Commit | Line | Data |
---|---|---|
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 | ||
7533fdc0 | 63 | #include <net/pkt_cls.h> |
4c352362 JK |
64 | #include <net/vxlan.h> |
65 | ||
66 | #include "nfp_net_ctrl.h" | |
67 | #include "nfp_net.h" | |
68 | ||
69 | /** | |
70 | * nfp_net_get_fw_version() - Read and parse the FW version | |
71 | * @fw_ver: Output fw_version structure to read to | |
72 | * @ctrl_bar: Mapped address of the control BAR | |
73 | */ | |
74 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
75 | void __iomem *ctrl_bar) | |
76 | { | |
77 | u32 reg; | |
78 | ||
79 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
80 | put_unaligned_le32(reg, fw_ver); | |
81 | } | |
82 | ||
3d780b92 JK |
83 | /* Firmware reconfig |
84 | * | |
85 | * Firmware reconfig may take a while so we have two versions of it - | |
86 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
87 | * RTNL so we don't have to worry about serializing them. | |
88 | */ | |
89 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
90 | { | |
91 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
92 | /* ensure update is written before pinging HW */ | |
93 | nn_pci_flush(nn); | |
94 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
95 | } | |
96 | ||
97 | /* Pass 0 as update to run posted reconfigs. */ | |
98 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
99 | { | |
100 | update |= nn->reconfig_posted; | |
101 | nn->reconfig_posted = 0; | |
102 | ||
103 | nfp_net_reconfig_start(nn, update); | |
104 | ||
105 | nn->reconfig_timer_active = true; | |
106 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
107 | } | |
108 | ||
109 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
110 | { | |
111 | u32 reg; | |
112 | ||
113 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
114 | if (reg == 0) | |
115 | return true; | |
116 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
117 | nn_err(nn, "Reconfig error: 0x%08x\n", reg); | |
118 | return true; | |
119 | } else if (last_check) { | |
120 | nn_err(nn, "Reconfig timeout: 0x%08x\n", reg); | |
121 | return true; | |
122 | } | |
123 | ||
124 | return false; | |
125 | } | |
126 | ||
127 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
128 | { | |
129 | bool timed_out = false; | |
130 | ||
131 | /* Poll update field, waiting for NFP to ack the config */ | |
132 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { | |
133 | msleep(1); | |
134 | timed_out = time_is_before_eq_jiffies(deadline); | |
135 | } | |
136 | ||
137 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) | |
138 | return -EIO; | |
139 | ||
140 | return timed_out ? -EIO : 0; | |
141 | } | |
142 | ||
143 | static void nfp_net_reconfig_timer(unsigned long data) | |
144 | { | |
145 | struct nfp_net *nn = (void *)data; | |
146 | ||
147 | spin_lock_bh(&nn->reconfig_lock); | |
148 | ||
149 | nn->reconfig_timer_active = false; | |
150 | ||
151 | /* If sync caller is present it will take over from us */ | |
152 | if (nn->reconfig_sync_present) | |
153 | goto done; | |
154 | ||
155 | /* Read reconfig status and report errors */ | |
156 | nfp_net_reconfig_check_done(nn, true); | |
157 | ||
158 | if (nn->reconfig_posted) | |
159 | nfp_net_reconfig_start_async(nn, 0); | |
160 | done: | |
161 | spin_unlock_bh(&nn->reconfig_lock); | |
162 | } | |
163 | ||
164 | /** | |
165 | * nfp_net_reconfig_post() - Post async reconfig request | |
166 | * @nn: NFP Net device to reconfigure | |
167 | * @update: The value for the update field in the BAR config | |
168 | * | |
169 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
170 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
171 | * merged together! | |
172 | */ | |
173 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
174 | { | |
175 | spin_lock_bh(&nn->reconfig_lock); | |
176 | ||
177 | /* Sync caller will kick off async reconf when it's done, just post */ | |
178 | if (nn->reconfig_sync_present) { | |
179 | nn->reconfig_posted |= update; | |
180 | goto done; | |
181 | } | |
182 | ||
183 | /* Opportunistically check if the previous command is done */ | |
184 | if (!nn->reconfig_timer_active || | |
185 | nfp_net_reconfig_check_done(nn, false)) | |
186 | nfp_net_reconfig_start_async(nn, update); | |
187 | else | |
188 | nn->reconfig_posted |= update; | |
189 | done: | |
190 | spin_unlock_bh(&nn->reconfig_lock); | |
191 | } | |
192 | ||
4c352362 JK |
193 | /** |
194 | * nfp_net_reconfig() - Reconfigure the firmware | |
195 | * @nn: NFP Net device to reconfigure | |
196 | * @update: The value for the update field in the BAR config | |
197 | * | |
198 | * Write the update word to the BAR and ping the reconfig queue. The | |
199 | * poll until the firmware has acknowledged the update by zeroing the | |
200 | * update word. | |
201 | * | |
202 | * Return: Negative errno on error, 0 on success | |
203 | */ | |
204 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) | |
205 | { | |
3d780b92 JK |
206 | bool cancelled_timer = false; |
207 | u32 pre_posted_requests; | |
208 | int ret; | |
4c352362 JK |
209 | |
210 | spin_lock_bh(&nn->reconfig_lock); | |
211 | ||
3d780b92 | 212 | nn->reconfig_sync_present = true; |
4c352362 | 213 | |
3d780b92 JK |
214 | if (nn->reconfig_timer_active) { |
215 | del_timer(&nn->reconfig_timer); | |
216 | nn->reconfig_timer_active = false; | |
217 | cancelled_timer = true; | |
218 | } | |
219 | pre_posted_requests = nn->reconfig_posted; | |
220 | nn->reconfig_posted = 0; | |
221 | ||
222 | spin_unlock_bh(&nn->reconfig_lock); | |
223 | ||
224 | if (cancelled_timer) | |
225 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); | |
226 | ||
227 | /* Run the posted reconfigs which were issued before we started */ | |
228 | if (pre_posted_requests) { | |
229 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
230 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 JK |
231 | } |
232 | ||
3d780b92 JK |
233 | nfp_net_reconfig_start(nn, update); |
234 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
235 | ||
236 | spin_lock_bh(&nn->reconfig_lock); | |
237 | ||
238 | if (nn->reconfig_posted) | |
239 | nfp_net_reconfig_start_async(nn, 0); | |
240 | ||
241 | nn->reconfig_sync_present = false; | |
242 | ||
4c352362 | 243 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 244 | |
4c352362 JK |
245 | return ret; |
246 | } | |
247 | ||
248 | /* Interrupt configuration and handling | |
249 | */ | |
250 | ||
4c352362 JK |
251 | /** |
252 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
253 | * @nn: NFP Network structure | |
254 | * @entry_nr: MSI-X table entry | |
255 | * | |
416db5c1 | 256 | * Clear the ICR for the IRQ entry. |
4c352362 JK |
257 | */ |
258 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
259 | { | |
4c352362 JK |
260 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); |
261 | nn_pci_flush(nn); | |
262 | } | |
263 | ||
264 | /** | |
265 | * nfp_net_msix_alloc() - Try to allocate MSI-X irqs | |
266 | * @nn: NFP Network structure | |
267 | * @nr_vecs: Number of MSI-X vectors to allocate | |
268 | * | |
269 | * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. | |
270 | * | |
271 | * Return: Number of MSI-X vectors obtained or 0 on error. | |
272 | */ | |
273 | static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) | |
274 | { | |
275 | struct pci_dev *pdev = nn->pdev; | |
276 | int nvecs; | |
277 | int i; | |
278 | ||
279 | for (i = 0; i < nr_vecs; i++) | |
280 | nn->irq_entries[i].entry = i; | |
281 | ||
282 | nvecs = pci_enable_msix_range(pdev, nn->irq_entries, | |
283 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs); | |
284 | if (nvecs < 0) { | |
285 | nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", | |
286 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); | |
287 | return 0; | |
288 | } | |
289 | ||
290 | return nvecs; | |
291 | } | |
292 | ||
293 | /** | |
294 | * nfp_net_irqs_wanted() - Work out how many interrupt vectors we want | |
295 | * @nn: NFP Network structure | |
296 | * | |
297 | * We want a vector per CPU (or ring), whatever is smaller plus | |
298 | * NFP_NET_NON_Q_VECTORS for LSC etc. | |
299 | * | |
300 | * Return: Number of interrupts wanted | |
301 | */ | |
302 | static int nfp_net_irqs_wanted(struct nfp_net *nn) | |
303 | { | |
304 | int ncpus; | |
305 | int vecs; | |
306 | ||
307 | ncpus = num_online_cpus(); | |
308 | ||
309 | vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings); | |
310 | vecs = min_t(int, vecs, ncpus); | |
311 | ||
312 | return vecs + NFP_NET_NON_Q_VECTORS; | |
313 | } | |
314 | ||
315 | /** | |
316 | * nfp_net_irqs_alloc() - allocates MSI-X irqs | |
317 | * @nn: NFP Network structure | |
318 | * | |
319 | * Return: Number of irqs obtained or 0 on error. | |
320 | */ | |
321 | int nfp_net_irqs_alloc(struct nfp_net *nn) | |
322 | { | |
323 | int wanted_irqs; | |
324 | ||
325 | wanted_irqs = nfp_net_irqs_wanted(nn); | |
326 | ||
327 | nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs); | |
328 | if (nn->num_irqs == 0) { | |
329 | nn_err(nn, "Failed to allocate MSI-X IRQs\n"); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS; | |
334 | ||
335 | if (nn->num_irqs < wanted_irqs) | |
336 | nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", | |
337 | wanted_irqs, nn->num_irqs); | |
338 | ||
339 | return nn->num_irqs; | |
340 | } | |
341 | ||
342 | /** | |
343 | * nfp_net_irqs_disable() - Disable interrupts | |
344 | * @nn: NFP Network structure | |
345 | * | |
346 | * Undoes what @nfp_net_irqs_alloc() does. | |
347 | */ | |
348 | void nfp_net_irqs_disable(struct nfp_net *nn) | |
349 | { | |
350 | pci_disable_msix(nn->pdev); | |
351 | } | |
352 | ||
353 | /** | |
354 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
355 | * @irq: Interrupt | |
356 | * @data: Opaque data structure | |
357 | * | |
358 | * Return: Indicate if the interrupt has been handled. | |
359 | */ | |
360 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
361 | { | |
362 | struct nfp_net_r_vector *r_vec = data; | |
363 | ||
364 | napi_schedule_irqoff(&r_vec->napi); | |
365 | ||
366 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
367 | * the MSI-X table or via the per entry ICR field. So there | |
368 | * is no need to disable interrupts here. | |
369 | */ | |
370 | return IRQ_HANDLED; | |
371 | } | |
372 | ||
373 | /** | |
374 | * nfp_net_read_link_status() - Reread link status from control BAR | |
375 | * @nn: NFP Network structure | |
376 | */ | |
377 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
378 | { | |
379 | unsigned long flags; | |
380 | bool link_up; | |
381 | u32 sts; | |
382 | ||
383 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
384 | ||
385 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
386 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
387 | ||
388 | if (nn->link_up == link_up) | |
389 | goto out; | |
390 | ||
391 | nn->link_up = link_up; | |
392 | ||
393 | if (nn->link_up) { | |
394 | netif_carrier_on(nn->netdev); | |
395 | netdev_info(nn->netdev, "NIC Link is Up\n"); | |
396 | } else { | |
397 | netif_carrier_off(nn->netdev); | |
398 | netdev_info(nn->netdev, "NIC Link is Down\n"); | |
399 | } | |
400 | out: | |
401 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
402 | } | |
403 | ||
404 | /** | |
405 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
406 | * @irq: Interrupt | |
407 | * @data: Opaque data structure | |
408 | * | |
409 | * Return: Indicate if the interrupt has been handled. | |
410 | */ | |
411 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
412 | { | |
413 | struct nfp_net *nn = data; | |
414 | ||
415 | nfp_net_read_link_status(nn); | |
416 | ||
417 | nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); | |
418 | ||
419 | return IRQ_HANDLED; | |
420 | } | |
421 | ||
422 | /** | |
423 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
424 | * @irq: Interrupt | |
425 | * @data: Opaque data structure | |
426 | * | |
427 | * Return: Indicate if the interrupt has been handled. | |
428 | */ | |
429 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
430 | { | |
431 | struct nfp_net *nn = data; | |
432 | ||
433 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
434 | /* XXX TO BE IMPLEMENTED */ | |
435 | return IRQ_HANDLED; | |
436 | } | |
437 | ||
438 | /** | |
439 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
440 | * @tx_ring: TX ring structure | |
d79737c2 JK |
441 | * @r_vec: IRQ vector servicing this ring |
442 | * @idx: Ring index | |
4c352362 | 443 | */ |
d79737c2 JK |
444 | static void |
445 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
446 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 447 | { |
4c352362 JK |
448 | struct nfp_net *nn = r_vec->nfp_net; |
449 | ||
d79737c2 JK |
450 | tx_ring->idx = idx; |
451 | tx_ring->r_vec = r_vec; | |
452 | ||
4c352362 JK |
453 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
454 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
455 | } | |
456 | ||
457 | /** | |
458 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
459 | * @rx_ring: RX ring structure | |
d79737c2 JK |
460 | * @r_vec: IRQ vector servicing this ring |
461 | * @idx: Ring index | |
4c352362 | 462 | */ |
d79737c2 JK |
463 | static void |
464 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
465 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 466 | { |
4c352362 JK |
467 | struct nfp_net *nn = r_vec->nfp_net; |
468 | ||
d79737c2 JK |
469 | rx_ring->idx = idx; |
470 | rx_ring->r_vec = r_vec; | |
471 | ||
4c352362 JK |
472 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
473 | rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); | |
474 | ||
475 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); | |
476 | rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); | |
477 | } | |
478 | ||
479 | /** | |
480 | * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. | |
481 | * @netdev: netdev structure | |
482 | */ | |
483 | static void nfp_net_irqs_assign(struct net_device *netdev) | |
484 | { | |
485 | struct nfp_net *nn = netdev_priv(netdev); | |
486 | struct nfp_net_r_vector *r_vec; | |
487 | int r; | |
488 | ||
489 | /* Assumes nn->num_tx_rings == nn->num_rx_rings */ | |
490 | if (nn->num_tx_rings > nn->num_r_vecs) { | |
491 | nn_warn(nn, "More rings (%d) than vectors (%d).\n", | |
492 | nn->num_tx_rings, nn->num_r_vecs); | |
493 | nn->num_tx_rings = nn->num_r_vecs; | |
494 | nn->num_rx_rings = nn->num_r_vecs; | |
495 | } | |
496 | ||
497 | nn->lsc_handler = nfp_net_irq_lsc; | |
498 | nn->exn_handler = nfp_net_irq_exn; | |
499 | ||
500 | for (r = 0; r < nn->num_r_vecs; r++) { | |
501 | r_vec = &nn->r_vecs[r]; | |
502 | r_vec->nfp_net = nn; | |
503 | r_vec->handler = nfp_net_irq_rxtx; | |
504 | r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; | |
505 | ||
506 | cpumask_set_cpu(r, &r_vec->affinity_mask); | |
4c352362 JK |
507 | } |
508 | } | |
509 | ||
510 | /** | |
511 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
512 | * @nn: NFP Network structure | |
513 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
514 | * @format: printf-style format to construct the interrupt name | |
515 | * @name: Pointer to allocated space for interrupt name | |
516 | * @name_sz: Size of space for interrupt name | |
517 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
518 | * @handler: IRQ handler to register for this interrupt | |
519 | */ | |
520 | static int | |
521 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
522 | const char *format, char *name, size_t name_sz, | |
523 | unsigned int vector_idx, irq_handler_t handler) | |
524 | { | |
525 | struct msix_entry *entry; | |
526 | int err; | |
527 | ||
528 | entry = &nn->irq_entries[vector_idx]; | |
529 | ||
530 | snprintf(name, name_sz, format, netdev_name(nn->netdev)); | |
531 | err = request_irq(entry->vector, handler, 0, name, nn); | |
532 | if (err) { | |
533 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
534 | entry->vector, err); | |
535 | return err; | |
536 | } | |
537 | nn_writeb(nn, ctrl_offset, vector_idx); | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | /** | |
543 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
544 | * @nn: NFP Network structure | |
545 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
546 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
547 | */ | |
548 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
549 | unsigned int vector_idx) | |
550 | { | |
551 | nn_writeb(nn, ctrl_offset, 0xff); | |
552 | free_irq(nn->irq_entries[vector_idx].vector, nn); | |
553 | } | |
554 | ||
555 | /* Transmit | |
556 | * | |
557 | * One queue controller peripheral queue is used for transmit. The | |
558 | * driver en-queues packets for transmit by advancing the write | |
559 | * pointer. The device indicates that packets have transmitted by | |
560 | * advancing the read pointer. The driver maintains a local copy of | |
561 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
562 | * keeps @wr_p in sync with the queue controller write pointer and can | |
563 | * determine how many packets have been transmitted by comparing its | |
564 | * copy of the read pointer @rd_p with the read pointer maintained by | |
565 | * the queue controller peripheral. | |
566 | */ | |
567 | ||
568 | /** | |
569 | * nfp_net_tx_full() - Check if the TX ring is full | |
570 | * @tx_ring: TX ring to check | |
571 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
572 | * | |
573 | * This function checks, based on the *host copy* of read/write | |
574 | * pointer if a given TX ring is full. The real TX queue may have | |
575 | * some newly made available slots. | |
576 | * | |
577 | * Return: True if the ring is full. | |
578 | */ | |
fa95f1d2 | 579 | static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) |
4c352362 JK |
580 | { |
581 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
582 | } | |
583 | ||
584 | /* Wrappers for deciding when to stop and restart TX queues */ | |
585 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
586 | { | |
587 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
588 | } | |
589 | ||
590 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
591 | { | |
592 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
593 | } | |
594 | ||
595 | /** | |
596 | * nfp_net_tx_ring_stop() - stop tx ring | |
597 | * @nd_q: netdev queue | |
598 | * @tx_ring: driver tx queue structure | |
599 | * | |
600 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
601 | * someone else may be cleaning the TX ring completions so we need to be | |
602 | * extra careful here. | |
603 | */ | |
604 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
605 | struct nfp_net_tx_ring *tx_ring) | |
606 | { | |
607 | netif_tx_stop_queue(nd_q); | |
608 | ||
609 | /* We can race with the TX completion out of NAPI so recheck */ | |
610 | smp_mb(); | |
611 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
612 | netif_tx_start_queue(nd_q); | |
613 | } | |
614 | ||
615 | /** | |
616 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
617 | * @nn: NFP Net device | |
618 | * @r_vec: per-ring structure | |
619 | * @txbuf: Pointer to driver soft TX descriptor | |
620 | * @txd: Pointer to HW TX descriptor | |
621 | * @skb: Pointer to SKB | |
622 | * | |
623 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
624 | * Return error on packet header greater than maximum supported LSO header size. | |
625 | */ | |
626 | static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
627 | struct nfp_net_tx_buf *txbuf, | |
628 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
629 | { | |
630 | u32 hdrlen; | |
631 | u16 mss; | |
632 | ||
633 | if (!skb_is_gso(skb)) | |
634 | return; | |
635 | ||
636 | if (!skb->encapsulation) | |
637 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
638 | else | |
639 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
640 | inner_tcp_hdrlen(skb); | |
641 | ||
642 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
643 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
644 | ||
645 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
646 | txd->l4_offset = hdrlen; | |
647 | txd->mss = cpu_to_le16(mss); | |
648 | txd->flags |= PCIE_DESC_TX_LSO; | |
649 | ||
650 | u64_stats_update_begin(&r_vec->tx_sync); | |
651 | r_vec->tx_lso++; | |
652 | u64_stats_update_end(&r_vec->tx_sync); | |
653 | } | |
654 | ||
655 | /** | |
656 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
657 | * @nn: NFP Net device | |
658 | * @r_vec: per-ring structure | |
659 | * @txbuf: Pointer to driver soft TX descriptor | |
660 | * @txd: Pointer to TX descriptor | |
661 | * @skb: Pointer to SKB | |
662 | * | |
663 | * This function sets the TX checksum flags in the TX descriptor based | |
664 | * on the configuration and the protocol of the packet to be transmitted. | |
665 | */ | |
666 | static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
667 | struct nfp_net_tx_buf *txbuf, | |
668 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
669 | { | |
670 | struct ipv6hdr *ipv6h; | |
671 | struct iphdr *iph; | |
672 | u8 l4_hdr; | |
673 | ||
674 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) | |
675 | return; | |
676 | ||
677 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
678 | return; | |
679 | ||
680 | txd->flags |= PCIE_DESC_TX_CSUM; | |
681 | if (skb->encapsulation) | |
682 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
683 | ||
684 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
685 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
686 | ||
687 | if (iph->version == 4) { | |
688 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
689 | l4_hdr = iph->protocol; | |
690 | } else if (ipv6h->version == 6) { | |
691 | l4_hdr = ipv6h->nexthdr; | |
692 | } else { | |
693 | nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", | |
694 | iph->version); | |
695 | return; | |
696 | } | |
697 | ||
698 | switch (l4_hdr) { | |
699 | case IPPROTO_TCP: | |
700 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
701 | break; | |
702 | case IPPROTO_UDP: | |
703 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
704 | break; | |
705 | default: | |
706 | nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", | |
707 | l4_hdr); | |
708 | return; | |
709 | } | |
710 | ||
711 | u64_stats_update_begin(&r_vec->tx_sync); | |
712 | if (skb->encapsulation) | |
713 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
714 | else | |
715 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
716 | u64_stats_update_end(&r_vec->tx_sync); | |
717 | } | |
718 | ||
719 | /** | |
720 | * nfp_net_tx() - Main transmit entry point | |
721 | * @skb: SKB to transmit | |
722 | * @netdev: netdev structure | |
723 | * | |
724 | * Return: NETDEV_TX_OK on success. | |
725 | */ | |
726 | static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) | |
727 | { | |
728 | struct nfp_net *nn = netdev_priv(netdev); | |
729 | const struct skb_frag_struct *frag; | |
730 | struct nfp_net_r_vector *r_vec; | |
731 | struct nfp_net_tx_desc *txd, txdg; | |
732 | struct nfp_net_tx_buf *txbuf; | |
733 | struct nfp_net_tx_ring *tx_ring; | |
734 | struct netdev_queue *nd_q; | |
735 | dma_addr_t dma_addr; | |
736 | unsigned int fsize; | |
737 | int f, nr_frags; | |
738 | int wr_idx; | |
739 | u16 qidx; | |
740 | ||
741 | qidx = skb_get_queue_mapping(skb); | |
742 | tx_ring = &nn->tx_rings[qidx]; | |
743 | r_vec = tx_ring->r_vec; | |
744 | nd_q = netdev_get_tx_queue(nn->netdev, qidx); | |
745 | ||
746 | nr_frags = skb_shinfo(skb)->nr_frags; | |
747 | ||
748 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
749 | nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", | |
750 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
751 | netif_tx_stop_queue(nd_q); | |
752 | u64_stats_update_begin(&r_vec->tx_sync); | |
753 | r_vec->tx_busy++; | |
754 | u64_stats_update_end(&r_vec->tx_sync); | |
755 | return NETDEV_TX_BUSY; | |
756 | } | |
757 | ||
758 | /* Start with the head skbuf */ | |
759 | dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), | |
760 | DMA_TO_DEVICE); | |
761 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
762 | goto err_free; | |
763 | ||
764 | wr_idx = tx_ring->wr_p % tx_ring->cnt; | |
765 | ||
766 | /* Stash the soft descriptor of the head then initialize it */ | |
767 | txbuf = &tx_ring->txbufs[wr_idx]; | |
768 | txbuf->skb = skb; | |
769 | txbuf->dma_addr = dma_addr; | |
770 | txbuf->fidx = -1; | |
771 | txbuf->pkt_cnt = 1; | |
772 | txbuf->real_len = skb->len; | |
773 | ||
774 | /* Build TX descriptor */ | |
775 | txd = &tx_ring->txds[wr_idx]; | |
776 | txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; | |
777 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
778 | nfp_desc_set_dma_addr(txd, dma_addr); | |
779 | txd->data_len = cpu_to_le16(skb->len); | |
780 | ||
781 | txd->flags = 0; | |
782 | txd->mss = 0; | |
783 | txd->l4_offset = 0; | |
784 | ||
785 | nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); | |
786 | ||
787 | nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); | |
788 | ||
789 | if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { | |
790 | txd->flags |= PCIE_DESC_TX_VLAN; | |
791 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
792 | } | |
793 | ||
794 | /* Gather DMA */ | |
795 | if (nr_frags > 0) { | |
796 | /* all descs must match except for in addr, length and eop */ | |
797 | txdg = *txd; | |
798 | ||
799 | for (f = 0; f < nr_frags; f++) { | |
800 | frag = &skb_shinfo(skb)->frags[f]; | |
801 | fsize = skb_frag_size(frag); | |
802 | ||
803 | dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, | |
804 | fsize, DMA_TO_DEVICE); | |
805 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
806 | goto err_unmap; | |
807 | ||
808 | wr_idx = (wr_idx + 1) % tx_ring->cnt; | |
809 | tx_ring->txbufs[wr_idx].skb = skb; | |
810 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
811 | tx_ring->txbufs[wr_idx].fidx = f; | |
812 | ||
813 | txd = &tx_ring->txds[wr_idx]; | |
814 | *txd = txdg; | |
815 | txd->dma_len = cpu_to_le16(fsize); | |
816 | nfp_desc_set_dma_addr(txd, dma_addr); | |
817 | txd->offset_eop = | |
818 | (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; | |
819 | } | |
820 | ||
821 | u64_stats_update_begin(&r_vec->tx_sync); | |
822 | r_vec->tx_gather++; | |
823 | u64_stats_update_end(&r_vec->tx_sync); | |
824 | } | |
825 | ||
826 | netdev_tx_sent_queue(nd_q, txbuf->real_len); | |
827 | ||
828 | tx_ring->wr_p += nr_frags + 1; | |
829 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
830 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
831 | ||
832 | tx_ring->wr_ptr_add += nr_frags + 1; | |
833 | if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { | |
834 | /* force memory write before we let HW know */ | |
835 | wmb(); | |
836 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
837 | tx_ring->wr_ptr_add = 0; | |
838 | } | |
839 | ||
840 | skb_tx_timestamp(skb); | |
841 | ||
842 | return NETDEV_TX_OK; | |
843 | ||
844 | err_unmap: | |
845 | --f; | |
846 | while (f >= 0) { | |
847 | frag = &skb_shinfo(skb)->frags[f]; | |
848 | dma_unmap_page(&nn->pdev->dev, | |
849 | tx_ring->txbufs[wr_idx].dma_addr, | |
850 | skb_frag_size(frag), DMA_TO_DEVICE); | |
851 | tx_ring->txbufs[wr_idx].skb = NULL; | |
852 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
853 | tx_ring->txbufs[wr_idx].fidx = -2; | |
854 | wr_idx = wr_idx - 1; | |
855 | if (wr_idx < 0) | |
856 | wr_idx += tx_ring->cnt; | |
857 | } | |
858 | dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, | |
859 | skb_headlen(skb), DMA_TO_DEVICE); | |
860 | tx_ring->txbufs[wr_idx].skb = NULL; | |
861 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
862 | tx_ring->txbufs[wr_idx].fidx = -2; | |
863 | err_free: | |
864 | nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); | |
865 | u64_stats_update_begin(&r_vec->tx_sync); | |
866 | r_vec->tx_errors++; | |
867 | u64_stats_update_end(&r_vec->tx_sync); | |
868 | dev_kfree_skb_any(skb); | |
869 | return NETDEV_TX_OK; | |
870 | } | |
871 | ||
872 | /** | |
873 | * nfp_net_tx_complete() - Handled completed TX packets | |
874 | * @tx_ring: TX ring structure | |
875 | * | |
876 | * Return: Number of completed TX descriptors | |
877 | */ | |
878 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) | |
879 | { | |
880 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
881 | struct nfp_net *nn = r_vec->nfp_net; | |
882 | const struct skb_frag_struct *frag; | |
883 | struct netdev_queue *nd_q; | |
884 | u32 done_pkts = 0, done_bytes = 0; | |
885 | struct sk_buff *skb; | |
886 | int todo, nr_frags; | |
887 | u32 qcp_rd_p; | |
888 | int fidx; | |
889 | int idx; | |
890 | ||
891 | /* Work out how many descriptors have been transmitted */ | |
892 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
893 | ||
894 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
895 | return; | |
896 | ||
897 | if (qcp_rd_p > tx_ring->qcp_rd_p) | |
898 | todo = qcp_rd_p - tx_ring->qcp_rd_p; | |
899 | else | |
900 | todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; | |
901 | ||
902 | while (todo--) { | |
903 | idx = tx_ring->rd_p % tx_ring->cnt; | |
904 | tx_ring->rd_p++; | |
905 | ||
906 | skb = tx_ring->txbufs[idx].skb; | |
907 | if (!skb) | |
908 | continue; | |
909 | ||
910 | nr_frags = skb_shinfo(skb)->nr_frags; | |
911 | fidx = tx_ring->txbufs[idx].fidx; | |
912 | ||
913 | if (fidx == -1) { | |
914 | /* unmap head */ | |
915 | dma_unmap_single(&nn->pdev->dev, | |
916 | tx_ring->txbufs[idx].dma_addr, | |
917 | skb_headlen(skb), DMA_TO_DEVICE); | |
918 | ||
919 | done_pkts += tx_ring->txbufs[idx].pkt_cnt; | |
920 | done_bytes += tx_ring->txbufs[idx].real_len; | |
921 | } else { | |
922 | /* unmap fragment */ | |
923 | frag = &skb_shinfo(skb)->frags[fidx]; | |
924 | dma_unmap_page(&nn->pdev->dev, | |
925 | tx_ring->txbufs[idx].dma_addr, | |
926 | skb_frag_size(frag), DMA_TO_DEVICE); | |
927 | } | |
928 | ||
929 | /* check for last gather fragment */ | |
930 | if (fidx == nr_frags - 1) | |
931 | dev_kfree_skb_any(skb); | |
932 | ||
933 | tx_ring->txbufs[idx].dma_addr = 0; | |
934 | tx_ring->txbufs[idx].skb = NULL; | |
935 | tx_ring->txbufs[idx].fidx = -2; | |
936 | } | |
937 | ||
938 | tx_ring->qcp_rd_p = qcp_rd_p; | |
939 | ||
940 | u64_stats_update_begin(&r_vec->tx_sync); | |
941 | r_vec->tx_bytes += done_bytes; | |
942 | r_vec->tx_pkts += done_pkts; | |
943 | u64_stats_update_end(&r_vec->tx_sync); | |
944 | ||
945 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); | |
946 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); | |
947 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
948 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
949 | smp_mb(); | |
950 | ||
951 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
952 | netif_tx_wake_queue(nd_q); | |
953 | } | |
954 | ||
955 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
956 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
957 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
958 | } | |
959 | ||
960 | /** | |
827deea9 JK |
961 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
962 | * @nn: NFP Net device | |
963 | * @tx_ring: TX ring structure | |
4c352362 JK |
964 | * |
965 | * Assumes that the device is stopped | |
966 | */ | |
827deea9 JK |
967 | static void |
968 | nfp_net_tx_ring_reset(struct nfp_net *nn, struct nfp_net_tx_ring *tx_ring) | |
4c352362 | 969 | { |
4c352362 JK |
970 | const struct skb_frag_struct *frag; |
971 | struct netdev_queue *nd_q; | |
827deea9 | 972 | struct pci_dev *pdev = nn->pdev; |
4c352362 JK |
973 | |
974 | while (tx_ring->rd_p != tx_ring->wr_p) { | |
827deea9 JK |
975 | int nr_frags, fidx, idx; |
976 | struct sk_buff *skb; | |
4c352362 | 977 | |
827deea9 | 978 | idx = tx_ring->rd_p % tx_ring->cnt; |
4c352362 | 979 | skb = tx_ring->txbufs[idx].skb; |
827deea9 JK |
980 | nr_frags = skb_shinfo(skb)->nr_frags; |
981 | fidx = tx_ring->txbufs[idx].fidx; | |
982 | ||
983 | if (fidx == -1) { | |
984 | /* unmap head */ | |
985 | dma_unmap_single(&pdev->dev, | |
986 | tx_ring->txbufs[idx].dma_addr, | |
987 | skb_headlen(skb), DMA_TO_DEVICE); | |
988 | } else { | |
989 | /* unmap fragment */ | |
990 | frag = &skb_shinfo(skb)->frags[fidx]; | |
991 | dma_unmap_page(&pdev->dev, | |
992 | tx_ring->txbufs[idx].dma_addr, | |
993 | skb_frag_size(frag), DMA_TO_DEVICE); | |
4c352362 JK |
994 | } |
995 | ||
827deea9 JK |
996 | /* check for last gather fragment */ |
997 | if (fidx == nr_frags - 1) | |
998 | dev_kfree_skb_any(skb); | |
999 | ||
1000 | tx_ring->txbufs[idx].dma_addr = 0; | |
1001 | tx_ring->txbufs[idx].skb = NULL; | |
1002 | tx_ring->txbufs[idx].fidx = -2; | |
4c352362 JK |
1003 | |
1004 | tx_ring->qcp_rd_p++; | |
1005 | tx_ring->rd_p++; | |
1006 | } | |
1007 | ||
827deea9 JK |
1008 | memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt); |
1009 | tx_ring->wr_p = 0; | |
1010 | tx_ring->rd_p = 0; | |
1011 | tx_ring->qcp_rd_p = 0; | |
1012 | tx_ring->wr_ptr_add = 0; | |
1013 | ||
4c352362 JK |
1014 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); |
1015 | netdev_tx_reset_queue(nd_q); | |
1016 | } | |
1017 | ||
1018 | static void nfp_net_tx_timeout(struct net_device *netdev) | |
1019 | { | |
1020 | struct nfp_net *nn = netdev_priv(netdev); | |
1021 | int i; | |
1022 | ||
1023 | for (i = 0; i < nn->num_tx_rings; i++) { | |
1024 | if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) | |
1025 | continue; | |
1026 | nn_warn(nn, "TX timeout on ring: %d\n", i); | |
1027 | } | |
1028 | nn_warn(nn, "TX watchdog timeout\n"); | |
1029 | } | |
1030 | ||
1031 | /* Receive processing | |
1032 | */ | |
bf187ea0 JK |
1033 | static unsigned int |
1034 | nfp_net_calc_fl_bufsz(struct nfp_net *nn, unsigned int mtu) | |
1035 | { | |
1036 | unsigned int fl_bufsz; | |
1037 | ||
1038 | if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) | |
1039 | fl_bufsz = NFP_NET_MAX_PREPEND; | |
1040 | else | |
1041 | fl_bufsz = nn->rx_offset; | |
1042 | fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + mtu; | |
1043 | ||
1044 | return fl_bufsz; | |
1045 | } | |
4c352362 | 1046 | |
4c352362 JK |
1047 | /** |
1048 | * nfp_net_rx_alloc_one() - Allocate and map skb for RX | |
1049 | * @rx_ring: RX ring structure of the skb | |
1050 | * @dma_addr: Pointer to storage for DMA address (output param) | |
30d21171 | 1051 | * @fl_bufsz: size of freelist buffers |
4c352362 JK |
1052 | * |
1053 | * This function will allcate a new skb, map it for DMA. | |
1054 | * | |
1055 | * Return: allocated skb or NULL on failure. | |
1056 | */ | |
1057 | static struct sk_buff * | |
30d21171 JK |
1058 | nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr, |
1059 | unsigned int fl_bufsz) | |
4c352362 JK |
1060 | { |
1061 | struct nfp_net *nn = rx_ring->r_vec->nfp_net; | |
1062 | struct sk_buff *skb; | |
1063 | ||
30d21171 | 1064 | skb = netdev_alloc_skb(nn->netdev, fl_bufsz); |
4c352362 JK |
1065 | if (!skb) { |
1066 | nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n"); | |
1067 | return NULL; | |
1068 | } | |
1069 | ||
1070 | *dma_addr = dma_map_single(&nn->pdev->dev, skb->data, | |
30d21171 | 1071 | fl_bufsz, DMA_FROM_DEVICE); |
4c352362 JK |
1072 | if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { |
1073 | dev_kfree_skb_any(skb); | |
1074 | nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); | |
1075 | return NULL; | |
1076 | } | |
1077 | ||
1078 | return skb; | |
1079 | } | |
1080 | ||
1081 | /** | |
1082 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
1083 | * @rx_ring: RX ring structure | |
1084 | * @skb: Skb to put on rings | |
1085 | * @dma_addr: DMA address of skb mapping | |
1086 | */ | |
1087 | static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring, | |
1088 | struct sk_buff *skb, dma_addr_t dma_addr) | |
1089 | { | |
1090 | unsigned int wr_idx; | |
1091 | ||
1092 | wr_idx = rx_ring->wr_p % rx_ring->cnt; | |
1093 | ||
1094 | /* Stash SKB and DMA address away */ | |
1095 | rx_ring->rxbufs[wr_idx].skb = skb; | |
1096 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; | |
1097 | ||
1098 | /* Fill freelist descriptor */ | |
1099 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1100 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
1101 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr); | |
1102 | ||
1103 | rx_ring->wr_p++; | |
1104 | rx_ring->wr_ptr_add++; | |
1105 | if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) { | |
1106 | /* Update write pointer of the freelist queue. Make | |
1107 | * sure all writes are flushed before telling the hardware. | |
1108 | */ | |
1109 | wmb(); | |
1110 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add); | |
1111 | rx_ring->wr_ptr_add = 0; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /** | |
1934680f JK |
1116 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1117 | * @rx_ring: RX ring structure | |
4c352362 | 1118 | * |
1934680f JK |
1119 | * Warning: Do *not* call if ring buffers were never put on the FW freelist |
1120 | * (i.e. device was not enabled)! | |
4c352362 | 1121 | */ |
1934680f | 1122 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1123 | { |
1934680f | 1124 | unsigned int wr_idx, last_idx; |
4c352362 | 1125 | |
1934680f JK |
1126 | /* Move the empty entry to the end of the list */ |
1127 | wr_idx = rx_ring->wr_p % rx_ring->cnt; | |
1128 | last_idx = rx_ring->cnt - 1; | |
1129 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
1130 | rx_ring->rxbufs[wr_idx].skb = rx_ring->rxbufs[last_idx].skb; | |
1131 | rx_ring->rxbufs[last_idx].dma_addr = 0; | |
1132 | rx_ring->rxbufs[last_idx].skb = NULL; | |
4c352362 | 1133 | |
1934680f JK |
1134 | memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt); |
1135 | rx_ring->wr_p = 0; | |
1136 | rx_ring->rd_p = 0; | |
1137 | rx_ring->wr_ptr_add = 0; | |
1138 | } | |
4c352362 | 1139 | |
1934680f JK |
1140 | /** |
1141 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
1142 | * @nn: NFP Net device | |
1143 | * @rx_ring: RX ring to remove buffers from | |
1144 | * | |
1145 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1146 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1147 | * to restore required ring geometry. | |
1148 | */ | |
1149 | static void | |
1150 | nfp_net_rx_ring_bufs_free(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
1151 | { | |
1152 | struct pci_dev *pdev = nn->pdev; | |
1153 | unsigned int i; | |
4c352362 | 1154 | |
1934680f JK |
1155 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1156 | /* NULL skb can only happen when initial filling of the ring | |
1157 | * fails to allocate enough buffers and calls here to free | |
1158 | * already allocated ones. | |
1159 | */ | |
1160 | if (!rx_ring->rxbufs[i].skb) | |
1161 | continue; | |
1162 | ||
1163 | dma_unmap_single(&pdev->dev, rx_ring->rxbufs[i].dma_addr, | |
30d21171 | 1164 | rx_ring->bufsz, DMA_FROM_DEVICE); |
1934680f JK |
1165 | dev_kfree_skb_any(rx_ring->rxbufs[i].skb); |
1166 | rx_ring->rxbufs[i].dma_addr = 0; | |
1167 | rx_ring->rxbufs[i].skb = NULL; | |
4c352362 JK |
1168 | } |
1169 | } | |
1170 | ||
1171 | /** | |
1934680f JK |
1172 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
1173 | * @nn: NFP Net device | |
1174 | * @rx_ring: RX ring to remove buffers from | |
4c352362 | 1175 | */ |
1934680f JK |
1176 | static int |
1177 | nfp_net_rx_ring_bufs_alloc(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
4c352362 | 1178 | { |
1934680f JK |
1179 | struct nfp_net_rx_buf *rxbufs; |
1180 | unsigned int i; | |
1181 | ||
1182 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1183 | |
1934680f JK |
1184 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1185 | rxbufs[i].skb = | |
30d21171 JK |
1186 | nfp_net_rx_alloc_one(rx_ring, &rxbufs[i].dma_addr, |
1187 | rx_ring->bufsz); | |
1934680f JK |
1188 | if (!rxbufs[i].skb) { |
1189 | nfp_net_rx_ring_bufs_free(nn, rx_ring); | |
4c352362 JK |
1190 | return -ENOMEM; |
1191 | } | |
4c352362 JK |
1192 | } |
1193 | ||
1194 | return 0; | |
1195 | } | |
1196 | ||
1934680f JK |
1197 | /** |
1198 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
1199 | * @rx_ring: RX ring to fill | |
1200 | */ | |
1201 | static void nfp_net_rx_ring_fill_freelist(struct nfp_net_rx_ring *rx_ring) | |
1202 | { | |
1203 | unsigned int i; | |
1204 | ||
1205 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
1206 | nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[i].skb, | |
1207 | rx_ring->rxbufs[i].dma_addr); | |
1208 | } | |
1209 | ||
4c352362 JK |
1210 | /** |
1211 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1212 | * @flags: RX descriptor flags field in CPU byte order | |
1213 | */ | |
1214 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1215 | { | |
1216 | u16 csum_all_checked, csum_all_ok; | |
1217 | ||
1218 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1219 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1220 | ||
1221 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
1226 | * @nn: NFP Net device | |
1227 | * @r_vec: per-ring structure | |
1228 | * @rxd: Pointer to RX descriptor | |
1229 | * @skb: Pointer to SKB | |
1230 | */ | |
1231 | static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1232 | struct nfp_net_rx_desc *rxd, struct sk_buff *skb) | |
1233 | { | |
1234 | skb_checksum_none_assert(skb); | |
1235 | ||
1236 | if (!(nn->netdev->features & NETIF_F_RXCSUM)) | |
1237 | return; | |
1238 | ||
1239 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { | |
1240 | u64_stats_update_begin(&r_vec->rx_sync); | |
1241 | r_vec->hw_csum_rx_error++; | |
1242 | u64_stats_update_end(&r_vec->rx_sync); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1247 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1248 | * checksum as CSUM_OK. | |
1249 | */ | |
1250 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1251 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1252 | __skb_incr_checksum_unnecessary(skb); | |
1253 | u64_stats_update_begin(&r_vec->rx_sync); | |
1254 | r_vec->hw_csum_rx_ok++; | |
1255 | u64_stats_update_end(&r_vec->rx_sync); | |
1256 | } | |
1257 | ||
1258 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1259 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1260 | __skb_incr_checksum_unnecessary(skb); | |
1261 | u64_stats_update_begin(&r_vec->rx_sync); | |
1262 | r_vec->hw_csum_rx_inner_ok++; | |
1263 | u64_stats_update_end(&r_vec->rx_sync); | |
1264 | } | |
1265 | } | |
1266 | ||
4c352362 | 1267 | static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, |
19d0f54e | 1268 | unsigned int type, __be32 *hash) |
4c352362 | 1269 | { |
19d0f54e | 1270 | if (!(netdev->features & NETIF_F_RXHASH)) |
4c352362 JK |
1271 | return; |
1272 | ||
19d0f54e | 1273 | switch (type) { |
4c352362 JK |
1274 | case NFP_NET_RSS_IPV4: |
1275 | case NFP_NET_RSS_IPV6: | |
1276 | case NFP_NET_RSS_IPV6_EX: | |
19d0f54e | 1277 | skb_set_hash(skb, get_unaligned_be32(hash), PKT_HASH_TYPE_L3); |
4c352362 JK |
1278 | break; |
1279 | default: | |
19d0f54e | 1280 | skb_set_hash(skb, get_unaligned_be32(hash), PKT_HASH_TYPE_L4); |
4c352362 JK |
1281 | break; |
1282 | } | |
1283 | } | |
1284 | ||
19d0f54e JK |
1285 | static void |
1286 | nfp_net_set_hash_desc(struct net_device *netdev, struct sk_buff *skb, | |
1287 | struct nfp_net_rx_desc *rxd) | |
1288 | { | |
1289 | struct nfp_net_rx_hash *rx_hash; | |
1290 | ||
1291 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) | |
1292 | return; | |
1293 | ||
1294 | rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); | |
1295 | ||
1296 | nfp_net_set_hash(netdev, skb, get_unaligned_be32(&rx_hash->hash_type), | |
1297 | &rx_hash->hash); | |
1298 | } | |
1299 | ||
1300 | static void * | |
1301 | nfp_net_parse_meta(struct net_device *netdev, struct sk_buff *skb, | |
1302 | int meta_len) | |
1303 | { | |
1304 | u8 *data = skb->data - meta_len; | |
1305 | u32 meta_info; | |
1306 | ||
1307 | meta_info = get_unaligned_be32(data); | |
1308 | data += 4; | |
1309 | ||
1310 | while (meta_info) { | |
1311 | switch (meta_info & NFP_NET_META_FIELD_MASK) { | |
1312 | case NFP_NET_META_HASH: | |
1313 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1314 | nfp_net_set_hash(netdev, skb, | |
1315 | meta_info & NFP_NET_META_FIELD_MASK, | |
1316 | (__be32 *)data); | |
1317 | data += 4; | |
1318 | break; | |
1319 | case NFP_NET_META_MARK: | |
1320 | skb->mark = get_unaligned_be32(data); | |
1321 | data += 4; | |
1322 | break; | |
1323 | default: | |
1324 | return NULL; | |
1325 | } | |
1326 | ||
1327 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1328 | } | |
1329 | ||
1330 | return data; | |
1331 | } | |
1332 | ||
e9949aeb JK |
1333 | static void |
1334 | nfp_net_rx_drop(struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring, | |
1335 | struct nfp_net_rx_buf *rxbuf, struct sk_buff *skb) | |
1336 | { | |
1337 | u64_stats_update_begin(&r_vec->rx_sync); | |
1338 | r_vec->rx_drops++; | |
1339 | u64_stats_update_end(&r_vec->rx_sync); | |
1340 | ||
1341 | if (rxbuf) | |
1342 | nfp_net_rx_give_one(rx_ring, rxbuf->skb, rxbuf->dma_addr); | |
1343 | if (skb) | |
1344 | dev_kfree_skb_any(skb); | |
1345 | } | |
1346 | ||
4c352362 JK |
1347 | /** |
1348 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1349 | * @rx_ring: RX ring to receive from | |
1350 | * @budget: NAPI budget | |
1351 | * | |
1352 | * Note, this function is separated out from the napi poll function to | |
1353 | * more cleanly separate packet receive code from other bookkeeping | |
1354 | * functions performed in the napi poll function. | |
1355 | * | |
4c352362 JK |
1356 | * Return: Number of packets received. |
1357 | */ | |
1358 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1359 | { | |
1360 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1361 | struct nfp_net *nn = r_vec->nfp_net; | |
1362 | unsigned int data_len, meta_len; | |
4c352362 JK |
1363 | struct sk_buff *skb, *new_skb; |
1364 | struct nfp_net_rx_desc *rxd; | |
1365 | dma_addr_t new_dma_addr; | |
416db5c1 | 1366 | int pkts_polled = 0; |
4c352362 JK |
1367 | int idx; |
1368 | ||
416db5c1 | 1369 | while (pkts_polled < budget) { |
4c352362 JK |
1370 | idx = rx_ring->rd_p % rx_ring->cnt; |
1371 | ||
1372 | rxd = &rx_ring->rxds[idx]; | |
416db5c1 | 1373 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) |
4c352362 | 1374 | break; |
416db5c1 | 1375 | |
4c352362 JK |
1376 | /* Memory barrier to ensure that we won't do other reads |
1377 | * before the DD bit. | |
1378 | */ | |
1379 | dma_rmb(); | |
1380 | ||
1381 | rx_ring->rd_p++; | |
1382 | pkts_polled++; | |
4c352362 JK |
1383 | |
1384 | skb = rx_ring->rxbufs[idx].skb; | |
1385 | ||
30d21171 JK |
1386 | new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr, |
1387 | nn->fl_bufsz); | |
4c352362 | 1388 | if (!new_skb) { |
e9949aeb JK |
1389 | nfp_net_rx_drop(r_vec, rx_ring, &rx_ring->rxbufs[idx], |
1390 | NULL); | |
4c352362 JK |
1391 | continue; |
1392 | } | |
1393 | ||
1394 | dma_unmap_single(&nn->pdev->dev, | |
1395 | rx_ring->rxbufs[idx].dma_addr, | |
1396 | nn->fl_bufsz, DMA_FROM_DEVICE); | |
1397 | ||
1398 | nfp_net_rx_give_one(rx_ring, new_skb, new_dma_addr); | |
1399 | ||
180012dc JK |
1400 | /* < meta_len > |
1401 | * <-- [rx_offset] --> | |
1402 | * --------------------------------------------------------- | |
1403 | * | [XX] | metadata | packet | XXXX | | |
1404 | * --------------------------------------------------------- | |
1405 | * <---------------- data_len ---------------> | |
1406 | * | |
1407 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1408 | * on a packet by packet basis. If rx_offset is set to zero | |
1409 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1410 | * buffer and is immediately followed by the packet (no [XX]). | |
1411 | */ | |
4c352362 JK |
1412 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1413 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
1414 | ||
180012dc | 1415 | if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
4c352362 | 1416 | skb_reserve(skb, meta_len); |
180012dc | 1417 | else |
4c352362 | 1418 | skb_reserve(skb, nn->rx_offset); |
4c352362 JK |
1419 | skb_put(skb, data_len - meta_len); |
1420 | ||
4c352362 JK |
1421 | /* Stats update */ |
1422 | u64_stats_update_begin(&r_vec->rx_sync); | |
1423 | r_vec->rx_pkts++; | |
1424 | r_vec->rx_bytes += skb->len; | |
1425 | u64_stats_update_end(&r_vec->rx_sync); | |
1426 | ||
19d0f54e JK |
1427 | if (nn->fw_ver.major <= 3) { |
1428 | nfp_net_set_hash_desc(nn->netdev, skb, rxd); | |
1429 | } else if (meta_len) { | |
1430 | void *end; | |
1431 | ||
1432 | end = nfp_net_parse_meta(nn->netdev, skb, meta_len); | |
1433 | if (unlikely(end != skb->data)) { | |
19d0f54e | 1434 | nn_warn_ratelimit(nn, "invalid RX packet metadata\n"); |
e9949aeb | 1435 | nfp_net_rx_drop(r_vec, rx_ring, NULL, skb); |
19d0f54e JK |
1436 | continue; |
1437 | } | |
1438 | } | |
1439 | ||
4c352362 JK |
1440 | skb_record_rx_queue(skb, rx_ring->idx); |
1441 | skb->protocol = eth_type_trans(skb, nn->netdev); | |
1442 | ||
1443 | nfp_net_rx_csum(nn, r_vec, rxd, skb); | |
1444 | ||
1445 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) | |
1446 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
1447 | le16_to_cpu(rxd->rxd.vlan)); | |
1448 | ||
1449 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
1450 | } | |
1451 | ||
4c352362 JK |
1452 | return pkts_polled; |
1453 | } | |
1454 | ||
1455 | /** | |
1456 | * nfp_net_poll() - napi poll function | |
1457 | * @napi: NAPI structure | |
1458 | * @budget: NAPI budget | |
1459 | * | |
1460 | * Return: number of packets polled. | |
1461 | */ | |
1462 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
1463 | { | |
1464 | struct nfp_net_r_vector *r_vec = | |
1465 | container_of(napi, struct nfp_net_r_vector, napi); | |
4c352362 JK |
1466 | unsigned int pkts_polled; |
1467 | ||
7ff5c83a | 1468 | nfp_net_tx_complete(r_vec->tx_ring); |
4c352362 | 1469 | |
7ff5c83a | 1470 | pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); |
4c352362 JK |
1471 | |
1472 | if (pkts_polled < budget) { | |
1473 | napi_complete_done(napi, pkts_polled); | |
7ff5c83a | 1474 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_idx); |
4c352362 JK |
1475 | } |
1476 | ||
1477 | return pkts_polled; | |
1478 | } | |
1479 | ||
1480 | /* Setup and Configuration | |
1481 | */ | |
1482 | ||
1483 | /** | |
1484 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
1485 | * @tx_ring: TX ring to free | |
1486 | */ | |
1487 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
1488 | { | |
1489 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1490 | struct nfp_net *nn = r_vec->nfp_net; | |
1491 | struct pci_dev *pdev = nn->pdev; | |
1492 | ||
4c352362 JK |
1493 | kfree(tx_ring->txbufs); |
1494 | ||
1495 | if (tx_ring->txds) | |
1496 | dma_free_coherent(&pdev->dev, tx_ring->size, | |
1497 | tx_ring->txds, tx_ring->dma); | |
1498 | ||
1499 | tx_ring->cnt = 0; | |
4c352362 JK |
1500 | tx_ring->txbufs = NULL; |
1501 | tx_ring->txds = NULL; | |
1502 | tx_ring->dma = 0; | |
1503 | tx_ring->size = 0; | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
1508 | * @tx_ring: TX Ring structure to allocate | |
a98cb258 | 1509 | * @cnt: Ring buffer count |
4c352362 JK |
1510 | * |
1511 | * Return: 0 on success, negative errno otherwise. | |
1512 | */ | |
a98cb258 | 1513 | static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring, u32 cnt) |
4c352362 JK |
1514 | { |
1515 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1516 | struct nfp_net *nn = r_vec->nfp_net; | |
1517 | struct pci_dev *pdev = nn->pdev; | |
1518 | int sz; | |
1519 | ||
a98cb258 | 1520 | tx_ring->cnt = cnt; |
4c352362 JK |
1521 | |
1522 | tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; | |
1523 | tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, | |
1524 | &tx_ring->dma, GFP_KERNEL); | |
1525 | if (!tx_ring->txds) | |
1526 | goto err_alloc; | |
1527 | ||
1528 | sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; | |
1529 | tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); | |
1530 | if (!tx_ring->txbufs) | |
1531 | goto err_alloc; | |
1532 | ||
4c352362 JK |
1533 | netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); |
1534 | ||
1535 | nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", | |
1536 | tx_ring->idx, tx_ring->qcidx, | |
1537 | tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); | |
1538 | ||
1539 | return 0; | |
1540 | ||
1541 | err_alloc: | |
1542 | nfp_net_tx_ring_free(tx_ring); | |
1543 | return -ENOMEM; | |
1544 | } | |
1545 | ||
cc7c0333 JK |
1546 | static struct nfp_net_tx_ring * |
1547 | nfp_net_shadow_tx_rings_prepare(struct nfp_net *nn, u32 buf_cnt) | |
1548 | { | |
1549 | struct nfp_net_tx_ring *rings; | |
1550 | unsigned int r; | |
1551 | ||
1552 | rings = kcalloc(nn->num_tx_rings, sizeof(*rings), GFP_KERNEL); | |
1553 | if (!rings) | |
1554 | return NULL; | |
1555 | ||
1556 | for (r = 0; r < nn->num_tx_rings; r++) { | |
1557 | nfp_net_tx_ring_init(&rings[r], nn->tx_rings[r].r_vec, r); | |
1558 | ||
1559 | if (nfp_net_tx_ring_alloc(&rings[r], buf_cnt)) | |
1560 | goto err_free_prev; | |
1561 | } | |
1562 | ||
1563 | return rings; | |
1564 | ||
1565 | err_free_prev: | |
1566 | while (r--) | |
1567 | nfp_net_tx_ring_free(&rings[r]); | |
1568 | kfree(rings); | |
1569 | return NULL; | |
1570 | } | |
1571 | ||
1572 | static struct nfp_net_tx_ring * | |
1573 | nfp_net_shadow_tx_rings_swap(struct nfp_net *nn, struct nfp_net_tx_ring *rings) | |
1574 | { | |
1575 | struct nfp_net_tx_ring *old = nn->tx_rings; | |
1576 | unsigned int r; | |
1577 | ||
1578 | for (r = 0; r < nn->num_tx_rings; r++) | |
1579 | old[r].r_vec->tx_ring = &rings[r]; | |
1580 | ||
1581 | nn->tx_rings = rings; | |
1582 | return old; | |
1583 | } | |
1584 | ||
1585 | static void | |
1586 | nfp_net_shadow_tx_rings_free(struct nfp_net *nn, struct nfp_net_tx_ring *rings) | |
1587 | { | |
1588 | unsigned int r; | |
1589 | ||
1590 | if (!rings) | |
1591 | return; | |
1592 | ||
1593 | for (r = 0; r < nn->num_tx_rings; r++) | |
1594 | nfp_net_tx_ring_free(&rings[r]); | |
1595 | ||
1596 | kfree(rings); | |
1597 | } | |
1598 | ||
4c352362 JK |
1599 | /** |
1600 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
1601 | * @rx_ring: RX ring to free | |
1602 | */ | |
1603 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
1604 | { | |
1605 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1606 | struct nfp_net *nn = r_vec->nfp_net; | |
1607 | struct pci_dev *pdev = nn->pdev; | |
1608 | ||
4c352362 JK |
1609 | kfree(rx_ring->rxbufs); |
1610 | ||
1611 | if (rx_ring->rxds) | |
1612 | dma_free_coherent(&pdev->dev, rx_ring->size, | |
1613 | rx_ring->rxds, rx_ring->dma); | |
1614 | ||
1615 | rx_ring->cnt = 0; | |
4c352362 JK |
1616 | rx_ring->rxbufs = NULL; |
1617 | rx_ring->rxds = NULL; | |
1618 | rx_ring->dma = 0; | |
1619 | rx_ring->size = 0; | |
1620 | } | |
1621 | ||
1622 | /** | |
1623 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
1624 | * @rx_ring: RX ring to allocate | |
30d21171 | 1625 | * @fl_bufsz: Size of buffers to allocate |
a98cb258 | 1626 | * @cnt: Ring buffer count |
4c352362 JK |
1627 | * |
1628 | * Return: 0 on success, negative errno otherwise. | |
1629 | */ | |
30d21171 | 1630 | static int |
a98cb258 JK |
1631 | nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring, unsigned int fl_bufsz, |
1632 | u32 cnt) | |
4c352362 JK |
1633 | { |
1634 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1635 | struct nfp_net *nn = r_vec->nfp_net; | |
1636 | struct pci_dev *pdev = nn->pdev; | |
1637 | int sz; | |
1638 | ||
a98cb258 | 1639 | rx_ring->cnt = cnt; |
30d21171 | 1640 | rx_ring->bufsz = fl_bufsz; |
4c352362 JK |
1641 | |
1642 | rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; | |
1643 | rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, | |
1644 | &rx_ring->dma, GFP_KERNEL); | |
1645 | if (!rx_ring->rxds) | |
1646 | goto err_alloc; | |
1647 | ||
1648 | sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; | |
1649 | rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); | |
1650 | if (!rx_ring->rxbufs) | |
1651 | goto err_alloc; | |
1652 | ||
4c352362 JK |
1653 | nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", |
1654 | rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, | |
1655 | rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); | |
1656 | ||
1657 | return 0; | |
1658 | ||
1659 | err_alloc: | |
1660 | nfp_net_rx_ring_free(rx_ring); | |
1661 | return -ENOMEM; | |
1662 | } | |
1663 | ||
36a857e4 | 1664 | static struct nfp_net_rx_ring * |
a98cb258 JK |
1665 | nfp_net_shadow_rx_rings_prepare(struct nfp_net *nn, unsigned int fl_bufsz, |
1666 | u32 buf_cnt) | |
36a857e4 JK |
1667 | { |
1668 | struct nfp_net_rx_ring *rings; | |
1669 | unsigned int r; | |
1670 | ||
1671 | rings = kcalloc(nn->num_rx_rings, sizeof(*rings), GFP_KERNEL); | |
1672 | if (!rings) | |
1673 | return NULL; | |
1674 | ||
1675 | for (r = 0; r < nn->num_rx_rings; r++) { | |
1676 | nfp_net_rx_ring_init(&rings[r], nn->rx_rings[r].r_vec, r); | |
1677 | ||
a98cb258 | 1678 | if (nfp_net_rx_ring_alloc(&rings[r], fl_bufsz, buf_cnt)) |
36a857e4 JK |
1679 | goto err_free_prev; |
1680 | ||
1681 | if (nfp_net_rx_ring_bufs_alloc(nn, &rings[r])) | |
1682 | goto err_free_ring; | |
1683 | } | |
1684 | ||
1685 | return rings; | |
1686 | ||
1687 | err_free_prev: | |
1688 | while (r--) { | |
1689 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); | |
1690 | err_free_ring: | |
1691 | nfp_net_rx_ring_free(&rings[r]); | |
1692 | } | |
1693 | kfree(rings); | |
1694 | return NULL; | |
1695 | } | |
1696 | ||
1697 | static struct nfp_net_rx_ring * | |
1698 | nfp_net_shadow_rx_rings_swap(struct nfp_net *nn, struct nfp_net_rx_ring *rings) | |
1699 | { | |
1700 | struct nfp_net_rx_ring *old = nn->rx_rings; | |
1701 | unsigned int r; | |
1702 | ||
1703 | for (r = 0; r < nn->num_rx_rings; r++) | |
1704 | old[r].r_vec->rx_ring = &rings[r]; | |
1705 | ||
1706 | nn->rx_rings = rings; | |
1707 | return old; | |
1708 | } | |
1709 | ||
1710 | static void | |
1711 | nfp_net_shadow_rx_rings_free(struct nfp_net *nn, struct nfp_net_rx_ring *rings) | |
1712 | { | |
1713 | unsigned int r; | |
1714 | ||
cc7c0333 JK |
1715 | if (!rings) |
1716 | return; | |
1717 | ||
36a857e4 JK |
1718 | for (r = 0; r < nn->num_r_vecs; r++) { |
1719 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); | |
1720 | nfp_net_rx_ring_free(&rings[r]); | |
1721 | } | |
1722 | ||
1723 | kfree(rings); | |
1724 | } | |
1725 | ||
0afbfb18 JK |
1726 | static int |
1727 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1728 | int idx) | |
4c352362 | 1729 | { |
0afbfb18 JK |
1730 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
1731 | int err; | |
4c352362 | 1732 | |
73725d9d JK |
1733 | r_vec->tx_ring = &nn->tx_rings[idx]; |
1734 | nfp_net_tx_ring_init(r_vec->tx_ring, r_vec, idx); | |
1735 | ||
1736 | r_vec->rx_ring = &nn->rx_rings[idx]; | |
1737 | nfp_net_rx_ring_init(r_vec->rx_ring, r_vec, idx); | |
1738 | ||
0afbfb18 JK |
1739 | snprintf(r_vec->name, sizeof(r_vec->name), |
1740 | "%s-rxtx-%d", nn->netdev->name, idx); | |
1741 | err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec); | |
1742 | if (err) { | |
1743 | nn_err(nn, "Error requesting IRQ %d\n", entry->vector); | |
1744 | return err; | |
1745 | } | |
aba52df8 | 1746 | disable_irq(entry->vector); |
4c352362 | 1747 | |
0afbfb18 JK |
1748 | /* Setup NAPI */ |
1749 | netif_napi_add(nn->netdev, &r_vec->napi, | |
1750 | nfp_net_poll, NAPI_POLL_WEIGHT); | |
4c352362 | 1751 | |
0afbfb18 | 1752 | irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); |
4c352362 | 1753 | |
0afbfb18 | 1754 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry); |
4c352362 | 1755 | |
0afbfb18 | 1756 | return 0; |
4c352362 JK |
1757 | } |
1758 | ||
0afbfb18 JK |
1759 | static void |
1760 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 1761 | { |
0afbfb18 | 1762 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
4c352362 | 1763 | |
4c352362 | 1764 | irq_set_affinity_hint(entry->vector, NULL); |
4c352362 | 1765 | netif_napi_del(&r_vec->napi); |
0afbfb18 | 1766 | free_irq(entry->vector, r_vec); |
4c352362 JK |
1767 | } |
1768 | ||
1769 | /** | |
1770 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
1771 | * @nn: NFP Net device to reconfigure | |
1772 | */ | |
1773 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
1774 | { | |
1775 | int i; | |
1776 | ||
1777 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
1778 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
1779 | get_unaligned_le32(nn->rss_itbl + i)); | |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
1784 | * @nn: NFP Net device to reconfigure | |
1785 | */ | |
1786 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
1787 | { | |
1788 | int i; | |
1789 | ||
1790 | for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) | |
1791 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, | |
1792 | get_unaligned_le32(nn->rss_key + i)); | |
1793 | } | |
1794 | ||
1795 | /** | |
1796 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
1797 | * @nn: NFP Net device to reconfigure | |
1798 | */ | |
1799 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
1800 | { | |
1801 | u8 i; | |
1802 | u32 factor; | |
1803 | u32 value; | |
1804 | ||
1805 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
1806 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
1807 | * count. | |
1808 | */ | |
1809 | factor = nn->me_freq_mhz / 16; | |
1810 | ||
1811 | /* copy RX interrupt coalesce parameters */ | |
1812 | value = (nn->rx_coalesce_max_frames << 16) | | |
1813 | (factor * nn->rx_coalesce_usecs); | |
1814 | for (i = 0; i < nn->num_r_vecs; i++) | |
1815 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); | |
1816 | ||
1817 | /* copy TX interrupt coalesce parameters */ | |
1818 | value = (nn->tx_coalesce_max_frames << 16) | | |
1819 | (factor * nn->tx_coalesce_usecs); | |
1820 | for (i = 0; i < nn->num_r_vecs; i++) | |
1821 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); | |
1822 | } | |
1823 | ||
1824 | /** | |
f642963b | 1825 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 1826 | * @nn: NFP Net device to reconfigure |
4c352362 | 1827 | * |
f642963b JK |
1828 | * Writes the MAC address from the netdev to the device control BAR. Does not |
1829 | * perform the required reconfig. We do a bit of byte swapping dance because | |
1830 | * firmware is LE. | |
4c352362 | 1831 | */ |
f642963b | 1832 | static void nfp_net_write_mac_addr(struct nfp_net *nn) |
4c352362 JK |
1833 | { |
1834 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, | |
1835 | get_unaligned_be32(nn->netdev->dev_addr)); | |
416db5c1 JK |
1836 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, |
1837 | get_unaligned_be16(nn->netdev->dev_addr + 4)); | |
4c352362 JK |
1838 | } |
1839 | ||
ca40feab JK |
1840 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
1841 | { | |
1842 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
1843 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
1844 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
1845 | ||
1846 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
1847 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
1848 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
1849 | } | |
1850 | ||
4c352362 JK |
1851 | /** |
1852 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
1853 | * @nn: NFP Net device to reconfigure | |
1854 | */ | |
1855 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
1856 | { | |
1857 | u32 new_ctrl, update; | |
ca40feab | 1858 | unsigned int r; |
4c352362 JK |
1859 | int err; |
1860 | ||
1861 | new_ctrl = nn->ctrl; | |
1862 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; | |
1863 | update = NFP_NET_CFG_UPDATE_GEN; | |
1864 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1865 | update |= NFP_NET_CFG_UPDATE_RING; | |
1866 | ||
1867 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1868 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
1869 | ||
1870 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
1871 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
1872 | ||
1873 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1874 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 1875 | if (err) |
4c352362 | 1876 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 1877 | |
aba52df8 JK |
1878 | for (r = 0; r < nn->num_r_vecs; r++) { |
1879 | nfp_net_rx_ring_reset(nn->r_vecs[r].rx_ring); | |
1880 | nfp_net_tx_ring_reset(nn, nn->r_vecs[r].tx_ring); | |
ca40feab | 1881 | nfp_net_vec_clear_ring_data(nn, r); |
aba52df8 | 1882 | } |
ca40feab | 1883 | |
4c352362 JK |
1884 | nn->ctrl = new_ctrl; |
1885 | } | |
1886 | ||
ca40feab JK |
1887 | static void |
1888 | nfp_net_vec_write_ring_data(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1889 | unsigned int idx) | |
1890 | { | |
1891 | /* Write the DMA address, size and MSI-X info to the device */ | |
1892 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), r_vec->rx_ring->dma); | |
1893 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(r_vec->rx_ring->cnt)); | |
1894 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), r_vec->irq_idx); | |
1895 | ||
1896 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), r_vec->tx_ring->dma); | |
1897 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(r_vec->tx_ring->cnt)); | |
1898 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), r_vec->irq_idx); | |
1899 | } | |
1900 | ||
1cd0cfc4 JK |
1901 | static int __nfp_net_set_config_and_enable(struct nfp_net *nn) |
1902 | { | |
1903 | u32 new_ctrl, update = 0; | |
1904 | unsigned int r; | |
1905 | int err; | |
1906 | ||
1907 | new_ctrl = nn->ctrl; | |
1908 | ||
1909 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
1910 | nfp_net_rss_write_key(nn); | |
1911 | nfp_net_rss_write_itbl(nn); | |
1912 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
1913 | update |= NFP_NET_CFG_UPDATE_RSS; | |
1914 | } | |
1915 | ||
1916 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
1917 | nfp_net_coalesce_write_cfg(nn); | |
1918 | ||
1919 | new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
1920 | update |= NFP_NET_CFG_UPDATE_IRQMOD; | |
1921 | } | |
1922 | ||
1923 | for (r = 0; r < nn->num_r_vecs; r++) | |
1924 | nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r); | |
1925 | ||
1926 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? | |
1927 | 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); | |
1928 | ||
1929 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? | |
1930 | 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); | |
1931 | ||
f642963b | 1932 | nfp_net_write_mac_addr(nn); |
1cd0cfc4 JK |
1933 | |
1934 | nn_writel(nn, NFP_NET_CFG_MTU, nn->netdev->mtu); | |
1935 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); | |
1936 | ||
1937 | /* Enable device */ | |
1938 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
1939 | update |= NFP_NET_CFG_UPDATE_GEN; | |
1940 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1941 | update |= NFP_NET_CFG_UPDATE_RING; | |
1942 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1943 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
1944 | ||
1945 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1946 | err = nfp_net_reconfig(nn, update); | |
1947 | ||
1948 | nn->ctrl = new_ctrl; | |
1949 | ||
aba52df8 JK |
1950 | for (r = 0; r < nn->num_r_vecs; r++) |
1951 | nfp_net_rx_ring_fill_freelist(nn->r_vecs[r].rx_ring); | |
1952 | ||
1cd0cfc4 JK |
1953 | /* Since reconfiguration requests while NFP is down are ignored we |
1954 | * have to wipe the entire VXLAN configuration and reinitialize it. | |
1955 | */ | |
1956 | if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { | |
1957 | memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); | |
1958 | memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); | |
3ab68837 | 1959 | udp_tunnel_get_rx_info(nn->netdev); |
1cd0cfc4 JK |
1960 | } |
1961 | ||
1962 | return err; | |
1963 | } | |
1964 | ||
1965 | /** | |
1966 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
1967 | * @nn: NFP Net device to reconfigure | |
1968 | */ | |
1969 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
1970 | { | |
1971 | int err; | |
1972 | ||
1973 | err = __nfp_net_set_config_and_enable(nn); | |
1974 | if (err) | |
1975 | nfp_net_clear_config_and_disable(nn); | |
1976 | ||
1977 | return err; | |
1978 | } | |
1979 | ||
1cd0cfc4 JK |
1980 | /** |
1981 | * nfp_net_open_stack() - Start the device from stack's perspective | |
1982 | * @nn: NFP Net device to reconfigure | |
1983 | */ | |
1984 | static void nfp_net_open_stack(struct nfp_net *nn) | |
1985 | { | |
1986 | unsigned int r; | |
1987 | ||
aba52df8 JK |
1988 | for (r = 0; r < nn->num_r_vecs; r++) { |
1989 | napi_enable(&nn->r_vecs[r].napi); | |
1990 | enable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
1991 | } | |
1cd0cfc4 JK |
1992 | |
1993 | netif_tx_wake_all_queues(nn->netdev); | |
1994 | ||
ce449ba7 | 1995 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
1996 | nfp_net_read_link_status(nn); |
1997 | } | |
1998 | ||
4c352362 JK |
1999 | static int nfp_net_netdev_open(struct net_device *netdev) |
2000 | { | |
2001 | struct nfp_net *nn = netdev_priv(netdev); | |
2002 | int err, r; | |
4c352362 JK |
2003 | |
2004 | if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { | |
2005 | nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); | |
2006 | return -EBUSY; | |
2007 | } | |
2008 | ||
4c352362 JK |
2009 | /* Step 1: Allocate resources for rings and the like |
2010 | * - Request interrupts | |
2011 | * - Allocate RX and TX ring resources | |
2012 | * - Setup initial RSS table | |
2013 | */ | |
2014 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", | |
2015 | nn->exn_name, sizeof(nn->exn_name), | |
2016 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2017 | if (err) | |
2018 | return err; | |
0ba40af9 JK |
2019 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2020 | nn->lsc_name, sizeof(nn->lsc_name), | |
2021 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2022 | if (err) | |
2023 | goto err_free_exn; | |
ce449ba7 | 2024 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2025 | |
73725d9d JK |
2026 | nn->rx_rings = kcalloc(nn->num_rx_rings, sizeof(*nn->rx_rings), |
2027 | GFP_KERNEL); | |
bc6c03fa WY |
2028 | if (!nn->rx_rings) { |
2029 | err = -ENOMEM; | |
73725d9d | 2030 | goto err_free_lsc; |
bc6c03fa | 2031 | } |
73725d9d JK |
2032 | nn->tx_rings = kcalloc(nn->num_tx_rings, sizeof(*nn->tx_rings), |
2033 | GFP_KERNEL); | |
bc6c03fa WY |
2034 | if (!nn->tx_rings) { |
2035 | err = -ENOMEM; | |
73725d9d | 2036 | goto err_free_rx_rings; |
bc6c03fa | 2037 | } |
73725d9d | 2038 | |
0afbfb18 JK |
2039 | for (r = 0; r < nn->num_r_vecs; r++) { |
2040 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); | |
2041 | if (err) | |
2042 | goto err_free_prev_vecs; | |
2043 | ||
a98cb258 | 2044 | err = nfp_net_tx_ring_alloc(nn->r_vecs[r].tx_ring, nn->txd_cnt); |
0afbfb18 JK |
2045 | if (err) |
2046 | goto err_cleanup_vec_p; | |
2047 | ||
30d21171 | 2048 | err = nfp_net_rx_ring_alloc(nn->r_vecs[r].rx_ring, |
a98cb258 | 2049 | nn->fl_bufsz, nn->rxd_cnt); |
0afbfb18 JK |
2050 | if (err) |
2051 | goto err_free_tx_ring_p; | |
114bdef0 JK |
2052 | |
2053 | err = nfp_net_rx_ring_bufs_alloc(nn, nn->r_vecs[r].rx_ring); | |
2054 | if (err) | |
2055 | goto err_flush_rx_ring_p; | |
0afbfb18 | 2056 | } |
4c352362 JK |
2057 | |
2058 | err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); | |
2059 | if (err) | |
2060 | goto err_free_rings; | |
2061 | ||
2062 | err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); | |
2063 | if (err) | |
2064 | goto err_free_rings; | |
2065 | ||
4c352362 JK |
2066 | /* Step 2: Configure the NFP |
2067 | * - Enable rings from 0 to tx_rings/rx_rings - 1. | |
2068 | * - Write MAC address (in case it changed) | |
2069 | * - Set the MTU | |
2070 | * - Set the Freelist buffer size | |
2071 | * - Enable the FW | |
2072 | */ | |
1cd0cfc4 | 2073 | err = nfp_net_set_config_and_enable(nn); |
4c352362 | 2074 | if (err) |
1cd0cfc4 | 2075 | goto err_free_rings; |
4c352362 JK |
2076 | |
2077 | /* Step 3: Enable for kernel | |
2078 | * - put some freelist descriptors on each RX ring | |
2079 | * - enable NAPI on each ring | |
2080 | * - enable all TX queues | |
2081 | * - set link state | |
2082 | */ | |
1cd0cfc4 | 2083 | nfp_net_open_stack(nn); |
4c352362 JK |
2084 | |
2085 | return 0; | |
2086 | ||
4c352362 | 2087 | err_free_rings: |
0afbfb18 JK |
2088 | r = nn->num_r_vecs; |
2089 | err_free_prev_vecs: | |
2090 | while (r--) { | |
114bdef0 JK |
2091 | nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring); |
2092 | err_flush_rx_ring_p: | |
0afbfb18 JK |
2093 | nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); |
2094 | err_free_tx_ring_p: | |
2095 | nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); | |
2096 | err_cleanup_vec_p: | |
2097 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
2098 | } | |
73725d9d JK |
2099 | kfree(nn->tx_rings); |
2100 | err_free_rx_rings: | |
2101 | kfree(nn->rx_rings); | |
2102 | err_free_lsc: | |
0ba40af9 | 2103 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 JK |
2104 | err_free_exn: |
2105 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2106 | return err; | |
2107 | } | |
2108 | ||
2109 | /** | |
1cd0cfc4 JK |
2110 | * nfp_net_close_stack() - Quiescent the stack (part of close) |
2111 | * @nn: NFP Net device to reconfigure | |
4c352362 | 2112 | */ |
1cd0cfc4 | 2113 | static void nfp_net_close_stack(struct nfp_net *nn) |
4c352362 | 2114 | { |
1cd0cfc4 | 2115 | unsigned int r; |
4c352362 | 2116 | |
ce449ba7 | 2117 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 | 2118 | netif_carrier_off(nn->netdev); |
4c352362 JK |
2119 | nn->link_up = false; |
2120 | ||
aba52df8 JK |
2121 | for (r = 0; r < nn->num_r_vecs; r++) { |
2122 | disable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
4c352362 | 2123 | napi_disable(&nn->r_vecs[r].napi); |
aba52df8 | 2124 | } |
4c352362 | 2125 | |
1cd0cfc4 JK |
2126 | netif_tx_disable(nn->netdev); |
2127 | } | |
4c352362 | 2128 | |
1cd0cfc4 JK |
2129 | /** |
2130 | * nfp_net_close_free_all() - Free all runtime resources | |
2131 | * @nn: NFP Net device to reconfigure | |
2132 | */ | |
2133 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2134 | { | |
2135 | unsigned int r; | |
4c352362 | 2136 | |
4c352362 | 2137 | for (r = 0; r < nn->num_r_vecs; r++) { |
1934680f | 2138 | nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring); |
0afbfb18 JK |
2139 | nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring); |
2140 | nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring); | |
2141 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
4c352362 JK |
2142 | } |
2143 | ||
73725d9d JK |
2144 | kfree(nn->rx_rings); |
2145 | kfree(nn->tx_rings); | |
2146 | ||
0ba40af9 | 2147 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 | 2148 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); |
1cd0cfc4 JK |
2149 | } |
2150 | ||
2151 | /** | |
2152 | * nfp_net_netdev_close() - Called when the device is downed | |
2153 | * @netdev: netdev structure | |
2154 | */ | |
2155 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2156 | { | |
2157 | struct nfp_net *nn = netdev_priv(netdev); | |
2158 | ||
2159 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { | |
2160 | nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); | |
2161 | return 0; | |
2162 | } | |
2163 | ||
2164 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective | |
2165 | */ | |
2166 | nfp_net_close_stack(nn); | |
2167 | ||
2168 | /* Step 2: Tell NFP | |
2169 | */ | |
2170 | nfp_net_clear_config_and_disable(nn); | |
2171 | ||
2172 | /* Step 3: Free resources | |
2173 | */ | |
2174 | nfp_net_close_free_all(nn); | |
4c352362 JK |
2175 | |
2176 | nn_dbg(nn, "%s down", netdev->name); | |
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | static void nfp_net_set_rx_mode(struct net_device *netdev) | |
2181 | { | |
2182 | struct nfp_net *nn = netdev_priv(netdev); | |
2183 | u32 new_ctrl; | |
2184 | ||
2185 | new_ctrl = nn->ctrl; | |
2186 | ||
2187 | if (netdev->flags & IFF_PROMISC) { | |
2188 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
2189 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
2190 | else | |
2191 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
2192 | } else { | |
2193 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
2194 | } | |
2195 | ||
2196 | if (new_ctrl == nn->ctrl) | |
2197 | return; | |
2198 | ||
2199 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 2200 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 JK |
2201 | |
2202 | nn->ctrl = new_ctrl; | |
2203 | } | |
2204 | ||
2205 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
2206 | { | |
36a857e4 | 2207 | unsigned int old_mtu, old_fl_bufsz, new_fl_bufsz; |
4c352362 | 2208 | struct nfp_net *nn = netdev_priv(netdev); |
36a857e4 JK |
2209 | struct nfp_net_rx_ring *tmp_rings; |
2210 | int err; | |
4c352362 | 2211 | |
36a857e4 JK |
2212 | old_mtu = netdev->mtu; |
2213 | old_fl_bufsz = nn->fl_bufsz; | |
bf187ea0 | 2214 | new_fl_bufsz = nfp_net_calc_fl_bufsz(nn, new_mtu); |
36a857e4 JK |
2215 | |
2216 | if (!netif_running(netdev)) { | |
2217 | netdev->mtu = new_mtu; | |
2218 | nn->fl_bufsz = new_fl_bufsz; | |
2219 | return 0; | |
2220 | } | |
2221 | ||
2222 | /* Prepare new rings */ | |
a98cb258 JK |
2223 | tmp_rings = nfp_net_shadow_rx_rings_prepare(nn, new_fl_bufsz, |
2224 | nn->rxd_cnt); | |
36a857e4 JK |
2225 | if (!tmp_rings) |
2226 | return -ENOMEM; | |
2227 | ||
2228 | /* Stop device, swap in new rings, try to start the firmware */ | |
2229 | nfp_net_close_stack(nn); | |
2230 | nfp_net_clear_config_and_disable(nn); | |
2231 | ||
2232 | tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings); | |
2233 | ||
4c352362 | 2234 | netdev->mtu = new_mtu; |
36a857e4 JK |
2235 | nn->fl_bufsz = new_fl_bufsz; |
2236 | ||
2237 | err = nfp_net_set_config_and_enable(nn); | |
2238 | if (err) { | |
2239 | const int err_new = err; | |
2240 | ||
2241 | /* Try with old configuration and old rings */ | |
2242 | tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings); | |
2243 | ||
2244 | netdev->mtu = old_mtu; | |
2245 | nn->fl_bufsz = old_fl_bufsz; | |
4c352362 | 2246 | |
36a857e4 JK |
2247 | err = __nfp_net_set_config_and_enable(nn); |
2248 | if (err) | |
2249 | nn_err(nn, "Can't restore MTU - FW communication failed (%d,%d)\n", | |
2250 | err_new, err); | |
4c352362 JK |
2251 | } |
2252 | ||
36a857e4 JK |
2253 | nfp_net_shadow_rx_rings_free(nn, tmp_rings); |
2254 | ||
2255 | nfp_net_open_stack(nn); | |
2256 | ||
2257 | return err; | |
4c352362 JK |
2258 | } |
2259 | ||
cc7c0333 JK |
2260 | int nfp_net_set_ring_size(struct nfp_net *nn, u32 rxd_cnt, u32 txd_cnt) |
2261 | { | |
2262 | struct nfp_net_tx_ring *tx_rings = NULL; | |
2263 | struct nfp_net_rx_ring *rx_rings = NULL; | |
2264 | u32 old_rxd_cnt, old_txd_cnt; | |
2265 | int err; | |
2266 | ||
2267 | if (!netif_running(nn->netdev)) { | |
2268 | nn->rxd_cnt = rxd_cnt; | |
2269 | nn->txd_cnt = txd_cnt; | |
2270 | return 0; | |
2271 | } | |
2272 | ||
2273 | old_rxd_cnt = nn->rxd_cnt; | |
2274 | old_txd_cnt = nn->txd_cnt; | |
2275 | ||
2276 | /* Prepare new rings */ | |
2277 | if (nn->rxd_cnt != rxd_cnt) { | |
2278 | rx_rings = nfp_net_shadow_rx_rings_prepare(nn, nn->fl_bufsz, | |
2279 | rxd_cnt); | |
2280 | if (!rx_rings) | |
2281 | return -ENOMEM; | |
2282 | } | |
2283 | if (nn->txd_cnt != txd_cnt) { | |
2284 | tx_rings = nfp_net_shadow_tx_rings_prepare(nn, txd_cnt); | |
2285 | if (!tx_rings) { | |
2286 | nfp_net_shadow_rx_rings_free(nn, rx_rings); | |
2287 | return -ENOMEM; | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | /* Stop device, swap in new rings, try to start the firmware */ | |
2292 | nfp_net_close_stack(nn); | |
2293 | nfp_net_clear_config_and_disable(nn); | |
2294 | ||
2295 | if (rx_rings) | |
2296 | rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings); | |
2297 | if (tx_rings) | |
2298 | tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings); | |
2299 | ||
2300 | nn->rxd_cnt = rxd_cnt; | |
2301 | nn->txd_cnt = txd_cnt; | |
2302 | ||
2303 | err = nfp_net_set_config_and_enable(nn); | |
2304 | if (err) { | |
2305 | const int err_new = err; | |
2306 | ||
2307 | /* Try with old configuration and old rings */ | |
2308 | if (rx_rings) | |
2309 | rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings); | |
2310 | if (tx_rings) | |
2311 | tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings); | |
2312 | ||
2313 | nn->rxd_cnt = old_rxd_cnt; | |
2314 | nn->txd_cnt = old_txd_cnt; | |
2315 | ||
2316 | err = __nfp_net_set_config_and_enable(nn); | |
2317 | if (err) | |
2318 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", | |
2319 | err_new, err); | |
2320 | } | |
2321 | ||
2322 | nfp_net_shadow_rx_rings_free(nn, rx_rings); | |
2323 | nfp_net_shadow_tx_rings_free(nn, tx_rings); | |
2324 | ||
2325 | nfp_net_open_stack(nn); | |
2326 | ||
2327 | return err; | |
2328 | } | |
2329 | ||
4c352362 JK |
2330 | static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, |
2331 | struct rtnl_link_stats64 *stats) | |
2332 | { | |
2333 | struct nfp_net *nn = netdev_priv(netdev); | |
2334 | int r; | |
2335 | ||
2336 | for (r = 0; r < nn->num_r_vecs; r++) { | |
2337 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; | |
2338 | u64 data[3]; | |
2339 | unsigned int start; | |
2340 | ||
2341 | do { | |
2342 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
2343 | data[0] = r_vec->rx_pkts; | |
2344 | data[1] = r_vec->rx_bytes; | |
2345 | data[2] = r_vec->rx_drops; | |
2346 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
2347 | stats->rx_packets += data[0]; | |
2348 | stats->rx_bytes += data[1]; | |
2349 | stats->rx_dropped += data[2]; | |
2350 | ||
2351 | do { | |
2352 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
2353 | data[0] = r_vec->tx_pkts; | |
2354 | data[1] = r_vec->tx_bytes; | |
2355 | data[2] = r_vec->tx_errors; | |
2356 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
2357 | stats->tx_packets += data[0]; | |
2358 | stats->tx_bytes += data[1]; | |
2359 | stats->tx_errors += data[2]; | |
2360 | } | |
2361 | ||
2362 | return stats; | |
2363 | } | |
2364 | ||
7533fdc0 JK |
2365 | static bool nfp_net_ebpf_capable(struct nfp_net *nn) |
2366 | { | |
2367 | if (nn->cap & NFP_NET_CFG_CTRL_BPF && | |
2368 | nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI) | |
2369 | return true; | |
2370 | return false; | |
2371 | } | |
2372 | ||
2373 | static int | |
2374 | nfp_net_setup_tc(struct net_device *netdev, u32 handle, __be16 proto, | |
2375 | struct tc_to_netdev *tc) | |
2376 | { | |
2377 | struct nfp_net *nn = netdev_priv(netdev); | |
2378 | ||
2379 | if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS)) | |
2380 | return -ENOTSUPP; | |
2381 | if (proto != htons(ETH_P_ALL)) | |
2382 | return -ENOTSUPP; | |
2383 | ||
2384 | if (tc->type == TC_SETUP_CLSBPF && nfp_net_ebpf_capable(nn)) | |
2385 | return nfp_net_bpf_offload(nn, handle, proto, tc->cls_bpf); | |
2386 | ||
2387 | return -EINVAL; | |
2388 | } | |
2389 | ||
4c352362 JK |
2390 | static int nfp_net_set_features(struct net_device *netdev, |
2391 | netdev_features_t features) | |
2392 | { | |
2393 | netdev_features_t changed = netdev->features ^ features; | |
2394 | struct nfp_net *nn = netdev_priv(netdev); | |
2395 | u32 new_ctrl; | |
2396 | int err; | |
2397 | ||
2398 | /* Assume this is not called with features we have not advertised */ | |
2399 | ||
2400 | new_ctrl = nn->ctrl; | |
2401 | ||
2402 | if (changed & NETIF_F_RXCSUM) { | |
2403 | if (features & NETIF_F_RXCSUM) | |
2404 | new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2405 | else | |
2406 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; | |
2407 | } | |
2408 | ||
2409 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
2410 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
2411 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2412 | else | |
2413 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
2414 | } | |
2415 | ||
2416 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
2417 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
2418 | new_ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2419 | else | |
2420 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; | |
2421 | } | |
2422 | ||
2423 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
2424 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
2425 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2426 | else | |
2427 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
2428 | } | |
2429 | ||
2430 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
2431 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
2432 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2433 | else | |
2434 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
2435 | } | |
2436 | ||
2437 | if (changed & NETIF_F_SG) { | |
2438 | if (features & NETIF_F_SG) | |
2439 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2440 | else | |
2441 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
2442 | } | |
2443 | ||
7533fdc0 JK |
2444 | if (changed & NETIF_F_HW_TC && nn->ctrl & NFP_NET_CFG_CTRL_BPF) { |
2445 | nn_err(nn, "Cannot disable HW TC offload while in use\n"); | |
2446 | return -EBUSY; | |
2447 | } | |
2448 | ||
4c352362 JK |
2449 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", |
2450 | netdev->features, features, changed); | |
2451 | ||
2452 | if (new_ctrl == nn->ctrl) | |
2453 | return 0; | |
2454 | ||
2455 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); | |
2456 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2457 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
2458 | if (err) | |
2459 | return err; | |
2460 | ||
2461 | nn->ctrl = new_ctrl; | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | ||
2466 | static netdev_features_t | |
2467 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
2468 | netdev_features_t features) | |
2469 | { | |
2470 | u8 l4_hdr; | |
2471 | ||
2472 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
2473 | features &= vlan_features_check(skb, features); | |
2474 | ||
2475 | if (!skb->encapsulation) | |
2476 | return features; | |
2477 | ||
2478 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
2479 | if (skb_is_gso(skb)) { | |
2480 | u32 hdrlen; | |
2481 | ||
2482 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
2483 | inner_tcp_hdrlen(skb); | |
2484 | ||
2485 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) | |
2486 | features &= ~NETIF_F_GSO_MASK; | |
2487 | } | |
2488 | ||
2489 | /* VXLAN/GRE check */ | |
2490 | switch (vlan_get_protocol(skb)) { | |
2491 | case htons(ETH_P_IP): | |
2492 | l4_hdr = ip_hdr(skb)->protocol; | |
2493 | break; | |
2494 | case htons(ETH_P_IPV6): | |
2495 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
2496 | break; | |
2497 | default: | |
a188222b | 2498 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2499 | } |
2500 | ||
2501 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
2502 | skb->inner_protocol != htons(ETH_P_TEB) || | |
2503 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
2504 | (l4_hdr == IPPROTO_UDP && | |
2505 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
2506 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 2507 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2508 | |
2509 | return features; | |
2510 | } | |
2511 | ||
2512 | /** | |
2513 | * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW | |
2514 | * @nn: NFP Net device to reconfigure | |
2515 | * @idx: Index into the port table where new port should be written | |
2516 | * @port: UDP port to configure (pass zero to remove VXLAN port) | |
2517 | */ | |
2518 | static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) | |
2519 | { | |
2520 | int i; | |
2521 | ||
2522 | nn->vxlan_ports[idx] = port; | |
2523 | ||
2524 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) | |
2525 | return; | |
2526 | ||
2527 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
2528 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) | |
2529 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), | |
2530 | be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | | |
2531 | be16_to_cpu(nn->vxlan_ports[i])); | |
2532 | ||
3d780b92 | 2533 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN); |
4c352362 JK |
2534 | } |
2535 | ||
2536 | /** | |
2537 | * nfp_net_find_vxlan_idx() - find table entry of the port or a free one | |
2538 | * @nn: NFP Network structure | |
2539 | * @port: UDP port to look for | |
2540 | * | |
2541 | * Return: if the port is already in the table -- it's position; | |
2542 | * if the port is not in the table -- free position to use; | |
2543 | * if the table is full -- -ENOSPC. | |
2544 | */ | |
2545 | static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) | |
2546 | { | |
2547 | int i, free_idx = -ENOSPC; | |
2548 | ||
2549 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { | |
2550 | if (nn->vxlan_ports[i] == port) | |
2551 | return i; | |
2552 | if (!nn->vxlan_usecnt[i]) | |
2553 | free_idx = i; | |
2554 | } | |
2555 | ||
2556 | return free_idx; | |
2557 | } | |
2558 | ||
2559 | static void nfp_net_add_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2560 | struct udp_tunnel_info *ti) |
4c352362 JK |
2561 | { |
2562 | struct nfp_net *nn = netdev_priv(netdev); | |
2563 | int idx; | |
2564 | ||
3ab68837 AD |
2565 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2566 | return; | |
2567 | ||
2568 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
4c352362 JK |
2569 | if (idx == -ENOSPC) |
2570 | return; | |
2571 | ||
2572 | if (!nn->vxlan_usecnt[idx]++) | |
3ab68837 | 2573 | nfp_net_set_vxlan_port(nn, idx, ti->port); |
4c352362 JK |
2574 | } |
2575 | ||
2576 | static void nfp_net_del_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2577 | struct udp_tunnel_info *ti) |
4c352362 JK |
2578 | { |
2579 | struct nfp_net *nn = netdev_priv(netdev); | |
2580 | int idx; | |
2581 | ||
3ab68837 AD |
2582 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2583 | return; | |
2584 | ||
2585 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
f50cef6f | 2586 | if (idx == -ENOSPC || !nn->vxlan_usecnt[idx]) |
4c352362 JK |
2587 | return; |
2588 | ||
2589 | if (!--nn->vxlan_usecnt[idx]) | |
2590 | nfp_net_set_vxlan_port(nn, idx, 0); | |
2591 | } | |
2592 | ||
2593 | static const struct net_device_ops nfp_net_netdev_ops = { | |
2594 | .ndo_open = nfp_net_netdev_open, | |
2595 | .ndo_stop = nfp_net_netdev_close, | |
2596 | .ndo_start_xmit = nfp_net_tx, | |
2597 | .ndo_get_stats64 = nfp_net_stat64, | |
7533fdc0 | 2598 | .ndo_setup_tc = nfp_net_setup_tc, |
4c352362 JK |
2599 | .ndo_tx_timeout = nfp_net_tx_timeout, |
2600 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
2601 | .ndo_change_mtu = nfp_net_change_mtu, | |
2602 | .ndo_set_mac_address = eth_mac_addr, | |
2603 | .ndo_set_features = nfp_net_set_features, | |
2604 | .ndo_features_check = nfp_net_features_check, | |
3ab68837 AD |
2605 | .ndo_udp_tunnel_add = nfp_net_add_vxlan_port, |
2606 | .ndo_udp_tunnel_del = nfp_net_del_vxlan_port, | |
4c352362 JK |
2607 | }; |
2608 | ||
2609 | /** | |
2610 | * nfp_net_info() - Print general info about the NIC | |
2611 | * @nn: NFP Net device to reconfigure | |
2612 | */ | |
2613 | void nfp_net_info(struct nfp_net *nn) | |
2614 | { | |
416db5c1 | 2615 | nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", |
4c352362 JK |
2616 | nn->is_vf ? "VF " : "", |
2617 | nn->num_tx_rings, nn->max_tx_rings, | |
2618 | nn->num_rx_rings, nn->max_rx_rings); | |
2619 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", | |
2620 | nn->fw_ver.resv, nn->fw_ver.class, | |
2621 | nn->fw_ver.major, nn->fw_ver.minor, | |
2622 | nn->max_mtu); | |
7533fdc0 | 2623 | nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
4c352362 JK |
2624 | nn->cap, |
2625 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
2626 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
2627 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
2628 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
2629 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
2630 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
2631 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
2632 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
2633 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
2634 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", | |
2635 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", | |
2636 | nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", | |
2637 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", | |
2638 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
2639 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
7533fdc0 JK |
2640 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", |
2641 | nfp_net_ebpf_capable(nn) ? "BPF " : ""); | |
4c352362 JK |
2642 | } |
2643 | ||
2644 | /** | |
2645 | * nfp_net_netdev_alloc() - Allocate netdev and related structure | |
2646 | * @pdev: PCI device | |
2647 | * @max_tx_rings: Maximum number of TX rings supported by device | |
2648 | * @max_rx_rings: Maximum number of RX rings supported by device | |
2649 | * | |
2650 | * This function allocates a netdev device and fills in the initial | |
2651 | * part of the @struct nfp_net structure. | |
2652 | * | |
2653 | * Return: NFP Net device structure, or ERR_PTR on error. | |
2654 | */ | |
2655 | struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, | |
2656 | int max_tx_rings, int max_rx_rings) | |
2657 | { | |
2658 | struct net_device *netdev; | |
2659 | struct nfp_net *nn; | |
2660 | int nqs; | |
2661 | ||
2662 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), | |
2663 | max_tx_rings, max_rx_rings); | |
2664 | if (!netdev) | |
2665 | return ERR_PTR(-ENOMEM); | |
2666 | ||
2667 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2668 | nn = netdev_priv(netdev); | |
2669 | ||
2670 | nn->netdev = netdev; | |
2671 | nn->pdev = pdev; | |
2672 | ||
2673 | nn->max_tx_rings = max_tx_rings; | |
2674 | nn->max_rx_rings = max_rx_rings; | |
2675 | ||
2676 | nqs = netif_get_num_default_rss_queues(); | |
2677 | nn->num_tx_rings = min_t(int, nqs, max_tx_rings); | |
2678 | nn->num_rx_rings = min_t(int, nqs, max_rx_rings); | |
2679 | ||
2680 | nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; | |
2681 | nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
2682 | ||
2683 | spin_lock_init(&nn->reconfig_lock); | |
66860beb | 2684 | spin_lock_init(&nn->rx_filter_lock); |
4c352362 JK |
2685 | spin_lock_init(&nn->link_status_lock); |
2686 | ||
3d780b92 JK |
2687 | setup_timer(&nn->reconfig_timer, |
2688 | nfp_net_reconfig_timer, (unsigned long)nn); | |
66860beb JK |
2689 | setup_timer(&nn->rx_filter_stats_timer, |
2690 | nfp_net_filter_stats_timer, (unsigned long)nn); | |
3d780b92 | 2691 | |
4c352362 JK |
2692 | return nn; |
2693 | } | |
2694 | ||
2695 | /** | |
2696 | * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did | |
2697 | * @nn: NFP Net device to reconfigure | |
2698 | */ | |
2699 | void nfp_net_netdev_free(struct nfp_net *nn) | |
2700 | { | |
2701 | free_netdev(nn->netdev); | |
2702 | } | |
2703 | ||
2704 | /** | |
2705 | * nfp_net_rss_init() - Set the initial RSS parameters | |
2706 | * @nn: NFP Net device to reconfigure | |
2707 | */ | |
2708 | static void nfp_net_rss_init(struct nfp_net *nn) | |
2709 | { | |
2710 | int i; | |
2711 | ||
2712 | netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); | |
2713 | ||
2714 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
2715 | nn->rss_itbl[i] = | |
2716 | ethtool_rxfh_indir_default(i, nn->num_rx_rings); | |
2717 | ||
2718 | /* Enable IPv4/IPv6 TCP by default */ | |
2719 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
2720 | NFP_NET_CFG_RSS_IPV6_TCP | | |
2721 | NFP_NET_CFG_RSS_TOEPLITZ | | |
2722 | NFP_NET_CFG_RSS_MASK; | |
2723 | } | |
2724 | ||
2725 | /** | |
2726 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
2727 | * @nn: NFP Net device to reconfigure | |
2728 | */ | |
2729 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
2730 | { | |
2731 | nn->rx_coalesce_usecs = 50; | |
2732 | nn->rx_coalesce_max_frames = 64; | |
2733 | nn->tx_coalesce_usecs = 50; | |
2734 | nn->tx_coalesce_max_frames = 64; | |
2735 | } | |
2736 | ||
2737 | /** | |
2738 | * nfp_net_netdev_init() - Initialise/finalise the netdev structure | |
2739 | * @netdev: netdev structure | |
2740 | * | |
2741 | * Return: 0 on success or negative errno on error. | |
2742 | */ | |
2743 | int nfp_net_netdev_init(struct net_device *netdev) | |
2744 | { | |
2745 | struct nfp_net *nn = netdev_priv(netdev); | |
2746 | int err; | |
2747 | ||
2748 | /* Get some of the read-only fields from the BAR */ | |
2749 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
2750 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
2751 | ||
f642963b | 2752 | nfp_net_write_mac_addr(nn); |
4c352362 | 2753 | |
bf187ea0 JK |
2754 | /* Determine RX packet/metadata boundary offset */ |
2755 | if (nn->fw_ver.major >= 2) | |
2756 | nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
2757 | else | |
2758 | nn->rx_offset = NFP_NET_RX_OFFSET; | |
2759 | ||
4c352362 JK |
2760 | /* Set default MTU and Freelist buffer size */ |
2761 | if (nn->max_mtu < NFP_NET_DEFAULT_MTU) | |
2762 | netdev->mtu = nn->max_mtu; | |
2763 | else | |
2764 | netdev->mtu = NFP_NET_DEFAULT_MTU; | |
bf187ea0 | 2765 | nn->fl_bufsz = nfp_net_calc_fl_bufsz(nn, netdev->mtu); |
4c352362 JK |
2766 | |
2767 | /* Advertise/enable offloads based on capabilities | |
2768 | * | |
2769 | * Note: netdev->features show the currently enabled features | |
2770 | * and netdev->hw_features advertises which features are | |
2771 | * supported. By default we enable most features. | |
2772 | */ | |
2773 | netdev->hw_features = NETIF_F_HIGHDMA; | |
2774 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { | |
2775 | netdev->hw_features |= NETIF_F_RXCSUM; | |
2776 | nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2777 | } | |
2778 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
2779 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
2780 | nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2781 | } | |
2782 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
2783 | netdev->hw_features |= NETIF_F_SG; | |
2784 | nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2785 | } | |
2786 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { | |
2787 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; | |
2788 | nn->ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2789 | } | |
2790 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
2791 | netdev->hw_features |= NETIF_F_RXHASH; | |
2792 | nfp_net_rss_init(nn); | |
2793 | nn->ctrl |= NFP_NET_CFG_CTRL_RSS; | |
2794 | } | |
2795 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && | |
2796 | nn->cap & NFP_NET_CFG_CTRL_NVGRE) { | |
2797 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
2798 | netdev->hw_features |= NETIF_F_GSO_GRE | | |
2799 | NETIF_F_GSO_UDP_TUNNEL; | |
2800 | nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; | |
2801 | ||
2802 | netdev->hw_enc_features = netdev->hw_features; | |
2803 | } | |
2804 | ||
2805 | netdev->vlan_features = netdev->hw_features; | |
2806 | ||
2807 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
2808 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
2809 | nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2810 | } | |
2811 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
2812 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
2813 | nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2814 | } | |
2815 | ||
2816 | netdev->features = netdev->hw_features; | |
2817 | ||
7533fdc0 JK |
2818 | if (nfp_net_ebpf_capable(nn)) |
2819 | netdev->hw_features |= NETIF_F_HW_TC; | |
2820 | ||
4c352362 JK |
2821 | /* Advertise but disable TSO by default. */ |
2822 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
2823 | ||
2824 | /* Allow L2 Broadcast and Multicast through by default, if supported */ | |
2825 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
2826 | nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; | |
2827 | if (nn->cap & NFP_NET_CFG_CTRL_L2MC) | |
2828 | nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; | |
2829 | ||
2830 | /* Allow IRQ moderation, if supported */ | |
2831 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
2832 | nfp_net_irqmod_init(nn); | |
2833 | nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
2834 | } | |
2835 | ||
4c352362 JK |
2836 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
2837 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
2838 | ||
2839 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
2840 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
2841 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2842 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2843 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
2844 | NFP_NET_CFG_UPDATE_GEN); | |
2845 | if (err) | |
2846 | return err; | |
2847 | ||
2848 | /* Finalise the netdev setup */ | |
4c352362 JK |
2849 | netdev->netdev_ops = &nfp_net_netdev_ops; |
2850 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
44770e11 JW |
2851 | |
2852 | /* MTU range: 68 - hw-specific max */ | |
2853 | netdev->min_mtu = ETH_MIN_MTU; | |
2854 | netdev->max_mtu = nn->max_mtu; | |
2855 | ||
4b402d71 | 2856 | netif_carrier_off(netdev); |
4c352362 JK |
2857 | |
2858 | nfp_net_set_ethtool_ops(netdev); | |
2859 | nfp_net_irqs_assign(netdev); | |
2860 | ||
2861 | return register_netdev(netdev); | |
2862 | } | |
2863 | ||
2864 | /** | |
2865 | * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. | |
2866 | * @netdev: netdev structure | |
2867 | */ | |
2868 | void nfp_net_netdev_clean(struct net_device *netdev) | |
2869 | { | |
2870 | unregister_netdev(netdev); | |
2871 | } |