1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright(c) 2018 Intel Corporation. */
3
4 #ifndef I40E_TXRX_COMMON_
5 #define I40E_TXRX_COMMON_
6
7 int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring);
8 void i40e_clean_programming_status(struct i40e_ring *rx_ring, u64 qword0_raw,
9 u64 qword1);
10 void i40e_process_skb_fields(struct i40e_ring *rx_ring,
11 union i40e_rx_desc *rx_desc, struct sk_buff *skb);
12 void i40e_xdp_ring_update_tail(struct i40e_ring *xdp_ring);
13 void i40e_update_rx_stats(struct i40e_ring *rx_ring,
14 unsigned int total_rx_bytes,
15 unsigned int total_rx_packets);
16 void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res);
17 void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val);
18
19 #define I40E_XDP_PASS 0
20 #define I40E_XDP_CONSUMED BIT(0)
21 #define I40E_XDP_TX BIT(1)
22 #define I40E_XDP_REDIR BIT(2)
23 #define I40E_XDP_EXIT BIT(3)
24
25 /*
26 * build_ctob - Builds the Tx descriptor (cmd, offset and type) qword
27 */
build_ctob(u32 td_cmd,u32 td_offset,unsigned int size,u32 td_tag)28 static inline __le64 build_ctob(u32 td_cmd, u32 td_offset, unsigned int size,
29 u32 td_tag)
30 {
31 return cpu_to_le64(I40E_TX_DESC_DTYPE_DATA |
32 ((u64)td_cmd << I40E_TXD_QW1_CMD_SHIFT) |
33 ((u64)td_offset << I40E_TXD_QW1_OFFSET_SHIFT) |
34 ((u64)size << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) |
35 ((u64)td_tag << I40E_TXD_QW1_L2TAG1_SHIFT));
36 }
37
38 /**
39 * i40e_update_tx_stats - Update the egress statistics for the Tx ring
40 * @tx_ring: Tx ring to update
41 * @total_packets: total packets sent
42 * @total_bytes: total bytes sent
43 **/
i40e_update_tx_stats(struct i40e_ring * tx_ring,unsigned int total_packets,unsigned int total_bytes)44 static inline void i40e_update_tx_stats(struct i40e_ring *tx_ring,
45 unsigned int total_packets,
46 unsigned int total_bytes)
47 {
48 u64_stats_update_begin(&tx_ring->syncp);
49 tx_ring->stats.bytes += total_bytes;
50 tx_ring->stats.packets += total_packets;
51 u64_stats_update_end(&tx_ring->syncp);
52 tx_ring->q_vector->tx.total_bytes += total_bytes;
53 tx_ring->q_vector->tx.total_packets += total_packets;
54 }
55
56 #define WB_STRIDE 4
57
58 /**
59 * i40e_arm_wb - (Possibly) arms Tx write-back
60 * @tx_ring: Tx ring to update
61 * @vsi: the VSI
62 * @budget: the NAPI budget left
63 **/
i40e_arm_wb(struct i40e_ring * tx_ring,struct i40e_vsi * vsi,int budget)64 static inline void i40e_arm_wb(struct i40e_ring *tx_ring,
65 struct i40e_vsi *vsi,
66 int budget)
67 {
68 if (tx_ring->flags & I40E_TXR_FLAGS_WB_ON_ITR) {
69 /* check to see if there are < 4 descriptors
70 * waiting to be written back, then kick the hardware to force
71 * them to be written back in case we stay in NAPI.
72 * In this mode on X722 we do not enable Interrupt.
73 */
74 unsigned int j = i40e_get_tx_pending(tx_ring, false);
75
76 if (budget &&
77 ((j / WB_STRIDE) == 0) && j > 0 &&
78 !test_bit(__I40E_VSI_DOWN, vsi->state) &&
79 (I40E_DESC_UNUSED(tx_ring) != tx_ring->count))
80 tx_ring->arm_wb = true;
81 }
82 }
83
84 /**
85 * i40e_rx_is_programming_status - check for programming status descriptor
86 * @qword1: qword1 representing status_error_len in CPU ordering
87 *
88 * The value of in the descriptor length field indicate if this
89 * is a programming status descriptor for flow director or FCoE
90 * by the value of I40E_RX_PROG_STATUS_DESC_LENGTH, otherwise
91 * it is a packet descriptor.
92 **/
i40e_rx_is_programming_status(u64 qword1)93 static inline bool i40e_rx_is_programming_status(u64 qword1)
94 {
95 /* The Rx filter programming status and SPH bit occupy the same
96 * spot in the descriptor. Since we don't support packet split we
97 * can just reuse the bit as an indication that this is a
98 * programming status descriptor.
99 */
100 return qword1 & I40E_RXD_QW1_LENGTH_SPH_MASK;
101 }
102
103 void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring);
104 void i40e_xsk_clean_tx_ring(struct i40e_ring *tx_ring);
105 bool i40e_xsk_any_rx_ring_enabled(struct i40e_vsi *vsi);
106
107 #endif /* I40E_TXRX_COMMON_ */
108