247 lines
6.1 KiB
C
247 lines
6.1 KiB
C
/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
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/* Copyright 2017-2019 NXP */
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#include <linux/timer.h>
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/dma-mapping.h>
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#include <linux/skbuff.h>
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#include <linux/ethtool.h>
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#include <linux/if_vlan.h>
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#include <linux/phy.h>
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#include "enetc_hw.h"
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#define ENETC_MAC_MAXFRM_SIZE 9600
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#define ENETC_MAX_MTU (ENETC_MAC_MAXFRM_SIZE - \
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(ETH_FCS_LEN + ETH_HLEN + VLAN_HLEN))
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struct enetc_tx_swbd {
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struct sk_buff *skb;
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dma_addr_t dma;
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u16 len;
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u8 is_dma_page:1;
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u8 check_wb:1;
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u8 do_tstamp:1;
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};
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#define ENETC_RX_MAXFRM_SIZE ENETC_MAC_MAXFRM_SIZE
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#define ENETC_RXB_TRUESIZE 2048 /* PAGE_SIZE >> 1 */
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#define ENETC_RXB_PAD NET_SKB_PAD /* add extra space if needed */
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#define ENETC_RXB_DMA_SIZE \
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(SKB_WITH_OVERHEAD(ENETC_RXB_TRUESIZE) - ENETC_RXB_PAD)
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struct enetc_rx_swbd {
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dma_addr_t dma;
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struct page *page;
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u16 page_offset;
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};
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struct enetc_ring_stats {
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unsigned int packets;
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unsigned int bytes;
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unsigned int rx_alloc_errs;
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};
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#define ENETC_BDR_DEFAULT_SIZE 1024
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#define ENETC_DEFAULT_TX_WORK 256
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struct enetc_bdr {
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struct device *dev; /* for DMA mapping */
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struct net_device *ndev;
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void *bd_base; /* points to Rx or Tx BD ring */
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union {
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void __iomem *tpir;
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void __iomem *rcir;
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};
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u16 index;
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int bd_count; /* # of BDs */
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int next_to_use;
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int next_to_clean;
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union {
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struct enetc_tx_swbd *tx_swbd;
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struct enetc_rx_swbd *rx_swbd;
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};
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union {
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void __iomem *tcir; /* Tx */
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int next_to_alloc; /* Rx */
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};
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void __iomem *idr; /* Interrupt Detect Register pointer */
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struct enetc_ring_stats stats;
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dma_addr_t bd_dma_base;
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} ____cacheline_aligned_in_smp;
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static inline void enetc_bdr_idx_inc(struct enetc_bdr *bdr, int *i)
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{
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if (unlikely(++*i == bdr->bd_count))
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*i = 0;
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}
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static inline int enetc_bd_unused(struct enetc_bdr *bdr)
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{
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if (bdr->next_to_clean > bdr->next_to_use)
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return bdr->next_to_clean - bdr->next_to_use - 1;
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return bdr->bd_count + bdr->next_to_clean - bdr->next_to_use - 1;
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}
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/* Control BD ring */
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#define ENETC_CBDR_DEFAULT_SIZE 64
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struct enetc_cbdr {
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void *bd_base; /* points to Rx or Tx BD ring */
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void __iomem *pir;
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void __iomem *cir;
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int bd_count; /* # of BDs */
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int next_to_use;
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int next_to_clean;
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dma_addr_t bd_dma_base;
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};
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#define ENETC_TXBD(BDR, i) (&(((union enetc_tx_bd *)((BDR).bd_base))[i]))
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#define ENETC_RXBD(BDR, i) (&(((union enetc_rx_bd *)((BDR).bd_base))[i]))
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struct enetc_msg_swbd {
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void *vaddr;
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dma_addr_t dma;
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int size;
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};
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#define ENETC_REV1 0x1
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enum enetc_errata {
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ENETC_ERR_TXCSUM = BIT(0),
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ENETC_ERR_VLAN_ISOL = BIT(1),
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ENETC_ERR_UCMCSWP = BIT(2),
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};
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/* PCI IEP device data */
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struct enetc_si {
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struct pci_dev *pdev;
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struct enetc_hw hw;
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enum enetc_errata errata;
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struct net_device *ndev; /* back ref. */
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struct enetc_cbdr cbd_ring;
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int num_rx_rings; /* how many rings are available in the SI */
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int num_tx_rings;
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int num_fs_entries;
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int num_rss; /* number of RSS buckets */
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unsigned short pad;
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};
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#define ENETC_SI_ALIGN 32
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static inline void *enetc_si_priv(const struct enetc_si *si)
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{
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return (char *)si + ALIGN(sizeof(struct enetc_si), ENETC_SI_ALIGN);
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}
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static inline bool enetc_si_is_pf(struct enetc_si *si)
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{
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return !!(si->hw.port);
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}
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#define ENETC_MAX_NUM_TXQS 8
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#define ENETC_INT_NAME_MAX (IFNAMSIZ + 8)
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struct enetc_int_vector {
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void __iomem *rbier;
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void __iomem *tbier_base;
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unsigned long tx_rings_map;
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int count_tx_rings;
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struct napi_struct napi;
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char name[ENETC_INT_NAME_MAX];
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struct enetc_bdr rx_ring ____cacheline_aligned_in_smp;
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struct enetc_bdr tx_ring[0];
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};
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struct enetc_cls_rule {
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struct ethtool_rx_flow_spec fs;
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int used;
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};
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#define ENETC_MAX_BDR_INT 2 /* fixed to max # of available cpus */
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/* TODO: more hardware offloads */
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enum enetc_active_offloads {
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ENETC_F_RX_TSTAMP = BIT(0),
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ENETC_F_TX_TSTAMP = BIT(1),
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};
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struct enetc_ndev_priv {
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struct net_device *ndev;
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struct device *dev; /* dma-mapping device */
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struct enetc_si *si;
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int bdr_int_num; /* number of Rx/Tx ring interrupts */
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struct enetc_int_vector *int_vector[ENETC_MAX_BDR_INT];
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u16 num_rx_rings, num_tx_rings;
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u16 rx_bd_count, tx_bd_count;
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u16 msg_enable;
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int active_offloads;
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struct enetc_bdr *tx_ring[16];
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struct enetc_bdr *rx_ring[16];
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struct enetc_cls_rule *cls_rules;
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struct device_node *phy_node;
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phy_interface_t if_mode;
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};
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/* Messaging */
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/* VF-PF set primary MAC address message format */
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struct enetc_msg_cmd_set_primary_mac {
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struct enetc_msg_cmd_header header;
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struct sockaddr mac;
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};
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#define ENETC_CBD(R, i) (&(((struct enetc_cbd *)((R).bd_base))[i]))
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#define ENETC_CBDR_TIMEOUT 1000 /* usecs */
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/* PTP driver exports */
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extern int enetc_phc_index;
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/* SI common */
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int enetc_pci_probe(struct pci_dev *pdev, const char *name, int sizeof_priv);
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void enetc_pci_remove(struct pci_dev *pdev);
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int enetc_alloc_msix(struct enetc_ndev_priv *priv);
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void enetc_free_msix(struct enetc_ndev_priv *priv);
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void enetc_get_si_caps(struct enetc_si *si);
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void enetc_init_si_rings_params(struct enetc_ndev_priv *priv);
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int enetc_alloc_si_resources(struct enetc_ndev_priv *priv);
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void enetc_free_si_resources(struct enetc_ndev_priv *priv);
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int enetc_open(struct net_device *ndev);
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int enetc_close(struct net_device *ndev);
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netdev_tx_t enetc_xmit(struct sk_buff *skb, struct net_device *ndev);
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struct net_device_stats *enetc_get_stats(struct net_device *ndev);
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int enetc_set_features(struct net_device *ndev,
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netdev_features_t features);
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int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd);
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int enetc_setup_tc(struct net_device *ndev, enum tc_setup_type type,
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void *type_data);
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/* ethtool */
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void enetc_set_ethtool_ops(struct net_device *ndev);
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/* control buffer descriptor ring (CBDR) */
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int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
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char *mac_addr, int si_map);
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int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
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int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
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int index);
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void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
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int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
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int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);
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