/*
 * Copyright (C) 2005 - 2013 Emulex
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.  The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 */

#ifndef BE_H
#define BE_H

#include <linux/pci.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <net/tcp.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <linux/if_vlan.h>
#include <linux/workqueue.h>
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/u64_stats_sync.h>

#include "be_hw.h"
#include "be_roce.h"

#define DRV_VER                 "4.6.62.0u"
#define DRV_NAME                "be2net"
#define BE_NAME                 "Emulex BladeEngine2"
#define BE3_NAME                "Emulex BladeEngine3"
#define OC_NAME                 "Emulex OneConnect"
#define OC_NAME_BE              OC_NAME "(be3)"
#define OC_NAME_LANCER          OC_NAME "(Lancer)"
#define OC_NAME_SH              OC_NAME "(Skyhawk)"
#define DRV_DESC                "Emulex OneConnect 10Gbps NIC Driver"

#define BE_VENDOR_ID            0x19a2
#define EMULEX_VENDOR_ID        0x10df
#define BE_DEVICE_ID1           0x211
#define BE_DEVICE_ID2           0x221
#define OC_DEVICE_ID1           0x700   /* Device Id for BE2 cards */
#define OC_DEVICE_ID2           0x710   /* Device Id for BE3 cards */
#define OC_DEVICE_ID3           0xe220  /* Device id for Lancer cards */
#define OC_DEVICE_ID4           0xe228   /* Device id for VF in Lancer */
#define OC_DEVICE_ID5           0x720   /* Device Id for Skyhawk cards */
#define OC_DEVICE_ID6           0x728   /* Device id for VF in SkyHawk */
#define OC_SUBSYS_DEVICE_ID1    0xE602
#define OC_SUBSYS_DEVICE_ID2    0xE642
#define OC_SUBSYS_DEVICE_ID3    0xE612
#define OC_SUBSYS_DEVICE_ID4    0xE652

static inline char *nic_name(struct pci_dev *pdev)
{
        switch (pdev->device) {
        case OC_DEVICE_ID1:
                return OC_NAME;
        case OC_DEVICE_ID2:
                return OC_NAME_BE;
        case OC_DEVICE_ID3:
        case OC_DEVICE_ID4:
                return OC_NAME_LANCER;
        case BE_DEVICE_ID2:
                return BE3_NAME;
        case OC_DEVICE_ID5:
        case OC_DEVICE_ID6:
                return OC_NAME_SH;
        default:
                return BE_NAME;
        }
}

/* Number of bytes of an RX frame that are copied to skb->data */
#define BE_HDR_LEN              ((u16) 64)
/* allocate extra space to allow tunneling decapsulation without head reallocation */
#define BE_RX_SKB_ALLOC_SIZE (BE_HDR_LEN + 64)

#define BE_MAX_JUMBO_FRAME_SIZE 9018
#define BE_MIN_MTU              256

#define BE_NUM_VLANS_SUPPORTED  64
#define BE_MAX_EQD              96u
#define BE_MAX_TX_FRAG_COUNT    30

#define EVNT_Q_LEN              1024
#define TX_Q_LEN                2048
#define TX_CQ_LEN               1024
#define RX_Q_LEN                1024    /* Does not support any other value */
#define RX_CQ_LEN               1024
#define MCC_Q_LEN               128     /* total size not to exceed 8 pages */
#define MCC_CQ_LEN              256

#define BE3_MAX_RSS_QS          8
#define BE2_MAX_RSS_QS          4
#define MAX_RSS_QS              BE3_MAX_RSS_QS
#define MAX_RX_QS               (MAX_RSS_QS + 1) /* RSS qs + 1 def Rx */

#define MAX_TX_QS               8
#define MAX_ROCE_EQS            5
#define MAX_MSIX_VECTORS        (MAX_RSS_QS + MAX_ROCE_EQS) /* RSS qs + RoCE */
#define BE_TX_BUDGET            256
#define BE_NAPI_WEIGHT          64
#define MAX_RX_POST             BE_NAPI_WEIGHT /* Frags posted at a time */
#define RX_FRAGS_REFILL_WM      (RX_Q_LEN - MAX_RX_POST)

#define MAX_VFS                 30 /* Max VFs supported by BE3 FW */
#define FW_VER_LEN              32

struct be_dma_mem {
        void *va;
        dma_addr_t dma;
        u32 size;
};

struct be_queue_info {
        struct be_dma_mem dma_mem;
        u16 len;
        u16 entry_size; /* Size of an element in the queue */
        u16 id;
        u16 tail, head;
        bool created;
        atomic_t used;  /* Number of valid elements in the queue */
};

static inline u32 MODULO(u16 val, u16 limit)
{
        BUG_ON(limit & (limit - 1));
        return val & (limit - 1);
}

static inline void index_adv(u16 *index, u16 val, u16 limit)
{
        *index = MODULO((*index + val), limit);
}

static inline void index_inc(u16 *index, u16 limit)
{
        *index = MODULO((*index + 1), limit);
}

static inline void *queue_head_node(struct be_queue_info *q)
{
        return q->dma_mem.va + q->head * q->entry_size;
}

static inline void *queue_tail_node(struct be_queue_info *q)
{
        return q->dma_mem.va + q->tail * q->entry_size;
}

static inline void *queue_index_node(struct be_queue_info *q, u16 index)
{
        return q->dma_mem.va + index * q->entry_size;
}

static inline void queue_head_inc(struct be_queue_info *q)
{
        index_inc(&q->head, q->len);
}

static inline void index_dec(u16 *index, u16 limit)
{
        *index = MODULO((*index - 1), limit);
}

static inline void queue_tail_inc(struct be_queue_info *q)
{
        index_inc(&q->tail, q->len);
}

struct be_eq_obj {
        struct be_queue_info q;
        char desc[32];

        /* Adaptive interrupt coalescing (AIC) info */
        bool enable_aic;
        u32 min_eqd;            /* in usecs */
        u32 max_eqd;            /* in usecs */
        u32 eqd;                /* configured val when aic is off */
        u32 cur_eqd;            /* in usecs */

        u8 idx;                 /* array index */
        u16 tx_budget;
        u16 spurious_intr;
        struct napi_struct napi;
        struct be_adapter *adapter;
} ____cacheline_aligned_in_smp;

struct be_mcc_obj {
        struct be_queue_info q;
        struct be_queue_info cq;
        bool rearm_cq;
};

struct be_tx_stats {
        u64 tx_bytes;
        u64 tx_pkts;
        u64 tx_reqs;
        u64 tx_wrbs;
        u64 tx_compl;
        ulong tx_jiffies;
        u32 tx_stops;
        struct u64_stats_sync sync;
        struct u64_stats_sync sync_compl;
};

struct be_tx_obj {
        u32 db_offset;
        struct be_queue_info q;
        struct be_queue_info cq;
        /* Remember the skbs that were transmitted */
        struct sk_buff *sent_skb_list[TX_Q_LEN];
        struct be_tx_stats stats;
} ____cacheline_aligned_in_smp;

/* Struct to remember the pages posted for rx frags */
struct be_rx_page_info {
        struct page *page;
        DEFINE_DMA_UNMAP_ADDR(bus);
        u16 page_offset;
        bool last_page_user;
};

struct be_rx_stats {
        u64 rx_bytes;
        u64 rx_pkts;
        u64 rx_pkts_prev;
        ulong rx_jiffies;
        u32 rx_drops_no_skbs;   /* skb allocation errors */
        u32 rx_drops_no_frags;  /* HW has no fetched frags */
        u32 rx_post_fail;       /* page post alloc failures */
        u32 rx_compl;
        u32 rx_mcast_pkts;
        u32 rx_compl_err;       /* completions with err set */
        u32 rx_pps;             /* pkts per second */
        struct u64_stats_sync sync;
};

struct be_rx_compl_info {
        u32 rss_hash;
        u16 vlan_tag;
        u16 pkt_size;
        u16 rxq_idx;
        u16 port;
        u8 vlanf;
        u8 num_rcvd;
        u8 err;
        u8 ipf;
        u8 tcpf;
        u8 udpf;
        u8 ip_csum;
        u8 l4_csum;
        u8 ipv6;
        u8 vtm;
        u8 pkt_type;
        u8 ip_frag;
};

struct be_rx_obj {
        struct be_adapter *adapter;
        struct be_queue_info q;
        struct be_queue_info cq;
        struct be_rx_compl_info rxcp;
        struct be_rx_page_info page_info_tbl[RX_Q_LEN];
        struct be_rx_stats stats;
        u8 rss_id;
        bool rx_post_starved;   /* Zero rx frags have been posted to BE */
} ____cacheline_aligned_in_smp;

struct be_drv_stats {
        u32 be_on_die_temperature;
        u32 eth_red_drops;
        u32 rx_drops_no_pbuf;
        u32 rx_drops_no_txpb;
        u32 rx_drops_no_erx_descr;
        u32 rx_drops_no_tpre_descr;
        u32 rx_drops_too_many_frags;
        u32 forwarded_packets;
        u32 rx_drops_mtu;
        u32 rx_crc_errors;
        u32 rx_alignment_symbol_errors;
        u32 rx_pause_frames;
        u32 rx_priority_pause_frames;
        u32 rx_control_frames;
        u32 rx_in_range_errors;
        u32 rx_out_range_errors;
        u32 rx_frame_too_long;
        u32 rx_address_filtered;
        u32 rx_dropped_too_small;
        u32 rx_dropped_too_short;
        u32 rx_dropped_header_too_small;
        u32 rx_dropped_tcp_length;
        u32 rx_dropped_runt;
        u32 rx_ip_checksum_errs;
        u32 rx_tcp_checksum_errs;
        u32 rx_udp_checksum_errs;
        u32 tx_pauseframes;
        u32 tx_priority_pauseframes;
        u32 tx_controlframes;
        u32 rxpp_fifo_overflow_drop;
        u32 rx_input_fifo_overflow_drop;
        u32 pmem_fifo_overflow_drop;
        u32 jabber_events;
};

struct be_vf_cfg {
        unsigned char mac_addr[ETH_ALEN];
        int if_handle;
        int pmac_id;
        u16 def_vid;
        u16 vlan_tag;
        u32 tx_rate;
};

enum vf_state {
        ENABLED = 0,
        ASSIGNED = 1
};

#define BE_FLAGS_LINK_STATUS_INIT               1
#define BE_FLAGS_WORKER_SCHEDULED               (1 << 3)
#define BE_FLAGS_NAPI_ENABLED                   (1 << 9)
#define BE_UC_PMAC_COUNT                30
#define BE_VF_UC_PMAC_COUNT             2
#define BE_FLAGS_QNQ_ASYNC_EVT_RCVD             (1 << 11)

struct phy_info {
        u8 transceiver;
        u8 autoneg;
        u8 fc_autoneg;
        u8 port_type;
        u16 phy_type;
        u16 interface_type;
        u32 misc_params;
        u16 auto_speeds_supported;
        u16 fixed_speeds_supported;
        int link_speed;
        u32 dac_cable_len;
        u32 advertising;
        u32 supported;
};

struct be_adapter {
        struct pci_dev *pdev;
        struct net_device *netdev;

        u8 __iomem *csr;        /* CSR BAR used only for BE2/3 */
        u8 __iomem *db;         /* Door Bell */

        struct mutex mbox_lock; /* For serializing mbox cmds to BE card */
        struct be_dma_mem mbox_mem;
        /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
         * is stored for freeing purpose */
        struct be_dma_mem mbox_mem_alloced;

        struct be_mcc_obj mcc_obj;
        spinlock_t mcc_lock;    /* For serializing mcc cmds to BE card */
        spinlock_t mcc_cq_lock;

        u32 num_msix_vec;
        u32 num_evt_qs;
        struct be_eq_obj eq_obj[MAX_MSIX_VECTORS];
        struct msix_entry msix_entries[MAX_MSIX_VECTORS];
        bool isr_registered;

        /* TX Rings */
        u32 num_tx_qs;
        struct be_tx_obj tx_obj[MAX_TX_QS];

        /* Rx rings */
        u32 num_rx_qs;
        struct be_rx_obj rx_obj[MAX_RX_QS];
        u32 big_page_size;      /* Compounded page size shared by rx wrbs */

        struct be_drv_stats drv_stats;
        u16 vlans_added;
        u8 vlan_tag[VLAN_N_VID];
        u8 vlan_prio_bmap;      /* Available Priority BitMap */
        u16 recommended_prio;   /* Recommended Priority */
        struct be_dma_mem rx_filter; /* Cmd DMA mem for rx-filter */

        struct be_dma_mem stats_cmd;
        /* Work queue used to perform periodic tasks like getting statistics */
        struct delayed_work work;
        u16 work_counter;

        struct delayed_work func_recovery_work;
        u32 flags;
        u32 cmd_privileges;
        /* Ethtool knobs and info */
        char fw_ver[FW_VER_LEN];
        int if_handle;          /* Used to configure filtering */
        u32 *pmac_id;           /* MAC addr handle used by BE card */
        u32 beacon_state;       /* for set_phys_id */

        bool eeh_error;
        bool fw_timeout;
        bool hw_error;

        u32 port_num;
        bool promiscuous;
        u32 function_mode;
        u32 function_caps;
        u32 rx_fc;              /* Rx flow control */
        u32 tx_fc;              /* Tx flow control */
        bool stats_cmd_sent;
        u32 if_type;
        struct {
                u32 size;
                u32 total_size;
                u64 io_addr;
        } roce_db;
        u32 num_msix_roce_vec;
        struct ocrdma_dev *ocrdma_dev;
        struct list_head entry;

        u32 flash_status;
        struct completion flash_compl;

        u32 num_vfs;            /* Number of VFs provisioned by PF driver */
        u32 dev_num_vfs;        /* Number of VFs supported by HW */
        u8 virtfn;
        struct be_vf_cfg *vf_cfg;
        bool be3_native;
        u32 sli_family;
        u8 hba_port_num;
        u16 pvid;
        struct phy_info phy;
        u8 wol_cap;
        bool wol;
        u32 uc_macs;            /* Count of secondary UC MAC programmed */
        u16 asic_rev;
        u16 qnq_vid;
        u32 msg_enable;
        int be_get_temp_freq;
        u16 max_mcast_mac;
        u16 max_tx_queues;
        u16 max_rss_queues;
        u16 max_rx_queues;
        u16 max_pmac_cnt;
        u16 max_vlans;
        u16 max_event_queues;
        u32 if_cap_flags;
        u8 pf_number;
        u64 rss_flags;
};

#define be_physfn(adapter)              (!adapter->virtfn)
#define sriov_enabled(adapter)          (adapter->num_vfs > 0)
#define sriov_want(adapter)             (adapter->dev_num_vfs && num_vfs && \
                                         be_physfn(adapter))
#define for_all_vfs(adapter, vf_cfg, i)                                 \
        for (i = 0, vf_cfg = &adapter->vf_cfg[i]; i < adapter->num_vfs; \
                i++, vf_cfg++)

#define ON                              1
#define OFF                             0

#define lancer_chip(adapter)    (adapter->pdev->device == OC_DEVICE_ID3 || \
                                 adapter->pdev->device == OC_DEVICE_ID4)

#define skyhawk_chip(adapter)   (adapter->pdev->device == OC_DEVICE_ID5 || \
                                 adapter->pdev->device == OC_DEVICE_ID6)

#define BE3_chip(adapter)       (adapter->pdev->device == BE_DEVICE_ID2 || \
                                 adapter->pdev->device == OC_DEVICE_ID2)

#define BE2_chip(adapter)       (adapter->pdev->device == BE_DEVICE_ID1 || \
                                 adapter->pdev->device == OC_DEVICE_ID1)

#define BEx_chip(adapter)       (BE3_chip(adapter) || BE2_chip(adapter))

#define be_roce_supported(adapter)      (skyhawk_chip(adapter) && \
                                        (adapter->function_mode & RDMA_ENABLED))

extern const struct ethtool_ops be_ethtool_ops;

#define msix_enabled(adapter)           (adapter->num_msix_vec > 0)
#define num_irqs(adapter)               (msix_enabled(adapter) ?        \
                                                adapter->num_msix_vec : 1)
#define tx_stats(txo)                   (&(txo)->stats)
#define rx_stats(rxo)                   (&(rxo)->stats)

/* The default RXQ is the last RXQ */
#define default_rxo(adpt)               (&adpt->rx_obj[adpt->num_rx_qs - 1])

#define for_all_rx_queues(adapter, rxo, i)                              \
        for (i = 0, rxo = &adapter->rx_obj[i]; i < adapter->num_rx_qs;  \
                i++, rxo++)

/* Skip the default non-rss queue (last one)*/
#define for_all_rss_queues(adapter, rxo, i)                             \
        for (i = 0, rxo = &adapter->rx_obj[i]; i < (adapter->num_rx_qs - 1);\
                i++, rxo++)

#define for_all_tx_queues(adapter, txo, i)                              \
        for (i = 0, txo = &adapter->tx_obj[i]; i < adapter->num_tx_qs;  \
                i++, txo++)

#define for_all_evt_queues(adapter, eqo, i)                             \
        for (i = 0, eqo = &adapter->eq_obj[i]; i < adapter->num_evt_qs; \
                i++, eqo++)

#define is_mcc_eqo(eqo)                 (eqo->idx == 0)
#define mcc_eqo(adapter)                (&adapter->eq_obj[0])

#define PAGE_SHIFT_4K           12
#define PAGE_SIZE_4K            (1 << PAGE_SHIFT_4K)

/* Returns number of pages spanned by the data starting at the given addr */
#define PAGES_4K_SPANNED(_address, size)                                \
                ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
                        (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))

/* Returns bit offset within a DWORD of a bitfield */
#define AMAP_BIT_OFFSET(_struct, field)                                 \
                (((size_t)&(((_struct *)0)->field))%32)

/* Returns the bit mask of the field that is NOT shifted into location. */
static inline u32 amap_mask(u32 bitsize)
{
        return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
}

static inline void
amap_set(void *ptr, u32 dw_offset, u32 mask, u32 offset, u32 value)
{
        u32 *dw = (u32 *) ptr + dw_offset;
        *dw &= ~(mask << offset);
        *dw |= (mask & value) << offset;
}

#define AMAP_SET_BITS(_struct, field, ptr, val)                         \
                amap_set(ptr,                                           \
                        offsetof(_struct, field)/32,                    \
                        amap_mask(sizeof(((_struct *)0)->field)),       \
                        AMAP_BIT_OFFSET(_struct, field),                \
                        val)

static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
{
        u32 *dw = (u32 *) ptr;
        return mask & (*(dw + dw_offset) >> offset);
}

#define AMAP_GET_BITS(_struct, field, ptr)                              \
                amap_get(ptr,                                           \
                        offsetof(_struct, field)/32,                    \
                        amap_mask(sizeof(((_struct *)0)->field)),       \
                        AMAP_BIT_OFFSET(_struct, field))

#define be_dws_cpu_to_le(wrb, len)      swap_dws(wrb, len)
#define be_dws_le_to_cpu(wrb, len)      swap_dws(wrb, len)
static inline void swap_dws(void *wrb, int len)
{
#ifdef __BIG_ENDIAN
        u32 *dw = wrb;
        BUG_ON(len % 4);
        do {
                *dw = cpu_to_le32(*dw);
                dw++;
                len -= 4;
        } while (len);
#endif                          /* __BIG_ENDIAN */
}

static inline u8 is_tcp_pkt(struct sk_buff *skb)
{
        u8 val = 0;

        if (ip_hdr(skb)->version == 4)
                val = (ip_hdr(skb)->protocol == IPPROTO_TCP);
        else if (ip_hdr(skb)->version == 6)
                val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_TCP);

        return val;
}

static inline u8 is_udp_pkt(struct sk_buff *skb)
{
        u8 val = 0;

        if (ip_hdr(skb)->version == 4)
                val = (ip_hdr(skb)->protocol == IPPROTO_UDP);
        else if (ip_hdr(skb)->version == 6)
                val = (ipv6_hdr(skb)->nexthdr == NEXTHDR_UDP);

        return val;
}

static inline bool is_ipv4_pkt(struct sk_buff *skb)
{
        return skb->protocol == htons(ETH_P_IP) && ip_hdr(skb)->version == 4;
}

static inline void be_vf_eth_addr_generate(struct be_adapter *adapter, u8 *mac)
{
        u32 addr;

        addr = jhash(adapter->netdev->dev_addr, ETH_ALEN, 0);

        mac[5] = (u8)(addr & 0xFF);
        mac[4] = (u8)((addr >> 8) & 0xFF);
        mac[3] = (u8)((addr >> 16) & 0xFF);
        /* Use the OUI from the current MAC address */
        memcpy(mac, adapter->netdev->dev_addr, 3);
}

static inline bool be_multi_rxq(const struct be_adapter *adapter)
{
        return adapter->num_rx_qs > 1;
}

static inline bool be_error(struct be_adapter *adapter)
{
        return adapter->eeh_error || adapter->hw_error || adapter->fw_timeout;
}

static inline bool be_hw_error(struct be_adapter *adapter)
{
        return adapter->eeh_error || adapter->hw_error;
}

static inline void  be_clear_all_error(struct be_adapter *adapter)
{
        adapter->eeh_error = false;
        adapter->hw_error = false;
        adapter->fw_timeout = false;
}

static inline bool be_is_wol_excluded(struct be_adapter *adapter)
{
        struct pci_dev *pdev = adapter->pdev;

        if (!be_physfn(adapter))
                return true;

        switch (pdev->subsystem_device) {
        case OC_SUBSYS_DEVICE_ID1:
        case OC_SUBSYS_DEVICE_ID2:
        case OC_SUBSYS_DEVICE_ID3:
        case OC_SUBSYS_DEVICE_ID4:
                return true;
        default:
                return false;
        }
}

static inline int qnq_async_evt_rcvd(struct be_adapter *adapter)
{
        return adapter->flags & BE_FLAGS_QNQ_ASYNC_EVT_RCVD;
}

extern void be_cq_notify(struct be_adapter *adapter, u16 qid, bool arm,
                u16 num_popped);
extern void be_link_status_update(struct be_adapter *adapter, u8 link_status);
extern void be_parse_stats(struct be_adapter *adapter);
extern int be_load_fw(struct be_adapter *adapter, u8 *func);
extern bool be_is_wol_supported(struct be_adapter *adapter);
extern bool be_pause_supported(struct be_adapter *adapter);
extern u32 be_get_fw_log_level(struct be_adapter *adapter);

/*
 * internal function to initialize-cleanup roce device.
 */
extern void be_roce_dev_add(struct be_adapter *);
extern void be_roce_dev_remove(struct be_adapter *);

/*
 * internal function to open-close roce device during ifup-ifdown.
 */
extern void be_roce_dev_open(struct be_adapter *);
extern void be_roce_dev_close(struct be_adapter *);

#endif                          /* BE_H */