1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (c) 2019, Intel Corporation. */ 3 4 #ifndef _ICE_TXRX_LIB_H_ 5 #define _ICE_TXRX_LIB_H_ 6 #include "ice.h" 7 8 /** 9 * ice_test_staterr - tests bits in Rx descriptor status and error fields 10 * @status_err_n: Rx descriptor status_error0 or status_error1 bits 11 * @stat_err_bits: value to mask 12 * 13 * This function does some fast chicanery in order to return the 14 * value of the mask which is really only used for boolean tests. 15 * The status_error_len doesn't need to be shifted because it begins 16 * at offset zero. 17 */ 18 static inline bool 19 ice_test_staterr(__le16 status_err_n, const u16 stat_err_bits) 20 { 21 return !!(status_err_n & cpu_to_le16(stat_err_bits)); 22 } 23 24 static inline __le64 25 ice_build_ctob(u64 td_cmd, u64 td_offset, unsigned int size, u64 td_tag) 26 { 27 return cpu_to_le64(ICE_TX_DESC_DTYPE_DATA | 28 (td_cmd << ICE_TXD_QW1_CMD_S) | 29 (td_offset << ICE_TXD_QW1_OFFSET_S) | 30 ((u64)size << ICE_TXD_QW1_TX_BUF_SZ_S) | 31 (td_tag << ICE_TXD_QW1_L2TAG1_S)); 32 } 33 34 /** 35 * ice_get_vlan_tag_from_rx_desc - get VLAN from Rx flex descriptor 36 * @rx_desc: Rx 32b flex descriptor with RXDID=2 37 * 38 * The OS and current PF implementation only support stripping a single VLAN tag 39 * at a time, so there should only ever be 0 or 1 tags in the l2tag* fields. If 40 * one is found return the tag, else return 0 to mean no VLAN tag was found. 41 */ 42 static inline u16 43 ice_get_vlan_tag_from_rx_desc(union ice_32b_rx_flex_desc *rx_desc) 44 { 45 u16 stat_err_bits; 46 47 stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS0_L2TAG1P_S); 48 if (ice_test_staterr(rx_desc->wb.status_error0, stat_err_bits)) 49 return le16_to_cpu(rx_desc->wb.l2tag1); 50 51 stat_err_bits = BIT(ICE_RX_FLEX_DESC_STATUS1_L2TAG2P_S); 52 if (ice_test_staterr(rx_desc->wb.status_error1, stat_err_bits)) 53 return le16_to_cpu(rx_desc->wb.l2tag2_2nd); 54 55 return 0; 56 } 57 58 /** 59 * ice_xdp_ring_update_tail - Updates the XDP Tx ring tail register 60 * @xdp_ring: XDP Tx ring 61 * 62 * This function updates the XDP Tx ring tail register. 63 */ 64 static inline void ice_xdp_ring_update_tail(struct ice_tx_ring *xdp_ring) 65 { 66 /* Force memory writes to complete before letting h/w 67 * know there are new descriptors to fetch. 68 */ 69 wmb(); 70 writel_relaxed(xdp_ring->next_to_use, xdp_ring->tail); 71 } 72 73 void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res); 74 int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_tx_ring *xdp_ring); 75 int ice_xmit_xdp_ring(void *data, u16 size, struct ice_tx_ring *xdp_ring); 76 void ice_release_rx_desc(struct ice_rx_ring *rx_ring, u16 val); 77 void 78 ice_process_skb_fields(struct ice_rx_ring *rx_ring, 79 union ice_32b_rx_flex_desc *rx_desc, 80 struct sk_buff *skb, u16 ptype); 81 void 82 ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag); 83 #endif /* !_ICE_TXRX_LIB_H_ */ 84