Lines Matching +full:xdp +full:- +full:rx +full:- +full:metadata
1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright 2005-2006 Fen Systems Ltd.
5 * Copyright 2005-2013 Solarflare Communications Inc.
20 #include <net/xdp.h>
33 /* Maximum rx prefix used by any architecture. */
47 struct efx_nic *efx = rx_queue->efx; in efx_rx_packet__check_len()
48 unsigned max_len = rx_buf->len - efx->type->rx_buffer_padding; in efx_rx_packet__check_len()
56 rx_buf->flags |= EFX_RX_PKT_DISCARD; in efx_rx_packet__check_len()
59 netif_err(efx, rx_err, efx->net_dev, in efx_rx_packet__check_len()
60 "RX queue %d overlength RX event (%#x > %#x)\n", in efx_rx_packet__check_len()
63 efx_rx_queue_channel(rx_queue)->n_rx_overlength++; in efx_rx_packet__check_len()
72 struct efx_nic *efx = channel->efx; in efx_rx_mk_skb()
76 skb = netdev_alloc_skb(efx->net_dev, in efx_rx_mk_skb()
77 efx->rx_ip_align + efx->rx_prefix_size + in efx_rx_mk_skb()
80 atomic_inc(&efx->n_rx_noskb_drops); in efx_rx_mk_skb()
84 EFX_WARN_ON_ONCE_PARANOID(rx_buf->len < hdr_len); in efx_rx_mk_skb()
86 memcpy(skb->data + efx->rx_ip_align, eh - efx->rx_prefix_size, in efx_rx_mk_skb()
87 efx->rx_prefix_size + hdr_len); in efx_rx_mk_skb()
88 skb_reserve(skb, efx->rx_ip_align + efx->rx_prefix_size); in efx_rx_mk_skb()
92 if (rx_buf->len > hdr_len) { in efx_rx_mk_skb()
93 rx_buf->page_offset += hdr_len; in efx_rx_mk_skb()
94 rx_buf->len -= hdr_len; in efx_rx_mk_skb()
97 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, in efx_rx_mk_skb()
98 rx_buf->page, rx_buf->page_offset, in efx_rx_mk_skb()
99 rx_buf->len, efx->rx_buffer_truesize); in efx_rx_mk_skb()
100 rx_buf->page = NULL; in efx_rx_mk_skb()
102 if (skb_shinfo(skb)->nr_frags == n_frags) in efx_rx_mk_skb()
105 rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf); in efx_rx_mk_skb()
108 __free_pages(rx_buf->page, efx->rx_buffer_order); in efx_rx_mk_skb()
109 rx_buf->page = NULL; in efx_rx_mk_skb()
114 skb->protocol = eth_type_trans(skb, efx->net_dev); in efx_rx_mk_skb()
116 skb_mark_napi_id(skb, &channel->napi_str); in efx_rx_mk_skb()
124 struct efx_nic *efx = rx_queue->efx; in efx_rx_packet()
129 rx_buf->flags |= flags; in efx_rx_packet()
136 unlikely(len <= (n_frags - 1) * efx->rx_dma_len) || in efx_rx_packet()
137 unlikely(len > n_frags * efx->rx_dma_len) || in efx_rx_packet()
138 unlikely(!efx->rx_scatter)) { in efx_rx_packet()
142 WARN_ON(!(len == 0 && rx_buf->flags & EFX_RX_PKT_DISCARD)); in efx_rx_packet()
143 rx_buf->flags |= EFX_RX_PKT_DISCARD; in efx_rx_packet()
146 netif_vdbg(efx, rx_status, efx->net_dev, in efx_rx_packet()
147 "RX queue %d received ids %x-%x len %d %s%s\n", in efx_rx_packet()
149 (index + n_frags - 1) & rx_queue->ptr_mask, len, in efx_rx_packet()
150 (rx_buf->flags & EFX_RX_PKT_CSUMMED) ? " [SUMMED]" : "", in efx_rx_packet()
151 (rx_buf->flags & EFX_RX_PKT_DISCARD) ? " [DISCARD]" : ""); in efx_rx_packet()
156 if (unlikely(rx_buf->flags & EFX_RX_PKT_DISCARD)) { in efx_rx_packet()
163 rx_buf->len = len; in efx_rx_packet()
165 /* Release and/or sync the DMA mapping - assumes all RX buffers in efx_rx_packet()
166 * consumed in-order per RX queue. in efx_rx_packet()
168 efx_sync_rx_buffer(efx, rx_buf, rx_buf->len); in efx_rx_packet()
175 rx_buf->page_offset += efx->rx_prefix_size; in efx_rx_packet()
176 rx_buf->len -= efx->rx_prefix_size; in efx_rx_packet()
182 unsigned int tail_frags = n_frags - 1; in efx_rx_packet()
186 if (--tail_frags == 0) in efx_rx_packet()
188 efx_sync_rx_buffer(efx, rx_buf, efx->rx_dma_len); in efx_rx_packet()
190 rx_buf->len = len - (n_frags - 1) * efx->rx_dma_len; in efx_rx_packet()
191 efx_sync_rx_buffer(efx, rx_buf, rx_buf->len); in efx_rx_packet()
194 /* All fragments have been DMA-synced, so recycle pages. */ in efx_rx_packet()
202 channel->rx_pkt_n_frags = n_frags; in efx_rx_packet()
203 channel->rx_pkt_index = index; in efx_rx_packet()
211 u16 hdr_len = min_t(u16, rx_buf->len, EFX_SKB_HEADERS); in efx_rx_deliver()
221 skb_record_rx_queue(skb, channel->rx_queue.core_index); in efx_rx_deliver()
225 if (likely(rx_buf->flags & EFX_RX_PKT_CSUMMED)) { in efx_rx_deliver()
226 skb->ip_summed = CHECKSUM_UNNECESSARY; in efx_rx_deliver()
227 skb->csum_level = !!(rx_buf->flags & EFX_RX_PKT_CSUM_LEVEL); in efx_rx_deliver()
232 if (channel->type->receive_skb) in efx_rx_deliver()
233 if (channel->type->receive_skb(channel, skb)) in efx_rx_deliver()
237 if (channel->rx_list != NULL) in efx_rx_deliver()
239 list_add_tail(&skb->list, channel->rx_list); in efx_rx_deliver()
245 /** efx_do_xdp: perform XDP processing on a received packet
256 struct xdp_buff xdp; in efx_do_xdp() local
261 xdp_prog = rcu_dereference_bh(efx->xdp_prog); in efx_do_xdp()
267 if (unlikely(channel->rx_pkt_n_frags > 1)) { in efx_do_xdp()
268 /* We can't do XDP on fragmented packets - drop. */ in efx_do_xdp()
270 channel->rx_pkt_n_frags); in efx_do_xdp()
272 netif_err(efx, rx_err, efx->net_dev, in efx_do_xdp()
273 "XDP is not possible with multiple receive fragments (%d)\n", in efx_do_xdp()
274 channel->rx_pkt_n_frags); in efx_do_xdp()
275 channel->n_rx_xdp_bad_drops++; in efx_do_xdp()
279 dma_sync_single_for_cpu(&efx->pci_dev->dev, rx_buf->dma_addr, in efx_do_xdp()
280 rx_buf->len, DMA_FROM_DEVICE); in efx_do_xdp()
282 /* Save the rx prefix. */ in efx_do_xdp()
283 EFX_WARN_ON_PARANOID(efx->rx_prefix_size > EFX_MAX_RX_PREFIX_SIZE); in efx_do_xdp()
284 memcpy(rx_prefix, *ehp - efx->rx_prefix_size, in efx_do_xdp()
285 efx->rx_prefix_size); in efx_do_xdp()
287 xdp_init_buff(&xdp, efx->rx_page_buf_step, &rx_queue->xdp_rxq_info); in efx_do_xdp()
288 /* No support yet for XDP metadata */ in efx_do_xdp()
289 xdp_prepare_buff(&xdp, *ehp - EFX_XDP_HEADROOM, EFX_XDP_HEADROOM, in efx_do_xdp()
290 rx_buf->len, false); in efx_do_xdp()
292 xdp_act = bpf_prog_run_xdp(xdp_prog, &xdp); in efx_do_xdp()
294 offset = (u8 *)xdp.data - *ehp; in efx_do_xdp()
298 /* Fix up rx prefix. */ in efx_do_xdp()
301 rx_buf->page_offset += offset; in efx_do_xdp()
302 rx_buf->len -= offset; in efx_do_xdp()
303 memcpy(*ehp - efx->rx_prefix_size, rx_prefix, in efx_do_xdp()
304 efx->rx_prefix_size); in efx_do_xdp()
310 xdpf = xdp_convert_buff_to_frame(&xdp); in efx_do_xdp()
315 netif_err(efx, rx_err, efx->net_dev, in efx_do_xdp()
316 "XDP TX failed (%d)\n", err); in efx_do_xdp()
317 channel->n_rx_xdp_bad_drops++; in efx_do_xdp()
318 trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); in efx_do_xdp()
320 channel->n_rx_xdp_tx++; in efx_do_xdp()
325 err = xdp_do_redirect(efx->net_dev, &xdp, xdp_prog); in efx_do_xdp()
329 netif_err(efx, rx_err, efx->net_dev, in efx_do_xdp()
330 "XDP redirect failed (%d)\n", err); in efx_do_xdp()
331 channel->n_rx_xdp_bad_drops++; in efx_do_xdp()
332 trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); in efx_do_xdp()
334 channel->n_rx_xdp_redirect++; in efx_do_xdp()
339 bpf_warn_invalid_xdp_action(efx->net_dev, xdp_prog, xdp_act); in efx_do_xdp()
341 channel->n_rx_xdp_bad_drops++; in efx_do_xdp()
342 trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); in efx_do_xdp()
346 trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); in efx_do_xdp()
350 channel->n_rx_xdp_drops++; in efx_do_xdp()
361 struct efx_nic *efx = channel->efx; in __efx_rx_packet()
363 efx_rx_buffer(rx_queue, channel->rx_pkt_index); in __efx_rx_packet()
369 if (rx_buf->flags & EFX_RX_PKT_PREFIX_LEN) { in __efx_rx_packet()
370 rx_buf->len = le16_to_cpup((__le16 *) in __efx_rx_packet()
371 (eh + efx->rx_packet_len_offset)); in __efx_rx_packet()
374 * Must do that in the driver since passing a zero-length in __efx_rx_packet()
377 if (unlikely(!rx_buf->len)) { in __efx_rx_packet()
379 channel->rx_pkt_n_frags); in __efx_rx_packet()
380 channel->n_rx_frm_trunc++; in __efx_rx_packet()
388 if (unlikely(efx->loopback_selftest)) { in __efx_rx_packet()
389 efx_loopback_rx_packet(efx, eh, rx_buf->len); in __efx_rx_packet()
391 channel->rx_pkt_n_frags); in __efx_rx_packet()
395 rx_queue->rx_packets++; in __efx_rx_packet()
396 rx_queue->rx_bytes += rx_buf->len; in __efx_rx_packet()
401 if (unlikely(!(efx->net_dev->features & NETIF_F_RXCSUM))) in __efx_rx_packet()
402 rx_buf->flags &= ~EFX_RX_PKT_CSUMMED; in __efx_rx_packet()
404 if ((rx_buf->flags & EFX_RX_PKT_TCP) && !channel->type->receive_skb) in __efx_rx_packet()
405 efx_rx_packet_gro(channel, rx_buf, channel->rx_pkt_n_frags, eh, 0); in __efx_rx_packet()
407 efx_rx_deliver(channel, eh, rx_buf, channel->rx_pkt_n_frags); in __efx_rx_packet()
409 channel->rx_pkt_n_frags = 0; in __efx_rx_packet()