LXR dpdk/drivers/net/enetc/enetc.h

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright 2018-2019 NXP
   3 */
   4
   5#ifndef _ENETC_H_
   6#define _ENETC_H_
   7
   8#include <rte_time.h>
   9
  10#include "base/enetc_hw.h"
  11
  12#define PCI_VENDOR_ID_FREESCALE 0x1957
  13
  14/* Max TX rings per ENETC. */
  15#define MAX_TX_RINGS    2
  16
  17/* Max RX rings per ENTEC. */
  18#define MAX_RX_RINGS    1
  19
  20/* Max BD counts per Ring. */
  21#define MAX_BD_COUNT   64000
  22/* Min BD counts per Ring. */
  23#define MIN_BD_COUNT   32
  24/* BD ALIGN */
  25#define BD_ALIGN       8
  26
  27/* minimum frame size supported */
  28#define ENETC_MAC_MINFRM_SIZE   68
  29/* maximum frame size supported */
  30#define ENETC_MAC_MAXFRM_SIZE   9600
  31
  32/* The max frame size with default MTU */
  33#define ENETC_ETH_MAX_LEN (RTE_ETHER_MTU + \
  34                RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN)
  35
  36/*
  37 * upper_32_bits - return bits 32-63 of a number
  38 * @n: the number we're accessing
  39 *
  40 * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
  41 * the "right shift count >= width of type" warning when that quantity is
  42 * 32-bits.
  43 */
  44#define upper_32_bits(n) ((uint32_t)(((n) >> 16) >> 16))
  45
  46/*
  47 * lower_32_bits - return bits 0-31 of a number
  48 * @n: the number we're accessing
  49 */
  50#define lower_32_bits(n) ((uint32_t)(n))
  51
  52#define ENETC_TXBD(BDR, i) (&(((struct enetc_tx_bd *)((BDR).bd_base))[i]))
  53#define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i]))
  54
  55struct enetc_swbd {
  56        struct rte_mbuf *buffer_addr;
  57};
  58
  59struct enetc_bdr {
  60        void *bd_base;                  /* points to Rx or Tx BD ring */
  61        struct enetc_swbd *q_swbd;
  62        union {
  63                void *tcir;
  64                void *rcir;
  65        };
  66        int bd_count; /* # of BDs */
  67        int next_to_use;
  68        int next_to_clean;
  69        uint16_t index;
  70        uint8_t crc_len; /* 0 if CRC stripped, 4 otherwise */
  71        union {
  72                void *tcisr; /* Tx */
  73                int next_to_alloc; /* Rx */
  74        };
  75        struct rte_mempool *mb_pool;   /* mbuf pool to populate RX ring. */
  76        struct rte_eth_dev *ndev;
  77};
  78
  79/*
  80 * Structure to store private data for each driver instance (for each port).
  81 */
  82struct enetc_eth_adapter {
  83        struct rte_eth_dev *ndev;
  84        struct enetc_eth_hw hw;
  85};
  86
  87#define ENETC_DEV_PRIVATE(adapter) \
  88        ((struct enetc_eth_adapter *)adapter)
  89
  90#define ENETC_DEV_PRIVATE_TO_HW(adapter) \
  91        (&((struct enetc_eth_adapter *)adapter)->hw)
  92
  93#define ENETC_DEV_PRIVATE_TO_STATS(adapter) \
  94        (&((struct enetc_eth_adapter *)adapter)->stats)
  95
  96#define ENETC_DEV_PRIVATE_TO_INTR(adapter) \
  97        (&((struct enetc_eth_adapter *)adapter)->intr)
  98
  99/*
 100 * RX/TX ENETC function prototypes
 101 */
 102uint16_t enetc_xmit_pkts(void *txq, struct rte_mbuf **tx_pkts,
 103                uint16_t nb_pkts);
 104uint16_t enetc_recv_pkts(void *rxq, struct rte_mbuf **rx_pkts,
 105                uint16_t nb_pkts);
 106
 107
 108int enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt);
 109
 110static inline int
 111enetc_bd_unused(struct enetc_bdr *bdr)
 112{
 113        if (bdr->next_to_clean > bdr->next_to_use)
 114                return bdr->next_to_clean - bdr->next_to_use - 1;
 115
 116        return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
 117}
 118#endif /* _ENETC_H_ */
 119