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4c352362 JK |
1 | /* |
2 | * Copyright (C) 2015 Netronome Systems, Inc. | |
3 | * | |
4 | * This software is dual licensed under the GNU General License Version 2, | |
5 | * June 1991 as shown in the file COPYING in the top-level directory of this | |
6 | * source tree or the BSD 2-Clause License provided below. You have the | |
7 | * option to license this software under the complete terms of either license. | |
8 | * | |
9 | * The BSD 2-Clause License: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * 2. Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | /* | |
35 | * nfp_net_common.c | |
36 | * Netronome network device driver: Common functions between PF and VF | |
37 | * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> | |
38 | * Jason McMullan <jason.mcmullan@netronome.com> | |
39 | * Rolf Neugebauer <rolf.neugebauer@netronome.com> | |
40 | * Brad Petrus <brad.petrus@netronome.com> | |
41 | * Chris Telfer <chris.telfer@netronome.com> | |
42 | */ | |
43 | ||
4c352362 JK |
44 | #include <linux/module.h> |
45 | #include <linux/kernel.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/fs.h> | |
48 | #include <linux/netdevice.h> | |
49 | #include <linux/etherdevice.h> | |
50 | #include <linux/interrupt.h> | |
51 | #include <linux/ip.h> | |
52 | #include <linux/ipv6.h> | |
c0f031bc | 53 | #include <linux/page_ref.h> |
4c352362 JK |
54 | #include <linux/pci.h> |
55 | #include <linux/pci_regs.h> | |
56 | #include <linux/msi.h> | |
57 | #include <linux/ethtool.h> | |
58 | #include <linux/log2.h> | |
59 | #include <linux/if_vlan.h> | |
60 | #include <linux/random.h> | |
61 | ||
62 | #include <linux/ktime.h> | |
63 | ||
7533fdc0 | 64 | #include <net/pkt_cls.h> |
4c352362 JK |
65 | #include <net/vxlan.h> |
66 | ||
67 | #include "nfp_net_ctrl.h" | |
68 | #include "nfp_net.h" | |
69 | ||
70 | /** | |
71 | * nfp_net_get_fw_version() - Read and parse the FW version | |
72 | * @fw_ver: Output fw_version structure to read to | |
73 | * @ctrl_bar: Mapped address of the control BAR | |
74 | */ | |
75 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
76 | void __iomem *ctrl_bar) | |
77 | { | |
78 | u32 reg; | |
79 | ||
80 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
81 | put_unaligned_le32(reg, fw_ver); | |
82 | } | |
83 | ||
c0f031bc JK |
84 | static dma_addr_t |
85 | nfp_net_dma_map_rx(struct nfp_net *nn, void *frag, unsigned int bufsz, | |
86 | int direction) | |
87 | { | |
88 | return dma_map_single(&nn->pdev->dev, frag + NFP_NET_RX_BUF_HEADROOM, | |
89 | bufsz - NFP_NET_RX_BUF_NON_DATA, direction); | |
90 | } | |
91 | ||
92 | static void | |
93 | nfp_net_dma_unmap_rx(struct nfp_net *nn, dma_addr_t dma_addr, | |
94 | unsigned int bufsz, int direction) | |
95 | { | |
96 | dma_unmap_single(&nn->pdev->dev, dma_addr, | |
97 | bufsz - NFP_NET_RX_BUF_NON_DATA, direction); | |
98 | } | |
99 | ||
3d780b92 JK |
100 | /* Firmware reconfig |
101 | * | |
102 | * Firmware reconfig may take a while so we have two versions of it - | |
103 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
104 | * RTNL so we don't have to worry about serializing them. | |
105 | */ | |
106 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
107 | { | |
108 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
109 | /* ensure update is written before pinging HW */ | |
110 | nn_pci_flush(nn); | |
111 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
112 | } | |
113 | ||
114 | /* Pass 0 as update to run posted reconfigs. */ | |
115 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
116 | { | |
117 | update |= nn->reconfig_posted; | |
118 | nn->reconfig_posted = 0; | |
119 | ||
120 | nfp_net_reconfig_start(nn, update); | |
121 | ||
122 | nn->reconfig_timer_active = true; | |
123 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
124 | } | |
125 | ||
126 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
127 | { | |
128 | u32 reg; | |
129 | ||
130 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
131 | if (reg == 0) | |
132 | return true; | |
133 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
134 | nn_err(nn, "Reconfig error: 0x%08x\n", reg); | |
135 | return true; | |
136 | } else if (last_check) { | |
137 | nn_err(nn, "Reconfig timeout: 0x%08x\n", reg); | |
138 | return true; | |
139 | } | |
140 | ||
141 | return false; | |
142 | } | |
143 | ||
144 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
145 | { | |
146 | bool timed_out = false; | |
147 | ||
148 | /* Poll update field, waiting for NFP to ack the config */ | |
149 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { | |
150 | msleep(1); | |
151 | timed_out = time_is_before_eq_jiffies(deadline); | |
152 | } | |
153 | ||
154 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) | |
155 | return -EIO; | |
156 | ||
157 | return timed_out ? -EIO : 0; | |
158 | } | |
159 | ||
160 | static void nfp_net_reconfig_timer(unsigned long data) | |
161 | { | |
162 | struct nfp_net *nn = (void *)data; | |
163 | ||
164 | spin_lock_bh(&nn->reconfig_lock); | |
165 | ||
166 | nn->reconfig_timer_active = false; | |
167 | ||
168 | /* If sync caller is present it will take over from us */ | |
169 | if (nn->reconfig_sync_present) | |
170 | goto done; | |
171 | ||
172 | /* Read reconfig status and report errors */ | |
173 | nfp_net_reconfig_check_done(nn, true); | |
174 | ||
175 | if (nn->reconfig_posted) | |
176 | nfp_net_reconfig_start_async(nn, 0); | |
177 | done: | |
178 | spin_unlock_bh(&nn->reconfig_lock); | |
179 | } | |
180 | ||
181 | /** | |
182 | * nfp_net_reconfig_post() - Post async reconfig request | |
183 | * @nn: NFP Net device to reconfigure | |
184 | * @update: The value for the update field in the BAR config | |
185 | * | |
186 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
187 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
188 | * merged together! | |
189 | */ | |
190 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
191 | { | |
192 | spin_lock_bh(&nn->reconfig_lock); | |
193 | ||
194 | /* Sync caller will kick off async reconf when it's done, just post */ | |
195 | if (nn->reconfig_sync_present) { | |
196 | nn->reconfig_posted |= update; | |
197 | goto done; | |
198 | } | |
199 | ||
200 | /* Opportunistically check if the previous command is done */ | |
201 | if (!nn->reconfig_timer_active || | |
202 | nfp_net_reconfig_check_done(nn, false)) | |
203 | nfp_net_reconfig_start_async(nn, update); | |
204 | else | |
205 | nn->reconfig_posted |= update; | |
206 | done: | |
207 | spin_unlock_bh(&nn->reconfig_lock); | |
208 | } | |
209 | ||
4c352362 JK |
210 | /** |
211 | * nfp_net_reconfig() - Reconfigure the firmware | |
212 | * @nn: NFP Net device to reconfigure | |
213 | * @update: The value for the update field in the BAR config | |
214 | * | |
215 | * Write the update word to the BAR and ping the reconfig queue. The | |
216 | * poll until the firmware has acknowledged the update by zeroing the | |
217 | * update word. | |
218 | * | |
219 | * Return: Negative errno on error, 0 on success | |
220 | */ | |
221 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) | |
222 | { | |
3d780b92 JK |
223 | bool cancelled_timer = false; |
224 | u32 pre_posted_requests; | |
225 | int ret; | |
4c352362 JK |
226 | |
227 | spin_lock_bh(&nn->reconfig_lock); | |
228 | ||
3d780b92 | 229 | nn->reconfig_sync_present = true; |
4c352362 | 230 | |
3d780b92 JK |
231 | if (nn->reconfig_timer_active) { |
232 | del_timer(&nn->reconfig_timer); | |
233 | nn->reconfig_timer_active = false; | |
234 | cancelled_timer = true; | |
235 | } | |
236 | pre_posted_requests = nn->reconfig_posted; | |
237 | nn->reconfig_posted = 0; | |
238 | ||
239 | spin_unlock_bh(&nn->reconfig_lock); | |
240 | ||
241 | if (cancelled_timer) | |
242 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); | |
243 | ||
244 | /* Run the posted reconfigs which were issued before we started */ | |
245 | if (pre_posted_requests) { | |
246 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
247 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 JK |
248 | } |
249 | ||
3d780b92 JK |
250 | nfp_net_reconfig_start(nn, update); |
251 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
252 | ||
253 | spin_lock_bh(&nn->reconfig_lock); | |
254 | ||
255 | if (nn->reconfig_posted) | |
256 | nfp_net_reconfig_start_async(nn, 0); | |
257 | ||
258 | nn->reconfig_sync_present = false; | |
259 | ||
4c352362 | 260 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 261 | |
4c352362 JK |
262 | return ret; |
263 | } | |
264 | ||
265 | /* Interrupt configuration and handling | |
266 | */ | |
267 | ||
4c352362 JK |
268 | /** |
269 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
270 | * @nn: NFP Network structure | |
271 | * @entry_nr: MSI-X table entry | |
272 | * | |
416db5c1 | 273 | * Clear the ICR for the IRQ entry. |
4c352362 JK |
274 | */ |
275 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
276 | { | |
4c352362 JK |
277 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); |
278 | nn_pci_flush(nn); | |
279 | } | |
280 | ||
281 | /** | |
282 | * nfp_net_msix_alloc() - Try to allocate MSI-X irqs | |
283 | * @nn: NFP Network structure | |
284 | * @nr_vecs: Number of MSI-X vectors to allocate | |
285 | * | |
286 | * For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors. | |
287 | * | |
288 | * Return: Number of MSI-X vectors obtained or 0 on error. | |
289 | */ | |
290 | static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs) | |
291 | { | |
292 | struct pci_dev *pdev = nn->pdev; | |
293 | int nvecs; | |
294 | int i; | |
295 | ||
296 | for (i = 0; i < nr_vecs; i++) | |
297 | nn->irq_entries[i].entry = i; | |
298 | ||
299 | nvecs = pci_enable_msix_range(pdev, nn->irq_entries, | |
300 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs); | |
301 | if (nvecs < 0) { | |
302 | nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n", | |
303 | NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | return nvecs; | |
308 | } | |
309 | ||
4c352362 JK |
310 | /** |
311 | * nfp_net_irqs_alloc() - allocates MSI-X irqs | |
312 | * @nn: NFP Network structure | |
313 | * | |
314 | * Return: Number of irqs obtained or 0 on error. | |
315 | */ | |
316 | int nfp_net_irqs_alloc(struct nfp_net *nn) | |
317 | { | |
318 | int wanted_irqs; | |
b33ae997 | 319 | unsigned int n; |
4c352362 | 320 | |
4b27a1eb | 321 | wanted_irqs = nn->num_r_vecs + NFP_NET_NON_Q_VECTORS; |
4c352362 | 322 | |
b33ae997 JK |
323 | n = nfp_net_msix_alloc(nn, wanted_irqs); |
324 | if (n == 0) { | |
4c352362 JK |
325 | nn_err(nn, "Failed to allocate MSI-X IRQs\n"); |
326 | return 0; | |
327 | } | |
328 | ||
b33ae997 JK |
329 | nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS; |
330 | nn->num_r_vecs = nn->max_r_vecs; | |
4c352362 | 331 | |
b33ae997 | 332 | if (n < wanted_irqs) |
4c352362 | 333 | nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n", |
b33ae997 | 334 | wanted_irqs, n); |
4c352362 | 335 | |
b33ae997 | 336 | return n; |
4c352362 JK |
337 | } |
338 | ||
339 | /** | |
340 | * nfp_net_irqs_disable() - Disable interrupts | |
341 | * @nn: NFP Network structure | |
342 | * | |
343 | * Undoes what @nfp_net_irqs_alloc() does. | |
344 | */ | |
345 | void nfp_net_irqs_disable(struct nfp_net *nn) | |
346 | { | |
347 | pci_disable_msix(nn->pdev); | |
348 | } | |
349 | ||
350 | /** | |
351 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
352 | * @irq: Interrupt | |
353 | * @data: Opaque data structure | |
354 | * | |
355 | * Return: Indicate if the interrupt has been handled. | |
356 | */ | |
357 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
358 | { | |
359 | struct nfp_net_r_vector *r_vec = data; | |
360 | ||
361 | napi_schedule_irqoff(&r_vec->napi); | |
362 | ||
363 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
364 | * the MSI-X table or via the per entry ICR field. So there | |
365 | * is no need to disable interrupts here. | |
366 | */ | |
367 | return IRQ_HANDLED; | |
368 | } | |
369 | ||
370 | /** | |
371 | * nfp_net_read_link_status() - Reread link status from control BAR | |
372 | * @nn: NFP Network structure | |
373 | */ | |
374 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
375 | { | |
376 | unsigned long flags; | |
377 | bool link_up; | |
378 | u32 sts; | |
379 | ||
380 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
381 | ||
382 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
383 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
384 | ||
385 | if (nn->link_up == link_up) | |
386 | goto out; | |
387 | ||
388 | nn->link_up = link_up; | |
389 | ||
390 | if (nn->link_up) { | |
391 | netif_carrier_on(nn->netdev); | |
392 | netdev_info(nn->netdev, "NIC Link is Up\n"); | |
393 | } else { | |
394 | netif_carrier_off(nn->netdev); | |
395 | netdev_info(nn->netdev, "NIC Link is Down\n"); | |
396 | } | |
397 | out: | |
398 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
399 | } | |
400 | ||
401 | /** | |
402 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
403 | * @irq: Interrupt | |
404 | * @data: Opaque data structure | |
405 | * | |
406 | * Return: Indicate if the interrupt has been handled. | |
407 | */ | |
408 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
409 | { | |
410 | struct nfp_net *nn = data; | |
411 | ||
412 | nfp_net_read_link_status(nn); | |
413 | ||
414 | nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX); | |
415 | ||
416 | return IRQ_HANDLED; | |
417 | } | |
418 | ||
419 | /** | |
420 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
421 | * @irq: Interrupt | |
422 | * @data: Opaque data structure | |
423 | * | |
424 | * Return: Indicate if the interrupt has been handled. | |
425 | */ | |
426 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
427 | { | |
428 | struct nfp_net *nn = data; | |
429 | ||
430 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
431 | /* XXX TO BE IMPLEMENTED */ | |
432 | return IRQ_HANDLED; | |
433 | } | |
434 | ||
435 | /** | |
436 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
437 | * @tx_ring: TX ring structure | |
d79737c2 JK |
438 | * @r_vec: IRQ vector servicing this ring |
439 | * @idx: Ring index | |
4c352362 | 440 | */ |
d79737c2 JK |
441 | static void |
442 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
443 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 444 | { |
4c352362 JK |
445 | struct nfp_net *nn = r_vec->nfp_net; |
446 | ||
d79737c2 JK |
447 | tx_ring->idx = idx; |
448 | tx_ring->r_vec = r_vec; | |
449 | ||
4c352362 JK |
450 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
451 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
452 | } | |
453 | ||
454 | /** | |
455 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
456 | * @rx_ring: RX ring structure | |
d79737c2 JK |
457 | * @r_vec: IRQ vector servicing this ring |
458 | * @idx: Ring index | |
4c352362 | 459 | */ |
d79737c2 JK |
460 | static void |
461 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
462 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 463 | { |
4c352362 JK |
464 | struct nfp_net *nn = r_vec->nfp_net; |
465 | ||
d79737c2 JK |
466 | rx_ring->idx = idx; |
467 | rx_ring->r_vec = r_vec; | |
468 | ||
4c352362 JK |
469 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
470 | rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1); | |
471 | ||
472 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); | |
473 | rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx); | |
474 | } | |
475 | ||
476 | /** | |
477 | * nfp_net_irqs_assign() - Assign IRQs and setup rvecs. | |
478 | * @netdev: netdev structure | |
479 | */ | |
480 | static void nfp_net_irqs_assign(struct net_device *netdev) | |
481 | { | |
482 | struct nfp_net *nn = netdev_priv(netdev); | |
483 | struct nfp_net_r_vector *r_vec; | |
484 | int r; | |
485 | ||
cbeaf7aa JK |
486 | if (nn->num_rx_rings > nn->num_r_vecs || |
487 | nn->num_tx_rings > nn->num_r_vecs) | |
488 | nn_warn(nn, "More rings (%d,%d) than vectors (%d).\n", | |
489 | nn->num_rx_rings, nn->num_tx_rings, nn->num_r_vecs); | |
490 | ||
491 | nn->num_rx_rings = min(nn->num_r_vecs, nn->num_rx_rings); | |
492 | nn->num_tx_rings = min(nn->num_r_vecs, nn->num_tx_rings); | |
4c352362 JK |
493 | |
494 | nn->lsc_handler = nfp_net_irq_lsc; | |
495 | nn->exn_handler = nfp_net_irq_exn; | |
496 | ||
164d1e9e | 497 | for (r = 0; r < nn->max_r_vecs; r++) { |
4c352362 JK |
498 | r_vec = &nn->r_vecs[r]; |
499 | r_vec->nfp_net = nn; | |
500 | r_vec->handler = nfp_net_irq_rxtx; | |
501 | r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r; | |
502 | ||
503 | cpumask_set_cpu(r, &r_vec->affinity_mask); | |
4c352362 JK |
504 | } |
505 | } | |
506 | ||
507 | /** | |
508 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
509 | * @nn: NFP Network structure | |
510 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
511 | * @format: printf-style format to construct the interrupt name | |
512 | * @name: Pointer to allocated space for interrupt name | |
513 | * @name_sz: Size of space for interrupt name | |
514 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
515 | * @handler: IRQ handler to register for this interrupt | |
516 | */ | |
517 | static int | |
518 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
519 | const char *format, char *name, size_t name_sz, | |
520 | unsigned int vector_idx, irq_handler_t handler) | |
521 | { | |
522 | struct msix_entry *entry; | |
523 | int err; | |
524 | ||
525 | entry = &nn->irq_entries[vector_idx]; | |
526 | ||
527 | snprintf(name, name_sz, format, netdev_name(nn->netdev)); | |
528 | err = request_irq(entry->vector, handler, 0, name, nn); | |
529 | if (err) { | |
530 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
531 | entry->vector, err); | |
532 | return err; | |
533 | } | |
534 | nn_writeb(nn, ctrl_offset, vector_idx); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | /** | |
540 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
541 | * @nn: NFP Network structure | |
542 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
543 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
544 | */ | |
545 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
546 | unsigned int vector_idx) | |
547 | { | |
548 | nn_writeb(nn, ctrl_offset, 0xff); | |
549 | free_irq(nn->irq_entries[vector_idx].vector, nn); | |
550 | } | |
551 | ||
552 | /* Transmit | |
553 | * | |
554 | * One queue controller peripheral queue is used for transmit. The | |
555 | * driver en-queues packets for transmit by advancing the write | |
556 | * pointer. The device indicates that packets have transmitted by | |
557 | * advancing the read pointer. The driver maintains a local copy of | |
558 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
559 | * keeps @wr_p in sync with the queue controller write pointer and can | |
560 | * determine how many packets have been transmitted by comparing its | |
561 | * copy of the read pointer @rd_p with the read pointer maintained by | |
562 | * the queue controller peripheral. | |
563 | */ | |
564 | ||
565 | /** | |
566 | * nfp_net_tx_full() - Check if the TX ring is full | |
567 | * @tx_ring: TX ring to check | |
568 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
569 | * | |
570 | * This function checks, based on the *host copy* of read/write | |
571 | * pointer if a given TX ring is full. The real TX queue may have | |
572 | * some newly made available slots. | |
573 | * | |
574 | * Return: True if the ring is full. | |
575 | */ | |
fa95f1d2 | 576 | static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) |
4c352362 JK |
577 | { |
578 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
579 | } | |
580 | ||
581 | /* Wrappers for deciding when to stop and restart TX queues */ | |
582 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
583 | { | |
584 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
585 | } | |
586 | ||
587 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
588 | { | |
589 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
590 | } | |
591 | ||
592 | /** | |
593 | * nfp_net_tx_ring_stop() - stop tx ring | |
594 | * @nd_q: netdev queue | |
595 | * @tx_ring: driver tx queue structure | |
596 | * | |
597 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
598 | * someone else may be cleaning the TX ring completions so we need to be | |
599 | * extra careful here. | |
600 | */ | |
601 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
602 | struct nfp_net_tx_ring *tx_ring) | |
603 | { | |
604 | netif_tx_stop_queue(nd_q); | |
605 | ||
606 | /* We can race with the TX completion out of NAPI so recheck */ | |
607 | smp_mb(); | |
608 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
609 | netif_tx_start_queue(nd_q); | |
610 | } | |
611 | ||
612 | /** | |
613 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
614 | * @nn: NFP Net device | |
615 | * @r_vec: per-ring structure | |
616 | * @txbuf: Pointer to driver soft TX descriptor | |
617 | * @txd: Pointer to HW TX descriptor | |
618 | * @skb: Pointer to SKB | |
619 | * | |
620 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
621 | * Return error on packet header greater than maximum supported LSO header size. | |
622 | */ | |
623 | static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
624 | struct nfp_net_tx_buf *txbuf, | |
625 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
626 | { | |
627 | u32 hdrlen; | |
628 | u16 mss; | |
629 | ||
630 | if (!skb_is_gso(skb)) | |
631 | return; | |
632 | ||
633 | if (!skb->encapsulation) | |
634 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
635 | else | |
636 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
637 | inner_tcp_hdrlen(skb); | |
638 | ||
639 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
640 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
641 | ||
642 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
643 | txd->l4_offset = hdrlen; | |
644 | txd->mss = cpu_to_le16(mss); | |
645 | txd->flags |= PCIE_DESC_TX_LSO; | |
646 | ||
647 | u64_stats_update_begin(&r_vec->tx_sync); | |
648 | r_vec->tx_lso++; | |
649 | u64_stats_update_end(&r_vec->tx_sync); | |
650 | } | |
651 | ||
652 | /** | |
653 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
654 | * @nn: NFP Net device | |
655 | * @r_vec: per-ring structure | |
656 | * @txbuf: Pointer to driver soft TX descriptor | |
657 | * @txd: Pointer to TX descriptor | |
658 | * @skb: Pointer to SKB | |
659 | * | |
660 | * This function sets the TX checksum flags in the TX descriptor based | |
661 | * on the configuration and the protocol of the packet to be transmitted. | |
662 | */ | |
663 | static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
664 | struct nfp_net_tx_buf *txbuf, | |
665 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
666 | { | |
667 | struct ipv6hdr *ipv6h; | |
668 | struct iphdr *iph; | |
669 | u8 l4_hdr; | |
670 | ||
671 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) | |
672 | return; | |
673 | ||
674 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
675 | return; | |
676 | ||
677 | txd->flags |= PCIE_DESC_TX_CSUM; | |
678 | if (skb->encapsulation) | |
679 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
680 | ||
681 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
682 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
683 | ||
684 | if (iph->version == 4) { | |
685 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
686 | l4_hdr = iph->protocol; | |
687 | } else if (ipv6h->version == 6) { | |
688 | l4_hdr = ipv6h->nexthdr; | |
689 | } else { | |
690 | nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n", | |
691 | iph->version); | |
692 | return; | |
693 | } | |
694 | ||
695 | switch (l4_hdr) { | |
696 | case IPPROTO_TCP: | |
697 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
698 | break; | |
699 | case IPPROTO_UDP: | |
700 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
701 | break; | |
702 | default: | |
703 | nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n", | |
704 | l4_hdr); | |
705 | return; | |
706 | } | |
707 | ||
708 | u64_stats_update_begin(&r_vec->tx_sync); | |
709 | if (skb->encapsulation) | |
710 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
711 | else | |
712 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
713 | u64_stats_update_end(&r_vec->tx_sync); | |
714 | } | |
715 | ||
716 | /** | |
717 | * nfp_net_tx() - Main transmit entry point | |
718 | * @skb: SKB to transmit | |
719 | * @netdev: netdev structure | |
720 | * | |
721 | * Return: NETDEV_TX_OK on success. | |
722 | */ | |
723 | static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) | |
724 | { | |
725 | struct nfp_net *nn = netdev_priv(netdev); | |
726 | const struct skb_frag_struct *frag; | |
727 | struct nfp_net_r_vector *r_vec; | |
728 | struct nfp_net_tx_desc *txd, txdg; | |
729 | struct nfp_net_tx_buf *txbuf; | |
730 | struct nfp_net_tx_ring *tx_ring; | |
731 | struct netdev_queue *nd_q; | |
732 | dma_addr_t dma_addr; | |
733 | unsigned int fsize; | |
734 | int f, nr_frags; | |
735 | int wr_idx; | |
736 | u16 qidx; | |
737 | ||
738 | qidx = skb_get_queue_mapping(skb); | |
739 | tx_ring = &nn->tx_rings[qidx]; | |
740 | r_vec = tx_ring->r_vec; | |
741 | nd_q = netdev_get_tx_queue(nn->netdev, qidx); | |
742 | ||
743 | nr_frags = skb_shinfo(skb)->nr_frags; | |
744 | ||
745 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
746 | nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n", | |
747 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
748 | netif_tx_stop_queue(nd_q); | |
749 | u64_stats_update_begin(&r_vec->tx_sync); | |
750 | r_vec->tx_busy++; | |
751 | u64_stats_update_end(&r_vec->tx_sync); | |
752 | return NETDEV_TX_BUSY; | |
753 | } | |
754 | ||
755 | /* Start with the head skbuf */ | |
756 | dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb), | |
757 | DMA_TO_DEVICE); | |
758 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
759 | goto err_free; | |
760 | ||
1a1d74d3 | 761 | wr_idx = tx_ring->wr_p & (tx_ring->cnt - 1); |
4c352362 JK |
762 | |
763 | /* Stash the soft descriptor of the head then initialize it */ | |
764 | txbuf = &tx_ring->txbufs[wr_idx]; | |
765 | txbuf->skb = skb; | |
766 | txbuf->dma_addr = dma_addr; | |
767 | txbuf->fidx = -1; | |
768 | txbuf->pkt_cnt = 1; | |
769 | txbuf->real_len = skb->len; | |
770 | ||
771 | /* Build TX descriptor */ | |
772 | txd = &tx_ring->txds[wr_idx]; | |
773 | txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; | |
774 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
775 | nfp_desc_set_dma_addr(txd, dma_addr); | |
776 | txd->data_len = cpu_to_le16(skb->len); | |
777 | ||
778 | txd->flags = 0; | |
779 | txd->mss = 0; | |
780 | txd->l4_offset = 0; | |
781 | ||
782 | nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb); | |
783 | ||
784 | nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb); | |
785 | ||
786 | if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { | |
787 | txd->flags |= PCIE_DESC_TX_VLAN; | |
788 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
789 | } | |
790 | ||
791 | /* Gather DMA */ | |
792 | if (nr_frags > 0) { | |
793 | /* all descs must match except for in addr, length and eop */ | |
794 | txdg = *txd; | |
795 | ||
796 | for (f = 0; f < nr_frags; f++) { | |
797 | frag = &skb_shinfo(skb)->frags[f]; | |
798 | fsize = skb_frag_size(frag); | |
799 | ||
800 | dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0, | |
801 | fsize, DMA_TO_DEVICE); | |
802 | if (dma_mapping_error(&nn->pdev->dev, dma_addr)) | |
803 | goto err_unmap; | |
804 | ||
1a1d74d3 | 805 | wr_idx = (wr_idx + 1) & (tx_ring->cnt - 1); |
4c352362 JK |
806 | tx_ring->txbufs[wr_idx].skb = skb; |
807 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
808 | tx_ring->txbufs[wr_idx].fidx = f; | |
809 | ||
810 | txd = &tx_ring->txds[wr_idx]; | |
811 | *txd = txdg; | |
812 | txd->dma_len = cpu_to_le16(fsize); | |
813 | nfp_desc_set_dma_addr(txd, dma_addr); | |
814 | txd->offset_eop = | |
815 | (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; | |
816 | } | |
817 | ||
818 | u64_stats_update_begin(&r_vec->tx_sync); | |
819 | r_vec->tx_gather++; | |
820 | u64_stats_update_end(&r_vec->tx_sync); | |
821 | } | |
822 | ||
823 | netdev_tx_sent_queue(nd_q, txbuf->real_len); | |
824 | ||
825 | tx_ring->wr_p += nr_frags + 1; | |
826 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
827 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
828 | ||
829 | tx_ring->wr_ptr_add += nr_frags + 1; | |
830 | if (!skb->xmit_more || netif_xmit_stopped(nd_q)) { | |
831 | /* force memory write before we let HW know */ | |
832 | wmb(); | |
833 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
834 | tx_ring->wr_ptr_add = 0; | |
835 | } | |
836 | ||
837 | skb_tx_timestamp(skb); | |
838 | ||
839 | return NETDEV_TX_OK; | |
840 | ||
841 | err_unmap: | |
842 | --f; | |
843 | while (f >= 0) { | |
844 | frag = &skb_shinfo(skb)->frags[f]; | |
845 | dma_unmap_page(&nn->pdev->dev, | |
846 | tx_ring->txbufs[wr_idx].dma_addr, | |
847 | skb_frag_size(frag), DMA_TO_DEVICE); | |
848 | tx_ring->txbufs[wr_idx].skb = NULL; | |
849 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
850 | tx_ring->txbufs[wr_idx].fidx = -2; | |
851 | wr_idx = wr_idx - 1; | |
852 | if (wr_idx < 0) | |
853 | wr_idx += tx_ring->cnt; | |
854 | } | |
855 | dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr, | |
856 | skb_headlen(skb), DMA_TO_DEVICE); | |
857 | tx_ring->txbufs[wr_idx].skb = NULL; | |
858 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
859 | tx_ring->txbufs[wr_idx].fidx = -2; | |
860 | err_free: | |
861 | nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n"); | |
862 | u64_stats_update_begin(&r_vec->tx_sync); | |
863 | r_vec->tx_errors++; | |
864 | u64_stats_update_end(&r_vec->tx_sync); | |
865 | dev_kfree_skb_any(skb); | |
866 | return NETDEV_TX_OK; | |
867 | } | |
868 | ||
869 | /** | |
870 | * nfp_net_tx_complete() - Handled completed TX packets | |
871 | * @tx_ring: TX ring structure | |
872 | * | |
873 | * Return: Number of completed TX descriptors | |
874 | */ | |
875 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) | |
876 | { | |
877 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
878 | struct nfp_net *nn = r_vec->nfp_net; | |
879 | const struct skb_frag_struct *frag; | |
880 | struct netdev_queue *nd_q; | |
881 | u32 done_pkts = 0, done_bytes = 0; | |
882 | struct sk_buff *skb; | |
883 | int todo, nr_frags; | |
884 | u32 qcp_rd_p; | |
885 | int fidx; | |
886 | int idx; | |
887 | ||
888 | /* Work out how many descriptors have been transmitted */ | |
889 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
890 | ||
891 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
892 | return; | |
893 | ||
894 | if (qcp_rd_p > tx_ring->qcp_rd_p) | |
895 | todo = qcp_rd_p - tx_ring->qcp_rd_p; | |
896 | else | |
897 | todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p; | |
898 | ||
899 | while (todo--) { | |
1a1d74d3 | 900 | idx = tx_ring->rd_p & (tx_ring->cnt - 1); |
4c352362 JK |
901 | tx_ring->rd_p++; |
902 | ||
903 | skb = tx_ring->txbufs[idx].skb; | |
904 | if (!skb) | |
905 | continue; | |
906 | ||
907 | nr_frags = skb_shinfo(skb)->nr_frags; | |
908 | fidx = tx_ring->txbufs[idx].fidx; | |
909 | ||
910 | if (fidx == -1) { | |
911 | /* unmap head */ | |
912 | dma_unmap_single(&nn->pdev->dev, | |
913 | tx_ring->txbufs[idx].dma_addr, | |
914 | skb_headlen(skb), DMA_TO_DEVICE); | |
915 | ||
916 | done_pkts += tx_ring->txbufs[idx].pkt_cnt; | |
917 | done_bytes += tx_ring->txbufs[idx].real_len; | |
918 | } else { | |
919 | /* unmap fragment */ | |
920 | frag = &skb_shinfo(skb)->frags[fidx]; | |
921 | dma_unmap_page(&nn->pdev->dev, | |
922 | tx_ring->txbufs[idx].dma_addr, | |
923 | skb_frag_size(frag), DMA_TO_DEVICE); | |
924 | } | |
925 | ||
926 | /* check for last gather fragment */ | |
927 | if (fidx == nr_frags - 1) | |
928 | dev_kfree_skb_any(skb); | |
929 | ||
930 | tx_ring->txbufs[idx].dma_addr = 0; | |
931 | tx_ring->txbufs[idx].skb = NULL; | |
932 | tx_ring->txbufs[idx].fidx = -2; | |
933 | } | |
934 | ||
935 | tx_ring->qcp_rd_p = qcp_rd_p; | |
936 | ||
937 | u64_stats_update_begin(&r_vec->tx_sync); | |
938 | r_vec->tx_bytes += done_bytes; | |
939 | r_vec->tx_pkts += done_pkts; | |
940 | u64_stats_update_end(&r_vec->tx_sync); | |
941 | ||
942 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); | |
943 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); | |
944 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
945 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
946 | smp_mb(); | |
947 | ||
948 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
949 | netif_tx_wake_queue(nd_q); | |
950 | } | |
951 | ||
952 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
953 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
954 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
955 | } | |
956 | ||
957 | /** | |
827deea9 JK |
958 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
959 | * @nn: NFP Net device | |
960 | * @tx_ring: TX ring structure | |
4c352362 JK |
961 | * |
962 | * Assumes that the device is stopped | |
963 | */ | |
827deea9 JK |
964 | static void |
965 | nfp_net_tx_ring_reset(struct nfp_net *nn, struct nfp_net_tx_ring *tx_ring) | |
4c352362 | 966 | { |
4c352362 JK |
967 | const struct skb_frag_struct *frag; |
968 | struct netdev_queue *nd_q; | |
827deea9 | 969 | struct pci_dev *pdev = nn->pdev; |
4c352362 JK |
970 | |
971 | while (tx_ring->rd_p != tx_ring->wr_p) { | |
827deea9 JK |
972 | int nr_frags, fidx, idx; |
973 | struct sk_buff *skb; | |
4c352362 | 974 | |
1a1d74d3 | 975 | idx = tx_ring->rd_p & (tx_ring->cnt - 1); |
4c352362 | 976 | skb = tx_ring->txbufs[idx].skb; |
827deea9 JK |
977 | nr_frags = skb_shinfo(skb)->nr_frags; |
978 | fidx = tx_ring->txbufs[idx].fidx; | |
979 | ||
980 | if (fidx == -1) { | |
981 | /* unmap head */ | |
982 | dma_unmap_single(&pdev->dev, | |
983 | tx_ring->txbufs[idx].dma_addr, | |
984 | skb_headlen(skb), DMA_TO_DEVICE); | |
985 | } else { | |
986 | /* unmap fragment */ | |
987 | frag = &skb_shinfo(skb)->frags[fidx]; | |
988 | dma_unmap_page(&pdev->dev, | |
989 | tx_ring->txbufs[idx].dma_addr, | |
990 | skb_frag_size(frag), DMA_TO_DEVICE); | |
4c352362 JK |
991 | } |
992 | ||
827deea9 JK |
993 | /* check for last gather fragment */ |
994 | if (fidx == nr_frags - 1) | |
995 | dev_kfree_skb_any(skb); | |
996 | ||
997 | tx_ring->txbufs[idx].dma_addr = 0; | |
998 | tx_ring->txbufs[idx].skb = NULL; | |
999 | tx_ring->txbufs[idx].fidx = -2; | |
4c352362 JK |
1000 | |
1001 | tx_ring->qcp_rd_p++; | |
1002 | tx_ring->rd_p++; | |
1003 | } | |
1004 | ||
827deea9 JK |
1005 | memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt); |
1006 | tx_ring->wr_p = 0; | |
1007 | tx_ring->rd_p = 0; | |
1008 | tx_ring->qcp_rd_p = 0; | |
1009 | tx_ring->wr_ptr_add = 0; | |
1010 | ||
4c352362 JK |
1011 | nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx); |
1012 | netdev_tx_reset_queue(nd_q); | |
1013 | } | |
1014 | ||
1015 | static void nfp_net_tx_timeout(struct net_device *netdev) | |
1016 | { | |
1017 | struct nfp_net *nn = netdev_priv(netdev); | |
1018 | int i; | |
1019 | ||
1020 | for (i = 0; i < nn->num_tx_rings; i++) { | |
1021 | if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) | |
1022 | continue; | |
1023 | nn_warn(nn, "TX timeout on ring: %d\n", i); | |
1024 | } | |
1025 | nn_warn(nn, "TX watchdog timeout\n"); | |
1026 | } | |
1027 | ||
1028 | /* Receive processing | |
1029 | */ | |
bf187ea0 JK |
1030 | static unsigned int |
1031 | nfp_net_calc_fl_bufsz(struct nfp_net *nn, unsigned int mtu) | |
1032 | { | |
1033 | unsigned int fl_bufsz; | |
1034 | ||
c0f031bc | 1035 | fl_bufsz = NFP_NET_RX_BUF_HEADROOM; |
bf187ea0 | 1036 | if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
c0f031bc | 1037 | fl_bufsz += NFP_NET_MAX_PREPEND; |
bf187ea0 | 1038 | else |
c0f031bc | 1039 | fl_bufsz += nn->rx_offset; |
bf187ea0 JK |
1040 | fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + mtu; |
1041 | ||
c0f031bc JK |
1042 | fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); |
1043 | fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
1044 | ||
bf187ea0 JK |
1045 | return fl_bufsz; |
1046 | } | |
4c352362 | 1047 | |
4c352362 | 1048 | /** |
c0f031bc | 1049 | * nfp_net_rx_alloc_one() - Allocate and map page frag for RX |
4c352362 JK |
1050 | * @rx_ring: RX ring structure of the skb |
1051 | * @dma_addr: Pointer to storage for DMA address (output param) | |
30d21171 | 1052 | * @fl_bufsz: size of freelist buffers |
4c352362 | 1053 | * |
c0f031bc | 1054 | * This function will allcate a new page frag, map it for DMA. |
4c352362 | 1055 | * |
c0f031bc | 1056 | * Return: allocated page frag or NULL on failure. |
4c352362 | 1057 | */ |
c0f031bc | 1058 | static void * |
30d21171 JK |
1059 | nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr, |
1060 | unsigned int fl_bufsz) | |
4c352362 JK |
1061 | { |
1062 | struct nfp_net *nn = rx_ring->r_vec->nfp_net; | |
c0f031bc | 1063 | void *frag; |
4c352362 | 1064 | |
c0f031bc JK |
1065 | frag = netdev_alloc_frag(fl_bufsz); |
1066 | if (!frag) { | |
1067 | nn_warn_ratelimit(nn, "Failed to alloc receive page frag\n"); | |
4c352362 JK |
1068 | return NULL; |
1069 | } | |
1070 | ||
c0f031bc | 1071 | *dma_addr = nfp_net_dma_map_rx(nn, frag, fl_bufsz, DMA_FROM_DEVICE); |
4c352362 | 1072 | if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { |
c0f031bc | 1073 | skb_free_frag(frag); |
4c352362 JK |
1074 | nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); |
1075 | return NULL; | |
1076 | } | |
1077 | ||
c0f031bc | 1078 | return frag; |
4c352362 JK |
1079 | } |
1080 | ||
b64b7bb6 JK |
1081 | static void *nfp_net_napi_alloc_one(struct nfp_net *nn, dma_addr_t *dma_addr) |
1082 | { | |
1083 | void *frag; | |
1084 | ||
1085 | frag = napi_alloc_frag(nn->fl_bufsz); | |
1086 | if (!frag) { | |
1087 | nn_warn_ratelimit(nn, "Failed to alloc receive page frag\n"); | |
1088 | return NULL; | |
1089 | } | |
1090 | ||
1091 | *dma_addr = nfp_net_dma_map_rx(nn, frag, nn->fl_bufsz, DMA_FROM_DEVICE); | |
1092 | if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) { | |
1093 | skb_free_frag(frag); | |
1094 | nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n"); | |
1095 | return NULL; | |
1096 | } | |
1097 | ||
1098 | return frag; | |
1099 | } | |
1100 | ||
4c352362 JK |
1101 | /** |
1102 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
1103 | * @rx_ring: RX ring structure | |
c0f031bc | 1104 | * @frag: page fragment buffer |
4c352362 JK |
1105 | * @dma_addr: DMA address of skb mapping |
1106 | */ | |
1107 | static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring, | |
c0f031bc | 1108 | void *frag, dma_addr_t dma_addr) |
4c352362 JK |
1109 | { |
1110 | unsigned int wr_idx; | |
1111 | ||
1a1d74d3 | 1112 | wr_idx = rx_ring->wr_p & (rx_ring->cnt - 1); |
4c352362 JK |
1113 | |
1114 | /* Stash SKB and DMA address away */ | |
c0f031bc | 1115 | rx_ring->rxbufs[wr_idx].frag = frag; |
4c352362 JK |
1116 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; |
1117 | ||
1118 | /* Fill freelist descriptor */ | |
1119 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1120 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
1121 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr); | |
1122 | ||
1123 | rx_ring->wr_p++; | |
1124 | rx_ring->wr_ptr_add++; | |
1125 | if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) { | |
1126 | /* Update write pointer of the freelist queue. Make | |
1127 | * sure all writes are flushed before telling the hardware. | |
1128 | */ | |
1129 | wmb(); | |
1130 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add); | |
1131 | rx_ring->wr_ptr_add = 0; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | /** | |
1934680f JK |
1136 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1137 | * @rx_ring: RX ring structure | |
4c352362 | 1138 | * |
1934680f JK |
1139 | * Warning: Do *not* call if ring buffers were never put on the FW freelist |
1140 | * (i.e. device was not enabled)! | |
4c352362 | 1141 | */ |
1934680f | 1142 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1143 | { |
1934680f | 1144 | unsigned int wr_idx, last_idx; |
4c352362 | 1145 | |
1934680f | 1146 | /* Move the empty entry to the end of the list */ |
1a1d74d3 | 1147 | wr_idx = rx_ring->wr_p & (rx_ring->cnt - 1); |
1934680f JK |
1148 | last_idx = rx_ring->cnt - 1; |
1149 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
c0f031bc | 1150 | rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag; |
1934680f | 1151 | rx_ring->rxbufs[last_idx].dma_addr = 0; |
c0f031bc | 1152 | rx_ring->rxbufs[last_idx].frag = NULL; |
4c352362 | 1153 | |
1934680f JK |
1154 | memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt); |
1155 | rx_ring->wr_p = 0; | |
1156 | rx_ring->rd_p = 0; | |
1157 | rx_ring->wr_ptr_add = 0; | |
1158 | } | |
4c352362 | 1159 | |
1934680f JK |
1160 | /** |
1161 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
1162 | * @nn: NFP Net device | |
1163 | * @rx_ring: RX ring to remove buffers from | |
1164 | * | |
1165 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1166 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1167 | * to restore required ring geometry. | |
1168 | */ | |
1169 | static void | |
1170 | nfp_net_rx_ring_bufs_free(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
1171 | { | |
1934680f | 1172 | unsigned int i; |
4c352362 | 1173 | |
1934680f JK |
1174 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1175 | /* NULL skb can only happen when initial filling of the ring | |
1176 | * fails to allocate enough buffers and calls here to free | |
1177 | * already allocated ones. | |
1178 | */ | |
c0f031bc | 1179 | if (!rx_ring->rxbufs[i].frag) |
1934680f JK |
1180 | continue; |
1181 | ||
c0f031bc JK |
1182 | nfp_net_dma_unmap_rx(nn, rx_ring->rxbufs[i].dma_addr, |
1183 | rx_ring->bufsz, DMA_FROM_DEVICE); | |
1184 | skb_free_frag(rx_ring->rxbufs[i].frag); | |
1934680f | 1185 | rx_ring->rxbufs[i].dma_addr = 0; |
c0f031bc | 1186 | rx_ring->rxbufs[i].frag = NULL; |
4c352362 JK |
1187 | } |
1188 | } | |
1189 | ||
1190 | /** | |
1934680f JK |
1191 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
1192 | * @nn: NFP Net device | |
1193 | * @rx_ring: RX ring to remove buffers from | |
4c352362 | 1194 | */ |
1934680f JK |
1195 | static int |
1196 | nfp_net_rx_ring_bufs_alloc(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring) | |
4c352362 | 1197 | { |
1934680f JK |
1198 | struct nfp_net_rx_buf *rxbufs; |
1199 | unsigned int i; | |
1200 | ||
1201 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1202 | |
1934680f | 1203 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
c0f031bc | 1204 | rxbufs[i].frag = |
30d21171 JK |
1205 | nfp_net_rx_alloc_one(rx_ring, &rxbufs[i].dma_addr, |
1206 | rx_ring->bufsz); | |
c0f031bc | 1207 | if (!rxbufs[i].frag) { |
1934680f | 1208 | nfp_net_rx_ring_bufs_free(nn, rx_ring); |
4c352362 JK |
1209 | return -ENOMEM; |
1210 | } | |
4c352362 JK |
1211 | } |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1934680f JK |
1216 | /** |
1217 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
1218 | * @rx_ring: RX ring to fill | |
1219 | */ | |
1220 | static void nfp_net_rx_ring_fill_freelist(struct nfp_net_rx_ring *rx_ring) | |
1221 | { | |
1222 | unsigned int i; | |
1223 | ||
1224 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
c0f031bc | 1225 | nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[i].frag, |
1934680f JK |
1226 | rx_ring->rxbufs[i].dma_addr); |
1227 | } | |
1228 | ||
4c352362 JK |
1229 | /** |
1230 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1231 | * @flags: RX descriptor flags field in CPU byte order | |
1232 | */ | |
1233 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1234 | { | |
1235 | u16 csum_all_checked, csum_all_ok; | |
1236 | ||
1237 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1238 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1239 | ||
1240 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1241 | } | |
1242 | ||
1243 | /** | |
1244 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
1245 | * @nn: NFP Net device | |
1246 | * @r_vec: per-ring structure | |
1247 | * @rxd: Pointer to RX descriptor | |
1248 | * @skb: Pointer to SKB | |
1249 | */ | |
1250 | static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1251 | struct nfp_net_rx_desc *rxd, struct sk_buff *skb) | |
1252 | { | |
1253 | skb_checksum_none_assert(skb); | |
1254 | ||
1255 | if (!(nn->netdev->features & NETIF_F_RXCSUM)) | |
1256 | return; | |
1257 | ||
1258 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { | |
1259 | u64_stats_update_begin(&r_vec->rx_sync); | |
1260 | r_vec->hw_csum_rx_error++; | |
1261 | u64_stats_update_end(&r_vec->rx_sync); | |
1262 | return; | |
1263 | } | |
1264 | ||
1265 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1266 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1267 | * checksum as CSUM_OK. | |
1268 | */ | |
1269 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1270 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1271 | __skb_incr_checksum_unnecessary(skb); | |
1272 | u64_stats_update_begin(&r_vec->rx_sync); | |
1273 | r_vec->hw_csum_rx_ok++; | |
1274 | u64_stats_update_end(&r_vec->rx_sync); | |
1275 | } | |
1276 | ||
1277 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1278 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1279 | __skb_incr_checksum_unnecessary(skb); | |
1280 | u64_stats_update_begin(&r_vec->rx_sync); | |
1281 | r_vec->hw_csum_rx_inner_ok++; | |
1282 | u64_stats_update_end(&r_vec->rx_sync); | |
1283 | } | |
1284 | } | |
1285 | ||
4c352362 | 1286 | static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb, |
19d0f54e | 1287 | unsigned int type, __be32 *hash) |
4c352362 | 1288 | { |
19d0f54e | 1289 | if (!(netdev->features & NETIF_F_RXHASH)) |
4c352362 JK |
1290 | return; |
1291 | ||
19d0f54e | 1292 | switch (type) { |
4c352362 JK |
1293 | case NFP_NET_RSS_IPV4: |
1294 | case NFP_NET_RSS_IPV6: | |
1295 | case NFP_NET_RSS_IPV6_EX: | |
19d0f54e | 1296 | skb_set_hash(skb, get_unaligned_be32(hash), PKT_HASH_TYPE_L3); |
4c352362 JK |
1297 | break; |
1298 | default: | |
19d0f54e | 1299 | skb_set_hash(skb, get_unaligned_be32(hash), PKT_HASH_TYPE_L4); |
4c352362 JK |
1300 | break; |
1301 | } | |
1302 | } | |
1303 | ||
19d0f54e JK |
1304 | static void |
1305 | nfp_net_set_hash_desc(struct net_device *netdev, struct sk_buff *skb, | |
1306 | struct nfp_net_rx_desc *rxd) | |
1307 | { | |
1308 | struct nfp_net_rx_hash *rx_hash; | |
1309 | ||
1310 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) | |
1311 | return; | |
1312 | ||
1313 | rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash)); | |
1314 | ||
1315 | nfp_net_set_hash(netdev, skb, get_unaligned_be32(&rx_hash->hash_type), | |
1316 | &rx_hash->hash); | |
1317 | } | |
1318 | ||
1319 | static void * | |
1320 | nfp_net_parse_meta(struct net_device *netdev, struct sk_buff *skb, | |
1321 | int meta_len) | |
1322 | { | |
1323 | u8 *data = skb->data - meta_len; | |
1324 | u32 meta_info; | |
1325 | ||
1326 | meta_info = get_unaligned_be32(data); | |
1327 | data += 4; | |
1328 | ||
1329 | while (meta_info) { | |
1330 | switch (meta_info & NFP_NET_META_FIELD_MASK) { | |
1331 | case NFP_NET_META_HASH: | |
1332 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1333 | nfp_net_set_hash(netdev, skb, | |
1334 | meta_info & NFP_NET_META_FIELD_MASK, | |
1335 | (__be32 *)data); | |
1336 | data += 4; | |
1337 | break; | |
1338 | case NFP_NET_META_MARK: | |
1339 | skb->mark = get_unaligned_be32(data); | |
1340 | data += 4; | |
1341 | break; | |
1342 | default: | |
1343 | return NULL; | |
1344 | } | |
1345 | ||
1346 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1347 | } | |
1348 | ||
1349 | return data; | |
1350 | } | |
1351 | ||
e9949aeb JK |
1352 | static void |
1353 | nfp_net_rx_drop(struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring, | |
1354 | struct nfp_net_rx_buf *rxbuf, struct sk_buff *skb) | |
1355 | { | |
1356 | u64_stats_update_begin(&r_vec->rx_sync); | |
1357 | r_vec->rx_drops++; | |
1358 | u64_stats_update_end(&r_vec->rx_sync); | |
1359 | ||
c0f031bc JK |
1360 | /* skb is build based on the frag, free_skb() would free the frag |
1361 | * so to be able to reuse it we need an extra ref. | |
1362 | */ | |
1363 | if (skb && rxbuf && skb->head == rxbuf->frag) | |
1364 | page_ref_inc(virt_to_head_page(rxbuf->frag)); | |
e9949aeb | 1365 | if (rxbuf) |
c0f031bc | 1366 | nfp_net_rx_give_one(rx_ring, rxbuf->frag, rxbuf->dma_addr); |
e9949aeb JK |
1367 | if (skb) |
1368 | dev_kfree_skb_any(skb); | |
1369 | } | |
1370 | ||
4c352362 JK |
1371 | /** |
1372 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1373 | * @rx_ring: RX ring to receive from | |
1374 | * @budget: NAPI budget | |
1375 | * | |
1376 | * Note, this function is separated out from the napi poll function to | |
1377 | * more cleanly separate packet receive code from other bookkeeping | |
1378 | * functions performed in the napi poll function. | |
1379 | * | |
4c352362 JK |
1380 | * Return: Number of packets received. |
1381 | */ | |
1382 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1383 | { | |
1384 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1385 | struct nfp_net *nn = r_vec->nfp_net; | |
1386 | unsigned int data_len, meta_len; | |
c0f031bc | 1387 | struct nfp_net_rx_buf *rxbuf; |
4c352362 JK |
1388 | struct nfp_net_rx_desc *rxd; |
1389 | dma_addr_t new_dma_addr; | |
c0f031bc | 1390 | struct sk_buff *skb; |
416db5c1 | 1391 | int pkts_polled = 0; |
c0f031bc | 1392 | void *new_frag; |
4c352362 JK |
1393 | int idx; |
1394 | ||
416db5c1 | 1395 | while (pkts_polled < budget) { |
1a1d74d3 | 1396 | idx = rx_ring->rd_p & (rx_ring->cnt - 1); |
4c352362 JK |
1397 | |
1398 | rxd = &rx_ring->rxds[idx]; | |
416db5c1 | 1399 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) |
4c352362 | 1400 | break; |
416db5c1 | 1401 | |
4c352362 JK |
1402 | /* Memory barrier to ensure that we won't do other reads |
1403 | * before the DD bit. | |
1404 | */ | |
1405 | dma_rmb(); | |
1406 | ||
1407 | rx_ring->rd_p++; | |
1408 | pkts_polled++; | |
4c352362 | 1409 | |
c0f031bc JK |
1410 | rxbuf = &rx_ring->rxbufs[idx]; |
1411 | skb = build_skb(rxbuf->frag, nn->fl_bufsz); | |
1412 | if (unlikely(!skb)) { | |
1413 | nfp_net_rx_drop(r_vec, rx_ring, rxbuf, NULL); | |
1414 | continue; | |
1415 | } | |
b64b7bb6 | 1416 | new_frag = nfp_net_napi_alloc_one(nn, &new_dma_addr); |
c0f031bc JK |
1417 | if (unlikely(!new_frag)) { |
1418 | nfp_net_rx_drop(r_vec, rx_ring, rxbuf, skb); | |
4c352362 JK |
1419 | continue; |
1420 | } | |
1421 | ||
c0f031bc JK |
1422 | nfp_net_dma_unmap_rx(nn, rx_ring->rxbufs[idx].dma_addr, |
1423 | nn->fl_bufsz, DMA_FROM_DEVICE); | |
4c352362 | 1424 | |
c0f031bc | 1425 | nfp_net_rx_give_one(rx_ring, new_frag, new_dma_addr); |
4c352362 | 1426 | |
180012dc JK |
1427 | /* < meta_len > |
1428 | * <-- [rx_offset] --> | |
1429 | * --------------------------------------------------------- | |
1430 | * | [XX] | metadata | packet | XXXX | | |
1431 | * --------------------------------------------------------- | |
1432 | * <---------------- data_len ---------------> | |
1433 | * | |
1434 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1435 | * on a packet by packet basis. If rx_offset is set to zero | |
1436 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1437 | * buffer and is immediately followed by the packet (no [XX]). | |
1438 | */ | |
4c352362 JK |
1439 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1440 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
1441 | ||
180012dc | 1442 | if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
c0f031bc | 1443 | skb_reserve(skb, NFP_NET_RX_BUF_HEADROOM + meta_len); |
180012dc | 1444 | else |
c0f031bc JK |
1445 | skb_reserve(skb, |
1446 | NFP_NET_RX_BUF_HEADROOM + nn->rx_offset); | |
4c352362 JK |
1447 | skb_put(skb, data_len - meta_len); |
1448 | ||
4c352362 JK |
1449 | /* Stats update */ |
1450 | u64_stats_update_begin(&r_vec->rx_sync); | |
1451 | r_vec->rx_pkts++; | |
1452 | r_vec->rx_bytes += skb->len; | |
1453 | u64_stats_update_end(&r_vec->rx_sync); | |
1454 | ||
19d0f54e JK |
1455 | if (nn->fw_ver.major <= 3) { |
1456 | nfp_net_set_hash_desc(nn->netdev, skb, rxd); | |
1457 | } else if (meta_len) { | |
1458 | void *end; | |
1459 | ||
1460 | end = nfp_net_parse_meta(nn->netdev, skb, meta_len); | |
1461 | if (unlikely(end != skb->data)) { | |
19d0f54e | 1462 | nn_warn_ratelimit(nn, "invalid RX packet metadata\n"); |
e9949aeb | 1463 | nfp_net_rx_drop(r_vec, rx_ring, NULL, skb); |
19d0f54e JK |
1464 | continue; |
1465 | } | |
1466 | } | |
1467 | ||
4c352362 JK |
1468 | skb_record_rx_queue(skb, rx_ring->idx); |
1469 | skb->protocol = eth_type_trans(skb, nn->netdev); | |
1470 | ||
1471 | nfp_net_rx_csum(nn, r_vec, rxd, skb); | |
1472 | ||
1473 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) | |
1474 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
1475 | le16_to_cpu(rxd->rxd.vlan)); | |
1476 | ||
1477 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
1478 | } | |
1479 | ||
4c352362 JK |
1480 | return pkts_polled; |
1481 | } | |
1482 | ||
1483 | /** | |
1484 | * nfp_net_poll() - napi poll function | |
1485 | * @napi: NAPI structure | |
1486 | * @budget: NAPI budget | |
1487 | * | |
1488 | * Return: number of packets polled. | |
1489 | */ | |
1490 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
1491 | { | |
1492 | struct nfp_net_r_vector *r_vec = | |
1493 | container_of(napi, struct nfp_net_r_vector, napi); | |
cbeaf7aa | 1494 | unsigned int pkts_polled = 0; |
4c352362 | 1495 | |
cbeaf7aa JK |
1496 | if (r_vec->tx_ring) |
1497 | nfp_net_tx_complete(r_vec->tx_ring); | |
1498 | if (r_vec->rx_ring) | |
1499 | pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); | |
4c352362 JK |
1500 | |
1501 | if (pkts_polled < budget) { | |
1502 | napi_complete_done(napi, pkts_polled); | |
7ff5c83a | 1503 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_idx); |
4c352362 JK |
1504 | } |
1505 | ||
1506 | return pkts_polled; | |
1507 | } | |
1508 | ||
1509 | /* Setup and Configuration | |
1510 | */ | |
1511 | ||
1512 | /** | |
1513 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
1514 | * @tx_ring: TX ring to free | |
1515 | */ | |
1516 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
1517 | { | |
1518 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1519 | struct nfp_net *nn = r_vec->nfp_net; | |
1520 | struct pci_dev *pdev = nn->pdev; | |
1521 | ||
4c352362 JK |
1522 | kfree(tx_ring->txbufs); |
1523 | ||
1524 | if (tx_ring->txds) | |
1525 | dma_free_coherent(&pdev->dev, tx_ring->size, | |
1526 | tx_ring->txds, tx_ring->dma); | |
1527 | ||
1528 | tx_ring->cnt = 0; | |
4c352362 JK |
1529 | tx_ring->txbufs = NULL; |
1530 | tx_ring->txds = NULL; | |
1531 | tx_ring->dma = 0; | |
1532 | tx_ring->size = 0; | |
1533 | } | |
1534 | ||
1535 | /** | |
1536 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
1537 | * @tx_ring: TX Ring structure to allocate | |
a98cb258 | 1538 | * @cnt: Ring buffer count |
4c352362 JK |
1539 | * |
1540 | * Return: 0 on success, negative errno otherwise. | |
1541 | */ | |
a98cb258 | 1542 | static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring, u32 cnt) |
4c352362 JK |
1543 | { |
1544 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
1545 | struct nfp_net *nn = r_vec->nfp_net; | |
1546 | struct pci_dev *pdev = nn->pdev; | |
1547 | int sz; | |
1548 | ||
a98cb258 | 1549 | tx_ring->cnt = cnt; |
4c352362 JK |
1550 | |
1551 | tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; | |
1552 | tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size, | |
1553 | &tx_ring->dma, GFP_KERNEL); | |
1554 | if (!tx_ring->txds) | |
1555 | goto err_alloc; | |
1556 | ||
1557 | sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; | |
1558 | tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); | |
1559 | if (!tx_ring->txbufs) | |
1560 | goto err_alloc; | |
1561 | ||
4c352362 JK |
1562 | netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx); |
1563 | ||
1564 | nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n", | |
1565 | tx_ring->idx, tx_ring->qcidx, | |
1566 | tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds); | |
1567 | ||
1568 | return 0; | |
1569 | ||
1570 | err_alloc: | |
1571 | nfp_net_tx_ring_free(tx_ring); | |
1572 | return -ENOMEM; | |
1573 | } | |
1574 | ||
cc7c0333 | 1575 | static struct nfp_net_tx_ring * |
0ae42dfc | 1576 | nfp_net_tx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_ring_set *s) |
cc7c0333 JK |
1577 | { |
1578 | struct nfp_net_tx_ring *rings; | |
1579 | unsigned int r; | |
1580 | ||
164d1e9e | 1581 | rings = kcalloc(s->n_rings, sizeof(*rings), GFP_KERNEL); |
cc7c0333 JK |
1582 | if (!rings) |
1583 | return NULL; | |
1584 | ||
164d1e9e JK |
1585 | for (r = 0; r < s->n_rings; r++) { |
1586 | nfp_net_tx_ring_init(&rings[r], &nn->r_vecs[r], r); | |
cc7c0333 | 1587 | |
68453c7a | 1588 | if (nfp_net_tx_ring_alloc(&rings[r], s->dcnt)) |
cc7c0333 JK |
1589 | goto err_free_prev; |
1590 | } | |
1591 | ||
68453c7a | 1592 | return s->rings = rings; |
cc7c0333 JK |
1593 | |
1594 | err_free_prev: | |
1595 | while (r--) | |
1596 | nfp_net_tx_ring_free(&rings[r]); | |
1597 | kfree(rings); | |
1598 | return NULL; | |
1599 | } | |
1600 | ||
68453c7a | 1601 | static void |
0ae42dfc | 1602 | nfp_net_tx_ring_set_swap(struct nfp_net *nn, struct nfp_net_ring_set *s) |
cc7c0333 | 1603 | { |
68453c7a | 1604 | struct nfp_net_ring_set new = *s; |
cc7c0333 | 1605 | |
68453c7a JK |
1606 | s->dcnt = nn->txd_cnt; |
1607 | s->rings = nn->tx_rings; | |
164d1e9e | 1608 | s->n_rings = nn->num_tx_rings; |
68453c7a | 1609 | |
68453c7a JK |
1610 | nn->txd_cnt = new.dcnt; |
1611 | nn->tx_rings = new.rings; | |
164d1e9e | 1612 | nn->num_tx_rings = new.n_rings; |
cc7c0333 JK |
1613 | } |
1614 | ||
1615 | static void | |
0ae42dfc | 1616 | nfp_net_tx_ring_set_free(struct nfp_net *nn, struct nfp_net_ring_set *s) |
cc7c0333 | 1617 | { |
68453c7a | 1618 | struct nfp_net_tx_ring *rings = s->rings; |
cc7c0333 JK |
1619 | unsigned int r; |
1620 | ||
164d1e9e | 1621 | for (r = 0; r < s->n_rings; r++) |
cc7c0333 JK |
1622 | nfp_net_tx_ring_free(&rings[r]); |
1623 | ||
1624 | kfree(rings); | |
1625 | } | |
1626 | ||
4c352362 JK |
1627 | /** |
1628 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
1629 | * @rx_ring: RX ring to free | |
1630 | */ | |
1631 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
1632 | { | |
1633 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1634 | struct nfp_net *nn = r_vec->nfp_net; | |
1635 | struct pci_dev *pdev = nn->pdev; | |
1636 | ||
4c352362 JK |
1637 | kfree(rx_ring->rxbufs); |
1638 | ||
1639 | if (rx_ring->rxds) | |
1640 | dma_free_coherent(&pdev->dev, rx_ring->size, | |
1641 | rx_ring->rxds, rx_ring->dma); | |
1642 | ||
1643 | rx_ring->cnt = 0; | |
4c352362 JK |
1644 | rx_ring->rxbufs = NULL; |
1645 | rx_ring->rxds = NULL; | |
1646 | rx_ring->dma = 0; | |
1647 | rx_ring->size = 0; | |
1648 | } | |
1649 | ||
1650 | /** | |
1651 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
1652 | * @rx_ring: RX ring to allocate | |
30d21171 | 1653 | * @fl_bufsz: Size of buffers to allocate |
a98cb258 | 1654 | * @cnt: Ring buffer count |
4c352362 JK |
1655 | * |
1656 | * Return: 0 on success, negative errno otherwise. | |
1657 | */ | |
30d21171 | 1658 | static int |
a98cb258 JK |
1659 | nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring, unsigned int fl_bufsz, |
1660 | u32 cnt) | |
4c352362 JK |
1661 | { |
1662 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
1663 | struct nfp_net *nn = r_vec->nfp_net; | |
1664 | struct pci_dev *pdev = nn->pdev; | |
1665 | int sz; | |
1666 | ||
a98cb258 | 1667 | rx_ring->cnt = cnt; |
30d21171 | 1668 | rx_ring->bufsz = fl_bufsz; |
4c352362 JK |
1669 | |
1670 | rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; | |
1671 | rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size, | |
1672 | &rx_ring->dma, GFP_KERNEL); | |
1673 | if (!rx_ring->rxds) | |
1674 | goto err_alloc; | |
1675 | ||
1676 | sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; | |
1677 | rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); | |
1678 | if (!rx_ring->rxbufs) | |
1679 | goto err_alloc; | |
1680 | ||
4c352362 JK |
1681 | nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n", |
1682 | rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx, | |
1683 | rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds); | |
1684 | ||
1685 | return 0; | |
1686 | ||
1687 | err_alloc: | |
1688 | nfp_net_rx_ring_free(rx_ring); | |
1689 | return -ENOMEM; | |
1690 | } | |
1691 | ||
36a857e4 | 1692 | static struct nfp_net_rx_ring * |
0ae42dfc | 1693 | nfp_net_rx_ring_set_prepare(struct nfp_net *nn, struct nfp_net_ring_set *s) |
36a857e4 | 1694 | { |
68453c7a | 1695 | unsigned int fl_bufsz = nfp_net_calc_fl_bufsz(nn, s->mtu); |
36a857e4 JK |
1696 | struct nfp_net_rx_ring *rings; |
1697 | unsigned int r; | |
1698 | ||
164d1e9e | 1699 | rings = kcalloc(s->n_rings, sizeof(*rings), GFP_KERNEL); |
36a857e4 JK |
1700 | if (!rings) |
1701 | return NULL; | |
1702 | ||
164d1e9e JK |
1703 | for (r = 0; r < s->n_rings; r++) { |
1704 | nfp_net_rx_ring_init(&rings[r], &nn->r_vecs[r], r); | |
36a857e4 | 1705 | |
68453c7a | 1706 | if (nfp_net_rx_ring_alloc(&rings[r], fl_bufsz, s->dcnt)) |
36a857e4 JK |
1707 | goto err_free_prev; |
1708 | ||
1709 | if (nfp_net_rx_ring_bufs_alloc(nn, &rings[r])) | |
1710 | goto err_free_ring; | |
1711 | } | |
1712 | ||
68453c7a | 1713 | return s->rings = rings; |
36a857e4 JK |
1714 | |
1715 | err_free_prev: | |
1716 | while (r--) { | |
1717 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); | |
1718 | err_free_ring: | |
1719 | nfp_net_rx_ring_free(&rings[r]); | |
1720 | } | |
1721 | kfree(rings); | |
1722 | return NULL; | |
1723 | } | |
1724 | ||
68453c7a | 1725 | static void |
0ae42dfc | 1726 | nfp_net_rx_ring_set_swap(struct nfp_net *nn, struct nfp_net_ring_set *s) |
36a857e4 | 1727 | { |
68453c7a | 1728 | struct nfp_net_ring_set new = *s; |
36a857e4 | 1729 | |
68453c7a JK |
1730 | s->mtu = nn->netdev->mtu; |
1731 | s->dcnt = nn->rxd_cnt; | |
1732 | s->rings = nn->rx_rings; | |
164d1e9e | 1733 | s->n_rings = nn->num_rx_rings; |
68453c7a | 1734 | |
68453c7a JK |
1735 | nn->netdev->mtu = new.mtu; |
1736 | nn->fl_bufsz = nfp_net_calc_fl_bufsz(nn, new.mtu); | |
1737 | nn->rxd_cnt = new.dcnt; | |
1738 | nn->rx_rings = new.rings; | |
164d1e9e | 1739 | nn->num_rx_rings = new.n_rings; |
36a857e4 JK |
1740 | } |
1741 | ||
1742 | static void | |
0ae42dfc | 1743 | nfp_net_rx_ring_set_free(struct nfp_net *nn, struct nfp_net_ring_set *s) |
36a857e4 | 1744 | { |
68453c7a | 1745 | struct nfp_net_rx_ring *rings = s->rings; |
36a857e4 JK |
1746 | unsigned int r; |
1747 | ||
164d1e9e | 1748 | for (r = 0; r < s->n_rings; r++) { |
36a857e4 JK |
1749 | nfp_net_rx_ring_bufs_free(nn, &rings[r]); |
1750 | nfp_net_rx_ring_free(&rings[r]); | |
1751 | } | |
1752 | ||
1753 | kfree(rings); | |
1754 | } | |
1755 | ||
e31230f9 JK |
1756 | static void |
1757 | nfp_net_vector_assign_rings(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1758 | int idx) | |
1759 | { | |
1760 | r_vec->rx_ring = idx < nn->num_rx_rings ? &nn->rx_rings[idx] : NULL; | |
1761 | r_vec->tx_ring = idx < nn->num_tx_rings ? &nn->tx_rings[idx] : NULL; | |
1762 | } | |
1763 | ||
0afbfb18 JK |
1764 | static int |
1765 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1766 | int idx) | |
4c352362 | 1767 | { |
0afbfb18 JK |
1768 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
1769 | int err; | |
4c352362 | 1770 | |
164d1e9e JK |
1771 | /* Setup NAPI */ |
1772 | netif_napi_add(nn->netdev, &r_vec->napi, | |
1773 | nfp_net_poll, NAPI_POLL_WEIGHT); | |
1774 | ||
0afbfb18 JK |
1775 | snprintf(r_vec->name, sizeof(r_vec->name), |
1776 | "%s-rxtx-%d", nn->netdev->name, idx); | |
1777 | err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec); | |
1778 | if (err) { | |
164d1e9e | 1779 | netif_napi_del(&r_vec->napi); |
0afbfb18 JK |
1780 | nn_err(nn, "Error requesting IRQ %d\n", entry->vector); |
1781 | return err; | |
1782 | } | |
aba52df8 | 1783 | disable_irq(entry->vector); |
4c352362 | 1784 | |
0afbfb18 | 1785 | irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask); |
4c352362 | 1786 | |
0afbfb18 | 1787 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry); |
4c352362 | 1788 | |
0afbfb18 | 1789 | return 0; |
4c352362 JK |
1790 | } |
1791 | ||
0afbfb18 JK |
1792 | static void |
1793 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 1794 | { |
0afbfb18 | 1795 | struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx]; |
4c352362 | 1796 | |
4c352362 | 1797 | irq_set_affinity_hint(entry->vector, NULL); |
4c352362 | 1798 | netif_napi_del(&r_vec->napi); |
0afbfb18 | 1799 | free_irq(entry->vector, r_vec); |
4c352362 JK |
1800 | } |
1801 | ||
1802 | /** | |
1803 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
1804 | * @nn: NFP Net device to reconfigure | |
1805 | */ | |
1806 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
1807 | { | |
1808 | int i; | |
1809 | ||
1810 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
1811 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
1812 | get_unaligned_le32(nn->rss_itbl + i)); | |
1813 | } | |
1814 | ||
1815 | /** | |
1816 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
1817 | * @nn: NFP Net device to reconfigure | |
1818 | */ | |
1819 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
1820 | { | |
1821 | int i; | |
1822 | ||
1823 | for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4) | |
1824 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, | |
1825 | get_unaligned_le32(nn->rss_key + i)); | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
1830 | * @nn: NFP Net device to reconfigure | |
1831 | */ | |
1832 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
1833 | { | |
1834 | u8 i; | |
1835 | u32 factor; | |
1836 | u32 value; | |
1837 | ||
1838 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
1839 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
1840 | * count. | |
1841 | */ | |
1842 | factor = nn->me_freq_mhz / 16; | |
1843 | ||
1844 | /* copy RX interrupt coalesce parameters */ | |
1845 | value = (nn->rx_coalesce_max_frames << 16) | | |
1846 | (factor * nn->rx_coalesce_usecs); | |
cbeaf7aa | 1847 | for (i = 0; i < nn->num_rx_rings; i++) |
4c352362 JK |
1848 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); |
1849 | ||
1850 | /* copy TX interrupt coalesce parameters */ | |
1851 | value = (nn->tx_coalesce_max_frames << 16) | | |
1852 | (factor * nn->tx_coalesce_usecs); | |
cbeaf7aa | 1853 | for (i = 0; i < nn->num_tx_rings; i++) |
4c352362 JK |
1854 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); |
1855 | } | |
1856 | ||
1857 | /** | |
f642963b | 1858 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 1859 | * @nn: NFP Net device to reconfigure |
4c352362 | 1860 | * |
f642963b JK |
1861 | * Writes the MAC address from the netdev to the device control BAR. Does not |
1862 | * perform the required reconfig. We do a bit of byte swapping dance because | |
1863 | * firmware is LE. | |
4c352362 | 1864 | */ |
f642963b | 1865 | static void nfp_net_write_mac_addr(struct nfp_net *nn) |
4c352362 JK |
1866 | { |
1867 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, | |
1868 | get_unaligned_be32(nn->netdev->dev_addr)); | |
416db5c1 JK |
1869 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, |
1870 | get_unaligned_be16(nn->netdev->dev_addr + 4)); | |
4c352362 JK |
1871 | } |
1872 | ||
ca40feab JK |
1873 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
1874 | { | |
1875 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
1876 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
1877 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
1878 | ||
1879 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
1880 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
1881 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
1882 | } | |
1883 | ||
4c352362 JK |
1884 | /** |
1885 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
1886 | * @nn: NFP Net device to reconfigure | |
1887 | */ | |
1888 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
1889 | { | |
1890 | u32 new_ctrl, update; | |
ca40feab | 1891 | unsigned int r; |
4c352362 JK |
1892 | int err; |
1893 | ||
1894 | new_ctrl = nn->ctrl; | |
1895 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; | |
1896 | update = NFP_NET_CFG_UPDATE_GEN; | |
1897 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1898 | update |= NFP_NET_CFG_UPDATE_RING; | |
1899 | ||
1900 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1901 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
1902 | ||
1903 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
1904 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
1905 | ||
1906 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1907 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 1908 | if (err) |
4c352362 | 1909 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 1910 | |
cbeaf7aa | 1911 | for (r = 0; r < nn->num_rx_rings; r++) |
0668b60b | 1912 | nfp_net_rx_ring_reset(&nn->rx_rings[r]); |
cbeaf7aa | 1913 | for (r = 0; r < nn->num_tx_rings; r++) |
0668b60b | 1914 | nfp_net_tx_ring_reset(nn, &nn->tx_rings[r]); |
cbeaf7aa | 1915 | for (r = 0; r < nn->num_r_vecs; r++) |
ca40feab JK |
1916 | nfp_net_vec_clear_ring_data(nn, r); |
1917 | ||
4c352362 JK |
1918 | nn->ctrl = new_ctrl; |
1919 | } | |
1920 | ||
ca40feab | 1921 | static void |
cbeaf7aa JK |
1922 | nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, |
1923 | struct nfp_net_rx_ring *rx_ring, unsigned int idx) | |
ca40feab JK |
1924 | { |
1925 | /* Write the DMA address, size and MSI-X info to the device */ | |
cbeaf7aa JK |
1926 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma); |
1927 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt)); | |
1928 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_idx); | |
1929 | } | |
ca40feab | 1930 | |
cbeaf7aa JK |
1931 | static void |
1932 | nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, | |
1933 | struct nfp_net_tx_ring *tx_ring, unsigned int idx) | |
1934 | { | |
1935 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma); | |
1936 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt)); | |
1937 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_idx); | |
ca40feab JK |
1938 | } |
1939 | ||
1cd0cfc4 JK |
1940 | static int __nfp_net_set_config_and_enable(struct nfp_net *nn) |
1941 | { | |
1942 | u32 new_ctrl, update = 0; | |
1943 | unsigned int r; | |
1944 | int err; | |
1945 | ||
1946 | new_ctrl = nn->ctrl; | |
1947 | ||
1948 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
1949 | nfp_net_rss_write_key(nn); | |
1950 | nfp_net_rss_write_itbl(nn); | |
1951 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
1952 | update |= NFP_NET_CFG_UPDATE_RSS; | |
1953 | } | |
1954 | ||
1955 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
1956 | nfp_net_coalesce_write_cfg(nn); | |
1957 | ||
1958 | new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
1959 | update |= NFP_NET_CFG_UPDATE_IRQMOD; | |
1960 | } | |
1961 | ||
cbeaf7aa JK |
1962 | for (r = 0; r < nn->num_tx_rings; r++) |
1963 | nfp_net_tx_ring_hw_cfg_write(nn, &nn->tx_rings[r], r); | |
1964 | for (r = 0; r < nn->num_rx_rings; r++) | |
1965 | nfp_net_rx_ring_hw_cfg_write(nn, &nn->rx_rings[r], r); | |
1cd0cfc4 JK |
1966 | |
1967 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ? | |
1968 | 0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1); | |
1969 | ||
1970 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ? | |
1971 | 0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1); | |
1972 | ||
f642963b | 1973 | nfp_net_write_mac_addr(nn); |
1cd0cfc4 JK |
1974 | |
1975 | nn_writel(nn, NFP_NET_CFG_MTU, nn->netdev->mtu); | |
1976 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz); | |
1977 | ||
1978 | /* Enable device */ | |
1979 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
1980 | update |= NFP_NET_CFG_UPDATE_GEN; | |
1981 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
1982 | update |= NFP_NET_CFG_UPDATE_RING; | |
1983 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
1984 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
1985 | ||
1986 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
1987 | err = nfp_net_reconfig(nn, update); | |
1988 | ||
1989 | nn->ctrl = new_ctrl; | |
1990 | ||
cbeaf7aa | 1991 | for (r = 0; r < nn->num_rx_rings; r++) |
0668b60b | 1992 | nfp_net_rx_ring_fill_freelist(&nn->rx_rings[r]); |
aba52df8 | 1993 | |
1cd0cfc4 JK |
1994 | /* Since reconfiguration requests while NFP is down are ignored we |
1995 | * have to wipe the entire VXLAN configuration and reinitialize it. | |
1996 | */ | |
1997 | if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) { | |
1998 | memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); | |
1999 | memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); | |
3ab68837 | 2000 | udp_tunnel_get_rx_info(nn->netdev); |
1cd0cfc4 JK |
2001 | } |
2002 | ||
2003 | return err; | |
2004 | } | |
2005 | ||
2006 | /** | |
2007 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
2008 | * @nn: NFP Net device to reconfigure | |
2009 | */ | |
2010 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
2011 | { | |
2012 | int err; | |
2013 | ||
2014 | err = __nfp_net_set_config_and_enable(nn); | |
2015 | if (err) | |
2016 | nfp_net_clear_config_and_disable(nn); | |
2017 | ||
2018 | return err; | |
2019 | } | |
2020 | ||
1cd0cfc4 JK |
2021 | /** |
2022 | * nfp_net_open_stack() - Start the device from stack's perspective | |
2023 | * @nn: NFP Net device to reconfigure | |
2024 | */ | |
2025 | static void nfp_net_open_stack(struct nfp_net *nn) | |
2026 | { | |
2027 | unsigned int r; | |
2028 | ||
aba52df8 JK |
2029 | for (r = 0; r < nn->num_r_vecs; r++) { |
2030 | napi_enable(&nn->r_vecs[r].napi); | |
2031 | enable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
2032 | } | |
1cd0cfc4 JK |
2033 | |
2034 | netif_tx_wake_all_queues(nn->netdev); | |
2035 | ||
ce449ba7 | 2036 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
2037 | nfp_net_read_link_status(nn); |
2038 | } | |
2039 | ||
4c352362 JK |
2040 | static int nfp_net_netdev_open(struct net_device *netdev) |
2041 | { | |
2042 | struct nfp_net *nn = netdev_priv(netdev); | |
a10b563d | 2043 | struct nfp_net_ring_set rx = { |
164d1e9e | 2044 | .n_rings = nn->num_rx_rings, |
a10b563d JK |
2045 | .mtu = nn->netdev->mtu, |
2046 | .dcnt = nn->rxd_cnt, | |
2047 | }; | |
2048 | struct nfp_net_ring_set tx = { | |
164d1e9e | 2049 | .n_rings = nn->num_tx_rings, |
a10b563d JK |
2050 | .dcnt = nn->txd_cnt, |
2051 | }; | |
4c352362 | 2052 | int err, r; |
4c352362 JK |
2053 | |
2054 | if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) { | |
2055 | nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl); | |
2056 | return -EBUSY; | |
2057 | } | |
2058 | ||
4c352362 JK |
2059 | /* Step 1: Allocate resources for rings and the like |
2060 | * - Request interrupts | |
2061 | * - Allocate RX and TX ring resources | |
2062 | * - Setup initial RSS table | |
2063 | */ | |
2064 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", | |
2065 | nn->exn_name, sizeof(nn->exn_name), | |
2066 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2067 | if (err) | |
2068 | return err; | |
0ba40af9 JK |
2069 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2070 | nn->lsc_name, sizeof(nn->lsc_name), | |
2071 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2072 | if (err) | |
2073 | goto err_free_exn; | |
ce449ba7 | 2074 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2075 | |
0afbfb18 JK |
2076 | for (r = 0; r < nn->num_r_vecs; r++) { |
2077 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); | |
2078 | if (err) | |
cbeaf7aa JK |
2079 | goto err_cleanup_vec_p; |
2080 | } | |
a10b563d JK |
2081 | |
2082 | nn->rx_rings = nfp_net_rx_ring_set_prepare(nn, &rx); | |
2083 | if (!nn->rx_rings) { | |
2084 | err = -ENOMEM; | |
2085 | goto err_cleanup_vec; | |
cbeaf7aa | 2086 | } |
114bdef0 | 2087 | |
a10b563d JK |
2088 | nn->tx_rings = nfp_net_tx_ring_set_prepare(nn, &tx); |
2089 | if (!nn->tx_rings) { | |
2090 | err = -ENOMEM; | |
2091 | goto err_free_rx_rings; | |
0afbfb18 | 2092 | } |
4c352362 | 2093 | |
e31230f9 JK |
2094 | for (r = 0; r < nn->max_r_vecs; r++) |
2095 | nfp_net_vector_assign_rings(nn, &nn->r_vecs[r], r); | |
2096 | ||
4c352362 JK |
2097 | err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings); |
2098 | if (err) | |
2099 | goto err_free_rings; | |
2100 | ||
2101 | err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings); | |
2102 | if (err) | |
2103 | goto err_free_rings; | |
2104 | ||
4c352362 JK |
2105 | /* Step 2: Configure the NFP |
2106 | * - Enable rings from 0 to tx_rings/rx_rings - 1. | |
2107 | * - Write MAC address (in case it changed) | |
2108 | * - Set the MTU | |
2109 | * - Set the Freelist buffer size | |
2110 | * - Enable the FW | |
2111 | */ | |
1cd0cfc4 | 2112 | err = nfp_net_set_config_and_enable(nn); |
4c352362 | 2113 | if (err) |
1cd0cfc4 | 2114 | goto err_free_rings; |
4c352362 JK |
2115 | |
2116 | /* Step 3: Enable for kernel | |
2117 | * - put some freelist descriptors on each RX ring | |
2118 | * - enable NAPI on each ring | |
2119 | * - enable all TX queues | |
2120 | * - set link state | |
2121 | */ | |
1cd0cfc4 | 2122 | nfp_net_open_stack(nn); |
4c352362 JK |
2123 | |
2124 | return 0; | |
2125 | ||
4c352362 | 2126 | err_free_rings: |
a10b563d JK |
2127 | nfp_net_tx_ring_set_free(nn, &tx); |
2128 | err_free_rx_rings: | |
2129 | nfp_net_rx_ring_set_free(nn, &rx); | |
2130 | err_cleanup_vec: | |
cbeaf7aa | 2131 | r = nn->num_r_vecs; |
0afbfb18 | 2132 | err_cleanup_vec_p: |
cbeaf7aa | 2133 | while (r--) |
0afbfb18 | 2134 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
0ba40af9 | 2135 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 JK |
2136 | err_free_exn: |
2137 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2138 | return err; | |
2139 | } | |
2140 | ||
2141 | /** | |
1cd0cfc4 JK |
2142 | * nfp_net_close_stack() - Quiescent the stack (part of close) |
2143 | * @nn: NFP Net device to reconfigure | |
4c352362 | 2144 | */ |
1cd0cfc4 | 2145 | static void nfp_net_close_stack(struct nfp_net *nn) |
4c352362 | 2146 | { |
1cd0cfc4 | 2147 | unsigned int r; |
4c352362 | 2148 | |
ce449ba7 | 2149 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 | 2150 | netif_carrier_off(nn->netdev); |
4c352362 JK |
2151 | nn->link_up = false; |
2152 | ||
aba52df8 JK |
2153 | for (r = 0; r < nn->num_r_vecs; r++) { |
2154 | disable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector); | |
4c352362 | 2155 | napi_disable(&nn->r_vecs[r].napi); |
aba52df8 | 2156 | } |
4c352362 | 2157 | |
1cd0cfc4 JK |
2158 | netif_tx_disable(nn->netdev); |
2159 | } | |
4c352362 | 2160 | |
1cd0cfc4 JK |
2161 | /** |
2162 | * nfp_net_close_free_all() - Free all runtime resources | |
2163 | * @nn: NFP Net device to reconfigure | |
2164 | */ | |
2165 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2166 | { | |
2167 | unsigned int r; | |
4c352362 | 2168 | |
cbeaf7aa | 2169 | for (r = 0; r < nn->num_rx_rings; r++) { |
0668b60b JK |
2170 | nfp_net_rx_ring_bufs_free(nn, &nn->rx_rings[r]); |
2171 | nfp_net_rx_ring_free(&nn->rx_rings[r]); | |
cbeaf7aa JK |
2172 | } |
2173 | for (r = 0; r < nn->num_tx_rings; r++) | |
0668b60b | 2174 | nfp_net_tx_ring_free(&nn->tx_rings[r]); |
cbeaf7aa | 2175 | for (r = 0; r < nn->num_r_vecs; r++) |
0afbfb18 | 2176 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
4c352362 | 2177 | |
73725d9d JK |
2178 | kfree(nn->rx_rings); |
2179 | kfree(nn->tx_rings); | |
2180 | ||
0ba40af9 | 2181 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 | 2182 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); |
1cd0cfc4 JK |
2183 | } |
2184 | ||
2185 | /** | |
2186 | * nfp_net_netdev_close() - Called when the device is downed | |
2187 | * @netdev: netdev structure | |
2188 | */ | |
2189 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2190 | { | |
2191 | struct nfp_net *nn = netdev_priv(netdev); | |
2192 | ||
2193 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) { | |
2194 | nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl); | |
2195 | return 0; | |
2196 | } | |
2197 | ||
2198 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective | |
2199 | */ | |
2200 | nfp_net_close_stack(nn); | |
2201 | ||
2202 | /* Step 2: Tell NFP | |
2203 | */ | |
2204 | nfp_net_clear_config_and_disable(nn); | |
2205 | ||
2206 | /* Step 3: Free resources | |
2207 | */ | |
2208 | nfp_net_close_free_all(nn); | |
4c352362 JK |
2209 | |
2210 | nn_dbg(nn, "%s down", netdev->name); | |
2211 | return 0; | |
2212 | } | |
2213 | ||
2214 | static void nfp_net_set_rx_mode(struct net_device *netdev) | |
2215 | { | |
2216 | struct nfp_net *nn = netdev_priv(netdev); | |
2217 | u32 new_ctrl; | |
2218 | ||
2219 | new_ctrl = nn->ctrl; | |
2220 | ||
2221 | if (netdev->flags & IFF_PROMISC) { | |
2222 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
2223 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
2224 | else | |
2225 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
2226 | } else { | |
2227 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
2228 | } | |
2229 | ||
2230 | if (new_ctrl == nn->ctrl) | |
2231 | return; | |
2232 | ||
2233 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 2234 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 JK |
2235 | |
2236 | nn->ctrl = new_ctrl; | |
2237 | } | |
2238 | ||
1e9e10d0 JK |
2239 | static void nfp_net_rss_init_itbl(struct nfp_net *nn) |
2240 | { | |
2241 | int i; | |
2242 | ||
2243 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
2244 | nn->rss_itbl[i] = | |
2245 | ethtool_rxfh_indir_default(i, nn->num_rx_rings); | |
2246 | } | |
2247 | ||
68453c7a | 2248 | static int |
164d1e9e | 2249 | nfp_net_ring_swap_enable(struct nfp_net *nn, unsigned int *num_vecs, |
68453c7a JK |
2250 | struct nfp_net_ring_set *rx, |
2251 | struct nfp_net_ring_set *tx) | |
4c352362 | 2252 | { |
e31230f9 | 2253 | unsigned int r; |
164d1e9e | 2254 | int err; |
e31230f9 | 2255 | |
68453c7a | 2256 | if (rx) |
0ae42dfc | 2257 | nfp_net_rx_ring_set_swap(nn, rx); |
68453c7a | 2258 | if (tx) |
0ae42dfc | 2259 | nfp_net_tx_ring_set_swap(nn, tx); |
36a857e4 | 2260 | |
164d1e9e JK |
2261 | swap(*num_vecs, nn->num_r_vecs); |
2262 | ||
e31230f9 JK |
2263 | for (r = 0; r < nn->max_r_vecs; r++) |
2264 | nfp_net_vector_assign_rings(nn, &nn->r_vecs[r], r); | |
2265 | ||
164d1e9e JK |
2266 | if (nn->netdev->real_num_rx_queues != nn->num_rx_rings) { |
2267 | if (!netif_is_rxfh_configured(nn->netdev)) | |
2268 | nfp_net_rss_init_itbl(nn); | |
2269 | ||
2270 | err = netif_set_real_num_rx_queues(nn->netdev, | |
2271 | nn->num_rx_rings); | |
2272 | if (err) | |
2273 | return err; | |
2274 | } | |
2275 | ||
2276 | if (nn->netdev->real_num_tx_queues != nn->num_tx_rings) { | |
2277 | err = netif_set_real_num_tx_queues(nn->netdev, | |
2278 | nn->num_tx_rings); | |
2279 | if (err) | |
2280 | return err; | |
2281 | } | |
2282 | ||
68453c7a JK |
2283 | return __nfp_net_set_config_and_enable(nn); |
2284 | } | |
36a857e4 | 2285 | |
68453c7a JK |
2286 | static void |
2287 | nfp_net_ring_reconfig_down(struct nfp_net *nn, | |
2288 | struct nfp_net_ring_set *rx, | |
164d1e9e JK |
2289 | struct nfp_net_ring_set *tx, |
2290 | unsigned int num_vecs) | |
68453c7a JK |
2291 | { |
2292 | nn->netdev->mtu = rx ? rx->mtu : nn->netdev->mtu; | |
2293 | nn->fl_bufsz = nfp_net_calc_fl_bufsz(nn, nn->netdev->mtu); | |
2294 | nn->rxd_cnt = rx ? rx->dcnt : nn->rxd_cnt; | |
2295 | nn->txd_cnt = tx ? tx->dcnt : nn->txd_cnt; | |
164d1e9e JK |
2296 | nn->num_rx_rings = rx ? rx->n_rings : nn->num_rx_rings; |
2297 | nn->num_tx_rings = tx ? tx->n_rings : nn->num_tx_rings; | |
2298 | nn->num_r_vecs = num_vecs; | |
2299 | ||
2300 | if (!netif_is_rxfh_configured(nn->netdev)) | |
2301 | nfp_net_rss_init_itbl(nn); | |
4c352362 JK |
2302 | } |
2303 | ||
68453c7a JK |
2304 | int |
2305 | nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_ring_set *rx, | |
2306 | struct nfp_net_ring_set *tx) | |
cc7c0333 | 2307 | { |
164d1e9e | 2308 | unsigned int num_vecs, r; |
cc7c0333 JK |
2309 | int err; |
2310 | ||
164d1e9e JK |
2311 | num_vecs = max(rx ? rx->n_rings : nn->num_rx_rings, |
2312 | tx ? tx->n_rings : nn->num_tx_rings); | |
2313 | ||
cc7c0333 | 2314 | if (!netif_running(nn->netdev)) { |
164d1e9e | 2315 | nfp_net_ring_reconfig_down(nn, rx, tx, num_vecs); |
cc7c0333 JK |
2316 | return 0; |
2317 | } | |
2318 | ||
cc7c0333 | 2319 | /* Prepare new rings */ |
164d1e9e JK |
2320 | for (r = nn->num_r_vecs; r < num_vecs; r++) { |
2321 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); | |
2322 | if (err) { | |
2323 | num_vecs = r; | |
2324 | goto err_cleanup_vecs; | |
2325 | } | |
2326 | } | |
68453c7a | 2327 | if (rx) { |
164d1e9e JK |
2328 | if (!nfp_net_rx_ring_set_prepare(nn, rx)) { |
2329 | err = -ENOMEM; | |
2330 | goto err_cleanup_vecs; | |
2331 | } | |
cc7c0333 | 2332 | } |
68453c7a | 2333 | if (tx) { |
0ae42dfc | 2334 | if (!nfp_net_tx_ring_set_prepare(nn, tx)) { |
68453c7a JK |
2335 | err = -ENOMEM; |
2336 | goto err_free_rx; | |
cc7c0333 JK |
2337 | } |
2338 | } | |
2339 | ||
2340 | /* Stop device, swap in new rings, try to start the firmware */ | |
2341 | nfp_net_close_stack(nn); | |
2342 | nfp_net_clear_config_and_disable(nn); | |
2343 | ||
164d1e9e | 2344 | err = nfp_net_ring_swap_enable(nn, &num_vecs, rx, tx); |
cc7c0333 | 2345 | if (err) { |
68453c7a | 2346 | int err2; |
cc7c0333 | 2347 | |
68453c7a | 2348 | nfp_net_clear_config_and_disable(nn); |
cc7c0333 | 2349 | |
68453c7a | 2350 | /* Try with old configuration and old rings */ |
164d1e9e | 2351 | err2 = nfp_net_ring_swap_enable(nn, &num_vecs, rx, tx); |
68453c7a | 2352 | if (err2) |
cc7c0333 | 2353 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", |
68453c7a | 2354 | err, err2); |
cc7c0333 | 2355 | } |
164d1e9e JK |
2356 | for (r = num_vecs - 1; r >= nn->num_r_vecs; r--) |
2357 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
cc7c0333 | 2358 | |
68453c7a | 2359 | if (rx) |
0ae42dfc | 2360 | nfp_net_rx_ring_set_free(nn, rx); |
68453c7a | 2361 | if (tx) |
0ae42dfc | 2362 | nfp_net_tx_ring_set_free(nn, tx); |
cc7c0333 JK |
2363 | |
2364 | nfp_net_open_stack(nn); | |
2365 | ||
2366 | return err; | |
68453c7a JK |
2367 | |
2368 | err_free_rx: | |
2369 | if (rx) | |
0ae42dfc | 2370 | nfp_net_rx_ring_set_free(nn, rx); |
164d1e9e JK |
2371 | err_cleanup_vecs: |
2372 | for (r = num_vecs - 1; r >= nn->num_r_vecs; r--) | |
2373 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
68453c7a JK |
2374 | return err; |
2375 | } | |
2376 | ||
2377 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
2378 | { | |
2379 | struct nfp_net *nn = netdev_priv(netdev); | |
2380 | struct nfp_net_ring_set rx = { | |
164d1e9e | 2381 | .n_rings = nn->num_rx_rings, |
68453c7a JK |
2382 | .mtu = new_mtu, |
2383 | .dcnt = nn->rxd_cnt, | |
2384 | }; | |
2385 | ||
2386 | return nfp_net_ring_reconfig(nn, &rx, NULL); | |
cc7c0333 JK |
2387 | } |
2388 | ||
4c352362 JK |
2389 | static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev, |
2390 | struct rtnl_link_stats64 *stats) | |
2391 | { | |
2392 | struct nfp_net *nn = netdev_priv(netdev); | |
2393 | int r; | |
2394 | ||
2395 | for (r = 0; r < nn->num_r_vecs; r++) { | |
2396 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; | |
2397 | u64 data[3]; | |
2398 | unsigned int start; | |
2399 | ||
2400 | do { | |
2401 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
2402 | data[0] = r_vec->rx_pkts; | |
2403 | data[1] = r_vec->rx_bytes; | |
2404 | data[2] = r_vec->rx_drops; | |
2405 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
2406 | stats->rx_packets += data[0]; | |
2407 | stats->rx_bytes += data[1]; | |
2408 | stats->rx_dropped += data[2]; | |
2409 | ||
2410 | do { | |
2411 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
2412 | data[0] = r_vec->tx_pkts; | |
2413 | data[1] = r_vec->tx_bytes; | |
2414 | data[2] = r_vec->tx_errors; | |
2415 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
2416 | stats->tx_packets += data[0]; | |
2417 | stats->tx_bytes += data[1]; | |
2418 | stats->tx_errors += data[2]; | |
2419 | } | |
2420 | ||
2421 | return stats; | |
2422 | } | |
2423 | ||
7533fdc0 JK |
2424 | static bool nfp_net_ebpf_capable(struct nfp_net *nn) |
2425 | { | |
2426 | if (nn->cap & NFP_NET_CFG_CTRL_BPF && | |
2427 | nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI) | |
2428 | return true; | |
2429 | return false; | |
2430 | } | |
2431 | ||
2432 | static int | |
2433 | nfp_net_setup_tc(struct net_device *netdev, u32 handle, __be16 proto, | |
2434 | struct tc_to_netdev *tc) | |
2435 | { | |
2436 | struct nfp_net *nn = netdev_priv(netdev); | |
2437 | ||
2438 | if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS)) | |
2439 | return -ENOTSUPP; | |
2440 | if (proto != htons(ETH_P_ALL)) | |
2441 | return -ENOTSUPP; | |
2442 | ||
2443 | if (tc->type == TC_SETUP_CLSBPF && nfp_net_ebpf_capable(nn)) | |
2444 | return nfp_net_bpf_offload(nn, handle, proto, tc->cls_bpf); | |
2445 | ||
2446 | return -EINVAL; | |
2447 | } | |
2448 | ||
4c352362 JK |
2449 | static int nfp_net_set_features(struct net_device *netdev, |
2450 | netdev_features_t features) | |
2451 | { | |
2452 | netdev_features_t changed = netdev->features ^ features; | |
2453 | struct nfp_net *nn = netdev_priv(netdev); | |
2454 | u32 new_ctrl; | |
2455 | int err; | |
2456 | ||
2457 | /* Assume this is not called with features we have not advertised */ | |
2458 | ||
2459 | new_ctrl = nn->ctrl; | |
2460 | ||
2461 | if (changed & NETIF_F_RXCSUM) { | |
2462 | if (features & NETIF_F_RXCSUM) | |
2463 | new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2464 | else | |
2465 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM; | |
2466 | } | |
2467 | ||
2468 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
2469 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
2470 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2471 | else | |
2472 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
2473 | } | |
2474 | ||
2475 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
2476 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
2477 | new_ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2478 | else | |
2479 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO; | |
2480 | } | |
2481 | ||
2482 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
2483 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
2484 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2485 | else | |
2486 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
2487 | } | |
2488 | ||
2489 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
2490 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
2491 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2492 | else | |
2493 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
2494 | } | |
2495 | ||
2496 | if (changed & NETIF_F_SG) { | |
2497 | if (features & NETIF_F_SG) | |
2498 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2499 | else | |
2500 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
2501 | } | |
2502 | ||
7533fdc0 JK |
2503 | if (changed & NETIF_F_HW_TC && nn->ctrl & NFP_NET_CFG_CTRL_BPF) { |
2504 | nn_err(nn, "Cannot disable HW TC offload while in use\n"); | |
2505 | return -EBUSY; | |
2506 | } | |
2507 | ||
4c352362 JK |
2508 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", |
2509 | netdev->features, features, changed); | |
2510 | ||
2511 | if (new_ctrl == nn->ctrl) | |
2512 | return 0; | |
2513 | ||
2514 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl); | |
2515 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2516 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
2517 | if (err) | |
2518 | return err; | |
2519 | ||
2520 | nn->ctrl = new_ctrl; | |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
2525 | static netdev_features_t | |
2526 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
2527 | netdev_features_t features) | |
2528 | { | |
2529 | u8 l4_hdr; | |
2530 | ||
2531 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
2532 | features &= vlan_features_check(skb, features); | |
2533 | ||
2534 | if (!skb->encapsulation) | |
2535 | return features; | |
2536 | ||
2537 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
2538 | if (skb_is_gso(skb)) { | |
2539 | u32 hdrlen; | |
2540 | ||
2541 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
2542 | inner_tcp_hdrlen(skb); | |
2543 | ||
2544 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) | |
2545 | features &= ~NETIF_F_GSO_MASK; | |
2546 | } | |
2547 | ||
2548 | /* VXLAN/GRE check */ | |
2549 | switch (vlan_get_protocol(skb)) { | |
2550 | case htons(ETH_P_IP): | |
2551 | l4_hdr = ip_hdr(skb)->protocol; | |
2552 | break; | |
2553 | case htons(ETH_P_IPV6): | |
2554 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
2555 | break; | |
2556 | default: | |
a188222b | 2557 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2558 | } |
2559 | ||
2560 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
2561 | skb->inner_protocol != htons(ETH_P_TEB) || | |
2562 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
2563 | (l4_hdr == IPPROTO_UDP && | |
2564 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
2565 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 2566 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2567 | |
2568 | return features; | |
2569 | } | |
2570 | ||
2571 | /** | |
2572 | * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW | |
2573 | * @nn: NFP Net device to reconfigure | |
2574 | * @idx: Index into the port table where new port should be written | |
2575 | * @port: UDP port to configure (pass zero to remove VXLAN port) | |
2576 | */ | |
2577 | static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) | |
2578 | { | |
2579 | int i; | |
2580 | ||
2581 | nn->vxlan_ports[idx] = port; | |
2582 | ||
2583 | if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN)) | |
2584 | return; | |
2585 | ||
2586 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
2587 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) | |
2588 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), | |
2589 | be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | | |
2590 | be16_to_cpu(nn->vxlan_ports[i])); | |
2591 | ||
3d780b92 | 2592 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN); |
4c352362 JK |
2593 | } |
2594 | ||
2595 | /** | |
2596 | * nfp_net_find_vxlan_idx() - find table entry of the port or a free one | |
2597 | * @nn: NFP Network structure | |
2598 | * @port: UDP port to look for | |
2599 | * | |
2600 | * Return: if the port is already in the table -- it's position; | |
2601 | * if the port is not in the table -- free position to use; | |
2602 | * if the table is full -- -ENOSPC. | |
2603 | */ | |
2604 | static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) | |
2605 | { | |
2606 | int i, free_idx = -ENOSPC; | |
2607 | ||
2608 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { | |
2609 | if (nn->vxlan_ports[i] == port) | |
2610 | return i; | |
2611 | if (!nn->vxlan_usecnt[i]) | |
2612 | free_idx = i; | |
2613 | } | |
2614 | ||
2615 | return free_idx; | |
2616 | } | |
2617 | ||
2618 | static void nfp_net_add_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2619 | struct udp_tunnel_info *ti) |
4c352362 JK |
2620 | { |
2621 | struct nfp_net *nn = netdev_priv(netdev); | |
2622 | int idx; | |
2623 | ||
3ab68837 AD |
2624 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2625 | return; | |
2626 | ||
2627 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
4c352362 JK |
2628 | if (idx == -ENOSPC) |
2629 | return; | |
2630 | ||
2631 | if (!nn->vxlan_usecnt[idx]++) | |
3ab68837 | 2632 | nfp_net_set_vxlan_port(nn, idx, ti->port); |
4c352362 JK |
2633 | } |
2634 | ||
2635 | static void nfp_net_del_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2636 | struct udp_tunnel_info *ti) |
4c352362 JK |
2637 | { |
2638 | struct nfp_net *nn = netdev_priv(netdev); | |
2639 | int idx; | |
2640 | ||
3ab68837 AD |
2641 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2642 | return; | |
2643 | ||
2644 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
f50cef6f | 2645 | if (idx == -ENOSPC || !nn->vxlan_usecnt[idx]) |
4c352362 JK |
2646 | return; |
2647 | ||
2648 | if (!--nn->vxlan_usecnt[idx]) | |
2649 | nfp_net_set_vxlan_port(nn, idx, 0); | |
2650 | } | |
2651 | ||
2652 | static const struct net_device_ops nfp_net_netdev_ops = { | |
2653 | .ndo_open = nfp_net_netdev_open, | |
2654 | .ndo_stop = nfp_net_netdev_close, | |
2655 | .ndo_start_xmit = nfp_net_tx, | |
2656 | .ndo_get_stats64 = nfp_net_stat64, | |
7533fdc0 | 2657 | .ndo_setup_tc = nfp_net_setup_tc, |
4c352362 JK |
2658 | .ndo_tx_timeout = nfp_net_tx_timeout, |
2659 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
2660 | .ndo_change_mtu = nfp_net_change_mtu, | |
2661 | .ndo_set_mac_address = eth_mac_addr, | |
2662 | .ndo_set_features = nfp_net_set_features, | |
2663 | .ndo_features_check = nfp_net_features_check, | |
3ab68837 AD |
2664 | .ndo_udp_tunnel_add = nfp_net_add_vxlan_port, |
2665 | .ndo_udp_tunnel_del = nfp_net_del_vxlan_port, | |
4c352362 JK |
2666 | }; |
2667 | ||
2668 | /** | |
2669 | * nfp_net_info() - Print general info about the NIC | |
2670 | * @nn: NFP Net device to reconfigure | |
2671 | */ | |
2672 | void nfp_net_info(struct nfp_net *nn) | |
2673 | { | |
416db5c1 | 2674 | nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", |
4c352362 JK |
2675 | nn->is_vf ? "VF " : "", |
2676 | nn->num_tx_rings, nn->max_tx_rings, | |
2677 | nn->num_rx_rings, nn->max_rx_rings); | |
2678 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", | |
2679 | nn->fw_ver.resv, nn->fw_ver.class, | |
2680 | nn->fw_ver.major, nn->fw_ver.minor, | |
2681 | nn->max_mtu); | |
7533fdc0 | 2682 | 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 |
2683 | nn->cap, |
2684 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
2685 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
2686 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
2687 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
2688 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
2689 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
2690 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
2691 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
2692 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
2693 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "", | |
2694 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "", | |
2695 | nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", | |
2696 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", | |
2697 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
2698 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
7533fdc0 JK |
2699 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", |
2700 | nfp_net_ebpf_capable(nn) ? "BPF " : ""); | |
4c352362 JK |
2701 | } |
2702 | ||
2703 | /** | |
2704 | * nfp_net_netdev_alloc() - Allocate netdev and related structure | |
2705 | * @pdev: PCI device | |
2706 | * @max_tx_rings: Maximum number of TX rings supported by device | |
2707 | * @max_rx_rings: Maximum number of RX rings supported by device | |
2708 | * | |
2709 | * This function allocates a netdev device and fills in the initial | |
2710 | * part of the @struct nfp_net structure. | |
2711 | * | |
2712 | * Return: NFP Net device structure, or ERR_PTR on error. | |
2713 | */ | |
2714 | struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev, | |
a4b562bb JK |
2715 | unsigned int max_tx_rings, |
2716 | unsigned int max_rx_rings) | |
4c352362 JK |
2717 | { |
2718 | struct net_device *netdev; | |
2719 | struct nfp_net *nn; | |
4c352362 JK |
2720 | |
2721 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), | |
2722 | max_tx_rings, max_rx_rings); | |
2723 | if (!netdev) | |
2724 | return ERR_PTR(-ENOMEM); | |
2725 | ||
2726 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2727 | nn = netdev_priv(netdev); | |
2728 | ||
2729 | nn->netdev = netdev; | |
2730 | nn->pdev = pdev; | |
2731 | ||
2732 | nn->max_tx_rings = max_tx_rings; | |
2733 | nn->max_rx_rings = max_rx_rings; | |
2734 | ||
cbeaf7aa JK |
2735 | nn->num_tx_rings = min_t(unsigned int, max_tx_rings, num_online_cpus()); |
2736 | nn->num_rx_rings = min_t(unsigned int, max_rx_rings, | |
2737 | netif_get_num_default_rss_queues()); | |
4c352362 | 2738 | |
4b27a1eb JK |
2739 | nn->num_r_vecs = max(nn->num_tx_rings, nn->num_rx_rings); |
2740 | nn->num_r_vecs = min_t(unsigned int, nn->num_r_vecs, num_online_cpus()); | |
2741 | ||
4c352362 JK |
2742 | nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT; |
2743 | nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
2744 | ||
2745 | spin_lock_init(&nn->reconfig_lock); | |
66860beb | 2746 | spin_lock_init(&nn->rx_filter_lock); |
4c352362 JK |
2747 | spin_lock_init(&nn->link_status_lock); |
2748 | ||
3d780b92 JK |
2749 | setup_timer(&nn->reconfig_timer, |
2750 | nfp_net_reconfig_timer, (unsigned long)nn); | |
66860beb JK |
2751 | setup_timer(&nn->rx_filter_stats_timer, |
2752 | nfp_net_filter_stats_timer, (unsigned long)nn); | |
3d780b92 | 2753 | |
4c352362 JK |
2754 | return nn; |
2755 | } | |
2756 | ||
2757 | /** | |
2758 | * nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did | |
2759 | * @nn: NFP Net device to reconfigure | |
2760 | */ | |
2761 | void nfp_net_netdev_free(struct nfp_net *nn) | |
2762 | { | |
2763 | free_netdev(nn->netdev); | |
2764 | } | |
2765 | ||
2766 | /** | |
2767 | * nfp_net_rss_init() - Set the initial RSS parameters | |
2768 | * @nn: NFP Net device to reconfigure | |
2769 | */ | |
2770 | static void nfp_net_rss_init(struct nfp_net *nn) | |
2771 | { | |
4c352362 JK |
2772 | netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ); |
2773 | ||
1e9e10d0 | 2774 | nfp_net_rss_init_itbl(nn); |
4c352362 JK |
2775 | |
2776 | /* Enable IPv4/IPv6 TCP by default */ | |
2777 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
2778 | NFP_NET_CFG_RSS_IPV6_TCP | | |
2779 | NFP_NET_CFG_RSS_TOEPLITZ | | |
2780 | NFP_NET_CFG_RSS_MASK; | |
2781 | } | |
2782 | ||
2783 | /** | |
2784 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
2785 | * @nn: NFP Net device to reconfigure | |
2786 | */ | |
2787 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
2788 | { | |
2789 | nn->rx_coalesce_usecs = 50; | |
2790 | nn->rx_coalesce_max_frames = 64; | |
2791 | nn->tx_coalesce_usecs = 50; | |
2792 | nn->tx_coalesce_max_frames = 64; | |
2793 | } | |
2794 | ||
2795 | /** | |
2796 | * nfp_net_netdev_init() - Initialise/finalise the netdev structure | |
2797 | * @netdev: netdev structure | |
2798 | * | |
2799 | * Return: 0 on success or negative errno on error. | |
2800 | */ | |
2801 | int nfp_net_netdev_init(struct net_device *netdev) | |
2802 | { | |
2803 | struct nfp_net *nn = netdev_priv(netdev); | |
2804 | int err; | |
2805 | ||
2806 | /* Get some of the read-only fields from the BAR */ | |
2807 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
2808 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
2809 | ||
f642963b | 2810 | nfp_net_write_mac_addr(nn); |
4c352362 | 2811 | |
bf187ea0 JK |
2812 | /* Determine RX packet/metadata boundary offset */ |
2813 | if (nn->fw_ver.major >= 2) | |
2814 | nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
2815 | else | |
2816 | nn->rx_offset = NFP_NET_RX_OFFSET; | |
2817 | ||
4c352362 JK |
2818 | /* Set default MTU and Freelist buffer size */ |
2819 | if (nn->max_mtu < NFP_NET_DEFAULT_MTU) | |
2820 | netdev->mtu = nn->max_mtu; | |
2821 | else | |
2822 | netdev->mtu = NFP_NET_DEFAULT_MTU; | |
bf187ea0 | 2823 | nn->fl_bufsz = nfp_net_calc_fl_bufsz(nn, netdev->mtu); |
4c352362 JK |
2824 | |
2825 | /* Advertise/enable offloads based on capabilities | |
2826 | * | |
2827 | * Note: netdev->features show the currently enabled features | |
2828 | * and netdev->hw_features advertises which features are | |
2829 | * supported. By default we enable most features. | |
2830 | */ | |
2831 | netdev->hw_features = NETIF_F_HIGHDMA; | |
2832 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) { | |
2833 | netdev->hw_features |= NETIF_F_RXCSUM; | |
2834 | nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM; | |
2835 | } | |
2836 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
2837 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
2838 | nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2839 | } | |
2840 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
2841 | netdev->hw_features |= NETIF_F_SG; | |
2842 | nn->ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2843 | } | |
2844 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) { | |
2845 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; | |
2846 | nn->ctrl |= NFP_NET_CFG_CTRL_LSO; | |
2847 | } | |
2848 | if (nn->cap & NFP_NET_CFG_CTRL_RSS) { | |
2849 | netdev->hw_features |= NETIF_F_RXHASH; | |
2850 | nfp_net_rss_init(nn); | |
2851 | nn->ctrl |= NFP_NET_CFG_CTRL_RSS; | |
2852 | } | |
2853 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && | |
2854 | nn->cap & NFP_NET_CFG_CTRL_NVGRE) { | |
2855 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
2856 | netdev->hw_features |= NETIF_F_GSO_GRE | | |
2857 | NETIF_F_GSO_UDP_TUNNEL; | |
2858 | nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; | |
2859 | ||
2860 | netdev->hw_enc_features = netdev->hw_features; | |
2861 | } | |
2862 | ||
2863 | netdev->vlan_features = netdev->hw_features; | |
2864 | ||
2865 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
2866 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
2867 | nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2868 | } | |
2869 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
2870 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
2871 | nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2872 | } | |
2873 | ||
2874 | netdev->features = netdev->hw_features; | |
2875 | ||
7533fdc0 JK |
2876 | if (nfp_net_ebpf_capable(nn)) |
2877 | netdev->hw_features |= NETIF_F_HW_TC; | |
2878 | ||
4c352362 JK |
2879 | /* Advertise but disable TSO by default. */ |
2880 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
2881 | ||
2882 | /* Allow L2 Broadcast and Multicast through by default, if supported */ | |
2883 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
2884 | nn->ctrl |= NFP_NET_CFG_CTRL_L2BC; | |
2885 | if (nn->cap & NFP_NET_CFG_CTRL_L2MC) | |
2886 | nn->ctrl |= NFP_NET_CFG_CTRL_L2MC; | |
2887 | ||
2888 | /* Allow IRQ moderation, if supported */ | |
2889 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
2890 | nfp_net_irqmod_init(nn); | |
2891 | nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD; | |
2892 | } | |
2893 | ||
4c352362 JK |
2894 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
2895 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
2896 | ||
2897 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
2898 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
2899 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2900 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2901 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
2902 | NFP_NET_CFG_UPDATE_GEN); | |
2903 | if (err) | |
2904 | return err; | |
2905 | ||
2906 | /* Finalise the netdev setup */ | |
4c352362 JK |
2907 | netdev->netdev_ops = &nfp_net_netdev_ops; |
2908 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
44770e11 JW |
2909 | |
2910 | /* MTU range: 68 - hw-specific max */ | |
2911 | netdev->min_mtu = ETH_MIN_MTU; | |
2912 | netdev->max_mtu = nn->max_mtu; | |
2913 | ||
4b402d71 | 2914 | netif_carrier_off(netdev); |
4c352362 JK |
2915 | |
2916 | nfp_net_set_ethtool_ops(netdev); | |
2917 | nfp_net_irqs_assign(netdev); | |
2918 | ||
2919 | return register_netdev(netdev); | |
2920 | } | |
2921 | ||
2922 | /** | |
2923 | * nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did. | |
2924 | * @netdev: netdev structure | |
2925 | */ | |
2926 | void nfp_net_netdev_clean(struct net_device *netdev) | |
2927 | { | |
2928 | unregister_netdev(netdev); | |
2929 | } |