10891d6d4SKrzysztof Kazimierczak // SPDX-License-Identifier: GPL-2.0
20891d6d4SKrzysztof Kazimierczak /* Copyright (c) 2019, Intel Corporation. */
30891d6d4SKrzysztof Kazimierczak
4b6459415SJakub Kicinski #include <linux/filter.h>
5b6459415SJakub Kicinski
60891d6d4SKrzysztof Kazimierczak #include "ice_txrx_lib.h"
7f5396b8aSGrzegorz Nitka #include "ice_eswitch.h"
89610bd98SMaciej Fijalkowski #include "ice_lib.h"
90891d6d4SKrzysztof Kazimierczak
100891d6d4SKrzysztof Kazimierczak /**
110891d6d4SKrzysztof Kazimierczak * ice_release_rx_desc - Store the new tail and head values
120891d6d4SKrzysztof Kazimierczak * @rx_ring: ring to bump
130891d6d4SKrzysztof Kazimierczak * @val: new head index
140891d6d4SKrzysztof Kazimierczak */
ice_release_rx_desc(struct ice_rx_ring * rx_ring,u16 val)15e72bba21SMaciej Fijalkowski void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val)
160891d6d4SKrzysztof Kazimierczak {
17168983a8SBrett Creeley u16 prev_ntu = rx_ring->next_to_use & ~0x7;
180891d6d4SKrzysztof Kazimierczak
190891d6d4SKrzysztof Kazimierczak rx_ring->next_to_use = val;
200891d6d4SKrzysztof Kazimierczak
210891d6d4SKrzysztof Kazimierczak /* update next to alloc since we have filled the ring */
220891d6d4SKrzysztof Kazimierczak rx_ring->next_to_alloc = val;
230891d6d4SKrzysztof Kazimierczak
240891d6d4SKrzysztof Kazimierczak /* QRX_TAIL will be updated with any tail value, but hardware ignores
250891d6d4SKrzysztof Kazimierczak * the lower 3 bits. This makes it so we only bump tail on meaningful
260891d6d4SKrzysztof Kazimierczak * boundaries. Also, this allows us to bump tail on intervals of 8 up to
270891d6d4SKrzysztof Kazimierczak * the budget depending on the current traffic load.
280891d6d4SKrzysztof Kazimierczak */
290891d6d4SKrzysztof Kazimierczak val &= ~0x7;
300891d6d4SKrzysztof Kazimierczak if (prev_ntu != val) {
310891d6d4SKrzysztof Kazimierczak /* Force memory writes to complete before letting h/w
320891d6d4SKrzysztof Kazimierczak * know there are new descriptors to fetch. (Only
330891d6d4SKrzysztof Kazimierczak * applicable for weak-ordered memory model archs,
340891d6d4SKrzysztof Kazimierczak * such as IA-64).
350891d6d4SKrzysztof Kazimierczak */
360891d6d4SKrzysztof Kazimierczak wmb();
370891d6d4SKrzysztof Kazimierczak writel(val, rx_ring->tail);
380891d6d4SKrzysztof Kazimierczak }
390891d6d4SKrzysztof Kazimierczak }
400891d6d4SKrzysztof Kazimierczak
410891d6d4SKrzysztof Kazimierczak /**
420891d6d4SKrzysztof Kazimierczak * ice_ptype_to_htype - get a hash type
430891d6d4SKrzysztof Kazimierczak * @ptype: the ptype value from the descriptor
440891d6d4SKrzysztof Kazimierczak *
45dda90cb9SJesse Brandeburg * Returns appropriate hash type (such as PKT_HASH_TYPE_L2/L3/L4) to be used by
46dda90cb9SJesse Brandeburg * skb_set_hash based on PTYPE as parsed by HW Rx pipeline and is part of
47dda90cb9SJesse Brandeburg * Rx desc.
480891d6d4SKrzysztof Kazimierczak */
ice_ptype_to_htype(u16 ptype)49dda90cb9SJesse Brandeburg static enum pkt_hash_types ice_ptype_to_htype(u16 ptype)
500891d6d4SKrzysztof Kazimierczak {
51dda90cb9SJesse Brandeburg struct ice_rx_ptype_decoded decoded = ice_decode_rx_desc_ptype(ptype);
52dda90cb9SJesse Brandeburg
53dda90cb9SJesse Brandeburg if (!decoded.known)
54dda90cb9SJesse Brandeburg return PKT_HASH_TYPE_NONE;
55dda90cb9SJesse Brandeburg if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY4)
56dda90cb9SJesse Brandeburg return PKT_HASH_TYPE_L4;
57dda90cb9SJesse Brandeburg if (decoded.payload_layer == ICE_RX_PTYPE_PAYLOAD_LAYER_PAY3)
58dda90cb9SJesse Brandeburg return PKT_HASH_TYPE_L3;
59dda90cb9SJesse Brandeburg if (decoded.outer_ip == ICE_RX_PTYPE_OUTER_L2)
60dda90cb9SJesse Brandeburg return PKT_HASH_TYPE_L2;
61dda90cb9SJesse Brandeburg
620891d6d4SKrzysztof Kazimierczak return PKT_HASH_TYPE_NONE;
630891d6d4SKrzysztof Kazimierczak }
640891d6d4SKrzysztof Kazimierczak
650891d6d4SKrzysztof Kazimierczak /**
660891d6d4SKrzysztof Kazimierczak * ice_rx_hash - set the hash value in the skb
670891d6d4SKrzysztof Kazimierczak * @rx_ring: descriptor ring
680891d6d4SKrzysztof Kazimierczak * @rx_desc: specific descriptor
690891d6d4SKrzysztof Kazimierczak * @skb: pointer to current skb
700891d6d4SKrzysztof Kazimierczak * @rx_ptype: the ptype value from the descriptor
710891d6d4SKrzysztof Kazimierczak */
720891d6d4SKrzysztof Kazimierczak static void
ice_rx_hash(struct ice_rx_ring * rx_ring,union ice_32b_rx_flex_desc * rx_desc,struct sk_buff * skb,u16 rx_ptype)73e72bba21SMaciej Fijalkowski ice_rx_hash(struct ice_rx_ring *rx_ring, union ice_32b_rx_flex_desc *rx_desc,
74dda90cb9SJesse Brandeburg struct sk_buff *skb, u16 rx_ptype)
750891d6d4SKrzysztof Kazimierczak {
760891d6d4SKrzysztof Kazimierczak struct ice_32b_rx_flex_desc_nic *nic_mdid;
770891d6d4SKrzysztof Kazimierczak u32 hash;
780891d6d4SKrzysztof Kazimierczak
790891d6d4SKrzysztof Kazimierczak if (!(rx_ring->netdev->features & NETIF_F_RXHASH))
800891d6d4SKrzysztof Kazimierczak return;
810891d6d4SKrzysztof Kazimierczak
820891d6d4SKrzysztof Kazimierczak if (rx_desc->wb.rxdid != ICE_RXDID_FLEX_NIC)
830891d6d4SKrzysztof Kazimierczak return;
840891d6d4SKrzysztof Kazimierczak
850891d6d4SKrzysztof Kazimierczak nic_mdid = (struct ice_32b_rx_flex_desc_nic *)rx_desc;
860891d6d4SKrzysztof Kazimierczak hash = le32_to_cpu(nic_mdid->rss_hash);
870891d6d4SKrzysztof Kazimierczak skb_set_hash(skb, hash, ice_ptype_to_htype(rx_ptype));
880891d6d4SKrzysztof Kazimierczak }
890891d6d4SKrzysztof Kazimierczak
900891d6d4SKrzysztof Kazimierczak /**
910891d6d4SKrzysztof Kazimierczak * ice_rx_csum - Indicate in skb if checksum is good
920891d6d4SKrzysztof Kazimierczak * @ring: the ring we care about
930891d6d4SKrzysztof Kazimierczak * @skb: skb currently being received and modified
940891d6d4SKrzysztof Kazimierczak * @rx_desc: the receive descriptor
950891d6d4SKrzysztof Kazimierczak * @ptype: the packet type decoded by hardware
960891d6d4SKrzysztof Kazimierczak *
970891d6d4SKrzysztof Kazimierczak * skb->protocol must be set before this function is called
980891d6d4SKrzysztof Kazimierczak */
990891d6d4SKrzysztof Kazimierczak static void
ice_rx_csum(struct ice_rx_ring * ring,struct sk_buff * skb,union ice_32b_rx_flex_desc * rx_desc,u16 ptype)100e72bba21SMaciej Fijalkowski ice_rx_csum(struct ice_rx_ring *ring, struct sk_buff *skb,
101dda90cb9SJesse Brandeburg union ice_32b_rx_flex_desc *rx_desc, u16 ptype)
1020891d6d4SKrzysztof Kazimierczak {
1030891d6d4SKrzysztof Kazimierczak struct ice_rx_ptype_decoded decoded;
10413f90b39SAnirudh Venkataramanan u16 rx_status0, rx_status1;
1050891d6d4SKrzysztof Kazimierczak bool ipv4, ipv6;
1060891d6d4SKrzysztof Kazimierczak
10713f90b39SAnirudh Venkataramanan rx_status0 = le16_to_cpu(rx_desc->wb.status_error0);
10813f90b39SAnirudh Venkataramanan rx_status1 = le16_to_cpu(rx_desc->wb.status_error1);
1090891d6d4SKrzysztof Kazimierczak
1100891d6d4SKrzysztof Kazimierczak decoded = ice_decode_rx_desc_ptype(ptype);
1110891d6d4SKrzysztof Kazimierczak
1120891d6d4SKrzysztof Kazimierczak /* Start with CHECKSUM_NONE and by default csum_level = 0 */
1130891d6d4SKrzysztof Kazimierczak skb->ip_summed = CHECKSUM_NONE;
1140891d6d4SKrzysztof Kazimierczak skb_checksum_none_assert(skb);
1150891d6d4SKrzysztof Kazimierczak
1160891d6d4SKrzysztof Kazimierczak /* check if Rx checksum is enabled */
1170891d6d4SKrzysztof Kazimierczak if (!(ring->netdev->features & NETIF_F_RXCSUM))
1180891d6d4SKrzysztof Kazimierczak return;
1190891d6d4SKrzysztof Kazimierczak
1200891d6d4SKrzysztof Kazimierczak /* check if HW has decoded the packet and checksum */
12113f90b39SAnirudh Venkataramanan if (!(rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_L3L4P_S)))
1220891d6d4SKrzysztof Kazimierczak return;
1230891d6d4SKrzysztof Kazimierczak
1240891d6d4SKrzysztof Kazimierczak if (!(decoded.known && decoded.outer_ip))
1250891d6d4SKrzysztof Kazimierczak return;
1260891d6d4SKrzysztof Kazimierczak
1270891d6d4SKrzysztof Kazimierczak ipv4 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) &&
1280891d6d4SKrzysztof Kazimierczak (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV4);
1290891d6d4SKrzysztof Kazimierczak ipv6 = (decoded.outer_ip == ICE_RX_PTYPE_OUTER_IP) &&
1300891d6d4SKrzysztof Kazimierczak (decoded.outer_ip_ver == ICE_RX_PTYPE_OUTER_IPV6);
1310891d6d4SKrzysztof Kazimierczak
13213f90b39SAnirudh Venkataramanan if (ipv4 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_IPE_S) |
1330891d6d4SKrzysztof Kazimierczak BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EIPE_S))))
1340891d6d4SKrzysztof Kazimierczak goto checksum_fail;
13513f90b39SAnirudh Venkataramanan
13613f90b39SAnirudh Venkataramanan if (ipv6 && (rx_status0 & (BIT(ICE_RX_FLEX_DESC_STATUS0_IPV6EXADD_S))))
1370891d6d4SKrzysztof Kazimierczak goto checksum_fail;
1380891d6d4SKrzysztof Kazimierczak
1390891d6d4SKrzysztof Kazimierczak /* check for L4 errors and handle packets that were not able to be
1400891d6d4SKrzysztof Kazimierczak * checksummed due to arrival speed
1410891d6d4SKrzysztof Kazimierczak */
14213f90b39SAnirudh Venkataramanan if (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_L4E_S))
1430891d6d4SKrzysztof Kazimierczak goto checksum_fail;
1440891d6d4SKrzysztof Kazimierczak
145a4e82a81STony Nguyen /* check for outer UDP checksum error in tunneled packets */
14613f90b39SAnirudh Venkataramanan if ((rx_status1 & BIT(ICE_RX_FLEX_DESC_STATUS1_NAT_S)) &&
14713f90b39SAnirudh Venkataramanan (rx_status0 & BIT(ICE_RX_FLEX_DESC_STATUS0_XSUM_EUDPE_S)))
148a4e82a81STony Nguyen goto checksum_fail;
149a4e82a81STony Nguyen
150a4e82a81STony Nguyen /* If there is an outer header present that might contain a checksum
151a4e82a81STony Nguyen * we need to bump the checksum level by 1 to reflect the fact that
152a4e82a81STony Nguyen * we are indicating we validated the inner checksum.
153a4e82a81STony Nguyen */
154a4e82a81STony Nguyen if (decoded.tunnel_type >= ICE_RX_PTYPE_TUNNEL_IP_GRENAT)
155a4e82a81STony Nguyen skb->csum_level = 1;
156a4e82a81STony Nguyen
1570891d6d4SKrzysztof Kazimierczak /* Only report checksum unnecessary for TCP, UDP, or SCTP */
1580891d6d4SKrzysztof Kazimierczak switch (decoded.inner_prot) {
1590891d6d4SKrzysztof Kazimierczak case ICE_RX_PTYPE_INNER_PROT_TCP:
1600891d6d4SKrzysztof Kazimierczak case ICE_RX_PTYPE_INNER_PROT_UDP:
1610891d6d4SKrzysztof Kazimierczak case ICE_RX_PTYPE_INNER_PROT_SCTP:
1620891d6d4SKrzysztof Kazimierczak skb->ip_summed = CHECKSUM_UNNECESSARY;
1639ded647aSGustavo A. R. Silva break;
1640891d6d4SKrzysztof Kazimierczak default:
1650891d6d4SKrzysztof Kazimierczak break;
1660891d6d4SKrzysztof Kazimierczak }
1670891d6d4SKrzysztof Kazimierczak return;
1680891d6d4SKrzysztof Kazimierczak
1690891d6d4SKrzysztof Kazimierczak checksum_fail:
1700891d6d4SKrzysztof Kazimierczak ring->vsi->back->hw_csum_rx_error++;
1710891d6d4SKrzysztof Kazimierczak }
1720891d6d4SKrzysztof Kazimierczak
1730891d6d4SKrzysztof Kazimierczak /**
1740891d6d4SKrzysztof Kazimierczak * ice_process_skb_fields - Populate skb header fields from Rx descriptor
1750891d6d4SKrzysztof Kazimierczak * @rx_ring: Rx descriptor ring packet is being transacted on
1760891d6d4SKrzysztof Kazimierczak * @rx_desc: pointer to the EOP Rx descriptor
1770891d6d4SKrzysztof Kazimierczak * @skb: pointer to current skb being populated
1780891d6d4SKrzysztof Kazimierczak * @ptype: the packet type decoded by hardware
1790891d6d4SKrzysztof Kazimierczak *
1800891d6d4SKrzysztof Kazimierczak * This function checks the ring, descriptor, and packet information in
1810891d6d4SKrzysztof Kazimierczak * order to populate the hash, checksum, VLAN, protocol, and
1820891d6d4SKrzysztof Kazimierczak * other fields within the skb.
1830891d6d4SKrzysztof Kazimierczak */
1840891d6d4SKrzysztof Kazimierczak void
ice_process_skb_fields(struct ice_rx_ring * rx_ring,union ice_32b_rx_flex_desc * rx_desc,struct sk_buff * skb,u16 ptype)185e72bba21SMaciej Fijalkowski ice_process_skb_fields(struct ice_rx_ring *rx_ring,
1860891d6d4SKrzysztof Kazimierczak union ice_32b_rx_flex_desc *rx_desc,
187dda90cb9SJesse Brandeburg struct sk_buff *skb, u16 ptype)
1880891d6d4SKrzysztof Kazimierczak {
1890891d6d4SKrzysztof Kazimierczak ice_rx_hash(rx_ring, rx_desc, skb, ptype);
1900891d6d4SKrzysztof Kazimierczak
1910891d6d4SKrzysztof Kazimierczak /* modifies the skb - consumes the enet header */
192c1e5da5dSWojciech Drewek skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1930891d6d4SKrzysztof Kazimierczak
1940891d6d4SKrzysztof Kazimierczak ice_rx_csum(rx_ring, skb, rx_desc, ptype);
19577a78115SJacob Keller
19677a78115SJacob Keller if (rx_ring->ptp_rx)
19777a78115SJacob Keller ice_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1980891d6d4SKrzysztof Kazimierczak }
1990891d6d4SKrzysztof Kazimierczak
2000891d6d4SKrzysztof Kazimierczak /**
2010891d6d4SKrzysztof Kazimierczak * ice_receive_skb - Send a completed packet up the stack
2020891d6d4SKrzysztof Kazimierczak * @rx_ring: Rx ring in play
2030891d6d4SKrzysztof Kazimierczak * @skb: packet to send up
2040891d6d4SKrzysztof Kazimierczak * @vlan_tag: VLAN tag for packet
2050891d6d4SKrzysztof Kazimierczak *
2060891d6d4SKrzysztof Kazimierczak * This function sends the completed packet (via. skb) up the stack using
2070891d6d4SKrzysztof Kazimierczak * gro receive functions (with/without VLAN tag)
2080891d6d4SKrzysztof Kazimierczak */
2090891d6d4SKrzysztof Kazimierczak void
ice_receive_skb(struct ice_rx_ring * rx_ring,struct sk_buff * skb,u16 vlan_tag)210e72bba21SMaciej Fijalkowski ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag)
2110891d6d4SKrzysztof Kazimierczak {
2120d54d8f7SBrett Creeley netdev_features_t features = rx_ring->netdev->features;
2130d54d8f7SBrett Creeley bool non_zero_vlan = !!(vlan_tag & VLAN_VID_MASK);
2140d54d8f7SBrett Creeley
2150d54d8f7SBrett Creeley if ((features & NETIF_F_HW_VLAN_CTAG_RX) && non_zero_vlan)
2160891d6d4SKrzysztof Kazimierczak __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
2170d54d8f7SBrett Creeley else if ((features & NETIF_F_HW_VLAN_STAG_RX) && non_zero_vlan)
2180d54d8f7SBrett Creeley __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD), vlan_tag);
2190d54d8f7SBrett Creeley
220f73fc403SEric Dumazet napi_gro_receive(&rx_ring->q_vector->napi, skb);
2210891d6d4SKrzysztof Kazimierczak }
2220891d6d4SKrzysztof Kazimierczak
2230891d6d4SKrzysztof Kazimierczak /**
2243246a107SMaciej Fijalkowski * ice_clean_xdp_tx_buf - Free and unmap XDP Tx buffer
225055d0920SAlexander Lobakin * @dev: device for DMA mapping
2263246a107SMaciej Fijalkowski * @tx_buf: Tx buffer to clean
227055d0920SAlexander Lobakin * @bq: XDP bulk flush struct
2289610bd98SMaciej Fijalkowski */
2293246a107SMaciej Fijalkowski static void
ice_clean_xdp_tx_buf(struct device * dev,struct ice_tx_buf * tx_buf,struct xdp_frame_bulk * bq)230055d0920SAlexander Lobakin ice_clean_xdp_tx_buf(struct device *dev, struct ice_tx_buf *tx_buf,
231055d0920SAlexander Lobakin struct xdp_frame_bulk *bq)
2329610bd98SMaciej Fijalkowski {
233055d0920SAlexander Lobakin dma_unmap_single(dev, dma_unmap_addr(tx_buf, dma),
2349610bd98SMaciej Fijalkowski dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
2359610bd98SMaciej Fijalkowski dma_unmap_len_set(tx_buf, len, 0);
236aa1d3fafSAlexander Lobakin
237aa1d3fafSAlexander Lobakin switch (tx_buf->type) {
238aa1d3fafSAlexander Lobakin case ICE_TX_BUF_XDP_TX:
2393246a107SMaciej Fijalkowski page_frag_free(tx_buf->raw_buf);
240aa1d3fafSAlexander Lobakin break;
241055d0920SAlexander Lobakin case ICE_TX_BUF_XDP_XMIT:
242055d0920SAlexander Lobakin xdp_return_frame_bulk(tx_buf->xdpf, bq);
243055d0920SAlexander Lobakin break;
244aa1d3fafSAlexander Lobakin }
245aa1d3fafSAlexander Lobakin
246aa1d3fafSAlexander Lobakin tx_buf->type = ICE_TX_BUF_EMPTY;
2479610bd98SMaciej Fijalkowski }
2489610bd98SMaciej Fijalkowski
2499610bd98SMaciej Fijalkowski /**
2503246a107SMaciej Fijalkowski * ice_clean_xdp_irq - Reclaim resources after transmit completes on XDP ring
2513246a107SMaciej Fijalkowski * @xdp_ring: XDP ring to clean
2523246a107SMaciej Fijalkowski */
ice_clean_xdp_irq(struct ice_tx_ring * xdp_ring)2533246a107SMaciej Fijalkowski static u32 ice_clean_xdp_irq(struct ice_tx_ring *xdp_ring)
2543246a107SMaciej Fijalkowski {
2553246a107SMaciej Fijalkowski int total_bytes = 0, total_pkts = 0;
256055d0920SAlexander Lobakin struct device *dev = xdp_ring->dev;
2573246a107SMaciej Fijalkowski u32 ntc = xdp_ring->next_to_clean;
2583246a107SMaciej Fijalkowski struct ice_tx_desc *tx_desc;
2593246a107SMaciej Fijalkowski u32 cnt = xdp_ring->count;
260055d0920SAlexander Lobakin struct xdp_frame_bulk bq;
261bc4db834SAlexander Lobakin u32 frags, xdp_tx = 0;
2623246a107SMaciej Fijalkowski u32 ready_frames = 0;
2633246a107SMaciej Fijalkowski u32 idx;
2643246a107SMaciej Fijalkowski u32 ret;
2653246a107SMaciej Fijalkowski
2663246a107SMaciej Fijalkowski idx = xdp_ring->tx_buf[ntc].rs_idx;
2673246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, idx);
2683246a107SMaciej Fijalkowski if (tx_desc->cmd_type_offset_bsz &
2693246a107SMaciej Fijalkowski cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)) {
2703246a107SMaciej Fijalkowski if (idx >= ntc)
2713246a107SMaciej Fijalkowski ready_frames = idx - ntc + 1;
2723246a107SMaciej Fijalkowski else
2733246a107SMaciej Fijalkowski ready_frames = idx + cnt - ntc + 1;
2743246a107SMaciej Fijalkowski }
2753246a107SMaciej Fijalkowski
2760bd939b6SAlexander Lobakin if (unlikely(!ready_frames))
2773246a107SMaciej Fijalkowski return 0;
2783246a107SMaciej Fijalkowski ret = ready_frames;
2793246a107SMaciej Fijalkowski
280055d0920SAlexander Lobakin xdp_frame_bulk_init(&bq);
281055d0920SAlexander Lobakin rcu_read_lock(); /* xdp_return_frame_bulk() */
282055d0920SAlexander Lobakin
2833246a107SMaciej Fijalkowski while (ready_frames) {
2843246a107SMaciej Fijalkowski struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc];
285aa1d3fafSAlexander Lobakin struct ice_tx_buf *head = tx_buf;
2863246a107SMaciej Fijalkowski
2873246a107SMaciej Fijalkowski /* bytecount holds size of head + frags */
2883246a107SMaciej Fijalkowski total_bytes += tx_buf->bytecount;
2893246a107SMaciej Fijalkowski frags = tx_buf->nr_frags;
2903246a107SMaciej Fijalkowski total_pkts++;
2913246a107SMaciej Fijalkowski /* count head + frags */
2923246a107SMaciej Fijalkowski ready_frames -= frags + 1;
293bc4db834SAlexander Lobakin xdp_tx++;
2943246a107SMaciej Fijalkowski
2953246a107SMaciej Fijalkowski ntc++;
2963246a107SMaciej Fijalkowski if (ntc == cnt)
2973246a107SMaciej Fijalkowski ntc = 0;
2983246a107SMaciej Fijalkowski
2993246a107SMaciej Fijalkowski for (int i = 0; i < frags; i++) {
3003246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntc];
3013246a107SMaciej Fijalkowski
302055d0920SAlexander Lobakin ice_clean_xdp_tx_buf(dev, tx_buf, &bq);
3033246a107SMaciej Fijalkowski ntc++;
3043246a107SMaciej Fijalkowski if (ntc == cnt)
3053246a107SMaciej Fijalkowski ntc = 0;
3063246a107SMaciej Fijalkowski }
307aa1d3fafSAlexander Lobakin
308055d0920SAlexander Lobakin ice_clean_xdp_tx_buf(dev, head, &bq);
3093246a107SMaciej Fijalkowski }
3103246a107SMaciej Fijalkowski
311055d0920SAlexander Lobakin xdp_flush_frame_bulk(&bq);
312055d0920SAlexander Lobakin rcu_read_unlock();
313055d0920SAlexander Lobakin
3143246a107SMaciej Fijalkowski tx_desc->cmd_type_offset_bsz = 0;
3153246a107SMaciej Fijalkowski xdp_ring->next_to_clean = ntc;
316bc4db834SAlexander Lobakin xdp_ring->xdp_tx_active -= xdp_tx;
3173246a107SMaciej Fijalkowski ice_update_tx_ring_stats(xdp_ring, total_pkts, total_bytes);
3183246a107SMaciej Fijalkowski
3193246a107SMaciej Fijalkowski return ret;
3203246a107SMaciej Fijalkowski }
3213246a107SMaciej Fijalkowski
3223246a107SMaciej Fijalkowski /**
3233246a107SMaciej Fijalkowski * __ice_xmit_xdp_ring - submit frame to XDP ring for transmission
3243246a107SMaciej Fijalkowski * @xdp: XDP buffer to be placed onto Tx descriptors
3250891d6d4SKrzysztof Kazimierczak * @xdp_ring: XDP ring for transmission
326055d0920SAlexander Lobakin * @frame: whether this comes from .ndo_xdp_xmit()
3270891d6d4SKrzysztof Kazimierczak */
__ice_xmit_xdp_ring(struct xdp_buff * xdp,struct ice_tx_ring * xdp_ring,bool frame)328055d0920SAlexander Lobakin int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring,
329055d0920SAlexander Lobakin bool frame)
3300891d6d4SKrzysztof Kazimierczak {
3313246a107SMaciej Fijalkowski struct skb_shared_info *sinfo = NULL;
3323246a107SMaciej Fijalkowski u32 size = xdp->data_end - xdp->data;
3333246a107SMaciej Fijalkowski struct device *dev = xdp_ring->dev;
3343246a107SMaciej Fijalkowski u32 ntu = xdp_ring->next_to_use;
3350891d6d4SKrzysztof Kazimierczak struct ice_tx_desc *tx_desc;
3363246a107SMaciej Fijalkowski struct ice_tx_buf *tx_head;
3370891d6d4SKrzysztof Kazimierczak struct ice_tx_buf *tx_buf;
3383246a107SMaciej Fijalkowski u32 cnt = xdp_ring->count;
3393246a107SMaciej Fijalkowski void *data = xdp->data;
3403246a107SMaciej Fijalkowski u32 nr_frags = 0;
3413246a107SMaciej Fijalkowski u32 free_space;
3423246a107SMaciej Fijalkowski u32 frag = 0;
3430891d6d4SKrzysztof Kazimierczak
3443246a107SMaciej Fijalkowski free_space = ICE_DESC_UNUSED(xdp_ring);
3450bd939b6SAlexander Lobakin if (free_space < ICE_RING_QUARTER(xdp_ring))
3463246a107SMaciej Fijalkowski free_space += ice_clean_xdp_irq(xdp_ring);
3473246a107SMaciej Fijalkowski
3480bd939b6SAlexander Lobakin if (unlikely(!free_space))
3490bd939b6SAlexander Lobakin goto busy;
3500bd939b6SAlexander Lobakin
3513246a107SMaciej Fijalkowski if (unlikely(xdp_buff_has_frags(xdp))) {
3523246a107SMaciej Fijalkowski sinfo = xdp_get_shared_info_from_buff(xdp);
3533246a107SMaciej Fijalkowski nr_frags = sinfo->nr_frags;
3540bd939b6SAlexander Lobakin if (free_space < nr_frags + 1)
3550bd939b6SAlexander Lobakin goto busy;
3563246a107SMaciej Fijalkowski }
3570891d6d4SKrzysztof Kazimierczak
3583246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, ntu);
3593246a107SMaciej Fijalkowski tx_head = &xdp_ring->tx_buf[ntu];
3603246a107SMaciej Fijalkowski tx_buf = tx_head;
3610891d6d4SKrzysztof Kazimierczak
3623246a107SMaciej Fijalkowski for (;;) {
3633246a107SMaciej Fijalkowski dma_addr_t dma;
3643246a107SMaciej Fijalkowski
3653246a107SMaciej Fijalkowski dma = dma_map_single(dev, data, size, DMA_TO_DEVICE);
3663246a107SMaciej Fijalkowski if (dma_mapping_error(dev, dma))
3673246a107SMaciej Fijalkowski goto dma_unmap;
3680891d6d4SKrzysztof Kazimierczak
3690891d6d4SKrzysztof Kazimierczak /* record length, and DMA address */
3700891d6d4SKrzysztof Kazimierczak dma_unmap_len_set(tx_buf, len, size);
3710891d6d4SKrzysztof Kazimierczak dma_unmap_addr_set(tx_buf, dma, dma);
3720891d6d4SKrzysztof Kazimierczak
373055d0920SAlexander Lobakin if (frame) {
374055d0920SAlexander Lobakin tx_buf->type = ICE_TX_BUF_FRAG;
375055d0920SAlexander Lobakin } else {
376aa1d3fafSAlexander Lobakin tx_buf->type = ICE_TX_BUF_XDP_TX;
3773246a107SMaciej Fijalkowski tx_buf->raw_buf = data;
378055d0920SAlexander Lobakin }
379055d0920SAlexander Lobakin
380055d0920SAlexander Lobakin tx_desc->buf_addr = cpu_to_le64(dma);
381055d0920SAlexander Lobakin tx_desc->cmd_type_offset_bsz = ice_build_ctob(0, 0, size, 0);
3823246a107SMaciej Fijalkowski
3833246a107SMaciej Fijalkowski ntu++;
3843246a107SMaciej Fijalkowski if (ntu == cnt)
3853246a107SMaciej Fijalkowski ntu = 0;
3863246a107SMaciej Fijalkowski
3873246a107SMaciej Fijalkowski if (frag == nr_frags)
3883246a107SMaciej Fijalkowski break;
3893246a107SMaciej Fijalkowski
3903246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, ntu);
3913246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntu];
3923246a107SMaciej Fijalkowski
3933246a107SMaciej Fijalkowski data = skb_frag_address(&sinfo->frags[frag]);
3943246a107SMaciej Fijalkowski size = skb_frag_size(&sinfo->frags[frag]);
3953246a107SMaciej Fijalkowski frag++;
3963246a107SMaciej Fijalkowski }
3973246a107SMaciej Fijalkowski
3983246a107SMaciej Fijalkowski /* store info about bytecount and frag count in first desc */
3993246a107SMaciej Fijalkowski tx_head->bytecount = xdp_get_buff_len(xdp);
4003246a107SMaciej Fijalkowski tx_head->nr_frags = nr_frags;
4013246a107SMaciej Fijalkowski
402055d0920SAlexander Lobakin if (frame) {
403055d0920SAlexander Lobakin tx_head->type = ICE_TX_BUF_XDP_XMIT;
404055d0920SAlexander Lobakin tx_head->xdpf = xdp->data_hard_start;
405055d0920SAlexander Lobakin }
406055d0920SAlexander Lobakin
4073246a107SMaciej Fijalkowski /* update last descriptor from a frame with EOP */
4083246a107SMaciej Fijalkowski tx_desc->cmd_type_offset_bsz |=
4093246a107SMaciej Fijalkowski cpu_to_le64(ICE_TX_DESC_CMD_EOP << ICE_TXD_QW1_CMD_S);
4100891d6d4SKrzysztof Kazimierczak
41159e92bfeSMaciej Fijalkowski xdp_ring->xdp_tx_active++;
4123246a107SMaciej Fijalkowski xdp_ring->next_to_use = ntu;
4139610bd98SMaciej Fijalkowski
4140891d6d4SKrzysztof Kazimierczak return ICE_XDP_TX;
4153246a107SMaciej Fijalkowski
4163246a107SMaciej Fijalkowski dma_unmap:
4173246a107SMaciej Fijalkowski for (;;) {
4183246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntu];
4193246a107SMaciej Fijalkowski dma_unmap_page(dev, dma_unmap_addr(tx_buf, dma),
4203246a107SMaciej Fijalkowski dma_unmap_len(tx_buf, len), DMA_TO_DEVICE);
4213246a107SMaciej Fijalkowski dma_unmap_len_set(tx_buf, len, 0);
4223246a107SMaciej Fijalkowski if (tx_buf == tx_head)
4233246a107SMaciej Fijalkowski break;
4243246a107SMaciej Fijalkowski
4253246a107SMaciej Fijalkowski if (!ntu)
4263246a107SMaciej Fijalkowski ntu += cnt;
4273246a107SMaciej Fijalkowski ntu--;
4283246a107SMaciej Fijalkowski }
4293246a107SMaciej Fijalkowski return ICE_XDP_CONSUMED;
4300bd939b6SAlexander Lobakin
4310bd939b6SAlexander Lobakin busy:
4320bd939b6SAlexander Lobakin xdp_ring->ring_stats->tx_stats.tx_busy++;
4330bd939b6SAlexander Lobakin
4340bd939b6SAlexander Lobakin return ICE_XDP_CONSUMED;
4353246a107SMaciej Fijalkowski }
4363246a107SMaciej Fijalkowski
4373246a107SMaciej Fijalkowski /**
4380891d6d4SKrzysztof Kazimierczak * ice_finalize_xdp_rx - Bump XDP Tx tail and/or flush redirect map
439eb087cd8SMaciej Fijalkowski * @xdp_ring: XDP ring
4400891d6d4SKrzysztof Kazimierczak * @xdp_res: Result of the receive batch
441*66ceaa4cSJesse Brandeburg * @first_idx: index to write from caller
4420891d6d4SKrzysztof Kazimierczak *
4430891d6d4SKrzysztof Kazimierczak * This function bumps XDP Tx tail and/or flush redirect map, and
4440891d6d4SKrzysztof Kazimierczak * should be called when a batch of packets has been processed in the
4450891d6d4SKrzysztof Kazimierczak * napi loop.
4460891d6d4SKrzysztof Kazimierczak */
ice_finalize_xdp_rx(struct ice_tx_ring * xdp_ring,unsigned int xdp_res,u32 first_idx)4473246a107SMaciej Fijalkowski void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res,
4483246a107SMaciej Fijalkowski u32 first_idx)
4490891d6d4SKrzysztof Kazimierczak {
4503246a107SMaciej Fijalkowski struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[first_idx];
4513246a107SMaciej Fijalkowski
4520891d6d4SKrzysztof Kazimierczak if (xdp_res & ICE_XDP_REDIR)
4530891d6d4SKrzysztof Kazimierczak xdp_do_flush_map();
4540891d6d4SKrzysztof Kazimierczak
45522bf877eSMaciej Fijalkowski if (xdp_res & ICE_XDP_TX) {
45622bf877eSMaciej Fijalkowski if (static_branch_unlikely(&ice_xdp_locking_key))
45722bf877eSMaciej Fijalkowski spin_lock(&xdp_ring->tx_lock);
4583246a107SMaciej Fijalkowski /* store index of descriptor with RS bit set in the first
4593246a107SMaciej Fijalkowski * ice_tx_buf of given NAPI batch
4603246a107SMaciej Fijalkowski */
4613246a107SMaciej Fijalkowski tx_buf->rs_idx = ice_set_rs_bit(xdp_ring);
4620891d6d4SKrzysztof Kazimierczak ice_xdp_ring_update_tail(xdp_ring);
46322bf877eSMaciej Fijalkowski if (static_branch_unlikely(&ice_xdp_locking_key))
46422bf877eSMaciej Fijalkowski spin_unlock(&xdp_ring->tx_lock);
46522bf877eSMaciej Fijalkowski }
4660891d6d4SKrzysztof Kazimierczak }
467