drivers/net/s2io.c

   1 /************************************************************************
   2  * s2io.c: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
   3  * Copyright(c) 2002-2005 Neterion Inc.
   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  * Credits:
  14  * Jeff Garzik          : For pointing out the improper error condition
  15  *                        check in the s2io_xmit routine and also some
  16  *                        issues in the Tx watch dog function. Also for
  17  *                        patiently answering all those innumerable
  18  *                        questions regaring the 2.6 porting issues.
  19  * Stephen Hemminger    : Providing proper 2.6 porting mechanism for some
  20  *                        macros available only in 2.6 Kernel.
  21  * Francois Romieu      : For pointing out all code part that were
  22  *                        deprecated and also styling related comments.
  23  * Grant Grundler       : For helping me get rid of some Architecture
  24  *                        dependent code.
  25  * Christopher Hellwig  : Some more 2.6 specific issues in the driver.
  26  *
  27  * The module loadable parameters that are supported by the driver and a brief
  28  * explaination of all the variables.
  29  *
  30  * rx_ring_num : This can be used to program the number of receive rings used
  31  * in the driver.
  32  * rx_ring_sz: This defines the number of receive blocks each ring can have.
  33  *     This is also an array of size 8.
  34  * rx_ring_mode: This defines the operation mode of all 8 rings. The valid
  35  *              values are 1, 2 and 3.
  36  * tx_fifo_num: This defines the number of Tx FIFOs thats used int the driver.
  37  * tx_fifo_len: This too is an array of 8. Each element defines the number of
  38  * Tx descriptors that can be associated with each corresponding FIFO.
  39  * intr_type: This defines the type of interrupt. The values can be 0(INTA),
  40  *     1(MSI), 2(MSI_X). Default value is '0(INTA)'
  41  * lro: Specifies whether to enable Large Receive Offload (LRO) or not.
  42  *     Possible values '1' for enable '0' for disable. Default is '0'
  43  * lro_max_pkts: This parameter defines maximum number of packets can be
  44  *     aggregated as a single large packet
  45  ************************************************************************/
  46
  47 #include <linux/module.h>
  48 #include <linux/types.h>
  49 #include <linux/errno.h>
  50 #include <linux/ioport.h>
  51 #include <linux/pci.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/kernel.h>
  54 #include <linux/netdevice.h>
  55 #include <linux/etherdevice.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/init.h>
  58 #include <linux/delay.h>
  59 #include <linux/stddef.h>
  60 #include <linux/ioctl.h>
  61 #include <linux/timex.h>
  62 #include <linux/sched.h>
  63 #include <linux/ethtool.h>
  64 #include <linux/workqueue.h>
  65 #include <linux/if_vlan.h>
  66 #include <linux/ip.h>
  67 #include <linux/tcp.h>
  68 #include <net/tcp.h>
  69
  70 #include <asm/system.h>
  71 #include <asm/uaccess.h>
  72 #include <asm/io.h>
  73 #include <asm/div64.h>
  74 #include <asm/irq.h>
  75
  76 /* local include */
  77 #include "s2io.h"
  78 #include "s2io-regs.h"
  79
  80 #define DRV_VERSION "2.0.15.2"
  81
  82 /* S2io Driver name & version. */
  83 static char s2io_driver_name[] = "Neterion";
  84 static char s2io_driver_version[] = DRV_VERSION;
  85
  86 static int rxd_size[4] = {32,48,48,64};
  87 static int rxd_count[4] = {127,85,85,63};
  88
  89 static inline int RXD_IS_UP2DT(RxD_t *rxdp)
  90 {
  91         int ret;
  92
  93         ret = ((!(rxdp->Control_1 & RXD_OWN_XENA)) &&
  94                 (GET_RXD_MARKER(rxdp->Control_2) != THE_RXD_MARK));
  95
  96         return ret;
  97 }
  98
  99 /*
 100  * Cards with following subsystem_id have a link state indication
 101  * problem, 600B, 600C, 600D, 640B, 640C and 640D.
 102  * macro below identifies these cards given the subsystem_id.
 103  */
 104 #define CARDS_WITH_FAULTY_LINK_INDICATORS(dev_type, subid) \
 105         (dev_type == XFRAME_I_DEVICE) ?                 \
 106                 ((((subid >= 0x600B) && (subid <= 0x600D)) || \
 107                  ((subid >= 0x640B) && (subid <= 0x640D))) ? 1 : 0) : 0
 108
 109 #define LINK_IS_UP(val64) (!(val64 & (ADAPTER_STATUS_RMAC_REMOTE_FAULT | \
 110                                       ADAPTER_STATUS_RMAC_LOCAL_FAULT)))
 111 #define TASKLET_IN_USE test_and_set_bit(0, (&sp->tasklet_status))
 112 #define PANIC   1
 113 #define LOW     2
 114 static inline int rx_buffer_level(nic_t * sp, int rxb_size, int ring)
 115 {
 116         mac_info_t *mac_control;
 117
 118         mac_control = &sp->mac_control;
 119         if (rxb_size <= rxd_count[sp->rxd_mode])
 120                 return PANIC;
 121         else if ((mac_control->rings[ring].pkt_cnt - rxb_size) > 16)
 122                 return  LOW;
 123         return 0;
 124 }
 125
 126 /* Ethtool related variables and Macros. */
 127 static char s2io_gstrings[][ETH_GSTRING_LEN] = {
 128         "Register test\t(offline)",
 129         "Eeprom test\t(offline)",
 130         "Link test\t(online)",
 131         "RLDRAM test\t(offline)",
 132         "BIST Test\t(offline)"
 133 };
 134
 135 static char ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 136         {"tmac_frms"},
 137         {"tmac_data_octets"},
 138         {"tmac_drop_frms"},
 139         {"tmac_mcst_frms"},
 140         {"tmac_bcst_frms"},
 141         {"tmac_pause_ctrl_frms"},
 142         {"tmac_ttl_octets"},
 143         {"tmac_ucst_frms"},
 144         {"tmac_nucst_frms"},
 145         {"tmac_any_err_frms"},
 146         {"tmac_ttl_less_fb_octets"},
 147         {"tmac_vld_ip_octets"},
 148         {"tmac_vld_ip"},
 149         {"tmac_drop_ip"},
 150         {"tmac_icmp"},
 151         {"tmac_rst_tcp"},
 152         {"tmac_tcp"},
 153         {"tmac_udp"},
 154         {"rmac_vld_frms"},
 155         {"rmac_data_octets"},
 156         {"rmac_fcs_err_frms"},
 157         {"rmac_drop_frms"},
 158         {"rmac_vld_mcst_frms"},
 159         {"rmac_vld_bcst_frms"},
 160         {"rmac_in_rng_len_err_frms"},
 161         {"rmac_out_rng_len_err_frms"},
 162         {"rmac_long_frms"},
 163         {"rmac_pause_ctrl_frms"},
 164         {"rmac_unsup_ctrl_frms"},
 165         {"rmac_ttl_octets"},
 166         {"rmac_accepted_ucst_frms"},
 167         {"rmac_accepted_nucst_frms"},
 168         {"rmac_discarded_frms"},
 169         {"rmac_drop_events"},
 170         {"rmac_ttl_less_fb_octets"},
 171         {"rmac_ttl_frms"},
 172         {"rmac_usized_frms"},
 173         {"rmac_osized_frms"},
 174         {"rmac_frag_frms"},
 175         {"rmac_jabber_frms"},
 176         {"rmac_ttl_64_frms"},
 177         {"rmac_ttl_65_127_frms"},
 178         {"rmac_ttl_128_255_frms"},
 179         {"rmac_ttl_256_511_frms"},
 180         {"rmac_ttl_512_1023_frms"},
 181         {"rmac_ttl_1024_1518_frms"},
 182         {"rmac_ip"},
 183         {"rmac_ip_octets"},
 184         {"rmac_hdr_err_ip"},
 185         {"rmac_drop_ip"},
 186         {"rmac_icmp"},
 187         {"rmac_tcp"},
 188         {"rmac_udp"},
 189         {"rmac_err_drp_udp"},
 190         {"rmac_xgmii_err_sym"},
 191         {"rmac_frms_q0"},
 192         {"rmac_frms_q1"},
 193         {"rmac_frms_q2"},
 194         {"rmac_frms_q3"},
 195         {"rmac_frms_q4"},
 196         {"rmac_frms_q5"},
 197         {"rmac_frms_q6"},
 198         {"rmac_frms_q7"},
 199         {"rmac_full_q0"},
 200         {"rmac_full_q1"},
 201         {"rmac_full_q2"},
 202         {"rmac_full_q3"},
 203         {"rmac_full_q4"},
 204         {"rmac_full_q5"},
 205         {"rmac_full_q6"},
 206         {"rmac_full_q7"},
 207         {"rmac_pause_cnt"},
 208         {"rmac_xgmii_data_err_cnt"},
 209         {"rmac_xgmii_ctrl_err_cnt"},
 210         {"rmac_accepted_ip"},
 211         {"rmac_err_tcp"},
 212         {"rd_req_cnt"},
 213         {"new_rd_req_cnt"},
 214         {"new_rd_req_rtry_cnt"},
 215         {"rd_rtry_cnt"},
 216         {"wr_rtry_rd_ack_cnt"},
 217         {"wr_req_cnt"},
 218         {"new_wr_req_cnt"},
 219         {"new_wr_req_rtry_cnt"},
 220         {"wr_rtry_cnt"},
 221         {"wr_disc_cnt"},
 222         {"rd_rtry_wr_ack_cnt"},
 223         {"txp_wr_cnt"},
 224         {"txd_rd_cnt"},
 225         {"txd_wr_cnt"},
 226         {"rxd_rd_cnt"},
 227         {"rxd_wr_cnt"},
 228         {"txf_rd_cnt"},
 229         {"rxf_wr_cnt"},
 230         {"rmac_ttl_1519_4095_frms"},
 231         {"rmac_ttl_4096_8191_frms"},
 232         {"rmac_ttl_8192_max_frms"},
 233         {"rmac_ttl_gt_max_frms"},
 234         {"rmac_osized_alt_frms"},
 235         {"rmac_jabber_alt_frms"},
 236         {"rmac_gt_max_alt_frms"},
 237         {"rmac_vlan_frms"},
 238         {"rmac_len_discard"},
 239         {"rmac_fcs_discard"},
 240         {"rmac_pf_discard"},
 241         {"rmac_da_discard"},
 242         {"rmac_red_discard"},
 243         {"rmac_rts_discard"},
 244         {"rmac_ingm_full_discard"},
 245         {"link_fault_cnt"},
 246         {"\n DRIVER STATISTICS"},
 247         {"single_bit_ecc_errs"},
 248         {"double_bit_ecc_errs"},
 249         {"parity_err_cnt"},
 250         {"serious_err_cnt"},
 251         {"soft_reset_cnt"},
 252         {"fifo_full_cnt"},
 253         {"ring_full_cnt"},
 254         ("alarm_transceiver_temp_high"),
 255         ("alarm_transceiver_temp_low"),
 256         ("alarm_laser_bias_current_high"),
 257         ("alarm_laser_bias_current_low"),
 258         ("alarm_laser_output_power_high"),
 259         ("alarm_laser_output_power_low"),
 260         ("warn_transceiver_temp_high"),
 261         ("warn_transceiver_temp_low"),
 262         ("warn_laser_bias_current_high"),
 263         ("warn_laser_bias_current_low"),
 264         ("warn_laser_output_power_high"),
 265         ("warn_laser_output_power_low"),
 266         ("lro_aggregated_pkts"),
 267         ("lro_flush_both_count"),
 268         ("lro_out_of_sequence_pkts"),
 269         ("lro_flush_due_to_max_pkts"),
 270         ("lro_avg_aggr_pkts"),
 271 };
 272
 273 #define S2IO_STAT_LEN sizeof(ethtool_stats_keys)/ ETH_GSTRING_LEN
 274 #define S2IO_STAT_STRINGS_LEN S2IO_STAT_LEN * ETH_GSTRING_LEN
 275
 276 #define S2IO_TEST_LEN   sizeof(s2io_gstrings) / ETH_GSTRING_LEN
 277 #define S2IO_STRINGS_LEN        S2IO_TEST_LEN * ETH_GSTRING_LEN
 278
 279 #define S2IO_TIMER_CONF(timer, handle, arg, exp)                \
 280                         init_timer(&timer);                     \
 281                         timer.function = handle;                \
 282                         timer.data = (unsigned long) arg;       \
 283                         mod_timer(&timer, (jiffies + exp))      \
 284
 285 /* Add the vlan */
 286 static void s2io_vlan_rx_register(struct net_device *dev,
 287                                         struct vlan_group *grp)
 288 {
 289         nic_t *nic = dev->priv;
 290         unsigned long flags;
 291
 292         spin_lock_irqsave(&nic->tx_lock, flags);
 293         nic->vlgrp = grp;
 294         spin_unlock_irqrestore(&nic->tx_lock, flags);
 295 }
 296
 297 /* Unregister the vlan */
 298 static void s2io_vlan_rx_kill_vid(struct net_device *dev, unsigned long vid)
 299 {
 300         nic_t *nic = dev->priv;
 301         unsigned long flags;
 302
 303         spin_lock_irqsave(&nic->tx_lock, flags);
 304         if (nic->vlgrp)
 305                 nic->vlgrp->vlan_devices[vid] = NULL;
 306         spin_unlock_irqrestore(&nic->tx_lock, flags);
 307 }
 308
 309 /*
 310  * Constants to be programmed into the Xena's registers, to configure
 311  * the XAUI.
 312  */
 313
 314 #define END_SIGN        0x0
 315 static const u64 herc_act_dtx_cfg[] = {
 316         /* Set address */
 317         0x8000051536750000ULL, 0x80000515367500E0ULL,
 318         /* Write data */
 319         0x8000051536750004ULL, 0x80000515367500E4ULL,
 320         /* Set address */
 321         0x80010515003F0000ULL, 0x80010515003F00E0ULL,
 322         /* Write data */
 323         0x80010515003F0004ULL, 0x80010515003F00E4ULL,
 324         /* Set address */
 325         0x801205150D440000ULL, 0x801205150D4400E0ULL,
 326         /* Write data */
 327         0x801205150D440004ULL, 0x801205150D4400E4ULL,
 328         /* Set address */
 329         0x80020515F2100000ULL, 0x80020515F21000E0ULL,
 330         /* Write data */
 331         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 332         /* Done */
 333         END_SIGN
 334 };
 335
 336 static const u64 xena_dtx_cfg[] = {
 337         /* Set address */
 338         0x8000051500000000ULL, 0x80000515000000E0ULL,
 339         /* Write data */
 340         0x80000515D9350004ULL, 0x80000515D93500E4ULL,
 341         /* Set address */
 342         0x8001051500000000ULL, 0x80010515000000E0ULL,
 343         /* Write data */
 344         0x80010515001E0004ULL, 0x80010515001E00E4ULL,
 345         /* Set address */
 346         0x8002051500000000ULL, 0x80020515000000E0ULL,
 347         /* Write data */
 348         0x80020515F2100004ULL, 0x80020515F21000E4ULL,
 349         END_SIGN
 350 };
 351
 352 /*
 353  * Constants for Fixing the MacAddress problem seen mostly on
 354  * Alpha machines.
 355  */
 356 static const u64 fix_mac[] = {
 357         0x0060000000000000ULL, 0x0060600000000000ULL,
 358         0x0040600000000000ULL, 0x0000600000000000ULL,
 359         0x0020600000000000ULL, 0x0060600000000000ULL,
 360         0x0020600000000000ULL, 0x0060600000000000ULL,
 361         0x0020600000000000ULL, 0x0060600000000000ULL,
 362         0x0020600000000000ULL, 0x0060600000000000ULL,
 363         0x0020600000000000ULL, 0x0060600000000000ULL,
 364         0x0020600000000000ULL, 0x0060600000000000ULL,
 365         0x0020600000000000ULL, 0x0060600000000000ULL,
 366         0x0020600000000000ULL, 0x0060600000000000ULL,
 367         0x0020600000000000ULL, 0x0060600000000000ULL,
 368         0x0020600000000000ULL, 0x0060600000000000ULL,
 369         0x0020600000000000ULL, 0x0000600000000000ULL,
 370         0x0040600000000000ULL, 0x0060600000000000ULL,
 371         END_SIGN
 372 };
 373
 374 MODULE_AUTHOR("Raghavendra Koushik <raghavendra.koushik@neterion.com>");
 375 MODULE_LICENSE("GPL");
 376 MODULE_VERSION(DRV_VERSION);
 377
 378
 379 /* Module Loadable parameters. */
 380 S2IO_PARM_INT(tx_fifo_num, 1);
 381 S2IO_PARM_INT(rx_ring_num, 1);
 382
 383
 384 S2IO_PARM_INT(rx_ring_mode, 1);
 385 S2IO_PARM_INT(use_continuous_tx_intrs, 1);
 386 S2IO_PARM_INT(rmac_pause_time, 0x100);
 387 S2IO_PARM_INT(mc_pause_threshold_q0q3, 187);
 388 S2IO_PARM_INT(mc_pause_threshold_q4q7, 187);
 389 S2IO_PARM_INT(shared_splits, 0);
 390 S2IO_PARM_INT(tmac_util_period, 5);
 391 S2IO_PARM_INT(rmac_util_period, 5);
 392 S2IO_PARM_INT(bimodal, 0);
 393 S2IO_PARM_INT(l3l4hdr_size, 128);
 394 /* Frequency of Rx desc syncs expressed as power of 2 */
 395 S2IO_PARM_INT(rxsync_frequency, 3);
 396 /* Interrupt type. Values can be 0(INTA), 1(MSI), 2(MSI_X) */
 397 S2IO_PARM_INT(intr_type, 0);
 398 /* Large receive offload feature */
 399 S2IO_PARM_INT(lro, 0);
 400 /* Max pkts to be aggregated by LRO at one time. If not specified,
 401  * aggregation happens until we hit max IP pkt size(64K)
 402  */
 403 S2IO_PARM_INT(lro_max_pkts, 0xFFFF);
 404 S2IO_PARM_INT(indicate_max_pkts, 0);
 405
 406 S2IO_PARM_INT(napi, 1);
 407 S2IO_PARM_INT(ufo, 0);
 408
 409 static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
 410     {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
 411 static unsigned int rx_ring_sz[MAX_RX_RINGS] =
 412     {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
 413 static unsigned int rts_frm_len[MAX_RX_RINGS] =
 414     {[0 ...(MAX_RX_RINGS - 1)] = 0 };
 415
 416 module_param_array(tx_fifo_len, uint, NULL, 0);
 417 module_param_array(rx_ring_sz, uint, NULL, 0);
 418 module_param_array(rts_frm_len, uint, NULL, 0);
 419
 420 /*
 421  * S2IO device table.
 422  * This table lists all the devices that this driver supports.
 423  */
 424 static struct pci_device_id s2io_tbl[] __devinitdata = {
 425         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_WIN,
 426          PCI_ANY_ID, PCI_ANY_ID},
 427         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_UNI,
 428          PCI_ANY_ID, PCI_ANY_ID},
 429         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_WIN,
 430          PCI_ANY_ID, PCI_ANY_ID},
 431         {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_UNI,
 432          PCI_ANY_ID, PCI_ANY_ID},
 433         {0,}
 434 };
 435
 436 MODULE_DEVICE_TABLE(pci, s2io_tbl);
 437
 438 static struct pci_driver s2io_driver = {
 439       .name = "S2IO",
 440       .id_table = s2io_tbl,
 441       .probe = s2io_init_nic,
 442       .remove = __devexit_p(s2io_rem_nic),
 443 };
 444
 445 /* A simplifier macro used both by init and free shared_mem Fns(). */
 446 #define TXD_MEM_PAGE_CNT(len, per_each) ((len+per_each - 1) / per_each)
 447
 448 /**
 449  * init_shared_mem - Allocation and Initialization of Memory
 450  * @nic: Device private variable.
 451  * Description: The function allocates all the memory areas shared
 452  * between the NIC and the driver. This includes Tx descriptors,
 453  * Rx descriptors and the statistics block.
 454  */
 455
 456 static int init_shared_mem(struct s2io_nic *nic)
 457 {
 458         u32 size;
 459         void *tmp_v_addr, *tmp_v_addr_next;
 460         dma_addr_t tmp_p_addr, tmp_p_addr_next;
 461         RxD_block_t *pre_rxd_blk = NULL;
 462         int i, j, blk_cnt, rx_sz, tx_sz;
 463         int lst_size, lst_per_page;
 464         struct net_device *dev = nic->dev;
 465         unsigned long tmp;
 466         buffAdd_t *ba;
 467
 468         mac_info_t *mac_control;
 469         struct config_param *config;
 470
 471         mac_control = &nic->mac_control;
 472         config = &nic->config;
 473
 474
 475         /* Allocation and initialization of TXDLs in FIOFs */
 476         size = 0;
 477         for (i = 0; i < config->tx_fifo_num; i++) {
 478                 size += config->tx_cfg[i].fifo_len;
 479         }
 480         if (size > MAX_AVAILABLE_TXDS) {
 481                 DBG_PRINT(ERR_DBG, "s2io: Requested TxDs too high, ");
 482                 DBG_PRINT(ERR_DBG, "Requested: %d, max supported: 8192\n", size);
 483                 return -EINVAL;
 484         }
 485
 486         lst_size = (sizeof(TxD_t) * config->max_txds);
 487         tx_sz = lst_size * size;
 488         lst_per_page = PAGE_SIZE / lst_size;
 489
 490         for (i = 0; i < config->tx_fifo_num; i++) {
 491                 int fifo_len = config->tx_cfg[i].fifo_len;
 492                 int list_holder_size = fifo_len * sizeof(list_info_hold_t);
 493                 mac_control->fifos[i].list_info = kmalloc(list_holder_size,
 494                                                           GFP_KERNEL);
 495                 if (!mac_control->fifos[i].list_info) {
 496                         DBG_PRINT(ERR_DBG,
 497                                   "Malloc failed for list_info\n");
 498                         return -ENOMEM;
 499                 }
 500                 memset(mac_control->fifos[i].list_info, 0, list_holder_size);
 501         }
 502         for (i = 0; i < config->tx_fifo_num; i++) {
 503                 int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 504                                                 lst_per_page);
 505                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
 506                 mac_control->fifos[i].tx_curr_put_info.fifo_len =
 507                     config->tx_cfg[i].fifo_len - 1;
 508                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
 509                 mac_control->fifos[i].tx_curr_get_info.fifo_len =
 510                     config->tx_cfg[i].fifo_len - 1;
 511                 mac_control->fifos[i].fifo_no = i;
 512                 mac_control->fifos[i].nic = nic;
 513                 mac_control->fifos[i].max_txds = MAX_SKB_FRAGS + 2;
 514
 515                 for (j = 0; j < page_num; j++) {
 516                         int k = 0;
 517                         dma_addr_t tmp_p;
 518                         void *tmp_v;
 519                         tmp_v = pci_alloc_consistent(nic->pdev,
 520                                                      PAGE_SIZE, &tmp_p);
 521                         if (!tmp_v) {
 522                                 DBG_PRINT(ERR_DBG,
 523                                           "pci_alloc_consistent ");
 524                                 DBG_PRINT(ERR_DBG, "failed for TxDL\n");
 525                                 return -ENOMEM;
 526                         }
 527                         /* If we got a zero DMA address(can happen on
 528                          * certain platforms like PPC), reallocate.
 529                          * Store virtual address of page we don't want,
 530                          * to be freed later.
 531                          */
 532                         if (!tmp_p) {
 533                                 mac_control->zerodma_virt_addr = tmp_v;
 534                                 DBG_PRINT(INIT_DBG,
 535                                 "%s: Zero DMA address for TxDL. ", dev->name);
 536                                 DBG_PRINT(INIT_DBG,
 537                                 "Virtual address %p\n", tmp_v);
 538                                 tmp_v = pci_alloc_consistent(nic->pdev,
 539                                                      PAGE_SIZE, &tmp_p);
 540                                 if (!tmp_v) {
 541                                         DBG_PRINT(ERR_DBG,
 542                                           "pci_alloc_consistent ");
 543                                         DBG_PRINT(ERR_DBG, "failed for TxDL\n");
 544                                         return -ENOMEM;
 545                                 }
 546                         }
 547                         while (k < lst_per_page) {
 548                                 int l = (j * lst_per_page) + k;
 549                                 if (l == config->tx_cfg[i].fifo_len)
 550                                         break;
 551                                 mac_control->fifos[i].list_info[l].list_virt_addr =
 552                                     tmp_v + (k * lst_size);
 553                                 mac_control->fifos[i].list_info[l].list_phy_addr =
 554                                     tmp_p + (k * lst_size);
 555                                 k++;
 556                         }
 557                 }
 558         }
 559
 560         nic->ufo_in_band_v = kcalloc(size, sizeof(u64), GFP_KERNEL);
 561         if (!nic->ufo_in_band_v)
 562                 return -ENOMEM;
 563
 564         /* Allocation and initialization of RXDs in Rings */
 565         size = 0;
 566         for (i = 0; i < config->rx_ring_num; i++) {
 567                 if (config->rx_cfg[i].num_rxd %
 568                     (rxd_count[nic->rxd_mode] + 1)) {
 569                         DBG_PRINT(ERR_DBG, "%s: RxD count of ", dev->name);
 570                         DBG_PRINT(ERR_DBG, "Ring%d is not a multiple of ",
 571                                   i);
 572                         DBG_PRINT(ERR_DBG, "RxDs per Block");
 573                         return FAILURE;
 574                 }
 575                 size += config->rx_cfg[i].num_rxd;
 576                 mac_control->rings[i].block_count =
 577                         config->rx_cfg[i].num_rxd /
 578                         (rxd_count[nic->rxd_mode] + 1 );
 579                 mac_control->rings[i].pkt_cnt = config->rx_cfg[i].num_rxd -
 580                         mac_control->rings[i].block_count;
 581         }
 582         if (nic->rxd_mode == RXD_MODE_1)
 583                 size = (size * (sizeof(RxD1_t)));
 584         else
 585                 size = (size * (sizeof(RxD3_t)));
 586         rx_sz = size;
 587
 588         for (i = 0; i < config->rx_ring_num; i++) {
 589                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
 590                 mac_control->rings[i].rx_curr_get_info.offset = 0;
 591                 mac_control->rings[i].rx_curr_get_info.ring_len =
 592                     config->rx_cfg[i].num_rxd - 1;
 593                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
 594                 mac_control->rings[i].rx_curr_put_info.offset = 0;
 595                 mac_control->rings[i].rx_curr_put_info.ring_len =
 596                     config->rx_cfg[i].num_rxd - 1;
 597                 mac_control->rings[i].nic = nic;
 598                 mac_control->rings[i].ring_no = i;
 599
 600                 blk_cnt = config->rx_cfg[i].num_rxd /
 601                                 (rxd_count[nic->rxd_mode] + 1);
 602                 /*  Allocating all the Rx blocks */
 603                 for (j = 0; j < blk_cnt; j++) {
 604                         rx_block_info_t *rx_blocks;
 605                         int l;
 606
 607                         rx_blocks = &mac_control->rings[i].rx_blocks[j];
 608                         size = SIZE_OF_BLOCK; //size is always page size
 609                         tmp_v_addr = pci_alloc_consistent(nic->pdev, size,
 610                                                           &tmp_p_addr);
 611                         if (tmp_v_addr == NULL) {
 612                                 /*
 613                                  * In case of failure, free_shared_mem()
 614                                  * is called, which should free any
 615                                  * memory that was alloced till the
 616                                  * failure happened.
 617                                  */
 618                                 rx_blocks->block_virt_addr = tmp_v_addr;
 619                                 return -ENOMEM;
 620                         }
 621                         memset(tmp_v_addr, 0, size);
 622                         rx_blocks->block_virt_addr = tmp_v_addr;
 623                         rx_blocks->block_dma_addr = tmp_p_addr;
 624                         rx_blocks->rxds = kmalloc(sizeof(rxd_info_t)*
 625                                                   rxd_count[nic->rxd_mode],
 626                                                   GFP_KERNEL);
 627                         for (l=0; l<rxd_count[nic->rxd_mode];l++) {
 628                                 rx_blocks->rxds[l].virt_addr =
 629                                         rx_blocks->block_virt_addr +
 630                                         (rxd_size[nic->rxd_mode] * l);
 631                                 rx_blocks->rxds[l].dma_addr =
 632                                         rx_blocks->block_dma_addr +
 633                                         (rxd_size[nic->rxd_mode] * l);
 634                         }
 635                 }
 636                 /* Interlinking all Rx Blocks */
 637                 for (j = 0; j < blk_cnt; j++) {
 638                         tmp_v_addr =
 639                                 mac_control->rings[i].rx_blocks[j].block_virt_addr;
 640                         tmp_v_addr_next =
 641                                 mac_control->rings[i].rx_blocks[(j + 1) %
 642                                               blk_cnt].block_virt_addr;
 643                         tmp_p_addr =
 644                                 mac_control->rings[i].rx_blocks[j].block_dma_addr;
 645                         tmp_p_addr_next =
 646                                 mac_control->rings[i].rx_blocks[(j + 1) %
 647                                               blk_cnt].block_dma_addr;
 648
 649                         pre_rxd_blk = (RxD_block_t *) tmp_v_addr;
 650                         pre_rxd_blk->reserved_2_pNext_RxD_block =
 651                             (unsigned long) tmp_v_addr_next;
 652                         pre_rxd_blk->pNext_RxD_Blk_physical =
 653                             (u64) tmp_p_addr_next;
 654                 }
 655         }
 656         if (nic->rxd_mode >= RXD_MODE_3A) {
 657                 /*
 658                  * Allocation of Storages for buffer addresses in 2BUFF mode
 659                  * and the buffers as well.
 660                  */
 661                 for (i = 0; i < config->rx_ring_num; i++) {
 662                         blk_cnt = config->rx_cfg[i].num_rxd /
 663                            (rxd_count[nic->rxd_mode]+ 1);
 664                         mac_control->rings[i].ba =
 665                                 kmalloc((sizeof(buffAdd_t *) * blk_cnt),
 666                                      GFP_KERNEL);
 667                         if (!mac_control->rings[i].ba)
 668                                 return -ENOMEM;
 669                         for (j = 0; j < blk_cnt; j++) {
 670                                 int k = 0;
 671                                 mac_control->rings[i].ba[j] =
 672                                         kmalloc((sizeof(buffAdd_t) *
 673                                                 (rxd_count[nic->rxd_mode] + 1)),
 674                                                 GFP_KERNEL);
 675                                 if (!mac_control->rings[i].ba[j])
 676                                         return -ENOMEM;
 677                                 while (k != rxd_count[nic->rxd_mode]) {
 678                                         ba = &mac_control->rings[i].ba[j][k];
 679
 680                                         ba->ba_0_org = (void *) kmalloc
 681                                             (BUF0_LEN + ALIGN_SIZE, GFP_KERNEL);
 682                                         if (!ba->ba_0_org)
 683                                                 return -ENOMEM;
 684                                         tmp = (unsigned long)ba->ba_0_org;
 685                                         tmp += ALIGN_SIZE;
 686                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 687                                         ba->ba_0 = (void *) tmp;
 688
 689                                         ba->ba_1_org = (void *) kmalloc
 690                                             (BUF1_LEN + ALIGN_SIZE, GFP_KERNEL);
 691                                         if (!ba->ba_1_org)
 692                                                 return -ENOMEM;
 693                                         tmp = (unsigned long) ba->ba_1_org;
 694                                         tmp += ALIGN_SIZE;
 695                                         tmp &= ~((unsigned long) ALIGN_SIZE);
 696                                         ba->ba_1 = (void *) tmp;
 697                                         k++;
 698                                 }
 699                         }
 700                 }
 701         }
 702
 703         /* Allocation and initialization of Statistics block */
 704         size = sizeof(StatInfo_t);
 705         mac_control->stats_mem = pci_alloc_consistent
 706             (nic->pdev, size, &mac_control->stats_mem_phy);
 707
 708         if (!mac_control->stats_mem) {
 709                 /*
 710                  * In case of failure, free_shared_mem() is called, which
 711                  * should free any memory that was alloced till the
 712                  * failure happened.
 713                  */
 714                 return -ENOMEM;
 715         }
 716         mac_control->stats_mem_sz = size;
 717
 718         tmp_v_addr = mac_control->stats_mem;
 719         mac_control->stats_info = (StatInfo_t *) tmp_v_addr;
 720         memset(tmp_v_addr, 0, size);
 721         DBG_PRINT(INIT_DBG, "%s:Ring Mem PHY: 0x%llx\n", dev->name,
 722                   (unsigned long long) tmp_p_addr);
 723
 724         return SUCCESS;
 725 }
 726
 727 /**
 728  * free_shared_mem - Free the allocated Memory
 729  * @nic:  Device private variable.
 730  * Description: This function is to free all memory locations allocated by
 731  * the init_shared_mem() function and return it to the kernel.
 732  */
 733
 734 static void free_shared_mem(struct s2io_nic *nic)
 735 {
 736         int i, j, blk_cnt, size;
 737         void *tmp_v_addr;
 738         dma_addr_t tmp_p_addr;
 739         mac_info_t *mac_control;
 740         struct config_param *config;
 741         int lst_size, lst_per_page;
 742         struct net_device *dev = nic->dev;
 743
 744         if (!nic)
 745                 return;
 746
 747         mac_control = &nic->mac_control;
 748         config = &nic->config;
 749
 750         lst_size = (sizeof(TxD_t) * config->max_txds);
 751         lst_per_page = PAGE_SIZE / lst_size;
 752
 753         for (i = 0; i < config->tx_fifo_num; i++) {
 754                 int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
 755                                                 lst_per_page);
 756                 for (j = 0; j < page_num; j++) {
 757                         int mem_blks = (j * lst_per_page);
 758                         if (!mac_control->fifos[i].list_info)
 759                                 return;
 760                         if (!mac_control->fifos[i].list_info[mem_blks].
 761                                  list_virt_addr)
 762                                 break;
 763                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 764                                             mac_control->fifos[i].
 765                                             list_info[mem_blks].
 766                                             list_virt_addr,
 767                                             mac_control->fifos[i].
 768                                             list_info[mem_blks].
 769                                             list_phy_addr);
 770                 }
 771                 /* If we got a zero DMA address during allocation,
 772                  * free the page now
 773                  */
 774                 if (mac_control->zerodma_virt_addr) {
 775                         pci_free_consistent(nic->pdev, PAGE_SIZE,
 776                                             mac_control->zerodma_virt_addr,
 777                                             (dma_addr_t)0);
 778                         DBG_PRINT(INIT_DBG,
 779                                 "%s: Freeing TxDL with zero DMA addr. ",
 780                                 dev->name);
 781                         DBG_PRINT(INIT_DBG, "Virtual address %p\n",
 782                                 mac_control->zerodma_virt_addr);
 783                 }
 784                 kfree(mac_control->fifos[i].list_info);
 785         }
 786
 787         size = SIZE_OF_BLOCK;
 788         for (i = 0; i < config->rx_ring_num; i++) {
 789                 blk_cnt = mac_control->rings[i].block_count;
 790                 for (j = 0; j < blk_cnt; j++) {
 791                         tmp_v_addr = mac_control->rings[i].rx_blocks[j].
 792                                 block_virt_addr;
 793                         tmp_p_addr = mac_control->rings[i].rx_blocks[j].
 794                                 block_dma_addr;
 795                         if (tmp_v_addr == NULL)
 796                                 break;
 797                         pci_free_consistent(nic->pdev, size,
 798                                             tmp_v_addr, tmp_p_addr);
 799                         kfree(mac_control->rings[i].rx_blocks[j].rxds);
 800                 }
 801         }
 802
 803         if (nic->rxd_mode >= RXD_MODE_3A) {
 804                 /* Freeing buffer storage addresses in 2BUFF mode. */
 805                 for (i = 0; i < config->rx_ring_num; i++) {
 806                         blk_cnt = config->rx_cfg[i].num_rxd /
 807                             (rxd_count[nic->rxd_mode] + 1);
 808                         for (j = 0; j < blk_cnt; j++) {
 809                                 int k = 0;
 810                                 if (!mac_control->rings[i].ba[j])
 811                                         continue;
 812                                 while (k != rxd_count[nic->rxd_mode]) {
 813                                         buffAdd_t *ba =
 814                                                 &mac_control->rings[i].ba[j][k];
 815                                         kfree(ba->ba_0_org);
 816                                         kfree(ba->ba_1_org);
 817                                         k++;
 818                                 }
 819                                 kfree(mac_control->rings[i].ba[j]);
 820                         }
 821                         kfree(mac_control->rings[i].ba);
 822                 }
 823         }
 824
 825         if (mac_control->stats_mem) {
 826                 pci_free_consistent(nic->pdev,
 827                                     mac_control->stats_mem_sz,
 828                                     mac_control->stats_mem,
 829                                     mac_control->stats_mem_phy);
 830         }
 831         if (nic->ufo_in_band_v)
 832                 kfree(nic->ufo_in_band_v);
 833 }
 834
 835 /**
 836  * s2io_verify_pci_mode -
 837  */
 838
 839 static int s2io_verify_pci_mode(nic_t *nic)
 840 {
 841         XENA_dev_config_t __iomem *bar0 = nic->bar0;
 842         register u64 val64 = 0;
 843         int     mode;
 844
 845         val64 = readq(&bar0->pci_mode);
 846         mode = (u8)GET_PCI_MODE(val64);
 847
 848         if ( val64 & PCI_MODE_UNKNOWN_MODE)
 849                 return -1;      /* Unknown PCI mode */
 850         return mode;
 851 }
 852
 853 #define NEC_VENID   0x1033
 854 #define NEC_DEVID   0x0125
 855 static int s2io_on_nec_bridge(struct pci_dev *s2io_pdev)
 856 {
 857         struct pci_dev *tdev = NULL;
 858         while ((tdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, tdev)) != NULL) {
 859                 if (tdev->vendor == NEC_VENID && tdev->device == NEC_DEVID) {
 860                         if (tdev->bus == s2io_pdev->bus->parent)
 861                                 pci_dev_put(tdev);
 862                                 return 1;
 863                 }
 864         }
 865         return 0;
 866 }
 867
 868 static int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
 869 /**
 870  * s2io_print_pci_mode -
 871  */
 872 static int s2io_print_pci_mode(nic_t *nic)
 873 {
 874         XENA_dev_config_t __iomem *bar0 = nic->bar0;
 875         register u64 val64 = 0;
 876         int     mode;
 877         struct config_param *config = &nic->config;
 878
 879         val64 = readq(&bar0->pci_mode);
 880         mode = (u8)GET_PCI_MODE(val64);
 881
 882         if ( val64 & PCI_MODE_UNKNOWN_MODE)
 883                 return -1;      /* Unknown PCI mode */
 884
 885         config->bus_speed = bus_speed[mode];
 886
 887         if (s2io_on_nec_bridge(nic->pdev)) {
 888                 DBG_PRINT(ERR_DBG, "%s: Device is on PCI-E bus\n",
 889                                                         nic->dev->name);
 890                 return mode;
 891         }
 892
 893         if (val64 & PCI_MODE_32_BITS) {
 894                 DBG_PRINT(ERR_DBG, "%s: Device is on 32 bit ", nic->dev->name);
 895         } else {
 896                 DBG_PRINT(ERR_DBG, "%s: Device is on 64 bit ", nic->dev->name);
 897         }
 898
 899         switch(mode) {
 900                 case PCI_MODE_PCI_33:
 901                         DBG_PRINT(ERR_DBG, "33MHz PCI bus\n");
 902                         break;
 903                 case PCI_MODE_PCI_66:
 904                         DBG_PRINT(ERR_DBG, "66MHz PCI bus\n");
 905                         break;
 906                 case PCI_MODE_PCIX_M1_66:
 907                         DBG_PRINT(ERR_DBG, "66MHz PCIX(M1) bus\n");
 908                         break;
 909                 case PCI_MODE_PCIX_M1_100:
 910                         DBG_PRINT(ERR_DBG, "100MHz PCIX(M1) bus\n");
 911                         break;
 912                 case PCI_MODE_PCIX_M1_133:
 913                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M1) bus\n");
 914                         break;
 915                 case PCI_MODE_PCIX_M2_66:
 916                         DBG_PRINT(ERR_DBG, "133MHz PCIX(M2) bus\n");
 917                         break;
 918                 case PCI_MODE_PCIX_M2_100:
 919                         DBG_PRINT(ERR_DBG, "200MHz PCIX(M2) bus\n");
 920                         break;
 921                 case PCI_MODE_PCIX_M2_133:
 922                         DBG_PRINT(ERR_DBG, "266MHz PCIX(M2) bus\n");
 923                         break;
 924                 default:
 925                         return -1;      /* Unsupported bus speed */
 926         }
 927
 928         return mode;
 929 }
 930
 931 /**
 932  *  init_nic - Initialization of hardware
 933  *  @nic: device peivate variable
 934  *  Description: The function sequentially configures every block
 935  *  of the H/W from their reset values.
 936  *  Return Value:  SUCCESS on success and
 937  *  '-1' on failure (endian settings incorrect).
 938  */
 939
 940 static int init_nic(struct s2io_nic *nic)
 941 {
 942         XENA_dev_config_t __iomem *bar0 = nic->bar0;
 943         struct net_device *dev = nic->dev;
 944         register u64 val64 = 0;
 945         void __iomem *add;
 946         u32 time;
 947         int i, j;
 948         mac_info_t *mac_control;
 949         struct config_param *config;
 950         int dtx_cnt = 0;
 951         unsigned long long mem_share;
 952         int mem_size;
 953
 954         mac_control = &nic->mac_control;
 955         config = &nic->config;
 956
 957         /* to set the swapper controle on the card */
 958         if(s2io_set_swapper(nic)) {
 959                 DBG_PRINT(ERR_DBG,"ERROR: Setting Swapper failed\n");
 960                 return -1;
 961         }
 962
 963         /*
 964          * Herc requires EOI to be removed from reset before XGXS, so..
 965          */
 966         if (nic->device_type & XFRAME_II_DEVICE) {
 967                 val64 = 0xA500000000ULL;
 968                 writeq(val64, &bar0->sw_reset);
 969                 msleep(500);
 970                 val64 = readq(&bar0->sw_reset);
 971         }
 972
 973         /* Remove XGXS from reset state */
 974         val64 = 0;
 975         writeq(val64, &bar0->sw_reset);
 976         msleep(500);
 977         val64 = readq(&bar0->sw_reset);
 978
 979         /*  Enable Receiving broadcasts */
 980         add = &bar0->mac_cfg;
 981         val64 = readq(&bar0->mac_cfg);
 982         val64 |= MAC_RMAC_BCAST_ENABLE;
 983         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
 984         writel((u32) val64, add);
 985         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
 986         writel((u32) (val64 >> 32), (add + 4));
 987
 988         /* Read registers in all blocks */
 989         val64 = readq(&bar0->mac_int_mask);
 990         val64 = readq(&bar0->mc_int_mask);
 991         val64 = readq(&bar0->xgxs_int_mask);
 992
 993         /*  Set MTU */
 994         val64 = dev->mtu;
 995         writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
 996
 997         if (nic->device_type & XFRAME_II_DEVICE) {
 998                 while (herc_act_dtx_cfg[dtx_cnt] != END_SIGN) {
 999                         SPECIAL_REG_WRITE(herc_act_dtx_cfg[dtx_cnt],
1000                                           &bar0->dtx_control, UF);
1001                         if (dtx_cnt & 0x1)
1002                                 msleep(1); /* Necessary!! */
1003                         dtx_cnt++;
1004                 }
1005         } else {
1006                 while (xena_dtx_cfg[dtx_cnt] != END_SIGN) {
1007                         SPECIAL_REG_WRITE(xena_dtx_cfg[dtx_cnt],
1008                                           &bar0->dtx_control, UF);
1009                         val64 = readq(&bar0->dtx_control);
1010                         dtx_cnt++;
1011                 }
1012         }
1013
1014         /*  Tx DMA Initialization */
1015         val64 = 0;
1016         writeq(val64, &bar0->tx_fifo_partition_0);
1017         writeq(val64, &bar0->tx_fifo_partition_1);
1018         writeq(val64, &bar0->tx_fifo_partition_2);
1019         writeq(val64, &bar0->tx_fifo_partition_3);
1020
1021
1022         for (i = 0, j = 0; i < config->tx_fifo_num; i++) {
1023                 val64 |=
1024                     vBIT(config->tx_cfg[i].fifo_len - 1, ((i * 32) + 19),
1025                          13) | vBIT(config->tx_cfg[i].fifo_priority,
1026                                     ((i * 32) + 5), 3);
1027
1028                 if (i == (config->tx_fifo_num - 1)) {
1029                         if (i % 2 == 0)
1030                                 i++;
1031                 }
1032
1033                 switch (i) {
1034                 case 1:
1035                         writeq(val64, &bar0->tx_fifo_partition_0);
1036                         val64 = 0;
1037                         break;
1038                 case 3:
1039                         writeq(val64, &bar0->tx_fifo_partition_1);
1040                         val64 = 0;
1041                         break;
1042                 case 5:
1043                         writeq(val64, &bar0->tx_fifo_partition_2);
1044                         val64 = 0;
1045                         break;
1046                 case 7:
1047                         writeq(val64, &bar0->tx_fifo_partition_3);
1048                         break;
1049                 }
1050         }
1051
1052         /*
1053          * Disable 4 PCCs for Xena1, 2 and 3 as per H/W bug
1054          * SXE-008 TRANSMIT DMA ARBITRATION ISSUE.
1055          */
1056         if ((nic->device_type == XFRAME_I_DEVICE) &&
1057                 (get_xena_rev_id(nic->pdev) < 4))
1058                 writeq(PCC_ENABLE_FOUR, &bar0->pcc_enable);
1059
1060         val64 = readq(&bar0->tx_fifo_partition_0);
1061         DBG_PRINT(INIT_DBG, "Fifo partition at: 0x%p is: 0x%llx\n",
1062                   &bar0->tx_fifo_partition_0, (unsigned long long) val64);
1063
1064         /*
1065          * Initialization of Tx_PA_CONFIG register to ignore packet
1066          * integrity checking.
1067          */
1068         val64 = readq(&bar0->tx_pa_cfg);
1069         val64 |= TX_PA_CFG_IGNORE_FRM_ERR | TX_PA_CFG_IGNORE_SNAP_OUI |
1070             TX_PA_CFG_IGNORE_LLC_CTRL | TX_PA_CFG_IGNORE_L2_ERR;
1071         writeq(val64, &bar0->tx_pa_cfg);
1072
1073         /* Rx DMA intialization. */
1074         val64 = 0;
1075         for (i = 0; i < config->rx_ring_num; i++) {
1076                 val64 |=
1077                     vBIT(config->rx_cfg[i].ring_priority, (5 + (i * 8)),
1078                          3);
1079         }
1080         writeq(val64, &bar0->rx_queue_priority);
1081
1082         /*
1083          * Allocating equal share of memory to all the
1084          * configured Rings.
1085          */
1086         val64 = 0;
1087         if (nic->device_type & XFRAME_II_DEVICE)
1088                 mem_size = 32;
1089         else
1090                 mem_size = 64;
1091
1092         for (i = 0; i < config->rx_ring_num; i++) {
1093                 switch (i) {
1094                 case 0:
1095                         mem_share = (mem_size / config->rx_ring_num +
1096                                      mem_size % config->rx_ring_num);
1097                         val64 |= RX_QUEUE_CFG_Q0_SZ(mem_share);
1098                         continue;
1099                 case 1:
1100                         mem_share = (mem_size / config->rx_ring_num);
1101                         val64 |= RX_QUEUE_CFG_Q1_SZ(mem_share);
1102                         continue;
1103                 case 2:
1104                         mem_share = (mem_size / config->rx_ring_num);
1105                         val64 |= RX_QUEUE_CFG_Q2_SZ(mem_share);
1106                         continue;
1107                 case 3:
1108                         mem_share = (mem_size / config->rx_ring_num);
1109                         val64 |= RX_QUEUE_CFG_Q3_SZ(mem_share);
1110                         continue;
1111                 case 4:
1112                         mem_share = (mem_size / config->rx_ring_num);
1113                         val64 |= RX_QUEUE_CFG_Q4_SZ(mem_share);
1114                         continue;
1115                 case 5:
1116                         mem_share = (mem_size / config->rx_ring_num);
1117                         val64 |= RX_QUEUE_CFG_Q5_SZ(mem_share);
1118                         continue;
1119                 case 6:
1120                         mem_share = (mem_size / config->rx_ring_num);
1121                         val64 |= RX_QUEUE_CFG_Q6_SZ(mem_share);
1122                         continue;
1123                 case 7:
1124                         mem_share = (mem_size / config->rx_ring_num);
1125                         val64 |= RX_QUEUE_CFG_Q7_SZ(mem_share);
1126                         continue;
1127                 }
1128         }
1129         writeq(val64, &bar0->rx_queue_cfg);
1130
1131         /*
1132          * Filling Tx round robin registers
1133          * as per the number of FIFOs
1134          */
1135         switch (config->tx_fifo_num) {
1136         case 1:
1137                 val64 = 0x0000000000000000ULL;
1138                 writeq(val64, &bar0->tx_w_round_robin_0);
1139                 writeq(val64, &bar0->tx_w_round_robin_1);
1140                 writeq(val64, &bar0->tx_w_round_robin_2);
1141                 writeq(val64, &bar0->tx_w_round_robin_3);
1142                 writeq(val64, &bar0->tx_w_round_robin_4);
1143                 break;
1144         case 2:
1145                 val64 = 0x0000010000010000ULL;
1146                 writeq(val64, &bar0->tx_w_round_robin_0);
1147                 val64 = 0x0100000100000100ULL;
1148                 writeq(val64, &bar0->tx_w_round_robin_1);
1149                 val64 = 0x0001000001000001ULL;
1150                 writeq(val64, &bar0->tx_w_round_robin_2);
1151                 val64 = 0x0000010000010000ULL;
1152                 writeq(val64, &bar0->tx_w_round_robin_3);
1153                 val64 = 0x0100000000000000ULL;
1154                 writeq(val64, &bar0->tx_w_round_robin_4);
1155                 break;
1156         case 3:
1157                 val64 = 0x0001000102000001ULL;
1158                 writeq(val64, &bar0->tx_w_round_robin_0);
1159                 val64 = 0x0001020000010001ULL;
1160                 writeq(val64, &bar0->tx_w_round_robin_1);
1161                 val64 = 0x0200000100010200ULL;
1162                 writeq(val64, &bar0->tx_w_round_robin_2);
1163                 val64 = 0x0001000102000001ULL;
1164                 writeq(val64, &bar0->tx_w_round_robin_3);
1165                 val64 = 0x0001020000000000ULL;
1166                 writeq(val64, &bar0->tx_w_round_robin_4);
1167                 break;
1168         case 4:
1169                 val64 = 0x0001020300010200ULL;
1170                 writeq(val64, &bar0->tx_w_round_robin_0);
1171                 val64 = 0x0100000102030001ULL;
1172                 writeq(val64, &bar0->tx_w_round_robin_1);
1173                 val64 = 0x0200010000010203ULL;
1174                 writeq(val64, &bar0->tx_w_round_robin_2);
1175                 val64 = 0x0001020001000001ULL;
1176                 writeq(val64, &bar0->tx_w_round_robin_3);
1177                 val64 = 0x0203000100000000ULL;
1178                 writeq(val64, &bar0->tx_w_round_robin_4);
1179                 break;
1180         case 5:
1181                 val64 = 0x0001000203000102ULL;
1182                 writeq(val64, &bar0->tx_w_round_robin_0);
1183                 val64 = 0x0001020001030004ULL;
1184                 writeq(val64, &bar0->tx_w_round_robin_1);
1185                 val64 = 0x0001000203000102ULL;
1186                 writeq(val64, &bar0->tx_w_round_robin_2);
1187                 val64 = 0x0001020001030004ULL;
1188                 writeq(val64, &bar0->tx_w_round_robin_3);
1189                 val64 = 0x0001000000000000ULL;
1190                 writeq(val64, &bar0->tx_w_round_robin_4);
1191                 break;
1192         case 6:
1193                 val64 = 0x0001020304000102ULL;
1194                 writeq(val64, &bar0->tx_w_round_robin_0);
1195                 val64 = 0x0304050001020001ULL;
1196                 writeq(val64, &bar0->tx_w_round_robin_1);
1197                 val64 = 0x0203000100000102ULL;
1198                 writeq(val64, &bar0->tx_w_round_robin_2);
1199                 val64 = 0x0304000102030405ULL;
1200                 writeq(val64, &bar0->tx_w_round_robin_3);
1201                 val64 = 0x0001000200000000ULL;
1202                 writeq(val64, &bar0->tx_w_round_robin_4);
1203                 break;
1204         case 7:
1205                 val64 = 0x0001020001020300ULL;
1206                 writeq(val64, &bar0->tx_w_round_robin_0);
1207                 val64 = 0x0102030400010203ULL;
1208                 writeq(val64, &bar0->tx_w_round_robin_1);
1209                 val64 = 0x0405060001020001ULL;
1210                 writeq(val64, &bar0->tx_w_round_robin_2);
1211                 val64 = 0x0304050000010200ULL;
1212                 writeq(val64, &bar0->tx_w_round_robin_3);
1213                 val64 = 0x0102030000000000ULL;
1214                 writeq(val64, &bar0->tx_w_round_robin_4);
1215                 break;
1216         case 8:
1217                 val64 = 0x0001020300040105ULL;
1218                 writeq(val64, &bar0->tx_w_round_robin_0);
1219                 val64 = 0x0200030106000204ULL;
1220                 writeq(val64, &bar0->tx_w_round_robin_1);
1221                 val64 = 0x0103000502010007ULL;
1222                 writeq(val64, &bar0->tx_w_round_robin_2);
1223                 val64 = 0x0304010002060500ULL;
1224                 writeq(val64, &bar0->tx_w_round_robin_3);
1225                 val64 = 0x0103020400000000ULL;
1226                 writeq(val64, &bar0->tx_w_round_robin_4);
1227                 break;
1228         }
1229
1230         /* Enable all configured Tx FIFO partitions */
1231         val64 = readq(&bar0->tx_fifo_partition_0);
1232         val64 |= (TX_FIFO_PARTITION_EN);
1233         writeq(val64, &bar0->tx_fifo_partition_0);
1234
1235         /* Filling the Rx round robin registers as per the
1236          * number of Rings and steering based on QoS.
1237          */
1238         switch (config->rx_ring_num) {
1239         case 1:
1240                 val64 = 0x8080808080808080ULL;
1241                 writeq(val64, &bar0->rts_qos_steering);
1242                 break;
1243         case 2:
1244                 val64 = 0x0000010000010000ULL;
1245                 writeq(val64, &bar0->rx_w_round_robin_0);
1246                 val64 = 0x0100000100000100ULL;
1247                 writeq(val64, &bar0->rx_w_round_robin_1);
1248                 val64 = 0x0001000001000001ULL;
1249                 writeq(val64, &bar0->rx_w_round_robin_2);
1250                 val64 = 0x0000010000010000ULL;
1251                 writeq(val64, &bar0->rx_w_round_robin_3);
1252                 val64 = 0x0100000000000000ULL;
1253                 writeq(val64, &bar0->rx_w_round_robin_4);
1254
1255                 val64 = 0x8080808040404040ULL;
1256                 writeq(val64, &bar0->rts_qos_steering);
1257                 break;
1258         case 3:
1259                 val64 = 0x0001000102000001ULL;
1260                 writeq(val64, &bar0->rx_w_round_robin_0);
1261                 val64 = 0x0001020000010001ULL;
1262                 writeq(val64, &bar0->rx_w_round_robin_1);
1263                 val64 = 0x0200000100010200ULL;
1264                 writeq(val64, &bar0->rx_w_round_robin_2);
1265                 val64 = 0x0001000102000001ULL;
1266                 writeq(val64, &bar0->rx_w_round_robin_3);
1267                 val64 = 0x0001020000000000ULL;
1268                 writeq(val64, &bar0->rx_w_round_robin_4);
1269
1270                 val64 = 0x8080804040402020ULL;
1271                 writeq(val64, &bar0->rts_qos_steering);
1272                 break;
1273         case 4:
1274                 val64 = 0x0001020300010200ULL;
1275                 writeq(val64, &bar0->rx_w_round_robin_0);
1276                 val64 = 0x0100000102030001ULL;
1277                 writeq(val64, &bar0->rx_w_round_robin_1);
1278                 val64 = 0x0200010000010203ULL;
1279                 writeq(val64, &bar0->rx_w_round_robin_2);
1280                 val64 = 0x0001020001000001ULL;
1281                 writeq(val64, &bar0->rx_w_round_robin_3);
1282                 val64 = 0x0203000100000000ULL;
1283                 writeq(val64, &bar0->rx_w_round_robin_4);
1284
1285                 val64 = 0x8080404020201010ULL;
1286                 writeq(val64, &bar0->rts_qos_steering);
1287                 break;
1288         case 5:
1289                 val64 = 0x0001000203000102ULL;
1290                 writeq(val64, &bar0->rx_w_round_robin_0);
1291                 val64 = 0x0001020001030004ULL;
1292                 writeq(val64, &bar0->rx_w_round_robin_1);
1293                 val64 = 0x0001000203000102ULL;
1294                 writeq(val64, &bar0->rx_w_round_robin_2);
1295                 val64 = 0x0001020001030004ULL;
1296                 writeq(val64, &bar0->rx_w_round_robin_3);
1297                 val64 = 0x0001000000000000ULL;
1298                 writeq(val64, &bar0->rx_w_round_robin_4);
1299
1300                 val64 = 0x8080404020201008ULL;
1301                 writeq(val64, &bar0->rts_qos_steering);
1302                 break;
1303         case 6:
1304                 val64 = 0x0001020304000102ULL;
1305                 writeq(val64, &bar0->rx_w_round_robin_0);
1306                 val64 = 0x0304050001020001ULL;
1307                 writeq(val64, &bar0->rx_w_round_robin_1);
1308                 val64 = 0x0203000100000102ULL;
1309                 writeq(val64, &bar0->rx_w_round_robin_2);
1310                 val64 = 0x0304000102030405ULL;
1311                 writeq(val64, &bar0->rx_w_round_robin_3);
1312                 val64 = 0x0001000200000000ULL;
1313                 writeq(val64, &bar0->rx_w_round_robin_4);
1314
1315                 val64 = 0x8080404020100804ULL;
1316                 writeq(val64, &bar0->rts_qos_steering);
1317                 break;
1318         case 7:
1319                 val64 = 0x0001020001020300ULL;
1320                 writeq(val64, &bar0->rx_w_round_robin_0);
1321                 val64 = 0x0102030400010203ULL;
1322                 writeq(val64, &bar0->rx_w_round_robin_1);
1323                 val64 = 0x0405060001020001ULL;
1324                 writeq(val64, &bar0->rx_w_round_robin_2);
1325                 val64 = 0x0304050000010200ULL;
1326                 writeq(val64, &bar0->rx_w_round_robin_3);
1327                 val64 = 0x0102030000000000ULL;
1328                 writeq(val64, &bar0->rx_w_round_robin_4);
1329
1330                 val64 = 0x8080402010080402ULL;
1331                 writeq(val64, &bar0->rts_qos_steering);
1332                 break;
1333         case 8:
1334                 val64 = 0x0001020300040105ULL;
1335                 writeq(val64, &bar0->rx_w_round_robin_0);
1336                 val64 = 0x0200030106000204ULL;
1337                 writeq(val64, &bar0->rx_w_round_robin_1);
1338                 val64 = 0x0103000502010007ULL;
1339                 writeq(val64, &bar0->rx_w_round_robin_2);
1340                 val64 = 0x0304010002060500ULL;
1341                 writeq(val64, &bar0->rx_w_round_robin_3);
1342                 val64 = 0x0103020400000000ULL;
1343                 writeq(val64, &bar0->rx_w_round_robin_4);
1344
1345                 val64 = 0x8040201008040201ULL;
1346                 writeq(val64, &bar0->rts_qos_steering);
1347                 break;
1348         }
1349
1350         /* UDP Fix */
1351         val64 = 0;
1352         for (i = 0; i < 8; i++)
1353                 writeq(val64, &bar0->rts_frm_len_n[i]);
1354
1355         /* Set the default rts frame length for the rings configured */
1356         val64 = MAC_RTS_FRM_LEN_SET(dev->mtu+22);
1357         for (i = 0 ; i < config->rx_ring_num ; i++)
1358                 writeq(val64, &bar0->rts_frm_len_n[i]);
1359
1360         /* Set the frame length for the configured rings
1361          * desired by the user
1362          */
1363         for (i = 0; i < config->rx_ring_num; i++) {
1364                 /* If rts_frm_len[i] == 0 then it is assumed that user not
1365                  * specified frame length steering.
1366                  * If the user provides the frame length then program
1367                  * the rts_frm_len register for those values or else
1368                  * leave it as it is.
1369                  */
1370                 if (rts_frm_len[i] != 0) {
1371                         writeq(MAC_RTS_FRM_LEN_SET(rts_frm_len[i]),
1372                                 &bar0->rts_frm_len_n[i]);
1373                 }
1374         }
1375
1376         /* Program statistics memory */
1377         writeq(mac_control->stats_mem_phy, &bar0->stat_addr);
1378
1379         if (nic->device_type == XFRAME_II_DEVICE) {
1380                 val64 = STAT_BC(0x320);
1381                 writeq(val64, &bar0->stat_byte_cnt);
1382         }
1383
1384         /*
1385          * Initializing the sampling rate for the device to calculate the
1386          * bandwidth utilization.
1387          */
1388         val64 = MAC_TX_LINK_UTIL_VAL(tmac_util_period) |
1389             MAC_RX_LINK_UTIL_VAL(rmac_util_period);
1390         writeq(val64, &bar0->mac_link_util);
1391
1392
1393         /*
1394          * Initializing the Transmit and Receive Traffic Interrupt
1395          * Scheme.
1396          */
1397         /*
1398          * TTI Initialization. Default Tx timer gets us about
1399          * 250 interrupts per sec. Continuous interrupts are enabled
1400          * by default.
1401          */
1402         if (nic->device_type == XFRAME_II_DEVICE) {
1403                 int count = (nic->config.bus_speed * 125)/2;
1404                 val64 = TTI_DATA1_MEM_TX_TIMER_VAL(count);
1405         } else {
1406
1407                 val64 = TTI_DATA1_MEM_TX_TIMER_VAL(0x2078);
1408         }
1409         val64 |= TTI_DATA1_MEM_TX_URNG_A(0xA) |
1410             TTI_DATA1_MEM_TX_URNG_B(0x10) |
1411             TTI_DATA1_MEM_TX_URNG_C(0x30) | TTI_DATA1_MEM_TX_TIMER_AC_EN;
1412                 if (use_continuous_tx_intrs)
1413                         val64 |= TTI_DATA1_MEM_TX_TIMER_CI_EN;
1414         writeq(val64, &bar0->tti_data1_mem);
1415
1416         val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
1417             TTI_DATA2_MEM_TX_UFC_B(0x20) |
1418             TTI_DATA2_MEM_TX_UFC_C(0x40) | TTI_DATA2_MEM_TX_UFC_D(0x80);
1419         writeq(val64, &bar0->tti_data2_mem);
1420
1421         val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD;
1422         writeq(val64, &bar0->tti_command_mem);
1423
1424         /*
1425          * Once the operation completes, the Strobe bit of the command
1426          * register will be reset. We poll for this particular condition
1427          * We wait for a maximum of 500ms for the operation to complete,
1428          * if it's not complete by then we return error.
1429          */
1430         time = 0;
1431         while (TRUE) {
1432                 val64 = readq(&bar0->tti_command_mem);
1433                 if (!(val64 & TTI_CMD_MEM_STROBE_NEW_CMD)) {
1434                         break;
1435                 }
1436                 if (time > 10) {
1437                         DBG_PRINT(ERR_DBG, "%s: TTI init Failed\n",
1438                                   dev->name);
1439                         return -1;
1440                 }
1441                 msleep(50);
1442                 time++;
1443         }
1444
1445         if (nic->config.bimodal) {
1446                 int k = 0;
1447                 for (k = 0; k < config->rx_ring_num; k++) {
1448                         val64 = TTI_CMD_MEM_WE | TTI_CMD_MEM_STROBE_NEW_CMD;
1449                         val64 |= TTI_CMD_MEM_OFFSET(0x38+k);
1450                         writeq(val64, &bar0->tti_command_mem);
1451
1452                 /*
1453                  * Once the operation completes, the Strobe bit of the command
1454                  * register will be reset. We poll for this particular condition
1455                  * We wait for a maximum of 500ms for the operation to complete,
1456                  * if it's not complete by then we return error.
1457                 */
1458                         time = 0;
1459                         while (TRUE) {
1460                                 val64 = readq(&bar0->tti_command_mem);
1461                                 if (!(val64 & TTI_CMD_MEM_STROBE_NEW_CMD)) {
1462                                         break;
1463                                 }
1464                                 if (time > 10) {
1465                                         DBG_PRINT(ERR_DBG,
1466                                                 "%s: TTI init Failed\n",
1467                                         dev->name);
1468                                         return -1;
1469                                 }
1470                                 time++;
1471                                 msleep(50);
1472                         }
1473                 }
1474         } else {
1475
1476                 /* RTI Initialization */
1477                 if (nic->device_type == XFRAME_II_DEVICE) {
1478                         /*
1479                          * Programmed to generate Apprx 500 Intrs per
1480                          * second
1481                          */
1482                         int count = (nic->config.bus_speed * 125)/4;
1483                         val64 = RTI_DATA1_MEM_RX_TIMER_VAL(count);
1484                 } else {
1485                         val64 = RTI_DATA1_MEM_RX_TIMER_VAL(0xFFF);
1486                 }
1487                 val64 |= RTI_DATA1_MEM_RX_URNG_A(0xA) |
1488                     RTI_DATA1_MEM_RX_URNG_B(0x10) |
1489                     RTI_DATA1_MEM_RX_URNG_C(0x30) | RTI_DATA1_MEM_RX_TIMER_AC_EN;
1490
1491                 writeq(val64, &bar0->rti_data1_mem);
1492
1493                 val64 = RTI_DATA2_MEM_RX_UFC_A(0x1) |
1494                     RTI_DATA2_MEM_RX_UFC_B(0x2) ;
1495                 if (nic->intr_type == MSI_X)
1496                     val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x20) | \
1497                                 RTI_DATA2_MEM_RX_UFC_D(0x40));
1498                 else
1499                     val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x40) | \
1500                                 RTI_DATA2_MEM_RX_UFC_D(0x80));
1501                 writeq(val64, &bar0->rti_data2_mem);
1502
1503                 for (i = 0; i < config->rx_ring_num; i++) {
1504                         val64 = RTI_CMD_MEM_WE | RTI_CMD_MEM_STROBE_NEW_CMD
1505                                         | RTI_CMD_MEM_OFFSET(i);
1506                         writeq(val64, &bar0->rti_command_mem);
1507
1508                         /*
1509                          * Once the operation completes, the Strobe bit of the
1510                          * command register will be reset. We poll for this
1511                          * particular condition. We wait for a maximum of 500ms
1512                          * for the operation to complete, if it's not complete
1513                          * by then we return error.
1514                          */
1515                         time = 0;
1516                         while (TRUE) {
1517                                 val64 = readq(&bar0->rti_command_mem);
1518                                 if (!(val64 & RTI_CMD_MEM_STROBE_NEW_CMD)) {
1519                                         break;
1520                                 }
1521                                 if (time > 10) {
1522                                         DBG_PRINT(ERR_DBG, "%s: RTI init Failed\n",
1523                                                   dev->name);
1524                                         return -1;
1525                                 }
1526                                 time++;
1527                                 msleep(50);
1528                         }
1529                 }
1530         }
1531
1532         /*
1533          * Initializing proper values as Pause threshold into all
1534          * the 8 Queues on Rx side.
1535          */
1536         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q0q3);
1537         writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q4q7);
1538
1539         /* Disable RMAC PAD STRIPPING */
1540         add = &bar0->mac_cfg;
1541         val64 = readq(&bar0->mac_cfg);
1542         val64 &= ~(MAC_CFG_RMAC_STRIP_PAD);
1543         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1544         writel((u32) (val64), add);
1545         writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1546         writel((u32) (val64 >> 32), (add + 4));
1547         val64 = readq(&bar0->mac_cfg);
1548
1549         /* Enable FCS stripping by adapter */
1550         add = &bar0->mac_cfg;
1551         val64 = readq(&bar0->mac_cfg);
1552         val64 |= MAC_CFG_RMAC_STRIP_FCS;
1553         if (nic->device_type == XFRAME_II_DEVICE)
1554                 writeq(val64, &bar0->mac_cfg);
1555         else {
1556                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1557                 writel((u32) (val64), add);
1558                 writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
1559                 writel((u32) (val64 >> 32), (add + 4));
1560         }
1561
1562         /*
1563          * Set the time value to be inserted in the pause frame
1564          * generated by xena.
1565          */
1566         val64 = readq(&bar0->rmac_pause_cfg);
1567         val64 &= ~(RMAC_PAUSE_HG_PTIME(0xffff));
1568         val64 |= RMAC_PAUSE_HG_PTIME(nic->mac_control.rmac_pause_time);
1569         writeq(val64, &bar0->rmac_pause_cfg);
1570
1571         /*
1572          * Set the Threshold Limit for Generating the pause frame
1573          * If the amount of data in any Queue exceeds ratio of
1574          * (mac_control.mc_pause_threshold_q0q3 or q4q7)/256
1575          * pause frame is generated
1576          */
1577         val64 = 0;
1578         for (i = 0; i < 4; i++) {
1579                 val64 |=
1580                     (((u64) 0xFF00 | nic->mac_control.
1581                       mc_pause_threshold_q0q3)
1582                      << (i * 2 * 8));
1583         }
1584         writeq(val64, &bar0->mc_pause_thresh_q0q3);
1585
1586         val64 = 0;
1587         for (i = 0; i < 4; i++) {
1588                 val64 |=
1589                     (((u64) 0xFF00 | nic->mac_control.
1590                       mc_pause_threshold_q4q7)
1591                      << (i * 2 * 8));
1592         }
1593         writeq(val64, &bar0->mc_pause_thresh_q4q7);
1594
1595         /*
1596          * TxDMA will stop Read request if the number of read split has
1597          * exceeded the limit pointed by shared_splits
1598          */
1599         val64 = readq(&bar0->pic_control);
1600         val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
1601         writeq(val64, &bar0->pic_control);
1602
1603         if (nic->config.bus_speed == 266) {
1604                 writeq(TXREQTO_VAL(0x7f) | TXREQTO_EN, &bar0->txreqtimeout);
1605                 writeq(0x0, &bar0->read_retry_delay);
1606                 writeq(0x0, &bar0->write_retry_delay);
1607         }
1608
1609         /*
1610          * Programming the Herc to split every write transaction
1611          * that does not start on an ADB to reduce disconnects.
1612          */
1613         if (nic->device_type == XFRAME_II_DEVICE) {
1614                 val64 = FAULT_BEHAVIOUR | EXT_REQ_EN |
1615                         MISC_LINK_STABILITY_PRD(3);
1616                 writeq(val64, &bar0->misc_control);
1617                 val64 = readq(&bar0->pic_control2);
1618                 val64 &= ~(BIT(13)|BIT(14)|BIT(15));
1619                 writeq(val64, &bar0->pic_control2);
1620         }
1621         if (strstr(nic->product_name, "CX4")) {
1622                 val64 = TMAC_AVG_IPG(0x17);
1623                 writeq(val64, &bar0->tmac_avg_ipg);
1624         }
1625
1626         return SUCCESS;
1627 }
1628 #define LINK_UP_DOWN_INTERRUPT          1
1629 #define MAC_RMAC_ERR_TIMER              2
1630
1631 static int s2io_link_fault_indication(nic_t *nic)
1632 {
1633         if (nic->intr_type != INTA)
1634                 return MAC_RMAC_ERR_TIMER;
1635         if (nic->device_type == XFRAME_II_DEVICE)
1636                 return LINK_UP_DOWN_INTERRUPT;
1637         else
1638                 return MAC_RMAC_ERR_TIMER;
1639 }
1640
1641 /**
1642  *  en_dis_able_nic_intrs - Enable or Disable the interrupts
1643  *  @nic: device private variable,
1644  *  @mask: A mask indicating which Intr block must be modified and,
1645  *  @flag: A flag indicating whether to enable or disable the Intrs.
1646  *  Description: This function will either disable or enable the interrupts
1647  *  depending on the flag argument. The mask argument can be used to
1648  *  enable/disable any Intr block.
1649  *  Return Value: NONE.
1650  */
1651
1652 static void en_dis_able_nic_intrs(struct s2io_nic *nic, u16 mask, int flag)
1653 {
1654         XENA_dev_config_t __iomem *bar0 = nic->bar0;
1655         register u64 val64 = 0, temp64 = 0;
1656
1657         /*  Top level interrupt classification */
1658         /*  PIC Interrupts */
1659         if ((mask & (TX_PIC_INTR | RX_PIC_INTR))) {
1660                 /*  Enable PIC Intrs in the general intr mask register */
1661                 val64 = TXPIC_INT_M | PIC_RX_INT_M;
1662                 if (flag == ENABLE_INTRS) {
1663                         temp64 = readq(&bar0->general_int_mask);
1664                         temp64 &= ~((u64) val64);
1665                         writeq(temp64, &bar0->general_int_mask);
1666                         /*
1667                          * If Hercules adapter enable GPIO otherwise
1668                          * disable all PCIX, Flash, MDIO, IIC and GPIO
1669                          * interrupts for now.
1670                          * TODO
1671                          */
1672                         if (s2io_link_fault_indication(nic) ==
1673                                         LINK_UP_DOWN_INTERRUPT ) {
1674                                 temp64 = readq(&bar0->pic_int_mask);
1675                                 temp64 &= ~((u64) PIC_INT_GPIO);
1676                                 writeq(temp64, &bar0->pic_int_mask);
1677                                 temp64 = readq(&bar0->gpio_int_mask);
1678                                 temp64 &= ~((u64) GPIO_INT_MASK_LINK_UP);
1679                                 writeq(temp64, &bar0->gpio_int_mask);
1680                         } else {
1681                                 writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
1682                         }
1683                         /*
1684                          * No MSI Support is available presently, so TTI and
1685                          * RTI interrupts are also disabled.
1686                          */
1687                 } else if (flag == DISABLE_INTRS) {
1688                         /*
1689                          * Disable PIC Intrs in the general
1690                          * intr mask register
1691                          */
1692                         writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
1693                         temp64 = readq(&bar0->general_int_mask);
1694                         val64 |= temp64;
1695                         writeq(val64, &bar0->general_int_mask);
1696                 }
1697         }
1698
1699         /*  DMA Interrupts */
1700         /*  Enabling/Disabling Tx DMA interrupts */
1701         if (mask & TX_DMA_INTR) {
1702                 /* Enable TxDMA Intrs in the general intr mask register */
1703                 val64 = TXDMA_INT_M;
1704                 if (flag == ENABLE_INTRS) {
1705                         temp64 = readq(&bar0->general_int_mask);
1706                         temp64 &= ~((u64) val64);
1707                         writeq(temp64, &bar0->general_int_mask);
1708                         /*
1709                          * Keep all interrupts other than PFC interrupt
1710                          * and PCC interrupt disabled in DMA level.
1711                          */
1712                         val64 = DISABLE_ALL_INTRS & ~(TXDMA_PFC_INT_M |
1713                                                       TXDMA_PCC_INT_M);
1714                         writeq(val64, &bar0->txdma_int_mask);
1715                         /*
1716                          * Enable only the MISC error 1 interrupt in PFC block
1717                          */
1718                         val64 = DISABLE_ALL_INTRS & (~PFC_MISC_ERR_1);
1719                         writeq(val64, &bar0->pfc_err_mask);
1720                         /*
1721                          * Enable only the FB_ECC error interrupt in PCC block
1722                          */
1723                         val64 = DISABLE_ALL_INTRS & (~PCC_FB_ECC_ERR);
1724                         writeq(val64, &bar0->pcc_err_mask);
1725                 } else if (flag == DISABLE_INTRS) {
1726                         /*
1727                          * Disable TxDMA Intrs in the general intr mask
1728                          * register
1729                          */
1730                         writeq(DISABLE_ALL_INTRS, &bar0->txdma_int_mask);
1731                         writeq(DISABLE_ALL_INTRS, &bar0->pfc_err_mask);
1732                         temp64 = readq(&bar0->general_int_mask);
1733                         val64 |= temp64;
1734                         writeq(val64, &bar0->general_int_mask);
1735                 }
1736         }
1737
1738         /*  Enabling/Disabling Rx DMA interrupts */
1739         if (mask & RX_DMA_INTR) {
1740                 /*  Enable RxDMA Intrs in the general intr mask register */
1741                 val64 = RXDMA_INT_M;
1742                 if (flag == ENABLE_INTRS) {
1743                         temp64 = readq(&bar0->general_int_mask);
1744                         temp64 &= ~((u64) val64);
1745                         writeq(temp64, &bar0->general_int_mask);
1746                         /*
1747                          * All RxDMA block interrupts are disabled for now
1748                          * TODO
1749                          */
1750                         writeq(DISABLE_ALL_INTRS, &bar0->rxdma_int_mask);
1751                 } else if (flag == DISABLE_INTRS) {
1752                         /*
1753                          * Disable RxDMA Intrs in the general intr mask
1754                          * register
1755                          */
1756                         writeq(DISABLE_ALL_INTRS, &bar0->rxdma_int_mask);
1757                         temp64 = readq(&bar0->general_int_mask);
1758                         val64 |= temp64;
1759                         writeq(val64, &bar0->general_int_mask);
1760                 }
1761         }
1762
1763         /*  MAC Interrupts */
1764         /*  Enabling/Disabling MAC interrupts */
1765         if (mask & (TX_MAC_INTR | RX_MAC_INTR)) {
1766                 val64 = TXMAC_INT_M | RXMAC_INT_M;
1767                 if (flag == ENABLE_INTRS) {
1768                         temp64 = readq(&bar0->general_int_mask);
1769                         temp64 &= ~((u64) val64);
1770                         writeq(temp64, &bar0->general_int_mask);
1771                         /*
1772                          * All MAC block error interrupts are disabled for now
1773                          * TODO
1774                          */
1775                 } else if (flag == DISABLE_INTRS) {
1776                         /*
1777                          * Disable MAC Intrs in the general intr mask register
1778                          */
1779                         writeq(DISABLE_ALL_INTRS, &bar0->mac_int_mask);
1780                         writeq(DISABLE_ALL_INTRS,
1781                                &bar0->mac_rmac_err_mask);
1782
1783                         temp64 = readq(&bar0->general_int_mask);
1784                         val64 |= temp64;
1785                         writeq(val64, &bar0->general_int_mask);
1786                 }
1787         }
1788
1789         /*  XGXS Interrupts */
1790         if (mask & (TX_XGXS_INTR | RX_XGXS_INTR)) {
1791                 val64 = TXXGXS_INT_M | RXXGXS_INT_M;
1792                 if (flag == ENABLE_INTRS) {
1793                         temp64 = readq(&bar0->general_int_mask);
1794                         temp64 &= ~((u64) val64);
1795                         writeq(temp64, &bar0->general_int_mask);
1796                         /*
1797                          * All XGXS block error interrupts are disabled for now
1798                          * TODO
1799                          */
1800                         writeq(DISABLE_ALL_INTRS, &bar0->xgxs_int_mask);
1801                 } else if (flag == DISABLE_INTRS) {
1802                         /*
1803                          * Disable MC Intrs in the general intr mask register
1804                          */
1805                         writeq(DISABLE_ALL_INTRS, &bar0->xgxs_int_mask);
1806                         temp64 = readq(&bar0->general_int_mask);
1807                         val64 |= temp64;
1808                         writeq(val64, &bar0->general_int_mask);
1809                 }
1810         }
1811
1812         /*  Memory Controller(MC) interrupts */
1813         if (mask & MC_INTR) {
1814                 val64 = MC_INT_M;
1815                 if (flag == ENABLE_INTRS) {
1816                         temp64 = readq(&bar0->general_int_mask);
1817                         temp64 &= ~((u64) val64);
1818                         writeq(temp64, &bar0->general_int_mask);
1819                         /*
1820                          * Enable all MC Intrs.
1821                          */
1822                         writeq(0x0, &bar0->mc_int_mask);
1823                         writeq(0x0, &bar0->mc_err_mask);
1824                 } else if (flag == DISABLE_INTRS) {
1825                         /*
1826                          * Disable MC Intrs in the general intr mask register
1827                          */
1828                         writeq(DISABLE_ALL_INTRS, &bar0->mc_int_mask);
1829                         temp64 = readq(&bar0->general_int_mask);
1830                         val64 |= temp64;
1831                         writeq(val64, &bar0->general_int_mask);
1832                 }
1833         }
1834
1835
1836         /*  Tx traffic interrupts */
1837         if (mask & TX_TRAFFIC_INTR) {
1838                 val64 = TXTRAFFIC_INT_M;
1839                 if (flag == ENABLE_INTRS) {
1840                         temp64 = readq(&bar0->general_int_mask);
1841                         temp64 &= ~((u64) val64);
1842                         writeq(temp64, &bar0->general_int_mask);
1843                         /*
1844                          * Enable all the Tx side interrupts
1845                          * writing 0 Enables all 64 TX interrupt levels
1846                          */
1847                         writeq(0x0, &bar0->tx_traffic_mask);
1848                 } else if (flag == DISABLE_INTRS) {
1849                         /*
1850                          * Disable Tx Traffic Intrs in the general intr mask
1851                          * register.
1852                          */
1853                         writeq(DISABLE_ALL_INTRS, &bar0->tx_traffic_mask);
1854                         temp64 = readq(&bar0->general_int_mask);
1855                         val64 |= temp64;
1856                         writeq(val64, &bar0->general_int_mask);
1857                 }
1858         }
1859
1860         /*  Rx traffic interrupts */
1861         if (mask & RX_TRAFFIC_INTR) {
1862                 val64 = RXTRAFFIC_INT_M;
1863                 if (flag == ENABLE_INTRS) {
1864                         temp64 = readq(&bar0->general_int_mask);
1865                         temp64 &= ~((u64) val64);
1866                         writeq(temp64, &bar0->general_int_mask);
1867                         /* writing 0 Enables all 8 RX interrupt levels */
1868                         writeq(0x0, &bar0->rx_traffic_mask);
1869                 } else if (flag == DISABLE_INTRS) {
1870                         /*
1871                          * Disable Rx Traffic Intrs in the general intr mask
1872                          * register.
1873                          */
1874                         writeq(DISABLE_ALL_INTRS, &bar0->rx_traffic_mask);
1875                         temp64 = readq(&bar0->general_int_mask);
1876                         val64 |= temp64;
1877                         writeq(val64, &bar0->general_int_mask);
1878                 }
1879         }
1880 }
1881
1882 /**
1883  *  verify_pcc_quiescent- Checks for PCC quiescent state
1884  *  Return: 1 If PCC is quiescence
1885  *          0 If PCC is not quiescence
1886  */
1887 static int verify_pcc_quiescent(nic_t *sp, int flag)
1888 {
1889         int ret = 0, herc;
1890         XENA_dev_config_t __iomem *bar0 = sp->bar0;
1891         u64 val64 = readq(&bar0->adapter_status);
1892
1893         herc = (sp->device_type == XFRAME_II_DEVICE);
1894
1895         if (flag == FALSE) {
1896                 if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
1897                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_IDLE))
1898                                 ret = 1;
1899                 } else {
1900                         if (!(val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
1901                                 ret = 1;
1902                 }
1903         } else {
1904                 if ((!herc && (get_xena_rev_id(sp->pdev) >= 4)) || herc) {
1905                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_IDLE) ==
1906                              ADAPTER_STATUS_RMAC_PCC_IDLE))
1907                                 ret = 1;
1908                 } else {
1909                         if (((val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE) ==
1910                              ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
1911                                 ret = 1;
1912                 }
1913         }
1914
1915         return ret;
1916 }
1917 /**
1918  *  verify_xena_quiescence - Checks whether the H/W is ready
1919  *  Description: Returns whether the H/W is ready to go or not. Depending
1920  *  on whether adapter enable bit was written or not the comparison
1921  *  differs and the calling function passes the input argument flag to
1922  *  indicate this.
1923  *  Return: 1 If xena is quiescence
1924  *          0 If Xena is not quiescence
1925  */
1926
1927 static int verify_xena_quiescence(nic_t *sp)
1928 {
1929         int  mode;
1930         XENA_dev_config_t __iomem *bar0 = sp->bar0;
1931         u64 val64 = readq(&bar0->adapter_status);
1932         mode = s2io_verify_pci_mode(sp);
1933
1934         if (!(val64 & ADAPTER_STATUS_TDMA_READY)) {
1935                 DBG_PRINT(ERR_DBG, "%s", "TDMA is not ready!");
1936                 return 0;
1937         }
1938         if (!(val64 & ADAPTER_STATUS_RDMA_READY)) {
1939         DBG_PRINT(ERR_DBG, "%s", "RDMA is not ready!");
1940                 return 0;
1941         }
1942         if (!(val64 & ADAPTER_STATUS_PFC_READY)) {
1943                 DBG_PRINT(ERR_DBG, "%s", "PFC is not ready!");
1944                 return 0;
1945         }
1946         if (!(val64 & ADAPTER_STATUS_TMAC_BUF_EMPTY)) {
1947                 DBG_PRINT(ERR_DBG, "%s", "TMAC BUF is not empty!");
1948                 return 0;
1949         }
1950         if (!(val64 & ADAPTER_STATUS_PIC_QUIESCENT)) {
1951                 DBG_PRINT(ERR_DBG, "%s", "PIC is not QUIESCENT!");
1952                 return 0;
1953         }
1954         if (!(val64 & ADAPTER_STATUS_MC_DRAM_READY)) {
1955                 DBG_PRINT(ERR_DBG, "%s", "MC_DRAM is not ready!");
1956                 return 0;
1957         }
1958         if (!(val64 & ADAPTER_STATUS_MC_QUEUES_READY)) {
1959                 DBG_PRINT(ERR_DBG, "%s", "MC_QUEUES is not ready!");
1960                 return 0;
1961         }
1962         if (!(val64 & ADAPTER_STATUS_M_PLL_LOCK)) {
1963                 DBG_PRINT(ERR_DBG, "%s", "M_PLL is not locked!");
1964                 return 0;
1965         }
1966
1967         /*
1968          * In PCI 33 mode, the P_PLL is not used, and therefore,
1969          * the the P_PLL_LOCK bit in the adapter_status register will
1970          * not be asserted.
1971          */
1972         if (!(val64 & ADAPTER_STATUS_P_PLL_LOCK) &&
1973                 sp->device_type == XFRAME_II_DEVICE && mode !=
1974                 PCI_MODE_PCI_33) {
1975                 DBG_PRINT(ERR_DBG, "%s", "P_PLL is not locked!");
1976                 return 0;
1977         }
1978         if (!((val64 & ADAPTER_STATUS_RC_PRC_QUIESCENT) ==
1979                         ADAPTER_STATUS_RC_PRC_QUIESCENT)) {
1980                 DBG_PRINT(ERR_DBG, "%s", "RC_PRC is not QUIESCENT!");
1981                 return 0;
1982         }
1983         return 1;
1984 }
1985
1986 /**
1987  * fix_mac_address -  Fix for Mac addr problem on Alpha platforms
1988  * @sp: Pointer to device specifc structure
1989  * Description :
1990  * New procedure to clear mac address reading  problems on Alpha platforms
1991  *
1992  */
1993
1994 static void fix_mac_address(nic_t * sp)
1995 {
1996         XENA_dev_config_t __iomem *bar0 = sp->bar0;
1997         u64 val64;
1998         int i = 0;
1999
2000         while (fix_mac[i] != END_SIGN) {
2001                 writeq(fix_mac[i++], &bar0->gpio_control);
2002                 udelay(10);
2003                 val64 = readq(&bar0->gpio_control);
2004         }
2005 }
2006
2007 /**
2008  *  start_nic - Turns the device on
2009  *  @nic : device private variable.
2010  *  Description:
2011  *  This function actually turns the device on. Before this  function is
2012  *  called,all Registers are configured from their reset states
2013  *  and shared memory is allocated but the NIC is still quiescent. On
2014  *  calling this function, the device interrupts are cleared and the NIC is
2015  *  literally switched on by writing into the adapter control register.
2016  *  Return Value:
2017  *  SUCCESS on success and -1 on failure.
2018  */
2019
2020 static int start_nic(struct s2io_nic *nic)
2021 {
2022         XENA_dev_config_t __iomem *bar0 = nic->bar0;
2023         struct net_device *dev = nic->dev;
2024         register u64 val64 = 0;
2025         u16 subid, i;
2026         mac_info_t *mac_control;
2027         struct config_param *config;
2028
2029         mac_control = &nic->mac_control;
2030         config = &nic->config;
2031
2032         /*  PRC Initialization and configuration */
2033         for (i = 0; i < config->rx_ring_num; i++) {
2034                 writeq((u64) mac_control->rings[i].rx_blocks[0].block_dma_addr,
2035                        &bar0->prc_rxd0_n[i]);
2036
2037                 val64 = readq(&bar0->prc_ctrl_n[i]);
2038                 if (nic->config.bimodal)
2039                         val64 |= PRC_CTRL_BIMODAL_INTERRUPT;
2040                 if (nic->rxd_mode == RXD_MODE_1)
2041                         val64 |= PRC_CTRL_RC_ENABLED;
2042                 else
2043                         val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
2044                 if (nic->device_type == XFRAME_II_DEVICE)
2045                         val64 |= PRC_CTRL_GROUP_READS;
2046                 val64 &= ~PRC_CTRL_RXD_BACKOFF_INTERVAL(0xFFFFFF);
2047                 val64 |= PRC_CTRL_RXD_BACKOFF_INTERVAL(0x1000);
2048                 writeq(val64, &bar0->prc_ctrl_n[i]);
2049         }
2050
2051         if (nic->rxd_mode == RXD_MODE_3B) {
2052                 /* Enabling 2 buffer mode by writing into Rx_pa_cfg reg. */
2053                 val64 = readq(&bar0->rx_pa_cfg);
2054                 val64 |= RX_PA_CFG_IGNORE_L2_ERR;
2055                 writeq(val64, &bar0->rx_pa_cfg);
2056         }
2057
2058         /*
2059          * Enabling MC-RLDRAM. After enabling the device, we timeout
2060          * for around 100ms, which is approximately the time required
2061          * for the device to be ready for operation.
2062          */
2063         val64 = readq(&bar0->mc_rldram_mrs);
2064         val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE | MC_RLDRAM_MRS_ENABLE;
2065         SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
2066         val64 = readq(&bar0->mc_rldram_mrs);
2067
2068         msleep(100);    /* Delay by around 100 ms. */
2069
2070         /* Enabling ECC Protection. */
2071         val64 = readq(&bar0->adapter_control);
2072         val64 &= ~ADAPTER_ECC_EN;
2073         writeq(val64, &bar0->adapter_control);
2074
2075         /*
2076          * Clearing any possible Link state change interrupts that
2077          * could have popped up just before Enabling the card.
2078          */
2079         val64 = readq(&bar0->mac_rmac_err_reg);
2080         if (val64)
2081                 writeq(val64, &bar0->mac_rmac_err_reg);
2082
2083         /*
2084          * Verify if the device is ready to be enabled, if so enable
2085          * it.
2086          */
2087         val64 = readq(&bar0->adapter_status);
2088         if (!verify_xena_quiescence(nic)) {
2089                 DBG_PRINT(ERR_DBG, "%s: device is not ready, ", dev->name);
2090                 DBG_PRINT(ERR_DBG, "Adapter status reads: 0x%llx\n",
2091                           (unsigned long long) val64);
2092                 return FAILURE;
2093         }
2094
2095         /*
2096          * With some switches, link might be already up at this point.
2097          * Because of this weird behavior, when we enable laser,
2098          * we may not get link. We need to handle this. We cannot
2099          * figure out which switch is misbehaving. So we are forced to
2100          * make a global change.
2101          */
2102
2103         /* Enabling Laser. */
2104         val64 = readq(&bar0->adapter_control);
2105         val64 |= ADAPTER_EOI_TX_ON;
2106         writeq(val64, &bar0->adapter_control);
2107
2108         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
2109                 /*
2110                  * Dont see link state interrupts initally on some switches,
2111                  * so directly scheduling the link state task here.
2112                  */
2113                 schedule_work(&nic->set_link_task);
2114         }
2115         /* SXE-002: Initialize link and activity LED */
2116         subid = nic->pdev->subsystem_device;
2117         if (((subid & 0xFF) >= 0x07) &&
2118             (nic->device_type == XFRAME_I_DEVICE)) {
2119                 val64 = readq(&bar0->gpio_control);
2120                 val64 |= 0x0000800000000000ULL;
2121                 writeq(val64, &bar0->gpio_control);
2122                 val64 = 0x0411040400000000ULL;
2123                 writeq(val64, (void __iomem *)bar0 + 0x2700);
2124         }
2125
2126         return SUCCESS;
2127 }
2128 /**
2129  * s2io_txdl_getskb - Get the skb from txdl, unmap and return skb
2130  */
2131 static struct sk_buff *s2io_txdl_getskb(fifo_info_t *fifo_data, TxD_t *txdlp, int get_off)
2132 {
2133         nic_t *nic = fifo_data->nic;
2134         struct sk_buff *skb;
2135         TxD_t *txds;
2136         u16 j, frg_cnt;
2137
2138         txds = txdlp;
2139         if (txds->Host_Control == (u64)(long)nic->ufo_in_band_v) {
2140                 pci_unmap_single(nic->pdev, (dma_addr_t)
2141                         txds->Buffer_Pointer, sizeof(u64),
2142                         PCI_DMA_TODEVICE);
2143                 txds++;
2144         }
2145
2146         skb = (struct sk_buff *) ((unsigned long)
2147                         txds->Host_Control);
2148         if (!skb) {
2149                 memset(txdlp, 0, (sizeof(TxD_t) * fifo_data->max_txds));
2150                 return NULL;
2151         }
2152         pci_unmap_single(nic->pdev, (dma_addr_t)
2153                          txds->Buffer_Pointer,
2154                          skb->len - skb->data_len,
2155                          PCI_DMA_TODEVICE);
2156         frg_cnt = skb_shinfo(skb)->nr_frags;
2157         if (frg_cnt) {
2158                 txds++;
2159                 for (j = 0; j < frg_cnt; j++, txds++) {
2160                         skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
2161                         if (!txds->Buffer_Pointer)
2162                                 break;
2163                         pci_unmap_page(nic->pdev, (dma_addr_t)
2164                                         txds->Buffer_Pointer,
2165                                        frag->size, PCI_DMA_TODEVICE);
2166                 }
2167         }
2168         memset(txdlp,0, (sizeof(TxD_t) * fifo_data->max_txds));
2169         return(skb);
2170 }
2171
2172 /**
2173  *  free_tx_buffers - Free all queued Tx buffers
2174  *  @nic : device private variable.
2175  *  Description:
2176  *  Free all queued Tx buffers.
2177  *  Return Value: void
2178 */
2179
2180 static void free_tx_buffers(struct s2io_nic *nic)
2181 {
2182         struct net_device *dev = nic->dev;
2183         struct sk_buff *skb;
2184         TxD_t *txdp;
2185         int i, j;
2186         mac_info_t *mac_control;
2187         struct config_param *config;
2188         int cnt = 0;
2189
2190         mac_control = &nic->mac_control;
2191         config = &nic->config;
2192
2193         for (i = 0; i < config->tx_fifo_num; i++) {
2194                 for (j = 0; j < config->tx_cfg[i].fifo_len - 1; j++) {
2195                         txdp = (TxD_t *) mac_control->fifos[i].list_info[j].
2196                             list_virt_addr;
2197                         skb = s2io_txdl_getskb(&mac_control->fifos[i], txdp, j);
2198                         if (skb) {
2199                                 dev_kfree_skb(skb);
2200                                 cnt++;
2201                         }
2202                 }
2203                 DBG_PRINT(INTR_DBG,
2204                           "%s:forcibly freeing %d skbs on FIFO%d\n",
2205                           dev->name, cnt, i);
2206                 mac_control->fifos[i].tx_curr_get_info.offset = 0;
2207                 mac_control->fifos[i].tx_curr_put_info.offset = 0;
2208         }
2209 }
2210
2211 /**
2212  *   stop_nic -  To stop the nic
2213  *   @nic ; device private variable.
2214  *   Description:
2215  *   This function does exactly the opposite of what the start_nic()
2216  *   function does. This function is called to stop the device.
2217  *   Return Value:
2218  *   void.
2219  */
2220
2221 static void stop_nic(struct s2io_nic *nic)
2222 {
2223         XENA_dev_config_t __iomem *bar0 = nic->bar0;
2224         register u64 val64 = 0;
2225         u16 interruptible;
2226         mac_info_t *mac_control;
2227         struct config_param *config;
2228
2229         mac_control = &nic->mac_control;
2230         config = &nic->config;
2231
2232         /*  Disable all interrupts */
2233         interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
2234         interruptible |= TX_PIC_INTR | RX_PIC_INTR;
2235         interruptible |= TX_MAC_INTR | RX_MAC_INTR;
2236         en_dis_able_nic_intrs(nic, interruptible, DISABLE_INTRS);
2237
2238         /* Clearing Adapter_En bit of ADAPTER_CONTROL Register */
2239         val64 = readq(&bar0->adapter_control);
2240         val64 &= ~(ADAPTER_CNTL_EN);
2241         writeq(val64, &bar0->adapter_control);
2242 }
2243
2244 static int fill_rxd_3buf(nic_t *nic, RxD_t *rxdp, struct sk_buff *skb)
2245 {
2246         struct net_device *dev = nic->dev;
2247         struct sk_buff *frag_list;
2248         void *tmp;
2249
2250         /* Buffer-1 receives L3/L4 headers */
2251         ((RxD3_t*)rxdp)->Buffer1_ptr = pci_map_single
2252                         (nic->pdev, skb->data, l3l4hdr_size + 4,
2253                         PCI_DMA_FROMDEVICE);
2254
2255         /* skb_shinfo(skb)->frag_list will have L4 data payload */
2256         skb_shinfo(skb)->frag_list = dev_alloc_skb(dev->mtu + ALIGN_SIZE);
2257         if (skb_shinfo(skb)->frag_list == NULL) {
2258                 DBG_PRINT(ERR_DBG, "%s: dev_alloc_skb failed\n ", dev->name);
2259                 return -ENOMEM ;
2260         }
2261         frag_list = skb_shinfo(skb)->frag_list;
2262         frag_list->next = NULL;
2263         tmp = (void *)ALIGN((long)frag_list->data, ALIGN_SIZE + 1);
2264         frag_list->data = tmp;
2265         frag_list->tail = tmp;
2266
2267         /* Buffer-2 receives L4 data payload */
2268         ((RxD3_t*)rxdp)->Buffer2_ptr = pci_map_single(nic->pdev,
2269                                 frag_list->data, dev->mtu,
2270                                 PCI_DMA_FROMDEVICE);
2271         rxdp->Control_2 |= SET_BUFFER1_SIZE_3(l3l4hdr_size + 4);
2272         rxdp->Control_2 |= SET_BUFFER2_SIZE_3(dev->mtu);
2273
2274         return SUCCESS;
2275 }
2276
2277 /**
2278  *  fill_rx_buffers - Allocates the Rx side skbs
2279  *  @nic:  device private variable
2280  *  @ring_no: ring number
2281  *  Description:
2282  *  The function allocates Rx side skbs and puts the physical
2283  *  address of these buffers into the RxD buffer pointers, so that the NIC
2284  *  can DMA the received frame into these locations.
2285  *  The NIC supports 3 receive modes, viz
2286  *  1. single buffer,
2287  *  2. three buffer and
2288  *  3. Five buffer modes.
2289  *  Each mode defines how many fragments the received frame will be split
2290  *  up into by the NIC. The frame is split into L3 header, L4 Header,
2291  *  L4 payload in three buffer mode and in 5 buffer mode, L4 payload itself
2292  *  is split into 3 fragments. As of now only single buffer mode is
2293  *  supported.
2294  *   Return Value:
2295  *  SUCCESS on success or an appropriate -ve value on failure.
2296  */
2297
2298 static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
2299 {
2300         struct net_device *dev = nic->dev;
2301         struct sk_buff *skb;
2302         RxD_t *rxdp;
2303         int off, off1, size, block_no, block_no1;
2304         u32 alloc_tab = 0;
2305         u32 alloc_cnt;
2306         mac_info_t *mac_control;
2307         struct config_param *config;
2308         u64 tmp;
2309         buffAdd_t *ba;
2310         unsigned long flags;
2311         RxD_t *first_rxdp = NULL;
2312
2313         mac_control = &nic->mac_control;
2314         config = &nic->config;
2315         alloc_cnt = mac_control->rings[ring_no].pkt_cnt -
2316             atomic_read(&nic->rx_bufs_left[ring_no]);
2317
2318         block_no1 = mac_control->rings[ring_no].rx_curr_get_info.block_index;
2319         off1 = mac_control->rings[ring_no].rx_curr_get_info.offset;
2320         while (alloc_tab < alloc_cnt) {
2321                 block_no = mac_control->rings[ring_no].rx_curr_put_info.
2322                     block_index;
2323                 off = mac_control->rings[ring_no].rx_curr_put_info.offset;
2324
2325                 rxdp = mac_control->rings[ring_no].
2326                                 rx_blocks[block_no].rxds[off].virt_addr;
2327
2328                 if ((block_no == block_no1) && (off == off1) &&
2329                                         (rxdp->Host_Control)) {
2330                         DBG_PRINT(INTR_DBG, "%s: Get and Put",
2331                                   dev->name);
2332                         DBG_PRINT(INTR_DBG, " info equated\n");
2333                         goto end;
2334                 }
2335                 if (off && (off == rxd_count[nic->rxd_mode])) {
2336                         mac_control->rings[ring_no].rx_curr_put_info.
2337                             block_index++;
2338                         if (mac_control->rings[ring_no].rx_curr_put_info.
2339                             block_index == mac_control->rings[ring_no].
2340                                         block_count)
2341                                 mac_control->rings[ring_no].rx_curr_put_info.
2342                                         block_index = 0;
2343                         block_no = mac_control->rings[ring_no].
2344                                         rx_curr_put_info.block_index;
2345                         if (off == rxd_count[nic->rxd_mode])
2346                                 off = 0;
2347                         mac_control->rings[ring_no].rx_curr_put_info.
2348                                 offset = off;
2349                         rxdp = mac_control->rings[ring_no].
2350                                 rx_blocks[block_no].block_virt_addr;
2351                         DBG_PRINT(INTR_DBG, "%s: Next block at: %p\n",
2352                                   dev->name, rxdp);
2353                 }
2354                 if(!napi) {
2355                         spin_lock_irqsave(&nic->put_lock, flags);
2356                         mac_control->rings[ring_no].put_pos =
2357                         (block_no * (rxd_count[nic->rxd_mode] + 1)) + off;
2358                         spin_unlock_irqrestore(&nic->put_lock, flags);
2359                 } else {
2360                         mac_control->rings[ring_no].put_pos =
2361                         (block_no * (rxd_count[nic->rxd_mode] + 1)) + off;
2362                 }
2363                 if ((rxdp->Control_1 & RXD_OWN_XENA) &&
2364                         ((nic->rxd_mode >= RXD_MODE_3A) &&
2365                                 (rxdp->Control_2 & BIT(0)))) {
2366                         mac_control->rings[ring_no].rx_curr_put_info.
2367                                         offset = off;
2368                         goto end;
2369                 }
2370                 /* calculate size of skb based on ring mode */
2371                 size = dev->mtu + HEADER_ETHERNET_II_802_3_SIZE +
2372                                 HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
2373                 if (nic->rxd_mode == RXD_MODE_1)
2374                         size += NET_IP_ALIGN;
2375                 else if (nic->rxd_mode == RXD_MODE_3B)
2376                         size = dev->mtu + ALIGN_SIZE + BUF0_LEN + 4;
2377                 else
2378                         size = l3l4hdr_size + ALIGN_SIZE + BUF0_LEN + 4;
2379
2380                 /* allocate skb */
2381                 skb = dev_alloc_skb(size);
2382                 if(!skb) {
2383                         DBG_PRINT(ERR_DBG, "%s: Out of ", dev->name);
2384                         DBG_PRINT(ERR_DBG, "memory to allocate SKBs\n");
2385                         if (first_rxdp) {
2386                                 wmb();
2387                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2388                         }
2389                         return -ENOMEM ;
2390                 }
2391                 if (nic->rxd_mode == RXD_MODE_1) {
2392                         /* 1 buffer mode - normal operation mode */
2393                         memset(rxdp, 0, sizeof(RxD1_t));
2394                         skb_reserve(skb, NET_IP_ALIGN);
2395                         ((RxD1_t*)rxdp)->Buffer0_ptr = pci_map_single
2396                             (nic->pdev, skb->data, size - NET_IP_ALIGN,
2397                                 PCI_DMA_FROMDEVICE);
2398                         rxdp->Control_2 = SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
2399
2400                 } else if (nic->rxd_mode >= RXD_MODE_3A) {
2401                         /*
2402                          * 2 or 3 buffer mode -
2403                          * Both 2 buffer mode and 3 buffer mode provides 128
2404                          * byte aligned receive buffers.
2405                          *
2406                          * 3 buffer mode provides header separation where in
2407                          * skb->data will have L3/L4 headers where as
2408                          * skb_shinfo(skb)->frag_list will have the L4 data
2409                          * payload
2410                          */
2411
2412                         memset(rxdp, 0, sizeof(RxD3_t));
2413                         ba = &mac_control->rings[ring_no].ba[block_no][off];
2414                         skb_reserve(skb, BUF0_LEN);
2415                         tmp = (u64)(unsigned long) skb->data;
2416                         tmp += ALIGN_SIZE;
2417                         tmp &= ~ALIGN_SIZE;
2418                         skb->data = (void *) (unsigned long)tmp;
2419                         skb->tail = (void *) (unsigned long)tmp;
2420
2421                         if (!(((RxD3_t*)rxdp)->Buffer0_ptr))
2422                                 ((RxD3_t*)rxdp)->Buffer0_ptr =
2423                                    pci_map_single(nic->pdev, ba->ba_0, BUF0_LEN,
2424                                            PCI_DMA_FROMDEVICE);
2425                         else
2426                                 pci_dma_sync_single_for_device(nic->pdev,
2427                                     (dma_addr_t) ((RxD3_t*)rxdp)->Buffer0_ptr,
2428                                     BUF0_LEN, PCI_DMA_FROMDEVICE);
2429                         rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
2430                         if (nic->rxd_mode == RXD_MODE_3B) {
2431                                 /* Two buffer mode */
2432
2433                                 /*
2434                                  * Buffer2 will have L3/L4 header plus
2435                                  * L4 payload
2436                                  */
2437                                 ((RxD3_t*)rxdp)->Buffer2_ptr = pci_map_single
2438                                 (nic->pdev, skb->data, dev->mtu + 4,
2439                                                 PCI_DMA_FROMDEVICE);
2440
2441                                 /* Buffer-1 will be dummy buffer. Not used */
2442                                 if (!(((RxD3_t*)rxdp)->Buffer1_ptr)) {
2443                                         ((RxD3_t*)rxdp)->Buffer1_ptr =
2444                                                 pci_map_single(nic->pdev,
2445                                                 ba->ba_1, BUF1_LEN,
2446                                                 PCI_DMA_FROMDEVICE);
2447                                 }
2448                                 rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
2449                                 rxdp->Control_2 |= SET_BUFFER2_SIZE_3
2450                                                                 (dev->mtu + 4);
2451                         } else {
2452                                 /* 3 buffer mode */
2453                                 if (fill_rxd_3buf(nic, rxdp, skb) == -ENOMEM) {
2454                                         dev_kfree_skb_irq(skb);
2455                                         if (first_rxdp) {
2456                                                 wmb();
2457                                                 first_rxdp->Control_1 |=
2458                                                         RXD_OWN_XENA;
2459                                         }
2460                                         return -ENOMEM ;
2461                                 }
2462                         }
2463                         rxdp->Control_2 |= BIT(0);
2464                 }
2465                 rxdp->Host_Control = (unsigned long) (skb);
2466                 if (alloc_tab & ((1 << rxsync_frequency) - 1))
2467                         rxdp->Control_1 |= RXD_OWN_XENA;
2468                 off++;
2469                 if (off == (rxd_count[nic->rxd_mode] + 1))
2470                         off = 0;
2471                 mac_control->rings[ring_no].rx_curr_put_info.offset = off;
2472
2473                 rxdp->Control_2 |= SET_RXD_MARKER;
2474                 if (!(alloc_tab & ((1 << rxsync_frequency) - 1))) {
2475                         if (first_rxdp) {
2476                                 wmb();
2477                                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2478                         }
2479                         first_rxdp = rxdp;
2480                 }
2481                 atomic_inc(&nic->rx_bufs_left[ring_no]);
2482                 alloc_tab++;
2483         }
2484
2485       end:
2486         /* Transfer ownership of first descriptor to adapter just before
2487          * exiting. Before that, use memory barrier so that ownership
2488          * and other fields are seen by adapter correctly.
2489          */
2490         if (first_rxdp) {
2491                 wmb();
2492                 first_rxdp->Control_1 |= RXD_OWN_XENA;
2493         }
2494
2495         return SUCCESS;
2496 }
2497
2498 static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk)
2499 {
2500         struct net_device *dev = sp->dev;
2501         int j;
2502         struct sk_buff *skb;
2503         RxD_t *rxdp;
2504         mac_info_t *mac_control;
2505         buffAdd_t *ba;
2506
2507         mac_control = &sp->mac_control;
2508         for (j = 0 ; j < rxd_count[sp->rxd_mode]; j++) {
2509                 rxdp = mac_control->rings[ring_no].
2510                                 rx_blocks[blk].rxds[j].virt_addr;
2511                 skb = (struct sk_buff *)
2512                         ((unsigned long) rxdp->Host_Control);
2513                 if (!skb) {
2514                         continue;
2515                 }
2516                 if (sp->rxd_mode == RXD_MODE_1) {
2517                         pci_unmap_single(sp->pdev, (dma_addr_t)
2518                                  ((RxD1_t*)rxdp)->Buffer0_ptr,
2519                                  dev->mtu +
2520                                  HEADER_ETHERNET_II_802_3_SIZE
2521                                  + HEADER_802_2_SIZE +
2522                                  HEADER_SNAP_SIZE,
2523                                  PCI_DMA_FROMDEVICE);
2524                         memset(rxdp, 0, sizeof(RxD1_t));
2525                 } else if(sp->rxd_mode == RXD_MODE_3B) {
2526                         ba = &mac_control->rings[ring_no].
2527                                 ba[blk][j];
2528                         pci_unmap_single(sp->pdev, (dma_addr_t)
2529                                  ((RxD3_t*)rxdp)->Buffer0_ptr,
2530                                  BUF0_LEN,
2531                                  PCI_DMA_FROMDEVICE);
2532                         pci_unmap_single(sp->pdev, (dma_addr_t)
2533                                  ((RxD3_t*)rxdp)->Buffer1_ptr,
2534                                  BUF1_LEN,
2535                                  PCI_DMA_FROMDEVICE);
2536                         pci_unmap_single(sp->pdev, (dma_addr_t)
2537                                  ((RxD3_t*)rxdp)->Buffer2_ptr,
2538                                  dev->mtu + 4,
2539                                  PCI_DMA_FROMDEVICE);
2540                         memset(rxdp, 0, sizeof(RxD3_t));
2541                 } else {
2542                         pci_unmap_single(sp->pdev, (dma_addr_t)
2543                                 ((RxD3_t*)rxdp)->Buffer0_ptr, BUF0_LEN,
2544                                 PCI_DMA_FROMDEVICE);
2545                         pci_unmap_single(sp->pdev, (dma_addr_t)
2546                                 ((RxD3_t*)rxdp)->Buffer1_ptr,
2547                                 l3l4hdr_size + 4,
2548                                 PCI_DMA_FROMDEVICE);
2549                         pci_unmap_single(sp->pdev, (dma_addr_t)
2550                                 ((RxD3_t*)rxdp)->Buffer2_ptr, dev->mtu,
2551                                 PCI_DMA_FROMDEVICE);
2552                         memset(rxdp, 0, sizeof(RxD3_t));
2553                 }
2554                 dev_kfree_skb(skb);
2555                 atomic_dec(&sp->rx_bufs_left[ring_no]);
2556         }
2557 }
2558
2559 /**
2560  *  free_rx_buffers - Frees all Rx buffers
2561  *  @sp: device private variable.
2562  *  Description:
2563  *  This function will free all Rx buffers allocated by host.
2564  *  Return Value:
2565  *  NONE.
2566  */
2567
2568 static void free_rx_buffers(struct s2io_nic *sp)
2569 {
2570         struct net_device *dev = sp->dev;
2571         int i, blk = 0, buf_cnt = 0;
2572         mac_info_t *mac_control;
2573         struct config_param *config;
2574
2575         mac_control = &sp->mac_control;
2576         config = &sp->config;
2577
2578         for (i = 0; i < config->rx_ring_num; i++) {
2579                 for (blk = 0; blk < rx_ring_sz[i]; blk++)
2580                         free_rxd_blk(sp,i,blk);
2581
2582                 mac_control->rings[i].rx_curr_put_info.block_index = 0;
2583                 mac_control->rings[i].rx_curr_get_info.block_index = 0;
2584                 mac_control->rings[i].rx_curr_put_info.offset = 0;
2585                 mac_control->rings[i].rx_curr_get_info.offset = 0;
2586                 atomic_set(&sp->rx_bufs_left[i], 0);
2587                 DBG_PRINT(INIT_DBG, "%s:Freed 0x%x Rx Buffers on ring%d\n",
2588                           dev->name, buf_cnt, i);
2589         }
2590 }
2591
2592 /**
2593  * s2io_poll - Rx interrupt handler for NAPI support
2594  * @dev : pointer to the device structure.
2595  * @budget : The number of packets that were budgeted to be processed
2596  * during  one pass through the 'Poll" function.
2597  * Description:
2598  * Comes into picture only if NAPI support has been incorporated. It does
2599  * the same thing that rx_intr_handler does, but not in a interrupt context
2600  * also It will process only a given number of packets.
2601  * Return value:
2602  * 0 on success and 1 if there are No Rx packets to be processed.
2603  */
2604
2605 static int s2io_poll(struct net_device *dev, int *budget)
2606 {
2607         nic_t *nic = dev->priv;
2608         int pkt_cnt = 0, org_pkts_to_process;
2609         mac_info_t *mac_control;
2610         struct config_param *config;
2611         XENA_dev_config_t __iomem *bar0 = nic->bar0;
2612         int i;
2613
2614         atomic_inc(&nic->isr_cnt);
2615         mac_control = &nic->mac_control;
2616         config = &nic->config;
2617
2618         nic->pkts_to_process = *budget;
2619         if (nic->pkts_to_process > dev->quota)
2620                 nic->pkts_to_process = dev->quota;
2621         org_pkts_to_process = nic->pkts_to_process;
2622
2623         writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
2624         readl(&bar0->rx_traffic_int);
2625
2626         for (i = 0; i < config->rx_ring_num; i++) {
2627                 rx_intr_handler(&mac_control->rings[i]);
2628                 pkt_cnt = org_pkts_to_process - nic->pkts_to_process;
2629                 if (!nic->pkts_to_process) {
2630                         /* Quota for the current iteration has been met */
2631                         goto no_rx;
2632                 }
2633         }
2634         if (!pkt_cnt)
2635                 pkt_cnt = 1;
2636
2637         dev->quota -= pkt_cnt;
2638         *budget -= pkt_cnt;
2639         netif_rx_complete(dev);
2640
2641         for (i = 0; i < config->rx_ring_num; i++) {
2642                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2643                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2644                         DBG_PRINT(ERR_DBG, " in Rx Poll!!\n");
2645                         break;
2646                 }
2647         }
2648         /* Re enable the Rx interrupts. */
2649         writeq(0x0, &bar0->rx_traffic_mask);
2650         readl(&bar0->rx_traffic_mask);
2651         atomic_dec(&nic->isr_cnt);
2652         return 0;
2653
2654 no_rx:
2655         dev->quota -= pkt_cnt;
2656         *budget -= pkt_cnt;
2657
2658         for (i = 0; i < config->rx_ring_num; i++) {
2659                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2660                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2661                         DBG_PRINT(ERR_DBG, " in Rx Poll!!\n");
2662                         break;
2663                 }
2664         }
2665         atomic_dec(&nic->isr_cnt);
2666         return 1;
2667 }
2668
2669 #ifdef CONFIG_NET_POLL_CONTROLLER
2670 /**
2671  * s2io_netpoll - netpoll event handler entry point
2672  * @dev : pointer to the device structure.
2673  * Description:
2674  *      This function will be called by upper layer to check for events on the
2675  * interface in situations where interrupts are disabled. It is used for
2676  * specific in-kernel networking tasks, such as remote consoles and kernel
2677  * debugging over the network (example netdump in RedHat).
2678  */
2679 static void s2io_netpoll(struct net_device *dev)
2680 {
2681         nic_t *nic = dev->priv;
2682         mac_info_t *mac_control;
2683         struct config_param *config;
2684         XENA_dev_config_t __iomem *bar0 = nic->bar0;
2685         u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
2686         int i;
2687
2688         disable_irq(dev->irq);
2689
2690         atomic_inc(&nic->isr_cnt);
2691         mac_control = &nic->mac_control;
2692         config = &nic->config;
2693
2694         writeq(val64, &bar0->rx_traffic_int);
2695         writeq(val64, &bar0->tx_traffic_int);
2696
2697         /* we need to free up the transmitted skbufs or else netpoll will
2698          * run out of skbs and will fail and eventually netpoll application such
2699          * as netdump will fail.
2700          */
2701         for (i = 0; i < config->tx_fifo_num; i++)
2702                 tx_intr_handler(&mac_control->fifos[i]);
2703
2704         /* check for received packet and indicate up to network */
2705         for (i = 0; i < config->rx_ring_num; i++)
2706                 rx_intr_handler(&mac_control->rings[i]);
2707
2708         for (i = 0; i < config->rx_ring_num; i++) {
2709                 if (fill_rx_buffers(nic, i) == -ENOMEM) {
2710                         DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
2711                         DBG_PRINT(ERR_DBG, " in Rx Netpoll!!\n");
2712                         break;
2713                 }
2714         }
2715         atomic_dec(&nic->isr_cnt);
2716         enable_irq(dev->irq);
2717         return;
2718 }
2719 #endif
2720
2721 /**
2722  *  rx_intr_handler - Rx interrupt handler
2723  *  @nic: device private variable.
2724  *  Description:
2725  *  If the interrupt is because of a received frame or if the
2726  *  receive ring contains fresh as yet un-processed frames,this function is
2727  *  called. It picks out the RxD at which place the last Rx processing had
2728  *  stopped and sends the skb to the OSM's Rx handler and then increments
2729  *  the offset.
2730  *  Return Value:
2731  *  NONE.
2732  */
2733 static void rx_intr_handler(ring_info_t *ring_data)
2734 {
2735         nic_t *nic = ring_data->nic;
2736         struct net_device *dev = (struct net_device *) nic->dev;
2737         int get_block, put_block, put_offset;
2738         rx_curr_get_info_t get_info, put_info;
2739         RxD_t *rxdp;
2740         struct sk_buff *skb;
2741         int pkt_cnt = 0;
2742         int i;
2743
2744         spin_lock(&nic->rx_lock);
2745         if (atomic_read(&nic->card_state) == CARD_DOWN) {
2746                 DBG_PRINT(INTR_DBG, "%s: %s going down for reset\n",
2747                           __FUNCTION__, dev->name);
2748                 spin_unlock(&nic->rx_lock);
2749                 return;
2750         }
2751
2752         get_info = ring_data->rx_curr_get_info;
2753         get_block = get_info.block_index;
2754         put_info = ring_data->rx_curr_put_info;
2755         put_block = put_info.block_index;
2756         rxdp = ring_data->rx_blocks[get_block].rxds[get_info.offset].virt_addr;
2757         if (!napi) {
2758                 spin_lock(&nic->put_lock);
2759                 put_offset = ring_data->put_pos;
2760                 spin_unlock(&nic->put_lock);
2761         } else
2762                 put_offset = ring_data->put_pos;
2763
2764         while (RXD_IS_UP2DT(rxdp)) {
2765                 /*
2766                  * If your are next to put index then it's
2767                  * FIFO full condition
2768                  */
2769                 if ((get_block == put_block) &&
2770                     (get_info.offset + 1) == put_info.offset) {
2771                         DBG_PRINT(INTR_DBG, "%s: Ring Full\n",dev->name);
2772                         break;
2773                 }
2774                 skb = (struct sk_buff *) ((unsigned long)rxdp->Host_Control);
2775                 if (skb == NULL) {
2776                         DBG_PRINT(ERR_DBG, "%s: The skb is ",
2777                                   dev->name);
2778                         DBG_PRINT(ERR_DBG, "Null in Rx Intr\n");
2779                         spin_unlock(&nic->rx_lock);
2780                         return;
2781                 }
2782                 if (nic->rxd_mode == RXD_MODE_1) {
2783                         pci_unmap_single(nic->pdev, (dma_addr_t)
2784                                  ((RxD1_t*)rxdp)->Buffer0_ptr,
2785                                  dev->mtu +
2786                                  HEADER_ETHERNET_II_802_3_SIZE +
2787                                  HEADER_802_2_SIZE +
2788                                  HEADER_SNAP_SIZE,
2789                                  PCI_DMA_FROMDEVICE);
2790                 } else if (nic->rxd_mode == RXD_MODE_3B) {
2791                         pci_dma_sync_single_for_cpu(nic->pdev, (dma_addr_t)
2792                                  ((RxD3_t*)rxdp)->Buffer0_ptr,
2793                                  BUF0_LEN, PCI_DMA_FROMDEVICE);
2794                         pci_unmap_single(nic->pdev, (dma_addr_t)
2795                                  ((RxD3_t*)rxdp)->Buffer2_ptr,
2796                                  dev->mtu + 4,
2797                                  PCI_DMA_FROMDEVICE);
2798                 } else {
2799                         pci_dma_sync_single_for_cpu(nic->pdev, (dma_addr_t)
2800                                          ((RxD3_t*)rxdp)->Buffer0_ptr, BUF0_LEN,
2801                                          PCI_DMA_FROMDEVICE);
2802                         pci_unmap_single(nic->pdev, (dma_addr_t)
2803                                          ((RxD3_t*)rxdp)->Buffer1_ptr,
2804                                          l3l4hdr_size + 4,
2805                                          PCI_DMA_FROMDEVICE);
2806                         pci_unmap_single(nic->pdev, (dma_addr_t)
2807                                          ((RxD3_t*)rxdp)->Buffer2_ptr,
2808                                          dev->mtu, PCI_DMA_FROMDEVICE);
2809                 }
2810                 prefetch(skb->data);
2811                 rx_osm_handler(ring_data, rxdp);
2812                 get_info.offset++;
2813                 ring_data->rx_curr_get_info.offset = get_info.offset;
2814                 rxdp = ring_data->rx_blocks[get_block].
2815                                 rxds[get_info.offset].virt_addr;
2816                 if (get_info.offset == rxd_count[nic->rxd_mode]) {
2817                         get_info.offset = 0;
2818                         ring_data->rx_curr_get_info.offset = get_info.offset;
2819                         get_block++;
2820                         if (get_block == ring_data->block_count)
2821                                 get_block = 0;
2822                         ring_data->rx_curr_get_info.block_index = get_block;
2823                         rxdp = ring_data->rx_blocks[get_block].block_virt_addr;
2824                 }
2825
2826                 nic->pkts_to_process -= 1;
2827                 if ((napi) && (!nic->pkts_to_process))
2828                         break;
2829                 pkt_cnt++;
2830                 if ((indicate_max_pkts) && (pkt_cnt > indicate_max_pkts))
2831                         break;
2832         }
2833         if (nic->lro) {
2834                 /* Clear all LRO sessions before exiting */
2835                 for (i=0; i<MAX_LRO_SESSIONS; i++) {
2836                         lro_t *lro = &nic->lro0_n[i];
2837                         if (lro->in_use) {
2838                                 update_L3L4_header(nic, lro);
2839                                 queue_rx_frame(lro->parent);
2840                                 clear_lro_session(lro);
2841                         }
2842                 }
2843         }
2844
2845         spin_unlock(&nic->rx_lock);
2846 }
2847
2848 /**
2849  *  tx_intr_handler - Transmit interrupt handler
2850  *  @nic : device private variable
2851  *  Description:
2852  *  If an interrupt was raised to indicate DMA complete of the
2853  *  Tx packet, this function is called. It identifies the last TxD
2854  *  whose buffer was freed and frees all skbs whose data have already
2855  *  DMA'ed into the NICs internal memory.
2856  *  Return Value:
2857  *  NONE
2858  */
2859
2860 static void tx_intr_handler(fifo_info_t *fifo_data)
2861 {
2862         nic_t *nic = fifo_data->nic;
2863         struct net_device *dev = (struct net_device *) nic->dev;
2864         tx_curr_get_info_t get_info, put_info;
2865         struct sk_buff *skb;
2866         TxD_t *txdlp;
2867
2868         get_info = fifo_data->tx_curr_get_info;
2869         put_info = fifo_data->tx_curr_put_info;
2870         txdlp = (TxD_t *) fifo_data->list_info[get_info.offset].
2871             list_virt_addr;
2872         while ((!(txdlp->Control_1 & TXD_LIST_OWN_XENA)) &&
2873                (get_info.offset != put_info.offset) &&
2874                (txdlp->Host_Control)) {
2875                 /* Check for TxD errors */
2876                 if (txdlp->Control_1 & TXD_T_CODE) {
2877                         unsigned long long err;
2878                         err = txdlp->Control_1 & TXD_T_CODE;
2879                         if (err & 0x1) {
2880                                 nic->mac_control.stats_info->sw_stat.
2881                                                 parity_err_cnt++;
2882                         }
2883                         if ((err >> 48) == 0xA) {
2884                                 DBG_PRINT(TX_DBG, "TxD returned due \
2885                                                 to loss of link\n");
2886                         }
2887                         else {
2888                                 DBG_PRINT(ERR_DBG, "***TxD error %llx\n", err);
2889                         }
2890                 }
2891
2892                 skb = s2io_txdl_getskb(fifo_data, txdlp, get_info.offset);
2893                 if (skb == NULL) {
2894                         DBG_PRINT(ERR_DBG, "%s: Null skb ",
2895                         __FUNCTION__);
2896                         DBG_PRINT(ERR_DBG, "in Tx Free Intr\n");
2897                         return;
2898                 }
2899
2900                 /* Updating the statistics block */
2901                 nic->stats.tx_bytes += skb->len;
2902                 dev_kfree_skb_irq(skb);
2903
2904                 get_info.offset++;
2905                 if (get_info.offset == get_info.fifo_len + 1)
2906                         get_info.offset = 0;
2907                 txdlp = (TxD_t *) fifo_data->list_info
2908                     [get_info.offset].list_virt_addr;
2909                 fifo_data->tx_curr_get_info.offset =
2910                     get_info.offset;
2911         }
2912
2913         spin_lock(&nic->tx_lock);
2914         if (netif_queue_stopped(dev))
2915                 netif_wake_queue(dev);
2916         spin_unlock(&nic->tx_lock);
2917 }
2918
2919 /**
2920  *  s2io_mdio_write - Function to write in to MDIO registers
2921  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
2922  *  @addr     : address value
2923  *  @value    : data value
2924  *  @dev      : pointer to net_device structure
2925  *  Description:
2926  *  This function is used to write values to the MDIO registers
2927  *  NONE
2928  */
2929 static void s2io_mdio_write(u32 mmd_type, u64 addr, u16 value, struct net_device *dev)
2930 {
2931         u64 val64 = 0x0;
2932         nic_t *sp = dev->priv;
2933         XENA_dev_config_t __iomem *bar0 = sp->bar0;
2934
2935         //address transaction
2936         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2937                         | MDIO_MMD_DEV_ADDR(mmd_type)
2938                         | MDIO_MMS_PRT_ADDR(0x0);
2939         writeq(val64, &bar0->mdio_control);
2940         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2941         writeq(val64, &bar0->mdio_control);
2942         udelay(100);
2943
2944         //Data transaction
2945         val64 = 0x0;
2946         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2947                         | MDIO_MMD_DEV_ADDR(mmd_type)
2948                         | MDIO_MMS_PRT_ADDR(0x0)
2949                         | MDIO_MDIO_DATA(value)
2950                         | MDIO_OP(MDIO_OP_WRITE_TRANS);
2951         writeq(val64, &bar0->mdio_control);
2952         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2953         writeq(val64, &bar0->mdio_control);
2954         udelay(100);
2955
2956         val64 = 0x0;
2957         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2958         | MDIO_MMD_DEV_ADDR(mmd_type)
2959         | MDIO_MMS_PRT_ADDR(0x0)
2960         | MDIO_OP(MDIO_OP_READ_TRANS);
2961         writeq(val64, &bar0->mdio_control);
2962         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2963         writeq(val64, &bar0->mdio_control);
2964         udelay(100);
2965
2966 }
2967
2968 /**
2969  *  s2io_mdio_read - Function to write in to MDIO registers
2970  *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
2971  *  @addr     : address value
2972  *  @dev      : pointer to net_device structure
2973  *  Description:
2974  *  This function is used to read values to the MDIO registers
2975  *  NONE
2976  */
2977 static u64 s2io_mdio_read(u32 mmd_type, u64 addr, struct net_device *dev)
2978 {
2979         u64 val64 = 0x0;
2980         u64 rval64 = 0x0;
2981         nic_t *sp = dev->priv;
2982         XENA_dev_config_t __iomem *bar0 = sp->bar0;
2983
2984         /* address transaction */
2985         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2986                         | MDIO_MMD_DEV_ADDR(mmd_type)
2987                         | MDIO_MMS_PRT_ADDR(0x0);
2988         writeq(val64, &bar0->mdio_control);
2989         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
2990         writeq(val64, &bar0->mdio_control);
2991         udelay(100);
2992
2993         /* Data transaction */
2994         val64 = 0x0;
2995         val64 = val64 | MDIO_MMD_INDX_ADDR(addr)
2996                         | MDIO_MMD_DEV_ADDR(mmd_type)
2997                         | MDIO_MMS_PRT_ADDR(0x0)
2998                         | MDIO_OP(MDIO_OP_READ_TRANS);
2999         writeq(val64, &bar0->mdio_control);
3000         val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
3001         writeq(val64, &bar0->mdio_control);
3002         udelay(100);
3003
3004         /* Read the value from regs */
3005         rval64 = readq(&bar0->mdio_control);
3006         rval64 = rval64 & 0xFFFF0000;
3007         rval64 = rval64 >> 16;
3008         return rval64;
3009 }
3010 /**
3011  *  s2io_chk_xpak_counter - Function to check the status of the xpak counters
3012  *  @counter      : couter value to be updated
3013  *  @flag         : flag to indicate the status
3014  *  @type         : counter type
3015  *  Description:
3016  *  This function is to check the status of the xpak counters value
3017  *  NONE
3018  */
3019
3020 static void s2io_chk_xpak_counter(u64 *counter, u64 * regs_stat, u32 index, u16 flag, u16 type)
3021 {
3022         u64 mask = 0x3;
3023         u64 val64;
3024         int i;
3025         for(i = 0; i <index; i++)
3026                 mask = mask << 0x2;
3027
3028         if(flag > 0)
3029         {
3030                 *counter = *counter + 1;
3031                 val64 = *regs_stat & mask;
3032                 val64 = val64 >> (index * 0x2);
3033                 val64 = val64 + 1;
3034                 if(val64 == 3)
3035                 {
3036                         switch(type)
3037                         {
3038                         case 1:
3039                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3040                                           "service. Excessive temperatures may "
3041                                           "result in premature transceiver "
3042                                           "failure \n");
3043                         break;
3044                         case 2:
3045                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3046                                           "service Excessive bias currents may "
3047                                           "indicate imminent laser diode "
3048                                           "failure \n");
3049                         break;
3050                         case 3:
3051                                 DBG_PRINT(ERR_DBG, "Take Xframe NIC out of "
3052                                           "service Excessive laser output "
3053                                           "power may saturate far-end "
3054                                           "receiver\n");
3055                         break;
3056                         default:
3057                                 DBG_PRINT(ERR_DBG, "Incorrect XPAK Alarm "
3058                                           "type \n");
3059                         }
3060                         val64 = 0x0;
3061                 }
3062                 val64 = val64 << (index * 0x2);
3063                 *regs_stat = (*regs_stat & (~mask)) | (val64);
3064
3065         } else {
3066                 *regs_stat = *regs_stat & (~mask);
3067         }
3068 }
3069
3070 /**
3071  *  s2io_updt_xpak_counter - Function to update the xpak counters
3072  *  @dev         : pointer to net_device struct
3073  *  Description:
3074  *  This function is to upate the status of the xpak counters value
3075  *  NONE
3076  */
3077 static void s2io_updt_xpak_counter(struct net_device *dev)
3078 {
3079         u16 flag  = 0x0;
3080         u16 type  = 0x0;
3081         u16 val16 = 0x0;
3082         u64 val64 = 0x0;
3083         u64 addr  = 0x0;
3084
3085         nic_t *sp = dev->priv;
3086         StatInfo_t *stat_info = sp->mac_control.stats_info;
3087
3088         /* Check the communication with the MDIO slave */
3089         addr = 0x0000;
3090         val64 = 0x0;
3091         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3092         if((val64 == 0xFFFF) || (val64 == 0x0000))
3093         {
3094                 DBG_PRINT(ERR_DBG, "ERR: MDIO slave access failed - "
3095                           "Returned %llx\n", (unsigned long long)val64);
3096                 return;
3097         }
3098
3099         /* Check for the expecte value of 2040 at PMA address 0x0000 */
3100         if(val64 != 0x2040)
3101         {
3102                 DBG_PRINT(ERR_DBG, "Incorrect value at PMA address 0x0000 - ");
3103                 DBG_PRINT(ERR_DBG, "Returned: %llx- Expected: 0x2040\n",
3104                           (unsigned long long)val64);
3105                 return;
3106         }
3107
3108         /* Loading the DOM register to MDIO register */
3109         addr = 0xA100;
3110         s2io_mdio_write(MDIO_MMD_PMA_DEV_ADDR, addr, val16, dev);
3111         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3112
3113         /* Reading the Alarm flags */
3114         addr = 0xA070;
3115         val64 = 0x0;
3116         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3117
3118         flag = CHECKBIT(val64, 0x7);
3119         type = 1;
3120         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_transceiver_temp_high,
3121                                 &stat_info->xpak_stat.xpak_regs_stat,
3122                                 0x0, flag, type);
3123
3124         if(CHECKBIT(val64, 0x6))
3125                 stat_info->xpak_stat.alarm_transceiver_temp_low++;
3126
3127         flag = CHECKBIT(val64, 0x3);
3128         type = 2;
3129         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_bias_current_high,
3130                                 &stat_info->xpak_stat.xpak_regs_stat,
3131                                 0x2, flag, type);
3132
3133         if(CHECKBIT(val64, 0x2))
3134                 stat_info->xpak_stat.alarm_laser_bias_current_low++;
3135
3136         flag = CHECKBIT(val64, 0x1);
3137         type = 3;
3138         s2io_chk_xpak_counter(&stat_info->xpak_stat.alarm_laser_output_power_high,
3139                                 &stat_info->xpak_stat.xpak_regs_stat,
3140                                 0x4, flag, type);
3141
3142         if(CHECKBIT(val64, 0x0))
3143                 stat_info->xpak_stat.alarm_laser_output_power_low++;
3144
3145         /* Reading the Warning flags */
3146         addr = 0xA074;
3147         val64 = 0x0;
3148         val64 = s2io_mdio_read(MDIO_MMD_PMA_DEV_ADDR, addr, dev);
3149
3150         if(CHECKBIT(val64, 0x7))
3151                 stat_info->xpak_stat.warn_transceiver_temp_high++;
3152
3153         if(CHECKBIT(val64, 0x6))
3154                 stat_info->xpak_stat.warn_transceiver_temp_low++;
3155
3156         if(CHECKBIT(val64, 0x3))
3157                 stat_info->xpak_stat.warn_laser_bias_current_high++;
3158
3159         if(CHECKBIT(val64, 0x2))
3160                 stat_info->xpak_stat.warn_laser_bias_current_low++;
3161
3162         if(CHECKBIT(val64, 0x1))
3163                 stat_info->xpak_stat.warn_laser_output_power_high++;
3164
3165         if(CHECKBIT(val64, 0x0))
3166                 stat_info->xpak_stat.warn_laser_output_power_low++;
3167 }
3168
3169 /**
3170  *  alarm_intr_handler - Alarm Interrrupt handler
3171  *  @nic: device private variable
3172  *  Description: If the interrupt was neither because of Rx packet or Tx
3173  *  complete, this function is called. If the interrupt was to indicate
3174  *  a loss of link, the OSM link status handler is invoked for any other
3175  *  alarm interrupt the block that raised the interrupt is displayed
3176  *  and a H/W reset is issued.
3177  *  Return Value:
3178  *  NONE
3179 */
3180
3181 static void alarm_intr_handler(struct s2io_nic *nic)
3182 {
3183         struct net_device *dev = (struct net_device *) nic->dev;
3184         XENA_dev_config_t __iomem *bar0 = nic->bar0;
3185         register u64 val64 = 0, err_reg = 0;
3186         u64 cnt;
3187         int i;
3188         nic->mac_control.stats_info->sw_stat.ring_full_cnt = 0;
3189         /* Handling the XPAK counters update */
3190         if(nic->mac_control.stats_info->xpak_stat.xpak_timer_count < 72000) {
3191                 /* waiting for an hour */
3192                 nic->mac_control.stats_info->xpak_stat.xpak_timer_count++;
3193         } else {
3194                 s2io_updt_xpak_counter(dev);
3195                 /* reset the count to zero */
3196                 nic->mac_control.stats_info->xpak_stat.xpak_timer_count = 0;
3197         }
3198
3199         /* Handling link status change error Intr */
3200         if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
3201                 err_reg = readq(&bar0->mac_rmac_err_reg);
3202                 writeq(err_reg, &bar0->mac_rmac_err_reg);
3203                 if (err_reg & RMAC_LINK_STATE_CHANGE_INT) {
3204                         schedule_work(&nic->set_link_task);
3205                 }
3206         }
3207
3208         /* Handling Ecc errors */
3209         val64 = readq(&bar0->mc_err_reg);
3210         writeq(val64, &bar0->mc_err_reg);
3211         if (val64 & (MC_ERR_REG_ECC_ALL_SNG | MC_ERR_REG_ECC_ALL_DBL)) {
3212                 if (val64 & MC_ERR_REG_ECC_ALL_DBL) {
3213                         nic->mac_control.stats_info->sw_stat.
3214                                 double_ecc_errs++;
3215                         DBG_PRINT(INIT_DBG, "%s: Device indicates ",
3216                                   dev->name);
3217                         DBG_PRINT(INIT_DBG, "double ECC error!!\n");
3218                         if (nic->device_type != XFRAME_II_DEVICE) {
3219                                 /* Reset XframeI only if critical error */
3220                                 if (val64 & (MC_ERR_REG_MIRI_ECC_DB_ERR_0 |
3221                                              MC_ERR_REG_MIRI_ECC_DB_ERR_1)) {
3222                                         netif_stop_queue(dev);
3223                                         schedule_work(&nic->rst_timer_task);
3224                                         nic->mac_control.stats_info->sw_stat.
3225                                                         soft_reset_cnt++;
3226                                 }
3227                         }
3228                 } else {
3229                         nic->mac_control.stats_info->sw_stat.
3230                                 single_ecc_errs++;
3231                 }
3232         }
3233
3234         /* In case of a serious error, the device will be Reset. */
3235         val64 = readq(&bar0->serr_source);
3236         if (val64 & SERR_SOURCE_ANY) {
3237                 nic->mac_control.stats_info->sw_stat.serious_err_cnt++;
3238                 DBG_PRINT(ERR_DBG, "%s: Device indicates ", dev->name);
3239                 DBG_PRINT(ERR_DBG, "serious error %llx!!\n",
3240                           (unsigned long long)val64);
3241                 netif_stop_queue(dev);
3242                 schedule_work(&nic->rst_timer_task);
3243                 nic->mac_control.stats_info->sw_stat.soft_reset_cnt++;
3244         }
3245
3246         /*
3247          * Also as mentioned in the latest Errata sheets if the PCC_FB_ECC
3248          * Error occurs, the adapter will be recycled by disabling the
3249          * adapter enable bit and enabling it again after the device
3250          * becomes Quiescent.
3251          */
3252         val64 = readq(&bar0->pcc_err_reg);
3253         writeq(val64, &bar0->pcc_err_reg);
3254         if (val64 & PCC_FB_ECC_DB_ERR) {
3255                 u64 ac = readq(&bar0->adapter_control);
3256                 ac &= ~(ADAPTER_CNTL_EN);
3257                 writeq(ac, &bar0->adapter_control);
3258                 ac = readq(&bar0->adapter_control);
3259                 schedule_work(&nic->set_link_task);
3260         }
3261         /* Check for data parity error */
3262         val64 = readq(&bar0->pic_int_status);
3263         if (val64 & PIC_INT_GPIO) {
3264                 val64 = readq(&bar0->gpio_int_reg);
3265                 if (val64 & GPIO_INT_REG_DP_ERR_INT) {
3266                         nic->mac_control.stats_info->sw_stat.parity_err_cnt++;
3267                         schedule_work(&nic->rst_timer_task);
3268                         nic->mac_control.stats_info->sw_stat.soft_reset_cnt++;
3269                 }
3270         }
3271
3272         /* Check for ring full counter */
3273         if (nic->device_type & XFRAME_II_DEVICE) {
3274                 val64 = readq(&bar0->ring_bump_counter1);
3275                 for (i=0; i<4; i++) {
3276                         cnt = ( val64 & vBIT(0xFFFF,(i*16),16));
3277                         cnt >>= 64 - ((i+1)*16);
3278                         nic->mac_control.stats_info->sw_stat.ring_full_cnt
3279                                 += cnt;
3280                 }
3281
3282                 val64 = readq(&bar0->ring_bump_counter2);
3283                 for (i=0; i<4; i++) {
3284                         cnt = ( val64 & vBIT(0xFFFF,(i*16),16));
3285                         cnt >>= 64 - ((i+1)*16);
3286                         nic->mac_control.stats_info->sw_stat.ring_full_cnt
3287                                 += cnt;
3288                 }
3289         }
3290
3291         /* Other type of interrupts are not being handled now,  TODO */
3292 }
3293
3294 /**
3295  *  wait_for_cmd_complete - waits for a command to complete.
3296  *  @sp : private member of the device structure, which is a pointer to the
3297  *  s2io_nic structure.
3298  *  Description: Function that waits for a command to Write into RMAC
3299  *  ADDR DATA registers to be completed and returns either success or
3300  *  error depending on whether the command was complete or not.
3301  *  Return value:
3302  *   SUCCESS on success and FAILURE on failure.
3303  */
3304
3305 static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit)
3306 {
3307         int ret = FAILURE, cnt = 0;
3308         u64 val64;
3309
3310         while (TRUE) {
3311                 val64 = readq(addr);
3312                 if (!(val64 & busy_bit)) {
3313                         ret = SUCCESS;
3314                         break;
3315                 }
3316
3317                 if(in_interrupt())
3318                         mdelay(50);
3319                 else
3320                         msleep(50);
3321
3322                 if (cnt++ > 10)
3323                         break;
3324         }
3325         return ret;
3326 }
3327 /*
3328  * check_pci_device_id - Checks if the device id is supported
3329  * @id : device id
3330  * Description: Function to check if the pci device id is supported by driver.
3331  * Return value: Actual device id if supported else PCI_ANY_ID
3332  */
3333 static u16 check_pci_device_id(u16 id)
3334 {
3335         switch (id) {
3336         case PCI_DEVICE_ID_HERC_WIN:
3337         case PCI_DEVICE_ID_HERC_UNI:
3338                 return XFRAME_II_DEVICE;
3339         case PCI_DEVICE_ID_S2IO_UNI:
3340         case PCI_DEVICE_ID_S2IO_WIN:
3341                 return XFRAME_I_DEVICE;
3342         default:
3343                 return PCI_ANY_ID;
3344         }
3345 }
3346
3347 /**
3348  *  s2io_reset - Resets the card.
3349  *  @sp : private member of the device structure.
3350  *  Description: Function to Reset the card. This function then also
3351  *  restores the previously saved PCI configuration space registers as
3352  *  the card reset also resets the configuration space.
3353  *  Return value:
3354  *  void.
3355  */
3356
3357 static void s2io_reset(nic_t * sp)
3358 {
3359         XENA_dev_config_t __iomem *bar0 = sp->bar0;
3360         u64 val64;
3361         u16 subid, pci_cmd;
3362         int i;
3363         u16 val16;
3364         DBG_PRINT(INIT_DBG,"%s - Resetting XFrame card %s\n",
3365                         __FUNCTION__, sp->dev->name);
3366
3367         /* Back up  the PCI-X CMD reg, dont want to lose MMRBC, OST settings */
3368         pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER, &(pci_cmd));
3369
3370         if (sp->device_type == XFRAME_II_DEVICE) {
3371                 int ret;
3372                 ret = pci_set_power_state(sp->pdev, 3);
3373                 if (!ret)
3374                         ret = pci_set_power_state(sp->pdev, 0);
3375                 else {
3376                         DBG_PRINT(ERR_DBG,"%s PME based SW_Reset failed!\n",
3377                                         __FUNCTION__);
3378                         goto old_way;
3379                 }
3380                 msleep(20);
3381                 goto new_way;
3382         }
3383 old_way:
3384         val64 = SW_RESET_ALL;
3385         writeq(val64, &bar0->sw_reset);
3386 new_way:
3387         if (strstr(sp->product_name, "CX4")) {
3388                 msleep(750);
3389         }
3390         msleep(250);
3391         for (i = 0; i < S2IO_MAX_PCI_CONFIG_SPACE_REINIT; i++) {
3392
3393                 /* Restore the PCI state saved during initialization. */
3394                 pci_restore_state(sp->pdev);
3395                 pci_read_config_word(sp->pdev, 0x2, &val16);
3396                 if (check_pci_device_id(val16) != (u16)PCI_ANY_ID)
3397                         break;
3398                 msleep(200);
3399         }
3400
3401         if (check_pci_device_id(val16) == (u16)PCI_ANY_ID) {
3402                 DBG_PRINT(ERR_DBG,"%s SW_Reset failed!\n", __FUNCTION__);
3403         }
3404
3405         pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER, pci_cmd);
3406
3407         s2io_init_pci(sp);
3408
3409         /* Set swapper to enable I/O register access */
3410         s2io_set_swapper(sp);
3411
3412         /* Restore the MSIX table entries from local variables */
3413         restore_xmsi_data(sp);
3414
3415         /* Clear certain PCI/PCI-X fields after reset */
3416         if (sp->device_type == XFRAME_II_DEVICE) {
3417                 /* Clear "detected parity error" bit */
3418                 pci_write_config_word(sp->pdev, PCI_STATUS, 0x8000);
3419
3420                 /* Clearing PCIX Ecc status register */
3421                 pci_write_config_dword(sp->pdev, 0x68, 0x7C);
3422
3423                 /* Clearing PCI_STATUS error reflected here */
3424                 writeq(BIT(62), &bar0->txpic_int_reg);
3425         }
3426
3427         /* Reset device statistics maintained by OS */
3428         memset(&sp->stats, 0, sizeof (struct net_device_stats));
3429
3430         /* SXE-002: Configure link and activity LED to turn it off */
3431         subid = sp->pdev->subsystem_device;
3432         if (((subid & 0xFF) >= 0x07) &&
3433             (sp->device_type == XFRAME_I_DEVICE)) {
3434                 val64 = readq(&bar0->gpio_control);
3435                 val64 |= 0x0000800000000000ULL;
3436                 writeq(val64, &bar0->gpio_control);
3437                 val64 = 0x0411040400000000ULL;
3438                 writeq(val64, (void __iomem *)bar0 + 0x2700);
3439         }
3440
3441         /*
3442          * Clear spurious ECC interrupts that would have occured on
3443          * XFRAME II cards after reset.
3444          */
3445         if (sp->device_type == XFRAME_II_DEVICE) {
3446                 val64 = readq(&bar0->pcc_err_reg);
3447                 writeq(val64, &bar0->pcc_err_reg);
3448         }
3449
3450         sp->device_enabled_once = FALSE;
3451 }
3452
3453 /**
3454  *  s2io_set_swapper - to set the swapper controle on the card
3455  *  @sp : private member of the device structure,
3456  *  pointer to the s2io_nic structure.
3457  *  Description: Function to set the swapper control on the card
3458  *  correctly depending on the 'endianness' of the system.
3459  *  Return value:
3460  *  SUCCESS on success and FAILURE on failure.
3461  */
3462
3463 static int s2io_set_swapper(nic_t * sp)
3464 {
3465         struct net_device *dev = sp->dev;
3466         XENA_dev_config_t __iomem *bar0 = sp->bar0;
3467         u64 val64, valt, valr;
3468
3469         /*
3470          * Set proper endian settings and verify the same by reading
3471          * the PIF Feed-back register.
3472          */
3473
3474         val64 = readq(&bar0->pif_rd_swapper_fb);
3475         if (val64 != 0x0123456789ABCDEFULL) {
3476                 int i = 0;
3477                 u64 value[] = { 0xC30000C3C30000C3ULL,   /* FE=1, SE=1 */
3478                                 0x8100008181000081ULL,  /* FE=1, SE=0 */
3479                                 0x4200004242000042ULL,  /* FE=0, SE=1 */
3480                                 0};                     /* FE=0, SE=0 */
3481
3482                 while(i<4) {
3483                         writeq(value[i], &bar0->swapper_ctrl);
3484                         val64 = readq(&bar0->pif_rd_swapper_fb);
3485                         if (val64 == 0x0123456789ABCDEFULL)
3486                                 break;
3487                         i++;
3488                 }
3489                 if (i == 4) {
3490                         DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3491                                 dev->name);
3492                         DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3493                                 (unsigned long long) val64);
3494                         return FAILURE;
3495                 }
3496                 valr = value[i];
3497         } else {
3498                 valr = readq(&bar0->swapper_ctrl);
3499         }
3500
3501         valt = 0x0123456789ABCDEFULL;
3502         writeq(valt, &bar0->xmsi_address);
3503         val64 = readq(&bar0->xmsi_address);
3504
3505         if(val64 != valt) {
3506                 int i = 0;
3507                 u64 value[] = { 0x00C3C30000C3C300ULL,  /* FE=1, SE=1 */
3508                                 0x0081810000818100ULL,  /* FE=1, SE=0 */
3509                                 0x0042420000424200ULL,  /* FE=0, SE=1 */
3510                                 0};                     /* FE=0, SE=0 */
3511
3512                 while(i<4) {
3513                         writeq((value[i] | valr), &bar0->swapper_ctrl);
3514                         writeq(valt, &bar0->xmsi_address);
3515                         val64 = readq(&bar0->xmsi_address);
3516                         if(val64 == valt)
3517                                 break;
3518                         i++;
3519                 }
3520                 if(i == 4) {
3521                         unsigned long long x = val64;
3522                         DBG_PRINT(ERR_DBG, "Write failed, Xmsi_addr ");
3523                         DBG_PRINT(ERR_DBG, "reads:0x%llx\n", x);
3524                         return FAILURE;
3525                 }
3526         }
3527         val64 = readq(&bar0->swapper_ctrl);
3528         val64 &= 0xFFFF000000000000ULL;
3529
3530 #ifdef  __BIG_ENDIAN
3531         /*
3532          * The device by default set to a big endian format, so a
3533          * big endian driver need not set anything.
3534          */
3535         val64 |= (SWAPPER_CTRL_TXP_FE |
3536                  SWAPPER_CTRL_TXP_SE |
3537                  SWAPPER_CTRL_TXD_R_FE |
3538                  SWAPPER_CTRL_TXD_W_FE |
3539                  SWAPPER_CTRL_TXF_R_FE |
3540                  SWAPPER_CTRL_RXD_R_FE |
3541                  SWAPPER_CTRL_RXD_W_FE |
3542                  SWAPPER_CTRL_RXF_W_FE |
3543                  SWAPPER_CTRL_XMSI_FE |
3544                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3545         if (sp->intr_type == INTA)
3546                 val64 |= SWAPPER_CTRL_XMSI_SE;
3547         writeq(val64, &bar0->swapper_ctrl);
3548 #else
3549         /*
3550          * Initially we enable all bits to make it accessible by the
3551          * driver, then we selectively enable only those bits that
3552          * we want to set.
3553          */
3554         val64 |= (SWAPPER_CTRL_TXP_FE |
3555                  SWAPPER_CTRL_TXP_SE |
3556                  SWAPPER_CTRL_TXD_R_FE |
3557                  SWAPPER_CTRL_TXD_R_SE |
3558                  SWAPPER_CTRL_TXD_W_FE |
3559                  SWAPPER_CTRL_TXD_W_SE |
3560                  SWAPPER_CTRL_TXF_R_FE |
3561                  SWAPPER_CTRL_RXD_R_FE |
3562                  SWAPPER_CTRL_RXD_R_SE |
3563                  SWAPPER_CTRL_RXD_W_FE |
3564                  SWAPPER_CTRL_RXD_W_SE |
3565                  SWAPPER_CTRL_RXF_W_FE |
3566                  SWAPPER_CTRL_XMSI_FE |
3567                  SWAPPER_CTRL_STATS_FE | SWAPPER_CTRL_STATS_SE);
3568         if (sp->intr_type == INTA)
3569                 val64 |= SWAPPER_CTRL_XMSI_SE;
3570         writeq(val64, &bar0->swapper_ctrl);
3571 #endif
3572         val64 = readq(&bar0->swapper_ctrl);
3573
3574         /*
3575          * Verifying if endian settings are accurate by reading a
3576          * feedback register.
3577          */
3578         val64 = readq(&bar0->pif_rd_swapper_fb);
3579         if (val64 != 0x0123456789ABCDEFULL) {
3580                 /* Endian settings are incorrect, calls for another dekko. */
3581                 DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, ",
3582                           dev->name);
3583                 DBG_PRINT(ERR_DBG, "feedback read %llx\n",
3584                           (unsigned long long) val64);
3585                 return FAILURE;
3586         }
3587
3588         return SUCCESS;
3589 }
3590
3591 static int wait_for_msix_trans(nic_t *nic, int i)
3592 {
3593         XENA_dev_config_t __iomem *bar0 = nic->bar0;
3594         u64 val64;
3595         int ret = 0, cnt = 0;
3596
3597         do {
3598                 val64 = readq(&bar0->xmsi_access);
3599                 if (!(val64 & BIT(15)))
3600                         break;
3601                 mdelay(1);
3602                 cnt++;
3603         } while(cnt < 5);
3604         if (cnt == 5) {