Return to yellowfin.c CVS log

Up to [GnuMach] / Gnu-Mach / linux / src / drivers / net

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

1.1     ! root        1: /* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */
        !             2: /*
        !             3:        Written 1997-1998 by Donald Becker.
        !             4: 
        !             5:        This software may be used and distributed according to the terms
        !             6:        of the GNU Public License, incorporated herein by reference.
        !             7: 
        !             8:        This driver is for the Packet Engines G-NIC PCI Gigabit Ethernet adapter.
        !             9:        It also supports the Symbios Logic version of the same chip core.
        !            10: 
        !            11:        The author may be reached as [email protected], or C/O
        !            12:        Center of Excellence in Space Data and Information Sciences
        !            13:           Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
        !            14: 
        !            15:        Support and updates available at
        !            16:        http://cesdis.gsfc.nasa.gov/linux/drivers/yellowfin.html
        !            17: */
        !            18: 
        !            19: static const char *version = "yellowfin.c:v0.99A 4/7/98 [email protected]\n";
        !            20: 
        !            21: /* A few user-configurable values. */
        !            22: 
        !            23: static int max_interrupt_work = 20;
        !            24: static int min_pci_latency = 64;
        !            25: static int mtu = 0;
        !            26: #ifdef YF_PROTOTYPE                    /* Support for prototype hardware errata. */
        !            27: /* System-wide count of bogus-rx frames. */
        !            28: static int bogus_rx = 0;
        !            29: static int dma_ctrl = 0x004A0263;                      /* Constrained by errata */
        !            30: static int fifo_cfg = 0x0020;                          /* Bypass external Tx FIFO. */
        !            31: #elif YF_NEW                                   /* A future perfect board :->.  */
        !            32: static int dma_ctrl = 0x00CAC277;                      /* Override when loading module! */
        !            33: static int fifo_cfg = 0x0028;
        !            34: #else
        !            35: static int dma_ctrl = 0x004A0263;                      /* Constrained by errata */
        !            36: static int fifo_cfg = 0x0020;                          /* Bypass external Tx FIFO. */
        !            37: #endif
        !            38: 
        !            39: /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
        !            40:    Setting to > 1518 effectively disables this feature. */
        !            41: static const int rx_copybreak = 100;
        !            42: 
        !            43: /* Keep the ring sizes a power of two for efficiency.
        !            44:    Making the Tx ring too large decreases the effectiveness of channel
        !            45:    bonding and packet priority.
        !            46:    There are no ill effects from too-large receive rings. */
        !            47: #define TX_RING_SIZE   16
        !            48: #define RX_RING_SIZE   32
        !            49: 
        !            50: /* Operational parameters that usually are not changed. */
        !            51: /* Time in jiffies before concluding the transmitter is hung. */
        !            52: #define TX_TIMEOUT  ((2000*HZ)/1000)
        !            53: 
        !            54: #include <linux/config.h>
        !            55: #ifdef MODULE
        !            56: #ifdef MODVERSIONS
        !            57: #include <linux/modversions.h>
        !            58: #endif
        !            59: #include <linux/module.h>
        !            60: #include <linux/version.h>
        !            61: #else
        !            62: #define MOD_INC_USE_COUNT
        !            63: #define MOD_DEC_USE_COUNT
        !            64: #endif
        !            65: 
        !            66: #include <linux/kernel.h>
        !            67: #include <linux/sched.h>
        !            68: #include <linux/string.h>
        !            69: #include <linux/timer.h>
        !            70: #include <linux/ptrace.h>
        !            71: #include <linux/errno.h>
        !            72: #include <linux/ioport.h>
        !            73: #include <linux/malloc.h>
        !            74: #include <linux/interrupt.h>
        !            75: #include <linux/pci.h>
        !            76: #include <linux/bios32.h>
        !            77: #include <asm/processor.h>             /* Processor type for cache alignment. */
        !            78: #include <asm/bitops.h>
        !            79: #include <asm/io.h>
        !            80: 
        !            81: #include <linux/netdevice.h>
        !            82: #include <linux/etherdevice.h>
        !            83: #include <linux/skbuff.h>
        !            84: 
        !            85: /* Kernel compatibility defines, common to David Hind's PCMCIA package.
        !            86:    This is only in the support-all-kernels source code. */
        !            87: #include <linux/version.h>             /* Evil, but neccessary */
        !            88: 
        !            89: #if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10300
        !            90: #define RUN_AT(x) (x)                  /* What to put in timer->expires.  */
        !            91: #define DEV_ALLOC_SKB(len) alloc_skb(len, GFP_ATOMIC)
        !            92: #define virt_to_bus(addr)  ((unsigned long)addr)
        !            93: #define bus_to_virt(addr) ((void*)addr)
        !            94: 
        !            95: #else  /* 1.3.0 and later */
        !            96: #define RUN_AT(x) (jiffies + (x))
        !            97: #define DEV_ALLOC_SKB(len) dev_alloc_skb(len + 2)
        !            98: #endif
        !            99: 
        !           100: #if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10338
        !           101: #ifdef MODULE
        !           102: #if !defined(CONFIG_MODVERSIONS) && !defined(__NO_VERSION__)
        !           103: char kernel_version[] = UTS_RELEASE;
        !           104: #endif
        !           105: #else
        !           106: #undef MOD_INC_USE_COUNT
        !           107: #define MOD_INC_USE_COUNT
        !           108: #undef MOD_DEC_USE_COUNT
        !           109: #define MOD_DEC_USE_COUNT
        !           110: #endif
        !           111: #endif /* 1.3.38 */
        !           112: 
        !           113: #if (LINUX_VERSION_CODE >= 0x10344)
        !           114: #define NEW_MULTICAST
        !           115: #include <linux/delay.h>
        !           116: #endif
        !           117: #if (LINUX_VERSION_CODE >= 0x20100)
        !           118: char kernel_version[] = UTS_RELEASE;
        !           119: #endif
        !           120: #ifdef SA_SHIRQ
        !           121: #define IRQ(irq, dev_id, pt_regs) (irq, dev_id, pt_regs)
        !           122: #else
        !           123: #define IRQ(irq, dev_id, pt_regs) (irq, pt_regs)
        !           124: #endif
        !           125: #if (LINUX_VERSION_CODE < 0x20123)
        !           126: #define test_and_set_bit(val, addr) set_bit(val, addr)
        !           127: #endif
        !           128: 
        !           129: static const char *card_name = "Yellowfin G-NIC Gbit Ethernet";
        !           130: 
        !           131: /* The PCI I/O space extent. */
        !           132: #define YELLOWFIN_TOTAL_SIZE 0x100
        !           133: 
        !           134: #ifdef HAVE_DEVLIST
        !           135: struct netdev_entry yellowfin_drv =
        !           136: {card_name, yellowfin_pci_probe, YELLOWFIN_TOTAL_SIZE, NULL};
        !           137: #endif
        !           138: 
        !           139: #ifdef YELLOWFIN_DEBUG
        !           140: int yellowfin_debug = YELLOWFIN_DEBUG;
        !           141: #else
        !           142: int yellowfin_debug = 1;
        !           143: #endif
        !           144: 
        !           145: /*
        !           146:                                Theory of Operation
        !           147: 
        !           148: I. Board Compatibility
        !           149: 
        !           150: This device driver is designed for the Packet Engines "Yellowfin" Gigabit
        !           151: Ethernet adapter.  The only PCA currently supported is the G-NIC 64-bit
        !           152: PCI card.
        !           153: 
        !           154: II. Board-specific settings
        !           155: 
        !           156: PCI bus devices are configured by the system at boot time, so no jumpers
        !           157: need to be set on the board.  The system BIOS preferably should assign the
        !           158: PCI INTA signal to an otherwise unused system IRQ line.
        !           159: Note: Kernel versions earlier than 1.3.73 do not support shared PCI
        !           160: interrupt lines.
        !           161: 
        !           162: III. Driver operation
        !           163: 
        !           164: IIIa. Ring buffers
        !           165: 
        !           166: The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple.
        !           167: This is a descriptor list scheme similar to that used by the EEPro100 and
        !           168: Tulip.  This driver uses two statically allocated fixed-size descriptor lists
        !           169: formed into rings by a branch from the final descriptor to the beginning of
        !           170: the list.  The ring sizes are set at compile time by RX/TX_RING_SIZE.
        !           171: 
        !           172: The driver allocates full frame size skbuffs for the Rx ring buffers at
        !           173: open() time and passes the skb->data field to the Yellowfin as receive data
        !           174: buffers.  When an incoming frame is less than RX_COPYBREAK bytes long,
        !           175: a fresh skbuff is allocated and the frame is copied to the new skbuff.
        !           176: When the incoming frame is larger, the skbuff is passed directly up the
        !           177: protocol stack and replaced by a newly allocated skbuff.
        !           178: 
        !           179: The RX_COPYBREAK value is chosen to trade-off the memory wasted by
        !           180: using a full-sized skbuff for small frames vs. the copying costs of larger
        !           181: frames.  For small frames the copying cost is negligible (esp. considering
        !           182: that we are pre-loading the cache with immediately useful header
        !           183: information).  For large frames the copying cost is non-trivial, and the
        !           184: larger copy might flush the cache of useful data.
        !           185: 
        !           186: IIIC. Synchronization
        !           187: 
        !           188: The driver runs as two independent, single-threaded flows of control.  One
        !           189: is the send-packet routine, which enforces single-threaded use by the
        !           190: dev->tbusy flag.  The other thread is the interrupt handler, which is single
        !           191: threaded by the hardware and other software.
        !           192: 
        !           193: The send packet thread has partial control over the Tx ring and 'dev->tbusy'
        !           194: flag.  It sets the tbusy flag whenever it's queuing a Tx packet. If the next
        !           195: queue slot is empty, it clears the tbusy flag when finished otherwise it sets
        !           196: the 'yp->tx_full' flag.
        !           197: 
        !           198: The interrupt handler has exclusive control over the Rx ring and records stats
        !           199: from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
        !           200: empty by incrementing the dirty_tx mark. Iff the 'yp->tx_full' flag is set, it
        !           201: clears both the tx_full and tbusy flags.
        !           202: 
        !           203: IV. Notes
        !           204: 
        !           205: Thanks to Kim Stearns of Packet Engines for providing a pair of G-NIC boards.
        !           206: 
        !           207: IVb. References
        !           208: 
        !           209: Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential
        !           210: http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html
        !           211: 
        !           212: IVc. Errata
        !           213: 
        !           214: See Packet Engines confidential appendix.
        !           215: 
        !           216: */
        !           217: 
        !           218: /* A few values that may be tweaked. */
        !           219: #define PKT_BUF_SZ             1536                    /* Size of each temporary Rx buffer.*/
        !           220: 
        !           221: #ifndef PCI_VENDOR_ID_PKT_ENG          /* To be defined in linux/pci.h */
        !           222: #define PCI_VENDOR_ID_PKT_ENG                  0x1000 /* Hmm, likely number.. */
        !           223: #define PCI_DEVICE_ID_YELLOWFIN                        0x0702
        !           224: #endif
        !           225: 
        !           226: /* The rest of these values should never change. */
        !           227: 
        !           228: static void yellowfin_timer(unsigned long data);
        !           229: 
        !           230: /* Offsets to the Yellowfin registers.  Various sizes and alignments. */
        !           231: enum yellowfin_offsets {
        !           232:        TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C,
        !           233:        TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18,
        !           234:        RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C,
        !           235:        RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58,
        !           236:        EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86,
        !           237:        ChipRev=0x8C, DMACtrl=0x90, Cnfg=0xA0, RxDepth=0xB8, FlowCtrl=0xBC,
        !           238:        AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8,
        !           239: };
        !           240: 
        !           241: /* The Yellowfin Rx and Tx buffer descriptors. */
        !           242: struct yellowfin_desc {
        !           243:        u16 request_cnt;
        !           244:        u16 cmd;
        !           245:        u32 addr;
        !           246:        u32 branch_addr;
        !           247:        u16 result_cnt;
        !           248:        u16 status;
        !           249: };
        !           250: 
        !           251: struct tx_status_words {
        !           252:        u16 tx_cnt;
        !           253:        u16 tx_errs;
        !           254:        u16 total_tx_cnt;
        !           255:        u16 paused;
        !           256: };
        !           257: 
        !           258: /* Bits in yellowfin_desc.cmd */
        !           259: enum desc_cmd_bits {
        !           260:        CMD_TX_PKT=0x1000, CMD_RX_BUF=0x2000, CMD_TXSTATUS=0x3000,
        !           261:        CMD_NOP=0x6000, CMD_STOP=0x7000,
        !           262:        BRANCH_ALWAYS=0x0C, INTR_ALWAYS=0x30, WAIT_ALWAYS=0x03,
        !           263:        BRANCH_IFTRUE=0x04,
        !           264: };
        !           265: 
        !           266: /* Bits in yellowfin_desc.status */
        !           267: enum desc_status_bits { RX_EOP=0x0040, };
        !           268: 
        !           269: /* Bits in the interrupt status/mask registers. */
        !           270: enum intr_status_bits {
        !           271:        IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08,
        !           272:        IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80,
        !           273:        IntrEarlyRx=0x100, IntrWakeup=0x200, };
        !           274: 
        !           275: struct yellowfin_private {
        !           276:        /* Descriptor rings first for alignment.  Tx requires a second descriptor
        !           277:           for status. */
        !           278:        struct yellowfin_desc rx_ring[RX_RING_SIZE];
        !           279:        struct yellowfin_desc tx_ring[TX_RING_SIZE*2];
        !           280:        const char *product_name;
        !           281:        struct device *next_module;
        !           282:        /* The saved address of a sent-in-place packet/buffer, for skfree(). */
        !           283:        struct sk_buff* tx_skbuff[TX_RING_SIZE];
        !           284:        struct tx_status_words tx_status[TX_RING_SIZE];
        !           285:        /* The addresses of receive-in-place skbuffs. */
        !           286:        struct sk_buff* rx_skbuff[RX_RING_SIZE];
        !           287:        int chip_id;
        !           288:        struct enet_statistics stats;
        !           289:        struct timer_list timer;        /* Media selection timer. */
        !           290:        int in_interrupt;
        !           291:        unsigned int cur_rx, cur_tx;            /* The next free ring entry */
        !           292:        unsigned int dirty_rx, dirty_tx;        /* The ring entries to be free()ed. */
        !           293:        unsigned int tx_full:1;                         /* The Tx queue is full. */
        !           294:        unsigned int full_duplex:1;                     /* Full-duplex operation requested. */
        !           295:        unsigned int medialock:1;                       /* Do not sense media. */
        !           296:        unsigned int default_port:4;            /* Last dev->if_port value. */
        !           297:        u32 pad[4];                                                     /* Used for 32-byte alignment */
        !           298: };
        !           299: 
        !           300: #ifdef MODULE
        !           301: /* Used to pass the media type, etc. */
        !           302: #define MAX_UNITS 8                            /* More are supported, limit only on options */
        !           303: static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
        !           304: 
        !           305: #if LINUX_VERSION_CODE > 0x20115
        !           306: MODULE_AUTHOR("Donald Becker <[email protected]>");
        !           307: MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC Gigabit Ethernet driver");
        !           308: MODULE_PARM(max_interrupt_work, "i");
        !           309: MODULE_PARM(min_pci_latency, "i");
        !           310: MODULE_PARM(mtu, "i");
        !           311: MODULE_PARM(debug, "i");
        !           312: MODULE_PARM(rx_copybreak, "i");
        !           313: MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
        !           314: #endif
        !           315: 
        !           316: #endif
        !           317: 
        !           318: static struct device *yellowfin_probe1(struct device *dev, int ioaddr, int irq,
        !           319:                                                                   int chip_id, int options);
        !           320: static int yellowfin_open(struct device *dev);
        !           321: static void yellowfin_timer(unsigned long data);
        !           322: static void yellowfin_tx_timeout(struct device *dev);
        !           323: static void yellowfin_init_ring(struct device *dev);
        !           324: static int yellowfin_start_xmit(struct sk_buff *skb, struct device *dev);
        !           325: static int yellowfin_rx(struct device *dev);
        !           326: static void yellowfin_interrupt IRQ(int irq, void *dev_instance, struct pt_regs *regs);
        !           327: static int yellowfin_close(struct device *dev);
        !           328: static struct enet_statistics *yellowfin_get_stats(struct device *dev);
        !           329: #ifdef NEW_MULTICAST
        !           330: static void set_rx_mode(struct device *dev);
        !           331: #else
        !           332: static void set_rx_mode(struct device *dev, int num_addrs, void *addrs);
        !           333: #endif
        !           334: 
        !           335: 
        !           336: 
        !           337: #ifdef MODULE
        !           338: /* A list of all installed Yellowfin devices, for removing the driver module. */
        !           339: static struct device *root_yellowfin_dev = NULL;
        !           340: #endif
        !           341: 
        !           342: int yellowfin_probe(struct device *dev)
        !           343: {
        !           344:        int cards_found = 0;
        !           345:        static int pci_index = 0;       /* Static, for multiple probe calls. */
        !           346: 
        !           347:        /* Ideally we would detect all network cards in slot order.  That would
        !           348:           be best done a central PCI probe dispatch, which wouldn't work
        !           349:           well with the current structure.  So instead we detect just the
        !           350:           Yellowfin cards in slot order. */
        !           351: 
        !           352:        if (pcibios_present()) {
        !           353:                unsigned char pci_bus, pci_device_fn;
        !           354: 
        !           355:                for (;pci_index < 0xff; pci_index++) {
        !           356:                        u8 pci_irq_line, pci_latency;
        !           357:                        u16 pci_command, vendor, device;
        !           358:                        u32 pci_ioaddr, chip_idx = 0;
        !           359: 
        !           360: #ifdef REVERSE_PROBE_ORDER
        !           361:                        if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8,
        !           362:                                                                        0xfe - pci_index,
        !           363:                                                                        &pci_bus, &pci_device_fn)
        !           364:                                != PCIBIOS_SUCCESSFUL)
        !           365:                                continue;
        !           366: #else
        !           367:                        if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8,
        !           368:                                                                        pci_index,
        !           369:                                                                        &pci_bus, &pci_device_fn)
        !           370:                                != PCIBIOS_SUCCESSFUL)
        !           371:                                break;
        !           372: #endif
        !           373:                        pcibios_read_config_word(pci_bus, pci_device_fn,
        !           374:                                                                         PCI_VENDOR_ID, &vendor);
        !           375:                        pcibios_read_config_word(pci_bus, pci_device_fn,
        !           376:                                                                         PCI_DEVICE_ID, &device);
        !           377:                        pcibios_read_config_byte(pci_bus, pci_device_fn,
        !           378:                                                                         PCI_INTERRUPT_LINE, &pci_irq_line);
        !           379:                        pcibios_read_config_dword(pci_bus, pci_device_fn,
        !           380:                                                                          PCI_BASE_ADDRESS_0, &pci_ioaddr);
        !           381:                        /* Remove I/O space marker in bit 0. */
        !           382:                        pci_ioaddr &= ~3;
        !           383: 
        !           384:                        if (vendor != PCI_VENDOR_ID_PKT_ENG)
        !           385:                                continue;
        !           386: 
        !           387:                        if (device != PCI_DEVICE_ID_YELLOWFIN)
        !           388:                                continue;
        !           389: 
        !           390:                        if (yellowfin_debug > 2)
        !           391:                                printk("Found Packet Engines Yellowfin G-NIC at I/O %#x, IRQ %d.\n",
        !           392:                                           pci_ioaddr, pci_irq_line);
        !           393: 
        !           394:                        if (check_region(pci_ioaddr, YELLOWFIN_TOTAL_SIZE))
        !           395:                                continue;
        !           396: 
        !           397: #ifdef MODULE
        !           398:                        dev = yellowfin_probe1(dev, pci_ioaddr, pci_irq_line, chip_idx,
        !           399:                                                 cards_found < MAX_UNITS ? options[cards_found] : 0);
        !           400: #else
        !           401:                        dev = yellowfin_probe1(dev, pci_ioaddr, pci_irq_line, chip_idx,
        !           402:                                                 dev ? dev->mem_start : 0);
        !           403: #endif
        !           404: 
        !           405:                        if (dev) {
        !           406:                          /* Get and check the bus-master and latency values. */
        !           407:                          pcibios_read_config_word(pci_bus, pci_device_fn,
        !           408:                                                                           PCI_COMMAND, &pci_command);
        !           409:                          if ( ! (pci_command & PCI_COMMAND_MASTER)) {
        !           410:                                printk("  PCI Master Bit has not been set! Setting...\n");
        !           411:                                pci_command |= PCI_COMMAND_MASTER;
        !           412:                                pcibios_write_config_word(pci_bus, pci_device_fn,
        !           413:                                                                                  PCI_COMMAND, pci_command);
        !           414:                          }
        !           415:                          pcibios_read_config_byte(pci_bus, pci_device_fn,
        !           416:                                                                           PCI_LATENCY_TIMER, &pci_latency);
        !           417:                          if (pci_latency < min_pci_latency) {
        !           418:                                printk("  PCI latency timer (CFLT) is unreasonably low at %d."
        !           419:                                           "  Setting to %d clocks.\n",
        !           420:                                           pci_latency, min_pci_latency);
        !           421:                                pcibios_write_config_byte(pci_bus, pci_device_fn,
        !           422:                                                                                  PCI_LATENCY_TIMER, min_pci_latency);
        !           423:                          } else if (yellowfin_debug > 1)
        !           424:                                printk("  PCI latency timer (CFLT) is %#x.\n", pci_latency);
        !           425:                          dev = 0;
        !           426:                          cards_found++;
        !           427:                        }
        !           428:                }
        !           429:        }
        !           430: 
        !           431: #if defined (MODULE)
        !           432:        return cards_found;
        !           433: #else
        !           434:        return 0;
        !           435: #endif
        !           436: }
        !           437: 
        !           438: static struct device *yellowfin_probe1(struct device *dev, int ioaddr, int irq,
        !           439:                                                                   int chip_id, int options)
        !           440: {
        !           441:        static int did_version = 0;                     /* Already printed version info. */
        !           442:        struct yellowfin_private *yp;
        !           443:        int i;
        !           444: 
        !           445:        if (yellowfin_debug > 0  &&  did_version++ == 0)
        !           446:                printk(version);
        !           447: 
        !           448:        dev = init_etherdev(dev, sizeof(struct yellowfin_private));
        !           449: 
        !           450:        printk("%s: P-E Yellowfin type %8x at %#3x, ",
        !           451:                   dev->name, inl(ioaddr + ChipRev), ioaddr);
        !           452: 
        !           453:        for (i = 0; i < 5; i++)
        !           454:                printk("%2.2x:", inb(ioaddr + StnAddr + i));
        !           455:        printk("%2.2x, IRQ %d.\n", inb(ioaddr + StnAddr + i), irq);
        !           456:        for (i = 0; i < 6; i++)
        !           457:                dev->dev_addr[i] = inb(ioaddr + StnAddr + i);
        !           458: 
        !           459:        /* Reset the chip. */
        !           460:        outl(0x80000000, ioaddr + DMACtrl);
        !           461: 
        !           462: 
        !           463:        /* We do a request_region() only to register /proc/ioports info. */
        !           464:        request_region(ioaddr, YELLOWFIN_TOTAL_SIZE, card_name);
        !           465: 
        !           466:        dev->base_addr = ioaddr;
        !           467:        dev->irq = irq;
        !           468: 
        !           469:        /* Make certain the descriptor lists are aligned. */
        !           470:        yp = (void *)(((long)kmalloc(sizeof(*yp), GFP_KERNEL) + 31) & ~31);
        !           471:        memset(yp, 0, sizeof(*yp));
        !           472:        dev->priv = yp;
        !           473: 
        !           474: #ifdef MODULE
        !           475:        yp->next_module = root_yellowfin_dev;
        !           476:        root_yellowfin_dev = dev;
        !           477: #endif
        !           478: 
        !           479:        yp->chip_id = chip_id;
        !           480: 
        !           481:        yp->full_duplex = 1;
        !           482: #ifdef YELLOWFIN_DEFAULT_MEDIA
        !           483:        yp->default_port = YELLOWFIN_DEFAULT_MEDIA;
        !           484: #endif
        !           485: #ifdef YELLOWFIN_NO_MEDIA_SWITCH
        !           486:        yp->medialock = 1;
        !           487: #endif
        !           488: 
        !           489:        /* The lower four bits are the media type. */
        !           490:        if (options > 0) {
        !           491:                yp->full_duplex = (options & 16) ? 1 : 0;
        !           492:                yp->default_port = options & 15;
        !           493:                if (yp->default_port)
        !           494:                        yp->medialock = 1;
        !           495:        }
        !           496: 
        !           497:        /* The Yellowfin-specific entries in the device structure. */
        !           498:        dev->open = &yellowfin_open;
        !           499:        dev->hard_start_xmit = &yellowfin_start_xmit;
        !           500:        dev->stop = &yellowfin_close;
        !           501:        dev->get_stats = &yellowfin_get_stats;
        !           502:        dev->set_multicast_list = &set_rx_mode;
        !           503:        if (mtu)
        !           504:                dev->mtu = mtu;
        !           505: 
        !           506:        /* todo: Reset the xcvr interface and turn on heartbeat. */
        !           507: 
        !           508:        return dev;
        !           509: }
        !           510: 
        !           511: 
        !           512: static int
        !           513: yellowfin_open(struct device *dev)
        !           514: {
        !           515:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           516:        int ioaddr = dev->base_addr;
        !           517: 
        !           518:        /* Reset the chip. */
        !           519:        outl(0x80000000, ioaddr + DMACtrl);
        !           520: 
        !           521: #ifdef SA_SHIRQ
        !           522:        if (request_irq(dev->irq, &yellowfin_interrupt, SA_SHIRQ,
        !           523:                                        card_name, dev)) {
        !           524:                return -EAGAIN;
        !           525:        }
        !           526: #else
        !           527:        if (irq2dev_map[dev->irq] != NULL
        !           528:                || (irq2dev_map[dev->irq] = dev) == NULL
        !           529:                || dev->irq == 0
        !           530:                || request_irq(dev->irq, &yellowfin_interrupt, 0, card_name)) {
        !           531:                return -EAGAIN;
        !           532:        }
        !           533: #endif
        !           534: 
        !           535:        if (yellowfin_debug > 1)
        !           536:                printk("%s: yellowfin_open() irq %d.\n", dev->name, dev->irq);
        !           537: 
        !           538:        MOD_INC_USE_COUNT;
        !           539: 
        !           540:        yellowfin_init_ring(dev);
        !           541: 
        !           542:        outl(virt_to_bus(yp->rx_ring), ioaddr + RxPtr);
        !           543:        outl(virt_to_bus(yp->tx_ring), ioaddr + TxPtr);
        !           544: 
        !           545:        /* Set up various condition 'select' registers.
        !           546:           There are no options here. */
        !           547:        outl(0x00800080, ioaddr + TxIntrSel);   /* Interrupt on Tx abort */
        !           548:        outl(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */
        !           549:        outl(0x00400040, ioaddr + TxWaitSel);   /* Wait on Tx status */
        !           550:        outl(0x00400040, ioaddr + RxIntrSel);   /* Interrupt on Rx done */
        !           551:        outl(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */
        !           552:        outl(0x00400040, ioaddr + RxWaitSel);   /* Wait on Rx done */
        !           553: 
        !           554:        /* Initialize other registers: with so many this eventually this will
        !           555:           converted to an offset/value list. */
        !           556:        outl(dma_ctrl, ioaddr + DMACtrl);
        !           557:        outw(fifo_cfg, ioaddr + FIFOcfg);
        !           558:        /* Enable automatic generation of flow control frames, period 0xffff. */
        !           559:        outl(0x0030FFFF, ioaddr + FlowCtrl);
        !           560: 
        !           561:        if (dev->if_port == 0)
        !           562:                dev->if_port = yp->default_port;
        !           563: 
        !           564:        dev->tbusy = 0;
        !           565:        dev->interrupt = 0;
        !           566:        yp->in_interrupt = 0;
        !           567: 
        !           568:        /* We are always in full-duplex mode with the current chip! */
        !           569:        yp->full_duplex = 1;
        !           570: 
        !           571:        /* Setting the Rx mode will start the Rx process. */
        !           572:        outw(0x01CD | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);
        !           573: #ifdef NEW_MULTICAST
        !           574:        set_rx_mode(dev);
        !           575: #else
        !           576:        set_rx_mode(dev, 0, 0);
        !           577: #endif
        !           578: 
        !           579:        dev->start = 1;
        !           580: 
        !           581:        /* Enable interrupts by setting the interrupt mask. */
        !           582:        outw(0x81ff, ioaddr + IntrEnb);                 /* See enum intr_status_bits */
        !           583:        outw(0x0000, ioaddr + EventStatus);             /* Clear non-interrupting events */
        !           584:        outl(0x80008000, ioaddr + RxCtrl);              /* Start Rx and Tx channels. */
        !           585:        outl(0x80008000, ioaddr + TxCtrl);
        !           586: 
        !           587:        if (yellowfin_debug > 2) {
        !           588:                printk("%s: Done yellowfin_open().\n",
        !           589:                           dev->name);
        !           590:        }
        !           591:        /* Set the timer to check for link beat. */
        !           592:        init_timer(&yp->timer);
        !           593:        yp->timer.expires = RUN_AT((24*HZ)/10);                 /* 2.4 sec. */
        !           594:        yp->timer.data = (unsigned long)dev;
        !           595:        yp->timer.function = &yellowfin_timer;                          /* timer handler */
        !           596:        add_timer(&yp->timer);
        !           597: 
        !           598:        return 0;
        !           599: }
        !           600: 
        !           601: static void yellowfin_timer(unsigned long data)
        !           602: {
        !           603:        struct device *dev = (struct device *)data;
        !           604:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           605:        int ioaddr = dev->base_addr;
        !           606:        int next_tick = 0;
        !           607: 
        !           608:        if (yellowfin_debug > 3) {
        !           609:                printk("%s: Yellowfin timer tick, status %8.8x.\n",
        !           610:                           dev->name, inl(ioaddr + IntrStatus));
        !           611:        }
        !           612:        if (next_tick) {
        !           613:                yp->timer.expires = RUN_AT(next_tick);
        !           614:                add_timer(&yp->timer);
        !           615:        }
        !           616: }
        !           617: 
        !           618: static void yellowfin_tx_timeout(struct device *dev)
        !           619: {
        !           620:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           621:        int ioaddr = dev->base_addr;
        !           622: 
        !           623:        printk("%s: Yellowfin transmit timed out, status %8.8x, resetting...\n",
        !           624:                   dev->name, inl(ioaddr));
        !           625: 
        !           626: #ifndef __alpha__
        !           627:        {
        !           628:                int i;
        !           629:                printk("  Rx ring %8.8x: ", (int)yp->rx_ring);
        !           630:                for (i = 0; i < RX_RING_SIZE; i++)
        !           631:                        printk(" %8.8x", (unsigned int)yp->rx_ring[i].status);
        !           632:                printk("\n  Tx ring %8.8x: ", (int)yp->tx_ring);
        !           633:                for (i = 0; i < TX_RING_SIZE; i++)
        !           634:                        printk(" %4.4x /%4.4x", yp->tx_status[i].tx_errs, yp->tx_ring[i].status);
        !           635:                printk("\n");
        !           636:        }
        !           637: #endif
        !           638: 
        !           639:   /* Perhaps we should reinitialize the hardware here. */
        !           640:   dev->if_port = 0;
        !           641:   /* Stop and restart the chip's Tx processes . */
        !           642: 
        !           643:   /* Trigger an immediate transmit demand. */
        !           644: 
        !           645:   dev->trans_start = jiffies;
        !           646:   yp->stats.tx_errors++;
        !           647:   return;
        !           648: }
        !           649: 
        !           650: 
        !           651: /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
        !           652: static void
        !           653: yellowfin_init_ring(struct device *dev)
        !           654: {
        !           655:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           656:        int i;
        !           657: 
        !           658:        yp->tx_full = 0;
        !           659:        yp->cur_rx = yp->cur_tx = 0;
        !           660:        yp->dirty_rx = yp->dirty_tx = 0;
        !           661: 
        !           662:        for (i = 0; i < RX_RING_SIZE; i++) {
        !           663:                struct sk_buff *skb;
        !           664:                int pkt_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
        !           665: 
        !           666:                yp->rx_ring[i].request_cnt = pkt_buf_sz;
        !           667:                yp->rx_ring[i].cmd = CMD_RX_BUF | INTR_ALWAYS;
        !           668: 
        !           669:                skb = DEV_ALLOC_SKB(pkt_buf_sz);
        !           670:                skb_reserve(skb, 2);    /* 16 byte align the IP header. */
        !           671:                yp->rx_skbuff[i] = skb;
        !           672:                if (skb == NULL)
        !           673:                        break;                  /* Bad news!  */
        !           674:                skb->dev = dev;                 /* Mark as being used by this device. */
        !           675: #if LINUX_VERSION_CODE > 0x10300
        !           676:                yp->rx_ring[i].addr = virt_to_bus(skb->tail);
        !           677: #else
        !           678:                yp->rx_ring[i].addr = virt_to_bus(skb->data);
        !           679: #endif
        !           680:                yp->rx_ring[i].branch_addr = virt_to_bus(&yp->rx_ring[i+1]);
        !           681:        }
        !           682:        /* Mark the last entry as wrapping the ring. */
        !           683:        yp->rx_ring[i-1].cmd = CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS;
        !           684:        yp->rx_ring[i-1].branch_addr = virt_to_bus(&yp->rx_ring[0]);
        !           685: 
        !           686: /*#define NO_TXSTATS*/
        !           687: #ifdef NO_TXSTATS
        !           688:        /* In this mode the Tx ring needs only a single descriptor. */
        !           689:        for (i = 0; i < TX_RING_SIZE; i++) {
        !           690:                yp->tx_skbuff[i] = 0;
        !           691:                yp->tx_ring[i].cmd = CMD_STOP;
        !           692:                yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
        !           693:        }
        !           694:        yp->tx_ring[--i].cmd = CMD_STOP | BRANCH_ALWAYS; /* Wrap ring */
        !           695:        yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[0]);
        !           696: #else
        !           697:        /* Tx ring needs a pair of descriptors, the second for the status. */
        !           698:        for (i = 0; i < TX_RING_SIZE*2; i++) {
        !           699:                yp->tx_skbuff[i/2] = 0;
        !           700:                yp->tx_ring[i].cmd = CMD_STOP; /* Branch on Tx error. */
        !           701:                yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
        !           702:                i++;
        !           703:                yp->tx_ring[i].cmd = CMD_TXSTATUS; /* Interrupt, no wait. */
        !           704:                yp->tx_ring[i].request_cnt = sizeof(yp->tx_status[i]);
        !           705:                yp->tx_ring[i].addr = virt_to_bus(&yp->tx_status[i/2]);
        !           706:                yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
        !           707:        }
        !           708:        /* Wrap ring */
        !           709:        yp->tx_ring[--i].cmd = CMD_TXSTATUS | BRANCH_ALWAYS | INTR_ALWAYS;
        !           710:        yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[0]);
        !           711: #endif
        !           712: }
        !           713: 
        !           714: static int
        !           715: yellowfin_start_xmit(struct sk_buff *skb, struct device *dev)
        !           716: {
        !           717:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           718:        unsigned entry;
        !           719: 
        !           720:        /* Block a timer-based transmit from overlapping.  This could better be
        !           721:           done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
        !           722:        if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) {
        !           723:                if (jiffies - dev->trans_start < TX_TIMEOUT)
        !           724:                        return 1;
        !           725:                yellowfin_tx_timeout(dev);
        !           726:                return 1;
        !           727:        }
        !           728: 
        !           729:        /* Caution: the write order is important here, set the base address
        !           730:           with the "ownership" bits last. */
        !           731: 
        !           732:        /* Calculate the next Tx descriptor entry. */
        !           733:        entry = yp->cur_tx % TX_RING_SIZE;
        !           734: 
        !           735:        yp->tx_skbuff[entry] = skb;
        !           736: 
        !           737: #ifdef NO_TXSTATS
        !           738:        yp->tx_ring[entry].request_cnt = skb->len;
        !           739:        yp->tx_ring[entry].addr = virt_to_bus(skb->data);
        !           740:        yp->tx_ring[entry].status = 0;
        !           741:        if (entry >= TX_RING_SIZE-1) {
        !           742:                yp->tx_ring[0].cmd = CMD_STOP; /* New stop command. */
        !           743:                yp->tx_ring[TX_RING_SIZE-1].cmd = CMD_TX_PKT | BRANCH_ALWAYS;
        !           744:        } else {
        !           745:                yp->tx_ring[entry+1].cmd = CMD_STOP; /* New stop command. */
        !           746:                yp->tx_ring[entry].cmd = CMD_TX_PKT | BRANCH_IFTRUE;
        !           747:        }
        !           748:        yp->cur_tx++;
        !           749: #else
        !           750:        yp->tx_ring[entry<<1].request_cnt = skb->len;
        !           751:        yp->tx_ring[entry<<1].addr = virt_to_bus(skb->data);
        !           752:        /* The input_last (status-write) command is constant, but we must rewrite
        !           753:           the subsequent 'stop' command. */
        !           754: 
        !           755:        yp->cur_tx++;
        !           756:        {
        !           757:                unsigned next_entry = yp->cur_tx % TX_RING_SIZE;
        !           758:                yp->tx_ring[next_entry<<1].cmd = CMD_STOP;
        !           759:        }
        !           760:        /* Final step -- overwrite the old 'stop' command. */
        !           761: 
        !           762:        yp->tx_ring[entry<<1].cmd =
        !           763:                (entry % 6) == 0 ? CMD_TX_PKT | INTR_ALWAYS | BRANCH_IFTRUE :
        !           764:                CMD_TX_PKT | BRANCH_IFTRUE;
        !           765: #endif
        !           766: 
        !           767:        /* Todo: explicitly flush cache lines here. */
        !           768: 
        !           769:        /* Wake the potentially-idle transmit channel. */
        !           770:        outl(0x10001000, dev->base_addr + TxCtrl);
        !           771: 
        !           772:        if (yp->cur_tx - yp->dirty_tx < TX_RING_SIZE - 1)
        !           773:                clear_bit(0, (void*)&dev->tbusy);               /* Typical path */
        !           774:        else
        !           775:                yp->tx_full = 1;
        !           776:        dev->trans_start = jiffies;
        !           777: 
        !           778:        if (yellowfin_debug > 4) {
        !           779:                printk("%s: Yellowfin transmit frame #%d queued in slot %d.\n",
        !           780:                           dev->name, yp->cur_tx, entry);
        !           781:        }
        !           782:        return 0;
        !           783: }
        !           784: 
        !           785: /* The interrupt handler does all of the Rx thread work and cleans up
        !           786:    after the Tx thread. */
        !           787: static void yellowfin_interrupt IRQ(int irq, void *dev_instance, struct pt_regs *regs)
        !           788: {
        !           789: #ifdef SA_SHIRQ                /* Use the now-standard shared IRQ implementation. */
        !           790:        struct device *dev = (struct device *)dev_instance;
        !           791: #else
        !           792:        struct device *dev = (struct device *)(irq2dev_map[irq]);
        !           793: #endif
        !           794: 
        !           795:        struct yellowfin_private *lp;
        !           796:        int ioaddr, boguscnt = max_interrupt_work;
        !           797: 
        !           798:        if (dev == NULL) {
        !           799:                printk ("yellowfin_interrupt(): irq %d for unknown device.\n", irq);
        !           800:                return;
        !           801:        }
        !           802: 
        !           803:        ioaddr = dev->base_addr;
        !           804:        lp = (struct yellowfin_private *)dev->priv;
        !           805:        if (test_and_set_bit(0, (void*)&lp->in_interrupt)) {
        !           806:                dev->interrupt = 1;
        !           807:                printk(KERN_ERR "%s: Re-entering the interrupt handler.\n", dev->name);
        !           808:                return;
        !           809:        }
        !           810: 
        !           811:        do {
        !           812:                u16 intr_status = inw(ioaddr + IntrClear);
        !           813:                unsigned dirty_tx = lp->dirty_tx;
        !           814: 
        !           815:                if (yellowfin_debug > 4)
        !           816:                        printk("%s: Yellowfin interrupt, status %4.4x.\n",
        !           817:                                   dev->name, intr_status);
        !           818: 
        !           819:                if (intr_status == 0)
        !           820:                        break;
        !           821: 
        !           822:                if (intr_status & (IntrRxDone | IntrEarlyRx))
        !           823:                        yellowfin_rx(dev);
        !           824: 
        !           825: #ifdef NO_TXSTATS
        !           826:                for (; lp->cur_tx - dirty_tx > 0; dirty_tx++) {
        !           827:                        int entry = dirty_tx % TX_RING_SIZE;
        !           828:                        if (lp->tx_ring[entry].status == 0)
        !           829:                                break;
        !           830:                        /* Free the original skb. */
        !           831:                        dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE);
        !           832:                        lp->tx_skbuff[entry] = 0;
        !           833:                        lp->stats.tx_packets++;
        !           834:                }
        !           835:                if (lp->tx_full && dev->tbusy
        !           836:                        && lp->cur_tx - dirty_tx < TX_RING_SIZE - 4) {
        !           837:                        /* The ring is no longer full, clear tbusy. */
        !           838:                        lp->tx_full = 0;
        !           839:                        clear_bit(0, (void*)&dev->tbusy);
        !           840:                        mark_bh(NET_BH);
        !           841:                }
        !           842:                lp->dirty_tx = dirty_tx;
        !           843: #else
        !           844:                if (intr_status & IntrTxDone
        !           845:                        || lp->tx_status[dirty_tx % TX_RING_SIZE].tx_errs) {
        !           846: 
        !           847:                        for (dirty_tx = lp->dirty_tx; lp->cur_tx - dirty_tx > 0;
        !           848:                                 dirty_tx++) {
        !           849:                                /* Todo: optimize this. */
        !           850:                                int entry = dirty_tx % TX_RING_SIZE;
        !           851:                                u16 tx_errs = lp->tx_status[entry].tx_errs;
        !           852: 
        !           853:                                if (tx_errs == 0)
        !           854:                                        break;                  /* It still hasn't been Txed */
        !           855:                                if (tx_errs & 0xF8100000) {
        !           856:                                        /* There was an major error, log it. */
        !           857: #ifndef final_version
        !           858:                                        if (yellowfin_debug > 1)
        !           859:                                                printk("%s: Transmit error, Tx status %4.4x.\n",
        !           860:                                                           dev->name, tx_errs);
        !           861: #endif
        !           862:                                        lp->stats.tx_errors++;
        !           863:                                        if (tx_errs & 0xF800) lp->stats.tx_aborted_errors++;
        !           864:                                        if (tx_errs & 0x0800) lp->stats.tx_carrier_errors++;
        !           865:                                        if (tx_errs & 0x2000) lp->stats.tx_window_errors++;
        !           866:                                        if (tx_errs & 0x8000) lp->stats.tx_fifo_errors++;
        !           867: #ifdef ETHER_STATS
        !           868:                                        if (tx_errs & 0x1000) lp->stats.collisions16++;
        !           869: #endif
        !           870:                                } else {
        !           871: #ifdef ETHER_STATS
        !           872:                                        if (status & 0x0400) lp->stats.tx_deferred++;
        !           873: #endif
        !           874:                                        lp->stats.collisions += tx_errs & 15;
        !           875:                                        lp->stats.tx_packets++;
        !           876:                                }
        !           877: 
        !           878:                                /* Free the original skb. */
        !           879:                                dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE);
        !           880:                                lp->tx_skbuff[entry] = 0;
        !           881:                                /* Mark status as empty. */
        !           882:                                lp->tx_status[entry].tx_errs = 0;
        !           883:                        }
        !           884: 
        !           885: #ifndef final_version
        !           886:                        if (lp->cur_tx - dirty_tx > TX_RING_SIZE) {
        !           887:                                printk("%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
        !           888:                                           dev->name, dirty_tx, lp->cur_tx, lp->tx_full);
        !           889:                                dirty_tx += TX_RING_SIZE;
        !           890:                        }
        !           891: #endif
        !           892: 
        !           893:                        if (lp->tx_full && dev->tbusy
        !           894:                                && lp->cur_tx - dirty_tx < TX_RING_SIZE - 2) {
        !           895:                                /* The ring is no longer full, clear tbusy. */
        !           896:                                lp->tx_full = 0;
        !           897:                                clear_bit(0, (void*)&dev->tbusy);
        !           898:                                mark_bh(NET_BH);
        !           899:                        }
        !           900: 
        !           901:                        lp->dirty_tx = dirty_tx;
        !           902:                }
        !           903: #endif
        !           904: 
        !           905:                /* Log errors and other events. */
        !           906:                if (intr_status & 0x2ee) {      /* Abnormal error summary. */
        !           907:                        printk("%s: Something Wicked happened! %4.4x.\n",
        !           908:                                   dev->name, intr_status);
        !           909:                        /* Hmmmmm, it's not clear what to do here. */
        !           910:                        if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
        !           911:                                lp->stats.tx_errors++;
        !           912:                        if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
        !           913:                                lp->stats.rx_errors++;
        !           914:                }
        !           915:                if (--boguscnt < 0) {
        !           916:                        printk("%s: Too much work at interrupt, status=0x%4.4x.\n",
        !           917:                                   dev->name, intr_status);
        !           918:                        break;
        !           919:                }
        !           920:        } while (1);
        !           921: 
        !           922:        if (yellowfin_debug > 3)
        !           923:                printk("%s: exiting interrupt, status=%#4.4x.\n",
        !           924:                           dev->name, inw(ioaddr + IntrStatus));
        !           925: 
        !           926:        /* Code that should never be run!  Perhaps remove after testing.. */
        !           927:        {
        !           928:                static int stopit = 10;
        !           929:                if (dev->start == 0  &&  --stopit < 0) {
        !           930:                        printk("%s: Emergency stop, looping startup interrupt.\n",
        !           931:                                   dev->name);
        !           932: #ifdef SA_SHIRQ
        !           933:                        free_irq(irq, dev);
        !           934: #else
        !           935:                        free_irq(irq);
        !           936: #endif
        !           937:                }
        !           938:        }
        !           939: 
        !           940:        dev->interrupt = 0;
        !           941:        clear_bit(0, (void*)&lp->in_interrupt);
        !           942:        return;
        !           943: }
        !           944: 
        !           945: /* This routine is logically part of the interrupt handler, but separated
        !           946:    for clarity and better register allocation. */
        !           947: static int
        !           948: yellowfin_rx(struct device *dev)
        !           949: {
        !           950:        struct yellowfin_private *lp = (struct yellowfin_private *)dev->priv;
        !           951:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !           952:        int entry = lp->cur_rx % RX_RING_SIZE;
        !           953:        int boguscnt = 20;
        !           954: 
        !           955:        if (yellowfin_debug > 4) {
        !           956:                printk(" In yellowfin_rx(), entry %d status %4.4x.\n", entry,
        !           957:                           yp->rx_ring[entry].status);
        !           958:                printk("   #%d desc. %4.4x %4.4x %8.8x %4.4x %4.4x.\n",
        !           959:                           entry, yp->rx_ring[entry].cmd,
        !           960:                           yp->rx_ring[entry].request_cnt, yp->rx_ring[entry].addr,
        !           961:                           yp->rx_ring[entry].result_cnt, yp->rx_ring[entry].status);
        !           962:        }
        !           963: 
        !           964: 
        !           965:        /* If EOP is set on the next entry, it's a new packet. Send it up. */
        !           966:        while (yp->rx_ring[entry].status) {
        !           967:                /* Todo: optimize this mess. */
        !           968:                u16 desc_status = yp->rx_ring[entry].status;
        !           969:                struct yellowfin_desc *desc = &lp->rx_ring[entry];
        !           970:                int frm_size = desc->request_cnt - desc->result_cnt;
        !           971:                u8 *buf_addr = bus_to_virt(lp->rx_ring[entry].addr);
        !           972:                s16 frame_status = *(s16*)&(buf_addr[frm_size - 2]);
        !           973: 
        !           974:                if (yellowfin_debug > 4)
        !           975:                        printk("  yellowfin_rx() status was %4.4x.\n", frame_status);
        !           976:                if (--boguscnt < 0)
        !           977:                        break;
        !           978:                if ( ! (desc_status & RX_EOP)) {
        !           979:                        printk("%s: Oversized Ethernet frame spanned multiple buffers,"
        !           980:                                   " status %4.4x!\n", dev->name, desc_status);
        !           981:                          lp->stats.rx_length_errors++;
        !           982:                } else if (frame_status & 0x0038) {
        !           983:                        /* There was a error. */
        !           984:                        if (yellowfin_debug > 3)
        !           985:                                printk("  yellowfin_rx() Rx error was %4.4x.\n", frame_status);
        !           986:                        lp->stats.rx_errors++;
        !           987:                        if (frame_status & 0x0060) lp->stats.rx_length_errors++;
        !           988:                        if (frame_status & 0x0008) lp->stats.rx_frame_errors++;
        !           989:                        if (frame_status & 0x0010) lp->stats.rx_crc_errors++;
        !           990:                        if (frame_status < 0) lp->stats.rx_dropped++;
        !           991: #ifdef YF_PROTOTYPE                    /* Support for prototype hardware errata. */
        !           992:                } else if (memcmp(bus_to_virt(lp->rx_ring[entry].addr),
        !           993:                                                  dev->dev_addr, 6) != 0
        !           994:                                   && memcmp(bus_to_virt(lp->rx_ring[entry].addr),
        !           995:                                                         "\377\377\377\377\377\377", 6) != 0) {
        !           996:                        printk("%s: Bad frame to %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
        !           997:                                   dev->name,
        !           998:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[0],
        !           999:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[1],
        !          1000:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[2],
        !          1001:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[3],
        !          1002:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[4],
        !          1003:                                   ((char *)bus_to_virt(lp->rx_ring[entry].addr))[5]);
        !          1004:                        bogus_rx++;
        !          1005: #endif
        !          1006:                } else {
        !          1007:                        u8 bogus_cnt = buf_addr[frm_size - 8];
        !          1008:                        int pkt_len = frm_size - 8 - bogus_cnt;
        !          1009:                        struct sk_buff *skb;
        !          1010:                        int rx_in_place = 0;
        !          1011: 
        !          1012:                        /* Check if the packet is long enough to just accept without
        !          1013:                           copying to a properly sized skbuff. */
        !          1014:                        if (pkt_len > rx_copybreak) {
        !          1015:                                struct sk_buff *newskb;
        !          1016:                                char *temp;
        !          1017: 
        !          1018:                                /* Get a fresh skbuff to replace the filled one. */
        !          1019:                                newskb = DEV_ALLOC_SKB(dev->mtu <= 1500 ? PKT_BUF_SZ
        !          1020:                                                                           : dev->mtu + 32);
        !          1021:                                if (newskb == NULL) {
        !          1022:                                        skb = 0;                /* No memory, drop the packet. */
        !          1023:                                        goto memory_squeeze;
        !          1024:                                }
        !          1025:                                /* Pass up the skb already on the Rx ring. */
        !          1026:                                skb = lp->rx_skbuff[entry];
        !          1027:                                temp = skb_put(skb, pkt_len);
        !          1028:                                if (bus_to_virt(lp->rx_ring[entry].addr) != temp)
        !          1029:                                        printk("%s: Warning -- the skbuff addresses do not match"
        !          1030:                                                   " in yellowfin_rx: %p vs. %p / %p.\n", dev->name,
        !          1031:                                                   bus_to_virt(lp->rx_ring[entry].addr),
        !          1032:                                                   skb->head, temp);
        !          1033:                                rx_in_place = 1;
        !          1034:                                lp->rx_skbuff[entry] = newskb;
        !          1035:                                newskb->dev = dev;
        !          1036:                                skb_reserve(newskb, 2); /* 16 byte align IP header */
        !          1037:                                lp->rx_ring[entry].addr = virt_to_bus(newskb->tail);
        !          1038:                        } else
        !          1039:                                skb = DEV_ALLOC_SKB(pkt_len + 2);
        !          1040:                        memory_squeeze:
        !          1041:                        if (skb == NULL) {
        !          1042:                                printk("%s: Memory squeeze, deferring packet.\n", dev->name);
        !          1043:                                /* todo: Check that at least two ring entries are free.
        !          1044:                                   If not, free one and mark stats->rx_dropped++. */
        !          1045:                                break;
        !          1046:                        }
        !          1047:                        skb->dev = dev;
        !          1048:                        if (! rx_in_place) {
        !          1049:                                skb_reserve(skb, 2);    /* 16 byte align the data fields */
        !          1050:                                memcpy(skb_put(skb, pkt_len),
        !          1051:                                           bus_to_virt(lp->rx_ring[entry].addr), pkt_len);
        !          1052:                        }
        !          1053: #if LINUX_VERSION_CODE > 0x10300
        !          1054:                        skb->protocol = eth_type_trans(skb, dev);
        !          1055: #else
        !          1056:                        skb->len = pkt_len;
        !          1057: #endif
        !          1058:                        netif_rx(skb);
        !          1059:                        lp->stats.rx_packets++;
        !          1060:                }
        !          1061: 
        !          1062:                /* Mark this entry as being the end-of-list, and the prior entry
        !          1063:                   as now valid. */
        !          1064:                lp->rx_ring[entry].cmd = CMD_STOP;
        !          1065:                yp->rx_ring[entry].status = 0;
        !          1066:                {
        !          1067:                        int prev_entry = entry - 1;
        !          1068:                        if (prev_entry < 0)
        !          1069:                                lp->rx_ring[RX_RING_SIZE - 1].cmd =
        !          1070:                                        CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS;
        !          1071:                        else
        !          1072:                                lp->rx_ring[prev_entry].cmd = CMD_RX_BUF | INTR_ALWAYS;
        !          1073:                }
        !          1074:                entry = (++lp->cur_rx) % RX_RING_SIZE;
        !          1075:        }
        !          1076:        /* todo: restart Rx engine if stopped.  For now we just make the Rx ring
        !          1077:           large enough to avoid this. */
        !          1078: 
        !          1079:        return 0;
        !          1080: }
        !          1081: 
        !          1082: static int
        !          1083: yellowfin_close(struct device *dev)
        !          1084: {
        !          1085:        int ioaddr = dev->base_addr;
        !          1086:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !          1087:        int i;
        !          1088: 
        !          1089:        dev->start = 0;
        !          1090:        dev->tbusy = 1;
        !          1091: 
        !          1092:        if (yellowfin_debug > 1) {
        !          1093:                printk("%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
        !          1094:                           dev->name, inw(ioaddr + TxStatus),
        !          1095:                           inw(ioaddr + RxStatus), inl(ioaddr + IntrStatus));
        !          1096:                printk("%s: Queue pointers were Tx %d / %d,  Rx %d / %d.\n",
        !          1097:                           dev->name, yp->cur_tx, yp->dirty_tx, yp->cur_rx, yp->dirty_rx);
        !          1098:        }
        !          1099: 
        !          1100:        /* Disable interrupts by clearing the interrupt mask. */
        !          1101:        outw(0x0000, ioaddr + IntrEnb);
        !          1102: 
        !          1103:        /* Stop the chip's Tx and Rx processes. */
        !          1104:        outl(0x80000000, ioaddr + RxCtrl);
        !          1105:        outl(0x80000000, ioaddr + TxCtrl);
        !          1106: 
        !          1107:        del_timer(&yp->timer);
        !          1108: 
        !          1109: #ifdef __i386__
        !          1110:        if (yellowfin_debug > 2) {
        !          1111:                printk("\n  Tx ring at %8.8x:\n", (int)virt_to_bus(yp->tx_ring));
        !          1112:                for (i = 0; i < TX_RING_SIZE*2; i++)
        !          1113:                        printk(" %c #%d desc. %4.4x %4.4x %8.8x %8.8x %4.4x %4.4x.\n",
        !          1114:                                   inl(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ',
        !          1115:                                   i, yp->tx_ring[i].cmd,
        !          1116:                                   yp->tx_ring[i].request_cnt, yp->tx_ring[i].addr,
        !          1117:                                   yp->tx_ring[i].branch_addr,
        !          1118:                                   yp->tx_ring[i].result_cnt, yp->tx_ring[i].status);
        !          1119:                printk("  Tx status %p:\n", yp->tx_status);
        !          1120:                for (i = 0; i < TX_RING_SIZE; i++)
        !          1121:                        printk("   #%d status %4.4x %4.4x %4.4x %4.4x.\n",
        !          1122:                                   i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs,
        !          1123:                                   yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused);
        !          1124: 
        !          1125:                printk("\n  Rx ring %8.8x:\n", (int)virt_to_bus(yp->rx_ring));
        !          1126:                for (i = 0; i < RX_RING_SIZE; i++) {
        !          1127:                        printk(" %c #%d desc. %4.4x %4.4x %8.8x %4.4x %4.4x\n",
        !          1128:                                   inl(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ',
        !          1129:                                   i, yp->rx_ring[i].cmd,
        !          1130:                                   yp->rx_ring[i].request_cnt, yp->rx_ring[i].addr,
        !          1131:                                   yp->rx_ring[i].result_cnt, yp->rx_ring[i].status);
        !          1132:                        if (yellowfin_debug > 5) {
        !          1133:                                if (*(u8*)yp->rx_ring[i].addr != 0x69) {
        !          1134:                                        int j;
        !          1135:                                        for (j = 0; j < 0x50; j++)
        !          1136:                                                printk(" %4.4x", ((u16*)yp->rx_ring[i].addr)[j]);
        !          1137:                                        printk("\n");
        !          1138:                                }
        !          1139:                        }
        !          1140:                }
        !          1141:        }
        !          1142: #endif /* __i386__ debugging only */
        !          1143: 
        !          1144: #ifdef SA_SHIRQ
        !          1145:        free_irq(dev->irq, dev);
        !          1146: #else
        !          1147:        free_irq(dev->irq);
        !          1148:        irq2dev_map[dev->irq] = 0;
        !          1149: #endif
        !          1150: 
        !          1151:        /* Free all the skbuffs in the Rx queue. */
        !          1152:        for (i = 0; i < RX_RING_SIZE; i++) {
        !          1153:                yp->rx_ring[i].cmd = CMD_STOP;
        !          1154:                yp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
        !          1155:                if (yp->rx_skbuff[i]) {
        !          1156: #if LINUX_VERSION_CODE < 0x20100
        !          1157:                        yp->rx_skbuff[i]->free = 1;
        !          1158: #endif
        !          1159:                        dev_kfree_skb(yp->rx_skbuff[i], FREE_WRITE);
        !          1160:                }
        !          1161:                yp->rx_skbuff[i] = 0;
        !          1162:        }
        !          1163:        for (i = 0; i < TX_RING_SIZE; i++) {
        !          1164:                if (yp->tx_skbuff[i])
        !          1165:                        dev_kfree_skb(yp->tx_skbuff[i], FREE_WRITE);
        !          1166:                yp->tx_skbuff[i] = 0;
        !          1167:        }
        !          1168: 
        !          1169: #ifdef YF_PROTOTYPE                    /* Support for prototype hardware errata. */
        !          1170:        if (yellowfin_debug > 0) {
        !          1171:                printk("%s: Received %d frames that we should not have.\n",
        !          1172:                           dev->name, bogus_rx);
        !          1173:        }
        !          1174: #endif
        !          1175:        MOD_DEC_USE_COUNT;
        !          1176: 
        !          1177:        return 0;
        !          1178: }
        !          1179: 
        !          1180: static struct enet_statistics *
        !          1181: yellowfin_get_stats(struct device *dev)
        !          1182: {
        !          1183:        struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
        !          1184:        return &yp->stats;
        !          1185: }
        !          1186: 
        !          1187: /* Set or clear the multicast filter for this adaptor. */
        !          1188: 
        !          1189: /* The little-endian AUTODIN32 ethernet CRC calculation.
        !          1190:    N.B. Do not use for bulk data, use a table-based routine instead.
        !          1191:    This is common code and should be moved to net/core/crc.c */
        !          1192: static unsigned const ethernet_polynomial_le = 0xedb88320U;
        !          1193: static inline unsigned ether_crc_le(int length, unsigned char *data)
        !          1194: {
        !          1195:        unsigned int crc = 0xffffffff;  /* Initial value. */
        !          1196:        while(--length >= 0) {
        !          1197:                unsigned char current_octet = *data++;
        !          1198:                int bit;
        !          1199:                for (bit = 8; --bit >= 0; current_octet >>= 1) {
        !          1200:                        if ((crc ^ current_octet) & 1) {
        !          1201:                                crc >>= 1;
        !          1202:                                crc ^= ethernet_polynomial_le;
        !          1203:                        } else
        !          1204:                                crc >>= 1;
        !          1205:                }
        !          1206:        }
        !          1207:        return crc;
        !          1208: }
        !          1209: 
        !          1210: 
        !          1211: #ifdef NEW_MULTICAST
        !          1212: static void set_rx_mode(struct device *dev)
        !          1213: #else
        !          1214: static void set_rx_mode(struct device *dev, int num_addrs, void *addrs);
        !          1215: #endif
        !          1216: {
        !          1217:        int ioaddr = dev->base_addr;
        !          1218:        u16 cfg_value = inw(ioaddr + Cnfg);
        !          1219: 
        !          1220:        /* Stop the Rx process to change any value. */
        !          1221:        outw(cfg_value & ~0x1000, ioaddr + Cnfg);
        !          1222:        if (dev->flags & IFF_PROMISC) {                 /* Set promiscuous. */
        !          1223:                /* Unconditionally log net taps. */
        !          1224:                printk("%s: Promiscuous mode enabled.\n", dev->name);
        !          1225:                outw(0x000F, ioaddr + AddrMode);
        !          1226:        } else if ((dev->mc_count > 64)  ||  (dev->flags & IFF_ALLMULTI)) {
        !          1227:                /* Too many to filter well, or accept all multicasts. */
        !          1228:                outw(0x000B, ioaddr + AddrMode);
        !          1229:        } else if (dev->mc_count > 0) { /* Must use the multicast hash table. */
        !          1230:                struct dev_mc_list *mclist;
        !          1231:                u16 hash_table[4];
        !          1232:                int i;
        !          1233:                memset(hash_table, 0, sizeof(hash_table));
        !          1234:                for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
        !          1235:                         i++, mclist = mclist->next) {
        !          1236:                        /* Due to a bug in the early chip versions, multiple filter
        !          1237:                           slots must be set for each address. */
        !          1238:                        set_bit((ether_crc_le(3, mclist->dmi_addr) >> 3) & 0x3f,
        !          1239:                                        hash_table);
        !          1240:                        set_bit((ether_crc_le(4, mclist->dmi_addr) >> 3) & 0x3f,
        !          1241:                                        hash_table);
        !          1242:                        set_bit((ether_crc_le(5, mclist->dmi_addr) >> 3) & 0x3f,
        !          1243:                                        hash_table);
        !          1244:                        set_bit((ether_crc_le(6, mclist->dmi_addr) >> 3) & 0x3f,
        !          1245:                                        hash_table);
        !          1246:                }
        !          1247:                /* Copy the hash table to the chip. */
        !          1248:                for (i = 0; i < 4; i++)
        !          1249:                        outw(hash_table[i], ioaddr + HashTbl + i*2);
        !          1250:                outw(0x0003, ioaddr + AddrMode);
        !          1251:        } else {                                        /* Normal, unicast/broadcast-only mode. */
        !          1252:                outw(0x0001, ioaddr + AddrMode);
        !          1253:        }
        !          1254:        /* Restart the Rx process. */
        !          1255:        outw(cfg_value | 0x1000, ioaddr + Cnfg);
        !          1256: }
        !          1257: 
        !          1258: #ifdef MODULE
        !          1259: 
        !          1260: /* An additional parameter that may be passed in... */
        !          1261: static int debug = -1;
        !          1262: 
        !          1263: int
        !          1264: init_module(void)
        !          1265: {
        !          1266:        int cards_found;
        !          1267: 
        !          1268:        if (debug >= 0)
        !          1269:                yellowfin_debug = debug;
        !          1270: 
        !          1271:        root_yellowfin_dev = NULL;
        !          1272:        cards_found = yellowfin_probe(0);
        !          1273: 
        !          1274:        return cards_found ? 0 : -ENODEV;
        !          1275: }
        !          1276: 
        !          1277: void
        !          1278: cleanup_module(void)
        !          1279: {
        !          1280:        struct device *next_dev;
        !          1281: 
        !          1282:        /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
        !          1283:        while (root_yellowfin_dev) {
        !          1284:                next_dev = ((struct yellowfin_private *)root_yellowfin_dev->priv)->next_module;
        !          1285:                unregister_netdev(root_yellowfin_dev);
        !          1286:                release_region(root_yellowfin_dev->base_addr, YELLOWFIN_TOTAL_SIZE);
        !          1287:                kfree(root_yellowfin_dev);
        !          1288:                root_yellowfin_dev = next_dev;
        !          1289:        }
        !          1290: }
        !          1291: 
        !          1292: #endif  /* MODULE */
        !          1293: 
        !          1294: /*
        !          1295:  * Local variables:
        !          1296:  *  compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c yellowfin.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
        !          1297:  *  SMP-compile-command: "gcc -D__SMP__ -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c yellowfin.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
        !          1298:  *  c-indent-level: 4
        !          1299:  *  c-basic-offset: 4
        !          1300:  *  tab-width: 4
        !          1301:  * End:
        !          1302:  */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.