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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> | |
64 | ||
65 | #include <linux/ktime.h> | |
66 | ||
7533fdc0 | 67 | #include <net/pkt_cls.h> |
4c352362 JK |
68 | #include <net/vxlan.h> |
69 | ||
ce22f5a2 | 70 | #include "nfpcore/nfp_nsp.h" |
4c352362 JK |
71 | #include "nfp_net_ctrl.h" |
72 | #include "nfp_net.h" | |
eb488c26 | 73 | #include "nfp_port.h" |
4c352362 JK |
74 | |
75 | /** | |
76 | * nfp_net_get_fw_version() - Read and parse the FW version | |
77 | * @fw_ver: Output fw_version structure to read to | |
78 | * @ctrl_bar: Mapped address of the control BAR | |
79 | */ | |
80 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
81 | void __iomem *ctrl_bar) | |
82 | { | |
83 | u32 reg; | |
84 | ||
85 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
86 | put_unaligned_le32(reg, fw_ver); | |
87 | } | |
88 | ||
c487e6b1 | 89 | static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag) |
c0f031bc | 90 | { |
5cd4fbea JK |
91 | return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM, |
92 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
93 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
94 | } | |
95 | ||
96 | static void | |
97 | nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr) | |
98 | { | |
99 | dma_sync_single_for_device(dp->dev, dma_addr, | |
100 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
101 | dp->rx_dma_dir); | |
c0f031bc JK |
102 | } |
103 | ||
c487e6b1 | 104 | static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr) |
c0f031bc | 105 | { |
5cd4fbea JK |
106 | dma_unmap_single_attrs(dp->dev, dma_addr, |
107 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
108 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
109 | } | |
110 | ||
111 | static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr, | |
112 | unsigned int len) | |
113 | { | |
114 | dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM, | |
115 | len, dp->rx_dma_dir); | |
c0f031bc JK |
116 | } |
117 | ||
3d780b92 JK |
118 | /* Firmware reconfig |
119 | * | |
120 | * Firmware reconfig may take a while so we have two versions of it - | |
121 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
122 | * RTNL so we don't have to worry about serializing them. | |
123 | */ | |
124 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
125 | { | |
126 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
127 | /* ensure update is written before pinging HW */ | |
128 | nn_pci_flush(nn); | |
129 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
130 | } | |
131 | ||
132 | /* Pass 0 as update to run posted reconfigs. */ | |
133 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
134 | { | |
135 | update |= nn->reconfig_posted; | |
136 | nn->reconfig_posted = 0; | |
137 | ||
138 | nfp_net_reconfig_start(nn, update); | |
139 | ||
140 | nn->reconfig_timer_active = true; | |
141 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
142 | } | |
143 | ||
144 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
145 | { | |
146 | u32 reg; | |
147 | ||
148 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
149 | if (reg == 0) | |
150 | return true; | |
151 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
152 | nn_err(nn, "Reconfig error: 0x%08x\n", reg); | |
153 | return true; | |
154 | } else if (last_check) { | |
155 | nn_err(nn, "Reconfig timeout: 0x%08x\n", reg); | |
156 | return true; | |
157 | } | |
158 | ||
159 | return false; | |
160 | } | |
161 | ||
162 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
163 | { | |
164 | bool timed_out = false; | |
165 | ||
166 | /* Poll update field, waiting for NFP to ack the config */ | |
167 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { | |
168 | msleep(1); | |
169 | timed_out = time_is_before_eq_jiffies(deadline); | |
170 | } | |
171 | ||
172 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) | |
173 | return -EIO; | |
174 | ||
175 | return timed_out ? -EIO : 0; | |
176 | } | |
177 | ||
178 | static void nfp_net_reconfig_timer(unsigned long data) | |
179 | { | |
180 | struct nfp_net *nn = (void *)data; | |
181 | ||
182 | spin_lock_bh(&nn->reconfig_lock); | |
183 | ||
184 | nn->reconfig_timer_active = false; | |
185 | ||
186 | /* If sync caller is present it will take over from us */ | |
187 | if (nn->reconfig_sync_present) | |
188 | goto done; | |
189 | ||
190 | /* Read reconfig status and report errors */ | |
191 | nfp_net_reconfig_check_done(nn, true); | |
192 | ||
193 | if (nn->reconfig_posted) | |
194 | nfp_net_reconfig_start_async(nn, 0); | |
195 | done: | |
196 | spin_unlock_bh(&nn->reconfig_lock); | |
197 | } | |
198 | ||
199 | /** | |
200 | * nfp_net_reconfig_post() - Post async reconfig request | |
201 | * @nn: NFP Net device to reconfigure | |
202 | * @update: The value for the update field in the BAR config | |
203 | * | |
204 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
205 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
206 | * merged together! | |
207 | */ | |
208 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
209 | { | |
210 | spin_lock_bh(&nn->reconfig_lock); | |
211 | ||
212 | /* Sync caller will kick off async reconf when it's done, just post */ | |
213 | if (nn->reconfig_sync_present) { | |
214 | nn->reconfig_posted |= update; | |
215 | goto done; | |
216 | } | |
217 | ||
218 | /* Opportunistically check if the previous command is done */ | |
219 | if (!nn->reconfig_timer_active || | |
220 | nfp_net_reconfig_check_done(nn, false)) | |
221 | nfp_net_reconfig_start_async(nn, update); | |
222 | else | |
223 | nn->reconfig_posted |= update; | |
224 | done: | |
225 | spin_unlock_bh(&nn->reconfig_lock); | |
226 | } | |
227 | ||
4c352362 JK |
228 | /** |
229 | * nfp_net_reconfig() - Reconfigure the firmware | |
230 | * @nn: NFP Net device to reconfigure | |
231 | * @update: The value for the update field in the BAR config | |
232 | * | |
233 | * Write the update word to the BAR and ping the reconfig queue. The | |
234 | * poll until the firmware has acknowledged the update by zeroing the | |
235 | * update word. | |
236 | * | |
237 | * Return: Negative errno on error, 0 on success | |
238 | */ | |
239 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) | |
240 | { | |
3d780b92 JK |
241 | bool cancelled_timer = false; |
242 | u32 pre_posted_requests; | |
243 | int ret; | |
4c352362 JK |
244 | |
245 | spin_lock_bh(&nn->reconfig_lock); | |
246 | ||
3d780b92 | 247 | nn->reconfig_sync_present = true; |
4c352362 | 248 | |
3d780b92 JK |
249 | if (nn->reconfig_timer_active) { |
250 | del_timer(&nn->reconfig_timer); | |
251 | nn->reconfig_timer_active = false; | |
252 | cancelled_timer = true; | |
253 | } | |
254 | pre_posted_requests = nn->reconfig_posted; | |
255 | nn->reconfig_posted = 0; | |
256 | ||
257 | spin_unlock_bh(&nn->reconfig_lock); | |
258 | ||
259 | if (cancelled_timer) | |
260 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); | |
261 | ||
262 | /* Run the posted reconfigs which were issued before we started */ | |
263 | if (pre_posted_requests) { | |
264 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
265 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 JK |
266 | } |
267 | ||
3d780b92 JK |
268 | nfp_net_reconfig_start(nn, update); |
269 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
270 | ||
271 | spin_lock_bh(&nn->reconfig_lock); | |
272 | ||
273 | if (nn->reconfig_posted) | |
274 | nfp_net_reconfig_start_async(nn, 0); | |
275 | ||
276 | nn->reconfig_sync_present = false; | |
277 | ||
4c352362 | 278 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 279 | |
4c352362 JK |
280 | return ret; |
281 | } | |
282 | ||
283 | /* Interrupt configuration and handling | |
284 | */ | |
285 | ||
4c352362 JK |
286 | /** |
287 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
288 | * @nn: NFP Network structure | |
289 | * @entry_nr: MSI-X table entry | |
290 | * | |
416db5c1 | 291 | * Clear the ICR for the IRQ entry. |
4c352362 JK |
292 | */ |
293 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
294 | { | |
4c352362 JK |
295 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); |
296 | nn_pci_flush(nn); | |
297 | } | |
298 | ||
299 | /** | |
fdace6c2 JK |
300 | * nfp_net_irqs_alloc() - allocates MSI-X irqs |
301 | * @pdev: PCI device structure | |
302 | * @irq_entries: Array to be initialized and used to hold the irq entries | |
303 | * @min_irqs: Minimal acceptable number of interrupts | |
304 | * @wanted_irqs: Target number of interrupts to allocate | |
4c352362 | 305 | * |
fdace6c2 | 306 | * Return: Number of irqs obtained or 0 on error. |
4c352362 | 307 | */ |
fdace6c2 JK |
308 | unsigned int |
309 | nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, | |
310 | unsigned int min_irqs, unsigned int wanted_irqs) | |
4c352362 | 311 | { |
fdace6c2 JK |
312 | unsigned int i; |
313 | int got_irqs; | |
4c352362 | 314 | |
fdace6c2 JK |
315 | for (i = 0; i < wanted_irqs; i++) |
316 | irq_entries[i].entry = i; | |
4c352362 | 317 | |
fdace6c2 JK |
318 | got_irqs = pci_enable_msix_range(pdev, irq_entries, |
319 | min_irqs, wanted_irqs); | |
320 | if (got_irqs < 0) { | |
321 | dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n", | |
322 | min_irqs, wanted_irqs, got_irqs); | |
4c352362 JK |
323 | return 0; |
324 | } | |
325 | ||
fdace6c2 JK |
326 | if (got_irqs < wanted_irqs) |
327 | dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n", | |
328 | wanted_irqs, got_irqs); | |
329 | ||
330 | return got_irqs; | |
4c352362 JK |
331 | } |
332 | ||
4c352362 | 333 | /** |
fdace6c2 JK |
334 | * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev |
335 | * @nn: NFP Network structure | |
336 | * @irq_entries: Table of allocated interrupts | |
337 | * @n: Size of @irq_entries (number of entries to grab) | |
4c352362 | 338 | * |
fdace6c2 JK |
339 | * After interrupts are allocated with nfp_net_irqs_alloc() this function |
340 | * should be called to assign them to a specific netdev (port). | |
4c352362 | 341 | */ |
fdace6c2 JK |
342 | void |
343 | nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, | |
344 | unsigned int n) | |
4c352362 | 345 | { |
79c12a75 JK |
346 | struct nfp_net_dp *dp = &nn->dp; |
347 | ||
b33ae997 | 348 | nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS; |
79c12a75 | 349 | dp->num_r_vecs = nn->max_r_vecs; |
4c352362 | 350 | |
fdace6c2 | 351 | memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n); |
4c352362 | 352 | |
79c12a75 JK |
353 | if (dp->num_rx_rings > dp->num_r_vecs || |
354 | dp->num_tx_rings > dp->num_r_vecs) | |
87232d96 JK |
355 | dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n", |
356 | dp->num_rx_rings, dp->num_tx_rings, | |
357 | dp->num_r_vecs); | |
fdace6c2 | 358 | |
79c12a75 JK |
359 | dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings); |
360 | dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings); | |
361 | dp->num_stack_tx_rings = dp->num_tx_rings; | |
4c352362 JK |
362 | } |
363 | ||
364 | /** | |
365 | * nfp_net_irqs_disable() - Disable interrupts | |
fdace6c2 | 366 | * @pdev: PCI device structure |
4c352362 JK |
367 | * |
368 | * Undoes what @nfp_net_irqs_alloc() does. | |
369 | */ | |
fdace6c2 | 370 | void nfp_net_irqs_disable(struct pci_dev *pdev) |
4c352362 | 371 | { |
fdace6c2 | 372 | pci_disable_msix(pdev); |
4c352362 JK |
373 | } |
374 | ||
375 | /** | |
376 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
377 | * @irq: Interrupt | |
378 | * @data: Opaque data structure | |
379 | * | |
380 | * Return: Indicate if the interrupt has been handled. | |
381 | */ | |
382 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
383 | { | |
384 | struct nfp_net_r_vector *r_vec = data; | |
385 | ||
386 | napi_schedule_irqoff(&r_vec->napi); | |
387 | ||
388 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
389 | * the MSI-X table or via the per entry ICR field. So there | |
390 | * is no need to disable interrupts here. | |
391 | */ | |
392 | return IRQ_HANDLED; | |
393 | } | |
394 | ||
395 | /** | |
396 | * nfp_net_read_link_status() - Reread link status from control BAR | |
397 | * @nn: NFP Network structure | |
398 | */ | |
399 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
400 | { | |
401 | unsigned long flags; | |
402 | bool link_up; | |
403 | u32 sts; | |
404 | ||
405 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
406 | ||
407 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
408 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
409 | ||
410 | if (nn->link_up == link_up) | |
411 | goto out; | |
412 | ||
413 | nn->link_up = link_up; | |
6d4f8cba JK |
414 | if (nn->port) |
415 | set_bit(NFP_PORT_CHANGED, &nn->port->flags); | |
4c352362 JK |
416 | |
417 | if (nn->link_up) { | |
79c12a75 JK |
418 | netif_carrier_on(nn->dp.netdev); |
419 | netdev_info(nn->dp.netdev, "NIC Link is Up\n"); | |
4c352362 | 420 | } else { |
79c12a75 JK |
421 | netif_carrier_off(nn->dp.netdev); |
422 | netdev_info(nn->dp.netdev, "NIC Link is Down\n"); | |
4c352362 JK |
423 | } |
424 | out: | |
425 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
426 | } | |
427 | ||
428 | /** | |
429 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
430 | * @irq: Interrupt | |
431 | * @data: Opaque data structure | |
432 | * | |
433 | * Return: Indicate if the interrupt has been handled. | |
434 | */ | |
435 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
436 | { | |
437 | struct nfp_net *nn = data; | |
fdace6c2 JK |
438 | struct msix_entry *entry; |
439 | ||
440 | entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX]; | |
4c352362 JK |
441 | |
442 | nfp_net_read_link_status(nn); | |
443 | ||
fdace6c2 | 444 | nfp_net_irq_unmask(nn, entry->entry); |
4c352362 JK |
445 | |
446 | return IRQ_HANDLED; | |
447 | } | |
448 | ||
449 | /** | |
450 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
451 | * @irq: Interrupt | |
452 | * @data: Opaque data structure | |
453 | * | |
454 | * Return: Indicate if the interrupt has been handled. | |
455 | */ | |
456 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
457 | { | |
458 | struct nfp_net *nn = data; | |
459 | ||
460 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
461 | /* XXX TO BE IMPLEMENTED */ | |
462 | return IRQ_HANDLED; | |
463 | } | |
464 | ||
465 | /** | |
466 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
467 | * @tx_ring: TX ring structure | |
d79737c2 JK |
468 | * @r_vec: IRQ vector servicing this ring |
469 | * @idx: Ring index | |
92e68195 | 470 | * @is_xdp: Is this an XDP TX ring? |
4c352362 | 471 | */ |
d79737c2 JK |
472 | static void |
473 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
92e68195 JK |
474 | struct nfp_net_r_vector *r_vec, unsigned int idx, |
475 | bool is_xdp) | |
4c352362 | 476 | { |
4c352362 JK |
477 | struct nfp_net *nn = r_vec->nfp_net; |
478 | ||
d79737c2 JK |
479 | tx_ring->idx = idx; |
480 | tx_ring->r_vec = r_vec; | |
92e68195 | 481 | tx_ring->is_xdp = is_xdp; |
d79737c2 | 482 | |
4c352362 JK |
483 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
484 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
485 | } | |
486 | ||
487 | /** | |
488 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
489 | * @rx_ring: RX ring structure | |
d79737c2 JK |
490 | * @r_vec: IRQ vector servicing this ring |
491 | * @idx: Ring index | |
4c352362 | 492 | */ |
d79737c2 JK |
493 | static void |
494 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
495 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 496 | { |
4c352362 JK |
497 | struct nfp_net *nn = r_vec->nfp_net; |
498 | ||
d79737c2 JK |
499 | rx_ring->idx = idx; |
500 | rx_ring->r_vec = r_vec; | |
501 | ||
4c352362 | 502 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
4c352362 | 503 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); |
4c352362 JK |
504 | } |
505 | ||
506 | /** | |
fdace6c2 | 507 | * nfp_net_vecs_init() - Assign IRQs and setup rvecs. |
beba69ca | 508 | * @nn: NFP Network structure |
4c352362 | 509 | */ |
beba69ca | 510 | static void nfp_net_vecs_init(struct nfp_net *nn) |
4c352362 | 511 | { |
4c352362 JK |
512 | struct nfp_net_r_vector *r_vec; |
513 | int r; | |
514 | ||
4c352362 JK |
515 | nn->lsc_handler = nfp_net_irq_lsc; |
516 | nn->exn_handler = nfp_net_irq_exn; | |
517 | ||
164d1e9e | 518 | for (r = 0; r < nn->max_r_vecs; r++) { |
fdace6c2 JK |
519 | struct msix_entry *entry; |
520 | ||
521 | entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r]; | |
522 | ||
4c352362 JK |
523 | r_vec = &nn->r_vecs[r]; |
524 | r_vec->nfp_net = nn; | |
525 | r_vec->handler = nfp_net_irq_rxtx; | |
fdace6c2 JK |
526 | r_vec->irq_entry = entry->entry; |
527 | r_vec->irq_vector = entry->vector; | |
4c352362 JK |
528 | |
529 | cpumask_set_cpu(r, &r_vec->affinity_mask); | |
4c352362 JK |
530 | } |
531 | } | |
532 | ||
533 | /** | |
534 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
535 | * @nn: NFP Network structure | |
536 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
537 | * @format: printf-style format to construct the interrupt name | |
538 | * @name: Pointer to allocated space for interrupt name | |
539 | * @name_sz: Size of space for interrupt name | |
540 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
541 | * @handler: IRQ handler to register for this interrupt | |
542 | */ | |
543 | static int | |
544 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
545 | const char *format, char *name, size_t name_sz, | |
546 | unsigned int vector_idx, irq_handler_t handler) | |
547 | { | |
548 | struct msix_entry *entry; | |
549 | int err; | |
550 | ||
551 | entry = &nn->irq_entries[vector_idx]; | |
552 | ||
79c12a75 | 553 | snprintf(name, name_sz, format, netdev_name(nn->dp.netdev)); |
4c352362 JK |
554 | err = request_irq(entry->vector, handler, 0, name, nn); |
555 | if (err) { | |
556 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
557 | entry->vector, err); | |
558 | return err; | |
559 | } | |
fdace6c2 | 560 | nn_writeb(nn, ctrl_offset, entry->entry); |
4c352362 JK |
561 | |
562 | return 0; | |
563 | } | |
564 | ||
565 | /** | |
566 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
567 | * @nn: NFP Network structure | |
568 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
569 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
570 | */ | |
571 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
572 | unsigned int vector_idx) | |
573 | { | |
574 | nn_writeb(nn, ctrl_offset, 0xff); | |
575 | free_irq(nn->irq_entries[vector_idx].vector, nn); | |
576 | } | |
577 | ||
578 | /* Transmit | |
579 | * | |
580 | * One queue controller peripheral queue is used for transmit. The | |
581 | * driver en-queues packets for transmit by advancing the write | |
582 | * pointer. The device indicates that packets have transmitted by | |
583 | * advancing the read pointer. The driver maintains a local copy of | |
584 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
585 | * keeps @wr_p in sync with the queue controller write pointer and can | |
586 | * determine how many packets have been transmitted by comparing its | |
587 | * copy of the read pointer @rd_p with the read pointer maintained by | |
588 | * the queue controller peripheral. | |
589 | */ | |
590 | ||
591 | /** | |
592 | * nfp_net_tx_full() - Check if the TX ring is full | |
593 | * @tx_ring: TX ring to check | |
594 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
595 | * | |
596 | * This function checks, based on the *host copy* of read/write | |
597 | * pointer if a given TX ring is full. The real TX queue may have | |
598 | * some newly made available slots. | |
599 | * | |
600 | * Return: True if the ring is full. | |
601 | */ | |
fa95f1d2 | 602 | static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) |
4c352362 JK |
603 | { |
604 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
605 | } | |
606 | ||
607 | /* Wrappers for deciding when to stop and restart TX queues */ | |
608 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
609 | { | |
610 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
611 | } | |
612 | ||
613 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
614 | { | |
615 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
616 | } | |
617 | ||
618 | /** | |
619 | * nfp_net_tx_ring_stop() - stop tx ring | |
620 | * @nd_q: netdev queue | |
621 | * @tx_ring: driver tx queue structure | |
622 | * | |
623 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
624 | * someone else may be cleaning the TX ring completions so we need to be | |
625 | * extra careful here. | |
626 | */ | |
627 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
628 | struct nfp_net_tx_ring *tx_ring) | |
629 | { | |
630 | netif_tx_stop_queue(nd_q); | |
631 | ||
632 | /* We can race with the TX completion out of NAPI so recheck */ | |
633 | smp_mb(); | |
634 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
635 | netif_tx_start_queue(nd_q); | |
636 | } | |
637 | ||
638 | /** | |
639 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
4c352362 JK |
640 | * @r_vec: per-ring structure |
641 | * @txbuf: Pointer to driver soft TX descriptor | |
642 | * @txd: Pointer to HW TX descriptor | |
643 | * @skb: Pointer to SKB | |
644 | * | |
645 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
646 | * Return error on packet header greater than maximum supported LSO header size. | |
647 | */ | |
79c12a75 | 648 | static void nfp_net_tx_tso(struct nfp_net_r_vector *r_vec, |
4c352362 JK |
649 | struct nfp_net_tx_buf *txbuf, |
650 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
651 | { | |
652 | u32 hdrlen; | |
653 | u16 mss; | |
654 | ||
655 | if (!skb_is_gso(skb)) | |
656 | return; | |
657 | ||
28063be6 EP |
658 | if (!skb->encapsulation) { |
659 | txd->l3_offset = skb_network_offset(skb); | |
660 | txd->l4_offset = skb_transport_offset(skb); | |
4c352362 | 661 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); |
28063be6 EP |
662 | } else { |
663 | txd->l3_offset = skb_inner_network_offset(skb); | |
664 | txd->l4_offset = skb_inner_transport_offset(skb); | |
4c352362 JK |
665 | hdrlen = skb_inner_transport_header(skb) - skb->data + |
666 | inner_tcp_hdrlen(skb); | |
28063be6 | 667 | } |
4c352362 JK |
668 | |
669 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
670 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
671 | ||
672 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
e53fc9fa | 673 | txd->lso_hdrlen = hdrlen; |
4c352362 JK |
674 | txd->mss = cpu_to_le16(mss); |
675 | txd->flags |= PCIE_DESC_TX_LSO; | |
676 | ||
677 | u64_stats_update_begin(&r_vec->tx_sync); | |
678 | r_vec->tx_lso++; | |
679 | u64_stats_update_end(&r_vec->tx_sync); | |
680 | } | |
681 | ||
682 | /** | |
683 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
79c12a75 | 684 | * @dp: NFP Net data path struct |
4c352362 JK |
685 | * @r_vec: per-ring structure |
686 | * @txbuf: Pointer to driver soft TX descriptor | |
687 | * @txd: Pointer to TX descriptor | |
688 | * @skb: Pointer to SKB | |
689 | * | |
690 | * This function sets the TX checksum flags in the TX descriptor based | |
691 | * on the configuration and the protocol of the packet to be transmitted. | |
692 | */ | |
79c12a75 JK |
693 | static void nfp_net_tx_csum(struct nfp_net_dp *dp, |
694 | struct nfp_net_r_vector *r_vec, | |
4c352362 JK |
695 | struct nfp_net_tx_buf *txbuf, |
696 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
697 | { | |
698 | struct ipv6hdr *ipv6h; | |
699 | struct iphdr *iph; | |
700 | u8 l4_hdr; | |
701 | ||
79c12a75 | 702 | if (!(dp->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) |
4c352362 JK |
703 | return; |
704 | ||
705 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
706 | return; | |
707 | ||
708 | txd->flags |= PCIE_DESC_TX_CSUM; | |
709 | if (skb->encapsulation) | |
710 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
711 | ||
712 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
713 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
714 | ||
715 | if (iph->version == 4) { | |
716 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
717 | l4_hdr = iph->protocol; | |
718 | } else if (ipv6h->version == 6) { | |
719 | l4_hdr = ipv6h->nexthdr; | |
720 | } else { | |
79c12a75 | 721 | nn_dp_warn(dp, "partial checksum but ipv=%x!\n", iph->version); |
4c352362 JK |
722 | return; |
723 | } | |
724 | ||
725 | switch (l4_hdr) { | |
726 | case IPPROTO_TCP: | |
727 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
728 | break; | |
729 | case IPPROTO_UDP: | |
730 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
731 | break; | |
732 | default: | |
79c12a75 | 733 | nn_dp_warn(dp, "partial checksum but l4 proto=%x!\n", l4_hdr); |
4c352362 JK |
734 | return; |
735 | } | |
736 | ||
737 | u64_stats_update_begin(&r_vec->tx_sync); | |
738 | if (skb->encapsulation) | |
739 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
740 | else | |
741 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
742 | u64_stats_update_end(&r_vec->tx_sync); | |
743 | } | |
744 | ||
ecd63a02 JK |
745 | static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) |
746 | { | |
747 | wmb(); | |
748 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
749 | tx_ring->wr_ptr_add = 0; | |
750 | } | |
751 | ||
4c352362 JK |
752 | /** |
753 | * nfp_net_tx() - Main transmit entry point | |
754 | * @skb: SKB to transmit | |
755 | * @netdev: netdev structure | |
756 | * | |
757 | * Return: NETDEV_TX_OK on success. | |
758 | */ | |
759 | static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) | |
760 | { | |
761 | struct nfp_net *nn = netdev_priv(netdev); | |
762 | const struct skb_frag_struct *frag; | |
4c352362 | 763 | struct nfp_net_tx_desc *txd, txdg; |
4c352362 | 764 | struct nfp_net_tx_ring *tx_ring; |
bef6b1b7 JK |
765 | struct nfp_net_r_vector *r_vec; |
766 | struct nfp_net_tx_buf *txbuf; | |
4c352362 | 767 | struct netdev_queue *nd_q; |
79c12a75 | 768 | struct nfp_net_dp *dp; |
4c352362 JK |
769 | dma_addr_t dma_addr; |
770 | unsigned int fsize; | |
771 | int f, nr_frags; | |
772 | int wr_idx; | |
773 | u16 qidx; | |
774 | ||
79c12a75 | 775 | dp = &nn->dp; |
4c352362 | 776 | qidx = skb_get_queue_mapping(skb); |
79c12a75 | 777 | tx_ring = &dp->tx_rings[qidx]; |
4c352362 | 778 | r_vec = tx_ring->r_vec; |
79c12a75 | 779 | nd_q = netdev_get_tx_queue(dp->netdev, qidx); |
4c352362 JK |
780 | |
781 | nr_frags = skb_shinfo(skb)->nr_frags; | |
782 | ||
783 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
79c12a75 JK |
784 | nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n", |
785 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
4c352362 | 786 | netif_tx_stop_queue(nd_q); |
28b0cfee | 787 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
788 | u64_stats_update_begin(&r_vec->tx_sync); |
789 | r_vec->tx_busy++; | |
790 | u64_stats_update_end(&r_vec->tx_sync); | |
791 | return NETDEV_TX_BUSY; | |
792 | } | |
793 | ||
794 | /* Start with the head skbuf */ | |
79c12a75 | 795 | dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), |
4c352362 | 796 | DMA_TO_DEVICE); |
79c12a75 | 797 | if (dma_mapping_error(dp->dev, dma_addr)) |
4c352362 JK |
798 | goto err_free; |
799 | ||
4aa3b766 | 800 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
4c352362 JK |
801 | |
802 | /* Stash the soft descriptor of the head then initialize it */ | |
803 | txbuf = &tx_ring->txbufs[wr_idx]; | |
804 | txbuf->skb = skb; | |
805 | txbuf->dma_addr = dma_addr; | |
806 | txbuf->fidx = -1; | |
807 | txbuf->pkt_cnt = 1; | |
808 | txbuf->real_len = skb->len; | |
809 | ||
810 | /* Build TX descriptor */ | |
811 | txd = &tx_ring->txds[wr_idx]; | |
812 | txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0; | |
813 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
814 | nfp_desc_set_dma_addr(txd, dma_addr); | |
815 | txd->data_len = cpu_to_le16(skb->len); | |
816 | ||
817 | txd->flags = 0; | |
818 | txd->mss = 0; | |
e53fc9fa | 819 | txd->lso_hdrlen = 0; |
4c352362 | 820 | |
28063be6 | 821 | /* Do not reorder - tso may adjust pkt cnt, vlan may override fields */ |
79c12a75 | 822 | nfp_net_tx_tso(r_vec, txbuf, txd, skb); |
79c12a75 | 823 | nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb); |
79c12a75 | 824 | if (skb_vlan_tag_present(skb) && dp->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { |
4c352362 JK |
825 | txd->flags |= PCIE_DESC_TX_VLAN; |
826 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
827 | } | |
828 | ||
829 | /* Gather DMA */ | |
830 | if (nr_frags > 0) { | |
831 | /* all descs must match except for in addr, length and eop */ | |
832 | txdg = *txd; | |
833 | ||
834 | for (f = 0; f < nr_frags; f++) { | |
835 | frag = &skb_shinfo(skb)->frags[f]; | |
836 | fsize = skb_frag_size(frag); | |
837 | ||
79c12a75 | 838 | dma_addr = skb_frag_dma_map(dp->dev, frag, 0, |
4c352362 | 839 | fsize, DMA_TO_DEVICE); |
79c12a75 | 840 | if (dma_mapping_error(dp->dev, dma_addr)) |
4c352362 JK |
841 | goto err_unmap; |
842 | ||
4aa3b766 | 843 | wr_idx = D_IDX(tx_ring, wr_idx + 1); |
4c352362 JK |
844 | tx_ring->txbufs[wr_idx].skb = skb; |
845 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
846 | tx_ring->txbufs[wr_idx].fidx = f; | |
847 | ||
848 | txd = &tx_ring->txds[wr_idx]; | |
849 | *txd = txdg; | |
850 | txd->dma_len = cpu_to_le16(fsize); | |
851 | nfp_desc_set_dma_addr(txd, dma_addr); | |
852 | txd->offset_eop = | |
853 | (f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0; | |
854 | } | |
855 | ||
856 | u64_stats_update_begin(&r_vec->tx_sync); | |
857 | r_vec->tx_gather++; | |
858 | u64_stats_update_end(&r_vec->tx_sync); | |
859 | } | |
860 | ||
861 | netdev_tx_sent_queue(nd_q, txbuf->real_len); | |
862 | ||
863 | tx_ring->wr_p += nr_frags + 1; | |
864 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
865 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
866 | ||
867 | tx_ring->wr_ptr_add += nr_frags + 1; | |
ecd63a02 JK |
868 | if (!skb->xmit_more || netif_xmit_stopped(nd_q)) |
869 | nfp_net_tx_xmit_more_flush(tx_ring); | |
4c352362 JK |
870 | |
871 | skb_tx_timestamp(skb); | |
872 | ||
873 | return NETDEV_TX_OK; | |
874 | ||
875 | err_unmap: | |
876 | --f; | |
877 | while (f >= 0) { | |
878 | frag = &skb_shinfo(skb)->frags[f]; | |
79c12a75 | 879 | dma_unmap_page(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
880 | skb_frag_size(frag), DMA_TO_DEVICE); |
881 | tx_ring->txbufs[wr_idx].skb = NULL; | |
882 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
883 | tx_ring->txbufs[wr_idx].fidx = -2; | |
884 | wr_idx = wr_idx - 1; | |
885 | if (wr_idx < 0) | |
886 | wr_idx += tx_ring->cnt; | |
887 | } | |
79c12a75 | 888 | dma_unmap_single(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
889 | skb_headlen(skb), DMA_TO_DEVICE); |
890 | tx_ring->txbufs[wr_idx].skb = NULL; | |
891 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
892 | tx_ring->txbufs[wr_idx].fidx = -2; | |
893 | err_free: | |
79c12a75 | 894 | nn_dp_warn(dp, "Failed to map DMA TX buffer\n"); |
28b0cfee | 895 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
896 | u64_stats_update_begin(&r_vec->tx_sync); |
897 | r_vec->tx_errors++; | |
898 | u64_stats_update_end(&r_vec->tx_sync); | |
899 | dev_kfree_skb_any(skb); | |
900 | return NETDEV_TX_OK; | |
901 | } | |
902 | ||
903 | /** | |
904 | * nfp_net_tx_complete() - Handled completed TX packets | |
905 | * @tx_ring: TX ring structure | |
906 | * | |
907 | * Return: Number of completed TX descriptors | |
908 | */ | |
909 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring) | |
910 | { | |
911 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 912 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 JK |
913 | const struct skb_frag_struct *frag; |
914 | struct netdev_queue *nd_q; | |
915 | u32 done_pkts = 0, done_bytes = 0; | |
916 | struct sk_buff *skb; | |
917 | int todo, nr_frags; | |
918 | u32 qcp_rd_p; | |
919 | int fidx; | |
920 | int idx; | |
921 | ||
d38df0d3 JK |
922 | if (tx_ring->wr_p == tx_ring->rd_p) |
923 | return; | |
924 | ||
4c352362 JK |
925 | /* Work out how many descriptors have been transmitted */ |
926 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
927 | ||
928 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
929 | return; | |
930 | ||
770f0cea | 931 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
4c352362 JK |
932 | |
933 | while (todo--) { | |
4aa3b766 | 934 | idx = D_IDX(tx_ring, tx_ring->rd_p++); |
4c352362 JK |
935 | |
936 | skb = tx_ring->txbufs[idx].skb; | |
937 | if (!skb) | |
938 | continue; | |
939 | ||
940 | nr_frags = skb_shinfo(skb)->nr_frags; | |
941 | fidx = tx_ring->txbufs[idx].fidx; | |
942 | ||
943 | if (fidx == -1) { | |
944 | /* unmap head */ | |
79c12a75 | 945 | dma_unmap_single(dp->dev, tx_ring->txbufs[idx].dma_addr, |
4c352362 JK |
946 | skb_headlen(skb), DMA_TO_DEVICE); |
947 | ||
948 | done_pkts += tx_ring->txbufs[idx].pkt_cnt; | |
949 | done_bytes += tx_ring->txbufs[idx].real_len; | |
950 | } else { | |
951 | /* unmap fragment */ | |
952 | frag = &skb_shinfo(skb)->frags[fidx]; | |
79c12a75 | 953 | dma_unmap_page(dp->dev, tx_ring->txbufs[idx].dma_addr, |
4c352362 JK |
954 | skb_frag_size(frag), DMA_TO_DEVICE); |
955 | } | |
956 | ||
957 | /* check for last gather fragment */ | |
958 | if (fidx == nr_frags - 1) | |
959 | dev_kfree_skb_any(skb); | |
960 | ||
961 | tx_ring->txbufs[idx].dma_addr = 0; | |
962 | tx_ring->txbufs[idx].skb = NULL; | |
963 | tx_ring->txbufs[idx].fidx = -2; | |
964 | } | |
965 | ||
966 | tx_ring->qcp_rd_p = qcp_rd_p; | |
967 | ||
968 | u64_stats_update_begin(&r_vec->tx_sync); | |
969 | r_vec->tx_bytes += done_bytes; | |
970 | r_vec->tx_pkts += done_pkts; | |
971 | u64_stats_update_end(&r_vec->tx_sync); | |
972 | ||
79c12a75 | 973 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
974 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); |
975 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
976 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
977 | smp_mb(); | |
978 | ||
979 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
980 | netif_tx_wake_queue(nd_q); | |
981 | } | |
982 | ||
983 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
984 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
985 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
986 | } | |
987 | ||
abeeec4a | 988 | static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring) |
ecd63a02 JK |
989 | { |
990 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
ecd63a02 | 991 | u32 done_pkts = 0, done_bytes = 0; |
abeeec4a | 992 | bool done_all; |
ecd63a02 JK |
993 | int idx, todo; |
994 | u32 qcp_rd_p; | |
995 | ||
996 | /* Work out how many descriptors have been transmitted */ | |
997 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
998 | ||
999 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
abeeec4a | 1000 | return true; |
ecd63a02 | 1001 | |
770f0cea | 1002 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
ecd63a02 | 1003 | |
abeeec4a JK |
1004 | done_all = todo <= NFP_NET_XDP_MAX_COMPLETE; |
1005 | todo = min(todo, NFP_NET_XDP_MAX_COMPLETE); | |
1006 | ||
4aa3b766 | 1007 | tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo); |
abeeec4a | 1008 | |
92e68195 | 1009 | done_pkts = todo; |
ecd63a02 | 1010 | while (todo--) { |
4aa3b766 | 1011 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 JK |
1012 | tx_ring->rd_p++; |
1013 | ||
ecd63a02 | 1014 | done_bytes += tx_ring->txbufs[idx].real_len; |
ecd63a02 JK |
1015 | } |
1016 | ||
ecd63a02 JK |
1017 | u64_stats_update_begin(&r_vec->tx_sync); |
1018 | r_vec->tx_bytes += done_bytes; | |
1019 | r_vec->tx_pkts += done_pkts; | |
1020 | u64_stats_update_end(&r_vec->tx_sync); | |
1021 | ||
1022 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
abeeec4a | 1023 | "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", |
ecd63a02 | 1024 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); |
abeeec4a JK |
1025 | |
1026 | return done_all; | |
ecd63a02 JK |
1027 | } |
1028 | ||
4c352362 | 1029 | /** |
827deea9 | 1030 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
79c12a75 | 1031 | * @dp: NFP Net data path struct |
827deea9 | 1032 | * @tx_ring: TX ring structure |
4c352362 JK |
1033 | * |
1034 | * Assumes that the device is stopped | |
1035 | */ | |
827deea9 | 1036 | static void |
79c12a75 | 1037 | nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 | 1038 | { |
4c352362 | 1039 | const struct skb_frag_struct *frag; |
ecd63a02 | 1040 | struct netdev_queue *nd_q; |
4c352362 | 1041 | |
92e68195 | 1042 | while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) { |
ecd63a02 | 1043 | struct nfp_net_tx_buf *tx_buf; |
92e68195 JK |
1044 | struct sk_buff *skb; |
1045 | int idx, nr_frags; | |
4c352362 | 1046 | |
4aa3b766 | 1047 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 | 1048 | tx_buf = &tx_ring->txbufs[idx]; |
827deea9 | 1049 | |
92e68195 JK |
1050 | skb = tx_ring->txbufs[idx].skb; |
1051 | nr_frags = skb_shinfo(skb)->nr_frags; | |
4c352362 | 1052 | |
92e68195 JK |
1053 | if (tx_buf->fidx == -1) { |
1054 | /* unmap head */ | |
1055 | dma_unmap_single(dp->dev, tx_buf->dma_addr, | |
1056 | skb_headlen(skb), DMA_TO_DEVICE); | |
1057 | } else { | |
1058 | /* unmap fragment */ | |
1059 | frag = &skb_shinfo(skb)->frags[tx_buf->fidx]; | |
1060 | dma_unmap_page(dp->dev, tx_buf->dma_addr, | |
1061 | skb_frag_size(frag), DMA_TO_DEVICE); | |
ecd63a02 | 1062 | } |
827deea9 | 1063 | |
92e68195 JK |
1064 | /* check for last gather fragment */ |
1065 | if (tx_buf->fidx == nr_frags - 1) | |
1066 | dev_kfree_skb_any(skb); | |
1067 | ||
ecd63a02 JK |
1068 | tx_buf->dma_addr = 0; |
1069 | tx_buf->skb = NULL; | |
1070 | tx_buf->fidx = -2; | |
4c352362 JK |
1071 | |
1072 | tx_ring->qcp_rd_p++; | |
1073 | tx_ring->rd_p++; | |
1074 | } | |
1075 | ||
827deea9 JK |
1076 | memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt); |
1077 | tx_ring->wr_p = 0; | |
1078 | tx_ring->rd_p = 0; | |
1079 | tx_ring->qcp_rd_p = 0; | |
1080 | tx_ring->wr_ptr_add = 0; | |
1081 | ||
92e68195 | 1082 | if (tx_ring->is_xdp) |
ecd63a02 JK |
1083 | return; |
1084 | ||
79c12a75 | 1085 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
1086 | netdev_tx_reset_queue(nd_q); |
1087 | } | |
1088 | ||
1089 | static void nfp_net_tx_timeout(struct net_device *netdev) | |
1090 | { | |
1091 | struct nfp_net *nn = netdev_priv(netdev); | |
1092 | int i; | |
1093 | ||
79c12a75 | 1094 | for (i = 0; i < nn->dp.netdev->real_num_tx_queues; i++) { |
4c352362 JK |
1095 | if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i))) |
1096 | continue; | |
1097 | nn_warn(nn, "TX timeout on ring: %d\n", i); | |
1098 | } | |
1099 | nn_warn(nn, "TX watchdog timeout\n"); | |
1100 | } | |
1101 | ||
1102 | /* Receive processing | |
1103 | */ | |
bf187ea0 | 1104 | static unsigned int |
76e1e1a8 | 1105 | nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) |
bf187ea0 JK |
1106 | { |
1107 | unsigned int fl_bufsz; | |
1108 | ||
c0f031bc | 1109 | fl_bufsz = NFP_NET_RX_BUF_HEADROOM; |
6fe0c3b4 | 1110 | fl_bufsz += dp->rx_dma_off; |
79c12a75 | 1111 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
c0f031bc | 1112 | fl_bufsz += NFP_NET_MAX_PREPEND; |
bf187ea0 | 1113 | else |
79c12a75 | 1114 | fl_bufsz += dp->rx_offset; |
76e1e1a8 | 1115 | fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu; |
bf187ea0 | 1116 | |
c0f031bc JK |
1117 | fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); |
1118 | fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
1119 | ||
bf187ea0 JK |
1120 | return fl_bufsz; |
1121 | } | |
4c352362 | 1122 | |
ecd63a02 JK |
1123 | static void |
1124 | nfp_net_free_frag(void *frag, bool xdp) | |
1125 | { | |
1126 | if (!xdp) | |
1127 | skb_free_frag(frag); | |
1128 | else | |
1129 | __free_page(virt_to_page(frag)); | |
1130 | } | |
1131 | ||
4c352362 | 1132 | /** |
c0f031bc | 1133 | * nfp_net_rx_alloc_one() - Allocate and map page frag for RX |
783496b0 | 1134 | * @dp: NFP Net data path struct |
4c352362 JK |
1135 | * @dma_addr: Pointer to storage for DMA address (output param) |
1136 | * | |
c0f031bc | 1137 | * This function will allcate a new page frag, map it for DMA. |
4c352362 | 1138 | * |
c0f031bc | 1139 | * Return: allocated page frag or NULL on failure. |
4c352362 | 1140 | */ |
d78005a5 | 1141 | static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
4c352362 | 1142 | { |
c0f031bc | 1143 | void *frag; |
4c352362 | 1144 | |
9dc6b116 | 1145 | if (!dp->xdp_prog) |
2195c263 | 1146 | frag = netdev_alloc_frag(dp->fl_bufsz); |
ecd63a02 JK |
1147 | else |
1148 | frag = page_address(alloc_page(GFP_KERNEL | __GFP_COLD)); | |
c0f031bc | 1149 | if (!frag) { |
79c12a75 | 1150 | nn_dp_warn(dp, "Failed to alloc receive page frag\n"); |
4c352362 JK |
1151 | return NULL; |
1152 | } | |
1153 | ||
c487e6b1 | 1154 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 | 1155 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
9dc6b116 | 1156 | nfp_net_free_frag(frag, dp->xdp_prog); |
79c12a75 | 1157 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); |
4c352362 JK |
1158 | return NULL; |
1159 | } | |
1160 | ||
c0f031bc | 1161 | return frag; |
4c352362 JK |
1162 | } |
1163 | ||
c487e6b1 | 1164 | static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
b64b7bb6 JK |
1165 | { |
1166 | void *frag; | |
1167 | ||
79c12a75 JK |
1168 | if (!dp->xdp_prog) |
1169 | frag = napi_alloc_frag(dp->fl_bufsz); | |
ecd63a02 JK |
1170 | else |
1171 | frag = page_address(alloc_page(GFP_ATOMIC | __GFP_COLD)); | |
b64b7bb6 | 1172 | if (!frag) { |
79c12a75 | 1173 | nn_dp_warn(dp, "Failed to alloc receive page frag\n"); |
b64b7bb6 JK |
1174 | return NULL; |
1175 | } | |
1176 | ||
c487e6b1 | 1177 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 JK |
1178 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
1179 | nfp_net_free_frag(frag, dp->xdp_prog); | |
1180 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); | |
b64b7bb6 JK |
1181 | return NULL; |
1182 | } | |
1183 | ||
1184 | return frag; | |
1185 | } | |
1186 | ||
4c352362 JK |
1187 | /** |
1188 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
6fe0c3b4 | 1189 | * @dp: NFP Net data path struct |
4c352362 | 1190 | * @rx_ring: RX ring structure |
c0f031bc | 1191 | * @frag: page fragment buffer |
4c352362 JK |
1192 | * @dma_addr: DMA address of skb mapping |
1193 | */ | |
6fe0c3b4 JK |
1194 | static void nfp_net_rx_give_one(const struct nfp_net_dp *dp, |
1195 | struct nfp_net_rx_ring *rx_ring, | |
c0f031bc | 1196 | void *frag, dma_addr_t dma_addr) |
4c352362 JK |
1197 | { |
1198 | unsigned int wr_idx; | |
1199 | ||
4aa3b766 | 1200 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
4c352362 | 1201 | |
5cd4fbea JK |
1202 | nfp_net_dma_sync_dev_rx(dp, dma_addr); |
1203 | ||
4c352362 | 1204 | /* Stash SKB and DMA address away */ |
c0f031bc | 1205 | rx_ring->rxbufs[wr_idx].frag = frag; |
4c352362 JK |
1206 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; |
1207 | ||
1208 | /* Fill freelist descriptor */ | |
1209 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1210 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
6fe0c3b4 JK |
1211 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, |
1212 | dma_addr + dp->rx_dma_off); | |
4c352362 JK |
1213 | |
1214 | rx_ring->wr_p++; | |
9ed9ea70 | 1215 | if (!(rx_ring->wr_p % NFP_NET_FL_BATCH)) { |
4c352362 JK |
1216 | /* Update write pointer of the freelist queue. Make |
1217 | * sure all writes are flushed before telling the hardware. | |
1218 | */ | |
1219 | wmb(); | |
9ed9ea70 | 1220 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, NFP_NET_FL_BATCH); |
4c352362 JK |
1221 | } |
1222 | } | |
1223 | ||
1224 | /** | |
1934680f JK |
1225 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1226 | * @rx_ring: RX ring structure | |
4c352362 | 1227 | * |
1934680f JK |
1228 | * Warning: Do *not* call if ring buffers were never put on the FW freelist |
1229 | * (i.e. device was not enabled)! | |
4c352362 | 1230 | */ |
1934680f | 1231 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1232 | { |
1934680f | 1233 | unsigned int wr_idx, last_idx; |
4c352362 | 1234 | |
1934680f | 1235 | /* Move the empty entry to the end of the list */ |
4aa3b766 | 1236 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
1934680f JK |
1237 | last_idx = rx_ring->cnt - 1; |
1238 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
c0f031bc | 1239 | rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag; |
1934680f | 1240 | rx_ring->rxbufs[last_idx].dma_addr = 0; |
c0f031bc | 1241 | rx_ring->rxbufs[last_idx].frag = NULL; |
4c352362 | 1242 | |
1934680f JK |
1243 | memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt); |
1244 | rx_ring->wr_p = 0; | |
1245 | rx_ring->rd_p = 0; | |
1934680f | 1246 | } |
4c352362 | 1247 | |
1934680f JK |
1248 | /** |
1249 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
79c12a75 | 1250 | * @dp: NFP Net data path struct |
1934680f JK |
1251 | * @rx_ring: RX ring to remove buffers from |
1252 | * | |
1253 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1254 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1255 | * to restore required ring geometry. | |
1256 | */ | |
1257 | static void | |
79c12a75 | 1258 | nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, |
9dc6b116 | 1259 | struct nfp_net_rx_ring *rx_ring) |
1934680f | 1260 | { |
1934680f | 1261 | unsigned int i; |
4c352362 | 1262 | |
1934680f JK |
1263 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1264 | /* NULL skb can only happen when initial filling of the ring | |
1265 | * fails to allocate enough buffers and calls here to free | |
1266 | * already allocated ones. | |
1267 | */ | |
c0f031bc | 1268 | if (!rx_ring->rxbufs[i].frag) |
1934680f JK |
1269 | continue; |
1270 | ||
c487e6b1 | 1271 | nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr); |
9dc6b116 | 1272 | nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog); |
1934680f | 1273 | rx_ring->rxbufs[i].dma_addr = 0; |
c0f031bc | 1274 | rx_ring->rxbufs[i].frag = NULL; |
4c352362 JK |
1275 | } |
1276 | } | |
1277 | ||
1278 | /** | |
1934680f | 1279 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
79c12a75 | 1280 | * @dp: NFP Net data path struct |
1934680f | 1281 | * @rx_ring: RX ring to remove buffers from |
4c352362 | 1282 | */ |
1934680f | 1283 | static int |
79c12a75 | 1284 | nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, |
9dc6b116 | 1285 | struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1286 | { |
1934680f JK |
1287 | struct nfp_net_rx_buf *rxbufs; |
1288 | unsigned int i; | |
1289 | ||
1290 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1291 | |
1934680f | 1292 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
d78005a5 | 1293 | rxbufs[i].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr); |
c0f031bc | 1294 | if (!rxbufs[i].frag) { |
9dc6b116 | 1295 | nfp_net_rx_ring_bufs_free(dp, rx_ring); |
4c352362 JK |
1296 | return -ENOMEM; |
1297 | } | |
4c352362 JK |
1298 | } |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
1934680f JK |
1303 | /** |
1304 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
6fe0c3b4 | 1305 | * @dp: NFP Net data path struct |
1934680f JK |
1306 | * @rx_ring: RX ring to fill |
1307 | */ | |
6fe0c3b4 JK |
1308 | static void |
1309 | nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp, | |
1310 | struct nfp_net_rx_ring *rx_ring) | |
1934680f JK |
1311 | { |
1312 | unsigned int i; | |
1313 | ||
1314 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
6fe0c3b4 | 1315 | nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag, |
1934680f JK |
1316 | rx_ring->rxbufs[i].dma_addr); |
1317 | } | |
1318 | ||
4c352362 JK |
1319 | /** |
1320 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1321 | * @flags: RX descriptor flags field in CPU byte order | |
1322 | */ | |
1323 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1324 | { | |
1325 | u16 csum_all_checked, csum_all_ok; | |
1326 | ||
1327 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1328 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1329 | ||
1330 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1331 | } | |
1332 | ||
1333 | /** | |
1334 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
79c12a75 | 1335 | * @dp: NFP Net data path struct |
4c352362 JK |
1336 | * @r_vec: per-ring structure |
1337 | * @rxd: Pointer to RX descriptor | |
ddb98d94 | 1338 | * @meta: Parsed metadata prepend |
4c352362 JK |
1339 | * @skb: Pointer to SKB |
1340 | */ | |
79c12a75 JK |
1341 | static void nfp_net_rx_csum(struct nfp_net_dp *dp, |
1342 | struct nfp_net_r_vector *r_vec, | |
ddb98d94 JK |
1343 | struct nfp_net_rx_desc *rxd, |
1344 | struct nfp_meta_parsed *meta, struct sk_buff *skb) | |
4c352362 JK |
1345 | { |
1346 | skb_checksum_none_assert(skb); | |
1347 | ||
79c12a75 | 1348 | if (!(dp->netdev->features & NETIF_F_RXCSUM)) |
4c352362 JK |
1349 | return; |
1350 | ||
ddb98d94 JK |
1351 | if (meta->csum_type) { |
1352 | skb->ip_summed = meta->csum_type; | |
1353 | skb->csum = meta->csum; | |
1354 | u64_stats_update_begin(&r_vec->rx_sync); | |
1355 | r_vec->hw_csum_rx_ok++; | |
1356 | u64_stats_update_end(&r_vec->rx_sync); | |
1357 | return; | |
1358 | } | |
1359 | ||
4c352362 JK |
1360 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { |
1361 | u64_stats_update_begin(&r_vec->rx_sync); | |
1362 | r_vec->hw_csum_rx_error++; | |
1363 | u64_stats_update_end(&r_vec->rx_sync); | |
1364 | return; | |
1365 | } | |
1366 | ||
1367 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1368 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1369 | * checksum as CSUM_OK. | |
1370 | */ | |
1371 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1372 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1373 | __skb_incr_checksum_unnecessary(skb); | |
1374 | u64_stats_update_begin(&r_vec->rx_sync); | |
1375 | r_vec->hw_csum_rx_ok++; | |
1376 | u64_stats_update_end(&r_vec->rx_sync); | |
1377 | } | |
1378 | ||
1379 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1380 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1381 | __skb_incr_checksum_unnecessary(skb); | |
1382 | u64_stats_update_begin(&r_vec->rx_sync); | |
1383 | r_vec->hw_csum_rx_inner_ok++; | |
1384 | u64_stats_update_end(&r_vec->rx_sync); | |
1385 | } | |
1386 | } | |
1387 | ||
e524a6a9 JK |
1388 | static void |
1389 | nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta, | |
1390 | unsigned int type, __be32 *hash) | |
4c352362 | 1391 | { |
19d0f54e | 1392 | if (!(netdev->features & NETIF_F_RXHASH)) |
4c352362 JK |
1393 | return; |
1394 | ||
19d0f54e | 1395 | switch (type) { |
4c352362 JK |
1396 | case NFP_NET_RSS_IPV4: |
1397 | case NFP_NET_RSS_IPV6: | |
1398 | case NFP_NET_RSS_IPV6_EX: | |
e524a6a9 | 1399 | meta->hash_type = PKT_HASH_TYPE_L3; |
4c352362 JK |
1400 | break; |
1401 | default: | |
e524a6a9 | 1402 | meta->hash_type = PKT_HASH_TYPE_L4; |
4c352362 JK |
1403 | break; |
1404 | } | |
e524a6a9 JK |
1405 | |
1406 | meta->hash = get_unaligned_be32(hash); | |
4c352362 JK |
1407 | } |
1408 | ||
19d0f54e | 1409 | static void |
e524a6a9 | 1410 | nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta, |
b92fb77f | 1411 | void *data, struct nfp_net_rx_desc *rxd) |
19d0f54e | 1412 | { |
b92fb77f | 1413 | struct nfp_net_rx_hash *rx_hash = data; |
19d0f54e JK |
1414 | |
1415 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) | |
1416 | return; | |
1417 | ||
e524a6a9 | 1418 | nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type), |
19d0f54e JK |
1419 | &rx_hash->hash); |
1420 | } | |
1421 | ||
1422 | static void * | |
e524a6a9 | 1423 | nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, |
b92fb77f | 1424 | void *data, int meta_len) |
19d0f54e | 1425 | { |
19d0f54e JK |
1426 | u32 meta_info; |
1427 | ||
1428 | meta_info = get_unaligned_be32(data); | |
1429 | data += 4; | |
1430 | ||
1431 | while (meta_info) { | |
1432 | switch (meta_info & NFP_NET_META_FIELD_MASK) { | |
1433 | case NFP_NET_META_HASH: | |
1434 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
e524a6a9 | 1435 | nfp_net_set_hash(netdev, meta, |
19d0f54e JK |
1436 | meta_info & NFP_NET_META_FIELD_MASK, |
1437 | (__be32 *)data); | |
1438 | data += 4; | |
1439 | break; | |
1440 | case NFP_NET_META_MARK: | |
e524a6a9 | 1441 | meta->mark = get_unaligned_be32(data); |
19d0f54e JK |
1442 | data += 4; |
1443 | break; | |
ddb98d94 JK |
1444 | case NFP_NET_META_CSUM: |
1445 | meta->csum_type = CHECKSUM_COMPLETE; | |
1446 | meta->csum = | |
1447 | (__force __wsum)__get_unaligned_cpu32(data); | |
1448 | data += 4; | |
1449 | break; | |
19d0f54e JK |
1450 | default: |
1451 | return NULL; | |
1452 | } | |
1453 | ||
1454 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1455 | } | |
1456 | ||
1457 | return data; | |
1458 | } | |
1459 | ||
e9949aeb | 1460 | static void |
6fe0c3b4 JK |
1461 | nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, |
1462 | struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, | |
1463 | struct sk_buff *skb) | |
e9949aeb JK |
1464 | { |
1465 | u64_stats_update_begin(&r_vec->rx_sync); | |
1466 | r_vec->rx_drops++; | |
1467 | u64_stats_update_end(&r_vec->rx_sync); | |
1468 | ||
c0f031bc JK |
1469 | /* skb is build based on the frag, free_skb() would free the frag |
1470 | * so to be able to reuse it we need an extra ref. | |
1471 | */ | |
1472 | if (skb && rxbuf && skb->head == rxbuf->frag) | |
1473 | page_ref_inc(virt_to_head_page(rxbuf->frag)); | |
e9949aeb | 1474 | if (rxbuf) |
6fe0c3b4 | 1475 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr); |
e9949aeb JK |
1476 | if (skb) |
1477 | dev_kfree_skb_any(skb); | |
1478 | } | |
1479 | ||
a67edbf4 | 1480 | static bool |
79c12a75 | 1481 | nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, |
ecd63a02 | 1482 | struct nfp_net_tx_ring *tx_ring, |
1abae319 | 1483 | struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, |
abeeec4a | 1484 | unsigned int pkt_len, bool *completed) |
ecd63a02 JK |
1485 | { |
1486 | struct nfp_net_tx_buf *txbuf; | |
1487 | struct nfp_net_tx_desc *txd; | |
ecd63a02 JK |
1488 | int wr_idx; |
1489 | ||
1490 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
abeeec4a JK |
1491 | if (!*completed) { |
1492 | nfp_net_xdp_complete(tx_ring); | |
1493 | *completed = true; | |
1494 | } | |
1495 | ||
1496 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
1497 | nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf, | |
1498 | NULL); | |
1499 | return false; | |
1500 | } | |
ecd63a02 JK |
1501 | } |
1502 | ||
4aa3b766 | 1503 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
ecd63a02 JK |
1504 | |
1505 | /* Stash the soft descriptor of the head then initialize it */ | |
1506 | txbuf = &tx_ring->txbufs[wr_idx]; | |
92e68195 JK |
1507 | |
1508 | nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr); | |
1509 | ||
ecd63a02 JK |
1510 | txbuf->frag = rxbuf->frag; |
1511 | txbuf->dma_addr = rxbuf->dma_addr; | |
1512 | txbuf->fidx = -1; | |
1513 | txbuf->pkt_cnt = 1; | |
1514 | txbuf->real_len = pkt_len; | |
1515 | ||
1abae319 | 1516 | dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off, |
d58cebb7 | 1517 | pkt_len, DMA_BIDIRECTIONAL); |
ecd63a02 JK |
1518 | |
1519 | /* Build TX descriptor */ | |
1520 | txd = &tx_ring->txds[wr_idx]; | |
1521 | txd->offset_eop = PCIE_DESC_TX_EOP; | |
1522 | txd->dma_len = cpu_to_le16(pkt_len); | |
1abae319 | 1523 | nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off); |
ecd63a02 JK |
1524 | txd->data_len = cpu_to_le16(pkt_len); |
1525 | ||
1526 | txd->flags = 0; | |
1527 | txd->mss = 0; | |
e53fc9fa | 1528 | txd->lso_hdrlen = 0; |
ecd63a02 JK |
1529 | |
1530 | tx_ring->wr_p++; | |
1531 | tx_ring->wr_ptr_add++; | |
a67edbf4 | 1532 | return true; |
ecd63a02 JK |
1533 | } |
1534 | ||
6fe0c3b4 JK |
1535 | static int nfp_net_run_xdp(struct bpf_prog *prog, void *data, void *hard_start, |
1536 | unsigned int *off, unsigned int *len) | |
ecd63a02 JK |
1537 | { |
1538 | struct xdp_buff xdp; | |
6fe0c3b4 JK |
1539 | void *orig_data; |
1540 | int ret; | |
1541 | ||
1542 | xdp.data_hard_start = hard_start; | |
1543 | xdp.data = data + *off; | |
1544 | xdp.data_end = data + *off + *len; | |
ecd63a02 | 1545 | |
6fe0c3b4 JK |
1546 | orig_data = xdp.data; |
1547 | ret = bpf_prog_run_xdp(prog, &xdp); | |
ecd63a02 | 1548 | |
6fe0c3b4 JK |
1549 | *len -= xdp.data - orig_data; |
1550 | *off += xdp.data - orig_data; | |
1551 | ||
1552 | return ret; | |
ecd63a02 JK |
1553 | } |
1554 | ||
4c352362 JK |
1555 | /** |
1556 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1557 | * @rx_ring: RX ring to receive from | |
1558 | * @budget: NAPI budget | |
1559 | * | |
1560 | * Note, this function is separated out from the napi poll function to | |
1561 | * more cleanly separate packet receive code from other bookkeeping | |
1562 | * functions performed in the napi poll function. | |
1563 | * | |
4c352362 JK |
1564 | * Return: Number of packets received. |
1565 | */ | |
1566 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1567 | { | |
1568 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 1569 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
ecd63a02 JK |
1570 | struct nfp_net_tx_ring *tx_ring; |
1571 | struct bpf_prog *xdp_prog; | |
abeeec4a | 1572 | bool xdp_tx_cmpl = false; |
ecd63a02 | 1573 | unsigned int true_bufsz; |
c0f031bc | 1574 | struct sk_buff *skb; |
416db5c1 | 1575 | int pkts_polled = 0; |
4c352362 JK |
1576 | int idx; |
1577 | ||
ecd63a02 | 1578 | rcu_read_lock(); |
79c12a75 | 1579 | xdp_prog = READ_ONCE(dp->xdp_prog); |
79c12a75 | 1580 | true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; |
ecd63a02 JK |
1581 | tx_ring = r_vec->xdp_ring; |
1582 | ||
416db5c1 | 1583 | while (pkts_polled < budget) { |
5cd4fbea | 1584 | unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; |
13df4c66 JK |
1585 | struct nfp_net_rx_buf *rxbuf; |
1586 | struct nfp_net_rx_desc *rxd; | |
e524a6a9 | 1587 | struct nfp_meta_parsed meta; |
13df4c66 JK |
1588 | dma_addr_t new_dma_addr; |
1589 | void *new_frag; | |
1590 | ||
4aa3b766 | 1591 | idx = D_IDX(rx_ring, rx_ring->rd_p); |
4c352362 JK |
1592 | |
1593 | rxd = &rx_ring->rxds[idx]; | |
416db5c1 | 1594 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) |
4c352362 | 1595 | break; |
416db5c1 | 1596 | |
4c352362 JK |
1597 | /* Memory barrier to ensure that we won't do other reads |
1598 | * before the DD bit. | |
1599 | */ | |
1600 | dma_rmb(); | |
1601 | ||
e524a6a9 JK |
1602 | memset(&meta, 0, sizeof(meta)); |
1603 | ||
4c352362 JK |
1604 | rx_ring->rd_p++; |
1605 | pkts_polled++; | |
4c352362 | 1606 | |
c0f031bc | 1607 | rxbuf = &rx_ring->rxbufs[idx]; |
180012dc JK |
1608 | /* < meta_len > |
1609 | * <-- [rx_offset] --> | |
1610 | * --------------------------------------------------------- | |
1611 | * | [XX] | metadata | packet | XXXX | | |
1612 | * --------------------------------------------------------- | |
1613 | * <---------------- data_len ---------------> | |
1614 | * | |
1615 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1616 | * on a packet by packet basis. If rx_offset is set to zero | |
1617 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1618 | * buffer and is immediately followed by the packet (no [XX]). | |
1619 | */ | |
4c352362 JK |
1620 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1621 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
13df4c66 | 1622 | pkt_len = data_len - meta_len; |
4c352362 | 1623 | |
5cd4fbea | 1624 | pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; |
79c12a75 | 1625 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
5cd4fbea | 1626 | pkt_off += meta_len; |
180012dc | 1627 | else |
5cd4fbea JK |
1628 | pkt_off += dp->rx_offset; |
1629 | meta_off = pkt_off - meta_len; | |
4c352362 | 1630 | |
4c352362 JK |
1631 | /* Stats update */ |
1632 | u64_stats_update_begin(&r_vec->rx_sync); | |
1633 | r_vec->rx_pkts++; | |
13df4c66 | 1634 | r_vec->rx_bytes += pkt_len; |
4c352362 JK |
1635 | u64_stats_update_end(&r_vec->rx_sync); |
1636 | ||
b92fb77f JK |
1637 | if (unlikely(meta_len > NFP_NET_MAX_PREPEND || |
1638 | (dp->rx_offset && meta_len > dp->rx_offset))) { | |
1639 | nn_dp_warn(dp, "oversized RX packet metadata %u\n", | |
1640 | meta_len); | |
6fe0c3b4 | 1641 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
b92fb77f JK |
1642 | continue; |
1643 | } | |
1644 | ||
5cd4fbea JK |
1645 | nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, |
1646 | data_len); | |
1647 | ||
e524a6a9 JK |
1648 | if (!dp->chained_metadata_format) { |
1649 | nfp_net_set_hash_desc(dp->netdev, &meta, | |
1650 | rxbuf->frag + meta_off, rxd); | |
1651 | } else if (meta_len) { | |
1652 | void *end; | |
1653 | ||
1654 | end = nfp_net_parse_meta(dp->netdev, &meta, | |
1655 | rxbuf->frag + meta_off, | |
1656 | meta_len); | |
1657 | if (unlikely(end != rxbuf->frag + pkt_off)) { | |
1658 | nn_dp_warn(dp, "invalid RX packet metadata\n"); | |
1659 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, | |
1660 | NULL); | |
1661 | continue; | |
1662 | } | |
1663 | } | |
1664 | ||
6d677075 | 1665 | if (xdp_prog && !(rxd->rxd.flags & PCIE_DESC_RX_BPF && |
79c12a75 | 1666 | dp->bpf_offload_xdp)) { |
1abae319 | 1667 | unsigned int dma_off; |
6fe0c3b4 | 1668 | void *hard_start; |
ecd63a02 JK |
1669 | int act; |
1670 | ||
6fe0c3b4 | 1671 | hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM; |
6fe0c3b4 | 1672 | |
6fe0c3b4 | 1673 | act = nfp_net_run_xdp(xdp_prog, rxbuf->frag, hard_start, |
5cd4fbea | 1674 | &pkt_off, &pkt_len); |
ecd63a02 JK |
1675 | switch (act) { |
1676 | case XDP_PASS: | |
1677 | break; | |
1678 | case XDP_TX: | |
5cd4fbea | 1679 | dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM; |
79c12a75 | 1680 | if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring, |
a67edbf4 | 1681 | tx_ring, rxbuf, |
1abae319 | 1682 | dma_off, |
abeeec4a JK |
1683 | pkt_len, |
1684 | &xdp_tx_cmpl))) | |
79c12a75 JK |
1685 | trace_xdp_exception(dp->netdev, |
1686 | xdp_prog, act); | |
ecd63a02 JK |
1687 | continue; |
1688 | default: | |
1689 | bpf_warn_invalid_xdp_action(act); | |
1690 | case XDP_ABORTED: | |
79c12a75 | 1691 | trace_xdp_exception(dp->netdev, xdp_prog, act); |
ecd63a02 | 1692 | case XDP_DROP: |
6fe0c3b4 | 1693 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, |
ecd63a02 JK |
1694 | rxbuf->dma_addr); |
1695 | continue; | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | skb = build_skb(rxbuf->frag, true_bufsz); | |
13df4c66 | 1700 | if (unlikely(!skb)) { |
6fe0c3b4 | 1701 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
13df4c66 JK |
1702 | continue; |
1703 | } | |
c487e6b1 | 1704 | new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); |
13df4c66 | 1705 | if (unlikely(!new_frag)) { |
6fe0c3b4 | 1706 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); |
13df4c66 JK |
1707 | continue; |
1708 | } | |
1709 | ||
c487e6b1 | 1710 | nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); |
13df4c66 | 1711 | |
6fe0c3b4 | 1712 | nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); |
13df4c66 | 1713 | |
5cd4fbea | 1714 | skb_reserve(skb, pkt_off); |
13df4c66 JK |
1715 | skb_put(skb, pkt_len); |
1716 | ||
e524a6a9 JK |
1717 | skb->mark = meta.mark; |
1718 | skb_set_hash(skb, meta.hash, meta.hash_type); | |
19d0f54e | 1719 | |
4c352362 | 1720 | skb_record_rx_queue(skb, rx_ring->idx); |
79c12a75 | 1721 | skb->protocol = eth_type_trans(skb, dp->netdev); |
4c352362 | 1722 | |
ddb98d94 | 1723 | nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb); |
4c352362 JK |
1724 | |
1725 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) | |
1726 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
1727 | le16_to_cpu(rxd->rxd.vlan)); | |
1728 | ||
1729 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
1730 | } | |
1731 | ||
abeeec4a JK |
1732 | if (xdp_prog) { |
1733 | if (tx_ring->wr_ptr_add) | |
1734 | nfp_net_tx_xmit_more_flush(tx_ring); | |
1735 | else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) && | |
1736 | !xdp_tx_cmpl) | |
1737 | if (!nfp_net_xdp_complete(tx_ring)) | |
1738 | pkts_polled = budget; | |
1739 | } | |
ecd63a02 JK |
1740 | rcu_read_unlock(); |
1741 | ||
4c352362 JK |
1742 | return pkts_polled; |
1743 | } | |
1744 | ||
1745 | /** | |
1746 | * nfp_net_poll() - napi poll function | |
1747 | * @napi: NAPI structure | |
1748 | * @budget: NAPI budget | |
1749 | * | |
1750 | * Return: number of packets polled. | |
1751 | */ | |
1752 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
1753 | { | |
1754 | struct nfp_net_r_vector *r_vec = | |
1755 | container_of(napi, struct nfp_net_r_vector, napi); | |
cbeaf7aa | 1756 | unsigned int pkts_polled = 0; |
4c352362 | 1757 | |
cbeaf7aa JK |
1758 | if (r_vec->tx_ring) |
1759 | nfp_net_tx_complete(r_vec->tx_ring); | |
abeeec4a | 1760 | if (r_vec->rx_ring) |
cbeaf7aa | 1761 | pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); |
4c352362 | 1762 | |
7de5f115 JK |
1763 | if (pkts_polled < budget) |
1764 | if (napi_complete_done(napi, pkts_polled)) | |
1765 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); | |
4c352362 JK |
1766 | |
1767 | return pkts_polled; | |
1768 | } | |
1769 | ||
1770 | /* Setup and Configuration | |
1771 | */ | |
1772 | ||
1773 | /** | |
1774 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
1775 | * @tx_ring: TX ring to free | |
1776 | */ | |
1777 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
1778 | { | |
1779 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 1780 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 1781 | |
4c352362 JK |
1782 | kfree(tx_ring->txbufs); |
1783 | ||
1784 | if (tx_ring->txds) | |
79c12a75 | 1785 | dma_free_coherent(dp->dev, tx_ring->size, |
4c352362 JK |
1786 | tx_ring->txds, tx_ring->dma); |
1787 | ||
1788 | tx_ring->cnt = 0; | |
4c352362 JK |
1789 | tx_ring->txbufs = NULL; |
1790 | tx_ring->txds = NULL; | |
1791 | tx_ring->dma = 0; | |
1792 | tx_ring->size = 0; | |
1793 | } | |
1794 | ||
1795 | /** | |
1796 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
892a7f70 | 1797 | * @dp: NFP Net data path struct |
4c352362 JK |
1798 | * @tx_ring: TX Ring structure to allocate |
1799 | * | |
1800 | * Return: 0 on success, negative errno otherwise. | |
1801 | */ | |
ecd63a02 | 1802 | static int |
92e68195 | 1803 | nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 JK |
1804 | { |
1805 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
4c352362 JK |
1806 | int sz; |
1807 | ||
892a7f70 | 1808 | tx_ring->cnt = dp->txd_cnt; |
4c352362 JK |
1809 | |
1810 | tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt; | |
79c12a75 | 1811 | tx_ring->txds = dma_zalloc_coherent(dp->dev, tx_ring->size, |
4c352362 JK |
1812 | &tx_ring->dma, GFP_KERNEL); |
1813 | if (!tx_ring->txds) | |
1814 | goto err_alloc; | |
1815 | ||
1816 | sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt; | |
1817 | tx_ring->txbufs = kzalloc(sz, GFP_KERNEL); | |
1818 | if (!tx_ring->txbufs) | |
1819 | goto err_alloc; | |
1820 | ||
92e68195 | 1821 | if (!tx_ring->is_xdp) |
79c12a75 | 1822 | netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask, |
ecd63a02 | 1823 | tx_ring->idx); |
4c352362 | 1824 | |
4c352362 JK |
1825 | return 0; |
1826 | ||
1827 | err_alloc: | |
1828 | nfp_net_tx_ring_free(tx_ring); | |
1829 | return -ENOMEM; | |
1830 | } | |
1831 | ||
92e68195 JK |
1832 | static void |
1833 | nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp, | |
1834 | struct nfp_net_tx_ring *tx_ring) | |
1835 | { | |
1836 | unsigned int i; | |
1837 | ||
1838 | if (!tx_ring->is_xdp) | |
1839 | return; | |
1840 | ||
1841 | for (i = 0; i < tx_ring->cnt; i++) { | |
1842 | if (!tx_ring->txbufs[i].frag) | |
1843 | return; | |
1844 | ||
1845 | nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr); | |
1846 | __free_page(virt_to_page(tx_ring->txbufs[i].frag)); | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | static int | |
1851 | nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp, | |
1852 | struct nfp_net_tx_ring *tx_ring) | |
1853 | { | |
1854 | struct nfp_net_tx_buf *txbufs = tx_ring->txbufs; | |
1855 | unsigned int i; | |
1856 | ||
1857 | if (!tx_ring->is_xdp) | |
1858 | return 0; | |
1859 | ||
1860 | for (i = 0; i < tx_ring->cnt; i++) { | |
1861 | txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr); | |
1862 | if (!txbufs[i].frag) { | |
1863 | nfp_net_tx_ring_bufs_free(dp, tx_ring); | |
1864 | return -ENOMEM; | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | return 0; | |
1869 | } | |
1870 | ||
892a7f70 | 1871 | static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
cc7c0333 | 1872 | { |
cc7c0333 JK |
1873 | unsigned int r; |
1874 | ||
892a7f70 JK |
1875 | dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings), |
1876 | GFP_KERNEL); | |
1877 | if (!dp->tx_rings) | |
1878 | return -ENOMEM; | |
cc7c0333 | 1879 | |
892a7f70 | 1880 | for (r = 0; r < dp->num_tx_rings; r++) { |
ecd63a02 JK |
1881 | int bias = 0; |
1882 | ||
512e94dc JK |
1883 | if (r >= dp->num_stack_tx_rings) |
1884 | bias = dp->num_stack_tx_rings; | |
cc7c0333 | 1885 | |
892a7f70 | 1886 | nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias], |
92e68195 | 1887 | r, bias); |
ecd63a02 | 1888 | |
92e68195 | 1889 | if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r])) |
cc7c0333 | 1890 | goto err_free_prev; |
92e68195 JK |
1891 | |
1892 | if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r])) | |
1893 | goto err_free_ring; | |
cc7c0333 JK |
1894 | } |
1895 | ||
892a7f70 | 1896 | return 0; |
cc7c0333 JK |
1897 | |
1898 | err_free_prev: | |
92e68195 JK |
1899 | while (r--) { |
1900 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
1901 | err_free_ring: | |
892a7f70 | 1902 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 1903 | } |
892a7f70 JK |
1904 | kfree(dp->tx_rings); |
1905 | return -ENOMEM; | |
cc7c0333 JK |
1906 | } |
1907 | ||
892a7f70 | 1908 | static void nfp_net_tx_rings_free(struct nfp_net_dp *dp) |
cc7c0333 JK |
1909 | { |
1910 | unsigned int r; | |
1911 | ||
92e68195 JK |
1912 | for (r = 0; r < dp->num_tx_rings; r++) { |
1913 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
892a7f70 | 1914 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 1915 | } |
cc7c0333 | 1916 | |
892a7f70 | 1917 | kfree(dp->tx_rings); |
cc7c0333 JK |
1918 | } |
1919 | ||
4c352362 JK |
1920 | /** |
1921 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
1922 | * @rx_ring: RX ring to free | |
1923 | */ | |
1924 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
1925 | { | |
1926 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 1927 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 1928 | |
4c352362 JK |
1929 | kfree(rx_ring->rxbufs); |
1930 | ||
1931 | if (rx_ring->rxds) | |
79c12a75 | 1932 | dma_free_coherent(dp->dev, rx_ring->size, |
4c352362 JK |
1933 | rx_ring->rxds, rx_ring->dma); |
1934 | ||
1935 | rx_ring->cnt = 0; | |
4c352362 JK |
1936 | rx_ring->rxbufs = NULL; |
1937 | rx_ring->rxds = NULL; | |
1938 | rx_ring->dma = 0; | |
1939 | rx_ring->size = 0; | |
1940 | } | |
1941 | ||
1942 | /** | |
1943 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
2195c263 | 1944 | * @dp: NFP Net data path struct |
4c352362 JK |
1945 | * @rx_ring: RX ring to allocate |
1946 | * | |
1947 | * Return: 0 on success, negative errno otherwise. | |
1948 | */ | |
30d21171 | 1949 | static int |
892a7f70 | 1950 | nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1951 | { |
4c352362 JK |
1952 | int sz; |
1953 | ||
892a7f70 | 1954 | rx_ring->cnt = dp->rxd_cnt; |
4c352362 | 1955 | rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt; |
79c12a75 | 1956 | rx_ring->rxds = dma_zalloc_coherent(dp->dev, rx_ring->size, |
4c352362 JK |
1957 | &rx_ring->dma, GFP_KERNEL); |
1958 | if (!rx_ring->rxds) | |
1959 | goto err_alloc; | |
1960 | ||
1961 | sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt; | |
1962 | rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL); | |
1963 | if (!rx_ring->rxbufs) | |
1964 | goto err_alloc; | |
1965 | ||
4c352362 JK |
1966 | return 0; |
1967 | ||
1968 | err_alloc: | |
1969 | nfp_net_rx_ring_free(rx_ring); | |
1970 | return -ENOMEM; | |
1971 | } | |
1972 | ||
892a7f70 | 1973 | static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
36a857e4 | 1974 | { |
36a857e4 JK |
1975 | unsigned int r; |
1976 | ||
892a7f70 JK |
1977 | dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings), |
1978 | GFP_KERNEL); | |
1979 | if (!dp->rx_rings) | |
1980 | return -ENOMEM; | |
36a857e4 | 1981 | |
892a7f70 JK |
1982 | for (r = 0; r < dp->num_rx_rings; r++) { |
1983 | nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r); | |
36a857e4 | 1984 | |
892a7f70 | 1985 | if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
1986 | goto err_free_prev; |
1987 | ||
892a7f70 | 1988 | if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
1989 | goto err_free_ring; |
1990 | } | |
1991 | ||
892a7f70 | 1992 | return 0; |
36a857e4 JK |
1993 | |
1994 | err_free_prev: | |
1995 | while (r--) { | |
892a7f70 | 1996 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); |
36a857e4 | 1997 | err_free_ring: |
892a7f70 | 1998 | nfp_net_rx_ring_free(&dp->rx_rings[r]); |
36a857e4 | 1999 | } |
892a7f70 JK |
2000 | kfree(dp->rx_rings); |
2001 | return -ENOMEM; | |
36a857e4 JK |
2002 | } |
2003 | ||
892a7f70 | 2004 | static void nfp_net_rx_rings_free(struct nfp_net_dp *dp) |
36a857e4 JK |
2005 | { |
2006 | unsigned int r; | |
2007 | ||
892a7f70 JK |
2008 | for (r = 0; r < dp->num_rx_rings; r++) { |
2009 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); | |
2010 | nfp_net_rx_ring_free(&dp->rx_rings[r]); | |
36a857e4 JK |
2011 | } |
2012 | ||
892a7f70 | 2013 | kfree(dp->rx_rings); |
36a857e4 JK |
2014 | } |
2015 | ||
e31230f9 | 2016 | static void |
79c12a75 JK |
2017 | nfp_net_vector_assign_rings(struct nfp_net_dp *dp, |
2018 | struct nfp_net_r_vector *r_vec, int idx) | |
e31230f9 | 2019 | { |
79c12a75 | 2020 | r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL; |
ecd63a02 | 2021 | r_vec->tx_ring = |
79c12a75 | 2022 | idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL; |
ecd63a02 | 2023 | |
79c12a75 JK |
2024 | r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ? |
2025 | &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL; | |
e31230f9 JK |
2026 | } |
2027 | ||
0afbfb18 JK |
2028 | static int |
2029 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
2030 | int idx) | |
4c352362 | 2031 | { |
0afbfb18 | 2032 | int err; |
4c352362 | 2033 | |
164d1e9e | 2034 | /* Setup NAPI */ |
79c12a75 | 2035 | netif_napi_add(nn->dp.netdev, &r_vec->napi, |
164d1e9e JK |
2036 | nfp_net_poll, NAPI_POLL_WEIGHT); |
2037 | ||
0afbfb18 | 2038 | snprintf(r_vec->name, sizeof(r_vec->name), |
79c12a75 | 2039 | "%s-rxtx-%d", nn->dp.netdev->name, idx); |
fdace6c2 JK |
2040 | err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, |
2041 | r_vec); | |
0afbfb18 | 2042 | if (err) { |
164d1e9e | 2043 | netif_napi_del(&r_vec->napi); |
fdace6c2 | 2044 | nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); |
0afbfb18 JK |
2045 | return err; |
2046 | } | |
fdace6c2 | 2047 | disable_irq(r_vec->irq_vector); |
4c352362 | 2048 | |
fdace6c2 | 2049 | irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask); |
4c352362 | 2050 | |
fdace6c2 JK |
2051 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector, |
2052 | r_vec->irq_entry); | |
4c352362 | 2053 | |
0afbfb18 | 2054 | return 0; |
4c352362 JK |
2055 | } |
2056 | ||
0afbfb18 JK |
2057 | static void |
2058 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 2059 | { |
fdace6c2 | 2060 | irq_set_affinity_hint(r_vec->irq_vector, NULL); |
4c352362 | 2061 | netif_napi_del(&r_vec->napi); |
fdace6c2 | 2062 | free_irq(r_vec->irq_vector, r_vec); |
4c352362 JK |
2063 | } |
2064 | ||
2065 | /** | |
2066 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
2067 | * @nn: NFP Net device to reconfigure | |
2068 | */ | |
2069 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
2070 | { | |
2071 | int i; | |
2072 | ||
2073 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
2074 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
2075 | get_unaligned_le32(nn->rss_itbl + i)); | |
2076 | } | |
2077 | ||
2078 | /** | |
2079 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
2080 | * @nn: NFP Net device to reconfigure | |
2081 | */ | |
2082 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
2083 | { | |
2084 | int i; | |
2085 | ||
9ff304bf | 2086 | for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4) |
4c352362 JK |
2087 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, |
2088 | get_unaligned_le32(nn->rss_key + i)); | |
2089 | } | |
2090 | ||
2091 | /** | |
2092 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
2093 | * @nn: NFP Net device to reconfigure | |
2094 | */ | |
2095 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
2096 | { | |
2097 | u8 i; | |
2098 | u32 factor; | |
2099 | u32 value; | |
2100 | ||
2101 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
2102 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
2103 | * count. | |
2104 | */ | |
2105 | factor = nn->me_freq_mhz / 16; | |
2106 | ||
2107 | /* copy RX interrupt coalesce parameters */ | |
2108 | value = (nn->rx_coalesce_max_frames << 16) | | |
2109 | (factor * nn->rx_coalesce_usecs); | |
79c12a75 | 2110 | for (i = 0; i < nn->dp.num_rx_rings; i++) |
4c352362 JK |
2111 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); |
2112 | ||
2113 | /* copy TX interrupt coalesce parameters */ | |
2114 | value = (nn->tx_coalesce_max_frames << 16) | | |
2115 | (factor * nn->tx_coalesce_usecs); | |
79c12a75 | 2116 | for (i = 0; i < nn->dp.num_tx_rings; i++) |
4c352362 JK |
2117 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); |
2118 | } | |
2119 | ||
2120 | /** | |
f642963b | 2121 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 2122 | * @nn: NFP Net device to reconfigure |
9d372759 | 2123 | * @addr: MAC address to write |
4c352362 | 2124 | * |
f642963b JK |
2125 | * Writes the MAC address from the netdev to the device control BAR. Does not |
2126 | * perform the required reconfig. We do a bit of byte swapping dance because | |
2127 | * firmware is LE. | |
4c352362 | 2128 | */ |
9d372759 | 2129 | static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr) |
4c352362 | 2130 | { |
9d372759 PC |
2131 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr)); |
2132 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4)); | |
4c352362 JK |
2133 | } |
2134 | ||
ca40feab JK |
2135 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
2136 | { | |
2137 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
2138 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
2139 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
2140 | ||
2141 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
2142 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
2143 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
2144 | } | |
2145 | ||
4c352362 JK |
2146 | /** |
2147 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
2148 | * @nn: NFP Net device to reconfigure | |
2149 | */ | |
2150 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
2151 | { | |
2152 | u32 new_ctrl, update; | |
ca40feab | 2153 | unsigned int r; |
4c352362 JK |
2154 | int err; |
2155 | ||
79c12a75 | 2156 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2157 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; |
2158 | update = NFP_NET_CFG_UPDATE_GEN; | |
2159 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2160 | update |= NFP_NET_CFG_UPDATE_RING; | |
2161 | ||
2162 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2163 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
2164 | ||
2165 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2166 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2167 | ||
2168 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2169 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 2170 | if (err) |
4c352362 | 2171 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 2172 | |
79c12a75 JK |
2173 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
2174 | nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]); | |
2175 | for (r = 0; r < nn->dp.num_tx_rings; r++) | |
2176 | nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]); | |
2177 | for (r = 0; r < nn->dp.num_r_vecs; r++) | |
ca40feab JK |
2178 | nfp_net_vec_clear_ring_data(nn, r); |
2179 | ||
79c12a75 | 2180 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2181 | } |
2182 | ||
ca40feab | 2183 | static void |
cbeaf7aa JK |
2184 | nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, |
2185 | struct nfp_net_rx_ring *rx_ring, unsigned int idx) | |
ca40feab JK |
2186 | { |
2187 | /* Write the DMA address, size and MSI-X info to the device */ | |
cbeaf7aa JK |
2188 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma); |
2189 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt)); | |
fdace6c2 | 2190 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry); |
cbeaf7aa | 2191 | } |
ca40feab | 2192 | |
cbeaf7aa JK |
2193 | static void |
2194 | nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, | |
2195 | struct nfp_net_tx_ring *tx_ring, unsigned int idx) | |
2196 | { | |
2197 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma); | |
2198 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt)); | |
fdace6c2 | 2199 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry); |
ca40feab JK |
2200 | } |
2201 | ||
ac0488ef JK |
2202 | /** |
2203 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
2204 | * @nn: NFP Net device to reconfigure | |
2205 | */ | |
2206 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
1cd0cfc4 | 2207 | { |
ee200a73 | 2208 | u32 bufsz, new_ctrl, update = 0; |
1cd0cfc4 JK |
2209 | unsigned int r; |
2210 | int err; | |
2211 | ||
79c12a75 | 2212 | new_ctrl = nn->dp.ctrl; |
1cd0cfc4 | 2213 | |
611bdd49 | 2214 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) { |
1cd0cfc4 JK |
2215 | nfp_net_rss_write_key(nn); |
2216 | nfp_net_rss_write_itbl(nn); | |
2217 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
2218 | update |= NFP_NET_CFG_UPDATE_RSS; | |
2219 | } | |
2220 | ||
ad50451e | 2221 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) { |
1cd0cfc4 | 2222 | nfp_net_coalesce_write_cfg(nn); |
1cd0cfc4 JK |
2223 | update |= NFP_NET_CFG_UPDATE_IRQMOD; |
2224 | } | |
2225 | ||
79c12a75 JK |
2226 | for (r = 0; r < nn->dp.num_tx_rings; r++) |
2227 | nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r); | |
2228 | for (r = 0; r < nn->dp.num_rx_rings; r++) | |
2229 | nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r); | |
1cd0cfc4 | 2230 | |
79c12a75 JK |
2231 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ? |
2232 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1); | |
1cd0cfc4 | 2233 | |
79c12a75 JK |
2234 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ? |
2235 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1); | |
1cd0cfc4 | 2236 | |
9d372759 | 2237 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); |
1cd0cfc4 | 2238 | |
79c12a75 | 2239 | nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.netdev->mtu); |
ee200a73 JK |
2240 | |
2241 | bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA; | |
2242 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz); | |
1cd0cfc4 JK |
2243 | |
2244 | /* Enable device */ | |
2245 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
2246 | update |= NFP_NET_CFG_UPDATE_GEN; | |
2247 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2248 | update |= NFP_NET_CFG_UPDATE_RING; | |
2249 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2250 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
2251 | ||
2252 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2253 | err = nfp_net_reconfig(nn, update); | |
ac0488ef JK |
2254 | if (err) { |
2255 | nfp_net_clear_config_and_disable(nn); | |
2256 | return err; | |
2257 | } | |
1cd0cfc4 | 2258 | |
79c12a75 | 2259 | nn->dp.ctrl = new_ctrl; |
1cd0cfc4 | 2260 | |
79c12a75 | 2261 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
6fe0c3b4 | 2262 | nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]); |
aba52df8 | 2263 | |
1cd0cfc4 JK |
2264 | /* Since reconfiguration requests while NFP is down are ignored we |
2265 | * have to wipe the entire VXLAN configuration and reinitialize it. | |
2266 | */ | |
79c12a75 | 2267 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_VXLAN) { |
1cd0cfc4 JK |
2268 | memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports)); |
2269 | memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt)); | |
79c12a75 | 2270 | udp_tunnel_get_rx_info(nn->dp.netdev); |
1cd0cfc4 JK |
2271 | } |
2272 | ||
ac0488ef | 2273 | return 0; |
1cd0cfc4 JK |
2274 | } |
2275 | ||
1cd0cfc4 JK |
2276 | /** |
2277 | * nfp_net_open_stack() - Start the device from stack's perspective | |
2278 | * @nn: NFP Net device to reconfigure | |
2279 | */ | |
2280 | static void nfp_net_open_stack(struct nfp_net *nn) | |
2281 | { | |
2282 | unsigned int r; | |
2283 | ||
79c12a75 | 2284 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
aba52df8 | 2285 | napi_enable(&nn->r_vecs[r].napi); |
fdace6c2 | 2286 | enable_irq(nn->r_vecs[r].irq_vector); |
aba52df8 | 2287 | } |
1cd0cfc4 | 2288 | |
79c12a75 | 2289 | netif_tx_wake_all_queues(nn->dp.netdev); |
1cd0cfc4 | 2290 | |
ce449ba7 | 2291 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
2292 | nfp_net_read_link_status(nn); |
2293 | } | |
2294 | ||
4c352362 JK |
2295 | static int nfp_net_netdev_open(struct net_device *netdev) |
2296 | { | |
2297 | struct nfp_net *nn = netdev_priv(netdev); | |
2298 | int err, r; | |
4c352362 | 2299 | |
4c352362 JK |
2300 | /* Step 1: Allocate resources for rings and the like |
2301 | * - Request interrupts | |
2302 | * - Allocate RX and TX ring resources | |
2303 | * - Setup initial RSS table | |
2304 | */ | |
2305 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", | |
2306 | nn->exn_name, sizeof(nn->exn_name), | |
2307 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2308 | if (err) | |
2309 | return err; | |
0ba40af9 JK |
2310 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2311 | nn->lsc_name, sizeof(nn->lsc_name), | |
2312 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2313 | if (err) | |
2314 | goto err_free_exn; | |
ce449ba7 | 2315 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2316 | |
79c12a75 | 2317 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
0afbfb18 JK |
2318 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
2319 | if (err) | |
cbeaf7aa JK |
2320 | goto err_cleanup_vec_p; |
2321 | } | |
a10b563d | 2322 | |
892a7f70 JK |
2323 | err = nfp_net_rx_rings_prepare(nn, &nn->dp); |
2324 | if (err) | |
a10b563d | 2325 | goto err_cleanup_vec; |
114bdef0 | 2326 | |
892a7f70 JK |
2327 | err = nfp_net_tx_rings_prepare(nn, &nn->dp); |
2328 | if (err) | |
a10b563d | 2329 | goto err_free_rx_rings; |
4c352362 | 2330 | |
e31230f9 | 2331 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 2332 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 2333 | |
79c12a75 | 2334 | err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings); |
4c352362 JK |
2335 | if (err) |
2336 | goto err_free_rings; | |
2337 | ||
79c12a75 | 2338 | err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings); |
4c352362 JK |
2339 | if (err) |
2340 | goto err_free_rings; | |
2341 | ||
4c352362 JK |
2342 | /* Step 2: Configure the NFP |
2343 | * - Enable rings from 0 to tx_rings/rx_rings - 1. | |
2344 | * - Write MAC address (in case it changed) | |
2345 | * - Set the MTU | |
2346 | * - Set the Freelist buffer size | |
2347 | * - Enable the FW | |
2348 | */ | |
1cd0cfc4 | 2349 | err = nfp_net_set_config_and_enable(nn); |
4c352362 | 2350 | if (err) |
1cd0cfc4 | 2351 | goto err_free_rings; |
4c352362 JK |
2352 | |
2353 | /* Step 3: Enable for kernel | |
2354 | * - put some freelist descriptors on each RX ring | |
2355 | * - enable NAPI on each ring | |
2356 | * - enable all TX queues | |
2357 | * - set link state | |
2358 | */ | |
1cd0cfc4 | 2359 | nfp_net_open_stack(nn); |
4c352362 JK |
2360 | |
2361 | return 0; | |
2362 | ||
4c352362 | 2363 | err_free_rings: |
892a7f70 | 2364 | nfp_net_tx_rings_free(&nn->dp); |
a10b563d | 2365 | err_free_rx_rings: |
892a7f70 | 2366 | nfp_net_rx_rings_free(&nn->dp); |
a10b563d | 2367 | err_cleanup_vec: |
79c12a75 | 2368 | r = nn->dp.num_r_vecs; |
0afbfb18 | 2369 | err_cleanup_vec_p: |
cbeaf7aa | 2370 | while (r--) |
0afbfb18 | 2371 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
0ba40af9 | 2372 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 JK |
2373 | err_free_exn: |
2374 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2375 | return err; | |
2376 | } | |
2377 | ||
2378 | /** | |
1cd0cfc4 JK |
2379 | * nfp_net_close_stack() - Quiescent the stack (part of close) |
2380 | * @nn: NFP Net device to reconfigure | |
4c352362 | 2381 | */ |
1cd0cfc4 | 2382 | static void nfp_net_close_stack(struct nfp_net *nn) |
4c352362 | 2383 | { |
1cd0cfc4 | 2384 | unsigned int r; |
4c352362 | 2385 | |
ce449ba7 | 2386 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
79c12a75 | 2387 | netif_carrier_off(nn->dp.netdev); |
4c352362 JK |
2388 | nn->link_up = false; |
2389 | ||
79c12a75 | 2390 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
fdace6c2 | 2391 | disable_irq(nn->r_vecs[r].irq_vector); |
4c352362 | 2392 | napi_disable(&nn->r_vecs[r].napi); |
aba52df8 | 2393 | } |
4c352362 | 2394 | |
79c12a75 | 2395 | netif_tx_disable(nn->dp.netdev); |
1cd0cfc4 | 2396 | } |
4c352362 | 2397 | |
1cd0cfc4 JK |
2398 | /** |
2399 | * nfp_net_close_free_all() - Free all runtime resources | |
2400 | * @nn: NFP Net device to reconfigure | |
2401 | */ | |
2402 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2403 | { | |
2404 | unsigned int r; | |
4c352362 | 2405 | |
79c12a75 | 2406 | for (r = 0; r < nn->dp.num_rx_rings; r++) { |
9dc6b116 | 2407 | nfp_net_rx_ring_bufs_free(&nn->dp, &nn->dp.rx_rings[r]); |
79c12a75 | 2408 | nfp_net_rx_ring_free(&nn->dp.rx_rings[r]); |
cbeaf7aa | 2409 | } |
92e68195 JK |
2410 | for (r = 0; r < nn->dp.num_tx_rings; r++) { |
2411 | nfp_net_tx_ring_bufs_free(&nn->dp, &nn->dp.tx_rings[r]); | |
79c12a75 | 2412 | nfp_net_tx_ring_free(&nn->dp.tx_rings[r]); |
92e68195 | 2413 | } |
79c12a75 | 2414 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
0afbfb18 | 2415 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
4c352362 | 2416 | |
79c12a75 JK |
2417 | kfree(nn->dp.rx_rings); |
2418 | kfree(nn->dp.tx_rings); | |
73725d9d | 2419 | |
0ba40af9 | 2420 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
4c352362 | 2421 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); |
1cd0cfc4 JK |
2422 | } |
2423 | ||
2424 | /** | |
2425 | * nfp_net_netdev_close() - Called when the device is downed | |
2426 | * @netdev: netdev structure | |
2427 | */ | |
2428 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2429 | { | |
2430 | struct nfp_net *nn = netdev_priv(netdev); | |
2431 | ||
1cd0cfc4 JK |
2432 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective |
2433 | */ | |
2434 | nfp_net_close_stack(nn); | |
2435 | ||
2436 | /* Step 2: Tell NFP | |
2437 | */ | |
2438 | nfp_net_clear_config_and_disable(nn); | |
2439 | ||
2440 | /* Step 3: Free resources | |
2441 | */ | |
2442 | nfp_net_close_free_all(nn); | |
4c352362 JK |
2443 | |
2444 | nn_dbg(nn, "%s down", netdev->name); | |
2445 | return 0; | |
2446 | } | |
2447 | ||
2448 | static void nfp_net_set_rx_mode(struct net_device *netdev) | |
2449 | { | |
2450 | struct nfp_net *nn = netdev_priv(netdev); | |
2451 | u32 new_ctrl; | |
2452 | ||
79c12a75 | 2453 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2454 | |
2455 | if (netdev->flags & IFF_PROMISC) { | |
2456 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
2457 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
2458 | else | |
2459 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
2460 | } else { | |
2461 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
2462 | } | |
2463 | ||
79c12a75 | 2464 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
2465 | return; |
2466 | ||
2467 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 2468 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 | 2469 | |
79c12a75 | 2470 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2471 | } |
2472 | ||
1e9e10d0 JK |
2473 | static void nfp_net_rss_init_itbl(struct nfp_net *nn) |
2474 | { | |
2475 | int i; | |
2476 | ||
2477 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
2478 | nn->rss_itbl[i] = | |
79c12a75 | 2479 | ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings); |
1e9e10d0 JK |
2480 | } |
2481 | ||
512e94dc JK |
2482 | static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) |
2483 | { | |
2484 | struct nfp_net_dp new_dp = *dp; | |
2485 | ||
2486 | *dp = nn->dp; | |
2487 | nn->dp = new_dp; | |
76e1e1a8 JK |
2488 | |
2489 | nn->dp.netdev->mtu = new_dp.mtu; | |
892a7f70 JK |
2490 | |
2491 | if (!netif_is_rxfh_configured(nn->dp.netdev)) | |
2492 | nfp_net_rss_init_itbl(nn); | |
512e94dc JK |
2493 | } |
2494 | ||
892a7f70 | 2495 | static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp) |
4c352362 | 2496 | { |
e31230f9 | 2497 | unsigned int r; |
164d1e9e | 2498 | int err; |
e31230f9 | 2499 | |
892a7f70 | 2500 | nfp_net_dp_swap(nn, dp); |
164d1e9e | 2501 | |
e31230f9 | 2502 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 2503 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 2504 | |
79c12a75 | 2505 | err = netif_set_real_num_rx_queues(nn->dp.netdev, nn->dp.num_rx_rings); |
08348995 AB |
2506 | if (err) |
2507 | return err; | |
164d1e9e | 2508 | |
79c12a75 JK |
2509 | if (nn->dp.netdev->real_num_tx_queues != nn->dp.num_stack_tx_rings) { |
2510 | err = netif_set_real_num_tx_queues(nn->dp.netdev, | |
2511 | nn->dp.num_stack_tx_rings); | |
164d1e9e JK |
2512 | if (err) |
2513 | return err; | |
2514 | } | |
2515 | ||
ac0488ef | 2516 | return nfp_net_set_config_and_enable(nn); |
68453c7a | 2517 | } |
36a857e4 | 2518 | |
783496b0 JK |
2519 | struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) |
2520 | { | |
2521 | struct nfp_net_dp *new; | |
2522 | ||
2523 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
2524 | if (!new) | |
2525 | return NULL; | |
2526 | ||
2527 | *new = nn->dp; | |
2528 | ||
2529 | /* Clear things which need to be recomputed */ | |
2530 | new->fl_bufsz = 0; | |
2531 | new->tx_rings = NULL; | |
2532 | new->rx_rings = NULL; | |
2533 | new->num_r_vecs = 0; | |
2534 | new->num_stack_tx_rings = 0; | |
2535 | ||
2536 | return new; | |
2537 | } | |
2538 | ||
d957c0f7 JK |
2539 | static int |
2540 | nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, | |
2541 | struct netlink_ext_ack *extack) | |
ecd63a02 JK |
2542 | { |
2543 | /* XDP-enabled tests */ | |
9dc6b116 | 2544 | if (!dp->xdp_prog) |
ecd63a02 | 2545 | return 0; |
2195c263 | 2546 | if (dp->fl_bufsz > PAGE_SIZE) { |
4d463c4d | 2547 | NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled"); |
ecd63a02 JK |
2548 | return -EINVAL; |
2549 | } | |
892a7f70 | 2550 | if (dp->num_tx_rings > nn->max_tx_rings) { |
4d463c4d | 2551 | NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled"); |
ecd63a02 JK |
2552 | return -EINVAL; |
2553 | } | |
2554 | ||
2555 | return 0; | |
2556 | } | |
2557 | ||
d957c0f7 JK |
2558 | int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, |
2559 | struct netlink_ext_ack *extack) | |
cc7c0333 | 2560 | { |
512e94dc | 2561 | int r, err; |
cc7c0333 | 2562 | |
76e1e1a8 | 2563 | dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); |
2195c263 | 2564 | |
892a7f70 | 2565 | dp->num_stack_tx_rings = dp->num_tx_rings; |
9dc6b116 | 2566 | if (dp->xdp_prog) |
892a7f70 | 2567 | dp->num_stack_tx_rings -= dp->num_rx_rings; |
ecd63a02 | 2568 | |
892a7f70 | 2569 | dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings); |
ecd63a02 | 2570 | |
d957c0f7 | 2571 | err = nfp_net_check_config(nn, dp, extack); |
ecd63a02 | 2572 | if (err) |
783496b0 | 2573 | goto exit_free_dp; |
164d1e9e | 2574 | |
783496b0 | 2575 | if (!netif_running(dp->netdev)) { |
892a7f70 | 2576 | nfp_net_dp_swap(nn, dp); |
783496b0 JK |
2577 | err = 0; |
2578 | goto exit_free_dp; | |
cc7c0333 JK |
2579 | } |
2580 | ||
cc7c0333 | 2581 | /* Prepare new rings */ |
512e94dc | 2582 | for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) { |
164d1e9e JK |
2583 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
2584 | if (err) { | |
512e94dc | 2585 | dp->num_r_vecs = r; |
164d1e9e JK |
2586 | goto err_cleanup_vecs; |
2587 | } | |
2588 | } | |
892a7f70 JK |
2589 | |
2590 | err = nfp_net_rx_rings_prepare(nn, dp); | |
2591 | if (err) | |
2592 | goto err_cleanup_vecs; | |
2593 | ||
2594 | err = nfp_net_tx_rings_prepare(nn, dp); | |
2595 | if (err) | |
2596 | goto err_free_rx; | |
cc7c0333 JK |
2597 | |
2598 | /* Stop device, swap in new rings, try to start the firmware */ | |
2599 | nfp_net_close_stack(nn); | |
2600 | nfp_net_clear_config_and_disable(nn); | |
2601 | ||
892a7f70 | 2602 | err = nfp_net_dp_swap_enable(nn, dp); |
cc7c0333 | 2603 | if (err) { |
68453c7a | 2604 | int err2; |
cc7c0333 | 2605 | |
68453c7a | 2606 | nfp_net_clear_config_and_disable(nn); |
cc7c0333 | 2607 | |
68453c7a | 2608 | /* Try with old configuration and old rings */ |
892a7f70 | 2609 | err2 = nfp_net_dp_swap_enable(nn, dp); |
68453c7a | 2610 | if (err2) |
cc7c0333 | 2611 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", |
68453c7a | 2612 | err, err2); |
cc7c0333 | 2613 | } |
512e94dc | 2614 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 2615 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
cc7c0333 | 2616 | |
892a7f70 JK |
2617 | nfp_net_rx_rings_free(dp); |
2618 | nfp_net_tx_rings_free(dp); | |
cc7c0333 JK |
2619 | |
2620 | nfp_net_open_stack(nn); | |
783496b0 JK |
2621 | exit_free_dp: |
2622 | kfree(dp); | |
cc7c0333 JK |
2623 | |
2624 | return err; | |
68453c7a JK |
2625 | |
2626 | err_free_rx: | |
892a7f70 | 2627 | nfp_net_rx_rings_free(dp); |
164d1e9e | 2628 | err_cleanup_vecs: |
512e94dc | 2629 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 2630 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
783496b0 | 2631 | kfree(dp); |
68453c7a JK |
2632 | return err; |
2633 | } | |
2634 | ||
2635 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
2636 | { | |
2637 | struct nfp_net *nn = netdev_priv(netdev); | |
783496b0 JK |
2638 | struct nfp_net_dp *dp; |
2639 | ||
2640 | dp = nfp_net_clone_dp(nn); | |
2641 | if (!dp) | |
2642 | return -ENOMEM; | |
68453c7a | 2643 | |
76e1e1a8 JK |
2644 | dp->mtu = new_mtu; |
2645 | ||
d957c0f7 | 2646 | return nfp_net_ring_reconfig(nn, dp, NULL); |
cc7c0333 JK |
2647 | } |
2648 | ||
bc1f4470 | 2649 | static void nfp_net_stat64(struct net_device *netdev, |
2650 | struct rtnl_link_stats64 *stats) | |
4c352362 JK |
2651 | { |
2652 | struct nfp_net *nn = netdev_priv(netdev); | |
2653 | int r; | |
2654 | ||
79c12a75 | 2655 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
4c352362 JK |
2656 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; |
2657 | u64 data[3]; | |
2658 | unsigned int start; | |
2659 | ||
2660 | do { | |
2661 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
2662 | data[0] = r_vec->rx_pkts; | |
2663 | data[1] = r_vec->rx_bytes; | |
2664 | data[2] = r_vec->rx_drops; | |
2665 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
2666 | stats->rx_packets += data[0]; | |
2667 | stats->rx_bytes += data[1]; | |
2668 | stats->rx_dropped += data[2]; | |
2669 | ||
2670 | do { | |
2671 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
2672 | data[0] = r_vec->tx_pkts; | |
2673 | data[1] = r_vec->tx_bytes; | |
2674 | data[2] = r_vec->tx_errors; | |
2675 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
2676 | stats->tx_packets += data[0]; | |
2677 | stats->tx_bytes += data[1]; | |
2678 | stats->tx_errors += data[2]; | |
2679 | } | |
4c352362 JK |
2680 | } |
2681 | ||
7533fdc0 JK |
2682 | static bool nfp_net_ebpf_capable(struct nfp_net *nn) |
2683 | { | |
2684 | if (nn->cap & NFP_NET_CFG_CTRL_BPF && | |
2685 | nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI) | |
2686 | return true; | |
2687 | return false; | |
2688 | } | |
2689 | ||
2690 | static int | |
2691 | nfp_net_setup_tc(struct net_device *netdev, u32 handle, __be16 proto, | |
2692 | struct tc_to_netdev *tc) | |
2693 | { | |
2694 | struct nfp_net *nn = netdev_priv(netdev); | |
2695 | ||
2696 | if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS)) | |
46c50518 | 2697 | return -EOPNOTSUPP; |
7533fdc0 | 2698 | if (proto != htons(ETH_P_ALL)) |
46c50518 | 2699 | return -EOPNOTSUPP; |
7533fdc0 | 2700 | |
6d677075 | 2701 | if (tc->type == TC_SETUP_CLSBPF && nfp_net_ebpf_capable(nn)) { |
79c12a75 | 2702 | if (!nn->dp.bpf_offload_xdp) |
6d677075 JK |
2703 | return nfp_net_bpf_offload(nn, tc->cls_bpf); |
2704 | else | |
2705 | return -EBUSY; | |
2706 | } | |
7533fdc0 JK |
2707 | |
2708 | return -EINVAL; | |
2709 | } | |
2710 | ||
4c352362 JK |
2711 | static int nfp_net_set_features(struct net_device *netdev, |
2712 | netdev_features_t features) | |
2713 | { | |
2714 | netdev_features_t changed = netdev->features ^ features; | |
2715 | struct nfp_net *nn = netdev_priv(netdev); | |
2716 | u32 new_ctrl; | |
2717 | int err; | |
2718 | ||
2719 | /* Assume this is not called with features we have not advertised */ | |
2720 | ||
79c12a75 | 2721 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2722 | |
2723 | if (changed & NETIF_F_RXCSUM) { | |
2724 | if (features & NETIF_F_RXCSUM) | |
ddb98d94 | 2725 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 | 2726 | else |
ddb98d94 | 2727 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
2728 | } |
2729 | ||
2730 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
2731 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
2732 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
2733 | else | |
2734 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
2735 | } | |
2736 | ||
2737 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
2738 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
28063be6 EP |
2739 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
2740 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 2741 | else |
28063be6 | 2742 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 JK |
2743 | } |
2744 | ||
2745 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
2746 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
2747 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
2748 | else | |
2749 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
2750 | } | |
2751 | ||
2752 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
2753 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
2754 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
2755 | else | |
2756 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
2757 | } | |
2758 | ||
2759 | if (changed & NETIF_F_SG) { | |
2760 | if (features & NETIF_F_SG) | |
2761 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
2762 | else | |
2763 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
2764 | } | |
2765 | ||
79c12a75 | 2766 | if (changed & NETIF_F_HW_TC && nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF) { |
7533fdc0 JK |
2767 | nn_err(nn, "Cannot disable HW TC offload while in use\n"); |
2768 | return -EBUSY; | |
2769 | } | |
2770 | ||
4c352362 JK |
2771 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", |
2772 | netdev->features, features, changed); | |
2773 | ||
79c12a75 | 2774 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
2775 | return 0; |
2776 | ||
79c12a75 | 2777 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl); |
4c352362 JK |
2778 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); |
2779 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
2780 | if (err) | |
2781 | return err; | |
2782 | ||
79c12a75 | 2783 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2784 | |
2785 | return 0; | |
2786 | } | |
2787 | ||
2788 | static netdev_features_t | |
2789 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
2790 | netdev_features_t features) | |
2791 | { | |
2792 | u8 l4_hdr; | |
2793 | ||
2794 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
2795 | features &= vlan_features_check(skb, features); | |
2796 | ||
2797 | if (!skb->encapsulation) | |
2798 | return features; | |
2799 | ||
2800 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
2801 | if (skb_is_gso(skb)) { | |
2802 | u32 hdrlen; | |
2803 | ||
2804 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
2805 | inner_tcp_hdrlen(skb); | |
2806 | ||
2807 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ)) | |
2808 | features &= ~NETIF_F_GSO_MASK; | |
2809 | } | |
2810 | ||
2811 | /* VXLAN/GRE check */ | |
2812 | switch (vlan_get_protocol(skb)) { | |
2813 | case htons(ETH_P_IP): | |
2814 | l4_hdr = ip_hdr(skb)->protocol; | |
2815 | break; | |
2816 | case htons(ETH_P_IPV6): | |
2817 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
2818 | break; | |
2819 | default: | |
a188222b | 2820 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2821 | } |
2822 | ||
2823 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
2824 | skb->inner_protocol != htons(ETH_P_TEB) || | |
2825 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
2826 | (l4_hdr == IPPROTO_UDP && | |
2827 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
2828 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 2829 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
2830 | |
2831 | return features; | |
2832 | } | |
2833 | ||
2834 | /** | |
2835 | * nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW | |
2836 | * @nn: NFP Net device to reconfigure | |
2837 | * @idx: Index into the port table where new port should be written | |
2838 | * @port: UDP port to configure (pass zero to remove VXLAN port) | |
2839 | */ | |
2840 | static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port) | |
2841 | { | |
2842 | int i; | |
2843 | ||
2844 | nn->vxlan_ports[idx] = port; | |
2845 | ||
79c12a75 | 2846 | if (!(nn->dp.ctrl & NFP_NET_CFG_CTRL_VXLAN)) |
4c352362 JK |
2847 | return; |
2848 | ||
2849 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
2850 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) | |
2851 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port), | |
2852 | be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 | | |
2853 | be16_to_cpu(nn->vxlan_ports[i])); | |
2854 | ||
3d780b92 | 2855 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN); |
4c352362 JK |
2856 | } |
2857 | ||
2858 | /** | |
2859 | * nfp_net_find_vxlan_idx() - find table entry of the port or a free one | |
2860 | * @nn: NFP Network structure | |
2861 | * @port: UDP port to look for | |
2862 | * | |
2863 | * Return: if the port is already in the table -- it's position; | |
2864 | * if the port is not in the table -- free position to use; | |
2865 | * if the table is full -- -ENOSPC. | |
2866 | */ | |
2867 | static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port) | |
2868 | { | |
2869 | int i, free_idx = -ENOSPC; | |
2870 | ||
2871 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) { | |
2872 | if (nn->vxlan_ports[i] == port) | |
2873 | return i; | |
2874 | if (!nn->vxlan_usecnt[i]) | |
2875 | free_idx = i; | |
2876 | } | |
2877 | ||
2878 | return free_idx; | |
2879 | } | |
2880 | ||
2881 | static void nfp_net_add_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2882 | struct udp_tunnel_info *ti) |
4c352362 JK |
2883 | { |
2884 | struct nfp_net *nn = netdev_priv(netdev); | |
2885 | int idx; | |
2886 | ||
3ab68837 AD |
2887 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2888 | return; | |
2889 | ||
2890 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
4c352362 JK |
2891 | if (idx == -ENOSPC) |
2892 | return; | |
2893 | ||
2894 | if (!nn->vxlan_usecnt[idx]++) | |
3ab68837 | 2895 | nfp_net_set_vxlan_port(nn, idx, ti->port); |
4c352362 JK |
2896 | } |
2897 | ||
2898 | static void nfp_net_del_vxlan_port(struct net_device *netdev, | |
3ab68837 | 2899 | struct udp_tunnel_info *ti) |
4c352362 JK |
2900 | { |
2901 | struct nfp_net *nn = netdev_priv(netdev); | |
2902 | int idx; | |
2903 | ||
3ab68837 AD |
2904 | if (ti->type != UDP_TUNNEL_TYPE_VXLAN) |
2905 | return; | |
2906 | ||
2907 | idx = nfp_net_find_vxlan_idx(nn, ti->port); | |
f50cef6f | 2908 | if (idx == -ENOSPC || !nn->vxlan_usecnt[idx]) |
4c352362 JK |
2909 | return; |
2910 | ||
2911 | if (!--nn->vxlan_usecnt[idx]) | |
2912 | nfp_net_set_vxlan_port(nn, idx, 0); | |
2913 | } | |
2914 | ||
6d677075 JK |
2915 | static int nfp_net_xdp_offload(struct nfp_net *nn, struct bpf_prog *prog) |
2916 | { | |
2917 | struct tc_cls_bpf_offload cmd = { | |
2918 | .prog = prog, | |
2919 | }; | |
2920 | int ret; | |
2921 | ||
2922 | if (!nfp_net_ebpf_capable(nn)) | |
2923 | return -EINVAL; | |
2924 | ||
79c12a75 JK |
2925 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF) { |
2926 | if (!nn->dp.bpf_offload_xdp) | |
6d677075 JK |
2927 | return prog ? -EBUSY : 0; |
2928 | cmd.command = prog ? TC_CLSBPF_REPLACE : TC_CLSBPF_DESTROY; | |
2929 | } else { | |
2930 | if (!prog) | |
2931 | return 0; | |
2932 | cmd.command = TC_CLSBPF_ADD; | |
2933 | } | |
2934 | ||
2935 | ret = nfp_net_bpf_offload(nn, &cmd); | |
2936 | /* Stop offload if replace not possible */ | |
2937 | if (ret && cmd.command == TC_CLSBPF_REPLACE) | |
2938 | nfp_net_xdp_offload(nn, NULL); | |
79c12a75 | 2939 | nn->dp.bpf_offload_xdp = prog && !ret; |
6d677075 JK |
2940 | return ret; |
2941 | } | |
2942 | ||
d957c0f7 | 2943 | static int nfp_net_xdp_setup(struct nfp_net *nn, struct netdev_xdp *xdp) |
ecd63a02 | 2944 | { |
9dc6b116 | 2945 | struct bpf_prog *old_prog = nn->dp.xdp_prog; |
d957c0f7 | 2946 | struct bpf_prog *prog = xdp->prog; |
783496b0 | 2947 | struct nfp_net_dp *dp; |
ecd63a02 JK |
2948 | int err; |
2949 | ||
79c12a75 | 2950 | if (!prog && !nn->dp.xdp_prog) |
ecd63a02 | 2951 | return 0; |
79c12a75 JK |
2952 | if (prog && nn->dp.xdp_prog) { |
2953 | prog = xchg(&nn->dp.xdp_prog, prog); | |
ecd63a02 | 2954 | bpf_prog_put(prog); |
79c12a75 | 2955 | nfp_net_xdp_offload(nn, nn->dp.xdp_prog); |
ecd63a02 JK |
2956 | return 0; |
2957 | } | |
2958 | ||
783496b0 JK |
2959 | dp = nfp_net_clone_dp(nn); |
2960 | if (!dp) | |
2961 | return -ENOMEM; | |
2962 | ||
9dc6b116 | 2963 | dp->xdp_prog = prog; |
892a7f70 | 2964 | dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; |
c487e6b1 | 2965 | dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; |
dbf637ff | 2966 | dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0; |
ecd63a02 JK |
2967 | |
2968 | /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ | |
d957c0f7 | 2969 | err = nfp_net_ring_reconfig(nn, dp, xdp->extack); |
ecd63a02 JK |
2970 | if (err) |
2971 | return err; | |
2972 | ||
9dc6b116 JK |
2973 | if (old_prog) |
2974 | bpf_prog_put(old_prog); | |
ecd63a02 | 2975 | |
79c12a75 | 2976 | nfp_net_xdp_offload(nn, nn->dp.xdp_prog); |
6d677075 | 2977 | |
ecd63a02 JK |
2978 | return 0; |
2979 | } | |
2980 | ||
2981 | static int nfp_net_xdp(struct net_device *netdev, struct netdev_xdp *xdp) | |
2982 | { | |
2983 | struct nfp_net *nn = netdev_priv(netdev); | |
2984 | ||
2985 | switch (xdp->command) { | |
2986 | case XDP_SETUP_PROG: | |
d957c0f7 | 2987 | return nfp_net_xdp_setup(nn, xdp); |
ecd63a02 | 2988 | case XDP_QUERY_PROG: |
79c12a75 | 2989 | xdp->prog_attached = !!nn->dp.xdp_prog; |
ecd63a02 JK |
2990 | return 0; |
2991 | default: | |
2992 | return -EINVAL; | |
2993 | } | |
2994 | } | |
2995 | ||
9d372759 PC |
2996 | static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) |
2997 | { | |
2998 | struct nfp_net *nn = netdev_priv(netdev); | |
2999 | struct sockaddr *saddr = addr; | |
3000 | int err; | |
3001 | ||
3002 | err = eth_prepare_mac_addr_change(netdev, addr); | |
3003 | if (err) | |
3004 | return err; | |
3005 | ||
3006 | nfp_net_write_mac_addr(nn, saddr->sa_data); | |
3007 | ||
3008 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR); | |
3009 | if (err) | |
3010 | return err; | |
3011 | ||
3012 | eth_commit_mac_addr_change(netdev, addr); | |
3013 | ||
3014 | return 0; | |
3015 | } | |
3016 | ||
eb488c26 | 3017 | const struct net_device_ops nfp_net_netdev_ops = { |
4c352362 JK |
3018 | .ndo_open = nfp_net_netdev_open, |
3019 | .ndo_stop = nfp_net_netdev_close, | |
3020 | .ndo_start_xmit = nfp_net_tx, | |
3021 | .ndo_get_stats64 = nfp_net_stat64, | |
7533fdc0 | 3022 | .ndo_setup_tc = nfp_net_setup_tc, |
4c352362 JK |
3023 | .ndo_tx_timeout = nfp_net_tx_timeout, |
3024 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
3025 | .ndo_change_mtu = nfp_net_change_mtu, | |
9d372759 | 3026 | .ndo_set_mac_address = nfp_net_set_mac_address, |
4c352362 JK |
3027 | .ndo_set_features = nfp_net_set_features, |
3028 | .ndo_features_check = nfp_net_features_check, | |
eb488c26 | 3029 | .ndo_get_phys_port_name = nfp_port_get_phys_port_name, |
3ab68837 AD |
3030 | .ndo_udp_tunnel_add = nfp_net_add_vxlan_port, |
3031 | .ndo_udp_tunnel_del = nfp_net_del_vxlan_port, | |
ecd63a02 | 3032 | .ndo_xdp = nfp_net_xdp, |
4c352362 JK |
3033 | }; |
3034 | ||
3035 | /** | |
3036 | * nfp_net_info() - Print general info about the NIC | |
3037 | * @nn: NFP Net device to reconfigure | |
3038 | */ | |
3039 | void nfp_net_info(struct nfp_net *nn) | |
3040 | { | |
416db5c1 | 3041 | nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", |
79c12a75 JK |
3042 | nn->dp.is_vf ? "VF " : "", |
3043 | nn->dp.num_tx_rings, nn->max_tx_rings, | |
3044 | nn->dp.num_rx_rings, nn->max_rx_rings); | |
4c352362 JK |
3045 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", |
3046 | nn->fw_ver.resv, nn->fw_ver.class, | |
3047 | nn->fw_ver.major, nn->fw_ver.minor, | |
3048 | nn->max_mtu); | |
9d372759 | 3049 | 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\n", |
4c352362 JK |
3050 | nn->cap, |
3051 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
3052 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
3053 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
3054 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
3055 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
3056 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
3057 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
3058 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
3059 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
28063be6 EP |
3060 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "", |
3061 | nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "", | |
611bdd49 EP |
3062 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "", |
3063 | nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "", | |
4c352362 JK |
3064 | nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "", |
3065 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", | |
3066 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
3067 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
7533fdc0 | 3068 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", |
ddb98d94 JK |
3069 | nfp_net_ebpf_capable(nn) ? "BPF " : "", |
3070 | nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? | |
9d372759 PC |
3071 | "RXCSUM_COMPLETE " : "", |
3072 | nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : ""); | |
4c352362 JK |
3073 | } |
3074 | ||
3075 | /** | |
beba69ca | 3076 | * nfp_net_alloc() - Allocate netdev and related structure |
4c352362 JK |
3077 | * @pdev: PCI device |
3078 | * @max_tx_rings: Maximum number of TX rings supported by device | |
3079 | * @max_rx_rings: Maximum number of RX rings supported by device | |
3080 | * | |
3081 | * This function allocates a netdev device and fills in the initial | |
3082 | * part of the @struct nfp_net structure. | |
3083 | * | |
3084 | * Return: NFP Net device structure, or ERR_PTR on error. | |
3085 | */ | |
beba69ca JK |
3086 | struct nfp_net *nfp_net_alloc(struct pci_dev *pdev, |
3087 | unsigned int max_tx_rings, | |
3088 | unsigned int max_rx_rings) | |
4c352362 JK |
3089 | { |
3090 | struct net_device *netdev; | |
3091 | struct nfp_net *nn; | |
4c352362 JK |
3092 | |
3093 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), | |
3094 | max_tx_rings, max_rx_rings); | |
3095 | if (!netdev) | |
3096 | return ERR_PTR(-ENOMEM); | |
3097 | ||
3098 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
3099 | nn = netdev_priv(netdev); | |
3100 | ||
79c12a75 JK |
3101 | nn->dp.netdev = netdev; |
3102 | nn->dp.dev = &pdev->dev; | |
4c352362 JK |
3103 | nn->pdev = pdev; |
3104 | ||
3105 | nn->max_tx_rings = max_tx_rings; | |
3106 | nn->max_rx_rings = max_rx_rings; | |
3107 | ||
79c12a75 JK |
3108 | nn->dp.num_tx_rings = min_t(unsigned int, |
3109 | max_tx_rings, num_online_cpus()); | |
3110 | nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings, | |
cbeaf7aa | 3111 | netif_get_num_default_rss_queues()); |
4c352362 | 3112 | |
79c12a75 JK |
3113 | nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); |
3114 | nn->dp.num_r_vecs = min_t(unsigned int, | |
3115 | nn->dp.num_r_vecs, num_online_cpus()); | |
4b27a1eb | 3116 | |
79c12a75 JK |
3117 | nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; |
3118 | nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
4c352362 JK |
3119 | |
3120 | spin_lock_init(&nn->reconfig_lock); | |
66860beb | 3121 | spin_lock_init(&nn->rx_filter_lock); |
4c352362 JK |
3122 | spin_lock_init(&nn->link_status_lock); |
3123 | ||
3d780b92 JK |
3124 | setup_timer(&nn->reconfig_timer, |
3125 | nfp_net_reconfig_timer, (unsigned long)nn); | |
66860beb JK |
3126 | setup_timer(&nn->rx_filter_stats_timer, |
3127 | nfp_net_filter_stats_timer, (unsigned long)nn); | |
3d780b92 | 3128 | |
4c352362 JK |
3129 | return nn; |
3130 | } | |
3131 | ||
3132 | /** | |
beba69ca | 3133 | * nfp_net_free() - Undo what @nfp_net_alloc() did |
4c352362 JK |
3134 | * @nn: NFP Net device to reconfigure |
3135 | */ | |
beba69ca | 3136 | void nfp_net_free(struct nfp_net *nn) |
4c352362 | 3137 | { |
79c12a75 | 3138 | free_netdev(nn->dp.netdev); |
4c352362 JK |
3139 | } |
3140 | ||
9ff304bf JK |
3141 | /** |
3142 | * nfp_net_rss_key_sz() - Get current size of the RSS key | |
3143 | * @nn: NFP Net device instance | |
3144 | * | |
3145 | * Return: size of the RSS key for currently selected hash function. | |
3146 | */ | |
3147 | unsigned int nfp_net_rss_key_sz(struct nfp_net *nn) | |
3148 | { | |
3149 | switch (nn->rss_hfunc) { | |
3150 | case ETH_RSS_HASH_TOP: | |
3151 | return NFP_NET_CFG_RSS_KEY_SZ; | |
3152 | case ETH_RSS_HASH_XOR: | |
3153 | return 0; | |
3154 | case ETH_RSS_HASH_CRC32: | |
3155 | return 4; | |
3156 | } | |
3157 | ||
3158 | nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc); | |
3159 | return 0; | |
3160 | } | |
3161 | ||
4c352362 JK |
3162 | /** |
3163 | * nfp_net_rss_init() - Set the initial RSS parameters | |
3164 | * @nn: NFP Net device to reconfigure | |
3165 | */ | |
3166 | static void nfp_net_rss_init(struct nfp_net *nn) | |
3167 | { | |
9ff304bf JK |
3168 | unsigned long func_bit, rss_cap_hfunc; |
3169 | u32 reg; | |
3170 | ||
3171 | /* Read the RSS function capability and select first supported func */ | |
3172 | reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP); | |
3173 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg); | |
3174 | if (!rss_cap_hfunc) | |
3175 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, | |
3176 | NFP_NET_CFG_RSS_TOEPLITZ); | |
3177 | ||
3178 | func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS); | |
3179 | if (func_bit == NFP_NET_CFG_RSS_HFUNCS) { | |
79c12a75 | 3180 | dev_warn(nn->dp.dev, |
9ff304bf JK |
3181 | "Bad RSS config, defaulting to Toeplitz hash\n"); |
3182 | func_bit = ETH_RSS_HASH_TOP_BIT; | |
3183 | } | |
3184 | nn->rss_hfunc = 1 << func_bit; | |
3185 | ||
3186 | netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn)); | |
4c352362 | 3187 | |
1e9e10d0 | 3188 | nfp_net_rss_init_itbl(nn); |
4c352362 JK |
3189 | |
3190 | /* Enable IPv4/IPv6 TCP by default */ | |
3191 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
3192 | NFP_NET_CFG_RSS_IPV6_TCP | | |
9ff304bf | 3193 | FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) | |
4c352362 JK |
3194 | NFP_NET_CFG_RSS_MASK; |
3195 | } | |
3196 | ||
3197 | /** | |
3198 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
3199 | * @nn: NFP Net device to reconfigure | |
3200 | */ | |
3201 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
3202 | { | |
3203 | nn->rx_coalesce_usecs = 50; | |
3204 | nn->rx_coalesce_max_frames = 64; | |
3205 | nn->tx_coalesce_usecs = 50; | |
3206 | nn->tx_coalesce_max_frames = 64; | |
3207 | } | |
3208 | ||
3209 | /** | |
beba69ca JK |
3210 | * nfp_net_init() - Initialise/finalise the nfp_net structure |
3211 | * @nn: NFP Net device structure | |
4c352362 JK |
3212 | * |
3213 | * Return: 0 on success or negative errno on error. | |
3214 | */ | |
beba69ca | 3215 | int nfp_net_init(struct nfp_net *nn) |
4c352362 | 3216 | { |
beba69ca | 3217 | struct net_device *netdev = nn->dp.netdev; |
4c352362 JK |
3218 | int err; |
3219 | ||
c487e6b1 JK |
3220 | nn->dp.rx_dma_dir = DMA_FROM_DEVICE; |
3221 | ||
4c352362 JK |
3222 | /* Get some of the read-only fields from the BAR */ |
3223 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
3224 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
3225 | ||
611bdd49 EP |
3226 | /* Chained metadata is signalled by capabilities except in version 4 */ |
3227 | nn->dp.chained_metadata_format = nn->fw_ver.major == 4 || | |
3228 | nn->cap & NFP_NET_CFG_CTRL_CHAIN_META; | |
3229 | if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4) | |
3230 | nn->cap &= ~NFP_NET_CFG_CTRL_RSS; | |
3231 | ||
9d372759 | 3232 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); |
4c352362 | 3233 | |
bf187ea0 | 3234 | /* Determine RX packet/metadata boundary offset */ |
97717aca JK |
3235 | if (nn->fw_ver.major >= 2) { |
3236 | u32 reg; | |
3237 | ||
3238 | reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
3239 | if (reg > NFP_NET_MAX_PREPEND) { | |
3240 | nn_err(nn, "Invalid rx offset: %d\n", reg); | |
3241 | return -EINVAL; | |
3242 | } | |
3243 | nn->dp.rx_offset = reg; | |
3244 | } else { | |
79c12a75 | 3245 | nn->dp.rx_offset = NFP_NET_RX_OFFSET; |
97717aca | 3246 | } |
bf187ea0 | 3247 | |
4c352362 JK |
3248 | /* Set default MTU and Freelist buffer size */ |
3249 | if (nn->max_mtu < NFP_NET_DEFAULT_MTU) | |
3250 | netdev->mtu = nn->max_mtu; | |
3251 | else | |
3252 | netdev->mtu = NFP_NET_DEFAULT_MTU; | |
76e1e1a8 JK |
3253 | nn->dp.mtu = netdev->mtu; |
3254 | nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp); | |
4c352362 JK |
3255 | |
3256 | /* Advertise/enable offloads based on capabilities | |
3257 | * | |
3258 | * Note: netdev->features show the currently enabled features | |
3259 | * and netdev->hw_features advertises which features are | |
3260 | * supported. By default we enable most features. | |
3261 | */ | |
9d372759 PC |
3262 | if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR) |
3263 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
3264 | ||
4c352362 | 3265 | netdev->hw_features = NETIF_F_HIGHDMA; |
ddb98d94 | 3266 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) { |
4c352362 | 3267 | netdev->hw_features |= NETIF_F_RXCSUM; |
ddb98d94 | 3268 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
3269 | } |
3270 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
3271 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
79c12a75 | 3272 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM; |
4c352362 JK |
3273 | } |
3274 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
3275 | netdev->hw_features |= NETIF_F_SG; | |
79c12a75 | 3276 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER; |
4c352362 | 3277 | } |
28063be6 EP |
3278 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || |
3279 | nn->cap & NFP_NET_CFG_CTRL_LSO2) { | |
4c352362 | 3280 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; |
28063be6 EP |
3281 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
3282 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 3283 | } |
611bdd49 | 3284 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { |
4c352362 JK |
3285 | netdev->hw_features |= NETIF_F_RXHASH; |
3286 | nfp_net_rss_init(nn); | |
611bdd49 EP |
3287 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: |
3288 | NFP_NET_CFG_CTRL_RSS; | |
4c352362 JK |
3289 | } |
3290 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN && | |
3291 | nn->cap & NFP_NET_CFG_CTRL_NVGRE) { | |
3292 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
3293 | netdev->hw_features |= NETIF_F_GSO_GRE | | |
3294 | NETIF_F_GSO_UDP_TUNNEL; | |
79c12a75 | 3295 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE; |
4c352362 JK |
3296 | |
3297 | netdev->hw_enc_features = netdev->hw_features; | |
3298 | } | |
3299 | ||
3300 | netdev->vlan_features = netdev->hw_features; | |
3301 | ||
3302 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
3303 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
79c12a75 | 3304 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN; |
4c352362 JK |
3305 | } |
3306 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
28063be6 EP |
3307 | if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { |
3308 | nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); | |
3309 | } else { | |
3310 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
3311 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
3312 | } | |
4c352362 JK |
3313 | } |
3314 | ||
3315 | netdev->features = netdev->hw_features; | |
3316 | ||
7533fdc0 JK |
3317 | if (nfp_net_ebpf_capable(nn)) |
3318 | netdev->hw_features |= NETIF_F_HW_TC; | |
3319 | ||
4c352362 JK |
3320 | /* Advertise but disable TSO by default. */ |
3321 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
28063be6 | 3322 | nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 JK |
3323 | |
3324 | /* Allow L2 Broadcast and Multicast through by default, if supported */ | |
3325 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
79c12a75 | 3326 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC; |
4c352362 | 3327 | if (nn->cap & NFP_NET_CFG_CTRL_L2MC) |
79c12a75 | 3328 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2MC; |
4c352362 JK |
3329 | |
3330 | /* Allow IRQ moderation, if supported */ | |
3331 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
3332 | nfp_net_irqmod_init(nn); | |
79c12a75 | 3333 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; |
4c352362 JK |
3334 | } |
3335 | ||
4c352362 JK |
3336 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
3337 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
3338 | ||
3339 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
3340 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
3341 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
3342 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
3343 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
3344 | NFP_NET_CFG_UPDATE_GEN); | |
3345 | if (err) | |
3346 | return err; | |
3347 | ||
3348 | /* Finalise the netdev setup */ | |
4c352362 JK |
3349 | netdev->netdev_ops = &nfp_net_netdev_ops; |
3350 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
44770e11 JW |
3351 | |
3352 | /* MTU range: 68 - hw-specific max */ | |
3353 | netdev->min_mtu = ETH_MIN_MTU; | |
3354 | netdev->max_mtu = nn->max_mtu; | |
3355 | ||
4b402d71 | 3356 | netif_carrier_off(netdev); |
4c352362 JK |
3357 | |
3358 | nfp_net_set_ethtool_ops(netdev); | |
beba69ca | 3359 | nfp_net_vecs_init(nn); |
4c352362 JK |
3360 | |
3361 | return register_netdev(netdev); | |
3362 | } | |
3363 | ||
3364 | /** | |
beba69ca JK |
3365 | * nfp_net_clean() - Undo what nfp_net_init() did. |
3366 | * @nn: NFP Net device structure | |
4c352362 | 3367 | */ |
beba69ca | 3368 | void nfp_net_clean(struct nfp_net *nn) |
4c352362 | 3369 | { |
6f14f443 | 3370 | unregister_netdev(nn->dp.netdev); |
c383bdd1 | 3371 | |
79c12a75 JK |
3372 | if (nn->dp.xdp_prog) |
3373 | bpf_prog_put(nn->dp.xdp_prog); | |
3374 | if (nn->dp.bpf_offload_xdp) | |
6d677075 | 3375 | nfp_net_xdp_offload(nn, NULL); |
4c352362 | 3376 | } |