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 * s2io.h: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
 * Copyright(c) 2002-2007 Neterion Inc.

 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL), incorporated herein by reference.
 * Drivers based on or derived from this code fall under the GPL and must
 * retain the authorship, copyright and license notice.  This file is not
 * a complete program and may only be used when the entire operating
 * system is licensed under the GPL.
 * See the file COPYING in this distribution for more information.
#ifndef _S2IO_H
#define _S2IO_H

#define TBD 0
#define s2BIT(loc)            (0x8000000000000000ULL >> (loc))
#define vBIT(val, loc, sz)    (((u64)val) << (64-loc-sz))
#define INV(d)  ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff)

#ifndef BOOL
#define BOOL    int

#ifndef TRUE
#define TRUE    1
#define FALSE   0

#undef SUCCESS
#define SUCCESS 0
#define FAILURE -1
#define S2IO_BIT_RESET 1
#define S2IO_BIT_SET 2
#define CHECKBIT(value, nbit) (value & (1 << nbit))

/* Maximum time to flicker LED when asked to identify NIC using ethtool */
#define MAX_FLICKER_TIME      60000 /* 60 Secs */

/* Maximum outstanding splits to be configured into xena. */
enum {

/*  OS concerned variables and constants */
#define WATCH_DOG_TIMEOUT           15*HZ
#define EFILL                       0x1234
#define ALIGN_SIZE                  127
#define     PCIX_COMMAND_REGISTER         0x62

 * Debug related variables.
/* different debug levels. */
#define     ERR_DBG           0
#define     INIT_DBG    1
#define     INFO_DBG    2
#define     TX_DBG            3
#define     INTR_DBG    4

/* Global variable that defines the present debug level of the driver. */
static int debug_level = ERR_DBG;

/* DEBUG message print. */
#define DBG_PRINT(dbg_level, args...)  if(!(debug_level<dbg_level)) printk(args)

#define DMA_ERROR_CODE          (~(dma_addr_t)0x0)

/* Protocol assist features of the NIC */
#define L3_CKSUM_OK 0xFFFF
#define L4_CKSUM_OK 0xFFFF
#define S2IO_JUMBO_SIZE 9600

/* Driver statistics maintained by driver */
struct swStat {
      unsigned long long single_ecc_errs;
      unsigned long long double_ecc_errs;
      unsigned long long parity_err_cnt;
      unsigned long long serious_err_cnt;
      unsigned long long soft_reset_cnt;
      unsigned long long fifo_full_cnt;
      unsigned long long ring_full_cnt[8];
      /* LRO statistics */
      unsigned long long clubbed_frms_cnt;
      unsigned long long sending_both;
      unsigned long long outof_sequence_pkts;
      unsigned long long flush_max_pkts;
      unsigned long long sum_avg_pkts_aggregated;
      unsigned long long num_aggregations;
      /* Other statistics */
      unsigned long long mem_alloc_fail_cnt;
      unsigned long long pci_map_fail_cnt;
      unsigned long long watchdog_timer_cnt;
      unsigned long long mem_allocated;
      unsigned long long mem_freed;
      unsigned long long link_up_cnt;
      unsigned long long link_down_cnt;
      unsigned long long link_up_time;
      unsigned long long link_down_time;

      /* Transfer Code statistics */
      unsigned long long tx_buf_abort_cnt;
      unsigned long long tx_desc_abort_cnt;
      unsigned long long tx_parity_err_cnt;
      unsigned long long tx_link_loss_cnt;
      unsigned long long tx_list_proc_err_cnt;

      unsigned long long rx_parity_err_cnt;
      unsigned long long rx_abort_cnt;
      unsigned long long rx_parity_abort_cnt;
      unsigned long long rx_rda_fail_cnt;
      unsigned long long rx_unkn_prot_cnt;
      unsigned long long rx_fcs_err_cnt;
      unsigned long long rx_buf_size_err_cnt;
      unsigned long long rx_rxd_corrupt_cnt;
      unsigned long long rx_unkn_err_cnt;

      /* Error/alarm statistics*/
      unsigned long long tda_err_cnt;
      unsigned long long pfc_err_cnt;
      unsigned long long pcc_err_cnt;
      unsigned long long tti_err_cnt;
      unsigned long long lso_err_cnt;
      unsigned long long tpa_err_cnt;
      unsigned long long sm_err_cnt;
      unsigned long long mac_tmac_err_cnt;
      unsigned long long mac_rmac_err_cnt;
      unsigned long long xgxs_txgxs_err_cnt;
      unsigned long long xgxs_rxgxs_err_cnt;
      unsigned long long rc_err_cnt;
      unsigned long long prc_pcix_err_cnt;
      unsigned long long rpa_err_cnt;
      unsigned long long rda_err_cnt;
      unsigned long long rti_err_cnt;
      unsigned long long mc_err_cnt;


/* Xpak releated alarm and warnings */
struct xpakStat {
      u64 alarm_transceiver_temp_high;
      u64 alarm_transceiver_temp_low;
      u64 alarm_laser_bias_current_high;
      u64 alarm_laser_bias_current_low;
      u64 alarm_laser_output_power_high;
      u64 alarm_laser_output_power_low;
      u64 warn_transceiver_temp_high;
      u64 warn_transceiver_temp_low;
      u64 warn_laser_bias_current_high;
      u64 warn_laser_bias_current_low;
      u64 warn_laser_output_power_high;
      u64 warn_laser_output_power_low;
      u64 xpak_regs_stat;
      u32 xpak_timer_count;

/* The statistics block of Xena */
struct stat_block {
/* Tx MAC statistics counters. */
      __le32 tmac_data_octets;
      __le32 tmac_frms;
      __le64 tmac_drop_frms;
      __le32 tmac_bcst_frms;
      __le32 tmac_mcst_frms;
      __le64 tmac_pause_ctrl_frms;
      __le32 tmac_ucst_frms;
      __le32 tmac_ttl_octets;
      __le32 tmac_any_err_frms;
      __le32 tmac_nucst_frms;
      __le64 tmac_ttl_less_fb_octets;
      __le64 tmac_vld_ip_octets;
      __le32 tmac_drop_ip;
      __le32 tmac_vld_ip;
      __le32 tmac_rst_tcp;
      __le32 tmac_icmp;
      __le64 tmac_tcp;
      __le32 reserved_0;
      __le32 tmac_udp;

/* Rx MAC Statistics counters. */
      __le32 rmac_data_octets;
      __le32 rmac_vld_frms;
      __le64 rmac_fcs_err_frms;
      __le64 rmac_drop_frms;
      __le32 rmac_vld_bcst_frms;
      __le32 rmac_vld_mcst_frms;
      __le32 rmac_out_rng_len_err_frms;
      __le32 rmac_in_rng_len_err_frms;
      __le64 rmac_long_frms;
      __le64 rmac_pause_ctrl_frms;
      __le64 rmac_unsup_ctrl_frms;
      __le32 rmac_accepted_ucst_frms;
      __le32 rmac_ttl_octets;
      __le32 rmac_discarded_frms;
      __le32 rmac_accepted_nucst_frms;
      __le32 reserved_1;
      __le32 rmac_drop_events;
      __le64 rmac_ttl_less_fb_octets;
      __le64 rmac_ttl_frms;
      __le64 reserved_2;
      __le32 rmac_usized_frms;
      __le32 reserved_3;
      __le32 rmac_frag_frms;
      __le32 rmac_osized_frms;
      __le32 reserved_4;
      __le32 rmac_jabber_frms;
      __le64 rmac_ttl_64_frms;
      __le64 rmac_ttl_65_127_frms;
      __le64 reserved_5;
      __le64 rmac_ttl_128_255_frms;
      __le64 rmac_ttl_256_511_frms;
      __le64 reserved_6;
      __le64 rmac_ttl_512_1023_frms;
      __le64 rmac_ttl_1024_1518_frms;
      __le32 rmac_ip;
      __le32 reserved_7;
      __le64 rmac_ip_octets;
      __le32 rmac_drop_ip;
      __le32 rmac_hdr_err_ip;
      __le32 reserved_8;
      __le32 rmac_icmp;
      __le64 rmac_tcp;
      __le32 rmac_err_drp_udp;
      __le32 rmac_udp;
      __le64 rmac_xgmii_err_sym;
      __le64 rmac_frms_q0;
      __le64 rmac_frms_q1;
      __le64 rmac_frms_q2;
      __le64 rmac_frms_q3;
      __le64 rmac_frms_q4;
      __le64 rmac_frms_q5;
      __le64 rmac_frms_q6;
      __le64 rmac_frms_q7;
      __le16 rmac_full_q3;
      __le16 rmac_full_q2;
      __le16 rmac_full_q1;
      __le16 rmac_full_q0;
      __le16 rmac_full_q7;
      __le16 rmac_full_q6;
      __le16 rmac_full_q5;
      __le16 rmac_full_q4;
      __le32 reserved_9;
      __le32 rmac_pause_cnt;
      __le64 rmac_xgmii_data_err_cnt;
      __le64 rmac_xgmii_ctrl_err_cnt;
      __le32 rmac_err_tcp;
      __le32 rmac_accepted_ip;

/* PCI/PCI-X Read transaction statistics. */
      __le32 new_rd_req_cnt;
      __le32 rd_req_cnt;
      __le32 rd_rtry_cnt;
      __le32 new_rd_req_rtry_cnt;

/* PCI/PCI-X Write/Read transaction statistics. */
      __le32 wr_req_cnt;
      __le32 wr_rtry_rd_ack_cnt;
      __le32 new_wr_req_rtry_cnt;
      __le32 new_wr_req_cnt;
      __le32 wr_disc_cnt;
      __le32 wr_rtry_cnt;

/*    PCI/PCI-X Write / DMA Transaction statistics. */
      __le32 txp_wr_cnt;
      __le32 rd_rtry_wr_ack_cnt;
      __le32 txd_wr_cnt;
      __le32 txd_rd_cnt;
      __le32 rxd_wr_cnt;
      __le32 rxd_rd_cnt;
      __le32 rxf_wr_cnt;
      __le32 txf_rd_cnt;

/* Tx MAC statistics overflow counters. */
      __le32 tmac_data_octets_oflow;
      __le32 tmac_frms_oflow;
      __le32 tmac_bcst_frms_oflow;
      __le32 tmac_mcst_frms_oflow;
      __le32 tmac_ucst_frms_oflow;
      __le32 tmac_ttl_octets_oflow;
      __le32 tmac_any_err_frms_oflow;
      __le32 tmac_nucst_frms_oflow;
      __le64 tmac_vlan_frms;
      __le32 tmac_drop_ip_oflow;
      __le32 tmac_vld_ip_oflow;
      __le32 tmac_rst_tcp_oflow;
      __le32 tmac_icmp_oflow;
      __le32 tpa_unknown_protocol;
      __le32 tmac_udp_oflow;
      __le32 reserved_10;
      __le32 tpa_parse_failure;

/* Rx MAC Statistics overflow counters. */
      __le32 rmac_data_octets_oflow;
      __le32 rmac_vld_frms_oflow;
      __le32 rmac_vld_bcst_frms_oflow;
      __le32 rmac_vld_mcst_frms_oflow;
      __le32 rmac_accepted_ucst_frms_oflow;
      __le32 rmac_ttl_octets_oflow;
      __le32 rmac_discarded_frms_oflow;
      __le32 rmac_accepted_nucst_frms_oflow;
      __le32 rmac_usized_frms_oflow;
      __le32 rmac_drop_events_oflow;
      __le32 rmac_frag_frms_oflow;
      __le32 rmac_osized_frms_oflow;
      __le32 rmac_ip_oflow;
      __le32 rmac_jabber_frms_oflow;
      __le32 rmac_icmp_oflow;
      __le32 rmac_drop_ip_oflow;
      __le32 rmac_err_drp_udp_oflow;
      __le32 rmac_udp_oflow;
      __le32 reserved_11;
      __le32 rmac_pause_cnt_oflow;
      __le64 rmac_ttl_1519_4095_frms;
      __le64 rmac_ttl_4096_8191_frms;
      __le64 rmac_ttl_8192_max_frms;
      __le64 rmac_ttl_gt_max_frms;
      __le64 rmac_osized_alt_frms;
      __le64 rmac_jabber_alt_frms;
      __le64 rmac_gt_max_alt_frms;
      __le64 rmac_vlan_frms;
      __le32 rmac_len_discard;
      __le32 rmac_fcs_discard;
      __le32 rmac_pf_discard;
      __le32 rmac_da_discard;
      __le32 rmac_red_discard;
      __le32 rmac_rts_discard;
      __le32 reserved_12;
      __le32 rmac_ingm_full_discard;
      __le32 reserved_13;
      __le32 rmac_accepted_ip_oflow;
      __le32 reserved_14;
      __le32 link_fault_cnt;
      u8  buffer[20];
      struct swStat sw_stat;
      struct xpakStat xpak_stat;

/* Default value for 'vlan_strip_tag' configuration parameter */

 * Structures representing different init time configuration
 * parameters of the NIC.

#define MAX_TX_FIFOS 8
#define MAX_RX_RINGS 8


/* FIFO mappings for all possible number of fifos configured */
static int fifo_map[][MAX_TX_FIFOS] = {
      {0, 0, 0, 0, 0, 0, 0, 0},
      {0, 0, 0, 0, 1, 1, 1, 1},
      {0, 0, 0, 1, 1, 1, 2, 2},
      {0, 0, 1, 1, 2, 2, 3, 3},
      {0, 0, 1, 1, 2, 2, 3, 4},
      {0, 0, 1, 1, 2, 3, 4, 5},
      {0, 0, 1, 2, 3, 4, 5, 6},
      {0, 1, 2, 3, 4, 5, 6, 7},

/* Maintains Per FIFO related information. */
struct tx_fifo_config {
#define     MAX_AVAILABLE_TXDS      8192
      u32 fifo_len;           /* specifies len of FIFO upto 8192, ie no of TxDLs */
/* Priority definition */
#define TX_FIFO_PRI_0               0     /*Highest */
#define TX_FIFO_PRI_1               1
#define TX_FIFO_PRI_2               2
#define TX_FIFO_PRI_3               3
#define TX_FIFO_PRI_4               4
#define TX_FIFO_PRI_5               5
#define TX_FIFO_PRI_6               6
#define TX_FIFO_PRI_7               7     /*lowest */
      u8 fifo_priority; /* specifies pointer level for FIFO */
      /* user should not set twos fifos with same pri */
      u8 f_no_snoop;
#define NO_SNOOP_TXD                0x01
#define NO_SNOOP_TXD_BUFFER          0x02

/* Maintains per Ring related information */
struct rx_ring_config {
      u32 num_rxd;            /*No of RxDs per Rx Ring */
#define RX_RING_PRI_0               0     /* highest */
#define RX_RING_PRI_1               1
#define RX_RING_PRI_2               2
#define RX_RING_PRI_3               3
#define RX_RING_PRI_4               4
#define RX_RING_PRI_5               5
#define RX_RING_PRI_6               6
#define RX_RING_PRI_7               7     /* lowest */

      u8 ring_priority; /*Specifies service priority of ring */
      /* OSM should not set any two rings with same priority */
      u8 ring_org;            /*Organization of ring */
#define RING_ORG_BUFF1        0x01
#define RX_RING_ORG_BUFF3     0x03
#define RX_RING_ORG_BUFF5     0x05

      u8 f_no_snoop;
#define NO_SNOOP_RXD                0x01
#define NO_SNOOP_RXD_BUFFER         0x02

/* This structure provides contains values of the tunable parameters
 * of the H/W
struct config_param {
/* Tx Side */
      u32 tx_fifo_num;  /*Number of Tx FIFOs */

      u8 fifo_mapping[MAX_TX_FIFOS];
      struct tx_fifo_config tx_cfg[MAX_TX_FIFOS];     /*Per-Tx FIFO config */
      u32 max_txds;           /*Max no. of Tx buffer descriptor per TxDL */
      u64 tx_intr_type;
#define INTA      0
#define MSI_X     2
      u8 intr_type;
      u8 napi;

      /* Specifies if Tx Intr is UTILZ or PER_LIST type. */

/* Rx Side */
      u32 rx_ring_num;  /*Number of receive rings */

      struct rx_ring_config rx_cfg[MAX_RX_RINGS];     /*Per-Rx Ring config */

#define HEADER_ETHERNET_II_802_3_SIZE 14
#define HEADER_802_2_SIZE              3
#define HEADER_SNAP_SIZE               5
#define HEADER_VLAN_SIZE               4

#define MIN_MTU                       46
#define MAX_PYLD                    1500
#define MAX_MTU                     (MAX_PYLD+18)
#define MAX_MTU_VLAN                (MAX_PYLD+22)
#define MAX_PYLD_JUMBO              9600
#define MAX_MTU_JUMBO               (MAX_PYLD_JUMBO+18)
#define MAX_MTU_JUMBO_VLAN          (MAX_PYLD_JUMBO+22)
      u16 bus_speed;

/* Structure representing MAC Addrs */
struct mac_addr {
      u8 mac_addr[ETH_ALEN];

/* Structure that represent every FIFO element in the BAR1
 * Address location.
struct TxFIFO_element {
      u64 TxDL_Pointer;

      u64 List_Control;
#define TX_FIFO_LAST_TXD_NUM( val)     vBIT(val,0,8)
#define TX_FIFO_FIRST_LIST             s2BIT(14)
#define TX_FIFO_LAST_LIST              s2BIT(15)
#define TX_FIFO_FIRSTNLAST_LIST        vBIT(3,14,2)
#define TX_FIFO_SPECIAL_FUNC           s2BIT(23)
#define TX_FIFO_DS_NO_SNOOP            s2BIT(31)
#define TX_FIFO_BUFF_NO_SNOOP          s2BIT(30)

/* Tx descriptor structure */
struct TxD {
      u64 Control_1;
/* bit mask */
#define TXD_LIST_OWN_XENA       s2BIT(7)
#define TXD_T_CODE              (s2BIT(12)|s2BIT(13)|s2BIT(14)|s2BIT(15))
#define TXD_T_CODE_OK(val)      (|(val & TXD_T_CODE))
#define GET_TXD_T_CODE(val)     ((val & TXD_T_CODE)<<12)
#define TXD_GATHER_CODE         (s2BIT(22) | s2BIT(23))
#define TXD_GATHER_CODE_LAST    s2BIT(23)
#define TXD_TCP_LSO_EN          s2BIT(30)
#define TXD_UDP_COF_EN          s2BIT(31)
#define TXD_UFO_EN            s2BIT(31) | s2BIT(30)
#define TXD_TCP_LSO_MSS(val)    vBIT(val,34,14)
#define TXD_UFO_MSS(val)      vBIT(val,34,14)
#define TXD_BUFFER0_SIZE(val)   vBIT(val,48,16)

      u64 Control_2;
#define TXD_TX_CKO_CONTROL      (s2BIT(5)|s2BIT(6)|s2BIT(7))
#define TXD_TX_CKO_IPV4_EN      s2BIT(5)
#define TXD_TX_CKO_TCP_EN       s2BIT(6)
#define TXD_TX_CKO_UDP_EN       s2BIT(7)
#define TXD_VLAN_ENABLE         s2BIT(15)
#define TXD_VLAN_TAG(val)       vBIT(val,16,16)
#define TXD_INT_NUMBER(val)     vBIT(val,34,6)
#define TXD_INT_TYPE_PER_LIST   s2BIT(47)
#define TXD_INT_TYPE_UTILZ      s2BIT(46)
#define TXD_SET_MARKER         vBIT(0x6,0,4)

      u64 Buffer_Pointer;
      u64 Host_Control; /* reserved for host */

/* Structure to hold the phy and virt addr of every TxDL. */
struct list_info_hold {
      dma_addr_t list_phy_addr;
      void *list_virt_addr;

/* Rx descriptor structure for 1 buffer mode */
struct RxD_t {
      u64 Host_Control; /* reserved for host */
      u64 Control_1;
#define RXD_OWN_XENA            s2BIT(7)
#define RXD_T_CODE              (s2BIT(12)|s2BIT(13)|s2BIT(14)|s2BIT(15))
#define RXD_FRAME_PROTO         vBIT(0xFFFF,24,8)
#define RXD_FRAME_PROTO_IPV4    s2BIT(27)
#define RXD_FRAME_PROTO_IPV6    s2BIT(28)
#define RXD_FRAME_IP_FRAG     s2BIT(29)
#define RXD_FRAME_PROTO_TCP     s2BIT(30)
#define RXD_FRAME_PROTO_UDP     s2BIT(31)
#define RXD_GET_L3_CKSUM(val)   ((u16)(val>> 16) & 0xFFFF)
#define RXD_GET_L4_CKSUM(val)   ((u16)(val) & 0xFFFF)

      u64 Control_2;
#define     THE_RXD_MARK            0x3
#define     SET_RXD_MARKER          vBIT(THE_RXD_MARK, 0, 2)
#define     GET_RXD_MARKER(ctrl)    ((ctrl & SET_RXD_MARKER) >> 62)

#define MASK_VLAN_TAG           vBIT(0xFFFF,48,16)
#define SET_VLAN_TAG(val)       vBIT(val,48,16)
#define SET_NUM_TAG(val)       vBIT(val,16,32)

/* Rx descriptor structure for 1 buffer mode */
struct RxD1 {
      struct RxD_t h;

#define MASK_BUFFER0_SIZE_1       vBIT(0x3FFF,2,14)
#define SET_BUFFER0_SIZE_1(val)   vBIT(val,2,14)
#define RXD_GET_BUFFER0_SIZE_1(_Control_2) \
      (u16)((_Control_2 & MASK_BUFFER0_SIZE_1) >> 48)
      u64 Buffer0_ptr;
/* Rx descriptor structure for 3 or 2 buffer mode */

struct RxD3 {
      struct RxD_t h;

#define MASK_BUFFER0_SIZE_3       vBIT(0xFF,2,14)
#define MASK_BUFFER1_SIZE_3       vBIT(0xFFFF,16,16)
#define MASK_BUFFER2_SIZE_3       vBIT(0xFFFF,32,16)
#define SET_BUFFER0_SIZE_3(val)   vBIT(val,8,8)
#define SET_BUFFER1_SIZE_3(val)   vBIT(val,16,16)
#define SET_BUFFER2_SIZE_3(val)   vBIT(val,32,16)
#define RXD_GET_BUFFER0_SIZE_3(Control_2) \
      (u8)((Control_2 & MASK_BUFFER0_SIZE_3) >> 48)
#define RXD_GET_BUFFER1_SIZE_3(Control_2) \
      (u16)((Control_2 & MASK_BUFFER1_SIZE_3) >> 32)
#define RXD_GET_BUFFER2_SIZE_3(Control_2) \
      (u16)((Control_2 & MASK_BUFFER2_SIZE_3) >> 16)
#define BUF0_LEN  40
#define BUF1_LEN  1

      u64 Buffer0_ptr;
      u64 Buffer1_ptr;
      u64 Buffer2_ptr;

/* Structure that represents the Rx descriptor block which contains
 * 128 Rx descriptors.
struct RxD_block {
#define MAX_RXDS_PER_BLOCK_1            127
      struct RxD1 rxd[MAX_RXDS_PER_BLOCK_1];

      u64 reserved_0;
      u64 reserved_1;         /* 0xFEFFFFFFFFFFFFFF to mark last
                         * Rxd in this blk */
      u64 reserved_2_pNext_RxD_block;     /* Logical ptr to next */
      u64 pNext_RxD_Blk_physical;   /* Buff0_ptr.In a 32 bit arch
                               * the upper 32 bits should
                               * be 0 */

#define SIZE_OF_BLOCK   4096

#define RXD_MODE_1      0 /* One Buffer mode */
#define RXD_MODE_3B     1 /* Two Buffer mode */

/* Structure to hold virtual addresses of Buf0 and Buf1 in
 * 2buf mode. */
struct buffAdd {
      void *ba_0_org;
      void *ba_1_org;
      void *ba_0;
      void *ba_1;

/* Structure which stores all the MAC control parameters */

/* This structure stores the offset of the RxD in the ring
 * from which the Rx Interrupt processor can start picking
 * up the RxDs for processing.
struct rx_curr_get_info {
      u32 block_index;
      u32 offset;
      u32 ring_len;

struct rx_curr_put_info {
      u32 block_index;
      u32 offset;
      u32 ring_len;

/* This structure stores the offset of the TxDl in the FIFO
 * from which the Tx Interrupt processor can start picking
 * up the TxDLs for send complete interrupt processing.
struct tx_curr_get_info {
      u32 offset;
      u32 fifo_len;

struct tx_curr_put_info {
      u32 offset;
      u32 fifo_len;

struct rxd_info {
      void *virt_addr;
      dma_addr_t dma_addr;

/* Structure that holds the Phy and virt addresses of the Blocks */
struct rx_block_info {
      void *block_virt_addr;
      dma_addr_t block_dma_addr;
      struct rxd_info *rxds;

/* Ring specific structure */
struct ring_info {
      /* The ring number */
      int ring_no;

       *  Place holders for the virtual and physical addresses of
       *  all the Rx Blocks
      struct rx_block_info rx_blocks[MAX_RX_BLOCKS_PER_RING];
      int block_count;
      int pkt_cnt;

       * Put pointer info which indictes which RxD has to be replenished
       * with a new buffer.
      struct rx_curr_put_info rx_curr_put_info;

       * Get pointer info which indictes which is the last RxD that was
       * processed by the driver.
      struct rx_curr_get_info rx_curr_get_info;

      /* Index to the absolute position of the put pointer of Rx ring */
      int put_pos;

      /* Buffer Address store. */
      struct buffAdd **ba;
      struct s2io_nic *nic;

/* Fifo specific structure */
struct fifo_info {
      /* FIFO number */
      int fifo_no;

      /* Maximum TxDs per TxDL */
      int max_txds;

      /* Place holder of all the TX List's Phy and Virt addresses. */
      struct list_info_hold *list_info;

       * Current offset within the tx FIFO where driver would write
       * new Tx frame
      struct tx_curr_put_info tx_curr_put_info;

       * Current offset within tx FIFO from where the driver would start freeing
       * the buffers
      struct tx_curr_get_info tx_curr_get_info;

      struct s2io_nic *nic;

/* Information related to the Tx and Rx FIFOs and Rings of Xena
 * is maintained in this structure.
struct mac_info {
/* tx side stuff */
      /* logical pointer of start of each Tx FIFO */
      struct TxFIFO_element __iomem *tx_FIFO_start[MAX_TX_FIFOS];

      /* Fifo specific structure */
      struct fifo_info fifos[MAX_TX_FIFOS];

      /* Save virtual address of TxD page with zero DMA addr(if any) */
      void *zerodma_virt_addr;

/* rx side stuff */
      /* Ring specific structure */
      struct ring_info rings[MAX_RX_RINGS];

      u16 rmac_pause_time;
      u16 mc_pause_threshold_q0q3;
      u16 mc_pause_threshold_q4q7;

      void *stats_mem;  /* orignal pointer to allocated mem */
      dma_addr_t stats_mem_phy;     /* Physical address of the stat block */
      u32 stats_mem_sz;
      struct stat_block *stats_info;      /* Logical address of the stat block */

/* structure representing the user defined MAC addresses */
struct usr_addr {
      char addr[ETH_ALEN];
      int usage_cnt;

/* Default Tunable parameters of the NIC. */
#define DEFAULT_FIFO_0_LEN 4096
#define DEFAULT_FIFO_1_7_LEN 512
#define SMALL_BLK_CNT   30
#define LARGE_BLK_CNT   100

 * Structure to keep track of the MSI-X vectors and the corresponding
 * argument registered against each vector
#define MAX_REQUESTED_MSI_X   17
struct s2io_msix_entry
      u16 vector;
      u16 entry;
      void *arg;

      u8 type;
#define     MSIX_FIFO_TYPE    1
#define     MSIX_RING_TYPE    2

      u8 in_use;

struct msix_info_st {
      u64 addr;
      u64 data;

/* Data structure to represent a LRO session */
struct lro {
      struct sk_buff    *parent;
      struct sk_buff  *last_frag;
      u8          *l2h;
      struct iphdr      *iph;
      struct tcphdr     *tcph;
      u32         tcp_next_seq;
      __be32            tcp_ack;
      int         total_len;
      int         frags_len;
      int         sg_num;
      int         in_use;
      __be16            window;
      u32         cur_tsval;
      u32         cur_tsecr;
      u8          saw_ts;

/* These flags represent the devices temporary state */
enum s2io_device_state_t

/* Structure representing one instance of the NIC */
struct s2io_nic {
      int rxd_mode;
       * Count of packets to be processed in a given iteration, it will be indicated
       * by the quota field of the device structure when NAPI is enabled.
      int pkts_to_process;
      struct net_device *dev;
      struct napi_struct napi;
      struct mac_info mac_control;
      struct config_param config;
      struct pci_dev *pdev;
      void __iomem *bar0;
      void __iomem *bar1;
#define MAX_MAC_SUPPORTED   16

      struct mac_addr def_mac_addr[MAX_MAC_SUPPORTED];

      struct net_device_stats stats;
      int high_dma_flag;
      int device_enabled_once;

      char name[60];
      struct tasklet_struct task;
      volatile unsigned long tasklet_status;

      /* Timer that handles I/O errors/exceptions */
      struct timer_list alarm_timer;

      /* Space to back up the PCI config space */
      u32 config_space[256 / sizeof(u32)];

      atomic_t rx_bufs_left[MAX_RX_RINGS];

      spinlock_t tx_lock;
      spinlock_t put_lock;

#define PROMISC     1
#define ALL_MULTI   2

      u16 usr_addr_count;
      u16 mc_addr_count;
      struct usr_addr usr_addrs[MAX_ADDRS_SUPPORTED];

      u16 m_cast_flg;
      u16 all_multi_pos;
      u16 promisc_flg;

      /*  Id timer, used to blink NIC to physically identify NIC. */
      struct timer_list id_timer;

      /*  Restart timer, used to restart NIC if the device is stuck and
       *  a schedule task that will set the correct Link state once the
       *  NIC's PHY has stabilized after a state change.
      struct work_struct rst_timer_task;
      struct work_struct set_link_task;

      /* Flag that can be used to turn on or turn off the Rx checksum
       * offload feature.
      int rx_csum;

      /*  after blink, the adapter must be restored with original
       *  values.
      u64 adapt_ctrl_org;

      /* Last known link state. */
      u16 last_link_state;
#define     LINK_DOWN   1
#define     LINK_UP           2

      int task_flag;
      unsigned long long start_time;
      struct vlan_group *vlgrp;
#define MSIX_FLG                0xA5
      struct msix_entry *entries;
      int msi_detected;
      wait_queue_head_t msi_wait;
      struct s2io_msix_entry *s2io_entries;
      char desc[MAX_REQUESTED_MSI_X][25];

      int avail_msix_vectors; /* No. of MSI-X vectors granted by system */

      struct msix_info_st msix_info[0x3f];

#define XFRAME_I_DEVICE       1
#define XFRAME_II_DEVICE      2
      u8 device_type;

#define MAX_LRO_SESSIONS      32
      struct lro lro0_n[MAX_LRO_SESSIONS];
      unsigned long     clubbed_frms_cnt;
      unsigned long     sending_both;
      u8          lro;
      u16         lro_max_aggr_per_sess;
      volatile unsigned long state;
      spinlock_t  rx_lock;
      u64         general_int_mask;
      u64 *ufo_in_band_v;
#define VPD_STRING_LEN 80
      u8  product_name[VPD_STRING_LEN];
      u8  serial_num[VPD_STRING_LEN];

#define RESET_ERROR 1;
#define CMD_ERROR   2;

/*  OS related system calls */
#ifndef readq
static inline u64 readq(void __iomem *addr)
      u64 ret = 0;
      ret = readl(addr + 4);
      ret <<= 32;
      ret |= readl(addr);

      return ret;

#ifndef writeq
static inline void writeq(u64 val, void __iomem *addr)
      writel((u32) (val), addr);
      writel((u32) (val >> 32), (addr + 4));

 * Some registers have to be written in a particular order to
 * expect correct hardware operation. The macro SPECIAL_REG_WRITE
 * is used to perform such ordered writes. Defines UF (Upper First)
 * and LF (Lower First) will be used to specify the required write order.
#define UF  1
#define LF  2
static inline void SPECIAL_REG_WRITE(u64 val, void __iomem *addr, int order)
      u32 ret;

      if (order == LF) {
            writel((u32) (val), addr);
            ret = readl(addr);
            writel((u32) (val >> 32), (addr + 4));
            ret = readl(addr + 4);
      } else {
            writel((u32) (val >> 32), (addr + 4));
            ret = readl(addr + 4);
            writel((u32) (val), addr);
            ret = readl(addr);

/*  Interrupt related values of Xena */

#define ENABLE_INTRS    1
#define DISABLE_INTRS   2

/*  Highest level interrupt blocks */
#define TX_PIC_INTR     (0x0001<<0)
#define TX_DMA_INTR     (0x0001<<1)
#define TX_MAC_INTR     (0x0001<<2)
#define TX_XGXS_INTR    (0x0001<<3)
#define TX_TRAFFIC_INTR (0x0001<<4)
#define RX_PIC_INTR     (0x0001<<5)
#define RX_DMA_INTR     (0x0001<<6)
#define RX_MAC_INTR     (0x0001<<7)
#define RX_XGXS_INTR    (0x0001<<8)
#define RX_TRAFFIC_INTR (0x0001<<9)
#define MC_INTR         (0x0001<<10)
#define ENA_ALL_INTRS    (   TX_PIC_INTR     | \
                            TX_DMA_INTR     | \
                            TX_MAC_INTR     | \
                            TX_XGXS_INTR    | \
                            TX_TRAFFIC_INTR | \
                            RX_PIC_INTR     | \
                            RX_DMA_INTR     | \
                            RX_MAC_INTR     | \
                            RX_XGXS_INTR    | \
                            RX_TRAFFIC_INTR | \
                            MC_INTR )

/*  Interrupt masks for the general interrupt mask register */

#define TXPIC_INT_M         s2BIT(0)
#define TXDMA_INT_M         s2BIT(1)
#define TXMAC_INT_M         s2BIT(2)
#define TXXGXS_INT_M        s2BIT(3)
#define TXTRAFFIC_INT_M     s2BIT(8)
#define PIC_RX_INT_M        s2BIT(32)
#define RXDMA_INT_M         s2BIT(33)
#define RXMAC_INT_M         s2BIT(34)
#define MC_INT_M            s2BIT(35)
#define RXXGXS_INT_M        s2BIT(36)
#define RXTRAFFIC_INT_M     s2BIT(40)

/*  PIC level Interrupts TODO*/

/*  DMA level Inressupts */
#define TXDMA_PFC_INT_M     s2BIT(0)
#define TXDMA_PCC_INT_M     s2BIT(2)

/*  PFC block interrupts */
#define PFC_MISC_ERR_1      s2BIT(0)      /* Interrupt to indicate FIFO full */

/* PCC block interrupts. */
#define     PCC_FB_ECC_ERR       vBIT(0xff, 16, 8)    /* Interrupt to indicate
                                       PCC_FB_ECC Error. */

#define RXD_GET_VLAN_TAG(Control_2) (u16)(Control_2 & MASK_VLAN_TAG)
 * Prototype declaration.
static int __devinit s2io_init_nic(struct pci_dev *pdev,
                           const struct pci_device_id *pre);
static void __devexit s2io_rem_nic(struct pci_dev *pdev);
static int init_shared_mem(struct s2io_nic *sp);
static void free_shared_mem(struct s2io_nic *sp);
static int init_nic(struct s2io_nic *nic);
static void rx_intr_handler(struct ring_info *ring_data);
static void tx_intr_handler(struct fifo_info *fifo_data);
static void s2io_handle_errors(void * dev_id);

static int s2io_starter(void);
static void s2io_closer(void);
static void s2io_tx_watchdog(struct net_device *dev);
static void s2io_tasklet(unsigned long dev_addr);
static void s2io_set_multicast(struct net_device *dev);
static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp);
static void s2io_link(struct s2io_nic * sp, int link);
static void s2io_reset(struct s2io_nic * sp);
static int s2io_poll(struct napi_struct *napi, int budget);
static void s2io_init_pci(struct s2io_nic * sp);
static int do_s2io_prog_unicast(struct net_device *dev, u8 *addr);
static void s2io_alarm_handle(unsigned long data);
static irqreturn_t
s2io_msix_ring_handle(int irq, void *dev_id);
static irqreturn_t
s2io_msix_fifo_handle(int irq, void *dev_id);
static irqreturn_t s2io_isr(int irq, void *dev_id);
static int verify_xena_quiescence(struct s2io_nic *sp);
static const struct ethtool_ops netdev_ethtool_ops;
static void s2io_set_link(struct work_struct *work);
static int s2io_set_swapper(struct s2io_nic * sp);
static void s2io_card_down(struct s2io_nic *nic);
static int s2io_card_up(struct s2io_nic *nic);
static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit,
                              int bit_state);
static int s2io_add_isr(struct s2io_nic * sp);
static void s2io_rem_isr(struct s2io_nic * sp);

static void restore_xmsi_data(struct s2io_nic *nic);

static int
s2io_club_tcp_session(u8 *buffer, u8 **tcp, u32 *tcp_len, struct lro **lro,
                  struct RxD_t *rxdp, struct s2io_nic *sp);
static void clear_lro_session(struct lro *lro);
static void queue_rx_frame(struct sk_buff *skb);
static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro);
static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
                     struct sk_buff *skb, u32 tcp_len);
static int rts_ds_steer(struct s2io_nic *nic, u8 ds_codepoint, u8 ring);

static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
                                        pci_channel_state_t state);
static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev);
static void s2io_io_resume(struct pci_dev *pdev);

#define s2io_tcp_mss(skb) skb_shinfo(skb)->gso_size
#define s2io_udp_mss(skb) skb_shinfo(skb)->gso_size
#define s2io_offload_type(skb) skb_shinfo(skb)->gso_type

#define S2IO_PARM_INT(X, def_val) \
      static unsigned int X = def_val;\
            module_param(X , uint, 0);

#endif                        /* _S2IO_H */

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