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96de2506 JK |
1 | // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
2 | /* Copyright (C) 2015-2018 Netronome Systems, Inc. */ | |
4c352362 JK |
3 | |
4 | /* | |
5 | * nfp_net_common.c | |
6 | * Netronome network device driver: Common functions between PF and VF | |
7 | * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> | |
8 | * Jason McMullan <jason.mcmullan@netronome.com> | |
9 | * Rolf Neugebauer <rolf.neugebauer@netronome.com> | |
10 | * Brad Petrus <brad.petrus@netronome.com> | |
11 | * Chris Telfer <chris.telfer@netronome.com> | |
12 | */ | |
13 | ||
9ff304bf | 14 | #include <linux/bitfield.h> |
ecd63a02 | 15 | #include <linux/bpf.h> |
a67edbf4 | 16 | #include <linux/bpf_trace.h> |
4c352362 JK |
17 | #include <linux/module.h> |
18 | #include <linux/kernel.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/ip.h> | |
25 | #include <linux/ipv6.h> | |
46627170 | 26 | #include <linux/mm.h> |
5ea14712 | 27 | #include <linux/overflow.h> |
c0f031bc | 28 | #include <linux/page_ref.h> |
4c352362 JK |
29 | #include <linux/pci.h> |
30 | #include <linux/pci_regs.h> | |
31 | #include <linux/msi.h> | |
32 | #include <linux/ethtool.h> | |
33 | #include <linux/log2.h> | |
34 | #include <linux/if_vlan.h> | |
35 | #include <linux/random.h> | |
a7b1ad08 | 36 | #include <linux/vmalloc.h> |
4c352362 JK |
37 | #include <linux/ktime.h> |
38 | ||
c3991d39 | 39 | #include <net/tls.h> |
4c352362 JK |
40 | #include <net/vxlan.h> |
41 | ||
ce22f5a2 | 42 | #include "nfpcore/nfp_nsp.h" |
e2c7114a | 43 | #include "ccm.h" |
bb45e51c | 44 | #include "nfp_app.h" |
4c352362 JK |
45 | #include "nfp_net_ctrl.h" |
46 | #include "nfp_net.h" | |
25528d90 | 47 | #include "nfp_net_sriov.h" |
eb488c26 | 48 | #include "nfp_port.h" |
232eeb1f | 49 | #include "crypto/crypto.h" |
6a35ddc5 | 50 | #include "crypto/fw.h" |
4c352362 JK |
51 | |
52 | /** | |
53 | * nfp_net_get_fw_version() - Read and parse the FW version | |
54 | * @fw_ver: Output fw_version structure to read to | |
55 | * @ctrl_bar: Mapped address of the control BAR | |
56 | */ | |
57 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
58 | void __iomem *ctrl_bar) | |
59 | { | |
60 | u32 reg; | |
61 | ||
62 | reg = readl(ctrl_bar + NFP_NET_CFG_VERSION); | |
63 | put_unaligned_le32(reg, fw_ver); | |
64 | } | |
65 | ||
c487e6b1 | 66 | static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag) |
c0f031bc | 67 | { |
5cd4fbea JK |
68 | return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM, |
69 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
70 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
71 | } | |
72 | ||
73 | static void | |
74 | nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr) | |
75 | { | |
76 | dma_sync_single_for_device(dp->dev, dma_addr, | |
77 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
78 | dp->rx_dma_dir); | |
c0f031bc JK |
79 | } |
80 | ||
c487e6b1 | 81 | static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr) |
c0f031bc | 82 | { |
5cd4fbea JK |
83 | dma_unmap_single_attrs(dp->dev, dma_addr, |
84 | dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA, | |
85 | dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC); | |
86 | } | |
87 | ||
88 | static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr, | |
89 | unsigned int len) | |
90 | { | |
91 | dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM, | |
92 | len, dp->rx_dma_dir); | |
c0f031bc JK |
93 | } |
94 | ||
3d780b92 JK |
95 | /* Firmware reconfig |
96 | * | |
97 | * Firmware reconfig may take a while so we have two versions of it - | |
98 | * synchronous and asynchronous (posted). All synchronous callers are holding | |
99 | * RTNL so we don't have to worry about serializing them. | |
100 | */ | |
101 | static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update) | |
102 | { | |
103 | nn_writel(nn, NFP_NET_CFG_UPDATE, update); | |
104 | /* ensure update is written before pinging HW */ | |
105 | nn_pci_flush(nn); | |
106 | nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1); | |
6db3a9dc | 107 | nn->reconfig_in_progress_update = update; |
3d780b92 JK |
108 | } |
109 | ||
110 | /* Pass 0 as update to run posted reconfigs. */ | |
111 | static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update) | |
112 | { | |
113 | update |= nn->reconfig_posted; | |
114 | nn->reconfig_posted = 0; | |
115 | ||
116 | nfp_net_reconfig_start(nn, update); | |
117 | ||
118 | nn->reconfig_timer_active = true; | |
119 | mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ); | |
120 | } | |
121 | ||
122 | static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check) | |
123 | { | |
124 | u32 reg; | |
125 | ||
126 | reg = nn_readl(nn, NFP_NET_CFG_UPDATE); | |
127 | if (reg == 0) | |
128 | return true; | |
129 | if (reg & NFP_NET_CFG_UPDATE_ERR) { | |
6db3a9dc JK |
130 | nn_err(nn, "Reconfig error (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n", |
131 | reg, nn->reconfig_in_progress_update, | |
132 | nn_readl(nn, NFP_NET_CFG_CTRL)); | |
3d780b92 JK |
133 | return true; |
134 | } else if (last_check) { | |
6db3a9dc JK |
135 | nn_err(nn, "Reconfig timeout (status: 0x%08x update: 0x%08x ctrl: 0x%08x)\n", |
136 | reg, nn->reconfig_in_progress_update, | |
137 | nn_readl(nn, NFP_NET_CFG_CTRL)); | |
3d780b92 JK |
138 | return true; |
139 | } | |
140 | ||
141 | return false; | |
142 | } | |
143 | ||
e6471828 | 144 | static bool __nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) |
3d780b92 JK |
145 | { |
146 | bool timed_out = false; | |
e6471828 DM |
147 | int i; |
148 | ||
149 | /* Poll update field, waiting for NFP to ack the config. | |
150 | * Do an opportunistic wait-busy loop, afterward sleep. | |
151 | */ | |
152 | for (i = 0; i < 50; i++) { | |
153 | if (nfp_net_reconfig_check_done(nn, false)) | |
154 | return false; | |
155 | udelay(4); | |
156 | } | |
3d780b92 | 157 | |
3d780b92 | 158 | while (!nfp_net_reconfig_check_done(nn, timed_out)) { |
e6471828 | 159 | usleep_range(250, 500); |
3d780b92 JK |
160 | timed_out = time_is_before_eq_jiffies(deadline); |
161 | } | |
162 | ||
e6471828 DM |
163 | return timed_out; |
164 | } | |
165 | ||
166 | static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline) | |
167 | { | |
168 | if (__nfp_net_reconfig_wait(nn, deadline)) | |
169 | return -EIO; | |
170 | ||
3d780b92 JK |
171 | if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR) |
172 | return -EIO; | |
173 | ||
e6471828 | 174 | return 0; |
3d780b92 JK |
175 | } |
176 | ||
3248f77f | 177 | static void nfp_net_reconfig_timer(struct timer_list *t) |
3d780b92 | 178 | { |
3248f77f | 179 | struct nfp_net *nn = from_timer(nn, t, reconfig_timer); |
3d780b92 JK |
180 | |
181 | spin_lock_bh(&nn->reconfig_lock); | |
182 | ||
183 | nn->reconfig_timer_active = false; | |
184 | ||
185 | /* If sync caller is present it will take over from us */ | |
186 | if (nn->reconfig_sync_present) | |
187 | goto done; | |
188 | ||
189 | /* Read reconfig status and report errors */ | |
190 | nfp_net_reconfig_check_done(nn, true); | |
191 | ||
192 | if (nn->reconfig_posted) | |
193 | nfp_net_reconfig_start_async(nn, 0); | |
194 | done: | |
195 | spin_unlock_bh(&nn->reconfig_lock); | |
196 | } | |
197 | ||
198 | /** | |
199 | * nfp_net_reconfig_post() - Post async reconfig request | |
200 | * @nn: NFP Net device to reconfigure | |
201 | * @update: The value for the update field in the BAR config | |
202 | * | |
203 | * Record FW reconfiguration request. Reconfiguration will be kicked off | |
204 | * whenever reconfiguration machinery is idle. Multiple requests can be | |
205 | * merged together! | |
206 | */ | |
207 | static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update) | |
208 | { | |
209 | spin_lock_bh(&nn->reconfig_lock); | |
210 | ||
211 | /* Sync caller will kick off async reconf when it's done, just post */ | |
212 | if (nn->reconfig_sync_present) { | |
213 | nn->reconfig_posted |= update; | |
214 | goto done; | |
215 | } | |
216 | ||
217 | /* Opportunistically check if the previous command is done */ | |
218 | if (!nn->reconfig_timer_active || | |
219 | nfp_net_reconfig_check_done(nn, false)) | |
220 | nfp_net_reconfig_start_async(nn, update); | |
221 | else | |
222 | nn->reconfig_posted |= update; | |
223 | done: | |
224 | spin_unlock_bh(&nn->reconfig_lock); | |
225 | } | |
226 | ||
9ad716b9 | 227 | static void nfp_net_reconfig_sync_enter(struct nfp_net *nn) |
4c352362 | 228 | { |
3d780b92 JK |
229 | bool cancelled_timer = false; |
230 | u32 pre_posted_requests; | |
4c352362 JK |
231 | |
232 | spin_lock_bh(&nn->reconfig_lock); | |
233 | ||
e2c7114a | 234 | WARN_ON(nn->reconfig_sync_present); |
3d780b92 | 235 | nn->reconfig_sync_present = true; |
4c352362 | 236 | |
3d780b92 | 237 | if (nn->reconfig_timer_active) { |
3d780b92 JK |
238 | nn->reconfig_timer_active = false; |
239 | cancelled_timer = true; | |
240 | } | |
241 | pre_posted_requests = nn->reconfig_posted; | |
242 | nn->reconfig_posted = 0; | |
243 | ||
244 | spin_unlock_bh(&nn->reconfig_lock); | |
245 | ||
9ad716b9 JK |
246 | if (cancelled_timer) { |
247 | del_timer_sync(&nn->reconfig_timer); | |
3d780b92 | 248 | nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires); |
9ad716b9 | 249 | } |
3d780b92 JK |
250 | |
251 | /* Run the posted reconfigs which were issued before we started */ | |
252 | if (pre_posted_requests) { | |
253 | nfp_net_reconfig_start(nn, pre_posted_requests); | |
254 | nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
4c352362 | 255 | } |
9ad716b9 JK |
256 | } |
257 | ||
258 | static void nfp_net_reconfig_wait_posted(struct nfp_net *nn) | |
259 | { | |
260 | nfp_net_reconfig_sync_enter(nn); | |
261 | ||
262 | spin_lock_bh(&nn->reconfig_lock); | |
263 | nn->reconfig_sync_present = false; | |
264 | spin_unlock_bh(&nn->reconfig_lock); | |
265 | } | |
266 | ||
267 | /** | |
dd5b2498 | 268 | * __nfp_net_reconfig() - Reconfigure the firmware |
9ad716b9 JK |
269 | * @nn: NFP Net device to reconfigure |
270 | * @update: The value for the update field in the BAR config | |
271 | * | |
272 | * Write the update word to the BAR and ping the reconfig queue. The | |
273 | * poll until the firmware has acknowledged the update by zeroing the | |
274 | * update word. | |
275 | * | |
276 | * Return: Negative errno on error, 0 on success | |
277 | */ | |
232eeb1f | 278 | int __nfp_net_reconfig(struct nfp_net *nn, u32 update) |
9ad716b9 JK |
279 | { |
280 | int ret; | |
281 | ||
282 | nfp_net_reconfig_sync_enter(nn); | |
4c352362 | 283 | |
3d780b92 JK |
284 | nfp_net_reconfig_start(nn, update); |
285 | ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT); | |
286 | ||
287 | spin_lock_bh(&nn->reconfig_lock); | |
288 | ||
289 | if (nn->reconfig_posted) | |
290 | nfp_net_reconfig_start_async(nn, 0); | |
291 | ||
292 | nn->reconfig_sync_present = false; | |
293 | ||
4c352362 | 294 | spin_unlock_bh(&nn->reconfig_lock); |
3d780b92 | 295 | |
4c352362 JK |
296 | return ret; |
297 | } | |
298 | ||
dd5b2498 JK |
299 | int nfp_net_reconfig(struct nfp_net *nn, u32 update) |
300 | { | |
301 | int ret; | |
302 | ||
303 | nn_ctrl_bar_lock(nn); | |
304 | ret = __nfp_net_reconfig(nn, update); | |
305 | nn_ctrl_bar_unlock(nn); | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
310 | int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size) | |
311 | { | |
312 | if (nn->tlv_caps.mbox_len < NFP_NET_CFG_MBOX_SIMPLE_VAL + data_size) { | |
313 | nn_err(nn, "mailbox too small for %u of data (%u)\n", | |
314 | data_size, nn->tlv_caps.mbox_len); | |
315 | return -EIO; | |
316 | } | |
317 | ||
318 | nn_ctrl_bar_lock(nn); | |
319 | return 0; | |
320 | } | |
321 | ||
b64052fc | 322 | /** |
dd5b2498 | 323 | * nfp_net_mbox_reconfig() - Reconfigure the firmware via the mailbox |
b64052fc PC |
324 | * @nn: NFP Net device to reconfigure |
325 | * @mbox_cmd: The value for the mailbox command | |
326 | * | |
327 | * Helper function for mailbox updates | |
328 | * | |
329 | * Return: Negative errno on error, 0 on success | |
330 | */ | |
dd5b2498 | 331 | int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd) |
b64052fc | 332 | { |
527d7d1b | 333 | u32 mbox = nn->tlv_caps.mbox_off; |
b64052fc PC |
334 | int ret; |
335 | ||
527d7d1b | 336 | nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd); |
b64052fc | 337 | |
dd5b2498 | 338 | ret = __nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX); |
b64052fc PC |
339 | if (ret) { |
340 | nn_err(nn, "Mailbox update error\n"); | |
341 | return ret; | |
342 | } | |
343 | ||
527d7d1b | 344 | return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); |
b64052fc PC |
345 | } |
346 | ||
e2c7114a JK |
347 | void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 mbox_cmd) |
348 | { | |
349 | u32 mbox = nn->tlv_caps.mbox_off; | |
350 | ||
351 | nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd); | |
352 | ||
353 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_MBOX); | |
354 | } | |
355 | ||
356 | int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn) | |
357 | { | |
358 | u32 mbox = nn->tlv_caps.mbox_off; | |
359 | ||
360 | nfp_net_reconfig_wait_posted(nn); | |
361 | ||
362 | return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET); | |
363 | } | |
364 | ||
dd5b2498 JK |
365 | int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd) |
366 | { | |
367 | int ret; | |
368 | ||
369 | ret = nfp_net_mbox_reconfig(nn, mbox_cmd); | |
370 | nn_ctrl_bar_unlock(nn); | |
371 | return ret; | |
372 | } | |
373 | ||
4c352362 JK |
374 | /* Interrupt configuration and handling |
375 | */ | |
376 | ||
4c352362 JK |
377 | /** |
378 | * nfp_net_irq_unmask() - Unmask automasked interrupt | |
379 | * @nn: NFP Network structure | |
380 | * @entry_nr: MSI-X table entry | |
381 | * | |
416db5c1 | 382 | * Clear the ICR for the IRQ entry. |
4c352362 JK |
383 | */ |
384 | static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr) | |
385 | { | |
4c352362 JK |
386 | nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED); |
387 | nn_pci_flush(nn); | |
388 | } | |
389 | ||
390 | /** | |
fdace6c2 JK |
391 | * nfp_net_irqs_alloc() - allocates MSI-X irqs |
392 | * @pdev: PCI device structure | |
393 | * @irq_entries: Array to be initialized and used to hold the irq entries | |
394 | * @min_irqs: Minimal acceptable number of interrupts | |
395 | * @wanted_irqs: Target number of interrupts to allocate | |
4c352362 | 396 | * |
fdace6c2 | 397 | * Return: Number of irqs obtained or 0 on error. |
4c352362 | 398 | */ |
fdace6c2 JK |
399 | unsigned int |
400 | nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, | |
401 | unsigned int min_irqs, unsigned int wanted_irqs) | |
4c352362 | 402 | { |
fdace6c2 JK |
403 | unsigned int i; |
404 | int got_irqs; | |
4c352362 | 405 | |
fdace6c2 JK |
406 | for (i = 0; i < wanted_irqs; i++) |
407 | irq_entries[i].entry = i; | |
4c352362 | 408 | |
fdace6c2 JK |
409 | got_irqs = pci_enable_msix_range(pdev, irq_entries, |
410 | min_irqs, wanted_irqs); | |
411 | if (got_irqs < 0) { | |
412 | dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n", | |
413 | min_irqs, wanted_irqs, got_irqs); | |
4c352362 JK |
414 | return 0; |
415 | } | |
416 | ||
fdace6c2 JK |
417 | if (got_irqs < wanted_irqs) |
418 | dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n", | |
419 | wanted_irqs, got_irqs); | |
420 | ||
421 | return got_irqs; | |
4c352362 JK |
422 | } |
423 | ||
4c352362 | 424 | /** |
fdace6c2 JK |
425 | * nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev |
426 | * @nn: NFP Network structure | |
427 | * @irq_entries: Table of allocated interrupts | |
428 | * @n: Size of @irq_entries (number of entries to grab) | |
4c352362 | 429 | * |
fdace6c2 JK |
430 | * After interrupts are allocated with nfp_net_irqs_alloc() this function |
431 | * should be called to assign them to a specific netdev (port). | |
4c352362 | 432 | */ |
fdace6c2 JK |
433 | void |
434 | nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, | |
435 | unsigned int n) | |
4c352362 | 436 | { |
79c12a75 JK |
437 | struct nfp_net_dp *dp = &nn->dp; |
438 | ||
b33ae997 | 439 | nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS; |
79c12a75 | 440 | dp->num_r_vecs = nn->max_r_vecs; |
4c352362 | 441 | |
fdace6c2 | 442 | memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n); |
4c352362 | 443 | |
79c12a75 JK |
444 | if (dp->num_rx_rings > dp->num_r_vecs || |
445 | dp->num_tx_rings > dp->num_r_vecs) | |
87232d96 JK |
446 | dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n", |
447 | dp->num_rx_rings, dp->num_tx_rings, | |
448 | dp->num_r_vecs); | |
fdace6c2 | 449 | |
79c12a75 JK |
450 | dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings); |
451 | dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings); | |
452 | dp->num_stack_tx_rings = dp->num_tx_rings; | |
4c352362 JK |
453 | } |
454 | ||
455 | /** | |
456 | * nfp_net_irqs_disable() - Disable interrupts | |
fdace6c2 | 457 | * @pdev: PCI device structure |
4c352362 JK |
458 | * |
459 | * Undoes what @nfp_net_irqs_alloc() does. | |
460 | */ | |
fdace6c2 | 461 | void nfp_net_irqs_disable(struct pci_dev *pdev) |
4c352362 | 462 | { |
fdace6c2 | 463 | pci_disable_msix(pdev); |
4c352362 JK |
464 | } |
465 | ||
466 | /** | |
467 | * nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings. | |
468 | * @irq: Interrupt | |
469 | * @data: Opaque data structure | |
470 | * | |
471 | * Return: Indicate if the interrupt has been handled. | |
472 | */ | |
473 | static irqreturn_t nfp_net_irq_rxtx(int irq, void *data) | |
474 | { | |
475 | struct nfp_net_r_vector *r_vec = data; | |
476 | ||
477 | napi_schedule_irqoff(&r_vec->napi); | |
478 | ||
479 | /* The FW auto-masks any interrupt, either via the MASK bit in | |
480 | * the MSI-X table or via the per entry ICR field. So there | |
481 | * is no need to disable interrupts here. | |
482 | */ | |
483 | return IRQ_HANDLED; | |
484 | } | |
485 | ||
77ece8d5 JK |
486 | static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data) |
487 | { | |
488 | struct nfp_net_r_vector *r_vec = data; | |
489 | ||
490 | tasklet_schedule(&r_vec->tasklet); | |
491 | ||
492 | return IRQ_HANDLED; | |
493 | } | |
494 | ||
4c352362 JK |
495 | /** |
496 | * nfp_net_read_link_status() - Reread link status from control BAR | |
497 | * @nn: NFP Network structure | |
498 | */ | |
499 | static void nfp_net_read_link_status(struct nfp_net *nn) | |
500 | { | |
501 | unsigned long flags; | |
502 | bool link_up; | |
503 | u32 sts; | |
504 | ||
505 | spin_lock_irqsave(&nn->link_status_lock, flags); | |
506 | ||
507 | sts = nn_readl(nn, NFP_NET_CFG_STS); | |
508 | link_up = !!(sts & NFP_NET_CFG_STS_LINK); | |
509 | ||
510 | if (nn->link_up == link_up) | |
511 | goto out; | |
512 | ||
513 | nn->link_up = link_up; | |
6d4f8cba JK |
514 | if (nn->port) |
515 | set_bit(NFP_PORT_CHANGED, &nn->port->flags); | |
4c352362 JK |
516 | |
517 | if (nn->link_up) { | |
79c12a75 JK |
518 | netif_carrier_on(nn->dp.netdev); |
519 | netdev_info(nn->dp.netdev, "NIC Link is Up\n"); | |
4c352362 | 520 | } else { |
79c12a75 JK |
521 | netif_carrier_off(nn->dp.netdev); |
522 | netdev_info(nn->dp.netdev, "NIC Link is Down\n"); | |
4c352362 JK |
523 | } |
524 | out: | |
525 | spin_unlock_irqrestore(&nn->link_status_lock, flags); | |
526 | } | |
527 | ||
528 | /** | |
529 | * nfp_net_irq_lsc() - Interrupt service routine for link state changes | |
530 | * @irq: Interrupt | |
531 | * @data: Opaque data structure | |
532 | * | |
533 | * Return: Indicate if the interrupt has been handled. | |
534 | */ | |
535 | static irqreturn_t nfp_net_irq_lsc(int irq, void *data) | |
536 | { | |
537 | struct nfp_net *nn = data; | |
fdace6c2 JK |
538 | struct msix_entry *entry; |
539 | ||
540 | entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX]; | |
4c352362 JK |
541 | |
542 | nfp_net_read_link_status(nn); | |
543 | ||
fdace6c2 | 544 | nfp_net_irq_unmask(nn, entry->entry); |
4c352362 JK |
545 | |
546 | return IRQ_HANDLED; | |
547 | } | |
548 | ||
549 | /** | |
550 | * nfp_net_irq_exn() - Interrupt service routine for exceptions | |
551 | * @irq: Interrupt | |
552 | * @data: Opaque data structure | |
553 | * | |
554 | * Return: Indicate if the interrupt has been handled. | |
555 | */ | |
556 | static irqreturn_t nfp_net_irq_exn(int irq, void *data) | |
557 | { | |
558 | struct nfp_net *nn = data; | |
559 | ||
560 | nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__); | |
561 | /* XXX TO BE IMPLEMENTED */ | |
562 | return IRQ_HANDLED; | |
563 | } | |
564 | ||
565 | /** | |
566 | * nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring | |
567 | * @tx_ring: TX ring structure | |
d79737c2 JK |
568 | * @r_vec: IRQ vector servicing this ring |
569 | * @idx: Ring index | |
92e68195 | 570 | * @is_xdp: Is this an XDP TX ring? |
4c352362 | 571 | */ |
d79737c2 JK |
572 | static void |
573 | nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring, | |
92e68195 JK |
574 | struct nfp_net_r_vector *r_vec, unsigned int idx, |
575 | bool is_xdp) | |
4c352362 | 576 | { |
4c352362 JK |
577 | struct nfp_net *nn = r_vec->nfp_net; |
578 | ||
d79737c2 JK |
579 | tx_ring->idx = idx; |
580 | tx_ring->r_vec = r_vec; | |
92e68195 | 581 | tx_ring->is_xdp = is_xdp; |
7ceb781a | 582 | u64_stats_init(&tx_ring->r_vec->tx_sync); |
d79737c2 | 583 | |
4c352362 JK |
584 | tx_ring->qcidx = tx_ring->idx * nn->stride_tx; |
585 | tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx); | |
586 | } | |
587 | ||
588 | /** | |
589 | * nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring | |
590 | * @rx_ring: RX ring structure | |
d79737c2 JK |
591 | * @r_vec: IRQ vector servicing this ring |
592 | * @idx: Ring index | |
4c352362 | 593 | */ |
d79737c2 JK |
594 | static void |
595 | nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring, | |
596 | struct nfp_net_r_vector *r_vec, unsigned int idx) | |
4c352362 | 597 | { |
4c352362 JK |
598 | struct nfp_net *nn = r_vec->nfp_net; |
599 | ||
d79737c2 JK |
600 | rx_ring->idx = idx; |
601 | rx_ring->r_vec = r_vec; | |
7ceb781a | 602 | u64_stats_init(&rx_ring->r_vec->rx_sync); |
d79737c2 | 603 | |
4c352362 | 604 | rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx; |
4c352362 | 605 | rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx); |
4c352362 JK |
606 | } |
607 | ||
4c352362 JK |
608 | /** |
609 | * nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN) | |
610 | * @nn: NFP Network structure | |
611 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
612 | * @format: printf-style format to construct the interrupt name | |
613 | * @name: Pointer to allocated space for interrupt name | |
614 | * @name_sz: Size of space for interrupt name | |
615 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
616 | * @handler: IRQ handler to register for this interrupt | |
617 | */ | |
618 | static int | |
619 | nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset, | |
620 | const char *format, char *name, size_t name_sz, | |
621 | unsigned int vector_idx, irq_handler_t handler) | |
622 | { | |
623 | struct msix_entry *entry; | |
624 | int err; | |
625 | ||
626 | entry = &nn->irq_entries[vector_idx]; | |
627 | ||
77ece8d5 | 628 | snprintf(name, name_sz, format, nfp_net_name(nn)); |
4c352362 JK |
629 | err = request_irq(entry->vector, handler, 0, name, nn); |
630 | if (err) { | |
631 | nn_err(nn, "Failed to request IRQ %d (err=%d).\n", | |
632 | entry->vector, err); | |
633 | return err; | |
634 | } | |
fdace6c2 | 635 | nn_writeb(nn, ctrl_offset, entry->entry); |
fc233650 | 636 | nfp_net_irq_unmask(nn, entry->entry); |
4c352362 JK |
637 | |
638 | return 0; | |
639 | } | |
640 | ||
641 | /** | |
642 | * nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN) | |
643 | * @nn: NFP Network structure | |
644 | * @ctrl_offset: Control BAR offset where IRQ configuration should be written | |
645 | * @vector_idx: Index of MSI-X vector used for this interrupt | |
646 | */ | |
647 | static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset, | |
648 | unsigned int vector_idx) | |
649 | { | |
650 | nn_writeb(nn, ctrl_offset, 0xff); | |
fc233650 | 651 | nn_pci_flush(nn); |
4c352362 JK |
652 | free_irq(nn->irq_entries[vector_idx].vector, nn); |
653 | } | |
654 | ||
655 | /* Transmit | |
656 | * | |
657 | * One queue controller peripheral queue is used for transmit. The | |
658 | * driver en-queues packets for transmit by advancing the write | |
659 | * pointer. The device indicates that packets have transmitted by | |
660 | * advancing the read pointer. The driver maintains a local copy of | |
661 | * the read and write pointer in @struct nfp_net_tx_ring. The driver | |
662 | * keeps @wr_p in sync with the queue controller write pointer and can | |
663 | * determine how many packets have been transmitted by comparing its | |
664 | * copy of the read pointer @rd_p with the read pointer maintained by | |
665 | * the queue controller peripheral. | |
666 | */ | |
667 | ||
668 | /** | |
669 | * nfp_net_tx_full() - Check if the TX ring is full | |
670 | * @tx_ring: TX ring to check | |
671 | * @dcnt: Number of descriptors that need to be enqueued (must be >= 1) | |
672 | * | |
673 | * This function checks, based on the *host copy* of read/write | |
674 | * pointer if a given TX ring is full. The real TX queue may have | |
675 | * some newly made available slots. | |
676 | * | |
677 | * Return: True if the ring is full. | |
678 | */ | |
fa95f1d2 | 679 | static int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt) |
4c352362 JK |
680 | { |
681 | return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt); | |
682 | } | |
683 | ||
684 | /* Wrappers for deciding when to stop and restart TX queues */ | |
685 | static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring) | |
686 | { | |
687 | return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4); | |
688 | } | |
689 | ||
690 | static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring) | |
691 | { | |
692 | return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1); | |
693 | } | |
694 | ||
695 | /** | |
696 | * nfp_net_tx_ring_stop() - stop tx ring | |
697 | * @nd_q: netdev queue | |
698 | * @tx_ring: driver tx queue structure | |
699 | * | |
700 | * Safely stop TX ring. Remember that while we are running .start_xmit() | |
701 | * someone else may be cleaning the TX ring completions so we need to be | |
702 | * extra careful here. | |
703 | */ | |
704 | static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q, | |
705 | struct nfp_net_tx_ring *tx_ring) | |
706 | { | |
707 | netif_tx_stop_queue(nd_q); | |
708 | ||
709 | /* We can race with the TX completion out of NAPI so recheck */ | |
710 | smp_mb(); | |
711 | if (unlikely(nfp_net_tx_ring_should_wake(tx_ring))) | |
712 | netif_tx_start_queue(nd_q); | |
713 | } | |
714 | ||
715 | /** | |
716 | * nfp_net_tx_tso() - Set up Tx descriptor for LSO | |
4c352362 JK |
717 | * @r_vec: per-ring structure |
718 | * @txbuf: Pointer to driver soft TX descriptor | |
719 | * @txd: Pointer to HW TX descriptor | |
720 | * @skb: Pointer to SKB | |
b54ad0ea | 721 | * @md_bytes: Prepend length |
4c352362 JK |
722 | * |
723 | * Set up Tx descriptor for LSO, do nothing for non-LSO skbs. | |
724 | * Return error on packet header greater than maximum supported LSO header size. | |
725 | */ | |
79c12a75 | 726 | static void nfp_net_tx_tso(struct nfp_net_r_vector *r_vec, |
4c352362 | 727 | struct nfp_net_tx_buf *txbuf, |
b54ad0ea JK |
728 | struct nfp_net_tx_desc *txd, struct sk_buff *skb, |
729 | u32 md_bytes) | |
4c352362 | 730 | { |
b54ad0ea | 731 | u32 l3_offset, l4_offset, hdrlen; |
4c352362 JK |
732 | u16 mss; |
733 | ||
734 | if (!skb_is_gso(skb)) | |
735 | return; | |
736 | ||
28063be6 | 737 | if (!skb->encapsulation) { |
b54ad0ea JK |
738 | l3_offset = skb_network_offset(skb); |
739 | l4_offset = skb_transport_offset(skb); | |
4c352362 | 740 | hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb); |
28063be6 | 741 | } else { |
b54ad0ea JK |
742 | l3_offset = skb_inner_network_offset(skb); |
743 | l4_offset = skb_inner_transport_offset(skb); | |
4c352362 JK |
744 | hdrlen = skb_inner_transport_header(skb) - skb->data + |
745 | inner_tcp_hdrlen(skb); | |
28063be6 | 746 | } |
4c352362 JK |
747 | |
748 | txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs; | |
749 | txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1); | |
750 | ||
751 | mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK; | |
b54ad0ea JK |
752 | txd->l3_offset = l3_offset - md_bytes; |
753 | txd->l4_offset = l4_offset - md_bytes; | |
754 | txd->lso_hdrlen = hdrlen - md_bytes; | |
4c352362 JK |
755 | txd->mss = cpu_to_le16(mss); |
756 | txd->flags |= PCIE_DESC_TX_LSO; | |
757 | ||
758 | u64_stats_update_begin(&r_vec->tx_sync); | |
759 | r_vec->tx_lso++; | |
760 | u64_stats_update_end(&r_vec->tx_sync); | |
761 | } | |
762 | ||
763 | /** | |
764 | * nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor | |
79c12a75 | 765 | * @dp: NFP Net data path struct |
4c352362 JK |
766 | * @r_vec: per-ring structure |
767 | * @txbuf: Pointer to driver soft TX descriptor | |
768 | * @txd: Pointer to TX descriptor | |
769 | * @skb: Pointer to SKB | |
770 | * | |
771 | * This function sets the TX checksum flags in the TX descriptor based | |
772 | * on the configuration and the protocol of the packet to be transmitted. | |
773 | */ | |
79c12a75 JK |
774 | static void nfp_net_tx_csum(struct nfp_net_dp *dp, |
775 | struct nfp_net_r_vector *r_vec, | |
4c352362 JK |
776 | struct nfp_net_tx_buf *txbuf, |
777 | struct nfp_net_tx_desc *txd, struct sk_buff *skb) | |
778 | { | |
779 | struct ipv6hdr *ipv6h; | |
780 | struct iphdr *iph; | |
781 | u8 l4_hdr; | |
782 | ||
79c12a75 | 783 | if (!(dp->ctrl & NFP_NET_CFG_CTRL_TXCSUM)) |
4c352362 JK |
784 | return; |
785 | ||
786 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
787 | return; | |
788 | ||
789 | txd->flags |= PCIE_DESC_TX_CSUM; | |
790 | if (skb->encapsulation) | |
791 | txd->flags |= PCIE_DESC_TX_ENCAP; | |
792 | ||
793 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); | |
794 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
795 | ||
796 | if (iph->version == 4) { | |
797 | txd->flags |= PCIE_DESC_TX_IP4_CSUM; | |
798 | l4_hdr = iph->protocol; | |
799 | } else if (ipv6h->version == 6) { | |
800 | l4_hdr = ipv6h->nexthdr; | |
801 | } else { | |
79c12a75 | 802 | nn_dp_warn(dp, "partial checksum but ipv=%x!\n", iph->version); |
4c352362 JK |
803 | return; |
804 | } | |
805 | ||
806 | switch (l4_hdr) { | |
807 | case IPPROTO_TCP: | |
808 | txd->flags |= PCIE_DESC_TX_TCP_CSUM; | |
809 | break; | |
810 | case IPPROTO_UDP: | |
811 | txd->flags |= PCIE_DESC_TX_UDP_CSUM; | |
812 | break; | |
813 | default: | |
79c12a75 | 814 | nn_dp_warn(dp, "partial checksum but l4 proto=%x!\n", l4_hdr); |
4c352362 JK |
815 | return; |
816 | } | |
817 | ||
818 | u64_stats_update_begin(&r_vec->tx_sync); | |
819 | if (skb->encapsulation) | |
820 | r_vec->hw_csum_tx_inner += txbuf->pkt_cnt; | |
821 | else | |
822 | r_vec->hw_csum_tx += txbuf->pkt_cnt; | |
823 | u64_stats_update_end(&r_vec->tx_sync); | |
824 | } | |
825 | ||
c3991d39 | 826 | static struct sk_buff * |
51a5e563 JK |
827 | nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, |
828 | struct sk_buff *skb, u64 *tls_handle, int *nr_frags) | |
c3991d39 | 829 | { |
c8d3928e | 830 | #ifdef CONFIG_TLS_DEVICE |
c3991d39 DM |
831 | struct nfp_net_tls_offload_ctx *ntls; |
832 | struct sk_buff *nskb; | |
9ed431c1 | 833 | bool resync_pending; |
c3991d39 DM |
834 | u32 datalen, seq; |
835 | ||
836 | if (likely(!dp->ktls_tx)) | |
837 | return skb; | |
838 | if (!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk)) | |
839 | return skb; | |
840 | ||
841 | datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb)); | |
842 | seq = ntohl(tcp_hdr(skb)->seq); | |
843 | ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); | |
9ed431c1 JK |
844 | resync_pending = tls_offload_tx_resync_pending(skb->sk); |
845 | if (unlikely(resync_pending || ntls->next_seq != seq)) { | |
c3991d39 DM |
846 | /* Pure ACK out of order already */ |
847 | if (!datalen) | |
848 | return skb; | |
849 | ||
51a5e563 JK |
850 | u64_stats_update_begin(&r_vec->tx_sync); |
851 | r_vec->tls_tx_fallback++; | |
852 | u64_stats_update_end(&r_vec->tx_sync); | |
853 | ||
c3991d39 | 854 | nskb = tls_encrypt_skb(skb); |
51a5e563 JK |
855 | if (!nskb) { |
856 | u64_stats_update_begin(&r_vec->tx_sync); | |
857 | r_vec->tls_tx_no_fallback++; | |
858 | u64_stats_update_end(&r_vec->tx_sync); | |
c3991d39 | 859 | return NULL; |
51a5e563 | 860 | } |
c3991d39 DM |
861 | /* encryption wasn't necessary */ |
862 | if (nskb == skb) | |
863 | return skb; | |
864 | /* we don't re-check ring space */ | |
865 | if (unlikely(skb_is_nonlinear(nskb))) { | |
866 | nn_dp_warn(dp, "tls_encrypt_skb() produced fragmented frame\n"); | |
51a5e563 JK |
867 | u64_stats_update_begin(&r_vec->tx_sync); |
868 | r_vec->tx_errors++; | |
869 | u64_stats_update_end(&r_vec->tx_sync); | |
c3991d39 DM |
870 | dev_kfree_skb_any(nskb); |
871 | return NULL; | |
872 | } | |
873 | ||
874 | /* jump forward, a TX may have gotten lost, need to sync TX */ | |
9ed431c1 | 875 | if (!resync_pending && seq - ntls->next_seq < U32_MAX / 4) |
8538d29c JK |
876 | tls_offload_tx_resync_request(nskb->sk, seq, |
877 | ntls->next_seq); | |
c3991d39 DM |
878 | |
879 | *nr_frags = 0; | |
880 | return nskb; | |
881 | } | |
882 | ||
51a5e563 JK |
883 | if (datalen) { |
884 | u64_stats_update_begin(&r_vec->tx_sync); | |
427545b3 JK |
885 | if (!skb_is_gso(skb)) |
886 | r_vec->hw_tls_tx++; | |
887 | else | |
888 | r_vec->hw_tls_tx += skb_shinfo(skb)->gso_segs; | |
51a5e563 JK |
889 | u64_stats_update_end(&r_vec->tx_sync); |
890 | } | |
891 | ||
c3991d39 DM |
892 | memcpy(tls_handle, ntls->fw_handle, sizeof(ntls->fw_handle)); |
893 | ntls->next_seq += datalen; | |
c8d3928e | 894 | #endif |
c3991d39 DM |
895 | return skb; |
896 | } | |
c3991d39 | 897 | |
5a4cea28 JK |
898 | static void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle) |
899 | { | |
900 | #ifdef CONFIG_TLS_DEVICE | |
901 | struct nfp_net_tls_offload_ctx *ntls; | |
902 | u32 datalen, seq; | |
903 | ||
904 | if (!tls_handle) | |
905 | return; | |
906 | if (WARN_ON_ONCE(!skb->sk || !tls_is_sk_tx_device_offloaded(skb->sk))) | |
907 | return; | |
908 | ||
909 | datalen = skb->len - (skb_transport_offset(skb) + tcp_hdrlen(skb)); | |
910 | seq = ntohl(tcp_hdr(skb)->seq); | |
911 | ||
912 | ntls = tls_driver_ctx(skb->sk, TLS_OFFLOAD_CTX_DIR_TX); | |
913 | if (ntls->next_seq == seq + datalen) | |
914 | ntls->next_seq = seq; | |
915 | else | |
916 | WARN_ON_ONCE(1); | |
917 | #endif | |
918 | } | |
919 | ||
ecd63a02 JK |
920 | static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring) |
921 | { | |
922 | wmb(); | |
923 | nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add); | |
924 | tx_ring->wr_ptr_add = 0; | |
925 | } | |
926 | ||
5584c0f8 | 927 | static int nfp_net_prep_tx_meta(struct sk_buff *skb, u64 tls_handle) |
91bf82ca SH |
928 | { |
929 | struct metadata_dst *md_dst = skb_metadata_dst(skb); | |
930 | unsigned char *data; | |
5584c0f8 JK |
931 | u32 meta_id = 0; |
932 | int md_bytes; | |
91bf82ca | 933 | |
5584c0f8 | 934 | if (likely(!md_dst && !tls_handle)) |
91bf82ca | 935 | return 0; |
5584c0f8 JK |
936 | if (unlikely(md_dst && md_dst->type != METADATA_HW_PORT_MUX)) { |
937 | if (!tls_handle) | |
938 | return 0; | |
939 | md_dst = NULL; | |
940 | } | |
941 | ||
942 | md_bytes = 4 + !!md_dst * 4 + !!tls_handle * 8; | |
91bf82ca | 943 | |
5584c0f8 | 944 | if (unlikely(skb_cow_head(skb, md_bytes))) |
91bf82ca SH |
945 | return -ENOMEM; |
946 | ||
5584c0f8 JK |
947 | meta_id = 0; |
948 | data = skb_push(skb, md_bytes) + md_bytes; | |
949 | if (md_dst) { | |
950 | data -= 4; | |
951 | put_unaligned_be32(md_dst->u.port_info.port_id, data); | |
952 | meta_id = NFP_NET_META_PORTID; | |
953 | } | |
954 | if (tls_handle) { | |
955 | /* conn handle is opaque, we just use u64 to be able to quickly | |
956 | * compare it to zero | |
957 | */ | |
958 | data -= 8; | |
959 | memcpy(data, &tls_handle, sizeof(tls_handle)); | |
960 | meta_id <<= NFP_NET_META_FIELD_SIZE; | |
961 | meta_id |= NFP_NET_META_CONN_HANDLE; | |
962 | } | |
963 | ||
964 | data -= 4; | |
965 | put_unaligned_be32(meta_id, data); | |
91bf82ca | 966 | |
5584c0f8 | 967 | return md_bytes; |
91bf82ca SH |
968 | } |
969 | ||
4c352362 JK |
970 | /** |
971 | * nfp_net_tx() - Main transmit entry point | |
972 | * @skb: SKB to transmit | |
973 | * @netdev: netdev structure | |
974 | * | |
975 | * Return: NETDEV_TX_OK on success. | |
976 | */ | |
737ce1e9 | 977 | static netdev_tx_t nfp_net_tx(struct sk_buff *skb, struct net_device *netdev) |
4c352362 JK |
978 | { |
979 | struct nfp_net *nn = netdev_priv(netdev); | |
d7840976 | 980 | const skb_frag_t *frag; |
91bf82ca | 981 | int f, nr_frags, wr_idx, md_bytes; |
4c352362 | 982 | struct nfp_net_tx_ring *tx_ring; |
bef6b1b7 JK |
983 | struct nfp_net_r_vector *r_vec; |
984 | struct nfp_net_tx_buf *txbuf; | |
95862749 | 985 | struct nfp_net_tx_desc *txd; |
4c352362 | 986 | struct netdev_queue *nd_q; |
79c12a75 | 987 | struct nfp_net_dp *dp; |
4c352362 JK |
988 | dma_addr_t dma_addr; |
989 | unsigned int fsize; | |
5584c0f8 | 990 | u64 tls_handle = 0; |
4c352362 JK |
991 | u16 qidx; |
992 | ||
79c12a75 | 993 | dp = &nn->dp; |
4c352362 | 994 | qidx = skb_get_queue_mapping(skb); |
79c12a75 | 995 | tx_ring = &dp->tx_rings[qidx]; |
4c352362 | 996 | r_vec = tx_ring->r_vec; |
4c352362 JK |
997 | |
998 | nr_frags = skb_shinfo(skb)->nr_frags; | |
999 | ||
1000 | if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) { | |
79c12a75 JK |
1001 | nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n", |
1002 | qidx, tx_ring->wr_p, tx_ring->rd_p); | |
8b5ddf1e | 1003 | nd_q = netdev_get_tx_queue(dp->netdev, qidx); |
4c352362 | 1004 | netif_tx_stop_queue(nd_q); |
28b0cfee | 1005 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
1006 | u64_stats_update_begin(&r_vec->tx_sync); |
1007 | r_vec->tx_busy++; | |
1008 | u64_stats_update_end(&r_vec->tx_sync); | |
1009 | return NETDEV_TX_BUSY; | |
1010 | } | |
1011 | ||
51a5e563 JK |
1012 | skb = nfp_net_tls_tx(dp, r_vec, skb, &tls_handle, &nr_frags); |
1013 | if (unlikely(!skb)) { | |
1014 | nfp_net_tx_xmit_more_flush(tx_ring); | |
1015 | return NETDEV_TX_OK; | |
1016 | } | |
c3991d39 | 1017 | |
5584c0f8 | 1018 | md_bytes = nfp_net_prep_tx_meta(skb, tls_handle); |
76581af2 JK |
1019 | if (unlikely(md_bytes < 0)) |
1020 | goto err_flush; | |
91bf82ca | 1021 | |
4c352362 | 1022 | /* Start with the head skbuf */ |
79c12a75 | 1023 | dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), |
4c352362 | 1024 | DMA_TO_DEVICE); |
79c12a75 | 1025 | if (dma_mapping_error(dp->dev, dma_addr)) |
76581af2 | 1026 | goto err_dma_err; |
4c352362 | 1027 | |
4aa3b766 | 1028 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
4c352362 JK |
1029 | |
1030 | /* Stash the soft descriptor of the head then initialize it */ | |
1031 | txbuf = &tx_ring->txbufs[wr_idx]; | |
1032 | txbuf->skb = skb; | |
1033 | txbuf->dma_addr = dma_addr; | |
1034 | txbuf->fidx = -1; | |
1035 | txbuf->pkt_cnt = 1; | |
1036 | txbuf->real_len = skb->len; | |
1037 | ||
1038 | /* Build TX descriptor */ | |
1039 | txd = &tx_ring->txds[wr_idx]; | |
91bf82ca | 1040 | txd->offset_eop = (nr_frags ? 0 : PCIE_DESC_TX_EOP) | md_bytes; |
4c352362 JK |
1041 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); |
1042 | nfp_desc_set_dma_addr(txd, dma_addr); | |
1043 | txd->data_len = cpu_to_le16(skb->len); | |
1044 | ||
1045 | txd->flags = 0; | |
1046 | txd->mss = 0; | |
e53fc9fa | 1047 | txd->lso_hdrlen = 0; |
4c352362 | 1048 | |
28063be6 | 1049 | /* Do not reorder - tso may adjust pkt cnt, vlan may override fields */ |
b54ad0ea | 1050 | nfp_net_tx_tso(r_vec, txbuf, txd, skb, md_bytes); |
79c12a75 | 1051 | nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb); |
79c12a75 | 1052 | if (skb_vlan_tag_present(skb) && dp->ctrl & NFP_NET_CFG_CTRL_TXVLAN) { |
4c352362 JK |
1053 | txd->flags |= PCIE_DESC_TX_VLAN; |
1054 | txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb)); | |
1055 | } | |
1056 | ||
1057 | /* Gather DMA */ | |
1058 | if (nr_frags > 0) { | |
95862749 JK |
1059 | __le64 second_half; |
1060 | ||
4c352362 | 1061 | /* all descs must match except for in addr, length and eop */ |
95862749 | 1062 | second_half = txd->vals8[1]; |
4c352362 JK |
1063 | |
1064 | for (f = 0; f < nr_frags; f++) { | |
1065 | frag = &skb_shinfo(skb)->frags[f]; | |
1066 | fsize = skb_frag_size(frag); | |
1067 | ||
79c12a75 | 1068 | dma_addr = skb_frag_dma_map(dp->dev, frag, 0, |
4c352362 | 1069 | fsize, DMA_TO_DEVICE); |
79c12a75 | 1070 | if (dma_mapping_error(dp->dev, dma_addr)) |
4c352362 JK |
1071 | goto err_unmap; |
1072 | ||
4aa3b766 | 1073 | wr_idx = D_IDX(tx_ring, wr_idx + 1); |
4c352362 JK |
1074 | tx_ring->txbufs[wr_idx].skb = skb; |
1075 | tx_ring->txbufs[wr_idx].dma_addr = dma_addr; | |
1076 | tx_ring->txbufs[wr_idx].fidx = f; | |
1077 | ||
1078 | txd = &tx_ring->txds[wr_idx]; | |
4c352362 JK |
1079 | txd->dma_len = cpu_to_le16(fsize); |
1080 | nfp_desc_set_dma_addr(txd, dma_addr); | |
95862749 JK |
1081 | txd->offset_eop = md_bytes | |
1082 | ((f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0); | |
1083 | txd->vals8[1] = second_half; | |
4c352362 JK |
1084 | } |
1085 | ||
1086 | u64_stats_update_begin(&r_vec->tx_sync); | |
1087 | r_vec->tx_gather++; | |
1088 | u64_stats_update_end(&r_vec->tx_sync); | |
1089 | } | |
1090 | ||
46f1c52e JK |
1091 | skb_tx_timestamp(skb); |
1092 | ||
8b5ddf1e JK |
1093 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
1094 | ||
4c352362 JK |
1095 | tx_ring->wr_p += nr_frags + 1; |
1096 | if (nfp_net_tx_ring_should_stop(tx_ring)) | |
1097 | nfp_net_tx_ring_stop(nd_q, tx_ring); | |
1098 | ||
1099 | tx_ring->wr_ptr_add += nr_frags + 1; | |
6b16f9ee | 1100 | if (__netdev_tx_sent_queue(nd_q, txbuf->real_len, netdev_xmit_more())) |
ecd63a02 | 1101 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 | 1102 | |
4c352362 JK |
1103 | return NETDEV_TX_OK; |
1104 | ||
1105 | err_unmap: | |
eac2c68d | 1106 | while (--f >= 0) { |
4c352362 | 1107 | frag = &skb_shinfo(skb)->frags[f]; |
79c12a75 | 1108 | dma_unmap_page(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
1109 | skb_frag_size(frag), DMA_TO_DEVICE); |
1110 | tx_ring->txbufs[wr_idx].skb = NULL; | |
1111 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
1112 | tx_ring->txbufs[wr_idx].fidx = -2; | |
1113 | wr_idx = wr_idx - 1; | |
1114 | if (wr_idx < 0) | |
1115 | wr_idx += tx_ring->cnt; | |
1116 | } | |
79c12a75 | 1117 | dma_unmap_single(dp->dev, tx_ring->txbufs[wr_idx].dma_addr, |
4c352362 JK |
1118 | skb_headlen(skb), DMA_TO_DEVICE); |
1119 | tx_ring->txbufs[wr_idx].skb = NULL; | |
1120 | tx_ring->txbufs[wr_idx].dma_addr = 0; | |
1121 | tx_ring->txbufs[wr_idx].fidx = -2; | |
76581af2 | 1122 | err_dma_err: |
79c12a75 | 1123 | nn_dp_warn(dp, "Failed to map DMA TX buffer\n"); |
76581af2 | 1124 | err_flush: |
28b0cfee | 1125 | nfp_net_tx_xmit_more_flush(tx_ring); |
4c352362 JK |
1126 | u64_stats_update_begin(&r_vec->tx_sync); |
1127 | r_vec->tx_errors++; | |
1128 | u64_stats_update_end(&r_vec->tx_sync); | |
5a4cea28 | 1129 | nfp_net_tls_tx_undo(skb, tls_handle); |
4c352362 JK |
1130 | dev_kfree_skb_any(skb); |
1131 | return NETDEV_TX_OK; | |
1132 | } | |
1133 | ||
1134 | /** | |
1135 | * nfp_net_tx_complete() - Handled completed TX packets | |
d387b8a1 JK |
1136 | * @tx_ring: TX ring structure |
1137 | * @budget: NAPI budget (only used as bool to determine if in NAPI context) | |
4c352362 | 1138 | */ |
d387b8a1 | 1139 | static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring, int budget) |
4c352362 JK |
1140 | { |
1141 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 1142 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 JK |
1143 | struct netdev_queue *nd_q; |
1144 | u32 done_pkts = 0, done_bytes = 0; | |
4c352362 | 1145 | u32 qcp_rd_p; |
de31049a | 1146 | int todo; |
4c352362 | 1147 | |
d38df0d3 JK |
1148 | if (tx_ring->wr_p == tx_ring->rd_p) |
1149 | return; | |
1150 | ||
4c352362 JK |
1151 | /* Work out how many descriptors have been transmitted */ |
1152 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
1153 | ||
1154 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
1155 | return; | |
1156 | ||
770f0cea | 1157 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
4c352362 JK |
1158 | |
1159 | while (todo--) { | |
d7840976 | 1160 | const skb_frag_t *frag; |
de31049a JK |
1161 | struct nfp_net_tx_buf *tx_buf; |
1162 | struct sk_buff *skb; | |
1163 | int fidx, nr_frags; | |
1164 | int idx; | |
1165 | ||
4aa3b766 | 1166 | idx = D_IDX(tx_ring, tx_ring->rd_p++); |
de31049a | 1167 | tx_buf = &tx_ring->txbufs[idx]; |
4c352362 | 1168 | |
de31049a | 1169 | skb = tx_buf->skb; |
4c352362 JK |
1170 | if (!skb) |
1171 | continue; | |
1172 | ||
1173 | nr_frags = skb_shinfo(skb)->nr_frags; | |
de31049a | 1174 | fidx = tx_buf->fidx; |
4c352362 JK |
1175 | |
1176 | if (fidx == -1) { | |
1177 | /* unmap head */ | |
de31049a | 1178 | dma_unmap_single(dp->dev, tx_buf->dma_addr, |
4c352362 JK |
1179 | skb_headlen(skb), DMA_TO_DEVICE); |
1180 | ||
de31049a JK |
1181 | done_pkts += tx_buf->pkt_cnt; |
1182 | done_bytes += tx_buf->real_len; | |
4c352362 JK |
1183 | } else { |
1184 | /* unmap fragment */ | |
1185 | frag = &skb_shinfo(skb)->frags[fidx]; | |
de31049a | 1186 | dma_unmap_page(dp->dev, tx_buf->dma_addr, |
4c352362 JK |
1187 | skb_frag_size(frag), DMA_TO_DEVICE); |
1188 | } | |
1189 | ||
1190 | /* check for last gather fragment */ | |
1191 | if (fidx == nr_frags - 1) | |
d387b8a1 | 1192 | napi_consume_skb(skb, budget); |
4c352362 | 1193 | |
de31049a JK |
1194 | tx_buf->dma_addr = 0; |
1195 | tx_buf->skb = NULL; | |
1196 | tx_buf->fidx = -2; | |
4c352362 JK |
1197 | } |
1198 | ||
1199 | tx_ring->qcp_rd_p = qcp_rd_p; | |
1200 | ||
1201 | u64_stats_update_begin(&r_vec->tx_sync); | |
1202 | r_vec->tx_bytes += done_bytes; | |
1203 | r_vec->tx_pkts += done_pkts; | |
1204 | u64_stats_update_end(&r_vec->tx_sync); | |
1205 | ||
77ece8d5 JK |
1206 | if (!dp->netdev) |
1207 | return; | |
1208 | ||
79c12a75 | 1209 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
1210 | netdev_tx_completed_queue(nd_q, done_pkts, done_bytes); |
1211 | if (nfp_net_tx_ring_should_wake(tx_ring)) { | |
1212 | /* Make sure TX thread will see updated tx_ring->rd_p */ | |
1213 | smp_mb(); | |
1214 | ||
1215 | if (unlikely(netif_tx_queue_stopped(nd_q))) | |
1216 | netif_tx_wake_queue(nd_q); | |
1217 | } | |
1218 | ||
1219 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
1220 | "TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", | |
1221 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); | |
1222 | } | |
1223 | ||
abeeec4a | 1224 | static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring) |
ecd63a02 JK |
1225 | { |
1226 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
ecd63a02 | 1227 | u32 done_pkts = 0, done_bytes = 0; |
abeeec4a | 1228 | bool done_all; |
ecd63a02 JK |
1229 | int idx, todo; |
1230 | u32 qcp_rd_p; | |
1231 | ||
1232 | /* Work out how many descriptors have been transmitted */ | |
1233 | qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); | |
1234 | ||
1235 | if (qcp_rd_p == tx_ring->qcp_rd_p) | |
abeeec4a | 1236 | return true; |
ecd63a02 | 1237 | |
770f0cea | 1238 | todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p); |
ecd63a02 | 1239 | |
abeeec4a JK |
1240 | done_all = todo <= NFP_NET_XDP_MAX_COMPLETE; |
1241 | todo = min(todo, NFP_NET_XDP_MAX_COMPLETE); | |
1242 | ||
4aa3b766 | 1243 | tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo); |
abeeec4a | 1244 | |
92e68195 | 1245 | done_pkts = todo; |
ecd63a02 | 1246 | while (todo--) { |
4aa3b766 | 1247 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 JK |
1248 | tx_ring->rd_p++; |
1249 | ||
ecd63a02 | 1250 | done_bytes += tx_ring->txbufs[idx].real_len; |
ecd63a02 JK |
1251 | } |
1252 | ||
ecd63a02 JK |
1253 | u64_stats_update_begin(&r_vec->tx_sync); |
1254 | r_vec->tx_bytes += done_bytes; | |
1255 | r_vec->tx_pkts += done_pkts; | |
1256 | u64_stats_update_end(&r_vec->tx_sync); | |
1257 | ||
1258 | WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt, | |
abeeec4a | 1259 | "XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n", |
ecd63a02 | 1260 | tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt); |
abeeec4a JK |
1261 | |
1262 | return done_all; | |
ecd63a02 JK |
1263 | } |
1264 | ||
4c352362 | 1265 | /** |
827deea9 | 1266 | * nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers |
79c12a75 | 1267 | * @dp: NFP Net data path struct |
827deea9 | 1268 | * @tx_ring: TX ring structure |
4c352362 | 1269 | * |
07300f77 | 1270 | * Assumes that the device is stopped, must be idempotent. |
4c352362 | 1271 | */ |
827deea9 | 1272 | static void |
79c12a75 | 1273 | nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 | 1274 | { |
d7840976 | 1275 | const skb_frag_t *frag; |
ecd63a02 | 1276 | struct netdev_queue *nd_q; |
4c352362 | 1277 | |
92e68195 | 1278 | while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) { |
ecd63a02 | 1279 | struct nfp_net_tx_buf *tx_buf; |
92e68195 JK |
1280 | struct sk_buff *skb; |
1281 | int idx, nr_frags; | |
4c352362 | 1282 | |
4aa3b766 | 1283 | idx = D_IDX(tx_ring, tx_ring->rd_p); |
ecd63a02 | 1284 | tx_buf = &tx_ring->txbufs[idx]; |
827deea9 | 1285 | |
92e68195 JK |
1286 | skb = tx_ring->txbufs[idx].skb; |
1287 | nr_frags = skb_shinfo(skb)->nr_frags; | |
4c352362 | 1288 | |
92e68195 JK |
1289 | if (tx_buf->fidx == -1) { |
1290 | /* unmap head */ | |
1291 | dma_unmap_single(dp->dev, tx_buf->dma_addr, | |
1292 | skb_headlen(skb), DMA_TO_DEVICE); | |
1293 | } else { | |
1294 | /* unmap fragment */ | |
1295 | frag = &skb_shinfo(skb)->frags[tx_buf->fidx]; | |
1296 | dma_unmap_page(dp->dev, tx_buf->dma_addr, | |
1297 | skb_frag_size(frag), DMA_TO_DEVICE); | |
ecd63a02 | 1298 | } |
827deea9 | 1299 | |
92e68195 JK |
1300 | /* check for last gather fragment */ |
1301 | if (tx_buf->fidx == nr_frags - 1) | |
1302 | dev_kfree_skb_any(skb); | |
1303 | ||
ecd63a02 JK |
1304 | tx_buf->dma_addr = 0; |
1305 | tx_buf->skb = NULL; | |
1306 | tx_buf->fidx = -2; | |
4c352362 JK |
1307 | |
1308 | tx_ring->qcp_rd_p++; | |
1309 | tx_ring->rd_p++; | |
1310 | } | |
1311 | ||
5ea14712 | 1312 | memset(tx_ring->txds, 0, tx_ring->size); |
827deea9 JK |
1313 | tx_ring->wr_p = 0; |
1314 | tx_ring->rd_p = 0; | |
1315 | tx_ring->qcp_rd_p = 0; | |
1316 | tx_ring->wr_ptr_add = 0; | |
1317 | ||
77ece8d5 | 1318 | if (tx_ring->is_xdp || !dp->netdev) |
ecd63a02 JK |
1319 | return; |
1320 | ||
79c12a75 | 1321 | nd_q = netdev_get_tx_queue(dp->netdev, tx_ring->idx); |
4c352362 JK |
1322 | netdev_tx_reset_queue(nd_q); |
1323 | } | |
1324 | ||
0290bd29 | 1325 | static void nfp_net_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
4c352362 JK |
1326 | { |
1327 | struct nfp_net *nn = netdev_priv(netdev); | |
4c352362 | 1328 | |
d8968eda | 1329 | nn_warn(nn, "TX watchdog timeout on ring: %u\n", txqueue); |
4c352362 JK |
1330 | } |
1331 | ||
1332 | /* Receive processing | |
1333 | */ | |
bf187ea0 | 1334 | static unsigned int |
76e1e1a8 | 1335 | nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp) |
bf187ea0 JK |
1336 | { |
1337 | unsigned int fl_bufsz; | |
1338 | ||
c0f031bc | 1339 | fl_bufsz = NFP_NET_RX_BUF_HEADROOM; |
6fe0c3b4 | 1340 | fl_bufsz += dp->rx_dma_off; |
79c12a75 | 1341 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
c0f031bc | 1342 | fl_bufsz += NFP_NET_MAX_PREPEND; |
bf187ea0 | 1343 | else |
79c12a75 | 1344 | fl_bufsz += dp->rx_offset; |
76e1e1a8 | 1345 | fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu; |
bf187ea0 | 1346 | |
c0f031bc JK |
1347 | fl_bufsz = SKB_DATA_ALIGN(fl_bufsz); |
1348 | fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); | |
1349 | ||
bf187ea0 JK |
1350 | return fl_bufsz; |
1351 | } | |
4c352362 | 1352 | |
ecd63a02 JK |
1353 | static void |
1354 | nfp_net_free_frag(void *frag, bool xdp) | |
1355 | { | |
1356 | if (!xdp) | |
1357 | skb_free_frag(frag); | |
1358 | else | |
1359 | __free_page(virt_to_page(frag)); | |
1360 | } | |
1361 | ||
4c352362 | 1362 | /** |
c0f031bc | 1363 | * nfp_net_rx_alloc_one() - Allocate and map page frag for RX |
783496b0 | 1364 | * @dp: NFP Net data path struct |
4c352362 JK |
1365 | * @dma_addr: Pointer to storage for DMA address (output param) |
1366 | * | |
c0f031bc | 1367 | * This function will allcate a new page frag, map it for DMA. |
4c352362 | 1368 | * |
c0f031bc | 1369 | * Return: allocated page frag or NULL on failure. |
4c352362 | 1370 | */ |
d78005a5 | 1371 | static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
4c352362 | 1372 | { |
c0f031bc | 1373 | void *frag; |
4c352362 | 1374 | |
5f0ca2fb | 1375 | if (!dp->xdp_prog) { |
2195c263 | 1376 | frag = netdev_alloc_frag(dp->fl_bufsz); |
5f0ca2fb JK |
1377 | } else { |
1378 | struct page *page; | |
1379 | ||
453f85d4 | 1380 | page = alloc_page(GFP_KERNEL); |
5f0ca2fb JK |
1381 | frag = page ? page_address(page) : NULL; |
1382 | } | |
c0f031bc | 1383 | if (!frag) { |
79c12a75 | 1384 | nn_dp_warn(dp, "Failed to alloc receive page frag\n"); |
4c352362 JK |
1385 | return NULL; |
1386 | } | |
1387 | ||
c487e6b1 | 1388 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 | 1389 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
9dc6b116 | 1390 | nfp_net_free_frag(frag, dp->xdp_prog); |
79c12a75 | 1391 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); |
4c352362 JK |
1392 | return NULL; |
1393 | } | |
1394 | ||
c0f031bc | 1395 | return frag; |
4c352362 JK |
1396 | } |
1397 | ||
c487e6b1 | 1398 | static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr) |
b64b7bb6 JK |
1399 | { |
1400 | void *frag; | |
1401 | ||
5f0ca2fb | 1402 | if (!dp->xdp_prog) { |
79c12a75 | 1403 | frag = napi_alloc_frag(dp->fl_bufsz); |
16f50cda JK |
1404 | if (unlikely(!frag)) |
1405 | return NULL; | |
5f0ca2fb JK |
1406 | } else { |
1407 | struct page *page; | |
1408 | ||
790a3991 | 1409 | page = dev_alloc_page(); |
16f50cda JK |
1410 | if (unlikely(!page)) |
1411 | return NULL; | |
1412 | frag = page_address(page); | |
b64b7bb6 JK |
1413 | } |
1414 | ||
c487e6b1 | 1415 | *dma_addr = nfp_net_dma_map_rx(dp, frag); |
79c12a75 JK |
1416 | if (dma_mapping_error(dp->dev, *dma_addr)) { |
1417 | nfp_net_free_frag(frag, dp->xdp_prog); | |
1418 | nn_dp_warn(dp, "Failed to map DMA RX buffer\n"); | |
b64b7bb6 JK |
1419 | return NULL; |
1420 | } | |
1421 | ||
1422 | return frag; | |
1423 | } | |
1424 | ||
4c352362 JK |
1425 | /** |
1426 | * nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings | |
6fe0c3b4 | 1427 | * @dp: NFP Net data path struct |
4c352362 | 1428 | * @rx_ring: RX ring structure |
c0f031bc | 1429 | * @frag: page fragment buffer |
4c352362 JK |
1430 | * @dma_addr: DMA address of skb mapping |
1431 | */ | |
6fe0c3b4 JK |
1432 | static void nfp_net_rx_give_one(const struct nfp_net_dp *dp, |
1433 | struct nfp_net_rx_ring *rx_ring, | |
c0f031bc | 1434 | void *frag, dma_addr_t dma_addr) |
4c352362 JK |
1435 | { |
1436 | unsigned int wr_idx; | |
1437 | ||
4aa3b766 | 1438 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
4c352362 | 1439 | |
5cd4fbea JK |
1440 | nfp_net_dma_sync_dev_rx(dp, dma_addr); |
1441 | ||
4c352362 | 1442 | /* Stash SKB and DMA address away */ |
c0f031bc | 1443 | rx_ring->rxbufs[wr_idx].frag = frag; |
4c352362 JK |
1444 | rx_ring->rxbufs[wr_idx].dma_addr = dma_addr; |
1445 | ||
1446 | /* Fill freelist descriptor */ | |
1447 | rx_ring->rxds[wr_idx].fld.reserved = 0; | |
1448 | rx_ring->rxds[wr_idx].fld.meta_len_dd = 0; | |
6fe0c3b4 JK |
1449 | nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, |
1450 | dma_addr + dp->rx_dma_off); | |
4c352362 JK |
1451 | |
1452 | rx_ring->wr_p++; | |
9ed9ea70 | 1453 | if (!(rx_ring->wr_p % NFP_NET_FL_BATCH)) { |
4c352362 JK |
1454 | /* Update write pointer of the freelist queue. Make |
1455 | * sure all writes are flushed before telling the hardware. | |
1456 | */ | |
1457 | wmb(); | |
9ed9ea70 | 1458 | nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, NFP_NET_FL_BATCH); |
4c352362 JK |
1459 | } |
1460 | } | |
1461 | ||
1462 | /** | |
1934680f JK |
1463 | * nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable |
1464 | * @rx_ring: RX ring structure | |
4c352362 | 1465 | * |
07300f77 | 1466 | * Assumes that the device is stopped, must be idempotent. |
4c352362 | 1467 | */ |
1934680f | 1468 | static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1469 | { |
1934680f | 1470 | unsigned int wr_idx, last_idx; |
4c352362 | 1471 | |
07300f77 JK |
1472 | /* wr_p == rd_p means ring was never fed FL bufs. RX rings are always |
1473 | * kept at cnt - 1 FL bufs. | |
1474 | */ | |
1475 | if (rx_ring->wr_p == 0 && rx_ring->rd_p == 0) | |
1476 | return; | |
1477 | ||
1934680f | 1478 | /* Move the empty entry to the end of the list */ |
4aa3b766 | 1479 | wr_idx = D_IDX(rx_ring, rx_ring->wr_p); |
1934680f JK |
1480 | last_idx = rx_ring->cnt - 1; |
1481 | rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr; | |
c0f031bc | 1482 | rx_ring->rxbufs[wr_idx].frag = rx_ring->rxbufs[last_idx].frag; |
1934680f | 1483 | rx_ring->rxbufs[last_idx].dma_addr = 0; |
c0f031bc | 1484 | rx_ring->rxbufs[last_idx].frag = NULL; |
4c352362 | 1485 | |
5ea14712 | 1486 | memset(rx_ring->rxds, 0, rx_ring->size); |
1934680f JK |
1487 | rx_ring->wr_p = 0; |
1488 | rx_ring->rd_p = 0; | |
1934680f | 1489 | } |
4c352362 | 1490 | |
1934680f JK |
1491 | /** |
1492 | * nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring | |
79c12a75 | 1493 | * @dp: NFP Net data path struct |
1934680f JK |
1494 | * @rx_ring: RX ring to remove buffers from |
1495 | * | |
1496 | * Assumes that the device is stopped and buffers are in [0, ring->cnt - 1) | |
1497 | * entries. After device is disabled nfp_net_rx_ring_reset() must be called | |
1498 | * to restore required ring geometry. | |
1499 | */ | |
1500 | static void | |
79c12a75 | 1501 | nfp_net_rx_ring_bufs_free(struct nfp_net_dp *dp, |
9dc6b116 | 1502 | struct nfp_net_rx_ring *rx_ring) |
1934680f | 1503 | { |
1934680f | 1504 | unsigned int i; |
4c352362 | 1505 | |
1934680f JK |
1506 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
1507 | /* NULL skb can only happen when initial filling of the ring | |
1508 | * fails to allocate enough buffers and calls here to free | |
1509 | * already allocated ones. | |
1510 | */ | |
c0f031bc | 1511 | if (!rx_ring->rxbufs[i].frag) |
1934680f JK |
1512 | continue; |
1513 | ||
c487e6b1 | 1514 | nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr); |
9dc6b116 | 1515 | nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog); |
1934680f | 1516 | rx_ring->rxbufs[i].dma_addr = 0; |
c0f031bc | 1517 | rx_ring->rxbufs[i].frag = NULL; |
4c352362 JK |
1518 | } |
1519 | } | |
1520 | ||
1521 | /** | |
1934680f | 1522 | * nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW) |
79c12a75 | 1523 | * @dp: NFP Net data path struct |
1934680f | 1524 | * @rx_ring: RX ring to remove buffers from |
4c352362 | 1525 | */ |
1934680f | 1526 | static int |
79c12a75 | 1527 | nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp, |
9dc6b116 | 1528 | struct nfp_net_rx_ring *rx_ring) |
4c352362 | 1529 | { |
1934680f JK |
1530 | struct nfp_net_rx_buf *rxbufs; |
1531 | unsigned int i; | |
1532 | ||
1533 | rxbufs = rx_ring->rxbufs; | |
4c352362 | 1534 | |
1934680f | 1535 | for (i = 0; i < rx_ring->cnt - 1; i++) { |
d78005a5 | 1536 | rxbufs[i].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr); |
c0f031bc | 1537 | if (!rxbufs[i].frag) { |
9dc6b116 | 1538 | nfp_net_rx_ring_bufs_free(dp, rx_ring); |
4c352362 JK |
1539 | return -ENOMEM; |
1540 | } | |
4c352362 JK |
1541 | } |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
1934680f JK |
1546 | /** |
1547 | * nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW | |
6fe0c3b4 | 1548 | * @dp: NFP Net data path struct |
1934680f JK |
1549 | * @rx_ring: RX ring to fill |
1550 | */ | |
6fe0c3b4 JK |
1551 | static void |
1552 | nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp, | |
1553 | struct nfp_net_rx_ring *rx_ring) | |
1934680f JK |
1554 | { |
1555 | unsigned int i; | |
1556 | ||
1557 | for (i = 0; i < rx_ring->cnt - 1; i++) | |
6fe0c3b4 | 1558 | nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag, |
1934680f JK |
1559 | rx_ring->rxbufs[i].dma_addr); |
1560 | } | |
1561 | ||
4c352362 JK |
1562 | /** |
1563 | * nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors | |
1564 | * @flags: RX descriptor flags field in CPU byte order | |
1565 | */ | |
1566 | static int nfp_net_rx_csum_has_errors(u16 flags) | |
1567 | { | |
1568 | u16 csum_all_checked, csum_all_ok; | |
1569 | ||
1570 | csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL; | |
1571 | csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK; | |
1572 | ||
1573 | return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT); | |
1574 | } | |
1575 | ||
1576 | /** | |
1577 | * nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags | |
79c12a75 | 1578 | * @dp: NFP Net data path struct |
4c352362 JK |
1579 | * @r_vec: per-ring structure |
1580 | * @rxd: Pointer to RX descriptor | |
ddb98d94 | 1581 | * @meta: Parsed metadata prepend |
4c352362 JK |
1582 | * @skb: Pointer to SKB |
1583 | */ | |
79c12a75 JK |
1584 | static void nfp_net_rx_csum(struct nfp_net_dp *dp, |
1585 | struct nfp_net_r_vector *r_vec, | |
ddb98d94 JK |
1586 | struct nfp_net_rx_desc *rxd, |
1587 | struct nfp_meta_parsed *meta, struct sk_buff *skb) | |
4c352362 JK |
1588 | { |
1589 | skb_checksum_none_assert(skb); | |
1590 | ||
79c12a75 | 1591 | if (!(dp->netdev->features & NETIF_F_RXCSUM)) |
4c352362 JK |
1592 | return; |
1593 | ||
ddb98d94 JK |
1594 | if (meta->csum_type) { |
1595 | skb->ip_summed = meta->csum_type; | |
1596 | skb->csum = meta->csum; | |
1597 | u64_stats_update_begin(&r_vec->rx_sync); | |
0df57e60 | 1598 | r_vec->hw_csum_rx_complete++; |
ddb98d94 JK |
1599 | u64_stats_update_end(&r_vec->rx_sync); |
1600 | return; | |
1601 | } | |
1602 | ||
4c352362 JK |
1603 | if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) { |
1604 | u64_stats_update_begin(&r_vec->rx_sync); | |
1605 | r_vec->hw_csum_rx_error++; | |
1606 | u64_stats_update_end(&r_vec->rx_sync); | |
1607 | return; | |
1608 | } | |
1609 | ||
1610 | /* Assume that the firmware will never report inner CSUM_OK unless outer | |
1611 | * L4 headers were successfully parsed. FW will always report zero UDP | |
1612 | * checksum as CSUM_OK. | |
1613 | */ | |
1614 | if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK || | |
1615 | rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) { | |
1616 | __skb_incr_checksum_unnecessary(skb); | |
1617 | u64_stats_update_begin(&r_vec->rx_sync); | |
1618 | r_vec->hw_csum_rx_ok++; | |
1619 | u64_stats_update_end(&r_vec->rx_sync); | |
1620 | } | |
1621 | ||
1622 | if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK || | |
1623 | rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) { | |
1624 | __skb_incr_checksum_unnecessary(skb); | |
1625 | u64_stats_update_begin(&r_vec->rx_sync); | |
1626 | r_vec->hw_csum_rx_inner_ok++; | |
1627 | u64_stats_update_end(&r_vec->rx_sync); | |
1628 | } | |
1629 | } | |
1630 | ||
e524a6a9 JK |
1631 | static void |
1632 | nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta, | |
1633 | unsigned int type, __be32 *hash) | |
4c352362 | 1634 | { |
19d0f54e | 1635 | if (!(netdev->features & NETIF_F_RXHASH)) |
4c352362 JK |
1636 | return; |
1637 | ||
19d0f54e | 1638 | switch (type) { |
4c352362 JK |
1639 | case NFP_NET_RSS_IPV4: |
1640 | case NFP_NET_RSS_IPV6: | |
1641 | case NFP_NET_RSS_IPV6_EX: | |
e524a6a9 | 1642 | meta->hash_type = PKT_HASH_TYPE_L3; |
4c352362 JK |
1643 | break; |
1644 | default: | |
e524a6a9 | 1645 | meta->hash_type = PKT_HASH_TYPE_L4; |
4c352362 JK |
1646 | break; |
1647 | } | |
e524a6a9 JK |
1648 | |
1649 | meta->hash = get_unaligned_be32(hash); | |
4c352362 JK |
1650 | } |
1651 | ||
19d0f54e | 1652 | static void |
e524a6a9 | 1653 | nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta, |
b92fb77f | 1654 | void *data, struct nfp_net_rx_desc *rxd) |
19d0f54e | 1655 | { |
b92fb77f | 1656 | struct nfp_net_rx_hash *rx_hash = data; |
19d0f54e JK |
1657 | |
1658 | if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS)) | |
1659 | return; | |
1660 | ||
e524a6a9 | 1661 | nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type), |
19d0f54e JK |
1662 | &rx_hash->hash); |
1663 | } | |
1664 | ||
572c7245 | 1665 | static bool |
e524a6a9 | 1666 | nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta, |
6a35ddc5 | 1667 | void *data, void *pkt, unsigned int pkt_len, int meta_len) |
19d0f54e | 1668 | { |
19d0f54e JK |
1669 | u32 meta_info; |
1670 | ||
1671 | meta_info = get_unaligned_be32(data); | |
1672 | data += 4; | |
1673 | ||
1674 | while (meta_info) { | |
1675 | switch (meta_info & NFP_NET_META_FIELD_MASK) { | |
1676 | case NFP_NET_META_HASH: | |
1677 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
e524a6a9 | 1678 | nfp_net_set_hash(netdev, meta, |
19d0f54e JK |
1679 | meta_info & NFP_NET_META_FIELD_MASK, |
1680 | (__be32 *)data); | |
1681 | data += 4; | |
1682 | break; | |
1683 | case NFP_NET_META_MARK: | |
e524a6a9 | 1684 | meta->mark = get_unaligned_be32(data); |
19d0f54e JK |
1685 | data += 4; |
1686 | break; | |
91bf82ca SH |
1687 | case NFP_NET_META_PORTID: |
1688 | meta->portid = get_unaligned_be32(data); | |
1689 | data += 4; | |
1690 | break; | |
ddb98d94 JK |
1691 | case NFP_NET_META_CSUM: |
1692 | meta->csum_type = CHECKSUM_COMPLETE; | |
1693 | meta->csum = | |
1694 | (__force __wsum)__get_unaligned_cpu32(data); | |
1695 | data += 4; | |
1696 | break; | |
6a35ddc5 JK |
1697 | case NFP_NET_META_RESYNC_INFO: |
1698 | if (nfp_net_tls_rx_resync_req(netdev, data, pkt, | |
1699 | pkt_len)) | |
1700 | return NULL; | |
1701 | data += sizeof(struct nfp_net_tls_resync_req); | |
1702 | break; | |
19d0f54e | 1703 | default: |
572c7245 | 1704 | return true; |
19d0f54e JK |
1705 | } |
1706 | ||
1707 | meta_info >>= NFP_NET_META_FIELD_SIZE; | |
1708 | } | |
1709 | ||
572c7245 | 1710 | return data != pkt; |
19d0f54e JK |
1711 | } |
1712 | ||
e9949aeb | 1713 | static void |
6fe0c3b4 JK |
1714 | nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, |
1715 | struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, | |
1716 | struct sk_buff *skb) | |
e9949aeb JK |
1717 | { |
1718 | u64_stats_update_begin(&r_vec->rx_sync); | |
1719 | r_vec->rx_drops++; | |
16f50cda JK |
1720 | /* If we have both skb and rxbuf the replacement buffer allocation |
1721 | * must have failed, count this as an alloc failure. | |
1722 | */ | |
1723 | if (skb && rxbuf) | |
1724 | r_vec->rx_replace_buf_alloc_fail++; | |
e9949aeb JK |
1725 | u64_stats_update_end(&r_vec->rx_sync); |
1726 | ||
c0f031bc JK |
1727 | /* skb is build based on the frag, free_skb() would free the frag |
1728 | * so to be able to reuse it we need an extra ref. | |
1729 | */ | |
1730 | if (skb && rxbuf && skb->head == rxbuf->frag) | |
1731 | page_ref_inc(virt_to_head_page(rxbuf->frag)); | |
e9949aeb | 1732 | if (rxbuf) |
6fe0c3b4 | 1733 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr); |
e9949aeb JK |
1734 | if (skb) |
1735 | dev_kfree_skb_any(skb); | |
1736 | } | |
1737 | ||
a67edbf4 | 1738 | static bool |
79c12a75 | 1739 | nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, |
ecd63a02 | 1740 | struct nfp_net_tx_ring *tx_ring, |
1abae319 | 1741 | struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, |
abeeec4a | 1742 | unsigned int pkt_len, bool *completed) |
ecd63a02 | 1743 | { |
fa6540b8 | 1744 | unsigned int dma_map_sz = dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA; |
ecd63a02 JK |
1745 | struct nfp_net_tx_buf *txbuf; |
1746 | struct nfp_net_tx_desc *txd; | |
ecd63a02 JK |
1747 | int wr_idx; |
1748 | ||
fa6540b8 JDB |
1749 | /* Reject if xdp_adjust_tail grow packet beyond DMA area */ |
1750 | if (pkt_len + dma_off > dma_map_sz) | |
1751 | return false; | |
1752 | ||
ecd63a02 | 1753 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { |
abeeec4a JK |
1754 | if (!*completed) { |
1755 | nfp_net_xdp_complete(tx_ring); | |
1756 | *completed = true; | |
1757 | } | |
1758 | ||
1759 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
1760 | nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf, | |
1761 | NULL); | |
1762 | return false; | |
1763 | } | |
ecd63a02 JK |
1764 | } |
1765 | ||
4aa3b766 | 1766 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); |
ecd63a02 JK |
1767 | |
1768 | /* Stash the soft descriptor of the head then initialize it */ | |
1769 | txbuf = &tx_ring->txbufs[wr_idx]; | |
92e68195 JK |
1770 | |
1771 | nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr); | |
1772 | ||
ecd63a02 JK |
1773 | txbuf->frag = rxbuf->frag; |
1774 | txbuf->dma_addr = rxbuf->dma_addr; | |
1775 | txbuf->fidx = -1; | |
1776 | txbuf->pkt_cnt = 1; | |
1777 | txbuf->real_len = pkt_len; | |
1778 | ||
1abae319 | 1779 | dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off, |
d58cebb7 | 1780 | pkt_len, DMA_BIDIRECTIONAL); |
ecd63a02 JK |
1781 | |
1782 | /* Build TX descriptor */ | |
1783 | txd = &tx_ring->txds[wr_idx]; | |
1784 | txd->offset_eop = PCIE_DESC_TX_EOP; | |
1785 | txd->dma_len = cpu_to_le16(pkt_len); | |
1abae319 | 1786 | nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off); |
ecd63a02 JK |
1787 | txd->data_len = cpu_to_le16(pkt_len); |
1788 | ||
1789 | txd->flags = 0; | |
1790 | txd->mss = 0; | |
e53fc9fa | 1791 | txd->lso_hdrlen = 0; |
ecd63a02 JK |
1792 | |
1793 | tx_ring->wr_p++; | |
1794 | tx_ring->wr_ptr_add++; | |
a67edbf4 | 1795 | return true; |
ecd63a02 JK |
1796 | } |
1797 | ||
4c352362 JK |
1798 | /** |
1799 | * nfp_net_rx() - receive up to @budget packets on @rx_ring | |
1800 | * @rx_ring: RX ring to receive from | |
1801 | * @budget: NAPI budget | |
1802 | * | |
1803 | * Note, this function is separated out from the napi poll function to | |
1804 | * more cleanly separate packet receive code from other bookkeeping | |
1805 | * functions performed in the napi poll function. | |
1806 | * | |
4c352362 JK |
1807 | * Return: Number of packets received. |
1808 | */ | |
1809 | static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) | |
1810 | { | |
1811 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 1812 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
ecd63a02 JK |
1813 | struct nfp_net_tx_ring *tx_ring; |
1814 | struct bpf_prog *xdp_prog; | |
abeeec4a | 1815 | bool xdp_tx_cmpl = false; |
ecd63a02 | 1816 | unsigned int true_bufsz; |
c0f031bc | 1817 | struct sk_buff *skb; |
416db5c1 | 1818 | int pkts_polled = 0; |
7f1c684a | 1819 | struct xdp_buff xdp; |
4c352362 JK |
1820 | int idx; |
1821 | ||
ecd63a02 | 1822 | rcu_read_lock(); |
79c12a75 | 1823 | xdp_prog = READ_ONCE(dp->xdp_prog); |
79c12a75 | 1824 | true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; |
fa6540b8 | 1825 | xdp.frame_sz = PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM; |
7f1c684a | 1826 | xdp.rxq = &rx_ring->xdp_rxq; |
ecd63a02 JK |
1827 | tx_ring = r_vec->xdp_ring; |
1828 | ||
416db5c1 | 1829 | while (pkts_polled < budget) { |
5cd4fbea | 1830 | unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; |
13df4c66 JK |
1831 | struct nfp_net_rx_buf *rxbuf; |
1832 | struct nfp_net_rx_desc *rxd; | |
e524a6a9 | 1833 | struct nfp_meta_parsed meta; |
27f54b58 | 1834 | bool redir_egress = false; |
91bf82ca | 1835 | struct net_device *netdev; |
13df4c66 | 1836 | dma_addr_t new_dma_addr; |
65d88fd0 | 1837 | u32 meta_len_xdp = 0; |
13df4c66 JK |
1838 | void *new_frag; |
1839 | ||
4aa3b766 | 1840 | idx = D_IDX(rx_ring, rx_ring->rd_p); |
4c352362 JK |
1841 | |
1842 | rxd = &rx_ring->rxds[idx]; | |
416db5c1 | 1843 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) |
4c352362 | 1844 | break; |
416db5c1 | 1845 | |
4c352362 JK |
1846 | /* Memory barrier to ensure that we won't do other reads |
1847 | * before the DD bit. | |
1848 | */ | |
1849 | dma_rmb(); | |
1850 | ||
e524a6a9 JK |
1851 | memset(&meta, 0, sizeof(meta)); |
1852 | ||
4c352362 JK |
1853 | rx_ring->rd_p++; |
1854 | pkts_polled++; | |
4c352362 | 1855 | |
c0f031bc | 1856 | rxbuf = &rx_ring->rxbufs[idx]; |
180012dc JK |
1857 | /* < meta_len > |
1858 | * <-- [rx_offset] --> | |
1859 | * --------------------------------------------------------- | |
1860 | * | [XX] | metadata | packet | XXXX | | |
1861 | * --------------------------------------------------------- | |
1862 | * <---------------- data_len ---------------> | |
1863 | * | |
1864 | * The rx_offset is fixed for all packets, the meta_len can vary | |
1865 | * on a packet by packet basis. If rx_offset is set to zero | |
1866 | * (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the | |
1867 | * buffer and is immediately followed by the packet (no [XX]). | |
1868 | */ | |
4c352362 JK |
1869 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; |
1870 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
13df4c66 | 1871 | pkt_len = data_len - meta_len; |
4c352362 | 1872 | |
5cd4fbea | 1873 | pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; |
79c12a75 | 1874 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) |
5cd4fbea | 1875 | pkt_off += meta_len; |
180012dc | 1876 | else |
5cd4fbea JK |
1877 | pkt_off += dp->rx_offset; |
1878 | meta_off = pkt_off - meta_len; | |
4c352362 | 1879 | |
4c352362 JK |
1880 | /* Stats update */ |
1881 | u64_stats_update_begin(&r_vec->rx_sync); | |
1882 | r_vec->rx_pkts++; | |
13df4c66 | 1883 | r_vec->rx_bytes += pkt_len; |
4c352362 JK |
1884 | u64_stats_update_end(&r_vec->rx_sync); |
1885 | ||
b92fb77f JK |
1886 | if (unlikely(meta_len > NFP_NET_MAX_PREPEND || |
1887 | (dp->rx_offset && meta_len > dp->rx_offset))) { | |
1888 | nn_dp_warn(dp, "oversized RX packet metadata %u\n", | |
1889 | meta_len); | |
6fe0c3b4 | 1890 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
b92fb77f JK |
1891 | continue; |
1892 | } | |
1893 | ||
5cd4fbea JK |
1894 | nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, |
1895 | data_len); | |
1896 | ||
e524a6a9 JK |
1897 | if (!dp->chained_metadata_format) { |
1898 | nfp_net_set_hash_desc(dp->netdev, &meta, | |
1899 | rxbuf->frag + meta_off, rxd); | |
1900 | } else if (meta_len) { | |
572c7245 JK |
1901 | if (unlikely(nfp_net_parse_meta(dp->netdev, &meta, |
1902 | rxbuf->frag + meta_off, | |
1903 | rxbuf->frag + pkt_off, | |
6a35ddc5 | 1904 | pkt_len, meta_len))) { |
e524a6a9 JK |
1905 | nn_dp_warn(dp, "invalid RX packet metadata\n"); |
1906 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, | |
1907 | NULL); | |
1908 | continue; | |
1909 | } | |
1910 | } | |
1911 | ||
5f428401 | 1912 | if (xdp_prog && !meta.portid) { |
65d88fd0 | 1913 | void *orig_data = rxbuf->frag + pkt_off; |
1abae319 | 1914 | unsigned int dma_off; |
ecd63a02 JK |
1915 | int act; |
1916 | ||
65d88fd0 DB |
1917 | xdp.data_hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM; |
1918 | xdp.data = orig_data; | |
1919 | xdp.data_meta = orig_data; | |
1920 | xdp.data_end = orig_data + pkt_len; | |
1921 | ||
1922 | act = bpf_prog_run_xdp(xdp_prog, &xdp); | |
1923 | ||
5a6a22e3 | 1924 | pkt_len = xdp.data_end - xdp.data; |
65d88fd0 | 1925 | pkt_off += xdp.data - orig_data; |
6fe0c3b4 | 1926 | |
ecd63a02 JK |
1927 | switch (act) { |
1928 | case XDP_PASS: | |
65d88fd0 | 1929 | meta_len_xdp = xdp.data - xdp.data_meta; |
ecd63a02 JK |
1930 | break; |
1931 | case XDP_TX: | |
5cd4fbea | 1932 | dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM; |
79c12a75 | 1933 | if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring, |
a67edbf4 | 1934 | tx_ring, rxbuf, |
1abae319 | 1935 | dma_off, |
abeeec4a JK |
1936 | pkt_len, |
1937 | &xdp_tx_cmpl))) | |
79c12a75 JK |
1938 | trace_xdp_exception(dp->netdev, |
1939 | xdp_prog, act); | |
ecd63a02 JK |
1940 | continue; |
1941 | default: | |
1942 | bpf_warn_invalid_xdp_action(act); | |
df561f66 | 1943 | fallthrough; |
ecd63a02 | 1944 | case XDP_ABORTED: |
79c12a75 | 1945 | trace_xdp_exception(dp->netdev, xdp_prog, act); |
df561f66 | 1946 | fallthrough; |
ecd63a02 | 1947 | case XDP_DROP: |
6fe0c3b4 | 1948 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, |
ecd63a02 JK |
1949 | rxbuf->dma_addr); |
1950 | continue; | |
1951 | } | |
1952 | } | |
1953 | ||
78a8b760 JK |
1954 | if (likely(!meta.portid)) { |
1955 | netdev = dp->netdev; | |
79ca38e8 JK |
1956 | } else if (meta.portid == NFP_META_PORT_ID_CTRL) { |
1957 | struct nfp_net *nn = netdev_priv(dp->netdev); | |
1958 | ||
1959 | nfp_app_ctrl_rx_raw(nn->app, rxbuf->frag + pkt_off, | |
1960 | pkt_len); | |
1961 | nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, | |
1962 | rxbuf->dma_addr); | |
1963 | continue; | |
78a8b760 JK |
1964 | } else { |
1965 | struct nfp_net *nn; | |
1966 | ||
1967 | nn = netdev_priv(dp->netdev); | |
27f54b58 JH |
1968 | netdev = nfp_app_dev_get(nn->app, meta.portid, |
1969 | &redir_egress); | |
78a8b760 JK |
1970 | if (unlikely(!netdev)) { |
1971 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, | |
1972 | NULL); | |
1973 | continue; | |
1974 | } | |
27f54b58 JH |
1975 | |
1976 | if (nfp_netdev_is_nfp_repr(netdev)) | |
1977 | nfp_repr_inc_rx_stats(netdev, pkt_len); | |
78a8b760 JK |
1978 | } |
1979 | ||
ecd63a02 | 1980 | skb = build_skb(rxbuf->frag, true_bufsz); |
13df4c66 | 1981 | if (unlikely(!skb)) { |
6fe0c3b4 | 1982 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); |
13df4c66 JK |
1983 | continue; |
1984 | } | |
c487e6b1 | 1985 | new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); |
13df4c66 | 1986 | if (unlikely(!new_frag)) { |
6fe0c3b4 | 1987 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); |
13df4c66 JK |
1988 | continue; |
1989 | } | |
1990 | ||
1691a4c0 JK |
1991 | nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); |
1992 | ||
1993 | nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); | |
1994 | ||
5cd4fbea | 1995 | skb_reserve(skb, pkt_off); |
13df4c66 JK |
1996 | skb_put(skb, pkt_len); |
1997 | ||
e524a6a9 JK |
1998 | skb->mark = meta.mark; |
1999 | skb_set_hash(skb, meta.hash, meta.hash_type); | |
19d0f54e | 2000 | |
4c352362 | 2001 | skb_record_rx_queue(skb, rx_ring->idx); |
91bf82ca | 2002 | skb->protocol = eth_type_trans(skb, netdev); |
4c352362 | 2003 | |
ddb98d94 | 2004 | nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb); |
4c352362 | 2005 | |
5bcb5c7e DM |
2006 | #ifdef CONFIG_TLS_DEVICE |
2007 | if (rxd->rxd.flags & PCIE_DESC_RX_DECRYPTED) { | |
2008 | skb->decrypted = true; | |
2009 | u64_stats_update_begin(&r_vec->rx_sync); | |
2010 | r_vec->hw_tls_rx++; | |
2011 | u64_stats_update_end(&r_vec->rx_sync); | |
2012 | } | |
2013 | #endif | |
2014 | ||
4c352362 JK |
2015 | if (rxd->rxd.flags & PCIE_DESC_RX_VLAN) |
2016 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), | |
2017 | le16_to_cpu(rxd->rxd.vlan)); | |
65d88fd0 DB |
2018 | if (meta_len_xdp) |
2019 | skb_metadata_set(skb, meta_len_xdp); | |
4c352362 | 2020 | |
27f54b58 JH |
2021 | if (likely(!redir_egress)) { |
2022 | napi_gro_receive(&rx_ring->r_vec->napi, skb); | |
2023 | } else { | |
2024 | skb->dev = netdev; | |
dce5cccc | 2025 | skb_reset_network_header(skb); |
27f54b58 JH |
2026 | __skb_push(skb, ETH_HLEN); |
2027 | dev_queue_xmit(skb); | |
2028 | } | |
4c352362 JK |
2029 | } |
2030 | ||
abeeec4a JK |
2031 | if (xdp_prog) { |
2032 | if (tx_ring->wr_ptr_add) | |
2033 | nfp_net_tx_xmit_more_flush(tx_ring); | |
2034 | else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) && | |
2035 | !xdp_tx_cmpl) | |
2036 | if (!nfp_net_xdp_complete(tx_ring)) | |
2037 | pkts_polled = budget; | |
2038 | } | |
ecd63a02 JK |
2039 | rcu_read_unlock(); |
2040 | ||
4c352362 JK |
2041 | return pkts_polled; |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * nfp_net_poll() - napi poll function | |
2046 | * @napi: NAPI structure | |
2047 | * @budget: NAPI budget | |
2048 | * | |
2049 | * Return: number of packets polled. | |
2050 | */ | |
2051 | static int nfp_net_poll(struct napi_struct *napi, int budget) | |
2052 | { | |
2053 | struct nfp_net_r_vector *r_vec = | |
2054 | container_of(napi, struct nfp_net_r_vector, napi); | |
cbeaf7aa | 2055 | unsigned int pkts_polled = 0; |
4c352362 | 2056 | |
cbeaf7aa | 2057 | if (r_vec->tx_ring) |
d387b8a1 | 2058 | nfp_net_tx_complete(r_vec->tx_ring, budget); |
abeeec4a | 2059 | if (r_vec->rx_ring) |
cbeaf7aa | 2060 | pkts_polled = nfp_net_rx(r_vec->rx_ring, budget); |
4c352362 | 2061 | |
7de5f115 JK |
2062 | if (pkts_polled < budget) |
2063 | if (napi_complete_done(napi, pkts_polled)) | |
2064 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); | |
4c352362 JK |
2065 | |
2066 | return pkts_polled; | |
2067 | } | |
2068 | ||
77ece8d5 JK |
2069 | /* Control device data path |
2070 | */ | |
2071 | ||
2072 | static bool | |
2073 | nfp_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
2074 | struct sk_buff *skb, bool old) | |
2075 | { | |
2076 | unsigned int real_len = skb->len, meta_len = 0; | |
2077 | struct nfp_net_tx_ring *tx_ring; | |
2078 | struct nfp_net_tx_buf *txbuf; | |
2079 | struct nfp_net_tx_desc *txd; | |
2080 | struct nfp_net_dp *dp; | |
2081 | dma_addr_t dma_addr; | |
2082 | int wr_idx; | |
2083 | ||
2084 | dp = &r_vec->nfp_net->dp; | |
2085 | tx_ring = r_vec->tx_ring; | |
2086 | ||
2087 | if (WARN_ON_ONCE(skb_shinfo(skb)->nr_frags)) { | |
2088 | nn_dp_warn(dp, "Driver's CTRL TX does not implement gather\n"); | |
2089 | goto err_free; | |
2090 | } | |
2091 | ||
2092 | if (unlikely(nfp_net_tx_full(tx_ring, 1))) { | |
2093 | u64_stats_update_begin(&r_vec->tx_sync); | |
2094 | r_vec->tx_busy++; | |
2095 | u64_stats_update_end(&r_vec->tx_sync); | |
2096 | if (!old) | |
2097 | __skb_queue_tail(&r_vec->queue, skb); | |
2098 | else | |
2099 | __skb_queue_head(&r_vec->queue, skb); | |
2100 | return true; | |
2101 | } | |
2102 | ||
2103 | if (nfp_app_ctrl_has_meta(nn->app)) { | |
2104 | if (unlikely(skb_headroom(skb) < 8)) { | |
2105 | nn_dp_warn(dp, "CTRL TX on skb without headroom\n"); | |
2106 | goto err_free; | |
2107 | } | |
2108 | meta_len = 8; | |
2109 | put_unaligned_be32(NFP_META_PORT_ID_CTRL, skb_push(skb, 4)); | |
2110 | put_unaligned_be32(NFP_NET_META_PORTID, skb_push(skb, 4)); | |
2111 | } | |
2112 | ||
2113 | /* Start with the head skbuf */ | |
2114 | dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb), | |
2115 | DMA_TO_DEVICE); | |
2116 | if (dma_mapping_error(dp->dev, dma_addr)) | |
2117 | goto err_dma_warn; | |
2118 | ||
2119 | wr_idx = D_IDX(tx_ring, tx_ring->wr_p); | |
2120 | ||
2121 | /* Stash the soft descriptor of the head then initialize it */ | |
2122 | txbuf = &tx_ring->txbufs[wr_idx]; | |
2123 | txbuf->skb = skb; | |
2124 | txbuf->dma_addr = dma_addr; | |
2125 | txbuf->fidx = -1; | |
2126 | txbuf->pkt_cnt = 1; | |
2127 | txbuf->real_len = real_len; | |
2128 | ||
2129 | /* Build TX descriptor */ | |
2130 | txd = &tx_ring->txds[wr_idx]; | |
2131 | txd->offset_eop = meta_len | PCIE_DESC_TX_EOP; | |
2132 | txd->dma_len = cpu_to_le16(skb_headlen(skb)); | |
2133 | nfp_desc_set_dma_addr(txd, dma_addr); | |
2134 | txd->data_len = cpu_to_le16(skb->len); | |
2135 | ||
2136 | txd->flags = 0; | |
2137 | txd->mss = 0; | |
2138 | txd->lso_hdrlen = 0; | |
2139 | ||
2140 | tx_ring->wr_p++; | |
2141 | tx_ring->wr_ptr_add++; | |
2142 | nfp_net_tx_xmit_more_flush(tx_ring); | |
2143 | ||
2144 | return false; | |
2145 | ||
2146 | err_dma_warn: | |
2147 | nn_dp_warn(dp, "Failed to DMA map TX CTRL buffer\n"); | |
2148 | err_free: | |
2149 | u64_stats_update_begin(&r_vec->tx_sync); | |
2150 | r_vec->tx_errors++; | |
2151 | u64_stats_update_end(&r_vec->tx_sync); | |
2152 | dev_kfree_skb_any(skb); | |
2153 | return false; | |
2154 | } | |
2155 | ||
d48ae231 JK |
2156 | bool __nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb) |
2157 | { | |
2158 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[0]; | |
2159 | ||
2160 | return nfp_ctrl_tx_one(nn, r_vec, skb, false); | |
2161 | } | |
2162 | ||
77ece8d5 JK |
2163 | bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb) |
2164 | { | |
2165 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[0]; | |
2166 | bool ret; | |
2167 | ||
2168 | spin_lock_bh(&r_vec->lock); | |
2169 | ret = nfp_ctrl_tx_one(nn, r_vec, skb, false); | |
2170 | spin_unlock_bh(&r_vec->lock); | |
2171 | ||
2172 | return ret; | |
2173 | } | |
2174 | ||
2175 | static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector *r_vec) | |
2176 | { | |
2177 | struct sk_buff *skb; | |
2178 | ||
2179 | while ((skb = __skb_dequeue(&r_vec->queue))) | |
2180 | if (nfp_ctrl_tx_one(r_vec->nfp_net, r_vec, skb, true)) | |
2181 | return; | |
2182 | } | |
2183 | ||
2184 | static bool | |
2185 | nfp_ctrl_meta_ok(struct nfp_net *nn, void *data, unsigned int meta_len) | |
2186 | { | |
2187 | u32 meta_type, meta_tag; | |
2188 | ||
2189 | if (!nfp_app_ctrl_has_meta(nn->app)) | |
2190 | return !meta_len; | |
2191 | ||
2192 | if (meta_len != 8) | |
2193 | return false; | |
2194 | ||
2195 | meta_type = get_unaligned_be32(data); | |
2196 | meta_tag = get_unaligned_be32(data + 4); | |
2197 | ||
2198 | return (meta_type == NFP_NET_META_PORTID && | |
2199 | meta_tag == NFP_META_PORT_ID_CTRL); | |
2200 | } | |
2201 | ||
2202 | static bool | |
2203 | nfp_ctrl_rx_one(struct nfp_net *nn, struct nfp_net_dp *dp, | |
2204 | struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring) | |
2205 | { | |
2206 | unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off; | |
2207 | struct nfp_net_rx_buf *rxbuf; | |
2208 | struct nfp_net_rx_desc *rxd; | |
2209 | dma_addr_t new_dma_addr; | |
2210 | struct sk_buff *skb; | |
2211 | void *new_frag; | |
2212 | int idx; | |
2213 | ||
2214 | idx = D_IDX(rx_ring, rx_ring->rd_p); | |
2215 | ||
2216 | rxd = &rx_ring->rxds[idx]; | |
2217 | if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) | |
2218 | return false; | |
2219 | ||
2220 | /* Memory barrier to ensure that we won't do other reads | |
2221 | * before the DD bit. | |
2222 | */ | |
2223 | dma_rmb(); | |
2224 | ||
2225 | rx_ring->rd_p++; | |
2226 | ||
2227 | rxbuf = &rx_ring->rxbufs[idx]; | |
2228 | meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK; | |
2229 | data_len = le16_to_cpu(rxd->rxd.data_len); | |
2230 | pkt_len = data_len - meta_len; | |
2231 | ||
2232 | pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off; | |
2233 | if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC) | |
2234 | pkt_off += meta_len; | |
2235 | else | |
2236 | pkt_off += dp->rx_offset; | |
2237 | meta_off = pkt_off - meta_len; | |
2238 | ||
2239 | /* Stats update */ | |
2240 | u64_stats_update_begin(&r_vec->rx_sync); | |
2241 | r_vec->rx_pkts++; | |
2242 | r_vec->rx_bytes += pkt_len; | |
2243 | u64_stats_update_end(&r_vec->rx_sync); | |
2244 | ||
2245 | nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, data_len); | |
2246 | ||
2247 | if (unlikely(!nfp_ctrl_meta_ok(nn, rxbuf->frag + meta_off, meta_len))) { | |
2248 | nn_dp_warn(dp, "incorrect metadata for ctrl packet (%d)\n", | |
2249 | meta_len); | |
2250 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); | |
2251 | return true; | |
2252 | } | |
2253 | ||
2254 | skb = build_skb(rxbuf->frag, dp->fl_bufsz); | |
2255 | if (unlikely(!skb)) { | |
2256 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL); | |
2257 | return true; | |
2258 | } | |
2259 | new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr); | |
2260 | if (unlikely(!new_frag)) { | |
2261 | nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb); | |
2262 | return true; | |
2263 | } | |
2264 | ||
2265 | nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr); | |
2266 | ||
2267 | nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr); | |
2268 | ||
2269 | skb_reserve(skb, pkt_off); | |
2270 | skb_put(skb, pkt_len); | |
2271 | ||
02082701 | 2272 | nfp_app_ctrl_rx(nn->app, skb); |
77ece8d5 JK |
2273 | |
2274 | return true; | |
2275 | } | |
2276 | ||
ff58e2df | 2277 | static bool nfp_ctrl_rx(struct nfp_net_r_vector *r_vec) |
77ece8d5 JK |
2278 | { |
2279 | struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring; | |
2280 | struct nfp_net *nn = r_vec->nfp_net; | |
2281 | struct nfp_net_dp *dp = &nn->dp; | |
ff58e2df | 2282 | unsigned int budget = 512; |
77ece8d5 | 2283 | |
ff58e2df | 2284 | while (nfp_ctrl_rx_one(nn, dp, r_vec, rx_ring) && budget--) |
77ece8d5 | 2285 | continue; |
ff58e2df JK |
2286 | |
2287 | return budget; | |
77ece8d5 JK |
2288 | } |
2289 | ||
2290 | static void nfp_ctrl_poll(unsigned long arg) | |
2291 | { | |
2292 | struct nfp_net_r_vector *r_vec = (void *)arg; | |
2293 | ||
6577b0f7 | 2294 | spin_lock(&r_vec->lock); |
d387b8a1 | 2295 | nfp_net_tx_complete(r_vec->tx_ring, 0); |
77ece8d5 | 2296 | __nfp_ctrl_tx_queued(r_vec); |
6577b0f7 | 2297 | spin_unlock(&r_vec->lock); |
77ece8d5 | 2298 | |
ff58e2df JK |
2299 | if (nfp_ctrl_rx(r_vec)) { |
2300 | nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry); | |
2301 | } else { | |
2302 | tasklet_schedule(&r_vec->tasklet); | |
2303 | nn_dp_warn(&r_vec->nfp_net->dp, | |
2304 | "control message budget exceeded!\n"); | |
2305 | } | |
77ece8d5 JK |
2306 | } |
2307 | ||
4c352362 JK |
2308 | /* Setup and Configuration |
2309 | */ | |
2310 | ||
cd083ce1 JK |
2311 | /** |
2312 | * nfp_net_vecs_init() - Assign IRQs and setup rvecs. | |
2313 | * @nn: NFP Network structure | |
2314 | */ | |
2315 | static void nfp_net_vecs_init(struct nfp_net *nn) | |
2316 | { | |
2317 | struct nfp_net_r_vector *r_vec; | |
2318 | int r; | |
2319 | ||
2320 | nn->lsc_handler = nfp_net_irq_lsc; | |
2321 | nn->exn_handler = nfp_net_irq_exn; | |
2322 | ||
2323 | for (r = 0; r < nn->max_r_vecs; r++) { | |
2324 | struct msix_entry *entry; | |
2325 | ||
2326 | entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r]; | |
2327 | ||
2328 | r_vec = &nn->r_vecs[r]; | |
2329 | r_vec->nfp_net = nn; | |
cd083ce1 JK |
2330 | r_vec->irq_entry = entry->entry; |
2331 | r_vec->irq_vector = entry->vector; | |
2332 | ||
77ece8d5 JK |
2333 | if (nn->dp.netdev) { |
2334 | r_vec->handler = nfp_net_irq_rxtx; | |
2335 | } else { | |
2336 | r_vec->handler = nfp_ctrl_irq_rxtx; | |
2337 | ||
2338 | __skb_queue_head_init(&r_vec->queue); | |
2339 | spin_lock_init(&r_vec->lock); | |
2340 | tasklet_init(&r_vec->tasklet, nfp_ctrl_poll, | |
2341 | (unsigned long)r_vec); | |
2342 | tasklet_disable(&r_vec->tasklet); | |
2343 | } | |
2344 | ||
cd083ce1 JK |
2345 | cpumask_set_cpu(r, &r_vec->affinity_mask); |
2346 | } | |
2347 | } | |
2348 | ||
4c352362 JK |
2349 | /** |
2350 | * nfp_net_tx_ring_free() - Free resources allocated to a TX ring | |
2351 | * @tx_ring: TX ring to free | |
2352 | */ | |
2353 | static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring) | |
2354 | { | |
2355 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
79c12a75 | 2356 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 2357 | |
46627170 | 2358 | kvfree(tx_ring->txbufs); |
4c352362 JK |
2359 | |
2360 | if (tx_ring->txds) | |
79c12a75 | 2361 | dma_free_coherent(dp->dev, tx_ring->size, |
4c352362 JK |
2362 | tx_ring->txds, tx_ring->dma); |
2363 | ||
2364 | tx_ring->cnt = 0; | |
4c352362 JK |
2365 | tx_ring->txbufs = NULL; |
2366 | tx_ring->txds = NULL; | |
2367 | tx_ring->dma = 0; | |
2368 | tx_ring->size = 0; | |
2369 | } | |
2370 | ||
2371 | /** | |
2372 | * nfp_net_tx_ring_alloc() - Allocate resource for a TX ring | |
892a7f70 | 2373 | * @dp: NFP Net data path struct |
4c352362 JK |
2374 | * @tx_ring: TX Ring structure to allocate |
2375 | * | |
2376 | * Return: 0 on success, negative errno otherwise. | |
2377 | */ | |
ecd63a02 | 2378 | static int |
92e68195 | 2379 | nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring) |
4c352362 JK |
2380 | { |
2381 | struct nfp_net_r_vector *r_vec = tx_ring->r_vec; | |
4c352362 | 2382 | |
892a7f70 | 2383 | tx_ring->cnt = dp->txd_cnt; |
4c352362 | 2384 | |
5ea14712 | 2385 | tx_ring->size = array_size(tx_ring->cnt, sizeof(*tx_ring->txds)); |
750afb08 LC |
2386 | tx_ring->txds = dma_alloc_coherent(dp->dev, tx_ring->size, |
2387 | &tx_ring->dma, | |
2388 | GFP_KERNEL | __GFP_NOWARN); | |
23d9f553 JK |
2389 | if (!tx_ring->txds) { |
2390 | netdev_warn(dp->netdev, "failed to allocate TX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", | |
2391 | tx_ring->cnt); | |
4c352362 | 2392 | goto err_alloc; |
23d9f553 | 2393 | } |
4c352362 | 2394 | |
46627170 JK |
2395 | tx_ring->txbufs = kvcalloc(tx_ring->cnt, sizeof(*tx_ring->txbufs), |
2396 | GFP_KERNEL); | |
4c352362 JK |
2397 | if (!tx_ring->txbufs) |
2398 | goto err_alloc; | |
2399 | ||
a7b1ad08 | 2400 | if (!tx_ring->is_xdp && dp->netdev) |
79c12a75 | 2401 | netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask, |
ecd63a02 | 2402 | tx_ring->idx); |
4c352362 | 2403 | |
4c352362 JK |
2404 | return 0; |
2405 | ||
2406 | err_alloc: | |
2407 | nfp_net_tx_ring_free(tx_ring); | |
2408 | return -ENOMEM; | |
2409 | } | |
2410 | ||
92e68195 JK |
2411 | static void |
2412 | nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp, | |
2413 | struct nfp_net_tx_ring *tx_ring) | |
2414 | { | |
2415 | unsigned int i; | |
2416 | ||
2417 | if (!tx_ring->is_xdp) | |
2418 | return; | |
2419 | ||
2420 | for (i = 0; i < tx_ring->cnt; i++) { | |
2421 | if (!tx_ring->txbufs[i].frag) | |
2422 | return; | |
2423 | ||
2424 | nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr); | |
2425 | __free_page(virt_to_page(tx_ring->txbufs[i].frag)); | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | static int | |
2430 | nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp, | |
2431 | struct nfp_net_tx_ring *tx_ring) | |
2432 | { | |
2433 | struct nfp_net_tx_buf *txbufs = tx_ring->txbufs; | |
2434 | unsigned int i; | |
2435 | ||
2436 | if (!tx_ring->is_xdp) | |
2437 | return 0; | |
2438 | ||
2439 | for (i = 0; i < tx_ring->cnt; i++) { | |
2440 | txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr); | |
2441 | if (!txbufs[i].frag) { | |
2442 | nfp_net_tx_ring_bufs_free(dp, tx_ring); | |
2443 | return -ENOMEM; | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | return 0; | |
2448 | } | |
2449 | ||
892a7f70 | 2450 | static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
cc7c0333 | 2451 | { |
cc7c0333 JK |
2452 | unsigned int r; |
2453 | ||
892a7f70 JK |
2454 | dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings), |
2455 | GFP_KERNEL); | |
2456 | if (!dp->tx_rings) | |
2457 | return -ENOMEM; | |
cc7c0333 | 2458 | |
892a7f70 | 2459 | for (r = 0; r < dp->num_tx_rings; r++) { |
ecd63a02 JK |
2460 | int bias = 0; |
2461 | ||
512e94dc JK |
2462 | if (r >= dp->num_stack_tx_rings) |
2463 | bias = dp->num_stack_tx_rings; | |
cc7c0333 | 2464 | |
892a7f70 | 2465 | nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias], |
92e68195 | 2466 | r, bias); |
ecd63a02 | 2467 | |
92e68195 | 2468 | if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r])) |
cc7c0333 | 2469 | goto err_free_prev; |
92e68195 JK |
2470 | |
2471 | if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r])) | |
2472 | goto err_free_ring; | |
cc7c0333 JK |
2473 | } |
2474 | ||
892a7f70 | 2475 | return 0; |
cc7c0333 JK |
2476 | |
2477 | err_free_prev: | |
92e68195 JK |
2478 | while (r--) { |
2479 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
2480 | err_free_ring: | |
892a7f70 | 2481 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 2482 | } |
892a7f70 JK |
2483 | kfree(dp->tx_rings); |
2484 | return -ENOMEM; | |
cc7c0333 JK |
2485 | } |
2486 | ||
892a7f70 | 2487 | static void nfp_net_tx_rings_free(struct nfp_net_dp *dp) |
cc7c0333 JK |
2488 | { |
2489 | unsigned int r; | |
2490 | ||
92e68195 JK |
2491 | for (r = 0; r < dp->num_tx_rings; r++) { |
2492 | nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]); | |
892a7f70 | 2493 | nfp_net_tx_ring_free(&dp->tx_rings[r]); |
92e68195 | 2494 | } |
cc7c0333 | 2495 | |
892a7f70 | 2496 | kfree(dp->tx_rings); |
cc7c0333 JK |
2497 | } |
2498 | ||
4c352362 JK |
2499 | /** |
2500 | * nfp_net_rx_ring_free() - Free resources allocated to a RX ring | |
2501 | * @rx_ring: RX ring to free | |
2502 | */ | |
2503 | static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring) | |
2504 | { | |
2505 | struct nfp_net_r_vector *r_vec = rx_ring->r_vec; | |
79c12a75 | 2506 | struct nfp_net_dp *dp = &r_vec->nfp_net->dp; |
4c352362 | 2507 | |
a9c324be JK |
2508 | if (dp->netdev) |
2509 | xdp_rxq_info_unreg(&rx_ring->xdp_rxq); | |
46627170 | 2510 | kvfree(rx_ring->rxbufs); |
4c352362 JK |
2511 | |
2512 | if (rx_ring->rxds) | |
79c12a75 | 2513 | dma_free_coherent(dp->dev, rx_ring->size, |
4c352362 JK |
2514 | rx_ring->rxds, rx_ring->dma); |
2515 | ||
2516 | rx_ring->cnt = 0; | |
4c352362 JK |
2517 | rx_ring->rxbufs = NULL; |
2518 | rx_ring->rxds = NULL; | |
2519 | rx_ring->dma = 0; | |
2520 | rx_ring->size = 0; | |
2521 | } | |
2522 | ||
2523 | /** | |
2524 | * nfp_net_rx_ring_alloc() - Allocate resource for a RX ring | |
2195c263 | 2525 | * @dp: NFP Net data path struct |
4c352362 JK |
2526 | * @rx_ring: RX ring to allocate |
2527 | * | |
2528 | * Return: 0 on success, negative errno otherwise. | |
2529 | */ | |
30d21171 | 2530 | static int |
892a7f70 | 2531 | nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring) |
4c352362 | 2532 | { |
46627170 | 2533 | int err; |
7f1c684a | 2534 | |
a9c324be JK |
2535 | if (dp->netdev) { |
2536 | err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, | |
2537 | rx_ring->idx); | |
2538 | if (err < 0) | |
2539 | return err; | |
2540 | } | |
4c352362 | 2541 | |
892a7f70 | 2542 | rx_ring->cnt = dp->rxd_cnt; |
5ea14712 | 2543 | rx_ring->size = array_size(rx_ring->cnt, sizeof(*rx_ring->rxds)); |
750afb08 LC |
2544 | rx_ring->rxds = dma_alloc_coherent(dp->dev, rx_ring->size, |
2545 | &rx_ring->dma, | |
2546 | GFP_KERNEL | __GFP_NOWARN); | |
23d9f553 JK |
2547 | if (!rx_ring->rxds) { |
2548 | netdev_warn(dp->netdev, "failed to allocate RX descriptor ring memory, requested descriptor count: %d, consider lowering descriptor count\n", | |
2549 | rx_ring->cnt); | |
4c352362 | 2550 | goto err_alloc; |
23d9f553 | 2551 | } |
4c352362 | 2552 | |
46627170 JK |
2553 | rx_ring->rxbufs = kvcalloc(rx_ring->cnt, sizeof(*rx_ring->rxbufs), |
2554 | GFP_KERNEL); | |
4c352362 JK |
2555 | if (!rx_ring->rxbufs) |
2556 | goto err_alloc; | |
2557 | ||
4c352362 JK |
2558 | return 0; |
2559 | ||
2560 | err_alloc: | |
2561 | nfp_net_rx_ring_free(rx_ring); | |
2562 | return -ENOMEM; | |
2563 | } | |
2564 | ||
892a7f70 | 2565 | static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp) |
36a857e4 | 2566 | { |
36a857e4 JK |
2567 | unsigned int r; |
2568 | ||
892a7f70 JK |
2569 | dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings), |
2570 | GFP_KERNEL); | |
2571 | if (!dp->rx_rings) | |
2572 | return -ENOMEM; | |
36a857e4 | 2573 | |
892a7f70 JK |
2574 | for (r = 0; r < dp->num_rx_rings; r++) { |
2575 | nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r); | |
36a857e4 | 2576 | |
892a7f70 | 2577 | if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
2578 | goto err_free_prev; |
2579 | ||
892a7f70 | 2580 | if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r])) |
36a857e4 JK |
2581 | goto err_free_ring; |
2582 | } | |
2583 | ||
892a7f70 | 2584 | return 0; |
36a857e4 JK |
2585 | |
2586 | err_free_prev: | |
2587 | while (r--) { | |
892a7f70 | 2588 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); |
36a857e4 | 2589 | err_free_ring: |
892a7f70 | 2590 | nfp_net_rx_ring_free(&dp->rx_rings[r]); |
36a857e4 | 2591 | } |
892a7f70 JK |
2592 | kfree(dp->rx_rings); |
2593 | return -ENOMEM; | |
36a857e4 JK |
2594 | } |
2595 | ||
892a7f70 | 2596 | static void nfp_net_rx_rings_free(struct nfp_net_dp *dp) |
36a857e4 JK |
2597 | { |
2598 | unsigned int r; | |
2599 | ||
892a7f70 JK |
2600 | for (r = 0; r < dp->num_rx_rings; r++) { |
2601 | nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]); | |
2602 | nfp_net_rx_ring_free(&dp->rx_rings[r]); | |
36a857e4 JK |
2603 | } |
2604 | ||
892a7f70 | 2605 | kfree(dp->rx_rings); |
36a857e4 JK |
2606 | } |
2607 | ||
e31230f9 | 2608 | static void |
79c12a75 JK |
2609 | nfp_net_vector_assign_rings(struct nfp_net_dp *dp, |
2610 | struct nfp_net_r_vector *r_vec, int idx) | |
e31230f9 | 2611 | { |
79c12a75 | 2612 | r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL; |
ecd63a02 | 2613 | r_vec->tx_ring = |
79c12a75 | 2614 | idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL; |
ecd63a02 | 2615 | |
79c12a75 JK |
2616 | r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ? |
2617 | &dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL; | |
e31230f9 JK |
2618 | } |
2619 | ||
0afbfb18 JK |
2620 | static int |
2621 | nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, | |
2622 | int idx) | |
4c352362 | 2623 | { |
0afbfb18 | 2624 | int err; |
4c352362 | 2625 | |
164d1e9e | 2626 | /* Setup NAPI */ |
77ece8d5 JK |
2627 | if (nn->dp.netdev) |
2628 | netif_napi_add(nn->dp.netdev, &r_vec->napi, | |
2629 | nfp_net_poll, NAPI_POLL_WEIGHT); | |
2630 | else | |
2631 | tasklet_enable(&r_vec->tasklet); | |
164d1e9e | 2632 | |
0afbfb18 | 2633 | snprintf(r_vec->name, sizeof(r_vec->name), |
77ece8d5 | 2634 | "%s-rxtx-%d", nfp_net_name(nn), idx); |
fdace6c2 JK |
2635 | err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, |
2636 | r_vec); | |
0afbfb18 | 2637 | if (err) { |
77ece8d5 JK |
2638 | if (nn->dp.netdev) |
2639 | netif_napi_del(&r_vec->napi); | |
2640 | else | |
2641 | tasklet_disable(&r_vec->tasklet); | |
2642 | ||
fdace6c2 | 2643 | nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); |
0afbfb18 JK |
2644 | return err; |
2645 | } | |
fdace6c2 | 2646 | disable_irq(r_vec->irq_vector); |
4c352362 | 2647 | |
fdace6c2 | 2648 | irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask); |
4c352362 | 2649 | |
fdace6c2 JK |
2650 | nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector, |
2651 | r_vec->irq_entry); | |
4c352362 | 2652 | |
0afbfb18 | 2653 | return 0; |
4c352362 JK |
2654 | } |
2655 | ||
0afbfb18 JK |
2656 | static void |
2657 | nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec) | |
4c352362 | 2658 | { |
fdace6c2 | 2659 | irq_set_affinity_hint(r_vec->irq_vector, NULL); |
77ece8d5 JK |
2660 | if (nn->dp.netdev) |
2661 | netif_napi_del(&r_vec->napi); | |
2662 | else | |
2663 | tasklet_disable(&r_vec->tasklet); | |
2664 | ||
fdace6c2 | 2665 | free_irq(r_vec->irq_vector, r_vec); |
4c352362 JK |
2666 | } |
2667 | ||
2668 | /** | |
2669 | * nfp_net_rss_write_itbl() - Write RSS indirection table to device | |
2670 | * @nn: NFP Net device to reconfigure | |
2671 | */ | |
2672 | void nfp_net_rss_write_itbl(struct nfp_net *nn) | |
2673 | { | |
2674 | int i; | |
2675 | ||
2676 | for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4) | |
2677 | nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i, | |
2678 | get_unaligned_le32(nn->rss_itbl + i)); | |
2679 | } | |
2680 | ||
2681 | /** | |
2682 | * nfp_net_rss_write_key() - Write RSS hash key to device | |
2683 | * @nn: NFP Net device to reconfigure | |
2684 | */ | |
2685 | void nfp_net_rss_write_key(struct nfp_net *nn) | |
2686 | { | |
2687 | int i; | |
2688 | ||
9ff304bf | 2689 | for (i = 0; i < nfp_net_rss_key_sz(nn); i += 4) |
4c352362 JK |
2690 | nn_writel(nn, NFP_NET_CFG_RSS_KEY + i, |
2691 | get_unaligned_le32(nn->rss_key + i)); | |
2692 | } | |
2693 | ||
2694 | /** | |
2695 | * nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW | |
2696 | * @nn: NFP Net device to reconfigure | |
2697 | */ | |
2698 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn) | |
2699 | { | |
2700 | u8 i; | |
2701 | u32 factor; | |
2702 | u32 value; | |
2703 | ||
2704 | /* Compute factor used to convert coalesce '_usecs' parameters to | |
2705 | * ME timestamp ticks. There are 16 ME clock cycles for each timestamp | |
2706 | * count. | |
2707 | */ | |
ce991ab6 | 2708 | factor = nn->tlv_caps.me_freq_mhz / 16; |
4c352362 JK |
2709 | |
2710 | /* copy RX interrupt coalesce parameters */ | |
2711 | value = (nn->rx_coalesce_max_frames << 16) | | |
2712 | (factor * nn->rx_coalesce_usecs); | |
79c12a75 | 2713 | for (i = 0; i < nn->dp.num_rx_rings; i++) |
4c352362 JK |
2714 | nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value); |
2715 | ||
2716 | /* copy TX interrupt coalesce parameters */ | |
2717 | value = (nn->tx_coalesce_max_frames << 16) | | |
2718 | (factor * nn->tx_coalesce_usecs); | |
79c12a75 | 2719 | for (i = 0; i < nn->dp.num_tx_rings; i++) |
4c352362 JK |
2720 | nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value); |
2721 | } | |
2722 | ||
2723 | /** | |
f642963b | 2724 | * nfp_net_write_mac_addr() - Write mac address to the device control BAR |
4c352362 | 2725 | * @nn: NFP Net device to reconfigure |
9d372759 | 2726 | * @addr: MAC address to write |
4c352362 | 2727 | * |
f642963b JK |
2728 | * Writes the MAC address from the netdev to the device control BAR. Does not |
2729 | * perform the required reconfig. We do a bit of byte swapping dance because | |
2730 | * firmware is LE. | |
4c352362 | 2731 | */ |
9d372759 | 2732 | static void nfp_net_write_mac_addr(struct nfp_net *nn, const u8 *addr) |
4c352362 | 2733 | { |
9d372759 PC |
2734 | nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr)); |
2735 | nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4)); | |
4c352362 JK |
2736 | } |
2737 | ||
ca40feab JK |
2738 | static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx) |
2739 | { | |
2740 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0); | |
2741 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0); | |
2742 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0); | |
2743 | ||
2744 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0); | |
2745 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0); | |
2746 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0); | |
2747 | } | |
2748 | ||
4c352362 JK |
2749 | /** |
2750 | * nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP | |
2751 | * @nn: NFP Net device to reconfigure | |
07300f77 JK |
2752 | * |
2753 | * Warning: must be fully idempotent. | |
4c352362 JK |
2754 | */ |
2755 | static void nfp_net_clear_config_and_disable(struct nfp_net *nn) | |
2756 | { | |
2757 | u32 new_ctrl, update; | |
ca40feab | 2758 | unsigned int r; |
4c352362 JK |
2759 | int err; |
2760 | ||
79c12a75 | 2761 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
2762 | new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE; |
2763 | update = NFP_NET_CFG_UPDATE_GEN; | |
2764 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2765 | update |= NFP_NET_CFG_UPDATE_RING; | |
2766 | ||
2767 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2768 | new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG; | |
2769 | ||
2770 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
2771 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
2772 | ||
2773 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2774 | err = nfp_net_reconfig(nn, update); | |
aba52df8 | 2775 | if (err) |
4c352362 | 2776 | nn_err(nn, "Could not disable device: %d\n", err); |
4c352362 | 2777 | |
79c12a75 JK |
2778 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
2779 | nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]); | |
2780 | for (r = 0; r < nn->dp.num_tx_rings; r++) | |
2781 | nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]); | |
2782 | for (r = 0; r < nn->dp.num_r_vecs; r++) | |
ca40feab JK |
2783 | nfp_net_vec_clear_ring_data(nn, r); |
2784 | ||
79c12a75 | 2785 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
2786 | } |
2787 | ||
ca40feab | 2788 | static void |
cbeaf7aa JK |
2789 | nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn, |
2790 | struct nfp_net_rx_ring *rx_ring, unsigned int idx) | |
ca40feab JK |
2791 | { |
2792 | /* Write the DMA address, size and MSI-X info to the device */ | |
cbeaf7aa JK |
2793 | nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma); |
2794 | nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt)); | |
fdace6c2 | 2795 | nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry); |
cbeaf7aa | 2796 | } |
ca40feab | 2797 | |
cbeaf7aa JK |
2798 | static void |
2799 | nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn, | |
2800 | struct nfp_net_tx_ring *tx_ring, unsigned int idx) | |
2801 | { | |
2802 | nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma); | |
2803 | nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt)); | |
fdace6c2 | 2804 | nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry); |
ca40feab JK |
2805 | } |
2806 | ||
ac0488ef JK |
2807 | /** |
2808 | * nfp_net_set_config_and_enable() - Write control BAR and enable NFP | |
2809 | * @nn: NFP Net device to reconfigure | |
2810 | */ | |
2811 | static int nfp_net_set_config_and_enable(struct nfp_net *nn) | |
1cd0cfc4 | 2812 | { |
ee200a73 | 2813 | u32 bufsz, new_ctrl, update = 0; |
1cd0cfc4 JK |
2814 | unsigned int r; |
2815 | int err; | |
2816 | ||
79c12a75 | 2817 | new_ctrl = nn->dp.ctrl; |
1cd0cfc4 | 2818 | |
611bdd49 | 2819 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) { |
1cd0cfc4 JK |
2820 | nfp_net_rss_write_key(nn); |
2821 | nfp_net_rss_write_itbl(nn); | |
2822 | nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg); | |
2823 | update |= NFP_NET_CFG_UPDATE_RSS; | |
2824 | } | |
2825 | ||
ad50451e | 2826 | if (nn->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) { |
1cd0cfc4 | 2827 | nfp_net_coalesce_write_cfg(nn); |
1cd0cfc4 JK |
2828 | update |= NFP_NET_CFG_UPDATE_IRQMOD; |
2829 | } | |
2830 | ||
79c12a75 JK |
2831 | for (r = 0; r < nn->dp.num_tx_rings; r++) |
2832 | nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r); | |
2833 | for (r = 0; r < nn->dp.num_rx_rings; r++) | |
2834 | nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r); | |
1cd0cfc4 | 2835 | |
79c12a75 JK |
2836 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ? |
2837 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1); | |
1cd0cfc4 | 2838 | |
79c12a75 JK |
2839 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ? |
2840 | 0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1); | |
1cd0cfc4 | 2841 | |
5c0dbe9e JK |
2842 | if (nn->dp.netdev) |
2843 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); | |
1cd0cfc4 | 2844 | |
5c0dbe9e | 2845 | nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu); |
ee200a73 JK |
2846 | |
2847 | bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA; | |
2848 | nn_writel(nn, NFP_NET_CFG_FLBUFSZ, bufsz); | |
1cd0cfc4 JK |
2849 | |
2850 | /* Enable device */ | |
2851 | new_ctrl |= NFP_NET_CFG_CTRL_ENABLE; | |
2852 | update |= NFP_NET_CFG_UPDATE_GEN; | |
2853 | update |= NFP_NET_CFG_UPDATE_MSIX; | |
2854 | update |= NFP_NET_CFG_UPDATE_RING; | |
2855 | if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG) | |
2856 | new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG; | |
2857 | ||
2858 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
2859 | err = nfp_net_reconfig(nn, update); | |
ac0488ef JK |
2860 | if (err) { |
2861 | nfp_net_clear_config_and_disable(nn); | |
2862 | return err; | |
2863 | } | |
1cd0cfc4 | 2864 | |
79c12a75 | 2865 | nn->dp.ctrl = new_ctrl; |
1cd0cfc4 | 2866 | |
79c12a75 | 2867 | for (r = 0; r < nn->dp.num_rx_rings; r++) |
6fe0c3b4 | 2868 | nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]); |
aba52df8 | 2869 | |
ac0488ef | 2870 | return 0; |
1cd0cfc4 JK |
2871 | } |
2872 | ||
d00ca2f3 JK |
2873 | /** |
2874 | * nfp_net_close_stack() - Quiesce the stack (part of close) | |
2875 | * @nn: NFP Net device to reconfigure | |
2876 | */ | |
2877 | static void nfp_net_close_stack(struct nfp_net *nn) | |
2878 | { | |
2879 | unsigned int r; | |
2880 | ||
2881 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); | |
2882 | netif_carrier_off(nn->dp.netdev); | |
2883 | nn->link_up = false; | |
2884 | ||
2885 | for (r = 0; r < nn->dp.num_r_vecs; r++) { | |
2886 | disable_irq(nn->r_vecs[r].irq_vector); | |
2887 | napi_disable(&nn->r_vecs[r].napi); | |
2888 | } | |
2889 | ||
2890 | netif_tx_disable(nn->dp.netdev); | |
2891 | } | |
2892 | ||
2893 | /** | |
2894 | * nfp_net_close_free_all() - Free all runtime resources | |
2895 | * @nn: NFP Net device to reconfigure | |
2896 | */ | |
2897 | static void nfp_net_close_free_all(struct nfp_net *nn) | |
2898 | { | |
2899 | unsigned int r; | |
2900 | ||
4621199d JK |
2901 | nfp_net_tx_rings_free(&nn->dp); |
2902 | nfp_net_rx_rings_free(&nn->dp); | |
2903 | ||
d00ca2f3 JK |
2904 | for (r = 0; r < nn->dp.num_r_vecs; r++) |
2905 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
2906 | ||
d00ca2f3 JK |
2907 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); |
2908 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
2909 | } | |
2910 | ||
2911 | /** | |
2912 | * nfp_net_netdev_close() - Called when the device is downed | |
2913 | * @netdev: netdev structure | |
2914 | */ | |
2915 | static int nfp_net_netdev_close(struct net_device *netdev) | |
2916 | { | |
2917 | struct nfp_net *nn = netdev_priv(netdev); | |
2918 | ||
2919 | /* Step 1: Disable RX and TX rings from the Linux kernel perspective | |
2920 | */ | |
2921 | nfp_net_close_stack(nn); | |
2922 | ||
2923 | /* Step 2: Tell NFP | |
2924 | */ | |
2925 | nfp_net_clear_config_and_disable(nn); | |
447e9ebf | 2926 | nfp_port_configure(netdev, false); |
d00ca2f3 JK |
2927 | |
2928 | /* Step 3: Free resources | |
2929 | */ | |
2930 | nfp_net_close_free_all(nn); | |
2931 | ||
2932 | nn_dbg(nn, "%s down", netdev->name); | |
2933 | return 0; | |
2934 | } | |
2935 | ||
77ece8d5 JK |
2936 | void nfp_ctrl_close(struct nfp_net *nn) |
2937 | { | |
2938 | int r; | |
2939 | ||
2940 | rtnl_lock(); | |
2941 | ||
2942 | for (r = 0; r < nn->dp.num_r_vecs; r++) { | |
2943 | disable_irq(nn->r_vecs[r].irq_vector); | |
2944 | tasklet_disable(&nn->r_vecs[r].tasklet); | |
2945 | } | |
2946 | ||
2947 | nfp_net_clear_config_and_disable(nn); | |
2948 | ||
2949 | nfp_net_close_free_all(nn); | |
2950 | ||
2951 | rtnl_unlock(); | |
2952 | } | |
2953 | ||
1cd0cfc4 JK |
2954 | /** |
2955 | * nfp_net_open_stack() - Start the device from stack's perspective | |
2956 | * @nn: NFP Net device to reconfigure | |
2957 | */ | |
2958 | static void nfp_net_open_stack(struct nfp_net *nn) | |
2959 | { | |
2960 | unsigned int r; | |
2961 | ||
79c12a75 | 2962 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
aba52df8 | 2963 | napi_enable(&nn->r_vecs[r].napi); |
fdace6c2 | 2964 | enable_irq(nn->r_vecs[r].irq_vector); |
aba52df8 | 2965 | } |
1cd0cfc4 | 2966 | |
79c12a75 | 2967 | netif_tx_wake_all_queues(nn->dp.netdev); |
1cd0cfc4 | 2968 | |
ce449ba7 | 2969 | enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
1cd0cfc4 JK |
2970 | nfp_net_read_link_status(nn); |
2971 | } | |
2972 | ||
ee26756d | 2973 | static int nfp_net_open_alloc_all(struct nfp_net *nn) |
4c352362 | 2974 | { |
4c352362 | 2975 | int err, r; |
4c352362 | 2976 | |
4c352362 JK |
2977 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn", |
2978 | nn->exn_name, sizeof(nn->exn_name), | |
2979 | NFP_NET_IRQ_EXN_IDX, nn->exn_handler); | |
2980 | if (err) | |
2981 | return err; | |
0ba40af9 JK |
2982 | err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc", |
2983 | nn->lsc_name, sizeof(nn->lsc_name), | |
2984 | NFP_NET_IRQ_LSC_IDX, nn->lsc_handler); | |
2985 | if (err) | |
2986 | goto err_free_exn; | |
ce449ba7 | 2987 | disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector); |
4c352362 | 2988 | |
79c12a75 | 2989 | for (r = 0; r < nn->dp.num_r_vecs; r++) { |
0afbfb18 JK |
2990 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
2991 | if (err) | |
cbeaf7aa JK |
2992 | goto err_cleanup_vec_p; |
2993 | } | |
a10b563d | 2994 | |
892a7f70 JK |
2995 | err = nfp_net_rx_rings_prepare(nn, &nn->dp); |
2996 | if (err) | |
a10b563d | 2997 | goto err_cleanup_vec; |
114bdef0 | 2998 | |
892a7f70 JK |
2999 | err = nfp_net_tx_rings_prepare(nn, &nn->dp); |
3000 | if (err) | |
a10b563d | 3001 | goto err_free_rx_rings; |
4c352362 | 3002 | |
e31230f9 | 3003 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 3004 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 3005 | |
ee26756d JK |
3006 | return 0; |
3007 | ||
3008 | err_free_rx_rings: | |
3009 | nfp_net_rx_rings_free(&nn->dp); | |
3010 | err_cleanup_vec: | |
3011 | r = nn->dp.num_r_vecs; | |
3012 | err_cleanup_vec_p: | |
3013 | while (r--) | |
3014 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); | |
3015 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX); | |
3016 | err_free_exn: | |
3017 | nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX); | |
3018 | return err; | |
3019 | } | |
3020 | ||
3021 | static int nfp_net_netdev_open(struct net_device *netdev) | |
3022 | { | |
3023 | struct nfp_net *nn = netdev_priv(netdev); | |
3024 | int err; | |
3025 | ||
3026 | /* Step 1: Allocate resources for rings and the like | |
3027 | * - Request interrupts | |
3028 | * - Allocate RX and TX ring resources | |
3029 | * - Setup initial RSS table | |
3030 | */ | |
3031 | err = nfp_net_open_alloc_all(nn); | |
3032 | if (err) | |
3033 | return err; | |
3034 | ||
79c12a75 | 3035 | err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings); |
4c352362 | 3036 | if (err) |
ee26756d | 3037 | goto err_free_all; |
4c352362 | 3038 | |
79c12a75 | 3039 | err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings); |
4c352362 | 3040 | if (err) |
ee26756d | 3041 | goto err_free_all; |
4c352362 | 3042 | |
4c352362 | 3043 | /* Step 2: Configure the NFP |
447e9ebf | 3044 | * - Ifup the physical interface if it exists |
4c352362 JK |
3045 | * - Enable rings from 0 to tx_rings/rx_rings - 1. |
3046 | * - Write MAC address (in case it changed) | |
3047 | * - Set the MTU | |
3048 | * - Set the Freelist buffer size | |
3049 | * - Enable the FW | |
3050 | */ | |
447e9ebf | 3051 | err = nfp_port_configure(netdev, true); |
4c352362 | 3052 | if (err) |
ee26756d | 3053 | goto err_free_all; |
4c352362 | 3054 | |
447e9ebf DM |
3055 | err = nfp_net_set_config_and_enable(nn); |
3056 | if (err) | |
3057 | goto err_port_disable; | |
3058 | ||
4c352362 JK |
3059 | /* Step 3: Enable for kernel |
3060 | * - put some freelist descriptors on each RX ring | |
3061 | * - enable NAPI on each ring | |
3062 | * - enable all TX queues | |
3063 | * - set link state | |
3064 | */ | |
1cd0cfc4 | 3065 | nfp_net_open_stack(nn); |
4c352362 JK |
3066 | |
3067 | return 0; | |
3068 | ||
447e9ebf DM |
3069 | err_port_disable: |
3070 | nfp_port_configure(netdev, false); | |
ee26756d JK |
3071 | err_free_all: |
3072 | nfp_net_close_free_all(nn); | |
4c352362 JK |
3073 | return err; |
3074 | } | |
3075 | ||
77ece8d5 JK |
3076 | int nfp_ctrl_open(struct nfp_net *nn) |
3077 | { | |
3078 | int err, r; | |
3079 | ||
3080 | /* ring dumping depends on vNICs being opened/closed under rtnl */ | |
3081 | rtnl_lock(); | |
3082 | ||
3083 | err = nfp_net_open_alloc_all(nn); | |
3084 | if (err) | |
3085 | goto err_unlock; | |
3086 | ||
3087 | err = nfp_net_set_config_and_enable(nn); | |
3088 | if (err) | |
3089 | goto err_free_all; | |
3090 | ||
3091 | for (r = 0; r < nn->dp.num_r_vecs; r++) | |
3092 | enable_irq(nn->r_vecs[r].irq_vector); | |
3093 | ||
3094 | rtnl_unlock(); | |
3095 | ||
3096 | return 0; | |
3097 | ||
3098 | err_free_all: | |
3099 | nfp_net_close_free_all(nn); | |
3100 | err_unlock: | |
3101 | rtnl_unlock(); | |
3102 | return err; | |
3103 | } | |
3104 | ||
4c352362 JK |
3105 | static void nfp_net_set_rx_mode(struct net_device *netdev) |
3106 | { | |
3107 | struct nfp_net *nn = netdev_priv(netdev); | |
3108 | u32 new_ctrl; | |
3109 | ||
79c12a75 | 3110 | new_ctrl = nn->dp.ctrl; |
4c352362 | 3111 | |
d0adb51e JK |
3112 | if (!netdev_mc_empty(netdev) || netdev->flags & IFF_ALLMULTI) |
3113 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_L2MC; | |
3114 | else | |
3115 | new_ctrl &= ~NFP_NET_CFG_CTRL_L2MC; | |
3116 | ||
4c352362 JK |
3117 | if (netdev->flags & IFF_PROMISC) { |
3118 | if (nn->cap & NFP_NET_CFG_CTRL_PROMISC) | |
3119 | new_ctrl |= NFP_NET_CFG_CTRL_PROMISC; | |
3120 | else | |
3121 | nn_warn(nn, "FW does not support promiscuous mode\n"); | |
3122 | } else { | |
3123 | new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC; | |
3124 | } | |
3125 | ||
79c12a75 | 3126 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
3127 | return; |
3128 | ||
3129 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); | |
3d780b92 | 3130 | nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN); |
4c352362 | 3131 | |
79c12a75 | 3132 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
3133 | } |
3134 | ||
1e9e10d0 JK |
3135 | static void nfp_net_rss_init_itbl(struct nfp_net *nn) |
3136 | { | |
3137 | int i; | |
3138 | ||
3139 | for (i = 0; i < sizeof(nn->rss_itbl); i++) | |
3140 | nn->rss_itbl[i] = | |
79c12a75 | 3141 | ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings); |
1e9e10d0 JK |
3142 | } |
3143 | ||
512e94dc JK |
3144 | static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp) |
3145 | { | |
3146 | struct nfp_net_dp new_dp = *dp; | |
3147 | ||
3148 | *dp = nn->dp; | |
3149 | nn->dp = new_dp; | |
76e1e1a8 JK |
3150 | |
3151 | nn->dp.netdev->mtu = new_dp.mtu; | |
892a7f70 JK |
3152 | |
3153 | if (!netif_is_rxfh_configured(nn->dp.netdev)) | |
3154 | nfp_net_rss_init_itbl(nn); | |
512e94dc JK |
3155 | } |
3156 | ||
892a7f70 | 3157 | static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp) |
4c352362 | 3158 | { |
e31230f9 | 3159 | unsigned int r; |
164d1e9e | 3160 | int err; |
e31230f9 | 3161 | |
892a7f70 | 3162 | nfp_net_dp_swap(nn, dp); |
164d1e9e | 3163 | |
e31230f9 | 3164 | for (r = 0; r < nn->max_r_vecs; r++) |
79c12a75 | 3165 | nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r); |
e31230f9 | 3166 | |
79c12a75 | 3167 | err = netif_set_real_num_rx_queues(nn->dp.netdev, nn->dp.num_rx_rings); |
08348995 AB |
3168 | if (err) |
3169 | return err; | |
164d1e9e | 3170 | |
79c12a75 JK |
3171 | if (nn->dp.netdev->real_num_tx_queues != nn->dp.num_stack_tx_rings) { |
3172 | err = netif_set_real_num_tx_queues(nn->dp.netdev, | |
3173 | nn->dp.num_stack_tx_rings); | |
164d1e9e JK |
3174 | if (err) |
3175 | return err; | |
3176 | } | |
3177 | ||
ac0488ef | 3178 | return nfp_net_set_config_and_enable(nn); |
68453c7a | 3179 | } |
36a857e4 | 3180 | |
783496b0 JK |
3181 | struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn) |
3182 | { | |
3183 | struct nfp_net_dp *new; | |
3184 | ||
3185 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
3186 | if (!new) | |
3187 | return NULL; | |
3188 | ||
3189 | *new = nn->dp; | |
3190 | ||
3191 | /* Clear things which need to be recomputed */ | |
3192 | new->fl_bufsz = 0; | |
3193 | new->tx_rings = NULL; | |
3194 | new->rx_rings = NULL; | |
3195 | new->num_r_vecs = 0; | |
3196 | new->num_stack_tx_rings = 0; | |
3197 | ||
3198 | return new; | |
3199 | } | |
3200 | ||
d957c0f7 JK |
3201 | static int |
3202 | nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp, | |
3203 | struct netlink_ext_ack *extack) | |
ecd63a02 JK |
3204 | { |
3205 | /* XDP-enabled tests */ | |
9dc6b116 | 3206 | if (!dp->xdp_prog) |
ecd63a02 | 3207 | return 0; |
2195c263 | 3208 | if (dp->fl_bufsz > PAGE_SIZE) { |
4d463c4d | 3209 | NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled"); |
ecd63a02 JK |
3210 | return -EINVAL; |
3211 | } | |
892a7f70 | 3212 | if (dp->num_tx_rings > nn->max_tx_rings) { |
4d463c4d | 3213 | NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled"); |
ecd63a02 JK |
3214 | return -EINVAL; |
3215 | } | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
d957c0f7 JK |
3220 | int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp, |
3221 | struct netlink_ext_ack *extack) | |
cc7c0333 | 3222 | { |
512e94dc | 3223 | int r, err; |
cc7c0333 | 3224 | |
76e1e1a8 | 3225 | dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp); |
2195c263 | 3226 | |
892a7f70 | 3227 | dp->num_stack_tx_rings = dp->num_tx_rings; |
9dc6b116 | 3228 | if (dp->xdp_prog) |
892a7f70 | 3229 | dp->num_stack_tx_rings -= dp->num_rx_rings; |
ecd63a02 | 3230 | |
892a7f70 | 3231 | dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings); |
ecd63a02 | 3232 | |
d957c0f7 | 3233 | err = nfp_net_check_config(nn, dp, extack); |
ecd63a02 | 3234 | if (err) |
783496b0 | 3235 | goto exit_free_dp; |
164d1e9e | 3236 | |
783496b0 | 3237 | if (!netif_running(dp->netdev)) { |
892a7f70 | 3238 | nfp_net_dp_swap(nn, dp); |
783496b0 JK |
3239 | err = 0; |
3240 | goto exit_free_dp; | |
cc7c0333 JK |
3241 | } |
3242 | ||
cc7c0333 | 3243 | /* Prepare new rings */ |
512e94dc | 3244 | for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) { |
164d1e9e JK |
3245 | err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r); |
3246 | if (err) { | |
512e94dc | 3247 | dp->num_r_vecs = r; |
164d1e9e JK |
3248 | goto err_cleanup_vecs; |
3249 | } | |
3250 | } | |
892a7f70 JK |
3251 | |
3252 | err = nfp_net_rx_rings_prepare(nn, dp); | |
3253 | if (err) | |
3254 | goto err_cleanup_vecs; | |
3255 | ||
3256 | err = nfp_net_tx_rings_prepare(nn, dp); | |
3257 | if (err) | |
3258 | goto err_free_rx; | |
cc7c0333 JK |
3259 | |
3260 | /* Stop device, swap in new rings, try to start the firmware */ | |
3261 | nfp_net_close_stack(nn); | |
3262 | nfp_net_clear_config_and_disable(nn); | |
3263 | ||
892a7f70 | 3264 | err = nfp_net_dp_swap_enable(nn, dp); |
cc7c0333 | 3265 | if (err) { |
68453c7a | 3266 | int err2; |
cc7c0333 | 3267 | |
68453c7a | 3268 | nfp_net_clear_config_and_disable(nn); |
cc7c0333 | 3269 | |
68453c7a | 3270 | /* Try with old configuration and old rings */ |
892a7f70 | 3271 | err2 = nfp_net_dp_swap_enable(nn, dp); |
68453c7a | 3272 | if (err2) |
cc7c0333 | 3273 | nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n", |
68453c7a | 3274 | err, err2); |
cc7c0333 | 3275 | } |
512e94dc | 3276 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 3277 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
cc7c0333 | 3278 | |
892a7f70 JK |
3279 | nfp_net_rx_rings_free(dp); |
3280 | nfp_net_tx_rings_free(dp); | |
cc7c0333 JK |
3281 | |
3282 | nfp_net_open_stack(nn); | |
783496b0 JK |
3283 | exit_free_dp: |
3284 | kfree(dp); | |
cc7c0333 JK |
3285 | |
3286 | return err; | |
68453c7a JK |
3287 | |
3288 | err_free_rx: | |
892a7f70 | 3289 | nfp_net_rx_rings_free(dp); |
164d1e9e | 3290 | err_cleanup_vecs: |
512e94dc | 3291 | for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--) |
164d1e9e | 3292 | nfp_net_cleanup_vector(nn, &nn->r_vecs[r]); |
783496b0 | 3293 | kfree(dp); |
68453c7a JK |
3294 | return err; |
3295 | } | |
3296 | ||
3297 | static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu) | |
3298 | { | |
3299 | struct nfp_net *nn = netdev_priv(netdev); | |
783496b0 | 3300 | struct nfp_net_dp *dp; |
ccbdc596 JK |
3301 | int err; |
3302 | ||
167cebef | 3303 | err = nfp_app_check_mtu(nn->app, netdev, new_mtu); |
ccbdc596 JK |
3304 | if (err) |
3305 | return err; | |
783496b0 JK |
3306 | |
3307 | dp = nfp_net_clone_dp(nn); | |
3308 | if (!dp) | |
3309 | return -ENOMEM; | |
68453c7a | 3310 | |
76e1e1a8 JK |
3311 | dp->mtu = new_mtu; |
3312 | ||
d957c0f7 | 3313 | return nfp_net_ring_reconfig(nn, dp, NULL); |
cc7c0333 JK |
3314 | } |
3315 | ||
b64052fc PC |
3316 | static int |
3317 | nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) | |
3318 | { | |
dd5b2498 | 3319 | const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD; |
b64052fc | 3320 | struct nfp_net *nn = netdev_priv(netdev); |
dd5b2498 | 3321 | int err; |
b64052fc PC |
3322 | |
3323 | /* Priority tagged packets with vlan id 0 are processed by the | |
3324 | * NFP as untagged packets | |
3325 | */ | |
3326 | if (!vid) | |
3327 | return 0; | |
3328 | ||
dd5b2498 JK |
3329 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); |
3330 | if (err) | |
3331 | return err; | |
3332 | ||
527d7d1b JK |
3333 | nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid); |
3334 | nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, | |
3335 | ETH_P_8021Q); | |
b64052fc | 3336 | |
dd5b2498 | 3337 | return nfp_net_mbox_reconfig_and_unlock(nn, cmd); |
b64052fc PC |
3338 | } |
3339 | ||
3340 | static int | |
3341 | nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) | |
3342 | { | |
dd5b2498 | 3343 | const u32 cmd = NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL; |
b64052fc | 3344 | struct nfp_net *nn = netdev_priv(netdev); |
dd5b2498 | 3345 | int err; |
b64052fc PC |
3346 | |
3347 | /* Priority tagged packets with vlan id 0 are processed by the | |
3348 | * NFP as untagged packets | |
3349 | */ | |
3350 | if (!vid) | |
3351 | return 0; | |
3352 | ||
dd5b2498 JK |
3353 | err = nfp_net_mbox_lock(nn, NFP_NET_CFG_VLAN_FILTER_SZ); |
3354 | if (err) | |
3355 | return err; | |
3356 | ||
527d7d1b JK |
3357 | nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid); |
3358 | nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO, | |
3359 | ETH_P_8021Q); | |
b64052fc | 3360 | |
dd5b2498 | 3361 | return nfp_net_mbox_reconfig_and_unlock(nn, cmd); |
b64052fc PC |
3362 | } |
3363 | ||
bc1f4470 | 3364 | static void nfp_net_stat64(struct net_device *netdev, |
3365 | struct rtnl_link_stats64 *stats) | |
4c352362 JK |
3366 | { |
3367 | struct nfp_net *nn = netdev_priv(netdev); | |
3368 | int r; | |
3369 | ||
eca09be8 | 3370 | /* Collect software stats */ |
29f534c4 | 3371 | for (r = 0; r < nn->max_r_vecs; r++) { |
4c352362 JK |
3372 | struct nfp_net_r_vector *r_vec = &nn->r_vecs[r]; |
3373 | u64 data[3]; | |
3374 | unsigned int start; | |
3375 | ||
3376 | do { | |
3377 | start = u64_stats_fetch_begin(&r_vec->rx_sync); | |
3378 | data[0] = r_vec->rx_pkts; | |
3379 | data[1] = r_vec->rx_bytes; | |
3380 | data[2] = r_vec->rx_drops; | |
3381 | } while (u64_stats_fetch_retry(&r_vec->rx_sync, start)); | |
3382 | stats->rx_packets += data[0]; | |
3383 | stats->rx_bytes += data[1]; | |
3384 | stats->rx_dropped += data[2]; | |
3385 | ||
3386 | do { | |
3387 | start = u64_stats_fetch_begin(&r_vec->tx_sync); | |
3388 | data[0] = r_vec->tx_pkts; | |
3389 | data[1] = r_vec->tx_bytes; | |
3390 | data[2] = r_vec->tx_errors; | |
3391 | } while (u64_stats_fetch_retry(&r_vec->tx_sync, start)); | |
3392 | stats->tx_packets += data[0]; | |
3393 | stats->tx_bytes += data[1]; | |
3394 | stats->tx_errors += data[2]; | |
3395 | } | |
eca09be8 JK |
3396 | |
3397 | /* Add in device stats */ | |
3398 | stats->multicast += nn_readq(nn, NFP_NET_CFG_STATS_RX_MC_FRAMES); | |
3399 | stats->rx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_RX_DISCARDS); | |
3400 | stats->rx_errors += nn_readq(nn, NFP_NET_CFG_STATS_RX_ERRORS); | |
3401 | ||
3402 | stats->tx_dropped += nn_readq(nn, NFP_NET_CFG_STATS_TX_DISCARDS); | |
3403 | stats->tx_errors += nn_readq(nn, NFP_NET_CFG_STATS_TX_ERRORS); | |
4c352362 JK |
3404 | } |
3405 | ||
3406 | static int nfp_net_set_features(struct net_device *netdev, | |
3407 | netdev_features_t features) | |
3408 | { | |
3409 | netdev_features_t changed = netdev->features ^ features; | |
3410 | struct nfp_net *nn = netdev_priv(netdev); | |
3411 | u32 new_ctrl; | |
3412 | int err; | |
3413 | ||
3414 | /* Assume this is not called with features we have not advertised */ | |
3415 | ||
79c12a75 | 3416 | new_ctrl = nn->dp.ctrl; |
4c352362 JK |
3417 | |
3418 | if (changed & NETIF_F_RXCSUM) { | |
3419 | if (features & NETIF_F_RXCSUM) | |
ddb98d94 | 3420 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 | 3421 | else |
ddb98d94 | 3422 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
3423 | } |
3424 | ||
3425 | if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { | |
3426 | if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) | |
3427 | new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM; | |
3428 | else | |
3429 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM; | |
3430 | } | |
3431 | ||
3432 | if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) { | |
3433 | if (features & (NETIF_F_TSO | NETIF_F_TSO6)) | |
28063be6 EP |
3434 | new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
3435 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 3436 | else |
28063be6 | 3437 | new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 JK |
3438 | } |
3439 | ||
3440 | if (changed & NETIF_F_HW_VLAN_CTAG_RX) { | |
3441 | if (features & NETIF_F_HW_VLAN_CTAG_RX) | |
3442 | new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN; | |
3443 | else | |
3444 | new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN; | |
3445 | } | |
3446 | ||
3447 | if (changed & NETIF_F_HW_VLAN_CTAG_TX) { | |
3448 | if (features & NETIF_F_HW_VLAN_CTAG_TX) | |
3449 | new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
3450 | else | |
3451 | new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN; | |
3452 | } | |
3453 | ||
b64052fc PC |
3454 | if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { |
3455 | if (features & NETIF_F_HW_VLAN_CTAG_FILTER) | |
3456 | new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3457 | else | |
3458 | new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3459 | } | |
3460 | ||
4c352362 JK |
3461 | if (changed & NETIF_F_SG) { |
3462 | if (features & NETIF_F_SG) | |
3463 | new_ctrl |= NFP_NET_CFG_CTRL_GATHER; | |
3464 | else | |
3465 | new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER; | |
3466 | } | |
3467 | ||
d692403e JK |
3468 | err = nfp_port_set_features(netdev, features); |
3469 | if (err) | |
3470 | return err; | |
7533fdc0 | 3471 | |
4c352362 JK |
3472 | nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n", |
3473 | netdev->features, features, changed); | |
3474 | ||
79c12a75 | 3475 | if (new_ctrl == nn->dp.ctrl) |
4c352362 JK |
3476 | return 0; |
3477 | ||
79c12a75 | 3478 | nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.ctrl, new_ctrl); |
4c352362 JK |
3479 | nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl); |
3480 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN); | |
3481 | if (err) | |
3482 | return err; | |
3483 | ||
79c12a75 | 3484 | nn->dp.ctrl = new_ctrl; |
4c352362 JK |
3485 | |
3486 | return 0; | |
3487 | } | |
3488 | ||
3489 | static netdev_features_t | |
3490 | nfp_net_features_check(struct sk_buff *skb, struct net_device *dev, | |
3491 | netdev_features_t features) | |
3492 | { | |
3493 | u8 l4_hdr; | |
3494 | ||
3495 | /* We can't do TSO over double tagged packets (802.1AD) */ | |
3496 | features &= vlan_features_check(skb, features); | |
3497 | ||
3498 | if (!skb->encapsulation) | |
3499 | return features; | |
3500 | ||
3501 | /* Ensure that inner L4 header offset fits into TX descriptor field */ | |
3502 | if (skb_is_gso(skb)) { | |
3503 | u32 hdrlen; | |
3504 | ||
3505 | hdrlen = skb_inner_transport_header(skb) - skb->data + | |
3506 | inner_tcp_hdrlen(skb); | |
3507 | ||
d7cc8252 JK |
3508 | /* Assume worst case scenario of having longest possible |
3509 | * metadata prepend - 8B | |
3510 | */ | |
3511 | if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ - 8)) | |
4c352362 JK |
3512 | features &= ~NETIF_F_GSO_MASK; |
3513 | } | |
3514 | ||
3515 | /* VXLAN/GRE check */ | |
3516 | switch (vlan_get_protocol(skb)) { | |
3517 | case htons(ETH_P_IP): | |
3518 | l4_hdr = ip_hdr(skb)->protocol; | |
3519 | break; | |
3520 | case htons(ETH_P_IPV6): | |
3521 | l4_hdr = ipv6_hdr(skb)->nexthdr; | |
3522 | break; | |
3523 | default: | |
a188222b | 3524 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
3525 | } |
3526 | ||
3527 | if (skb->inner_protocol_type != ENCAP_TYPE_ETHER || | |
3528 | skb->inner_protocol != htons(ETH_P_TEB) || | |
3529 | (l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) || | |
3530 | (l4_hdr == IPPROTO_UDP && | |
3531 | (skb_inner_mac_header(skb) - skb_transport_header(skb) != | |
3532 | sizeof(struct udphdr) + sizeof(struct vxlanhdr)))) | |
a188222b | 3533 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
4c352362 JK |
3534 | |
3535 | return features; | |
3536 | } | |
3537 | ||
51c1df83 JK |
3538 | static int |
3539 | nfp_net_get_phys_port_name(struct net_device *netdev, char *name, size_t len) | |
3540 | { | |
3541 | struct nfp_net *nn = netdev_priv(netdev); | |
3542 | int n; | |
3543 | ||
f1fa719c JP |
3544 | /* If port is defined, devlink_port is registered and devlink core |
3545 | * is taking care of name formatting. | |
3546 | */ | |
51c1df83 | 3547 | if (nn->port) |
f1fa719c | 3548 | return -EOPNOTSUPP; |
51c1df83 | 3549 | |
fe06a64e | 3550 | if (nn->dp.is_vf || nn->vnic_no_name) |
6fd1cfc0 JK |
3551 | return -EOPNOTSUPP; |
3552 | ||
ca145732 | 3553 | n = snprintf(name, len, "n%d", nn->id); |
6fd1cfc0 JK |
3554 | if (n >= len) |
3555 | return -EINVAL; | |
51c1df83 JK |
3556 | |
3557 | return 0; | |
3558 | } | |
3559 | ||
5f428401 | 3560 | static int nfp_net_xdp_setup_drv(struct nfp_net *nn, struct netdev_bpf *bpf) |
ecd63a02 | 3561 | { |
5f428401 | 3562 | struct bpf_prog *prog = bpf->prog; |
783496b0 | 3563 | struct nfp_net_dp *dp; |
5f428401 JK |
3564 | int err; |
3565 | ||
3566 | if (!xdp_attachment_flags_ok(&nn->xdp, bpf)) | |
3567 | return -EBUSY; | |
ecd63a02 | 3568 | |
6a8ef542 JK |
3569 | if (!prog == !nn->dp.xdp_prog) { |
3570 | WRITE_ONCE(nn->dp.xdp_prog, prog); | |
5f428401 | 3571 | xdp_attachment_setup(&nn->xdp, bpf); |
ecd63a02 JK |
3572 | return 0; |
3573 | } | |
3574 | ||
783496b0 JK |
3575 | dp = nfp_net_clone_dp(nn); |
3576 | if (!dp) | |
3577 | return -ENOMEM; | |
3578 | ||
9dc6b116 | 3579 | dp->xdp_prog = prog; |
892a7f70 | 3580 | dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings; |
c487e6b1 | 3581 | dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE; |
dbf637ff | 3582 | dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0; |
ecd63a02 JK |
3583 | |
3584 | /* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */ | |
5f428401 JK |
3585 | err = nfp_net_ring_reconfig(nn, dp, bpf->extack); |
3586 | if (err) | |
3587 | return err; | |
3588 | ||
3589 | xdp_attachment_setup(&nn->xdp, bpf); | |
3590 | return 0; | |
c443b5ac JK |
3591 | } |
3592 | ||
5f428401 | 3593 | static int nfp_net_xdp_setup_hw(struct nfp_net *nn, struct netdev_bpf *bpf) |
c443b5ac JK |
3594 | { |
3595 | int err; | |
3596 | ||
5f428401 | 3597 | if (!xdp_attachment_flags_ok(&nn->xdp_hw, bpf)) |
9f82fca9 JK |
3598 | return -EBUSY; |
3599 | ||
5f428401 | 3600 | err = nfp_app_xdp_offload(nn->app, nn, bpf->prog, bpf->extack); |
c443b5ac JK |
3601 | if (err) |
3602 | return err; | |
3603 | ||
5f428401 | 3604 | xdp_attachment_setup(&nn->xdp_hw, bpf); |
ecd63a02 JK |
3605 | return 0; |
3606 | } | |
3607 | ||
f4e63525 | 3608 | static int nfp_net_xdp(struct net_device *netdev, struct netdev_bpf *xdp) |
ecd63a02 JK |
3609 | { |
3610 | struct nfp_net *nn = netdev_priv(netdev); | |
3611 | ||
3612 | switch (xdp->command) { | |
3613 | case XDP_SETUP_PROG: | |
5f428401 | 3614 | return nfp_net_xdp_setup_drv(nn, xdp); |
cafa92ac | 3615 | case XDP_SETUP_PROG_HW: |
5f428401 | 3616 | return nfp_net_xdp_setup_hw(nn, xdp); |
ecd63a02 | 3617 | default: |
af93d15a | 3618 | return nfp_app_bpf(nn->app, nn, xdp); |
ecd63a02 JK |
3619 | } |
3620 | } | |
3621 | ||
9d372759 PC |
3622 | static int nfp_net_set_mac_address(struct net_device *netdev, void *addr) |
3623 | { | |
3624 | struct nfp_net *nn = netdev_priv(netdev); | |
3625 | struct sockaddr *saddr = addr; | |
3626 | int err; | |
3627 | ||
3628 | err = eth_prepare_mac_addr_change(netdev, addr); | |
3629 | if (err) | |
3630 | return err; | |
3631 | ||
3632 | nfp_net_write_mac_addr(nn, saddr->sa_data); | |
3633 | ||
3634 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR); | |
3635 | if (err) | |
3636 | return err; | |
3637 | ||
3638 | eth_commit_mac_addr_change(netdev, addr); | |
3639 | ||
3640 | return 0; | |
3641 | } | |
3642 | ||
eb488c26 | 3643 | const struct net_device_ops nfp_net_netdev_ops = { |
4612bebf JK |
3644 | .ndo_init = nfp_app_ndo_init, |
3645 | .ndo_uninit = nfp_app_ndo_uninit, | |
4c352362 JK |
3646 | .ndo_open = nfp_net_netdev_open, |
3647 | .ndo_stop = nfp_net_netdev_close, | |
3648 | .ndo_start_xmit = nfp_net_tx, | |
3649 | .ndo_get_stats64 = nfp_net_stat64, | |
b64052fc PC |
3650 | .ndo_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid, |
3651 | .ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid, | |
25528d90 PC |
3652 | .ndo_set_vf_mac = nfp_app_set_vf_mac, |
3653 | .ndo_set_vf_vlan = nfp_app_set_vf_vlan, | |
3654 | .ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk, | |
4ef6cbe8 | 3655 | .ndo_set_vf_trust = nfp_app_set_vf_trust, |
25528d90 PC |
3656 | .ndo_get_vf_config = nfp_app_get_vf_config, |
3657 | .ndo_set_vf_link_state = nfp_app_set_vf_link_state, | |
8a276873 | 3658 | .ndo_setup_tc = nfp_port_setup_tc, |
4c352362 JK |
3659 | .ndo_tx_timeout = nfp_net_tx_timeout, |
3660 | .ndo_set_rx_mode = nfp_net_set_rx_mode, | |
3661 | .ndo_change_mtu = nfp_net_change_mtu, | |
9d372759 | 3662 | .ndo_set_mac_address = nfp_net_set_mac_address, |
4c352362 JK |
3663 | .ndo_set_features = nfp_net_set_features, |
3664 | .ndo_features_check = nfp_net_features_check, | |
51c1df83 | 3665 | .ndo_get_phys_port_name = nfp_net_get_phys_port_name, |
641ca085 JK |
3666 | .ndo_udp_tunnel_add = udp_tunnel_nic_add_port, |
3667 | .ndo_udp_tunnel_del = udp_tunnel_nic_del_port, | |
f4e63525 | 3668 | .ndo_bpf = nfp_net_xdp, |
5dc37bb9 | 3669 | .ndo_get_devlink_port = nfp_devlink_get_devlink_port, |
4c352362 JK |
3670 | }; |
3671 | ||
641ca085 JK |
3672 | static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table) |
3673 | { | |
3674 | struct nfp_net *nn = netdev_priv(netdev); | |
3675 | int i; | |
3676 | ||
3677 | BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1); | |
3678 | for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2) { | |
3679 | struct udp_tunnel_info ti0, ti1; | |
3680 | ||
3681 | udp_tunnel_nic_get_port(netdev, table, i, &ti0); | |
3682 | udp_tunnel_nic_get_port(netdev, table, i + 1, &ti1); | |
3683 | ||
3684 | nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(ti0.port), | |
3685 | be16_to_cpu(ti1.port) << 16 | be16_to_cpu(ti0.port)); | |
3686 | } | |
3687 | ||
3688 | return nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_VXLAN); | |
3689 | } | |
3690 | ||
3691 | static const struct udp_tunnel_nic_info nfp_udp_tunnels = { | |
3692 | .sync_table = nfp_udp_tunnel_sync, | |
3693 | .flags = UDP_TUNNEL_NIC_INFO_MAY_SLEEP | | |
3694 | UDP_TUNNEL_NIC_INFO_OPEN_ONLY, | |
3695 | .tables = { | |
3696 | { | |
3697 | .n_entries = NFP_NET_N_VXLAN_PORTS, | |
3698 | .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, | |
3699 | }, | |
3700 | }, | |
3701 | }; | |
3702 | ||
4c352362 JK |
3703 | /** |
3704 | * nfp_net_info() - Print general info about the NIC | |
3705 | * @nn: NFP Net device to reconfigure | |
3706 | */ | |
3707 | void nfp_net_info(struct nfp_net *nn) | |
3708 | { | |
416db5c1 | 3709 | nn_info(nn, "Netronome NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n", |
79c12a75 JK |
3710 | nn->dp.is_vf ? "VF " : "", |
3711 | nn->dp.num_tx_rings, nn->max_tx_rings, | |
3712 | nn->dp.num_rx_rings, nn->max_rx_rings); | |
4c352362 JK |
3713 | nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n", |
3714 | nn->fw_ver.resv, nn->fw_ver.class, | |
3715 | nn->fw_ver.major, nn->fw_ver.minor, | |
3716 | nn->max_mtu); | |
31f1a0e3 | 3717 | 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 |
3718 | nn->cap, |
3719 | nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "", | |
3720 | nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "", | |
3721 | nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "", | |
3722 | nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "", | |
3723 | nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "", | |
3724 | nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "", | |
3725 | nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "", | |
3726 | nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "", | |
3727 | nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "", | |
28063be6 EP |
3728 | nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO1 " : "", |
3729 | nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "", | |
611bdd49 EP |
3730 | nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "", |
3731 | nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "", | |
b64052fc | 3732 | nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "", |
4c352362 JK |
3733 | nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "", |
3734 | nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "", | |
3735 | nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "", | |
7533fdc0 | 3736 | nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "", |
ddb98d94 | 3737 | nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ? |
9d372759 | 3738 | "RXCSUM_COMPLETE " : "", |
bb45e51c JK |
3739 | nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "", |
3740 | nfp_app_extra_cap(nn->app, nn)); | |
4c352362 JK |
3741 | } |
3742 | ||
3743 | /** | |
beba69ca | 3744 | * nfp_net_alloc() - Allocate netdev and related structure |
4c352362 | 3745 | * @pdev: PCI device |
e38f5d11 | 3746 | * @ctrl_bar: PCI IOMEM with vNIC config memory |
a7b1ad08 | 3747 | * @needs_netdev: Whether to allocate a netdev for this vNIC |
4c352362 JK |
3748 | * @max_tx_rings: Maximum number of TX rings supported by device |
3749 | * @max_rx_rings: Maximum number of RX rings supported by device | |
3750 | * | |
3751 | * This function allocates a netdev device and fills in the initial | |
a7b1ad08 JK |
3752 | * part of the @struct nfp_net structure. In case of control device |
3753 | * nfp_net structure is allocated without the netdev. | |
4c352362 JK |
3754 | * |
3755 | * Return: NFP Net device structure, or ERR_PTR on error. | |
3756 | */ | |
e38f5d11 JK |
3757 | struct nfp_net * |
3758 | nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev, | |
3759 | unsigned int max_tx_rings, unsigned int max_rx_rings) | |
4c352362 | 3760 | { |
4c352362 | 3761 | struct nfp_net *nn; |
83ec8857 | 3762 | int err; |
4c352362 | 3763 | |
a7b1ad08 JK |
3764 | if (needs_netdev) { |
3765 | struct net_device *netdev; | |
4c352362 | 3766 | |
a7b1ad08 JK |
3767 | netdev = alloc_etherdev_mqs(sizeof(struct nfp_net), |
3768 | max_tx_rings, max_rx_rings); | |
3769 | if (!netdev) | |
3770 | return ERR_PTR(-ENOMEM); | |
3771 | ||
3772 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
3773 | nn = netdev_priv(netdev); | |
3774 | nn->dp.netdev = netdev; | |
3775 | } else { | |
3776 | nn = vzalloc(sizeof(*nn)); | |
3777 | if (!nn) | |
3778 | return ERR_PTR(-ENOMEM); | |
3779 | } | |
4c352362 | 3780 | |
79c12a75 | 3781 | nn->dp.dev = &pdev->dev; |
e38f5d11 | 3782 | nn->dp.ctrl_bar = ctrl_bar; |
4c352362 JK |
3783 | nn->pdev = pdev; |
3784 | ||
3785 | nn->max_tx_rings = max_tx_rings; | |
3786 | nn->max_rx_rings = max_rx_rings; | |
3787 | ||
79c12a75 JK |
3788 | nn->dp.num_tx_rings = min_t(unsigned int, |
3789 | max_tx_rings, num_online_cpus()); | |
3790 | nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings, | |
cbeaf7aa | 3791 | netif_get_num_default_rss_queues()); |
4c352362 | 3792 | |
79c12a75 JK |
3793 | nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings); |
3794 | nn->dp.num_r_vecs = min_t(unsigned int, | |
3795 | nn->dp.num_r_vecs, num_online_cpus()); | |
4b27a1eb | 3796 | |
79c12a75 JK |
3797 | nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT; |
3798 | nn->dp.rxd_cnt = NFP_NET_RX_DESCS_DEFAULT; | |
4c352362 | 3799 | |
3ed77bf7 | 3800 | sema_init(&nn->bar_lock, 1); |
dd5b2498 | 3801 | |
4c352362 JK |
3802 | spin_lock_init(&nn->reconfig_lock); |
3803 | spin_lock_init(&nn->link_status_lock); | |
3804 | ||
3248f77f | 3805 | timer_setup(&nn->reconfig_timer, nfp_net_reconfig_timer, 0); |
3d780b92 | 3806 | |
83ec8857 JK |
3807 | err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar, |
3808 | &nn->tlv_caps); | |
3809 | if (err) | |
3810 | goto err_free_nn; | |
3811 | ||
e2c7114a JK |
3812 | err = nfp_ccm_mbox_alloc(nn); |
3813 | if (err) | |
3814 | goto err_free_nn; | |
3815 | ||
4c352362 | 3816 | return nn; |
83ec8857 JK |
3817 | |
3818 | err_free_nn: | |
3819 | if (nn->dp.netdev) | |
3820 | free_netdev(nn->dp.netdev); | |
3821 | else | |
3822 | vfree(nn); | |
3823 | return ERR_PTR(err); | |
4c352362 JK |
3824 | } |
3825 | ||
3826 | /** | |
beba69ca | 3827 | * nfp_net_free() - Undo what @nfp_net_alloc() did |
4c352362 JK |
3828 | * @nn: NFP Net device to reconfigure |
3829 | */ | |
beba69ca | 3830 | void nfp_net_free(struct nfp_net *nn) |
4c352362 | 3831 | { |
9ad716b9 | 3832 | WARN_ON(timer_pending(&nn->reconfig_timer) || nn->reconfig_posted); |
e2c7114a | 3833 | nfp_ccm_mbox_free(nn); |
dd5b2498 | 3834 | |
a7b1ad08 JK |
3835 | if (nn->dp.netdev) |
3836 | free_netdev(nn->dp.netdev); | |
3837 | else | |
3838 | vfree(nn); | |
4c352362 JK |
3839 | } |
3840 | ||
9ff304bf JK |
3841 | /** |
3842 | * nfp_net_rss_key_sz() - Get current size of the RSS key | |
3843 | * @nn: NFP Net device instance | |
3844 | * | |
3845 | * Return: size of the RSS key for currently selected hash function. | |
3846 | */ | |
3847 | unsigned int nfp_net_rss_key_sz(struct nfp_net *nn) | |
3848 | { | |
3849 | switch (nn->rss_hfunc) { | |
3850 | case ETH_RSS_HASH_TOP: | |
3851 | return NFP_NET_CFG_RSS_KEY_SZ; | |
3852 | case ETH_RSS_HASH_XOR: | |
3853 | return 0; | |
3854 | case ETH_RSS_HASH_CRC32: | |
3855 | return 4; | |
3856 | } | |
3857 | ||
3858 | nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc); | |
3859 | return 0; | |
3860 | } | |
3861 | ||
4c352362 JK |
3862 | /** |
3863 | * nfp_net_rss_init() - Set the initial RSS parameters | |
3864 | * @nn: NFP Net device to reconfigure | |
3865 | */ | |
3866 | static void nfp_net_rss_init(struct nfp_net *nn) | |
3867 | { | |
9ff304bf JK |
3868 | unsigned long func_bit, rss_cap_hfunc; |
3869 | u32 reg; | |
3870 | ||
3871 | /* Read the RSS function capability and select first supported func */ | |
3872 | reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP); | |
3873 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg); | |
3874 | if (!rss_cap_hfunc) | |
3875 | rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, | |
3876 | NFP_NET_CFG_RSS_TOEPLITZ); | |
3877 | ||
3878 | func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS); | |
3879 | if (func_bit == NFP_NET_CFG_RSS_HFUNCS) { | |
79c12a75 | 3880 | dev_warn(nn->dp.dev, |
9ff304bf JK |
3881 | "Bad RSS config, defaulting to Toeplitz hash\n"); |
3882 | func_bit = ETH_RSS_HASH_TOP_BIT; | |
3883 | } | |
3884 | nn->rss_hfunc = 1 << func_bit; | |
3885 | ||
3886 | netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn)); | |
4c352362 | 3887 | |
1e9e10d0 | 3888 | nfp_net_rss_init_itbl(nn); |
4c352362 JK |
3889 | |
3890 | /* Enable IPv4/IPv6 TCP by default */ | |
3891 | nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP | | |
3892 | NFP_NET_CFG_RSS_IPV6_TCP | | |
9ff304bf | 3893 | FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) | |
4c352362 JK |
3894 | NFP_NET_CFG_RSS_MASK; |
3895 | } | |
3896 | ||
3897 | /** | |
3898 | * nfp_net_irqmod_init() - Set the initial IRQ moderation parameters | |
3899 | * @nn: NFP Net device to reconfigure | |
3900 | */ | |
3901 | static void nfp_net_irqmod_init(struct nfp_net *nn) | |
3902 | { | |
3903 | nn->rx_coalesce_usecs = 50; | |
3904 | nn->rx_coalesce_max_frames = 64; | |
3905 | nn->tx_coalesce_usecs = 50; | |
3906 | nn->tx_coalesce_max_frames = 64; | |
3907 | } | |
3908 | ||
a7b1ad08 | 3909 | static void nfp_net_netdev_init(struct nfp_net *nn) |
4c352362 | 3910 | { |
beba69ca | 3911 | struct net_device *netdev = nn->dp.netdev; |
611bdd49 | 3912 | |
9d372759 | 3913 | nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr); |
4c352362 | 3914 | |
a7b1ad08 | 3915 | netdev->mtu = nn->dp.mtu; |
4c352362 JK |
3916 | |
3917 | /* Advertise/enable offloads based on capabilities | |
3918 | * | |
3919 | * Note: netdev->features show the currently enabled features | |
3920 | * and netdev->hw_features advertises which features are | |
3921 | * supported. By default we enable most features. | |
3922 | */ | |
9d372759 PC |
3923 | if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR) |
3924 | netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE; | |
3925 | ||
4c352362 | 3926 | netdev->hw_features = NETIF_F_HIGHDMA; |
ddb98d94 | 3927 | if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) { |
4c352362 | 3928 | netdev->hw_features |= NETIF_F_RXCSUM; |
ddb98d94 | 3929 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY; |
4c352362 JK |
3930 | } |
3931 | if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) { | |
3932 | netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; | |
79c12a75 | 3933 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM; |
4c352362 JK |
3934 | } |
3935 | if (nn->cap & NFP_NET_CFG_CTRL_GATHER) { | |
3936 | netdev->hw_features |= NETIF_F_SG; | |
79c12a75 | 3937 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER; |
4c352362 | 3938 | } |
28063be6 EP |
3939 | if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) || |
3940 | nn->cap & NFP_NET_CFG_CTRL_LSO2) { | |
4c352362 | 3941 | netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6; |
28063be6 EP |
3942 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?: |
3943 | NFP_NET_CFG_CTRL_LSO; | |
4c352362 | 3944 | } |
a7b1ad08 | 3945 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) |
4c352362 | 3946 | netdev->hw_features |= NETIF_F_RXHASH; |
7848418e | 3947 | if (nn->cap & NFP_NET_CFG_CTRL_VXLAN) { |
4c352362 | 3948 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) |
7848418e | 3949 | netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL; |
641ca085 | 3950 | netdev->udp_tunnel_nic_info = &nfp_udp_tunnels; |
7848418e | 3951 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_VXLAN; |
4c352362 | 3952 | } |
7848418e JK |
3953 | if (nn->cap & NFP_NET_CFG_CTRL_NVGRE) { |
3954 | if (nn->cap & NFP_NET_CFG_CTRL_LSO) | |
3955 | netdev->hw_features |= NETIF_F_GSO_GRE; | |
3956 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_NVGRE; | |
3957 | } | |
3958 | if (nn->cap & (NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE)) | |
3959 | netdev->hw_enc_features = netdev->hw_features; | |
4c352362 JK |
3960 | |
3961 | netdev->vlan_features = netdev->hw_features; | |
3962 | ||
3963 | if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) { | |
3964 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; | |
79c12a75 | 3965 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN; |
4c352362 JK |
3966 | } |
3967 | if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) { | |
28063be6 EP |
3968 | if (nn->cap & NFP_NET_CFG_CTRL_LSO2) { |
3969 | nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n"); | |
3970 | } else { | |
3971 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX; | |
3972 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN; | |
3973 | } | |
4c352362 | 3974 | } |
b64052fc PC |
3975 | if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) { |
3976 | netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER; | |
3977 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER; | |
3978 | } | |
4c352362 JK |
3979 | |
3980 | netdev->features = netdev->hw_features; | |
3981 | ||
0b9de4ca | 3982 | if (nfp_app_has_tc(nn->app) && nn->port) |
7533fdc0 JK |
3983 | netdev->hw_features |= NETIF_F_HW_TC; |
3984 | ||
4c352362 JK |
3985 | /* Advertise but disable TSO by default. */ |
3986 | netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6); | |
28063be6 | 3987 | nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY; |
4c352362 | 3988 | |
a7b1ad08 JK |
3989 | /* Finalise the netdev setup */ |
3990 | netdev->netdev_ops = &nfp_net_netdev_ops; | |
3991 | netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000); | |
3992 | ||
3993 | /* MTU range: 68 - hw-specific max */ | |
3994 | netdev->min_mtu = ETH_MIN_MTU; | |
3995 | netdev->max_mtu = nn->max_mtu; | |
3996 | ||
0d592e52 JK |
3997 | netdev->gso_max_segs = NFP_NET_LSO_MAX_SEGS; |
3998 | ||
a7b1ad08 JK |
3999 | netif_carrier_off(netdev); |
4000 | ||
4001 | nfp_net_set_ethtool_ops(netdev); | |
4002 | } | |
4003 | ||
545bfa7a | 4004 | static int nfp_net_read_caps(struct nfp_net *nn) |
a7b1ad08 | 4005 | { |
a7b1ad08 JK |
4006 | /* Get some of the read-only fields from the BAR */ |
4007 | nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); | |
4008 | nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); | |
4009 | ||
64a919a9 JK |
4010 | /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases |
4011 | * we allow use of non-chained metadata if RSS(v1) is the only | |
4012 | * advertised capability requiring metadata. | |
4013 | */ | |
a7b1ad08 | 4014 | nn->dp.chained_metadata_format = nn->fw_ver.major == 4 || |
77ece8d5 | 4015 | !nn->dp.netdev || |
64a919a9 | 4016 | !(nn->cap & NFP_NET_CFG_CTRL_RSS) || |
a7b1ad08 | 4017 | nn->cap & NFP_NET_CFG_CTRL_CHAIN_META; |
64a919a9 JK |
4018 | /* RSS(v1) uses non-chained metadata format, except in ABI 4.x where |
4019 | * it has the same meaning as RSSv2. | |
4020 | */ | |
a7b1ad08 JK |
4021 | if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4) |
4022 | nn->cap &= ~NFP_NET_CFG_CTRL_RSS; | |
4023 | ||
4024 | /* Determine RX packet/metadata boundary offset */ | |
4025 | if (nn->fw_ver.major >= 2) { | |
4026 | u32 reg; | |
4027 | ||
4028 | reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET); | |
4029 | if (reg > NFP_NET_MAX_PREPEND) { | |
4030 | nn_err(nn, "Invalid rx offset: %d\n", reg); | |
4031 | return -EINVAL; | |
4032 | } | |
4033 | nn->dp.rx_offset = reg; | |
4034 | } else { | |
4035 | nn->dp.rx_offset = NFP_NET_RX_OFFSET; | |
4036 | } | |
4037 | ||
78a0a65f JK |
4038 | /* For control vNICs mask out the capabilities app doesn't want. */ |
4039 | if (!nn->dp.netdev) | |
4040 | nn->cap &= nn->app->type->ctrl_cap_mask; | |
4041 | ||
545bfa7a JK |
4042 | return 0; |
4043 | } | |
4044 | ||
4045 | /** | |
4046 | * nfp_net_init() - Initialise/finalise the nfp_net structure | |
4047 | * @nn: NFP Net device structure | |
4048 | * | |
4049 | * Return: 0 on success or negative errno on error. | |
4050 | */ | |
4051 | int nfp_net_init(struct nfp_net *nn) | |
4052 | { | |
4053 | int err; | |
4054 | ||
4055 | nn->dp.rx_dma_dir = DMA_FROM_DEVICE; | |
4056 | ||
4057 | err = nfp_net_read_caps(nn); | |
4058 | if (err) | |
4059 | return err; | |
4060 | ||
a7b1ad08 | 4061 | /* Set default MTU and Freelist buffer size */ |
9bbdd41b | 4062 | if (!nfp_net_is_data_vnic(nn) && nn->app->ctrl_mtu) { |
bc2796db | 4063 | nn->dp.mtu = min(nn->app->ctrl_mtu, nn->max_mtu); |
9bbdd41b | 4064 | } else if (nn->max_mtu < NFP_NET_DEFAULT_MTU) { |
a7b1ad08 | 4065 | nn->dp.mtu = nn->max_mtu; |
9bbdd41b | 4066 | } else { |
a7b1ad08 | 4067 | nn->dp.mtu = NFP_NET_DEFAULT_MTU; |
9bbdd41b | 4068 | } |
a7b1ad08 JK |
4069 | nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp); |
4070 | ||
79ca38e8 JK |
4071 | if (nfp_app_ctrl_uses_data_vnics(nn->app)) |
4072 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_CMSG_DATA; | |
4073 | ||
a7b1ad08 JK |
4074 | if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) { |
4075 | nfp_net_rss_init(nn); | |
4076 | nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?: | |
4077 | NFP_NET_CFG_CTRL_RSS; | |
4078 | } | |
4079 | ||
4c352362 JK |
4080 | /* Allow L2 Broadcast and Multicast through by default, if supported */ |
4081 | if (nn->cap & NFP_NET_CFG_CTRL_L2BC) | |
79c12a75 | 4082 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC; |
4c352362 JK |
4083 | |
4084 | /* Allow IRQ moderation, if supported */ | |
4085 | if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) { | |
4086 | nfp_net_irqmod_init(nn); | |
79c12a75 | 4087 | nn->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD; |
4c352362 JK |
4088 | } |
4089 | ||
4c352362 JK |
4090 | /* Stash the re-configuration queue away. First odd queue in TX Bar */ |
4091 | nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ; | |
4092 | ||
4093 | /* Make sure the FW knows the netdev is supposed to be disabled here */ | |
4094 | nn_writel(nn, NFP_NET_CFG_CTRL, 0); | |
4095 | nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0); | |
4096 | nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0); | |
4097 | err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING | | |
4098 | NFP_NET_CFG_UPDATE_GEN); | |
4099 | if (err) | |
4100 | return err; | |
4101 | ||
232eeb1f | 4102 | if (nn->dp.netdev) { |
0a72d833 JK |
4103 | nfp_net_netdev_init(nn); |
4104 | ||
e2c7114a | 4105 | err = nfp_ccm_mbox_init(nn); |
232eeb1f JK |
4106 | if (err) |
4107 | return err; | |
e2c7114a JK |
4108 | |
4109 | err = nfp_net_tls_init(nn); | |
4110 | if (err) | |
4111 | goto err_clean_mbox; | |
232eeb1f JK |
4112 | } |
4113 | ||
beba69ca | 4114 | nfp_net_vecs_init(nn); |
4c352362 | 4115 | |
a7b1ad08 JK |
4116 | if (!nn->dp.netdev) |
4117 | return 0; | |
4118 | return register_netdev(nn->dp.netdev); | |
e2c7114a JK |
4119 | |
4120 | err_clean_mbox: | |
4121 | nfp_ccm_mbox_clean(nn); | |
4122 | return err; | |
4c352362 JK |
4123 | } |
4124 | ||
4125 | /** | |
beba69ca JK |
4126 | * nfp_net_clean() - Undo what nfp_net_init() did. |
4127 | * @nn: NFP Net device structure | |
4c352362 | 4128 | */ |
beba69ca | 4129 | void nfp_net_clean(struct nfp_net *nn) |
4c352362 | 4130 | { |
a7b1ad08 JK |
4131 | if (!nn->dp.netdev) |
4132 | return; | |
4133 | ||
6f14f443 | 4134 | unregister_netdev(nn->dp.netdev); |
e2c7114a | 4135 | nfp_ccm_mbox_clean(nn); |
9ad716b9 | 4136 | nfp_net_reconfig_wait_posted(nn); |
4c352362 | 4137 | } |