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Annotation of Gnu-Mach/linux/src/drivers/net/intel-gige.c, revision 1.1

1.1     ! root        1: /* intel-gige.c: A Linux device driver for Intel Gigabit Ethernet adapters. */
        !             2: /*
        !             3:        Written 2000-2002 by Donald Becker.
        !             4:        Copyright Scyld Computing Corporation.
        !             5: 
        !             6:        This software may be used and distributed according to the terms of
        !             7:        the GNU General Public License (GPL), incorporated herein by reference.
        !             8:        You should have received a copy of the GPL with this file.
        !             9:        Drivers based on or derived from this code fall under the GPL and must
        !            10:        retain the authorship, copyright and license notice.  This file is not
        !            11:        a complete program and may only be used when the entire operating
        !            12:        system is licensed under the GPL.
        !            13: 
        !            14:        The author may be reached as [email protected], or C/O
        !            15:        Scyld Computing Corporation
        !            16:        410 Severn Ave., Suite 210
        !            17:        Annapolis MD 21403
        !            18: 
        !            19:        Support information and updates available at
        !            20:        http://www.scyld.com/network/ethernet.html
        !            21: */
        !            22: 
        !            23: /* These identify the driver base version and may not be removed. */
        !            24: static const char version1[] =
        !            25: "intel-gige.c:v0.14 11/17/2002 Written by Donald Becker <[email protected]>\n";
        !            26: static const char version2[] =
        !            27: "  http://www.scyld.com/network/ethernet.html\n";
        !            28: 
        !            29: /* Automatically extracted configuration info:
        !            30: probe-func: igige_probe
        !            31: config-in: tristate 'Intel PCI Gigabit Ethernet support' CONFIG_IGIGE
        !            32: 
        !            33: c-help-name: Intel PCI Gigabit Ethernet support
        !            34: c-help-symbol: CONFIG_IGIGE
        !            35: c-help: This driver is for the Intel PCI Gigabit Ethernet
        !            36: c-help: adapter series.
        !            37: c-help: More specific information and updates are available from 
        !            38: c-help: http://www.scyld.com/network/drivers.html
        !            39: */
        !            40: 
        !            41: /* The user-configurable values.
        !            42:    These may be modified when a driver module is loaded.*/
        !            43: 
        !            44: /* Message enable level: 0..31 = no..all messages.  See NETIF_MSG docs. */
        !            45: static int debug = 2;
        !            46: 
        !            47: /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
        !            48: static int max_interrupt_work = 20;
        !            49: 
        !            50: /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
        !            51:    This chip has a 16 element perfect filter, and an unusual 4096 bit
        !            52:    hash filter based directly on address bits, not the Ethernet CRC.
        !            53:    It is costly to recalculate a large, frequently changing table.
        !            54:    However even a large table may useful in some nearly-static environments.
        !            55: */
        !            56: static int multicast_filter_limit = 15;
        !            57: 
        !            58: /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
        !            59:    Setting to > 1518 effectively disables this feature. */
        !            60: static int rx_copybreak = 0;
        !            61: 
        !            62: /* Used to pass the media type, etc.
        !            63:    The media type is passed in 'options[]'.  The full_duplex[] table only
        !            64:    allows the duplex to be forced on, implicitly disabling autonegotiation.
        !            65:    Setting the entry to zero still allows a link to autonegotiate to full
        !            66:    duplex.
        !            67: */
        !            68: #define MAX_UNITS 8            /* More are supported, limit only on options */
        !            69: static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
        !            70: static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
        !            71: 
        !            72: /* The delay before announcing a Rx or Tx has completed. */
        !            73: static int rx_intr_holdoff = 0;
        !            74: static int tx_intr_holdoff = 128;
        !            75: 
        !            76: /* Operational parameters that are set at compile time. */
        !            77: 
        !            78: /* Keep the ring sizes a power of two to avoid divides.
        !            79:    The compiler will convert <unsigned>'%'<2^N> into a bit mask.
        !            80:    Making the Tx ring too large decreases the effectiveness of channel
        !            81:    bonding and packet priority.
        !            82:    There are no ill effects from too-large receive rings. */
        !            83: #if ! defined(final_version)           /* Stress the driver. */
        !            84: #define TX_RING_SIZE   8
        !            85: #define TX_QUEUE_LEN   5
        !            86: #define RX_RING_SIZE   4
        !            87: #else
        !            88: #define TX_RING_SIZE   16
        !            89: #define TX_QUEUE_LEN   10              /* Limit ring entries actually used.  */
        !            90: #define RX_RING_SIZE   32
        !            91: #endif
        !            92: 
        !            93: /* Operational parameters that usually are not changed. */
        !            94: /* Time in jiffies before concluding the transmitter is hung. */
        !            95: #define TX_TIMEOUT  (6*HZ)
        !            96: 
        !            97: /* Allocation size of Rx buffers with normal sized Ethernet frames.
        !            98:    Do not change this value without good reason.  This is not a limit,
        !            99:    but a way to keep a consistent allocation size among drivers.
        !           100:  */
        !           101: #define PKT_BUF_SZ             1536
        !           102: 
        !           103: #ifndef __KERNEL__
        !           104: #define __KERNEL__
        !           105: #endif
        !           106: #if !defined(__OPTIMIZE__)
        !           107: #warning  You must compile this file with the correct options!
        !           108: #warning  See the last lines of the source file.
        !           109: #error You must compile this driver with "-O".
        !           110: #endif
        !           111: 
        !           112: /* Include files, designed to support most kernel versions 2.0.0 and later. */
        !           113: #include <linux/config.h>
        !           114: #if defined(CONFIG_SMP) && ! defined(__SMP__)
        !           115: #define __SMP__
        !           116: #endif
        !           117: #if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
        !           118: #define MODVERSIONS
        !           119: #endif
        !           120: 
        !           121: #include <linux/version.h>
        !           122: #if defined(MODVERSIONS)
        !           123: #include <linux/modversions.h>
        !           124: #endif
        !           125: #include <linux/module.h>
        !           126: 
        !           127: #include <linux/kernel.h>
        !           128: #include <linux/string.h>
        !           129: #include <linux/timer.h>
        !           130: #include <linux/errno.h>
        !           131: #include <linux/ioport.h>
        !           132: #if LINUX_VERSION_CODE >= 0x20400
        !           133: #include <linux/slab.h>
        !           134: #else
        !           135: #include <linux/malloc.h>
        !           136: #endif
        !           137: #include <linux/interrupt.h>
        !           138: #include <linux/pci.h>
        !           139: #include <linux/netdevice.h>
        !           140: #include <linux/etherdevice.h>
        !           141: #include <linux/skbuff.h>
        !           142: #include <asm/processor.h>             /* Processor type for cache alignment. */
        !           143: #include <asm/bitops.h>
        !           144: #include <asm/io.h>
        !           145: 
        !           146: #ifdef INLINE_PCISCAN
        !           147: #include "k_compat.h"
        !           148: #else
        !           149: #include "pci-scan.h"
        !           150: #include "kern_compat.h"
        !           151: #endif
        !           152: 
        !           153: /* Condensed operations for readability. */
        !           154: #define virt_to_le32desc(addr)  cpu_to_le32(virt_to_bus(addr))
        !           155: #define le32desc_to_virt(addr)  bus_to_virt(le32_to_cpu(addr))
        !           156: 
        !           157: #if (LINUX_VERSION_CODE >= 0x20100)  &&  defined(MODULE)
        !           158: char kernel_version[] = UTS_RELEASE;
        !           159: #endif
        !           160: 
        !           161: MODULE_AUTHOR("Donald Becker <[email protected]>");
        !           162: MODULE_DESCRIPTION("Intel Gigabit Ethernet driver");
        !           163: MODULE_LICENSE("GPL");
        !           164: MODULE_PARM(debug, "i");
        !           165: MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
        !           166: MODULE_PARM(rx_copybreak, "i");
        !           167: MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
        !           168: MODULE_PARM(multicast_filter_limit, "i");
        !           169: MODULE_PARM(max_interrupt_work, "i");
        !           170: MODULE_PARM_DESC(debug, "Driver message level (0-31)");
        !           171: MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex");
        !           172: MODULE_PARM_DESC(max_interrupt_work,
        !           173:                                 "Driver maximum events handled per interrupt");
        !           174: MODULE_PARM_DESC(full_duplex,
        !           175:                                 "Non-zero to set forced full duplex (deprecated).");
        !           176: MODULE_PARM_DESC(rx_copybreak,
        !           177:                                 "Breakpoint in bytes for copy-only-tiny-frames");
        !           178: MODULE_PARM_DESC(multicast_filter_limit,
        !           179:                                 "Multicast addresses before switching to Rx-all-multicast");
        !           180: 
        !           181: /*
        !           182:                                Theory of Operation
        !           183: 
        !           184: I. Board Compatibility
        !           185: 
        !           186: This driver is for the Intel Gigabit Ethernet adapter.
        !           187: 
        !           188: II. Board-specific settings
        !           189: 
        !           190: III. Driver operation
        !           191: 
        !           192: IIIa. Descriptor Rings
        !           193: 
        !           194: This driver uses two statically allocated fixed-size descriptor arrays
        !           195: treated as rings by the hardware. The ring sizes are set at compile time
        !           196: by RX/TX_RING_SIZE.
        !           197: 
        !           198: IIIb/c. Transmit/Receive Structure
        !           199: 
        !           200: This driver uses a zero-copy receive and transmit scheme.
        !           201: The driver allocates full frame size skbuffs for the Rx ring buffers at
        !           202: open() time and passes the skb->data field to the chip as receive data
        !           203: buffers.  When an incoming frame is less than RX_COPYBREAK bytes long,
        !           204: a fresh skbuff is allocated and the frame is copied to the new skbuff.
        !           205: When the incoming frame is larger, the skbuff is passed directly up the
        !           206: protocol stack.  Buffers consumed this way are replaced by newly allocated
        !           207: skbuffs in a later phase of receives.
        !           208: 
        !           209: The RX_COPYBREAK value is chosen to trade-off the memory wasted by
        !           210: using a full-sized skbuff for small frames vs. the copying costs of larger
        !           211: frames.  New boards are typically used in generously configured machines
        !           212: and the underfilled buffers have negligible impact compared to the benefit of
        !           213: a single allocation size, so the default value of zero results in never
        !           214: copying packets.  When copying is done, the cost is usually mitigated by using
        !           215: a combined copy/checksum routine.  Copying also preloads the cache, which is
        !           216: most useful with small frames.
        !           217: 
        !           218: A subtle aspect of the operation is that the IP header at offset 14 in an
        !           219: ethernet frame isn't longword aligned for further processing.
        !           220: When unaligned buffers are permitted by the hardware (and always on copies)
        !           221: frames are put into the skbuff at an offset of "+2", 16-byte aligning
        !           222: the IP header.
        !           223: 
        !           224: IIId. Synchronization
        !           225: 
        !           226: The driver runs as two independent, single-threaded flows of control.
        !           227: One is the send-packet routine which is single-threaded by the queue
        !           228: layer.  The other thread is the interrupt handler, which is single
        !           229: threaded by the hardware and interrupt handling software.
        !           230: 
        !           231: The send packet thread has partial control over the Tx ring.  At the
        !           232: start of a transmit attempt netif_pause_tx_queue(dev) is called.  If the
        !           233: transmit attempt fills the Tx queue controlled by the chip, the driver
        !           234: informs the software queue layer by not calling
        !           235: netif_unpause_tx_queue(dev) on exit.
        !           236: 
        !           237: The interrupt handler has exclusive control over the Rx ring and records stats
        !           238: from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
        !           239: empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
        !           240: clears both the tx_full and tbusy flags.
        !           241: 
        !           242: IIId. SMP semantics
        !           243: 
        !           244: The following are serialized with respect to each other via the "xmit_lock".
        !           245:   dev->hard_start_xmit()       Transmit a packet
        !           246:   dev->tx_timeout()                    Transmit watchdog for stuck Tx
        !           247:   dev->set_multicast_list()    Set the recieve filter.
        !           248: Note: The Tx timeout watchdog code is implemented by the timer routine in
        !           249: kernels up to 2.2.*.  In 2.4.* and later the timeout code is part of the
        !           250: driver interface.
        !           251: 
        !           252: The following fall under the global kernel lock.  The module will not be
        !           253: unloaded during the call, unless a call with a potential reschedule e.g.
        !           254: kmalloc() is called.  No other synchronization assertion is made.
        !           255:   dev->open()
        !           256:   dev->do_ioctl()
        !           257:   dev->get_stats()
        !           258: Caution: The lock for dev->open() is commonly broken with request_irq() or
        !           259: kmalloc().  It is best to avoid any lock-breaking call in do_ioctl() and
        !           260: get_stats(), or additional module locking code must be implemented.
        !           261: 
        !           262: The following is self-serialized (no simultaneous entry)
        !           263:   An handler registered with request_irq().
        !           264: 
        !           265: IV. Notes
        !           266: 
        !           267: IVb. References
        !           268: 
        !           269: Intel has also released a Linux driver for this product, "e1000".
        !           270: 
        !           271: IVc. Errata
        !           272: 
        !           273: */
        !           274: 
        !           275: 
        !           276: 
        !           277: static void *igige_probe1(struct pci_dev *pdev, void *init_dev,
        !           278:                                                   long ioaddr, int irq, int chip_idx, int find_cnt);
        !           279: static int netdev_pwr_event(void *dev_instance, int event);
        !           280: enum chip_capability_flags { CanHaveMII=1, };
        !           281: #define PCI_IOTYPE ()
        !           282: 
        !           283: static struct pci_id_info pci_id_tbl[] = {
        !           284:        {"Intel Gigabit Ethernet adapter", {0x10008086, 0xffffffff, },
        !           285:         PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR0, 0x1ffff, 0},
        !           286:        {0,},                                           /* 0 terminated list. */
        !           287: };
        !           288: 
        !           289: struct drv_id_info igige_drv_id = {
        !           290:        "intel-gige", PCI_HOTSWAP, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl,
        !           291:        igige_probe1, netdev_pwr_event };
        !           292: 
        !           293: /* This hardware only has a PCI memory space BAR, not I/O space. */
        !           294: #ifdef USE_IO_OPS
        !           295: #error This driver only works with PCI memory space access.
        !           296: #endif
        !           297: 
        !           298: /* Offsets to the device registers.
        !           299: */
        !           300: enum register_offsets {
        !           301:        ChipCtrl=0x00, ChipStatus=0x08, EECtrl=0x10,
        !           302:        FlowCtrlAddrLo=0x028, FlowCtrlAddrHi=0x02c, FlowCtrlType=0x030,
        !           303:        VLANetherType=0x38,
        !           304: 
        !           305:        RxAddrCAM=0x040,
        !           306:        IntrStatus=0x0C0,                       /* Interrupt, Clear on Read, AKA ICR */
        !           307:        IntrEnable=0x0D0,                       /* Set enable mask when '1' AKA IMS */
        !           308:        IntrDisable=0x0D8,                      /* Clear enable mask when '1' */
        !           309: 
        !           310:        RxControl=0x100,
        !           311:        RxQ0IntrDelay=0x108,            /* Rx list #0 interrupt delay timer. */
        !           312:        RxRingPtr=0x110,                        /* Rx Desc. list #0 base address, 64bits */
        !           313:        RxRingLen=0x118,                        /* Num bytes of Rx descriptors in ring.  */
        !           314:        RxDescHead=0x120,
        !           315:        RxDescTail=0x128,
        !           316: 
        !           317:        RxQ1IntrDelay=0x130,            /* Rx list #1 interrupt delay timer. */
        !           318:        RxRing1Ptr=0x138,                       /* Rx Desc. list #1 base address, 64bits */
        !           319:        RxRing1Len=0x140,                       /* Num bytes of Rx descriptors in ring.  */
        !           320:        RxDesc1Head=0x148,
        !           321:        RxDesc1Tail=0x150,
        !           322: 
        !           323:        FlowCtrlTimer=0x170, FlowCtrlThrshHi=0x160, FlowCtrlThrshLo=0x168, 
        !           324:        TxConfigReg=0x178,
        !           325:        RxConfigReg=0x180,
        !           326:        MulticastArray=0x200,
        !           327: 
        !           328:        TxControl=0x400,
        !           329:        TxQState=0x408,                         /* 64 bit queue state */
        !           330:        TxIPG=0x410,                            /* Inter-Packet Gap */
        !           331:        TxRingPtr=0x420, TxRingLen=0x428,
        !           332:        TxDescHead=0x430, TxDescTail=0x438, TxIntrDelay=0x440,
        !           333: 
        !           334:        RxCRCErrs=0x4000, RxMissed=0x4010,
        !           335: 
        !           336:        TxStatus=0x408,
        !           337:        RxStatus=0x180,
        !           338: };
        !           339: 
        !           340: /* Bits in the interrupt status/mask registers. */
        !           341: enum intr_status_bits {
        !           342:        IntrTxDone=0x0001,                      /* Tx packet queued */
        !           343:        IntrLinkChange=0x0004,          /* Link Status Change */
        !           344:        IntrRxSErr=0x0008,                      /* Rx Symbol/Sequence error */
        !           345:        IntrRxEmpty=0x0010,                     /* Rx queue 0 Empty */
        !           346:        IntrRxQ1Empty=0x0020,           /* Rx queue 1 Empty */
        !           347:        IntrRxDone=0x0080,                      /* Rx Done, Queue 0*/
        !           348:        IntrRxDoneQ1=0x0100,            /* Rx Done, Queue 0*/
        !           349:        IntrPCIErr=0x0200,                      /* PCI Bus Error */
        !           350: 
        !           351:        IntrTxEmpty=0x0002,                     /* Guess */
        !           352:        StatsMax=0x1000,                        /* Unknown */
        !           353: };
        !           354: 
        !           355: /* Bits in the RxFilterMode register. */
        !           356: enum rx_mode_bits {
        !           357:        RxCtrlReset=0x01, RxCtrlEnable=0x02, RxCtrlAllUnicast=0x08,
        !           358:        RxCtrlAllMulticast=0x10,
        !           359:        RxCtrlLoopback=0xC0,            /* We never configure loopback */
        !           360:        RxCtrlAcceptBroadcast=0x8000, 
        !           361:        /* Aliased names.*/
        !           362:        AcceptAllPhys=0x08,     AcceptAllMulticast=0x10, AcceptBroadcast=0x8000,
        !           363:        AcceptMyPhys=0,
        !           364:        AcceptMulticast=0,
        !           365: };
        !           366: 
        !           367: /* The Rx and Tx buffer descriptors. */
        !           368: struct rx_desc {
        !           369:        u32 buf_addr;
        !           370:        u32 buf_addr_hi;
        !           371:        u32 csum_length;                        /* Checksum and length */
        !           372:        u32 status;                                     /* Errors and status. */
        !           373: };
        !           374: 
        !           375: struct tx_desc {
        !           376:        u32 buf_addr;
        !           377:        u32 buf_addr_hi;
        !           378:        u32 cmd_length;
        !           379:        u32 status;                                     /* And errors */
        !           380: };
        !           381: 
        !           382: /* Bits in tx_desc.cmd_length */
        !           383: enum tx_cmd_bits {
        !           384:        TxDescEndPacket=0x02000000, TxCmdIntrDelay=0x80000000,
        !           385:        TxCmdAddCRC=0x02000000, TxCmdDoTx=0x13000000,
        !           386: };
        !           387: enum tx_status_bits {
        !           388:        TxDescDone=0x0001, TxDescEndPkt=0x0002,
        !           389: };
        !           390: 
        !           391: /* Bits in tx_desc.status */
        !           392: enum rx_status_bits {
        !           393:        RxDescDone=0x0001, RxDescEndPkt=0x0002,
        !           394: };
        !           395: 
        !           396: 
        !           397: #define PRIV_ALIGN     15      /* Required alignment mask */
        !           398: /* Use  __attribute__((aligned (L1_CACHE_BYTES)))  to maintain alignment
        !           399:    within the structure. */
        !           400: struct netdev_private {
        !           401:        struct net_device *next_module;         /* Link for devices of this type. */
        !           402:        void *priv_addr;                                        /* Unaligned address for kfree */
        !           403:        const char *product_name;
        !           404:        /* The addresses of receive-in-place skbuffs. */
        !           405:        struct sk_buff* rx_skbuff[RX_RING_SIZE];
        !           406:        /* The saved address of a sent-in-place packet/buffer, for later free(). */
        !           407:        struct sk_buff* tx_skbuff[TX_RING_SIZE];
        !           408:        struct net_device_stats stats;
        !           409:        struct timer_list timer;        /* Media monitoring timer. */
        !           410:        /* Keep frequently used values adjacent for cache effect. */
        !           411:        int msg_level;
        !           412:        int chip_id, drv_flags;
        !           413:        struct pci_dev *pci_dev;
        !           414:        int max_interrupt_work;
        !           415:        int intr_enable;
        !           416:        long in_interrupt;                      /* Word-long for SMP locks. */
        !           417: 
        !           418:        struct rx_desc *rx_ring;
        !           419:        struct rx_desc *rx_head_desc;
        !           420:        unsigned int cur_rx, dirty_rx;          /* Producer/consumer ring indices */
        !           421:        unsigned int rx_buf_sz;                         /* Based on MTU+slack. */
        !           422:        int rx_copybreak;
        !           423: 
        !           424:        struct tx_desc *tx_ring;
        !           425:        unsigned int cur_tx, dirty_tx;
        !           426:        unsigned int tx_full:1;                         /* The Tx queue is full. */
        !           427: 
        !           428:        unsigned int rx_mode;
        !           429:        unsigned int tx_config;
        !           430:        int multicast_filter_limit;
        !           431:        /* These values track the transceiver/media in use. */
        !           432:        unsigned int full_duplex:1;                     /* Full-duplex operation requested. */
        !           433:        unsigned int duplex_lock:1;
        !           434:        unsigned int medialock:1;                       /* Do not sense media. */
        !           435:        unsigned int default_port;                      /* Last dev->if_port value. */
        !           436: };
        !           437: 
        !           438: static int  eeprom_read(long ioaddr, int location);
        !           439: static int  netdev_open(struct net_device *dev);
        !           440: static int  change_mtu(struct net_device *dev, int new_mtu);
        !           441: static void check_duplex(struct net_device *dev);
        !           442: static void netdev_timer(unsigned long data);
        !           443: static void tx_timeout(struct net_device *dev);
        !           444: static void init_ring(struct net_device *dev);
        !           445: static int  start_tx(struct sk_buff *skb, struct net_device *dev);
        !           446: static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
        !           447: static void netdev_error(struct net_device *dev, int intr_status);
        !           448: static int  netdev_rx(struct net_device *dev);
        !           449: static void netdev_error(struct net_device *dev, int intr_status);
        !           450: static void set_rx_mode(struct net_device *dev);
        !           451: static struct net_device_stats *get_stats(struct net_device *dev);
        !           452: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
        !           453: static int  netdev_close(struct net_device *dev);
        !           454: 
        !           455: 
        !           456: 
        !           457: /* A list of our installed devices, for removing the driver module. */
        !           458: static struct net_device *root_net_dev = NULL;
        !           459: 
        !           460: #ifndef MODULE
        !           461: int igige_probe(struct net_device *dev)
        !           462: {
        !           463:        if (pci_drv_register(&igige_drv_id, dev) < 0)
        !           464:                return -ENODEV;
        !           465:        printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
        !           466:        return 0;
        !           467: }
        !           468: #endif
        !           469: 
        !           470: static void *igige_probe1(struct pci_dev *pdev, void *init_dev,
        !           471:                                                   long ioaddr, int irq, int chip_idx, int card_idx)
        !           472: {
        !           473:        struct net_device *dev;
        !           474:        struct netdev_private *np;
        !           475:        void *priv_mem;
        !           476:        int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0;
        !           477: 
        !           478:        dev = init_etherdev(init_dev, 0);
        !           479:        if (!dev)
        !           480:                return NULL;
        !           481: 
        !           482:        printk(KERN_INFO "%s: %s at 0x%lx, ",
        !           483:                   dev->name, pci_id_tbl[chip_idx].name, ioaddr);
        !           484: 
        !           485:        for (i = 0; i < 3; i++)
        !           486:                ((u16*)dev->dev_addr)[i] = le16_to_cpu(eeprom_read(ioaddr, i));
        !           487:        for (i = 0; i < 5; i++)
        !           488:                printk("%2.2x:", dev->dev_addr[i]);
        !           489:        printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
        !           490: 
        !           491:        /* Make certain elements e.g. descriptor lists are aligned. */
        !           492:        priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL);
        !           493:        /* Check for the very unlikely case of no memory. */
        !           494:        if (priv_mem == NULL)
        !           495:                return NULL;
        !           496: 
        !           497:        /* Do bogusness checks before this point.
        !           498:           We do a request_region() only to register /proc/ioports info. */
        !           499:        request_region(ioaddr, pci_id_tbl[chip_idx].io_size, dev->name);
        !           500: 
        !           501:        /* Reset the chip to erase previous misconfiguration. */
        !           502:        writel(0x04000000, ioaddr + ChipCtrl);
        !           503: 
        !           504:        dev->base_addr = ioaddr;
        !           505:        dev->irq = irq;
        !           506: 
        !           507:        dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN);
        !           508:        memset(np, 0, sizeof(*np));
        !           509:        np->priv_addr = priv_mem;
        !           510: 
        !           511:        np->next_module = root_net_dev;
        !           512:        root_net_dev = dev;
        !           513: 
        !           514:        np->pci_dev = pdev;
        !           515:        np->chip_id = chip_idx;
        !           516:        np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
        !           517:        np->msg_level = (1 << debug) - 1;
        !           518:        np->rx_copybreak = rx_copybreak;
        !           519:        np->max_interrupt_work = max_interrupt_work;
        !           520:        np->multicast_filter_limit = multicast_filter_limit;
        !           521: 
        !           522:        if (dev->mem_start)
        !           523:                option = dev->mem_start;
        !           524: 
        !           525:        /* The lower four bits are the media type. */
        !           526:        if (option > 0) {
        !           527:                if (option & 0x2220)
        !           528:                        np->full_duplex = 1;
        !           529:                np->default_port = option & 0x3330;
        !           530:                if (np->default_port)
        !           531:                        np->medialock = 1;
        !           532:        }
        !           533:        if (card_idx < MAX_UNITS  &&  full_duplex[card_idx] > 0)
        !           534:                np->full_duplex = 1;
        !           535: 
        !           536:        if (np->full_duplex)
        !           537:                np->duplex_lock = 1;
        !           538: 
        !           539: #if ! defined(final_version) /* Dump the EEPROM contents during development. */
        !           540:        if (np->msg_level & NETIF_MSG_MISC) {
        !           541:                int sum = 0;
        !           542:                for (i = 0; i < 0x40; i++) {
        !           543:                        int eeval = eeprom_read(ioaddr, i);
        !           544:                        printk("%4.4x%s", eeval, i % 16 != 15 ? " " : "\n");
        !           545:                        sum += eeval;
        !           546:                }
        !           547:                printk(KERN_DEBUG "%s:  EEPROM checksum %4.4X (expected value 0xBABA).\n",
        !           548:                           dev->name, sum & 0xffff);
        !           549:        }
        !           550: #endif
        !           551: 
        !           552:        /* The chip-specific entries in the device structure. */
        !           553:        dev->open = &netdev_open;
        !           554:        dev->hard_start_xmit = &start_tx;
        !           555:        dev->stop = &netdev_close;
        !           556:        dev->get_stats = &get_stats;
        !           557:        dev->set_multicast_list = &set_rx_mode;
        !           558:        dev->do_ioctl = &mii_ioctl;
        !           559:        dev->change_mtu = &change_mtu;
        !           560: 
        !           561:        /* Turn off VLAN and clear the VLAN filter. */
        !           562:        writel(0x04000000, ioaddr + VLANetherType);
        !           563:        for (i = 0x600; i < 0x800; i+=4)
        !           564:                writel(0, ioaddr + i);
        !           565:        np->tx_config = 0x80000020;
        !           566:        writel(np->tx_config, ioaddr + TxConfigReg);
        !           567:        {
        !           568:                int eeword10 = eeprom_read(ioaddr, 10);
        !           569:                writel(((eeword10 & 0x01e0) << 17) | ((eeword10 & 0x0010) << 3),
        !           570:                           ioaddr + ChipCtrl);
        !           571:        }
        !           572: 
        !           573:        return dev;
        !           574: }
        !           575: 
        !           576: 
        !           577: /* Read the EEPROM interface with a serial bit streams generated by the
        !           578:    host processor. 
        !           579:    The example below is for the common 93c46 EEPROM, 64 16 bit words. */
        !           580: 
        !           581: /* Delay between EEPROM clock transitions.
        !           582:    The effectivly flushes the write cache to prevent quick double-writes.
        !           583: */
        !           584: #define eeprom_delay(ee_addr)  readl(ee_addr)
        !           585: 
        !           586: enum EEPROM_Ctrl_Bits {
        !           587:        EE_ShiftClk=0x01, EE_ChipSelect=0x02, EE_DataIn=0x08, EE_DataOut=0x04,
        !           588: };
        !           589: #define EE_Write0 (EE_ChipSelect)
        !           590: #define EE_Write1 (EE_ChipSelect | EE_DataOut)
        !           591: 
        !           592: /* The EEPROM commands include the alway-set leading bit. */
        !           593: enum EEPROM_Cmds { EE_WriteCmd=5, EE_ReadCmd=6, EE_EraseCmd=7, };
        !           594: 
        !           595: static int eeprom_read(long addr, int location)
        !           596: {
        !           597:        int i;
        !           598:        int retval = 0;
        !           599:        long ee_addr = addr + EECtrl;
        !           600:        int read_cmd = ((EE_ReadCmd<<6) | location) << 16 ;
        !           601:        int cmd_len = 2+6+16;
        !           602:        u32 baseval = readl(ee_addr) & ~0x0f;
        !           603: 
        !           604:        writel(EE_Write0 | baseval, ee_addr);
        !           605: 
        !           606:        /* Shift the read command bits out. */
        !           607:        for (i = cmd_len; i >= 0; i--) {
        !           608:                int dataval = baseval |
        !           609:                        ((read_cmd & (1 << i)) ? EE_Write1 : EE_Write0);
        !           610:                writel(dataval, ee_addr);
        !           611:                eeprom_delay(ee_addr);
        !           612:                writel(dataval | EE_ShiftClk, ee_addr);
        !           613:                eeprom_delay(ee_addr);
        !           614:                retval = (retval << 1) | ((readl(ee_addr) & EE_DataIn) ? 1 : 0);
        !           615:        }
        !           616: 
        !           617:        /* Terminate the EEPROM access. */
        !           618:        writel(baseval | EE_Write0, ee_addr);
        !           619:        writel(baseval & ~EE_ChipSelect, ee_addr);
        !           620:        return retval;
        !           621: }
        !           622: 
        !           623: 
        !           624: 
        !           625: static int netdev_open(struct net_device *dev)
        !           626: {
        !           627:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           628:        long ioaddr = dev->base_addr;
        !           629: 
        !           630:        /* Some chips may need to be reset. */
        !           631: 
        !           632:        MOD_INC_USE_COUNT;
        !           633: 
        !           634:        if (np->tx_ring == 0)
        !           635:                np->tx_ring = (void *)get_free_page(GFP_KERNEL);
        !           636:        if (np->tx_ring == 0)
        !           637:                return -ENOMEM;
        !           638:        if (np->rx_ring == 0)
        !           639:                np->rx_ring = (void *)get_free_page(GFP_KERNEL);
        !           640:        if (np->tx_ring == 0) {
        !           641:                free_page((long)np->tx_ring);
        !           642:                return -ENOMEM;
        !           643:        }
        !           644: 
        !           645:        /* Note that both request_irq() and init_ring() call kmalloc(), which
        !           646:           break the global kernel lock protecting this routine. */
        !           647:        if (request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev)) {
        !           648:                MOD_DEC_USE_COUNT;
        !           649:                return -EAGAIN;
        !           650:        }
        !           651: 
        !           652:        if (np->msg_level & NETIF_MSG_IFUP)
        !           653:                printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
        !           654:                           dev->name, dev->irq);
        !           655: 
        !           656:        init_ring(dev);
        !           657: 
        !           658:        writel(0, ioaddr + RxControl);
        !           659:        writel(virt_to_bus(np->rx_ring), ioaddr + RxRingPtr);
        !           660: #if ADDRLEN == 64
        !           661:        writel(virt_to_bus(np->rx_ring) >> 32, ioaddr + RxRingPtr + 4);
        !           662: #else
        !           663:        writel(0, ioaddr + RxRingPtr + 4);
        !           664: #endif
        !           665: 
        !           666:        writel(RX_RING_SIZE * sizeof(struct rx_desc), ioaddr + RxRingLen);
        !           667:        writel(0x80000000 | rx_intr_holdoff, ioaddr + RxQ0IntrDelay);
        !           668:        writel(0, ioaddr + RxDescHead);
        !           669:        writel(np->dirty_rx + RX_RING_SIZE, ioaddr + RxDescTail);
        !           670: 
        !           671:        /* Zero the unused Rx ring #1. */
        !           672:        writel(0, ioaddr + RxQ1IntrDelay);
        !           673:        writel(0, ioaddr + RxRing1Ptr);
        !           674:        writel(0, ioaddr + RxRing1Ptr + 4);
        !           675:        writel(0, ioaddr + RxRing1Len);
        !           676:        writel(0, ioaddr + RxDesc1Head);
        !           677:        writel(0, ioaddr + RxDesc1Tail);
        !           678: 
        !           679:        /* Use 0x002000FA for half duplex. */
        !           680:        writel(0x000400FA, ioaddr + TxControl);
        !           681: 
        !           682:        writel(virt_to_bus(np->tx_ring), ioaddr + TxRingPtr);
        !           683: #if ADDRLEN == 64
        !           684:        writel(virt_to_bus(np->tx_ring) >> 32, ioaddr + TxRingPtr + 4);
        !           685: #else
        !           686:        writel(0, ioaddr + TxRingPtr + 4);
        !           687: #endif
        !           688: 
        !           689:        writel(TX_RING_SIZE * sizeof(struct tx_desc), ioaddr + TxRingLen);
        !           690:        writel(0, ioaddr + TxDescHead);
        !           691:        writel(0, ioaddr + TxDescTail);
        !           692:        writel(0, ioaddr + TxQState);
        !           693:        writel(0, ioaddr + TxQState + 4);
        !           694: 
        !           695:        /* Set IPG register with Ethernet standard values. */
        !           696:        writel(0x00A0080A, ioaddr + TxIPG);
        !           697:        /* The delay before announcing a Tx has completed. */
        !           698:        writel(tx_intr_holdoff, ioaddr + TxIntrDelay);
        !           699: 
        !           700:        writel(((u32*)dev->dev_addr)[0], ioaddr + RxAddrCAM);
        !           701:        writel(0x80000000 | ((((u32*)dev->dev_addr)[1]) & 0xffff),
        !           702:                   ioaddr + RxAddrCAM + 4);
        !           703: 
        !           704:        /* Initialize other registers. */
        !           705:        /* Configure the PCI bus bursts and FIFO thresholds. */
        !           706: 
        !           707:        if (dev->if_port == 0)
        !           708:                dev->if_port = np->default_port;
        !           709: 
        !           710:        np->in_interrupt = 0;
        !           711: 
        !           712:        np->rx_mode = RxCtrlEnable;
        !           713:        set_rx_mode(dev);
        !           714: 
        !           715:        /* Tx mode */
        !           716:        np->tx_config = 0x80000020;
        !           717:        writel(np->tx_config, ioaddr + TxConfigReg);
        !           718: 
        !           719:        /* Flow control */
        !           720:        writel(0x00C28001, ioaddr + FlowCtrlAddrLo);
        !           721:        writel(0x00000100, ioaddr + FlowCtrlAddrHi);
        !           722:        writel(0x8808, ioaddr + FlowCtrlType);
        !           723:        writel(0x0100, ioaddr + FlowCtrlTimer);
        !           724:        writel(0x8000, ioaddr + FlowCtrlThrshHi);
        !           725:        writel(0x4000, ioaddr + FlowCtrlThrshLo);
        !           726: 
        !           727:        netif_start_tx_queue(dev);
        !           728: 
        !           729:        /* Enable interrupts by setting the interrupt mask. */
        !           730:        writel(IntrTxDone | IntrLinkChange | IntrRxDone | IntrPCIErr
        !           731:                   | IntrRxEmpty | IntrRxSErr, ioaddr + IntrEnable);
        !           732: 
        !           733:        /*      writel(1, dev->base_addr + RxCmd);*/
        !           734: 
        !           735:        if (np->msg_level & NETIF_MSG_IFUP)
        !           736:                printk(KERN_DEBUG "%s: Done netdev_open(), status: %x Rx %x Tx %x.\n",
        !           737:                           dev->name, (int)readl(ioaddr + ChipStatus),
        !           738:                           (int)readl(ioaddr + RxStatus), (int)readl(ioaddr + TxStatus));
        !           739: 
        !           740:        /* Set the timer to check for link beat. */
        !           741:        init_timer(&np->timer);
        !           742:        np->timer.expires = jiffies + 3*HZ;
        !           743:        np->timer.data = (unsigned long)dev;
        !           744:        np->timer.function = &netdev_timer;                             /* timer handler */
        !           745:        add_timer(&np->timer);
        !           746: 
        !           747:        return 0;
        !           748: }
        !           749: 
        !           750: /* Update for jumbo frames...
        !           751:    Changing the MTU while active is not allowed.
        !           752:  */
        !           753: static int change_mtu(struct net_device *dev, int new_mtu)
        !           754: {
        !           755:        if ((new_mtu < 68) || (new_mtu > 1500))
        !           756:                return -EINVAL;
        !           757:        if (netif_running(dev))
        !           758:                return -EBUSY;
        !           759:        dev->mtu = new_mtu;
        !           760:        return 0;
        !           761: }
        !           762: 
        !           763: static void check_duplex(struct net_device *dev)
        !           764: {
        !           765:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           766:        long ioaddr = dev->base_addr;
        !           767:        int chip_ctrl = readl(ioaddr + ChipCtrl);
        !           768:        int rx_cfg = readl(ioaddr + RxConfigReg);
        !           769:        int tx_cfg = readl(ioaddr + TxConfigReg);
        !           770: #if 0
        !           771:        int chip_status = readl(ioaddr + ChipStatus);
        !           772: #endif
        !           773: 
        !           774:        if (np->msg_level & NETIF_MSG_LINK)
        !           775:                printk(KERN_DEBUG "%s:  Link changed status.  Ctrl %x rxcfg %8.8x "
        !           776:                           "txcfg %8.8x.\n",
        !           777:                           dev->name, chip_ctrl, rx_cfg, tx_cfg);
        !           778:        if (np->medialock) {
        !           779:                if (np->full_duplex)
        !           780:                        ;
        !           781:        }
        !           782:        /* writew(new_tx_mode, ioaddr + TxMode); */
        !           783: }
        !           784: 
        !           785: static void netdev_timer(unsigned long data)
        !           786: {
        !           787:        struct net_device *dev = (struct net_device *)data;
        !           788:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           789:        long ioaddr = dev->base_addr;
        !           790:        int next_tick = 10*HZ;
        !           791: 
        !           792:        if (np->msg_level & NETIF_MSG_TIMER) {
        !           793:                printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x, "
        !           794:                           "Tx %x Rx %x.\n",
        !           795:                           dev->name, (int)readl(ioaddr + ChipStatus),
        !           796:                           (int)readl(ioaddr + TxStatus), (int)readl(ioaddr + RxStatus));
        !           797:        }
        !           798:        /* This will either have a small false-trigger window or will not catch
        !           799:           tbusy incorrectly set when the queue is empty. */
        !           800:        if ((jiffies - dev->trans_start) > TX_TIMEOUT  &&
        !           801:                (np->cur_tx - np->dirty_tx > 0  ||
        !           802:                 netif_queue_paused(dev)) ) {
        !           803:                tx_timeout(dev);
        !           804:        }
        !           805:        check_duplex(dev);
        !           806:        np->timer.expires = jiffies + next_tick;
        !           807:        add_timer(&np->timer);
        !           808: }
        !           809: 
        !           810: static void tx_timeout(struct net_device *dev)
        !           811: {
        !           812:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           813:        long ioaddr = dev->base_addr;
        !           814: 
        !           815:        printk(KERN_WARNING "%s: Transmit timed out, status %8.8x,"
        !           816:                   " resetting...\n", dev->name, (int)readl(ioaddr + ChipStatus));
        !           817: 
        !           818: #ifndef __alpha__
        !           819:        if (np->msg_level & NETIF_MSG_TX_ERR) {
        !           820:                int i;
        !           821:                printk(KERN_DEBUG "  Tx registers: ");
        !           822:                for (i = 0x400; i < 0x444; i += 8)
        !           823:                        printk(" %8.8x", (int)readl(ioaddr + i));
        !           824:                printk("\n"KERN_DEBUG "  Rx ring %p: ", np->rx_ring);
        !           825:                for (i = 0; i < RX_RING_SIZE; i++)
        !           826:                        printk(" %8.8x", (unsigned int)np->rx_ring[i].status);
        !           827:                printk("\n"KERN_DEBUG"  Tx ring %p: ", np->tx_ring);
        !           828:                for (i = 0; i < TX_RING_SIZE; i++)
        !           829:                        printk(" %4.4x", np->tx_ring[i].status);
        !           830:                printk("\n");
        !           831:        }
        !           832: #endif
        !           833: 
        !           834:        /* Perhaps we should reinitialize the hardware here. */
        !           835:        dev->if_port = 0;
        !           836:        /* Stop and restart the chip's Tx processes . */
        !           837: 
        !           838:        /* Trigger an immediate transmit demand. */
        !           839: 
        !           840:        dev->trans_start = jiffies;
        !           841:        np->stats.tx_errors++;
        !           842:        return;
        !           843: }
        !           844: 
        !           845: 
        !           846: /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
        !           847: static void init_ring(struct net_device *dev)
        !           848: {
        !           849:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           850:        int i;
        !           851: 
        !           852:        np->tx_full = 0;
        !           853:        np->cur_rx = np->cur_tx = 0;
        !           854:        np->dirty_rx = np->dirty_tx = 0;
        !           855: 
        !           856:        np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
        !           857:        np->rx_head_desc = &np->rx_ring[0];
        !           858: 
        !           859:        /* Initialize all Rx descriptors. */
        !           860:        for (i = 0; i < RX_RING_SIZE; i++) {
        !           861:                np->rx_skbuff[i] = 0;
        !           862:        }
        !           863: 
        !           864:        /* The number of ring descriptors is set by the ring length register,
        !           865:           thus the chip does not use 'next_desc' chains. */
        !           866: 
        !           867:        /* Fill in the Rx buffers.  Allocation failures are acceptable. */
        !           868:        for (i = 0; i < RX_RING_SIZE; i++) {
        !           869:                struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
        !           870:                np->rx_skbuff[i] = skb;
        !           871:                if (skb == NULL)
        !           872:                        break;
        !           873:                skb->dev = dev;                 /* Mark as being used by this device. */
        !           874:                skb_reserve(skb, 2);    /* 16 byte align the IP header. */
        !           875:                np->rx_ring[i].buf_addr = virt_to_le32desc(skb->tail);
        !           876:                np->rx_ring[i].buf_addr_hi = 0;
        !           877:                np->rx_ring[i].status = 0;
        !           878:        }
        !           879:        np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
        !           880: 
        !           881:        for (i = 0; i < TX_RING_SIZE; i++) {
        !           882:                np->tx_skbuff[i] = 0;
        !           883:                np->tx_ring[i].status = 0;
        !           884:        }
        !           885:        return;
        !           886: }
        !           887: 
        !           888: static int start_tx(struct sk_buff *skb, struct net_device *dev)
        !           889: {
        !           890:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           891:        unsigned entry;
        !           892: 
        !           893:        /* Block a timer-based transmit from overlapping.  This happens when
        !           894:           packets are presumed lost, and we use this check the Tx status. */
        !           895:        if (netif_pause_tx_queue(dev) != 0) {
        !           896:                /* This watchdog code is redundant with the media monitor timer. */
        !           897:                if (jiffies - dev->trans_start > TX_TIMEOUT)
        !           898:                        tx_timeout(dev);
        !           899:                return 1;
        !           900:        }
        !           901: 
        !           902:        /* Calculate the next Tx descriptor entry. */
        !           903:        entry = np->cur_tx % TX_RING_SIZE;
        !           904: 
        !           905:        np->tx_skbuff[entry] = skb;
        !           906: 
        !           907:        /* Note: Descriptors may be uncached.  Write each field only once. */
        !           908:        np->tx_ring[entry].buf_addr = virt_to_le32desc(skb->data);
        !           909:        np->tx_ring[entry].buf_addr_hi = 0;
        !           910:        np->tx_ring[entry].cmd_length = cpu_to_le32(TxCmdDoTx | skb->len);
        !           911:        np->tx_ring[entry].status = 0;
        !           912: 
        !           913:        /* Non-CC architectures: explicitly flush descriptor and packet.
        !           914:           cache_flush(np->tx_ring[entry], sizeof np->tx_ring[entry]);
        !           915:           cache_flush(skb->data, skb->len);
        !           916:        */
        !           917: 
        !           918:        np->cur_tx++;
        !           919:        if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
        !           920:                np->tx_full = 1;
        !           921:                /* Check for a just-cleared queue. */
        !           922:                if (np->cur_tx - (volatile int)np->dirty_tx < TX_QUEUE_LEN - 2) {
        !           923:                        netif_unpause_tx_queue(dev);
        !           924:                        np->tx_full = 0;
        !           925:                } else
        !           926:                        netif_stop_tx_queue(dev);
        !           927:        } else
        !           928:                netif_unpause_tx_queue(dev);            /* Typical path */
        !           929: 
        !           930:        /* Inform the chip we have another Tx. */
        !           931:        if (np->msg_level & NETIF_MSG_TX_QUEUED)
        !           932:                printk(KERN_DEBUG "%s: Tx queued to slot %d, desc tail now %d "
        !           933:                           "writing %d.\n",
        !           934:                           dev->name, entry, (int)readl(dev->base_addr + TxDescTail),
        !           935:                           np->cur_tx % TX_RING_SIZE);
        !           936:        writel(np->cur_tx % TX_RING_SIZE, dev->base_addr + TxDescTail);
        !           937: 
        !           938:        dev->trans_start = jiffies;
        !           939: 
        !           940:        if (np->msg_level & NETIF_MSG_TX_QUEUED) {
        !           941:                printk(KERN_DEBUG "%s: Transmit frame #%d (%x) queued in slot %d.\n",
        !           942:                           dev->name, np->cur_tx, (int)virt_to_bus(&np->tx_ring[entry]),
        !           943:                           entry);
        !           944:        }
        !           945:        return 0;
        !           946: }
        !           947: 
        !           948: /* The interrupt handler does all of the Rx thread work and cleans up
        !           949:    after the Tx thread. */
        !           950: static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
        !           951: {
        !           952:        struct net_device *dev = (struct net_device *)dev_instance;
        !           953:        struct netdev_private *np;
        !           954:        long ioaddr;
        !           955:        int work_limit;
        !           956: 
        !           957:        ioaddr = dev->base_addr;
        !           958:        np = (struct netdev_private *)dev->priv;
        !           959:        work_limit = np->max_interrupt_work;
        !           960: 
        !           961: #if defined(__i386__)  &&  LINUX_VERSION_CODE < 0x020300
        !           962:        /* A lock to prevent simultaneous entry bug on Intel SMP machines. */
        !           963:        if (test_and_set_bit(0, (void*)&dev->interrupt)) {
        !           964:                printk(KERN_ERR"%s: SMP simultaneous entry of an interrupt handler.\n",
        !           965:                           dev->name);
        !           966:                dev->interrupt = 0;     /* Avoid halting machine. */
        !           967:                return;
        !           968:        }
        !           969: #endif
        !           970: 
        !           971:        do {
        !           972:                u32 intr_status = readl(ioaddr + IntrStatus);
        !           973: 
        !           974:                if (np->msg_level & NETIF_MSG_INTR)
        !           975:                        printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
        !           976:                                   dev->name, intr_status);
        !           977: 
        !           978:                if (intr_status == 0 || intr_status == 0xffffffff)
        !           979:                        break;
        !           980: 
        !           981:                if (intr_status & IntrRxDone)
        !           982:                        netdev_rx(dev);
        !           983: 
        !           984:                for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
        !           985:                        int entry = np->dirty_tx % TX_RING_SIZE;
        !           986:                        if (np->tx_ring[entry].status == 0)
        !           987:                                break;
        !           988:                        if (np->msg_level & NETIF_MSG_TX_DONE)
        !           989:                                printk(KERN_DEBUG "%s: Transmit done, Tx status %8.8x.\n",
        !           990:                                           dev->name, np->tx_ring[entry].status);
        !           991:                        np->stats.tx_packets++;
        !           992: #if LINUX_VERSION_CODE > 0x20127
        !           993:                        np->stats.tx_bytes += np->tx_skbuff[entry]->len;
        !           994: #endif
        !           995:                        /* Free the original skb. */
        !           996:                        dev_free_skb_irq(np->tx_skbuff[entry]);
        !           997:                        np->tx_skbuff[entry] = 0;
        !           998:                }
        !           999:                /* Note the 4 slot hysteresis to mark the queue non-full. */
        !          1000:                if (np->tx_full  &&  np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
        !          1001:                        /* The ring is no longer full, allow new TX entries. */
        !          1002:                        np->tx_full = 0;
        !          1003:                        netif_resume_tx_queue(dev);
        !          1004:                }
        !          1005: 
        !          1006:                /* Abnormal error summary/uncommon events handlers. */
        !          1007:                if (intr_status & (IntrPCIErr | IntrLinkChange | StatsMax))
        !          1008:                        netdev_error(dev, intr_status);
        !          1009: 
        !          1010:                if (--work_limit < 0) {
        !          1011:                        printk(KERN_WARNING "%s: Too much work at interrupt, "
        !          1012:                                   "status=0x%4.4x.\n",
        !          1013:                                   dev->name, intr_status);
        !          1014:                        break;
        !          1015:                }
        !          1016:        } while (1);
        !          1017: 
        !          1018:        if (np->msg_level & NETIF_MSG_INTR)
        !          1019:                printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
        !          1020:                           dev->name, (int)readl(ioaddr + IntrStatus));
        !          1021: 
        !          1022: #if defined(__i386__)  &&  LINUX_VERSION_CODE < 0x020300
        !          1023:        clear_bit(0, (void*)&dev->interrupt);
        !          1024: #endif
        !          1025:        return;
        !          1026: }
        !          1027: 
        !          1028: /* This routine is logically part of the interrupt handler, but separated
        !          1029:    for clarity and better register allocation. */
        !          1030: static int netdev_rx(struct net_device *dev)
        !          1031: {
        !          1032:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1033:        int entry = np->cur_rx % RX_RING_SIZE;
        !          1034:        int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
        !          1035: 
        !          1036:        if (np->msg_level & NETIF_MSG_RX_STATUS) {
        !          1037:                printk(KERN_DEBUG " In netdev_rx(), entry %d status %4.4x.\n",
        !          1038:                           entry, np->rx_ring[entry].status);
        !          1039:        }
        !          1040: 
        !          1041:        /* If EOP is set on the next entry, it's a new packet. Send it up. */
        !          1042:        while (np->rx_head_desc->status & cpu_to_le32(RxDescDone)) {
        !          1043:                struct rx_desc *desc = np->rx_head_desc;
        !          1044:                u32 desc_status = le32_to_cpu(desc->status);
        !          1045:                int data_size = le32_to_cpu(desc->csum_length);
        !          1046: 
        !          1047:                if (np->msg_level & NETIF_MSG_RX_STATUS)
        !          1048:                        printk(KERN_DEBUG "  netdev_rx() status was %8.8x.\n",
        !          1049:                                   desc_status);
        !          1050:                if (--boguscnt < 0)
        !          1051:                        break;
        !          1052:                if ( ! (desc_status & RxDescEndPkt)) {
        !          1053:                        printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
        !          1054:                                   "multiple buffers, entry %#x length %d status %4.4x!\n",
        !          1055:                                   dev->name, np->cur_rx, data_size, desc_status);
        !          1056:                        np->stats.rx_length_errors++;
        !          1057:                } else {
        !          1058:                        struct sk_buff *skb;
        !          1059:                        /* Reported length should omit the CRC. */
        !          1060:                        int pkt_len = (data_size & 0xffff) - 4;
        !          1061: 
        !          1062: #ifndef final_version
        !          1063:                        if (np->msg_level & NETIF_MSG_RX_STATUS)
        !          1064:                                printk(KERN_DEBUG "  netdev_rx() normal Rx pkt length %d"
        !          1065:                                           " of %d, bogus_cnt %d.\n",
        !          1066:                                           pkt_len, data_size, boguscnt);
        !          1067: #endif
        !          1068:                        /* Check if the packet is long enough to accept without copying
        !          1069:                           to a minimally-sized skbuff. */
        !          1070:                        if (pkt_len < np->rx_copybreak
        !          1071:                                && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
        !          1072:                                skb->dev = dev;
        !          1073:                                skb_reserve(skb, 2);    /* 16 byte align the IP header */
        !          1074: #if HAS_IP_COPYSUM                     /* Call copy + cksum if available. */
        !          1075:                                eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
        !          1076:                                skb_put(skb, pkt_len);
        !          1077: #else
        !          1078:                                memcpy(skb_put(skb, pkt_len), np->rx_skbuff[entry]->tail,
        !          1079:                                           pkt_len);
        !          1080: #endif
        !          1081:                        } else {
        !          1082:                                char *temp = skb_put(skb = np->rx_skbuff[entry], pkt_len);
        !          1083:                                np->rx_skbuff[entry] = NULL;
        !          1084: #ifndef final_version                          /* Remove after testing. */
        !          1085:                                if (le32desc_to_virt(np->rx_ring[entry].buf_addr) != temp)
        !          1086:                                        printk(KERN_ERR "%s: Internal fault: The skbuff addresses "
        !          1087:                                                   "do not match in netdev_rx: %p vs. %p / %p.\n",
        !          1088:                                                   dev->name,
        !          1089:                                                   le32desc_to_virt(np->rx_ring[entry].buf_addr),
        !          1090:                                                   skb->head, temp);
        !          1091: #endif
        !          1092:                        }
        !          1093: #ifndef final_version                          /* Remove after testing. */
        !          1094:                        /* You will want this info for the initial debug. */
        !          1095:                        if (np->msg_level & NETIF_MSG_PKTDATA)
        !          1096:                                printk(KERN_DEBUG "  Rx data %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:"
        !          1097:                                           "%2.2x %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x %2.2x%2.2x "
        !          1098:                                           "%d.%d.%d.%d.\n",
        !          1099:                                           skb->data[0], skb->data[1], skb->data[2], skb->data[3],
        !          1100:                                           skb->data[4], skb->data[5], skb->data[6], skb->data[7],
        !          1101:                                           skb->data[8], skb->data[9], skb->data[10],
        !          1102:                                           skb->data[11], skb->data[12], skb->data[13],
        !          1103:                                           skb->data[14], skb->data[15], skb->data[16],
        !          1104:                                           skb->data[17]);
        !          1105: #endif
        !          1106:                        skb->protocol = eth_type_trans(skb, dev);
        !          1107:                        /* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
        !          1108:                        netif_rx(skb);
        !          1109:                        dev->last_rx = jiffies;
        !          1110:                        np->stats.rx_packets++;
        !          1111: #if LINUX_VERSION_CODE > 0x20127
        !          1112:                        np->stats.rx_bytes += pkt_len;
        !          1113: #endif
        !          1114:                }
        !          1115:                entry = (++np->cur_rx) % RX_RING_SIZE;
        !          1116:                np->rx_head_desc = &np->rx_ring[entry];
        !          1117:        }
        !          1118: 
        !          1119:        /* Refill the Rx ring buffers. */
        !          1120:        for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
        !          1121:                struct sk_buff *skb;
        !          1122:                entry = np->dirty_rx % RX_RING_SIZE;
        !          1123:                if (np->rx_skbuff[entry] == NULL) {
        !          1124:                        skb = dev_alloc_skb(np->rx_buf_sz);
        !          1125:                        np->rx_skbuff[entry] = skb;
        !          1126:                        if (skb == NULL)
        !          1127:                                break;                          /* Better luck next round. */
        !          1128:                        skb->dev = dev;                 /* Mark as being used by this device. */
        !          1129:                        skb_reserve(skb, 2);    /* Align IP on 16 byte boundaries */
        !          1130:                        np->rx_ring[entry].buf_addr = virt_to_le32desc(skb->tail);
        !          1131:                }
        !          1132:                np->rx_ring[entry].status = 0;
        !          1133:        }
        !          1134: 
        !          1135:        /* Restart Rx engine if stopped. */
        !          1136:        /* writel(1, dev->base_addr + RxCmd); */
        !          1137:        return 0;
        !          1138: }
        !          1139: 
        !          1140: static void netdev_error(struct net_device *dev, int intr_status)
        !          1141: {
        !          1142:        long ioaddr = dev->base_addr;
        !          1143:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1144: 
        !          1145:        if (intr_status & IntrLinkChange) {
        !          1146:                int chip_ctrl = readl(ioaddr + ChipCtrl);
        !          1147:                if (np->msg_level & NETIF_MSG_LINK)
        !          1148:                        printk(KERN_ERR "%s: Link changed: Autonegotiation on-going.\n",
        !          1149:                                   dev->name);
        !          1150:                if (chip_ctrl & 1)
        !          1151:                        netif_link_up(dev);
        !          1152:                else
        !          1153:                        netif_link_down(dev);
        !          1154:                check_duplex(dev);
        !          1155:        }
        !          1156:        if (intr_status & StatsMax) {
        !          1157:                get_stats(dev);
        !          1158:        }
        !          1159:        if ((intr_status & ~(IntrLinkChange|StatsMax))
        !          1160:                && (np->msg_level & NETIF_MSG_DRV))
        !          1161:                printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
        !          1162:                           dev->name, intr_status);
        !          1163:        /* Hmmmmm, it's not clear how to recover from PCI faults. */
        !          1164:        if (intr_status & IntrPCIErr)
        !          1165:                np->stats.tx_fifo_errors++;
        !          1166: }
        !          1167: 
        !          1168: static struct net_device_stats *get_stats(struct net_device *dev)
        !          1169: {
        !          1170:        long ioaddr = dev->base_addr;
        !          1171:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1172:        int crc_errs = readl(ioaddr + RxCRCErrs);
        !          1173: 
        !          1174:        if (crc_errs != 0xffffffff) {
        !          1175:                /* We need not lock this segment of code for SMP.
        !          1176:                   The non-atomic-add vulnerability is very small
        !          1177:                   and statistics are non-critical. */
        !          1178:                np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
        !          1179:                np->stats.rx_missed_errors      += readl(ioaddr + RxMissed);
        !          1180:        }
        !          1181: 
        !          1182:        return &np->stats;
        !          1183: }
        !          1184: 
        !          1185: /* The little-endian AUTODIN II ethernet CRC calculations.
        !          1186:    A big-endian version is also available.
        !          1187:    This is slow but compact code.  Do not use this routine for bulk data,
        !          1188:    use a table-based routine instead.
        !          1189:    This is common code and should be moved to net/core/crc.c.
        !          1190:    Chips may use the upper or lower CRC bits, and may reverse and/or invert
        !          1191:    them.  Select the endian-ness that results in minimal calculations.
        !          1192: */
        !          1193: static unsigned const ethernet_polynomial_le = 0xedb88320U;
        !          1194: static inline unsigned ether_crc_le(int length, unsigned char *data)
        !          1195: {
        !          1196:        unsigned int crc = 0xffffffff;  /* Initial value. */
        !          1197:        while(--length >= 0) {
        !          1198:                unsigned char current_octet = *data++;
        !          1199:                int bit;
        !          1200:                for (bit = 8; --bit >= 0; current_octet >>= 1) {
        !          1201:                        if ((crc ^ current_octet) & 1) {
        !          1202:                                crc >>= 1;
        !          1203:                                crc ^= ethernet_polynomial_le;
        !          1204:                        } else
        !          1205:                                crc >>= 1;
        !          1206:                }
        !          1207:        }
        !          1208:        return crc;
        !          1209: }
        !          1210: 
        !          1211: static void set_rx_mode(struct net_device *dev)
        !          1212: {
        !          1213:        long ioaddr = dev->base_addr;
        !          1214:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1215:        u32 new_mc_filter[128];                 /* Multicast filter table */
        !          1216:        u32 new_rx_mode = np->rx_mode;
        !          1217: 
        !          1218:        if (dev->flags & IFF_PROMISC) {                 /* Set promiscuous. */
        !          1219:                /* Unconditionally log net taps. */
        !          1220:                printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
        !          1221:                new_rx_mode |=
        !          1222:                        RxCtrlAcceptBroadcast | RxCtrlAllMulticast | RxCtrlAllUnicast;
        !          1223:        } else if ((dev->mc_count > np->multicast_filter_limit)
        !          1224:                           ||  (dev->flags & IFF_ALLMULTI)) {
        !          1225:                /* Too many to match, or accept all multicasts. */
        !          1226:                new_rx_mode &= ~RxCtrlAllUnicast;
        !          1227:                new_rx_mode |= RxCtrlAcceptBroadcast | RxCtrlAllMulticast;
        !          1228:        } else {
        !          1229:                struct dev_mc_list *mclist;
        !          1230:                int i;
        !          1231:                memset(new_mc_filter, 0, sizeof(new_mc_filter));
        !          1232:                for (i = 0, mclist = dev->mc_list; mclist && i < 15;
        !          1233:                         i++, mclist = mclist->next) {
        !          1234:                        writel(((u32*)mclist->dmi_addr)[0], ioaddr + RxAddrCAM + 8 + i*8);
        !          1235:                        writel((((u32*)mclist->dmi_addr)[1] & 0xffff) | 0x80000000,
        !          1236:                                   ioaddr + RxAddrCAM + 12 + i*8);
        !          1237:                }
        !          1238:                for (; mclist && i < dev->mc_count; i++, mclist = mclist->next) {
        !          1239:                        set_bit(((u32*)mclist->dmi_addr)[1] & 0xfff,
        !          1240:                                        new_mc_filter);
        !          1241:                }
        !          1242:                new_rx_mode &= ~RxCtrlAllUnicast | RxCtrlAllMulticast;
        !          1243:                new_rx_mode |= RxCtrlAcceptBroadcast;
        !          1244:                if (dev->mc_count > 15)
        !          1245:                        for (i = 0; i < 128; i++)
        !          1246:                                writel(new_mc_filter[i], ioaddr + MulticastArray + (i<<2));
        !          1247:        }
        !          1248:        if (np->rx_mode != new_rx_mode)
        !          1249:                writel(np->rx_mode = new_rx_mode, ioaddr + RxControl);
        !          1250: }
        !          1251: 
        !          1252: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
        !          1253: {
        !          1254:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1255:        u32 *data32 = (void *)&rq->ifr_data;
        !          1256: 
        !          1257:        switch(cmd) {
        !          1258:        case SIOCGPARAMS:
        !          1259:                data32[0] = np->msg_level;
        !          1260:                data32[1] = np->multicast_filter_limit;
        !          1261:                data32[2] = np->max_interrupt_work;
        !          1262:                data32[3] = np->rx_copybreak;
        !          1263:                return 0;
        !          1264:        case SIOCSPARAMS:
        !          1265:                if (!capable(CAP_NET_ADMIN))
        !          1266:                        return -EPERM;
        !          1267:                np->msg_level = data32[0];
        !          1268:                np->multicast_filter_limit = data32[1];
        !          1269:                np->max_interrupt_work = data32[2];
        !          1270:                np->rx_copybreak = data32[3];
        !          1271:                return 0;
        !          1272:        default:
        !          1273:                return -EOPNOTSUPP;
        !          1274:        }
        !          1275: }
        !          1276: 
        !          1277: static int netdev_close(struct net_device *dev)
        !          1278: {
        !          1279:        long ioaddr = dev->base_addr;
        !          1280:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1281:        int i;
        !          1282: 
        !          1283:        netif_stop_tx_queue(dev);
        !          1284: 
        !          1285:        if (np->msg_level & NETIF_MSG_IFDOWN) {
        !          1286:                printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x "
        !          1287:                           "Rx %4.4x Int %2.2x.\n",
        !          1288:                           dev->name, (int)readl(ioaddr + TxStatus),
        !          1289:                           (int)readl(ioaddr + RxStatus), (int)readl(ioaddr + IntrStatus));
        !          1290:                printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d,  Rx %d / %d.\n",
        !          1291:                           dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
        !          1292:        }
        !          1293: 
        !          1294:        /* Disable interrupts by clearing the interrupt mask. */
        !          1295:        writel(~0, ioaddr + IntrDisable);
        !          1296:        readl(ioaddr + IntrStatus);
        !          1297: 
        !          1298:        /* Reset everything. */
        !          1299:        writel(0x04000000, ioaddr + ChipCtrl);
        !          1300: 
        !          1301:        del_timer(&np->timer);
        !          1302: 
        !          1303: #ifdef __i386__
        !          1304:        if (np->msg_level & NETIF_MSG_IFDOWN) {
        !          1305:                printk("\n"KERN_DEBUG"  Tx ring at %8.8x:\n",
        !          1306:                           (int)virt_to_bus(np->tx_ring));
        !          1307:                for (i = 0; i < TX_RING_SIZE; i++)
        !          1308:                        printk(" #%d desc. buf %8.8x, length %8.8x, status %8.8x.\n",
        !          1309:                                   i, np->tx_ring[i].buf_addr, np->tx_ring[i].cmd_length,
        !          1310:                                   np->tx_ring[i].status);
        !          1311:                printk("\n"KERN_DEBUG "  Rx ring %8.8x:\n",
        !          1312:                           (int)virt_to_bus(np->rx_ring));
        !          1313:                for (i = 0; i < RX_RING_SIZE; i++) {
        !          1314:                        printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
        !          1315:                                   i, np->rx_ring[i].csum_length,
        !          1316:                                   np->rx_ring[i].status, np->rx_ring[i].buf_addr);
        !          1317:                        if (np->rx_ring[i].buf_addr) {
        !          1318:                                if (*(u8*)np->rx_skbuff[i]->tail != 0x69) {
        !          1319:                                        u16 *pkt_buf = (void *)np->rx_skbuff[i]->tail;
        !          1320:                                        int j;
        !          1321:                                        for (j = 0; j < 0x50; j++)
        !          1322:                                                printk(" %4.4x", pkt_buf[j]);
        !          1323:                                        printk("\n");
        !          1324:                                }
        !          1325:                        }
        !          1326:                }
        !          1327:        }
        !          1328: #endif /* __i386__ debugging only */
        !          1329: 
        !          1330:        free_irq(dev->irq, dev);
        !          1331: 
        !          1332:        /* Free all the skbuffs in the Rx queue. */
        !          1333:        for (i = 0; i < RX_RING_SIZE; i++) {
        !          1334:                np->rx_ring[i].status = 0;
        !          1335:                np->rx_ring[i].buf_addr = 0xBADF00D0; /* An invalid address. */
        !          1336:                if (np->rx_skbuff[i]) {
        !          1337: #if LINUX_VERSION_CODE < 0x20100
        !          1338:                        np->rx_skbuff[i]->free = 1;
        !          1339: #endif
        !          1340:                        dev_free_skb(np->rx_skbuff[i]);
        !          1341:                }
        !          1342:                np->rx_skbuff[i] = 0;
        !          1343:        }
        !          1344:        for (i = 0; i < TX_RING_SIZE; i++) {
        !          1345:                if (np->tx_skbuff[i])
        !          1346:                        dev_free_skb(np->tx_skbuff[i]);
        !          1347:                np->tx_skbuff[i] = 0;
        !          1348:        }
        !          1349: 
        !          1350:        MOD_DEC_USE_COUNT;
        !          1351: 
        !          1352:        return 0;
        !          1353: }
        !          1354: 
        !          1355: static int netdev_pwr_event(void *dev_instance, int event)
        !          1356: {
        !          1357:        struct net_device *dev = dev_instance;
        !          1358:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1359:        long ioaddr = dev->base_addr;
        !          1360: 
        !          1361:        if (np->msg_level & NETIF_MSG_LINK)
        !          1362:                printk(KERN_DEBUG "%s: Handling power event %d.\n", dev->name, event);
        !          1363:        switch(event) {
        !          1364:        case DRV_ATTACH:
        !          1365:                MOD_INC_USE_COUNT;
        !          1366:                break;
        !          1367:        case DRV_SUSPEND:
        !          1368:                /* Disable interrupts, stop Tx and Rx. */
        !          1369:                writel(~0, ioaddr + IntrDisable);
        !          1370:                /* writel(2, ioaddr + RxCmd); */
        !          1371:                /* writew(2, ioaddr + TxCmd); */
        !          1372:                break;
        !          1373:        case DRV_RESUME:
        !          1374:                /* This is incomplete: the actions are very chip specific. */
        !          1375:                set_rx_mode(dev);
        !          1376:                break;
        !          1377:        case DRV_DETACH: {
        !          1378:                struct net_device **devp, **next;
        !          1379:                if (dev->flags & IFF_UP) {
        !          1380:                        /* Some, but not all, kernel versions close automatically. */
        !          1381:                        dev_close(dev);
        !          1382:                        dev->flags &= ~(IFF_UP|IFF_RUNNING);
        !          1383:                }
        !          1384:                unregister_netdev(dev);
        !          1385:                release_region(dev->base_addr, pci_id_tbl[np->chip_id].io_size);
        !          1386:                iounmap((char *)dev->base_addr);
        !          1387:                for (devp = &root_net_dev; *devp; devp = next) {
        !          1388:                        next = &((struct netdev_private *)(*devp)->priv)->next_module;
        !          1389:                        if (*devp == dev) {
        !          1390:                                *devp = *next;
        !          1391:                                break;
        !          1392:                        }
        !          1393:                }
        !          1394:                if (np->priv_addr)
        !          1395:                        kfree(np->priv_addr);
        !          1396:                kfree(dev);
        !          1397:                MOD_DEC_USE_COUNT;
        !          1398:                break;
        !          1399:        }
        !          1400:        }
        !          1401: 
        !          1402:        return 0;
        !          1403: }
        !          1404: 
        !          1405: 
        !          1406: #ifdef MODULE
        !          1407: int init_module(void)
        !          1408: {
        !          1409:        /* Emit version even if no cards detected. */
        !          1410:        printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
        !          1411:        return pci_drv_register(&igige_drv_id, NULL);
        !          1412: }
        !          1413: 
        !          1414: void cleanup_module(void)
        !          1415: {
        !          1416:        struct net_device *next_dev;
        !          1417: 
        !          1418:        pci_drv_unregister(&igige_drv_id);
        !          1419: 
        !          1420:        /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
        !          1421:        while (root_net_dev) {
        !          1422:                struct netdev_private *np = (void *)(root_net_dev->priv);
        !          1423:                unregister_netdev(root_net_dev);
        !          1424:                release_region(root_net_dev->base_addr,
        !          1425:                                           pci_id_tbl[np->chip_id].io_size);
        !          1426:                iounmap((char *)(root_net_dev->base_addr));
        !          1427:                next_dev = np->next_module;
        !          1428:                if (np->tx_ring == 0)
        !          1429:                        free_page((long)np->tx_ring);
        !          1430:                if (np->rx_ring == 0)
        !          1431:                        free_page((long)np->rx_ring);
        !          1432:                if (np->priv_addr)
        !          1433:                        kfree(np->priv_addr);
        !          1434:                kfree(root_net_dev);
        !          1435:                root_net_dev = next_dev;
        !          1436:        }
        !          1437: }
        !          1438: 
        !          1439: #endif  /* MODULE */
        !          1440: 
        !          1441: /*
        !          1442:  * Local variables:
        !          1443:  *  compile-command: "make KERNVER=`uname -r` intel-gige.o"
        !          1444:  *  compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c intel-gige.c"
        !          1445:  *  simple-compile-command: "gcc -DMODULE -O6 -c intel-gige.c"
        !          1446:  *  c-indent-level: 4
        !          1447:  *  c-basic-offset: 4
        !          1448:  *  tab-width: 4
        !          1449:  * End:
        !          1450:  */

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