /** | |
624 | * nfp_net_tx_ring_stop() - stop tx ring | |
625 | * @nd_q: netdev queue | |
626 | * @tx_ring: driver tx queue structure | |
627 | * | |
628 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
629 | * someone else may be cleaning the TX ring completions so we need to be | |
630 | * extra careful here. | |
631 | */ | |
632 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
633 | struct nfp_net_tx_ring *tx_ring) | |
634 | { | |
635 | netif_tx_stop_queue(nd_q); | |
636 | ||
637 | /* We can race with the TX completion out of NAPI so recheck */ | |
638 | smp_mb(); | |
639 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
640 | netif_tx_start_queue(nd_q); | |
641 | } | |
642 | ||
643 | /** | |
644 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
645 | * @nn: NFP Net device | |
646 | * @r_vec: per-ring structure | |
647 | * @txbuf: Pointer to driver soft TX descriptor | |
648 | * @txd: Pointer to HW TX descriptor | |
649 | * @skb: Pointer to SKB | |
650 | * | |
651 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
652 | * Return error on packet header greater than maximum supported LSO header size. | |
653 | */ | |
654 | static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
655 | struct nfp_net_tx_buf *txbuf, | |
656 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
657 | { | |
658 | u32 hdrlen; | |
659 | u16 mss; | |
660 | ||
661 | if (!skb_is_gso(skb)) | |
662 | return; | |
663 | ||
664 | if (!skb->encapsulation) | |
665 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
666 | else | |
667 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
668 | inner_tcp_hdrlen(skb); | |
669 | ||
670 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
671 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
672 | ||
673 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
674 | txd->l4_offset = hdrlen; | |
675 | txd->mss = cpu_to_le16(mss); | |
676 | txd->flags |= PCIE_DESC_TX_LSO; | |
677 | ||
678 | u64_stats_update_begin(&r_vec->tx_sync); | |
679 | r_vec->tx_lso++; | |
680 | u64_stats_update_end(&r_vec->tx_sync); | |
681 | } | |
682 | ||
683 | /** | |
684 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
685 | * @nn: NFP Net device | |
686 | * @r_vec: per-ring structure | |
687 | * @txbuf: Pointer to driver soft TX descriptor | |
688 | * @txd: Pointer to TX descriptor | |
689 | * @skb: Pointer to SKB | |
690 | * | |
691 | * This function sets the TX checksum flags in the TX descriptor based | |
692 | * on the configuration and the protocol of the packet to be transmitted. | |
693 | */ | |
694 | static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
695 | struct nfp_net_tx_buf *txbuf, | |
696 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
697 | { | |
698 | struct ipv6hdr *ipv6h; | |
699 | struct iphdr *iph; | |
700 | u8 l4_hdr; | |
701 | ||
702 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) | |
703 | return; | |
704 | ||
705 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
706 | return; | |
707 | ||
708 | txd->flags |= PCIE_DESC_TX_CSUM; | |
709 | if (skb->encapsulation) | |
710 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
711 | ||
712 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
713 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
714 | ||
715 | if (iph->version == 4) { | |
716 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
717 | l4_hdr = iph->protocol; | |
718 | } else if (ipv6h->version == 6) { | |
719 | l4_hdr = ipv6h->nexthdr; | |
720 | } else { | |
721 | nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", | |
722 | iph->version); | |
723 | return; | |
724 | } | |
725 | ||
726 | switch (l4_hdr) { | |
727 | case IPPROTO_TCP: | |
728 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
729 | break; | |
730 | case IPPROTO_UDP: | |
731 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
732 | break; | |
733 | default: | |
734 | nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", | |
735 | l4_hdr); | |
736 | return; | |
737 | } | |
738 | ||
739 | u64_stats_update_begin(&r_vec->tx_sync); | |
740 | if (skb->encapsulation) | |
741 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
742 | else | |
743 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
744 | u64_stats_update_end(&r_vec->tx_sync); | |
745 | } | |
746 | ||
747 | /** | |
748 | * nfp_net_tx() - Main transmit entry point | |
749 | * @skb: SKB to transmit | |
750 | * @netdev: netdev structure | |
751 | * | |
752 | * Return: NETDEV_TX_OK on success. | |
753 | */ | |
754 | static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) | |
755 | { | |
756 | struct nfp_net *nn = netdev_priv(netdev); | |
757 | const struct skb_frag_struct *frag; | |
758 | struct nfp_net_r_vector *r_vec; | |
759 | struct nfp_net_tx_desc *txd, txdg; | |
760 | struct nfp_net_tx_buf *txbuf; | |
761 | struct nfp_net_tx_ring *tx_ring; | |
762 | struct netdev_queue *nd_q; | |
763 | dma_addr_t dma_addr; | |
764 | unsigned int fsize; | |
765 | int f, nr_frags; | |
766 | int wr_idx; | |
767 | u16 qidx; | |
768 | ||
769 | qidx = skb_get_queue_mapping(skb); | |
770 | tx_ring = &nn->tx_rings[qidx]; | |
771 | r_vec = tx_ring->r_vec; | |
772 | nd_q = netdev_get_tx_queue(nn->netdev, qidx); | |
773 | ||
774 | nr_frags = skb_shinfo(skb)->nr_frags; | |
775 | ||
776 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
777 | nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", | |
778 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
779 | netif_tx_stop_queue(nd_q); | |
780 | u64_stats_update_begin(&r_vec->tx_sync); | |
781 | r_vec->tx_busy++; | |
782 | u64_stats_update_end(&r_vec->tx_sync); | |
783 | return NETDEV_TX_BUSY; | |
784 | } | |
785 | ||
786 | /* Start with the head skbuf */ | |
787 | dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), | |
788 | DMA_TO_DEVICE); | |
789 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
790 | goto err_free; | |
791 | ||
792 | wr_idx = tx_ring->wr_p % tx_ring->cnt; | |
793 | ||
794 | /* Stash the soft descriptor of the head then initialize it */ | |
795 | txbuf = &tx_ring->txbufs[wr_idx]; | |
796 | txbuf->skb = skb; | |
797 | txbuf->dma_addr = dma_addr; | |
798 | txbuf->fidx = -1; | |
799 | txbuf->pkt_cnt = 1; | |
800 | txbuf->real_len = skb->len; | |
801 | ||
802 | /* Build TX descriptor */ | |
803 | txd = &tx_ring->txds[wr_idx]; | |
804 | txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; | |
805 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
806 | nfp_desc_set_dma_addr(txd, dma_addr); | |
807 | txd->data_len = cpu_to_le16(skb->len); | |
808 | ||
809 | txd->flags = 0; | |
810 | txd->mss = 0; | |
811 | txd->l4_offset = 0; | |
812 | ||
813 | nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); | |
814 | ||
815 | nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); | |
816 | ||
817 | if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { | |
818 | txd->flags |= PCIE_DESC_TX_VLAN; | |
819 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
820 | } | |
821 | ||
822 | /* Gather DMA */ | |
823 | if (nr_frags > 0) { | |
824 | /* all descs must match except for in addr, length and eop */ | |
825 | txdg = *txd; | |
826 | ||
827 | for (f = 0; f < nr_frags; f++) { | |
828 | frag = &skb_shinfo(skb)->frags[f]; | |
829 | fsize = skb_frag_size(frag); | |
830 | ||
831 | dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, | |
832 | fsize, DMA_TO_DEVICE); | |
833 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
834 | goto err_unmap; | |
835 | ||
836 | wr_idx = (wr_idx + 1) % tx_ring->cnt; | |
837 | tx_ring->txbufs[wr_idx].skb = skb; | |
838 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
839 | tx_ring->txbufs[wr_idx].fidx = f; | |
840 | ||
841 | txd = &tx_ring->txds[wr_idx]; | |
842 | *txd = txdg; | |
843 | txd->dma_len = cpu_to_le16(fsize); | |
844 | nfp_desc_set_dma_addr(txd, dma_addr); | |
845 | txd->offset_eop = | |
846 | (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; | |
847 | } | |
848 | ||
849 | u64_stats_update_begin(&r_vec->tx_sync); | |
850 | r_vec->tx_gather++; | |
851 | u64_stats_update_end(&r_vec->tx_sync); | |
852 | } | |
853 | ||
854 | netdev_tx_sent_queue(nd_q, txbuf->real_len); | |
855 | ||
856 | tx_ring->wr_p += nr_frags + 1; | |
857 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
858 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
859 | ||
860 | tx_ring->wr_ptr_add += nr_frags + 1; | |
861 | if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { | |
862 | /* force memory write before we let HW know */ | |
863 | wmb(); | |
864 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
865 | tx_ring->wr_ptr_add = 0; | |
866 | } | |
867 | ||
868 | skb_tx_timestamp(skb); | |
869 | ||
870 | return NETDEV_TX_OK; | |
871 | ||
872 | err_unmap: | |
873 | --f; | |
874 | while (f >= 0) { | |
875 | frag = &skb_shinfo(skb)->frags[f]; | |
876 | dma_unmap_page(&nn->pdev->dev, | |
877 | tx_ring->txbufs[wr_idx].dma_addr, | |
878 | skb_frag_size(frag), DMA_TO_DEVICE); | |
879 | tx_ring->txbufs[wr_idx].skb = NULL; | |
880 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
881 | tx_ring->txbufs[wr_idx].fidx = -2; | |
882 | wr_idx = wr_idx - 1; | |
883 | if (wr_idx < 0) | |
884 | wr_idx += tx_ring->cnt; | |
885 | } | |
886 | dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, | |
887 | skb_headlen(skb), DMA_TO_DEVICE); | |
888 | tx_ring->txbufs[wr_idx].skb = NULL; | |
889 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
890 | tx_ring->txbufs[wr_idx].fidx = -2; | |
891 | err_free: | |
892 | nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); | |
893 | u64_stats_update_begin(&r_vec->tx_sync); | |
894 | r_vec->tx_errors++; | |
895 | u64_stats_update_end(&r_vec->tx_sync); | |
896 | dev_kfree_skb_any(skb); | |
897 | return NETDEV_TX_OK; | |
898 | } | |
899 | ||
900 | /** | |
901 | * nfp_net_tx_complete() - Handled completed TX packets | |
902 | * @tx_ring: TX ring structure | |
903 | * | |
904 | * Return: Number of completed TX descriptors | |
905 | */ | |
906 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) | |
907 | { | |
908 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
909 | struct nfp_net *nn = r_vec->nfp_net; | |
910 | const struct skb_frag_struct *frag; | |
911 | struct netdev_queue *nd_q; | |
912 | u32 done_pkts = 0, done_bytes = 0; | |
913 | struct sk_buff *skb; | |
914 | int todo, nr_frags; | |
915 | u32 qcp_rd_p; | |
916 | int fidx; | |
917 | int idx; | |
918 | ||
919 | /* Work out how many descriptors have been transmitted */ | |
920 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
921 | ||
922 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
923 | return; | |
924 | ||
925 | if (qcp_rd_p > tx_ring->qcp_rd_p) | |
926 | todo = qcp_rd_p - tx_ring->qcp_rd_p; | |
927 | else | |
928 | todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; | |
929 | ||
930 | while (todo--) { | |
931 | idx = tx_ring->rd_p % tx_ring->cnt; | |
932 | tx_ring->rd_p++; | |
933 | ||
934 | skb = tx_ring->txbufs[idx].skb; | |
935 | if (!skb) | |
936 | continue; | |
937 | ||
938 | nr_frags = skb_shinfo(skb)->nr_frags; | |
939 | fidx = tx_ring->txbufs[idx].fidx; | |
940 | ||
941 | if (fidx == -1) { | |
942 | /* unmap head */ | |
943 | dma_unmap_single(&nn->pdev->dev, | |
944 | tx_ring->txbufs[idx].dma_addr, | |
945 | skb_headlen(skb), DMA_TO_DEVICE); | |
946 | ||
947 | done_pkts += tx_ring->txbufs[idx].pkt_cnt; | |
948 | done_bytes += tx_ring->txbufs[idx].real_len; | |
949 | } else { | |
950 | /* unmap fragment */ | |
951 | frag = &skb_shinfo(skb)->frags[fidx]; | |
952 | dma_unmap_page(&nn->pdev->dev, | |
953 | tx_ring->txbufs[idx].dma_addr, | |
954 | skb_frag_size(frag), DMA_TO_DEVICE); | |
955 | } | |
956 | ||
957 | /* check for last gather fragment */ | |
958 | if (fidx == nr_frags - 1) | |
959 | dev_kfree_skb_any(skb); | |
960 | ||
961 | tx_ring->txbufs[idx].dma_addr = 0; | |
962 | tx_ring->txbufs[idx].skb = NULL; | |
963 | tx_ring->txbufs[idx].fidx = -2; | |
964 | } | |
965 | ||
966 | tx_ring->qcp_rd_p = qcp_rd_p; | |
967 | ||
968 | u64_stats_update_begin(&r_vec->tx_sync); | |
969 | r_vec->tx_bytes += done_bytes; | |
970 | r_vec->tx_pkts += done_pkts; | |
971 | u64_stats_update_end(&r_vec->tx_sync); | |
972 | ||
973 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); | |
974 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); | |
975 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
976 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
977 | smp_mb(); | |
978 | ||
979 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
980 | netif_tx_wake_queue(nd_q); | |
981 | } | |
982 | ||
983 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
984 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
985 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
986 | } | |
987 | ||
988 | /** | |
827deea9 JK |
989 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
990 | * @nn: NFP Net device | |
991 | * @tx_ring: TX ring structure | |
4c352362 JK |
992 | * |
993 | * Assumes that the device is stopped | |
994 | */ | |
827deea9 JK |
995 | static void |
996 | nfp_net_tx_ring_reset(struct nfp_net *nn, struct nfp_net_tx_ring *tx_ring) | |
4c352362 | 997 | { |
4c352362 JK |
998 | const struct skb_frag_struct *frag; |
999 | struct netdev_queue *nd_q; | |
827deea9 | 1000 | struct pci_dev *pdev = nn->pdev; |
4c352362 JK |
1001 | |
1002 | while (tx_ring->rd_p != tx_ring->wr_p) { | |
827deea9 JK |
1003 | int nr_frags, fidx, idx; |
1004 | struct sk_buff *skb; | |
4c352362 | 1005 | |
827deea9 | 1006 | idx = tx_ring->rd_p % tx_ring->cnt; |
4c352362 | 1007 | skb = tx_ring->txbufs[idx].skb; |
827deea9 JK |
1008 | nr_frags = skb_shinfo(skb)->nr_frags; |
1009 | fidx = tx_ring->txbufs[idx].fidx; | |
1010 | ||
1011 | if (fidx == -1) { | |
1012 | /* unmap head */ | |
1013 | dma_unmap_single(&pdev->dev, | |
1014 | tx_ring->txbufs[idx].dma_addr, | |
1015 | skb_headlen(skb), DMA_TO_DEVICE); | |
1016 | } else { | |
1017 | /* unmap fragment */ | |
1018 | frag = &skb_shinfo(skb)->frags[fidx]; | |
1019 | dma_unmap_page(&pdev->dev, | |
1020 | tx_ring->txbufs[idx].dma_addr, | |
1021 | skb_frag_size(frag), DMA_TO_DEVICE); | |
4c352362 JK |
1022 | } |
1023 | ||
827deea9 JK |
1024 | /* check for last gather fragment */ |
1025 | if (fidx == nr_frags - 1) | |
1026 | dev_kfree_skb_any(skb); | |
1027 | ||
1028 | tx_ring->txbufs[idx].dma_addr = 0; | |
1029 | tx_ring->txbufs[idx].skb = NULL; | |
1030 | tx_ring->txbufs[idx].fidx = -2; | |
4c352362 JK |
1031 | |
1032 | tx_ring->qcp_rd_p++; | |
1033 | tx_ring->rd_p++; | |
1034 | } | |
1035 | ||
827deea9 JK |
1036 | memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt); |
1037 | tx_ring->wr_p = 0; | |
1038 | tx_ring->rd_p = 0; | |
1039 | tx_ring->qcp_rd_p = 0; | |
1040 | tx_ring->wr_ptr_add = 0; | |
1041 | ||
4c352362 JK |
1042 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); |
1043 | netdev_tx_reset_queue(nd_q); | |
1044 | } | |
1045 | ||
1046 | static void nfp_net_tx_timeout(struct net_device *netdev) | |
1047 | { | |
1048 | struct nfp_net *nn = netdev_priv(netdev); | |
1049 | int i; | |
1050 | ||
1051 | for (i = 0; i < nn->num_tx_rings; i++) { | |
1052 | if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) | |
1053 | continue; | |
1054 | nn_warn(nn, "TX timeout on ring: %d\n", i); | |
1055 | } | |
1056 | nn_warn(nn, "TX watchdog timeout\n"); | |
1057 | } | |
1058 | ||
1059 | /* Receive processing | |
1060 | */ | |
1061 | ||
1062 | /** | |
1063 | * nfp_net_rx_space() - return the number of free slots on the RX ring | |
1064 | * @rx_ring: RX ring structure | |
1065 | * | |
1066 | * Make sure we leave at least one slot free. | |
1067 | * | |
1068 | * Return: True if there is space on the RX ring | |
1069 | */ | |
1070 | static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring) | |
1071 | { | |
1072 | return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p); | |
1073 | } | |
1074 | ||
1075 | /** | |
1076 | * nfp_net_rx_alloc_one() - Allocate and map skb for RX | |
1077 | * @rx_ring: RX ring structure of the skb | |
1078 | * @dma_addr: Pointer to storage for DMA address (output param) | |
30d21171 | 1079 | * @fl_bufsz: size of freelist buffers |
4c352362 JK |
1080 | * |
1081 | * This function will allcate a new skb, map it for DMA. | |
1082 | * | |
1083 | * Return: allocated skb or NULL on failure. | |
1084 | */ | |
1085 | static struct sk_buff * | |
30d21171 JK |
1086 | nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr, |
1087 | unsigned int fl_bufsz) | |
4c352362 JK |
1088 | { |
1089 | struct nfp_net *nn = rx_ring->r_vec->nfp_net; | |
1090 | struct sk_buff *skb; | |
1091 | ||
30d21171 | 1092 | skb = netdev_alloc_skb(nn->netdev, fl_bufsz); |
4c352362 JK |
1093 | if (!skb) { |
1094 | nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); | |
1095 | return NULL; | |
1096 | } | |
1097 | ||
1098 | *dma_addr = dma_map_single(&nn->pdev->dev, skb->data, | |
30d21171 | 1099 | fl_bufsz, DMA_FROM_DEVICE); |
4c352362 JK |
1100 | if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { |
1101 | dev_kfree_skb_any(skb); | |
1102 | nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); | |
1103 | return NULL; | |
1104 | } | |
1105 | ||
1106 | return skb; | |
1107 | } | |
1108 | ||
1109 | /** | |
1110 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
1111 | * @rx_ring: RX ring structure | |
1112 | * @skb: Skb to put on rings | |
1113 | * @dma_addr: DMA address of skb mapping | |
1114 | */ | |
1115 | static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring, | |
1116 | struct sk_buff *skb, dma_addr_t dma_addr) | |
1117 | { | |
1118 | unsigned int wr_idx; | |
1119 | ||
1120 | wr_idx = rx_ring->wr_p % rx_ring->cnt; | |
1121 | ||
1122 | /* Stash SKB and DMA address away */ | |
1123 | rx_ring->rxbufs[wr_idx].skb = skb; | |
1124 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; | |
1125 | ||
1126 | /* Fill freelist descriptor */ | |
1127 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1128 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
1129 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr); | |
1130 | ||
1131 | rx_ring->wr_p++; | |
1132 | rx_ring->wr_ptr_add++; | |
1133 | if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) { | |
1134 | /* Update write pointer of the freelist queue. Make | |
1135 | * sure all writes are flushed before telling the hardware. | |
1136 | */ | |
1137 | wmb(); | |
1138 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add); | |
1139 | rx_ring->wr_ptr_add = 0; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | /** | |
1934680f JK |
1144 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1145 | * @rx_ring: RX ring structure | |
4c352362 | 1146 | * |
1934680f JK |
1147 | * Warning: Do *not* call if ring buffers were never put on the FW freelist |
1148 | * (i.e. device was not enabled)! | |
4c352362 | 1149 | */ |
1934680f | 1150 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1151 | { |
1934680f | 1152 | unsigned int wr_idx, last_idx; |
4c352362 | 1153 | |
1934680f JK |
1154 | /* Move the empty entry to the end of the list */ |
1155 | wr_idx = rx_ring->wr_p % rx_ring->cnt; | |
1156 | last_idx = rx_ring->cnt - 1; | |
1157 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
1158 | rx_ring->rxbufs[wr_idx].skb = rx_ring->rxbufs[last_idx].skb; | |
1159 | rx_ring->rxbufs[last_idx].dma_addr = 0; | |
1160 | rx_ring->rxbufs[last_idx].skb = NULL; | |
4c352362 | 1161 | |
1934680f JK |
1162 | memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt); |
1163 | rx_ring->wr_p = 0; | |
1164 | rx_ring->rd_p = 0; | |
1165 | rx_ring->wr_ptr_add = 0; | |
1166 | } | |
4c352362 | 1167 | |
1934680f JK |
1168 | /** |
1169 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
1170 | * @nn: NFP Net device | |
1171 | * @rx_ring: RX ring to remove buffers from | |
1172 | * | |
1173 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1174 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1175 | * to restore required ring geometry. | |
1176 | */ | |
1177 | static void | |
1178 | nfp_net_rx_ring_bufs_free(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
1179 | { | |
1180 | struct pci_dev *pdev = nn->pdev; | |
1181 | unsigned int i; | |
4c352362 | 1182 | |
1934680f JK |
1183 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1184 | /* NULL skb can only happen when initial filling of the ring | |
1185 | * fails to allocate enough buffers and calls here to free | |
1186 | * already allocated ones. | |
1187 | */ | |
1188 | if (!rx_ring->rxbufs[i].skb) | |
1189 | continue; | |
1190 | ||
1191 | dma_unmap_single(&pdev->dev, rx_ring->rxbufs[i].dma_addr, | |
30d21171 | 1192 | rx_ring->bufsz, DMA_FROM_DEVICE); |
1934680f JK |
1193 | dev_kfree_skb_any(rx_ring->rxbufs[i].skb); |
1194 | rx_ring->rxbufs[i].dma_addr = 0; | |
1195 | rx_ring->rxbufs[i].skb = NULL; | |
4c352362 JK |
1196 | } |
1197 | } | |
1198 | ||
1199 | /** | |
1934680f JK |
1200 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
1201 | * @nn: NFP Net device | |
1202 | * @rx_ring: RX ring to remove buffers from | |
4c352362 | 1203 | */ |
1934680f JK |
1204 | static int |
1205 | nfp_net_rx_ring_bufs_alloc(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
4c352362 | 1206 | { |
1934680f JK |
1207 | struct nfp_net_rx_buf *rxbufs; |
1208 | unsigned int i; | |
1209 | ||
1210 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1211 | |
1934680f JK |
1212 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1213 | rxbufs[i].skb = | |
30d21171 JK |
1214 | nfp_net_rx_alloc_one(rx_ring, &rxbufs[i].dma_addr, |
1215 | rx_ring->bufsz); | |
1934680f JK |
1216 | if (!rxbufs[i].skb) { |
1217 | nfp_net_rx_ring_bufs_free(nn, rx_ring); | |
4c352362 JK |
1218 | return -ENOMEM; |
1219 | } | |
4c352362 JK |
1220 | } |
1221 | ||
1222 | return 0; | |
1223 | } | |
1224 | ||
1934680f JK |
1225 | /** |
1226 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
1227 | * @rx_ring: RX ring to fill | |
1228 | */ | |
1229 | static void nfp_net_rx_ring_fill_freelist(struct nfp_net_rx_ring *rx_ring) | |
1230 | { | |
1231 | unsigned int i; | |
1232 | ||
1233 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
1234 | nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[i].skb, | |
1235 | rx_ring->rxbufs[i].dma_addr); | |
1236 | } | |
1237 | ||
4c352362 JK |
1238 | /** |
1239 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1240 | * @flags: RX descriptor flags field in CPU byte order | |
1241 | */ | |
1242 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1243 | { | |
1244 | u16 csum_all_checked, csum_all_ok; | |
1245 | ||
1246 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1247 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1248 | ||
1249 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1250 | } | |
1251 | ||
1252 | /** | |
1253 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
1254 | * @nn: NFP Net device | |
1255 | * @r_vec: per-ring structure | |
1256 | * @rxd: Pointer to RX descriptor | |
1257 | * @skb: Pointer to SKB | |
1258 | */ | |
1259 | static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1260 | struct nfp_net_rx_desc *rxd, struct sk_buff *skb) | |
1261 | { | |
1262 | skb_checksum_none_assert(skb); | |
1263 | ||
1264 | if (!(nn->netdev->features & NETIF_F_RXCSUM)) | |
1265 | return; | |
1266 | ||
1267 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { | |
1268 | u64_stats_update_begin(&r_vec->rx_sync); | |
1269 | r_vec->hw_csum_rx_error++; | |
1270 | u64_stats_update_end(&r_vec->rx_sync); | |
1271 | return; | |
1272 | } | |
1273 | ||
1274 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1275 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1276 | * checksum as CSUM_OK. | |
1277 | */ | |
1278 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1279 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1280 | __skb_incr_checksum_unnecessary(skb); | |
1281 | u64_stats_update_begin(&r_vec->rx_sync); | |
1282 | r_vec->hw_csum_rx_ok++; | |
1283 | u64_stats_update_end(&r_vec->rx_sync); | |
1284 | } | |
1285 | ||
1286 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1287 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1288 | __skb_incr_checksum_unnecessary(skb); | |
1289 | u64_stats_update_begin(&r_vec->rx_sync); | |
1290 | r_vec->hw_csum_rx_inner_ok++; | |
1291 | u64_stats_update_end(&r_vec->rx_sync); | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | /** | |
1296 | * nfp_net_set_hash() - Set SKB hash data | |
1297 | * @netdev: adapter's net_device structure | |
1298 | * @skb: SKB to set the hash data on | |
1299 | * @rxd: RX descriptor | |
1300 | * | |
1301 | * The RSS hash and hash-type are pre-pended to the packet data. | |
1302 | * Extract and decode it and set the skb fields. | |
1303 | */ | |
1304 | static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, | |
1305 | struct nfp_net_rx_desc *rxd) | |
1306 | { | |
1307 | struct nfp_net_rx_hash *rx_hash; | |
1308 | ||
1309 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS) || | |
1310 | !(netdev->features & NETIF_F_RXHASH)) | |
1311 | return; | |
1312 | ||
1313 | rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); | |
1314 | ||
1315 | switch (be32_to_cpu(rx_hash->hash_type)) { | |
1316 | case NFP_NET_RSS_IPV4: | |
1317 | case NFP_NET_RSS_IPV6: | |
1318 | case NFP_NET_RSS_IPV6_EX: | |
1319 | skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3); | |
1320 | break; | |
1321 | default: | |
1322 | skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4); | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | /** | |
1328 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1329 | * @rx_ring: RX ring to receive from | |
1330 | * @budget: NAPI budget | |
1331 | * | |
1332 | * Note, this function is separated out from the napi poll function to | |
1333 | * more cleanly separate packet receive code from other bookkeeping | |
1334 | * functions performed in the napi poll function. | |
1335 | * | |
1336 | * There are differences between the NFP-3200 firmware and the | |
1337 | * NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue | |
1338 | * to indicate that new packets have arrived. The NFP-6000 does not | |
1339 | * have this queue and uses the DD bit in the RX descriptor. This | |
1340 | * method cannot be used on the NFP-3200 as it causes a race | |
1341 | * condition: The RX ring write pointer on the NFP-3200 is updated | |
1342 | * after packets (and descriptors) have been DMAed. If the DD bit is | |
1343 | * used and subsequently the read pointer is updated this may lead to | |
1344 | * the RX queue to underflow (if the firmware has not yet update the | |
1345 | * write pointer). Therefore we use slightly ugly conditional code | |
1346 | * below to handle the differences. We may, in the future update the | |
1347 | * NFP-3200 firmware to behave the same as the firmware on the | |
1348 | * NFP-6000. | |
1349 | * | |
1350 | * Return: Number of packets received. | |
1351 | */ | |
1352 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1353 | { | |
1354 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1355 | struct nfp_net *nn = r_vec->nfp_net; | |
1356 | unsigned int data_len, meta_len; | |
1357 | int avail = 0, pkts_polled = 0; | |
1358 | struct sk_buff *skb, *new_skb; | |
1359 | struct nfp_net_rx_desc *rxd; | |
1360 | dma_addr_t new_dma_addr; | |
1361 | u32 qcp_wr_p; | |
1362 | int idx; | |
1363 | ||
1364 | if (nn->is_nfp3200) { | |
1365 | /* Work out how many packets arrived */ | |
1366 | qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); | |
1367 | idx = rx_ring->rd_p % rx_ring->cnt; | |
1368 | ||
1369 | if (qcp_wr_p == idx) | |
1370 | /* No new packets */ | |
1371 | return 0; | |
1372 | ||
1373 | if (qcp_wr_p > idx) | |
1374 | avail = qcp_wr_p - idx; | |
1375 | else | |
1376 | avail = qcp_wr_p + rx_ring->cnt - idx; | |
1377 | } else { | |
1378 | avail = budget + 1; | |
1379 | } | |
1380 | ||
1381 | while (avail > 0 && pkts_polled < budget) { | |
1382 | idx = rx_ring->rd_p % rx_ring->cnt; | |
1383 | ||
1384 | rxd = &rx_ring->rxds[idx]; | |
1385 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) { | |
1386 | if (nn->is_nfp3200) | |
1387 | nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n", | |
1388 | rx_ring->idx, idx, | |
1389 | rxd->vals[0], rxd->vals[1]); | |
1390 | break; | |
1391 | } | |
1392 | /* Memory barrier to ensure that we won't do other reads | |
1393 | * before the DD bit. | |
1394 | */ | |
1395 | dma_rmb(); | |
1396 | ||
1397 | rx_ring->rd_p++; | |
1398 | pkts_polled++; | |
1399 | avail--; | |
1400 | ||
1401 | skb = rx_ring->rxbufs[idx].skb; | |
1402 | ||
30d21171 JK |
1403 | new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr, |
1404 | nn->fl_bufsz); | |
4c352362 JK |
1405 | if (!new_skb) { |
1406 | nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[idx].skb, | |
1407 | rx_ring->rxbufs[idx].dma_addr); | |
1408 | u64_stats_update_begin(&r_vec->rx_sync); | |
1409 | r_vec->rx_drops++; | |
1410 | u64_stats_update_end(&r_vec->rx_sync); | |
1411 | continue; | |
1412 | } | |
1413 | ||
1414 | dma_unmap_single(&nn->pdev->dev, | |
1415 | rx_ring->rxbufs[idx].dma_addr, | |
1416 | nn->fl_bufsz, DMA_FROM_DEVICE); | |
1417 | ||
1418 | nfp_net_rx_give_one(rx_ring, new_skb, new_dma_addr); | |
1419 | ||
180012dc JK |
1420 | /* < meta_len > |
1421 | * <-- [rx_offset] --> | |
1422 | * --------------------------------------------------------- | |
1423 | * | [XX] | metadata | packet | XXXX | | |
1424 | * --------------------------------------------------------- | |
1425 | * <---------------- data_len ---------------> | |
1426 | * | |
1427 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1428 | * on a packet by packet basis. If rx_offset is set to zero | |
1429 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1430 | * buffer and is immediately followed by the packet (no [XX]). | |
1431 | */ | |
4c352362 JK |
1432 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1433 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
1434 | ||
180012dc | 1435 | if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
4c352362 | 1436 | skb_reserve(skb, meta_len); |
180012dc | 1437 | else |
4c352362 | 1438 | skb_reserve(skb, nn->rx_offset); |
4c352362 JK |
1439 | skb_put(skb, data_len - meta_len); |
1440 | ||
1441 | nfp_net_set_hash(nn->netdev, skb, rxd); | |
1442 | ||
4c352362 JK |
1443 | /* Stats update */ |
1444 | u64_stats_update_begin(&r_vec->rx_sync); | |
1445 | r_vec->rx_pkts++; | |
1446 | r_vec->rx_bytes += skb->len; | |
1447 | u64_stats_update_end(&r_vec->rx_sync); | |
1448 | ||
1449 | skb_record_rx_queue(skb, rx_ring->idx); | |
1450 | skb->protocol = eth_type_trans(skb, nn->netdev); | |
1451 | ||
1452 | nfp_net_rx_csum(nn, r_vec, rxd, skb); | |
1453 | ||
1454 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) | |
1455 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
1456 | le16_to_cpu(rxd->rxd.vlan)); | |
1457 | ||
1458 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
1459 | } | |
1460 | ||
1461 | if (nn->is_nfp3200) | |
1462 | nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled); | |
1463 | ||
1464 | return pkts_polled; | |
1465 | } | |
1466 | ||
1467 | /** | |
1468 | * nfp_net_poll() - napi poll function | |
1469 | * @napi: NAPI structure | |
1470 | * @budget: NAPI budget | |
1471 | * | |
1472 | * Return: number of packets polled. | |
1473 | */ | |
1474 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
1475 | { | |
1476 | struct nfp_net_r_vector *r_vec = | |
1477 | container_of(napi, struct nfp_net_r_vector, napi); | |
1478 | struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; | |
1479 | struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring; | |
1480 | struct nfp_net *nn = r_vec->nfp_net; | |
1481 | struct netdev_queue *txq; | |
1482 | unsigned int pkts_polled; | |
1483 | ||
1484 | tx_ring = &nn->tx_rings[rx_ring->idx]; | |
1485 | txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx); | |
1486 | nfp_net_tx_complete(tx_ring); | |
1487 | ||
1488 | pkts_polled = nfp_net_rx(rx_ring, budget); | |
1489 | ||
1490 | if (pkts_polled < budget) { | |
1491 | napi_complete_done(napi, pkts_polled); | |
1492 | nfp_net_irq_unmask(nn, r_vec->irq_idx); | |
1493 | } | |
1494 | ||
1495 | return pkts_polled; | |
1496 | } | |
1497 | ||
1498 | /* Setup and Configuration | |
1499 | */ | |
1500 | ||
1501 | /** | |
1502 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
1503 | * @tx_ring: TX ring to free | |
1504 | */ | |
1505 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
1506 | { | |
1507 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1508 | struct nfp_net *nn = r_vec->nfp_net; | |
1509 | struct pci_dev *pdev = nn->pdev; | |
1510 | ||
4c352362 JK |
1511 | kfree(tx_ring->txbufs); |
1512 | ||
1513 | if (tx_ring->txds) | |
1514 | dma_free_coherent(&pdev->dev, tx_ring->size, | |
1515 | tx_ring->txds, tx_ring->dma); | |
1516 | ||
1517 | tx_ring->cnt = 0; | |
4c352362 JK |
1518 | tx_ring->txbufs = NULL; |
1519 | tx_ring->txds = NULL; | |
1520 | tx_ring->dma = 0; | |
1521 | tx_ring->size = 0; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
1526 | * @tx_ring: TX Ring structure to allocate | |
a98cb258 | 1527 | * @cnt: Ring buffer count |
4c352362 JK |
1528 | * |
1529 | * Return: 0 on success, negative errno otherwise. | |
1530 | */ | |
a98cb258 | 1531 | static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring, u32 cnt) |
4c352362 JK |
1532 | { |
1533 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1534 | struct nfp_net *nn = r_vec->nfp_net; | |
1535 | struct pci_dev *pdev = nn->pdev; | |
1536 | int sz; | |
1537 | ||
a98cb258 | 1538 | tx_ring->cnt = cnt; |
4c352362 JK |
1539 | |
1540 | tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; | |
1541 | tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, | |
1542 | &tx_ring->dma, GFP_KERNEL); | |
1543 | if (!tx_ring->txds) | |
1544 | goto err_alloc; | |
1545 | ||
1546 | sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; | |
1547 | tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); | |
1548 | if (!tx_ring->txbufs) | |
1549 | goto err_alloc; | |
1550 | ||
4c352362 JK |
1551 | netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); |
1552 | ||
1553 | nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", | |
1554 | tx_ring->idx, tx_ring->qcidx, | |
1555 | tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); | |
1556 | ||
1557 | return 0; | |
1558 | ||
1559 | err_alloc: | |
1560 | nfp_net_tx_ring_free(tx_ring); | |
1561 | return -ENOMEM; | |
1562 | } | |
1563 | ||
cc7c0333 JK |
1564 | static struct nfp_net_tx_ring * |
1565 | nfp_net_shadow_tx_rings_prepare(struct nfp_net *nn, u32 buf_cnt) | |
1566 | { | |
1567 | struct nfp_net_tx_ring *rings; | |
1568 | unsigned int r; | |
1569 | ||
1570 | rings = kcalloc(nn->num_tx_rings, sizeof(*rings), GFP_KERNEL); | |
1571 | if (!rings) | |
1572 | return NULL; | |
1573 | ||
1574 | for (r = 0; r < nn->num_tx_rings; r++) { | |
1575 | nfp_net_tx_ring_init(&rings[r], nn->tx_rings[r].r_vec, r); | |
1576 | ||
1577 | if (nfp_net_tx_ring_alloc(&rings[r], buf_cnt)) | |
1578 | goto err_free_prev; | |
1579 | } | |
1580 | ||
1581 | return rings; | |
1582 | ||
1583 | err_free_prev: | |
1584 | while (r--) | |
1585 | nfp_net_tx_ring_free(&rings[r]); | |
1586 | kfree(rings); | |
1587 | return NULL; | |
1588 | } | |
1589 | ||
1590 | static struct nfp_net_tx_ring * | |
1591 | nfp_net_shadow_tx_rings_swap(struct nfp_net *nn, struct nfp_net_tx_ring *rings) | |
1592 | { | |
1593 | struct nfp_net_tx_ring *old = nn->tx_rings; | |
1594 | unsigned int r; | |
1595 | ||
1596 | for (r = 0; r < nn->num_tx_rings; r++) | |
1597 | old[r].r_vec->tx_ring = &rings[r]; | |
1598 | ||
1599 | nn->tx_rings = rings; | |
1600 | return old; | |
1601 | } | |
1602 | ||
1603 | static void | |
1604 | nfp_net_shadow_tx_rings_free(struct nfp_net *nn, struct nfp_net_tx_ring *rings) | |
1605 | { | |
1606 | unsigned int r; | |
1607 | ||
1608 | if (!rings) | |
1609 | return; | |
1610 | ||
1611 | for (r = 0; r < nn->num_tx_rings; r++) | |
1612 | nfp_net_tx_ring_free(&rings[r]); | |
1613 | ||
1614 | kfree(rings); | |
1615 | } | |
1616 | ||
4c352362 JK |
1617 | /** |
1618 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
1619 | * @rx_ring: RX ring to free | |
1620 | */ | |
1621 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
1622 | { | |
1623 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1624 | struct nfp_net *nn = r_vec->nfp_net; | |
1625 | struct pci_dev *pdev = nn->pdev; | |
1626 | ||
4c352362 JK |
1627 | kfree(rx_ring->rxbufs); |
1628 | ||
1629 | if (rx_ring->rxds) | |
1630 | dma_free_coherent(&pdev->dev, rx_ring->size, | |
1631 | rx_ring->rxds, rx_ring->dma); | |
1632 | ||
1633 | rx_ring->cnt = 0; | |
4c352362 JK |
1634 | rx_ring->rxbufs = NULL; |
1635 | rx_ring->rxds = NULL; | |
1636 | rx_ring->dma = 0; | |
1637 | rx_ring->size = 0; | |
1638 | } | |
1639 | ||
1640 | /** | |
1641 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
1642 | * @rx_ring: RX ring to allocate | |
30d21171 | 1643 | * @fl_bufsz: Size of buffers to allocate |
a98cb258 | 1644 | * @cnt: Ring buffer count |
4c352362 JK |
1645 | * |
1646 | * Return: 0 on success, negative errno otherwise. | |
1647 | */ | |
30d21171 | 1648 | static int |
a98cb258 JK |
1649 | nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring, unsigned int fl_bufsz, |
1650 | u32 cnt) | |
4c352362 JK |
1651 | { |
1652 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1653 | struct nfp_net *nn = r_vec->nfp_net; | |
1654 | struct pci_dev *pdev = nn->pdev; | |
1655 | int sz; | |
1656 | ||
a98cb258 | 1657 | rx_ring->cnt = cnt; |
30d21171 | 1658 | rx_ring->bufsz = fl_bufsz; |
4c352362 JK |
1659 | |
1660 | rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; | |
1661 | rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, | |
1662 | &rx_ring->dma, GFP_KERNEL); | |
1663 | if (!rx_ring->rxds) | |
1664 | goto err_alloc; | |
1665 | ||
1666 | sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; | |
1667 | rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); | |
1668 | if (!rx_ring->rxbufs) | |
1669 | goto err_alloc; | |
1670 | ||
4c352362 JK |
1671 | nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", |
1672 | rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, | |
1673 | rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); | |
1674 | ||
1675 | return 0; | |
1676 | ||
1677 | err_alloc: | |
1678 | nfp_net_rx_ring_free(rx_ring); | |
1679 | return -ENOMEM; | |
1680 | } | |
1681 | ||
36a857e4 | 1682 | static struct nfp_net_rx_ring * |
a98cb258 JK |
1683 | nfp_net_shadow_rx_rings_prepare(struct nfp_net *nn, unsigned int fl_bufsz, |
1684 | u32 buf_cnt) | |
36a857e4 JK |
1685 | { |
1686 | struct nfp_net_rx_ring *rings; | |
1687 | unsigned int r; | |
1688 | ||
1689 | rings = kcalloc(nn->num_rx_rings, sizeof(*rings), GFP_KERNEL); | |
1690 | if (!rings) | |
1691 | return NULL; | |
1692 | ||
1693 | for (r = 0; r < nn->num_rx_rings; r++) { | |
1694 | nfp_net_rx_ring_init(&rings[r], nn->rx_rings[r].r_vec, r); | |
1695 | ||
a98cb258 | 1696 | if (nfp_net_rx_ring_alloc(&rings[r], fl_bufsz, buf_cnt)) |
36a857e4 JK |
1697 | goto err_free_prev; |
1698 | ||
1699 | if (nfp_net_rx_ring_bufs_alloc(nn, &rings[r])) | |
1700 | goto err_free_ring; | |
1701 | } | |
1702 | ||
1703 | return rings; | |
1704 | ||
1705 | err_free_prev: | |
1706 | while (r--) { | |
1707 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); | |
1708 | err_free_ring: | |
1709 | nfp_net_rx_ring_free(&rings[r]); | |
1710 | } | |
1711 | kfree(rings); | |
1712 | return NULL; | |
1713 | } | |
1714 | ||
1715 | static struct nfp_net_rx_ring * | |
1716 | nfp_net_shadow_rx_rings_swap(struct nfp_net *nn, struct nfp_net_rx_ring *rings) | |
1717 | { | |
1718 | struct nfp_net_rx_ring *old = nn->rx_rings; | |
1719 | unsigned int r; | |
1720 | ||
1721 | for (r = 0; r < nn->num_rx_rings; r++) | |
1722 | old[r].r_vec->rx_ring = &rings[r]; | |
1723 | ||
1724 | nn->rx_rings = rings; | |
1725 | return old; | |
1726 | } | |
1727 | ||
1728 | static void | |
1729 | nfp_net_shadow_rx_rings_free(struct nfp_net *nn, struct nfp_net_rx_ring *rings) | |
1730 | { | |
1731 | unsigned int r; | |
1732 | ||
cc7c0333 JK |
1733 | if (!rings) |
1734 | return; | |
1735 | ||
36a857e4 JK |
1736 | for (r = 0; r < nn->num_r_vecs; r++) { |
1737 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); | |
1738 | nfp_net_rx_ring_free(&rings[r]); | |
1739 | } | |
1740 | ||
1741 | kfree(rings); | |
1742 | } | |
1743 | ||
0afbfb18 JK |
1744 | static int |
1745 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1746 | int idx) | |
4c352362 | 1747 | { |
0afbfb18 JK |
1748 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
1749 | int err; | |
4c352362 | 1750 | |
73725d9d JK |
1751 | r_vec->tx_ring = &nn->tx_rings[idx]; |
1752 | nfp_net_tx_ring_init(r_vec->tx_ring, r_vec, idx); | |
1753 | ||
1754 | r_vec->rx_ring = &nn->rx_rings[idx]; | |
1755 | nfp_net_rx_ring_init(r_vec->rx_ring, r_vec, idx); | |
1756 | ||
0afbfb18 JK |
1757 | snprintf(r_vec->name, sizeof(r_vec->name), |
1758 | "%s-rxtx-%d", nn->netdev->name, idx); | |
1759 | err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec); | |
1760 | if (err) { | |
1761 | nn_err(nn, "Error requesting IRQ %d\n", entry->vector); | |
1762 | return err; | |
1763 | } | |
aba52df8 | 1764 | disable_irq(entry->vector); |
4c352362 | 1765 | |
0afbfb18 JK |
1766 | /* Setup NAPI */ |
1767 | netif_napi_add(nn->netdev, &r_vec->napi, | |
1768 | nfp_net_poll, NAPI_POLL_WEIGHT); | |
4c352362 | 1769 | |
0afbfb18 | 1770 | irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); |
4c352362 | 1771 | |
0afbfb18 | 1772 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry); |
4c352362 | 1773 | |
0afbfb18 | 1774 | return 0; |
4c352362 JK |
1775 | } |
1776 | ||
0afbfb18 JK |
1777 | static void |
1778 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 1779 | { |
0afbfb18 | 1780 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
4c352362 | 1781 | |
4c352362 | 1782 | irq_set_affinity_hint(entry->vector, NULL); |
4c352362 | 1783 | netif_napi_del(&r_vec->napi); |
0afbfb18 | 1784 | free_irq(entry->vector, r_vec); |
4c352362 JK |
1785 | } |
1786 | ||
1787 | /** | |
1788 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
1789 | * @nn: NFP Net device to reconfigure | |
1790 | */ | |
1791 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
1792 | { | |
1793 | int i; | |
1794 | ||
1795 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
1796 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
1797 | get_unaligned_le32(nn->rss_itbl + i)); | |
1798 | } | |
1799 | ||
1800 | /** | |
1801 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
1802 | * @nn: NFP Net device to reconfigure | |
1803 | */ | |
1804 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
1805 | { | |
1806 | int i; | |
1807 | ||
1808 | for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) | |
1809 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, | |
1810 | get_unaligned_le32(nn->rss_key + i)); | |
1811 | } | |
1812 | ||
1813 | /** | |
1814 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
1815 | * @nn: NFP Net device to reconfigure | |
1816 | */ | |
1817 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
1818 | { | |
1819 | u8 i; | |
1820 | u32 factor; | |
1821 | u32 value; | |
1822 | ||
1823 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
1824 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
1825 | * count. | |
1826 | */ | |
1827 | factor = nn->me_freq_mhz / 16; | |
1828 | ||
1829 | /* copy RX interrupt coalesce parameters */ | |
1830 | value = (nn->rx_coalesce_max_frames << 16) | | |
1831 | (factor * nn->rx_coalesce_usecs); | |
1832 | for (i = 0; i < nn->num_r_vecs; i++) | |
1833 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); | |
1834 | ||
1835 | /* copy TX interrupt coalesce parameters */ | |
1836 | value = (nn->tx_coalesce_max_frames << 16) | | |
1837 | (factor * nn->tx_coalesce_usecs); | |
1838 | for (i = 0; i < nn->num_r_vecs; i++) | |
1839 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); | |
1840 | } | |
1841 | ||
1842 | /** | |
f642963b | 1843 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 1844 | * @nn: NFP Net device to reconfigure |
4c352362 | 1845 | * |
f642963b JK |
1846 | * Writes the MAC address from the netdev to the device control BAR. Does not |
1847 | * perform the required reconfig. We do a bit of byte swapping dance because | |
1848 | * firmware is LE. | |
4c352362 | 1849 | */ |
f642963b | 1850 | static void nfp_net_write_mac_addr(struct nfp_net *nn) |
4c352362 JK |
1851 | { |
1852 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, | |
1853 | get_unaligned_be32(nn->netdev->dev_addr)); | |
1854 | /* We can't do writew for NFP-3200 compatibility */ | |
1855 | nn_writel(nn, NFP_NET_CFG_MACADDR + 4, | |
1856 | get_unaligned_be16(nn->netdev->dev_addr + 4) << 16); | |
1857 | } | |
1858 | ||
ca40feab JK |
1859 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
1860 | { | |
1861 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
1862 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
1863 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
1864 | ||
1865 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
1866 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
1867 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
1868 | } | |
1869 | ||
4c352362 JK |
1870 | /** |
1871 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
1872 | * @nn: NFP Net device to reconfigure | |
1873 | */ | |
1874 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
1875 | { | |
1876 | u32 new_ctrl, update; | |
ca40feab | 1877 | unsigned int r; |
4c352362 JK |
1878 | int err; |
1879 | ||
1880 | new_ctrl = nn->ctrl; | |
1881 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; | |
1882 | update = NFP_NET_CFG_UPDATE_GEN; | |
1883 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1884 | update |= NFP_NET_CFG_UPDATE_RING; | |
1885 | ||
1886 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1887 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
1888 | ||
1889 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
1890 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
1891 | ||
1892 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1893 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 1894 | if (err) |
4c352362 | 1895 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 1896 | |
aba52df8 JK |
1897 | for (r = 0; r < nn->num_r_vecs; r++) { |
1898 | nfp_net_rx_ring_reset(nn->r_vecs[r].rx_ring); | |
1899 | nfp_net_tx_ring_reset(nn, nn->r_vecs[r].tx_ring); | |
ca40feab | 1900 | nfp_net_vec_clear_ring_data(nn, r); |
aba52df8 | 1901 | } |
ca40feab | 1902 | |
4c352362 JK |
1903 | nn->ctrl = new_ctrl; |
1904 | } | |
1905 | ||
ca40feab JK |
1906 | static void |
1907 | nfp_net_vec_write_ring_data(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1908 | unsigned int idx) | |
1909 | { | |
1910 | /* Write the DMA address, size and MSI-X info to the device */ | |
1911 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), r_vec->rx_ring->dma); | |
1912 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(r_vec->rx_ring->cnt)); | |
1913 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), r_vec->irq_idx); | |
1914 | ||
1915 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), r_vec->tx_ring->dma); | |
1916 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(r_vec->tx_ring->cnt)); | |
1917 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), r_vec->irq_idx); | |
1918 | } | |
1919 | ||
1cd0cfc4 JK |
1920 | static int __nfp_net_set_config_and_enable(struct nfp_net *nn) |
1921 | { | |
1922 | u32 new_ctrl, update = 0; | |
1923 | unsigned int r; | |
1924 | int err; | |
1925 | ||
1926 | new_ctrl = nn->ctrl; | |
1927 | ||
1928 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
1929 | nfp_net_rss_write_key(nn); | |
1930 | nfp_net_rss_write_itbl(nn); | |
1931 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
1932 | update |= NFP_NET_CFG_UPDATE_RSS; | |
1933 | } | |
1934 | ||
1935 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
1936 | nfp_net_coalesce_write_cfg(nn); | |
1937 | ||
1938 | new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
1939 | update |= NFP_NET_CFG_UPDATE_IRQMOD; | |
1940 | } | |
1941 | ||
1942 | for (r = 0; r < nn->num_r_vecs; r++) | |
1943 | nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r); | |
1944 | ||
1945 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? | |
1946 | 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); | |
1947 | ||
1948 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? | |
1949 | 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); | |
1950 | ||
f642963b | 1951 | nfp_net_write_mac_addr(nn); |
1cd0cfc4 JK |
1952 | |
1953 | nn_writel(nn, NFP_NET_CFG_MTU, nn->netdev->mtu); | |
1954 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); | |
1955 | ||
1956 | /* Enable device */ | |
1957 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
1958 | update |= NFP_NET_CFG_UPDATE_GEN; | |
1959 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1960 | update |= NFP_NET_CFG_UPDATE_RING; | |
1961 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1962 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
1963 | ||
1964 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1965 | err = nfp_net_reconfig(nn, update); | |
1966 | ||
1967 | nn->ctrl = new_ctrl; | |
1968 | ||
aba52df8 JK |
1969 | for (r = 0; r < nn->num_r_vecs; r++) |
1970 | nfp_net_rx_ring_fill_freelist(nn->r_vecs[r].rx_ring); | |
1971 | ||
1cd0cfc4 JK |
1972 | /* Since reconfiguration requests while NFP is down are ignored we |
1973 | * have to wipe the entire VXLAN configuration and reinitialize it. | |
1974 | */ | |
1975 | if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { | |
1976 | memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); | |
1977 | memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); | |
3ab68837 | 1978 | udp_tunnel_get_rx_info(nn->netdev); |
1cd0cfc4 JK |
1979 | } |
1980 | ||
1981 | return err; | |
1982 | } | |
1983 | ||
1984 | /** | |
1985 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
1986 | * @nn: NFP Net device to reconfigure | |
1987 | */ | |
1988 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
1989 | { | |
1990 | int err; | |
1991 | ||
1992 | err = __nfp_net_set_config_and_enable(nn); | |
1993 | if (err) | |
1994 | nfp_net_clear_config_and_disable(nn); | |
1995 | ||
1996 | return err; | |
1997 | } | |
1998 | ||
1cd0cfc4 JK |
1999 | /** |
2000 | * nfp_net_open_stack() - Start the device from stack's perspective | |
2001 | * @nn: NFP Net device to reconfigure | |
2002 | */ | |
2003 | static void nfp_net_open_stack(struct nfp_net *nn) | |
2004 | { | |
2005 | unsigned int r; | |
2006 | ||
aba52df8 JK |
2007 | for (r = 0; r < nn->num_r_vecs; r++) { |
2008 | napi_enable(&nn->r_vecs[r].napi); | |
2009 | enable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
2010 | } | |
1cd0cfc4 JK |
2011 | |
2012 | netif_tx_wake_all_queues(nn->netdev); | |
2013 | ||
ce449ba7 | 2014 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
2015 | nfp_net_read_link_status(nn); |
2016 | } | |
2017 | ||
4c352362 JK |
2018 | static int nfp_net_netdev_open(struct net_device *netdev) |
2019 | { | |
2020 | struct nfp_net *nn = netdev_priv(netdev); | |
2021 | int err, r; | |
4c352362 JK |
2022 | |
2023 | if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { | |
2024 | nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); | |
2025 | return -EBUSY; | |
2026 | } | |
2027 | ||
4c352362 JK |
2028 | /* Step 1: Allocate resources for rings and the like |
2029 | * - Request interrupts | |
2030 | * - Allocate RX and TX ring resources | |
2031 | * - Setup initial RSS table | |
2032 | */ | |
2033 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", | |
2034 | nn->exn_name, sizeof(nn->exn_name), | |
2035 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2036 | if (err) | |
2037 | return err; | |
0ba40af9 JK |
2038 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2039 | nn->lsc_name, sizeof(nn->lsc_name), | |
2040 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2041 | if (err) | |
2042 | goto err_free_exn; | |
ce449ba7 | 2043 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2044 | |
73725d9d JK |
2045 | nn->rx_rings = kcalloc(nn->num_rx_rings, sizeof(*nn->rx_rings), |
2046 | GFP_KERNEL); | |
2047 | if (!nn->rx_rings) | |
2048 | goto err_free_lsc; | |
2049 | nn->tx_rings = kcalloc(nn->num_tx_rings, sizeof(*nn->tx_rings), | |
2050 | GFP_KERNEL); | |
2051 | if (!nn->tx_rings) | |
2052 | goto err_free_rx_rings; | |
2053 | ||
0afbfb18 JK |
2054 | for (r = 0; r < nn->num_r_vecs; r++) { |
2055 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); | |
2056 | if (err) | |
2057 | goto err_free_prev_vecs; | |
2058 | ||
a98cb258 | 2059 | err = nfp_net_tx_ring_alloc(nn->r_vecs[r].tx_ring, nn->txd_cnt); |
0afbfb18 JK |
2060 | if (err) |
2061 | goto err_cleanup_vec_p; | |
2062 | ||
30d21171 | 2063 | err = nfp_net_rx_ring_alloc(nn->r_vecs[r].rx_ring, |
a98cb258 | 2064 | nn->fl_bufsz, nn->rxd_cnt); |
0afbfb18 JK |
2065 | if (err) |
2066 | goto err_free_tx_ring_p; | |
114bdef0 JK |
2067 | |
2068 | err = nfp_net_rx_ring_bufs_alloc(nn, nn->r_vecs[r].rx_ring); | |
2069 | if (err) | |
2070 | goto err_flush_rx_ring_p; | |
0afbfb18 | 2071 | } |
4c352362 JK |
2072 | |
2073 | err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); | |
2074 | if (err) | |
2075 | goto err_free_rings; | |
2076 | ||
2077 | err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); | |
2078 | if (err) | |
2079 | goto err_free_rings; | |
2080 | ||
4c352362 JK |
2081 | /* Step 2: Configure the NFP |
2082 | * - Enable rings from 0 to tx_rings/rx_rings - 1. | |
2083 | * - Write MAC address (in case it changed) | |
2084 | * - Set the MTU | |
2085 | * - Set the Freelist buffer size | |
2086 | * - Enable the FW | |
2087 | */ | |
1cd0cfc4 | 2088 | err = nfp_net_set_config_and_enable(nn); |
4c352362 | 2089 | if (err) |
1cd0cfc4 | 2090 | goto err_free_rings; |
4c352362 JK |
2091 | |
2092 | /* Step 3: Enable for kernel | |
2093 | * - put some freelist descriptors on each RX ring | |
2094 | * - enable NAPI on each ring | |
2095 | * - enable all TX queues | |
2096 | * - set link state | |
2097 | */ | |
1cd0cfc4 | 2098 | nfp_net_open_stack(nn); |
4c352362 JK |
2099 | |
2100 | return 0; | |
2101 | ||
4c352362 | 2102 | err_free_rings: |
0afbfb18 JK |
2103 | r = nn->num_r_vecs; |
2104 | err_free_prev_vecs: | |
2105 | while (r--) { | |
114bdef0 JK |
2106 | nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring); |
2107 | err_flush_rx_ring_p: | |
0afbfb18 JK |
2108 | nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); |
2109 | err_free_tx_ring_p: | |
2110 | nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); | |
2111 | err_cleanup_vec_p: | |
2112 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
2113 | } | |
73725d9d JK |
2114 | kfree(nn->tx_rings); |
2115 | err_free_rx_rings: | |
2116 | kfree(nn->rx_rings); | |
2117 | err_free_lsc: | |
0ba40af9 | 2118 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 JK |
2119 | err_free_exn: |
2120 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2121 | return err; | |
2122 | } | |
2123 | ||
2124 | /** | |
1cd0cfc4 JK |
2125 | * nfp_net_close_stack() - Quiescent the stack (part of close) |
2126 | * @nn: NFP Net device to reconfigure | |
4c352362 | 2127 | */ |
1cd0cfc4 | 2128 | static void nfp_net_close_stack(struct nfp_net *nn) |
4c352362 | 2129 | { |
1cd0cfc4 | 2130 | unsigned int r; |
4c352362 | 2131 | |
ce449ba7 | 2132 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 | 2133 | netif_carrier_off(nn->netdev); |
4c352362 JK |
2134 | nn->link_up = false; |
2135 | ||
aba52df8 JK |
2136 | for (r = 0; r < nn->num_r_vecs; r++) { |
2137 | disable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
4c352362 | 2138 | napi_disable(&nn->r_vecs[r].napi); |
aba52df8 | 2139 | } |
4c352362 | 2140 | |
1cd0cfc4 JK |
2141 | netif_tx_disable(nn->netdev); |
2142 | } | |
4c352362 | 2143 | |
1cd0cfc4 JK |
2144 | /** |
2145 | * nfp_net_close_free_all() - Free all runtime resources | |
2146 | * @nn: NFP Net device to reconfigure | |
2147 | */ | |
2148 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2149 | { | |
2150 | unsigned int r; | |
4c352362 | 2151 | |
4c352362 | 2152 | for (r = 0; r < nn->num_r_vecs; r++) { |
1934680f | 2153 | nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring); |
0afbfb18 JK |
2154 | nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); |
2155 | nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); | |
2156 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
4c352362 JK |
2157 | } |
2158 | ||
73725d9d JK |
2159 | kfree(nn->rx_rings); |
2160 | kfree(nn->tx_rings); | |
2161 | ||
0ba40af9 | 2162 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 | 2163 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); |
1cd0cfc4 JK |
2164 | } |
2165 | ||
2166 | /** | |
2167 | * nfp_net_netdev_close() - Called when the device is downed | |
2168 | * @netdev: netdev structure | |
2169 | */ | |
2170 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2171 | { | |
2172 | struct nfp_net *nn = netdev_priv(netdev); | |
2173 | ||
2174 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { | |
2175 | nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); | |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective | |
2180 | */ | |
2181 | nfp_net_close_stack(nn); | |
2182 | ||
2183 | /* Step 2: Tell NFP | |
2184 | */ | |
2185 | nfp_net_clear_config_and_disable(nn); | |
2186 | ||
2187 | /* Step 3: Free resources | |
2188 | */ | |
2189 | nfp_net_close_free_all(nn); | |
4c352362 JK |
2190 | |
2191 | nn_dbg(nn, "%s down", netdev->name); | |
2192 | return 0; | |
2193 | } | |
2194 | ||
2195 | static void nfp_net_set_rx_mode(struct net_device *netdev) | |
2196 | { | |
2197 | struct nfp_net *nn = netdev_priv(netdev); | |
2198 | u32 new_ctrl; | |
2199 | ||
2200 | new_ctrl = nn->ctrl; | |
2201 | ||
2202 | if (netdev->flags & IFF_PROMISC) { | |
2203 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
2204 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
2205 | else | |
2206 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
2207 | } else { | |
2208 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
2209 | } | |
2210 | ||
2211 | if (new_ctrl == nn->ctrl) | |
2212 | return; | |
2213 | ||
2214 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 2215 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 JK |
2216 | |
2217 | nn->ctrl = new_ctrl; | |
2218 | } | |
2219 | ||
2220 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
2221 | { | |
36a857e4 | 2222 | unsigned int old_mtu, old_fl_bufsz, new_fl_bufsz; |
4c352362 | 2223 | struct nfp_net *nn = netdev_priv(netdev); |
36a857e4 JK |
2224 | struct nfp_net_rx_ring *tmp_rings; |
2225 | int err; | |
4c352362 JK |
2226 | |
2227 | if (new_mtu < 68 || new_mtu > nn->max_mtu) { | |
2228 | nn_err(nn, "New MTU (%d) is not valid\n", new_mtu); | |
2229 | return -EINVAL; | |
2230 | } | |
2231 | ||
36a857e4 JK |
2232 | old_mtu = netdev->mtu; |
2233 | old_fl_bufsz = nn->fl_bufsz; | |
2234 | new_fl_bufsz = NFP_NET_MAX_PREPEND + ETH_HLEN + VLAN_HLEN * 2 + new_mtu; | |
2235 | ||
2236 | if (!netif_running(netdev)) { | |
2237 | netdev->mtu = new_mtu; | |
2238 | nn->fl_bufsz = new_fl_bufsz; | |
2239 | return 0; | |
2240 | } | |
2241 | ||
2242 | /* Prepare new rings */ | |
a98cb258 JK |
2243 | tmp_rings = nfp_net_shadow_rx_rings_prepare(nn, new_fl_bufsz, |
2244 | nn->rxd_cnt); | |
36a857e4 JK |
2245 | if (!tmp_rings) |
2246 | return -ENOMEM; | |
2247 | ||
2248 | /* Stop device, swap in new rings, try to start the firmware */ | |
2249 | nfp_net_close_stack(nn); | |
2250 | nfp_net_clear_config_and_disable(nn); | |
2251 | ||
2252 | tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings); | |
2253 | ||
4c352362 | 2254 | netdev->mtu = new_mtu; |
36a857e4 JK |
2255 | nn->fl_bufsz = new_fl_bufsz; |
2256 | ||
2257 | err = nfp_net_set_config_and_enable(nn); | |
2258 | if (err) { | |
2259 | const int err_new = err; | |
2260 | ||
2261 | /* Try with old configuration and old rings */ | |
2262 | tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings); | |
2263 | ||
2264 | netdev->mtu = old_mtu; | |
2265 | nn->fl_bufsz = old_fl_bufsz; | |
4c352362 | 2266 | |
36a857e4 JK |
2267 | err = __nfp_net_set_config_and_enable(nn); |
2268 | if (err) | |
2269 | nn_err(nn, "Can't restore MTU - FW communication failed (%d,%d)\n", | |
2270 | err_new, err); | |
4c352362 JK |
2271 | } |
2272 | ||
36a857e4 JK |
2273 | nfp_net_shadow_rx_rings_free(nn, tmp_rings); |
2274 | ||
2275 | nfp_net_open_stack(nn); | |
2276 | ||
2277 | return err; | |
4c352362 JK |
2278 | } |
2279 | ||
cc7c0333 JK |
2280 | int nfp_net_set_ring_size(struct nfp_net *nn, u32 rxd_cnt, u32 txd_cnt) |
2281 | { | |
2282 | struct nfp_net_tx_ring *tx_rings = NULL; | |
2283 | struct nfp_net_rx_ring *rx_rings = NULL; | |
2284 | u32 old_rxd_cnt, old_txd_cnt; | |
2285 | int err; | |
2286 | ||
2287 | if (!netif_running(nn->netdev)) { | |
2288 | nn->rxd_cnt = rxd_cnt; | |
2289 | nn->txd_cnt = txd_cnt; | |
2290 | return 0; | |
2291 | } | |
2292 | ||
2293 | old_rxd_cnt = nn->rxd_cnt; | |
2294 | old_txd_cnt = nn->txd_cnt; | |
2295 | ||
2296 | /* Prepare new rings */ | |
2297 | if (nn->rxd_cnt != rxd_cnt) { | |
2298 | rx_rings = nfp_net_shadow_rx_rings_prepare(nn, nn->fl_bufsz, | |
2299 | rxd_cnt); | |
2300 | if (!rx_rings) | |
2301 | return -ENOMEM; | |
2302 | } | |
2303 | if (nn->txd_cnt != txd_cnt) { | |
2304 | tx_rings = nfp_net_shadow_tx_rings_prepare(nn, txd_cnt); | |
2305 | if (!tx_rings) { | |
2306 | nfp_net_shadow_rx_rings_free(nn, rx_rings); | |
2307 | return -ENOMEM; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | /* Stop device, swap in new rings, try to start the firmware */ | |
2312 | nfp_net_close_stack(nn); | |
2313 | nfp_net_clear_config_and_disable(nn); | |
2314 | ||
2315 | if (rx_rings) | |
2316 | rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings); | |
2317 | if (tx_rings) | |
2318 | tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings); | |
2319 | ||
2320 | nn->rxd_cnt = rxd_cnt; | |
2321 | nn->txd_cnt = txd_cnt; | |
2322 | ||
2323 | err = nfp_net_set_config_and_enable(nn); | |
2324 | if (err) { | |
2325 | const int err_new = err; | |
2326 | ||
2327 | /* Try with old configuration and old rings */ | |
2328 | if (rx_rings) | |
2329 | rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings); | |
2330 | if (tx_rings) | |
2331 | tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings); | |
2332 | ||
2333 | nn->rxd_cnt = old_rxd_cnt; | |
2334 | nn->txd_cnt = old_txd_cnt; | |
2335 | ||
2336 | err = __nfp_net_set_config_and_enable(nn); | |
2337 | if (err) | |
2338 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", | |
2339 | err_new, err); | |
2340 | } | |
2341 | ||
2342 | nfp_net_shadow_rx_rings_free(nn, rx_rings); | |
2343 | nfp_net_shadow_tx_rings_free(nn, tx_rings); | |
2344 | ||
2345 | nfp_net_open_stack(nn); | |
2346 | ||
2347 | return err; | |
2348 | } | |
2349 | ||
4c352362 JK |
2350 | static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, |
2351 | struct rtnl_link_stats64 *stats) | |
2352 | { | |
2353 | struct nfp_net *nn = netdev_priv(netdev); | |
2354 | int r; | |
2355 | ||
2356 | for (r = 0; r < nn->num_r_vecs; r++) { | |
2357 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; | |
2358 | u64 data[3]; | |
2359 | unsigned int start; | |
2360 | ||
2361 | do { | |
2362 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
2363 | data[0] = r_vec->rx_pkts; | |
2364 | data[1] = r_vec->rx_bytes; | |
2365 | data[2] = r_vec->rx_drops; | |
2366 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
2367 | stats->rx_packets += data[0]; | |
2368 | stats->rx_bytes += data[1]; | |
2369 | stats->rx_dropped += data[2]; | |
2370 | ||
2371 | do { | |
2372 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
2373 | data[0] = r_vec->tx_pkts; | |
2374 | data[1] = r_vec->tx_bytes; | |
2375 | data[2] = r_vec->tx_errors; | |
2376 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
2377 | stats->tx_packets += data[0]; | |
2378 | stats->tx_bytes += data[1]; | |
2379 | stats->tx_errors += data[2]; | |
2380 | } | |
2381 | ||
2382 | return stats; | |
2383 | } | |
2384 | ||
2385 | static int nfp_net_set_features(struct net_device *netdev, | |
2386 | netdev_features_t features) | |
2387 | { | |
2388 | netdev_features_t changed = netdev->features ^ features; | |
2389 | struct nfp_net *nn = netdev_priv(netdev); | |
2390 | u32 new_ctrl; | |
2391 | int err; | |
2392 | ||
2393 | /* Assume this is not called with features we have not advertised */ | |
2394 | ||
2395 | new_ctrl = nn->ctrl; | |
2396 | ||
2397 | if (changed & NETIF_F_RXCSUM) { | |
2398 | if (features & NETIF_F_RXCSUM) | |
2399 | new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2400 | else | |
2401 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; | |
2402 | } | |
2403 | ||
2404 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
2405 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
2406 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2407 | else | |
2408 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
2409 | } | |
2410 | ||
2411 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
2412 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
2413 | new_ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2414 | else | |
2415 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; | |
2416 | } | |
2417 | ||
2418 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
2419 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
2420 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2421 | else | |
2422 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
2423 | } | |
2424 | ||
2425 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
2426 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
2427 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2428 | else | |
2429 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
2430 | } | |
2431 | ||
2432 | if (changed & NETIF_F_SG) { | |
2433 | if (features & NETIF_F_SG) | |
2434 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2435 | else | |
2436 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
2437 | } | |
2438 | ||
2439 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", | |
2440 | netdev->features, features, changed); | |
2441 | ||
2442 | if (new_ctrl == nn->ctrl) | |
2443 | return 0; | |
2444 | ||
2445 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); | |
2446 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2447 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
2448 | if (err) | |
2449 | return err; | |
2450 | ||
2451 | nn->ctrl = new_ctrl; | |
2452 | ||
2453 | return 0; | |
2454 | } | |
2455 | ||
2456 | static netdev_features_t | |
2457 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
2458 | netdev_features_t features) | |
2459 | { | |
2460 | u8 l4_hdr; | |
2461 | ||
2462 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
2463 | features &= vlan_features_check(skb, features); | |
2464 | ||
2465 | if (!skb->encapsulation) | |
2466 | return features; | |
2467 | ||
2468 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
2469 | if (skb_is_gso(skb)) { | |
2470 | u32 hdrlen; | |
2471 | ||
2472 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
2473 | inner_tcp_hdrlen(skb); | |
2474 | ||
2475 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) | |
2476 | features &= ~NETIF_F_GSO_MASK; | |
2477 | } | |
2478 | ||
2479 | /* VXLAN/GRE check */ | |
2480 | switch (vlan_get_protocol(skb)) { | |
2481 | case htons(ETH_P_IP): | |
2482 | l4_hdr = ip_hdr(skb)->protocol; | |
2483 | break; | |
2484 | case htons(ETH_P_IPV6): | |
2485 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
2486 | break; | |
2487 | default: | |
a188222b | 2488 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2489 | } |
2490 | ||
2491 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
2492 | skb->inner_protocol != htons(ETH_P_TEB) || | |
2493 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
2494 | (l4_hdr == IPPROTO_UDP && | |
2495 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
2496 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 2497 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2498 | |
2499 | return features; | |
2500 | } | |
2501 | ||
2502 | /** | |
2503 | * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW | |
2504 | * @nn: NFP Net device to reconfigure | |
2505 | * @idx: Index into the port table where new port should be written | |
2506 | * @port: UDP port to configure (pass zero to remove VXLAN port) | |
2507 | */ | |
2508 | static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) | |
2509 | { | |
2510 | int i; | |
2511 | ||
2512 | nn->vxlan_ports[idx] = port; | |
2513 | ||
2514 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) | |
2515 | return; | |
2516 | ||
2517 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
2518 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) | |
2519 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), | |
2520 | be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | | |
2521 | be16_to_cpu(nn->vxlan_ports[i])); | |
2522 | ||
3d780b92 | 2523 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN); |
4c352362 JK |
2524 | } |
2525 | ||
2526 | /** | |
2527 | * nfp_net_find_vxlan_idx() - find table entry of the port or a free one | |
2528 | * @nn: NFP Network structure | |
2529 | * @port: UDP port to look for | |
2530 | * | |
2531 | * Return: if the port is already in the table -- it's position; | |
2532 | * if the port is not in the table -- free position to use; | |
2533 | * if the table is full -- -ENOSPC. | |
2534 | */ | |
2535 | static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) | |
2536 | { | |
2537 | int i, free_idx = -ENOSPC; | |
2538 | ||
2539 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { | |
2540 | if (nn->vxlan_ports[i] == port) | |
2541 | return i; | |
2542 | if (!nn->vxlan_usecnt[i]) | |
2543 | free_idx = i; | |
2544 | } | |
2545 | ||
2546 | return free_idx; | |
2547 | } | |
2548 | ||
2549 | static void nfp_net_add_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2550 | struct udp_tunnel_info *ti) |
4c352362 JK |
2551 | { |
2552 | struct nfp_net *nn = netdev_priv(netdev); | |
2553 | int idx; | |
2554 | ||
3ab68837 AD |
2555 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2556 | return; | |
2557 | ||
2558 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
4c352362 JK |
2559 | if (idx == -ENOSPC) |
2560 | return; | |
2561 | ||
2562 | if (!nn->vxlan_usecnt[idx]++) | |
3ab68837 | 2563 | nfp_net_set_vxlan_port(nn, idx, ti->port); |
4c352362 JK |
2564 | } |
2565 | ||
2566 | static void nfp_net_del_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2567 | struct udp_tunnel_info *ti) |
4c352362 JK |
2568 | { |
2569 | struct nfp_net *nn = netdev_priv(netdev); | |
2570 | int idx; | |
2571 | ||
3ab68837 AD |
2572 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2573 | return; | |
2574 | ||
2575 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
f50cef6f | 2576 | if (idx == -ENOSPC || !nn->vxlan_usecnt[idx]) |
4c352362 JK |
2577 | return; |
2578 | ||
2579 | if (!--nn->vxlan_usecnt[idx]) | |
2580 | nfp_net_set_vxlan_port(nn, idx, 0); | |
2581 | } | |
2582 | ||
2583 | static const struct net_device_ops nfp_net_netdev_ops = { | |
2584 | .ndo_open = nfp_net_netdev_open, | |
2585 | .ndo_stop = nfp_net_netdev_close, | |
2586 | .ndo_start_xmit = nfp_net_tx, | |
2587 | .ndo_get_stats64 = nfp_net_stat64, | |
2588 | .ndo_tx_timeout = nfp_net_tx_timeout, | |
2589 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
2590 | .ndo_change_mtu = nfp_net_change_mtu, | |
2591 | .ndo_set_mac_address = eth_mac_addr, | |
2592 | .ndo_set_features = nfp_net_set_features, | |
2593 | .ndo_features_check = nfp_net_features_check, | |
3ab68837 AD |
2594 | .ndo_udp_tunnel_add = nfp_net_add_vxlan_port, |
2595 | .ndo_udp_tunnel_del = nfp_net_del_vxlan_port, | |
4c352362 JK |
2596 | }; |
2597 | ||
2598 | /** | |
2599 | * nfp_net_info() - Print general info about the NIC | |
2600 | * @nn: NFP Net device to reconfigure | |
2601 | */ | |
2602 | void nfp_net_info(struct nfp_net *nn) | |
2603 | { | |
2604 | nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", | |
2605 | nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx", | |
2606 | nn->is_vf ? "VF " : "", | |
2607 | nn->num_tx_rings, nn->max_tx_rings, | |
2608 | nn->num_rx_rings, nn->max_rx_rings); | |
2609 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", | |
2610 | nn->fw_ver.resv, nn->fw_ver.class, | |
2611 | nn->fw_ver.major, nn->fw_ver.minor, | |
2612 | nn->max_mtu); | |
2613 | nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", | |
2614 | nn->cap, | |
2615 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
2616 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
2617 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
2618 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
2619 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
2620 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
2621 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
2622 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
2623 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
2624 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", | |
2625 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", | |
2626 | nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", | |
2627 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", | |
2628 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
2629 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
2630 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : ""); | |
2631 | } | |
2632 | ||
2633 | /** | |
2634 | * nfp_net_netdev_alloc() - Allocate netdev and related structure | |
2635 | * @pdev: PCI device | |
2636 | * @max_tx_rings: Maximum number of TX rings supported by device | |
2637 | * @max_rx_rings: Maximum number of RX rings supported by device | |
2638 | * | |
2639 | * This function allocates a netdev device and fills in the initial | |
2640 | * part of the @struct nfp_net structure. | |
2641 | * | |
2642 | * Return: NFP Net device structure, or ERR_PTR on error. | |
2643 | */ | |
2644 | struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, | |
2645 | int max_tx_rings, int max_rx_rings) | |
2646 | { | |
2647 | struct net_device *netdev; | |
2648 | struct nfp_net *nn; | |
2649 | int nqs; | |
2650 | ||
2651 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), | |
2652 | max_tx_rings, max_rx_rings); | |
2653 | if (!netdev) | |
2654 | return ERR_PTR(-ENOMEM); | |
2655 | ||
2656 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2657 | nn = netdev_priv(netdev); | |
2658 | ||
2659 | nn->netdev = netdev; | |
2660 | nn->pdev = pdev; | |
2661 | ||
2662 | nn->max_tx_rings = max_tx_rings; | |
2663 | nn->max_rx_rings = max_rx_rings; | |
2664 | ||
2665 | nqs = netif_get_num_default_rss_queues(); | |
2666 | nn->num_tx_rings = min_t(int, nqs, max_tx_rings); | |
2667 | nn->num_rx_rings = min_t(int, nqs, max_rx_rings); | |
2668 | ||
2669 | nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; | |
2670 | nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
2671 | ||
2672 | spin_lock_init(&nn->reconfig_lock); | |
2673 | spin_lock_init(&nn->link_status_lock); | |
2674 | ||
3d780b92 JK |
2675 | setup_timer(&nn->reconfig_timer, |
2676 | nfp_net_reconfig_timer, (unsigned long)nn); | |
2677 | ||
4c352362 JK |
2678 | return nn; |
2679 | } | |
2680 | ||
2681 | /** | |
2682 | * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did | |
2683 | * @nn: NFP Net device to reconfigure | |
2684 | */ | |
2685 | void nfp_net_netdev_free(struct nfp_net *nn) | |
2686 | { | |
2687 | free_netdev(nn->netdev); | |
2688 | } | |
2689 | ||
2690 | /** | |
2691 | * nfp_net_rss_init() - Set the initial RSS parameters | |
2692 | * @nn: NFP Net device to reconfigure | |
2693 | */ | |
2694 | static void nfp_net_rss_init(struct nfp_net *nn) | |
2695 | { | |
2696 | int i; | |
2697 | ||
2698 | netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); | |
2699 | ||
2700 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
2701 | nn->rss_itbl[i] = | |
2702 | ethtool_rxfh_indir_default(i, nn->num_rx_rings); | |
2703 | ||
2704 | /* Enable IPv4/IPv6 TCP by default */ | |
2705 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
2706 | NFP_NET_CFG_RSS_IPV6_TCP | | |
2707 | NFP_NET_CFG_RSS_TOEPLITZ | | |
2708 | NFP_NET_CFG_RSS_MASK; | |
2709 | } | |
2710 | ||
2711 | /** | |
2712 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
2713 | * @nn: NFP Net device to reconfigure | |
2714 | */ | |
2715 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
2716 | { | |
2717 | nn->rx_coalesce_usecs = 50; | |
2718 | nn->rx_coalesce_max_frames = 64; | |
2719 | nn->tx_coalesce_usecs = 50; | |
2720 | nn->tx_coalesce_max_frames = 64; | |
2721 | } | |
2722 | ||
2723 | /** | |
2724 | * nfp_net_netdev_init() - Initialise/finalise the netdev structure | |
2725 | * @netdev: netdev structure | |
2726 | * | |
2727 | * Return: 0 on success or negative errno on error. | |
2728 | */ | |
2729 | int nfp_net_netdev_init(struct net_device *netdev) | |
2730 | { | |
2731 | struct nfp_net *nn = netdev_priv(netdev); | |
2732 | int err; | |
2733 | ||
2734 | /* Get some of the read-only fields from the BAR */ | |
2735 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
2736 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
2737 | ||
f642963b | 2738 | nfp_net_write_mac_addr(nn); |
4c352362 JK |
2739 | |
2740 | /* Set default MTU and Freelist buffer size */ | |
2741 | if (nn->max_mtu < NFP_NET_DEFAULT_MTU) | |
2742 | netdev->mtu = nn->max_mtu; | |
2743 | else | |
2744 | netdev->mtu = NFP_NET_DEFAULT_MTU; | |
2745 | nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ; | |
2746 | ||
2747 | /* Advertise/enable offloads based on capabilities | |
2748 | * | |
2749 | * Note: netdev->features show the currently enabled features | |
2750 | * and netdev->hw_features advertises which features are | |
2751 | * supported. By default we enable most features. | |
2752 | */ | |
2753 | netdev->hw_features = NETIF_F_HIGHDMA; | |
2754 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { | |
2755 | netdev->hw_features |= NETIF_F_RXCSUM; | |
2756 | nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2757 | } | |
2758 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
2759 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
2760 | nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2761 | } | |
2762 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
2763 | netdev->hw_features |= NETIF_F_SG; | |
2764 | nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2765 | } | |
2766 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { | |
2767 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; | |
2768 | nn->ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2769 | } | |
2770 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
2771 | netdev->hw_features |= NETIF_F_RXHASH; | |
2772 | nfp_net_rss_init(nn); | |
2773 | nn->ctrl |= NFP_NET_CFG_CTRL_RSS; | |
2774 | } | |
2775 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && | |
2776 | nn->cap & NFP_NET_CFG_CTRL_NVGRE) { | |
2777 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
2778 | netdev->hw_features |= NETIF_F_GSO_GRE | | |
2779 | NETIF_F_GSO_UDP_TUNNEL; | |
2780 | nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; | |
2781 | ||
2782 | netdev->hw_enc_features = netdev->hw_features; | |
2783 | } | |
2784 | ||
2785 | netdev->vlan_features = netdev->hw_features; | |
2786 | ||
2787 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
2788 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
2789 | nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2790 | } | |
2791 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
2792 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
2793 | nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2794 | } | |
2795 | ||
2796 | netdev->features = netdev->hw_features; | |
2797 | ||
2798 | /* Advertise but disable TSO by default. */ | |
2799 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
2800 | ||
2801 | /* Allow L2 Broadcast and Multicast through by default, if supported */ | |
2802 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
2803 | nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; | |
2804 | if (nn->cap & NFP_NET_CFG_CTRL_L2MC) | |
2805 | nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; | |
2806 | ||
2807 | /* Allow IRQ moderation, if supported */ | |
2808 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
2809 | nfp_net_irqmod_init(nn); | |
2810 | nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
2811 | } | |
2812 | ||
2813 | /* On NFP-3200 enable MSI-X auto-masking, if supported and the | |
2814 | * interrupts are not shared. | |
2815 | */ | |
2816 | if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO) | |
2817 | nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO; | |
2818 | ||
2819 | /* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */ | |
2820 | if (nn->fw_ver.major >= 2) | |
2821 | nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
2822 | else | |
2823 | nn->rx_offset = NFP_NET_RX_OFFSET; | |
2824 | ||
2825 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ | |
2826 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
2827 | ||
2828 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
2829 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
2830 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2831 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2832 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
2833 | NFP_NET_CFG_UPDATE_GEN); | |
2834 | if (err) | |
2835 | return err; | |
2836 | ||
2837 | /* Finalise the netdev setup */ | |
2838 | ether_setup(netdev); | |
2839 | netdev->netdev_ops = &nfp_net_netdev_ops; | |
2840 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
4b402d71 | 2841 | netif_carrier_off(netdev); |
4c352362 JK |
2842 | |
2843 | nfp_net_set_ethtool_ops(netdev); | |
2844 | nfp_net_irqs_assign(netdev); | |
2845 | ||
2846 | return register_netdev(netdev); | |
2847 | } | |
2848 | ||
2849 | /** | |
2850 | * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. | |
2851 | * @netdev: netdev structure | |
2852 | */ | |
2853 | void nfp_net_netdev_clean(struct net_device *netdev) | |
2854 | { | |
2855 | unregister_netdev(netdev); | |
2856 | } |