/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
 * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
 * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 */

#ifndef ATL1_H
#define ATL1_H

#include <linux/compiler.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include "atlx.h"

#define ATLX_DRIVER_NAME "atl1"

MODULE_DESCRIPTION("Atheros L1 Gigabit Ethernet Driver");

#define atlx_adapter            atl1_adapter
#define atlx_check_for_link     atl1_check_for_link
#define atlx_check_link         atl1_check_link
#define atlx_hash_mc_addr       atl1_hash_mc_addr
#define atlx_hash_set           atl1_hash_set
#define atlx_hw                 atl1_hw
#define atlx_mii_ioctl          atl1_mii_ioctl
#define atlx_read_phy_reg       atl1_read_phy_reg
#define atlx_set_mac            atl1_set_mac
#define atlx_set_mac_addr       atl1_set_mac_addr

struct atl1_adapter;
struct atl1_hw;

/* function prototypes needed by multiple files */
static u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
static void atl1_hash_set(struct atl1_hw *hw, u32 hash_value);
static void atl1_set_mac_addr(struct atl1_hw *hw);
static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
        int cmd);
static u32 atl1_check_link(struct atl1_adapter *adapter);

/* hardware definitions specific to L1 */

/* Block IDLE Status Register */
#define IDLE_STATUS_RXMAC                       0x1
#define IDLE_STATUS_TXMAC                       0x2
#define IDLE_STATUS_RXQ                         0x4
#define IDLE_STATUS_TXQ                         0x8
#define IDLE_STATUS_DMAR                        0x10
#define IDLE_STATUS_DMAW                        0x20
#define IDLE_STATUS_SMB                         0x40
#define IDLE_STATUS_CMB                         0x80

/* MDIO Control Register */
#define MDIO_WAIT_TIMES                         30

/* MAC Control Register */
#define MAC_CTRL_TX_PAUSE                       0x10000
#define MAC_CTRL_SCNT                           0x20000
#define MAC_CTRL_SRST_TX                        0x40000
#define MAC_CTRL_TX_SIMURST                     0x80000
#define MAC_CTRL_SPEED_SHIFT                    20
#define MAC_CTRL_SPEED_MASK                     0x300000
#define MAC_CTRL_SPEED_1000                     0x2
#define MAC_CTRL_SPEED_10_100                   0x1
#define MAC_CTRL_DBG_TX_BKPRESURE               0x400000
#define MAC_CTRL_TX_HUGE                        0x800000
#define MAC_CTRL_RX_CHKSUM_EN                   0x1000000
#define MAC_CTRL_DBG                            0x8000000

/* Wake-On-Lan control register */
#define WOL_CLK_SWITCH_EN                       0x8000
#define WOL_PT5_EN                              0x200000
#define WOL_PT6_EN                              0x400000
#define WOL_PT5_MATCH                           0x8000000
#define WOL_PT6_MATCH                           0x10000000

/* WOL Length ( 2 DWORD ) */
#define REG_WOL_PATTERN_LEN                     0x14A4
#define WOL_PT_LEN_MASK                         0x7F
#define WOL_PT0_LEN_SHIFT                       0
#define WOL_PT1_LEN_SHIFT                       8
#define WOL_PT2_LEN_SHIFT                       16
#define WOL_PT3_LEN_SHIFT                       24
#define WOL_PT4_LEN_SHIFT                       0
#define WOL_PT5_LEN_SHIFT                       8
#define WOL_PT6_LEN_SHIFT                       16

/* Internal SRAM Partition Registers, low 32 bits */
#define REG_SRAM_RFD_LEN                        0x1504
#define REG_SRAM_RRD_ADDR                       0x1508
#define REG_SRAM_RRD_LEN                        0x150C
#define REG_SRAM_TPD_ADDR                       0x1510
#define REG_SRAM_TPD_LEN                        0x1514
#define REG_SRAM_TRD_ADDR                       0x1518
#define REG_SRAM_TRD_LEN                        0x151C
#define REG_SRAM_RXF_ADDR                       0x1520
#define REG_SRAM_RXF_LEN                        0x1524
#define REG_SRAM_TXF_ADDR                       0x1528
#define REG_SRAM_TXF_LEN                        0x152C
#define REG_SRAM_TCPH_PATH_ADDR                 0x1530
#define SRAM_TCPH_ADDR_MASK                     0xFFF
#define SRAM_TCPH_ADDR_SHIFT                    0
#define SRAM_PATH_ADDR_MASK                     0xFFF
#define SRAM_PATH_ADDR_SHIFT                    16

/* Load Ptr Register */
#define REG_LOAD_PTR                            0x1534

/* Descriptor Control registers, low 32 bits */
#define REG_DESC_RFD_ADDR_LO                    0x1544
#define REG_DESC_RRD_ADDR_LO                    0x1548
#define REG_DESC_TPD_ADDR_LO                    0x154C
#define REG_DESC_CMB_ADDR_LO                    0x1550
#define REG_DESC_SMB_ADDR_LO                    0x1554
#define REG_DESC_RFD_RRD_RING_SIZE              0x1558
#define DESC_RFD_RING_SIZE_MASK                 0x7FF
#define DESC_RFD_RING_SIZE_SHIFT                0
#define DESC_RRD_RING_SIZE_MASK                 0x7FF
#define DESC_RRD_RING_SIZE_SHIFT                16
#define REG_DESC_TPD_RING_SIZE                  0x155C
#define DESC_TPD_RING_SIZE_MASK                 0x3FF
#define DESC_TPD_RING_SIZE_SHIFT                0

/* TXQ Control Register */
#define REG_TXQ_CTRL                            0x1580
#define TXQ_CTRL_TPD_BURST_NUM_SHIFT            0
#define TXQ_CTRL_TPD_BURST_NUM_MASK             0x1F
#define TXQ_CTRL_EN                             0x20
#define TXQ_CTRL_ENH_MODE                       0x40
#define TXQ_CTRL_TPD_FETCH_TH_SHIFT             8
#define TXQ_CTRL_TPD_FETCH_TH_MASK              0x3F
#define TXQ_CTRL_TXF_BURST_NUM_SHIFT            16
#define TXQ_CTRL_TXF_BURST_NUM_MASK             0xFFFF

/* Jumbo packet Threshold for task offload */
#define REG_TX_JUMBO_TASK_TH_TPD_IPG            0x1584
#define TX_JUMBO_TASK_TH_MASK                   0x7FF
#define TX_JUMBO_TASK_TH_SHIFT                  0
#define TX_TPD_MIN_IPG_MASK                     0x1F
#define TX_TPD_MIN_IPG_SHIFT                    16

/* RXQ Control Register */
#define REG_RXQ_CTRL                            0x15A0
#define RXQ_CTRL_RFD_BURST_NUM_SHIFT            0
#define RXQ_CTRL_RFD_BURST_NUM_MASK             0xFF
#define RXQ_CTRL_RRD_BURST_THRESH_SHIFT         8
#define RXQ_CTRL_RRD_BURST_THRESH_MASK          0xFF
#define RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT         16
#define RXQ_CTRL_RFD_PREF_MIN_IPG_MASK          0x1F
#define RXQ_CTRL_CUT_THRU_EN                    0x40000000
#define RXQ_CTRL_EN                             0x80000000

/* Rx jumbo packet threshold and rrd  retirement timer */
#define REG_RXQ_JMBOSZ_RRDTIM                   0x15A4
#define RXQ_JMBOSZ_TH_MASK                      0x7FF
#define RXQ_JMBOSZ_TH_SHIFT                     0
#define RXQ_JMBO_LKAH_MASK                      0xF
#define RXQ_JMBO_LKAH_SHIFT                     11
#define RXQ_RRD_TIMER_MASK                      0xFFFF
#define RXQ_RRD_TIMER_SHIFT                     16

/* RFD flow control register */
#define REG_RXQ_RXF_PAUSE_THRESH                0x15A8
#define RXQ_RXF_PAUSE_TH_HI_SHIFT               16
#define RXQ_RXF_PAUSE_TH_HI_MASK                0xFFF
#define RXQ_RXF_PAUSE_TH_LO_SHIFT               0
#define RXQ_RXF_PAUSE_TH_LO_MASK                0xFFF

/* RRD flow control register */
#define REG_RXQ_RRD_PAUSE_THRESH                0x15AC
#define RXQ_RRD_PAUSE_TH_HI_SHIFT               0
#define RXQ_RRD_PAUSE_TH_HI_MASK                0xFFF
#define RXQ_RRD_PAUSE_TH_LO_SHIFT               16
#define RXQ_RRD_PAUSE_TH_LO_MASK                0xFFF

/* DMA Engine Control Register */
#define REG_DMA_CTRL                            0x15C0
#define DMA_CTRL_DMAR_IN_ORDER                  0x1
#define DMA_CTRL_DMAR_ENH_ORDER                 0x2
#define DMA_CTRL_DMAR_OUT_ORDER                 0x4
#define DMA_CTRL_RCB_VALUE                      0x8
#define DMA_CTRL_DMAR_BURST_LEN_SHIFT           4
#define DMA_CTRL_DMAR_BURST_LEN_MASK            7
#define DMA_CTRL_DMAW_BURST_LEN_SHIFT           7
#define DMA_CTRL_DMAW_BURST_LEN_MASK            7
#define DMA_CTRL_DMAR_EN                        0x400
#define DMA_CTRL_DMAW_EN                        0x800

/* CMB/SMB Control Register */
#define REG_CSMB_CTRL                           0x15D0
#define CSMB_CTRL_CMB_NOW                       1
#define CSMB_CTRL_SMB_NOW                       2
#define CSMB_CTRL_CMB_EN                        4
#define CSMB_CTRL_SMB_EN                        8

/* CMB DMA Write Threshold Register */
#define REG_CMB_WRITE_TH                        0x15D4
#define CMB_RRD_TH_SHIFT                        0
#define CMB_RRD_TH_MASK                         0x7FF
#define CMB_TPD_TH_SHIFT                        16
#define CMB_TPD_TH_MASK                         0x7FF

/* RX/TX count-down timer to trigger CMB-write. 2us resolution. */
#define REG_CMB_WRITE_TIMER                     0x15D8
#define CMB_RX_TM_SHIFT                         0
#define CMB_RX_TM_MASK                          0xFFFF
#define CMB_TX_TM_SHIFT                         16
#define CMB_TX_TM_MASK                          0xFFFF

/* Number of packet received since last CMB write */
#define REG_CMB_RX_PKT_CNT                      0x15DC

/* Number of packet transmitted since last CMB write */
#define REG_CMB_TX_PKT_CNT                      0x15E0

/* SMB auto DMA timer register */
#define REG_SMB_TIMER                           0x15E4

/* Mailbox Register */
#define REG_MAILBOX                             0x15F0
#define MB_RFD_PROD_INDX_SHIFT                  0
#define MB_RFD_PROD_INDX_MASK                   0x7FF
#define MB_RRD_CONS_INDX_SHIFT                  11
#define MB_RRD_CONS_INDX_MASK                   0x7FF
#define MB_TPD_PROD_INDX_SHIFT                  22
#define MB_TPD_PROD_INDX_MASK                   0x3FF

/* Interrupt Status Register */
#define ISR_SMB                                 0x1
#define ISR_TIMER                               0x2
#define ISR_MANUAL                              0x4
#define ISR_RXF_OV                              0x8
#define ISR_RFD_UNRUN                           0x10
#define ISR_RRD_OV                              0x20
#define ISR_TXF_UNRUN                           0x40
#define ISR_LINK                                0x80
#define ISR_HOST_RFD_UNRUN                      0x100
#define ISR_HOST_RRD_OV                         0x200
#define ISR_DMAR_TO_RST                         0x400
#define ISR_DMAW_TO_RST                         0x800
#define ISR_GPHY                                0x1000
#define ISR_RX_PKT                              0x10000
#define ISR_TX_PKT                              0x20000
#define ISR_TX_DMA                              0x40000
#define ISR_RX_DMA                              0x80000
#define ISR_CMB_RX                              0x100000
#define ISR_CMB_TX                              0x200000
#define ISR_MAC_RX                              0x400000
#define ISR_MAC_TX                              0x800000
#define ISR_DIS_SMB                             0x20000000
#define ISR_DIS_DMA                             0x40000000

/* Normal Interrupt mask without RX/TX enabled */
#define IMR_NORXTX_MASK (\
        ISR_SMB         |\
        ISR_GPHY        |\
        ISR_PHY_LINKDOWN|\
        ISR_DMAR_TO_RST |\
        ISR_DMAW_TO_RST)

/* Normal Interrupt mask  */
#define IMR_NORMAL_MASK (\
        IMR_NORXTX_MASK |\
        ISR_CMB_TX      |\
        ISR_CMB_RX)

/* Debug Interrupt Mask  (enable all interrupt) */
#define IMR_DEBUG_MASK  (\
        ISR_SMB         |\
        ISR_TIMER       |\
        ISR_MANUAL      |\
        ISR_RXF_OV      |\
        ISR_RFD_UNRUN   |\
        ISR_RRD_OV      |\
        ISR_TXF_UNRUN   |\
        ISR_LINK        |\
        ISR_CMB_TX      |\
        ISR_CMB_RX      |\
        ISR_RX_PKT      |\
        ISR_TX_PKT      |\
        ISR_MAC_RX      |\
        ISR_MAC_TX)

#define MEDIA_TYPE_1000M_FULL                   1
#define MEDIA_TYPE_100M_FULL                    2
#define MEDIA_TYPE_100M_HALF                    3
#define MEDIA_TYPE_10M_FULL                     4
#define MEDIA_TYPE_10M_HALF                     5

#define AUTONEG_ADVERTISE_SPEED_DEFAULT         0x002F  /* All but 1000-Half */

#define MAX_JUMBO_FRAME_SIZE                    10240

#define ATL1_EEDUMP_LEN                         48

/* Statistics counters collected by the MAC */
struct stats_msg_block {
        /* rx */
        u32 rx_ok;              /* good RX packets */
        u32 rx_bcast;           /* good RX broadcast packets */
        u32 rx_mcast;           /* good RX multicast packets */
        u32 rx_pause;           /* RX pause frames */
        u32 rx_ctrl;            /* RX control packets other than pause frames */
        u32 rx_fcs_err;         /* RX packets with bad FCS */
        u32 rx_len_err;         /* RX packets with length != actual size */
        u32 rx_byte_cnt;        /* good bytes received. FCS is NOT included */
        u32 rx_runt;            /* RX packets < 64 bytes with good FCS */
        u32 rx_frag;            /* RX packets < 64 bytes with bad FCS */
        u32 rx_sz_64;           /* 64 byte RX packets */
        u32 rx_sz_65_127;
        u32 rx_sz_128_255;
        u32 rx_sz_256_511;
        u32 rx_sz_512_1023;
        u32 rx_sz_1024_1518;
        u32 rx_sz_1519_max;     /* 1519 byte to MTU RX packets */
        u32 rx_sz_ov;           /* truncated RX packets > MTU */
        u32 rx_rxf_ov;          /* frames dropped due to RX FIFO overflow */
        u32 rx_rrd_ov;          /* frames dropped due to RRD overflow */
        u32 rx_align_err;       /* alignment errors */
        u32 rx_bcast_byte_cnt;  /* RX broadcast bytes, excluding FCS */
        u32 rx_mcast_byte_cnt;  /* RX multicast bytes, excluding FCS */
        u32 rx_err_addr;        /* packets dropped due to address filtering */

        /* tx */
        u32 tx_ok;              /* good TX packets */
        u32 tx_bcast;           /* good TX broadcast packets */
        u32 tx_mcast;           /* good TX multicast packets */
        u32 tx_pause;           /* TX pause frames */
        u32 tx_exc_defer;       /* TX packets deferred excessively */
        u32 tx_ctrl;            /* TX control frames, excluding pause frames */
        u32 tx_defer;           /* TX packets deferred */
        u32 tx_byte_cnt;        /* bytes transmitted, FCS is NOT included */
        u32 tx_sz_64;           /* 64 byte TX packets */
        u32 tx_sz_65_127;
        u32 tx_sz_128_255;
        u32 tx_sz_256_511;
        u32 tx_sz_512_1023;
        u32 tx_sz_1024_1518;
        u32 tx_sz_1519_max;     /* 1519 byte to MTU TX packets */
        u32 tx_1_col;           /* packets TX after a single collision */
        u32 tx_2_col;           /* packets TX after multiple collisions */
        u32 tx_late_col;        /* TX packets with late collisions */
        u32 tx_abort_col;       /* TX packets aborted w/excessive collisions */
        u32 tx_underrun;        /* TX packets aborted due to TX FIFO underrun
                                 * or TRD FIFO underrun */
        u32 tx_rd_eop;          /* reads beyond the EOP into the next frame
                                 * when TRD was not written timely */
        u32 tx_len_err;         /* TX packets where length != actual size */
        u32 tx_trunc;           /* TX packets truncated due to size > MTU */
        u32 tx_bcast_byte;      /* broadcast bytes transmitted, excluding FCS */
        u32 tx_mcast_byte;      /* multicast bytes transmitted, excluding FCS */
        u32 smb_updated;        /* 1: SMB Updated. This is used by software to
                                 * indicate the statistics update. Software
                                 * should clear this bit after retrieving the
                                 * statistics information. */
};

/* Coalescing Message Block */
struct coals_msg_block {
        u32 int_stats;          /* interrupt status */
        u16 rrd_prod_idx;       /* TRD Producer Index. */
        u16 rfd_cons_idx;       /* RFD Consumer Index. */
        u16 update;             /* Selene sets this bit every time it DMAs the
                                 * CMB to host memory. Software should clear
                                 * this bit when CMB info is processed. */
        u16 tpd_cons_idx;       /* TPD Consumer Index. */
};

/* RRD descriptor */
struct rx_return_desc {
        u8 num_buf;     /* Number of RFD buffers used by the received packet */
        u8 resved;
        u16 buf_indx;   /* RFD Index of the first buffer */
        union {
                u32 valid;
                struct {
                        u16 rx_chksum;
                        u16 pkt_size;
                } xsum_sz;
        } xsz;

        u16 pkt_flg;    /* Packet flags */
        u16 err_flg;    /* Error flags */
        u16 resved2;
        u16 vlan_tag;   /* VLAN TAG */
};

#define PACKET_FLAG_ETH_TYPE    0x0080
#define PACKET_FLAG_VLAN_INS    0x0100
#define PACKET_FLAG_ERR         0x0200
#define PACKET_FLAG_IPV4        0x0400
#define PACKET_FLAG_UDP         0x0800
#define PACKET_FLAG_TCP         0x1000
#define PACKET_FLAG_BCAST       0x2000
#define PACKET_FLAG_MCAST       0x4000
#define PACKET_FLAG_PAUSE       0x8000

#define ERR_FLAG_CRC            0x0001
#define ERR_FLAG_CODE           0x0002
#define ERR_FLAG_DRIBBLE        0x0004
#define ERR_FLAG_RUNT           0x0008
#define ERR_FLAG_OV             0x0010
#define ERR_FLAG_TRUNC          0x0020
#define ERR_FLAG_IP_CHKSUM      0x0040
#define ERR_FLAG_L4_CHKSUM      0x0080
#define ERR_FLAG_LEN            0x0100
#define ERR_FLAG_DES_ADDR       0x0200

/* RFD descriptor */
struct rx_free_desc {
        __le64 buffer_addr;     /* Address of the descriptor's data buffer */
        __le16 buf_len;         /* Size of the receive buffer in host memory */
        u16 coalese;            /* Update consumer index to host after the
                                 * reception of this frame */
        /* __packed is required */
} __packed;

/*
 * The L1 transmit packet descriptor is comprised of four 32-bit words.
 *
 *      31                                      0
 *      +---------------------------------------+
 *      |       Word 0: Buffer addr lo          |
 *      +---------------------------------------+
 *      |       Word 1: Buffer addr hi          |
 *      +---------------------------------------+
 *      |               Word 2                  |
 *      +---------------------------------------+
 *      |               Word 3                  |
 *      +---------------------------------------+
 *
 * Words 0 and 1 combine to form a 64-bit buffer address.
 *
 * Word 2 is self explanatory in the #define block below.
 *
 * Word 3 has two forms, depending upon the state of bits 3 and 4.
 * If bits 3 and 4 are both zero, then bits 14:31 are unused by the
 * hardware.  Otherwise, if either bit 3 or 4 is set, the definition
 * of bits 14:31 vary according to the following depiction.
 *
 *      0       End of packet                   0       End of packet
 *      1       Coalesce                        1       Coalesce
 *      2       Insert VLAN tag                 2       Insert VLAN tag
 *      3       Custom csum enable = 0          3       Custom csum enable = 1
 *      4       Segment enable = 1              4       Segment enable = 0
 *      5       Generate IP checksum            5       Generate IP checksum
 *      6       Generate TCP checksum           6       Generate TCP checksum
 *      7       Generate UDP checksum           7       Generate UDP checksum
 *      8       VLAN tagged                     8       VLAN tagged
 *      9       Ethernet frame type             9       Ethernet frame type
 *      10-+                                    10-+
 *      11 |    IP hdr length (10:13)           11 |    IP hdr length (10:13)
 *      12 |    (num 32-bit words)              12 |    (num 32-bit words)
 *      13-+                                    13-+
 *      14-+                                    14      Unused
 *      15 |    TCP hdr length (14:17)          15      Unused
 *      16 |    (num 32-bit words)              16-+
 *      17-+                                    17 |
 *      18      Header TPD flag                 18 |
 *      19-+                                    19 |    Payload offset
 *      20 |                                    20 |        (16:23)
 *      21 |                                    21 |
 *      22 |                                    22 |
 *      23 |                                    23-+
 *      24 |                                    24-+
 *      25 |    MSS (19:31)                     25 |
 *      26 |                                    26 |
 *      27 |                                    27 |    Custom csum offset
 *      28 |                                    28 |         (24:31)
 *      29 |                                    29 |
 *      30 |                                    30 |
 *      31-+                                    31-+
 */

/* tpd word 2 */
#define TPD_BUFLEN_MASK         0x3FFF
#define TPD_BUFLEN_SHIFT        0
#define TPD_DMAINT_MASK         0x0001
#define TPD_DMAINT_SHIFT        14
#define TPD_PKTNT_MASK          0x0001
#define TPD_PKTINT_SHIFT        15
#define TPD_VLANTAG_MASK        0xFFFF
#define TPD_VLANTAG_SHIFT       16

/* tpd word 3 bits 0:13 */
#define TPD_EOP_MASK            0x0001
#define TPD_EOP_SHIFT           0
#define TPD_COALESCE_MASK       0x0001
#define TPD_COALESCE_SHIFT      1
#define TPD_INS_VL_TAG_MASK     0x0001
#define TPD_INS_VL_TAG_SHIFT    2
#define TPD_CUST_CSUM_EN_MASK   0x0001
#define TPD_CUST_CSUM_EN_SHIFT  3
#define TPD_SEGMENT_EN_MASK     0x0001
#define TPD_SEGMENT_EN_SHIFT    4
#define TPD_IP_CSUM_MASK        0x0001
#define TPD_IP_CSUM_SHIFT       5
#define TPD_TCP_CSUM_MASK       0x0001
#define TPD_TCP_CSUM_SHIFT      6
#define TPD_UDP_CSUM_MASK       0x0001
#define TPD_UDP_CSUM_SHIFT      7
#define TPD_VL_TAGGED_MASK      0x0001
#define TPD_VL_TAGGED_SHIFT     8
#define TPD_ETHTYPE_MASK        0x0001
#define TPD_ETHTYPE_SHIFT       9
#define TPD_IPHL_MASK           0x000F
#define TPD_IPHL_SHIFT          10

/* tpd word 3 bits 14:31 if segment enabled */
#define TPD_TCPHDRLEN_MASK      0x000F
#define TPD_TCPHDRLEN_SHIFT     14
#define TPD_HDRFLAG_MASK        0x0001
#define TPD_HDRFLAG_SHIFT       18
#define TPD_MSS_MASK            0x1FFF
#define TPD_MSS_SHIFT           19

/* tpd word 3 bits 16:31 if custom csum enabled */
#define TPD_PLOADOFFSET_MASK    0x00FF
#define TPD_PLOADOFFSET_SHIFT   16
#define TPD_CCSUMOFFSET_MASK    0x00FF
#define TPD_CCSUMOFFSET_SHIFT   24

struct tx_packet_desc {
        __le64 buffer_addr;
        __le32 word2;
        __le32 word3;
};

/* DMA Order Settings */
enum atl1_dma_order {
        atl1_dma_ord_in = 1,
        atl1_dma_ord_enh = 2,
        atl1_dma_ord_out = 4
};

enum atl1_dma_rcb {
        atl1_rcb_64 = 0,
        atl1_rcb_128 = 1
};

enum atl1_dma_req_block {
        atl1_dma_req_128 = 0,
        atl1_dma_req_256 = 1,
        atl1_dma_req_512 = 2,
        atl1_dma_req_1024 = 3,
        atl1_dma_req_2048 = 4,
        atl1_dma_req_4096 = 5
};

#define ATL1_MAX_INTR           3
#define ATL1_MAX_TX_BUF_LEN     0x3000  /* 12288 bytes */

#define ATL1_DEFAULT_TPD        256
#define ATL1_MAX_TPD            1024
#define ATL1_MIN_TPD            64
#define ATL1_DEFAULT_RFD        512
#define ATL1_MIN_RFD            128
#define ATL1_MAX_RFD            2048
#define ATL1_REG_COUNT          1538

#define ATL1_GET_DESC(R, i, type)       (&(((type *)((R)->desc))[i]))
#define ATL1_RFD_DESC(R, i)     ATL1_GET_DESC(R, i, struct rx_free_desc)
#define ATL1_TPD_DESC(R, i)     ATL1_GET_DESC(R, i, struct tx_packet_desc)
#define ATL1_RRD_DESC(R, i)     ATL1_GET_DESC(R, i, struct rx_return_desc)

/*
 * atl1_ring_header represents a single, contiguous block of DMA space
 * mapped for the three descriptor rings (tpd, rfd, rrd) and the two
 * message blocks (cmb, smb) described below
 */
struct atl1_ring_header {
        void *desc;             /* virtual address */
        dma_addr_t dma;         /* physical address*/
        unsigned int size;      /* length in bytes */
};

/*
 * atl1_buffer is wrapper around a pointer to a socket buffer
 * so a DMA handle can be stored along with the skb
 */
struct atl1_buffer {
        struct sk_buff *skb;    /* socket buffer */
        u16 length;             /* rx buffer length */
        u16 alloced;            /* 1 if skb allocated */
        dma_addr_t dma;
};

/* transmit packet descriptor (tpd) ring */
struct atl1_tpd_ring {
        void *desc;             /* descriptor ring virtual address */
        dma_addr_t dma;         /* descriptor ring physical address */
        u16 size;               /* descriptor ring length in bytes */
        u16 count;              /* number of descriptors in the ring */
        u16 hw_idx;             /* hardware index */
        atomic_t next_to_clean;
        atomic_t next_to_use;
        struct atl1_buffer *buffer_info;
};

/* receive free descriptor (rfd) ring */
struct atl1_rfd_ring {
        void *desc;             /* descriptor ring virtual address */
        dma_addr_t dma;         /* descriptor ring physical address */
        u16 size;               /* descriptor ring length in bytes */
        u16 count;              /* number of descriptors in the ring */
        atomic_t next_to_use;
        u16 next_to_clean;
        struct atl1_buffer *buffer_info;
};

/* receive return descriptor (rrd) ring */
struct atl1_rrd_ring {
        void *desc;             /* descriptor ring virtual address */
        dma_addr_t dma;         /* descriptor ring physical address */
        unsigned int size;      /* descriptor ring length in bytes */
        u16 count;              /* number of descriptors in the ring */
        u16 next_to_use;
        atomic_t next_to_clean;
};

/* coalescing message block (cmb) */
struct atl1_cmb {
        struct coals_msg_block *cmb;
        dma_addr_t dma;
};

/* statistics message block (smb) */
struct atl1_smb {
        struct stats_msg_block *smb;
        dma_addr_t dma;
};

/* Statistics counters */
struct atl1_sft_stats {
        u64 rx_packets;
        u64 tx_packets;
        u64 rx_bytes;
        u64 tx_bytes;
        u64 multicast;
        u64 collisions;
        u64 rx_errors;
        u64 rx_length_errors;
        u64 rx_crc_errors;
        u64 rx_dropped;
        u64 rx_frame_errors;
        u64 rx_fifo_errors;
        u64 rx_missed_errors;
        u64 tx_errors;
        u64 tx_fifo_errors;
        u64 tx_aborted_errors;
        u64 tx_window_errors;
        u64 tx_carrier_errors;
        u64 tx_pause;           /* TX pause frames */
        u64 excecol;            /* TX packets w/ excessive collisions */
        u64 deffer;             /* TX packets deferred */
        u64 scc;                /* packets TX after a single collision */
        u64 mcc;                /* packets TX after multiple collisions */
        u64 latecol;            /* TX packets w/ late collisions */
        u64 tx_underrun;        /* TX packets aborted due to TX FIFO underrun
                                 * or TRD FIFO underrun */
        u64 tx_trunc;           /* TX packets truncated due to size > MTU */
        u64 rx_pause;           /* num Pause packets received. */
        u64 rx_rrd_ov;
        u64 rx_trunc;
};

/* hardware structure */
struct atl1_hw {
        u8 __iomem *hw_addr;
        struct atl1_adapter *back;
        enum atl1_dma_order dma_ord;
        enum atl1_dma_rcb rcb_value;
        enum atl1_dma_req_block dmar_block;
        enum atl1_dma_req_block dmaw_block;
        u8 preamble_len;
        u8 max_retry;
        u8 jam_ipg;             /* IPG to start JAM for collision based flow
                                 * control in half-duplex mode. In units of
                                 * 8-bit time */
        u8 ipgt;                /* Desired back to back inter-packet gap.
                                 * The default is 96-bit time */
        u8 min_ifg;             /* Minimum number of IFG to enforce in between
                                 * receive frames. Frame gap below such IFP
                                 * is dropped */
        u8 ipgr1;               /* 64bit Carrier-Sense window */
        u8 ipgr2;               /* 96-bit IPG window */
        u8 tpd_burst;           /* Number of TPD to prefetch in cache-aligned
                                 * burst. Each TPD is 16 bytes long */
        u8 rfd_burst;           /* Number of RFD to prefetch in cache-aligned
                                 * burst. Each RFD is 12 bytes long */
        u8 rfd_fetch_gap;
        u8 rrd_burst;           /* Threshold number of RRDs that can be retired
                                 * in a burst. Each RRD is 16 bytes long */
        u8 tpd_fetch_th;
        u8 tpd_fetch_gap;
        u16 tx_jumbo_task_th;
        u16 txf_burst;          /* Number of data bytes to read in a cache-
                                 * aligned burst. Each SRAM entry is 8 bytes */
        u16 rx_jumbo_th;        /* Jumbo packet size for non-VLAN packet. VLAN
                                 * packets should add 4 bytes */
        u16 rx_jumbo_lkah;
        u16 rrd_ret_timer;      /* RRD retirement timer. Decrement by 1 after
                                 * every 512ns passes. */
        u16 lcol;               /* Collision Window */

        u16 cmb_tpd;
        u16 cmb_rrd;
        u16 cmb_rx_timer;
        u16 cmb_tx_timer;
        u32 smb_timer;
        u16 media_type;
        u16 autoneg_advertised;

        u16 mii_autoneg_adv_reg;
        u16 mii_1000t_ctrl_reg;

        u32 max_frame_size;
        u32 min_frame_size;

        u16 dev_rev;

        /* spi flash */
        u8 flash_vendor;

        u8 mac_addr[ETH_ALEN];
        u8 perm_mac_addr[ETH_ALEN];

        bool phy_configured;
};

struct atl1_adapter {
        struct net_device *netdev;
        struct pci_dev *pdev;

        struct atl1_sft_stats soft_stats;
        u32 rx_buffer_len;
        u32 wol;
        u16 link_speed;
        u16 link_duplex;
        spinlock_t lock;
        struct napi_struct napi;
        struct work_struct reset_dev_task;
        struct work_struct link_chg_task;

        struct timer_list phy_config_timer;
        bool phy_timer_pending;

        /* all descriptor rings' memory */
        struct atl1_ring_header ring_header;

        /* TX */
        struct atl1_tpd_ring tpd_ring;
        spinlock_t mb_lock;

        /* RX */
        struct atl1_rfd_ring rfd_ring;
        struct atl1_rrd_ring rrd_ring;
        u64 hw_csum_err;
        u64 hw_csum_good;
        u32 msg_enable;
        u16 imt;                /* interrupt moderator timer (2us resolution) */
        u16 ict;                /* interrupt clear timer (2us resolution */
        struct mii_if_info mii; /* MII interface info */

        /*
         * Use this value to check is napi handler allowed to
         * enable ints or not
         */
        bool int_enabled;

        u32 bd_number;          /* board number */
        bool pci_using_64;
        struct atl1_hw hw;
        struct atl1_smb smb;
        struct atl1_cmb cmb;
};

#endif /* ATL1_H */