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
ice_test_staterr(__le16 status_err_n,const u16 stat_err_bits)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
ice_build_ctob(u64 td_cmd,u64 td_offset,unsigned int size,u64 td_tag)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
ice_get_vlan_tag_from_rx_desc(union ice_32b_rx_flex_desc * rx_desc)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 */
ice_xdp_ring_update_tail(struct ice_tx_ring * xdp_ring)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