/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c)  2018 Intel Corporation */

#ifndef _IGC_H_
#define _IGC_H_

#include <linux/kobject.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/ethtool.h>
#include <linux/sctp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/timecounter.h>
#include <linux/net_tstamp.h>
#include <linux/bitfield.h>
#include <linux/hrtimer.h>
#include <net/xdp.h>

#include "igc_hw.h"

void igc_ethtool_set_ops(struct net_device *);

/* Transmit and receive queues */
#define IGC_MAX_RX_QUEUES               4
#define IGC_MAX_TX_QUEUES               4

#define MAX_Q_VECTORS                   8
#define MAX_STD_JUMBO_FRAME_SIZE        9216

#define MAX_ETYPE_FILTER                8
#define IGC_RETA_SIZE                   128

/* SDP support */
#define IGC_N_EXTTS     2
#define IGC_N_PEROUT    2
#define IGC_N_SDP       4

#define MAX_FLEX_FILTER                 32

#define IGC_MAX_TX_TSTAMP_REGS          4

struct igc_fpe_t {
        struct ethtool_mmsv mmsv;
        u32 tx_min_frag_size;
        bool tx_enabled;
};

enum igc_mac_filter_type {
        IGC_MAC_FILTER_TYPE_DST = 0,
        IGC_MAC_FILTER_TYPE_SRC
};

struct igc_tx_queue_stats {
        u64 packets;
        u64 bytes;
        u64 restart_queue;
        u64 restart_queue2;
};

struct igc_rx_queue_stats {
        u64 packets;
        u64 bytes;
        u64 drops;
        u64 csum_err;
        u64 alloc_failed;
};

struct igc_rx_packet_stats {
        u64 ipv4_packets;      /* IPv4 headers processed */
        u64 ipv4e_packets;     /* IPv4E headers with extensions processed */
        u64 ipv6_packets;      /* IPv6 headers processed */
        u64 ipv6e_packets;     /* IPv6E headers with extensions processed */
        u64 tcp_packets;       /* TCP headers processed */
        u64 udp_packets;       /* UDP headers processed */
        u64 sctp_packets;      /* SCTP headers processed */
        u64 nfs_packets;       /* NFS headers processe */
        u64 other_packets;
};

enum igc_tx_buffer_type {
        IGC_TX_BUFFER_TYPE_SKB,
        IGC_TX_BUFFER_TYPE_XDP,
        IGC_TX_BUFFER_TYPE_XSK,
};

/* wrapper around a pointer to a socket buffer,
 * so a DMA handle can be stored along with the buffer
 */
struct igc_tx_buffer {
        union igc_adv_tx_desc *next_to_watch;
        unsigned long time_stamp;
        enum igc_tx_buffer_type type;
        union {
                struct sk_buff *skb;
                struct xdp_frame *xdpf;
        };
        unsigned int bytecount;
        u16 gso_segs;
        __be16 protocol;

        DEFINE_DMA_UNMAP_ADDR(dma);
        DEFINE_DMA_UNMAP_LEN(len);
        u32 tx_flags;
        bool xsk_pending_ts;
};

struct igc_tx_timestamp_request {
        union {                /* reference to the packet being timestamped */
                struct sk_buff *skb;
                struct igc_tx_buffer *xsk_tx_buffer;
        };
        enum igc_tx_buffer_type buffer_type;
        unsigned long start;   /* when the tstamp request started (jiffies) */
        u32 mask;              /* _TSYNCTXCTL_TXTT_{X} bit for this request */
        u32 regl;              /* which TXSTMPL_{X} register should be used */
        u32 regh;              /* which TXSTMPH_{X} register should be used */
        u32 flags;             /* flags that should be added to the tx_buffer */
        u8 xsk_queue_index;    /* Tx queue which requesting timestamp */
        struct xsk_tx_metadata_compl xsk_meta;  /* ref to xsk Tx metadata */
};

struct igc_inline_rx_tstamps {
        /* Timestamps are saved in little endian at the beginning of the packet
         * buffer following the layout:
         *
         * DWORD: | 0              | 1              | 2              | 3              |
         * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH |
         *
         * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds
         * part of the timestamp.
         *
         */
        __le32 timer1[2];
        __le32 timer0[2];
};

struct igc_ring_container {
        struct igc_ring *ring;          /* pointer to linked list of rings */
        unsigned int total_bytes;       /* total bytes processed this int */
        unsigned int total_packets;     /* total packets processed this int */
        u16 work_limit;                 /* total work allowed per interrupt */
        u8 count;                       /* total number of rings in vector */
        u8 itr;                         /* current ITR setting for ring */
};

struct igc_ring {
        struct igc_q_vector *q_vector;  /* backlink to q_vector */
        struct net_device *netdev;      /* back pointer to net_device */
        struct device *dev;             /* device for dma mapping */
        union {                         /* array of buffer info structs */
                struct igc_tx_buffer *tx_buffer_info;
                struct igc_rx_buffer *rx_buffer_info;
        };
        void *desc;                     /* descriptor ring memory */
        unsigned long flags;            /* ring specific flags */
        void __iomem *tail;             /* pointer to ring tail register */
        dma_addr_t dma;                 /* phys address of the ring */
        unsigned int size;              /* length of desc. ring in bytes */

        u16 count;                      /* number of desc. in the ring */
        u8 queue_index;                 /* logical index of the ring*/
        u8 reg_idx;                     /* physical index of the ring */
        bool launchtime_enable;         /* true if LaunchTime is enabled */
        ktime_t last_tx_cycle;          /* end of the cycle with a launchtime transmission */
        ktime_t last_ff_cycle;          /* Last cycle with an active first flag */
        bool preemptible;               /* True if preemptible queue, false if express queue */

        u32 start_time;
        u32 end_time;
        u32 max_sdu;
        bool oper_gate_closed;          /* Operating gate. True if the TX Queue is closed */
        bool admin_gate_closed;         /* Future gate. True if the TX Queue will be closed */

        /* CBS parameters */
        bool cbs_enable;                /* indicates if CBS is enabled */
        s32 idleslope;                  /* idleSlope in kbps */
        s32 sendslope;                  /* sendSlope in kbps */
        s32 hicredit;                   /* hiCredit in bytes */
        s32 locredit;                   /* loCredit in bytes */

        /* everything past this point are written often */
        u16 next_to_clean;
        u16 next_to_use;
        u16 next_to_alloc;

        union {
                /* TX */
                struct {
                        struct igc_tx_queue_stats tx_stats;
                        struct u64_stats_sync tx_syncp;
                        struct u64_stats_sync tx_syncp2;
                };
                /* RX */
                struct {
                        struct igc_rx_queue_stats rx_stats;
                        struct igc_rx_packet_stats pkt_stats;
                        struct u64_stats_sync rx_syncp;
                        struct sk_buff *skb;
                };
        };

        struct xdp_rxq_info xdp_rxq;
        struct xsk_buff_pool *xsk_pool;
} ____cacheline_internodealigned_in_smp;

/* Board specific private data structure */
struct igc_adapter {
        struct net_device *netdev;

        struct ethtool_keee eee;

        unsigned long state;
        unsigned int flags;
        unsigned int num_q_vectors;

        struct msix_entry *msix_entries;

        /* TX */
        u16 tx_work_limit;
        u32 tx_timeout_count;
        int num_tx_queues;
        struct igc_ring *tx_ring[IGC_MAX_TX_QUEUES];

        /* RX */
        int num_rx_queues;
        struct igc_ring *rx_ring[IGC_MAX_RX_QUEUES];

        struct timer_list watchdog_timer;
        struct timer_list dma_err_timer;
        struct timer_list phy_info_timer;
        struct hrtimer hrtimer;

        u32 wol;
        u32 en_mng_pt;
        u16 link_speed;
        u16 link_duplex;

        u8 port_num;

        u8 __iomem *io_addr;
        /* Interrupt Throttle Rate */
        u32 rx_itr_setting;
        u32 tx_itr_setting;

        struct work_struct reset_task;
        struct work_struct watchdog_task;
        struct work_struct dma_err_task;
        bool fc_autoneg;

        u8 tx_timeout_factor;

        int msg_enable;
        u32 max_frame_size;
        u32 min_frame_size;

        int tc_setup_type;
        ktime_t base_time;
        ktime_t cycle_time;
        bool taprio_offload_enable;
        u32 qbv_config_change_errors;
        bool qbv_transition;
        unsigned int qbv_count;
        /* Access to oper_gate_closed, admin_gate_closed and qbv_transition
         * are protected by the qbv_tx_lock.
         */
        spinlock_t qbv_tx_lock;

        bool strict_priority_enable;
        u8 num_tc;
        u16 queue_per_tc[IGC_MAX_TX_QUEUES];

        /* OS defined structs */
        struct pci_dev *pdev;
        /* lock for statistics */
        spinlock_t stats64_lock;
        struct rtnl_link_stats64 stats64;

        /* structs defined in igc_hw.h */
        struct igc_hw hw;
        struct igc_hw_stats stats;

        struct igc_q_vector *q_vector[MAX_Q_VECTORS];
        u32 eims_enable_mask;
        u32 eims_other;

        u16 tx_ring_count;
        u16 rx_ring_count;

        u32 tx_hwtstamp_timeouts;
        u32 tx_hwtstamp_skipped;
        u32 rx_hwtstamp_cleared;

        u32 rss_queues;
        u32 rss_indir_tbl_init;

        /* Any access to elements in nfc_rule_list is protected by the
         * nfc_rule_lock.
         */
        struct mutex nfc_rule_lock;
        struct list_head nfc_rule_list;
        unsigned int nfc_rule_count;

        u8 rss_indir_tbl[IGC_RETA_SIZE];

        unsigned long link_check_timeout;
        struct igc_info ei;

        u32 test_icr;

        struct ptp_clock *ptp_clock;
        struct ptp_clock_info ptp_caps;
        /* Access to ptp_tx_skb and ptp_tx_start are protected by the
         * ptp_tx_lock.
         */
        spinlock_t ptp_tx_lock;
        struct igc_tx_timestamp_request tx_tstamp[IGC_MAX_TX_TSTAMP_REGS];
        struct kernel_hwtstamp_config tstamp_config;
        unsigned int ptp_flags;
        /* System time value lock */
        spinlock_t tmreg_lock;
        /* Free-running timer lock */
        spinlock_t free_timer_lock;
        struct cyclecounter cc;
        struct timecounter tc;
        struct timespec64 prev_ptp_time; /* Pre-reset PTP clock */
        ktime_t ptp_reset_start; /* Reset time in clock mono */
        struct system_time_snapshot snapshot;
        struct mutex ptm_lock; /* Only allow one PTM transaction at a time */

        char fw_version[32];

        struct bpf_prog *xdp_prog;

        bool pps_sys_wrap_on;

        struct ptp_pin_desc sdp_config[IGC_N_SDP];
        struct {
                struct timespec64 start;
                struct timespec64 period;
        } perout[IGC_N_PEROUT];

        struct igc_fpe_t fpe;

        /* LEDs */
        struct mutex led_mutex;
        struct igc_led_classdev *leds;
        bool leds_available;
};

void igc_up(struct igc_adapter *adapter);
void igc_down(struct igc_adapter *adapter);
int igc_open(struct net_device *netdev);
int igc_close(struct net_device *netdev);
int igc_setup_tx_resources(struct igc_ring *ring);
int igc_setup_rx_resources(struct igc_ring *ring);
void igc_free_tx_resources(struct igc_ring *ring);
void igc_free_rx_resources(struct igc_ring *ring);
unsigned int igc_get_max_rss_queues(struct igc_adapter *adapter);
void igc_set_flag_queue_pairs(struct igc_adapter *adapter,
                              const u32 max_rss_queues);
int igc_reinit_queues(struct igc_adapter *adapter);
void igc_write_rss_indir_tbl(struct igc_adapter *adapter);
bool igc_has_link(struct igc_adapter *adapter);
void igc_reset(struct igc_adapter *adapter);
void igc_update_stats(struct igc_adapter *adapter);
void igc_disable_rx_ring(struct igc_ring *ring);
void igc_enable_rx_ring(struct igc_ring *ring);
void igc_disable_tx_ring(struct igc_ring *ring);
void igc_enable_tx_ring(struct igc_ring *ring);
int igc_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags);

/* AF_XDP TX metadata operations */
extern const struct xsk_tx_metadata_ops igc_xsk_tx_metadata_ops;

/* igc_dump declarations */
void igc_rings_dump(struct igc_adapter *adapter);
void igc_regs_dump(struct igc_adapter *adapter);

extern char igc_driver_name[];

#define IGC_REGS_LEN                    740

/* flags controlling PTP/1588 function */
#define IGC_PTP_ENABLED         BIT(0)

/* Flags definitions */
#define IGC_FLAG_HAS_MSI                BIT(0)
#define IGC_FLAG_QUEUE_PAIRS            BIT(3)
#define IGC_FLAG_DMAC                   BIT(4)
#define IGC_FLAG_PTP                    BIT(8)
#define IGC_FLAG_WOL_SUPPORTED          BIT(8)
#define IGC_FLAG_NEED_LINK_UPDATE       BIT(9)
#define IGC_FLAG_HAS_MSIX               BIT(13)
#define IGC_FLAG_EEE                    BIT(14)
#define IGC_FLAG_VLAN_PROMISC           BIT(15)
#define IGC_FLAG_RX_LEGACY              BIT(16)
#define IGC_FLAG_TSN_QBV_ENABLED        BIT(17)
#define IGC_FLAG_TSN_QAV_ENABLED        BIT(18)
#define IGC_FLAG_TSN_PREEMPT_ENABLED    BIT(19)
#define IGC_FLAG_TSN_REVERSE_TXQ_PRIO   BIT(20)

#define IGC_FLAG_TSN_ANY_ENABLED                                \
        (IGC_FLAG_TSN_QBV_ENABLED | IGC_FLAG_TSN_QAV_ENABLED |  \
         IGC_FLAG_TSN_PREEMPT_ENABLED)

#define IGC_FLAG_RSS_FIELD_IPV4_UDP     BIT(6)
#define IGC_FLAG_RSS_FIELD_IPV6_UDP     BIT(7)

/* RX-desc Write-Back format RSS Type's */
enum igc_rss_type_num {
        IGC_RSS_TYPE_NO_HASH            = 0,
        IGC_RSS_TYPE_HASH_TCP_IPV4      = 1,
        IGC_RSS_TYPE_HASH_IPV4          = 2,
        IGC_RSS_TYPE_HASH_TCP_IPV6      = 3,
        IGC_RSS_TYPE_HASH_IPV6_EX       = 4,
        IGC_RSS_TYPE_HASH_IPV6          = 5,
        IGC_RSS_TYPE_HASH_TCP_IPV6_EX   = 6,
        IGC_RSS_TYPE_HASH_UDP_IPV4      = 7,
        IGC_RSS_TYPE_HASH_UDP_IPV6      = 8,
        IGC_RSS_TYPE_HASH_UDP_IPV6_EX   = 9,
        IGC_RSS_TYPE_MAX                = 10,
};
#define IGC_RSS_TYPE_MAX_TABLE          16
#define IGC_RSS_TYPE_MASK               GENMASK(3,0) /* 4-bits (3:0) = mask 0x0F */

/* igc_rss_type - Rx descriptor RSS type field */
static inline u32 igc_rss_type(const union igc_adv_rx_desc *rx_desc)
{
        /* RSS Type 4-bits (3:0) number: 0-9 (above 9 is reserved)
         * Accessing the same bits via u16 (wb.lower.lo_dword.hs_rss.pkt_info)
         * is slightly slower than via u32 (wb.lower.lo_dword.data)
         */
        return le32_get_bits(rx_desc->wb.lower.lo_dword.data, IGC_RSS_TYPE_MASK);
}

/* Interrupt defines */
#define IGC_START_ITR                   648 /* ~6000 ints/sec */
#define IGC_4K_ITR                      980
#define IGC_20K_ITR                     196
#define IGC_70K_ITR                     56

#define IGC_DEFAULT_ITR         3 /* dynamic */
#define IGC_MAX_ITR_USECS       10000
#define IGC_MIN_ITR_USECS       10
#define NON_Q_VECTORS           1
#define MAX_MSIX_ENTRIES        10

/* TX/RX descriptor defines */
#define IGC_DEFAULT_TXD         256
#define IGC_DEFAULT_TX_WORK     128
#define IGC_MIN_TXD             64
#define IGC_MAX_TXD             4096

#define IGC_DEFAULT_RXD         256
#define IGC_MIN_RXD             64
#define IGC_MAX_RXD             4096

/* Supported Rx Buffer Sizes */
#define IGC_RXBUFFER_256                256
#define IGC_RXBUFFER_2048               2048
#define IGC_RXBUFFER_3072               3072

#define AUTO_ALL_MODES          0
#define IGC_RX_HDR_LEN                  IGC_RXBUFFER_256

/* Transmit and receive latency (for PTP timestamps) */
#define IGC_I225_TX_LATENCY_10          240
#define IGC_I225_TX_LATENCY_100         58
#define IGC_I225_TX_LATENCY_1000        80
#define IGC_I225_TX_LATENCY_2500        1325
#define IGC_I225_RX_LATENCY_10          6450
#define IGC_I225_RX_LATENCY_100         185
#define IGC_I225_RX_LATENCY_1000        300
#define IGC_I225_RX_LATENCY_2500        1485

/* RX and TX descriptor control thresholds.
 * PTHRESH - MAC will consider prefetch if it has fewer than this number of
 *           descriptors available in its onboard memory.
 *           Setting this to 0 disables RX descriptor prefetch.
 * HTHRESH - MAC will only prefetch if there are at least this many descriptors
 *           available in host memory.
 *           If PTHRESH is 0, this should also be 0.
 * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
 *           descriptors until either it has this many to write back, or the
 *           ITR timer expires.
 */
#define IGC_RXDCTL_PTHRESH              8
#define IGC_RXDCTL_HTHRESH              8
#define IGC_RXDCTL_WTHRESH              4
/* Ena specific Rx Queue */
#define IGC_RXDCTL_QUEUE_ENABLE         0x02000000
/* Receive Software Flush */
#define IGC_RXDCTL_SWFLUSH              0x04000000

#define IGC_TXDCTL_PTHRESH_MASK         GENMASK(4, 0)
#define IGC_TXDCTL_HTHRESH_MASK         GENMASK(12, 8)
#define IGC_TXDCTL_WTHRESH_MASK         GENMASK(20, 16)
#define IGC_TXDCTL_QUEUE_ENABLE_MASK    GENMASK(25, 25)
#define IGC_TXDCTL_SWFLUSH_MASK         GENMASK(26, 26)
#define IGC_TXDCTL_PRIORITY_MASK        GENMASK(27, 27)

#define IGC_TXDCTL_PTHRESH(x)           FIELD_PREP(IGC_TXDCTL_PTHRESH_MASK, (x))
#define IGC_TXDCTL_HTHRESH(x)           FIELD_PREP(IGC_TXDCTL_HTHRESH_MASK, (x))
#define IGC_TXDCTL_WTHRESH(x)           FIELD_PREP(IGC_TXDCTL_WTHRESH_MASK, (x))
/* Ena specific Tx Queue */
#define IGC_TXDCTL_QUEUE_ENABLE         FIELD_PREP(IGC_TXDCTL_QUEUE_ENABLE_MASK, 1)
/* Transmit Software Flush */
#define IGC_TXDCTL_SWFLUSH              FIELD_PREP(IGC_TXDCTL_SWFLUSH_MASK, 1)
#define IGC_TXDCTL_PRIORITY(x)          FIELD_PREP(IGC_TXDCTL_PRIORITY_MASK, (x))
#define IGC_TXDCTL_PRIORITY_HIGH        IGC_TXDCTL_PRIORITY(1)

#define IGC_RX_DMA_ATTR \
        (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)

#define IGC_TS_HDR_LEN                  16

#define IGC_SKB_PAD                     (NET_SKB_PAD + NET_IP_ALIGN)

#if (PAGE_SIZE < 8192)
#define IGC_MAX_FRAME_BUILD_SKB \
        (SKB_WITH_OVERHEAD(IGC_RXBUFFER_2048) - IGC_SKB_PAD - IGC_TS_HDR_LEN)
#else
#define IGC_MAX_FRAME_BUILD_SKB (IGC_RXBUFFER_2048 - IGC_TS_HDR_LEN)
#endif

/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IGC_RX_BUFFER_WRITE     16 /* Must be power of 2 */

/* VLAN info */
#define IGC_TX_FLAGS_VLAN_MASK  0xffff0000
#define IGC_TX_FLAGS_VLAN_SHIFT 16

/* igc_test_staterr - tests bits within Rx descriptor status and error fields */
static inline __le32 igc_test_staterr(union igc_adv_rx_desc *rx_desc,
                                      const u32 stat_err_bits)
{
        return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
}

enum igc_state_t {
        __IGC_TESTING,
        __IGC_RESETTING,
        __IGC_DOWN,
};

enum igc_tx_flags {
        /* cmd_type flags */
        IGC_TX_FLAGS_VLAN       = 0x01,
        IGC_TX_FLAGS_TSO        = 0x02,
        IGC_TX_FLAGS_TSTAMP     = 0x04,

        /* olinfo flags */
        IGC_TX_FLAGS_IPV4       = 0x10,
        IGC_TX_FLAGS_CSUM       = 0x20,

        IGC_TX_FLAGS_TSTAMP_1   = 0x100,
        IGC_TX_FLAGS_TSTAMP_2   = 0x200,
        IGC_TX_FLAGS_TSTAMP_3   = 0x400,

        IGC_TX_FLAGS_TSTAMP_TIMER_1 = 0x800,
};

enum igc_boards {
        board_base,
};

/* The largest size we can write to the descriptor is 65535.  In order to
 * maintain a power of two alignment we have to limit ourselves to 32K.
 */
#define IGC_MAX_TXD_PWR         15
#define IGC_MAX_DATA_PER_TXD    BIT(IGC_MAX_TXD_PWR)

/* Tx Descriptors needed, worst case */
#define TXD_USE_COUNT(S)        DIV_ROUND_UP((S), IGC_MAX_DATA_PER_TXD)
#define DESC_NEEDED     (MAX_SKB_FRAGS + 4)

struct igc_rx_buffer {
        union {
                struct {
                        dma_addr_t dma;
                        struct page *page;
#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
                        __u32 page_offset;
#else
                        __u16 page_offset;
#endif
                        __u16 pagecnt_bias;
                };
                struct xdp_buff *xdp;
        };
};

/* context wrapper around xdp_buff to provide access to descriptor metadata */
struct igc_xdp_buff {
        struct xdp_buff xdp;
        union igc_adv_rx_desc *rx_desc;
        struct igc_inline_rx_tstamps *rx_ts; /* data indication bit IGC_RXDADV_STAT_TSIP */
};

struct igc_metadata_request {
        struct igc_tx_buffer *tx_buffer;
        struct xsk_tx_metadata *meta;
        struct igc_ring *tx_ring;
        u32 cmd_type;
        u16 used_desc;
};

struct igc_q_vector {
        struct igc_adapter *adapter;    /* backlink */
        void __iomem *itr_register;
        u32 eims_value;                 /* EIMS mask value */

        u16 itr_val;
        u8 set_itr;

        struct igc_ring_container rx, tx;

        struct napi_struct napi;

        struct rcu_head rcu;    /* to avoid race with update stats on free */
        char name[IFNAMSIZ + 9];

        /* for dynamic allocation of rings associated with this q_vector */
        struct igc_ring ring[] ____cacheline_internodealigned_in_smp;
};

enum igc_filter_match_flags {
        IGC_FILTER_FLAG_ETHER_TYPE =    BIT(0),
        IGC_FILTER_FLAG_VLAN_TCI   =    BIT(1),
        IGC_FILTER_FLAG_SRC_MAC_ADDR =  BIT(2),
        IGC_FILTER_FLAG_DST_MAC_ADDR =  BIT(3),
        IGC_FILTER_FLAG_USER_DATA =     BIT(4),
        IGC_FILTER_FLAG_VLAN_ETYPE =    BIT(5),
        IGC_FILTER_FLAG_DEFAULT_QUEUE = BIT(6),
};

struct igc_nfc_filter {
        u8 match_flags;
        u16 etype;
        u16 vlan_etype;
        u16 vlan_tci;
        u16 vlan_tci_mask;
        u8 src_addr[ETH_ALEN];
        u8 dst_addr[ETH_ALEN];
        u8 user_data[8];
        u8 user_mask[8];
        u8 flex_index;
        u8 rx_queue;
        u8 prio;
        u8 immediate_irq;
        u8 drop;
};

struct igc_nfc_rule {
        struct list_head list;
        struct igc_nfc_filter filter;
        u32 location;
        u16 action;
        bool flex;
};

/* IGC supports a total of 65 NFC rules, listed below in order of priority:
 *  - 16 MAC address based filtering rules (highest priority)
 *  - 8 ethertype based filtering rules
 *  - 32 Flex filter based filtering rules
 *  - 8 VLAN priority based filtering rules
 *  - 1 default queue rule (lowest priority)
 */
#define IGC_MAX_RXNFC_RULES             65

struct igc_flex_filter {
        u8 index;
        u8 data[128];
        u8 mask[16];
        u8 length;
        u8 rx_queue;
        u8 prio;
        u8 immediate_irq;
        u8 drop;
};

/* igc_desc_unused - calculate if we have unused descriptors */
static inline u16 igc_desc_unused(const struct igc_ring *ring)
{
        u16 ntc = ring->next_to_clean;
        u16 ntu = ring->next_to_use;

        return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
}

static inline s32 igc_get_phy_info(struct igc_hw *hw)
{
        if (hw->phy.ops.get_phy_info)
                return hw->phy.ops.get_phy_info(hw);

        return 0;
}

static inline s32 igc_reset_phy(struct igc_hw *hw)
{
        if (hw->phy.ops.reset)
                return hw->phy.ops.reset(hw);

        return 0;
}

static inline struct netdev_queue *txring_txq(const struct igc_ring *tx_ring)
{
        return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
}

enum igc_ring_flags_t {
        IGC_RING_FLAG_RX_3K_BUFFER,
        IGC_RING_FLAG_RX_BUILD_SKB_ENABLED,
        IGC_RING_FLAG_RX_SCTP_CSUM,
        IGC_RING_FLAG_RX_LB_VLAN_BSWAP,
        IGC_RING_FLAG_TX_CTX_IDX,
        IGC_RING_FLAG_TX_DETECT_HANG,
        IGC_RING_FLAG_AF_XDP_ZC,
        IGC_RING_FLAG_TX_HWTSTAMP,
        IGC_RING_FLAG_RX_ALLOC_FAILED,
};

#define ring_uses_large_buffer(ring) \
        test_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
#define set_ring_uses_large_buffer(ring) \
        set_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
#define clear_ring_uses_large_buffer(ring) \
        clear_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)

#define ring_uses_build_skb(ring) \
        test_bit(IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)

static inline unsigned int igc_rx_bufsz(struct igc_ring *ring)
{
#if (PAGE_SIZE < 8192)
        if (ring_uses_large_buffer(ring))
                return IGC_RXBUFFER_3072;

        if (ring_uses_build_skb(ring))
                return IGC_MAX_FRAME_BUILD_SKB + IGC_TS_HDR_LEN;
#endif
        return IGC_RXBUFFER_2048;
}

static inline unsigned int igc_rx_pg_order(struct igc_ring *ring)
{
#if (PAGE_SIZE < 8192)
        if (ring_uses_large_buffer(ring))
                return 1;
#endif
        return 0;
}

static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data)
{
        if (hw->phy.ops.read_reg)
                return hw->phy.ops.read_reg(hw, offset, data);

        return -EOPNOTSUPP;
}

void igc_reinit_locked(struct igc_adapter *);
struct igc_nfc_rule *igc_get_nfc_rule(struct igc_adapter *adapter,
                                      u32 location);
int igc_add_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
void igc_del_nfc_rule(struct igc_adapter *adapter, struct igc_nfc_rule *rule);
void igc_disable_empty_addr_recv(struct igc_adapter *adapter);
int igc_enable_empty_addr_recv(struct igc_adapter *adapter);
struct igc_ring *igc_get_tx_ring(struct igc_adapter *adapter, int cpu);
void igc_flush_tx_descriptors(struct igc_ring *ring);
void igc_ptp_init(struct igc_adapter *adapter);
void igc_ptp_reset(struct igc_adapter *adapter);
void igc_ptp_suspend(struct igc_adapter *adapter);
void igc_ptp_stop(struct igc_adapter *adapter);
ktime_t igc_ptp_rx_pktstamp(struct igc_adapter *adapter, __le32 *buf);
int igc_ptp_hwtstamp_get(struct net_device *netdev,
                         struct kernel_hwtstamp_config *config);
int igc_ptp_hwtstamp_set(struct net_device *netdev,
                         struct kernel_hwtstamp_config *config,
                         struct netlink_ext_ack *extack);
void igc_ptp_tx_hang(struct igc_adapter *adapter);
void igc_ptp_clear_xsk_tx_tstamp_queue(struct igc_adapter *adapter,
                                       u16 queue_id);
void igc_ptp_read(struct igc_adapter *adapter, struct timespec64 *ts);
void igc_ptp_tx_tstamp_event(struct igc_adapter *adapter);

int igc_led_setup(struct igc_adapter *adapter);
void igc_led_free(struct igc_adapter *adapter);

#define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring))

#define IGC_TXD_DCMD    (IGC_ADVTXD_DCMD_EOP | IGC_ADVTXD_DCMD_RS)

#define IGC_RX_DESC(R, i)       \
        (&(((union igc_adv_rx_desc *)((R)->desc))[i]))
#define IGC_TX_DESC(R, i)       \
        (&(((union igc_adv_tx_desc *)((R)->desc))[i]))
#define IGC_TX_CTXTDESC(R, i)   \
        (&(((struct igc_adv_tx_context_desc *)((R)->desc))[i]))

#endif /* _IGC_H_ */