--- /dev/null
+/*
+ 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
+
+
+ 2000/2/2- 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.
+
+ 2001/11/17 - Added ethtool support (jgarzik)
+
+ 2002/10/28 - Locking updates for 2.5 (alan@lxorguk.ukuu.org.uk)
+
+*/
+
+#define DRV_NAME "3c515"
+#define DRV_VERSION "0.99t-ac"
+#define DRV_RELDATE "28-Oct-2002"
+
+static char *version =
+DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and others\n";
+
+#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 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/module.h>
+#include <linux/isapnp.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/in.h>
+#include <linux/ioport.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#define NEW_MULTICAST
+#include <linux/delay.h>
+
+#define MAX_UNITS 8
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
+/* "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 ((4*HZ)/10) /* 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,
+};
+enum wn3_config {
+ Ram_size = 7,
+ Ram_width = 8,
+ Ram_speed = 0x30,
+ Rom_size = 0xc0,
+ Ram_split_shift = 16,
+ Ram_split = 3 << Ram_split_shift,
+ Xcvr_shift = 20,
+ Xcvr = 7 << Xcvr_shift,
+ Autoselect = 0x1000000,
+};
+
+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 list_head list;
+ struct net_device *our_dev;
+ /* 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 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;
+ spinlock_t lock;
+ struct device *dev;
+};
+
+/* 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 __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 nopnp;
+#endif /* __ISAPNP__ */
+
+static struct net_device *corkscrew_scan(int unit);
+static int corkscrew_setup(struct net_device *dev, int ioaddr,
+ struct pnp_dev *idev, int card_number);
+static int corkscrew_open(struct net_device *dev);
+static void corkscrew_timer(unsigned long arg);
+static netdev_tx_t 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 irqreturn_t corkscrew_interrupt(int irq, void *dev_id);
+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 const struct ethtool_ops netdev_ethtool_ops;
+
+
+/*
+ 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[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
+
+#ifdef MODULE
+static int debug = -1;
+
+module_param(debug, int, 0);
+module_param_array(options, int, NULL, 0);
+module_param(rx_copybreak, int, 0);
+module_param(max_interrupt_work, int, 0);
+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");
+
+/* A list of all installed Vortex devices, for removing the driver module. */
+/* we will need locking (and refcounting) if we ever use it for more */
+static LIST_HEAD(root_corkscrew_dev);
+
+int init_module(void)
+{
+ int found = 0;
+ if (debug >= 0)
+ corkscrew_debug = debug;
+ if (corkscrew_debug)
+ pr_debug("%s", version);
+ while (corkscrew_scan(-1))
+ found++;
+ return found ? 0 : -ENODEV;
+}
+
+#else
+struct net_device *tc515_probe(int unit)
+{
+ struct net_device *dev = corkscrew_scan(unit);
+ static int printed;
+
+ if (!dev)
+ return ERR_PTR(-ENODEV);
+
+ if (corkscrew_debug > 0 && !printed) {
+ printed = 1;
+ pr_debug("%s", version);
+ }
+
+ return dev;
+}
+#endif /* not MODULE */
+
+static int check_device(unsigned ioaddr)
+{
+ int timer;
+
+ if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515"))
+ return 0;
+ /* Check the resource configuration for a matching ioaddr. */
+ if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) {
+ release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
+ return 0;
+ }
+ /* Verify by reading the device ID from the EEPROM. */
+ 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) {
+ release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
+ return 0;
+ }
+ return 1;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+ struct corkscrew_private *vp = netdev_priv(dev);
+ list_del_init(&vp->list);
+ if (dev->dma)
+ free_dma(dev->dma);
+ outw(TotalReset, dev->base_addr + EL3_CMD);
+ release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE);
+ if (vp->dev)
+ pnp_device_detach(to_pnp_dev(vp->dev));
+}
+
+static struct net_device *corkscrew_scan(int unit)
+{
+ struct net_device *dev;
+ static int cards_found = 0;
+ static int ioaddr;
+ int err;
+#ifdef __ISAPNP__
+ short i;
+ static int pnp_cards;
+#endif
+
+ dev = alloc_etherdev(sizeof(struct corkscrew_private));
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ if (unit >= 0) {
+ sprintf(dev->name, "eth%d", unit);
+ netdev_boot_setup_check(dev);
+ }
+
+#ifdef __ISAPNP__
+ if(nopnp == 1)
+ goto no_pnp;
+ for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
+ struct pnp_dev *idev = NULL;
+ int irq;
+ while((idev = pnp_find_dev(NULL,
+ corkscrew_isapnp_adapters[i].vendor,
+ corkscrew_isapnp_adapters[i].function,
+ idev))) {
+
+ if (pnp_device_attach(idev) < 0)
+ continue;
+ if (pnp_activate_dev(idev) < 0) {
+ pr_warn("pnp activate failed (out of resources?)\n");
+ pnp_device_detach(idev);
+ continue;
+ }
+ if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
+ pnp_device_detach(idev);
+ continue;
+ }
+ ioaddr = pnp_port_start(idev, 0);
+ irq = pnp_irq(idev, 0);
+ if (!check_device(ioaddr)) {
+ pnp_device_detach(idev);
+ continue;
+ }
+ if(corkscrew_debug)
+ pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n",
+ (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
+ pr_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 */
+ SET_NETDEV_DEV(dev, &idev->dev);
+ pnp_cards++;
+ err = corkscrew_setup(dev, ioaddr, idev, cards_found++);
+ if (!err)
+ return dev;
+ cleanup_card(dev);
+ }
+ }
+no_pnp:
+#endif /* __ISAPNP__ */
+
+ /* Check all locations on the ISA bus -- evil! */
+ for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
+ if (!check_device(ioaddr))
+ continue;
+
+ pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
+ inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
+ err = corkscrew_setup(dev, ioaddr, NULL, cards_found++);
+ if (!err)
+ return dev;
+ cleanup_card(dev);
+ }
+ free_netdev(dev);
+ return NULL;
+}
+
+
+static const struct net_device_ops netdev_ops = {
+ .ndo_open = corkscrew_open,
+ .ndo_stop = corkscrew_close,
+ .ndo_start_xmit = corkscrew_start_xmit,
+ .ndo_tx_timeout = corkscrew_timeout,
+ .ndo_get_stats = corkscrew_get_stats,
+ .ndo_set_rx_mode = set_rx_mode,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+
+static int corkscrew_setup(struct net_device *dev, int ioaddr,
+ struct pnp_dev *idev, int card_number)
+{
+ struct corkscrew_private *vp = netdev_priv(dev);
+ unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
+ int i;
+ int irq;
+
+#ifdef __ISAPNP__
+ if (idev) {
+ irq = pnp_irq(idev, 0);
+ vp->dev = &idev->dev;
+ } else {
+ irq = inw(ioaddr + 0x2002) & 15;
+ }
+#else
+ irq = inw(ioaddr + 0x2002) & 15;
+#endif
+
+ dev->base_addr = ioaddr;
+ dev->irq = irq;
+ dev->dma = inw(ioaddr + 0x2000) & 7;
+ vp->product_name = "3c515";
+ vp->options = dev->mem_start;
+ vp->our_dev = dev;
+
+ if (!vp->options) {
+ if (card_number >= MAX_UNITS)
+ vp->options = -1;
+ else
+ vp->options = options[card_number];
+ }
+
+ if (vp->options >= 0) {
+ vp->media_override = vp->options & 7;
+ if (vp->media_override == 2)
+ vp->media_override = 0;
+ vp->full_duplex = (vp->options & 8) ? 1 : 0;
+ vp->bus_master = (vp->options & 16) ? 1 : 0;
+ } else {
+ vp->media_override = 7;
+ vp->full_duplex = 0;
+ vp->bus_master = 0;
+ }
+#ifdef MODULE
+ list_add(&vp->list, &root_corkscrew_dev);
+#endif
+
+ pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
+
+ spin_lock_init(&vp->lock);
+
+ /* Read the station address from the EEPROM. */
+ EL3WINDOW(0);
+ for (i = 0; i < 0x18; i++) {
+ __be16 *phys_addr = (__be16 *) 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)
+ pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
+ pr_cont(" %pM", dev->dev_addr);
+ if (eeprom[16] == 0x11c7) { /* Corkscrew */
+ if (request_dma(dev->dma, "3c515")) {
+ pr_cont(", DMA %d allocation failed", dev->dma);
+ dev->dma = 0;
+ } else
+ pr_cont(", DMA %d", dev->dma);
+ }
+ pr_cont(", IRQ %d\n", dev->irq);
+ /* Tell them about an invalid IRQ. */
+ if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
+ pr_warn(" *** Warning: this IRQ is unlikely to work! ***\n");
+
+ {
+ static const char * const ram_split[] = {
+ "5:3", "3:1", "1:1", "3:5"
+ };
+ __u32 config;
+ EL3WINDOW(3);
+ vp->available_media = inw(ioaddr + Wn3_Options);
+ config = inl(ioaddr + Wn3_Config);
+ if (corkscrew_debug > 1)
+ pr_info(" Internal config register is %4.4x, transceivers %#x.\n",
+ config, inw(ioaddr + Wn3_Options));
+ pr_info(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
+ 8 << config & Ram_size,
+ config & Ram_width ? "word" : "byte",
+ ram_split[(config & Ram_split) >> Ram_split_shift],
+ config & Autoselect ? "autoselect/" : "",
+ media_tbl[(config & Xcvr) >> Xcvr_shift].name);
+ vp->default_media = (config & Xcvr) >> Xcvr_shift;
+ vp->autoselect = config & Autoselect ? 1 : 0;
+ dev->if_port = vp->default_media;
+ }
+ if (vp->media_override != 7) {
+ pr_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;
+
+ /* The 3c51x-specific entries in the device structure. */
+ dev->netdev_ops = &netdev_ops;
+ dev->watchdog_timeo = (400 * HZ) / 1000;
+ dev->ethtool_ops = &netdev_ethtool_ops;
+
+ return register_netdev(dev);
+}
+
+
+static int corkscrew_open(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ struct corkscrew_private *vp = netdev_priv(dev);
+ __u32 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 = inl(ioaddr + Wn3_Config);
+
+ if (vp->media_override != 7) {
+ if (corkscrew_debug > 1)
+ pr_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)
+ pr_debug("%s: Initial media type %s.\n",
+ dev->name, media_tbl[dev->if_port].name);
+
+ init_timer(&vp->timer);
+ vp->timer.expires = jiffies + 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 = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
+ outl(config, ioaddr + Wn3_Config);
+
+ if (corkscrew_debug > 1) {
+ pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n",
+ dev->name, config);
+ }
+
+ 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, IRQF_SHARED,
+ vp->product_name, dev)) {
+ return -EAGAIN;
+ }
+
+ if (corkscrew_debug > 1) {
+ EL3WINDOW(4);
+ pr_debug("%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)
+ pr_debug("%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 =
+ isa_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 = netdev_alloc_skb(dev, PKT_BUF_SZ);
+ vp->rx_skbuff[i] = skb;
+ if (skb == NULL)
+ break; /* Bad news! */
+ skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
+ vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
+ }
+ if (i != 0)
+ vp->rx_ring[i - 1].next =
+ isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
+ outl(isa_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] = NULL;
+ 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 = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+ unsigned long flags;
+ int ok = 0;
+
+ if (corkscrew_debug > 1)
+ pr_debug("%s: Media selection timer tick happened, %s.\n",
+ dev->name, media_tbl[dev->if_port].name);
+
+ spin_lock_irqsave(&vp->lock, flags);
+
+ {
+ 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)
+ pr_debug("%s: Media %s has link beat, %x.\n",
+ dev->name,
+ media_tbl[dev->if_port].name,
+ media_status);
+ } else if (corkscrew_debug > 1)
+ pr_debug("%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)
+ pr_debug("%s: Media %s is has no indication, %x.\n",
+ dev->name,
+ media_tbl[dev->if_port].name,
+ media_status);
+ ok = 1;
+ }
+ if (!ok) {
+ __u32 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)
+ pr_debug("%s: Media selection failing, using default %s port.\n",
+ dev->name,
+ media_tbl[dev->if_port].name);
+ } else {
+ if (corkscrew_debug > 1)
+ pr_debug("%s: Media selection failed, now trying %s port.\n",
+ dev->name,
+ media_tbl[dev->if_port].name);
+ vp->timer.expires = jiffies + 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 = inl(ioaddr + Wn3_Config);
+ config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
+ outl(config, ioaddr + Wn3_Config);
+
+ outw(dev->if_port == 3 ? StartCoax : StopCoax,
+ ioaddr + EL3_CMD);
+ }
+ EL3WINDOW(old_window);
+ }
+
+ spin_unlock_irqrestore(&vp->lock, flags);
+ if (corkscrew_debug > 1)
+ pr_debug("%s: Media selection timer finished, %s.\n",
+ dev->name, media_tbl[dev->if_port].name);
+
+#endif /* AUTOMEDIA */
+}
+
+static void corkscrew_timeout(struct net_device *dev)
+{
+ int i;
+ struct corkscrew_private *vp = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+
+ pr_warn("%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)
+ pr_warn("%s: Transmitter encountered 16 collisions -- network cable problem?\n",
+ dev->name);
+#ifndef final_version
+ pr_debug(" 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);
+ pr_debug(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
+ &vp->tx_ring[0]);
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ pr_debug(" %d: %p length %8.8x status %8.8x\n", 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; /* prevent tx timeout */
+ dev->stats.tx_errors++;
+ dev->stats.tx_dropped++;
+ netif_wake_queue(dev);
+}
+
+static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct corkscrew_private *vp = netdev_priv(dev);
+ 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;
+ int i;
+
+ if (vp->tx_full) /* No room to transmit with */
+ return NETDEV_TX_BUSY;
+ 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)
+ pr_debug("%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 = isa_virt_to_bus(skb->data);
+ vp->tx_ring[entry].length = skb->len | 0x80000000;
+ vp->tx_ring[entry].status = skb->len | 0x80000000;
+
+ spin_lock_irqsave(&vp->lock, flags);
+ 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 = isa_virt_to_bus(&vp->tx_ring[entry]);
+ if (inl(ioaddr + DownListPtr) == 0) {
+ outl(isa_virt_to_bus(&vp->tx_ring[entry]),
+ ioaddr + DownListPtr);
+ queued_packet++;
+ }
+ outw(DownUnstall, ioaddr + EL3_CMD);
+ spin_unlock_irqrestore(&vp->lock, 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);
+ }
+ return NETDEV_TX_OK;
+ }
+ /* Put out the doubleword header... */
+ outl(skb->len, ioaddr + TX_FIFO);
+ dev->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 */
+
+
+ /* 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)
+ pr_debug("%s: Tx error, status %2.2x.\n",
+ dev->name, tx_status);
+ if (tx_status & 0x04)
+ dev->stats.tx_fifo_errors++;
+ if (tx_status & 0x38)
+ dev->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 NETDEV_TX_OK;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+ after the Tx thread. */
+
+static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
+{
+ /* Use the now-standard shared IRQ implementation. */
+ struct net_device *dev = dev_id;
+ struct corkscrew_private *lp = netdev_priv(dev);
+ int ioaddr, status;
+ int latency;
+ int i = max_interrupt_work;
+
+ ioaddr = dev->base_addr;
+ latency = inb(ioaddr + Timer);
+
+ spin_lock(&lp->lock);
+
+ status = inw(ioaddr + EL3_STATUS);
+
+ if (corkscrew_debug > 4)
+ pr_debug("%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) {
+ pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
+ dev->name, status, netif_running(dev));
+ free_irq(dev->irq, dev);
+ dev->irq = -1;
+ }
+ }
+
+ do {
+ if (corkscrew_debug > 5)
+ pr_debug("%s: In interrupt loop, status %4.4x.\n",
+ dev->name, status);
+ if (status & RxComplete)
+ corkscrew_rx(dev);
+
+ if (status & TxAvailable) {
+ if (corkscrew_debug > 5)
+ pr_debug(" 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) == isa_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] = NULL;
+ }
+ 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)
+ pr_debug("%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;
+ pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n",
+ dev->name);
+ for (win = 0; win < 8; win++) {
+ EL3WINDOW(win);
+ pr_notice("Vortex window %d:", win);
+ for (reg = 0; reg < 16; reg++)
+ pr_cont(" %2.2x", inb(ioaddr + reg));
+ pr_cont("\n");
+ }
+ 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) {
+ pr_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));
+
+ spin_unlock(&lp->lock);
+
+ if (corkscrew_debug > 4)
+ pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
+ return IRQ_HANDLED;
+}
+
+static int corkscrew_rx(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr;
+ int i;
+ short rx_status;
+
+ if (corkscrew_debug > 5)
+ pr_debug(" 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)
+ pr_debug(" Rx error: status %2.2x.\n",
+ rx_error);
+ dev->stats.rx_errors++;
+ if (rx_error & 0x01)
+ dev->stats.rx_over_errors++;
+ if (rx_error & 0x02)
+ dev->stats.rx_length_errors++;
+ if (rx_error & 0x04)
+ dev->stats.rx_frame_errors++;
+ if (rx_error & 0x08)
+ dev->stats.rx_crc_errors++;
+ if (rx_error & 0x10)
+ dev->stats.rx_length_errors++;
+ } else {
+ /* The packet length: up to 4.5K!. */
+ short pkt_len = rx_status & 0x1fff;
+ struct sk_buff *skb;
+
+ skb = netdev_alloc_skb(dev, pkt_len + 5 + 2);
+ if (corkscrew_debug > 4)
+ pr_debug("Receiving packet size %d status %4.4x.\n",
+ pkt_len, rx_status);
+ if (skb != NULL) {
+ 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->stats.rx_packets++;
+ dev->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)
+ pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
+ }
+ outw(RxDiscard, ioaddr + EL3_CMD);
+ dev->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 = netdev_priv(dev);
+ int entry = vp->cur_rx % RX_RING_SIZE;
+ int ioaddr = dev->base_addr;
+ int rx_status;
+
+ if (corkscrew_debug > 5)
+ pr_debug(" 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)
+ pr_debug(" Rx error: status %2.2x.\n",
+ rx_error);
+ dev->stats.rx_errors++;
+ if (rx_error & 0x01)
+ dev->stats.rx_over_errors++;
+ if (rx_error & 0x02)
+ dev->stats.rx_length_errors++;
+ if (rx_error & 0x04)
+ dev->stats.rx_frame_errors++;
+ if (rx_error & 0x08)
+ dev->stats.rx_crc_errors++;
+ if (rx_error & 0x10)
+ dev->stats.rx_length_errors++;
+ } else {
+ /* The packet length: up to 4.5K!. */
+ short pkt_len = rx_status & 0x1fff;
+ struct sk_buff *skb;
+
+ dev->stats.rx_bytes += pkt_len;
+ if (corkscrew_debug > 4)
+ pr_debug("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 = netdev_alloc_skb(dev, pkt_len + 4)) != NULL) {
+ 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),
+ isa_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 (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
+ pr_warn("%s: Warning -- the skbuff addresses do not match in boomerang_rx: %p vs. %p / %p\n",
+ dev->name,
+ isa_bus_to_virt(vp->rx_ring[entry].addr),
+ skb->head, temp);
+ rx_nocopy++;
+ }
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->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 = netdev_alloc_skb(dev, PKT_BUF_SZ);
+ if (skb == NULL)
+ break; /* Bad news! */
+ skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
+ vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
+ 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 = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+ int i;
+
+ netif_stop_queue(dev);
+
+ if (corkscrew_debug > 1) {
+ pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
+ dev->name, inw(ioaddr + EL3_STATUS),
+ inb(ioaddr + TxStatus));
+ pr_debug("%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] = NULL;
+ }
+ }
+ 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] = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
+{
+ struct corkscrew_private *vp = netdev_priv(dev);
+ unsigned long flags;
+
+ if (netif_running(dev)) {
+ spin_lock_irqsave(&vp->lock, flags);
+ update_stats(dev->base_addr, dev);
+ spin_unlock_irqrestore(&vp->lock, flags);
+ }
+ return &dev->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)
+{
+ /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
+ /* Switch to the stats window, and read everything. */
+ EL3WINDOW(6);
+ dev->stats.tx_carrier_errors += inb(ioaddr + 0);
+ dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
+ /* Multiple collisions. */ inb(ioaddr + 2);
+ dev->stats.collisions += inb(ioaddr + 3);
+ dev->stats.tx_window_errors += inb(ioaddr + 4);
+ dev->stats.rx_fifo_errors += inb(ioaddr + 5);
+ dev->stats.tx_packets += inb(ioaddr + 6);
+ dev->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);
+}
+
+/* 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)
+ pr_debug("%s: Setting promiscuous mode.\n",
+ dev->name);
+ new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
+ } else if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) {
+ new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
+ } else
+ new_mode = SetRxFilter | RxStation | RxBroadcast;
+
+ outw(new_mode, ioaddr + EL3_CMD);
+}
+
+static void netdev_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ snprintf(info->bus_info, sizeof(info->bus_info), "ISA 0x%lx",
+ dev->base_addr);
+}
+
+static u32 netdev_get_msglevel(struct net_device *dev)
+{
+ return corkscrew_debug;
+}
+
+static void netdev_set_msglevel(struct net_device *dev, u32 level)
+{
+ corkscrew_debug = level;
+}
+
+static const struct ethtool_ops netdev_ethtool_ops = {
+ .get_drvinfo = netdev_get_drvinfo,
+ .get_msglevel = netdev_get_msglevel,
+ .set_msglevel = netdev_set_msglevel,
+};
+
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+ while (!list_empty(&root_corkscrew_dev)) {
+ struct net_device *dev;
+ struct corkscrew_private *vp;
+
+ vp = list_entry(root_corkscrew_dev.next,
+ struct corkscrew_private, list);
+ dev = vp->our_dev;
+ unregister_netdev(dev);
+ cleanup_card(dev);
+ free_netdev(dev);
+ }
+}
+#endif /* MODULE */
Code Review / kvmfornfv.git / blobdiff