3c515.c
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- /* 3c515.c: A 3Com ISA EtherLink XL "Corkscrew" ethernet driver for linux. */
- /*
- Written 1997-1998 by Donald Becker.
- This software may be used and distributed according to the terms
- of the GNU General Public License, incorporated herein by reference.
- This driver is for the 3Com ISA EtherLink XL "Corkscrew" 3c515 ethercard.
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
- 2/2/00- Added support for kernel-level ISAPnP
- by Stephen Frost <sfrost@snowman.net> and Alessandro Zummo
- Cleaned up for 2.3.x/softnet by Jeff Garzik and Alan Cox.
-
- 11/17/2001 - Added ethtool support (jgarzik)
- */
- #define DRV_NAME "3c515"
- #define DRV_VERSION "0.99t"
- #define DRV_RELDATE "17-Nov-2001"
- static char *version =
- DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and othersn";
- #define CORKSCREW 1
- /* "Knobs" that adjust features and parameters. */
- /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
- Setting to > 1512 effectively disables this feature. */
- static const int rx_copybreak = 200;
- /* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
- static const int mtu = 1500;
- /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
- static int max_interrupt_work = 20;
- /* Enable the automatic media selection code -- usually set. */
- #define AUTOMEDIA 1
- /* Allow the use of fragment bus master transfers instead of only
- programmed-I/O for Vortex cards. Full-bus-master transfers are always
- enabled by default on Boomerang cards. If VORTEX_BUS_MASTER is defined,
- the feature may be turned on using 'options'. */
- #define VORTEX_BUS_MASTER
- /* A few values that may be tweaked. */
- /* Keep the ring sizes a power of two for efficiency. */
- #define TX_RING_SIZE 16
- #define RX_RING_SIZE 16
- #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
- #include <linux/config.h>
- #include <linux/module.h>
- #include <linux/version.h>
- #include <linux/isapnp.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/string.h>
- #include <linux/ptrace.h>
- #include <linux/errno.h>
- #include <linux/in.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/timer.h>
- #include <linux/ethtool.h>
- #include <asm/uaccess.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #define NEW_MULTICAST
- #include <linux/delay.h>
- /* Kernel version compatibility functions. */
- #define RUN_AT(x) (jiffies + (x))
- #define REQUEST_IRQ(i,h,f,n, instance) request_irq(i,h,f,n, instance)
- #define IRQ(irq, dev_id, pt_regs) (irq, dev_id, pt_regs)
- MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
- MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
- MODULE_LICENSE("GPL");
- MODULE_PARM(debug, "i");
- MODULE_PARM(options, "1-" __MODULE_STRING(8) "i");
- MODULE_PARM(rx_copybreak, "i");
- MODULE_PARM(max_interrupt_work, "i");
- MODULE_PARM_DESC(debug, "3c515 debug level (0-6)");
- MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering");
- MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames");
- MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt");
- /* "Knobs" for adjusting internal parameters. */
- /* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */
- #define DRIVER_DEBUG 1
- /* Some values here only for performance evaluation and path-coverage
- debugging. */
- static int rx_nocopy, rx_copy, queued_packet;
- /* Number of times to check to see if the Tx FIFO has space, used in some
- limited cases. */
- #define WAIT_TX_AVAIL 200
- /* Operational parameter that usually are not changed. */
- #define TX_TIMEOUT 40 /* Time in jiffies before concluding Tx hung */
- /* The size here is somewhat misleading: the Corkscrew also uses the ISA
- aliased registers at <base>+0x400.
- */
- #define CORKSCREW_TOTAL_SIZE 0x20
- #ifdef DRIVER_DEBUG
- static int corkscrew_debug = DRIVER_DEBUG;
- #else
- static int corkscrew_debug = 1;
- #endif
- #define CORKSCREW_ID 10
- /*
- Theory of Operation
- I. Board Compatibility
- This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL,
- 3Com's ISA bus adapter for Fast Ethernet. Due to the unique I/O port layout,
- it's not practical to integrate this driver with the other EtherLink drivers.
- II. Board-specific settings
- The Corkscrew has an EEPROM for configuration, but no special settings are
- needed for Linux.
- III. Driver operation
- The 3c515 series use an interface that's very similar to the 3c900 "Boomerang"
- PCI cards, with the bus master interface extensively modified to work with
- the ISA bus.
- The card is capable of full-bus-master transfers with separate
- lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
- DEC Tulip and Intel Speedo3.
- This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate
- receive buffer. This scheme allocates full-sized skbuffs as receive
- buffers. The value RX_COPYBREAK is used as the copying breakpoint: it is
- chosen to trade-off the memory wasted by passing the full-sized skbuff to
- the queue layer for all frames vs. the copying cost of copying a frame to a
- correctly-sized skbuff.
- IIIC. Synchronization
- The driver runs as two independent, single-threaded flows of control. One
- is the send-packet routine, which enforces single-threaded use by the netif
- layer. The other thread is the interrupt handler, which is single
- threaded by the hardware and other software.
- IV. Notes
- Thanks to Terry Murphy of 3Com for providing documentation and a development
- board.
- The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com
- project names. I use these names to eliminate confusion -- 3Com product
- numbers and names are very similar and often confused.
- The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes!
- This driver only supports ethernet frames because of the recent MTU limit
- of 1.5K, but the changes to support 4.5K are minimal.
- */
- /* Operational definitions.
- These are not used by other compilation units and thus are not
- exported in a ".h" file.
- First the windows. There are eight register windows, with the command
- and status registers available in each.
- */
- #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
- #define EL3_CMD 0x0e
- #define EL3_STATUS 0x0e
- /* The top five bits written to EL3_CMD are a command, the lower
- 11 bits are the parameter, if applicable.
- Note that 11 parameters bits was fine for ethernet, but the new chips
- can handle FDDI length frames (~4500 octets) and now parameters count
- 32-bit 'Dwords' rather than octets. */
- enum corkscrew_cmd {
- TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11,
- RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11,
- UpStall = 6 << 11, UpUnstall = (6 << 11) + 1,
- DownStall = (6 << 11) + 2, DownUnstall = (6 << 11) + 3,
- RxDiscard = 8 << 11, TxEnable = 9 << 11, TxDisable =
- 10 << 11, TxReset = 11 << 11,
- FakeIntr = 12 << 11, AckIntr = 13 << 11, SetIntrEnb = 14 << 11,
- SetStatusEnb = 15 << 11, SetRxFilter = 16 << 11, SetRxThreshold =
- 17 << 11,
- SetTxThreshold = 18 << 11, SetTxStart = 19 << 11,
- StartDMAUp = 20 << 11, StartDMADown = (20 << 11) + 1, StatsEnable =
- 21 << 11,
- StatsDisable = 22 << 11, StopCoax = 23 << 11,
- };
- /* The SetRxFilter command accepts the following classes: */
- enum RxFilter {
- RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
- };
- /* Bits in the general status register. */
- enum corkscrew_status {
- IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
- TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
- IntReq = 0x0040, StatsFull = 0x0080,
- DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10,
- DMAInProgress = 1 << 11, /* DMA controller is still busy. */
- CmdInProgress = 1 << 12, /* EL3_CMD is still busy. */
- };
- /* Register window 1 offsets, the window used in normal operation.
- On the Corkscrew this window is always mapped at offsets 0x10-0x1f. */
- enum Window1 {
- TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
- RxStatus = 0x18, Timer = 0x1A, TxStatus = 0x1B,
- TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
- };
- enum Window0 {
- Wn0IRQ = 0x08,
- #if defined(CORKSCREW)
- Wn0EepromCmd = 0x200A, /* Corkscrew EEPROM command register. */
- Wn0EepromData = 0x200C, /* Corkscrew EEPROM results register. */
- #else
- Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */
- Wn0EepromData = 12, /* Window 0: EEPROM results register. */
- #endif
- };
- enum Win0_EEPROM_bits {
- EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
- EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
- EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
- };
- /* EEPROM locations. */
- enum eeprom_offset {
- PhysAddr01 = 0, PhysAddr23 = 1, PhysAddr45 = 2, ModelID = 3,
- EtherLink3ID = 7,
- };
- enum Window3 { /* Window 3: MAC/config bits. */
- Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8,
- };
- union wn3_config {
- int i;
- struct w3_config_fields {
- unsigned int ram_size:3, ram_width:1, ram_speed:2,
- rom_size:2;
- int pad8:8;
- unsigned int ram_split:2, pad18:2, xcvr:3, pad21:1,
- autoselect:1;
- int pad24:7;
- } u;
- };
- enum Window4 {
- Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/media bits. */
- };
- enum Win4_Media_bits {
- Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */
- Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */
- Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */
- Media_LnkBeat = 0x0800,
- };
- enum Window7 { /* Window 7: Bus Master control. */
- Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
- };
- /* Boomerang-style bus master control registers. Note ISA aliases! */
- enum MasterCtrl {
- PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
- 0x40c,
- TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
- };
- /* The Rx and Tx descriptor lists.
- Caution Alpha hackers: these types are 32 bits! Note also the 8 byte
- alignment contraint on tx_ring[] and rx_ring[]. */
- struct boom_rx_desc {
- u32 next;
- s32 status;
- u32 addr;
- s32 length;
- };
- /* Values for the Rx status entry. */
- enum rx_desc_status {
- RxDComplete = 0x00008000, RxDError = 0x4000,
- /* See boomerang_rx() for actual error bits */
- };
- struct boom_tx_desc {
- u32 next;
- s32 status;
- u32 addr;
- s32 length;
- };
- struct corkscrew_private {
- const char *product_name;
- struct net_device *next_module;
- /* The Rx and Tx rings are here to keep them quad-word-aligned. */
- struct boom_rx_desc rx_ring[RX_RING_SIZE];
- struct boom_tx_desc tx_ring[TX_RING_SIZE];
- /* The addresses of transmit- and receive-in-place skbuffs. */
- struct sk_buff *rx_skbuff[RX_RING_SIZE];
- struct sk_buff *tx_skbuff[TX_RING_SIZE];
- unsigned int cur_rx, cur_tx; /* The next free ring entry */
- unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
- struct net_device_stats stats;
- struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */
- struct timer_list timer; /* Media selection timer. */
- int capabilities ; /* Adapter capabilities word. */
- int options; /* User-settable misc. driver options. */
- int last_rx_packets; /* For media autoselection. */
- unsigned int available_media:8, /* From Wn3_Options */
- media_override:3, /* Passed-in media type. */
- default_media:3, /* Read from the EEPROM. */
- full_duplex:1, autoselect:1, bus_master:1, /* Vortex can only do a fragment bus-m. */
- full_bus_master_tx:1, full_bus_master_rx:1, /* Boomerang */
- tx_full:1;
- };
- /* The action to take with a media selection timer tick.
- Note that we deviate from the 3Com order by checking 10base2 before AUI.
- */
- enum xcvr_types {
- XCVR_10baseT =
- 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
- XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8,
- };
- static struct media_table {
- char *name;
- unsigned int media_bits:16, /* Bits to set in Wn4_Media register. */
- mask:8, /* The transceiver-present bit in Wn3_Config. */
- next:8; /* The media type to try next. */
- short wait; /* Time before we check media status. */
- } media_tbl[] = {
- { "10baseT", Media_10TP, 0x08, XCVR_10base2, (14 * HZ) / 10 },
- { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10},
- { "undefined", 0, 0x80, XCVR_10baseT, 10000},
- { "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10},
- { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10},
- { "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10},
- { "MII", 0, 0x40, XCVR_10baseT, 3 * HZ},
- { "undefined", 0, 0x01, XCVR_10baseT, 10000},
- { "Default", 0, 0xFF, XCVR_10baseT, 10000},
- };
- #ifdef CONFIG_ISAPNP
- static struct isapnp_device_id corkscrew_isapnp_adapters[] = {
- { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
- ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051),
- (long) "3Com Fast EtherLink ISA" },
- { } /* terminate list */
- };
- MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters);
- static int corkscrew_isapnp_phys_addr[3];
- static int nopnp;
- #endif /* CONFIG_ISAPNP */
- static int corkscrew_scan(struct net_device *dev);
- static struct net_device *corkscrew_found_device(struct net_device *dev,
- int ioaddr, int irq,
- int product_index,
- int options);
- static int corkscrew_probe1(struct net_device *dev);
- static int corkscrew_open(struct net_device *dev);
- static void corkscrew_timer(unsigned long arg);
- static int corkscrew_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
- static int corkscrew_rx(struct net_device *dev);
- static void corkscrew_timeout(struct net_device *dev);
- static int boomerang_rx(struct net_device *dev);
- static void corkscrew_interrupt(int irq, void *dev_id,
- struct pt_regs *regs);
- static int corkscrew_close(struct net_device *dev);
- static void update_stats(int addr, struct net_device *dev);
- static struct net_device_stats *corkscrew_get_stats(struct net_device *dev);
- static void set_rx_mode(struct net_device *dev);
- static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
- /*
- Unfortunately maximizing the shared code between the integrated and
- module version of the driver results in a complicated set of initialization
- procedures.
- init_module() -- modules / tc59x_init() -- built-in
- The wrappers for corkscrew_scan()
- corkscrew_scan() The common routine that scans for PCI and EISA cards
- corkscrew_found_device() Allocate a device structure when we find a card.
- Different versions exist for modules and built-in.
- corkscrew_probe1() Fill in the device structure -- this is separated
- so that the modules code can put it in dev->init.
- */
- /* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
- /* Note: this is the only limit on the number of cards supported!! */
- static int options[8] = { -1, -1, -1, -1, -1, -1, -1, -1, };
- #ifdef MODULE
- static int debug = -1;
- /* A list of all installed Vortex devices, for removing the driver module. */
- static struct net_device *root_corkscrew_dev;
- int init_module(void)
- {
- int cards_found;
- if (debug >= 0)
- corkscrew_debug = debug;
- if (corkscrew_debug)
- printk(version);
- root_corkscrew_dev = NULL;
- cards_found = corkscrew_scan(NULL);
- return cards_found ? 0 : -ENODEV;
- }
- #else
- int tc515_probe(struct net_device *dev)
- {
- int cards_found = 0;
- SET_MODULE_OWNER(dev);
- cards_found = corkscrew_scan(dev);
- if (corkscrew_debug > 0 && cards_found)
- printk(version);
- return cards_found ? 0 : -ENODEV;
- }
- #endif /* not MODULE */
- static int corkscrew_scan(struct net_device *dev)
- {
- int cards_found = 0;
- static int ioaddr;
- #ifdef CONFIG_ISAPNP
- short i;
- static int pnp_cards;
- #endif
- #ifdef CONFIG_ISAPNP
- if(nopnp == 1)
- goto no_pnp;
- for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
- struct pci_dev *idev = NULL;
- int irq;
- while((idev = isapnp_find_dev(NULL,
- corkscrew_isapnp_adapters[i].vendor,
- corkscrew_isapnp_adapters[i].function,
- idev))) {
- if(idev->active) idev->deactivate(idev);
- if(idev->prepare(idev)<0)
- continue;
- if (!(idev->resource[0].flags & IORESOURCE_IO))
- continue;
- if(idev->activate(idev)<0) {
- printk("isapnp configure failed (out of resources?)n");
- return -ENOMEM;
- }
- if (!idev->resource[0].start || check_region(idev->resource[0].start,16))
- continue;
- ioaddr = idev->resource[0].start;
- irq = idev->irq_resource[0].start;
- if(corkscrew_debug)
- printk ("ISAPNP reports %s at i/o 0x%x, irq %dn",
- (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
-
- if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0))
- continue;
- /* Verify by reading the device ID from the EEPROM. */
- {
- int timer;
- outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
- /* Pause for at least 162 us. for the read to take place. */
- for (timer = 4; timer >= 0; timer--) {
- udelay(162);
- if ((inw(ioaddr + Wn0EepromCmd) & 0x0200)
- == 0)
- break;
- }
- if (inw(ioaddr + Wn0EepromData) != 0x6d50)
- continue;
- }
- printk(KERN_INFO "3c515 Resource configuration register %#4.4x, DCR %4.4x.n",
- inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
- /* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */
- corkscrew_isapnp_phys_addr[pnp_cards] = ioaddr;
- corkscrew_found_device(dev, ioaddr, irq, CORKSCREW_ID, dev
- && dev->mem_start ? dev->
- mem_start : options[cards_found]);
- dev = 0;
- pnp_cards++;
- cards_found++;
- }
- }
- no_pnp:
- #endif /* CONFIG_ISAPNP */
- /* Check all locations on the ISA bus -- evil! */
- for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
- int irq;
- #ifdef CONFIG_ISAPNP
- /* Make sure this was not already picked up by isapnp */
- if(ioaddr == corkscrew_isapnp_phys_addr[0]) continue;
- if(ioaddr == corkscrew_isapnp_phys_addr[1]) continue;
- if(ioaddr == corkscrew_isapnp_phys_addr[2]) continue;
- #endif /* CONFIG_ISAPNP */
- if (check_region(ioaddr, CORKSCREW_TOTAL_SIZE))
- continue;
- /* Check the resource configuration for a matching ioaddr. */
- if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0))
- continue;
- /* Verify by reading the device ID from the EEPROM. */
- {
- int timer;
- outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
- /* Pause for at least 162 us. for the read to take place. */
- for (timer = 4; timer >= 0; timer--) {
- udelay(162);
- if ((inw(ioaddr + Wn0EepromCmd) & 0x0200)
- == 0)
- break;
- }
- if (inw(ioaddr + Wn0EepromData) != 0x6d50)
- continue;
- }
- printk(KERN_INFO "3c515 Resource configuration register %#4.4x, DCR %4.4x.n",
- inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
- irq = inw(ioaddr + 0x2002) & 15;
- corkscrew_found_device(dev, ioaddr, irq, CORKSCREW_ID, dev
- && dev->mem_start ? dev->
- mem_start : options[cards_found]);
- dev = 0;
- cards_found++;
- }
- if (corkscrew_debug)
- printk(KERN_INFO "%d 3c515 cards found.n", cards_found);
- return cards_found;
- }
- static struct net_device *corkscrew_found_device(struct net_device *dev,
- int ioaddr, int irq,
- int product_index,
- int options)
- {
- struct corkscrew_private *vp;
- #ifdef MODULE
- /* Allocate and fill new device structure. */
- int dev_size = sizeof(struct net_device) +
- sizeof(struct corkscrew_private) + 15; /* Pad for alignment */
- dev = (struct net_device *) kmalloc(dev_size, GFP_KERNEL);
- if (!dev)
- return NULL;
- memset(dev, 0, dev_size);
- /* Align the Rx and Tx ring entries. */
- dev->priv =
- (void *) (((long) dev + sizeof(struct net_device) + 15) & ~15);
- vp = (struct corkscrew_private *) dev->priv;
- dev->base_addr = ioaddr;
- dev->irq = irq;
- dev->dma =
- (product_index == CORKSCREW_ID ? inw(ioaddr + 0x2000) & 7 : 0);
- dev->init = corkscrew_probe1;
- vp->product_name = "3c515";
- vp->options = options;
- if (options >= 0) {
- vp->media_override =
- ((options & 7) == 2) ? 0 : options & 7;
- vp->full_duplex = (options & 8) ? 1 : 0;
- vp->bus_master = (options & 16) ? 1 : 0;
- } else {
- vp->media_override = 7;
- vp->full_duplex = 0;
- vp->bus_master = 0;
- }
- ether_setup(dev);
- vp->next_module = root_corkscrew_dev;
- root_corkscrew_dev = dev;
- SET_MODULE_OWNER(dev);
- if (register_netdev(dev) != 0) {
- kfree(dev);
- return NULL;
- }
- #else /* not a MODULE */
- /* Caution: quad-word alignment required for rings! */
- dev->priv =
- kmalloc(sizeof(struct corkscrew_private), GFP_KERNEL);
- if (!dev->priv)
- return NULL;
- memset(dev->priv, 0, sizeof(struct corkscrew_private));
- dev = init_etherdev(dev, sizeof(struct corkscrew_private));
- dev->base_addr = ioaddr;
- dev->irq = irq;
- dev->dma =
- (product_index == CORKSCREW_ID ? inw(ioaddr + 0x2000) & 7 : 0);
- vp = (struct corkscrew_private *) dev->priv;
- vp->product_name = "3c515";
- vp->options = options;
- if (options >= 0) {
- vp->media_override =
- ((options & 7) == 2) ? 0 : options & 7;
- vp->full_duplex = (options & 8) ? 1 : 0;
- vp->bus_master = (options & 16) ? 1 : 0;
- } else {
- vp->media_override = 7;
- vp->full_duplex = 0;
- vp->bus_master = 0;
- }
- corkscrew_probe1(dev);
- #endif /* MODULE */
- return dev;
- }
- static int corkscrew_probe1(struct net_device *dev)
- {
- int ioaddr = dev->base_addr;
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
- int i;
- printk(KERN_INFO "%s: 3Com %s at %#3x,", dev->name,
- vp->product_name, ioaddr);
- /* Read the station address from the EEPROM. */
- EL3WINDOW(0);
- for (i = 0; i < 0x18; i++) {
- short *phys_addr = (short *) dev->dev_addr;
- int timer;
- outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
- /* Pause for at least 162 us. for the read to take place. */
- for (timer = 4; timer >= 0; timer--) {
- udelay(162);
- if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
- break;
- }
- eeprom[i] = inw(ioaddr + Wn0EepromData);
- checksum ^= eeprom[i];
- if (i < 3)
- phys_addr[i] = htons(eeprom[i]);
- }
- checksum = (checksum ^ (checksum >> 8)) & 0xff;
- if (checksum != 0x00)
- printk(" ***INVALID CHECKSUM %4.4x*** ", checksum);
- for (i = 0; i < 6; i++)
- printk("%c%2.2x", i ? ':' : ' ', dev->dev_addr[i]);
- if (eeprom[16] == 0x11c7) { /* Corkscrew */
- if (request_dma(dev->dma, "3c515")) {
- printk(", DMA %d allocation failed", dev->dma);
- dev->dma = 0;
- } else
- printk(", DMA %d", dev->dma);
- }
- printk(", IRQ %dn", dev->irq);
- /* Tell them about an invalid IRQ. */
- if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
- printk(KERN_WARNING " *** Warning: this IRQ is unlikely to work! ***n");
- {
- char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
- union wn3_config config;
- EL3WINDOW(3);
- vp->available_media = inw(ioaddr + Wn3_Options);
- config.i = inl(ioaddr + Wn3_Config);
- if (corkscrew_debug > 1)
- printk(KERN_INFO " Internal config register is %4.4x, transceivers %#x.n",
- config.i, inw(ioaddr + Wn3_Options));
- printk(KERN_INFO " %dK %s-wide RAM %s Rx:Tx split, %s%s interface.n",
- 8 << config.u.ram_size,
- config.u.ram_width ? "word" : "byte",
- ram_split[config.u.ram_split],
- config.u.autoselect ? "autoselect/" : "",
- media_tbl[config.u.xcvr].name);
- dev->if_port = config.u.xcvr;
- vp->default_media = config.u.xcvr;
- vp->autoselect = config.u.autoselect;
- }
- if (vp->media_override != 7) {
- printk(KERN_INFO " Media override to transceiver type %d (%s).n",
- vp->media_override,
- media_tbl[vp->media_override].name);
- dev->if_port = vp->media_override;
- }
- vp->capabilities = eeprom[16];
- vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
- /* Rx is broken at 10mbps, so we always disable it. */
- /* vp->full_bus_master_rx = 0; */
- vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
- /* We do a request_region() to register /proc/ioports info. */
- request_region(ioaddr, CORKSCREW_TOTAL_SIZE, vp->product_name);
- /* The 3c51x-specific entries in the device structure. */
- dev->open = &corkscrew_open;
- dev->hard_start_xmit = &corkscrew_start_xmit;
- dev->tx_timeout = &corkscrew_timeout;
- dev->watchdog_timeo = (400 * HZ) / 1000;
- dev->stop = &corkscrew_close;
- dev->get_stats = &corkscrew_get_stats;
- dev->set_multicast_list = &set_rx_mode;
- dev->do_ioctl = netdev_ioctl;
- return 0;
- }
- static int corkscrew_open(struct net_device *dev)
- {
- int ioaddr = dev->base_addr;
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- union wn3_config config;
- int i;
- /* Before initializing select the active media port. */
- EL3WINDOW(3);
- if (vp->full_duplex)
- outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
- config.i = inl(ioaddr + Wn3_Config);
- if (vp->media_override != 7) {
- if (corkscrew_debug > 1)
- printk(KERN_INFO "%s: Media override to transceiver %d (%s).n",
- dev->name, vp->media_override,
- media_tbl[vp->media_override].name);
- dev->if_port = vp->media_override;
- } else if (vp->autoselect) {
- /* Find first available media type, starting with 100baseTx. */
- dev->if_port = 4;
- while (!(vp->available_media & media_tbl[dev->if_port].mask))
- dev->if_port = media_tbl[dev->if_port].next;
- if (corkscrew_debug > 1)
- printk("%s: Initial media type %s.n",
- dev->name, media_tbl[dev->if_port].name);
- init_timer(&vp->timer);
- vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait);
- vp->timer.data = (unsigned long) dev;
- vp->timer.function = &corkscrew_timer; /* timer handler */
- add_timer(&vp->timer);
- } else
- dev->if_port = vp->default_media;
- config.u.xcvr = dev->if_port;
- outl(config.i, ioaddr + Wn3_Config);
- if (corkscrew_debug > 1) {
- printk("%s: corkscrew_open() InternalConfig %8.8x.n",
- dev->name, config.i);
- }
- outw(TxReset, ioaddr + EL3_CMD);
- for (i = 20; i >= 0; i--)
- if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- outw(RxReset, ioaddr + EL3_CMD);
- /* Wait a few ticks for the RxReset command to complete. */
- for (i = 20; i >= 0; i--)
- if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
- /* Use the now-standard shared IRQ implementation. */
- if (vp->capabilities == 0x11c7) {
- /* Corkscrew: Cannot share ISA resources. */
- if (dev->irq == 0
- || dev->dma == 0
- || request_irq(dev->irq, &corkscrew_interrupt, 0,
- vp->product_name, dev)) return -EAGAIN;
- enable_dma(dev->dma);
- set_dma_mode(dev->dma, DMA_MODE_CASCADE);
- } else if (request_irq(dev->irq, &corkscrew_interrupt, SA_SHIRQ,
- vp->product_name, dev)) {
- return -EAGAIN;
- }
- if (corkscrew_debug > 1) {
- EL3WINDOW(4);
- printk("%s: corkscrew_open() irq %d media status %4.4x.n",
- dev->name, dev->irq, inw(ioaddr + Wn4_Media));
- }
- /* Set the station address and mask in window 2 each time opened. */
- EL3WINDOW(2);
- for (i = 0; i < 6; i++)
- outb(dev->dev_addr[i], ioaddr + i);
- for (; i < 12; i += 2)
- outw(0, ioaddr + i);
- if (dev->if_port == 3)
- /* Start the thinnet transceiver. We should really wait 50ms... */
- outw(StartCoax, ioaddr + EL3_CMD);
- EL3WINDOW(4);
- outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
- media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
- /* Switch to the stats window, and clear all stats by reading. */
- outw(StatsDisable, ioaddr + EL3_CMD);
- EL3WINDOW(6);
- for (i = 0; i < 10; i++)
- inb(ioaddr + i);
- inw(ioaddr + 10);
- inw(ioaddr + 12);
- /* New: On the Vortex we must also clear the BadSSD counter. */
- EL3WINDOW(4);
- inb(ioaddr + 12);
- /* ..and on the Boomerang we enable the extra statistics bits. */
- outw(0x0040, ioaddr + Wn4_NetDiag);
- /* Switch to register set 7 for normal use. */
- EL3WINDOW(7);
- if (vp->full_bus_master_rx) { /* Boomerang bus master. */
- vp->cur_rx = vp->dirty_rx = 0;
- if (corkscrew_debug > 2)
- printk("%s: Filling in the Rx ring.n",
- dev->name);
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb;
- if (i < (RX_RING_SIZE - 1))
- vp->rx_ring[i].next =
- virt_to_bus(&vp->rx_ring[i + 1]);
- else
- vp->rx_ring[i].next = 0;
- vp->rx_ring[i].status = 0; /* Clear complete bit. */
- vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
- skb = dev_alloc_skb(PKT_BUF_SZ);
- vp->rx_skbuff[i] = skb;
- if (skb == NULL)
- break; /* Bad news! */
- skb->dev = dev; /* Mark as being used by this device. */
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- vp->rx_ring[i].addr = virt_to_bus(skb->tail);
- }
- vp->rx_ring[i - 1].next = virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
- outl(virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
- }
- if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
- vp->cur_tx = vp->dirty_tx = 0;
- outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
- /* Clear the Tx ring. */
- for (i = 0; i < TX_RING_SIZE; i++)
- vp->tx_skbuff[i] = 0;
- outl(0, ioaddr + DownListPtr);
- }
- /* Set receiver mode: presumably accept b-case and phys addr only. */
- set_rx_mode(dev);
- outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
- netif_start_queue(dev);
- outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
- outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
- /* Allow status bits to be seen. */
- outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
- (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
- (vp->full_bus_master_rx ? UpComplete : RxComplete) |
- (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
- /* Ack all pending events, and set active indicator mask. */
- outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
- ioaddr + EL3_CMD);
- outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
- | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
- ioaddr + EL3_CMD);
- return 0;
- }
- static void corkscrew_timer(unsigned long data)
- {
- #ifdef AUTOMEDIA
- struct net_device *dev = (struct net_device *) data;
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- int ioaddr = dev->base_addr;
- unsigned long flags;
- int ok = 0;
- if (corkscrew_debug > 1)
- printk("%s: Media selection timer tick happened, %s.n",
- dev->name, media_tbl[dev->if_port].name);
- save_flags(flags);
- cli(); {
- int old_window = inw(ioaddr + EL3_CMD) >> 13;
- int media_status;
- EL3WINDOW(4);
- media_status = inw(ioaddr + Wn4_Media);
- switch (dev->if_port) {
- case 0:
- case 4:
- case 5: /* 10baseT, 100baseTX, 100baseFX */
- if (media_status & Media_LnkBeat) {
- ok = 1;
- if (corkscrew_debug > 1)
- printk("%s: Media %s has link beat, %x.n",
- dev->name,
- media_tbl[dev->if_port].name,
- media_status);
- } else if (corkscrew_debug > 1)
- printk("%s: Media %s is has no link beat, %x.n",
- dev->name,
- media_tbl[dev->if_port].name,
- media_status);
- break;
- default: /* Other media types handled by Tx timeouts. */
- if (corkscrew_debug > 1)
- printk("%s: Media %s is has no indication, %x.n",
- dev->name,
- media_tbl[dev->if_port].name,
- media_status);
- ok = 1;
- }
- if (!ok) {
- union wn3_config config;
- do {
- dev->if_port =
- media_tbl[dev->if_port].next;
- }
- while (!(vp->available_media & media_tbl[dev->if_port].mask));
-
- if (dev->if_port == 8) { /* Go back to default. */
- dev->if_port = vp->default_media;
- if (corkscrew_debug > 1)
- printk("%s: Media selection failing, using default %s port.n",
- dev->name,
- media_tbl[dev->if_port].name);
- } else {
- if (corkscrew_debug > 1)
- printk("%s: Media selection failed, now trying %s port.n",
- dev->name,
- media_tbl[dev->if_port].name);
- vp->timer.expires = RUN_AT(media_tbl[dev->if_port].wait);
- add_timer(&vp->timer);
- }
- outw((media_status & ~(Media_10TP | Media_SQE)) |
- media_tbl[dev->if_port].media_bits,
- ioaddr + Wn4_Media);
- EL3WINDOW(3);
- config.i = inl(ioaddr + Wn3_Config);
- config.u.xcvr = dev->if_port;
- outl(config.i, ioaddr + Wn3_Config);
- outw(dev->if_port == 3 ? StartCoax : StopCoax,
- ioaddr + EL3_CMD);
- }
- EL3WINDOW(old_window);
- }
- restore_flags(flags);
- if (corkscrew_debug > 1)
- printk("%s: Media selection timer finished, %s.n",
- dev->name, media_tbl[dev->if_port].name);
- #endif /* AUTOMEDIA */
- return;
- }
- static void corkscrew_timeout(struct net_device *dev)
- {
- int i;
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- int ioaddr = dev->base_addr;
- printk(KERN_WARNING
- "%s: transmit timed out, tx_status %2.2x status %4.4x.n",
- dev->name, inb(ioaddr + TxStatus),
- inw(ioaddr + EL3_STATUS));
- /* Slight code bloat to be user friendly. */
- if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
- printk(KERN_WARNING
- "%s: Transmitter encountered 16 collisions -- network"
- " network cable problem?n", dev->name);
- #ifndef final_version
- printk(" Flags; bus-master %d, full %d; dirty %d current %d.n",
- vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
- vp->cur_tx);
- printk(" Down list %8.8x vs. %p.n", inl(ioaddr + DownListPtr),
- &vp->tx_ring[0]);
- for (i = 0; i < TX_RING_SIZE; i++) {
- printk(" %d: %p length %8.8x status %8.8xn", i,
- &vp->tx_ring[i],
- vp->tx_ring[i].length, vp->tx_ring[i].status);
- }
- #endif
- /* Issue TX_RESET and TX_START commands. */
- outw(TxReset, ioaddr + EL3_CMD);
- for (i = 20; i >= 0; i--)
- if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- outw(TxEnable, ioaddr + EL3_CMD);
- dev->trans_start = jiffies;
- vp->stats.tx_errors++;
- vp->stats.tx_dropped++;
- netif_wake_queue(dev);
- }
- static int corkscrew_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
- {
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- int ioaddr = dev->base_addr;
- /* Block a timer-based transmit from overlapping. */
- netif_stop_queue(dev);
- if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
- /* Calculate the next Tx descriptor entry. */
- int entry = vp->cur_tx % TX_RING_SIZE;
- struct boom_tx_desc *prev_entry;
- unsigned long flags, i;
- if (vp->tx_full) /* No room to transmit with */
- return 1;
- if (vp->cur_tx != 0)
- prev_entry =
- &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
- else
- prev_entry = NULL;
- if (corkscrew_debug > 3)
- printk("%s: Trying to send a packet, Tx index %d.n",
- dev->name, vp->cur_tx);
- /* vp->tx_full = 1; */
- vp->tx_skbuff[entry] = skb;
- vp->tx_ring[entry].next = 0;
- vp->tx_ring[entry].addr = virt_to_bus(skb->data);
- vp->tx_ring[entry].length = skb->len | 0x80000000;
- vp->tx_ring[entry].status = skb->len | 0x80000000;
- save_flags(flags);
- cli();
- outw(DownStall, ioaddr + EL3_CMD);
- /* Wait for the stall to complete. */
- for (i = 20; i >= 0; i--)
- if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) ==
- 0) break;
- if (prev_entry)
- prev_entry->next =
- virt_to_bus(&vp->tx_ring[entry]);
- if (inl(ioaddr + DownListPtr) == 0) {
- outl(virt_to_bus(&vp->tx_ring[entry]),
- ioaddr + DownListPtr);
- queued_packet++;
- }
- outw(DownUnstall, ioaddr + EL3_CMD);
- restore_flags(flags);
- vp->cur_tx++;
- if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
- vp->tx_full = 1;
- else { /* Clear previous interrupt enable. */
- if (prev_entry)
- prev_entry->status &= ~0x80000000;
- netif_wake_queue(dev);
- }
- dev->trans_start = jiffies;
- return 0;
- }
- /* Put out the doubleword header... */
- outl(skb->len, ioaddr + TX_FIFO);
- vp->stats.tx_bytes += skb->len;
- #ifdef VORTEX_BUS_MASTER
- if (vp->bus_master) {
- /* Set the bus-master controller to transfer the packet. */
- outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
- outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
- vp->tx_skb = skb;
- outw(StartDMADown, ioaddr + EL3_CMD);
- /* queue will be woken at the DMADone interrupt. */
- } else {
- /* ... and the packet rounded to a doubleword. */
- outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
- dev_kfree_skb(skb);
- if (inw(ioaddr + TxFree) > 1536) {
- netif_wake_queue(dev);
- } else
- /* Interrupt us when the FIFO has room for max-sized packet. */
- outw(SetTxThreshold + (1536 >> 2),
- ioaddr + EL3_CMD);
- }
- #else
- /* ... and the packet rounded to a doubleword. */
- outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
- dev_kfree_skb(skb);
- if (inw(ioaddr + TxFree) > 1536) {
- netif_wake_queue(dev);
- } else
- /* Interrupt us when the FIFO has room for max-sized packet. */
- outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
- #endif /* bus master */
- dev->trans_start = jiffies;
- /* Clear the Tx status stack. */
- {
- short tx_status;
- int i = 4;
- while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
- if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
- if (corkscrew_debug > 2)
- printk("%s: Tx error, status %2.2x.n",
- dev->name, tx_status);
- if (tx_status & 0x04)
- vp->stats.tx_fifo_errors++;
- if (tx_status & 0x38)
- vp->stats.tx_aborted_errors++;
- if (tx_status & 0x30) {
- int j;
- outw(TxReset, ioaddr + EL3_CMD);
- for (j = 20; j >= 0; j--)
- if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- }
- outw(TxEnable, ioaddr + EL3_CMD);
- }
- outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
- }
- }
- return 0;
- }
- /* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
- static void corkscrew_interrupt(int irq, void *dev_id,
- struct pt_regs *regs)
- {
- /* Use the now-standard shared IRQ implementation. */
- struct net_device *dev = dev_id;
- struct corkscrew_private *lp;
- int ioaddr, status;
- int latency;
- int i = max_interrupt_work;
- ioaddr = dev->base_addr;
- latency = inb(ioaddr + Timer);
- lp = (struct corkscrew_private *) dev->priv;
- status = inw(ioaddr + EL3_STATUS);
- if (corkscrew_debug > 4)
- printk("%s: interrupt, status %4.4x, timer %d.n",
- dev->name, status, latency);
- if ((status & 0xE000) != 0xE000) {
- static int donedidthis;
- /* Some interrupt controllers store a bogus interrupt from boot-time.
- Ignore a single early interrupt, but don't hang the machine for
- other interrupt problems. */
- if (donedidthis++ > 100) {
- printk(KERN_ERR "%s: Bogus interrupt, bailing. Status %4.4x, start=%d.n",
- dev->name, status, netif_running(dev));
- free_irq(dev->irq, dev);
- }
- }
- do {
- if (corkscrew_debug > 5)
- printk("%s: In interrupt loop, status %4.4x.n",
- dev->name, status);
- if (status & RxComplete)
- corkscrew_rx(dev);
- if (status & TxAvailable) {
- if (corkscrew_debug > 5)
- printk
- (" TX room bit was handled.n");
- /* There's room in the FIFO for a full-sized packet. */
- outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
- netif_wake_queue(dev);
- }
- if (status & DownComplete) {
- unsigned int dirty_tx = lp->dirty_tx;
- while (lp->cur_tx - dirty_tx > 0) {
- int entry = dirty_tx % TX_RING_SIZE;
- if (inl(ioaddr + DownListPtr) ==
- virt_to_bus(&lp->tx_ring[entry]))
- break; /* It still hasn't been processed. */
- if (lp->tx_skbuff[entry]) {
- dev_kfree_skb_irq(lp->
- tx_skbuff
- [entry]);
- lp->tx_skbuff[entry] = 0;
- }
- dirty_tx++;
- }
- lp->dirty_tx = dirty_tx;
- outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
- if (lp->tx_full
- && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
- lp->tx_full = 0;
- netif_wake_queue(dev);
- }
- }
- #ifdef VORTEX_BUS_MASTER
- if (status & DMADone) {
- outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
- dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
- netif_wake_queue(dev);
- }
- #endif
- if (status & UpComplete) {
- boomerang_rx(dev);
- outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
- }
- if (status & (AdapterFailure | RxEarly | StatsFull)) {
- /* Handle all uncommon interrupts at once. */
- if (status & RxEarly) { /* Rx early is unused. */
- corkscrew_rx(dev);
- outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
- }
- if (status & StatsFull) { /* Empty statistics. */
- static int DoneDidThat;
- if (corkscrew_debug > 4)
- printk("%s: Updating stats.n",
- dev->name);
- update_stats(ioaddr, dev);
- /* DEBUG HACK: Disable statistics as an interrupt source. */
- /* This occurs when we have the wrong media type! */
- if (DoneDidThat == 0 &&
- inw(ioaddr + EL3_STATUS) & StatsFull) {
- int win, reg;
- printk("%s: Updating stats failed, disabling stats as an"
- " interrupt source.n",
- dev->name);
- for (win = 0; win < 8; win++) {
- EL3WINDOW(win);
- printk("n Vortex window %d:", win);
- for (reg = 0; reg < 16; reg++)
- printk(" %2.2x",
- inb(ioaddr + reg));
- }
- EL3WINDOW(7);
- outw(SetIntrEnb | TxAvailable |
- RxComplete | AdapterFailure |
- UpComplete | DownComplete |
- TxComplete, ioaddr + EL3_CMD);
- DoneDidThat++;
- }
- }
- if (status & AdapterFailure) {
- /* Adapter failure requires Rx reset and reinit. */
- outw(RxReset, ioaddr + EL3_CMD);
- /* Set the Rx filter to the current state. */
- set_rx_mode(dev);
- outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
- outw(AckIntr | AdapterFailure,
- ioaddr + EL3_CMD);
- }
- }
- if (--i < 0) {
- printk(KERN_ERR "%s: Too much work in interrupt, status %4.4x. "
- "Disabling functions (%4.4x).n", dev->name,
- status, SetStatusEnb | ((~status) & 0x7FE));
- /* Disable all pending interrupts. */
- outw(SetStatusEnb | ((~status) & 0x7FE),
- ioaddr + EL3_CMD);
- outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
- break;
- }
- /* Acknowledge the IRQ. */
- outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
- } while ((status = inw(ioaddr + EL3_STATUS)) &
- (IntLatch | RxComplete));
- if (corkscrew_debug > 4)
- printk("%s: exiting interrupt, status %4.4x.n", dev->name,
- status);
- }
- static int corkscrew_rx(struct net_device *dev)
- {
- struct corkscrew_private *vp = (struct corkscrew_private *) dev->priv;
- int ioaddr = dev->base_addr;
- int i;
- short rx_status;
- if (corkscrew_debug > 5)
- printk(" In rx_packet(), status %4.4x, rx_status %4.4x.n",
- inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
- while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
- if (rx_status & 0x4000) { /* Error, update stats. */
- unsigned char rx_error = inb(ioaddr + RxErrors);
- if (corkscrew_debug > 2)
- printk(" Rx error: status %2.2x.n",
- rx_error);
- vp->stats.rx_errors++;
- if (rx_error & 0x01)
- vp->stats.rx_over_errors++;
- if (rx_error & 0x02)
- vp->stats.rx_length_errors++;
- if (rx_error & 0x04)
- vp->stats.rx_frame_errors++;
- if (rx_error & 0x08)
- vp->stats.rx_crc_errors++;
- if (rx_error & 0x10)
- vp->stats.rx_length_errors++;
- } else {
- /* The packet length: up to 4.5K!. */
- short pkt_len = rx_status & 0x1fff;
- struct sk_buff *skb;
- skb = dev_alloc_skb(pkt_len + 5 + 2);
- if (corkscrew_debug > 4)
- printk("Receiving packet size %d status %4.4x.n",
- pkt_len, rx_status);
- if (skb != NULL) {
- skb->dev = dev;
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- /* 'skb_put()' points to the start of sk_buff data area. */
- insl(ioaddr + RX_FIFO,
- skb_put(skb, pkt_len),
- (pkt_len + 3) >> 2);
- outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- vp->stats.rx_packets++;
- vp->stats.rx_bytes += pkt_len;
- /* Wait a limited time to go to next packet. */
- for (i = 200; i >= 0; i--)
- if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- continue;
- } else if (corkscrew_debug)
- printk("%s: Couldn't allocate a sk_buff of size %d.n", dev->name, pkt_len);
- }
- outw(RxDiscard, ioaddr + EL3_CMD);
- vp->stats.rx_dropped++;
- /* Wait a limited time to skip this packet. */
- for (i = 200; i >= 0; i--)
- if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
- break;
- }
- return 0;
- }
- static int boomerang_rx(struct net_device *dev)
- {
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- int entry = vp->cur_rx % RX_RING_SIZE;
- int ioaddr = dev->base_addr;
- int rx_status;
- if (corkscrew_debug > 5)
- printk(" In boomerang_rx(), status %4.4x, rx_status %4.4x.n",
- inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
- while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
- if (rx_status & RxDError) { /* Error, update stats. */
- unsigned char rx_error = rx_status >> 16;
- if (corkscrew_debug > 2)
- printk(" Rx error: status %2.2x.n",
- rx_error);
- vp->stats.rx_errors++;
- if (rx_error & 0x01)
- vp->stats.rx_over_errors++;
- if (rx_error & 0x02)
- vp->stats.rx_length_errors++;
- if (rx_error & 0x04)
- vp->stats.rx_frame_errors++;
- if (rx_error & 0x08)
- vp->stats.rx_crc_errors++;
- if (rx_error & 0x10)
- vp->stats.rx_length_errors++;
- } else {
- /* The packet length: up to 4.5K!. */
- short pkt_len = rx_status & 0x1fff;
- struct sk_buff *skb;
- vp->stats.rx_bytes += pkt_len;
- if (corkscrew_debug > 4)
- printk("Receiving packet size %d status %4.4x.n",
- pkt_len, rx_status);
- /* Check if the packet is long enough to just accept without
- copying to a properly sized skbuff. */
- if (pkt_len < rx_copybreak
- && (skb = dev_alloc_skb(pkt_len + 4)) != 0) {
- skb->dev = dev;
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- /* 'skb_put()' points to the start of sk_buff data area. */
- memcpy(skb_put(skb, pkt_len),
- bus_to_virt(vp->rx_ring[entry].
- addr), pkt_len);
- rx_copy++;
- } else {
- void *temp;
- /* Pass up the skbuff already on the Rx ring. */
- skb = vp->rx_skbuff[entry];
- vp->rx_skbuff[entry] = NULL;
- temp = skb_put(skb, pkt_len);
- /* Remove this checking code for final release. */
- if (bus_to_virt(vp->rx_ring[entry].addr) != temp)
- printk("%s: Warning -- the skbuff addresses do not match"
- " in boomerang_rx: %p vs. %p / %p.n",
- dev->name,
- bus_to_virt(vp->
- rx_ring[entry].
- addr), skb->head,
- temp);
- rx_nocopy++;
- }
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- vp->stats.rx_packets++;
- }
- entry = (++vp->cur_rx) % RX_RING_SIZE;
- }
- /* Refill the Rx ring buffers. */
- for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
- struct sk_buff *skb;
- entry = vp->dirty_rx % RX_RING_SIZE;
- if (vp->rx_skbuff[entry] == NULL) {
- skb = dev_alloc_skb(PKT_BUF_SZ);
- if (skb == NULL)
- break; /* Bad news! */
- skb->dev = dev; /* Mark as being used by this device. */
- skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
- vp->rx_ring[entry].addr = virt_to_bus(skb->tail);
- vp->rx_skbuff[entry] = skb;
- }
- vp->rx_ring[entry].status = 0; /* Clear complete bit. */
- }
- return 0;
- }
- static int corkscrew_close(struct net_device *dev)
- {
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- int ioaddr = dev->base_addr;
- int i;
- netif_stop_queue(dev);
- if (corkscrew_debug > 1) {
- printk("%s: corkscrew_close() status %4.4x, Tx status %2.2x.n",
- dev->name, inw(ioaddr + EL3_STATUS),
- inb(ioaddr + TxStatus));
- printk("%s: corkscrew close stats: rx_nocopy %d rx_copy %d"
- " tx_queued %d.n", dev->name, rx_nocopy, rx_copy,
- queued_packet);
- }
- del_timer(&vp->timer);
- /* Turn off statistics ASAP. We update lp->stats below. */
- outw(StatsDisable, ioaddr + EL3_CMD);
- /* Disable the receiver and transmitter. */
- outw(RxDisable, ioaddr + EL3_CMD);
- outw(TxDisable, ioaddr + EL3_CMD);
- if (dev->if_port == XCVR_10base2)
- /* Turn off thinnet power. Green! */
- outw(StopCoax, ioaddr + EL3_CMD);
- free_irq(dev->irq, dev);
- outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
- update_stats(ioaddr, dev);
- if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
- outl(0, ioaddr + UpListPtr);
- for (i = 0; i < RX_RING_SIZE; i++)
- if (vp->rx_skbuff[i]) {
- dev_kfree_skb(vp->rx_skbuff[i]);
- vp->rx_skbuff[i] = 0;
- }
- }
- if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
- outl(0, ioaddr + DownListPtr);
- for (i = 0; i < TX_RING_SIZE; i++)
- if (vp->tx_skbuff[i]) {
- dev_kfree_skb(vp->tx_skbuff[i]);
- vp->tx_skbuff[i] = 0;
- }
- }
- return 0;
- }
- static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
- {
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- unsigned long flags;
- if (netif_running(dev)) {
- save_flags(flags);
- cli();
- update_stats(dev->base_addr, dev);
- restore_flags(flags);
- }
- return &vp->stats;
- }
- /* Update statistics.
- Unlike with the EL3 we need not worry about interrupts changing
- the window setting from underneath us, but we must still guard
- against a race condition with a StatsUpdate interrupt updating the
- table. This is done by checking that the ASM (!) code generated uses
- atomic updates with '+='.
- */
- static void update_stats(int ioaddr, struct net_device *dev)
- {
- struct corkscrew_private *vp =
- (struct corkscrew_private *) dev->priv;
- /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
- /* Switch to the stats window, and read everything. */
- EL3WINDOW(6);
- vp->stats.tx_carrier_errors += inb(ioaddr + 0);
- vp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
- /* Multiple collisions. */ inb(ioaddr + 2);
- vp->stats.collisions += inb(ioaddr + 3);
- vp->stats.tx_window_errors += inb(ioaddr + 4);
- vp->stats.rx_fifo_errors += inb(ioaddr + 5);
- vp->stats.tx_packets += inb(ioaddr + 6);
- vp->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
- /* Rx packets */ inb(ioaddr + 7);
- /* Must read to clear */
- /* Tx deferrals */ inb(ioaddr + 8);
- /* Don't bother with register 9, an extension of registers 6&7.
- If we do use the 6&7 values the atomic update assumption above
- is invalid. */
- inw(ioaddr + 10); /* Total Rx and Tx octets. */
- inw(ioaddr + 12);
- /* New: On the Vortex we must also clear the BadSSD counter. */
- EL3WINDOW(4);
- inb(ioaddr + 12);
- /* We change back to window 7 (not 1) with the Vortex. */
- EL3WINDOW(7);
- return;
- }
- /* This new version of set_rx_mode() supports v1.4 kernels.
- The Vortex chip has no documented multicast filter, so the only
- multicast setting is to receive all multicast frames. At least
- the chip has a very clean way to set the mode, unlike many others. */
- static void set_rx_mode(struct net_device *dev)
- {
- int ioaddr = dev->base_addr;
- short new_mode;
- if (dev->flags & IFF_PROMISC) {
- if (corkscrew_debug > 3)
- printk("%s: Setting promiscuous mode.n",
- dev->name);
- new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
- } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) {
- new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
- } else
- new_mode = SetRxFilter | RxStation | RxBroadcast;
- outw(new_mode, ioaddr + EL3_CMD);
- }
- /**
- * netdev_ethtool_ioctl: Handle network interface SIOCETHTOOL ioctls
- * @dev: network interface on which out-of-band action is to be performed
- * @useraddr: userspace address to which data is to be read and returned
- *
- * Process the various commands of the SIOCETHTOOL interface.
- */
- static int netdev_ethtool_ioctl (struct net_device *dev, void *useraddr)
- {
- u32 ethcmd;
- /* dev_ioctl() in ../../net/core/dev.c has already checked
- capable(CAP_NET_ADMIN), so don't bother with that here. */
- if (get_user(ethcmd, (u32 *)useraddr))
- return -EFAULT;
- switch (ethcmd) {
- case ETHTOOL_GDRVINFO: {
- struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
- strcpy (info.driver, DRV_NAME);
- strcpy (info.version, DRV_VERSION);
- sprintf(info.bus_info, "ISA 0x%lx", dev->base_addr);
- if (copy_to_user (useraddr, &info, sizeof (info)))
- return -EFAULT;
- return 0;
- }
- /* get message-level */
- case ETHTOOL_GMSGLVL: {
- struct ethtool_value edata = {ETHTOOL_GMSGLVL};
- edata.data = corkscrew_debug;
- if (copy_to_user(useraddr, &edata, sizeof(edata)))
- return -EFAULT;
- return 0;
- }
- /* set message-level */
- case ETHTOOL_SMSGLVL: {
- struct ethtool_value edata;
- if (copy_from_user(&edata, useraddr, sizeof(edata)))
- return -EFAULT;
- corkscrew_debug = edata.data;
- return 0;
- }
- default:
- break;
- }
- return -EOPNOTSUPP;
- }
- /**
- * netdev_ioctl: Handle network interface ioctls
- * @dev: network interface on which out-of-band action is to be performed
- * @rq: user request data
- * @cmd: command issued by user
- *
- * Process the various out-of-band ioctls passed to this driver.
- */
- static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
- {
- int rc = 0;
- switch (cmd) {
- case SIOCETHTOOL:
- rc = netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
- break;
- default:
- rc = -EOPNOTSUPP;
- break;
- }
- return rc;
- }
-
- #ifdef MODULE
- void cleanup_module(void)
- {
- struct net_device *next_dev;
- /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
- while (root_corkscrew_dev) {
- next_dev =
- ((struct corkscrew_private *) root_corkscrew_dev->
- priv)->next_module;
- if (root_corkscrew_dev->dma)
- free_dma(root_corkscrew_dev->dma);
- unregister_netdev(root_corkscrew_dev);
- outw(TotalReset, root_corkscrew_dev->base_addr + EL3_CMD);
- release_region(root_corkscrew_dev->base_addr,
- CORKSCREW_TOTAL_SIZE);
- kfree(root_corkscrew_dev);
- root_corkscrew_dev = next_dev;
- }
- }
- #endif /* MODULE */
- /*
- * Local variables:
- * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c515.c"
- * c-indent-level: 4
- * tab-width: 4
- * End:
- */