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

1.1     ! root        1: /* starfire.c: Linux device driver for the Adaptec Starfire network adapter. */
        !             2: /*
        !             3:        Written/Copyright 1998-2003 by Donald Becker.
        !             4: 
        !             5:        This software may be used and distributed according to the terms of
        !             6:        the GNU General Public License (GPL), incorporated herein by reference.
        !             7:        Drivers based on or derived from this code fall under the GPL and must
        !             8:        retain the authorship, copyright and license notice.  This file is not
        !             9:        a complete program and may only be used when the entire operating
        !            10:        system is licensed under the GPL.
        !            11: 
        !            12:        The author may be reached as [email protected], or C/O
        !            13:        Scyld Computing Corporation
        !            14:        914 Bay Ridge Road, Suite 220
        !            15:        Annapolis MD 21403
        !            16: 
        !            17:        Support information and updates available at
        !            18:        http://www.scyld.com/network/starfire.html
        !            19: */
        !            20: 
        !            21: /* These identify the driver base version and may not be removed. */
        !            22: static const char version1[] =
        !            23: "starfire.c:v1.09 7/22/2003  Copyright by Donald Becker <[email protected]>\n";
        !            24: static const char version2[] =
        !            25: " Updates and info at http://www.scyld.com/network/starfire.html\n";
        !            26: 
        !            27: /* The user-configurable values.
        !            28:    These may be modified when a driver module is loaded.*/
        !            29: 
        !            30: /* Used for tuning interrupt latency vs. overhead. */
        !            31: static int interrupt_mitigation = 0x0;
        !            32: 
        !            33: /* Message enable level: 0..31 = no..all messages.  See NETIF_MSG docs. */
        !            34: static int debug = 2;
        !            35: 
        !            36: /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
        !            37: static int max_interrupt_work = 20;
        !            38: 
        !            39: /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
        !            40:    The Starfire has a 512 element hash table based on the Ethernet CRC.  */
        !            41: static int multicast_filter_limit = 32;
        !            42: 
        !            43: /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
        !            44:    Setting to > 1518 effectively disables this feature. */
        !            45: static int rx_copybreak = 0;
        !            46: 
        !            47: /* Used to pass the media type, etc.
        !            48:    Both 'options[]' and 'full_duplex[]' exist for driver interoperability,
        !            49:    however full_duplex[] should never be used in new configurations.
        !            50:    The media type is usually passed in 'options[]'.
        !            51:     The default is autonegotation for speed and duplex.
        !            52:        This should rarely be overridden.
        !            53:     Use option values 0x10/0x20 for 10Mbps, 0x100,0x200 for 100Mbps.
        !            54:     Use option values 0x10 and 0x100 for forcing half duplex fixed speed.
        !            55:     Use option values 0x20 and 0x200 for forcing full duplex operation.
        !            56: */
        !            57: #define MAX_UNITS 8            /* More are supported, limit only on options */
        !            58: static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
        !            59: static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
        !            60: 
        !            61: /* Automatically extracted configuration info:
        !            62: probe-func: starfire_probe
        !            63: config-in: tristate 'Adaptec DuraLAN ("starfire") series PCI Ethernet support' CONFIG_DURLAN
        !            64: 
        !            65: c-help-name: Adaptec DuraLAN ("starfire") series PCI Ethernet support
        !            66: c-help-symbol: CONFIG_DURALAN
        !            67: c-help: This driver is for the Adaptec DuraLAN series, the 6915, 62022
        !            68: c-help: and 62044 boards.
        !            69: c-help: Design information, usage details and updates are available from
        !            70: c-help: http://www.scyld.com/network/starfire.html
        !            71: */
        !            72: 
        !            73: /* Operational parameters that are set at compile time. */
        !            74: 
        !            75: /* The "native" ring sizes are either 256 or 2048.
        !            76:    However in some modes a descriptor may be marked to wrap the ring earlier.
        !            77:    The driver allocates a single page for each descriptor ring, constraining
        !            78:    the maximum size in an architecture-dependent way.
        !            79: */
        !            80: #define RX_RING_SIZE   256
        !            81: #define TX_RING_SIZE   32
        !            82: /* The completion queues are fixed at 1024 entries i.e. 4K or 8KB. */
        !            83: #define DONE_Q_SIZE    1024
        !            84: 
        !            85: /* Operational parameters that usually are not changed. */
        !            86: /* Time in jiffies before concluding the transmitter is hung. */
        !            87: #define TX_TIMEOUT  (6*HZ)
        !            88: 
        !            89: /* Allocation size of Rx buffers with normal sized Ethernet frames.
        !            90:    Do not change this value without good reason.  This is not a limit,
        !            91:    but a way to keep a consistent allocation size among drivers.
        !            92:  */
        !            93: #define PKT_BUF_SZ             1536
        !            94: 
        !            95: #ifndef __KERNEL__
        !            96: #define __KERNEL__
        !            97: #endif
        !            98: #if !defined(__OPTIMIZE__)
        !            99: #warning  You must compile this file with the correct options!
        !           100: #warning  See the last lines of the source file.
        !           101: #error You must compile this driver with "-O".
        !           102: #endif
        !           103: 
        !           104: /* Include files, designed to support most kernel versions 2.0.0 and later. */
        !           105: #include <linux/config.h>
        !           106: #if defined(CONFIG_SMP) && ! defined(__SMP__)
        !           107: #define __SMP__
        !           108: #endif
        !           109: #if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
        !           110: #define MODVERSIONS
        !           111: #endif
        !           112: 
        !           113: #include <linux/version.h>
        !           114: #if defined(MODVERSIONS)
        !           115: #include <linux/modversions.h>
        !           116: #endif
        !           117: #include <linux/module.h>
        !           118: 
        !           119: #include <linux/kernel.h>
        !           120: #include <linux/string.h>
        !           121: #include <linux/timer.h>
        !           122: #include <linux/errno.h>
        !           123: #include <linux/ioport.h>
        !           124: #if LINUX_VERSION_CODE >= 0x20400
        !           125: #include <linux/slab.h>
        !           126: #else
        !           127: #include <linux/malloc.h>
        !           128: #endif
        !           129: #include <linux/interrupt.h>
        !           130: #include <linux/pci.h>
        !           131: #include <linux/netdevice.h>
        !           132: #include <linux/etherdevice.h>
        !           133: #include <linux/skbuff.h>
        !           134: #include <asm/processor.h>             /* Processor type for cache alignment. */
        !           135: #include <asm/bitops.h>
        !           136: #include <asm/io.h>
        !           137: 
        !           138: #ifdef INLINE_PCISCAN
        !           139: #include "k_compat.h"
        !           140: #else
        !           141: #include "pci-scan.h"
        !           142: #include "kern_compat.h"
        !           143: #endif
        !           144: 
        !           145: /* Condensed operations for readability.
        !           146:    Compatibility defines are in kern_compat.h */
        !           147: 
        !           148: #define virt_to_le32desc(addr)  cpu_to_le32(virt_to_bus(addr))
        !           149: #define le32desc_to_virt(addr)  bus_to_virt(le32_to_cpu(addr))
        !           150: 
        !           151: #if (LINUX_VERSION_CODE >= 0x20100)  &&  defined(MODULE)
        !           152: char kernel_version[] = UTS_RELEASE;
        !           153: #endif
        !           154: 
        !           155: MODULE_AUTHOR("Donald Becker <[email protected]>");
        !           156: MODULE_DESCRIPTION("Adaptec Starfire Ethernet driver");
        !           157: MODULE_LICENSE("GPL");
        !           158: MODULE_PARM(debug, "i");
        !           159: MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
        !           160: MODULE_PARM(rx_copybreak, "i");
        !           161: MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
        !           162: MODULE_PARM(multicast_filter_limit, "i");
        !           163: MODULE_PARM(max_interrupt_work, "i");
        !           164: MODULE_PARM_DESC(debug, "Driver message enable level (0-31)");
        !           165: MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex");
        !           166: MODULE_PARM_DESC(max_interrupt_work,
        !           167:                                 "Driver maximum events handled per interrupt");
        !           168: MODULE_PARM_DESC(full_duplex,
        !           169:                                 "Non-zero to set forced full duplex (deprecated).");
        !           170: MODULE_PARM_DESC(rx_copybreak,
        !           171:                                 "Breakpoint in bytes for copy-only-tiny-frames");
        !           172: MODULE_PARM_DESC(multicast_filter_limit,
        !           173:                                 "Multicast addresses before switching to Rx-all-multicast");
        !           174: 
        !           175: /*
        !           176:                                Theory of Operation
        !           177: 
        !           178: I. Board Compatibility
        !           179: 
        !           180: This driver is for the Adaptec 6915 DuraLAN "Starfire" 64 bit PCI Ethernet
        !           181: adapter, and the multiport boards using the same chip.
        !           182: 
        !           183: II. Board-specific settings
        !           184: 
        !           185: III. Driver operation
        !           186: 
        !           187: IIIa. Ring buffers
        !           188: 
        !           189: The Starfire hardware uses multiple fixed-size descriptor queues/rings.  The
        !           190: ring sizes are set fixed by the hardware, but may optionally be wrapped
        !           191: earlier by the END bit in the descriptor.
        !           192: This driver uses that hardware queue size for the Rx ring, where a large
        !           193: number of entries has no ill effect beyond increases the potential backlog.
        !           194: The Tx ring is wrapped with the END bit, since a large hardware Tx queue
        !           195: disables the queue layer priority ordering and we have no mechanism to
        !           196: utilize the hardware two-level priority queue.  When modifying the
        !           197: RX/TX_RING_SIZE pay close attention to page sizes and the ring-empty warning
        !           198: levels.
        !           199: 
        !           200: IIIb/c. Transmit/Receive Structure
        !           201: 
        !           202: See the Adaptec manual for the many possible structures, and options for
        !           203: each structure.  There are far too many to document here.
        !           204: 
        !           205: For transmit this driver uses type 1 transmit descriptors, and relies on
        !           206: automatic minimum-length padding.  It does not use the completion queue
        !           207: consumer index, but instead checks for non-zero status entries.
        !           208: 
        !           209: For receive this driver uses type 0 receive descriptors.  The driver
        !           210: allocates full frame size skbuffs for the Rx ring buffers, so all frames
        !           211: should fit in a single descriptor.  The driver does not use the completion
        !           212: queue consumer index, but instead checks for non-zero status entries.
        !           213: 
        !           214: When an incoming frame is less than RX_COPYBREAK bytes long, a fresh skbuff
        !           215: is allocated and the frame is copied to the new skbuff.  When the incoming
        !           216: frame is larger, the skbuff is passed directly up the protocol stack.
        !           217: Buffers consumed this way are replaced by newly allocated skbuffs in a later
        !           218: phase of receive.
        !           219: 
        !           220: A notable aspect of operation is that unaligned buffers are not permitted by
        !           221: the Starfire hardware.  The IP header at offset 14 in an ethernet frame thus
        !           222: isn't longword aligned, which may cause problems on some machine
        !           223: e.g. Alphas.  Copied frames are put into the skbuff at an offset of "+2",
        !           224: 16-byte aligning the IP header.
        !           225: 
        !           226: IIId. Synchronization
        !           227: 
        !           228: The driver runs as two independent, single-threaded flows of control.  One
        !           229: is the send-packet routine, which enforces single-threaded use by the
        !           230: dev->tbusy flag.  The other thread is the interrupt handler, which is single
        !           231: threaded by the hardware and interrupt handling software.
        !           232: 
        !           233: The send packet thread has partial control over the Tx ring and 'dev->tbusy'
        !           234: flag.  It sets the tbusy flag whenever it's queuing a Tx packet. If the next
        !           235: queue slot is empty, it clears the tbusy flag when finished otherwise it sets
        !           236: the 'lp->tx_full' flag.
        !           237: 
        !           238: The interrupt handler has exclusive control over the Rx ring and records stats
        !           239: from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
        !           240: empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
        !           241: clears both the tx_full and tbusy flags.
        !           242: 
        !           243: IV. Notes
        !           244: 
        !           245: IVb. References
        !           246: 
        !           247: The Adaptec Starfire manuals, available only from Adaptec.
        !           248: http://www.scyld.com/expert/100mbps.html
        !           249: http://www.scyld.com/expert/NWay.html
        !           250: 
        !           251: IVc. Errata
        !           252: 
        !           253: */
        !           254: 
        !           255: 
        !           256: 
        !           257: static void *starfire_probe1(struct pci_dev *pdev, void *init_dev,
        !           258:                                                         long ioaddr, int irq, int chip_idx, int find_cnt);
        !           259: static int starfire_pwr_event(void *dev_instance, int event);
        !           260: enum chip_capability_flags {CanHaveMII=1, };
        !           261: #define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR0)
        !           262: /* And maps in 0.5MB(!) -- no I/O mapping here!  */
        !           263: #define MEM_ADDR_SZ 0x80000
        !           264: 
        !           265: #if 0 && (defined(__x86_64) || defined(__alpha__))
        !           266: /* Enable 64 bit address modes. */
        !           267: #define STARFIRE_ADDR_64BITS 1
        !           268: #endif
        !           269: 
        !           270: static struct pci_id_info pci_id_tbl[] = {
        !           271:        {"Adaptec Starfire 6915", { 0x69159004, 0xffffffff, },
        !           272:         PCI_IOTYPE, MEM_ADDR_SZ, CanHaveMII},
        !           273:        {0,},                                           /* 0 terminated list. */
        !           274: };
        !           275: 
        !           276: struct drv_id_info starfire_drv_id = {
        !           277:        "starfire", PCI_HOTSWAP, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl,
        !           278:        starfire_probe1, starfire_pwr_event };
        !           279: 
        !           280: /* Offsets to the device registers.
        !           281:    Unlike software-only systems, device drivers interact with complex hardware.
        !           282:    It's not useful to define symbolic names for every register bit in the
        !           283:    device.  The name can only partially document the semantics and make
        !           284:    the driver longer and more difficult to read.
        !           285:    In general, only the important configuration values or bits changed
        !           286:    multiple times should be defined symbolically.
        !           287: */
        !           288: enum register_offsets {
        !           289:        PCIDeviceConfig=0x50040, GenCtrl=0x50070, IntrTimerCtrl=0x50074,
        !           290:        IntrClear=0x50080, IntrStatus=0x50084, IntrEnable=0x50088,
        !           291:        MIICtrl=0x52000, StationAddr=0x50120, EEPROMCtrl=0x51000,
        !           292:        TxDescCtrl=0x50090,
        !           293:        TxRingPtr=0x50098, HiPriTxRingPtr=0x50094, /* Low and High priority. */
        !           294:        TxRingHiAddr=0x5009C,           /* 64 bit address extension. */
        !           295:        TxProducerIdx=0x500A0, TxConsumerIdx=0x500A4,
        !           296:        TxThreshold=0x500B0,
        !           297:        CompletionHiAddr=0x500B4, TxCompletionAddr=0x500B8,
        !           298:        RxCompletionAddr=0x500BC, RxCompletionQ2Addr=0x500C0,
        !           299:        CompletionQConsumerIdx=0x500C4,
        !           300:        RxDescQCtrl=0x500D4, RxDescQHiAddr=0x500DC, RxDescQAddr=0x500E0,
        !           301:        RxDescQIdx=0x500E8, RxDMAStatus=0x500F0, RxFilterMode=0x500F4,
        !           302:        TxMode=0x55000,
        !           303: };
        !           304: 
        !           305: /* Bits in the interrupt status/mask registers. */
        !           306: enum intr_status_bits {
        !           307:        IntrNormalSummary=0x8000,       IntrAbnormalSummary=0x02000000,
        !           308:        IntrRxDone=0x0300, IntrRxEmpty=0x10040, IntrRxPCIErr=0x80000,
        !           309:        IntrTxDone=0x4000, IntrTxEmpty=0x1000, IntrTxPCIErr=0x80000,
        !           310:        StatsMax=0x08000000, LinkChange=0xf0000000,
        !           311:        IntrTxDataLow=0x00040000,
        !           312:        IntrPCIPin=0x01,
        !           313: };
        !           314: 
        !           315: /* Bits in the RxFilterMode register. */
        !           316: enum rx_mode_bits {
        !           317:        AcceptBroadcast=0x04, AcceptAllMulticast=0x02, AcceptAll=0x01,
        !           318:        AcceptMulticast=0x10, AcceptMyPhys=0xE040,
        !           319: };
        !           320: 
        !           321: /* Misc. bits.  Symbolic names so that may be searched for. */
        !           322: enum misc_bits {
        !           323:        ChipResetCmd=1,                         /* PCIDeviceConfig */
        !           324:        PCIIntEnb=0x00800000,           /* PCIDeviceConfig */
        !           325:        TxEnable=0x0A, RxEnable=0x05, SoftIntr=0x100, /* GenCtrl */
        !           326: };
        !           327: 
        !           328: /* The Rx and Tx buffer descriptors. */
        !           329: struct starfire_rx_desc {
        !           330:        u32 rxaddr;                                     /* Optionally 64 bits. */
        !           331: #if defined(STARFIRE_ADDR_64BITS)
        !           332:        u32 rxaddr_hi;                                  /* Optionally 64 bits. */
        !           333: #endif
        !           334: };
        !           335: enum rx_desc_bits {
        !           336:        RxDescValid=1, RxDescEndRing=2,
        !           337: };
        !           338: 
        !           339: /* Completion queue entry.
        !           340:    You must update the page allocation, init_ring and the shift count in rx()
        !           341:    if using a larger format. */
        !           342: struct rx_done_desc {
        !           343:        u32 status;                                     /* Low 16 bits is length. */
        !           344: #ifdef full_rx_status
        !           345:        u32 status2;
        !           346:        u16 vlanid;
        !           347:        u16 csum;                       /* partial checksum */
        !           348:        u32 timestamp;
        !           349: #endif
        !           350: };
        !           351: enum rx_done_bits {
        !           352:        RxOK=0x20000000, RxFIFOErr=0x10000000, RxBufQ2=0x08000000,
        !           353: };
        !           354: 
        !           355: /* Type 1 Tx descriptor. */
        !           356: struct starfire_tx_desc {
        !           357:        u32 status;                                     /* Upper bits are status, lower 16 length. */
        !           358:        u32 addr;
        !           359: };
        !           360: enum tx_desc_bits {
        !           361:        TxDescID=0xB1010000,            /* Also marks single fragment, add CRC.  */
        !           362:        TxDescIntr=0x08000000, TxRingWrap=0x04000000,
        !           363: };
        !           364: struct tx_done_report {
        !           365:        u32 status;                                     /* timestamp, index. */
        !           366: #if 0
        !           367:        u32 intrstatus;                         /* interrupt status */
        !           368: #endif
        !           369: };
        !           370: 
        !           371: #define PRIV_ALIGN     15      /* Required alignment mask */
        !           372: struct netdev_private {
        !           373:        /* Descriptor rings first for alignment. */
        !           374:        struct starfire_rx_desc *rx_ring;
        !           375:        struct starfire_tx_desc *tx_ring;
        !           376:        struct net_device *next_module;         /* Link for devices of this type. */
        !           377:        void *priv_addr;                                        /* Unaligned address for kfree */
        !           378:        const char *product_name;
        !           379:        /* The addresses of rx/tx-in-place skbuffs. */
        !           380:        struct sk_buff* rx_skbuff[RX_RING_SIZE];
        !           381:        struct sk_buff* tx_skbuff[TX_RING_SIZE];
        !           382:        u8 pad0[100];                                           /* Impact padding */
        !           383:        /* Pointers to completion queues (full pages).  Cache line pad.. */
        !           384:        struct rx_done_desc *rx_done_q  __attribute__((aligned (L1_CACHE_BYTES)));
        !           385:        unsigned int rx_done;
        !           386:        struct tx_done_report *tx_done_q __attribute__((aligned (L1_CACHE_BYTES)));
        !           387:        unsigned int tx_done;
        !           388: 
        !           389:        struct net_device_stats stats;
        !           390:        struct timer_list timer;        /* Media monitoring timer. */
        !           391:        int msg_level;
        !           392:        int chip_id, drv_flags;
        !           393:        struct pci_dev *pci_dev;
        !           394:        /* Frequently used values: keep some adjacent for cache effect. */
        !           395:        int max_interrupt_work;
        !           396:        int intr_enable;
        !           397:        unsigned int restore_intr_enable:1;     /* Set if temporarily masked.  */
        !           398:        unsigned int polling:1;                         /* Erk, IRQ err. */
        !           399: 
        !           400:        unsigned int cur_rx, dirty_rx;          /* Producer/consumer ring indices */
        !           401:        unsigned int rx_buf_sz;                         /* Based on MTU+slack. */
        !           402:        int rx_copybreak;
        !           403: 
        !           404:        unsigned int cur_tx, dirty_tx;
        !           405:        unsigned int tx_full:1;                         /* The Tx queue is full. */
        !           406:        /* These values keep track of the transceiver/media in use. */
        !           407:        unsigned int full_duplex:1,                     /* Full-duplex operation requested. */
        !           408:                medialock:1,                                    /* Xcvr set to fixed speed/duplex. */
        !           409:                rx_flowctrl:1,
        !           410:                tx_flowctrl:1;                                  /* Use 802.3x flow control. */
        !           411:        unsigned int default_port;                      /* Last dev->if_port value. */
        !           412:        u32 tx_mode;
        !           413:        u8 tx_threshold;
        !           414:        u32 cur_rx_mode;
        !           415:        u16 mc_filter[32];
        !           416:        int multicast_filter_limit;
        !           417: 
        !           418:        /* MII transceiver section. */
        !           419:        int mii_cnt;                                            /* MII device addresses. */
        !           420:        u16 advertising;                                        /* NWay media advertisement */
        !           421:        unsigned char phys[2];                          /* MII device addresses. */
        !           422: };
        !           423: 
        !           424: static int  mdio_read(struct net_device *dev, int phy_id, int location);
        !           425: static void mdio_write(struct net_device *dev, int phy_id, int location,
        !           426:                                           int value);
        !           427: static int  netdev_open(struct net_device *dev);
        !           428: static int  change_mtu(struct net_device *dev, int new_mtu);
        !           429: static void check_duplex(struct net_device *dev);
        !           430: static void netdev_timer(unsigned long data);
        !           431: static void tx_timeout(struct net_device *dev);
        !           432: static void init_ring(struct net_device *dev);
        !           433: static int  start_tx(struct sk_buff *skb, struct net_device *dev);
        !           434: static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
        !           435: static void netdev_error(struct net_device *dev, int intr_status);
        !           436: static int  netdev_rx(struct net_device *dev);
        !           437: static void netdev_error(struct net_device *dev, int intr_status);
        !           438: static void set_rx_mode(struct net_device *dev);
        !           439: static struct net_device_stats *get_stats(struct net_device *dev);
        !           440: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
        !           441: static int  netdev_close(struct net_device *dev);
        !           442: 
        !           443: 
        !           444: 
        !           445: /* A list of our installed devices, for removing the driver module. */
        !           446: static struct net_device *root_net_dev = NULL;
        !           447: 
        !           448: #ifndef MODULE
        !           449: int starfire_probe(struct net_device *dev)
        !           450: {
        !           451:        if (pci_drv_register(&starfire_drv_id, dev) < 0)
        !           452:                return -ENODEV;
        !           453:        printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
        !           454:        return 0;
        !           455: }
        !           456: #endif
        !           457: 
        !           458: static void *starfire_probe1(struct pci_dev *pdev, void *init_dev,
        !           459:                                                         long ioaddr, int irq, int chip_idx, int card_idx)
        !           460: {
        !           461:        struct net_device *dev;
        !           462:        struct netdev_private *np;
        !           463:        void *priv_mem;
        !           464:        int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0;
        !           465: 
        !           466:        dev = init_etherdev(init_dev, 0);
        !           467:        if (!dev)
        !           468:                return NULL;
        !           469: 
        !           470:        printk(KERN_INFO "%s: %s at 0x%lx, ",
        !           471:                   dev->name, pci_id_tbl[chip_idx].name, ioaddr);
        !           472: 
        !           473:        /* Serial EEPROM reads are hidden by the hardware. */
        !           474:        for (i = 0; i < 6; i++)
        !           475:                dev->dev_addr[i] = readb(ioaddr + EEPROMCtrl + 20-i);
        !           476:        for (i = 0; i < 5; i++)
        !           477:                printk("%2.2x:", dev->dev_addr[i]);
        !           478:        printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
        !           479: 
        !           480:        /* Make certain elements e.g. descriptor lists are aligned. */
        !           481:        priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL);
        !           482:        /* Check for the very unlikely case of no memory. */
        !           483:        if (priv_mem == NULL)
        !           484:                return NULL;
        !           485: 
        !           486:        /* Reset the chip to erase previous misconfiguration. */
        !           487:        writel(ChipResetCmd, ioaddr + PCIDeviceConfig);
        !           488: 
        !           489:        dev->base_addr = ioaddr;
        !           490:        dev->irq = irq;
        !           491: 
        !           492:        dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN);
        !           493:        memset(np, 0, sizeof(*np));
        !           494:        np->priv_addr = priv_mem;
        !           495: 
        !           496:        np->next_module = root_net_dev;
        !           497:        root_net_dev = dev;
        !           498: 
        !           499:        np->pci_dev = pdev;
        !           500:        np->chip_id = chip_idx;
        !           501:        np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
        !           502:        np->msg_level = (1 << debug) - 1;
        !           503:        np->rx_copybreak = rx_copybreak;
        !           504:        np->max_interrupt_work = max_interrupt_work;
        !           505:        np->multicast_filter_limit = multicast_filter_limit;
        !           506: 
        !           507:        if (dev->mem_start)
        !           508:                option = dev->mem_start;
        !           509: 
        !           510:        if (card_idx < MAX_UNITS  &&  full_duplex[card_idx] > 0)
        !           511:                np->full_duplex = 1;
        !           512: 
        !           513:        if (np->full_duplex) {
        !           514:                if (np->msg_level & NETIF_MSG_PROBE)
        !           515:                        printk(KERN_INFO "%s: Set to forced full duplex, autonegotiation"
        !           516:                                   " disabled.\n", dev->name);
        !           517:                np->medialock = 1;
        !           518:        }
        !           519: 
        !           520:        /* The chip-specific entries in the device structure. */
        !           521:        dev->open = &netdev_open;
        !           522:        dev->hard_start_xmit = &start_tx;
        !           523:        dev->stop = &netdev_close;
        !           524:        dev->get_stats = &get_stats;
        !           525:        dev->set_multicast_list = &set_rx_mode;
        !           526:        dev->do_ioctl = &mii_ioctl;
        !           527:        dev->change_mtu = &change_mtu;
        !           528: 
        !           529:        if (np->drv_flags & CanHaveMII) {
        !           530:                int phy, phy_idx = 0;
        !           531:                for (phy = 0; phy < 32 && phy_idx < 4; phy++) {
        !           532:                        int mii_status = mdio_read(dev, phy, 1);
        !           533:                        if (mii_status != 0xffff  &&  mii_status != 0x0000) {
        !           534:                                np->phys[phy_idx++] = phy;
        !           535:                                np->advertising = mdio_read(dev, phy, 4);
        !           536:                                if (np->msg_level & NETIF_MSG_PROBE)
        !           537:                                        printk(KERN_INFO "%s: MII PHY found at address %d, status "
        !           538:                                                   "0x%4.4x advertising %4.4x.\n",
        !           539:                                                   dev->name, phy, mii_status, np->advertising);
        !           540:                        }
        !           541:                }
        !           542:                np->mii_cnt = phy_idx;
        !           543:        }
        !           544: 
        !           545:        /* Force the media type after detecting the transceiver. */
        !           546:        if (option > 0) {
        !           547:                if (option & 0x220)
        !           548:                        np->full_duplex = 1;
        !           549:                np->default_port = option & 0x3ff;
        !           550:                if (np->default_port & 0x330) {
        !           551:                        np->medialock = 1;
        !           552:                        if (np->msg_level & NETIF_MSG_PROBE)
        !           553:                                printk(KERN_INFO "  Forcing %dMbs %s-duplex operation.\n",
        !           554:                                           (option & 0x300 ? 100 : 10),
        !           555:                                           (np->full_duplex ? "full" : "half"));
        !           556:                        mdio_write(dev, np->phys[0], 0,
        !           557:                                           ((option & 0x300) ? 0x2000 : 0) |    /* 100mbps? */
        !           558:                                           (np->full_duplex ? 0x0100 : 0)); /* Full duplex? */
        !           559:                }
        !           560:        }
        !           561: 
        !           562:        return dev;
        !           563: }
        !           564: 
        !           565: 
        !           566: /* Read the MII Management Data I/O (MDIO) interfaces. */
        !           567: 
        !           568: static int mdio_read(struct net_device *dev, int phy_id, int location)
        !           569: {
        !           570:        long mdio_addr = dev->base_addr + MIICtrl + (phy_id<<7) + (location<<2);
        !           571:        int result, boguscnt=1000;
        !           572:        /* ??? Should we add a busy-wait here? */
        !           573:        do
        !           574:                result = readl(mdio_addr);
        !           575:        while ((result & 0xC0000000) != 0x80000000 && --boguscnt >= 0);
        !           576:        return result & 0xffff;
        !           577: }
        !           578: 
        !           579: static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
        !           580: {
        !           581:        long mdio_addr = dev->base_addr + MIICtrl + (phy_id<<7) + (location<<2);
        !           582:        writel(value, mdio_addr);
        !           583:        /* The busy-wait will occur before a read. */
        !           584:        return;
        !           585: }
        !           586: 
        !           587: 
        !           588: static int netdev_open(struct net_device *dev)
        !           589: {
        !           590:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           591:        long ioaddr = dev->base_addr;
        !           592:        int i;
        !           593: 
        !           594:        MOD_INC_USE_COUNT;
        !           595: 
        !           596:        if (request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev)) {
        !           597:                MOD_DEC_USE_COUNT;
        !           598:                return -EAGAIN;
        !           599:        }
        !           600: 
        !           601:        /* We have no reports that indicate we need to reset the chip.
        !           602:           But to be on the safe side... */
        !           603:        /* Disable the Rx and Tx, and reset the chip. */
        !           604:        writel(0, ioaddr + GenCtrl);
        !           605:        writel(ChipResetCmd, ioaddr + PCIDeviceConfig);
        !           606:        if (np->msg_level & NETIF_MSG_IFUP)
        !           607:                printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
        !           608:                           dev->name, dev->irq);
        !           609:        /* Allocate the various queues, failing gracefully. */
        !           610:        if (np->tx_done_q == 0)
        !           611:                np->tx_done_q = (struct tx_done_report *)get_free_page(GFP_KERNEL);
        !           612:        if (np->rx_done_q == 0)
        !           613:                np->rx_done_q = (struct rx_done_desc *)get_free_page(GFP_KERNEL);
        !           614:        if (np->tx_ring == 0)
        !           615:                np->tx_ring = (struct starfire_tx_desc *)get_free_page(GFP_KERNEL);
        !           616:        if (np->rx_ring == 0)
        !           617:                np->rx_ring = (struct starfire_rx_desc *)get_free_page(GFP_KERNEL);
        !           618:        if (np->tx_done_q == 0  ||  np->rx_done_q == 0
        !           619:                || np->rx_ring == 0 ||  np->tx_ring == 0) {
        !           620:                /* Retain the pages to increase our chances next time. */
        !           621:                MOD_DEC_USE_COUNT;
        !           622:                return -ENOMEM;
        !           623:        }
        !           624: 
        !           625:        init_ring(dev);
        !           626:        /* Set the size of the Rx buffers. */
        !           627:        writel((np->rx_buf_sz<<16) | 0xA000, ioaddr + RxDescQCtrl);
        !           628: 
        !           629:        /* Set Tx descriptor to type 1 and padding to 0 bytes. */
        !           630:        writel(0x02000401, ioaddr + TxDescCtrl);
        !           631: 
        !           632: #if defined(STARFIRE_ADDR_64BITS)
        !           633:        writel(virt_to_bus(np->rx_ring) >> 32, ioaddr + RxDescQHiAddr);
        !           634:        writel(virt_to_bus(np->tx_ring) >> 32, ioaddr + TxRingHiAddr);
        !           635: #else
        !           636:        writel(0, ioaddr + RxDescQHiAddr);
        !           637:        writel(0, ioaddr + TxRingHiAddr);
        !           638:        writel(0, ioaddr + CompletionHiAddr);
        !           639: #endif
        !           640:        writel(virt_to_bus(np->rx_ring), ioaddr + RxDescQAddr);
        !           641:        writel(virt_to_bus(np->tx_ring), ioaddr + TxRingPtr);
        !           642: 
        !           643:        writel(virt_to_bus(np->tx_done_q), ioaddr + TxCompletionAddr);
        !           644:        writel(virt_to_bus(np->rx_done_q), ioaddr + RxCompletionAddr);
        !           645: 
        !           646:        if (np->msg_level & NETIF_MSG_IFUP)
        !           647:                printk(KERN_DEBUG "%s:  Filling in the station address.\n", dev->name);
        !           648: 
        !           649:        /* Fill both the unused Tx SA register and the Rx perfect filter. */
        !           650:        for (i = 0; i < 6; i++)
        !           651:                writeb(dev->dev_addr[i], ioaddr + StationAddr + 5-i);
        !           652:        for (i = 0; i < 16; i++) {
        !           653:                u16 *eaddrs = (u16 *)dev->dev_addr;
        !           654:                long setup_frm = ioaddr + 0x56000 + i*16;
        !           655:                writew(cpu_to_be16(eaddrs[2]), setup_frm); setup_frm += 4;
        !           656:                writew(cpu_to_be16(eaddrs[1]), setup_frm); setup_frm += 4;
        !           657:                writew(cpu_to_be16(eaddrs[0]), setup_frm); setup_frm += 8;
        !           658:        }
        !           659: 
        !           660:        /* Initialize other registers. */
        !           661:        /* Configure the PCI bus bursts and FIFO thresholds. */
        !           662:        np->tx_mode = 0;                        /* Initialized when TxMode set. */
        !           663:        np->tx_threshold = 4;
        !           664:        writel(np->tx_threshold, ioaddr + TxThreshold);
        !           665:        writel(interrupt_mitigation, ioaddr + IntrTimerCtrl);
        !           666: 
        !           667:        if (dev->if_port == 0)
        !           668:                dev->if_port = np->default_port;
        !           669: 
        !           670:        if (np->msg_level & NETIF_MSG_IFUP)
        !           671:                printk(KERN_DEBUG "%s:  Setting the Rx and Tx modes.\n", dev->name);
        !           672:        set_rx_mode(dev);
        !           673: 
        !           674:        np->advertising = mdio_read(dev, np->phys[0], 4);
        !           675:        check_duplex(dev);
        !           676:        netif_start_tx_queue(dev);
        !           677: 
        !           678:        /* Set the interrupt mask and enable PCI interrupts. */
        !           679:        np->intr_enable = IntrRxDone | IntrRxEmpty | IntrRxPCIErr |
        !           680:                IntrTxDone | IntrTxEmpty | IntrTxPCIErr |
        !           681:                StatsMax | LinkChange | IntrNormalSummary | IntrAbnormalSummary
        !           682:                | 0x0010;
        !           683:        writel(np->intr_enable, ioaddr + IntrEnable);
        !           684:        writel(PCIIntEnb | readl(ioaddr + PCIDeviceConfig),
        !           685:                   ioaddr + PCIDeviceConfig);
        !           686: 
        !           687:        /* Enable the Rx and Tx units. */
        !           688:        writel(TxEnable|RxEnable, ioaddr + GenCtrl);
        !           689: 
        !           690:        if (np->msg_level & NETIF_MSG_IFUP)
        !           691:                printk(KERN_DEBUG "%s: Done netdev_open().\n",
        !           692:                           dev->name);
        !           693: 
        !           694:        /* Set the timer to check for link beat. */
        !           695:        init_timer(&np->timer);
        !           696:        np->timer.expires = jiffies + 3*HZ;
        !           697:        np->timer.data = (unsigned long)dev;
        !           698:        np->timer.function = &netdev_timer;                             /* timer handler */
        !           699:        add_timer(&np->timer);
        !           700: 
        !           701:        return 0;
        !           702: }
        !           703: 
        !           704: /* The starfire can handle frame sizes up to 64KB, but we arbitrarily
        !           705:  * limit the size.
        !           706:  */
        !           707: static int change_mtu(struct net_device *dev, int new_mtu)
        !           708: {
        !           709:        if ((new_mtu < 68) || (new_mtu > 17268))
        !           710:                return -EINVAL;
        !           711:        if (netif_running(dev))
        !           712:                return -EBUSY;
        !           713:        dev->mtu = new_mtu;
        !           714:        return 0;
        !           715: }
        !           716: 
        !           717: static void check_duplex(struct net_device *dev)
        !           718: {
        !           719:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           720:        long ioaddr = dev->base_addr;
        !           721:        int new_tx_mode;
        !           722: 
        !           723:        new_tx_mode = 0x0C04 | (np->tx_flowctrl ? 0x0800:0)
        !           724:                | (np->rx_flowctrl ? 0x0400:0);
        !           725:        if (np->medialock) {
        !           726:                if (np->full_duplex)
        !           727:                        new_tx_mode |= 2;
        !           728:        } else {
        !           729:                int mii_reg5 = mdio_read(dev, np->phys[0], 5);
        !           730:                int negotiated = mii_reg5 & np->advertising;
        !           731:                int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
        !           732:                if (duplex)
        !           733:                        new_tx_mode |= 2;
        !           734:                if (np->full_duplex != duplex) {
        !           735:                        np->full_duplex = duplex;
        !           736:                        if (np->msg_level & NETIF_MSG_LINK)
        !           737:                                printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d"
        !           738:                                           " negotiated capability %4.4x.\n", dev->name,
        !           739:                                           duplex ? "full" : "half", np->phys[0], negotiated);
        !           740:                }
        !           741:        }
        !           742:        if (new_tx_mode != np->tx_mode) {
        !           743:                np->tx_mode = new_tx_mode;
        !           744:                writel(np->tx_mode | 0x8000, ioaddr + TxMode);
        !           745:                writel(np->tx_mode, ioaddr + TxMode);
        !           746:        }
        !           747: }
        !           748: 
        !           749: /* Check for duplex changes, but mostly check for failures. */
        !           750: static void netdev_timer(unsigned long data)
        !           751: {
        !           752:        struct net_device *dev = (struct net_device *)data;
        !           753:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           754:        long ioaddr = dev->base_addr;
        !           755:        int status = readl(ioaddr + IntrStatus);
        !           756:        static long last_msg = 0;
        !           757: 
        !           758:        /* Normally we check only every few seconds. */
        !           759:        np->timer.expires = jiffies + 60*HZ;
        !           760: 
        !           761:        if (np->msg_level & NETIF_MSG_TIMER) {
        !           762:                printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x.\n",
        !           763:                           dev->name, status);
        !           764:        }
        !           765: 
        !           766:        /* Check for a missing chip or failed interrupt line.
        !           767:         * The latter may be falsely triggered, so we check twice. */
        !           768:        if (status == 0xffffffff) {
        !           769:                if (jiffies - last_msg > 10*HZ) {
        !           770:                        last_msg = jiffies;
        !           771:                        printk(KERN_ERR "%s: The Starfire chip is missing!\n",
        !           772:                                   dev->name);
        !           773:                }
        !           774:        } else if (np->polling) {
        !           775:                if (status & IntrPCIPin) {
        !           776:                        intr_handler(dev->irq, dev, 0);
        !           777:                        if (jiffies - last_msg > 10*HZ) {
        !           778:                                printk(KERN_ERR "%s: IRQ %d is still blocked!\n",
        !           779:                                           dev->name, dev->irq);
        !           780:                                last_msg = jiffies;
        !           781:                        }
        !           782:                } else if (jiffies - last_msg > 10*HZ)
        !           783:                        np->polling = 0;
        !           784:                np->timer.expires = jiffies + 2;
        !           785:        } else if (status & IntrPCIPin) {
        !           786:                int new_status = readl(ioaddr + IntrStatus);
        !           787:                /* Bogus hardware IRQ mapping: Fake an interrupt handler call. */
        !           788:                if (new_status & IntrPCIPin) {
        !           789:                        printk(KERN_ERR "%s: IRQ %d is not raising an interrupt! "
        !           790:                                   "Status %8.8x/%8.8x.  \n",
        !           791:                                   dev->name, dev->irq, status, new_status);
        !           792:                        intr_handler(dev->irq, dev, 0);
        !           793:                        np->timer.expires = jiffies + 2;
        !           794:                        np->polling = 1;
        !           795:                }
        !           796:        } else if (netif_queue_paused(dev)  &&
        !           797:                           np->cur_tx - np->dirty_tx > 1  &&
        !           798:                           (jiffies - dev->trans_start) > TX_TIMEOUT) {
        !           799:                /* This will not catch tbusy incorrectly set when the queue is empty,
        !           800:                 * but that state should never occur. */
        !           801:                tx_timeout(dev);
        !           802:        }
        !           803: 
        !           804:        check_duplex(dev);
        !           805: 
        !           806:        add_timer(&np->timer);
        !           807: }
        !           808: 
        !           809: static void tx_timeout(struct net_device *dev)
        !           810: {
        !           811:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           812:        long ioaddr = dev->base_addr;
        !           813: 
        !           814:        printk(KERN_WARNING "%s: Transmit timed out, status %8.8x,"
        !           815:                   " resetting...\n", dev->name, (int)readl(ioaddr + IntrStatus));
        !           816: 
        !           817: #if defined(__i386__)
        !           818:        if (np->msg_level & NETIF_MSG_TX_ERR) {
        !           819:                int i;
        !           820:                printk("\n" KERN_DEBUG "  Tx ring %p: ", np->tx_ring);
        !           821:                for (i = 0; i < TX_RING_SIZE; i++)
        !           822:                        printk(" %4.4x", np->tx_ring[i].status);
        !           823:                printk("\n" KERN_DEBUG "  Rx ring %p: ", np->rx_ring);
        !           824:                for (i = 0; i < RX_RING_SIZE; i++)
        !           825:                        printk(" %8.8x", (unsigned int)np->rx_ring[i].rxaddr);
        !           826:                printk("\n");
        !           827:        }
        !           828: #endif
        !           829: 
        !           830:        /* If a specific problem is reported, reinitialize the hardware here. */
        !           831:        dev->if_port = 0;
        !           832:        /* Stop and restart the chip's Tx processes . */
        !           833:        writel(0, ioaddr + GenCtrl);
        !           834:        /* Enable the Rx and Tx units. */
        !           835:        writel(TxEnable|RxEnable, ioaddr + GenCtrl);
        !           836: 
        !           837:        dev->trans_start = jiffies;
        !           838:        np->stats.tx_errors++;
        !           839:        return;
        !           840: }
        !           841: 
        !           842: 
        !           843: /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
        !           844: static void init_ring(struct net_device *dev)
        !           845: {
        !           846:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           847:        int i;
        !           848: 
        !           849:        np->tx_full = 0;
        !           850:        np->cur_rx = np->cur_tx = 0;
        !           851:        np->dirty_rx = np->rx_done = np->dirty_tx = np->tx_done = 0;
        !           852: 
        !           853:        np->rx_buf_sz = (dev->mtu <= 1522 ? PKT_BUF_SZ :
        !           854:                                         (dev->mtu + 14 + 3) & ~3);     /* Round to word. */
        !           855: 
        !           856:        /* Fill in the Rx buffers.  Handle allocation failure gracefully. */
        !           857:        for (i = 0; i < RX_RING_SIZE; i++) {
        !           858:                struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
        !           859:                np->rx_skbuff[i] = skb;
        !           860:                if (skb == NULL)
        !           861:                        break;
        !           862:                skb->dev = dev;                 /* Mark as being used by this device. */
        !           863:                /* Grrr, we cannot offset to correctly align the IP header. */
        !           864:                np->rx_ring[i].rxaddr =
        !           865:                        virt_to_le32desc(skb->tail) | cpu_to_le32(RxDescValid);
        !           866:        }
        !           867:        writew(i - 1, dev->base_addr + RxDescQIdx);
        !           868:        np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
        !           869: 
        !           870:        /* Clear the remainder of the Rx buffer ring. */
        !           871:        for (  ; i < RX_RING_SIZE; i++) {
        !           872:                np->rx_ring[i].rxaddr = 0;
        !           873:                np->rx_skbuff[i] = 0;
        !           874:        }
        !           875:        /* Mark the last entry as wrapping the ring. */
        !           876:        np->rx_ring[i-1].rxaddr |= cpu_to_le32(RxDescEndRing);
        !           877: 
        !           878:        /* Clear the completion rings. */
        !           879:        for (i = 0; i < DONE_Q_SIZE; i++) {
        !           880:                np->rx_done_q[i].status = 0;
        !           881:                np->tx_done_q[i].status = 0;
        !           882:        }
        !           883: 
        !           884:        for (i = 0; i < TX_RING_SIZE; i++) {
        !           885:                np->tx_skbuff[i] = 0;
        !           886:                np->tx_ring[i].status = 0;
        !           887:        }
        !           888:        return;
        !           889: }
        !           890: 
        !           891: static int start_tx(struct sk_buff *skb, struct net_device *dev)
        !           892: {
        !           893:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !           894:        unsigned entry;
        !           895: 
        !           896:        /* Block a timer-based transmit from overlapping.  This happens when
        !           897:           packets are presumed lost, and we use this check the Tx status. */
        !           898:        if (netif_pause_tx_queue(dev) != 0) {
        !           899:                /* This watchdog code is redundant with the media monitor timer. */
        !           900:                if (jiffies - dev->trans_start > TX_TIMEOUT)
        !           901:                        tx_timeout(dev);
        !           902:                return 1;
        !           903:        }
        !           904: 
        !           905:        /* Caution: the write order is important here, set the field
        !           906:           with the "ownership" bits last. */
        !           907: 
        !           908:        /* Calculate the next Tx descriptor entry. */
        !           909:        entry = np->cur_tx % TX_RING_SIZE;
        !           910: 
        !           911:        np->tx_skbuff[entry] = skb;
        !           912: 
        !           913:        np->tx_ring[entry].addr = virt_to_le32desc(skb->data);
        !           914:        /* Add  "| TxDescIntr" to generate Tx-done interrupts. */
        !           915:        np->tx_ring[entry].status = cpu_to_le32(skb->len | TxDescID);
        !           916: #if 1
        !           917:        if (entry >= TX_RING_SIZE-1) {           /* Wrap ring */
        !           918:                np->tx_ring[entry].status |= cpu_to_le32(TxRingWrap | TxDescIntr);
        !           919:                entry = -1;
        !           920:        }
        !           921: #endif
        !           922: 
        !           923:        /* On some architectures better performance results by explicitly
        !           924:           flushing cache lines: pci_flush_virt(skb->data, skb->len); */
        !           925: 
        !           926:        np->cur_tx++;
        !           927:        /* Update the producer index. */
        !           928:        writel(++entry, dev->base_addr + TxProducerIdx);
        !           929: 
        !           930:        /* cf. using TX_QUEUE_LEN instead of TX_RING_SIZE here. */
        !           931:        if (np->cur_tx - np->dirty_tx >= TX_RING_SIZE - 1) {
        !           932:                np->tx_full = 1;
        !           933:                /* Check for the rare case of a just-cleared queue. */
        !           934:                if (np->cur_tx - (volatile unsigned int)np->dirty_tx
        !           935:                        < TX_RING_SIZE - 2) {
        !           936:                        np->tx_full = 0;
        !           937:                        netif_unpause_tx_queue(dev);
        !           938:                } else
        !           939:                        netif_stop_tx_queue(dev);
        !           940:        } else
        !           941:                netif_unpause_tx_queue(dev);            /* Typical path */
        !           942: 
        !           943:        dev->trans_start = jiffies;
        !           944: 
        !           945:        if (np->msg_level & NETIF_MSG_TX_QUEUED) {
        !           946:                printk(KERN_DEBUG "%s: Tx frame #%d slot %d  %8.8x %8.8x.\n",
        !           947:                           dev->name, np->cur_tx, entry,
        !           948:                           np->tx_ring[entry].status, np->tx_ring[entry].addr);
        !           949:        }
        !           950:        return 0;
        !           951: }
        !           952: 
        !           953: /* The interrupt handler does all of the Rx thread work and cleans up
        !           954:    after the Tx thread. */
        !           955: static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
        !           956: {
        !           957:        struct net_device *dev = (struct net_device *)dev_instance;
        !           958:        struct netdev_private *np;
        !           959:        long ioaddr;
        !           960:        int boguscnt;
        !           961: 
        !           962: #ifndef final_version                  /* Can never occur. */
        !           963:        if (dev == NULL) {
        !           964:                printk (KERN_ERR "Netdev interrupt handler(): IRQ %d for unknown "
        !           965:                                "device.\n", irq);
        !           966:                return;
        !           967:        }
        !           968: #endif
        !           969: 
        !           970:        ioaddr = dev->base_addr;
        !           971:        np = (struct netdev_private *)dev->priv;
        !           972:        boguscnt = np->max_interrupt_work;
        !           973: 
        !           974:        do {
        !           975:                u32 intr_status = readl(ioaddr + IntrClear);
        !           976: 
        !           977:                if (np->msg_level & NETIF_MSG_INTR)
        !           978:                        printk(KERN_DEBUG "%s: Interrupt status %4.4x.\n",
        !           979:                                   dev->name, intr_status);
        !           980: 
        !           981:                if (intr_status == 0 || intr_status == 0xffffffff)
        !           982:                        break;
        !           983: 
        !           984:                if (intr_status & IntrRxDone)
        !           985:                        netdev_rx(dev);
        !           986: 
        !           987:                /* Scavenge the skbuff list based on the Tx-done queue.
        !           988:                   There are redundant checks here that may be cleaned up
        !           989:                   after the driver has proven to be reliable. */
        !           990:                {
        !           991:                        int consumer = readl(ioaddr + TxConsumerIdx);
        !           992:                        int tx_status;
        !           993:                        if (np->msg_level & NETIF_MSG_INTR)
        !           994:                                printk(KERN_DEBUG "%s: Tx Consumer index is %d.\n",
        !           995:                                           dev->name, consumer);
        !           996: #if 0
        !           997:                        if (np->tx_done >= 250  || np->tx_done == 0)
        !           998:                                printk(KERN_DEBUG "%s: Tx completion entry %d is %8.8x, "
        !           999:                                           "%d is %8.8x.\n", dev->name,
        !          1000:                                           np->tx_done, np->tx_done_q[np->tx_done].status,
        !          1001:                                           (np->tx_done+1) & (DONE_Q_SIZE-1),
        !          1002:                                           np->tx_done_q[(np->tx_done+1)&(DONE_Q_SIZE-1)].status);
        !          1003: #endif
        !          1004:                        while ((tx_status = cpu_to_le32(np->tx_done_q[np->tx_done].status))
        !          1005:                                   != 0) {
        !          1006:                                if (np->msg_level & NETIF_MSG_TX_DONE)
        !          1007:                                        printk(KERN_DEBUG "%s: Tx completion entry %d is %8.8x.\n",
        !          1008:                                                   dev->name, np->tx_done, tx_status);
        !          1009:                                if ((tx_status & 0xe0000000) == 0xa0000000) {
        !          1010:                                        np->stats.tx_packets++;
        !          1011:                                } else if ((tx_status & 0xe0000000) == 0x80000000) {
        !          1012:                                        u16 entry = tx_status;          /* Implicit truncate */
        !          1013:                                        entry >>= 3;
        !          1014:                                        /* Scavenge the descriptor. */
        !          1015:                                        if (np->tx_skbuff[entry]) {
        !          1016:                                                dev_free_skb_irq(np->tx_skbuff[entry]);
        !          1017:                                        } else
        !          1018:                                                printk(KERN_WARNING "%s: Null skbuff at entry %d!!!\n",
        !          1019:                                                           dev->name, entry);
        !          1020:                                        np->tx_skbuff[entry] = 0;
        !          1021:                                        np->dirty_tx++;
        !          1022:                                }
        !          1023:                                np->tx_done_q[np->tx_done].status = 0;
        !          1024:                                np->tx_done = (np->tx_done+1) & (DONE_Q_SIZE-1);
        !          1025:                        }
        !          1026:                        writew(np->tx_done, ioaddr + CompletionQConsumerIdx + 2);
        !          1027:                }
        !          1028:                if (np->tx_full && np->cur_tx - np->dirty_tx < TX_RING_SIZE - 4) {
        !          1029:                        /* The ring is no longer full, allow new TX entries. */
        !          1030:                        np->tx_full = 0;
        !          1031:                        netif_resume_tx_queue(dev);
        !          1032:                }
        !          1033: 
        !          1034:                /* Abnormal error summary/uncommon events handlers. */
        !          1035:                if (intr_status & IntrAbnormalSummary)
        !          1036:                        netdev_error(dev, intr_status);
        !          1037: 
        !          1038:                if (--boguscnt < 0) {
        !          1039:                        printk(KERN_WARNING "%s: Too much work at interrupt, "
        !          1040:                                   "status=0x%4.4x.\n",
        !          1041:                                   dev->name, intr_status);
        !          1042:                        writel(0x0021, ioaddr + IntrTimerCtrl);
        !          1043:                        break;
        !          1044:                }
        !          1045:        } while (1);
        !          1046: 
        !          1047:        if (np->msg_level & NETIF_MSG_INTR)
        !          1048:                printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
        !          1049:                           dev->name, (int)readl(ioaddr + IntrStatus));
        !          1050: 
        !          1051:        return;
        !          1052: }
        !          1053: 
        !          1054: /* This routine is logically part of the interrupt handler, but separated
        !          1055:    for clarity and better register allocation. */
        !          1056: static int netdev_rx(struct net_device *dev)
        !          1057: {
        !          1058:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1059:        int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
        !          1060:        u32 desc_status;
        !          1061: 
        !          1062:        if (np->rx_done_q == 0) {
        !          1063:                printk(KERN_ERR "%s:  rx_done_q is NULL!  rx_done is %d. %p.\n",
        !          1064:                           dev->name, np->rx_done, np->tx_done_q);
        !          1065:                return 0;
        !          1066:        }
        !          1067: 
        !          1068:        /* If EOP is set on the next entry, it's a new packet. Send it up. */
        !          1069:        while ((desc_status = le32_to_cpu(np->rx_done_q[np->rx_done].status)) != 0) {
        !          1070:                if (np->msg_level & NETIF_MSG_RX_STATUS)
        !          1071:                        printk(KERN_DEBUG "  netdev_rx() status of %d was %8.8x.\n",
        !          1072:                                   np->rx_done, desc_status);
        !          1073:                if (--boguscnt < 0)
        !          1074:                        break;
        !          1075:                if ( ! (desc_status & RxOK)) {
        !          1076:                        /* There was a error. */
        !          1077:                        if (np->msg_level & NETIF_MSG_RX_ERR)
        !          1078:                                printk(KERN_DEBUG "  netdev_rx() Rx error was %8.8x.\n",
        !          1079:                                           desc_status);
        !          1080:                        np->stats.rx_errors++;
        !          1081:                        if (desc_status & RxFIFOErr)
        !          1082:                                np->stats.rx_fifo_errors++;
        !          1083:                } else {
        !          1084:                        struct sk_buff *skb;
        !          1085:                        u16 pkt_len = desc_status;                      /* Implicitly Truncate */
        !          1086:                        int entry = (desc_status >> 16) & 0x7ff;
        !          1087: 
        !          1088: #ifndef final_version
        !          1089:                        if (np->msg_level & NETIF_MSG_RX_STATUS)
        !          1090:                                printk(KERN_DEBUG "  netdev_rx() normal Rx pkt length %d"
        !          1091:                                           ", bogus_cnt %d.\n",
        !          1092:                                           pkt_len, boguscnt);
        !          1093: #endif
        !          1094:                        /* Check if the packet is long enough to accept without copying
        !          1095:                           to a minimally-sized skbuff. */
        !          1096:                        if (pkt_len < rx_copybreak
        !          1097:                                && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
        !          1098:                                skb->dev = dev;
        !          1099:                                skb_reserve(skb, 2);    /* 16 byte align the IP header */
        !          1100: #if HAS_IP_COPYSUM                     /* Call copy + cksum if available. */
        !          1101:                                eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
        !          1102:                                skb_put(skb, pkt_len);
        !          1103: #else
        !          1104:                                memcpy(skb_put(skb, pkt_len), np->rx_skbuff[entry]->tail,
        !          1105:                                           pkt_len);
        !          1106: #endif
        !          1107:                        } else {
        !          1108:                                char *temp = skb_put(skb = np->rx_skbuff[entry], pkt_len);
        !          1109:                                np->rx_skbuff[entry] = NULL;
        !          1110: #ifndef final_version                          /* Remove after testing. */
        !          1111:                                if (le32desc_to_virt(np->rx_ring[entry].rxaddr & ~3) != temp)
        !          1112:                                        printk(KERN_ERR "%s: Internal fault: The skbuff addresses "
        !          1113:                                                   "do not match in netdev_rx: %p vs. %p / %p.\n",
        !          1114:                                                   dev->name,
        !          1115:                                                   le32desc_to_virt(np->rx_ring[entry].rxaddr),
        !          1116:                                                   skb->head, temp);
        !          1117: #endif
        !          1118:                        }
        !          1119:                        skb->protocol = eth_type_trans(skb, dev);
        !          1120: #ifdef full_rx_status
        !          1121:                        if (np->rx_done_q[np->rx_done].status2 & cpu_to_le32(0x01000000))
        !          1122:                                skb->ip_summed = CHECKSUM_UNNECESSARY;
        !          1123: #endif
        !          1124:                        netif_rx(skb);
        !          1125:                        dev->last_rx = jiffies;
        !          1126:                        np->stats.rx_packets++;
        !          1127:                }
        !          1128:                np->cur_rx++;
        !          1129:                np->rx_done_q[np->rx_done].status = 0;
        !          1130:                np->rx_done = (np->rx_done + 1) & (DONE_Q_SIZE-1);
        !          1131:        }
        !          1132:        writew(np->rx_done, dev->base_addr + CompletionQConsumerIdx);
        !          1133: 
        !          1134:        /* Refill the Rx ring buffers. */
        !          1135:        for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
        !          1136:                struct sk_buff *skb;
        !          1137:                int entry = np->dirty_rx % RX_RING_SIZE;
        !          1138:                if (np->rx_skbuff[entry] == NULL) {
        !          1139:                        skb = dev_alloc_skb(np->rx_buf_sz);
        !          1140:                        np->rx_skbuff[entry] = skb;
        !          1141:                        if (skb == NULL)
        !          1142:                                break;                          /* Better luck next round. */
        !          1143:                        skb->dev = dev;                 /* Mark as being used by this device. */
        !          1144:                        np->rx_ring[entry].rxaddr =
        !          1145:                                virt_to_le32desc(skb->tail) | cpu_to_le32(RxDescValid);
        !          1146:                }
        !          1147:                if (entry == RX_RING_SIZE - 1)
        !          1148:                        np->rx_ring[entry].rxaddr |= cpu_to_le32(RxDescEndRing);
        !          1149:                /* We could defer this until later... */
        !          1150:                writew(entry, dev->base_addr + RxDescQIdx);
        !          1151:        }
        !          1152: 
        !          1153:        if ((np->msg_level & NETIF_MSG_RX_STATUS)
        !          1154:                || memcmp(np->pad0, np->pad0 + 1, sizeof(np->pad0) -1))
        !          1155:                printk(KERN_DEBUG "  exiting netdev_rx() status of %d was %8.8x %d.\n",
        !          1156:                           np->rx_done, desc_status,
        !          1157:                           memcmp(np->pad0, np->pad0 + 1, sizeof(np->pad0) -1));
        !          1158: 
        !          1159:        return 0;
        !          1160: }
        !          1161: 
        !          1162: static void netdev_error(struct net_device *dev, int intr_status)
        !          1163: {
        !          1164:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1165: 
        !          1166:        if (intr_status & LinkChange) {
        !          1167:                int phy_num = np->phys[0];
        !          1168:                if (np->msg_level & NETIF_MSG_LINK)
        !          1169:                        printk(KERN_NOTICE "%s: Link changed: Autonegotiation advertising"
        !          1170:                                   " %4.4x  partner %4.4x.\n", dev->name,
        !          1171:                                   mdio_read(dev, phy_num, 4),
        !          1172:                                   mdio_read(dev, phy_num, 5));
        !          1173:                /* Clear sticky bit. */
        !          1174:                mdio_read(dev, phy_num, 1);
        !          1175:                /* If link beat has returned... */
        !          1176:                if (mdio_read(dev, phy_num, 1) & 0x0004)
        !          1177:                        netif_link_up(dev);
        !          1178:                else
        !          1179:                        netif_link_down(dev);
        !          1180:                check_duplex(dev);
        !          1181:        }
        !          1182:        if (intr_status & StatsMax) {
        !          1183:                get_stats(dev);
        !          1184:        }
        !          1185:        /* Came close to underrunning the Tx FIFO, increase threshold. */
        !          1186:        if (intr_status & IntrTxDataLow)
        !          1187:                writel(++np->tx_threshold, dev->base_addr + TxThreshold);
        !          1188:        /* Ingore expected normal events, and handled abnormal events. */
        !          1189:        if ((intr_status &
        !          1190:                 ~(IntrAbnormalSummary|LinkChange|StatsMax|IntrTxDataLow| 0xFF01))
        !          1191:                && (np->msg_level & NETIF_MSG_DRV))
        !          1192:                printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
        !          1193:                           dev->name, intr_status);
        !          1194:        /* Hmmmmm, it's not clear how to recover from PCI faults. */
        !          1195:        if (intr_status & IntrTxPCIErr)
        !          1196:                np->stats.tx_fifo_errors++;
        !          1197:        if (intr_status & IntrRxPCIErr)
        !          1198:                np->stats.rx_fifo_errors++;
        !          1199: }
        !          1200: 
        !          1201: static struct net_device_stats *get_stats(struct net_device *dev)
        !          1202: {
        !          1203:        long ioaddr = dev->base_addr;
        !          1204:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1205: 
        !          1206:        /* This adapter architecture needs no SMP locks. */
        !          1207: #if LINUX_VERSION_CODE > 0x20119
        !          1208:        np->stats.tx_bytes = readl(ioaddr + 0x57010);
        !          1209:        np->stats.rx_bytes = readl(ioaddr + 0x57044);
        !          1210: #endif
        !          1211:        np->stats.tx_packets = readl(ioaddr + 0x57000);
        !          1212:        np->stats.tx_aborted_errors =
        !          1213:                readl(ioaddr + 0x57024) + readl(ioaddr + 0x57028);
        !          1214:        np->stats.tx_window_errors = readl(ioaddr + 0x57018);
        !          1215:        np->stats.collisions = readl(ioaddr + 0x57004) + readl(ioaddr + 0x57008);
        !          1216: 
        !          1217:        /* The chip only need report frame silently dropped. */
        !          1218:        np->stats.rx_dropped       += readw(ioaddr + RxDMAStatus);
        !          1219:        writew(0, ioaddr + RxDMAStatus);
        !          1220:        np->stats.rx_crc_errors    = readl(ioaddr + 0x5703C);
        !          1221:        np->stats.rx_frame_errors = readl(ioaddr + 0x57040);
        !          1222:        np->stats.rx_length_errors = readl(ioaddr + 0x57058);
        !          1223:        np->stats.rx_missed_errors = readl(ioaddr + 0x5707C);
        !          1224: 
        !          1225:        return &np->stats;
        !          1226: }
        !          1227: 
        !          1228: /* The little-endian AUTODIN II ethernet CRC calculations.
        !          1229:    A big-endian version is also available.
        !          1230:    This is slow but compact code.  Do not use this routine for bulk data,
        !          1231:    use a table-based routine instead.
        !          1232:    This is common code and should be moved to net/core/crc.c.
        !          1233:    Chips may use the upper or lower CRC bits, and may reverse and/or invert
        !          1234:    them.  Select the endian-ness that results in minimal calculations.
        !          1235: */
        !          1236: static unsigned const ethernet_polynomial_le = 0xedb88320U;
        !          1237: static inline unsigned ether_crc_le(int length, unsigned char *data)
        !          1238: {
        !          1239:        unsigned int crc = ~0;  /* Initial value. */
        !          1240:        while(--length >= 0) {
        !          1241:                unsigned char current_octet = *data++;
        !          1242:                int bit;
        !          1243:                for (bit = 8; --bit >= 0; current_octet >>= 1) {
        !          1244:                        if ((crc ^ current_octet) & 1) {
        !          1245:                                crc >>= 1;
        !          1246:                                crc ^= ethernet_polynomial_le;
        !          1247:                        } else
        !          1248:                                crc >>= 1;
        !          1249:                }
        !          1250:        }
        !          1251:        return crc;
        !          1252: }
        !          1253: 
        !          1254: static void set_rx_mode(struct net_device *dev)
        !          1255: {
        !          1256:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1257:        long ioaddr = dev->base_addr;
        !          1258:        u32 rx_mode;
        !          1259:        struct dev_mc_list *mclist;
        !          1260:        int i;
        !          1261: 
        !          1262:        if (dev->flags & IFF_PROMISC) {                 /* Set promiscuous. */
        !          1263:                /* Unconditionally log net taps. */
        !          1264:                printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
        !          1265:                rx_mode = AcceptBroadcast|AcceptAllMulticast|AcceptAll|AcceptMyPhys;
        !          1266:        } else if ((dev->mc_count > np->multicast_filter_limit)
        !          1267:                           ||  (dev->flags & IFF_ALLMULTI)) {
        !          1268:                /* Too many to match, or accept all multicasts. */
        !          1269:                rx_mode = AcceptBroadcast|AcceptAllMulticast|AcceptMyPhys;
        !          1270:        } else if (dev->mc_count <= 15) {
        !          1271:                /* Use the 16 element perfect filter. */
        !          1272:                long filter_addr = ioaddr + 0x56000 + 1*16;
        !          1273:                for (i = 1, mclist = dev->mc_list; mclist  &&  i <= dev->mc_count;
        !          1274:                         i++, mclist = mclist->next) {
        !          1275:                        u16 *eaddrs = (u16 *)mclist->dmi_addr;
        !          1276:                        writew(cpu_to_be16(eaddrs[2]), filter_addr); filter_addr += 4;
        !          1277:                        writew(cpu_to_be16(eaddrs[1]), filter_addr); filter_addr += 4;
        !          1278:                        writew(cpu_to_be16(eaddrs[0]), filter_addr); filter_addr += 8;
        !          1279:                }
        !          1280:                while (i++ < 16) {
        !          1281:                        writew(0xffff, filter_addr); filter_addr += 4;
        !          1282:                        writew(0xffff, filter_addr); filter_addr += 4;
        !          1283:                        writew(0xffff, filter_addr); filter_addr += 8;
        !          1284:                }
        !          1285:                rx_mode = AcceptBroadcast | AcceptMyPhys;
        !          1286:        } else {
        !          1287:                /* Must use a multicast hash table. */
        !          1288:                long filter_addr;
        !          1289:                u16 mc_filter[32];                      /* Multicast hash filter */
        !          1290: 
        !          1291:                memset(mc_filter, 0, sizeof(mc_filter));
        !          1292:                for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
        !          1293:                         i++, mclist = mclist->next) {
        !          1294:                        set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 23, mc_filter);
        !          1295:                }
        !          1296:                /* Clear the perfect filter list. */
        !          1297:                filter_addr = ioaddr + 0x56000 + 1*16;
        !          1298:                for (i = 1; i < 16; i++) {
        !          1299:                        writew(0xffff, filter_addr); filter_addr += 4;
        !          1300:                        writew(0xffff, filter_addr); filter_addr += 4;
        !          1301:                        writew(0xffff, filter_addr); filter_addr += 8;
        !          1302:                }
        !          1303:                for (filter_addr=ioaddr + 0x56100, i=0; i < 32; filter_addr+= 16, i++){
        !          1304:                        np->mc_filter[i] = mc_filter[i];
        !          1305:                        writew(mc_filter[i], filter_addr);
        !          1306:                }
        !          1307:                rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
        !          1308:        }
        !          1309:        writel(rx_mode, ioaddr + RxFilterMode);
        !          1310: }
        !          1311: 
        !          1312: /*
        !          1313:   Handle user-level ioctl() calls.
        !          1314:   We must use two numeric constants as the key because some clueless person
        !          1315:   changed the value for the symbolic name.
        !          1316: */
        !          1317: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
        !          1318: {
        !          1319:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1320:        u16 *data = (u16 *)&rq->ifr_data;
        !          1321:        u32 *data32 = (void *)&rq->ifr_data;
        !          1322: 
        !          1323:        switch(cmd) {
        !          1324:        case 0x8947: case 0x89F0:
        !          1325:                /* SIOCGMIIPHY: Get the address of the PHY in use. */
        !          1326:                data[0] = np->phys[0] & 0x1f;
        !          1327:                /* Fall Through */
        !          1328:        case 0x8948: case 0x89F1:
        !          1329:                /* SIOCGMIIREG: Read the specified MII register. */
        !          1330:                data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
        !          1331:                return 0;
        !          1332:        case 0x8949: case 0x89F2:
        !          1333:                /* SIOCSMIIREG: Write the specified MII register */
        !          1334:                if (!capable(CAP_NET_ADMIN))
        !          1335:                        return -EPERM;
        !          1336:                if (data[0] == np->phys[0]) {
        !          1337:                        u16 value = data[2];
        !          1338:                        switch (data[1]) {
        !          1339:                        case 0:
        !          1340:                                /* Check for autonegotiation on or reset. */
        !          1341:                                np->medialock = (value & 0x9000) ? 0 : 1;
        !          1342:                                if (np->medialock)
        !          1343:                                        np->full_duplex = (value & 0x0100) ? 1 : 0;
        !          1344:                                break;
        !          1345:                        case 4: np->advertising = value; break;
        !          1346:                        }
        !          1347:                        check_duplex(dev);
        !          1348:                }
        !          1349:                mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
        !          1350:                return 0;
        !          1351:        case SIOCGPARAMS:
        !          1352:                data32[0] = np->msg_level;
        !          1353:                data32[1] = np->multicast_filter_limit;
        !          1354:                data32[2] = np->max_interrupt_work;
        !          1355:                data32[3] = np->rx_copybreak;
        !          1356:                return 0;
        !          1357:        case SIOCSPARAMS:
        !          1358:                if (!capable(CAP_NET_ADMIN))
        !          1359:                        return -EPERM;
        !          1360:                np->msg_level = data32[0];
        !          1361:                np->multicast_filter_limit = data32[1];
        !          1362:                np->max_interrupt_work = data32[2];
        !          1363:                np->rx_copybreak = data32[3];
        !          1364:                return 0;
        !          1365:        default:
        !          1366:                return -EOPNOTSUPP;
        !          1367:        }
        !          1368: }
        !          1369: 
        !          1370: static int netdev_close(struct net_device *dev)
        !          1371: {
        !          1372:        long ioaddr = dev->base_addr;
        !          1373:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1374:        int i;
        !          1375: 
        !          1376:        netif_stop_tx_queue(dev);
        !          1377: 
        !          1378:        if (np->msg_level & NETIF_MSG_IFDOWN) {
        !          1379:                printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %4.4x.\n",
        !          1380:                           dev->name, (int)readl(ioaddr + IntrStatus));
        !          1381:                printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d,  Rx %d / %d.\n",
        !          1382:                           dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
        !          1383:        }
        !          1384: 
        !          1385:        /* Disable interrupts by clearing the interrupt mask. */
        !          1386:        writel(0, ioaddr + IntrEnable);
        !          1387: 
        !          1388:        /* Stop the chip's Tx and Rx processes. */
        !          1389:        writel(0, ioaddr + GenCtrl);
        !          1390: 
        !          1391:        del_timer(&np->timer);
        !          1392: 
        !          1393: #ifdef __i386__
        !          1394:        if (np->msg_level & NETIF_MSG_IFDOWN) {
        !          1395:                printk("\n"KERN_DEBUG"  Tx ring at %8.8x:\n",
        !          1396:                           (int)virt_to_bus(np->tx_ring));
        !          1397:                for (i = 0; i < 8 /* TX_RING_SIZE is huge! */; i++)
        !          1398:                        printk(KERN_DEBUG " #%d desc. %8.8x %8.8x -> %8.8x.\n",
        !          1399:                                   i, np->tx_ring[i].status, np->tx_ring[i].addr,
        !          1400:                                   np->tx_done_q[i].status);
        !          1401:                printk(KERN_DEBUG "  Rx ring at %8.8x -> %p:\n",
        !          1402:                           (int)virt_to_bus(np->rx_ring), np->rx_done_q);
        !          1403:                if (np->rx_done_q)
        !          1404:                        for (i = 0; i < 8 /* RX_RING_SIZE */; i++) {
        !          1405:                                printk(KERN_DEBUG " #%d desc. %8.8x -> %8.8x\n",
        !          1406:                                           i, np->rx_ring[i].rxaddr, np->rx_done_q[i].status);
        !          1407:                }
        !          1408:        }
        !          1409: #endif /* __i386__ debugging only */
        !          1410: 
        !          1411:        free_irq(dev->irq, dev);
        !          1412: 
        !          1413:        /* Free all the skbuffs in the Rx queue. */
        !          1414:        for (i = 0; i < RX_RING_SIZE; i++) {
        !          1415:                np->rx_ring[i].rxaddr = 0xBADF00D0; /* An invalid address. */
        !          1416:                if (np->rx_skbuff[i]) {
        !          1417: #if LINUX_VERSION_CODE < 0x20100
        !          1418:                        np->rx_skbuff[i]->free = 1;
        !          1419: #endif
        !          1420:                        dev_free_skb(np->rx_skbuff[i]);
        !          1421:                }
        !          1422:                np->rx_skbuff[i] = 0;
        !          1423:        }
        !          1424:        for (i = 0; i < TX_RING_SIZE; i++) {
        !          1425:                if (np->tx_skbuff[i])
        !          1426:                        dev_free_skb(np->tx_skbuff[i]);
        !          1427:                np->tx_skbuff[i] = 0;
        !          1428:        }
        !          1429: 
        !          1430:        MOD_DEC_USE_COUNT;
        !          1431: 
        !          1432:        return 0;
        !          1433: }
        !          1434: 
        !          1435: 
        !          1436: static int starfire_pwr_event(void *dev_instance, int event)
        !          1437: {
        !          1438:        struct net_device *dev = dev_instance;
        !          1439:        struct netdev_private *np = (struct netdev_private *)dev->priv;
        !          1440:        long ioaddr = dev->base_addr;
        !          1441: 
        !          1442:        if (np->msg_level & NETIF_MSG_LINK)
        !          1443:                printk(KERN_DEBUG "%s: Handling power event %d.\n", dev->name, event);
        !          1444:        switch(event) {
        !          1445:        case DRV_ATTACH:
        !          1446:                MOD_INC_USE_COUNT;
        !          1447:                break;
        !          1448:        case DRV_SUSPEND:
        !          1449:                /* Disable interrupts, stop Tx and Rx. */
        !          1450:                writel(0x0000, ioaddr + IntrEnable);
        !          1451:                writel(0, ioaddr + GenCtrl);
        !          1452:                break;
        !          1453:        case DRV_RESUME:
        !          1454:                /* This is incomplete: we must factor start_chip() out of open(). */
        !          1455:                writel(np->tx_threshold, ioaddr + TxThreshold);
        !          1456:                writel(interrupt_mitigation, ioaddr + IntrTimerCtrl);
        !          1457:                set_rx_mode(dev);
        !          1458:                writel(np->intr_enable, ioaddr + IntrEnable);
        !          1459:                writel(TxEnable|RxEnable, ioaddr + GenCtrl);
        !          1460:                break;
        !          1461:        case DRV_DETACH: {
        !          1462:                struct net_device **devp, **next;
        !          1463:                if (dev->flags & IFF_UP) {
        !          1464:                        /* Some, but not all, kernel versions close automatically. */
        !          1465:                        dev_close(dev);
        !          1466:                        dev->flags &= ~(IFF_UP|IFF_RUNNING);
        !          1467:                }
        !          1468:                unregister_netdev(dev);
        !          1469:                release_region(dev->base_addr, pci_id_tbl[np->chip_id].io_size);
        !          1470: #ifndef USE_IO_OPS
        !          1471:                iounmap((char *)dev->base_addr);
        !          1472: #endif
        !          1473:                for (devp = &root_net_dev; *devp; devp = next) {
        !          1474:                        next = &((struct netdev_private *)(*devp)->priv)->next_module;
        !          1475:                        if (*devp == dev) {
        !          1476:                                *devp = *next;
        !          1477:                                break;
        !          1478:                        }
        !          1479:                }
        !          1480:                if (np->priv_addr)
        !          1481:                        kfree(np->priv_addr);
        !          1482:                kfree(dev);
        !          1483:                MOD_DEC_USE_COUNT;
        !          1484:                break;
        !          1485:        }
        !          1486:        }
        !          1487: 
        !          1488:        return 0;
        !          1489: }
        !          1490: 
        !          1491: 
        !          1492: #ifdef MODULE
        !          1493: int init_module(void)
        !          1494: {
        !          1495:        if (debug >= NETIF_MSG_DRV)     /* Emit version even if no cards detected. */
        !          1496:                printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
        !          1497:        if (pci_drv_register(&starfire_drv_id, NULL)) {
        !          1498:                printk(KERN_INFO " No Starfire adapters detected, driver not loaded.\n");
        !          1499:                return -ENODEV;
        !          1500:        }
        !          1501:        return 0;
        !          1502: }
        !          1503: 
        !          1504: void cleanup_module(void)
        !          1505: {
        !          1506:        struct net_device *next_dev;
        !          1507: 
        !          1508:        pci_drv_unregister(&starfire_drv_id);
        !          1509: 
        !          1510:        /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
        !          1511:        while (root_net_dev) {
        !          1512:                struct netdev_private *np = (void *)(root_net_dev->priv);
        !          1513:                unregister_netdev(root_net_dev);
        !          1514:                iounmap((char *)(root_net_dev->base_addr));
        !          1515:                next_dev = np->next_module;
        !          1516:                if (np->tx_done_q) free_page((long)np->tx_done_q);
        !          1517:                if (np->rx_done_q) free_page((long)np->rx_done_q);
        !          1518:                if (np->priv_addr) kfree(np->priv_addr);
        !          1519:                kfree(root_net_dev);
        !          1520:                root_net_dev = next_dev;
        !          1521:        }
        !          1522: }
        !          1523: 
        !          1524: #endif  /* MODULE */
        !          1525: 
        !          1526: /*
        !          1527:  * Local variables:
        !          1528:  *  compile-command: "make KERNVER=`uname -r` starfire.o"
        !          1529:  *  compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c starfire.c"
        !          1530:  *  simple-compile-command: "gcc -DMODULE -O6 -c starfire.c"
        !          1531:  *  c-indent-level: 4
        !          1532:  *  c-basic-offset: 4
        !          1533:  *  tab-width: 4
        !          1534:  * End:
        !          1535:  */

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