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4c352362 | 1 | /* |
fdace6c2 | 2 | * Copyright (C) 2015-2017 Netronome Systems, Inc. |
4c352362 JK |
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 | ||
9ff304bf | 44 | #include <linux/bitfield.h> |
ecd63a02 | 45 | #include <linux/bpf.h> |
a67edbf4 | 46 | #include <linux/bpf_trace.h> |
4c352362 JK |
47 | #include <linux/module.h> |
48 | #include <linux/kernel.h> | |
49 | #include <linux/init.h> | |
50 | #include <linux/fs.h> | |
51 | #include <linux/netdevice.h> | |
52 | #include <linux/etherdevice.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/ip.h> | |
55 | #include <linux/ipv6.h> | |
c0f031bc | 56 | #include <linux/page_ref.h> |
4c352362 JK |
57 | #include <linux/pci.h> |
58 | #include <linux/pci_regs.h> | |
59 | #include <linux/msi.h> | |
60 | #include <linux/ethtool.h> | |
61 | #include <linux/log2.h> | |
62 | #include <linux/if_vlan.h> | |
63 | #include <linux/random.h> | |
a7b1ad08 | 64 | #include <linux/vmalloc.h> |
4c352362 JK |
65 | #include <linux/ktime.h> |
66 | ||
8f15df60 | 67 | #include <net/switchdev.h> |
4c352362 JK |
68 | #include <net/vxlan.h> |
69 | ||
ce22f5a2 | 70 | #include "nfpcore/nfp_nsp.h" |
bb45e51c | 71 | #include "nfp_app.h" |
4c352362 JK |
72 | #include "nfp_net_ctrl.h" |
73 | #include "nfp_net.h" | |
eb488c26 | 74 | #include "nfp_port.h" |
4c352362 JK |
75 | |
76 | /** | |
77 | * nfp_net_get_fw_version() - Read and parse the FW version | |
78 | * @fw_ver: Output fw_version structure to read to | |
79 | * @ctrl_bar: Mapped address of the control BAR | |
80 | */ | |
81 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
82 | void __iomem *ctrl_bar) | |
83 | { | |
84 | u32 reg; | |
85 | ||
86 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
87 | put_unaligned_le32(reg, fw_ver); | |
88 | } | |
89 | ||
c487e6b1 | 90 | static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag) |
c0f031bc | 91 | { |
5cd4fbea JK |
92 | return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM, |
93 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
94 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
95 | } | |
96 | ||
97 | static void | |
98 | nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr) | |
99 | { | |
100 | dma_sync_single_for_device(dp->dev, dma_addr, | |
101 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
102 | dp->rx_dma_dir); | |
c0f031bc JK |
103 | } |
104 | ||
c487e6b1 | 105 | static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr) |
c0f031bc | 106 | { |
5cd4fbea JK |
107 | dma_unmap_single_attrs(dp->dev, dma_addr, |
108 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
109 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
110 | } | |
111 | ||
112 | static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr, | |
113 | unsigned int len) | |
114 | { | |
115 | dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM, | |
116 | len, dp->rx_dma_dir); | |
c0f031bc JK |
117 | } |
118 | ||
3d780b92 JK |
119 | /* Firmware reconfig |
120 | * | |
121 | * Firmware reconfig may take a while so we have two versions of it - | |
122 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
123 | * RTNL so we don't have to worry about serializing them. | |
124 | */ | |
125 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
126 | { | |
127 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
128 | /* ensure update is written before pinging HW */ | |
129 | nn_pci_flush(nn); | |
130 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
131 | } | |
132 | ||
133 | /* Pass 0 as update to run posted reconfigs. */ | |
134 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
135 | { | |
136 | update |= nn->reconfig_posted; | |
137 | nn->reconfig_posted = 0; | |
138 | ||
139 | nfp_net_reconfig_start(nn, update); | |
140 | ||
141 | nn->reconfig_timer_active = true; | |
142 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
143 | } | |
144 | ||
145 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
146 | { | |
147 | u32 reg; | |
148 | ||
149 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
150 | if (reg == 0) | |
151 | return true; | |
152 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
153 | nn_err(nn, "Reconfig error: 0x%08x\n", reg); | |
154 | return true; | |
155 | } else if (last_check) { | |
156 | nn_err(nn, "Reconfig timeout: 0x%08x\n", reg); | |
157 | return true; | |
158 | } | |
159 | ||
160 | return false; | |
161 | } | |
162 | ||
163 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
164 | { | |
165 | bool timed_out = false; | |
166 | ||
167 | /* Poll update field, waiting for NFP to ack the config */ | |
168 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { | |
169 | msleep(1); | |
170 | timed_out = time_is_before_eq_jiffies(deadline); | |
171 | } | |
172 | ||
173 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) | |
174 | return -EIO; | |
175 | ||
176 | return timed_out ? -EIO : 0; | |
177 | } | |
178 | ||
179 | static void nfp_net_reconfig_timer(unsigned long data) | |
180 | { | |
181 | struct nfp_net *nn = (void *)data; | |
182 | ||
183 | spin_lock_bh(&nn->reconfig_lock); | |
184 | ||
185 | nn->reconfig_timer_active = false; | |
186 | ||
187 | /* If sync caller is present it will take over from us */ | |
188 | if (nn->reconfig_sync_present) | |
189 | goto done; | |
190 | ||
191 | /* Read reconfig status and report errors */ | |
192 | nfp_net_reconfig_check_done(nn, true); | |
193 | ||
194 | if (nn->reconfig_posted) | |
195 | nfp_net_reconfig_start_async(nn, 0); | |
196 | done: | |
197 | spin_unlock_bh(&nn->reconfig_lock); | |
198 | } | |
199 | ||
200 | /** | |
201 | * nfp_net_reconfig_post() - Post async reconfig request | |
202 | * @nn: NFP Net device to reconfigure | |
203 | * @update: The value for the update field in the BAR config | |
204 | * | |
205 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
206 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
207 | * merged together! | |
208 | */ | |
209 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
210 | { | |
211 | spin_lock_bh(&nn->reconfig_lock); | |
212 | ||
213 | /* Sync caller will kick off async reconf when it's done, just post */ | |
214 | if (nn->reconfig_sync_present) { | |
215 | nn->reconfig_posted |= update; | |
216 | goto done; | |
217 | } | |
218 | ||
219 | /* Opportunistically check if the previous command is done */ | |
220 | if (!nn->reconfig_timer_active || | |
221 | nfp_net_reconfig_check_done(nn, false)) | |
222 | nfp_net_reconfig_start_async(nn, update); | |
223 | else | |
224 | nn->reconfig_posted |= update; | |
225 | done: | |
226 | spin_unlock_bh(&nn->reconfig_lock); | |
227 | } | |
228 | ||
4c352362 JK |
229 | /** |
230 | * nfp_net_reconfig() - Reconfigure the firmware | |
231 | * @nn: NFP Net device to reconfigure | |
232 | * @update: The value for the update field in the BAR config | |
233 | * | |
234 | * Write the update word to the BAR and ping the reconfig queue. The | |
235 | * poll until the firmware has acknowledged the update by zeroing the | |
236 | * update word. | |
237 | * | |
238 | * Return: Negative errno on error, 0 on success | |
239 | */ | |
240 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) | |
241 | { | |
3d780b92 JK |
242 | bool cancelled_timer = false; |
243 | u32 pre_posted_requests; | |
244 | int ret; | |
4c352362 JK |
245 | |
246 | spin_lock_bh(&nn->reconfig_lock); | |
247 | ||
3d780b92 | 248 | nn->reconfig_sync_present = true; |
4c352362 | 249 | |
3d780b92 JK |
250 | if (nn->reconfig_timer_active) { |
251 | del_timer(&nn->reconfig_timer); | |
252 | nn->reconfig_timer_active = false; | |
253 | cancelled_timer = true; | |
254 | } | |
255 | pre_posted_requests = nn->reconfig_posted; | |
256 | nn->reconfig_posted = 0; | |
257 | ||
258 | spin_unlock_bh(&nn->reconfig_lock); | |
259 | ||
260 | if (cancelled_timer) | |
261 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); | |
262 | ||
263 | /* Run the posted reconfigs which were issued before we started */ | |
264 | if (pre_posted_requests) { | |
265 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
266 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 JK |
267 | } |
268 | ||
3d780b92 JK |
269 | nfp_net_reconfig_start(nn, update); |
270 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
271 | ||
272 | spin_lock_bh(&nn->reconfig_lock); | |
273 | ||
274 | if (nn->reconfig_posted) | |
275 | nfp_net_reconfig_start_async(nn, 0); | |
276 | ||
277 | nn->reconfig_sync_present = false; | |
278 | ||
4c352362 | 279 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 280 | |
4c352362 JK |
281 | return ret; |
282 | } | |
283 | ||
b64052fc PC |
284 | /** |
285 | * nfp_net_reconfig_mbox() - Reconfigure the firmware via the mailbox | |
286 | * @nn: NFP Net device to reconfigure | |
287 | * @mbox_cmd: The value for the mailbox command | |
288 | * | |
289 | * Helper function for mailbox updates | |
290 | * | |
291 | * Return: Negative errno on error, 0 on success | |
292 | */ | |
293 | static int nfp_net_reconfig_mbox(struct nfp_net *nn, u32 mbox_cmd) | |
294 | { | |
295 | int ret; | |
296 | ||
297 | nn_writeq(nn, NFP_NET_CFG_MBOX_CMD, mbox_cmd); | |
298 | ||
299 | ret = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX); | |
300 | if (ret) { | |
301 | nn_err(nn, "Mailbox update error\n"); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | return -nn_readl(nn, NFP_NET_CFG_MBOX_RET); | |
306 | } | |
307 | ||
4c352362 JK |
308 | /* Interrupt configuration and handling |
309 | */ | |
310 | ||
4c352362 JK |
311 | /** |
312 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
313 | * @nn: NFP Network structure | |
314 | * @entry_nr: MSI-X table entry | |
315 | * | |
416db5c1 | 316 | * Clear the ICR for the IRQ entry. |
4c352362 JK |
317 | */ |
318 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
319 | { | |
4c352362 JK |
320 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); |
321 | nn_pci_flush(nn); | |
322 | } | |
323 | ||
324 | /** | |
fdace6c2 JK |
325 | * nfp_net_irqs_alloc() - allocates MSI-X irqs |
326 | * @pdev: PCI device structure | |
327 | * @irq_entries: Array to be initialized and used to hold the irq entries | |
328 | * @min_irqs: Minimal acceptable number of interrupts | |
329 | * @wanted_irqs: Target number of interrupts to allocate | |
4c352362 | 330 | * |
fdace6c2 | 331 | * Return: Number of irqs obtained or 0 on error. |
4c352362 | 332 | */ |
fdace6c2 JK |
333 | unsigned int |
334 | nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, | |
335 | unsigned int min_irqs, unsigned int wanted_irqs) | |
4c352362 | 336 | { |
fdace6c2 JK |
337 | unsigned int i; |
338 | int got_irqs; | |
4c352362 | 339 | |
fdace6c2 JK |
340 | for (i = 0; i < wanted_irqs; i++) |
341 | irq_entries[i].entry = i; | |
4c352362 | 342 | |
fdace6c2 JK |
343 | got_irqs = pci_enable_msix_range(pdev, irq_entries, |
344 | min_irqs, wanted_irqs); | |
345 | if (got_irqs < 0) { | |
346 | dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n", | |
347 | min_irqs, wanted_irqs, got_irqs); | |
4c352362 JK |
348 | return 0; |
349 | } | |
350 | ||
fdace6c2 JK |
351 | if (got_irqs < wanted_irqs) |
352 | dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n", | |
353 | wanted_irqs, got_irqs); | |
354 | ||
355 | return got_irqs; | |
4c352362 JK |
356 | } |
357 | ||
4c352362 | 358 | /** |
fdace6c2 JK |
359 | * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev |
360 | * @nn: NFP Network structure | |
361 | * @irq_entries: Table of allocated interrupts | |
362 | * @n: Size of @irq_entries (number of entries to grab) | |
4c352362 | 363 | * |
fdace6c2 JK |
364 | * After interrupts are allocated with nfp_net_irqs_alloc() this function |
365 | * should be called to assign them to a specific netdev (port). | |
4c352362 | 366 | */ |
fdace6c2 JK |
367 | void |
368 | nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, | |
369 | unsigned int n) | |
4c352362 | 370 | { |
79c12a75 JK |
371 | struct nfp_net_dp *dp = &nn->dp; |
372 | ||
b33ae997 | 373 | nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS; |
79c12a75 | 374 | dp->num_r_vecs = nn->max_r_vecs; |
4c352362 | 375 | |
fdace6c2 | 376 | memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n); |
4c352362 | 377 | |
79c12a75 JK |
378 | if (dp->num_rx_rings > dp->num_r_vecs || |
379 | dp->num_tx_rings > dp->num_r_vecs) | |
87232d96 JK |
380 | dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n", |
381 | dp->num_rx_rings, dp->num_tx_rings, | |
382 | dp->num_r_vecs); | |
fdace6c2 | 383 | |
79c12a75 JK |
384 | dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings); |
385 | dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings); | |
386 | dp->num_stack_tx_rings = dp->num_tx_rings; | |
4c352362 JK |
387 | } |
388 | ||
389 | /** | |
390 | * nfp_net_irqs_disable() - Disable interrupts | |
fdace6c2 | 391 | * @pdev: PCI device structure |
4c352362 JK |
392 | * |
393 | * Undoes what @nfp_net_irqs_alloc() does. | |
394 | */ | |
fdace6c2 | 395 | void nfp_net_irqs_disable(struct pci_dev *pdev) |
4c352362 | 396 | { |
fdace6c2 | 397 | pci_disable_msix(pdev); |
4c352362 JK |
398 | } |
399 | ||
400 | /** | |
401 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
402 | * @irq: Interrupt | |
403 | * @data: Opaque data structure | |
404 | * | |
405 | * Return: Indicate if the interrupt has been handled. | |
406 | */ | |
407 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
408 | { | |
409 | struct nfp_net_r_vector *r_vec = data; | |
410 | ||
411 | napi_schedule_irqoff(&r_vec->napi); | |
412 | ||
413 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
414 | * the MSI-X table or via the per entry ICR field. So there | |
415 | * is no need to disable interrupts here. | |
416 | */ | |
417 | return IRQ_HANDLED; | |
418 | } | |
419 | ||
77ece8d5 JK |
420 | static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data) |
421 | { | |
422 | struct nfp_net_r_vector *r_vec = data; | |
423 | ||
424 | tasklet_schedule(&r_vec->tasklet); | |
425 | ||
426 | return IRQ_HANDLED; | |
427 | } | |
428 | ||
4c352362 JK |
429 | /** |
430 | * nfp_net_read_link_status() - Reread link status from control BAR | |
431 | * @nn: NFP Network structure | |
432 | */ | |
433 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
434 | { | |
435 | unsigned long flags; | |
436 | bool link_up; | |
437 | u32 sts; | |
438 | ||
439 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
440 | ||
441 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
442 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
443 | ||
444 | if (nn->link_up == link_up) | |
445 | goto out; | |
446 | ||
447 | nn->link_up = link_up; | |
6d4f8cba JK |
448 | if (nn->port) |
449 | set_bit(NFP_PORT_CHANGED, &nn->port->flags); | |
4c352362 JK |
450 | |
451 | if (nn->link_up) { | |
79c12a75 JK |
452 | netif_carrier_on(nn->dp.netdev); |
453 | netdev_info(nn->dp.netdev, "NIC Link is Up\n"); | |
4c352362 | 454 | } else { |
79c12a75 JK |
455 | netif_carrier_off(nn->dp.netdev); |
456 | netdev_info(nn->dp.netdev, "NIC Link is Down\n"); | |
4c352362 JK |
457 | } |
458 | out: | |
459 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
460 | } | |
461 | ||
462 | /** | |
463 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
464 | * @irq: Interrupt | |
465 | * @data: Opaque data structure | |
466 | * | |
467 | * Return: Indicate if the interrupt has been handled. | |
468 | */ | |
469 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
470 | { | |
471 | struct nfp_net *nn = data; | |
fdace6c2 JK |
472 | struct msix_entry *entry; |
473 | ||
474 | entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX]; | |
4c352362 JK |
475 | |
476 | nfp_net_read_link_status(nn); | |
477 | ||
fdace6c2 | 478 | nfp_net_irq_unmask(nn, entry->entry); |
4c352362 JK |
479 | |
480 | return IRQ_HANDLED; | |
481 | } | |
482 | ||
483 | /** | |
484 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
485 | * @irq: Interrupt | |
486 | * @data: Opaque data structure | |
487 | * | |
488 | * Return: Indicate if the interrupt has been handled. | |
489 | */ | |
490 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
491 | { | |
492 | struct nfp_net *nn = data; | |
493 | ||
494 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
495 | /* XXX TO BE IMPLEMENTED */ | |
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
499 | /** | |
500 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
501 | * @tx_ring: TX ring structure | |
d79737c2 JK |
502 | * @r_vec: IRQ vector servicing this ring |
503 | * @idx: Ring index | |
92e68195 | 504 | * @is_xdp: Is this an XDP TX ring? |
4c352362 | 505 | */ |
d79737c2 JK |
506 | static void |
507 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
92e68195 JK |
508 | struct nfp_net_r_vector *r_vec, unsigned int idx, |
509 | bool is_xdp) | |
4c352362 | 510 | { |
4c352362 JK |
511 | struct nfp_net *nn = r_vec->nfp_net; |
512 | ||
d79737c2 JK |
513 | tx_ring->idx = idx; |
514 | tx_ring->r_vec = r_vec; | |
92e68195 | 515 | tx_ring->is_xdp = is_xdp; |
7ceb781a | 516 | u64_stats_init(&tx_ring->r_vec->tx_sync); |
d79737c2 | 517 | |
4c352362 JK |
518 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
519 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
520 | } | |
521 | ||
522 | /** | |
523 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
524 | * @rx_ring: RX ring structure | |
d79737c2 JK |
525 | * @r_vec: IRQ vector servicing this ring |
526 | * @idx: Ring index | |
4c352362 | 527 | */ |
d79737c2 JK |
528 | static void |
529 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
530 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 531 | { |
4c352362 JK |
532 | struct nfp_net *nn = r_vec->nfp_net; |
533 | ||
d79737c2 JK |
534 | rx_ring->idx = idx; |
535 | rx_ring->r_vec = r_vec; | |
7ceb781a | 536 | u64_stats_init(&rx_ring->r_vec->rx_sync); |
d79737c2 | 537 | |
4c352362 | 538 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
4c352362 | 539 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); |
4c352362 JK |
540 | } |
541 | ||
4c352362 JK |
542 | /** |
543 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
544 | * @nn: NFP Network structure | |
545 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
546 | * @format: printf-style format to construct the interrupt name | |
547 | * @name: Pointer to allocated space for interrupt name | |
548 | * @name_sz: Size of space for interrupt name | |
549 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
550 | * @handler: IRQ handler to register for this interrupt | |
551 | */ | |
552 | static int | |
553 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
554 | const char *format, char *name, size_t name_sz, | |
555 | unsigned int vector_idx, irq_handler_t handler) | |
556 | { | |
557 | struct msix_entry *entry; | |
558 | int err; | |
559 | ||
560 | entry = &nn->irq_entries[vector_idx]; | |
561 | ||
77ece8d5 | 562 | snprintf(name, name_sz, format, nfp_net_name(nn)); |
4c352362 JK |
563 | err = request_irq(entry->vector, handler, 0, name, nn); |
564 | if (err) { | |
565 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
566 | entry->vector, err); | |
567 | return err; | |
568 | } | |
fdace6c2 | 569 | nn_writeb(nn, ctrl_offset, entry->entry); |
4c352362 JK |
570 | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /** | |
575 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
576 | * @nn: NFP Network structure | |
577 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
578 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
579 | */ | |
580 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
581 | unsigned int vector_idx) | |
582 | { | |
583 | nn_writeb(nn, ctrl_offset, 0xff); | |
584 | free_irq(nn->irq_entries[vector_idx].vector, nn); | |
585 | } | |
586 | ||
587 | /* Transmit | |
588 | * | |
589 | * One queue controller peripheral queue is used for transmit. The | |
590 | * driver en-queues packets for transmit by advancing the write | |
591 | * pointer. The device indicates that packets have transmitted by | |
592 | * advancing the read pointer. The driver maintains a local copy of | |
593 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
594 | * keeps @wr_p in sync with the queue controller write pointer and can | |
595 | * determine how many packets have been transmitted by comparing its | |
596 | * copy of the read pointer @rd_p with the read pointer maintained by | |
597 | * the queue controller peripheral. | |
598 | */ | |
599 | ||
600 | /** | |
601 | * nfp_net_tx_full() - Check if the TX ring is full | |
602 | * @tx_ring: TX ring to check | |
603 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
604 | * | |
605 | * This function checks, based on the *host copy* of read/write | |
606 | * pointer if a given TX ring is full. The real TX queue may have | |
607 | * some newly made available slots. | |
608 | * | |
609 | * Return: True if the ring is full. | |
610 | */ | |
fa95f1d2 | 611 | static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) |
4c352362 JK |
612 | { |
613 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
614 | } | |
615 | ||
616 | /* Wrappers for deciding when to stop and restart TX queues */ | |
617 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
618 | { | |
619 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
620 | } | |
621 | ||
622 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
623 | { | |
624 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
625 | } | |
626 | ||
627 | /** | |
628 | * nfp_net_tx_ring_stop() - stop tx ring | |
629 | * @nd_q: netdev queue | |
630 | * @tx_ring: driver tx queue structure | |
631 | * | |
632 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
633 | * someone else may be cleaning the TX ring completions so we need to be | |
634 | * extra careful here. | |
635 | */ | |
636 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
637 | struct nfp_net_tx_ring *tx_ring) | |
638 | { | |
639 | netif_tx_stop_queue(nd_q); | |
640 | ||
641 | /* We can race with the TX completion out of NAPI so recheck */ | |
642 | smp_mb(); | |
643 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
644 | netif_tx_start_queue(nd_q); | |
645 | } | |
646 | ||
647 | /** | |
648 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
4c352362 JK |
649 | * @r_vec: per-ring structure |
650 | * @txbuf: Pointer to driver soft TX descriptor | |
651 | * @txd: Pointer to HW TX descriptor | |
652 | * @skb: Pointer to SKB | |
653 | * | |
654 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
655 | * Return error on packet header greater than maximum supported LSO header size. | |
656 | */ | |
79c12a75 | 657 | static void nfp_net_tx_tso(struct nfp_net_r_vector *r_vec, |
4c352362 JK |
658 | struct nfp_net_tx_buf *txbuf, |
659 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
660 | { | |
661 | u32 hdrlen; | |
662 | u16 mss; | |
663 | ||
664 | if (!skb_is_gso(skb)) | |
665 | return; | |
666 | ||
28063be6 EP |
667 | if (!skb->encapsulation) { |
668 | txd->l3_offset = skb_network_offset(skb); | |
669 | txd->l4_offset = skb_transport_offset(skb); | |
4c352362 | 670 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); |
28063be6 EP |
671 | } else { |
672 | txd->l3_offset = skb_inner_network_offset(skb); | |
673 | txd->l4_offset = skb_inner_transport_offset(skb); | |
4c352362 JK |
674 | hdrlen = skb_inner_transport_header(skb) - skb->data + |
675 | inner_tcp_hdrlen(skb); | |
28063be6 | 676 | } |
4c352362 JK |
677 | |
678 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
679 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
680 | ||
681 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
e53fc9fa | 682 | txd->lso_hdrlen = hdrlen; |
4c352362 JK |
683 | txd->mss = cpu_to_le16(mss); |
684 | txd->flags |= PCIE_DESC_TX_LSO; | |
685 | ||
686 | u64_stats_update_begin(&r_vec->tx_sync); | |
687 | r_vec->tx_lso++; | |
688 | u64_stats_update_end(&r_vec->tx_sync); | |
689 | } | |
690 | ||
691 | /** | |
692 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
79c12a75 | 693 | * @dp: NFP Net data path struct |
4c352362 JK |
694 | * @r_vec: per-ring structure |
695 | * @txbuf: Pointer to driver soft TX descriptor | |
696 | * @txd: Pointer to TX descriptor | |
697 | * @skb: Pointer to SKB | |
698 | * | |
699 | * This function sets the TX checksum flags in the TX descriptor based | |
700 | * on the configuration and the protocol of the packet to be transmitted. | |
701 | */ | |
79c12a75 JK |
702 | static void nfp_net_tx_csum(struct nfp_net_dp *dp, |
703 | struct nfp_net_r_vector *r_vec, | |
4c352362 JK |
704 | struct nfp_net_tx_buf *txbuf, |
705 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
706 | { | |
707 | struct ipv6hdr *ipv6h; | |
708 | struct iphdr *iph; | |
709 | u8 l4_hdr; | |
710 | ||
79c12a75 | 711 | if (!(dp->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) |
4c352362 JK |
712 | return; |
713 | ||
714 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
715 | return; | |
716 | ||
717 | txd->flags |= PCIE_DESC_TX_CSUM; | |
718 | if (skb->encapsulation) | |
719 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
720 | ||
721 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
722 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
723 | ||
724 | if (iph->version == 4) { | |
725 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
726 | l4_hdr = iph->protocol; | |
727 | } else if (ipv6h->version == 6) { | |
728 | l4_hdr = ipv6h->nexthdr; | |
729 | } else { | |
79c12a75 | 730 | nn_dp_warn(dp, "partial checksum but ipv=%x!\n", iph->version); |
4c352362 JK |
731 | return; |
732 | } | |
733 | ||
734 | switch (l4_hdr) { | |
735 | case IPPROTO_TCP: | |
736 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
737 | break; | |
738 | case IPPROTO_UDP: | |
739 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
740 | break; | |
741 | default: | |
79c12a75 | 742 | nn_dp_warn(dp, "partial checksum but l4 proto=%x!\n", l4_hdr); |
4c352362 JK |
743 | return; |
744 | } | |
745 | ||
746 | u64_stats_update_begin(&r_vec->tx_sync); | |
747 | if (skb->encapsulation) | |
748 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
749 | else | |
750 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
751 | u64_stats_update_end(&r_vec->tx_sync); | |
752 | } | |
753 | ||
ecd63a02 JK |
754 | static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) |
755 | { | |
756 | wmb(); | |
757 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
758 | tx_ring->wr_ptr_add = 0; | |
759 | } | |
760 | ||
91bf82ca SH |
761 | static int nfp_net_prep_port_id(struct sk_buff *skb) |
762 | { | |
763 | struct metadata_dst *md_dst = skb_metadata_dst(skb); | |
764 | unsigned char *data; | |
765 | ||
766 | if (likely(!md_dst)) | |
767 | return 0; | |
768 | if (unlikely(md_dst->type != METADATA_HW_PORT_MUX)) | |
769 | return 0; | |
770 | ||
771 | if (unlikely(skb_cow_head(skb, 8))) | |
772 | return -ENOMEM; | |
773 | ||
774 | data = skb_push(skb, 8); | |
775 | put_unaligned_be32(NFP_NET_META_PORTID, data); | |
776 | put_unaligned_be32(md_dst->u.port_info.port_id, data + 4); | |
777 | ||
778 | return 8; | |
779 | } | |
780 | ||
4c352362 JK |
781 | /** |
782 | * nfp_net_tx() - Main transmit entry point | |
783 | * @skb: SKB to transmit | |
784 | * @netdev: netdev structure | |
785 | * | |
786 | * Return: NETDEV_TX_OK on success. | |
787 | */ | |
788 | static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) | |
789 | { | |
790 | struct nfp_net *nn = netdev_priv(netdev); | |
791 | const struct skb_frag_struct *frag; | |
4c352362 | 792 | struct nfp_net_tx_desc *txd, txdg; |
91bf82ca | 793 | int f, nr_frags, wr_idx, md_bytes; |
4c352362 | 794 | struct nfp_net_tx_ring *tx_ring; |
bef6b1b7 JK |
795 | struct nfp_net_r_vector *r_vec; |
796 | struct nfp_net_tx_buf *txbuf; | |
4c352362 | 797 | struct netdev_queue *nd_q; |
79c12a75 | 798 | struct nfp_net_dp *dp; |
4c352362 JK |
799 | dma_addr_t dma_addr; |
800 | unsigned int fsize; | |
4c352362 JK |
801 | u16 qidx; |
802 | ||
79c12a75 | 803 | dp = &nn->dp; |
4c352362 | 804 | qidx = skb_get_queue_mapping(skb); |
79c12a75 | 805 | tx_ring = &dp->tx_rings[qidx]; |
4c352362 | 806 | r_vec = tx_ring->r_vec; |
79c12a75 | 807 | nd_q = netdev_get_tx_queue(dp->netdev, qidx); |
4c352362 JK |
808 | |
809 | nr_frags = skb_shinfo(skb)->nr_frags; | |
810 | ||
811 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
79c12a75 JK |
812 | nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n", |
813 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
4c352362 | 814 | netif_tx_stop_queue(nd_q); |
28b0cfee | 815 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
816 | u64_stats_update_begin(&r_vec->tx_sync); |
817 | r_vec->tx_busy++; | |
818 | u64_stats_update_end(&r_vec->tx_sync); | |
819 | return NETDEV_TX_BUSY; | |
820 | } | |
821 | ||
91bf82ca SH |
822 | md_bytes = nfp_net_prep_port_id(skb); |
823 | if (unlikely(md_bytes < 0)) { | |
824 | nfp_net_tx_xmit_more_flush(tx_ring); | |
825 | dev_kfree_skb_any(skb); | |
826 | return NETDEV_TX_OK; | |
827 | } | |
828 | ||
4c352362 | 829 | /* Start with the head skbuf */ |
79c12a75 | 830 | dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), |
4c352362 | 831 | DMA_TO_DEVICE); |
79c12a75 | 832 | if (dma_mapping_error(dp->dev, dma_addr)) |
4c352362 JK |
833 | goto err_free; |
834 | ||
4aa3b766 | 835 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
4c352362 JK |
836 | |
837 | /* Stash the soft descriptor of the head then initialize it */ | |
838 | txbuf = &tx_ring->txbufs[wr_idx]; | |
839 | txbuf->skb = skb; | |
840 | txbuf->dma_addr = dma_addr; | |
841 | txbuf->fidx = -1; | |
842 | txbuf->pkt_cnt = 1; | |
843 | txbuf->real_len = skb->len; | |
844 | ||
845 | /* Build TX descriptor */ | |
846 | txd = &tx_ring->txds[wr_idx]; | |
91bf82ca | 847 | txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes; |
4c352362 JK |
848 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); |
849 | nfp_desc_set_dma_addr(txd, dma_addr); | |
850 | txd->data_len = cpu_to_le16(skb->len); | |
851 | ||
852 | txd->flags = 0; | |
853 | txd->mss = 0; | |
e53fc9fa | 854 | txd->lso_hdrlen = 0; |
4c352362 | 855 | |
28063be6 | 856 | /* Do not reorder - tso may adjust pkt cnt, vlan may override fields */ |
79c12a75 | 857 | nfp_net_tx_tso(r_vec, txbuf, txd, skb); |
79c12a75 | 858 | nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb); |
79c12a75 | 859 | if (skb_vlan_tag_present(skb) && dp->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { |
4c352362 JK |
860 | txd->flags |= PCIE_DESC_TX_VLAN; |
861 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
862 | } | |
863 | ||
864 | /* Gather DMA */ | |
865 | if (nr_frags > 0) { | |
866 | /* all descs must match except for in addr, length and eop */ | |
867 | txdg = *txd; | |
868 | ||
869 | for (f = 0; f < nr_frags; f++) { | |
870 | frag = &skb_shinfo(skb)->frags[f]; | |
871 | fsize = skb_frag_size(frag); | |
872 | ||
79c12a75 | 873 | dma_addr = skb_frag_dma_map(dp->dev, frag, 0, |
4c352362 | 874 | fsize, DMA_TO_DEVICE); |
79c12a75 | 875 | if (dma_mapping_error(dp->dev, dma_addr)) |
4c352362 JK |
876 | goto err_unmap; |
877 | ||
4aa3b766 | 878 | wr_idx = D_IDX(tx_ring, wr_idx + 1); |
4c352362 JK |
879 | tx_ring->txbufs[wr_idx].skb = skb; |
880 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
881 | tx_ring->txbufs[wr_idx].fidx = f; | |
882 | ||
883 | txd = &tx_ring->txds[wr_idx]; | |
884 | *txd = txdg; | |
885 | txd->dma_len = cpu_to_le16(fsize); | |
886 | nfp_desc_set_dma_addr(txd, dma_addr); | |
91bf82ca | 887 | txd->offset_eop |= |
4c352362 JK |
888 | (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; |
889 | } | |
890 | ||
891 | u64_stats_update_begin(&r_vec->tx_sync); | |
892 | r_vec->tx_gather++; | |
893 | u64_stats_update_end(&r_vec->tx_sync); | |
894 | } | |
895 | ||
896 | netdev_tx_sent_queue(nd_q, txbuf->real_len); | |
897 | ||
46f1c52e JK |
898 | skb_tx_timestamp(skb); |
899 | ||
4c352362 JK |
900 | tx_ring->wr_p += nr_frags + 1; |
901 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
902 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
903 | ||
904 | tx_ring->wr_ptr_add += nr_frags + 1; | |
ecd63a02 JK |
905 | if (!skb->xmit_more || netif_xmit_stopped(nd_q)) |
906 | nfp_net_tx_xmit_more_flush(tx_ring); | |
4c352362 | 907 | |
4c352362 JK |
908 | return NETDEV_TX_OK; |
909 | ||
910 | err_unmap: | |
eac2c68d | 911 | while (--f >= 0) { |
4c352362 | 912 | frag = &skb_shinfo(skb)->frags[f]; |
79c12a75 | 913 | dma_unmap_page(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
914 | skb_frag_size(frag), DMA_TO_DEVICE); |
915 | tx_ring->txbufs[wr_idx].skb = NULL; | |
916 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
917 | tx_ring->txbufs[wr_idx].fidx = -2; | |
918 | wr_idx = wr_idx - 1; | |
919 | if (wr_idx < 0) | |
920 | wr_idx += tx_ring->cnt; | |
921 | } | |
79c12a75 | 922 | dma_unmap_single(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
923 | skb_headlen(skb), DMA_TO_DEVICE); |
924 | tx_ring->txbufs[wr_idx].skb = NULL; | |
925 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
926 | tx_ring->txbufs[wr_idx].fidx = -2; | |
927 | err_free: | |
79c12a75 | 928 | nn_dp_warn(dp, "Failed to map DMA TX buffer\n"); |
28b0cfee | 929 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
930 | u64_stats_update_begin(&r_vec->tx_sync); |
931 | r_vec->tx_errors++; | |
932 | u64_stats_update_end(&r_vec->tx_sync); | |
933 | dev_kfree_skb_any(skb); | |
934 | return NETDEV_TX_OK; | |
935 | } | |
936 | ||
937 | /** | |
938 | * nfp_net_tx_complete() - Handled completed TX packets | |
939 | * @tx_ring: TX ring structure | |
940 | * | |
941 | * Return: Number of completed TX descriptors | |
942 | */ | |
943 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) | |
944 | { | |
945 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 946 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 JK |
947 | const struct skb_frag_struct *frag; |
948 | struct netdev_queue *nd_q; | |
949 | u32 done_pkts = 0, done_bytes = 0; | |
950 | struct sk_buff *skb; | |
951 | int todo, nr_frags; | |
952 | u32 qcp_rd_p; | |
953 | int fidx; | |
954 | int idx; | |
955 | ||
d38df0d3 JK |
956 | if (tx_ring->wr_p == tx_ring->rd_p) |
957 | return; | |
958 | ||
4c352362 JK |
959 | /* Work out how many descriptors have been transmitted */ |
960 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
961 | ||
962 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
963 | return; | |
964 | ||
770f0cea | 965 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
4c352362 JK |
966 | |
967 | while (todo--) { | |
4aa3b766 | 968 | idx = D_IDX(tx_ring, tx_ring->rd_p++); |
4c352362 JK |
969 | |
970 | skb = tx_ring->txbufs[idx].skb; | |
971 | if (!skb) | |
972 | continue; | |
973 | ||
974 | nr_frags = skb_shinfo(skb)->nr_frags; | |
975 | fidx = tx_ring->txbufs[idx].fidx; | |
976 | ||
977 | if (fidx == -1) { | |
978 | /* unmap head */ | |
79c12a75 | 979 | dma_unmap_single(dp->dev, tx_ring->txbufs[idx].dma_addr, |
4c352362 JK |
980 | skb_headlen(skb), DMA_TO_DEVICE); |
981 | ||
982 | done_pkts += tx_ring->txbufs[idx].pkt_cnt; | |
983 | done_bytes += tx_ring->txbufs[idx].real_len; | |
984 | } else { | |
985 | /* unmap fragment */ | |
986 | frag = &skb_shinfo(skb)->frags[fidx]; | |
79c12a75 | 987 | dma_unmap_page(dp->dev, tx_ring->txbufs[idx].dma_addr, |
4c352362 JK |
988 | skb_frag_size(frag), DMA_TO_DEVICE); |
989 | } | |
990 | ||
991 | /* check for last gather fragment */ | |
992 | if (fidx == nr_frags - 1) | |
993 | dev_kfree_skb_any(skb); | |
994 | ||
995 | tx_ring->txbufs[idx].dma_addr = 0; | |
996 | tx_ring->txbufs[idx].skb = NULL; | |
997 | tx_ring->txbufs[idx].fidx = -2; | |
998 | } | |
999 | ||
1000 | tx_ring->qcp_rd_p = qcp_rd_p; | |
1001 | ||
1002 | u64_stats_update_begin(&r_vec->tx_sync); | |
1003 | r_vec->tx_bytes += done_bytes; | |
1004 | r_vec->tx_pkts += done_pkts; | |
1005 | u64_stats_update_end(&r_vec->tx_sync); | |
1006 | ||
77ece8d5 JK |
1007 | if (!dp->netdev) |
1008 | return; | |
1009 | ||
79c12a75 | 1010 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
1011 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); |
1012 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
1013 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
1014 | smp_mb(); | |
1015 | ||
1016 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
1017 | netif_tx_wake_queue(nd_q); | |
1018 | } | |
1019 | ||
1020 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
1021 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
1022 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
1023 | } | |
1024 | ||
abeeec4a | 1025 | static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring) |
ecd63a02 JK |
1026 | { |
1027 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
ecd63a02 | 1028 | u32 done_pkts = 0, done_bytes = 0; |
abeeec4a | 1029 | bool done_all; |
ecd63a02 JK |
1030 | int idx, todo; |
1031 | u32 qcp_rd_p; | |
1032 | ||
1033 | /* Work out how many descriptors have been transmitted */ | |
1034 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
1035 | ||
1036 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
abeeec4a | 1037 | return true; |
ecd63a02 | 1038 | |
770f0cea | 1039 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
ecd63a02 | 1040 | |
abeeec4a JK |
1041 | done_all = todo <= NFP_NET_XDP_MAX_COMPLETE; |
1042 | todo = min(todo, NFP_NET_XDP_MAX_COMPLETE); | |
1043 | ||
4aa3b766 | 1044 | tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo); |
abeeec4a | 1045 | |
92e68195 | 1046 | done_pkts = todo; |
ecd63a02 | 1047 | while (todo--) { |
4aa3b766 | 1048 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 JK |
1049 | tx_ring->rd_p++; |
1050 | ||
ecd63a02 | 1051 | done_bytes += tx_ring->txbufs[idx].real_len; |
ecd63a02 JK |
1052 | } |
1053 | ||
ecd63a02 JK |
1054 | u64_stats_update_begin(&r_vec->tx_sync); |
1055 | r_vec->tx_bytes += done_bytes; | |
1056 | r_vec->tx_pkts += done_pkts; | |
1057 | u64_stats_update_end(&r_vec->tx_sync); | |
1058 | ||
1059 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
abeeec4a | 1060 | "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", |
ecd63a02 | 1061 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); |
abeeec4a JK |
1062 | |
1063 | return done_all; | |
ecd63a02 JK |
1064 | } |
1065 | ||
4c352362 | 1066 | /** |
827deea9 | 1067 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
79c12a75 | 1068 | * @dp: NFP Net data path struct |
827deea9 | 1069 | * @tx_ring: TX ring structure |
4c352362 JK |
1070 | * |
1071 | * Assumes that the device is stopped | |
1072 | */ | |
827deea9 | 1073 | static void |
79c12a75 | 1074 | nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 | 1075 | { |
4c352362 | 1076 | const struct skb_frag_struct *frag; |
ecd63a02 | 1077 | struct netdev_queue *nd_q; |
4c352362 | 1078 | |
92e68195 | 1079 | while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) { |
ecd63a02 | 1080 | struct nfp_net_tx_buf *tx_buf; |
92e68195 JK |
1081 | struct sk_buff *skb; |
1082 | int idx, nr_frags; | |
4c352362 | 1083 | |
4aa3b766 | 1084 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 | 1085 | tx_buf = &tx_ring->txbufs[idx]; |
827deea9 | 1086 | |
92e68195 JK |
1087 | skb = tx_ring->txbufs[idx].skb; |
1088 | nr_frags = skb_shinfo(skb)->nr_frags; | |
4c352362 | 1089 | |
92e68195 JK |
1090 | if (tx_buf->fidx == -1) { |
1091 | /* unmap head */ | |
1092 | dma_unmap_single(dp->dev, tx_buf->dma_addr, | |
1093 | skb_headlen(skb), DMA_TO_DEVICE); | |
1094 | } else { | |
1095 | /* unmap fragment */ | |
1096 | frag = &skb_shinfo(skb)->frags[tx_buf->fidx]; | |
1097 | dma_unmap_page(dp->dev, tx_buf->dma_addr, | |
1098 | skb_frag_size(frag), DMA_TO_DEVICE); | |
ecd63a02 | 1099 | } |
827deea9 | 1100 | |
92e68195 JK |
1101 | /* check for last gather fragment */ |
1102 | if (tx_buf->fidx == nr_frags - 1) | |
1103 | dev_kfree_skb_any(skb); | |
1104 | ||
ecd63a02 JK |
1105 | tx_buf->dma_addr = 0; |
1106 | tx_buf->skb = NULL; | |
1107 | tx_buf->fidx = -2; | |
4c352362 JK |
1108 | |
1109 | tx_ring->qcp_rd_p++; | |
1110 | tx_ring->rd_p++; | |
1111 | } | |
1112 | ||
827deea9 JK |
1113 | memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt); |
1114 | tx_ring->wr_p = 0; | |
1115 | tx_ring->rd_p = 0; | |
1116 | tx_ring->qcp_rd_p = 0; | |
1117 | tx_ring->wr_ptr_add = 0; | |
1118 | ||
77ece8d5 | 1119 | if (tx_ring->is_xdp || !dp->netdev) |
ecd63a02 JK |
1120 | return; |
1121 | ||
79c12a75 | 1122 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
1123 | netdev_tx_reset_queue(nd_q); |
1124 | } | |
1125 | ||
1126 | static void nfp_net_tx_timeout(struct net_device *netdev) | |
1127 | { | |
1128 | struct nfp_net *nn = netdev_priv(netdev); | |
1129 | int i; | |
1130 | ||
79c12a75 | 1131 | for (i = 0; i < nn->dp.netdev->real_num_tx_queues; i++) { |
4c352362 JK |
1132 | if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) |
1133 | continue; | |
1134 | nn_warn(nn, "TX timeout on ring: %d\n", i); | |
1135 | } | |
1136 | nn_warn(nn, "TX watchdog timeout\n"); | |
1137 | } | |
1138 | ||
1139 | /* Receive processing | |
1140 | */ | |
bf187ea0 | 1141 | static unsigned int |
76e1e1a8 | 1142 | nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) |
bf187ea0 JK |
1143 | { |
1144 | unsigned int fl_bufsz; | |
1145 | ||
c0f031bc | 1146 | fl_bufsz = NFP_NET_RX_BUF_HEADROOM; |
6fe0c3b4 | 1147 | fl_bufsz += dp->rx_dma_off; |
79c12a75 | 1148 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
c0f031bc | 1149 | fl_bufsz += NFP_NET_MAX_PREPEND; |
bf187ea0 | 1150 | else |
79c12a75 | 1151 | fl_bufsz += dp->rx_offset; |
76e1e1a8 | 1152 | fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu; |
bf187ea0 | 1153 | |
c0f031bc JK |
1154 | fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); |
1155 | fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
1156 | ||
bf187ea0 JK |
1157 | return fl_bufsz; |
1158 | } | |
4c352362 | 1159 | |
ecd63a02 JK |
1160 | static void |
1161 | nfp_net_free_frag(void *frag, bool xdp) | |
1162 | { | |
1163 | if (!xdp) | |
1164 | skb_free_frag(frag); | |
1165 | else | |
1166 | __free_page(virt_to_page(frag)); | |
1167 | } | |
1168 | ||
4c352362 | 1169 | /** |
c0f031bc | 1170 | * nfp_net_rx_alloc_one() - Allocate and map page frag for RX |
783496b0 | 1171 | * @dp: NFP Net data path struct |
4c352362 JK |
1172 | * @dma_addr: Pointer to storage for DMA address (output param) |
1173 | * | |
c0f031bc | 1174 | * This function will allcate a new page frag, map it for DMA. |
4c352362 | 1175 | * |
c0f031bc | 1176 | * Return: allocated page frag or NULL on failure. |
4c352362 | 1177 | */ |
d78005a5 | 1178 | static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
4c352362 | 1179 | { |
c0f031bc | 1180 | void *frag; |
4c352362 | 1181 | |
9dc6b116 | 1182 | if (!dp->xdp_prog) |
2195c263 | 1183 | frag = netdev_alloc_frag(dp->fl_bufsz); |
ecd63a02 JK |
1184 | else |
1185 | frag = page_address(alloc_page(GFP_KERNEL | __GFP_COLD)); | |
c0f031bc | 1186 | if (!frag) { |
79c12a75 | 1187 | nn_dp_warn(dp, "Failed to alloc receive page frag\n"); |
4c352362 JK |
1188 | return NULL; |
1189 | } | |
1190 | ||
c487e6b1 | 1191 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 | 1192 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
9dc6b116 | 1193 | nfp_net_free_frag(frag, dp->xdp_prog); |
79c12a75 | 1194 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); |
4c352362 JK |
1195 | return NULL; |
1196 | } | |
1197 | ||
c0f031bc | 1198 | return frag; |
4c352362 JK |
1199 | } |
1200 | ||
c487e6b1 | 1201 | static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
b64b7bb6 JK |
1202 | { |
1203 | void *frag; | |
1204 | ||
79c12a75 JK |
1205 | if (!dp->xdp_prog) |
1206 | frag = napi_alloc_frag(dp->fl_bufsz); | |
ecd63a02 JK |
1207 | else |
1208 | frag = page_address(alloc_page(GFP_ATOMIC | __GFP_COLD)); | |
b64b7bb6 | 1209 | if (!frag) { |
79c12a75 | 1210 | nn_dp_warn(dp, "Failed to alloc receive page frag\n"); |
b64b7bb6 JK |
1211 | return NULL; |
1212 | } | |
1213 | ||
c487e6b1 | 1214 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 JK |
1215 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
1216 | nfp_net_free_frag(frag, dp->xdp_prog); | |
1217 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); | |
b64b7bb6 JK |
1218 | return NULL; |
1219 | } | |
1220 | ||
1221 | return frag; | |
1222 | } | |
1223 | ||
4c352362 JK |
1224 | /** |
1225 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
6fe0c3b4 | 1226 | * @dp: NFP Net data path struct |
4c352362 | 1227 | * @rx_ring: RX ring structure |
c0f031bc | 1228 | * @frag: page fragment buffer |
4c352362 JK |
1229 | * @dma_addr: DMA address of skb mapping |
1230 | */ | |
6fe0c3b4 JK |
1231 | static void nfp_net_rx_give_one(const struct nfp_net_dp *dp, |
1232 | struct nfp_net_rx_ring *rx_ring, | |
c0f031bc | 1233 | void *frag, dma_addr_t dma_addr) |
4c352362 JK |
1234 | { |
1235 | unsigned int wr_idx; | |
1236 | ||
4aa3b766 | 1237 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
4c352362 | 1238 | |
5cd4fbea JK |
1239 | nfp_net_dma_sync_dev_rx(dp, dma_addr); |
1240 | ||
4c352362 | 1241 | /* Stash SKB and DMA address away */ |
c0f031bc | 1242 | rx_ring->rxbufs[wr_idx].frag = frag; |
4c352362 JK |
1243 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; |
1244 | ||
1245 | /* Fill freelist descriptor */ | |
1246 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1247 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
6fe0c3b4 JK |
1248 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, |
1249 | dma_addr + dp->rx_dma_off); | |
4c352362 JK |
1250 | |
1251 | rx_ring->wr_p++; | |
9ed9ea70 | 1252 | if (!(rx_ring->wr_p % NFP_NET_FL_BATCH)) { |
4c352362 JK |
1253 | /* Update write pointer of the freelist queue. Make |
1254 | * sure all writes are flushed before telling the hardware. | |
1255 | */ | |
1256 | wmb(); | |
9ed9ea70 | 1257 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, NFP_NET_FL_BATCH); |
4c352362 JK |
1258 | } |
1259 | } | |
1260 | ||
1261 | /** | |
1934680f JK |
1262 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1263 | * @rx_ring: RX ring structure | |
4c352362 | 1264 | * |
1934680f JK |
1265 | * Warning: Do *not* call if ring buffers were never put on the FW freelist |
1266 | * (i.e. device was not enabled)! | |
4c352362 | 1267 | */ |
1934680f | 1268 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1269 | { |
1934680f | 1270 | unsigned int wr_idx, last_idx; |
4c352362 | 1271 | |
1934680f | 1272 | /* Move the empty entry to the end of the list */ |
4aa3b766 | 1273 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
1934680f JK |
1274 | last_idx = rx_ring->cnt - 1; |
1275 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
c0f031bc | 1276 | rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag; |
1934680f | 1277 | rx_ring->rxbufs[last_idx].dma_addr = 0; |
c0f031bc | 1278 | rx_ring->rxbufs[last_idx].frag = NULL; |
4c352362 | 1279 | |
1934680f JK |
1280 | memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt); |
1281 | rx_ring->wr_p = 0; | |
1282 | rx_ring->rd_p = 0; | |
1934680f | 1283 | } |
4c352362 | 1284 | |
1934680f JK |
1285 | /** |
1286 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
79c12a75 | 1287 | * @dp: NFP Net data path struct |
1934680f JK |
1288 | * @rx_ring: RX ring to remove buffers from |
1289 | * | |
1290 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1291 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1292 | * to restore required ring geometry. | |
1293 | */ | |
1294 | static void | |
79c12a75 | 1295 | nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, |
9dc6b116 | 1296 | struct nfp_net_rx_ring *rx_ring) |
1934680f | 1297 | { |
1934680f | 1298 | unsigned int i; |
4c352362 | 1299 | |
1934680f JK |
1300 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1301 | /* NULL skb can only happen when initial filling of the ring | |
1302 | * fails to allocate enough buffers and calls here to free | |
1303 | * already allocated ones. | |
1304 | */ | |
c0f031bc | 1305 | if (!rx_ring->rxbufs[i].frag) |
1934680f JK |
1306 | continue; |
1307 | ||
c487e6b1 | 1308 | nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr); |
9dc6b116 | 1309 | nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog); |
1934680f | 1310 | rx_ring->rxbufs[i].dma_addr = 0; |
c0f031bc | 1311 | rx_ring->rxbufs[i].frag = NULL; |
4c352362 JK |
1312 | } |
1313 | } | |
1314 | ||
1315 | /** | |
1934680f | 1316 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
79c12a75 | 1317 | * @dp: NFP Net data path struct |
1934680f | 1318 | * @rx_ring: RX ring to remove buffers from |
4c352362 | 1319 | */ |
1934680f | 1320 | static int |
79c12a75 | 1321 | nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, |
9dc6b116 | 1322 | struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1323 | { |
1934680f JK |
1324 | struct nfp_net_rx_buf *rxbufs; |
1325 | unsigned int i; | |
1326 | ||
1327 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1328 | |
1934680f | 1329 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
d78005a5 | 1330 | rxbufs[i].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr); |
c0f031bc | 1331 | if (!rxbufs[i].frag) { |
9dc6b116 | 1332 | nfp_net_rx_ring_bufs_free(dp, rx_ring); |
4c352362 JK |
1333 | return -ENOMEM; |
1334 | } | |
4c352362 JK |
1335 | } |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | ||
1934680f JK |
1340 | /** |
1341 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
6fe0c3b4 | 1342 | * @dp: NFP Net data path struct |
1934680f JK |
1343 | * @rx_ring: RX ring to fill |
1344 | */ | |
6fe0c3b4 JK |
1345 | static void |
1346 | nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp, | |
1347 | struct nfp_net_rx_ring *rx_ring) | |
1934680f JK |
1348 | { |
1349 | unsigned int i; | |
1350 | ||
1351 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
6fe0c3b4 | 1352 | nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag, |
1934680f JK |
1353 | rx_ring->rxbufs[i].dma_addr); |
1354 | } | |
1355 | ||
4c352362 JK |
1356 | /** |
1357 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1358 | * @flags: RX descriptor flags field in CPU byte order | |
1359 | */ | |
1360 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1361 | { | |
1362 | u16 csum_all_checked, csum_all_ok; | |
1363 | ||
1364 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1365 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1366 | ||
1367 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1368 | } | |
1369 | ||
1370 | /** | |
1371 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
79c12a75 | 1372 | * @dp: NFP Net data path struct |
4c352362 JK |
1373 | * @r_vec: per-ring structure |
1374 | * @rxd: Pointer to RX descriptor | |
ddb98d94 | 1375 | * @meta: Parsed metadata prepend |
4c352362 JK |
1376 | * @skb: Pointer to SKB |
1377 | */ | |
79c12a75 JK |
1378 | static void nfp_net_rx_csum(struct nfp_net_dp *dp, |
1379 | struct nfp_net_r_vector *r_vec, | |
ddb98d94 JK |
1380 | struct nfp_net_rx_desc *rxd, |
1381 | struct nfp_meta_parsed *meta, struct sk_buff *skb) | |
4c352362 JK |
1382 | { |
1383 | skb_checksum_none_assert(skb); | |
1384 | ||
79c12a75 | 1385 | if (!(dp->netdev->features & NETIF_F_RXCSUM)) |
4c352362 JK |
1386 | return; |
1387 | ||
ddb98d94 JK |
1388 | if (meta->csum_type) { |
1389 | skb->ip_summed = meta->csum_type; | |
1390 | skb->csum = meta->csum; | |
1391 | u64_stats_update_begin(&r_vec->rx_sync); | |
1392 | r_vec->hw_csum_rx_ok++; | |
1393 | u64_stats_update_end(&r_vec->rx_sync); | |
1394 | return; | |
1395 | } | |
1396 | ||
4c352362 JK |
1397 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { |
1398 | u64_stats_update_begin(&r_vec->rx_sync); | |
1399 | r_vec->hw_csum_rx_error++; | |
1400 | u64_stats_update_end(&r_vec->rx_sync); | |
1401 | return; | |
1402 | } | |
1403 | ||
1404 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1405 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1406 | * checksum as CSUM_OK. | |
1407 | */ | |
1408 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1409 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1410 | __skb_incr_checksum_unnecessary(skb); | |
1411 | u64_stats_update_begin(&r_vec->rx_sync); | |
1412 | r_vec->hw_csum_rx_ok++; | |
1413 | u64_stats_update_end(&r_vec->rx_sync); | |
1414 | } | |
1415 | ||
1416 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1417 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1418 | __skb_incr_checksum_unnecessary(skb); | |
1419 | u64_stats_update_begin(&r_vec->rx_sync); | |
1420 | r_vec->hw_csum_rx_inner_ok++; | |
1421 | u64_stats_update_end(&r_vec->rx_sync); | |
1422 | } | |
1423 | } | |
1424 | ||
e524a6a9 JK |
1425 | static void |
1426 | nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta, | |
1427 | unsigned int type, __be32 *hash) | |
4c352362 | 1428 | { |
19d0f54e | 1429 | if (!(netdev->features & NETIF_F_RXHASH)) |
4c352362 JK |
1430 | return; |
1431 | ||
19d0f54e | 1432 | switch (type) { |
4c352362 JK |
1433 | case NFP_NET_RSS_IPV4: |
1434 | case NFP_NET_RSS_IPV6: | |
1435 | case NFP_NET_RSS_IPV6_EX: | |
e524a6a9 | 1436 | meta->hash_type = PKT_HASH_TYPE_L3; |
4c352362 JK |
1437 | break; |
1438 | default: | |
e524a6a9 | 1439 | meta->hash_type = PKT_HASH_TYPE_L4; |
4c352362 JK |
1440 | break; |
1441 | } | |
e524a6a9 JK |
1442 | |
1443 | meta->hash = get_unaligned_be32(hash); | |
4c352362 JK |
1444 | } |
1445 | ||
19d0f54e | 1446 | static void |
e524a6a9 | 1447 | nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta, |
b92fb77f | 1448 | void *data, struct nfp_net_rx_desc *rxd) |
19d0f54e | 1449 | { |
b92fb77f | 1450 | struct nfp_net_rx_hash *rx_hash = data; |
19d0f54e JK |
1451 | |
1452 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) | |
1453 | return; | |
1454 | ||
e524a6a9 | 1455 | nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type), |
19d0f54e JK |
1456 | &rx_hash->hash); |
1457 | } | |
1458 | ||
1459 | static void * | |
e524a6a9 | 1460 | nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, |
b92fb77f | 1461 | void *data, int meta_len) |
19d0f54e | 1462 | { |
19d0f54e JK |
1463 | u32 meta_info; |
1464 | ||
1465 | meta_info = get_unaligned_be32(data); | |
1466 | data += 4; | |
1467 | ||
1468 | while (meta_info) { | |
1469 | switch (meta_info & NFP_NET_META_FIELD_MASK) { | |
1470 | case NFP_NET_META_HASH: | |
1471 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
e524a6a9 | 1472 | nfp_net_set_hash(netdev, meta, |
19d0f54e JK |
1473 | meta_info & NFP_NET_META_FIELD_MASK, |
1474 | (__be32 *)data); | |
1475 | data += 4; | |
1476 | break; | |
1477 | case NFP_NET_META_MARK: | |
e524a6a9 | 1478 | meta->mark = get_unaligned_be32(data); |
19d0f54e JK |
1479 | data += 4; |
1480 | break; | |
91bf82ca SH |
1481 | case NFP_NET_META_PORTID: |
1482 | meta->portid = get_unaligned_be32(data); | |
1483 | data += 4; | |
1484 | break; | |
ddb98d94 JK |
1485 | case NFP_NET_META_CSUM: |
1486 | meta->csum_type = CHECKSUM_COMPLETE; | |
1487 | meta->csum = | |
1488 | (__force __wsum)__get_unaligned_cpu32(data); | |
1489 | data += 4; | |
1490 | break; | |
19d0f54e JK |
1491 | default: |
1492 | return NULL; | |
1493 | } | |
1494 | ||
1495 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1496 | } | |
1497 | ||
1498 | return data; | |
1499 | } | |
1500 | ||
e9949aeb | 1501 | static void |
6fe0c3b4 JK |
1502 | nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, |
1503 | struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, | |
1504 | struct sk_buff *skb) | |
e9949aeb JK |
1505 | { |
1506 | u64_stats_update_begin(&r_vec->rx_sync); | |
1507 | r_vec->rx_drops++; | |
1508 | u64_stats_update_end(&r_vec->rx_sync); | |
1509 | ||
c0f031bc JK |
1510 | /* skb is build based on the frag, free_skb() would free the frag |
1511 | * so to be able to reuse it we need an extra ref. | |
1512 | */ | |
1513 | if (skb && rxbuf && skb->head == rxbuf->frag) | |
1514 | page_ref_inc(virt_to_head_page(rxbuf->frag)); | |
e9949aeb | 1515 | if (rxbuf) |
6fe0c3b4 | 1516 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr); |
e9949aeb JK |
1517 | if (skb) |
1518 | dev_kfree_skb_any(skb); | |
1519 | } | |
1520 | ||
a67edbf4 | 1521 | static bool |
79c12a75 | 1522 | nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, |
ecd63a02 | 1523 | struct nfp_net_tx_ring *tx_ring, |
1abae319 | 1524 | struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, |
abeeec4a | 1525 | unsigned int pkt_len, bool *completed) |
ecd63a02 JK |
1526 | { |
1527 | struct nfp_net_tx_buf *txbuf; | |
1528 | struct nfp_net_tx_desc *txd; | |
ecd63a02 JK |
1529 | int wr_idx; |
1530 | ||
1531 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
abeeec4a JK |
1532 | if (!*completed) { |
1533 | nfp_net_xdp_complete(tx_ring); | |
1534 | *completed = true; | |
1535 | } | |
1536 | ||
1537 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
1538 | nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf, | |
1539 | NULL); | |
1540 | return false; | |
1541 | } | |
ecd63a02 JK |
1542 | } |
1543 | ||
4aa3b766 | 1544 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
ecd63a02 JK |
1545 | |
1546 | /* Stash the soft descriptor of the head then initialize it */ | |
1547 | txbuf = &tx_ring->txbufs[wr_idx]; | |
92e68195 JK |
1548 | |
1549 | nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr); | |
1550 | ||
ecd63a02 JK |
1551 | txbuf->frag = rxbuf->frag; |
1552 | txbuf->dma_addr = rxbuf->dma_addr; | |
1553 | txbuf->fidx = -1; | |
1554 | txbuf->pkt_cnt = 1; | |
1555 | txbuf->real_len = pkt_len; | |
1556 | ||
1abae319 | 1557 | dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off, |
d58cebb7 | 1558 | pkt_len, DMA_BIDIRECTIONAL); |
ecd63a02 JK |
1559 | |
1560 | /* Build TX descriptor */ | |
1561 | txd = &tx_ring->txds[wr_idx]; | |
1562 | txd->offset_eop = PCIE_DESC_TX_EOP; | |
1563 | txd->dma_len = cpu_to_le16(pkt_len); | |
1abae319 | 1564 | nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off); |
ecd63a02 JK |
1565 | txd->data_len = cpu_to_le16(pkt_len); |
1566 | ||
1567 | txd->flags = 0; | |
1568 | txd->mss = 0; | |
e53fc9fa | 1569 | txd->lso_hdrlen = 0; |
ecd63a02 JK |
1570 | |
1571 | tx_ring->wr_p++; | |
1572 | tx_ring->wr_ptr_add++; | |
a67edbf4 | 1573 | return true; |
ecd63a02 JK |
1574 | } |
1575 | ||
6fe0c3b4 JK |
1576 | static int nfp_net_run_xdp(struct bpf_prog *prog, void *data, void *hard_start, |
1577 | unsigned int *off, unsigned int *len) | |
ecd63a02 JK |
1578 | { |
1579 | struct xdp_buff xdp; | |
6fe0c3b4 JK |
1580 | void *orig_data; |
1581 | int ret; | |
1582 | ||
1583 | xdp.data_hard_start = hard_start; | |
1584 | xdp.data = data + *off; | |
1585 | xdp.data_end = data + *off + *len; | |
ecd63a02 | 1586 | |
6fe0c3b4 JK |
1587 | orig_data = xdp.data; |
1588 | ret = bpf_prog_run_xdp(prog, &xdp); | |
ecd63a02 | 1589 | |
6fe0c3b4 JK |
1590 | *len -= xdp.data - orig_data; |
1591 | *off += xdp.data - orig_data; | |
1592 | ||
1593 | return ret; | |
ecd63a02 JK |
1594 | } |
1595 | ||
4c352362 JK |
1596 | /** |
1597 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1598 | * @rx_ring: RX ring to receive from | |
1599 | * @budget: NAPI budget | |
1600 | * | |
1601 | * Note, this function is separated out from the napi poll function to | |
1602 | * more cleanly separate packet receive code from other bookkeeping | |
1603 | * functions performed in the napi poll function. | |
1604 | * | |
4c352362 JK |
1605 | * Return: Number of packets received. |
1606 | */ | |
1607 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1608 | { | |
1609 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 1610 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
ecd63a02 JK |
1611 | struct nfp_net_tx_ring *tx_ring; |
1612 | struct bpf_prog *xdp_prog; | |
abeeec4a | 1613 | bool xdp_tx_cmpl = false; |
ecd63a02 | 1614 | unsigned int true_bufsz; |
c0f031bc | 1615 | struct sk_buff *skb; |
416db5c1 | 1616 | int pkts_polled = 0; |
4c352362 JK |
1617 | int idx; |
1618 | ||
ecd63a02 | 1619 | rcu_read_lock(); |
79c12a75 | 1620 | xdp_prog = READ_ONCE(dp->xdp_prog); |
79c12a75 | 1621 | true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; |
ecd63a02 JK |
1622 | tx_ring = r_vec->xdp_ring; |
1623 | ||
416db5c1 | 1624 | while (pkts_polled < budget) { |
5cd4fbea | 1625 | unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; |
13df4c66 JK |
1626 | struct nfp_net_rx_buf *rxbuf; |
1627 | struct nfp_net_rx_desc *rxd; | |
e524a6a9 | 1628 | struct nfp_meta_parsed meta; |
91bf82ca | 1629 | struct net_device *netdev; |
13df4c66 JK |
1630 | dma_addr_t new_dma_addr; |
1631 | void *new_frag; | |
1632 | ||
4aa3b766 | 1633 | idx = D_IDX(rx_ring, rx_ring->rd_p); |
4c352362 JK |
1634 | |
1635 | rxd = &rx_ring->rxds[idx]; | |
416db5c1 | 1636 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) |
4c352362 | 1637 | break; |
416db5c1 | 1638 | |
4c352362 JK |
1639 | /* Memory barrier to ensure that we won't do other reads |
1640 | * before the DD bit. | |
1641 | */ | |
1642 | dma_rmb(); | |
1643 | ||
e524a6a9 JK |
1644 | memset(&meta, 0, sizeof(meta)); |
1645 | ||
4c352362 JK |
1646 | rx_ring->rd_p++; |
1647 | pkts_polled++; | |
4c352362 | 1648 | |
c0f031bc | 1649 | rxbuf = &rx_ring->rxbufs[idx]; |
180012dc JK |
1650 | /* < meta_len > |
1651 | * <-- [rx_offset] --> | |
1652 | * --------------------------------------------------------- | |
1653 | * | [XX] | metadata | packet | XXXX | | |
1654 | * --------------------------------------------------------- | |
1655 | * <---------------- data_len ---------------> | |
1656 | * | |
1657 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1658 | * on a packet by packet basis. If rx_offset is set to zero | |
1659 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1660 | * buffer and is immediately followed by the packet (no [XX]). | |
1661 | */ | |
4c352362 JK |
1662 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1663 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
13df4c66 | 1664 | pkt_len = data_len - meta_len; |
4c352362 | 1665 | |
5cd4fbea | 1666 | pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; |
79c12a75 | 1667 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
5cd4fbea | 1668 | pkt_off += meta_len; |
180012dc | 1669 | else |
5cd4fbea JK |
1670 | pkt_off += dp->rx_offset; |
1671 | meta_off = pkt_off - meta_len; | |
4c352362 | 1672 | |
4c352362 JK |
1673 | /* Stats update */ |
1674 | u64_stats_update_begin(&r_vec->rx_sync); | |
1675 | r_vec->rx_pkts++; | |
13df4c66 | 1676 | r_vec->rx_bytes += pkt_len; |
4c352362 JK |
1677 | u64_stats_update_end(&r_vec->rx_sync); |
1678 | ||
b92fb77f JK |
1679 | if (unlikely(meta_len > NFP_NET_MAX_PREPEND || |
1680 | (dp->rx_offset && meta_len > dp->rx_offset))) { | |
1681 | nn_dp_warn(dp, "oversized RX packet metadata %u\n", | |
1682 | meta_len); | |
6fe0c3b4 | 1683 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
b92fb77f JK |
1684 | continue; |
1685 | } | |
1686 | ||
5cd4fbea JK |
1687 | nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, |
1688 | data_len); | |
1689 | ||
e524a6a9 JK |
1690 | if (!dp->chained_metadata_format) { |
1691 | nfp_net_set_hash_desc(dp->netdev, &meta, | |
1692 | rxbuf->frag + meta_off, rxd); | |
1693 | } else if (meta_len) { | |
1694 | void *end; | |
1695 | ||
1696 | end = nfp_net_parse_meta(dp->netdev, &meta, | |
1697 | rxbuf->frag + meta_off, | |
1698 | meta_len); | |
1699 | if (unlikely(end != rxbuf->frag + pkt_off)) { | |
1700 | nn_dp_warn(dp, "invalid RX packet metadata\n"); | |
1701 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, | |
1702 | NULL); | |
1703 | continue; | |
1704 | } | |
1705 | } | |
1706 | ||
6d677075 | 1707 | if (xdp_prog && !(rxd->rxd.flags & PCIE_DESC_RX_BPF && |
91bf82ca | 1708 | dp->bpf_offload_xdp) && !meta.portid) { |
1abae319 | 1709 | unsigned int dma_off; |
6fe0c3b4 | 1710 | void *hard_start; |
ecd63a02 JK |
1711 | int act; |
1712 | ||
6fe0c3b4 | 1713 | hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM; |
6fe0c3b4 | 1714 | |
6fe0c3b4 | 1715 | act = nfp_net_run_xdp(xdp_prog, rxbuf->frag, hard_start, |
5cd4fbea | 1716 | &pkt_off, &pkt_len); |
ecd63a02 JK |
1717 | switch (act) { |
1718 | case XDP_PASS: | |
1719 | break; | |
1720 | case XDP_TX: | |
5cd4fbea | 1721 | dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM; |
79c12a75 | 1722 | if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring, |
a67edbf4 | 1723 | tx_ring, rxbuf, |
1abae319 | 1724 | dma_off, |
abeeec4a JK |
1725 | pkt_len, |
1726 | &xdp_tx_cmpl))) | |
79c12a75 JK |
1727 | trace_xdp_exception(dp->netdev, |
1728 | xdp_prog, act); | |
ecd63a02 JK |
1729 | continue; |
1730 | default: | |
1731 | bpf_warn_invalid_xdp_action(act); | |
5c914359 | 1732 | /* fall through */ |
ecd63a02 | 1733 | case XDP_ABORTED: |
79c12a75 | 1734 | trace_xdp_exception(dp->netdev, xdp_prog, act); |
5c914359 | 1735 | /* fall through */ |
ecd63a02 | 1736 | case XDP_DROP: |
6fe0c3b4 | 1737 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, |
ecd63a02 JK |
1738 | rxbuf->dma_addr); |
1739 | continue; | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | skb = build_skb(rxbuf->frag, true_bufsz); | |
13df4c66 | 1744 | if (unlikely(!skb)) { |
6fe0c3b4 | 1745 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
13df4c66 JK |
1746 | continue; |
1747 | } | |
c487e6b1 | 1748 | new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); |
13df4c66 | 1749 | if (unlikely(!new_frag)) { |
6fe0c3b4 | 1750 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); |
13df4c66 JK |
1751 | continue; |
1752 | } | |
1753 | ||
1691a4c0 JK |
1754 | nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); |
1755 | ||
1756 | nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); | |
1757 | ||
91bf82ca SH |
1758 | if (likely(!meta.portid)) { |
1759 | netdev = dp->netdev; | |
1760 | } else { | |
1761 | struct nfp_net *nn; | |
1762 | ||
1763 | nn = netdev_priv(dp->netdev); | |
1764 | netdev = nfp_app_repr_get(nn->app, meta.portid); | |
1765 | if (unlikely(!netdev)) { | |
1691a4c0 | 1766 | nfp_net_rx_drop(dp, r_vec, rx_ring, NULL, skb); |
91bf82ca SH |
1767 | continue; |
1768 | } | |
1769 | nfp_repr_inc_rx_stats(netdev, pkt_len); | |
1770 | } | |
1771 | ||
5cd4fbea | 1772 | skb_reserve(skb, pkt_off); |
13df4c66 JK |
1773 | skb_put(skb, pkt_len); |
1774 | ||
e524a6a9 JK |
1775 | skb->mark = meta.mark; |
1776 | skb_set_hash(skb, meta.hash, meta.hash_type); | |
19d0f54e | 1777 | |
4c352362 | 1778 | skb_record_rx_queue(skb, rx_ring->idx); |
91bf82ca | 1779 | skb->protocol = eth_type_trans(skb, netdev); |
4c352362 | 1780 | |
ddb98d94 | 1781 | nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb); |
4c352362 JK |
1782 | |
1783 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) | |
1784 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
1785 | le16_to_cpu(rxd->rxd.vlan)); | |
1786 | ||
1787 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
1788 | } | |
1789 | ||
abeeec4a JK |
1790 | if (xdp_prog) { |
1791 | if (tx_ring->wr_ptr_add) | |
1792 | nfp_net_tx_xmit_more_flush(tx_ring); | |
1793 | else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) && | |
1794 | !xdp_tx_cmpl) | |
1795 | if (!nfp_net_xdp_complete(tx_ring)) | |
1796 | pkts_polled = budget; | |
1797 | } | |
ecd63a02 JK |
1798 | rcu_read_unlock(); |
1799 | ||
4c352362 JK |
1800 | return pkts_polled; |
1801 | } | |
1802 | ||
1803 | /** | |
1804 | * nfp_net_poll() - napi poll function | |
1805 | * @napi: NAPI structure | |
1806 | * @budget: NAPI budget | |
1807 | * | |
1808 | * Return: number of packets polled. | |
1809 | */ | |
1810 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
1811 | { | |
1812 | struct nfp_net_r_vector *r_vec = | |
1813 | container_of(napi, struct nfp_net_r_vector, napi); | |
cbeaf7aa | 1814 | unsigned int pkts_polled = 0; |
4c352362 | 1815 | |
cbeaf7aa JK |
1816 | if (r_vec->tx_ring) |
1817 | nfp_net_tx_complete(r_vec->tx_ring); | |
abeeec4a | 1818 | if (r_vec->rx_ring) |
cbeaf7aa | 1819 | pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); |
4c352362 | 1820 | |
7de5f115 JK |
1821 | if (pkts_polled < budget) |
1822 | if (napi_complete_done(napi, pkts_polled)) | |
1823 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); | |
4c352362 JK |
1824 | |
1825 | return pkts_polled; | |
1826 | } | |
1827 | ||
77ece8d5 JK |
1828 | /* Control device data path |
1829 | */ | |
1830 | ||
1831 | static bool | |
1832 | nfp_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
1833 | struct sk_buff *skb, bool old) | |
1834 | { | |
1835 | unsigned int real_len = skb->len, meta_len = 0; | |
1836 | struct nfp_net_tx_ring *tx_ring; | |
1837 | struct nfp_net_tx_buf *txbuf; | |
1838 | struct nfp_net_tx_desc *txd; | |
1839 | struct nfp_net_dp *dp; | |
1840 | dma_addr_t dma_addr; | |
1841 | int wr_idx; | |
1842 | ||
1843 | dp = &r_vec->nfp_net->dp; | |
1844 | tx_ring = r_vec->tx_ring; | |
1845 | ||
1846 | if (WARN_ON_ONCE(skb_shinfo(skb)->nr_frags)) { | |
1847 | nn_dp_warn(dp, "Driver's CTRL TX does not implement gather\n"); | |
1848 | goto err_free; | |
1849 | } | |
1850 | ||
1851 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
1852 | u64_stats_update_begin(&r_vec->tx_sync); | |
1853 | r_vec->tx_busy++; | |
1854 | u64_stats_update_end(&r_vec->tx_sync); | |
1855 | if (!old) | |
1856 | __skb_queue_tail(&r_vec->queue, skb); | |
1857 | else | |
1858 | __skb_queue_head(&r_vec->queue, skb); | |
1859 | return true; | |
1860 | } | |
1861 | ||
1862 | if (nfp_app_ctrl_has_meta(nn->app)) { | |
1863 | if (unlikely(skb_headroom(skb) < 8)) { | |
1864 | nn_dp_warn(dp, "CTRL TX on skb without headroom\n"); | |
1865 | goto err_free; | |
1866 | } | |
1867 | meta_len = 8; | |
1868 | put_unaligned_be32(NFP_META_PORT_ID_CTRL, skb_push(skb, 4)); | |
1869 | put_unaligned_be32(NFP_NET_META_PORTID, skb_push(skb, 4)); | |
1870 | } | |
1871 | ||
1872 | /* Start with the head skbuf */ | |
1873 | dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), | |
1874 | DMA_TO_DEVICE); | |
1875 | if (dma_mapping_error(dp->dev, dma_addr)) | |
1876 | goto err_dma_warn; | |
1877 | ||
1878 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); | |
1879 | ||
1880 | /* Stash the soft descriptor of the head then initialize it */ | |
1881 | txbuf = &tx_ring->txbufs[wr_idx]; | |
1882 | txbuf->skb = skb; | |
1883 | txbuf->dma_addr = dma_addr; | |
1884 | txbuf->fidx = -1; | |
1885 | txbuf->pkt_cnt = 1; | |
1886 | txbuf->real_len = real_len; | |
1887 | ||
1888 | /* Build TX descriptor */ | |
1889 | txd = &tx_ring->txds[wr_idx]; | |
1890 | txd->offset_eop = meta_len | PCIE_DESC_TX_EOP; | |
1891 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
1892 | nfp_desc_set_dma_addr(txd, dma_addr); | |
1893 | txd->data_len = cpu_to_le16(skb->len); | |
1894 | ||
1895 | txd->flags = 0; | |
1896 | txd->mss = 0; | |
1897 | txd->lso_hdrlen = 0; | |
1898 | ||
1899 | tx_ring->wr_p++; | |
1900 | tx_ring->wr_ptr_add++; | |
1901 | nfp_net_tx_xmit_more_flush(tx_ring); | |
1902 | ||
1903 | return false; | |
1904 | ||
1905 | err_dma_warn: | |
1906 | nn_dp_warn(dp, "Failed to DMA map TX CTRL buffer\n"); | |
1907 | err_free: | |
1908 | u64_stats_update_begin(&r_vec->tx_sync); | |
1909 | r_vec->tx_errors++; | |
1910 | u64_stats_update_end(&r_vec->tx_sync); | |
1911 | dev_kfree_skb_any(skb); | |
1912 | return false; | |
1913 | } | |
1914 | ||
1915 | bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb) | |
1916 | { | |
1917 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[0]; | |
1918 | bool ret; | |
1919 | ||
1920 | spin_lock_bh(&r_vec->lock); | |
1921 | ret = nfp_ctrl_tx_one(nn, r_vec, skb, false); | |
1922 | spin_unlock_bh(&r_vec->lock); | |
1923 | ||
1924 | return ret; | |
1925 | } | |
1926 | ||
1927 | static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector *r_vec) | |
1928 | { | |
1929 | struct sk_buff *skb; | |
1930 | ||
1931 | while ((skb = __skb_dequeue(&r_vec->queue))) | |
1932 | if (nfp_ctrl_tx_one(r_vec->nfp_net, r_vec, skb, true)) | |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | static bool | |
1937 | nfp_ctrl_meta_ok(struct nfp_net *nn, void *data, unsigned int meta_len) | |
1938 | { | |
1939 | u32 meta_type, meta_tag; | |
1940 | ||
1941 | if (!nfp_app_ctrl_has_meta(nn->app)) | |
1942 | return !meta_len; | |
1943 | ||
1944 | if (meta_len != 8) | |
1945 | return false; | |
1946 | ||
1947 | meta_type = get_unaligned_be32(data); | |
1948 | meta_tag = get_unaligned_be32(data + 4); | |
1949 | ||
1950 | return (meta_type == NFP_NET_META_PORTID && | |
1951 | meta_tag == NFP_META_PORT_ID_CTRL); | |
1952 | } | |
1953 | ||
1954 | static bool | |
1955 | nfp_ctrl_rx_one(struct nfp_net *nn, struct nfp_net_dp *dp, | |
1956 | struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring) | |
1957 | { | |
1958 | unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; | |
1959 | struct nfp_net_rx_buf *rxbuf; | |
1960 | struct nfp_net_rx_desc *rxd; | |
1961 | dma_addr_t new_dma_addr; | |
1962 | struct sk_buff *skb; | |
1963 | void *new_frag; | |
1964 | int idx; | |
1965 | ||
1966 | idx = D_IDX(rx_ring, rx_ring->rd_p); | |
1967 | ||
1968 | rxd = &rx_ring->rxds[idx]; | |
1969 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) | |
1970 | return false; | |
1971 | ||
1972 | /* Memory barrier to ensure that we won't do other reads | |
1973 | * before the DD bit. | |
1974 | */ | |
1975 | dma_rmb(); | |
1976 | ||
1977 | rx_ring->rd_p++; | |
1978 | ||
1979 | rxbuf = &rx_ring->rxbufs[idx]; | |
1980 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; | |
1981 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
1982 | pkt_len = data_len - meta_len; | |
1983 | ||
1984 | pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; | |
1985 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) | |
1986 | pkt_off += meta_len; | |
1987 | else | |
1988 | pkt_off += dp->rx_offset; | |
1989 | meta_off = pkt_off - meta_len; | |
1990 | ||
1991 | /* Stats update */ | |
1992 | u64_stats_update_begin(&r_vec->rx_sync); | |
1993 | r_vec->rx_pkts++; | |
1994 | r_vec->rx_bytes += pkt_len; | |
1995 | u64_stats_update_end(&r_vec->rx_sync); | |
1996 | ||
1997 | nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, data_len); | |
1998 | ||
1999 | if (unlikely(!nfp_ctrl_meta_ok(nn, rxbuf->frag + meta_off, meta_len))) { | |
2000 | nn_dp_warn(dp, "incorrect metadata for ctrl packet (%d)\n", | |
2001 | meta_len); | |
2002 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); | |
2003 | return true; | |
2004 | } | |
2005 | ||
2006 | skb = build_skb(rxbuf->frag, dp->fl_bufsz); | |
2007 | if (unlikely(!skb)) { | |
2008 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); | |
2009 | return true; | |
2010 | } | |
2011 | new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); | |
2012 | if (unlikely(!new_frag)) { | |
2013 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); | |
2014 | return true; | |
2015 | } | |
2016 | ||
2017 | nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); | |
2018 | ||
2019 | nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); | |
2020 | ||
2021 | skb_reserve(skb, pkt_off); | |
2022 | skb_put(skb, pkt_len); | |
2023 | ||
02082701 | 2024 | nfp_app_ctrl_rx(nn->app, skb); |
77ece8d5 JK |
2025 | |
2026 | return true; | |
2027 | } | |
2028 | ||
2029 | static void nfp_ctrl_rx(struct nfp_net_r_vector *r_vec) | |
2030 | { | |
2031 | struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; | |
2032 | struct nfp_net *nn = r_vec->nfp_net; | |
2033 | struct nfp_net_dp *dp = &nn->dp; | |
2034 | ||
2035 | while (nfp_ctrl_rx_one(nn, dp, r_vec, rx_ring)) | |
2036 | continue; | |
2037 | } | |
2038 | ||
2039 | static void nfp_ctrl_poll(unsigned long arg) | |
2040 | { | |
2041 | struct nfp_net_r_vector *r_vec = (void *)arg; | |
2042 | ||
2043 | spin_lock_bh(&r_vec->lock); | |
2044 | nfp_net_tx_complete(r_vec->tx_ring); | |
2045 | __nfp_ctrl_tx_queued(r_vec); | |
2046 | spin_unlock_bh(&r_vec->lock); | |
2047 | ||
2048 | nfp_ctrl_rx(r_vec); | |
2049 | ||
2050 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); | |
2051 | } | |
2052 | ||
4c352362 JK |
2053 | /* Setup and Configuration |
2054 | */ | |
2055 | ||
cd083ce1 JK |
2056 | /** |
2057 | * nfp_net_vecs_init() - Assign IRQs and setup rvecs. | |
2058 | * @nn: NFP Network structure | |
2059 | */ | |
2060 | static void nfp_net_vecs_init(struct nfp_net *nn) | |
2061 | { | |
2062 | struct nfp_net_r_vector *r_vec; | |
2063 | int r; | |
2064 | ||
2065 | nn->lsc_handler = nfp_net_irq_lsc; | |
2066 | nn->exn_handler = nfp_net_irq_exn; | |
2067 | ||
2068 | for (r = 0; r < nn->max_r_vecs; r++) { | |
2069 | struct msix_entry *entry; | |
2070 | ||
2071 | entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r]; | |
2072 | ||
2073 | r_vec = &nn->r_vecs[r]; | |
2074 | r_vec->nfp_net = nn; | |
cd083ce1 JK |
2075 | r_vec->irq_entry = entry->entry; |
2076 | r_vec->irq_vector = entry->vector; | |
2077 | ||
77ece8d5 JK |
2078 | if (nn->dp.netdev) { |
2079 | r_vec->handler = nfp_net_irq_rxtx; | |
2080 | } else { | |
2081 | r_vec->handler = nfp_ctrl_irq_rxtx; | |
2082 | ||
2083 | __skb_queue_head_init(&r_vec->queue); | |
2084 | spin_lock_init(&r_vec->lock); | |
2085 | tasklet_init(&r_vec->tasklet, nfp_ctrl_poll, | |
2086 | (unsigned long)r_vec); | |
2087 | tasklet_disable(&r_vec->tasklet); | |
2088 | } | |
2089 | ||
cd083ce1 JK |
2090 | cpumask_set_cpu(r, &r_vec->affinity_mask); |
2091 | } | |
2092 | } | |
2093 | ||
4c352362 JK |
2094 | /** |
2095 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
2096 | * @tx_ring: TX ring to free | |
2097 | */ | |
2098 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
2099 | { | |
2100 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 2101 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 2102 | |
4c352362 JK |
2103 | kfree(tx_ring->txbufs); |
2104 | ||
2105 | if (tx_ring->txds) | |
79c12a75 | 2106 | dma_free_coherent(dp->dev, tx_ring->size, |
4c352362 JK |
2107 | tx_ring->txds, tx_ring->dma); |
2108 | ||
2109 | tx_ring->cnt = 0; | |
4c352362 JK |
2110 | tx_ring->txbufs = NULL; |
2111 | tx_ring->txds = NULL; | |
2112 | tx_ring->dma = 0; | |
2113 | tx_ring->size = 0; | |
2114 | } | |
2115 | ||
2116 | /** | |
2117 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
892a7f70 | 2118 | * @dp: NFP Net data path struct |
4c352362 JK |
2119 | * @tx_ring: TX Ring structure to allocate |
2120 | * | |
2121 | * Return: 0 on success, negative errno otherwise. | |
2122 | */ | |
ecd63a02 | 2123 | static int |
92e68195 | 2124 | nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 JK |
2125 | { |
2126 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
4c352362 JK |
2127 | int sz; |
2128 | ||
892a7f70 | 2129 | tx_ring->cnt = dp->txd_cnt; |
4c352362 JK |
2130 | |
2131 | tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; | |
79c12a75 | 2132 | tx_ring->txds = dma_zalloc_coherent(dp->dev, tx_ring->size, |
4c352362 JK |
2133 | &tx_ring->dma, GFP_KERNEL); |
2134 | if (!tx_ring->txds) | |
2135 | goto err_alloc; | |
2136 | ||
2137 | sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; | |
2138 | tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); | |
2139 | if (!tx_ring->txbufs) | |
2140 | goto err_alloc; | |
2141 | ||
a7b1ad08 | 2142 | if (!tx_ring->is_xdp && dp->netdev) |
79c12a75 | 2143 | netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask, |
ecd63a02 | 2144 | tx_ring->idx); |
4c352362 | 2145 | |
4c352362 JK |
2146 | return 0; |
2147 | ||
2148 | err_alloc: | |
2149 | nfp_net_tx_ring_free(tx_ring); | |
2150 | return -ENOMEM; | |
2151 | } | |
2152 | ||
92e68195 JK |
2153 | static void |
2154 | nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp, | |
2155 | struct nfp_net_tx_ring *tx_ring) | |
2156 | { | |
2157 | unsigned int i; | |
2158 | ||
2159 | if (!tx_ring->is_xdp) | |
2160 | return; | |
2161 | ||
2162 | for (i = 0; i < tx_ring->cnt; i++) { | |
2163 | if (!tx_ring->txbufs[i].frag) | |
2164 | return; | |
2165 | ||
2166 | nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr); | |
2167 | __free_page(virt_to_page(tx_ring->txbufs[i].frag)); | |
2168 | } | |
2169 | } | |
2170 | ||
2171 | static int | |
2172 | nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp, | |
2173 | struct nfp_net_tx_ring *tx_ring) | |
2174 | { | |
2175 | struct nfp_net_tx_buf *txbufs = tx_ring->txbufs; | |
2176 | unsigned int i; | |
2177 | ||
2178 | if (!tx_ring->is_xdp) | |
2179 | return 0; | |
2180 | ||
2181 | for (i = 0; i < tx_ring->cnt; i++) { | |
2182 | txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr); | |
2183 | if (!txbufs[i].frag) { | |
2184 | nfp_net_tx_ring_bufs_free(dp, tx_ring); | |
2185 | return -ENOMEM; | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | return 0; | |
2190 | } | |
2191 | ||
892a7f70 | 2192 | static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
cc7c0333 | 2193 | { |
cc7c0333 JK |
2194 | unsigned int r; |
2195 | ||
892a7f70 JK |
2196 | dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings), |
2197 | GFP_KERNEL); | |
2198 | if (!dp->tx_rings) | |
2199 | return -ENOMEM; | |
cc7c0333 | 2200 | |
892a7f70 | 2201 | for (r = 0; r < dp->num_tx_rings; r++) { |
ecd63a02 JK |
2202 | int bias = 0; |
2203 | ||
512e94dc JK |
2204 | if (r >= dp->num_stack_tx_rings) |
2205 | bias = dp->num_stack_tx_rings; | |
cc7c0333 | 2206 | |
892a7f70 | 2207 | nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias], |
92e68195 | 2208 | r, bias); |
ecd63a02 | 2209 | |
92e68195 | 2210 | if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r])) |
cc7c0333 | 2211 | goto err_free_prev; |
92e68195 JK |
2212 | |
2213 | if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r])) | |
2214 | goto err_free_ring; | |
cc7c0333 JK |
2215 | } |
2216 | ||
892a7f70 | 2217 | return 0; |
cc7c0333 JK |
2218 | |
2219 | err_free_prev: | |
92e68195 JK |
2220 | while (r--) { |
2221 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
2222 | err_free_ring: | |
892a7f70 | 2223 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 2224 | } |
892a7f70 JK |
2225 | kfree(dp->tx_rings); |
2226 | return -ENOMEM; | |
cc7c0333 JK |
2227 | } |
2228 | ||
892a7f70 | 2229 | static void nfp_net_tx_rings_free(struct nfp_net_dp *dp) |
cc7c0333 JK |
2230 | { |
2231 | unsigned int r; | |
2232 | ||
92e68195 JK |
2233 | for (r = 0; r < dp->num_tx_rings; r++) { |
2234 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
892a7f70 | 2235 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 2236 | } |
cc7c0333 | 2237 | |
892a7f70 | 2238 | kfree(dp->tx_rings); |
cc7c0333 JK |
2239 | } |
2240 | ||
4c352362 JK |
2241 | /** |
2242 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
2243 | * @rx_ring: RX ring to free | |
2244 | */ | |
2245 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
2246 | { | |
2247 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 2248 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 2249 | |
4c352362 JK |
2250 | kfree(rx_ring->rxbufs); |
2251 | ||
2252 | if (rx_ring->rxds) | |
79c12a75 | 2253 | dma_free_coherent(dp->dev, rx_ring->size, |
4c352362 JK |
2254 | rx_ring->rxds, rx_ring->dma); |
2255 | ||
2256 | rx_ring->cnt = 0; | |
4c352362 JK |
2257 | rx_ring->rxbufs = NULL; |
2258 | rx_ring->rxds = NULL; | |
2259 | rx_ring->dma = 0; | |
2260 | rx_ring->size = 0; | |
2261 | } | |
2262 | ||
2263 | /** | |
2264 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
2195c263 | 2265 | * @dp: NFP Net data path struct |
4c352362 JK |
2266 | * @rx_ring: RX ring to allocate |
2267 | * | |
2268 | * Return: 0 on success, negative errno otherwise. | |
2269 | */ | |
30d21171 | 2270 | static int |
892a7f70 | 2271 | nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring) |
4c352362 | 2272 | { |
4c352362 JK |
2273 | int sz; |
2274 | ||
892a7f70 | 2275 | rx_ring->cnt = dp->rxd_cnt; |
4c352362 | 2276 | rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; |
79c12a75 | 2277 | rx_ring->rxds = dma_zalloc_coherent(dp->dev, rx_ring->size, |
4c352362 JK |
2278 | &rx_ring->dma, GFP_KERNEL); |
2279 | if (!rx_ring->rxds) | |
2280 | goto err_alloc; | |
2281 | ||
2282 | sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; | |
2283 | rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); | |
2284 | if (!rx_ring->rxbufs) | |
2285 | goto err_alloc; | |
2286 | ||
4c352362 JK |
2287 | return 0; |
2288 | ||
2289 | err_alloc: | |
2290 | nfp_net_rx_ring_free(rx_ring); | |
2291 | return -ENOMEM; | |
2292 | } | |
2293 | ||
892a7f70 | 2294 | static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
36a857e4 | 2295 | { |
36a857e4 JK |
2296 | unsigned int r; |
2297 | ||
892a7f70 JK |
2298 | dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings), |
2299 | GFP_KERNEL); | |
2300 | if (!dp->rx_rings) | |
2301 | return -ENOMEM; | |
36a857e4 | 2302 | |
892a7f70 JK |
2303 | for (r = 0; r < dp->num_rx_rings; r++) { |
2304 | nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r); | |
36a857e4 | 2305 | |
892a7f70 | 2306 | if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
2307 | goto err_free_prev; |
2308 | ||
892a7f70 | 2309 | if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
2310 | goto err_free_ring; |
2311 | } | |
2312 | ||
892a7f70 | 2313 | return 0; |
36a857e4 JK |
2314 | |
2315 | err_free_prev: | |
2316 | while (r--) { | |
892a7f70 | 2317 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); |
36a857e4 | 2318 | err_free_ring: |
892a7f70 | 2319 | nfp_net_rx_ring_free(&dp->rx_rings[r]); |
36a857e4 | 2320 | } |
892a7f70 JK |
2321 | kfree(dp->rx_rings); |
2322 | return -ENOMEM; | |
36a857e4 JK |
2323 | } |
2324 | ||
892a7f70 | 2325 | static void nfp_net_rx_rings_free(struct nfp_net_dp *dp) |
36a857e4 JK |
2326 | { |
2327 | unsigned int r; | |
2328 | ||
892a7f70 JK |
2329 | for (r = 0; r < dp->num_rx_rings; r++) { |
2330 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); | |
2331 | nfp_net_rx_ring_free(&dp->rx_rings[r]); | |
36a857e4 JK |
2332 | } |
2333 | ||
892a7f70 | 2334 | kfree(dp->rx_rings); |
36a857e4 JK |
2335 | } |
2336 | ||
e31230f9 | 2337 | static void |
79c12a75 JK |
2338 | nfp_net_vector_assign_rings(struct nfp_net_dp *dp, |
2339 | struct nfp_net_r_vector *r_vec, int idx) | |
e31230f9 | 2340 | { |
79c12a75 | 2341 | r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL; |
ecd63a02 | 2342 | r_vec->tx_ring = |
79c12a75 | 2343 | idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL; |
ecd63a02 | 2344 | |
79c12a75 JK |
2345 | r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ? |
2346 | &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL; | |
e31230f9 JK |
2347 | } |
2348 | ||
0afbfb18 JK |
2349 | static int |
2350 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
2351 | int idx) | |
4c352362 | 2352 | { |
0afbfb18 | 2353 | int err; |
4c352362 | 2354 | |
164d1e9e | 2355 | /* Setup NAPI */ |
77ece8d5 JK |
2356 | if (nn->dp.netdev) |
2357 | netif_napi_add(nn->dp.netdev, &r_vec->napi, | |
2358 | nfp_net_poll, NAPI_POLL_WEIGHT); | |
2359 | else | |
2360 | tasklet_enable(&r_vec->tasklet); | |
164d1e9e | 2361 | |
0afbfb18 | 2362 | snprintf(r_vec->name, sizeof(r_vec->name), |
77ece8d5 | 2363 | "%s-rxtx-%d", nfp_net_name(nn), idx); |
fdace6c2 JK |
2364 | err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, |
2365 | r_vec); | |
0afbfb18 | 2366 | if (err) { |
77ece8d5 JK |
2367 | if (nn->dp.netdev) |
2368 | netif_napi_del(&r_vec->napi); | |
2369 | else | |
2370 | tasklet_disable(&r_vec->tasklet); | |
2371 | ||
fdace6c2 | 2372 | nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); |
0afbfb18 JK |
2373 | return err; |
2374 | } | |
fdace6c2 | 2375 | disable_irq(r_vec->irq_vector); |
4c352362 | 2376 | |
fdace6c2 | 2377 | irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask); |
4c352362 | 2378 | |
fdace6c2 JK |
2379 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector, |
2380 | r_vec->irq_entry); | |
4c352362 | 2381 | |
0afbfb18 | 2382 | return 0; |
4c352362 JK |
2383 | } |
2384 | ||
0afbfb18 JK |
2385 | static void |
2386 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 2387 | { |
fdace6c2 | 2388 | irq_set_affinity_hint(r_vec->irq_vector, NULL); |
77ece8d5 JK |
2389 | if (nn->dp.netdev) |
2390 | netif_napi_del(&r_vec->napi); | |
2391 | else | |
2392 | tasklet_disable(&r_vec->tasklet); | |
2393 | ||
fdace6c2 | 2394 | free_irq(r_vec->irq_vector, r_vec); |
4c352362 JK |
2395 | } |
2396 | ||
2397 | /** | |
2398 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
2399 | * @nn: NFP Net device to reconfigure | |
2400 | */ | |
2401 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
2402 | { | |
2403 | int i; | |
2404 | ||
2405 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
2406 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
2407 | get_unaligned_le32(nn->rss_itbl + i)); | |
2408 | } | |
2409 | ||
2410 | /** | |
2411 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
2412 | * @nn: NFP Net device to reconfigure | |
2413 | */ | |
2414 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
2415 | { | |
2416 | int i; | |
2417 | ||
9ff304bf | 2418 | for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4) |
4c352362 JK |
2419 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, |
2420 | get_unaligned_le32(nn->rss_key + i)); | |
2421 | } | |
2422 | ||
2423 | /** | |
2424 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
2425 | * @nn: NFP Net device to reconfigure | |
2426 | */ | |
2427 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
2428 | { | |
2429 | u8 i; | |
2430 | u32 factor; | |
2431 | u32 value; | |
2432 | ||
2433 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
2434 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
2435 | * count. | |
2436 | */ | |
2437 | factor = nn->me_freq_mhz / 16; | |
2438 | ||
2439 | /* copy RX interrupt coalesce parameters */ | |
2440 | value = (nn->rx_coalesce_max_frames << 16) | | |
2441 | (factor * nn->rx_coalesce_usecs); | |
79c12a75 | 2442 | for (i = 0; i < nn->dp.num_rx_rings; i++) |
4c352362 JK |
2443 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); |
2444 | ||
2445 | /* copy TX interrupt coalesce parameters */ | |
2446 | value = (nn->tx_coalesce_max_frames << 16) | | |
2447 | (factor * nn->tx_coalesce_usecs); | |
79c12a75 | 2448 | for (i = 0; i < nn->dp.num_tx_rings; i++) |
4c352362 JK |
2449 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); |
2450 | } | |
2451 | ||
2452 | /** | |
f642963b | 2453 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 2454 | * @nn: NFP Net device to reconfigure |
9d372759 | 2455 | * @addr: MAC address to write |
4c352362 | 2456 | * |
f642963b JK |
2457 | * Writes the MAC address from the netdev to the device control BAR. Does not |
2458 | * perform the required reconfig. We do a bit of byte swapping dance because | |
2459 | * firmware is LE. | |
4c352362 | 2460 | */ |
9d372759 | 2461 | static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr) |
4c352362 | 2462 | { |
9d372759 PC |
2463 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr)); |
2464 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4)); | |
4c352362 JK |
2465 | } |
2466 | ||
ca40feab JK |
2467 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
2468 | { | |
2469 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
2470 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
2471 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
2472 | ||
2473 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
2474 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
2475 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
2476 | } | |
2477 | ||
4c352362 JK |
2478 | /** |
2479 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
2480 | * @nn: NFP Net device to reconfigure | |
2481 | */ | |
2482 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
2483 | { | |
2484 | u32 new_ctrl, update; | |
ca40feab | 2485 | unsigned int r; |
4c352362 JK |
2486 | int err; |
2487 | ||
79c12a75 | 2488 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2489 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; |
2490 | update = NFP_NET_CFG_UPDATE_GEN; | |
2491 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2492 | update |= NFP_NET_CFG_UPDATE_RING; | |
2493 | ||
2494 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2495 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
2496 | ||
2497 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2498 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2499 | ||
2500 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2501 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 2502 | if (err) |
4c352362 | 2503 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 2504 | |
79c12a75 JK |
2505 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
2506 | nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]); | |
2507 | for (r = 0; r < nn->dp.num_tx_rings; r++) | |
2508 | nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]); | |
2509 | for (r = 0; r < nn->dp.num_r_vecs; r++) | |
ca40feab JK |
2510 | nfp_net_vec_clear_ring_data(nn, r); |
2511 | ||
79c12a75 | 2512 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2513 | } |
2514 | ||
ca40feab | 2515 | static void |
cbeaf7aa JK |
2516 | nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, |
2517 | struct nfp_net_rx_ring *rx_ring, unsigned int idx) | |
ca40feab JK |
2518 | { |
2519 | /* Write the DMA address, size and MSI-X info to the device */ | |
cbeaf7aa JK |
2520 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma); |
2521 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt)); | |
fdace6c2 | 2522 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry); |
cbeaf7aa | 2523 | } |
ca40feab | 2524 | |
cbeaf7aa JK |
2525 | static void |
2526 | nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, | |
2527 | struct nfp_net_tx_ring *tx_ring, unsigned int idx) | |
2528 | { | |
2529 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma); | |
2530 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt)); | |
fdace6c2 | 2531 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry); |
ca40feab JK |
2532 | } |
2533 | ||
ac0488ef JK |
2534 | /** |
2535 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
2536 | * @nn: NFP Net device to reconfigure | |
2537 | */ | |
2538 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
1cd0cfc4 | 2539 | { |
ee200a73 | 2540 | u32 bufsz, new_ctrl, update = 0; |
1cd0cfc4 JK |
2541 | unsigned int r; |
2542 | int err; | |
2543 | ||
79c12a75 | 2544 | new_ctrl = nn->dp.ctrl; |
1cd0cfc4 | 2545 | |
611bdd49 | 2546 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) { |
1cd0cfc4 JK |
2547 | nfp_net_rss_write_key(nn); |
2548 | nfp_net_rss_write_itbl(nn); | |
2549 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
2550 | update |= NFP_NET_CFG_UPDATE_RSS; | |
2551 | } | |
2552 | ||
ad50451e | 2553 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) { |
1cd0cfc4 | 2554 | nfp_net_coalesce_write_cfg(nn); |
1cd0cfc4 JK |
2555 | update |= NFP_NET_CFG_UPDATE_IRQMOD; |
2556 | } | |
2557 | ||
79c12a75 JK |
2558 | for (r = 0; r < nn->dp.num_tx_rings; r++) |
2559 | nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r); | |
2560 | for (r = 0; r < nn->dp.num_rx_rings; r++) | |
2561 | nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r); | |
1cd0cfc4 | 2562 | |
79c12a75 JK |
2563 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ? |
2564 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1); | |
1cd0cfc4 | 2565 | |
79c12a75 JK |
2566 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ? |
2567 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1); | |
1cd0cfc4 | 2568 | |
5c0dbe9e JK |
2569 | if (nn->dp.netdev) |
2570 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); | |
1cd0cfc4 | 2571 | |
5c0dbe9e | 2572 | nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu); |
ee200a73 JK |
2573 | |
2574 | bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA; | |
2575 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz); | |
1cd0cfc4 JK |
2576 | |
2577 | /* Enable device */ | |
2578 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
2579 | update |= NFP_NET_CFG_UPDATE_GEN; | |
2580 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2581 | update |= NFP_NET_CFG_UPDATE_RING; | |
2582 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2583 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
2584 | ||
2585 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2586 | err = nfp_net_reconfig(nn, update); | |
ac0488ef JK |
2587 | if (err) { |
2588 | nfp_net_clear_config_and_disable(nn); | |
2589 | return err; | |
2590 | } | |
1cd0cfc4 | 2591 | |
79c12a75 | 2592 | nn->dp.ctrl = new_ctrl; |
1cd0cfc4 | 2593 | |
79c12a75 | 2594 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
6fe0c3b4 | 2595 | nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]); |
aba52df8 | 2596 | |
1cd0cfc4 JK |
2597 | /* Since reconfiguration requests while NFP is down are ignored we |
2598 | * have to wipe the entire VXLAN configuration and reinitialize it. | |
2599 | */ | |
79c12a75 | 2600 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_VXLAN) { |
1cd0cfc4 JK |
2601 | memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); |
2602 | memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); | |
79c12a75 | 2603 | udp_tunnel_get_rx_info(nn->dp.netdev); |
1cd0cfc4 JK |
2604 | } |
2605 | ||
ac0488ef | 2606 | return 0; |
1cd0cfc4 JK |
2607 | } |
2608 | ||
d00ca2f3 JK |
2609 | /** |
2610 | * nfp_net_close_stack() - Quiesce the stack (part of close) | |
2611 | * @nn: NFP Net device to reconfigure | |
2612 | */ | |
2613 | static void nfp_net_close_stack(struct nfp_net *nn) | |
2614 | { | |
2615 | unsigned int r; | |
2616 | ||
2617 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); | |
2618 | netif_carrier_off(nn->dp.netdev); | |
2619 | nn->link_up = false; | |
2620 | ||
2621 | for (r = 0; r < nn->dp.num_r_vecs; r++) { | |
2622 | disable_irq(nn->r_vecs[r].irq_vector); | |
2623 | napi_disable(&nn->r_vecs[r].napi); | |
2624 | } | |
2625 | ||
2626 | netif_tx_disable(nn->dp.netdev); | |
2627 | } | |
2628 | ||
2629 | /** | |
2630 | * nfp_net_close_free_all() - Free all runtime resources | |
2631 | * @nn: NFP Net device to reconfigure | |
2632 | */ | |
2633 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2634 | { | |
2635 | unsigned int r; | |
2636 | ||
4621199d JK |
2637 | nfp_net_tx_rings_free(&nn->dp); |
2638 | nfp_net_rx_rings_free(&nn->dp); | |
2639 | ||
d00ca2f3 JK |
2640 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
2641 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
2642 | ||
d00ca2f3 JK |
2643 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
2644 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2645 | } | |
2646 | ||
2647 | /** | |
2648 | * nfp_net_netdev_close() - Called when the device is downed | |
2649 | * @netdev: netdev structure | |
2650 | */ | |
2651 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2652 | { | |
2653 | struct nfp_net *nn = netdev_priv(netdev); | |
2654 | ||
2655 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective | |
2656 | */ | |
2657 | nfp_net_close_stack(nn); | |
2658 | ||
2659 | /* Step 2: Tell NFP | |
2660 | */ | |
2661 | nfp_net_clear_config_and_disable(nn); | |
2662 | ||
2663 | /* Step 3: Free resources | |
2664 | */ | |
2665 | nfp_net_close_free_all(nn); | |
2666 | ||
2667 | nn_dbg(nn, "%s down", netdev->name); | |
2668 | return 0; | |
2669 | } | |
2670 | ||
77ece8d5 JK |
2671 | void nfp_ctrl_close(struct nfp_net *nn) |
2672 | { | |
2673 | int r; | |
2674 | ||
2675 | rtnl_lock(); | |
2676 | ||
2677 | for (r = 0; r < nn->dp.num_r_vecs; r++) { | |
2678 | disable_irq(nn->r_vecs[r].irq_vector); | |
2679 | tasklet_disable(&nn->r_vecs[r].tasklet); | |
2680 | } | |
2681 | ||
2682 | nfp_net_clear_config_and_disable(nn); | |
2683 | ||
2684 | nfp_net_close_free_all(nn); | |
2685 | ||
2686 | rtnl_unlock(); | |
2687 | } | |
2688 | ||
1cd0cfc4 JK |
2689 | /** |
2690 | * nfp_net_open_stack() - Start the device from stack's perspective | |
2691 | * @nn: NFP Net device to reconfigure | |
2692 | */ | |
2693 | static void nfp_net_open_stack(struct nfp_net *nn) | |
2694 | { | |
2695 | unsigned int r; | |
2696 | ||
79c12a75 | 2697 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
aba52df8 | 2698 | napi_enable(&nn->r_vecs[r].napi); |
fdace6c2 | 2699 | enable_irq(nn->r_vecs[r].irq_vector); |
aba52df8 | 2700 | } |
1cd0cfc4 | 2701 | |
79c12a75 | 2702 | netif_tx_wake_all_queues(nn->dp.netdev); |
1cd0cfc4 | 2703 | |
ce449ba7 | 2704 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
2705 | nfp_net_read_link_status(nn); |
2706 | } | |
2707 | ||
ee26756d | 2708 | static int nfp_net_open_alloc_all(struct nfp_net *nn) |
4c352362 | 2709 | { |
4c352362 | 2710 | int err, r; |
4c352362 | 2711 | |
4c352362 JK |
2712 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", |
2713 | nn->exn_name, sizeof(nn->exn_name), | |
2714 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2715 | if (err) | |
2716 | return err; | |
0ba40af9 JK |
2717 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2718 | nn->lsc_name, sizeof(nn->lsc_name), | |
2719 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2720 | if (err) | |
2721 | goto err_free_exn; | |
ce449ba7 | 2722 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2723 | |
79c12a75 | 2724 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
0afbfb18 JK |
2725 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
2726 | if (err) | |
cbeaf7aa JK |
2727 | goto err_cleanup_vec_p; |
2728 | } | |
a10b563d | 2729 | |
892a7f70 JK |
2730 | err = nfp_net_rx_rings_prepare(nn, &nn->dp); |
2731 | if (err) | |
a10b563d | 2732 | goto err_cleanup_vec; |
114bdef0 | 2733 | |
892a7f70 JK |
2734 | err = nfp_net_tx_rings_prepare(nn, &nn->dp); |
2735 | if (err) | |
a10b563d | 2736 | goto err_free_rx_rings; |
4c352362 | 2737 | |
e31230f9 | 2738 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 2739 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 2740 | |
ee26756d JK |
2741 | return 0; |
2742 | ||
2743 | err_free_rx_rings: | |
2744 | nfp_net_rx_rings_free(&nn->dp); | |
2745 | err_cleanup_vec: | |
2746 | r = nn->dp.num_r_vecs; | |
2747 | err_cleanup_vec_p: | |
2748 | while (r--) | |
2749 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
2750 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); | |
2751 | err_free_exn: | |
2752 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2753 | return err; | |
2754 | } | |
2755 | ||
2756 | static int nfp_net_netdev_open(struct net_device *netdev) | |
2757 | { | |
2758 | struct nfp_net *nn = netdev_priv(netdev); | |
2759 | int err; | |
2760 | ||
2761 | /* Step 1: Allocate resources for rings and the like | |
2762 | * - Request interrupts | |
2763 | * - Allocate RX and TX ring resources | |
2764 | * - Setup initial RSS table | |
2765 | */ | |
2766 | err = nfp_net_open_alloc_all(nn); | |
2767 | if (err) | |
2768 | return err; | |
2769 | ||
79c12a75 | 2770 | err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings); |
4c352362 | 2771 | if (err) |
ee26756d | 2772 | goto err_free_all; |
4c352362 | 2773 | |
79c12a75 | 2774 | err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings); |
4c352362 | 2775 | if (err) |
ee26756d | 2776 | goto err_free_all; |
4c352362 | 2777 | |
4c352362 JK |
2778 | /* Step 2: Configure the NFP |
2779 | * - Enable rings from 0 to tx_rings/rx_rings - 1. | |
2780 | * - Write MAC address (in case it changed) | |
2781 | * - Set the MTU | |
2782 | * - Set the Freelist buffer size | |
2783 | * - Enable the FW | |
2784 | */ | |
1cd0cfc4 | 2785 | err = nfp_net_set_config_and_enable(nn); |
4c352362 | 2786 | if (err) |
ee26756d | 2787 | goto err_free_all; |
4c352362 JK |
2788 | |
2789 | /* Step 3: Enable for kernel | |
2790 | * - put some freelist descriptors on each RX ring | |
2791 | * - enable NAPI on each ring | |
2792 | * - enable all TX queues | |
2793 | * - set link state | |
2794 | */ | |
1cd0cfc4 | 2795 | nfp_net_open_stack(nn); |
4c352362 JK |
2796 | |
2797 | return 0; | |
2798 | ||
ee26756d JK |
2799 | err_free_all: |
2800 | nfp_net_close_free_all(nn); | |
4c352362 JK |
2801 | return err; |
2802 | } | |
2803 | ||
77ece8d5 JK |
2804 | int nfp_ctrl_open(struct nfp_net *nn) |
2805 | { | |
2806 | int err, r; | |
2807 | ||
2808 | /* ring dumping depends on vNICs being opened/closed under rtnl */ | |
2809 | rtnl_lock(); | |
2810 | ||
2811 | err = nfp_net_open_alloc_all(nn); | |
2812 | if (err) | |
2813 | goto err_unlock; | |
2814 | ||
2815 | err = nfp_net_set_config_and_enable(nn); | |
2816 | if (err) | |
2817 | goto err_free_all; | |
2818 | ||
2819 | for (r = 0; r < nn->dp.num_r_vecs; r++) | |
2820 | enable_irq(nn->r_vecs[r].irq_vector); | |
2821 | ||
2822 | rtnl_unlock(); | |
2823 | ||
2824 | return 0; | |
2825 | ||
2826 | err_free_all: | |
2827 | nfp_net_close_free_all(nn); | |
2828 | err_unlock: | |
2829 | rtnl_unlock(); | |
2830 | return err; | |
2831 | } | |
2832 | ||
4c352362 JK |
2833 | static void nfp_net_set_rx_mode(struct net_device *netdev) |
2834 | { | |
2835 | struct nfp_net *nn = netdev_priv(netdev); | |
2836 | u32 new_ctrl; | |
2837 | ||
79c12a75 | 2838 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2839 | |
2840 | if (netdev->flags & IFF_PROMISC) { | |
2841 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
2842 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
2843 | else | |
2844 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
2845 | } else { | |
2846 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
2847 | } | |
2848 | ||
79c12a75 | 2849 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
2850 | return; |
2851 | ||
2852 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 2853 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 | 2854 | |
79c12a75 | 2855 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2856 | } |
2857 | ||
1e9e10d0 JK |
2858 | static void nfp_net_rss_init_itbl(struct nfp_net *nn) |
2859 | { | |
2860 | int i; | |
2861 | ||
2862 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
2863 | nn->rss_itbl[i] = | |
79c12a75 | 2864 | ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings); |
1e9e10d0 JK |
2865 | } |
2866 | ||
512e94dc JK |
2867 | static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) |
2868 | { | |
2869 | struct nfp_net_dp new_dp = *dp; | |
2870 | ||
2871 | *dp = nn->dp; | |
2872 | nn->dp = new_dp; | |
76e1e1a8 JK |
2873 | |
2874 | nn->dp.netdev->mtu = new_dp.mtu; | |
892a7f70 JK |
2875 | |
2876 | if (!netif_is_rxfh_configured(nn->dp.netdev)) | |
2877 | nfp_net_rss_init_itbl(nn); | |
512e94dc JK |
2878 | } |
2879 | ||
892a7f70 | 2880 | static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp) |
4c352362 | 2881 | { |
e31230f9 | 2882 | unsigned int r; |
164d1e9e | 2883 | int err; |
e31230f9 | 2884 | |
892a7f70 | 2885 | nfp_net_dp_swap(nn, dp); |
164d1e9e | 2886 | |
e31230f9 | 2887 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 2888 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 2889 | |
79c12a75 | 2890 | err = netif_set_real_num_rx_queues(nn->dp.netdev, nn->dp.num_rx_rings); |
08348995 AB |
2891 | if (err) |
2892 | return err; | |
164d1e9e | 2893 | |
79c12a75 JK |
2894 | if (nn->dp.netdev->real_num_tx_queues != nn->dp.num_stack_tx_rings) { |
2895 | err = netif_set_real_num_tx_queues(nn->dp.netdev, | |
2896 | nn->dp.num_stack_tx_rings); | |
164d1e9e JK |
2897 | if (err) |
2898 | return err; | |
2899 | } | |
2900 | ||
ac0488ef | 2901 | return nfp_net_set_config_and_enable(nn); |
68453c7a | 2902 | } |
36a857e4 | 2903 | |
783496b0 JK |
2904 | struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) |
2905 | { | |
2906 | struct nfp_net_dp *new; | |
2907 | ||
2908 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
2909 | if (!new) | |
2910 | return NULL; | |
2911 | ||
2912 | *new = nn->dp; | |
2913 | ||
2914 | /* Clear things which need to be recomputed */ | |
2915 | new->fl_bufsz = 0; | |
2916 | new->tx_rings = NULL; | |
2917 | new->rx_rings = NULL; | |
2918 | new->num_r_vecs = 0; | |
2919 | new->num_stack_tx_rings = 0; | |
2920 | ||
2921 | return new; | |
2922 | } | |
2923 | ||
d957c0f7 JK |
2924 | static int |
2925 | nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, | |
2926 | struct netlink_ext_ack *extack) | |
ecd63a02 JK |
2927 | { |
2928 | /* XDP-enabled tests */ | |
9dc6b116 | 2929 | if (!dp->xdp_prog) |
ecd63a02 | 2930 | return 0; |
2195c263 | 2931 | if (dp->fl_bufsz > PAGE_SIZE) { |
4d463c4d | 2932 | NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled"); |
ecd63a02 JK |
2933 | return -EINVAL; |
2934 | } | |
892a7f70 | 2935 | if (dp->num_tx_rings > nn->max_tx_rings) { |
4d463c4d | 2936 | NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled"); |
ecd63a02 JK |
2937 | return -EINVAL; |
2938 | } | |
2939 | ||
2940 | return 0; | |
2941 | } | |
2942 | ||
d957c0f7 JK |
2943 | int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, |
2944 | struct netlink_ext_ack *extack) | |
cc7c0333 | 2945 | { |
512e94dc | 2946 | int r, err; |
cc7c0333 | 2947 | |
76e1e1a8 | 2948 | dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); |
2195c263 | 2949 | |
892a7f70 | 2950 | dp->num_stack_tx_rings = dp->num_tx_rings; |
9dc6b116 | 2951 | if (dp->xdp_prog) |
892a7f70 | 2952 | dp->num_stack_tx_rings -= dp->num_rx_rings; |
ecd63a02 | 2953 | |
892a7f70 | 2954 | dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings); |
ecd63a02 | 2955 | |
d957c0f7 | 2956 | err = nfp_net_check_config(nn, dp, extack); |
ecd63a02 | 2957 | if (err) |
783496b0 | 2958 | goto exit_free_dp; |
164d1e9e | 2959 | |
783496b0 | 2960 | if (!netif_running(dp->netdev)) { |
892a7f70 | 2961 | nfp_net_dp_swap(nn, dp); |
783496b0 JK |
2962 | err = 0; |
2963 | goto exit_free_dp; | |
cc7c0333 JK |
2964 | } |
2965 | ||
cc7c0333 | 2966 | /* Prepare new rings */ |
512e94dc | 2967 | for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) { |
164d1e9e JK |
2968 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
2969 | if (err) { | |
512e94dc | 2970 | dp->num_r_vecs = r; |
164d1e9e JK |
2971 | goto err_cleanup_vecs; |
2972 | } | |
2973 | } | |
892a7f70 JK |
2974 | |
2975 | err = nfp_net_rx_rings_prepare(nn, dp); | |
2976 | if (err) | |
2977 | goto err_cleanup_vecs; | |
2978 | ||
2979 | err = nfp_net_tx_rings_prepare(nn, dp); | |
2980 | if (err) | |
2981 | goto err_free_rx; | |
cc7c0333 JK |
2982 | |
2983 | /* Stop device, swap in new rings, try to start the firmware */ | |
2984 | nfp_net_close_stack(nn); | |
2985 | nfp_net_clear_config_and_disable(nn); | |
2986 | ||
892a7f70 | 2987 | err = nfp_net_dp_swap_enable(nn, dp); |
cc7c0333 | 2988 | if (err) { |
68453c7a | 2989 | int err2; |
cc7c0333 | 2990 | |
68453c7a | 2991 | nfp_net_clear_config_and_disable(nn); |
cc7c0333 | 2992 | |
68453c7a | 2993 | /* Try with old configuration and old rings */ |
892a7f70 | 2994 | err2 = nfp_net_dp_swap_enable(nn, dp); |
68453c7a | 2995 | if (err2) |
cc7c0333 | 2996 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", |
68453c7a | 2997 | err, err2); |
cc7c0333 | 2998 | } |
512e94dc | 2999 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 3000 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
cc7c0333 | 3001 | |
892a7f70 JK |
3002 | nfp_net_rx_rings_free(dp); |
3003 | nfp_net_tx_rings_free(dp); | |
cc7c0333 JK |
3004 | |
3005 | nfp_net_open_stack(nn); | |
783496b0 JK |
3006 | exit_free_dp: |
3007 | kfree(dp); | |
cc7c0333 JK |
3008 | |
3009 | return err; | |
68453c7a JK |
3010 | |
3011 | err_free_rx: | |
892a7f70 | 3012 | nfp_net_rx_rings_free(dp); |
164d1e9e | 3013 | err_cleanup_vecs: |
512e94dc | 3014 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 3015 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
783496b0 | 3016 | kfree(dp); |
68453c7a JK |
3017 | return err; |
3018 | } | |
3019 | ||
3020 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
3021 | { | |
3022 | struct nfp_net *nn = netdev_priv(netdev); | |
783496b0 JK |
3023 | struct nfp_net_dp *dp; |
3024 | ||
3025 | dp = nfp_net_clone_dp(nn); | |
3026 | if (!dp) | |
3027 | return -ENOMEM; | |
68453c7a | 3028 | |
76e1e1a8 JK |
3029 | dp->mtu = new_mtu; |
3030 | ||
d957c0f7 | 3031 | return nfp_net_ring_reconfig(nn, dp, NULL); |
cc7c0333 JK |
3032 | } |
3033 | ||
b64052fc PC |
3034 | static int |
3035 | nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) | |
3036 | { | |
3037 | struct nfp_net *nn = netdev_priv(netdev); | |
3038 | ||
3039 | /* Priority tagged packets with vlan id 0 are processed by the | |
3040 | * NFP as untagged packets | |
3041 | */ | |
3042 | if (!vid) | |
3043 | return 0; | |
3044 | ||
3045 | nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid); | |
3046 | nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q); | |
3047 | ||
3048 | return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD); | |
3049 | } | |
3050 | ||
3051 | static int | |
3052 | nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) | |
3053 | { | |
3054 | struct nfp_net *nn = netdev_priv(netdev); | |
3055 | ||
3056 | /* Priority tagged packets with vlan id 0 are processed by the | |
3057 | * NFP as untagged packets | |
3058 | */ | |
3059 | if (!vid) | |
3060 | return 0; | |
3061 | ||
3062 | nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid); | |
3063 | nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q); | |
3064 | ||
3065 | return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL); | |
3066 | } | |
3067 | ||
bc1f4470 | 3068 | static void nfp_net_stat64(struct net_device *netdev, |
3069 | struct rtnl_link_stats64 *stats) | |
4c352362 JK |
3070 | { |
3071 | struct nfp_net *nn = netdev_priv(netdev); | |
3072 | int r; | |
3073 | ||
79c12a75 | 3074 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
4c352362 JK |
3075 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; |
3076 | u64 data[3]; | |
3077 | unsigned int start; | |
3078 | ||
3079 | do { | |
3080 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
3081 | data[0] = r_vec->rx_pkts; | |
3082 | data[1] = r_vec->rx_bytes; | |
3083 | data[2] = r_vec->rx_drops; | |
3084 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
3085 | stats->rx_packets += data[0]; | |
3086 | stats->rx_bytes += data[1]; | |
3087 | stats->rx_dropped += data[2]; | |
3088 | ||
3089 | do { | |
3090 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
3091 | data[0] = r_vec->tx_pkts; | |
3092 | data[1] = r_vec->tx_bytes; | |
3093 | data[2] = r_vec->tx_errors; | |
3094 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
3095 | stats->tx_packets += data[0]; | |
3096 | stats->tx_bytes += data[1]; | |
3097 | stats->tx_errors += data[2]; | |
3098 | } | |
4c352362 JK |
3099 | } |
3100 | ||
3101 | static int nfp_net_set_features(struct net_device *netdev, | |
3102 | netdev_features_t features) | |
3103 | { | |
3104 | netdev_features_t changed = netdev->features ^ features; | |
3105 | struct nfp_net *nn = netdev_priv(netdev); | |
3106 | u32 new_ctrl; | |
3107 | int err; | |
3108 | ||
3109 | /* Assume this is not called with features we have not advertised */ | |
3110 | ||
79c12a75 | 3111 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
3112 | |
3113 | if (changed & NETIF_F_RXCSUM) { | |
3114 | if (features & NETIF_F_RXCSUM) | |
ddb98d94 | 3115 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 | 3116 | else |
ddb98d94 | 3117 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
3118 | } |
3119 | ||
3120 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
3121 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
3122 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
3123 | else | |
3124 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
3125 | } | |
3126 | ||
3127 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
3128 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
28063be6 EP |
3129 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
3130 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 3131 | else |
28063be6 | 3132 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 JK |
3133 | } |
3134 | ||
3135 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
3136 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
3137 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
3138 | else | |
3139 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
3140 | } | |
3141 | ||
3142 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
3143 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
3144 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
3145 | else | |
3146 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
3147 | } | |
3148 | ||
b64052fc PC |
3149 | if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { |
3150 | if (features & NETIF_F_HW_VLAN_CTAG_FILTER) | |
3151 | new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3152 | else | |
3153 | new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3154 | } | |
3155 | ||
4c352362 JK |
3156 | if (changed & NETIF_F_SG) { |
3157 | if (features & NETIF_F_SG) | |
3158 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
3159 | else | |
3160 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
3161 | } | |
3162 | ||
bb45e51c | 3163 | if (changed & NETIF_F_HW_TC && nfp_app_tc_busy(nn->app, nn)) { |
7533fdc0 JK |
3164 | nn_err(nn, "Cannot disable HW TC offload while in use\n"); |
3165 | return -EBUSY; | |
3166 | } | |
3167 | ||
4c352362 JK |
3168 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", |
3169 | netdev->features, features, changed); | |
3170 | ||
79c12a75 | 3171 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
3172 | return 0; |
3173 | ||
79c12a75 | 3174 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl); |
4c352362 JK |
3175 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); |
3176 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
3177 | if (err) | |
3178 | return err; | |
3179 | ||
79c12a75 | 3180 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
3181 | |
3182 | return 0; | |
3183 | } | |
3184 | ||
3185 | static netdev_features_t | |
3186 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
3187 | netdev_features_t features) | |
3188 | { | |
3189 | u8 l4_hdr; | |
3190 | ||
3191 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
3192 | features &= vlan_features_check(skb, features); | |
3193 | ||
3194 | if (!skb->encapsulation) | |
3195 | return features; | |
3196 | ||
3197 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
3198 | if (skb_is_gso(skb)) { | |
3199 | u32 hdrlen; | |
3200 | ||
3201 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
3202 | inner_tcp_hdrlen(skb); | |
3203 | ||
3204 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) | |
3205 | features &= ~NETIF_F_GSO_MASK; | |
3206 | } | |
3207 | ||
3208 | /* VXLAN/GRE check */ | |
3209 | switch (vlan_get_protocol(skb)) { | |
3210 | case htons(ETH_P_IP): | |
3211 | l4_hdr = ip_hdr(skb)->protocol; | |
3212 | break; | |
3213 | case htons(ETH_P_IPV6): | |
3214 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
3215 | break; | |
3216 | default: | |
a188222b | 3217 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
3218 | } |
3219 | ||
3220 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
3221 | skb->inner_protocol != htons(ETH_P_TEB) || | |
3222 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
3223 | (l4_hdr == IPPROTO_UDP && | |
3224 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
3225 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 3226 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
3227 | |
3228 | return features; | |
3229 | } | |
3230 | ||
3231 | /** | |
3232 | * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW | |
3233 | * @nn: NFP Net device to reconfigure | |
3234 | * @idx: Index into the port table where new port should be written | |
3235 | * @port: UDP port to configure (pass zero to remove VXLAN port) | |
3236 | */ | |
3237 | static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) | |
3238 | { | |
3239 | int i; | |
3240 | ||
3241 | nn->vxlan_ports[idx] = port; | |
3242 | ||
79c12a75 | 3243 | if (!(nn->dp.ctrl & NFP_NET_CFG_CTRL_VXLAN)) |
4c352362 JK |
3244 | return; |
3245 | ||
3246 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
3247 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) | |
3248 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), | |
3249 | be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | | |
3250 | be16_to_cpu(nn->vxlan_ports[i])); | |
3251 | ||
3d780b92 | 3252 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN); |
4c352362 JK |
3253 | } |
3254 | ||
3255 | /** | |
3256 | * nfp_net_find_vxlan_idx() - find table entry of the port or a free one | |
3257 | * @nn: NFP Network structure | |
3258 | * @port: UDP port to look for | |
3259 | * | |
3260 | * Return: if the port is already in the table -- it's position; | |
3261 | * if the port is not in the table -- free position to use; | |
3262 | * if the table is full -- -ENOSPC. | |
3263 | */ | |
3264 | static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) | |
3265 | { | |
3266 | int i, free_idx = -ENOSPC; | |
3267 | ||
3268 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { | |
3269 | if (nn->vxlan_ports[i] == port) | |
3270 | return i; | |
3271 | if (!nn->vxlan_usecnt[i]) | |
3272 | free_idx = i; | |
3273 | } | |
3274 | ||
3275 | return free_idx; | |
3276 | } | |
3277 | ||
3278 | static void nfp_net_add_vxlan_port(struct net_device *netdev, | |
3ab68837 | 3279 | struct udp_tunnel_info *ti) |
4c352362 JK |
3280 | { |
3281 | struct nfp_net *nn = netdev_priv(netdev); | |
3282 | int idx; | |
3283 | ||
3ab68837 AD |
3284 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
3285 | return; | |
3286 | ||
3287 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
4c352362 JK |
3288 | if (idx == -ENOSPC) |
3289 | return; | |
3290 | ||
3291 | if (!nn->vxlan_usecnt[idx]++) | |
3ab68837 | 3292 | nfp_net_set_vxlan_port(nn, idx, ti->port); |
4c352362 JK |
3293 | } |
3294 | ||
3295 | static void nfp_net_del_vxlan_port(struct net_device *netdev, | |
3ab68837 | 3296 | struct udp_tunnel_info *ti) |
4c352362 JK |
3297 | { |
3298 | struct nfp_net *nn = netdev_priv(netdev); | |
3299 | int idx; | |
3300 | ||
3ab68837 AD |
3301 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
3302 | return; | |
3303 | ||
3304 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
f50cef6f | 3305 | if (idx == -ENOSPC || !nn->vxlan_usecnt[idx]) |
4c352362 JK |
3306 | return; |
3307 | ||
3308 | if (!--nn->vxlan_usecnt[idx]) | |
3309 | nfp_net_set_vxlan_port(nn, idx, 0); | |
3310 | } | |
3311 | ||
c443b5ac JK |
3312 | static int |
3313 | nfp_net_xdp_setup_drv(struct nfp_net *nn, struct bpf_prog *prog, | |
3314 | struct netlink_ext_ack *extack) | |
ecd63a02 | 3315 | { |
783496b0 | 3316 | struct nfp_net_dp *dp; |
ecd63a02 | 3317 | |
6a8ef542 JK |
3318 | if (!prog == !nn->dp.xdp_prog) { |
3319 | WRITE_ONCE(nn->dp.xdp_prog, prog); | |
ecd63a02 JK |
3320 | return 0; |
3321 | } | |
3322 | ||
783496b0 JK |
3323 | dp = nfp_net_clone_dp(nn); |
3324 | if (!dp) | |
3325 | return -ENOMEM; | |
3326 | ||
9dc6b116 | 3327 | dp->xdp_prog = prog; |
892a7f70 | 3328 | dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; |
c487e6b1 | 3329 | dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; |
dbf637ff | 3330 | dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0; |
ecd63a02 JK |
3331 | |
3332 | /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ | |
6a8ef542 | 3333 | return nfp_net_ring_reconfig(nn, dp, extack); |
c443b5ac JK |
3334 | } |
3335 | ||
3336 | static int | |
9f82fca9 | 3337 | nfp_net_xdp_setup(struct nfp_net *nn, struct bpf_prog *prog, u32 flags, |
c443b5ac JK |
3338 | struct netlink_ext_ack *extack) |
3339 | { | |
cafa92ac | 3340 | struct bpf_prog *drv_prog, *offload_prog; |
c443b5ac JK |
3341 | int err; |
3342 | ||
6a8ef542 | 3343 | if (nn->xdp_prog && (flags ^ nn->xdp_flags) & XDP_FLAGS_MODES) |
9f82fca9 JK |
3344 | return -EBUSY; |
3345 | ||
cafa92ac JK |
3346 | /* Load both when no flags set to allow easy activation of driver path |
3347 | * when program is replaced by one which can't be offloaded. | |
3348 | */ | |
3349 | drv_prog = flags & XDP_FLAGS_HW_MODE ? NULL : prog; | |
9f82fca9 JK |
3350 | offload_prog = flags & XDP_FLAGS_DRV_MODE ? NULL : prog; |
3351 | ||
cafa92ac | 3352 | err = nfp_net_xdp_setup_drv(nn, drv_prog, extack); |
c443b5ac JK |
3353 | if (err) |
3354 | return err; | |
3355 | ||
cafa92ac JK |
3356 | err = nfp_app_xdp_offload(nn->app, nn, offload_prog); |
3357 | if (err && flags & XDP_FLAGS_HW_MODE) | |
3358 | return err; | |
6a8ef542 JK |
3359 | |
3360 | if (nn->xdp_prog) | |
3361 | bpf_prog_put(nn->xdp_prog); | |
3362 | nn->xdp_prog = prog; | |
9f82fca9 | 3363 | nn->xdp_flags = flags; |
6d677075 | 3364 | |
ecd63a02 JK |
3365 | return 0; |
3366 | } | |
3367 | ||
3368 | static int nfp_net_xdp(struct net_device *netdev, struct netdev_xdp *xdp) | |
3369 | { | |
3370 | struct nfp_net *nn = netdev_priv(netdev); | |
3371 | ||
3372 | switch (xdp->command) { | |
3373 | case XDP_SETUP_PROG: | |
cafa92ac | 3374 | case XDP_SETUP_PROG_HW: |
9f82fca9 JK |
3375 | return nfp_net_xdp_setup(nn, xdp->prog, xdp->flags, |
3376 | xdp->extack); | |
ecd63a02 | 3377 | case XDP_QUERY_PROG: |
6a8ef542 | 3378 | xdp->prog_attached = !!nn->xdp_prog; |
149d7a57 JK |
3379 | if (nn->dp.bpf_offload_xdp) |
3380 | xdp->prog_attached = XDP_ATTACHED_HW; | |
6a8ef542 | 3381 | xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0; |
ecd63a02 JK |
3382 | return 0; |
3383 | default: | |
3384 | return -EINVAL; | |
3385 | } | |
3386 | } | |
3387 | ||
9d372759 PC |
3388 | static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) |
3389 | { | |
3390 | struct nfp_net *nn = netdev_priv(netdev); | |
3391 | struct sockaddr *saddr = addr; | |
3392 | int err; | |
3393 | ||
3394 | err = eth_prepare_mac_addr_change(netdev, addr); | |
3395 | if (err) | |
3396 | return err; | |
3397 | ||
3398 | nfp_net_write_mac_addr(nn, saddr->sa_data); | |
3399 | ||
3400 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR); | |
3401 | if (err) | |
3402 | return err; | |
3403 | ||
3404 | eth_commit_mac_addr_change(netdev, addr); | |
3405 | ||
3406 | return 0; | |
3407 | } | |
3408 | ||
eb488c26 | 3409 | const struct net_device_ops nfp_net_netdev_ops = { |
4c352362 JK |
3410 | .ndo_open = nfp_net_netdev_open, |
3411 | .ndo_stop = nfp_net_netdev_close, | |
3412 | .ndo_start_xmit = nfp_net_tx, | |
3413 | .ndo_get_stats64 = nfp_net_stat64, | |
b64052fc PC |
3414 | .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, |
3415 | .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, | |
8a276873 | 3416 | .ndo_setup_tc = nfp_port_setup_tc, |
4c352362 JK |
3417 | .ndo_tx_timeout = nfp_net_tx_timeout, |
3418 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
3419 | .ndo_change_mtu = nfp_net_change_mtu, | |
9d372759 | 3420 | .ndo_set_mac_address = nfp_net_set_mac_address, |
4c352362 JK |
3421 | .ndo_set_features = nfp_net_set_features, |
3422 | .ndo_features_check = nfp_net_features_check, | |
eb488c26 | 3423 | .ndo_get_phys_port_name = nfp_port_get_phys_port_name, |
3ab68837 AD |
3424 | .ndo_udp_tunnel_add = nfp_net_add_vxlan_port, |
3425 | .ndo_udp_tunnel_del = nfp_net_del_vxlan_port, | |
ecd63a02 | 3426 | .ndo_xdp = nfp_net_xdp, |
4c352362 JK |
3427 | }; |
3428 | ||
3429 | /** | |
3430 | * nfp_net_info() - Print general info about the NIC | |
3431 | * @nn: NFP Net device to reconfigure | |
3432 | */ | |
3433 | void nfp_net_info(struct nfp_net *nn) | |
3434 | { | |
416db5c1 | 3435 | nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", |
79c12a75 JK |
3436 | nn->dp.is_vf ? "VF " : "", |
3437 | nn->dp.num_tx_rings, nn->max_tx_rings, | |
3438 | nn->dp.num_rx_rings, nn->max_rx_rings); | |
4c352362 JK |
3439 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", |
3440 | nn->fw_ver.resv, nn->fw_ver.class, | |
3441 | nn->fw_ver.major, nn->fw_ver.minor, | |
3442 | nn->max_mtu); | |
b64052fc | 3443 | nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
4c352362 JK |
3444 | nn->cap, |
3445 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
3446 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
3447 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
3448 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
3449 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
3450 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
3451 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
3452 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
3453 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
28063be6 EP |
3454 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "", |
3455 | nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "", | |
611bdd49 EP |
3456 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "", |
3457 | nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "", | |
b64052fc | 3458 | nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "", |
4c352362 JK |
3459 | nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", |
3460 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", | |
3461 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
3462 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
7533fdc0 | 3463 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", |
ddb98d94 | 3464 | nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? |
9d372759 | 3465 | "RXCSUM_COMPLETE " : "", |
bb45e51c JK |
3466 | nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "", |
3467 | nfp_app_extra_cap(nn->app, nn)); | |
4c352362 JK |
3468 | } |
3469 | ||
3470 | /** | |
beba69ca | 3471 | * nfp_net_alloc() - Allocate netdev and related structure |
4c352362 | 3472 | * @pdev: PCI device |
a7b1ad08 | 3473 | * @needs_netdev: Whether to allocate a netdev for this vNIC |
4c352362 JK |
3474 | * @max_tx_rings: Maximum number of TX rings supported by device |
3475 | * @max_rx_rings: Maximum number of RX rings supported by device | |
3476 | * | |
3477 | * This function allocates a netdev device and fills in the initial | |
a7b1ad08 JK |
3478 | * part of the @struct nfp_net structure. In case of control device |
3479 | * nfp_net structure is allocated without the netdev. | |
4c352362 JK |
3480 | * |
3481 | * Return: NFP Net device structure, or ERR_PTR on error. | |
3482 | */ | |
a7b1ad08 | 3483 | struct nfp_net *nfp_net_alloc(struct pci_dev *pdev, bool needs_netdev, |
beba69ca JK |
3484 | unsigned int max_tx_rings, |
3485 | unsigned int max_rx_rings) | |
4c352362 | 3486 | { |
4c352362 | 3487 | struct nfp_net *nn; |
4c352362 | 3488 | |
a7b1ad08 JK |
3489 | if (needs_netdev) { |
3490 | struct net_device *netdev; | |
4c352362 | 3491 | |
a7b1ad08 JK |
3492 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), |
3493 | max_tx_rings, max_rx_rings); | |
3494 | if (!netdev) | |
3495 | return ERR_PTR(-ENOMEM); | |
3496 | ||
3497 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
3498 | nn = netdev_priv(netdev); | |
3499 | nn->dp.netdev = netdev; | |
3500 | } else { | |
3501 | nn = vzalloc(sizeof(*nn)); | |
3502 | if (!nn) | |
3503 | return ERR_PTR(-ENOMEM); | |
3504 | } | |
4c352362 | 3505 | |
79c12a75 | 3506 | nn->dp.dev = &pdev->dev; |
4c352362 JK |
3507 | nn->pdev = pdev; |
3508 | ||
3509 | nn->max_tx_rings = max_tx_rings; | |
3510 | nn->max_rx_rings = max_rx_rings; | |
3511 | ||
79c12a75 JK |
3512 | nn->dp.num_tx_rings = min_t(unsigned int, |
3513 | max_tx_rings, num_online_cpus()); | |
3514 | nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings, | |
cbeaf7aa | 3515 | netif_get_num_default_rss_queues()); |
4c352362 | 3516 | |
79c12a75 JK |
3517 | nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); |
3518 | nn->dp.num_r_vecs = min_t(unsigned int, | |
3519 | nn->dp.num_r_vecs, num_online_cpus()); | |
4b27a1eb | 3520 | |
79c12a75 JK |
3521 | nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; |
3522 | nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
4c352362 JK |
3523 | |
3524 | spin_lock_init(&nn->reconfig_lock); | |
3525 | spin_lock_init(&nn->link_status_lock); | |
3526 | ||
3d780b92 JK |
3527 | setup_timer(&nn->reconfig_timer, |
3528 | nfp_net_reconfig_timer, (unsigned long)nn); | |
3529 | ||
4c352362 JK |
3530 | return nn; |
3531 | } | |
3532 | ||
3533 | /** | |
beba69ca | 3534 | * nfp_net_free() - Undo what @nfp_net_alloc() did |
4c352362 JK |
3535 | * @nn: NFP Net device to reconfigure |
3536 | */ | |
beba69ca | 3537 | void nfp_net_free(struct nfp_net *nn) |
4c352362 | 3538 | { |
6a8ef542 JK |
3539 | if (nn->xdp_prog) |
3540 | bpf_prog_put(nn->xdp_prog); | |
3541 | ||
a7b1ad08 JK |
3542 | if (nn->dp.netdev) |
3543 | free_netdev(nn->dp.netdev); | |
3544 | else | |
3545 | vfree(nn); | |
4c352362 JK |
3546 | } |
3547 | ||
9ff304bf JK |
3548 | /** |
3549 | * nfp_net_rss_key_sz() - Get current size of the RSS key | |
3550 | * @nn: NFP Net device instance | |
3551 | * | |
3552 | * Return: size of the RSS key for currently selected hash function. | |
3553 | */ | |
3554 | unsigned int nfp_net_rss_key_sz(struct nfp_net *nn) | |
3555 | { | |
3556 | switch (nn->rss_hfunc) { | |
3557 | case ETH_RSS_HASH_TOP: | |
3558 | return NFP_NET_CFG_RSS_KEY_SZ; | |
3559 | case ETH_RSS_HASH_XOR: | |
3560 | return 0; | |
3561 | case ETH_RSS_HASH_CRC32: | |
3562 | return 4; | |
3563 | } | |
3564 | ||
3565 | nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc); | |
3566 | return 0; | |
3567 | } | |
3568 | ||
4c352362 JK |
3569 | /** |
3570 | * nfp_net_rss_init() - Set the initial RSS parameters | |
3571 | * @nn: NFP Net device to reconfigure | |
3572 | */ | |
3573 | static void nfp_net_rss_init(struct nfp_net *nn) | |
3574 | { | |
9ff304bf JK |
3575 | unsigned long func_bit, rss_cap_hfunc; |
3576 | u32 reg; | |
3577 | ||
3578 | /* Read the RSS function capability and select first supported func */ | |
3579 | reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP); | |
3580 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg); | |
3581 | if (!rss_cap_hfunc) | |
3582 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, | |
3583 | NFP_NET_CFG_RSS_TOEPLITZ); | |
3584 | ||
3585 | func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS); | |
3586 | if (func_bit == NFP_NET_CFG_RSS_HFUNCS) { | |
79c12a75 | 3587 | dev_warn(nn->dp.dev, |
9ff304bf JK |
3588 | "Bad RSS config, defaulting to Toeplitz hash\n"); |
3589 | func_bit = ETH_RSS_HASH_TOP_BIT; | |
3590 | } | |
3591 | nn->rss_hfunc = 1 << func_bit; | |
3592 | ||
3593 | netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn)); | |
4c352362 | 3594 | |
1e9e10d0 | 3595 | nfp_net_rss_init_itbl(nn); |
4c352362 JK |
3596 | |
3597 | /* Enable IPv4/IPv6 TCP by default */ | |
3598 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
3599 | NFP_NET_CFG_RSS_IPV6_TCP | | |
9ff304bf | 3600 | FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) | |
4c352362 JK |
3601 | NFP_NET_CFG_RSS_MASK; |
3602 | } | |
3603 | ||
3604 | /** | |
3605 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
3606 | * @nn: NFP Net device to reconfigure | |
3607 | */ | |
3608 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
3609 | { | |
3610 | nn->rx_coalesce_usecs = 50; | |
3611 | nn->rx_coalesce_max_frames = 64; | |
3612 | nn->tx_coalesce_usecs = 50; | |
3613 | nn->tx_coalesce_max_frames = 64; | |
3614 | } | |
3615 | ||
a7b1ad08 | 3616 | static void nfp_net_netdev_init(struct nfp_net *nn) |
4c352362 | 3617 | { |
beba69ca | 3618 | struct net_device *netdev = nn->dp.netdev; |
611bdd49 | 3619 | |
9d372759 | 3620 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); |
4c352362 | 3621 | |
a7b1ad08 | 3622 | netdev->mtu = nn->dp.mtu; |
4c352362 JK |
3623 | |
3624 | /* Advertise/enable offloads based on capabilities | |
3625 | * | |
3626 | * Note: netdev->features show the currently enabled features | |
3627 | * and netdev->hw_features advertises which features are | |
3628 | * supported. By default we enable most features. | |
3629 | */ | |
9d372759 PC |
3630 | if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR) |
3631 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
3632 | ||
4c352362 | 3633 | netdev->hw_features = NETIF_F_HIGHDMA; |
ddb98d94 | 3634 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) { |
4c352362 | 3635 | netdev->hw_features |= NETIF_F_RXCSUM; |
ddb98d94 | 3636 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
3637 | } |
3638 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
3639 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
79c12a75 | 3640 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM; |
4c352362 JK |
3641 | } |
3642 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
3643 | netdev->hw_features |= NETIF_F_SG; | |
79c12a75 | 3644 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER; |
4c352362 | 3645 | } |
28063be6 EP |
3646 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || |
3647 | nn->cap & NFP_NET_CFG_CTRL_LSO2) { | |
4c352362 | 3648 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; |
28063be6 EP |
3649 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
3650 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 3651 | } |
a7b1ad08 | 3652 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) |
4c352362 | 3653 | netdev->hw_features |= NETIF_F_RXHASH; |
4c352362 JK |
3654 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && |
3655 | nn->cap & NFP_NET_CFG_CTRL_NVGRE) { | |
3656 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
3657 | netdev->hw_features |= NETIF_F_GSO_GRE | | |
3658 | NETIF_F_GSO_UDP_TUNNEL; | |
79c12a75 | 3659 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; |
4c352362 JK |
3660 | |
3661 | netdev->hw_enc_features = netdev->hw_features; | |
3662 | } | |
3663 | ||
3664 | netdev->vlan_features = netdev->hw_features; | |
3665 | ||
3666 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
3667 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
79c12a75 | 3668 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN; |
4c352362 JK |
3669 | } |
3670 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
28063be6 EP |
3671 | if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { |
3672 | nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); | |
3673 | } else { | |
3674 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
3675 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
3676 | } | |
4c352362 | 3677 | } |
b64052fc PC |
3678 | if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) { |
3679 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; | |
3680 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3681 | } | |
4c352362 JK |
3682 | |
3683 | netdev->features = netdev->hw_features; | |
3684 | ||
bb45e51c | 3685 | if (nfp_app_has_tc(nn->app)) |
7533fdc0 JK |
3686 | netdev->hw_features |= NETIF_F_HW_TC; |
3687 | ||
4c352362 JK |
3688 | /* Advertise but disable TSO by default. */ |
3689 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
28063be6 | 3690 | nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 | 3691 | |
a7b1ad08 JK |
3692 | /* Finalise the netdev setup */ |
3693 | netdev->netdev_ops = &nfp_net_netdev_ops; | |
3694 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
3695 | ||
8f15df60 SH |
3696 | SWITCHDEV_SET_OPS(netdev, &nfp_port_switchdev_ops); |
3697 | ||
a7b1ad08 JK |
3698 | /* MTU range: 68 - hw-specific max */ |
3699 | netdev->min_mtu = ETH_MIN_MTU; | |
3700 | netdev->max_mtu = nn->max_mtu; | |
3701 | ||
3702 | netif_carrier_off(netdev); | |
3703 | ||
3704 | nfp_net_set_ethtool_ops(netdev); | |
3705 | } | |
3706 | ||
3707 | /** | |
3708 | * nfp_net_init() - Initialise/finalise the nfp_net structure | |
3709 | * @nn: NFP Net device structure | |
3710 | * | |
3711 | * Return: 0 on success or negative errno on error. | |
3712 | */ | |
3713 | int nfp_net_init(struct nfp_net *nn) | |
3714 | { | |
3715 | int err; | |
3716 | ||
3717 | nn->dp.rx_dma_dir = DMA_FROM_DEVICE; | |
3718 | ||
3719 | /* Get some of the read-only fields from the BAR */ | |
3720 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
3721 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
3722 | ||
64a919a9 JK |
3723 | /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases |
3724 | * we allow use of non-chained metadata if RSS(v1) is the only | |
3725 | * advertised capability requiring metadata. | |
3726 | */ | |
a7b1ad08 | 3727 | nn->dp.chained_metadata_format = nn->fw_ver.major == 4 || |
77ece8d5 | 3728 | !nn->dp.netdev || |
64a919a9 | 3729 | !(nn->cap & NFP_NET_CFG_CTRL_RSS) || |
a7b1ad08 | 3730 | nn->cap & NFP_NET_CFG_CTRL_CHAIN_META; |
64a919a9 JK |
3731 | /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where |
3732 | * it has the same meaning as RSSv2. | |
3733 | */ | |
a7b1ad08 JK |
3734 | if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4) |
3735 | nn->cap &= ~NFP_NET_CFG_CTRL_RSS; | |
3736 | ||
3737 | /* Determine RX packet/metadata boundary offset */ | |
3738 | if (nn->fw_ver.major >= 2) { | |
3739 | u32 reg; | |
3740 | ||
3741 | reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
3742 | if (reg > NFP_NET_MAX_PREPEND) { | |
3743 | nn_err(nn, "Invalid rx offset: %d\n", reg); | |
3744 | return -EINVAL; | |
3745 | } | |
3746 | nn->dp.rx_offset = reg; | |
3747 | } else { | |
3748 | nn->dp.rx_offset = NFP_NET_RX_OFFSET; | |
3749 | } | |
3750 | ||
3751 | /* Set default MTU and Freelist buffer size */ | |
3752 | if (nn->max_mtu < NFP_NET_DEFAULT_MTU) | |
3753 | nn->dp.mtu = nn->max_mtu; | |
3754 | else | |
3755 | nn->dp.mtu = NFP_NET_DEFAULT_MTU; | |
3756 | nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp); | |
3757 | ||
3758 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { | |
3759 | nfp_net_rss_init(nn); | |
3760 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: | |
3761 | NFP_NET_CFG_CTRL_RSS; | |
3762 | } | |
3763 | ||
4c352362 JK |
3764 | /* Allow L2 Broadcast and Multicast through by default, if supported */ |
3765 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
79c12a75 | 3766 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC; |
4c352362 | 3767 | if (nn->cap & NFP_NET_CFG_CTRL_L2MC) |
79c12a75 | 3768 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2MC; |
4c352362 JK |
3769 | |
3770 | /* Allow IRQ moderation, if supported */ | |
3771 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
3772 | nfp_net_irqmod_init(nn); | |
79c12a75 | 3773 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; |
4c352362 JK |
3774 | } |
3775 | ||
a7b1ad08 JK |
3776 | if (nn->dp.netdev) |
3777 | nfp_net_netdev_init(nn); | |
3778 | ||
4c352362 JK |
3779 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
3780 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
3781 | ||
3782 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
3783 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
3784 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
3785 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
3786 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
3787 | NFP_NET_CFG_UPDATE_GEN); | |
3788 | if (err) | |
3789 | return err; | |
3790 | ||
beba69ca | 3791 | nfp_net_vecs_init(nn); |
4c352362 | 3792 | |
a7b1ad08 JK |
3793 | if (!nn->dp.netdev) |
3794 | return 0; | |
3795 | return register_netdev(nn->dp.netdev); | |
4c352362 JK |
3796 | } |
3797 | ||
3798 | /** | |
beba69ca JK |
3799 | * nfp_net_clean() - Undo what nfp_net_init() did. |
3800 | * @nn: NFP Net device structure | |
4c352362 | 3801 | */ |
beba69ca | 3802 | void nfp_net_clean(struct nfp_net *nn) |
4c352362 | 3803 | { |
a7b1ad08 JK |
3804 | if (!nn->dp.netdev) |
3805 | return; | |
3806 | ||
6f14f443 | 3807 | unregister_netdev(nn->dp.netdev); |
4c352362 | 3808 | } |