1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (c) 2019, Intel Corporation. */ |
3 | |
4 | #include <linux/filter.h> |
5 | |
6 | #include "ice_txrx_lib.h" |
7 | #include "ice_eswitch.h" |
8 | #include "ice_lib.h" |
9 | |
10 | /** |
11 | * ice_release_rx_desc - Store the new tail and head values |
12 | * @rx_ring: ring to bump |
13 | * @val: new head index |
14 | */ |
15 | void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val) |
16 | { |
17 | u16 prev_ntu = rx_ring->next_to_use & ~0x7; |
18 | |
19 | rx_ring->next_to_use = val; |
20 | |
21 | /* update next to alloc since we have filled the ring */ |
22 | rx_ring->next_to_alloc = val; |
23 | |
24 | /* QRX_TAIL will be updated with any tail value, but hardware ignores |
25 | * the lower 3 bits. This makes it so we only bump tail on meaningful |
26 | * boundaries. Also, this allows us to bump tail on intervals of 8 up to |
27 | * the budget depending on the current traffic load. |
28 | */ |
29 | val &= ~0x7; |
30 | if (prev_ntu != val) { |
31 | /* Force memory writes to complete before letting h/w |
32 | * know there are new descriptors to fetch. (Only |
33 | * applicable for weak-ordered memory model archs, |
34 | * such as IA-64). |
35 | */ |
36 | wmb(); |
37 | writel(val, addr: rx_ring->tail); |
38 | } |
39 | } |
40 | |
41 | /** |
42 | * ice_ptype_to_htype - get a hash type |
43 | * @ptype: the ptype value from the descriptor |
44 | * |
45 | * Returns appropriate hash type (such as PKT_HASH_TYPE_L2/L3/L4) to be used by |
46 | * skb_set_hash based on PTYPE as parsed by HW Rx pipeline and is part of |
47 | * Rx desc. |
48 | */ |
49 | static enum pkt_hash_types ice_ptype_to_htype(u16 ptype) |
50 | { |
51 | struct ice_rx_ptype_decoded decoded = ice_decode_rx_desc_ptype(ptype); |
52 | |
53 | if (!decoded.known) |
54 | return PKT_HASH_TYPE_NONE; |
55 | if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY4) |
56 | return PKT_HASH_TYPE_L4; |
57 | if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY3) |
58 | return PKT_HASH_TYPE_L3; |
59 | if (decoded.outer_ip == ICE_RX_PTYPE_OUTER_L2) |
60 | return PKT_HASH_TYPE_L2; |
61 | |
62 | return PKT_HASH_TYPE_NONE; |
63 | } |
64 | |
65 | /** |
66 | * ice_get_rx_hash - get RX hash value from descriptor |
67 | * @rx_desc: specific descriptor |
68 | * |
69 | * Returns hash, if present, 0 otherwise. |
70 | */ |
71 | static u32 ice_get_rx_hash(const union ice_32b_rx_flex_desc *rx_desc) |
72 | { |
73 | const struct ice_32b_rx_flex_desc_nic *nic_mdid; |
74 | |
75 | if (unlikely(rx_desc->wb.rxdid != ICE_RXDID_FLEX_NIC)) |
76 | return 0; |
77 | |
78 | nic_mdid = (struct ice_32b_rx_flex_desc_nic *)rx_desc; |
79 | return le32_to_cpu(nic_mdid->rss_hash); |
80 | } |
81 | |
82 | /** |
83 | * ice_rx_hash_to_skb - set the hash value in the skb |
84 | * @rx_ring: descriptor ring |
85 | * @rx_desc: specific descriptor |
86 | * @skb: pointer to current skb |
87 | * @rx_ptype: the ptype value from the descriptor |
88 | */ |
89 | static void |
90 | ice_rx_hash_to_skb(const struct ice_rx_ring *rx_ring, |
91 | const union ice_32b_rx_flex_desc *rx_desc, |
92 | struct sk_buff *skb, u16 rx_ptype) |
93 | { |
94 | u32 hash; |
95 | |
96 | if (!(rx_ring->netdev->features & NETIF_F_RXHASH)) |
97 | return; |
98 | |
99 | hash = ice_get_rx_hash(rx_desc); |
100 | if (likely(hash)) |
101 | skb_set_hash(skb, hash, type: ice_ptype_to_htype(ptype: rx_ptype)); |
102 | } |
103 | |
104 | /** |
105 | * ice_rx_csum - Indicate in skb if checksum is good |
106 | * @ring: the ring we care about |
107 | * @skb: skb currently being received and modified |
108 | * @rx_desc: the receive descriptor |
109 | * @ptype: the packet type decoded by hardware |
110 | * |
111 | * skb->protocol must be set before this function is called |
112 | */ |
113 | static void |
114 | ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb, |
115 | union ice_32b_rx_flex_desc *rx_desc, u16 ptype) |
116 | { |
117 | struct ice_rx_ptype_decoded decoded; |
118 | u16 rx_status0, rx_status1; |
119 | bool ipv4, ipv6; |
120 | |
121 | rx_status0 = le16_to_cpu(rx_desc->wb.status_error0); |
122 | rx_status1 = le16_to_cpu(rx_desc->wb.status_error1); |
123 | |
124 | decoded = ice_decode_rx_desc_ptype(ptype); |
125 | |
126 | /* Start with CHECKSUM_NONE and by default csum_level = 0 */ |
127 | skb->ip_summed = CHECKSUM_NONE; |
128 | skb_checksum_none_assert(skb); |
129 | |
130 | /* check if Rx checksum is enabled */ |
131 | if (!(ring->netdev->features & NETIF_F_RXCSUM)) |
132 | return; |
133 | |
134 | /* check if HW has decoded the packet and checksum */ |
135 | if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S))) |
136 | return; |
137 | |
138 | if (!(decoded.known && decoded.outer_ip)) |
139 | return; |
140 | |
141 | ipv4 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) && |
142 | (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV4); |
143 | ipv6 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) && |
144 | (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV6); |
145 | |
146 | if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S)))) { |
147 | ring->vsi->back->hw_rx_eipe_error++; |
148 | return; |
149 | } |
150 | |
151 | if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S)))) |
152 | goto checksum_fail; |
153 | |
154 | if (ipv6 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S)))) |
155 | goto checksum_fail; |
156 | |
157 | /* check for L4 errors and handle packets that were not able to be |
158 | * checksummed due to arrival speed |
159 | */ |
160 | if (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_L4E_S)) |
161 | goto checksum_fail; |
162 | |
163 | /* check for outer UDP checksum error in tunneled packets */ |
164 | if ((rx_status1 & BIT(ICE_RX_FLEX_DESC_STATUS1_NAT_S)) && |
165 | (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EUDPE_S))) |
166 | goto checksum_fail; |
167 | |
168 | /* If there is an outer header present that might contain a checksum |
169 | * we need to bump the checksum level by 1 to reflect the fact that |
170 | * we are indicating we validated the inner checksum. |
171 | */ |
172 | if (decoded.tunnel_type >= ICE_RX_PTYPE_TUNNEL_IP_GRENAT) |
173 | skb->csum_level = 1; |
174 | |
175 | /* Only report checksum unnecessary for TCP, UDP, or SCTP */ |
176 | switch (decoded.inner_prot) { |
177 | case ICE_RX_PTYPE_INNER_PROT_TCP: |
178 | case ICE_RX_PTYPE_INNER_PROT_UDP: |
179 | case ICE_RX_PTYPE_INNER_PROT_SCTP: |
180 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
181 | break; |
182 | default: |
183 | break; |
184 | } |
185 | return; |
186 | |
187 | checksum_fail: |
188 | ring->vsi->back->hw_csum_rx_error++; |
189 | } |
190 | |
191 | /** |
192 | * ice_ptp_rx_hwts_to_skb - Put RX timestamp into skb |
193 | * @rx_ring: Ring to get the VSI info |
194 | * @rx_desc: Receive descriptor |
195 | * @skb: Particular skb to send timestamp with |
196 | * |
197 | * The timestamp is in ns, so we must convert the result first. |
198 | */ |
199 | static void |
200 | ice_ptp_rx_hwts_to_skb(struct ice_rx_ring *rx_ring, |
201 | const union ice_32b_rx_flex_desc *rx_desc, |
202 | struct sk_buff *skb) |
203 | { |
204 | u64 ts_ns = ice_ptp_get_rx_hwts(rx_desc, pkt_ctx: &rx_ring->pkt_ctx); |
205 | |
206 | skb_hwtstamps(skb)->hwtstamp = ns_to_ktime(ns: ts_ns); |
207 | } |
208 | |
209 | /** |
210 | * ice_get_ptype - Read HW packet type from the descriptor |
211 | * @rx_desc: RX descriptor |
212 | */ |
213 | static u16 ice_get_ptype(const union ice_32b_rx_flex_desc *rx_desc) |
214 | { |
215 | return le16_to_cpu(rx_desc->wb.ptype_flex_flags0) & |
216 | ICE_RX_FLEX_DESC_PTYPE_M; |
217 | } |
218 | |
219 | /** |
220 | * ice_process_skb_fields - Populate skb header fields from Rx descriptor |
221 | * @rx_ring: Rx descriptor ring packet is being transacted on |
222 | * @rx_desc: pointer to the EOP Rx descriptor |
223 | * @skb: pointer to current skb being populated |
224 | * |
225 | * This function checks the ring, descriptor, and packet information in |
226 | * order to populate the hash, checksum, VLAN, protocol, and |
227 | * other fields within the skb. |
228 | */ |
229 | void |
230 | ice_process_skb_fields(struct ice_rx_ring *rx_ring, |
231 | union ice_32b_rx_flex_desc *rx_desc, |
232 | struct sk_buff *skb) |
233 | { |
234 | u16 ptype = ice_get_ptype(rx_desc); |
235 | |
236 | ice_rx_hash_to_skb(rx_ring, rx_desc, skb, rx_ptype: ptype); |
237 | |
238 | /* modifies the skb - consumes the enet header */ |
239 | skb->protocol = eth_type_trans(skb, dev: rx_ring->netdev); |
240 | |
241 | ice_rx_csum(ring: rx_ring, skb, rx_desc, ptype); |
242 | |
243 | if (rx_ring->ptp_rx) |
244 | ice_ptp_rx_hwts_to_skb(rx_ring, rx_desc, skb); |
245 | } |
246 | |
247 | /** |
248 | * ice_receive_skb - Send a completed packet up the stack |
249 | * @rx_ring: Rx ring in play |
250 | * @skb: packet to send up |
251 | * @vlan_tci: VLAN TCI for packet |
252 | * |
253 | * This function sends the completed packet (via. skb) up the stack using |
254 | * gro receive functions (with/without VLAN tag) |
255 | */ |
256 | void |
257 | ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tci) |
258 | { |
259 | if ((vlan_tci & VLAN_VID_MASK) && rx_ring->vlan_proto) |
260 | __vlan_hwaccel_put_tag(skb, vlan_proto: rx_ring->vlan_proto, |
261 | vlan_tci); |
262 | |
263 | napi_gro_receive(napi: &rx_ring->q_vector->napi, skb); |
264 | } |
265 | |
266 | /** |
267 | * ice_clean_xdp_tx_buf - Free and unmap XDP Tx buffer |
268 | * @dev: device for DMA mapping |
269 | * @tx_buf: Tx buffer to clean |
270 | * @bq: XDP bulk flush struct |
271 | */ |
272 | static void |
273 | ice_clean_xdp_tx_buf(struct device *dev, struct ice_tx_buf *tx_buf, |
274 | struct xdp_frame_bulk *bq) |
275 | { |
276 | dma_unmap_single(dev, dma_unmap_addr(tx_buf, dma), |
277 | dma_unmap_len(tx_buf, len), DMA_TO_DEVICE); |
278 | dma_unmap_len_set(tx_buf, len, 0); |
279 | |
280 | switch (tx_buf->type) { |
281 | case ICE_TX_BUF_XDP_TX: |
282 | page_frag_free(addr: tx_buf->raw_buf); |
283 | break; |
284 | case ICE_TX_BUF_XDP_XMIT: |
285 | xdp_return_frame_bulk(xdpf: tx_buf->xdpf, bq); |
286 | break; |
287 | } |
288 | |
289 | tx_buf->type = ICE_TX_BUF_EMPTY; |
290 | } |
291 | |
292 | /** |
293 | * ice_clean_xdp_irq - Reclaim resources after transmit completes on XDP ring |
294 | * @xdp_ring: XDP ring to clean |
295 | */ |
296 | static u32 ice_clean_xdp_irq(struct ice_tx_ring *xdp_ring) |
297 | { |
298 | int total_bytes = 0, total_pkts = 0; |
299 | struct device *dev = xdp_ring->dev; |
300 | u32 ntc = xdp_ring->next_to_clean; |
301 | struct ice_tx_desc *tx_desc; |
302 | u32 cnt = xdp_ring->count; |
303 | struct xdp_frame_bulk bq; |
304 | u32 frags, xdp_tx = 0; |
305 | u32 ready_frames = 0; |
306 | u32 idx; |
307 | u32 ret; |
308 | |
309 | idx = xdp_ring->tx_buf[ntc].rs_idx; |
310 | tx_desc = ICE_TX_DESC(xdp_ring, idx); |
311 | if (tx_desc->cmd_type_offset_bsz & |
312 | cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)) { |
313 | if (idx >= ntc) |
314 | ready_frames = idx - ntc + 1; |
315 | else |
316 | ready_frames = idx + cnt - ntc + 1; |
317 | } |
318 | |
319 | if (unlikely(!ready_frames)) |
320 | return 0; |
321 | ret = ready_frames; |
322 | |
323 | xdp_frame_bulk_init(bq: &bq); |
324 | rcu_read_lock(); /* xdp_return_frame_bulk() */ |
325 | |
326 | while (ready_frames) { |
327 | struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc]; |
328 | struct ice_tx_buf *head = tx_buf; |
329 | |
330 | /* bytecount holds size of head + frags */ |
331 | total_bytes += tx_buf->bytecount; |
332 | frags = tx_buf->nr_frags; |
333 | total_pkts++; |
334 | /* count head + frags */ |
335 | ready_frames -= frags + 1; |
336 | xdp_tx++; |
337 | |
338 | ntc++; |
339 | if (ntc == cnt) |
340 | ntc = 0; |
341 | |
342 | for (int i = 0; i < frags; i++) { |
343 | tx_buf = &xdp_ring->tx_buf[ntc]; |
344 | |
345 | ice_clean_xdp_tx_buf(dev, tx_buf, bq: &bq); |
346 | ntc++; |
347 | if (ntc == cnt) |
348 | ntc = 0; |
349 | } |
350 | |
351 | ice_clean_xdp_tx_buf(dev, tx_buf: head, bq: &bq); |
352 | } |
353 | |
354 | xdp_flush_frame_bulk(bq: &bq); |
355 | rcu_read_unlock(); |
356 | |
357 | tx_desc->cmd_type_offset_bsz = 0; |
358 | xdp_ring->next_to_clean = ntc; |
359 | xdp_ring->xdp_tx_active -= xdp_tx; |
360 | ice_update_tx_ring_stats(ring: xdp_ring, pkts: total_pkts, bytes: total_bytes); |
361 | |
362 | return ret; |
363 | } |
364 | |
365 | /** |
366 | * __ice_xmit_xdp_ring - submit frame to XDP ring for transmission |
367 | * @xdp: XDP buffer to be placed onto Tx descriptors |
368 | * @xdp_ring: XDP ring for transmission |
369 | * @frame: whether this comes from .ndo_xdp_xmit() |
370 | */ |
371 | int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring, |
372 | bool frame) |
373 | { |
374 | struct skb_shared_info *sinfo = NULL; |
375 | u32 size = xdp->data_end - xdp->data; |
376 | struct device *dev = xdp_ring->dev; |
377 | u32 ntu = xdp_ring->next_to_use; |
378 | struct ice_tx_desc *tx_desc; |
379 | struct ice_tx_buf *tx_head; |
380 | struct ice_tx_buf *tx_buf; |
381 | u32 cnt = xdp_ring->count; |
382 | void *data = xdp->data; |
383 | u32 nr_frags = 0; |
384 | u32 free_space; |
385 | u32 frag = 0; |
386 | |
387 | free_space = ICE_DESC_UNUSED(xdp_ring); |
388 | if (free_space < ICE_RING_QUARTER(xdp_ring)) |
389 | free_space += ice_clean_xdp_irq(xdp_ring); |
390 | |
391 | if (unlikely(!free_space)) |
392 | goto busy; |
393 | |
394 | if (unlikely(xdp_buff_has_frags(xdp))) { |
395 | sinfo = xdp_get_shared_info_from_buff(xdp); |
396 | nr_frags = sinfo->nr_frags; |
397 | if (free_space < nr_frags + 1) |
398 | goto busy; |
399 | } |
400 | |
401 | tx_desc = ICE_TX_DESC(xdp_ring, ntu); |
402 | tx_head = &xdp_ring->tx_buf[ntu]; |
403 | tx_buf = tx_head; |
404 | |
405 | for (;;) { |
406 | dma_addr_t dma; |
407 | |
408 | dma = dma_map_single(dev, data, size, DMA_TO_DEVICE); |
409 | if (dma_mapping_error(dev, dma_addr: dma)) |
410 | goto dma_unmap; |
411 | |
412 | /* record length, and DMA address */ |
413 | dma_unmap_len_set(tx_buf, len, size); |
414 | dma_unmap_addr_set(tx_buf, dma, dma); |
415 | |
416 | if (frame) { |
417 | tx_buf->type = ICE_TX_BUF_FRAG; |
418 | } else { |
419 | tx_buf->type = ICE_TX_BUF_XDP_TX; |
420 | tx_buf->raw_buf = data; |
421 | } |
422 | |
423 | tx_desc->buf_addr = cpu_to_le64(dma); |
424 | tx_desc->cmd_type_offset_bsz = ice_build_ctob(td_cmd: 0, td_offset: 0, size, td_tag: 0); |
425 | |
426 | ntu++; |
427 | if (ntu == cnt) |
428 | ntu = 0; |
429 | |
430 | if (frag == nr_frags) |
431 | break; |
432 | |
433 | tx_desc = ICE_TX_DESC(xdp_ring, ntu); |
434 | tx_buf = &xdp_ring->tx_buf[ntu]; |
435 | |
436 | data = skb_frag_address(frag: &sinfo->frags[frag]); |
437 | size = skb_frag_size(frag: &sinfo->frags[frag]); |
438 | frag++; |
439 | } |
440 | |
441 | /* store info about bytecount and frag count in first desc */ |
442 | tx_head->bytecount = xdp_get_buff_len(xdp); |
443 | tx_head->nr_frags = nr_frags; |
444 | |
445 | if (frame) { |
446 | tx_head->type = ICE_TX_BUF_XDP_XMIT; |
447 | tx_head->xdpf = xdp->data_hard_start; |
448 | } |
449 | |
450 | /* update last descriptor from a frame with EOP */ |
451 | tx_desc->cmd_type_offset_bsz |= |
452 | cpu_to_le64(ICE_TX_DESC_CMD_EOP << ICE_TXD_QW1_CMD_S); |
453 | |
454 | xdp_ring->xdp_tx_active++; |
455 | xdp_ring->next_to_use = ntu; |
456 | |
457 | return ICE_XDP_TX; |
458 | |
459 | dma_unmap: |
460 | for (;;) { |
461 | tx_buf = &xdp_ring->tx_buf[ntu]; |
462 | dma_unmap_page(dev, dma_unmap_addr(tx_buf, dma), |
463 | dma_unmap_len(tx_buf, len), DMA_TO_DEVICE); |
464 | dma_unmap_len_set(tx_buf, len, 0); |
465 | if (tx_buf == tx_head) |
466 | break; |
467 | |
468 | if (!ntu) |
469 | ntu += cnt; |
470 | ntu--; |
471 | } |
472 | return ICE_XDP_CONSUMED; |
473 | |
474 | busy: |
475 | xdp_ring->ring_stats->tx_stats.tx_busy++; |
476 | |
477 | return ICE_XDP_CONSUMED; |
478 | } |
479 | |
480 | /** |
481 | * ice_finalize_xdp_rx - Bump XDP Tx tail and/or flush redirect map |
482 | * @xdp_ring: XDP ring |
483 | * @xdp_res: Result of the receive batch |
484 | * @first_idx: index to write from caller |
485 | * |
486 | * This function bumps XDP Tx tail and/or flush redirect map, and |
487 | * should be called when a batch of packets has been processed in the |
488 | * napi loop. |
489 | */ |
490 | void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res, |
491 | u32 first_idx) |
492 | { |
493 | struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[first_idx]; |
494 | |
495 | if (xdp_res & ICE_XDP_REDIR) |
496 | xdp_do_flush(); |
497 | |
498 | if (xdp_res & ICE_XDP_TX) { |
499 | if (static_branch_unlikely(&ice_xdp_locking_key)) |
500 | spin_lock(lock: &xdp_ring->tx_lock); |
501 | /* store index of descriptor with RS bit set in the first |
502 | * ice_tx_buf of given NAPI batch |
503 | */ |
504 | tx_buf->rs_idx = ice_set_rs_bit(xdp_ring); |
505 | ice_xdp_ring_update_tail(xdp_ring); |
506 | if (static_branch_unlikely(&ice_xdp_locking_key)) |
507 | spin_unlock(lock: &xdp_ring->tx_lock); |
508 | } |
509 | } |
510 | |
511 | /** |
512 | * ice_xdp_rx_hw_ts - HW timestamp XDP hint handler |
513 | * @ctx: XDP buff pointer |
514 | * @ts_ns: destination address |
515 | * |
516 | * Copy HW timestamp (if available) to the destination address. |
517 | */ |
518 | static int ice_xdp_rx_hw_ts(const struct xdp_md *ctx, u64 *ts_ns) |
519 | { |
520 | const struct ice_xdp_buff *xdp_ext = (void *)ctx; |
521 | |
522 | *ts_ns = ice_ptp_get_rx_hwts(rx_desc: xdp_ext->eop_desc, |
523 | pkt_ctx: xdp_ext->pkt_ctx); |
524 | if (!*ts_ns) |
525 | return -ENODATA; |
526 | |
527 | return 0; |
528 | } |
529 | |
530 | /* Define a ptype index -> XDP hash type lookup table. |
531 | * It uses the same ptype definitions as ice_decode_rx_desc_ptype[], |
532 | * avoiding possible copy-paste errors. |
533 | */ |
534 | #undef ICE_PTT |
535 | #undef ICE_PTT_UNUSED_ENTRY |
536 | |
537 | #define ICE_PTT(PTYPE, OUTER_IP, OUTER_IP_VER, OUTER_FRAG, T, TE, TEF, I, PL)\ |
538 | [PTYPE] = XDP_RSS_L3_##OUTER_IP_VER | XDP_RSS_L4_##I | XDP_RSS_TYPE_##PL |
539 | |
540 | #define ICE_PTT_UNUSED_ENTRY(PTYPE) [PTYPE] = 0 |
541 | |
542 | /* A few supplementary definitions for when XDP hash types do not coincide |
543 | * with what can be generated from ptype definitions |
544 | * by means of preprocessor concatenation. |
545 | */ |
546 | #define XDP_RSS_TYPE_NONE |
547 | #define XDP_RSS_TYPE_NONE |
548 | #define XDP_RSS_TYPE_L2 |
549 | #define XDP_RSS_TYPE_NONE |
550 | #define XDP_RSS_L4 |
551 | |
552 | static const enum xdp_rss_hash_type |
553 | ice_ptype_to_xdp_hash[ICE_NUM_DEFINED_PTYPES] = { |
554 | ICE_PTYPES |
555 | }; |
556 | |
557 | #undef XDP_RSS_L3_NONE |
558 | #undef XDP_RSS_L4_NONE |
559 | #undef XDP_RSS_TYPE_PAY2 |
560 | #undef XDP_RSS_TYPE_PAY3 |
561 | #undef XDP_RSS_TYPE_PAY4 |
562 | |
563 | #undef ICE_PTT |
564 | #undef ICE_PTT_UNUSED_ENTRY |
565 | |
566 | /** |
567 | * ice_xdp_rx_hash_type - Get XDP-specific hash type from the RX descriptor |
568 | * @eop_desc: End of Packet descriptor |
569 | */ |
570 | static enum xdp_rss_hash_type |
571 | ice_xdp_rx_hash_type(const union ice_32b_rx_flex_desc *eop_desc) |
572 | { |
573 | u16 ptype = ice_get_ptype(rx_desc: eop_desc); |
574 | |
575 | if (unlikely(ptype >= ICE_NUM_DEFINED_PTYPES)) |
576 | return 0; |
577 | |
578 | return ice_ptype_to_xdp_hash[ptype]; |
579 | } |
580 | |
581 | /** |
582 | * ice_xdp_rx_hash - RX hash XDP hint handler |
583 | * @ctx: XDP buff pointer |
584 | * @hash: hash destination address |
585 | * @rss_type: XDP hash type destination address |
586 | * |
587 | * Copy RX hash (if available) and its type to the destination address. |
588 | */ |
589 | static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash, |
590 | enum xdp_rss_hash_type *) |
591 | { |
592 | const struct ice_xdp_buff *xdp_ext = (void *)ctx; |
593 | |
594 | *hash = ice_get_rx_hash(rx_desc: xdp_ext->eop_desc); |
595 | *rss_type = ice_xdp_rx_hash_type(eop_desc: xdp_ext->eop_desc); |
596 | if (!likely(*hash)) |
597 | return -ENODATA; |
598 | |
599 | return 0; |
600 | } |
601 | |
602 | /** |
603 | * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler |
604 | * @ctx: XDP buff pointer |
605 | * @vlan_proto: destination address for VLAN protocol |
606 | * @vlan_tci: destination address for VLAN TCI |
607 | * |
608 | * Copy VLAN tag (if was stripped) and corresponding protocol |
609 | * to the destination address. |
610 | */ |
611 | static int ice_xdp_rx_vlan_tag(const struct xdp_md *ctx, __be16 *vlan_proto, |
612 | u16 *vlan_tci) |
613 | { |
614 | const struct ice_xdp_buff *xdp_ext = (void *)ctx; |
615 | |
616 | *vlan_proto = xdp_ext->pkt_ctx->vlan_proto; |
617 | if (!*vlan_proto) |
618 | return -ENODATA; |
619 | |
620 | *vlan_tci = ice_get_vlan_tci(rx_desc: xdp_ext->eop_desc); |
621 | if (!*vlan_tci) |
622 | return -ENODATA; |
623 | |
624 | return 0; |
625 | } |
626 | |
627 | const struct xdp_metadata_ops ice_xdp_md_ops = { |
628 | .xmo_rx_timestamp = ice_xdp_rx_hw_ts, |
629 | .xmo_rx_hash = ice_xdp_rx_hash, |
630 | .xmo_rx_vlan_tag = ice_xdp_rx_vlan_tag, |
631 | }; |
632 | |