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 */ 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 */ 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 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 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 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 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 2253246a107SMaciej Fijalkowski * @xdp_ring: XDP Tx ring 2263246a107SMaciej Fijalkowski * @tx_buf: Tx buffer to clean 2279610bd98SMaciej Fijalkowski */ 2283246a107SMaciej Fijalkowski static void 2293246a107SMaciej Fijalkowski ice_clean_xdp_tx_buf(struct ice_tx_ring *xdp_ring, struct ice_tx_buf *tx_buf) 2309610bd98SMaciej Fijalkowski { 2319610bd98SMaciej Fijalkowski dma_unmap_single(xdp_ring->dev, dma_unmap_addr(tx_buf, dma), 2329610bd98SMaciej Fijalkowski dma_unmap_len(tx_buf, len), DMA_TO_DEVICE); 2339610bd98SMaciej Fijalkowski dma_unmap_len_set(tx_buf, len, 0); 2343246a107SMaciej Fijalkowski page_frag_free(tx_buf->raw_buf); 2359610bd98SMaciej Fijalkowski tx_buf->raw_buf = NULL; 2369610bd98SMaciej Fijalkowski } 2379610bd98SMaciej Fijalkowski 2389610bd98SMaciej Fijalkowski /** 2393246a107SMaciej Fijalkowski * ice_clean_xdp_irq - Reclaim resources after transmit completes on XDP ring 2403246a107SMaciej Fijalkowski * @xdp_ring: XDP ring to clean 2413246a107SMaciej Fijalkowski */ 2423246a107SMaciej Fijalkowski static u32 ice_clean_xdp_irq(struct ice_tx_ring *xdp_ring) 2433246a107SMaciej Fijalkowski { 2443246a107SMaciej Fijalkowski int total_bytes = 0, total_pkts = 0; 2453246a107SMaciej Fijalkowski u32 ntc = xdp_ring->next_to_clean; 2463246a107SMaciej Fijalkowski struct ice_tx_desc *tx_desc; 2473246a107SMaciej Fijalkowski u32 cnt = xdp_ring->count; 248bc4db834SAlexander Lobakin u32 frags, xdp_tx = 0; 2493246a107SMaciej Fijalkowski u32 ready_frames = 0; 2503246a107SMaciej Fijalkowski u32 idx; 2513246a107SMaciej Fijalkowski u32 ret; 2523246a107SMaciej Fijalkowski 2533246a107SMaciej Fijalkowski idx = xdp_ring->tx_buf[ntc].rs_idx; 2543246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, idx); 2553246a107SMaciej Fijalkowski if (tx_desc->cmd_type_offset_bsz & 2563246a107SMaciej Fijalkowski cpu_to_le64(ICE_TX_DESC_DTYPE_DESC_DONE)) { 2573246a107SMaciej Fijalkowski if (idx >= ntc) 2583246a107SMaciej Fijalkowski ready_frames = idx - ntc + 1; 2593246a107SMaciej Fijalkowski else 2603246a107SMaciej Fijalkowski ready_frames = idx + cnt - ntc + 1; 2613246a107SMaciej Fijalkowski } 2623246a107SMaciej Fijalkowski 263*0bd939b6SAlexander Lobakin if (unlikely(!ready_frames)) 2643246a107SMaciej Fijalkowski return 0; 2653246a107SMaciej Fijalkowski ret = ready_frames; 2663246a107SMaciej Fijalkowski 2673246a107SMaciej Fijalkowski while (ready_frames) { 2683246a107SMaciej Fijalkowski struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[ntc]; 2693246a107SMaciej Fijalkowski 2703246a107SMaciej Fijalkowski /* bytecount holds size of head + frags */ 2713246a107SMaciej Fijalkowski total_bytes += tx_buf->bytecount; 2723246a107SMaciej Fijalkowski frags = tx_buf->nr_frags; 2733246a107SMaciej Fijalkowski total_pkts++; 2743246a107SMaciej Fijalkowski /* count head + frags */ 2753246a107SMaciej Fijalkowski ready_frames -= frags + 1; 276bc4db834SAlexander Lobakin xdp_tx++; 2773246a107SMaciej Fijalkowski 278a24b4c6eSMaciej Fijalkowski if (xdp_ring->xsk_pool) 279a24b4c6eSMaciej Fijalkowski xsk_buff_free(tx_buf->xdp); 280a24b4c6eSMaciej Fijalkowski else 2813246a107SMaciej Fijalkowski ice_clean_xdp_tx_buf(xdp_ring, tx_buf); 2823246a107SMaciej Fijalkowski ntc++; 2833246a107SMaciej Fijalkowski if (ntc == cnt) 2843246a107SMaciej Fijalkowski ntc = 0; 2853246a107SMaciej Fijalkowski 2863246a107SMaciej Fijalkowski for (int i = 0; i < frags; i++) { 2873246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntc]; 2883246a107SMaciej Fijalkowski 2893246a107SMaciej Fijalkowski ice_clean_xdp_tx_buf(xdp_ring, tx_buf); 2903246a107SMaciej Fijalkowski ntc++; 2913246a107SMaciej Fijalkowski if (ntc == cnt) 2923246a107SMaciej Fijalkowski ntc = 0; 2933246a107SMaciej Fijalkowski } 2943246a107SMaciej Fijalkowski } 2953246a107SMaciej Fijalkowski 2963246a107SMaciej Fijalkowski tx_desc->cmd_type_offset_bsz = 0; 2973246a107SMaciej Fijalkowski xdp_ring->next_to_clean = ntc; 298bc4db834SAlexander Lobakin xdp_ring->xdp_tx_active -= xdp_tx; 2993246a107SMaciej Fijalkowski ice_update_tx_ring_stats(xdp_ring, total_pkts, total_bytes); 3003246a107SMaciej Fijalkowski 3013246a107SMaciej Fijalkowski return ret; 3023246a107SMaciej Fijalkowski } 3033246a107SMaciej Fijalkowski 3043246a107SMaciej Fijalkowski /** 3053246a107SMaciej Fijalkowski * __ice_xmit_xdp_ring - submit frame to XDP ring for transmission 3063246a107SMaciej Fijalkowski * @xdp: XDP buffer to be placed onto Tx descriptors 3070891d6d4SKrzysztof Kazimierczak * @xdp_ring: XDP ring for transmission 3080891d6d4SKrzysztof Kazimierczak */ 3093246a107SMaciej Fijalkowski int __ice_xmit_xdp_ring(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring) 3100891d6d4SKrzysztof Kazimierczak { 3113246a107SMaciej Fijalkowski struct skb_shared_info *sinfo = NULL; 3123246a107SMaciej Fijalkowski u32 size = xdp->data_end - xdp->data; 3133246a107SMaciej Fijalkowski struct device *dev = xdp_ring->dev; 3143246a107SMaciej Fijalkowski u32 ntu = xdp_ring->next_to_use; 3150891d6d4SKrzysztof Kazimierczak struct ice_tx_desc *tx_desc; 3163246a107SMaciej Fijalkowski struct ice_tx_buf *tx_head; 3170891d6d4SKrzysztof Kazimierczak struct ice_tx_buf *tx_buf; 3183246a107SMaciej Fijalkowski u32 cnt = xdp_ring->count; 3193246a107SMaciej Fijalkowski void *data = xdp->data; 3203246a107SMaciej Fijalkowski u32 nr_frags = 0; 3213246a107SMaciej Fijalkowski u32 free_space; 3223246a107SMaciej Fijalkowski u32 frag = 0; 3230891d6d4SKrzysztof Kazimierczak 3243246a107SMaciej Fijalkowski free_space = ICE_DESC_UNUSED(xdp_ring); 325*0bd939b6SAlexander Lobakin if (free_space < ICE_RING_QUARTER(xdp_ring)) 3263246a107SMaciej Fijalkowski free_space += ice_clean_xdp_irq(xdp_ring); 3273246a107SMaciej Fijalkowski 328*0bd939b6SAlexander Lobakin if (unlikely(!free_space)) 329*0bd939b6SAlexander Lobakin goto busy; 330*0bd939b6SAlexander Lobakin 3313246a107SMaciej Fijalkowski if (unlikely(xdp_buff_has_frags(xdp))) { 3323246a107SMaciej Fijalkowski sinfo = xdp_get_shared_info_from_buff(xdp); 3333246a107SMaciej Fijalkowski nr_frags = sinfo->nr_frags; 334*0bd939b6SAlexander Lobakin if (free_space < nr_frags + 1) 335*0bd939b6SAlexander Lobakin goto busy; 3363246a107SMaciej Fijalkowski } 3370891d6d4SKrzysztof Kazimierczak 3383246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, ntu); 3393246a107SMaciej Fijalkowski tx_head = &xdp_ring->tx_buf[ntu]; 3403246a107SMaciej Fijalkowski tx_buf = tx_head; 3410891d6d4SKrzysztof Kazimierczak 3423246a107SMaciej Fijalkowski for (;;) { 3433246a107SMaciej Fijalkowski dma_addr_t dma; 3443246a107SMaciej Fijalkowski 3453246a107SMaciej Fijalkowski dma = dma_map_single(dev, data, size, DMA_TO_DEVICE); 3463246a107SMaciej Fijalkowski if (dma_mapping_error(dev, dma)) 3473246a107SMaciej Fijalkowski goto dma_unmap; 3480891d6d4SKrzysztof Kazimierczak 3490891d6d4SKrzysztof Kazimierczak /* record length, and DMA address */ 3500891d6d4SKrzysztof Kazimierczak dma_unmap_len_set(tx_buf, len, size); 3510891d6d4SKrzysztof Kazimierczak dma_unmap_addr_set(tx_buf, dma, dma); 3520891d6d4SKrzysztof Kazimierczak 3530891d6d4SKrzysztof Kazimierczak tx_desc->buf_addr = cpu_to_le64(dma); 3543246a107SMaciej Fijalkowski tx_desc->cmd_type_offset_bsz = ice_build_ctob(0, 0, size, 0); 3553246a107SMaciej Fijalkowski tx_buf->raw_buf = data; 3563246a107SMaciej Fijalkowski 3573246a107SMaciej Fijalkowski ntu++; 3583246a107SMaciej Fijalkowski if (ntu == cnt) 3593246a107SMaciej Fijalkowski ntu = 0; 3603246a107SMaciej Fijalkowski 3613246a107SMaciej Fijalkowski if (frag == nr_frags) 3623246a107SMaciej Fijalkowski break; 3633246a107SMaciej Fijalkowski 3643246a107SMaciej Fijalkowski tx_desc = ICE_TX_DESC(xdp_ring, ntu); 3653246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntu]; 3663246a107SMaciej Fijalkowski 3673246a107SMaciej Fijalkowski data = skb_frag_address(&sinfo->frags[frag]); 3683246a107SMaciej Fijalkowski size = skb_frag_size(&sinfo->frags[frag]); 3693246a107SMaciej Fijalkowski frag++; 3703246a107SMaciej Fijalkowski } 3713246a107SMaciej Fijalkowski 3723246a107SMaciej Fijalkowski /* store info about bytecount and frag count in first desc */ 3733246a107SMaciej Fijalkowski tx_head->bytecount = xdp_get_buff_len(xdp); 3743246a107SMaciej Fijalkowski tx_head->nr_frags = nr_frags; 3753246a107SMaciej Fijalkowski 3763246a107SMaciej Fijalkowski /* update last descriptor from a frame with EOP */ 3773246a107SMaciej Fijalkowski tx_desc->cmd_type_offset_bsz |= 3783246a107SMaciej Fijalkowski cpu_to_le64(ICE_TX_DESC_CMD_EOP << ICE_TXD_QW1_CMD_S); 3790891d6d4SKrzysztof Kazimierczak 38059e92bfeSMaciej Fijalkowski xdp_ring->xdp_tx_active++; 3813246a107SMaciej Fijalkowski xdp_ring->next_to_use = ntu; 3829610bd98SMaciej Fijalkowski 3830891d6d4SKrzysztof Kazimierczak return ICE_XDP_TX; 3843246a107SMaciej Fijalkowski 3853246a107SMaciej Fijalkowski dma_unmap: 3863246a107SMaciej Fijalkowski for (;;) { 3873246a107SMaciej Fijalkowski tx_buf = &xdp_ring->tx_buf[ntu]; 3883246a107SMaciej Fijalkowski dma_unmap_page(dev, dma_unmap_addr(tx_buf, dma), 3893246a107SMaciej Fijalkowski dma_unmap_len(tx_buf, len), DMA_TO_DEVICE); 3903246a107SMaciej Fijalkowski dma_unmap_len_set(tx_buf, len, 0); 3913246a107SMaciej Fijalkowski if (tx_buf == tx_head) 3923246a107SMaciej Fijalkowski break; 3933246a107SMaciej Fijalkowski 3943246a107SMaciej Fijalkowski if (!ntu) 3953246a107SMaciej Fijalkowski ntu += cnt; 3963246a107SMaciej Fijalkowski ntu--; 3973246a107SMaciej Fijalkowski } 3983246a107SMaciej Fijalkowski return ICE_XDP_CONSUMED; 399*0bd939b6SAlexander Lobakin 400*0bd939b6SAlexander Lobakin busy: 401*0bd939b6SAlexander Lobakin xdp_ring->ring_stats->tx_stats.tx_busy++; 402*0bd939b6SAlexander Lobakin 403*0bd939b6SAlexander Lobakin return ICE_XDP_CONSUMED; 4043246a107SMaciej Fijalkowski } 4053246a107SMaciej Fijalkowski 4063246a107SMaciej Fijalkowski /** 4073246a107SMaciej Fijalkowski * ice_xmit_xdp_ring - submit frame to XDP ring for transmission 4083246a107SMaciej Fijalkowski * @xdpf: XDP frame that will be converted to XDP buff 4093246a107SMaciej Fijalkowski * @xdp_ring: XDP ring for transmission 4103246a107SMaciej Fijalkowski */ 4113246a107SMaciej Fijalkowski int ice_xmit_xdp_ring(struct xdp_frame *xdpf, struct ice_tx_ring *xdp_ring) 4123246a107SMaciej Fijalkowski { 4133246a107SMaciej Fijalkowski struct xdp_buff xdp; 4143246a107SMaciej Fijalkowski 4153246a107SMaciej Fijalkowski xdp_convert_frame_to_buff(xdpf, &xdp); 4163246a107SMaciej Fijalkowski return __ice_xmit_xdp_ring(&xdp, xdp_ring); 4170891d6d4SKrzysztof Kazimierczak } 4180891d6d4SKrzysztof Kazimierczak 4190891d6d4SKrzysztof Kazimierczak /** 4200891d6d4SKrzysztof Kazimierczak * ice_finalize_xdp_rx - Bump XDP Tx tail and/or flush redirect map 421eb087cd8SMaciej Fijalkowski * @xdp_ring: XDP ring 4220891d6d4SKrzysztof Kazimierczak * @xdp_res: Result of the receive batch 4230891d6d4SKrzysztof Kazimierczak * 4240891d6d4SKrzysztof Kazimierczak * This function bumps XDP Tx tail and/or flush redirect map, and 4250891d6d4SKrzysztof Kazimierczak * should be called when a batch of packets has been processed in the 4260891d6d4SKrzysztof Kazimierczak * napi loop. 4270891d6d4SKrzysztof Kazimierczak */ 4283246a107SMaciej Fijalkowski void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res, 4293246a107SMaciej Fijalkowski u32 first_idx) 4300891d6d4SKrzysztof Kazimierczak { 4313246a107SMaciej Fijalkowski struct ice_tx_buf *tx_buf = &xdp_ring->tx_buf[first_idx]; 4323246a107SMaciej Fijalkowski 4330891d6d4SKrzysztof Kazimierczak if (xdp_res & ICE_XDP_REDIR) 4340891d6d4SKrzysztof Kazimierczak xdp_do_flush_map(); 4350891d6d4SKrzysztof Kazimierczak 43622bf877eSMaciej Fijalkowski if (xdp_res & ICE_XDP_TX) { 43722bf877eSMaciej Fijalkowski if (static_branch_unlikely(&ice_xdp_locking_key)) 43822bf877eSMaciej Fijalkowski spin_lock(&xdp_ring->tx_lock); 4393246a107SMaciej Fijalkowski /* store index of descriptor with RS bit set in the first 4403246a107SMaciej Fijalkowski * ice_tx_buf of given NAPI batch 4413246a107SMaciej Fijalkowski */ 4423246a107SMaciej Fijalkowski tx_buf->rs_idx = ice_set_rs_bit(xdp_ring); 4430891d6d4SKrzysztof Kazimierczak ice_xdp_ring_update_tail(xdp_ring); 44422bf877eSMaciej Fijalkowski if (static_branch_unlikely(&ice_xdp_locking_key)) 44522bf877eSMaciej Fijalkowski spin_unlock(&xdp_ring->tx_lock); 44622bf877eSMaciej Fijalkowski } 4470891d6d4SKrzysztof Kazimierczak } 448