drivers/net/s2io.h

   1 /************************************************************************
   2  * s2io.h: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
   3  * Copyright(c) 2002-2010 Exar Corp.
   4
   5  * This software may be used and distributed according to the terms of
   6  * the GNU General Public License (GPL), incorporated herein by reference.
   7  * Drivers based on or derived from this code fall under the GPL and must
   8  * retain the authorship, copyright and license notice.  This file is not
   9  * a complete program and may only be used when the entire operating
  10  * system is licensed under the GPL.
  11  * See the file COPYING in this distribution for more information.
  12  ************************************************************************/
  13 #ifndef _S2IO_H
  14 #define _S2IO_H
  15
  16 #define TBD 0
  17 #define s2BIT(loc)              (0x8000000000000000ULL >> (loc))
  18 #define vBIT(val, loc, sz)      (((u64)val) << (64-loc-sz))
  19 #define INV(d)  ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff)
  20
  21 #undef SUCCESS
  22 #define SUCCESS 0
  23 #define FAILURE -1
  24 #define S2IO_MINUS_ONE 0xFFFFFFFFFFFFFFFFULL
  25 #define S2IO_DISABLE_MAC_ENTRY 0xFFFFFFFFFFFFULL
  26 #define S2IO_MAX_PCI_CONFIG_SPACE_REINIT 100
  27 #define S2IO_BIT_RESET 1
  28 #define S2IO_BIT_SET 2
  29 #define CHECKBIT(value, nbit) (value & (1 << nbit))
  30
  31 /* Maximum time to flicker LED when asked to identify NIC using ethtool */
  32 #define MAX_FLICKER_TIME        60000 /* 60 Secs */
  33
  34 /* Maximum outstanding splits to be configured into xena. */
  35 enum {
  36         XENA_ONE_SPLIT_TRANSACTION = 0,
  37         XENA_TWO_SPLIT_TRANSACTION = 1,
  38         XENA_THREE_SPLIT_TRANSACTION = 2,
  39         XENA_FOUR_SPLIT_TRANSACTION = 3,
  40         XENA_EIGHT_SPLIT_TRANSACTION = 4,
  41         XENA_TWELVE_SPLIT_TRANSACTION = 5,
  42         XENA_SIXTEEN_SPLIT_TRANSACTION = 6,
  43         XENA_THIRTYTWO_SPLIT_TRANSACTION = 7
  44 };
  45 #define XENA_MAX_OUTSTANDING_SPLITS(n) (n << 4)
  46
  47 /*  OS concerned variables and constants */
  48 #define WATCH_DOG_TIMEOUT               15*HZ
  49 #define EFILL                           0x1234
  50 #define ALIGN_SIZE                      127
  51 #define PCIX_COMMAND_REGISTER           0x62
  52
  53 /*
  54  * Debug related variables.
  55  */
  56 /* different debug levels. */
  57 #define ERR_DBG         0
  58 #define INIT_DBG        1
  59 #define INFO_DBG        2
  60 #define TX_DBG          3
  61 #define INTR_DBG        4
  62
  63 /* Global variable that defines the present debug level of the driver. */
  64 static int debug_level = ERR_DBG;
  65
  66 /* DEBUG message print. */
  67 #define DBG_PRINT(dbg_level, fmt, args...) do {                 \
  68         if (dbg_level <= debug_level)                           \
  69                 pr_info(fmt, ##args);                           \
  70         } while (0)
  71
  72 /* Protocol assist features of the NIC */
  73 #define L3_CKSUM_OK 0xFFFF
  74 #define L4_CKSUM_OK 0xFFFF
  75 #define S2IO_JUMBO_SIZE 9600
  76
  77 /* Driver statistics maintained by driver */
  78 struct swStat {
  79         unsigned long long single_ecc_errs;
  80         unsigned long long double_ecc_errs;
  81         unsigned long long parity_err_cnt;
  82         unsigned long long serious_err_cnt;
  83         unsigned long long soft_reset_cnt;
  84         unsigned long long fifo_full_cnt;
  85         unsigned long long ring_full_cnt[8];
  86         /* LRO statistics */
  87         unsigned long long clubbed_frms_cnt;
  88         unsigned long long sending_both;
  89         unsigned long long outof_sequence_pkts;
  90         unsigned long long flush_max_pkts;
  91         unsigned long long sum_avg_pkts_aggregated;
  92         unsigned long long num_aggregations;
  93         /* Other statistics */
  94         unsigned long long mem_alloc_fail_cnt;
  95         unsigned long long pci_map_fail_cnt;
  96         unsigned long long watchdog_timer_cnt;
  97         unsigned long long mem_allocated;
  98         unsigned long long mem_freed;
  99         unsigned long long link_up_cnt;
 100         unsigned long long link_down_cnt;
 101         unsigned long long link_up_time;
 102         unsigned long long link_down_time;
 103
 104         /* Transfer Code statistics */
 105         unsigned long long tx_buf_abort_cnt;
 106         unsigned long long tx_desc_abort_cnt;
 107         unsigned long long tx_parity_err_cnt;
 108         unsigned long long tx_link_loss_cnt;
 109         unsigned long long tx_list_proc_err_cnt;
 110
 111         unsigned long long rx_parity_err_cnt;
 112         unsigned long long rx_abort_cnt;
 113         unsigned long long rx_parity_abort_cnt;
 114         unsigned long long rx_rda_fail_cnt;
 115         unsigned long long rx_unkn_prot_cnt;
 116         unsigned long long rx_fcs_err_cnt;
 117         unsigned long long rx_buf_size_err_cnt;
 118         unsigned long long rx_rxd_corrupt_cnt;
 119         unsigned long long rx_unkn_err_cnt;
 120
 121         /* Error/alarm statistics*/
 122         unsigned long long tda_err_cnt;
 123         unsigned long long pfc_err_cnt;
 124         unsigned long long pcc_err_cnt;
 125         unsigned long long tti_err_cnt;
 126         unsigned long long lso_err_cnt;
 127         unsigned long long tpa_err_cnt;
 128         unsigned long long sm_err_cnt;
 129         unsigned long long mac_tmac_err_cnt;
 130         unsigned long long mac_rmac_err_cnt;
 131         unsigned long long xgxs_txgxs_err_cnt;
 132         unsigned long long xgxs_rxgxs_err_cnt;
 133         unsigned long long rc_err_cnt;
 134         unsigned long long prc_pcix_err_cnt;
 135         unsigned long long rpa_err_cnt;
 136         unsigned long long rda_err_cnt;
 137         unsigned long long rti_err_cnt;
 138         unsigned long long mc_err_cnt;
 139
 140 };
 141
 142 /* Xpak releated alarm and warnings */
 143 struct xpakStat {
 144         u64 alarm_transceiver_temp_high;
 145         u64 alarm_transceiver_temp_low;
 146         u64 alarm_laser_bias_current_high;
 147         u64 alarm_laser_bias_current_low;
 148         u64 alarm_laser_output_power_high;
 149         u64 alarm_laser_output_power_low;
 150         u64 warn_transceiver_temp_high;
 151         u64 warn_transceiver_temp_low;
 152         u64 warn_laser_bias_current_high;
 153         u64 warn_laser_bias_current_low;
 154         u64 warn_laser_output_power_high;
 155         u64 warn_laser_output_power_low;
 156         u64 xpak_regs_stat;
 157         u32 xpak_timer_count;
 158 };
 159
 160
 161 /* The statistics block of Xena */
 162 struct stat_block {
 163 /* Tx MAC statistics counters. */
 164         __le32 tmac_data_octets;
 165         __le32 tmac_frms;
 166         __le64 tmac_drop_frms;
 167         __le32 tmac_bcst_frms;
 168         __le32 tmac_mcst_frms;
 169         __le64 tmac_pause_ctrl_frms;
 170         __le32 tmac_ucst_frms;
 171         __le32 tmac_ttl_octets;
 172         __le32 tmac_any_err_frms;
 173         __le32 tmac_nucst_frms;
 174         __le64 tmac_ttl_less_fb_octets;
 175         __le64 tmac_vld_ip_octets;
 176         __le32 tmac_drop_ip;
 177         __le32 tmac_vld_ip;
 178         __le32 tmac_rst_tcp;
 179         __le32 tmac_icmp;
 180         __le64 tmac_tcp;
 181         __le32 reserved_0;
 182         __le32 tmac_udp;
 183
 184 /* Rx MAC Statistics counters. */
 185         __le32 rmac_data_octets;
 186         __le32 rmac_vld_frms;
 187         __le64 rmac_fcs_err_frms;
 188         __le64 rmac_drop_frms;
 189         __le32 rmac_vld_bcst_frms;
 190         __le32 rmac_vld_mcst_frms;
 191         __le32 rmac_out_rng_len_err_frms;
 192         __le32 rmac_in_rng_len_err_frms;
 193         __le64 rmac_long_frms;
 194         __le64 rmac_pause_ctrl_frms;
 195         __le64 rmac_unsup_ctrl_frms;
 196         __le32 rmac_accepted_ucst_frms;
 197         __le32 rmac_ttl_octets;
 198         __le32 rmac_discarded_frms;
 199         __le32 rmac_accepted_nucst_frms;
 200         __le32 reserved_1;
 201         __le32 rmac_drop_events;
 202         __le64 rmac_ttl_less_fb_octets;
 203         __le64 rmac_ttl_frms;
 204         __le64 reserved_2;
 205         __le32 rmac_usized_frms;
 206         __le32 reserved_3;
 207         __le32 rmac_frag_frms;
 208         __le32 rmac_osized_frms;
 209         __le32 reserved_4;
 210         __le32 rmac_jabber_frms;
 211         __le64 rmac_ttl_64_frms;
 212         __le64 rmac_ttl_65_127_frms;
 213         __le64 reserved_5;
 214         __le64 rmac_ttl_128_255_frms;
 215         __le64 rmac_ttl_256_511_frms;
 216         __le64 reserved_6;
 217         __le64 rmac_ttl_512_1023_frms;
 218         __le64 rmac_ttl_1024_1518_frms;
 219         __le32 rmac_ip;
 220         __le32 reserved_7;
 221         __le64 rmac_ip_octets;
 222         __le32 rmac_drop_ip;
 223         __le32 rmac_hdr_err_ip;
 224         __le32 reserved_8;
 225         __le32 rmac_icmp;
 226         __le64 rmac_tcp;
 227         __le32 rmac_err_drp_udp;
 228         __le32 rmac_udp;
 229         __le64 rmac_xgmii_err_sym;
 230         __le64 rmac_frms_q0;
 231         __le64 rmac_frms_q1;
 232         __le64 rmac_frms_q2;
 233         __le64 rmac_frms_q3;
 234         __le64 rmac_frms_q4;
 235         __le64 rmac_frms_q5;
 236         __le64 rmac_frms_q6;
 237         __le64 rmac_frms_q7;
 238         __le16 rmac_full_q3;
 239         __le16 rmac_full_q2;
 240         __le16 rmac_full_q1;
 241         __le16 rmac_full_q0;
 242         __le16 rmac_full_q7;
 243         __le16 rmac_full_q6;
 244         __le16 rmac_full_q5;
 245         __le16 rmac_full_q4;
 246         __le32 reserved_9;
 247         __le32 rmac_pause_cnt;
 248         __le64 rmac_xgmii_data_err_cnt;
 249         __le64 rmac_xgmii_ctrl_err_cnt;
 250         __le32 rmac_err_tcp;
 251         __le32 rmac_accepted_ip;
 252
 253 /* PCI/PCI-X Read transaction statistics. */
 254         __le32 new_rd_req_cnt;
 255         __le32 rd_req_cnt;
 256         __le32 rd_rtry_cnt;
 257         __le32 new_rd_req_rtry_cnt;
 258
 259 /* PCI/PCI-X Write/Read transaction statistics. */
 260         __le32 wr_req_cnt;
 261         __le32 wr_rtry_rd_ack_cnt;
 262         __le32 new_wr_req_rtry_cnt;
 263         __le32 new_wr_req_cnt;
 264         __le32 wr_disc_cnt;
 265         __le32 wr_rtry_cnt;
 266
 267 /*      PCI/PCI-X Write / DMA Transaction statistics. */
 268         __le32 txp_wr_cnt;
 269         __le32 rd_rtry_wr_ack_cnt;
 270         __le32 txd_wr_cnt;
 271         __le32 txd_rd_cnt;
 272         __le32 rxd_wr_cnt;
 273         __le32 rxd_rd_cnt;
 274         __le32 rxf_wr_cnt;
 275         __le32 txf_rd_cnt;
 276
 277 /* Tx MAC statistics overflow counters. */
 278         __le32 tmac_data_octets_oflow;
 279         __le32 tmac_frms_oflow;
 280         __le32 tmac_bcst_frms_oflow;
 281         __le32 tmac_mcst_frms_oflow;
 282         __le32 tmac_ucst_frms_oflow;
 283         __le32 tmac_ttl_octets_oflow;
 284         __le32 tmac_any_err_frms_oflow;
 285         __le32 tmac_nucst_frms_oflow;
 286         __le64 tmac_vlan_frms;
 287         __le32 tmac_drop_ip_oflow;
 288         __le32 tmac_vld_ip_oflow;
 289         __le32 tmac_rst_tcp_oflow;
 290         __le32 tmac_icmp_oflow;
 291         __le32 tpa_unknown_protocol;
 292         __le32 tmac_udp_oflow;
 293         __le32 reserved_10;
 294         __le32 tpa_parse_failure;
 295
 296 /* Rx MAC Statistics overflow counters. */
 297         __le32 rmac_data_octets_oflow;
 298         __le32 rmac_vld_frms_oflow;
 299         __le32 rmac_vld_bcst_frms_oflow;
 300         __le32 rmac_vld_mcst_frms_oflow;
 301         __le32 rmac_accepted_ucst_frms_oflow;
 302         __le32 rmac_ttl_octets_oflow;
 303         __le32 rmac_discarded_frms_oflow;
 304         __le32 rmac_accepted_nucst_frms_oflow;
 305         __le32 rmac_usized_frms_oflow;
 306         __le32 rmac_drop_events_oflow;
 307         __le32 rmac_frag_frms_oflow;
 308         __le32 rmac_osized_frms_oflow;
 309         __le32 rmac_ip_oflow;
 310         __le32 rmac_jabber_frms_oflow;
 311         __le32 rmac_icmp_oflow;
 312         __le32 rmac_drop_ip_oflow;
 313         __le32 rmac_err_drp_udp_oflow;
 314         __le32 rmac_udp_oflow;
 315         __le32 reserved_11;
 316         __le32 rmac_pause_cnt_oflow;
 317         __le64 rmac_ttl_1519_4095_frms;
 318         __le64 rmac_ttl_4096_8191_frms;
 319         __le64 rmac_ttl_8192_max_frms;
 320         __le64 rmac_ttl_gt_max_frms;
 321         __le64 rmac_osized_alt_frms;
 322         __le64 rmac_jabber_alt_frms;
 323         __le64 rmac_gt_max_alt_frms;
 324         __le64 rmac_vlan_frms;
 325         __le32 rmac_len_discard;
 326         __le32 rmac_fcs_discard;
 327         __le32 rmac_pf_discard;
 328         __le32 rmac_da_discard;
 329         __le32 rmac_red_discard;
 330         __le32 rmac_rts_discard;
 331         __le32 reserved_12;
 332         __le32 rmac_ingm_full_discard;
 333         __le32 reserved_13;
 334         __le32 rmac_accepted_ip_oflow;
 335         __le32 reserved_14;
 336         __le32 link_fault_cnt;
 337         u8  buffer[20];
 338         struct swStat sw_stat;
 339         struct xpakStat xpak_stat;
 340 };
 341
 342 /* Default value for 'vlan_strip_tag' configuration parameter */
 343 #define NO_STRIP_IN_PROMISC 2
 344
 345 /*
 346  * Structures representing different init time configuration
 347  * parameters of the NIC.
 348  */
 349
 350 #define MAX_TX_FIFOS 8
 351 #define MAX_RX_RINGS 8
 352
 353 #define FIFO_DEFAULT_NUM        5
 354 #define FIFO_UDP_MAX_NUM                        2 /* 0 - even, 1 -odd ports */
 355 #define FIFO_OTHER_MAX_NUM                      1
 356
 357
 358 #define MAX_RX_DESC_1  (MAX_RX_RINGS * MAX_RX_BLOCKS_PER_RING * 128)
 359 #define MAX_RX_DESC_2  (MAX_RX_RINGS * MAX_RX_BLOCKS_PER_RING * 86)
 360 #define MAX_TX_DESC    (MAX_AVAILABLE_TXDS)
 361
 362 /* FIFO mappings for all possible number of fifos configured */
 363 static const int fifo_map[][MAX_TX_FIFOS] = {
 364         {0, 0, 0, 0, 0, 0, 0, 0},
 365         {0, 0, 0, 0, 1, 1, 1, 1},
 366         {0, 0, 0, 1, 1, 1, 2, 2},
 367         {0, 0, 1, 1, 2, 2, 3, 3},
 368         {0, 0, 1, 1, 2, 2, 3, 4},
 369         {0, 0, 1, 1, 2, 3, 4, 5},
 370         {0, 0, 1, 2, 3, 4, 5, 6},
 371         {0, 1, 2, 3, 4, 5, 6, 7},
 372 };
 373
 374 static const u16 fifo_selector[MAX_TX_FIFOS] = {0, 1, 3, 3, 7, 7, 7, 7};
 375
 376 /* Maintains Per FIFO related information. */
 377 struct tx_fifo_config {
 378 #define MAX_AVAILABLE_TXDS      8192
 379         u32 fifo_len;           /* specifies len of FIFO up to 8192, ie no of TxDLs */
 380 /* Priority definition */
 381 #define TX_FIFO_PRI_0               0   /*Highest */
 382 #define TX_FIFO_PRI_1               1
 383 #define TX_FIFO_PRI_2               2
 384 #define TX_FIFO_PRI_3               3
 385 #define TX_FIFO_PRI_4               4
 386 #define TX_FIFO_PRI_5               5
 387 #define TX_FIFO_PRI_6               6
 388 #define TX_FIFO_PRI_7               7   /*lowest */
 389         u8 fifo_priority;       /* specifies pointer level for FIFO */
 390         /* user should not set twos fifos with same pri */
 391         u8 f_no_snoop;
 392 #define NO_SNOOP_TXD                0x01
 393 #define NO_SNOOP_TXD_BUFFER          0x02
 394 };
 395
 396
 397 /* Maintains per Ring related information */
 398 struct rx_ring_config {
 399         u32 num_rxd;            /*No of RxDs per Rx Ring */
 400 #define RX_RING_PRI_0               0   /* highest */
 401 #define RX_RING_PRI_1               1
 402 #define RX_RING_PRI_2               2
 403 #define RX_RING_PRI_3               3
 404 #define RX_RING_PRI_4               4
 405 #define RX_RING_PRI_5               5
 406 #define RX_RING_PRI_6               6
 407 #define RX_RING_PRI_7               7   /* lowest */
 408
 409         u8 ring_priority;       /*Specifies service priority of ring */
 410         /* OSM should not set any two rings with same priority */
 411         u8 ring_org;            /*Organization of ring */
 412 #define RING_ORG_BUFF1          0x01
 413 #define RX_RING_ORG_BUFF3       0x03
 414 #define RX_RING_ORG_BUFF5       0x05
 415
 416         u8 f_no_snoop;
 417 #define NO_SNOOP_RXD                0x01
 418 #define NO_SNOOP_RXD_BUFFER         0x02
 419 };
 420
 421 /* This structure provides contains values of the tunable parameters
 422  * of the H/W
 423  */
 424 struct config_param {
 425 /* Tx Side */
 426         u32 tx_fifo_num;        /*Number of Tx FIFOs */
 427
 428         /* 0-No steering, 1-Priority steering, 2-Default fifo map */
 429 #define NO_STEERING                             0
 430 #define TX_PRIORITY_STEERING                    0x1
 431 #define TX_DEFAULT_STEERING                     0x2
 432         u8 tx_steering_type;
 433
 434         u8 fifo_mapping[MAX_TX_FIFOS];
 435         struct tx_fifo_config tx_cfg[MAX_TX_FIFOS];     /*Per-Tx FIFO config */
 436         u32 max_txds;           /*Max no. of Tx buffer descriptor per TxDL */
 437         u64 tx_intr_type;
 438 #define INTA    0
 439 #define MSI_X   2
 440         u8 intr_type;
 441         u8 napi;
 442
 443         /* Specifies if Tx Intr is UTILZ or PER_LIST type. */
 444
 445 /* Rx Side */
 446         u32 rx_ring_num;        /*Number of receive rings */
 447 #define MAX_RX_BLOCKS_PER_RING  150
 448
 449         struct rx_ring_config rx_cfg[MAX_RX_RINGS];     /*Per-Rx Ring config */
 450
 451 #define HEADER_ETHERNET_II_802_3_SIZE 14
 452 #define HEADER_802_2_SIZE              3
 453 #define HEADER_SNAP_SIZE               5
 454 #define HEADER_VLAN_SIZE               4
 455
 456 #define MIN_MTU                       46
 457 #define MAX_PYLD                    1500
 458 #define MAX_MTU                     (MAX_PYLD+18)
 459 #define MAX_MTU_VLAN                (MAX_PYLD+22)
 460 #define MAX_PYLD_JUMBO              9600
 461 #define MAX_MTU_JUMBO               (MAX_PYLD_JUMBO+18)
 462 #define MAX_MTU_JUMBO_VLAN          (MAX_PYLD_JUMBO+22)
 463         u16 bus_speed;
 464         int max_mc_addr;        /* xena=64 herc=256 */
 465         int max_mac_addr;       /* xena=16 herc=64 */
 466         int mc_start_offset;    /* xena=16 herc=64 */
 467         u8 multiq;
 468 };
 469
 470 /* Structure representing MAC Addrs */
 471 struct mac_addr {
 472         u8 mac_addr[ETH_ALEN];
 473 };
 474
 475 /* Structure that represent every FIFO element in the BAR1
 476  * Address location.
 477  */
 478 struct TxFIFO_element {
 479         u64 TxDL_Pointer;
 480
 481         u64 List_Control;
 482 #define TX_FIFO_LAST_TXD_NUM( val)     vBIT(val,0,8)
 483 #define TX_FIFO_FIRST_LIST             s2BIT(14)
 484 #define TX_FIFO_LAST_LIST              s2BIT(15)
 485 #define TX_FIFO_FIRSTNLAST_LIST        vBIT(3,14,2)
 486 #define TX_FIFO_SPECIAL_FUNC           s2BIT(23)
 487 #define TX_FIFO_DS_NO_SNOOP            s2BIT(31)
 488 #define TX_FIFO_BUFF_NO_SNOOP          s2BIT(30)
 489 };
 490
 491 /* Tx descriptor structure */
 492 struct TxD {
 493         u64 Control_1;
 494 /* bit mask */
 495 #define TXD_LIST_OWN_XENA       s2BIT(7)
 496 #define TXD_T_CODE              (s2BIT(12)|s2BIT(13)|s2BIT(14)|s2BIT(15))
 497 #define TXD_T_CODE_OK(val)      (|(val & TXD_T_CODE))
 498 #define GET_TXD_T_CODE(val)     ((val & TXD_T_CODE)<<12)
 499 #define TXD_GATHER_CODE         (s2BIT(22) | s2BIT(23))
 500 #define TXD_GATHER_CODE_FIRST   s2BIT(22)
 501 #define TXD_GATHER_CODE_LAST    s2BIT(23)
 502 #define TXD_TCP_LSO_EN          s2BIT(30)
 503 #define TXD_UDP_COF_EN          s2BIT(31)
 504 #define TXD_UFO_EN              s2BIT(31) | s2BIT(30)
 505 #define TXD_TCP_LSO_MSS(val)    vBIT(val,34,14)
 506 #define TXD_UFO_MSS(val)        vBIT(val,34,14)
 507 #define TXD_BUFFER0_SIZE(val)   vBIT(val,48,16)
 508
 509         u64 Control_2;
 510 #define TXD_TX_CKO_CONTROL      (s2BIT(5)|s2BIT(6)|s2BIT(7))
 511 #define TXD_TX_CKO_IPV4_EN      s2BIT(5)
 512 #define TXD_TX_CKO_TCP_EN       s2BIT(6)
 513 #define TXD_TX_CKO_UDP_EN       s2BIT(7)
 514 #define TXD_VLAN_ENABLE         s2BIT(15)
 515 #define TXD_VLAN_TAG(val)       vBIT(val,16,16)
 516 #define TXD_INT_NUMBER(val)     vBIT(val,34,6)
 517 #define TXD_INT_TYPE_PER_LIST   s2BIT(47)
 518 #define TXD_INT_TYPE_UTILZ      s2BIT(46)
 519 #define TXD_SET_MARKER         vBIT(0x6,0,4)
 520
 521         u64 Buffer_Pointer;
 522         u64 Host_Control;       /* reserved for host */
 523 };
 524
 525 /* Structure to hold the phy and virt addr of every TxDL. */
 526 struct list_info_hold {
 527         dma_addr_t list_phy_addr;
 528         void *list_virt_addr;
 529 };
 530
 531 /* Rx descriptor structure for 1 buffer mode */
 532 struct RxD_t {
 533         u64 Host_Control;       /* reserved for host */
 534         u64 Control_1;
 535 #define RXD_OWN_XENA            s2BIT(7)
 536 #define RXD_T_CODE              (s2BIT(12)|s2BIT(13)|s2BIT(14)|s2BIT(15))
 537 #define RXD_FRAME_PROTO         vBIT(0xFFFF,24,8)
 538 #define RXD_FRAME_VLAN_TAG      s2BIT(24)
 539 #define RXD_FRAME_PROTO_IPV4    s2BIT(27)
 540 #define RXD_FRAME_PROTO_IPV6    s2BIT(28)
 541 #define RXD_FRAME_IP_FRAG       s2BIT(29)
 542 #define RXD_FRAME_PROTO_TCP     s2BIT(30)
 543 #define RXD_FRAME_PROTO_UDP     s2BIT(31)
 544 #define TCP_OR_UDP_FRAME        (RXD_FRAME_PROTO_TCP | RXD_FRAME_PROTO_UDP)
 545 #define RXD_GET_L3_CKSUM(val)   ((u16)(val>> 16) & 0xFFFF)
 546 #define RXD_GET_L4_CKSUM(val)   ((u16)(val) & 0xFFFF)
 547
 548         u64 Control_2;
 549 #define THE_RXD_MARK            0x3
 550 #define SET_RXD_MARKER          vBIT(THE_RXD_MARK, 0, 2)
 551 #define GET_RXD_MARKER(ctrl)    ((ctrl & SET_RXD_MARKER) >> 62)
 552
 553 #define MASK_VLAN_TAG           vBIT(0xFFFF,48,16)
 554 #define SET_VLAN_TAG(val)       vBIT(val,48,16)
 555 #define SET_NUM_TAG(val)       vBIT(val,16,32)
 556
 557
 558 };
 559 /* Rx descriptor structure for 1 buffer mode */
 560 struct RxD1 {
 561         struct RxD_t h;
 562
 563 #define MASK_BUFFER0_SIZE_1       vBIT(0x3FFF,2,14)
 564 #define SET_BUFFER0_SIZE_1(val)   vBIT(val,2,14)
 565 #define RXD_GET_BUFFER0_SIZE_1(_Control_2) \
 566         (u16)((_Control_2 & MASK_BUFFER0_SIZE_1) >> 48)
 567         u64 Buffer0_ptr;
 568 };
 569 /* Rx descriptor structure for 3 or 2 buffer mode */
 570
 571 struct RxD3 {
 572         struct RxD_t h;
 573
 574 #define MASK_BUFFER0_SIZE_3       vBIT(0xFF,2,14)
 575 #define MASK_BUFFER1_SIZE_3       vBIT(0xFFFF,16,16)
 576 #define MASK_BUFFER2_SIZE_3       vBIT(0xFFFF,32,16)
 577 #define SET_BUFFER0_SIZE_3(val)   vBIT(val,8,8)
 578 #define SET_BUFFER1_SIZE_3(val)   vBIT(val,16,16)
 579 #define SET_BUFFER2_SIZE_3(val)   vBIT(val,32,16)
 580 #define RXD_GET_BUFFER0_SIZE_3(Control_2) \
 581         (u8)((Control_2 & MASK_BUFFER0_SIZE_3) >> 48)
 582 #define RXD_GET_BUFFER1_SIZE_3(Control_2) \
 583         (u16)((Control_2 & MASK_BUFFER1_SIZE_3) >> 32)
 584 #define RXD_GET_BUFFER2_SIZE_3(Control_2) \
 585         (u16)((Control_2 & MASK_BUFFER2_SIZE_3) >> 16)
 586 #define BUF0_LEN        40
 587 #define BUF1_LEN        1
 588
 589         u64 Buffer0_ptr;
 590         u64 Buffer1_ptr;
 591         u64 Buffer2_ptr;
 592 };
 593
 594
 595 /* Structure that represents the Rx descriptor block which contains
 596  * 128 Rx descriptors.
 597  */
 598 struct RxD_block {
 599 #define MAX_RXDS_PER_BLOCK_1            127
 600         struct RxD1 rxd[MAX_RXDS_PER_BLOCK_1];
 601
 602         u64 reserved_0;
 603 #define END_OF_BLOCK    0xFEFFFFFFFFFFFFFFULL
 604         u64 reserved_1;         /* 0xFEFFFFFFFFFFFFFF to mark last
 605                                  * Rxd in this blk */
 606         u64 reserved_2_pNext_RxD_block; /* Logical ptr to next */
 607         u64 pNext_RxD_Blk_physical;     /* Buff0_ptr.In a 32 bit arch
 608                                          * the upper 32 bits should
 609                                          * be 0 */
 610 };
 611
 612 #define SIZE_OF_BLOCK   4096
 613
 614 #define RXD_MODE_1      0 /* One Buffer mode */
 615 #define RXD_MODE_3B     1 /* Two Buffer mode */
 616
 617 /* Structure to hold virtual addresses of Buf0 and Buf1 in
 618  * 2buf mode. */
 619 struct buffAdd {
 620         void *ba_0_org;
 621         void *ba_1_org;
 622         void *ba_0;
 623         void *ba_1;
 624 };
 625
 626 /* Structure which stores all the MAC control parameters */
 627
 628 /* This structure stores the offset of the RxD in the ring
 629  * from which the Rx Interrupt processor can start picking
 630  * up the RxDs for processing.
 631  */
 632 struct rx_curr_get_info {
 633         u32 block_index;
 634         u32 offset;
 635         u32 ring_len;
 636 };
 637
 638 struct rx_curr_put_info {
 639         u32 block_index;
 640         u32 offset;
 641         u32 ring_len;
 642 };
 643
 644 /* This structure stores the offset of the TxDl in the FIFO
 645  * from which the Tx Interrupt processor can start picking
 646  * up the TxDLs for send complete interrupt processing.
 647  */
 648 struct tx_curr_get_info {
 649         u32 offset;
 650         u32 fifo_len;
 651 };
 652
 653 struct tx_curr_put_info {
 654         u32 offset;
 655         u32 fifo_len;
 656 };
 657
 658 struct rxd_info {
 659         void *virt_addr;
 660         dma_addr_t dma_addr;
 661 };
 662
 663 /* Structure that holds the Phy and virt addresses of the Blocks */
 664 struct rx_block_info {
 665         void *block_virt_addr;
 666         dma_addr_t block_dma_addr;
 667         struct rxd_info *rxds;
 668 };
 669
 670 /* Data structure to represent a LRO session */
 671 struct lro {
 672         struct sk_buff  *parent;
 673         struct sk_buff  *last_frag;
 674         u8              *l2h;
 675         struct iphdr    *iph;
 676         struct tcphdr   *tcph;
 677         u32             tcp_next_seq;
 678         __be32          tcp_ack;
 679         int             total_len;
 680         int             frags_len;
 681         int             sg_num;
 682         int             in_use;
 683         __be16          window;
 684         u16             vlan_tag;
 685         u32             cur_tsval;
 686         __be32          cur_tsecr;
 687         u8              saw_ts;
 688 } ____cacheline_aligned;
 689
 690 /* Ring specific structure */
 691 struct ring_info {
 692         /* The ring number */
 693         int ring_no;
 694
 695         /* per-ring buffer counter */
 696         u32 rx_bufs_left;
 697
 698 #define MAX_LRO_SESSIONS       32
 699         struct lro lro0_n[MAX_LRO_SESSIONS];
 700         u8              lro;
 701
 702         /* copy of sp->rxd_mode flag */
 703         int rxd_mode;
 704
 705         /* Number of rxds per block for the rxd_mode */
 706         int rxd_count;
 707
 708         /* copy of sp pointer */
 709         struct s2io_nic *nic;
 710
 711         /* copy of sp->dev pointer */
 712         struct net_device *dev;
 713
 714         /* copy of sp->pdev pointer */
 715         struct pci_dev *pdev;
 716
 717         /* Per ring napi struct */
 718         struct napi_struct napi;
 719
 720         unsigned long interrupt_count;
 721
 722         /*
 723          *  Place holders for the virtual and physical addresses of
 724          *  all the Rx Blocks
 725          */
 726         struct rx_block_info rx_blocks[MAX_RX_BLOCKS_PER_RING];
 727         int block_count;
 728         int pkt_cnt;
 729
 730         /*
 731          * Put pointer info which indictes which RxD has to be replenished
 732          * with a new buffer.
 733          */
 734         struct rx_curr_put_info rx_curr_put_info;
 735
 736         /*
 737          * Get pointer info which indictes which is the last RxD that was
 738          * processed by the driver.
 739          */
 740         struct rx_curr_get_info rx_curr_get_info;
 741
 742         /* interface MTU value */
 743         unsigned mtu;
 744
 745         /* Buffer Address store. */
 746         struct buffAdd **ba;
 747 } ____cacheline_aligned;
 748
 749 /* Fifo specific structure */
 750 struct fifo_info {
 751         /* FIFO number */
 752         int fifo_no;
 753
 754         /* Maximum TxDs per TxDL */
 755         int max_txds;
 756
 757         /* Place holder of all the TX List's Phy and Virt addresses. */
 758         struct list_info_hold *list_info;
 759
 760         /*
 761          * Current offset within the tx FIFO where driver would write
 762          * new Tx frame
 763          */
 764         struct tx_curr_put_info tx_curr_put_info;
 765
 766         /*
 767          * Current offset within tx FIFO from where the driver would start freeing
 768          * the buffers
 769          */
 770         struct tx_curr_get_info tx_curr_get_info;
 771 #define FIFO_QUEUE_START 0
 772 #define FIFO_QUEUE_STOP 1
 773         int queue_state;
 774
 775         /* copy of sp->dev pointer */
 776         struct net_device *dev;
 777
 778         /* copy of multiq status */
 779         u8 multiq;
 780
 781         /* Per fifo lock */
 782         spinlock_t tx_lock;
 783
 784         /* Per fifo UFO in band structure */
 785         u64 *ufo_in_band_v;
 786
 787         struct s2io_nic *nic;
 788 } ____cacheline_aligned;
 789
 790 /* Information related to the Tx and Rx FIFOs and Rings of Xena
 791  * is maintained in this structure.
 792  */
 793 struct mac_info {
 794 /* tx side stuff */
 795         /* logical pointer of start of each Tx FIFO */
 796         struct TxFIFO_element __iomem *tx_FIFO_start[MAX_TX_FIFOS];
 797
 798         /* Fifo specific structure */
 799         struct fifo_info fifos[MAX_TX_FIFOS];
 800
 801         /* Save virtual address of TxD page with zero DMA addr(if any) */
 802         void *zerodma_virt_addr;
 803
 804 /* rx side stuff */
 805         /* Ring specific structure */
 806         struct ring_info rings[MAX_RX_RINGS];
 807
 808         u16 rmac_pause_time;
 809         u16 mc_pause_threshold_q0q3;
 810         u16 mc_pause_threshold_q4q7;
 811
 812         void *stats_mem;        /* orignal pointer to allocated mem */
 813         dma_addr_t stats_mem_phy;       /* Physical address of the stat block */
 814         u32 stats_mem_sz;
 815         struct stat_block *stats_info;  /* Logical address of the stat block */
 816 };
 817
 818 /* Default Tunable parameters of the NIC. */
 819 #define DEFAULT_FIFO_0_LEN 4096
 820 #define DEFAULT_FIFO_1_7_LEN 512
 821 #define SMALL_BLK_CNT   30
 822 #define LARGE_BLK_CNT   100
 823
 824 /*
 825  * Structure to keep track of the MSI-X vectors and the corresponding
 826  * argument registered against each vector
 827  */
 828 #define MAX_REQUESTED_MSI_X     9
 829 struct s2io_msix_entry
 830 {
 831         u16 vector;
 832         u16 entry;
 833         void *arg;
 834
 835         u8 type;
 836 #define        MSIX_ALARM_TYPE         1
 837 #define        MSIX_RING_TYPE          2
 838
 839         u8 in_use;
 840 #define MSIX_REGISTERED_SUCCESS 0xAA
 841 };
 842
 843 struct msix_info_st {
 844         u64 addr;
 845         u64 data;
 846 };
 847
 848 /* These flags represent the devices temporary state */
 849 enum s2io_device_state_t
 850 {
 851         __S2IO_STATE_LINK_TASK=0,
 852         __S2IO_STATE_CARD_UP
 853 };
 854
 855 /* Structure representing one instance of the NIC */
 856 struct s2io_nic {
 857         int rxd_mode;
 858         /*
 859          * Count of packets to be processed in a given iteration, it will be indicated
 860          * by the quota field of the device structure when NAPI is enabled.
 861          */
 862         int pkts_to_process;
 863         struct net_device *dev;
 864         struct mac_info mac_control;
 865         struct config_param config;
 866         struct pci_dev *pdev;
 867         void __iomem *bar0;
 868         void __iomem *bar1;
 869 #define MAX_MAC_SUPPORTED   16
 870 #define MAX_SUPPORTED_MULTICASTS MAX_MAC_SUPPORTED
 871
 872         struct mac_addr def_mac_addr[256];
 873
 874         struct net_device_stats stats;
 875         int high_dma_flag;
 876         int device_enabled_once;
 877
 878         char name[60];
 879
 880         /* Timer that handles I/O errors/exceptions */
 881         struct timer_list alarm_timer;
 882
 883         /* Space to back up the PCI config space */
 884         u32 config_space[256 / sizeof(u32)];
 885
 886 #define PROMISC     1
 887 #define ALL_MULTI   2
 888
 889 #define MAX_ADDRS_SUPPORTED 64
 890         u16 mc_addr_count;
 891
 892         u16 m_cast_flg;
 893         u16 all_multi_pos;
 894         u16 promisc_flg;
 895
 896         /*  Restart timer, used to restart NIC if the device is stuck and
 897          *  a schedule task that will set the correct Link state once the
 898          *  NIC's PHY has stabilized after a state change.
 899          */
 900         struct work_struct rst_timer_task;
 901         struct work_struct set_link_task;
 902
 903         /* Flag that can be used to turn on or turn off the Rx checksum
 904          * offload feature.
 905          */
 906         int rx_csum;
 907
 908         /* Below variables are used for fifo selection to transmit a packet */
 909         u16 fifo_selector[MAX_TX_FIFOS];
 910
 911         /* Total fifos for tcp packets */
 912         u8 total_tcp_fifos;
 913
 914         /*
 915         * Beginning index of udp for udp packets
 916         * Value will be equal to
 917         * (tx_fifo_num - FIFO_UDP_MAX_NUM - FIFO_OTHER_MAX_NUM)
 918         */
 919         u8 udp_fifo_idx;
 920
 921         u8 total_udp_fifos;
 922
 923         /*
 924          * Beginning index of fifo for all other packets
 925          * Value will be equal to (tx_fifo_num - FIFO_OTHER_MAX_NUM)
 926         */
 927         u8 other_fifo_idx;
 928
 929         struct napi_struct napi;
 930         /*  after blink, the adapter must be restored with original
 931          *  values.
 932          */
 933         u64 adapt_ctrl_org;
 934
 935         /* Last known link state. */
 936         u16 last_link_state;
 937 #define LINK_DOWN       1
 938 #define LINK_UP         2
 939
 940         int task_flag;
 941         unsigned long long start_time;
 942         struct vlan_group *vlgrp;
 943         int vlan_strip_flag;
 944 #define MSIX_FLG                0xA5
 945         int num_entries;
 946         struct msix_entry *entries;
 947         int msi_detected;
 948         wait_queue_head_t msi_wait;
 949         struct s2io_msix_entry *s2io_entries;
 950         char desc[MAX_REQUESTED_MSI_X][25];
 951
 952         int avail_msix_vectors; /* No. of MSI-X vectors granted by system */
 953
 954         struct msix_info_st msix_info[0x3f];
 955
 956 #define XFRAME_I_DEVICE         1
 957 #define XFRAME_II_DEVICE        2
 958         u8 device_type;
 959
 960         unsigned long   clubbed_frms_cnt;
 961         unsigned long   sending_both;
 962         u16             lro_max_aggr_per_sess;
 963         volatile unsigned long state;
 964         u64             general_int_mask;
 965
 966 #define VPD_STRING_LEN 80
 967         u8  product_name[VPD_STRING_LEN];
 968         u8  serial_num[VPD_STRING_LEN];
 969 };
 970
 971 #define RESET_ERROR 1;
 972 #define CMD_ERROR   2;
 973
 974 /*  OS related system calls */
 975 #ifndef readq
 976 static inline u64 readq(void __iomem *addr)
 977 {
 978         u64 ret = 0;
 979         ret = readl(addr + 4);
 980         ret <<= 32;
 981         ret |= readl(addr);
 982
 983         return ret;
 984 }
 985 #endif
 986
 987 #ifndef writeq
 988 static inline void writeq(u64 val, void __iomem *addr)
 989 {
 990         writel((u32) (val), addr);
 991         writel((u32) (val >> 32), (addr + 4));
 992 }
 993 #endif
 994
 995 /*
 996  * Some registers have to be written in a particular order to
 997  * expect correct hardware operation. The macro SPECIAL_REG_WRITE
 998  * is used to perform such ordered writes. Defines UF (Upper First)
 999  * and LF (Lower First) will be used to specify the required write order.
1000  */
1001 #define UF      1
1002 #define LF      2
1003 static inline void SPECIAL_REG_WRITE(u64 val, void __iomem *addr, int order)
1004 {
1005         if (order == LF) {
1006                 writel((u32) (val), addr);
1007                 (void) readl(addr);
1008                 writel((u32) (val >> 32), (addr + 4));
1009                 (void) readl(addr + 4);
1010         } else {
1011                 writel((u32) (val >> 32), (addr + 4));
1012                 (void) readl(addr + 4);
1013                 writel((u32) (val), addr);
1014                 (void) readl(addr);
1015         }
1016 }
1017
1018 /*  Interrupt related values of Xena */
1019
1020 #define ENABLE_INTRS    1
1021 #define DISABLE_INTRS   2
1022
1023 /*  Highest level interrupt blocks */
1024 #define TX_PIC_INTR     (0x0001<<0)
1025 #define TX_DMA_INTR     (0x0001<<1)
1026 #define TX_MAC_INTR     (0x0001<<2)
1027 #define TX_XGXS_INTR    (0x0001<<3)
1028 #define TX_TRAFFIC_INTR (0x0001<<4)
1029 #define RX_PIC_INTR     (0x0001<<5)
1030 #define RX_DMA_INTR     (0x0001<<6)
1031 #define RX_MAC_INTR     (0x0001<<7)
1032 #define RX_XGXS_INTR    (0x0001<<8)
1033 #define RX_TRAFFIC_INTR (0x0001<<9)
1034 #define MC_INTR         (0x0001<<10)
1035 #define ENA_ALL_INTRS    (   TX_PIC_INTR     | \
1036                             TX_DMA_INTR     | \
1037                             TX_MAC_INTR     | \
1038                             TX_XGXS_INTR    | \
1039                             TX_TRAFFIC_INTR | \
1040                             RX_PIC_INTR     | \
1041                             RX_DMA_INTR     | \
1042                             RX_MAC_INTR     | \
1043                             RX_XGXS_INTR    | \
1044                             RX_TRAFFIC_INTR | \
1045                             MC_INTR )
1046
1047 /*  Interrupt masks for the general interrupt mask register */
1048 #define DISABLE_ALL_INTRS   0xFFFFFFFFFFFFFFFFULL
1049
1050 #define TXPIC_INT_M         s2BIT(0)
1051 #define TXDMA_INT_M         s2BIT(1)
1052 #define TXMAC_INT_M         s2BIT(2)
1053 #define TXXGXS_INT_M        s2BIT(3)
1054 #define TXTRAFFIC_INT_M     s2BIT(8)
1055 #define PIC_RX_INT_M        s2BIT(32)
1056 #define RXDMA_INT_M         s2BIT(33)
1057 #define RXMAC_INT_M         s2BIT(34)
1058 #define MC_INT_M            s2BIT(35)
1059 #define RXXGXS_INT_M        s2BIT(36)
1060 #define RXTRAFFIC_INT_M     s2BIT(40)
1061
1062 /*  PIC level Interrupts TODO*/
1063
1064 /*  DMA level Inressupts */
1065 #define TXDMA_PFC_INT_M     s2BIT(0)
1066 #define TXDMA_PCC_INT_M     s2BIT(2)
1067
1068 /*  PFC block interrupts */
1069 #define PFC_MISC_ERR_1      s2BIT(0)    /* Interrupt to indicate FIFO full */
1070
1071 /* PCC block interrupts. */
1072 #define PCC_FB_ECC_ERR     vBIT(0xff, 16, 8)    /* Interrupt to indicate
1073                                                    PCC_FB_ECC Error. */
1074
1075 #define RXD_GET_VLAN_TAG(Control_2) (u16)(Control_2 & MASK_VLAN_TAG)
1076 /*
1077  * Prototype declaration.
1078  */
1079 static int __devinit s2io_init_nic(struct pci_dev *pdev,
1080                                    const struct pci_device_id *pre);
1081 static void __devexit s2io_rem_nic(struct pci_dev *pdev);
1082 static int init_shared_mem(struct s2io_nic *sp);
1083 static void free_shared_mem(struct s2io_nic *sp);
1084 static int init_nic(struct s2io_nic *nic);
1085 static int rx_intr_handler(struct ring_info *ring_data, int budget);
1086 static void s2io_txpic_intr_handle(struct s2io_nic *sp);
1087 static void tx_intr_handler(struct fifo_info *fifo_data);
1088 static void s2io_handle_errors(void * dev_id);
1089
1090 static int s2io_starter(void);
1091 static void s2io_closer(void);
1092 static void s2io_tx_watchdog(struct net_device *dev);
1093 static void s2io_set_multicast(struct net_device *dev);
1094 static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp);
1095 static void s2io_link(struct s2io_nic * sp, int link);
1096 static void s2io_reset(struct s2io_nic * sp);
1097 static int s2io_poll_msix(struct napi_struct *napi, int budget);
1098 static int s2io_poll_inta(struct napi_struct *napi, int budget);
1099 static void s2io_init_pci(struct s2io_nic * sp);
1100 static int do_s2io_prog_unicast(struct net_device *dev, u8 *addr);
1101 static void s2io_alarm_handle(unsigned long data);
1102 static irqreturn_t
1103 s2io_msix_ring_handle(int irq, void *dev_id);
1104 static irqreturn_t
1105 s2io_msix_fifo_handle(int irq, void *dev_id);
1106 static irqreturn_t s2io_isr(int irq, void *dev_id);
1107 static int verify_xena_quiescence(struct s2io_nic *sp);
1108 static const struct ethtool_ops netdev_ethtool_ops;
1109 static void s2io_set_link(struct work_struct *work);
1110 static int s2io_set_swapper(struct s2io_nic * sp);
1111 static void s2io_card_down(struct s2io_nic *nic);
1112 static int s2io_card_up(struct s2io_nic *nic);
1113 static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit,
1114                                         int bit_state);
1115 static int s2io_add_isr(struct s2io_nic * sp);
1116 static void s2io_rem_isr(struct s2io_nic * sp);
1117
1118 static void restore_xmsi_data(struct s2io_nic *nic);
1119 static void do_s2io_store_unicast_mc(struct s2io_nic *sp);
1120 static void do_s2io_restore_unicast_mc(struct s2io_nic *sp);
1121 static u64 do_s2io_read_unicast_mc(struct s2io_nic *sp, int offset);
1122 static int do_s2io_add_mc(struct s2io_nic *sp, u8 *addr);
1123 static int do_s2io_add_mac(struct s2io_nic *sp, u64 addr, int offset);
1124 static int do_s2io_delete_unicast_mc(struct s2io_nic *sp, u64 addr);
1125
1126 static int s2io_club_tcp_session(struct ring_info *ring_data, u8 *buffer,
1127         u8 **tcp, u32 *tcp_len, struct lro **lro, struct RxD_t *rxdp,
1128         struct s2io_nic *sp);
1129 static void clear_lro_session(struct lro *lro);
1130 static void queue_rx_frame(struct sk_buff *skb, u16 vlan_tag);
1131 static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro);
1132 static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
1133                            struct sk_buff *skb, u32 tcp_len);
1134 static int rts_ds_steer(struct s2io_nic *nic, u8 ds_codepoint, u8 ring);
1135
1136 static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
1137                                               pci_channel_state_t state);
1138 static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev);
1139 static void s2io_io_resume(struct pci_dev *pdev);
1140
1141 #define s2io_tcp_mss(skb) skb_shinfo(skb)->gso_size
1142 #define s2io_udp_mss(skb) skb_shinfo(skb)->gso_size
1143 #define s2io_offload_type(skb) skb_shinfo(skb)->gso_type
1144
1145 #define S2IO_PARM_INT(X, def_val) \
1146         static unsigned int X = def_val;\
1147                 module_param(X , uint, 0);
1148
1149 #endif                          /* _S2IO_H */