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   1 /**************************************************************************
   2  *
   3  * Copyright (C) 2000-2008 Alacritech, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above
  12  *    copyright notice, this list of conditions and the following
  13  *    disclaimer in the documentation and/or other materials provided
  14  *    with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY ALACRITECH, INC. ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ALACRITECH, INC. OR
  20  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * The views and conclusions contained in the software and documentation
  30  * are those of the authors and should not be interpreted as representing
  31  * official policies, either expressed or implied, of Alacritech, Inc.
  32  *
  33  **************************************************************************/
  34
  35 /*
  36  * FILENAME: sxg.c
  37  *
  38  * The SXG driver for Alacritech's 10Gbe products.
  39  *
  40  * NOTE: This is the standard, non-accelerated version of Alacritech's
  41  *       IS-NIC driver.
  42  */
  43
  44 #include <linux/kernel.h>
  45 #include <linux/string.h>
  46 #include <linux/errno.h>
  47 #include <linux/module.h>
  48 #include <linux/moduleparam.h>
  49 #include <linux/ioport.h>
  50 #include <linux/slab.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/timer.h>
  53 #include <linux/pci.h>
  54 #include <linux/spinlock.h>
  55 #include <linux/init.h>
  56 #include <linux/netdevice.h>
  57 #include <linux/etherdevice.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/skbuff.h>
  60 #include <linux/delay.h>
  61 #include <linux/types.h>
  62 #include <linux/dma-mapping.h>
  63 #include <linux/mii.h>
  64
  65 #define SLIC_DUMP_ENABLED               0
  66 #define SLIC_GET_STATS_ENABLED          0
  67 #define LINUX_FREES_ADAPTER_RESOURCES   1
  68 #define SXG_OFFLOAD_IP_CHECKSUM         0
  69 #define SXG_POWER_MANAGEMENT_ENABLED    0
  70 #define VPCI                            0
  71 #define DBG                             1
  72 #define ATK_DEBUG                       1
  73
  74 #include "sxg_os.h"
  75 #include "sxghw.h"
  76 #include "sxghif.h"
  77 #include "sxg.h"
  78 #include "sxgdbg.h"
  79
  80 #include "sxgphycode.h"
  81 #include "saharadbgdownload.h"
  82
  83 static int sxg_allocate_buffer_memory(p_adapter_t adapter, u32 Size,
  84                                       SXG_BUFFER_TYPE BufferType);
  85 static void sxg_allocate_rcvblock_complete(p_adapter_t adapter, void *RcvBlock,
  86                                            dma_addr_t PhysicalAddress,
  87                                            u32 Length);
  88 static void sxg_allocate_sgl_buffer_complete(p_adapter_t adapter,
  89                                              PSXG_SCATTER_GATHER SxgSgl,
  90                                              dma_addr_t PhysicalAddress,
  91                                              u32 Length);
  92
  93 static void sxg_mcast_init_crc32(void);
  94
  95 static int sxg_entry_open(p_net_device dev);
  96 static int sxg_entry_halt(p_net_device dev);
  97 static int sxg_ioctl(p_net_device dev, struct ifreq *rq, int cmd);
  98 static int sxg_send_packets(struct sk_buff *skb, p_net_device dev);
  99 static int sxg_transmit_packet(p_adapter_t adapter, struct sk_buff *skb);
 100 static void sxg_dumb_sgl(PSCATTER_GATHER_LIST pSgl, PSXG_SCATTER_GATHER SxgSgl);
 101
 102 static void sxg_handle_interrupt(p_adapter_t adapter);
 103 static int sxg_process_isr(p_adapter_t adapter, u32 MessageId);
 104 static u32 sxg_process_event_queue(p_adapter_t adapter, u32 RssId);
 105 static void sxg_complete_slow_send(p_adapter_t adapter);
 106 static struct sk_buff *sxg_slow_receive(p_adapter_t adapter, PSXG_EVENT Event);
 107 static void sxg_process_rcv_error(p_adapter_t adapter, u32 ErrorStatus);
 108 static bool sxg_mac_filter(p_adapter_t adapter,
 109                            p_ether_header EtherHdr, ushort length);
 110
 111 #if SLIC_GET_STATS_ENABLED
 112 static struct net_device_stats *sxg_get_stats(p_net_device dev);
 113 #endif
 114
 115 static int sxg_mac_set_address(p_net_device dev, void *ptr);
 116
 117 static void sxg_adapter_set_hwaddr(p_adapter_t adapter);
 118
 119 static void sxg_unmap_mmio_space(p_adapter_t adapter);
 120 static void sxg_mcast_set_mask(p_adapter_t adapter);
 121
 122 static int sxg_initialize_adapter(p_adapter_t adapter);
 123 static void sxg_stock_rcv_buffers(p_adapter_t adapter);
 124 static void sxg_complete_descriptor_blocks(p_adapter_t adapter,
 125                                            unsigned char Index);
 126 static int sxg_initialize_link(p_adapter_t adapter);
 127 static int sxg_phy_init(p_adapter_t adapter);
 128 static void sxg_link_event(p_adapter_t adapter);
 129 static SXG_LINK_STATE sxg_get_link_state(p_adapter_t adapter);
 130 static void sxg_link_state(p_adapter_t adapter, SXG_LINK_STATE LinkState);
 131 static int sxg_write_mdio_reg(p_adapter_t adapter,
 132                               u32 DevAddr, u32 RegAddr, u32 Value);
 133 static int sxg_read_mdio_reg(p_adapter_t adapter,
 134                              u32 DevAddr, u32 RegAddr, u32 *pValue);
 135 static void sxg_mcast_set_list(p_net_device dev);
 136
 137 #define XXXTODO 0
 138
 139 static unsigned int sxg_first_init = 1;
 140 static char *sxg_banner =
 141     "Alacritech SLIC Technology(tm) Server and Storage 10Gbe Accelerator (Non-Accelerated)\n";
 142
 143 static int sxg_debug = 1;
 144 static int debug = -1;
 145 static p_net_device head_netdevice = NULL;
 146
 147 static sxgbase_driver_t sxg_global = {
 148         .dynamic_intagg = 1,
 149 };
 150 static int intagg_delay = 100;
 151 static u32 dynamic_intagg = 0;
 152
 153 #define DRV_NAME        "sxg"
 154 #define DRV_VERSION     "1.0.1"
 155 #define DRV_AUTHOR      "Alacritech, Inc. Engineering"
 156 #define DRV_DESCRIPTION "Alacritech SLIC Techonology(tm) Non-Accelerated 10Gbe Driver"
 157 #define DRV_COPYRIGHT   "Copyright 2000-2008 Alacritech, Inc.  All rights reserved."
 158
 159 MODULE_AUTHOR(DRV_AUTHOR);
 160 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 161 MODULE_LICENSE("GPL");
 162
 163 module_param(dynamic_intagg, int, 0);
 164 MODULE_PARM_DESC(dynamic_intagg, "Dynamic Interrupt Aggregation Setting");
 165 module_param(intagg_delay, int, 0);
 166 MODULE_PARM_DESC(intagg_delay, "uSec Interrupt Aggregation Delay");
 167
 168 static struct pci_device_id sxg_pci_tbl[] __devinitdata = {
 169         {PCI_DEVICE(SXG_VENDOR_ID, SXG_DEVICE_ID)},
 170         {0,}
 171 };
 172
 173 MODULE_DEVICE_TABLE(pci, sxg_pci_tbl);
 174
 175 /***********************************************************************
 176 ************************************************************************
 177 ************************************************************************
 178 ************************************************************************
 179 ************************************************************************/
 180
 181 static inline void sxg_reg32_write(void __iomem *reg, u32 value, bool flush)
 182 {
 183         writel(value, reg);
 184         if (flush)
 185                 mb();
 186 }
 187
 188 static inline void sxg_reg64_write(p_adapter_t adapter, void __iomem *reg,
 189                                    u64 value, u32 cpu)
 190 {
 191         u32 value_high = (u32) (value >> 32);
 192         u32 value_low = (u32) (value & 0x00000000FFFFFFFF);
 193         unsigned long flags;
 194
 195         spin_lock_irqsave(&adapter->Bit64RegLock, flags);
 196         writel(value_high, (void __iomem *)(&adapter->UcodeRegs[cpu].Upper));
 197         writel(value_low, reg);
 198         spin_unlock_irqrestore(&adapter->Bit64RegLock, flags);
 199 }
 200
 201 static void sxg_init_driver(void)
 202 {
 203         if (sxg_first_init) {
 204                 DBG_ERROR("sxg: %s sxg_first_init set jiffies[%lx]\n",
 205                           __FUNCTION__, jiffies);
 206                 sxg_first_init = 0;
 207                 spin_lock_init(&sxg_global.driver_lock);
 208         }
 209 }
 210
 211 static void sxg_dbg_macaddrs(p_adapter_t adapter)
 212 {
 213         DBG_ERROR("  (%s) curr %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
 214                   adapter->netdev->name, adapter->currmacaddr[0],
 215                   adapter->currmacaddr[1], adapter->currmacaddr[2],
 216                   adapter->currmacaddr[3], adapter->currmacaddr[4],
 217                   adapter->currmacaddr[5]);
 218         DBG_ERROR("  (%s) mac  %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
 219                   adapter->netdev->name, adapter->macaddr[0],
 220                   adapter->macaddr[1], adapter->macaddr[2],
 221                   adapter->macaddr[3], adapter->macaddr[4],
 222                   adapter->macaddr[5]);
 223         return;
 224 }
 225
 226 // SXG Globals
 227 static SXG_DRIVER SxgDriver;
 228
 229 #ifdef  ATKDBG
 230 static sxg_trace_buffer_t LSxgTraceBuffer;
 231 #endif /* ATKDBG */
 232 static sxg_trace_buffer_t *SxgTraceBuffer = NULL;
 233
 234 /*
 235  * sxg_download_microcode
 236  *
 237  * Download Microcode to Sahara adapter
 238  *
 239  * Arguments -
 240  *              adapter         - A pointer to our adapter structure
 241  *              UcodeSel        - microcode file selection
 242  *
 243  * Return
 244  *      int
 245  */
 246 static bool sxg_download_microcode(p_adapter_t adapter, SXG_UCODE_SEL UcodeSel)
 247 {
 248         PSXG_HW_REGS HwRegs = adapter->HwRegs;
 249         u32 Section;
 250         u32 ThisSectionSize;
 251         u32 *Instruction = NULL;
 252         u32 BaseAddress, AddressOffset, Address;
 253 //      u32                         Failure;
 254         u32 ValueRead;
 255         u32 i;
 256         u32 numSections = 0;
 257         u32 sectionSize[16];
 258         u32 sectionStart[16];
 259
 260         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DnldUcod",
 261                   adapter, 0, 0, 0);
 262         DBG_ERROR("sxg: %s ENTER\n", __FUNCTION__);
 263
 264         switch (UcodeSel) {
 265         case SXG_UCODE_SAHARA:  // Sahara operational ucode
 266                 numSections = SNumSections;
 267                 for (i = 0; i < numSections; i++) {
 268                         sectionSize[i] = SSectionSize[i];
 269                         sectionStart[i] = SSectionStart[i];
 270                 }
 271                 break;
 272         default:
 273                 printk(KERN_ERR KBUILD_MODNAME
 274                        ": Woah, big error with the microcode!\n");
 275                 break;
 276         }
 277
 278         DBG_ERROR("sxg: RESET THE CARD\n");
 279         // First, reset the card
 280         WRITE_REG(HwRegs->Reset, 0xDEAD, FLUSH);
 281
 282         // Download each section of the microcode as specified in
 283         // its download file.  The *download.c file is generated using
 284         // the saharaobjtoc facility which converts the metastep .obj
 285         // file to a .c file which contains a two dimentional array.
 286         for (Section = 0; Section < numSections; Section++) {
 287                 DBG_ERROR("sxg: SECTION # %d\n", Section);
 288                 switch (UcodeSel) {
 289                 case SXG_UCODE_SAHARA:
 290                         Instruction = (u32 *) & SaharaUCode[Section][0];
 291                         break;
 292                 default:
 293                         ASSERT(0);
 294                         break;
 295                 }
 296                 BaseAddress = sectionStart[Section];
 297                 ThisSectionSize = sectionSize[Section] / 12;    // Size in instructions
 298                 for (AddressOffset = 0; AddressOffset < ThisSectionSize;
 299                      AddressOffset++) {
 300                         Address = BaseAddress + AddressOffset;
 301                         ASSERT((Address & ~MICROCODE_ADDRESS_MASK) == 0);
 302                         // Write instruction bits 31 - 0
 303                         WRITE_REG(HwRegs->UcodeDataLow, *Instruction, FLUSH);
 304                         // Write instruction bits 63-32
 305                         WRITE_REG(HwRegs->UcodeDataMiddle, *(Instruction + 1),
 306                                   FLUSH);
 307                         // Write instruction bits 95-64
 308                         WRITE_REG(HwRegs->UcodeDataHigh, *(Instruction + 2),
 309                                   FLUSH);
 310                         // Write instruction address with the WRITE bit set
 311                         WRITE_REG(HwRegs->UcodeAddr,
 312                                   (Address | MICROCODE_ADDRESS_WRITE), FLUSH);
 313                         // Sahara bug in the ucode download logic - the write to DataLow
 314                         // for the next instruction could get corrupted.  To avoid this,
 315                         // write to DataLow again for this instruction (which may get
 316                         // corrupted, but it doesn't matter), then increment the address
 317                         // and write the data for the next instruction to DataLow.  That
 318                         // write should succeed.
 319                         WRITE_REG(HwRegs->UcodeDataLow, *Instruction, TRUE);
 320                         // Advance 3 u32S to start of next instruction
 321                         Instruction += 3;
 322                 }
 323         }
 324         // Now repeat the entire operation reading the instruction back and
 325         // checking for parity errors
 326         for (Section = 0; Section < numSections; Section++) {
 327                 DBG_ERROR("sxg: check SECTION # %d\n", Section);
 328                 switch (UcodeSel) {
 329                 case SXG_UCODE_SAHARA:
 330                         Instruction = (u32 *) & SaharaUCode[Section][0];
 331                         break;
 332                 default:
 333                         ASSERT(0);
 334                         break;
 335                 }
 336                 BaseAddress = sectionStart[Section];
 337                 ThisSectionSize = sectionSize[Section] / 12;    // Size in instructions
 338                 for (AddressOffset = 0; AddressOffset < ThisSectionSize;
 339                      AddressOffset++) {
 340                         Address = BaseAddress + AddressOffset;
 341                         // Write the address with the READ bit set
 342                         WRITE_REG(HwRegs->UcodeAddr,
 343                                   (Address | MICROCODE_ADDRESS_READ), FLUSH);
 344                         // Read it back and check parity bit.
 345                         READ_REG(HwRegs->UcodeAddr, ValueRead);
 346                         if (ValueRead & MICROCODE_ADDRESS_PARITY) {
 347                                 DBG_ERROR("sxg: %s PARITY ERROR\n",
 348                                           __FUNCTION__);
 349
 350                                 return (FALSE); // Parity error
 351                         }
 352                         ASSERT((ValueRead & MICROCODE_ADDRESS_MASK) == Address);
 353                         // Read the instruction back and compare
 354                         READ_REG(HwRegs->UcodeDataLow, ValueRead);
 355                         if (ValueRead != *Instruction) {
 356                                 DBG_ERROR("sxg: %s MISCOMPARE LOW\n",
 357                                           __FUNCTION__);
 358                                 return (FALSE); // Miscompare
 359                         }
 360                         READ_REG(HwRegs->UcodeDataMiddle, ValueRead);
 361                         if (ValueRead != *(Instruction + 1)) {
 362                                 DBG_ERROR("sxg: %s MISCOMPARE MIDDLE\n",
 363                                           __FUNCTION__);
 364                                 return (FALSE); // Miscompare
 365                         }
 366                         READ_REG(HwRegs->UcodeDataHigh, ValueRead);
 367                         if (ValueRead != *(Instruction + 2)) {
 368                                 DBG_ERROR("sxg: %s MISCOMPARE HIGH\n",
 369                                           __FUNCTION__);
 370                                 return (FALSE); // Miscompare
 371                         }
 372                         // Advance 3 u32S to start of next instruction
 373                         Instruction += 3;
 374                 }
 375         }
 376
 377         // Everything OK, Go.
 378         WRITE_REG(HwRegs->UcodeAddr, MICROCODE_ADDRESS_GO, FLUSH);
 379
 380         // Poll the CardUp register to wait for microcode to initialize
 381         // Give up after 10,000 attemps (500ms).
 382         for (i = 0; i < 10000; i++) {
 383                 udelay(50);
 384                 READ_REG(adapter->UcodeRegs[0].CardUp, ValueRead);
 385                 if (ValueRead == 0xCAFE) {
 386                         DBG_ERROR("sxg: %s BOO YA 0xCAFE\n", __FUNCTION__);
 387                         break;
 388                 }
 389         }
 390         if (i == 10000) {
 391                 DBG_ERROR("sxg: %s TIMEOUT\n", __FUNCTION__);
 392
 393                 return (FALSE); // Timeout
 394         }
 395         // Now write the LoadSync register.  This is used to
 396         // synchronize with the card so it can scribble on the memory
 397         // that contained 0xCAFE from the "CardUp" step above
 398         if (UcodeSel == SXG_UCODE_SAHARA) {
 399                 WRITE_REG(adapter->UcodeRegs[0].LoadSync, 0, FLUSH);
 400         }
 401
 402         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XDnldUcd",
 403                   adapter, 0, 0, 0);
 404         DBG_ERROR("sxg: %s EXIT\n", __FUNCTION__);
 405
 406         return (TRUE);
 407 }
 408
 409 /*
 410  * sxg_allocate_resources - Allocate memory and locks
 411  *
 412  * Arguments -
 413  *      adapter         - A pointer to our adapter structure
 414  *
 415  * Return
 416  *      int
 417  */
 418 static int sxg_allocate_resources(p_adapter_t adapter)
 419 {
 420         int status;
 421         u32 i;
 422         u32 RssIds, IsrCount;
 423 //      PSXG_XMT_RING                                   XmtRing;
 424 //      PSXG_RCV_RING                                   RcvRing;
 425
 426         DBG_ERROR("%s ENTER\n", __FUNCTION__);
 427
 428         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AllocRes",
 429                   adapter, 0, 0, 0);
 430
 431         // Windows tells us how many CPUs it plans to use for
 432         // RSS
 433         RssIds = SXG_RSS_CPU_COUNT(adapter);
 434         IsrCount = adapter->MsiEnabled ? RssIds : 1;
 435
 436         DBG_ERROR("%s Setup the spinlocks\n", __FUNCTION__);
 437
 438         // Allocate spinlocks and initialize listheads first.
 439         spin_lock_init(&adapter->RcvQLock);
 440         spin_lock_init(&adapter->SglQLock);
 441         spin_lock_init(&adapter->XmtZeroLock);
 442         spin_lock_init(&adapter->Bit64RegLock);
 443         spin_lock_init(&adapter->AdapterLock);
 444
 445         DBG_ERROR("%s Setup the lists\n", __FUNCTION__);
 446
 447         InitializeListHead(&adapter->FreeRcvBuffers);
 448         InitializeListHead(&adapter->FreeRcvBlocks);
 449         InitializeListHead(&adapter->AllRcvBlocks);
 450         InitializeListHead(&adapter->FreeSglBuffers);
 451         InitializeListHead(&adapter->AllSglBuffers);
 452
 453         // Mark these basic allocations done.  This flags essentially
 454         // tells the SxgFreeResources routine that it can grab spinlocks
 455         // and reference listheads.
 456         adapter->BasicAllocations = TRUE;
 457         // Main allocation loop.  Start with the maximum supported by
 458         // the microcode and back off if memory allocation
 459         // fails.  If we hit a minimum, fail.
 460
 461         for (;;) {
 462                 DBG_ERROR("%s Allocate XmtRings size[%lx]\n", __FUNCTION__,
 463                           (sizeof(SXG_XMT_RING) * 1));
 464
 465                 // Start with big items first - receive and transmit rings.  At the moment
 466                 // I'm going to keep the ring size fixed and adjust the number of
 467                 // TCBs if we fail.  Later we might consider reducing the ring size as well..
 468                 adapter->XmtRings = pci_alloc_consistent(adapter->pcidev,
 469                                                          sizeof(SXG_XMT_RING) *
 470                                                          1,
 471                                                          &adapter->PXmtRings);
 472                 DBG_ERROR("%s XmtRings[%p]\n", __FUNCTION__, adapter->XmtRings);
 473
 474                 if (!adapter->XmtRings) {
 475                         goto per_tcb_allocation_failed;
 476                 }
 477                 memset(adapter->XmtRings, 0, sizeof(SXG_XMT_RING) * 1);
 478
 479                 DBG_ERROR("%s Allocate RcvRings size[%lx]\n", __FUNCTION__,
 480                           (sizeof(SXG_RCV_RING) * 1));
 481                 adapter->RcvRings =
 482                     pci_alloc_consistent(adapter->pcidev,
 483                                          sizeof(SXG_RCV_RING) * 1,
 484                                          &adapter->PRcvRings);
 485                 DBG_ERROR("%s RcvRings[%p]\n", __FUNCTION__, adapter->RcvRings);
 486                 if (!adapter->RcvRings) {
 487                         goto per_tcb_allocation_failed;
 488                 }
 489                 memset(adapter->RcvRings, 0, sizeof(SXG_RCV_RING) * 1);
 490                 break;
 491
 492               per_tcb_allocation_failed:
 493                 // an allocation failed.  Free any successful allocations.
 494                 if (adapter->XmtRings) {
 495                         pci_free_consistent(adapter->pcidev,
 496                                             sizeof(SXG_XMT_RING) * 4096,
 497                                             adapter->XmtRings,
 498                                             adapter->PXmtRings);
 499                         adapter->XmtRings = NULL;
 500                 }
 501                 if (adapter->RcvRings) {
 502                         pci_free_consistent(adapter->pcidev,
 503                                             sizeof(SXG_RCV_RING) * 4096,
 504                                             adapter->RcvRings,
 505                                             adapter->PRcvRings);
 506                         adapter->RcvRings = NULL;
 507                 }
 508                 // Loop around and try again....
 509         }
 510
 511         DBG_ERROR("%s Initialize RCV ZERO and XMT ZERO rings\n", __FUNCTION__);
 512         // Initialize rcv zero and xmt zero rings
 513         SXG_INITIALIZE_RING(adapter->RcvRingZeroInfo, SXG_RCV_RING_SIZE);
 514         SXG_INITIALIZE_RING(adapter->XmtRingZeroInfo, SXG_XMT_RING_SIZE);
 515
 516         // Sanity check receive data structure format
 517         ASSERT((adapter->ReceiveBufferSize == SXG_RCV_DATA_BUFFER_SIZE) ||
 518                (adapter->ReceiveBufferSize == SXG_RCV_JUMBO_BUFFER_SIZE));
 519         ASSERT(sizeof(SXG_RCV_DESCRIPTOR_BLOCK) ==
 520                SXG_RCV_DESCRIPTOR_BLOCK_SIZE);
 521
 522         // Allocate receive data buffers.  We allocate a block of buffers and
 523         // a corresponding descriptor block at once.  See sxghw.h:SXG_RCV_BLOCK
 524         for (i = 0; i < SXG_INITIAL_RCV_DATA_BUFFERS;
 525              i += SXG_RCV_DESCRIPTORS_PER_BLOCK) {
 526                 sxg_allocate_buffer_memory(adapter,
 527                                            SXG_RCV_BLOCK_SIZE(adapter->
 528                                                               ReceiveBufferSize),
 529                                            SXG_BUFFER_TYPE_RCV);
 530         }
 531         // NBL resource allocation can fail in the 'AllocateComplete' routine, which
 532         // doesn't return status.  Make sure we got the number of buffers we requested
 533         if (adapter->FreeRcvBufferCount < SXG_INITIAL_RCV_DATA_BUFFERS) {
 534                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF6",
 535                           adapter, adapter->FreeRcvBufferCount, SXG_MAX_ENTRIES,
 536                           0);
 537                 return (STATUS_RESOURCES);
 538         }
 539
 540         DBG_ERROR("%s Allocate EventRings size[%lx]\n", __FUNCTION__,
 541                   (sizeof(SXG_EVENT_RING) * RssIds));
 542
 543         // Allocate event queues.
 544         adapter->EventRings = pci_alloc_consistent(adapter->pcidev,
 545                                                    sizeof(SXG_EVENT_RING) *
 546                                                    RssIds,
 547                                                    &adapter->PEventRings);
 548
 549         if (!adapter->EventRings) {
 550                 // Caller will call SxgFreeAdapter to clean up above allocations
 551                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF8",
 552                           adapter, SXG_MAX_ENTRIES, 0, 0);
 553                 status = STATUS_RESOURCES;
 554                 goto per_tcb_allocation_failed;
 555         }
 556         memset(adapter->EventRings, 0, sizeof(SXG_EVENT_RING) * RssIds);
 557
 558         DBG_ERROR("%s Allocate ISR size[%x]\n", __FUNCTION__, IsrCount);
 559         // Allocate ISR
 560         adapter->Isr = pci_alloc_consistent(adapter->pcidev,
 561                                             IsrCount, &adapter->PIsr);
 562         if (!adapter->Isr) {
 563                 // Caller will call SxgFreeAdapter to clean up above allocations
 564                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF9",
 565                           adapter, SXG_MAX_ENTRIES, 0, 0);
 566                 status = STATUS_RESOURCES;
 567                 goto per_tcb_allocation_failed;
 568         }
 569         memset(adapter->Isr, 0, sizeof(u32) * IsrCount);
 570
 571         DBG_ERROR("%s Allocate shared XMT ring zero index location size[%lx]\n",
 572                   __FUNCTION__, sizeof(u32));
 573
 574         // Allocate shared XMT ring zero index location
 575         adapter->XmtRingZeroIndex = pci_alloc_consistent(adapter->pcidev,
 576                                                          sizeof(u32),
 577                                                          &adapter->
 578                                                          PXmtRingZeroIndex);
 579         if (!adapter->XmtRingZeroIndex) {
 580                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF10",
 581                           adapter, SXG_MAX_ENTRIES, 0, 0);
 582                 status = STATUS_RESOURCES;
 583                 goto per_tcb_allocation_failed;
 584         }
 585         memset(adapter->XmtRingZeroIndex, 0, sizeof(u32));
 586
 587         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAlcResS",
 588                   adapter, SXG_MAX_ENTRIES, 0, 0);
 589
 590         DBG_ERROR("%s EXIT\n", __FUNCTION__);
 591         return (STATUS_SUCCESS);
 592 }
 593
 594 /*
 595  * sxg_config_pci -
 596  *
 597  * Set up PCI Configuration space
 598  *
 599  * Arguments -
 600  *              pcidev                  - A pointer to our adapter structure
 601  *
 602  */
 603 static void sxg_config_pci(struct pci_dev *pcidev)
 604 {
 605         u16 pci_command;
 606         u16 new_command;
 607
 608         pci_read_config_word(pcidev, PCI_COMMAND, &pci_command);
 609         DBG_ERROR("sxg: %s  PCI command[%4.4x]\n", __FUNCTION__, pci_command);
 610         // Set the command register
 611         new_command = pci_command | (PCI_COMMAND_MEMORY |       // Memory Space Enable
 612                                      PCI_COMMAND_MASTER |       // Bus master enable
 613                                      PCI_COMMAND_INVALIDATE |   // Memory write and invalidate
 614                                      PCI_COMMAND_PARITY |       // Parity error response
 615                                      PCI_COMMAND_SERR | // System ERR
 616                                      PCI_COMMAND_FAST_BACK);    // Fast back-to-back
 617         if (pci_command != new_command) {
 618                 DBG_ERROR("%s -- Updating PCI COMMAND register %4.4x->%4.4x.\n",
 619                           __FUNCTION__, pci_command, new_command);
 620                 pci_write_config_word(pcidev, PCI_COMMAND, new_command);
 621         }
 622 }
 623
 624 static int sxg_entry_probe(struct pci_dev *pcidev,
 625                            const struct pci_device_id *pci_tbl_entry)
 626 {
 627         static int did_version = 0;
 628         int err;
 629         struct net_device *netdev;
 630         p_adapter_t adapter;
 631         void __iomem *memmapped_ioaddr;
 632         u32 status = 0;
 633         ulong mmio_start = 0;
 634         ulong mmio_len = 0;
 635
 636         DBG_ERROR("sxg: %s 2.6 VERSION ENTER jiffies[%lx] cpu %d\n",
 637                   __FUNCTION__, jiffies, smp_processor_id());
 638
 639         // Initialize trace buffer
 640 #ifdef ATKDBG
 641         SxgTraceBuffer = &LSxgTraceBuffer;
 642         SXG_TRACE_INIT(SxgTraceBuffer, TRACE_NOISY);
 643 #endif
 644
 645         sxg_global.dynamic_intagg = dynamic_intagg;
 646
 647         err = pci_enable_device(pcidev);
 648
 649         DBG_ERROR("Call pci_enable_device(%p)  status[%x]\n", pcidev, err);
 650         if (err) {
 651                 return err;
 652         }
 653
 654         if (sxg_debug > 0 && did_version++ == 0) {
 655                 printk(KERN_INFO "%s\n", sxg_banner);
 656                 printk(KERN_INFO "%s\n", DRV_VERSION);
 657         }
 658
 659         if (!(err = pci_set_dma_mask(pcidev, DMA_64BIT_MASK))) {
 660                 DBG_ERROR("pci_set_dma_mask(DMA_64BIT_MASK) successful\n");
 661         } else {
 662                 if ((err = pci_set_dma_mask(pcidev, DMA_32BIT_MASK))) {
 663                         DBG_ERROR
 664                             ("No usable DMA configuration, aborting  err[%x]\n",
 665                              err);
 666                         return err;
 667                 }
 668                 DBG_ERROR("pci_set_dma_mask(DMA_32BIT_MASK) successful\n");
 669         }
 670
 671         DBG_ERROR("Call pci_request_regions\n");
 672
 673         err = pci_request_regions(pcidev, DRV_NAME);
 674         if (err) {
 675                 DBG_ERROR("pci_request_regions FAILED err[%x]\n", err);
 676                 return err;
 677         }
 678
 679         DBG_ERROR("call pci_set_master\n");
 680         pci_set_master(pcidev);
 681
 682         DBG_ERROR("call alloc_etherdev\n");
 683         netdev = alloc_etherdev(sizeof(adapter_t));
 684         if (!netdev) {
 685                 err = -ENOMEM;
 686                 goto err_out_exit_sxg_probe;
 687         }
 688         DBG_ERROR("alloc_etherdev for slic netdev[%p]\n", netdev);
 689
 690         SET_NETDEV_DEV(netdev, &pcidev->dev);
 691
 692         pci_set_drvdata(pcidev, netdev);
 693         adapter = netdev_priv(netdev);
 694         adapter->netdev = netdev;
 695         adapter->pcidev = pcidev;
 696
 697         mmio_start = pci_resource_start(pcidev, 0);
 698         mmio_len = pci_resource_len(pcidev, 0);
 699
 700         DBG_ERROR("sxg: call ioremap(mmio_start[%lx], mmio_len[%lx])\n",
 701                   mmio_start, mmio_len);
 702
 703         memmapped_ioaddr = ioremap(mmio_start, mmio_len);
 704         DBG_ERROR("sxg: %s MEMMAPPED_IOADDR [%p]\n", __FUNCTION__,
 705                   memmapped_ioaddr);
 706         if (!memmapped_ioaddr) {
 707                 DBG_ERROR("%s cannot remap MMIO region %lx @ %lx\n",
 708                           __FUNCTION__, mmio_len, mmio_start);
 709                 goto err_out_free_mmio_region;
 710         }
 711
 712         DBG_ERROR
 713             ("sxg: %s found Alacritech SXG PCI, MMIO at %p, start[%lx] len[%lx], IRQ %d.\n",
 714              __func__, memmapped_ioaddr, mmio_start, mmio_len, pcidev->irq);
 715
 716         adapter->HwRegs = (void *)memmapped_ioaddr;
 717         adapter->base_addr = memmapped_ioaddr;
 718
 719         mmio_start = pci_resource_start(pcidev, 2);
 720         mmio_len = pci_resource_len(pcidev, 2);
 721
 722         DBG_ERROR("sxg: call ioremap(mmio_start[%lx], mmio_len[%lx])\n",
 723                   mmio_start, mmio_len);
 724
 725         memmapped_ioaddr = ioremap(mmio_start, mmio_len);
 726         DBG_ERROR("sxg: %s MEMMAPPED_IOADDR [%p]\n", __func__,
 727                   memmapped_ioaddr);
 728         if (!memmapped_ioaddr) {
 729                 DBG_ERROR("%s cannot remap MMIO region %lx @ %lx\n",
 730                           __FUNCTION__, mmio_len, mmio_start);
 731                 goto err_out_free_mmio_region;
 732         }
 733
 734         DBG_ERROR("sxg: %s found Alacritech SXG PCI, MMIO at %p, "
 735                   "start[%lx] len[%lx], IRQ %d.\n", __func__,
 736                   memmapped_ioaddr, mmio_start, mmio_len, pcidev->irq);
 737
 738         adapter->UcodeRegs = (void *)memmapped_ioaddr;
 739
 740         adapter->State = SXG_STATE_INITIALIZING;
 741         // Maintain a list of all adapters anchored by
 742         // the global SxgDriver structure.
 743         adapter->Next = SxgDriver.Adapters;
 744         SxgDriver.Adapters = adapter;
 745         adapter->AdapterID = ++SxgDriver.AdapterID;
 746
 747         // Initialize CRC table used to determine multicast hash
 748         sxg_mcast_init_crc32();
 749
 750         adapter->JumboEnabled = FALSE;
 751         adapter->RssEnabled = FALSE;
 752         if (adapter->JumboEnabled) {
 753                 adapter->FrameSize = JUMBOMAXFRAME;
 754                 adapter->ReceiveBufferSize = SXG_RCV_JUMBO_BUFFER_SIZE;
 755         } else {
 756                 adapter->FrameSize = ETHERMAXFRAME;
 757                 adapter->ReceiveBufferSize = SXG_RCV_DATA_BUFFER_SIZE;
 758         }
 759
 760 //    status = SXG_READ_EEPROM(adapter);
 761 //    if (!status) {
 762 //        goto sxg_init_bad;
 763 //    }
 764
 765         DBG_ERROR("sxg: %s ENTER sxg_config_pci\n", __FUNCTION__);
 766         sxg_config_pci(pcidev);
 767         DBG_ERROR("sxg: %s EXIT sxg_config_pci\n", __FUNCTION__);
 768
 769         DBG_ERROR("sxg: %s ENTER sxg_init_driver\n", __FUNCTION__);
 770         sxg_init_driver();
 771         DBG_ERROR("sxg: %s EXIT sxg_init_driver\n", __FUNCTION__);
 772
 773         adapter->vendid = pci_tbl_entry->vendor;
 774         adapter->devid = pci_tbl_entry->device;
 775         adapter->subsysid = pci_tbl_entry->subdevice;
 776         adapter->busnumber = pcidev->bus->number;
 777         adapter->slotnumber = ((pcidev->devfn >> 3) & 0x1F);
 778         adapter->functionnumber = (pcidev->devfn & 0x7);
 779         adapter->memorylength = pci_resource_len(pcidev, 0);
 780         adapter->irq = pcidev->irq;
 781         adapter->next_netdevice = head_netdevice;
 782         head_netdevice = netdev;
 783 //      adapter->chipid = chip_idx;
 784         adapter->port = 0;      //adapter->functionnumber;
 785         adapter->cardindex = adapter->port;
 786
 787         // Allocate memory and other resources
 788         DBG_ERROR("sxg: %s ENTER sxg_allocate_resources\n", __FUNCTION__);
 789         status = sxg_allocate_resources(adapter);
 790         DBG_ERROR("sxg: %s EXIT sxg_allocate_resources status %x\n",
 791                   __FUNCTION__, status);
 792         if (status != STATUS_SUCCESS) {
 793                 goto err_out_unmap;
 794         }
 795
 796         DBG_ERROR("sxg: %s ENTER sxg_download_microcode\n", __FUNCTION__);
 797         if (sxg_download_microcode(adapter, SXG_UCODE_SAHARA)) {
 798                 DBG_ERROR("sxg: %s ENTER sxg_adapter_set_hwaddr\n",
 799                           __FUNCTION__);
 800                 sxg_adapter_set_hwaddr(adapter);
 801         } else {
 802                 adapter->state = ADAPT_FAIL;
 803                 adapter->linkstate = LINK_DOWN;
 804                 DBG_ERROR("sxg_download_microcode FAILED status[%x]\n", status);
 805         }
 806
 807         netdev->base_addr = (unsigned long)adapter->base_addr;
 808         netdev->irq = adapter->irq;
 809         netdev->open = sxg_entry_open;
 810         netdev->stop = sxg_entry_halt;
 811         netdev->hard_start_xmit = sxg_send_packets;
 812         netdev->do_ioctl = sxg_ioctl;
 813 #if XXXTODO
 814         netdev->set_mac_address = sxg_mac_set_address;
 815 #if SLIC_GET_STATS_ENABLED
 816         netdev->get_stats = sxg_get_stats;
 817 #endif
 818         netdev->set_multicast_list = sxg_mcast_set_list;
 819 #endif
 820
 821         strcpy(netdev->name, "eth%d");
 822 //  strcpy(netdev->name, pci_name(pcidev));
 823         if ((err = register_netdev(netdev))) {
 824                 DBG_ERROR("Cannot register net device, aborting. %s\n",
 825                           netdev->name);
 826                 goto err_out_unmap;
 827         }
 828
 829         DBG_ERROR
 830             ("sxg: %s addr 0x%lx, irq %d, MAC addr %02X:%02X:%02X:%02X:%02X:%02X\n",
 831              netdev->name, netdev->base_addr, pcidev->irq, netdev->dev_addr[0],
 832              netdev->dev_addr[1], netdev->dev_addr[2], netdev->dev_addr[3],
 833              netdev->dev_addr[4], netdev->dev_addr[5]);
 834
 835 //sxg_init_bad:
 836         ASSERT(status == FALSE);
 837 //      sxg_free_adapter(adapter);
 838
 839         DBG_ERROR("sxg: %s EXIT status[%x] jiffies[%lx] cpu %d\n", __FUNCTION__,
 840                   status, jiffies, smp_processor_id());
 841         return status;
 842
 843       err_out_unmap:
 844         iounmap((void *)memmapped_ioaddr);
 845
 846       err_out_free_mmio_region:
 847         release_mem_region(mmio_start, mmio_len);
 848
 849       err_out_exit_sxg_probe:
 850
 851         DBG_ERROR("%s EXIT jiffies[%lx] cpu %d\n", __FUNCTION__, jiffies,
 852                   smp_processor_id());
 853
 854         return -ENODEV;
 855 }
 856
 857 /***********************************************************************
 858  * LINE BASE Interrupt routines..
 859  ***********************************************************************/
 860 /*
 861  *
 862  * sxg_disable_interrupt
 863  *
 864  * DisableInterrupt Handler
 865  *
 866  * Arguments:
 867  *
 868  *   adapter:   Our adapter structure
 869  *
 870  * Return Value:
 871  *      None.
 872  */
 873 static void sxg_disable_interrupt(p_adapter_t adapter)
 874 {
 875         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DisIntr",
 876                   adapter, adapter->InterruptsEnabled, 0, 0);
 877         // For now, RSS is disabled with line based interrupts
 878         ASSERT(adapter->RssEnabled == FALSE);
 879         ASSERT(adapter->MsiEnabled == FALSE);
 880         //
 881         // Turn off interrupts by writing to the icr register.
 882         //
 883         WRITE_REG(adapter->UcodeRegs[0].Icr, SXG_ICR(0, SXG_ICR_DISABLE), TRUE);
 884
 885         adapter->InterruptsEnabled = 0;
 886
 887         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XDisIntr",
 888                   adapter, adapter->InterruptsEnabled, 0, 0);
 889 }
 890
 891 /*
 892  *
 893  * sxg_enable_interrupt
 894  *
 895  * EnableInterrupt Handler
 896  *
 897  * Arguments:
 898  *
 899  *   adapter:   Our adapter structure
 900  *
 901  * Return Value:
 902  *      None.
 903  */
 904 static void sxg_enable_interrupt(p_adapter_t adapter)
 905 {
 906         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "EnIntr",
 907                   adapter, adapter->InterruptsEnabled, 0, 0);
 908         // For now, RSS is disabled with line based interrupts
 909         ASSERT(adapter->RssEnabled == FALSE);
 910         ASSERT(adapter->MsiEnabled == FALSE);
 911         //
 912         // Turn on interrupts by writing to the icr register.
 913         //
 914         WRITE_REG(adapter->UcodeRegs[0].Icr, SXG_ICR(0, SXG_ICR_ENABLE), TRUE);
 915
 916         adapter->InterruptsEnabled = 1;
 917
 918         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XEnIntr",
 919                   adapter, 0, 0, 0);
 920 }
 921
 922 /*
 923  *
 924  * sxg_isr - Process an line-based interrupt
 925  *
 926  * Arguments:
 927  *              Context                 - Our adapter structure
 928  *              QueueDefault    - Output parameter to queue to default CPU
 929  *              TargetCpus              - Output bitmap to schedule DPC's
 930  *
 931  * Return Value:
 932  *      TRUE if our interrupt
 933  */
 934 static irqreturn_t sxg_isr(int irq, void *dev_id)
 935 {
 936         p_net_device dev = (p_net_device) dev_id;
 937         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
 938 //      u32                 CpuMask = 0, i;
 939
 940         adapter->Stats.NumInts++;
 941         if (adapter->Isr[0] == 0) {
 942                 // The SLIC driver used to experience a number of spurious interrupts
 943                 // due to the delay associated with the masking of the interrupt
 944                 // (we'd bounce back in here).  If we see that again with Sahara,
 945                 // add a READ_REG of the Icr register after the WRITE_REG below.
 946                 adapter->Stats.FalseInts++;
 947                 return IRQ_NONE;
 948         }
 949         //
 950         // Move the Isr contents and clear the value in
 951         // shared memory, and mask interrupts
 952         //
 953         adapter->IsrCopy[0] = adapter->Isr[0];
 954         adapter->Isr[0] = 0;
 955         WRITE_REG(adapter->UcodeRegs[0].Icr, SXG_ICR(0, SXG_ICR_MASK), TRUE);
 956 //      ASSERT(adapter->IsrDpcsPending == 0);
 957 #if XXXTODO                     // RSS Stuff
 958         // If RSS is enabled and the ISR specifies
 959         // SXG_ISR_EVENT, then schedule DPC's
 960         // based on event queues.
 961         if (adapter->RssEnabled && (adapter->IsrCopy[0] & SXG_ISR_EVENT)) {
 962                 for (i = 0;
 963                      i < adapter->RssSystemInfo->ProcessorInfo.RssCpuCount;
 964                      i++) {
 965                         PSXG_EVENT_RING EventRing = &adapter->EventRings[i];
 966                         PSXG_EVENT Event =
 967                             &EventRing->Ring[adapter->NextEvent[i]];
 968                         unsigned char Cpu =
 969                             adapter->RssSystemInfo->RssIdToCpu[i];
 970                         if (Event->Status & EVENT_STATUS_VALID) {
 971                                 adapter->IsrDpcsPending++;
 972                                 CpuMask |= (1 << Cpu);
 973                         }
 974                 }
 975         }
 976         // Now, either schedule the CPUs specified by the CpuMask,
 977         // or queue default
 978         if (CpuMask) {
 979                 *QueueDefault = FALSE;
 980         } else {
 981                 adapter->IsrDpcsPending = 1;
 982                 *QueueDefault = TRUE;
 983         }
 984         *TargetCpus = CpuMask;
 985 #endif
 986         //
 987         //  There are no DPCs in Linux, so call the handler now
 988         //
 989         sxg_handle_interrupt(adapter);
 990
 991         return IRQ_HANDLED;
 992 }
 993
 994 static void sxg_handle_interrupt(p_adapter_t adapter)
 995 {
 996 //    unsigned char           RssId   = 0;
 997         u32 NewIsr;
 998
 999         if (adapter->Stats.RcvNoBuffer < 5) {
1000                 DBG_ERROR("Enter sxg_handle_interrupt ISR[%x]\n",
1001                           adapter->IsrCopy[0]);
1002         }
1003         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "HndlIntr",
1004                   adapter, adapter->IsrCopy[0], 0, 0);
1005         // For now, RSS is disabled with line based interrupts
1006         ASSERT(adapter->RssEnabled == FALSE);
1007         ASSERT(adapter->MsiEnabled == FALSE);
1008         ASSERT(adapter->IsrCopy[0]);
1009 /////////////////////////////
1010
1011         // Always process the event queue.
1012         sxg_process_event_queue(adapter,
1013                                 (adapter->RssEnabled ? /*RssId */ 0 : 0));
1014
1015 #if XXXTODO                     // RSS stuff
1016         if (--adapter->IsrDpcsPending) {
1017                 // We're done.
1018                 ASSERT(adapter->RssEnabled);
1019                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DPCsPend",
1020                           adapter, 0, 0, 0);
1021                 return;
1022         }
1023 #endif
1024         //
1025         // Last (or only) DPC processes the ISR and clears the interrupt.
1026         //
1027         NewIsr = sxg_process_isr(adapter, 0);
1028         //
1029         // Reenable interrupts
1030         //
1031         adapter->IsrCopy[0] = 0;
1032         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "ClearIsr",
1033                   adapter, NewIsr, 0, 0);
1034
1035         if (adapter->Stats.RcvNoBuffer < 5) {
1036                 DBG_ERROR
1037                     ("Exit sxg_handle_interrupt2 after enabling interrupt\n");
1038         }
1039
1040         WRITE_REG(adapter->UcodeRegs[0].Isr, NewIsr, TRUE);
1041
1042         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XHndlInt",
1043                   adapter, 0, 0, 0);
1044 }
1045
1046 /*
1047  *
1048  * sxg_process_isr - Process an interrupt.  Called from the line-based and
1049  *                      message based interrupt DPC routines
1050  *
1051  * Arguments:
1052  *              adapter                 - Our adapter structure
1053  *              Queue                   - The ISR that needs processing
1054  *
1055  * Return Value:
1056  *      None
1057  */
1058 static int sxg_process_isr(p_adapter_t adapter, u32 MessageId)
1059 {
1060         u32 Isr = adapter->IsrCopy[MessageId];
1061         u32 NewIsr = 0;
1062
1063         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "ProcIsr",
1064                   adapter, Isr, 0, 0);
1065
1066         // Error
1067         if (Isr & SXG_ISR_ERR) {
1068                 if (Isr & SXG_ISR_PDQF) {
1069                         adapter->Stats.PdqFull++;
1070                         DBG_ERROR("%s: SXG_ISR_ERR  PDQF!!\n", __FUNCTION__);
1071                 }
1072                 // No host buffer
1073                 if (Isr & SXG_ISR_RMISS) {
1074                         // There is a bunch of code in the SLIC driver which
1075                         // attempts to process more receive events per DPC
1076                         // if we start to fall behind.  We'll probably
1077                         // need to do something similar here, but hold
1078                         // off for now.  I don't want to make the code more
1079                         // complicated than strictly needed.
1080                         adapter->Stats.RcvNoBuffer++;
1081                         if (adapter->Stats.RcvNoBuffer < 5) {
1082                                 DBG_ERROR("%s: SXG_ISR_ERR  RMISS!!\n",
1083                                           __FUNCTION__);
1084                         }
1085                 }
1086                 // Card crash
1087                 if (Isr & SXG_ISR_DEAD) {
1088                         // Set aside the crash info and set the adapter state to RESET
1089                         adapter->CrashCpu =
1090                             (unsigned char)((Isr & SXG_ISR_CPU) >>
1091                                             SXG_ISR_CPU_SHIFT);
1092                         adapter->CrashLocation = (ushort) (Isr & SXG_ISR_CRASH);
1093                         adapter->Dead = TRUE;
1094                         DBG_ERROR("%s: ISR_DEAD %x, CPU: %d\n", __FUNCTION__,
1095                                   adapter->CrashLocation, adapter->CrashCpu);
1096                 }
1097                 // Event ring full
1098                 if (Isr & SXG_ISR_ERFULL) {
1099                         // Same issue as RMISS, really.  This means the
1100                         // host is falling behind the card.  Need to increase
1101                         // event ring size, process more events per interrupt,
1102                         // and/or reduce/remove interrupt aggregation.
1103                         adapter->Stats.EventRingFull++;
1104                         DBG_ERROR("%s: SXG_ISR_ERR  EVENT RING FULL!!\n",
1105                                   __FUNCTION__);
1106                 }
1107                 // Transmit drop - no DRAM buffers or XMT error
1108                 if (Isr & SXG_ISR_XDROP) {
1109                         adapter->Stats.XmtDrops++;
1110                         adapter->Stats.XmtErrors++;
1111                         DBG_ERROR("%s: SXG_ISR_ERR  XDROP!!\n", __FUNCTION__);
1112                 }
1113         }
1114         // Slowpath send completions
1115         if (Isr & SXG_ISR_SPSEND) {
1116                 sxg_complete_slow_send(adapter);
1117         }
1118         // Dump
1119         if (Isr & SXG_ISR_UPC) {
1120                 ASSERT(adapter->DumpCmdRunning);        // Maybe change when debug is added..
1121                 adapter->DumpCmdRunning = FALSE;
1122         }
1123         // Link event
1124         if (Isr & SXG_ISR_LINK) {
1125                 sxg_link_event(adapter);
1126         }
1127         // Debug - breakpoint hit
1128         if (Isr & SXG_ISR_BREAK) {
1129                 // At the moment AGDB isn't written to support interactive
1130                 // debug sessions.  When it is, this interrupt will be used
1131                 // to signal AGDB that it has hit a breakpoint.  For now, ASSERT.
1132                 ASSERT(0);
1133         }
1134         // Heartbeat response
1135         if (Isr & SXG_ISR_PING) {
1136                 adapter->PingOutstanding = FALSE;
1137         }
1138         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XProcIsr",
1139                   adapter, Isr, NewIsr, 0);
1140
1141         return (NewIsr);
1142 }
1143
1144 /*
1145  *
1146  * sxg_process_event_queue - Process our event queue
1147  *
1148  * Arguments:
1149  *              - adapter       - Adapter structure
1150  *              - RssId         - The event queue requiring processing
1151  *
1152  * Return Value:
1153  *      None.
1154  */
1155 static u32 sxg_process_event_queue(p_adapter_t adapter, u32 RssId)
1156 {
1157         PSXG_EVENT_RING EventRing = &adapter->EventRings[RssId];
1158         PSXG_EVENT Event = &EventRing->Ring[adapter->NextEvent[RssId]];
1159         u32 EventsProcessed = 0, Batches = 0;
1160         u32 num_skbs = 0;
1161         struct sk_buff *skb;
1162 #ifdef LINUX_HANDLES_RCV_INDICATION_LISTS
1163         struct sk_buff *prev_skb = NULL;
1164         struct sk_buff *IndicationList[SXG_RCV_ARRAYSIZE];
1165         u32 Index;
1166         PSXG_RCV_DATA_BUFFER_HDR RcvDataBufferHdr;
1167 #endif
1168         u32 ReturnStatus = 0;
1169
1170         ASSERT((adapter->State == SXG_STATE_RUNNING) ||
1171                (adapter->State == SXG_STATE_PAUSING) ||
1172                (adapter->State == SXG_STATE_PAUSED) ||
1173                (adapter->State == SXG_STATE_HALTING));
1174         // We may still have unprocessed events on the queue if
1175         // the card crashed.  Don't process them.
1176         if (adapter->Dead) {
1177                 return (0);
1178         }
1179         // In theory there should only be a single processor that
1180         // accesses this queue, and only at interrupt-DPC time.  So
1181         // we shouldn't need a lock for any of this.
1182         while (Event->Status & EVENT_STATUS_VALID) {
1183                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "Event",
1184                           Event, Event->Code, Event->Status,
1185                           adapter->NextEvent);
1186                 switch (Event->Code) {
1187                 case EVENT_CODE_BUFFERS:
1188                         ASSERT(!(Event->CommandIndex & 0xFF00));        // SXG_RING_INFO Head & Tail == unsigned char
1189                         //
1190                         sxg_complete_descriptor_blocks(adapter,
1191                                                        Event->CommandIndex);
1192                         //
1193                         break;
1194                 case EVENT_CODE_SLOWRCV:
1195                         --adapter->RcvBuffersOnCard;
1196                         if ((skb = sxg_slow_receive(adapter, Event))) {
1197                                 u32 rx_bytes;
1198 #ifdef LINUX_HANDLES_RCV_INDICATION_LISTS
1199                                 // Add it to our indication list
1200                                 SXG_ADD_RCV_PACKET(adapter, skb, prev_skb,
1201                                                    IndicationList, num_skbs);
1202                                 //  In Linux, we just pass up each skb to the protocol above at this point,
1203                                 //  there is no capability of an indication list.
1204 #else
1205 // CHECK            skb_pull(skb, INIC_RCVBUF_HEADSIZE);
1206                                 rx_bytes = Event->Length;       // (rcvbuf->length & IRHDDR_FLEN_MSK);
1207                                 skb_put(skb, rx_bytes);
1208                                 adapter->stats.rx_packets++;
1209                                 adapter->stats.rx_bytes += rx_bytes;
1210 #if SXG_OFFLOAD_IP_CHECKSUM
1211                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
1212 #endif
1213                                 skb->dev = adapter->netdev;
1214                                 skb->protocol = eth_type_trans(skb, skb->dev);
1215                                 netif_rx(skb);
1216 #endif
1217                         }
1218                         break;
1219                 default:
1220                         DBG_ERROR("%s: ERROR  Invalid EventCode %d\n",
1221                                   __FUNCTION__, Event->Code);
1222 //                      ASSERT(0);
1223                 }
1224                 // See if we need to restock card receive buffers.
1225                 // There are two things to note here:
1226                 //      First - This test is not SMP safe.  The
1227                 //              adapter->BuffersOnCard field is protected via atomic interlocked calls, but
1228                 //              we do not protect it with respect to these tests.  The only way to do that
1229                 //      is with a lock, and I don't want to grab a lock every time we adjust the
1230                 //      BuffersOnCard count.  Instead, we allow the buffer replenishment to be off
1231                 //      once in a while.  The worst that can happen is the card is given one
1232                 //      more-or-less descriptor block than the arbitrary value we've chosen.
1233                 //      No big deal
1234                 //      In short DO NOT ADD A LOCK HERE, OR WHERE RcvBuffersOnCard is adjusted.
1235                 //      Second - We expect this test to rarely evaluate to true.  We attempt to
1236                 //      refill descriptor blocks as they are returned to us
1237                 //      (sxg_complete_descriptor_blocks), so The only time this should evaluate
1238                 //      to true is when sxg_complete_descriptor_blocks failed to allocate
1239                 //              receive buffers.
1240                 if (adapter->RcvBuffersOnCard < SXG_RCV_DATA_BUFFERS) {
1241                         sxg_stock_rcv_buffers(adapter);
1242                 }
1243                 // It's more efficient to just set this to zero.
1244                 // But clearing the top bit saves potential debug info...
1245                 Event->Status &= ~EVENT_STATUS_VALID;
1246                 // Advanct to the next event
1247                 SXG_ADVANCE_INDEX(adapter->NextEvent[RssId], EVENT_RING_SIZE);
1248                 Event = &EventRing->Ring[adapter->NextEvent[RssId]];
1249                 EventsProcessed++;
1250                 if (EventsProcessed == EVENT_RING_BATCH) {
1251                         // Release a batch of events back to the card
1252                         WRITE_REG(adapter->UcodeRegs[RssId].EventRelease,
1253                                   EVENT_RING_BATCH, FALSE);
1254                         EventsProcessed = 0;
1255                         // If we've processed our batch limit, break out of the
1256                         // loop and return SXG_ISR_EVENT to arrange for us to
1257                         // be called again
1258                         if (Batches++ == EVENT_BATCH_LIMIT) {
1259                                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer,
1260                                           TRACE_NOISY, "EvtLimit", Batches,
1261                                           adapter->NextEvent, 0, 0);
1262                                 ReturnStatus = SXG_ISR_EVENT;
1263                                 break;
1264                         }
1265                 }
1266         }
1267 #ifdef LINUX_HANDLES_RCV_INDICATION_LISTS
1268         //
1269         // Indicate any received dumb-nic frames
1270         //
1271         SXG_INDICATE_PACKETS(adapter, IndicationList, num_skbs);
1272 #endif
1273         //
1274         // Release events back to the card.
1275         //
1276         if (EventsProcessed) {
1277                 WRITE_REG(adapter->UcodeRegs[RssId].EventRelease,
1278                           EventsProcessed, FALSE);
1279         }
1280         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XPrcEvnt",
1281                   Batches, EventsProcessed, adapter->NextEvent, num_skbs);
1282
1283         return (ReturnStatus);
1284 }
1285
1286 /*
1287  * sxg_complete_slow_send - Complete slowpath or dumb-nic sends
1288  *
1289  * Arguments -
1290  *      adapter         - A pointer to our adapter structure
1291
1292  * Return
1293  *      None
1294  */
1295 static void sxg_complete_slow_send(p_adapter_t adapter)
1296 {
1297         PSXG_XMT_RING XmtRing = &adapter->XmtRings[0];
1298         PSXG_RING_INFO XmtRingInfo = &adapter->XmtRingZeroInfo;
1299         u32 *ContextType;
1300         PSXG_CMD XmtCmd;
1301
1302         // NOTE - This lock is dropped and regrabbed in this loop.
1303         // This means two different processors can both be running
1304         // through this loop. Be *very* careful.
1305         spin_lock(&adapter->XmtZeroLock);
1306         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "CmpSnds",
1307                   adapter, XmtRingInfo->Head, XmtRingInfo->Tail, 0);
1308
1309         while (XmtRingInfo->Tail != *adapter->XmtRingZeroIndex) {
1310                 // Locate the current Cmd (ring descriptor entry), and
1311                 // associated SGL, and advance the tail
1312                 SXG_RETURN_CMD(XmtRing, XmtRingInfo, XmtCmd, ContextType);
1313                 ASSERT(ContextType);
1314                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "CmpSnd",
1315                           XmtRingInfo->Head, XmtRingInfo->Tail, XmtCmd, 0);
1316                 // Clear the SGL field.
1317                 XmtCmd->Sgl = 0;
1318
1319                 switch (*ContextType) {
1320                 case SXG_SGL_DUMB:
1321                         {
1322                                 struct sk_buff *skb;
1323                                 // Dumb-nic send.  Command context is the dumb-nic SGL
1324                                 skb = (struct sk_buff *)ContextType;
1325                                 // Complete the send
1326                                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer,
1327                                           TRACE_IMPORTANT, "DmSndCmp", skb, 0,
1328                                           0, 0);
1329                                 ASSERT(adapter->Stats.XmtQLen);
1330                                 adapter->Stats.XmtQLen--;       // within XmtZeroLock
1331                                 adapter->Stats.XmtOk++;
1332                                 // Now drop the lock and complete the send back to
1333                                 // Microsoft.  We need to drop the lock because
1334                                 // Microsoft can come back with a chimney send, which
1335                                 // results in a double trip in SxgTcpOuput
1336                                 spin_unlock(&adapter->XmtZeroLock);
1337                                 SXG_COMPLETE_DUMB_SEND(adapter, skb);
1338                                 // and reacquire..
1339                                 spin_lock(&adapter->XmtZeroLock);
1340                         }
1341                         break;
1342                 default:
1343                         ASSERT(0);
1344                 }
1345         }
1346         spin_unlock(&adapter->XmtZeroLock);
1347         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "CmpSnd",
1348                   adapter, XmtRingInfo->Head, XmtRingInfo->Tail, 0);
1349 }
1350
1351 /*
1352  * sxg_slow_receive
1353  *
1354  * Arguments -
1355  *      adapter         - A pointer to our adapter structure
1356  *      Event           - Receive event
1357  *
1358  * Return
1359  *       skb
1360  */
1361 static struct sk_buff *sxg_slow_receive(p_adapter_t adapter, PSXG_EVENT Event)
1362 {
1363         PSXG_RCV_DATA_BUFFER_HDR RcvDataBufferHdr;
1364         struct sk_buff *Packet;
1365
1366         RcvDataBufferHdr = (PSXG_RCV_DATA_BUFFER_HDR) Event->HostHandle;
1367         ASSERT(RcvDataBufferHdr);
1368         ASSERT(RcvDataBufferHdr->State == SXG_BUFFER_ONCARD);
1369         ASSERT(SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr) ==
1370                RcvDataBufferHdr->VirtualAddress);
1371         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_IMPORTANT, "SlowRcv", Event,
1372                   RcvDataBufferHdr, RcvDataBufferHdr->State,
1373                   RcvDataBufferHdr->VirtualAddress);
1374         // Drop rcv frames in non-running state
1375         switch (adapter->State) {
1376         case SXG_STATE_RUNNING:
1377                 break;
1378         case SXG_STATE_PAUSING:
1379         case SXG_STATE_PAUSED:
1380         case SXG_STATE_HALTING:
1381                 goto drop;
1382         default:
1383                 ASSERT(0);
1384                 goto drop;
1385         }
1386
1387         // Change buffer state to UPSTREAM
1388         RcvDataBufferHdr->State = SXG_BUFFER_UPSTREAM;
1389         if (Event->Status & EVENT_STATUS_RCVERR) {
1390                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "RcvError",
1391                           Event, Event->Status, Event->HostHandle, 0);
1392                 // XXXTODO - Remove this print later
1393                 DBG_ERROR("SXG: Receive error %x\n", *(u32 *)
1394                           SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr));
1395                 sxg_process_rcv_error(adapter, *(u32 *)
1396                                       SXG_RECEIVE_DATA_LOCATION
1397                                       (RcvDataBufferHdr));
1398                 goto drop;
1399         }
1400 #if XXXTODO                     // VLAN stuff
1401         // If there's a VLAN tag, extract it and validate it
1402         if (((p_ether_header) (SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr)))->
1403             EtherType == ETHERTYPE_VLAN) {
1404                 if (SxgExtractVlanHeader(adapter, RcvDataBufferHdr, Event) !=
1405                     STATUS_SUCCESS) {
1406                         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY,
1407                                   "BadVlan", Event,
1408                                   SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
1409                                   Event->Length, 0);
1410                         goto drop;
1411                 }
1412         }
1413 #endif
1414         //
1415         // Dumb-nic frame.  See if it passes our mac filter and update stats
1416         //
1417         if (!sxg_mac_filter(adapter, (p_ether_header)
1418                             SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
1419                             Event->Length)) {
1420                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "RcvFiltr",
1421                           Event, SXG_RECEIVE_DATA_LOCATION(RcvDataBufferHdr),
1422                           Event->Length, 0);
1423                 goto drop;
1424         }
1425
1426         Packet = RcvDataBufferHdr->SxgDumbRcvPacket;
1427
1428         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_IMPORTANT, "DumbRcv",
1429                   RcvDataBufferHdr, Packet, Event->Length, 0);
1430         //
1431         // Lastly adjust the receive packet length.
1432         //
1433         SXG_ADJUST_RCV_PACKET(Packet, RcvDataBufferHdr, Event);
1434
1435         return (Packet);
1436
1437       drop:
1438         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DropRcv",
1439                   RcvDataBufferHdr, Event->Length, 0, 0);
1440         adapter->Stats.RcvDiscards++;
1441         spin_lock(&adapter->RcvQLock);
1442         SXG_FREE_RCV_DATA_BUFFER(adapter, RcvDataBufferHdr);
1443         spin_unlock(&adapter->RcvQLock);
1444         return (NULL);
1445 }
1446
1447 /*
1448  * sxg_process_rcv_error - process receive error and update
1449  * stats
1450  *
1451  * Arguments:
1452  *              adapter         - Adapter structure
1453  *              ErrorStatus     - 4-byte receive error status
1454  *
1455  * Return Value:
1456  *      None
1457  */
1458 static void sxg_process_rcv_error(p_adapter_t adapter, u32 ErrorStatus)
1459 {
1460         u32 Error;
1461
1462         adapter->Stats.RcvErrors++;
1463
1464         if (ErrorStatus & SXG_RCV_STATUS_TRANSPORT_ERROR) {
1465                 Error = ErrorStatus & SXG_RCV_STATUS_TRANSPORT_MASK;
1466                 switch (Error) {
1467                 case SXG_RCV_STATUS_TRANSPORT_CSUM:
1468                         adapter->Stats.TransportCsum++;
1469                         break;
1470                 case SXG_RCV_STATUS_TRANSPORT_UFLOW:
1471                         adapter->Stats.TransportUflow++;
1472                         break;
1473                 case SXG_RCV_STATUS_TRANSPORT_HDRLEN:
1474                         adapter->Stats.TransportHdrLen++;
1475                         break;
1476                 }
1477         }
1478         if (ErrorStatus & SXG_RCV_STATUS_NETWORK_ERROR) {
1479                 Error = ErrorStatus & SXG_RCV_STATUS_NETWORK_MASK;
1480                 switch (Error) {
1481                 case SXG_RCV_STATUS_NETWORK_CSUM:
1482                         adapter->Stats.NetworkCsum++;
1483                         break;
1484                 case SXG_RCV_STATUS_NETWORK_UFLOW:
1485                         adapter->Stats.NetworkUflow++;
1486                         break;
1487                 case SXG_RCV_STATUS_NETWORK_HDRLEN:
1488                         adapter->Stats.NetworkHdrLen++;
1489                         break;
1490                 }
1491         }
1492         if (ErrorStatus & SXG_RCV_STATUS_PARITY) {
1493                 adapter->Stats.Parity++;
1494         }
1495         if (ErrorStatus & SXG_RCV_STATUS_LINK_ERROR) {
1496                 Error = ErrorStatus & SXG_RCV_STATUS_LINK_MASK;
1497                 switch (Error) {
1498                 case SXG_RCV_STATUS_LINK_PARITY:
1499                         adapter->Stats.LinkParity++;
1500                         break;
1501                 case SXG_RCV_STATUS_LINK_EARLY:
1502                         adapter->Stats.LinkEarly++;
1503                         break;
1504                 case SXG_RCV_STATUS_LINK_BUFOFLOW:
1505                         adapter->Stats.LinkBufOflow++;
1506                         break;
1507                 case SXG_RCV_STATUS_LINK_CODE:
1508                         adapter->Stats.LinkCode++;
1509                         break;
1510                 case SXG_RCV_STATUS_LINK_DRIBBLE:
1511                         adapter->Stats.LinkDribble++;
1512                         break;
1513                 case SXG_RCV_STATUS_LINK_CRC:
1514                         adapter->Stats.LinkCrc++;
1515                         break;
1516                 case SXG_RCV_STATUS_LINK_OFLOW:
1517                         adapter->Stats.LinkOflow++;
1518                         break;
1519                 case SXG_RCV_STATUS_LINK_UFLOW:
1520                         adapter->Stats.LinkUflow++;
1521                         break;
1522                 }
1523         }
1524 }
1525
1526 /*
1527  * sxg_mac_filter
1528  *
1529  * Arguments:
1530  *              adapter         - Adapter structure
1531  *              pether          - Ethernet header
1532  *              length          - Frame length
1533  *
1534  * Return Value:
1535  *      TRUE if the frame is to be allowed
1536  */
1537 static bool sxg_mac_filter(p_adapter_t adapter, p_ether_header EtherHdr,
1538                            ushort length)
1539 {
1540         bool EqualAddr;
1541
1542         if (SXG_MULTICAST_PACKET(EtherHdr)) {
1543                 if (SXG_BROADCAST_PACKET(EtherHdr)) {
1544                         // broadcast
1545                         if (adapter->MacFilter & MAC_BCAST) {
1546                                 adapter->Stats.DumbRcvBcastPkts++;
1547                                 adapter->Stats.DumbRcvBcastBytes += length;
1548                                 adapter->Stats.DumbRcvPkts++;
1549                                 adapter->Stats.DumbRcvBytes += length;
1550                                 return (TRUE);
1551                         }
1552                 } else {
1553                         // multicast
1554                         if (adapter->MacFilter & MAC_ALLMCAST) {
1555                                 adapter->Stats.DumbRcvMcastPkts++;
1556                                 adapter->Stats.DumbRcvMcastBytes += length;
1557                                 adapter->Stats.DumbRcvPkts++;
1558                                 adapter->Stats.DumbRcvBytes += length;
1559                                 return (TRUE);
1560                         }
1561                         if (adapter->MacFilter & MAC_MCAST) {
1562                                 PSXG_MULTICAST_ADDRESS MulticastAddrs =
1563                                     adapter->MulticastAddrs;
1564                                 while (MulticastAddrs) {
1565                                         ETHER_EQ_ADDR(MulticastAddrs->Address,
1566                                                       EtherHdr->ether_dhost,
1567                                                       EqualAddr);
1568                                         if (EqualAddr) {
1569                                                 adapter->Stats.
1570                                                     DumbRcvMcastPkts++;
1571                                                 adapter->Stats.
1572                                                     DumbRcvMcastBytes += length;
1573                                                 adapter->Stats.DumbRcvPkts++;
1574                                                 adapter->Stats.DumbRcvBytes +=
1575                                                     length;
1576                                                 return (TRUE);
1577                                         }
1578                                         MulticastAddrs = MulticastAddrs->Next;
1579                                 }
1580                         }
1581                 }
1582         } else if (adapter->MacFilter & MAC_DIRECTED) {
1583                 // Not broadcast or multicast.  Must be directed at us or
1584                 // the card is in promiscuous mode.  Either way, consider it
1585                 // ours if MAC_DIRECTED is set
1586                 adapter->Stats.DumbRcvUcastPkts++;
1587                 adapter->Stats.DumbRcvUcastBytes += length;
1588                 adapter->Stats.DumbRcvPkts++;
1589                 adapter->Stats.DumbRcvBytes += length;
1590                 return (TRUE);
1591         }
1592         if (adapter->MacFilter & MAC_PROMISC) {
1593                 // Whatever it is, keep it.
1594                 adapter->Stats.DumbRcvPkts++;
1595                 adapter->Stats.DumbRcvBytes += length;
1596                 return (TRUE);
1597         }
1598         adapter->Stats.RcvDiscards++;
1599         return (FALSE);
1600 }
1601
1602 static int sxg_register_interrupt(p_adapter_t adapter)
1603 {
1604         if (!adapter->intrregistered) {
1605                 int retval;
1606
1607                 DBG_ERROR
1608                     ("sxg: %s AllocAdaptRsrcs adapter[%p] dev->irq[%x] %x\n",
1609                      __FUNCTION__, adapter, adapter->netdev->irq, NR_IRQS);
1610
1611                 spin_unlock_irqrestore(&sxg_global.driver_lock,
1612                                        sxg_global.flags);
1613
1614                 retval = request_irq(adapter->netdev->irq,
1615                                      &sxg_isr,
1616                                      IRQF_SHARED,
1617                                      adapter->netdev->name, adapter->netdev);
1618
1619                 spin_lock_irqsave(&sxg_global.driver_lock, sxg_global.flags);
1620
1621                 if (retval) {
1622                         DBG_ERROR("sxg: request_irq (%s) FAILED [%x]\n",
1623                                   adapter->netdev->name, retval);
1624                         return (retval);
1625                 }
1626                 adapter->intrregistered = 1;
1627                 adapter->IntRegistered = TRUE;
1628                 // Disable RSS with line-based interrupts
1629                 adapter->MsiEnabled = FALSE;
1630                 adapter->RssEnabled = FALSE;
1631                 DBG_ERROR("sxg: %s AllocAdaptRsrcs adapter[%p] dev->irq[%x]\n",
1632                           __FUNCTION__, adapter, adapter->netdev->irq);
1633         }
1634         return (STATUS_SUCCESS);
1635 }
1636
1637 static void sxg_deregister_interrupt(p_adapter_t adapter)
1638 {
1639         DBG_ERROR("sxg: %s ENTER adapter[%p]\n", __FUNCTION__, adapter);
1640 #if XXXTODO
1641         slic_init_cleanup(adapter);
1642 #endif
1643         memset(&adapter->stats, 0, sizeof(struct net_device_stats));
1644         adapter->error_interrupts = 0;
1645         adapter->rcv_interrupts = 0;
1646         adapter->xmit_interrupts = 0;
1647         adapter->linkevent_interrupts = 0;
1648         adapter->upr_interrupts = 0;
1649         adapter->num_isrs = 0;
1650         adapter->xmit_completes = 0;
1651         adapter->rcv_broadcasts = 0;
1652         adapter->rcv_multicasts = 0;
1653         adapter->rcv_unicasts = 0;
1654         DBG_ERROR("sxg: %s EXIT\n", __FUNCTION__);
1655 }
1656
1657 /*
1658  *  sxg_if_init
1659  *
1660  *  Perform initialization of our slic interface.
1661  *
1662  */
1663 static int sxg_if_init(p_adapter_t adapter)
1664 {
1665         p_net_device dev = adapter->netdev;
1666         int status = 0;
1667
1668         DBG_ERROR("sxg: %s (%s) ENTER states[%d:%d:%d] flags[%x]\n",
1669                   __FUNCTION__, adapter->netdev->name,
1670                   adapter->queues_initialized, adapter->state,
1671                   adapter->linkstate, dev->flags);
1672
1673         /* adapter should be down at this point */
1674         if (adapter->state != ADAPT_DOWN) {
1675                 DBG_ERROR("sxg_if_init adapter->state != ADAPT_DOWN\n");
1676                 return (-EIO);
1677         }
1678         ASSERT(adapter->linkstate == LINK_DOWN);
1679
1680         adapter->devflags_prev = dev->flags;
1681         adapter->macopts = MAC_DIRECTED;
1682         if (dev->flags) {
1683                 DBG_ERROR("sxg: %s (%s) Set MAC options: ", __FUNCTION__,
1684                           adapter->netdev->name);
1685                 if (dev->flags & IFF_BROADCAST) {
1686                         adapter->macopts |= MAC_BCAST;
1687                         DBG_ERROR("BCAST ");
1688                 }
1689                 if (dev->flags & IFF_PROMISC) {
1690                         adapter->macopts |= MAC_PROMISC;
1691                         DBG_ERROR("PROMISC ");
1692                 }
1693                 if (dev->flags & IFF_ALLMULTI) {
1694                         adapter->macopts |= MAC_ALLMCAST;
1695                         DBG_ERROR("ALL_MCAST ");
1696                 }
1697                 if (dev->flags & IFF_MULTICAST) {
1698                         adapter->macopts |= MAC_MCAST;
1699                         DBG_ERROR("MCAST ");
1700                 }
1701                 DBG_ERROR("\n");
1702         }
1703         status = sxg_register_interrupt(adapter);
1704         if (status != STATUS_SUCCESS) {
1705                 DBG_ERROR("sxg_if_init: sxg_register_interrupt FAILED %x\n",
1706                           status);
1707                 sxg_deregister_interrupt(adapter);
1708                 return (status);
1709         }
1710
1711         adapter->state = ADAPT_UP;
1712
1713         /*
1714          *    clear any pending events, then enable interrupts
1715          */
1716         DBG_ERROR("sxg: %s ENABLE interrupts(slic)\n", __FUNCTION__);
1717
1718         return (STATUS_SUCCESS);
1719 }
1720
1721 static int sxg_entry_open(p_net_device dev)
1722 {
1723         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
1724         int status;
1725
1726         ASSERT(adapter);
1727         DBG_ERROR("sxg: %s adapter->activated[%d]\n", __FUNCTION__,
1728                   adapter->activated);
1729         DBG_ERROR
1730             ("sxg: %s (%s): [jiffies[%lx] cpu %d] dev[%p] adapt[%p] port[%d]\n",
1731              __FUNCTION__, adapter->netdev->name, jiffies, smp_processor_id(),
1732              adapter->netdev, adapter, adapter->port);
1733
1734         netif_stop_queue(adapter->netdev);
1735
1736         spin_lock_irqsave(&sxg_global.driver_lock, sxg_global.flags);
1737         if (!adapter->activated) {
1738                 sxg_global.num_sxg_ports_active++;
1739                 adapter->activated = 1;
1740         }
1741         // Initialize the adapter
1742         DBG_ERROR("sxg: %s ENTER sxg_initialize_adapter\n", __FUNCTION__);
1743         status = sxg_initialize_adapter(adapter);
1744         DBG_ERROR("sxg: %s EXIT sxg_initialize_adapter status[%x]\n",
1745                   __FUNCTION__, status);
1746
1747         if (status == STATUS_SUCCESS) {
1748                 DBG_ERROR("sxg: %s ENTER sxg_if_init\n", __FUNCTION__);
1749                 status = sxg_if_init(adapter);
1750                 DBG_ERROR("sxg: %s EXIT sxg_if_init status[%x]\n", __FUNCTION__,
1751                           status);
1752         }
1753
1754         if (status != STATUS_SUCCESS) {
1755                 if (adapter->activated) {
1756                         sxg_global.num_sxg_ports_active--;
1757                         adapter->activated = 0;
1758                 }
1759                 spin_unlock_irqrestore(&sxg_global.driver_lock,
1760                                        sxg_global.flags);
1761                 return (status);
1762         }
1763         DBG_ERROR("sxg: %s ENABLE ALL INTERRUPTS\n", __FUNCTION__);
1764
1765         // Enable interrupts
1766         SXG_ENABLE_ALL_INTERRUPTS(adapter);
1767
1768         DBG_ERROR("sxg: %s EXIT\n", __FUNCTION__);
1769
1770         spin_unlock_irqrestore(&sxg_global.driver_lock, sxg_global.flags);
1771         return STATUS_SUCCESS;
1772 }
1773
1774 static void __devexit sxg_entry_remove(struct pci_dev *pcidev)
1775 {
1776         p_net_device dev = pci_get_drvdata(pcidev);
1777         u32 mmio_start = 0;
1778         unsigned int mmio_len = 0;
1779         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
1780
1781         ASSERT(adapter);
1782         DBG_ERROR("sxg: %s ENTER dev[%p] adapter[%p]\n", __FUNCTION__, dev,
1783                   adapter);
1784         sxg_deregister_interrupt(adapter);
1785         sxg_unmap_mmio_space(adapter);
1786         DBG_ERROR("sxg: %s unregister_netdev\n", __FUNCTION__);
1787         unregister_netdev(dev);
1788
1789         mmio_start = pci_resource_start(pcidev, 0);
1790         mmio_len = pci_resource_len(pcidev, 0);
1791
1792         DBG_ERROR("sxg: %s rel_region(0) start[%x] len[%x]\n", __FUNCTION__,
1793                   mmio_start, mmio_len);
1794         release_mem_region(mmio_start, mmio_len);
1795
1796         DBG_ERROR("sxg: %s iounmap dev->base_addr[%x]\n", __FUNCTION__,
1797                   (unsigned int)dev->base_addr);
1798         iounmap((char *)dev->base_addr);
1799
1800         DBG_ERROR("sxg: %s deallocate device\n", __FUNCTION__);
1801         kfree(dev);
1802         DBG_ERROR("sxg: %s EXIT\n", __FUNCTION__);
1803 }
1804
1805 static int sxg_entry_halt(p_net_device dev)
1806 {
1807         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
1808
1809         spin_lock_irqsave(&sxg_global.driver_lock, sxg_global.flags);
1810         DBG_ERROR("sxg: %s (%s) ENTER\n", __FUNCTION__, dev->name);
1811
1812         netif_stop_queue(adapter->netdev);
1813         adapter->state = ADAPT_DOWN;
1814         adapter->linkstate = LINK_DOWN;
1815         adapter->devflags_prev = 0;
1816         DBG_ERROR("sxg: %s (%s) set adapter[%p] state to ADAPT_DOWN(%d)\n",
1817                   __FUNCTION__, dev->name, adapter, adapter->state);
1818
1819         DBG_ERROR("sxg: %s (%s) EXIT\n", __FUNCTION__, dev->name);
1820         DBG_ERROR("sxg: %s EXIT\n", __FUNCTION__);
1821         spin_unlock_irqrestore(&sxg_global.driver_lock, sxg_global.flags);
1822         return (STATUS_SUCCESS);
1823 }
1824
1825 static int sxg_ioctl(p_net_device dev, struct ifreq *rq, int cmd)
1826 {
1827         ASSERT(rq);
1828 //      DBG_ERROR("sxg: %s cmd[%x] rq[%p] dev[%p]\n", __FUNCTION__, cmd, rq, dev);
1829         switch (cmd) {
1830         case SIOCSLICSETINTAGG:
1831                 {
1832 //                      p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
1833                         u32 data[7];
1834                         u32 intagg;
1835
1836                         if (copy_from_user(data, rq->ifr_data, 28)) {
1837                                 DBG_ERROR
1838                                     ("copy_from_user FAILED  getting initial params\n");
1839                                 return -EFAULT;
1840                         }
1841                         intagg = data[0];
1842                         printk(KERN_EMERG
1843                                "%s: set interrupt aggregation to %d\n",
1844                                __FUNCTION__, intagg);
1845                         return 0;
1846                 }
1847
1848         default:
1849 //              DBG_ERROR("sxg: %s UNSUPPORTED[%x]\n", __FUNCTION__, cmd);
1850                 return -EOPNOTSUPP;
1851         }
1852         return 0;
1853 }
1854
1855 #define NORMAL_ETHFRAME     0
1856
1857 /*
1858  *
1859  * sxg_send_packets - Send a skb packet
1860  *
1861  * Arguments:
1862  *                      skb                     - The packet to send
1863  *                      dev                     - Our linux net device that refs our adapter
1864  *
1865  * Return:
1866  *              0   regardless of outcome    XXXTODO refer to e1000 driver
1867  */
1868 static int sxg_send_packets(struct sk_buff *skb, p_net_device dev)
1869 {
1870         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
1871         u32 status = STATUS_SUCCESS;
1872
1873         DBG_ERROR("sxg: %s ENTER sxg_send_packets skb[%p]\n", __FUNCTION__,
1874                   skb);
1875         // Check the adapter state
1876         switch (adapter->State) {
1877         case SXG_STATE_INITIALIZING:
1878         case SXG_STATE_HALTED:
1879         case SXG_STATE_SHUTDOWN:
1880                 ASSERT(0);      // unexpected
1881                 // fall through
1882         case SXG_STATE_RESETTING:
1883         case SXG_STATE_SLEEP:
1884         case SXG_STATE_BOOTDIAG:
1885         case SXG_STATE_DIAG:
1886         case SXG_STATE_HALTING:
1887                 status = STATUS_FAILURE;
1888                 break;
1889         case SXG_STATE_RUNNING:
1890                 if (adapter->LinkState != SXG_LINK_UP) {
1891                         status = STATUS_FAILURE;
1892                 }
1893                 break;
1894         default:
1895                 ASSERT(0);
1896                 status = STATUS_FAILURE;
1897         }
1898         if (status != STATUS_SUCCESS) {
1899                 goto xmit_fail;
1900         }
1901         // send a packet
1902         status = sxg_transmit_packet(adapter, skb);
1903         if (status == STATUS_SUCCESS) {
1904                 goto xmit_done;
1905         }
1906
1907       xmit_fail:
1908         // reject & complete all the packets if they cant be sent
1909         if (status != STATUS_SUCCESS) {
1910 #if XXXTODO
1911 //      sxg_send_packets_fail(adapter, skb, status);
1912 #else
1913                 SXG_DROP_DUMB_SEND(adapter, skb);
1914                 adapter->stats.tx_dropped++;
1915 #endif
1916         }
1917         DBG_ERROR("sxg: %s EXIT sxg_send_packets status[%x]\n", __FUNCTION__,
1918                   status);
1919
1920       xmit_done:
1921         return 0;
1922 }
1923
1924 /*
1925  * sxg_transmit_packet
1926  *
1927  * This function transmits a single packet.
1928  *
1929  * Arguments -
1930  *              adapter                 - Pointer to our adapter structure
1931  *      skb             - The packet to be sent
1932  *
1933  * Return -
1934  *              STATUS of send
1935  */
1936 static int sxg_transmit_packet(p_adapter_t adapter, struct sk_buff *skb)
1937 {
1938         PSCATTER_GATHER_LIST pSgl;
1939         PSXG_SCATTER_GATHER SxgSgl;
1940         void *SglBuffer;
1941         u32 SglBufferLength;
1942
1943         // The vast majority of work is done in the shared
1944         // sxg_dumb_sgl routine.
1945         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DumbSend",
1946                   adapter, skb, 0, 0);
1947
1948         // Allocate a SGL buffer
1949         SXG_GET_SGL_BUFFER(adapter, SxgSgl);
1950         if (!SxgSgl) {
1951                 adapter->Stats.NoSglBuf++;
1952                 adapter->Stats.XmtErrors++;
1953                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "SndPktF1",
1954                           adapter, skb, 0, 0);
1955                 return (STATUS_RESOURCES);
1956         }
1957         ASSERT(SxgSgl->adapter == adapter);
1958         SglBuffer = SXG_SGL_BUFFER(SxgSgl);
1959         SglBufferLength = SXG_SGL_BUF_SIZE;
1960         SxgSgl->VlanTag.VlanTci = 0;
1961         SxgSgl->VlanTag.VlanTpid = 0;
1962         SxgSgl->Type = SXG_SGL_DUMB;
1963         SxgSgl->DumbPacket = skb;
1964         pSgl = NULL;
1965
1966         // Call the common sxg_dumb_sgl routine to complete the send.
1967         sxg_dumb_sgl(pSgl, SxgSgl);
1968         // Return success   sxg_dumb_sgl (or something later) will complete it.
1969         return (STATUS_SUCCESS);
1970 }
1971
1972 /*
1973  * sxg_dumb_sgl
1974  *
1975  * Arguments:
1976  *              pSgl     -
1977  *              SxgSgl   - SXG_SCATTER_GATHER
1978  *
1979  * Return Value:
1980  *      None.
1981  */
1982 static void sxg_dumb_sgl(PSCATTER_GATHER_LIST pSgl, PSXG_SCATTER_GATHER SxgSgl)
1983 {
1984         p_adapter_t adapter = SxgSgl->adapter;
1985         struct sk_buff *skb = SxgSgl->DumbPacket;
1986         // For now, all dumb-nic sends go on RSS queue zero
1987         PSXG_XMT_RING XmtRing = &adapter->XmtRings[0];
1988         PSXG_RING_INFO XmtRingInfo = &adapter->XmtRingZeroInfo;
1989         PSXG_CMD XmtCmd = NULL;
1990 //      u32                         Index = 0;
1991         u32 DataLength = skb->len;
1992 //  unsigned int                                BufLen;
1993 //      u32                         SglOffset;
1994         u64 phys_addr;
1995
1996         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DumbSgl",
1997                   pSgl, SxgSgl, 0, 0);
1998
1999         // Set aside a pointer to the sgl
2000         SxgSgl->pSgl = pSgl;
2001
2002         // Sanity check that our SGL format is as we expect.
2003         ASSERT(sizeof(SXG_X64_SGE) == sizeof(SCATTER_GATHER_ELEMENT));
2004         // Shouldn't be a vlan tag on this frame
2005         ASSERT(SxgSgl->VlanTag.VlanTci == 0);
2006         ASSERT(SxgSgl->VlanTag.VlanTpid == 0);
2007
2008         // From here below we work with the SGL placed in our
2009         // buffer.
2010
2011         SxgSgl->Sgl.NumberOfElements = 1;
2012
2013         // Grab the spinlock and acquire a command
2014         spin_lock(&adapter->XmtZeroLock);
2015         SXG_GET_CMD(XmtRing, XmtRingInfo, XmtCmd, SxgSgl);
2016         if (XmtCmd == NULL) {
2017                 // Call sxg_complete_slow_send to see if we can
2018                 // free up any XmtRingZero entries and then try again
2019                 spin_unlock(&adapter->XmtZeroLock);
2020                 sxg_complete_slow_send(adapter);
2021                 spin_lock(&adapter->XmtZeroLock);
2022                 SXG_GET_CMD(XmtRing, XmtRingInfo, XmtCmd, SxgSgl);
2023                 if (XmtCmd == NULL) {
2024                         adapter->Stats.XmtZeroFull++;
2025                         goto abortcmd;
2026                 }
2027         }
2028         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DumbCmd",
2029                   XmtCmd, XmtRingInfo->Head, XmtRingInfo->Tail, 0);
2030         // Update stats
2031         adapter->Stats.DumbXmtPkts++;
2032         adapter->Stats.DumbXmtBytes += DataLength;
2033 #if XXXTODO                     // Stats stuff
2034         if (SXG_MULTICAST_PACKET(EtherHdr)) {
2035                 if (SXG_BROADCAST_PACKET(EtherHdr)) {
2036                         adapter->Stats.DumbXmtBcastPkts++;
2037                         adapter->Stats.DumbXmtBcastBytes += DataLength;
2038                 } else {
2039                         adapter->Stats.DumbXmtMcastPkts++;
2040                         adapter->Stats.DumbXmtMcastBytes += DataLength;
2041                 }
2042         } else {
2043                 adapter->Stats.DumbXmtUcastPkts++;
2044                 adapter->Stats.DumbXmtUcastBytes += DataLength;
2045         }
2046 #endif
2047         // Fill in the command
2048         // Copy out the first SGE to the command and adjust for offset
2049         phys_addr =
2050             pci_map_single(adapter->pcidev, skb->data, skb->len,
2051                            PCI_DMA_TODEVICE);
2052         XmtCmd->Buffer.FirstSgeAddress = SXG_GET_ADDR_HIGH(phys_addr);
2053         XmtCmd->Buffer.FirstSgeAddress = XmtCmd->Buffer.FirstSgeAddress << 32;
2054         XmtCmd->Buffer.FirstSgeAddress =
2055             XmtCmd->Buffer.FirstSgeAddress | SXG_GET_ADDR_LOW(phys_addr);
2056 //      XmtCmd->Buffer.FirstSgeAddress = SxgSgl->Sgl.Elements[Index].Address;
2057 //      XmtCmd->Buffer.FirstSgeAddress.LowPart += MdlOffset;
2058         XmtCmd->Buffer.FirstSgeLength = DataLength;
2059         // Set a pointer to the remaining SGL entries
2060 //      XmtCmd->Sgl = SxgSgl->PhysicalAddress;
2061         // Advance the physical address of the SxgSgl structure to
2062         // the second SGE
2063 //      SglOffset = (u32)((u32 *)(&SxgSgl->Sgl.Elements[Index+1]) -
2064 //                                              (u32 *)SxgSgl);
2065 //      XmtCmd->Sgl.LowPart += SglOffset;
2066         XmtCmd->Buffer.SgeOffset = 0;
2067         // Note - TotalLength might be overwritten with MSS below..
2068         XmtCmd->Buffer.TotalLength = DataLength;
2069         XmtCmd->SgEntries = 1;  //(ushort)(SxgSgl->Sgl.NumberOfElements - Index);
2070         XmtCmd->Flags = 0;
2071         //
2072         // Advance transmit cmd descripter by 1.
2073         // NOTE - See comments in SxgTcpOutput where we write
2074         // to the XmtCmd register regarding CPU ID values and/or
2075         // multiple commands.
2076         //
2077         //
2078         WRITE_REG(adapter->UcodeRegs[0].XmtCmd, 1, TRUE);
2079         //
2080         //
2081         adapter->Stats.XmtQLen++;       // Stats within lock
2082         spin_unlock(&adapter->XmtZeroLock);
2083         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XDumSgl2",
2084                   XmtCmd, pSgl, SxgSgl, 0);
2085         return;
2086
2087       abortcmd:
2088         // NOTE - Only jump to this label AFTER grabbing the
2089         // XmtZeroLock, and DO NOT DROP IT between the
2090         // command allocation and the following abort.
2091         if (XmtCmd) {
2092                 SXG_ABORT_CMD(XmtRingInfo);
2093         }
2094         spin_unlock(&adapter->XmtZeroLock);
2095
2096 // failsgl:
2097         // Jump to this label if failure occurs before the
2098         // XmtZeroLock is grabbed
2099         adapter->Stats.XmtErrors++;
2100         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_IMPORTANT, "DumSGFal",
2101                   pSgl, SxgSgl, XmtRingInfo->Head, XmtRingInfo->Tail);
2102
2103         SXG_COMPLETE_DUMB_SEND(adapter, SxgSgl->DumbPacket);    // SxgSgl->DumbPacket is the skb
2104 }
2105
2106 /***************************************************************
2107  * Link management functions
2108  ***************************************************************/
2109
2110 /*
2111  * sxg_initialize_link - Initialize the link stuff
2112  *
2113  * Arguments -
2114  *      adapter         - A pointer to our adapter structure
2115  *
2116  * Return
2117  *      status
2118  */
2119 static int sxg_initialize_link(p_adapter_t adapter)
2120 {
2121         PSXG_HW_REGS HwRegs = adapter->HwRegs;
2122         u32 Value;
2123         u32 ConfigData;
2124         u32 MaxFrame;
2125         int status;
2126
2127         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "InitLink",
2128                   adapter, 0, 0, 0);
2129
2130         // Reset PHY and XGXS module
2131         WRITE_REG(HwRegs->LinkStatus, LS_SERDES_POWER_DOWN, TRUE);
2132
2133         // Reset transmit configuration register
2134         WRITE_REG(HwRegs->XmtConfig, XMT_CONFIG_RESET, TRUE);
2135
2136         // Reset receive configuration register
2137         WRITE_REG(HwRegs->RcvConfig, RCV_CONFIG_RESET, TRUE);
2138
2139         // Reset all MAC modules
2140         WRITE_REG(HwRegs->MacConfig0, AXGMAC_CFG0_SUB_RESET, TRUE);
2141
2142         // Link address 0
2143         // XXXTODO - This assumes the MAC address (0a:0b:0c:0d:0e:0f)
2144         // is stored with the first nibble (0a) in the byte 0
2145         // of the Mac address.  Possibly reverse?
2146         Value = *(u32 *) adapter->MacAddr;
2147         WRITE_REG(HwRegs->LinkAddress0Low, Value, TRUE);
2148         // also write the MAC address to the MAC.  Endian is reversed.
2149         WRITE_REG(HwRegs->MacAddressLow, ntohl(Value), TRUE);
2150         Value = (*(u16 *) & adapter->MacAddr[4] & 0x0000FFFF);
2151         WRITE_REG(HwRegs->LinkAddress0High, Value | LINK_ADDRESS_ENABLE, TRUE);
2152         // endian swap for the MAC (put high bytes in bits [31:16], swapped)
2153         Value = ntohl(Value);
2154         WRITE_REG(HwRegs->MacAddressHigh, Value, TRUE);
2155         // Link address 1
2156         WRITE_REG(HwRegs->LinkAddress1Low, 0, TRUE);
2157         WRITE_REG(HwRegs->LinkAddress1High, 0, TRUE);
2158         // Link address 2
2159         WRITE_REG(HwRegs->LinkAddress2Low, 0, TRUE);
2160         WRITE_REG(HwRegs->LinkAddress2High, 0, TRUE);
2161         // Link address 3
2162         WRITE_REG(HwRegs->LinkAddress3Low, 0, TRUE);
2163         WRITE_REG(HwRegs->LinkAddress3High, 0, TRUE);
2164
2165         // Enable MAC modules
2166         WRITE_REG(HwRegs->MacConfig0, 0, TRUE);
2167
2168         // Configure MAC
2169         WRITE_REG(HwRegs->MacConfig1, (AXGMAC_CFG1_XMT_PAUSE |  // Allow sending of pause
2170                                        AXGMAC_CFG1_XMT_EN |     // Enable XMT
2171                                        AXGMAC_CFG1_RCV_PAUSE |  // Enable detection of pause
2172                                        AXGMAC_CFG1_RCV_EN |     // Enable receive
2173                                        AXGMAC_CFG1_SHORT_ASSERT |       // short frame detection
2174                                        AXGMAC_CFG1_CHECK_LEN |  // Verify frame length
2175                                        AXGMAC_CFG1_GEN_FCS |    // Generate FCS
2176                                        AXGMAC_CFG1_PAD_64),     // Pad frames to 64 bytes
2177                   TRUE);
2178
2179         // Set AXGMAC max frame length if jumbo.  Not needed for standard MTU
2180         if (adapter->JumboEnabled) {
2181                 WRITE_REG(HwRegs->MacMaxFrameLen, AXGMAC_MAXFRAME_JUMBO, TRUE);
2182         }
2183         // AMIIM Configuration Register -
2184         // The value placed in the AXGMAC_AMIIM_CFG_HALF_CLOCK portion
2185         // (bottom bits) of this register is used to determine the
2186         // MDC frequency as specified in the A-XGMAC Design Document.
2187         // This value must not be zero.  The following value (62 or 0x3E)
2188         // is based on our MAC transmit clock frequency (MTCLK) of 312.5 MHz.
2189         // Given a maximum MDIO clock frequency of 2.5 MHz (see the PHY spec),
2190         // we get:  312.5/(2*(X+1)) < 2.5  ==> X = 62.
2191         // This value happens to be the default value for this register,
2192         // so we really don't have to do this.
2193         WRITE_REG(HwRegs->MacAmiimConfig, 0x0000003E, TRUE);
2194
2195         // Power up and enable PHY and XAUI/XGXS/Serdes logic
2196         WRITE_REG(HwRegs->LinkStatus,
2197                   (LS_PHY_CLR_RESET |
2198                    LS_XGXS_ENABLE |
2199                    LS_XGXS_CTL | LS_PHY_CLK_EN | LS_ATTN_ALARM), TRUE);
2200         DBG_ERROR("After Power Up and enable PHY in sxg_initialize_link\n");
2201
2202         // Per information given by Aeluros, wait 100 ms after removing reset.
2203         // It's not enough to wait for the self-clearing reset bit in reg 0 to clear.
2204         mdelay(100);
2205
2206         // Verify the PHY has come up by checking that the Reset bit has cleared.
2207         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PMA,   // PHY PMA/PMD module
2208                                    PHY_PMA_CONTROL1,    // PMA/PMD control register
2209                                    &Value);
2210         if (status != STATUS_SUCCESS)
2211                 return (STATUS_FAILURE);
2212         if (Value & PMA_CONTROL1_RESET) // reset complete if bit is 0
2213                 return (STATUS_FAILURE);
2214
2215         // The SERDES should be initialized by now - confirm
2216         READ_REG(HwRegs->LinkStatus, Value);
2217         if (Value & LS_SERDES_DOWN)     // verify SERDES is initialized
2218                 return (STATUS_FAILURE);
2219
2220         // The XAUI link should also be up - confirm
2221         if (!(Value & LS_XAUI_LINK_UP)) // verify XAUI link is up
2222                 return (STATUS_FAILURE);
2223
2224         // Initialize the PHY
2225         status = sxg_phy_init(adapter);
2226         if (status != STATUS_SUCCESS)
2227                 return (STATUS_FAILURE);
2228
2229         // Enable the Link Alarm
2230         status = sxg_write_mdio_reg(adapter, MIIM_DEV_PHY_PMA,  // PHY PMA/PMD module
2231                                     LASI_CONTROL,       // LASI control register
2232                                     LASI_CTL_LS_ALARM_ENABLE);  // enable link alarm bit
2233         if (status != STATUS_SUCCESS)
2234                 return (STATUS_FAILURE);
2235
2236         // XXXTODO - temporary - verify bit is set
2237         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PMA,   // PHY PMA/PMD module
2238                                    LASI_CONTROL,        // LASI control register
2239                                    &Value);
2240         if (status != STATUS_SUCCESS)
2241                 return (STATUS_FAILURE);
2242         if (!(Value & LASI_CTL_LS_ALARM_ENABLE)) {
2243                 DBG_ERROR("Error!  LASI Control Alarm Enable bit not set!\n");
2244         }
2245         // Enable receive
2246         MaxFrame = adapter->JumboEnabled ? JUMBOMAXFRAME : ETHERMAXFRAME;
2247         ConfigData = (RCV_CONFIG_ENABLE |
2248                       RCV_CONFIG_ENPARSE |
2249                       RCV_CONFIG_RCVBAD |
2250                       RCV_CONFIG_RCVPAUSE |
2251                       RCV_CONFIG_TZIPV6 |
2252                       RCV_CONFIG_TZIPV4 |
2253                       RCV_CONFIG_HASH_16 |
2254                       RCV_CONFIG_SOCKET | RCV_CONFIG_BUFSIZE(MaxFrame));
2255         WRITE_REG(HwRegs->RcvConfig, ConfigData, TRUE);
2256
2257         WRITE_REG(HwRegs->XmtConfig, XMT_CONFIG_ENABLE, TRUE);
2258
2259         // Mark the link as down.  We'll get a link event when it comes up.
2260         sxg_link_state(adapter, SXG_LINK_DOWN);
2261
2262         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XInitLnk",
2263                   adapter, 0, 0, 0);
2264         return (STATUS_SUCCESS);
2265 }
2266
2267 /*
2268  * sxg_phy_init - Initialize the PHY
2269  *
2270  * Arguments -
2271  *      adapter         - A pointer to our adapter structure
2272  *
2273  * Return
2274  *      status
2275  */
2276 static int sxg_phy_init(p_adapter_t adapter)
2277 {
2278         u32 Value;
2279         PPHY_UCODE p;
2280         int status;
2281
2282         DBG_ERROR("ENTER %s\n", __FUNCTION__);
2283
2284         // Read a register to identify the PHY type
2285         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PMA,   // PHY PMA/PMD module
2286                                    0xC205,      // PHY ID register (?)
2287                                    &Value);     //    XXXTODO - add def
2288         if (status != STATUS_SUCCESS)
2289                 return (STATUS_FAILURE);
2290
2291         if (Value == 0x0012) {  // 0x0012 == AEL2005C PHY(?) - XXXTODO - add def
2292                 DBG_ERROR
2293                     ("AEL2005C PHY detected.  Downloading PHY microcode.\n");
2294
2295                 // Initialize AEL2005C PHY and download PHY microcode
2296                 for (p = PhyUcode; p->Addr != 0xFFFF; p++) {
2297                         if (p->Addr == 0) {
2298                                 // if address == 0, data == sleep time in ms
2299                                 mdelay(p->Data);
2300                         } else {
2301                                 // write the given data to the specified address
2302                                 status = sxg_write_mdio_reg(adapter, MIIM_DEV_PHY_PMA,  // PHY PMA/PMD module
2303                                                             p->Addr,    // PHY address
2304                                                             p->Data);   // PHY data
2305                                 if (status != STATUS_SUCCESS)
2306                                         return (STATUS_FAILURE);
2307                         }
2308                 }
2309         }
2310         DBG_ERROR("EXIT %s\n", __FUNCTION__);
2311
2312         return (STATUS_SUCCESS);
2313 }
2314
2315 /*
2316  * sxg_link_event - Process a link event notification from the card
2317  *
2318  * Arguments -
2319  *      adapter         - A pointer to our adapter structure
2320  *
2321  * Return
2322  *      None
2323  */
2324 static void sxg_link_event(p_adapter_t adapter)
2325 {
2326         PSXG_HW_REGS HwRegs = adapter->HwRegs;
2327         SXG_LINK_STATE LinkState;
2328         int status;
2329         u32 Value;
2330
2331         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "LinkEvnt",
2332                   adapter, 0, 0, 0);
2333         DBG_ERROR("ENTER %s\n", __FUNCTION__);
2334
2335         // Check the Link Status register.  We should have a Link Alarm.
2336         READ_REG(HwRegs->LinkStatus, Value);
2337         if (Value & LS_LINK_ALARM) {
2338                 // We got a Link Status alarm.  First, pause to let the
2339                 // link state settle (it can bounce a number of times)
2340                 mdelay(10);
2341
2342                 // Now clear the alarm by reading the LASI status register.
2343                 status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PMA,   // PHY PMA/PMD module
2344                                            LASI_STATUS, // LASI status register
2345                                            &Value);
2346                 if (status != STATUS_SUCCESS) {
2347                         DBG_ERROR("Error reading LASI Status MDIO register!\n");
2348                         sxg_link_state(adapter, SXG_LINK_DOWN);
2349 //                      ASSERT(0);
2350                 }
2351                 ASSERT(Value & LASI_STATUS_LS_ALARM);
2352
2353                 // Now get and set the link state
2354                 LinkState = sxg_get_link_state(adapter);
2355                 sxg_link_state(adapter, LinkState);
2356                 DBG_ERROR("SXG: Link Alarm occurred.  Link is %s\n",
2357                           ((LinkState == SXG_LINK_UP) ? "UP" : "DOWN"));
2358         } else {
2359                 // XXXTODO - Assuming Link Attention is only being generated for the
2360                 // Link Alarm pin (and not for a XAUI Link Status change), then it's
2361                 // impossible to get here.  Yet we've gotten here twice (under extreme
2362                 // conditions - bouncing the link up and down many times a second).
2363                 // Needs further investigation.
2364                 DBG_ERROR("SXG: sxg_link_event: Can't get here!\n");
2365                 DBG_ERROR("SXG: Link Status == 0x%08X.\n", Value);
2366 //              ASSERT(0);
2367         }
2368         DBG_ERROR("EXIT %s\n", __FUNCTION__);
2369
2370 }
2371
2372 /*
2373  * sxg_get_link_state - Determine if the link is up or down
2374  *
2375  * Arguments -
2376  *      adapter         - A pointer to our adapter structure
2377  *
2378  * Return
2379  *      Link State
2380  */
2381 static SXG_LINK_STATE sxg_get_link_state(p_adapter_t adapter)
2382 {
2383         int status;
2384         u32 Value;
2385
2386         DBG_ERROR("ENTER %s\n", __FUNCTION__);
2387
2388         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "GetLink",
2389                   adapter, 0, 0, 0);
2390
2391         // Per the Xenpak spec (and the IEEE 10Gb spec?), the link is up if
2392         // the following 3 bits (from 3 different MDIO registers) are all true.
2393         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PMA,   // PHY PMA/PMD module
2394                                    PHY_PMA_RCV_DET,     // PMA/PMD Receive Signal Detect register
2395                                    &Value);
2396         if (status != STATUS_SUCCESS)
2397                 goto bad;
2398
2399         // If PMA/PMD receive signal detect is 0, then the link is down
2400         if (!(Value & PMA_RCV_DETECT))
2401                 return (SXG_LINK_DOWN);
2402
2403         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_PCS,   // PHY PCS module
2404                                    PHY_PCS_10G_STATUS1, // PCS 10GBASE-R Status 1 register
2405                                    &Value);
2406         if (status != STATUS_SUCCESS)
2407                 goto bad;
2408
2409         // If PCS is not locked to receive blocks, then the link is down
2410         if (!(Value & PCS_10B_BLOCK_LOCK))
2411                 return (SXG_LINK_DOWN);
2412
2413         status = sxg_read_mdio_reg(adapter, MIIM_DEV_PHY_XS,    // PHY XS module
2414                                    PHY_XS_LANE_STATUS,  // XS Lane Status register
2415                                    &Value);
2416         if (status != STATUS_SUCCESS)
2417                 goto bad;
2418
2419         // If XS transmit lanes are not aligned, then the link is down
2420         if (!(Value & XS_LANE_ALIGN))
2421                 return (SXG_LINK_DOWN);
2422
2423         // All 3 bits are true, so the link is up
2424         DBG_ERROR("EXIT %s\n", __FUNCTION__);
2425
2426         return (SXG_LINK_UP);
2427
2428       bad:
2429         // An error occurred reading an MDIO register.  This shouldn't happen.
2430         DBG_ERROR("Error reading an MDIO register!\n");
2431         ASSERT(0);
2432         return (SXG_LINK_DOWN);
2433 }
2434
2435 static void sxg_indicate_link_state(p_adapter_t adapter,
2436                                     SXG_LINK_STATE LinkState)
2437 {
2438         if (adapter->LinkState == SXG_LINK_UP) {
2439                 DBG_ERROR("%s: LINK now UP, call netif_start_queue\n",
2440                           __FUNCTION__);
2441                 netif_start_queue(adapter->netdev);
2442         } else {
2443                 DBG_ERROR("%s: LINK now DOWN, call netif_stop_queue\n",
2444                           __FUNCTION__);
2445                 netif_stop_queue(adapter->netdev);
2446         }
2447 }
2448
2449 /*
2450  * sxg_link_state - Set the link state and if necessary, indicate.
2451  *      This routine the central point of processing for all link state changes.
2452  *      Nothing else in the driver should alter the link state or perform
2453  *      link state indications
2454  *
2455  * Arguments -
2456  *      adapter         - A pointer to our adapter structure
2457  *      LinkState       - The link state
2458  *
2459  * Return
2460  *      None
2461  */
2462 static void sxg_link_state(p_adapter_t adapter, SXG_LINK_STATE LinkState)
2463 {
2464         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_IMPORTANT, "LnkINDCT",
2465                   adapter, LinkState, adapter->LinkState, adapter->State);
2466
2467         DBG_ERROR("ENTER %s\n", __FUNCTION__);
2468
2469         // Hold the adapter lock during this routine.  Maybe move
2470         // the lock to the caller.
2471         spin_lock(&adapter->AdapterLock);
2472         if (LinkState == adapter->LinkState) {
2473                 // Nothing changed..
2474                 spin_unlock(&adapter->AdapterLock);
2475                 DBG_ERROR("EXIT #0 %s\n", __FUNCTION__);
2476                 return;
2477         }
2478         // Save the adapter state
2479         adapter->LinkState = LinkState;
2480
2481         // Drop the lock and indicate link state
2482         spin_unlock(&adapter->AdapterLock);
2483         DBG_ERROR("EXIT #1 %s\n", __FUNCTION__);
2484
2485         sxg_indicate_link_state(adapter, LinkState);
2486 }
2487
2488 /*
2489  * sxg_write_mdio_reg - Write to a register on the MDIO bus
2490  *
2491  * Arguments -
2492  *      adapter         - A pointer to our adapter structure
2493  *  DevAddr     - MDIO device number being addressed
2494  *  RegAddr     - register address for the specified MDIO device
2495  *  Value               - value to write to the MDIO register
2496  *
2497  * Return
2498  *      status
2499  */
2500 static int sxg_write_mdio_reg(p_adapter_t adapter,
2501                               u32 DevAddr, u32 RegAddr, u32 Value)
2502 {
2503         PSXG_HW_REGS HwRegs = adapter->HwRegs;
2504         u32 AddrOp;             // Address operation (written to MIIM field reg)
2505         u32 WriteOp;            // Write operation (written to MIIM field reg)
2506         u32 Cmd;                // Command (written to MIIM command reg)
2507         u32 ValueRead;
2508         u32 Timeout;
2509
2510 //  DBG_ERROR("ENTER %s\n", __FUNCTION__);
2511
2512         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "WrtMDIO",
2513                   adapter, 0, 0, 0);
2514
2515         // Ensure values don't exceed field width
2516         DevAddr &= 0x001F;      // 5-bit field
2517         RegAddr &= 0xFFFF;      // 16-bit field
2518         Value &= 0xFFFF;        // 16-bit field
2519
2520         // Set MIIM field register bits for an MIIM address operation
2521         AddrOp = (MIIM_PORT_NUM << AXGMAC_AMIIM_FIELD_PORT_SHIFT) |
2522             (DevAddr << AXGMAC_AMIIM_FIELD_DEV_SHIFT) |
2523             (MIIM_TA_10GB << AXGMAC_AMIIM_FIELD_TA_SHIFT) |
2524             (MIIM_OP_ADDR << AXGMAC_AMIIM_FIELD_OP_SHIFT) | RegAddr;
2525
2526         // Set MIIM field register bits for an MIIM write operation
2527         WriteOp = (MIIM_PORT_NUM << AXGMAC_AMIIM_FIELD_PORT_SHIFT) |
2528             (DevAddr << AXGMAC_AMIIM_FIELD_DEV_SHIFT) |
2529             (MIIM_TA_10GB << AXGMAC_AMIIM_FIELD_TA_SHIFT) |
2530             (MIIM_OP_WRITE << AXGMAC_AMIIM_FIELD_OP_SHIFT) | Value;
2531
2532         // Set MIIM command register bits to execute an MIIM command
2533         Cmd = AXGMAC_AMIIM_CMD_START | AXGMAC_AMIIM_CMD_10G_OPERATION;
2534
2535         // Reset the command register command bit (in case it's not 0)
2536         WRITE_REG(HwRegs->MacAmiimCmd, 0, TRUE);
2537
2538         // MIIM write to set the address of the specified MDIO register
2539         WRITE_REG(HwRegs->MacAmiimField, AddrOp, TRUE);
2540
2541         // Write to MIIM Command Register to execute to address operation
2542         WRITE_REG(HwRegs->MacAmiimCmd, Cmd, TRUE);
2543
2544         // Poll AMIIM Indicator register to wait for completion
2545         Timeout = SXG_LINK_TIMEOUT;
2546         do {
2547                 udelay(100);    // Timeout in 100us units
2548                 READ_REG(HwRegs->MacAmiimIndicator, ValueRead);
2549                 if (--Timeout == 0) {
2550                         return (STATUS_FAILURE);
2551                 }
2552         } while (ValueRead & AXGMAC_AMIIM_INDC_BUSY);
2553
2554         // Reset the command register command bit
2555         WRITE_REG(HwRegs->MacAmiimCmd, 0, TRUE);
2556
2557         // MIIM write to set up an MDIO write operation
2558         WRITE_REG(HwRegs->MacAmiimField, WriteOp, TRUE);
2559
2560         // Write to MIIM Command Register to execute the write operation
2561         WRITE_REG(HwRegs->MacAmiimCmd, Cmd, TRUE);
2562
2563         // Poll AMIIM Indicator register to wait for completion
2564         Timeout = SXG_LINK_TIMEOUT;
2565         do {
2566                 udelay(100);    // Timeout in 100us units
2567                 READ_REG(HwRegs->MacAmiimIndicator, ValueRead);
2568                 if (--Timeout == 0) {
2569                         return (STATUS_FAILURE);
2570                 }
2571         } while (ValueRead & AXGMAC_AMIIM_INDC_BUSY);
2572
2573 //  DBG_ERROR("EXIT %s\n", __FUNCTION__);
2574
2575         return (STATUS_SUCCESS);
2576 }
2577
2578 /*
2579  * sxg_read_mdio_reg - Read a register on the MDIO bus
2580  *
2581  * Arguments -
2582  *      adapter         - A pointer to our adapter structure
2583  *  DevAddr     - MDIO device number being addressed
2584  *  RegAddr     - register address for the specified MDIO device
2585  *  pValue              - pointer to where to put data read from the MDIO register
2586  *
2587  * Return
2588  *      status
2589  */
2590 static int sxg_read_mdio_reg(p_adapter_t adapter,
2591                              u32 DevAddr, u32 RegAddr, u32 *pValue)
2592 {
2593         PSXG_HW_REGS HwRegs = adapter->HwRegs;
2594         u32 AddrOp;             // Address operation (written to MIIM field reg)
2595         u32 ReadOp;             // Read operation (written to MIIM field reg)
2596         u32 Cmd;                // Command (written to MIIM command reg)
2597         u32 ValueRead;
2598         u32 Timeout;
2599
2600         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "WrtMDIO",
2601                   adapter, 0, 0, 0);
2602 //  DBG_ERROR("ENTER %s\n", __FUNCTION__);
2603
2604         // Ensure values don't exceed field width
2605         DevAddr &= 0x001F;      // 5-bit field
2606         RegAddr &= 0xFFFF;      // 16-bit field
2607
2608         // Set MIIM field register bits for an MIIM address operation
2609         AddrOp = (MIIM_PORT_NUM << AXGMAC_AMIIM_FIELD_PORT_SHIFT) |
2610             (DevAddr << AXGMAC_AMIIM_FIELD_DEV_SHIFT) |
2611             (MIIM_TA_10GB << AXGMAC_AMIIM_FIELD_TA_SHIFT) |
2612             (MIIM_OP_ADDR << AXGMAC_AMIIM_FIELD_OP_SHIFT) | RegAddr;
2613
2614         // Set MIIM field register bits for an MIIM read operation
2615         ReadOp = (MIIM_PORT_NUM << AXGMAC_AMIIM_FIELD_PORT_SHIFT) |
2616             (DevAddr << AXGMAC_AMIIM_FIELD_DEV_SHIFT) |
2617             (MIIM_TA_10GB << AXGMAC_AMIIM_FIELD_TA_SHIFT) |
2618             (MIIM_OP_READ << AXGMAC_AMIIM_FIELD_OP_SHIFT);
2619
2620         // Set MIIM command register bits to execute an MIIM command
2621         Cmd = AXGMAC_AMIIM_CMD_START | AXGMAC_AMIIM_CMD_10G_OPERATION;
2622
2623         // Reset the command register command bit (in case it's not 0)
2624         WRITE_REG(HwRegs->MacAmiimCmd, 0, TRUE);
2625
2626         // MIIM write to set the address of the specified MDIO register
2627         WRITE_REG(HwRegs->MacAmiimField, AddrOp, TRUE);
2628
2629         // Write to MIIM Command Register to execute to address operation
2630         WRITE_REG(HwRegs->MacAmiimCmd, Cmd, TRUE);
2631
2632         // Poll AMIIM Indicator register to wait for completion
2633         Timeout = SXG_LINK_TIMEOUT;
2634         do {
2635                 udelay(100);    // Timeout in 100us units
2636                 READ_REG(HwRegs->MacAmiimIndicator, ValueRead);
2637                 if (--Timeout == 0) {
2638                         return (STATUS_FAILURE);
2639                 }
2640         } while (ValueRead & AXGMAC_AMIIM_INDC_BUSY);
2641
2642         // Reset the command register command bit
2643         WRITE_REG(HwRegs->MacAmiimCmd, 0, TRUE);
2644
2645         // MIIM write to set up an MDIO register read operation
2646         WRITE_REG(HwRegs->MacAmiimField, ReadOp, TRUE);
2647
2648         // Write to MIIM Command Register to execute the read operation
2649         WRITE_REG(HwRegs->MacAmiimCmd, Cmd, TRUE);
2650
2651         // Poll AMIIM Indicator register to wait for completion
2652         Timeout = SXG_LINK_TIMEOUT;
2653         do {
2654                 udelay(100);    // Timeout in 100us units
2655                 READ_REG(HwRegs->MacAmiimIndicator, ValueRead);
2656                 if (--Timeout == 0) {
2657                         return (STATUS_FAILURE);
2658                 }
2659         } while (ValueRead & AXGMAC_AMIIM_INDC_BUSY);
2660
2661         // Read the MDIO register data back from the field register
2662         READ_REG(HwRegs->MacAmiimField, *pValue);
2663         *pValue &= 0xFFFF;      // data is in the lower 16 bits
2664
2665 //  DBG_ERROR("EXIT %s\n", __FUNCTION__);
2666
2667         return (STATUS_SUCCESS);
2668 }
2669
2670 /*
2671  *  Allocate a mcast_address structure to hold the multicast address.
2672  *  Link it in.
2673  */
2674 static int sxg_mcast_add_list(p_adapter_t adapter, char *address)
2675 {
2676         p_mcast_address_t mcaddr, mlist;
2677         bool equaladdr;
2678
2679         /* Check to see if it already exists */
2680         mlist = adapter->mcastaddrs;
2681         while (mlist) {
2682                 ETHER_EQ_ADDR(mlist->address, address, equaladdr);
2683                 if (equaladdr) {
2684                         return (STATUS_SUCCESS);
2685                 }
2686                 mlist = mlist->next;
2687         }
2688
2689         /* Doesn't already exist.  Allocate a structure to hold it */
2690         mcaddr = kmalloc(sizeof(mcast_address_t), GFP_ATOMIC);
2691         if (mcaddr == NULL)
2692                 return 1;
2693
2694         memcpy(mcaddr->address, address, 6);
2695
2696         mcaddr->next = adapter->mcastaddrs;
2697         adapter->mcastaddrs = mcaddr;
2698
2699         return (STATUS_SUCCESS);
2700 }
2701
2702 /*
2703  * Functions to obtain the CRC corresponding to the destination mac address.
2704  * This is a standard ethernet CRC in that it is a 32-bit, reflected CRC using
2705  * the polynomial:
2706  *   x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1.
2707  *
2708  * After the CRC for the 6 bytes is generated (but before the value is complemented),
2709  * we must then transpose the value and return bits 30-23.
2710  *
2711  */
2712 static u32 sxg_crc_table[256];  /* Table of CRC's for all possible byte values */
2713 static u32 sxg_crc_init;        /* Is table initialized                        */
2714
2715 /*
2716  *  Contruct the CRC32 table
2717  */
2718 static void sxg_mcast_init_crc32(void)
2719 {
2720         u32 c;                  /*  CRC shit reg                 */
2721         u32 e = 0;              /*  Poly X-or pattern            */
2722         int i;                  /*  counter                      */
2723         int k;                  /*  byte being shifted into crc  */
2724
2725         static int p[] = { 0, 1, 2, 4, 5, 7, 8, 10, 11, 12, 16, 22, 23, 26 };
2726
2727         for (i = 0; i < sizeof(p) / sizeof(int); i++) {
2728                 e |= 1L << (31 - p[i]);
2729         }
2730
2731         for (i = 1; i < 256; i++) {
2732                 c = i;
2733                 for (k = 8; k; k--) {
2734                         c = c & 1 ? (c >> 1) ^ e : c >> 1;
2735                 }
2736                 sxg_crc_table[i] = c;
2737         }
2738 }
2739
2740 /*
2741  *  Return the MAC hast as described above.
2742  */
2743 static unsigned char sxg_mcast_get_mac_hash(char *macaddr)
2744 {
2745         u32 crc;
2746         char *p;
2747         int i;
2748         unsigned char machash = 0;
2749
2750         if (!sxg_crc_init) {
2751                 sxg_mcast_init_crc32();
2752                 sxg_crc_init = 1;
2753         }
2754
2755         crc = 0xFFFFFFFF;       /* Preload shift register, per crc-32 spec */
2756         for (i = 0, p = macaddr; i < 6; ++p, ++i) {
2757                 crc = (crc >> 8) ^ sxg_crc_table[(crc ^ *p) & 0xFF];
2758         }
2759
2760         /* Return bits 1-8, transposed */
2761         for (i = 1; i < 9; i++) {
2762                 machash |= (((crc >> i) & 1) << (8 - i));
2763         }
2764
2765         return (machash);
2766 }
2767
2768 static void sxg_mcast_set_bit(p_adapter_t adapter, char *address)
2769 {
2770         unsigned char crcpoly;
2771
2772         /* Get the CRC polynomial for the mac address */
2773         crcpoly = sxg_mcast_get_mac_hash(address);
2774
2775         /* We only have space on the SLIC for 64 entries.  Lop
2776          * off the top two bits. (2^6 = 64)
2777          */
2778         crcpoly &= 0x3F;
2779
2780         /* OR in the new bit into our 64 bit mask. */
2781         adapter->MulticastMask |= (u64) 1 << crcpoly;
2782 }
2783
2784 static void sxg_mcast_set_list(p_net_device dev)
2785 {
2786 #if XXXTODO
2787         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
2788         int status = STATUS_SUCCESS;
2789         int i;
2790         char *addresses;
2791         struct dev_mc_list *mc_list = dev->mc_list;
2792         int mc_count = dev->mc_count;
2793
2794         ASSERT(adapter);
2795
2796         for (i = 1; i <= mc_count; i++) {
2797                 addresses = (char *)&mc_list->dmi_addr;
2798                 if (mc_list->dmi_addrlen == 6) {
2799                         status = sxg_mcast_add_list(adapter, addresses);
2800                         if (status != STATUS_SUCCESS) {
2801                                 break;
2802                         }
2803                 } else {
2804                         status = -EINVAL;
2805                         break;
2806                 }
2807                 sxg_mcast_set_bit(adapter, addresses);
2808                 mc_list = mc_list->next;
2809         }
2810
2811         DBG_ERROR("%s a->devflags_prev[%x] dev->flags[%x] status[%x]\n",
2812                   __FUNCTION__, adapter->devflags_prev, dev->flags, status);
2813         if (adapter->devflags_prev != dev->flags) {
2814                 adapter->macopts = MAC_DIRECTED;
2815                 if (dev->flags) {
2816                         if (dev->flags & IFF_BROADCAST) {
2817                                 adapter->macopts |= MAC_BCAST;
2818                         }
2819                         if (dev->flags & IFF_PROMISC) {
2820                                 adapter->macopts |= MAC_PROMISC;
2821                         }
2822                         if (dev->flags & IFF_ALLMULTI) {
2823                                 adapter->macopts |= MAC_ALLMCAST;
2824                         }
2825                         if (dev->flags & IFF_MULTICAST) {
2826                                 adapter->macopts |= MAC_MCAST;
2827                         }
2828                 }
2829                 adapter->devflags_prev = dev->flags;
2830                 DBG_ERROR("%s call sxg_config_set adapter->macopts[%x]\n",
2831                           __FUNCTION__, adapter->macopts);
2832                 sxg_config_set(adapter, TRUE);
2833         } else {
2834                 if (status == STATUS_SUCCESS) {
2835                         sxg_mcast_set_mask(adapter);
2836                 }
2837         }
2838 #endif
2839         return;
2840 }
2841
2842 static void sxg_mcast_set_mask(p_adapter_t adapter)
2843 {
2844         PSXG_UCODE_REGS sxg_regs = adapter->UcodeRegs;
2845
2846         DBG_ERROR("%s ENTER (%s) macopts[%x] mask[%llx]\n", __FUNCTION__,
2847                   adapter->netdev->name, (unsigned int)adapter->MacFilter,
2848                   adapter->MulticastMask);
2849
2850         if (adapter->MacFilter & (MAC_ALLMCAST | MAC_PROMISC)) {
2851                 /* Turn on all multicast addresses. We have to do this for promiscuous
2852                  * mode as well as ALLMCAST mode.  It saves the Microcode from having
2853                  * to keep state about the MAC configuration.
2854                  */
2855 //              DBG_ERROR("sxg: %s macopts = MAC_ALLMCAST | MAC_PROMISC\n      SLUT MODE!!!\n",__FUNCTION__);
2856                 WRITE_REG(sxg_regs->McastLow, 0xFFFFFFFF, FLUSH);
2857                 WRITE_REG(sxg_regs->McastHigh, 0xFFFFFFFF, FLUSH);
2858 //        DBG_ERROR("%s (%s) WRITE to slic_regs slic_mcastlow&high 0xFFFFFFFF\n",__FUNCTION__, adapter->netdev->name);
2859
2860         } else {
2861                 /* Commit our multicast mast to the SLIC by writing to the multicast
2862                  * address mask registers
2863                  */
2864                 DBG_ERROR("%s (%s) WRITE mcastlow[%lx] mcasthigh[%lx]\n",
2865                           __FUNCTION__, adapter->netdev->name,
2866                           ((ulong) (adapter->MulticastMask & 0xFFFFFFFF)),
2867                           ((ulong)
2868                            ((adapter->MulticastMask >> 32) & 0xFFFFFFFF)));
2869
2870                 WRITE_REG(sxg_regs->McastLow,
2871                           (u32) (adapter->MulticastMask & 0xFFFFFFFF), FLUSH);
2872                 WRITE_REG(sxg_regs->McastHigh,
2873                           (u32) ((adapter->
2874                                   MulticastMask >> 32) & 0xFFFFFFFF), FLUSH);
2875         }
2876 }
2877
2878 static void sxg_unmap_mmio_space(p_adapter_t adapter)
2879 {
2880 #if LINUX_FREES_ADAPTER_RESOURCES
2881 //      if (adapter->Regs) {
2882 //              iounmap(adapter->Regs);
2883 //      }
2884 //      adapter->slic_regs = NULL;
2885 #endif
2886 }
2887
2888 #if XXXTODO
2889 /*
2890  * SxgFreeResources - Free everything allocated in SxgAllocateResources
2891  *
2892  * Arguments -
2893  *      adapter         - A pointer to our adapter structure
2894  *
2895  * Return
2896  *      none
2897  */
2898 void SxgFreeResources(p_adapter_t adapter)
2899 {
2900         u32 RssIds, IsrCount;
2901         PTCP_OBJECT TcpObject;
2902         u32 i;
2903         BOOLEAN TimerCancelled;
2904
2905         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "FreeRes",
2906                   adapter, adapter->MaxTcbs, 0, 0);
2907
2908         RssIds = SXG_RSS_CPU_COUNT(adapter);
2909         IsrCount = adapter->MsiEnabled ? RssIds : 1;
2910
2911         if (adapter->BasicAllocations == FALSE) {
2912                 // No allocations have been made, including spinlocks,
2913                 // or listhead initializations.  Return.
2914                 return;
2915         }
2916
2917         if (!(IsListEmpty(&adapter->AllRcvBlocks))) {
2918                 SxgFreeRcvBlocks(adapter);
2919         }
2920         if (!(IsListEmpty(&adapter->AllSglBuffers))) {
2921                 SxgFreeSglBuffers(adapter);
2922         }
2923         // Free event queues.
2924         if (adapter->EventRings) {
2925                 pci_free_consistent(adapter->pcidev,
2926                                     sizeof(SXG_EVENT_RING) * RssIds,
2927                                     adapter->EventRings, adapter->PEventRings);
2928         }
2929         if (adapter->Isr) {
2930                 pci_free_consistent(adapter->pcidev,
2931                                     sizeof(u32) * IsrCount,
2932                                     adapter->Isr, adapter->PIsr);
2933         }
2934         if (adapter->XmtRingZeroIndex) {
2935                 pci_free_consistent(adapter->pcidev,
2936                                     sizeof(u32),
2937                                     adapter->XmtRingZeroIndex,
2938                                     adapter->PXmtRingZeroIndex);
2939         }
2940         if (adapter->IndirectionTable) {
2941                 pci_free_consistent(adapter->pcidev,
2942                                     SXG_MAX_RSS_TABLE_SIZE,
2943                                     adapter->IndirectionTable,
2944                                     adapter->PIndirectionTable);
2945         }
2946
2947         SXG_FREE_PACKET_POOL(adapter->PacketPoolHandle);
2948         SXG_FREE_BUFFER_POOL(adapter->BufferPoolHandle);
2949
2950         // Unmap register spaces
2951         SxgUnmapResources(adapter);
2952
2953         // Deregister DMA
2954         if (adapter->DmaHandle) {
2955                 SXG_DEREGISTER_DMA(adapter->DmaHandle);
2956         }
2957         // Deregister interrupt
2958         SxgDeregisterInterrupt(adapter);
2959
2960         // Possibly free system info (5.2 only)
2961         SXG_RELEASE_SYSTEM_INFO(adapter);
2962
2963         SxgDiagFreeResources(adapter);
2964
2965         SxgFreeMCastAddrs(adapter);
2966
2967         if (SXG_TIMER_ALLOCATED(adapter->ResetTimer)) {
2968                 SXG_CANCEL_TIMER(adapter->ResetTimer, TimerCancelled);
2969                 SXG_FREE_TIMER(adapter->ResetTimer);
2970         }
2971         if (SXG_TIMER_ALLOCATED(adapter->RssTimer)) {
2972                 SXG_CANCEL_TIMER(adapter->RssTimer, TimerCancelled);
2973                 SXG_FREE_TIMER(adapter->RssTimer);
2974         }
2975         if (SXG_TIMER_ALLOCATED(adapter->OffloadTimer)) {
2976                 SXG_CANCEL_TIMER(adapter->OffloadTimer, TimerCancelled);
2977                 SXG_FREE_TIMER(adapter->OffloadTimer);
2978         }
2979
2980         adapter->BasicAllocations = FALSE;
2981
2982         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XFreeRes",
2983                   adapter, adapter->MaxTcbs, 0, 0);
2984 }
2985 #endif
2986
2987 /*
2988  * sxg_allocate_complete -
2989  *
2990  * This routine is called when a memory allocation has completed.
2991  *
2992  * Arguments -
2993  *      p_adapter_t     - Our adapter structure
2994  *      VirtualAddress  - Memory virtual address
2995  *      PhysicalAddress - Memory physical address
2996  *      Length          - Length of memory allocated (or 0)
2997  *      Context         - The type of buffer allocated
2998  *
2999  * Return
3000  *      None.
3001  */
3002 static void sxg_allocate_complete(p_adapter_t adapter,
3003                                   void *VirtualAddress,
3004                                   dma_addr_t PhysicalAddress,
3005                                   u32 Length, SXG_BUFFER_TYPE Context)
3006 {
3007         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AllocCmp",
3008                   adapter, VirtualAddress, Length, Context);
3009         ASSERT(adapter->AllocationsPending);
3010         --adapter->AllocationsPending;
3011
3012         switch (Context) {
3013
3014         case SXG_BUFFER_TYPE_RCV:
3015                 sxg_allocate_rcvblock_complete(adapter,
3016                                                VirtualAddress,
3017                                                PhysicalAddress, Length);
3018                 break;
3019         case SXG_BUFFER_TYPE_SGL:
3020                 sxg_allocate_sgl_buffer_complete(adapter, (PSXG_SCATTER_GATHER)
3021                                                  VirtualAddress,
3022                                                  PhysicalAddress, Length);
3023                 break;
3024         }
3025         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAlocCmp",
3026                   adapter, VirtualAddress, Length, Context);
3027 }
3028
3029 /*
3030  * sxg_allocate_buffer_memory - Shared memory allocation routine used for
3031  *              synchronous and asynchronous buffer allocations
3032  *
3033  * Arguments -
3034  *      adapter         - A pointer to our adapter structure
3035  *      Size            - block size to allocate
3036  *      BufferType      - Type of buffer to allocate
3037  *
3038  * Return
3039  *      int
3040  */
3041 static int sxg_allocate_buffer_memory(p_adapter_t adapter,
3042                                       u32 Size, SXG_BUFFER_TYPE BufferType)
3043 {
3044         int status;
3045         void *Buffer;
3046         dma_addr_t pBuffer;
3047
3048         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AllocMem",
3049                   adapter, Size, BufferType, 0);
3050         // Grab the adapter lock and check the state.
3051         // If we're in anything other than INITIALIZING or
3052         // RUNNING state, fail.  This is to prevent
3053         // allocations in an improper driver state
3054         spin_lock(&adapter->AdapterLock);
3055
3056         // Increment the AllocationsPending count while holding
3057         // the lock.  Pause processing relies on this
3058         ++adapter->AllocationsPending;
3059         spin_unlock(&adapter->AdapterLock);
3060
3061         // At initialization time allocate resources synchronously.
3062         Buffer = pci_alloc_consistent(adapter->pcidev, Size, &pBuffer);
3063         if (Buffer == NULL) {
3064                 spin_lock(&adapter->AdapterLock);
3065                 // Decrement the AllocationsPending count while holding
3066                 // the lock.  Pause processing relies on this
3067                 --adapter->AllocationsPending;
3068                 spin_unlock(&adapter->AdapterLock);
3069                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AlcMemF1",
3070                           adapter, Size, BufferType, 0);
3071                 return (STATUS_RESOURCES);
3072         }
3073         sxg_allocate_complete(adapter, Buffer, pBuffer, Size, BufferType);
3074         status = STATUS_SUCCESS;
3075
3076         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAlocMem",
3077                   adapter, Size, BufferType, status);
3078         return (status);
3079 }
3080
3081 /*
3082  * sxg_allocate_rcvblock_complete - Complete a receive descriptor block allocation
3083  *
3084  * Arguments -
3085  *      adapter                         - A pointer to our adapter structure
3086  *      RcvBlock                        - receive block virtual address
3087  *      PhysicalAddress         - Physical address
3088  *      Length                          - Memory length
3089  *
3090  * Return
3091  *
3092  */
3093 static void sxg_allocate_rcvblock_complete(p_adapter_t adapter,
3094                                            void *RcvBlock,
3095                                            dma_addr_t PhysicalAddress,
3096                                            u32 Length)
3097 {
3098         u32 i;
3099         u32 BufferSize = adapter->ReceiveBufferSize;
3100         u64 Paddr;
3101         PSXG_RCV_BLOCK_HDR RcvBlockHdr;
3102         unsigned char *RcvDataBuffer;
3103         PSXG_RCV_DATA_BUFFER_HDR RcvDataBufferHdr;
3104         PSXG_RCV_DESCRIPTOR_BLOCK RcvDescriptorBlock;
3105         PSXG_RCV_DESCRIPTOR_BLOCK_HDR RcvDescriptorBlockHdr;
3106
3107         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AlRcvBlk",
3108                   adapter, RcvBlock, Length, 0);
3109         if (RcvBlock == NULL) {
3110                 goto fail;
3111         }
3112         memset(RcvBlock, 0, Length);
3113         ASSERT((BufferSize == SXG_RCV_DATA_BUFFER_SIZE) ||
3114                (BufferSize == SXG_RCV_JUMBO_BUFFER_SIZE));
3115         ASSERT(Length == SXG_RCV_BLOCK_SIZE(BufferSize));
3116         // First, initialize the contained pool of receive data
3117         // buffers.  This initialization requires NBL/NB/MDL allocations,
3118         // If any of them fail, free the block and return without
3119         // queueing the shared memory
3120         RcvDataBuffer = RcvBlock;
3121 #if 0
3122         for (i = 0, Paddr = *PhysicalAddress;
3123              i < SXG_RCV_DESCRIPTORS_PER_BLOCK;
3124              i++, Paddr.LowPart += BufferSize, RcvDataBuffer += BufferSize)
3125 #endif
3126                 for (i = 0, Paddr = PhysicalAddress;
3127                      i < SXG_RCV_DESCRIPTORS_PER_BLOCK;
3128                      i++, Paddr += BufferSize, RcvDataBuffer += BufferSize) {
3129                         //
3130                         RcvDataBufferHdr =
3131                             (PSXG_RCV_DATA_BUFFER_HDR) (RcvDataBuffer +
3132                                                         SXG_RCV_DATA_BUFFER_HDR_OFFSET
3133                                                         (BufferSize));
3134                         RcvDataBufferHdr->VirtualAddress = RcvDataBuffer;
3135                         RcvDataBufferHdr->PhysicalAddress = Paddr;
3136                         RcvDataBufferHdr->State = SXG_BUFFER_UPSTREAM;  // For FREE macro assertion
3137                         RcvDataBufferHdr->Size =
3138                             SXG_RCV_BUFFER_DATA_SIZE(BufferSize);
3139
3140                         SXG_ALLOCATE_RCV_PACKET(adapter, RcvDataBufferHdr);
3141                         if (RcvDataBufferHdr->SxgDumbRcvPacket == NULL)
3142                                 goto fail;
3143
3144                 }
3145
3146         // Place this entire block of memory on the AllRcvBlocks queue so it can be
3147         // free later
3148         RcvBlockHdr =
3149             (PSXG_RCV_BLOCK_HDR) ((unsigned char *)RcvBlock +
3150                                   SXG_RCV_BLOCK_HDR_OFFSET(BufferSize));
3151         RcvBlockHdr->VirtualAddress = RcvBlock;
3152         RcvBlockHdr->PhysicalAddress = PhysicalAddress;
3153         spin_lock(&adapter->RcvQLock);
3154         adapter->AllRcvBlockCount++;
3155         InsertTailList(&adapter->AllRcvBlocks, &RcvBlockHdr->AllList);
3156         spin_unlock(&adapter->RcvQLock);
3157
3158         // Now free the contained receive data buffers that we initialized above
3159         RcvDataBuffer = RcvBlock;
3160         for (i = 0, Paddr = PhysicalAddress;
3161              i < SXG_RCV_DESCRIPTORS_PER_BLOCK;
3162              i++, Paddr += BufferSize, RcvDataBuffer += BufferSize) {
3163                 RcvDataBufferHdr = (PSXG_RCV_DATA_BUFFER_HDR) (RcvDataBuffer +
3164                                                                SXG_RCV_DATA_BUFFER_HDR_OFFSET
3165                                                                (BufferSize));
3166                 spin_lock(&adapter->RcvQLock);
3167                 SXG_FREE_RCV_DATA_BUFFER(adapter, RcvDataBufferHdr);
3168                 spin_unlock(&adapter->RcvQLock);
3169         }
3170
3171         // Locate the descriptor block and put it on a separate free queue
3172         RcvDescriptorBlock =
3173             (PSXG_RCV_DESCRIPTOR_BLOCK) ((unsigned char *)RcvBlock +
3174                                          SXG_RCV_DESCRIPTOR_BLOCK_OFFSET
3175                                          (BufferSize));
3176         RcvDescriptorBlockHdr =
3177             (PSXG_RCV_DESCRIPTOR_BLOCK_HDR) ((unsigned char *)RcvBlock +
3178                                              SXG_RCV_DESCRIPTOR_BLOCK_HDR_OFFSET
3179                                              (BufferSize));
3180         RcvDescriptorBlockHdr->VirtualAddress = RcvDescriptorBlock;
3181         RcvDescriptorBlockHdr->PhysicalAddress = Paddr;
3182         spin_lock(&adapter->RcvQLock);
3183         SXG_FREE_RCV_DESCRIPTOR_BLOCK(adapter, RcvDescriptorBlockHdr);
3184         spin_unlock(&adapter->RcvQLock);
3185         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAlRBlk",
3186                   adapter, RcvBlock, Length, 0);
3187         return;
3188       fail:
3189         // Free any allocated resources
3190         if (RcvBlock) {
3191                 RcvDataBuffer = RcvBlock;
3192                 for (i = 0; i < SXG_RCV_DESCRIPTORS_PER_BLOCK;
3193                      i++, RcvDataBuffer += BufferSize) {
3194                         RcvDataBufferHdr =
3195                             (PSXG_RCV_DATA_BUFFER_HDR) (RcvDataBuffer +
3196                                                         SXG_RCV_DATA_BUFFER_HDR_OFFSET
3197                                                         (BufferSize));
3198                         SXG_FREE_RCV_PACKET(RcvDataBufferHdr);
3199                 }
3200                 pci_free_consistent(adapter->pcidev,
3201                                     Length, RcvBlock, PhysicalAddress);
3202         }
3203         DBG_ERROR("%s: OUT OF RESOURCES\n", __FUNCTION__);
3204         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_IMPORTANT, "RcvAFail",
3205                   adapter, adapter->FreeRcvBufferCount,
3206                   adapter->FreeRcvBlockCount, adapter->AllRcvBlockCount);
3207         adapter->Stats.NoMem++;
3208 }
3209
3210 /*
3211  * sxg_allocate_sgl_buffer_complete - Complete a SGL buffer allocation
3212  *
3213  * Arguments -
3214  *      adapter                         - A pointer to our adapter structure
3215  *      SxgSgl                          - SXG_SCATTER_GATHER buffer
3216  *      PhysicalAddress         - Physical address
3217  *      Length                          - Memory length
3218  *
3219  * Return
3220  *
3221  */
3222 static void sxg_allocate_sgl_buffer_complete(p_adapter_t adapter,
3223                                              PSXG_SCATTER_GATHER SxgSgl,
3224                                              dma_addr_t PhysicalAddress,
3225                                              u32 Length)
3226 {
3227         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "AlSglCmp",
3228                   adapter, SxgSgl, Length, 0);
3229         spin_lock(&adapter->SglQLock);
3230         adapter->AllSglBufferCount++;
3231         memset(SxgSgl, 0, sizeof(SXG_SCATTER_GATHER));
3232         SxgSgl->PhysicalAddress = PhysicalAddress;      /* *PhysicalAddress; */
3233         SxgSgl->adapter = adapter;      // Initialize backpointer once
3234         InsertTailList(&adapter->AllSglBuffers, &SxgSgl->AllList);
3235         spin_unlock(&adapter->SglQLock);
3236         SxgSgl->State = SXG_BUFFER_BUSY;
3237         SXG_FREE_SGL_BUFFER(adapter, SxgSgl, NULL);
3238         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAlSgl",
3239                   adapter, SxgSgl, Length, 0);
3240 }
3241
3242 static unsigned char temp_mac_address[6] =
3243     { 0x00, 0xab, 0xcd, 0xef, 0x12, 0x69 };
3244
3245 static void sxg_adapter_set_hwaddr(p_adapter_t adapter)
3246 {
3247 //  DBG_ERROR ("%s ENTER card->config_set[%x] port[%d] physport[%d] funct#[%d]\n", __FUNCTION__,
3248 //             card->config_set, adapter->port, adapter->physport, adapter->functionnumber);
3249 //
3250 //  sxg_dbg_macaddrs(adapter);
3251
3252         memcpy(adapter->macaddr, temp_mac_address, sizeof(SXG_CONFIG_MAC));
3253 //      DBG_ERROR ("%s AFTER copying from config.macinfo into currmacaddr\n", __FUNCTION__);
3254 //      sxg_dbg_macaddrs(adapter);
3255         if (!(adapter->currmacaddr[0] ||
3256               adapter->currmacaddr[1] ||
3257               adapter->currmacaddr[2] ||
3258               adapter->currmacaddr[3] ||
3259               adapter->currmacaddr[4] || adapter->currmacaddr[5])) {
3260                 memcpy(adapter->currmacaddr, adapter->macaddr, 6);
3261         }
3262         if (adapter->netdev) {
3263                 memcpy(adapter->netdev->dev_addr, adapter->currmacaddr, 6);
3264         }
3265 //  DBG_ERROR ("%s EXIT port %d\n", __FUNCTION__, adapter->port);
3266         sxg_dbg_macaddrs(adapter);
3267
3268 }
3269
3270 static int sxg_mac_set_address(p_net_device dev, void *ptr)
3271 {
3272 #if XXXTODO
3273         p_adapter_t adapter = (p_adapter_t) netdev_priv(dev);
3274         struct sockaddr *addr = ptr;
3275
3276         DBG_ERROR("%s ENTER (%s)\n", __FUNCTION__, adapter->netdev->name);
3277
3278         if (netif_running(dev)) {
3279                 return -EBUSY;
3280         }
3281         if (!adapter) {
3282                 return -EBUSY;
3283         }
3284         DBG_ERROR("sxg: %s (%s) curr %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
3285                   __FUNCTION__, adapter->netdev->name, adapter->currmacaddr[0],
3286                   adapter->currmacaddr[1], adapter->currmacaddr[2],
3287                   adapter->currmacaddr[3], adapter->currmacaddr[4],
3288                   adapter->currmacaddr[5]);
3289         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
3290         memcpy(adapter->currmacaddr, addr->sa_data, dev->addr_len);
3291         DBG_ERROR("sxg: %s (%s) new %2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X\n",
3292                   __FUNCTION__, adapter->netdev->name, adapter->currmacaddr[0],
3293                   adapter->currmacaddr[1], adapter->currmacaddr[2],
3294                   adapter->currmacaddr[3], adapter->currmacaddr[4],
3295                   adapter->currmacaddr[5]);
3296
3297         sxg_config_set(adapter, TRUE);
3298 #endif
3299         return 0;
3300 }
3301
3302 /*****************************************************************************/
3303 /*************  SXG DRIVER FUNCTIONS  (below) ********************************/
3304 /*****************************************************************************/
3305
3306 /*
3307  * sxg_initialize_adapter - Initialize adapter
3308  *
3309  * Arguments -
3310  *      adapter         - A pointer to our adapter structure
3311  *
3312  * Return
3313  *      int
3314  */
3315 static int sxg_initialize_adapter(p_adapter_t adapter)
3316 {
3317         u32 RssIds, IsrCount;
3318         u32 i;
3319         int status;
3320
3321         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "InitAdpt",
3322                   adapter, 0, 0, 0);
3323
3324         RssIds = 1;             //  XXXTODO  SXG_RSS_CPU_COUNT(adapter);
3325         IsrCount = adapter->MsiEnabled ? RssIds : 1;
3326
3327         // Sanity check SXG_UCODE_REGS structure definition to
3328         // make sure the length is correct
3329         ASSERT(sizeof(SXG_UCODE_REGS) == SXG_REGISTER_SIZE_PER_CPU);
3330
3331         // Disable interrupts
3332         SXG_DISABLE_ALL_INTERRUPTS(adapter);
3333
3334         // Set MTU
3335         ASSERT((adapter->FrameSize == ETHERMAXFRAME) ||
3336                (adapter->FrameSize == JUMBOMAXFRAME));
3337         WRITE_REG(adapter->UcodeRegs[0].LinkMtu, adapter->FrameSize, TRUE);
3338
3339         // Set event ring base address and size
3340         WRITE_REG64(adapter,
3341                     adapter->UcodeRegs[0].EventBase, adapter->PEventRings, 0);
3342         WRITE_REG(adapter->UcodeRegs[0].EventSize, EVENT_RING_SIZE, TRUE);
3343
3344         // Per-ISR initialization
3345         for (i = 0; i < IsrCount; i++) {
3346                 u64 Addr;
3347                 // Set interrupt status pointer
3348                 Addr = adapter->PIsr + (i * sizeof(u32));
3349                 WRITE_REG64(adapter, adapter->UcodeRegs[i].Isp, Addr, i);
3350         }
3351
3352         // XMT ring zero index
3353         WRITE_REG64(adapter,
3354                     adapter->UcodeRegs[0].SPSendIndex,
3355                     adapter->PXmtRingZeroIndex, 0);
3356
3357         // Per-RSS initialization
3358         for (i = 0; i < RssIds; i++) {
3359                 // Release all event ring entries to the Microcode
3360                 WRITE_REG(adapter->UcodeRegs[i].EventRelease, EVENT_RING_SIZE,
3361                           TRUE);
3362         }
3363
3364         // Transmit ring base and size
3365         WRITE_REG64(adapter,
3366                     adapter->UcodeRegs[0].XmtBase, adapter->PXmtRings, 0);
3367         WRITE_REG(adapter->UcodeRegs[0].XmtSize, SXG_XMT_RING_SIZE, TRUE);
3368
3369         // Receive ring base and size
3370         WRITE_REG64(adapter,
3371                     adapter->UcodeRegs[0].RcvBase, adapter->PRcvRings, 0);
3372         WRITE_REG(adapter->UcodeRegs[0].RcvSize, SXG_RCV_RING_SIZE, TRUE);
3373
3374         // Populate the card with receive buffers
3375         sxg_stock_rcv_buffers(adapter);
3376
3377         // Initialize checksum offload capabilities.  At the moment
3378         // we always enable IP and TCP receive checksums on the card.
3379         // Depending on the checksum configuration specified by the
3380         // user, we can choose to report or ignore the checksum
3381         // information provided by the card.
3382         WRITE_REG(adapter->UcodeRegs[0].ReceiveChecksum,
3383                   SXG_RCV_TCP_CSUM_ENABLED | SXG_RCV_IP_CSUM_ENABLED, TRUE);
3384
3385         // Initialize the MAC, XAUI
3386         DBG_ERROR("sxg: %s ENTER sxg_initialize_link\n", __FUNCTION__);
3387         status = sxg_initialize_link(adapter);
3388         DBG_ERROR("sxg: %s EXIT sxg_initialize_link status[%x]\n", __FUNCTION__,
3389                   status);
3390         if (status != STATUS_SUCCESS) {
3391                 return (status);
3392         }
3393         // Initialize Dead to FALSE.
3394         // SlicCheckForHang or SlicDumpThread will take it from here.
3395         adapter->Dead = FALSE;
3396         adapter->PingOutstanding = FALSE;
3397
3398         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XInit",
3399                   adapter, 0, 0, 0);
3400         return (STATUS_SUCCESS);
3401 }
3402
3403 /*
3404  * sxg_fill_descriptor_block - Populate a descriptor block and give it to
3405  * the card.  The caller should hold the RcvQLock
3406  *
3407  * Arguments -
3408  *      adapter         - A pointer to our adapter structure
3409  *  RcvDescriptorBlockHdr       - Descriptor block to fill
3410  *
3411  * Return
3412  *      status
3413  */
3414 static int sxg_fill_descriptor_block(p_adapter_t adapter,
3415                                      PSXG_RCV_DESCRIPTOR_BLOCK_HDR
3416                                      RcvDescriptorBlockHdr)
3417 {
3418         u32 i;
3419         PSXG_RING_INFO RcvRingInfo = &adapter->RcvRingZeroInfo;
3420         PSXG_RCV_DATA_BUFFER_HDR RcvDataBufferHdr;
3421         PSXG_RCV_DESCRIPTOR_BLOCK RcvDescriptorBlock;
3422         PSXG_CMD RingDescriptorCmd;
3423         PSXG_RCV_RING RingZero = &adapter->RcvRings[0];
3424
3425         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "FilBlk",
3426                   adapter, adapter->RcvBuffersOnCard,
3427                   adapter->FreeRcvBufferCount, adapter->AllRcvBlockCount);
3428
3429         ASSERT(RcvDescriptorBlockHdr);
3430
3431         // If we don't have the resources to fill the descriptor block,
3432         // return failure
3433         if ((adapter->FreeRcvBufferCount < SXG_RCV_DESCRIPTORS_PER_BLOCK) ||
3434             SXG_RING_FULL(RcvRingInfo)) {
3435                 adapter->Stats.NoMem++;
3436                 return (STATUS_FAILURE);
3437         }
3438         // Get a ring descriptor command
3439         SXG_GET_CMD(RingZero,
3440                     RcvRingInfo, RingDescriptorCmd, RcvDescriptorBlockHdr);
3441         ASSERT(RingDescriptorCmd);
3442         RcvDescriptorBlockHdr->State = SXG_BUFFER_ONCARD;
3443         RcvDescriptorBlock =
3444             (PSXG_RCV_DESCRIPTOR_BLOCK) RcvDescriptorBlockHdr->VirtualAddress;
3445
3446         // Fill in the descriptor block
3447         for (i = 0; i < SXG_RCV_DESCRIPTORS_PER_BLOCK; i++) {
3448                 SXG_GET_RCV_DATA_BUFFER(adapter, RcvDataBufferHdr);
3449                 ASSERT(RcvDataBufferHdr);
3450                 SXG_REINIATIALIZE_PACKET(RcvDataBufferHdr->SxgDumbRcvPacket);
3451                 RcvDataBufferHdr->State = SXG_BUFFER_ONCARD;
3452                 RcvDescriptorBlock->Descriptors[i].VirtualAddress =
3453                     (void *)RcvDataBufferHdr;
3454                 RcvDescriptorBlock->Descriptors[i].PhysicalAddress =
3455                     RcvDataBufferHdr->PhysicalAddress;
3456         }
3457         // Add the descriptor block to receive descriptor ring 0
3458         RingDescriptorCmd->Sgl = RcvDescriptorBlockHdr->PhysicalAddress;
3459
3460         // RcvBuffersOnCard is not protected via the receive lock (see
3461         // sxg_process_event_queue) We don't want to grap a lock every time a
3462         // buffer is returned to us, so we use atomic interlocked functions
3463         // instead.
3464         adapter->RcvBuffersOnCard += SXG_RCV_DESCRIPTORS_PER_BLOCK;
3465
3466         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "DscBlk",
3467                   RcvDescriptorBlockHdr,
3468                   RingDescriptorCmd, RcvRingInfo->Head, RcvRingInfo->Tail);
3469
3470         WRITE_REG(adapter->UcodeRegs[0].RcvCmd, 1, true);
3471         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XFilBlk",
3472                   adapter, adapter->RcvBuffersOnCard,
3473                   adapter->FreeRcvBufferCount, adapter->AllRcvBlockCount);
3474         return (STATUS_SUCCESS);
3475 }
3476
3477 /*
3478  * sxg_stock_rcv_buffers - Stock the card with receive buffers
3479  *
3480  * Arguments -
3481  *      adapter         - A pointer to our adapter structure
3482  *
3483  * Return
3484  *      None
3485  */
3486 static void sxg_stock_rcv_buffers(p_adapter_t adapter)
3487 {
3488         PSXG_RCV_DESCRIPTOR_BLOCK_HDR RcvDescriptorBlockHdr;
3489
3490         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "StockBuf",
3491                   adapter, adapter->RcvBuffersOnCard,
3492                   adapter->FreeRcvBufferCount, adapter->AllRcvBlockCount);
3493         // First, see if we've got less than our minimum threshold of
3494         // receive buffers, there isn't an allocation in progress, and
3495         // we haven't exceeded our maximum.. get another block of buffers
3496         // None of this needs to be SMP safe.  It's round numbers.
3497         if ((adapter->FreeRcvBufferCount < SXG_MIN_RCV_DATA_BUFFERS) &&
3498             (adapter->AllRcvBlockCount < SXG_MAX_RCV_BLOCKS) &&
3499             (adapter->AllocationsPending == 0)) {
3500                 sxg_allocate_buffer_memory(adapter,
3501                                            SXG_RCV_BLOCK_SIZE(adapter->
3502                                                               ReceiveBufferSize),
3503                                            SXG_BUFFER_TYPE_RCV);
3504         }
3505         // Now grab the RcvQLock lock and proceed
3506         spin_lock(&adapter->RcvQLock);
3507         while (adapter->RcvBuffersOnCard < SXG_RCV_DATA_BUFFERS) {
3508                 PLIST_ENTRY _ple;
3509
3510                 // Get a descriptor block
3511                 RcvDescriptorBlockHdr = NULL;
3512                 if (adapter->FreeRcvBlockCount) {
3513                         _ple = RemoveHeadList(&adapter->FreeRcvBlocks);
3514                         RcvDescriptorBlockHdr =
3515                             container_of(_ple, SXG_RCV_DESCRIPTOR_BLOCK_HDR,
3516                                          FreeList);
3517                         adapter->FreeRcvBlockCount--;
3518                         RcvDescriptorBlockHdr->State = SXG_BUFFER_BUSY;
3519                 }
3520
3521                 if (RcvDescriptorBlockHdr == NULL) {
3522                         // Bail out..
3523                         adapter->Stats.NoMem++;
3524                         break;
3525                 }
3526                 // Fill in the descriptor block and give it to the card
3527                 if (sxg_fill_descriptor_block(adapter, RcvDescriptorBlockHdr) ==
3528                     STATUS_FAILURE) {
3529                         // Free the descriptor block
3530                         SXG_FREE_RCV_DESCRIPTOR_BLOCK(adapter,
3531                                                       RcvDescriptorBlockHdr);
3532                         break;
3533                 }
3534         }
3535         spin_unlock(&adapter->RcvQLock);
3536         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XFilBlks",
3537                   adapter, adapter->RcvBuffersOnCard,
3538                   adapter->FreeRcvBufferCount, adapter->AllRcvBlockCount);
3539 }
3540
3541 /*
3542  * sxg_complete_descriptor_blocks - Return descriptor blocks that have been
3543  * completed by the microcode
3544  *
3545  * Arguments -
3546  *      adapter         - A pointer to our adapter structure
3547  *      Index           - Where the microcode is up to
3548  *
3549  * Return
3550  *      None
3551  */
3552 static void sxg_complete_descriptor_blocks(p_adapter_t adapter,
3553                                            unsigned char Index)
3554 {
3555         PSXG_RCV_RING RingZero = &adapter->RcvRings[0];
3556         PSXG_RING_INFO RcvRingInfo = &adapter->RcvRingZeroInfo;
3557         PSXG_RCV_DESCRIPTOR_BLOCK_HDR RcvDescriptorBlockHdr;
3558         PSXG_CMD RingDescriptorCmd;
3559
3560         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "CmpRBlks",
3561                   adapter, Index, RcvRingInfo->Head, RcvRingInfo->Tail);
3562
3563         // Now grab the RcvQLock lock and proceed
3564         spin_lock(&adapter->RcvQLock);
3565         ASSERT(Index != RcvRingInfo->Tail);
3566         while (RcvRingInfo->Tail != Index) {
3567                 //
3568                 // Locate the current Cmd (ring descriptor entry), and
3569                 // associated receive descriptor block, and advance
3570                 // the tail
3571                 //
3572                 SXG_RETURN_CMD(RingZero,
3573                                RcvRingInfo,
3574                                RingDescriptorCmd, RcvDescriptorBlockHdr);
3575                 SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "CmpRBlk",
3576                           RcvRingInfo->Head, RcvRingInfo->Tail,
3577                           RingDescriptorCmd, RcvDescriptorBlockHdr);
3578
3579                 // Clear the SGL field
3580                 RingDescriptorCmd->Sgl = 0;
3581                 // Attempt to refill it and hand it right back to the
3582                 // card.  If we fail to refill it, free the descriptor block
3583                 // header.  The card will be restocked later via the
3584                 // RcvBuffersOnCard test
3585                 if (sxg_fill_descriptor_block(adapter, RcvDescriptorBlockHdr) ==
3586                     STATUS_FAILURE) {
3587                         SXG_FREE_RCV_DESCRIPTOR_BLOCK(adapter,
3588                                                       RcvDescriptorBlockHdr);
3589                 }
3590         }
3591         spin_unlock(&adapter->RcvQLock);
3592         SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XCRBlks",
3593                   adapter, Index, RcvRingInfo->Head, RcvRingInfo->Tail);
3594 }
3595
3596 static struct pci_driver sxg_driver = {
3597         .name = DRV_NAME,
3598         .id_table = sxg_pci_tbl,
3599         .probe = sxg_entry_probe,
3600         .remove = sxg_entry_remove,
3601 #if SXG_POWER_MANAGEMENT_ENABLED
3602         .suspend = sxgpm_suspend,
3603         .resume = sxgpm_resume,
3604 #endif
3605 /*    .shutdown   =     slic_shutdown,  MOOK_INVESTIGATE */
3606 };
3607
3608 static int __init sxg_module_init(void)
3609 {
3610         sxg_init_driver();
3611
3612         if (debug >= 0)
3613                 sxg_debug = debug;
3614
3615         return pci_register_driver(&sxg_driver);
3616 }
3617
3618 static void __exit sxg_module_cleanup(void)
3619 {
3620         pci_unregister_driver(&sxg_driver);
3621 }
3622
3623 module_init(sxg_module_init);
3624 module_exit(sxg_module_cleanup);