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