root/drivers/net/ethernet/intel/i40e/i40e_txrx_common.h

INCLUDED FROM

DEFINITIONS

1. build_ctob
2. i40e_update_tx_stats
3. i40e_arm_wb

   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 void i40e_fd_handle_status(struct i40e_ring *rx_ring,
   8                            union i40e_rx_desc *rx_desc, u8 prog_id);
   9 int i40e_xmit_xdp_tx_ring(struct xdp_buff *xdp, struct i40e_ring *xdp_ring);
  10 struct i40e_rx_buffer *i40e_clean_programming_status(
  11         struct i40e_ring *rx_ring,
  12         union i40e_rx_desc *rx_desc,
  13         u64 qw);
  14 void i40e_process_skb_fields(struct i40e_ring *rx_ring,
  15                              union i40e_rx_desc *rx_desc, struct sk_buff *skb);
  16 void i40e_xdp_ring_update_tail(struct i40e_ring *xdp_ring);
  17 void i40e_update_rx_stats(struct i40e_ring *rx_ring,
  18                           unsigned int total_rx_bytes,
  19                           unsigned int total_rx_packets);
  20 void i40e_finalize_xdp_rx(struct i40e_ring *rx_ring, unsigned int xdp_res);
  21 void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val);
  22 
  23 #define I40E_XDP_PASS           0
  24 #define I40E_XDP_CONSUMED       BIT(0)
  25 #define I40E_XDP_TX             BIT(1)
  26 #define I40E_XDP_REDIR          BIT(2)
  27 
  28 /**
  29  * build_ctob - Builds the Tx descriptor (cmd, offset and type) qword
  30  **/
  31 static inline __le64 build_ctob(u32 td_cmd, u32 td_offset, unsigned int size,
  32                                 u32 td_tag)
  33 {
  34         return cpu_to_le64(I40E_TX_DESC_DTYPE_DATA |
  35                            ((u64)td_cmd  << I40E_TXD_QW1_CMD_SHIFT) |
  36                            ((u64)td_offset << I40E_TXD_QW1_OFFSET_SHIFT) |
  37                            ((u64)size  << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) |
  38                            ((u64)td_tag  << I40E_TXD_QW1_L2TAG1_SHIFT));
  39 }
  40 
  41 /**
  42  * i40e_update_tx_stats - Update the egress statistics for the Tx ring
  43  * @tx_ring: Tx ring to update
  44  * @total_packet: total packets sent
  45  * @total_bytes: total bytes sent
  46  **/
  47 static inline void i40e_update_tx_stats(struct i40e_ring *tx_ring,
  48                                         unsigned int total_packets,
  49                                         unsigned int total_bytes)
  50 {
  51         u64_stats_update_begin(&tx_ring->syncp);
  52         tx_ring->stats.bytes += total_bytes;
  53         tx_ring->stats.packets += total_packets;
  54         u64_stats_update_end(&tx_ring->syncp);
  55         tx_ring->q_vector->tx.total_bytes += total_bytes;
  56         tx_ring->q_vector->tx.total_packets += total_packets;
  57 }
  58 
  59 #define WB_STRIDE 4
  60 
  61 /**
  62  * i40e_arm_wb - (Possibly) arms Tx write-back
  63  * @tx_ring: Tx ring to update
  64  * @vsi: the VSI
  65  * @budget: the NAPI budget left
  66  **/
  67 static inline void i40e_arm_wb(struct i40e_ring *tx_ring,
  68                                struct i40e_vsi *vsi,
  69                                int budget)
  70 {
  71         if (tx_ring->flags & I40E_TXR_FLAGS_WB_ON_ITR) {
  72                 /* check to see if there are < 4 descriptors
  73                  * waiting to be written back, then kick the hardware to force
  74                  * them to be written back in case we stay in NAPI.
  75                  * In this mode on X722 we do not enable Interrupt.
  76                  */
  77                 unsigned int j = i40e_get_tx_pending(tx_ring, false);
  78 
  79                 if (budget &&
  80                     ((j / WB_STRIDE) == 0) && j > 0 &&
  81                     !test_bit(__I40E_VSI_DOWN, vsi->state) &&
  82                     (I40E_DESC_UNUSED(tx_ring) != tx_ring->count))
  83                         tx_ring->arm_wb = true;
  84         }
  85 }
  86 
  87 void i40e_xsk_clean_rx_ring(struct i40e_ring *rx_ring);
  88 void i40e_xsk_clean_tx_ring(struct i40e_ring *tx_ring);
  89 bool i40e_xsk_any_rx_ring_enabled(struct i40e_vsi *vsi);
  90 
  91 #endif /* I40E_TXRX_COMMON_ */