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