ceph/src/seastar/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 /*
  33  * upper_32_bits - return bits 32-63 of a number
  34  * @n: the number we're accessing
  35  *
  36  * A basic shift-right of a 64- or 32-bit quantity.  Use this to suppress
  37  * the "right shift count >= width of type" warning when that quantity is
  38  * 32-bits.
  39  */
  40 #define upper_32_bits(n) ((uint32_t)(((n) >> 16) >> 16))
  41
  42 /*
  43  * lower_32_bits - return bits 0-31 of a number
  44  * @n: the number we're accessing
  45  */
  46 #define lower_32_bits(n) ((uint32_t)(n))
  47
  48 #define ENETC_TXBD(BDR, i) (&(((struct enetc_tx_bd *)((BDR).bd_base))[i]))
  49 #define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i]))
  50
  51 struct enetc_swbd {
  52         struct rte_mbuf *buffer_addr;
  53 };
  54
  55 struct enetc_bdr {
  56         struct rte_eth_dev *ndev;
  57         struct rte_mempool *mb_pool;   /* mbuf pool to populate RX ring. */
  58         void *bd_base;                  /* points to Rx or Tx BD ring */
  59         union {
  60                 void *tcir;
  61                 void *rcir;
  62         };
  63         uint16_t index;
  64         int bd_count; /* # of BDs */
  65         int next_to_use;
  66         int next_to_clean;
  67         struct enetc_swbd *q_swbd;
  68         union {
  69                 void *tcisr; /* Tx */
  70                 int next_to_alloc; /* Rx */
  71         };
  72         uint8_t crc_len; /* 0 if CRC stripped, 4 otherwise */
  73 };
  74
  75 /*
  76  * Structure to store private data for each driver instance (for each port).
  77  */
  78 struct enetc_eth_adapter {
  79         struct rte_eth_dev *ndev;
  80         struct enetc_eth_hw hw;
  81 };
  82
  83 #define ENETC_DEV_PRIVATE(adapter) \
  84         ((struct enetc_eth_adapter *)adapter)
  85
  86 #define ENETC_DEV_PRIVATE_TO_HW(adapter) \
  87         (&((struct enetc_eth_adapter *)adapter)->hw)
  88
  89 #define ENETC_DEV_PRIVATE_TO_STATS(adapter) \
  90         (&((struct enetc_eth_adapter *)adapter)->stats)
  91
  92 #define ENETC_DEV_PRIVATE_TO_INTR(adapter) \
  93         (&((struct enetc_eth_adapter *)adapter)->intr)
  94
  95 /*
  96  * RX/TX ENETC function prototypes
  97  */
  98 uint16_t enetc_xmit_pkts(void *txq, struct rte_mbuf **tx_pkts,
  99                 uint16_t nb_pkts);
 100 uint16_t enetc_recv_pkts(void *rxq, struct rte_mbuf **rx_pkts,
 101                 uint16_t nb_pkts);
 102
 103
 104 int enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt);
 105
 106 static inline int
 107 enetc_bd_unused(struct enetc_bdr *bdr)
 108 {
 109         if (bdr->next_to_clean > bdr->next_to_use)
 110                 return bdr->next_to_clean - bdr->next_to_use - 1;
 111
 112         return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
 113 }
 114 #endif /* _ENETC_H_ */