drivers/net/ethernet/intel/ice/ice_txrx_lib.h

   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  * @rx_desc: pointer to receive descriptor (in le64 format)
  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(union ice_32b_rx_flex_desc *rx_desc, const u16 stat_err_bits)
  20 {
  21         return !!(rx_desc->wb.status_error0 & cpu_to_le16(stat_err_bits));
  22 }
  23
  24 static inline __le64
  25 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_xdp_ring_update_tail - Updates the XDP Tx ring tail register
  36  * @xdp_ring: XDP Tx ring
  37  *
  38  * This function updates the XDP Tx ring tail register.
  39  */
  40 static inline void ice_xdp_ring_update_tail(struct ice_ring *xdp_ring)
  41 {
  42         /* Force memory writes to complete before letting h/w
  43          * know there are new descriptors to fetch.
  44          */
  45         wmb();
  46         writel_relaxed(xdp_ring->next_to_use, xdp_ring->tail);
  47 }
  48
  49 void ice_finalize_xdp_rx(struct ice_ring *rx_ring, unsigned int xdp_res);
  50 int ice_xmit_xdp_buff(struct xdp_buff *xdp, struct ice_ring *xdp_ring);
  51 int ice_xmit_xdp_ring(void *data, u16 size, struct ice_ring *xdp_ring);
  52 void ice_release_rx_desc(struct ice_ring *rx_ring, u32 val);
  53 void
  54 ice_process_skb_fields(struct ice_ring *rx_ring,
  55                        union ice_32b_rx_flex_desc *rx_desc,
  56                        struct sk_buff *skb, u8 ptype);
  57 void
  58 ice_receive_skb(struct ice_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag);
  59 #endif /* !_ICE_TXRX_LIB_H_ */