patch-2.0.34 linux/drivers/net/yellowfin.c
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- Lines: 1303
- Date:
Wed Jun 3 15:17:47 1998
- Orig file:
v2.0.33/linux/drivers/net/yellowfin.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.0.33/linux/drivers/net/yellowfin.c linux/drivers/net/yellowfin.c
@@ -0,0 +1,1302 @@
+/* yellowfin.c: A Packet Engines G-NIC ethernet driver for linux. */
+/*
+ Written 1997-1998 by Donald Becker.
+
+ This software may be used and distributed according to the terms
+ of the GNU Public License, incorporated herein by reference.
+
+ This driver is for the Packet Engines G-NIC PCI Gigabit Ethernet adapter.
+ It also supports the Symbios Logic version of the same chip core.
+
+ The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+ Center of Excellence in Space Data and Information Sciences
+ Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+ Support and updates available at
+ http://cesdis.gsfc.nasa.gov/linux/drivers/yellowfin.html
+*/
+
+static const char *version = "yellowfin.c:v0.99A 4/7/98 becker@cesdis.gsfc.nasa.gov\n";
+
+/* A few user-configurable values. */
+
+static int max_interrupt_work = 20;
+static int min_pci_latency = 64;
+static int mtu = 0;
+#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
+/* System-wide count of bogus-rx frames. */
+static int bogus_rx = 0;
+static int dma_ctrl = 0x004A0263; /* Constrained by errata */
+static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */
+#elif YF_NEW /* A future perfect board :->. */
+static int dma_ctrl = 0x00CAC277; /* Override when loading module! */
+static int fifo_cfg = 0x0028;
+#else
+static int dma_ctrl = 0x004A0263; /* Constrained by errata */
+static int fifo_cfg = 0x0020; /* Bypass external Tx FIFO. */
+#endif
+
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+ Setting to > 1518 effectively disables this feature. */
+static const rx_copybreak = 100;
+
+/* Keep the ring sizes a power of two for efficiency.
+ Making the Tx ring too large decreases the effectiveness of channel
+ bonding and packet priority.
+ There are no ill effects from too-large receive rings. */
+#define TX_RING_SIZE 16
+#define RX_RING_SIZE 32
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT ((2000*HZ)/1000)
+
+#include <linux/config.h>
+#ifdef MODULE
+#ifdef MODVERSIONS
+#include <linux/modversions.h>
+#endif
+#include <linux/module.h>
+#include <linux/version.h>
+#else
+#define MOD_INC_USE_COUNT
+#define MOD_DEC_USE_COUNT
+#endif
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/bios32.h>
+#include <asm/processor.h> /* Processor type for cache alignment. */
+#include <asm/bitops.h>
+#include <asm/io.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+/* Kernel compatibility defines, common to David Hind's PCMCIA package.
+ This is only in the support-all-kernels source code. */
+#include <linux/version.h> /* Evil, but neccessary */
+
+#if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10300
+#define RUN_AT(x) (x) /* What to put in timer->expires. */
+#define DEV_ALLOC_SKB(len) alloc_skb(len, GFP_ATOMIC)
+#define virt_to_bus(addr) ((unsigned long)addr)
+#define bus_to_virt(addr) ((void*)addr)
+
+#else /* 1.3.0 and later */
+#define RUN_AT(x) (jiffies + (x))
+#define DEV_ALLOC_SKB(len) dev_alloc_skb(len + 2)
+#endif
+
+#if defined (LINUX_VERSION_CODE) && LINUX_VERSION_CODE < 0x10338
+#ifdef MODULE
+#if !defined(CONFIG_MODVERSIONS) && !defined(__NO_VERSION__)
+char kernel_version[] = UTS_RELEASE;
+#endif
+#else
+#undef MOD_INC_USE_COUNT
+#define MOD_INC_USE_COUNT
+#undef MOD_DEC_USE_COUNT
+#define MOD_DEC_USE_COUNT
+#endif
+#endif /* 1.3.38 */
+
+#if (LINUX_VERSION_CODE >= 0x10344)
+#define NEW_MULTICAST
+#include <linux/delay.h>
+#endif
+#if (LINUX_VERSION_CODE >= 0x20100)
+char kernel_version[] = UTS_RELEASE;
+#endif
+#ifdef SA_SHIRQ
+#define IRQ(irq, dev_id, pt_regs) (irq, dev_id, pt_regs)
+#else
+#define IRQ(irq, dev_id, pt_regs) (irq, pt_regs)
+#endif
+#if (LINUX_VERSION_CODE < 0x20123)
+#define test_and_set_bit(val, addr) set_bit(val, addr)
+#endif
+
+static const char *card_name = "Yellowfin G-NIC Gbit Ethernet";
+
+/* The PCI I/O space extent. */
+#define YELLOWFIN_TOTAL_SIZE 0x100
+
+#ifdef HAVE_DEVLIST
+struct netdev_entry yellowfin_drv =
+{card_name, yellowfin_pci_probe, YELLOWFIN_TOTAL_SIZE, NULL};
+#endif
+
+#ifdef YELLOWFIN_DEBUG
+int yellowfin_debug = YELLOWFIN_DEBUG;
+#else
+int yellowfin_debug = 1;
+#endif
+
+/*
+ Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the Packet Engines "Yellowfin" Gigabit
+Ethernet adapter. The only PCA currently supported is the G-NIC 64-bit
+PCI card.
+
+II. Board-specific settings
+
+PCI bus devices are configured by the system at boot time, so no jumpers
+need to be set on the board. The system BIOS preferably should assign the
+PCI INTA signal to an otherwise unused system IRQ line.
+Note: Kernel versions earlier than 1.3.73 do not support shared PCI
+interrupt lines.
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+The Yellowfin uses the Descriptor Based DMA Architecture specified by Apple.
+This is a descriptor list scheme similar to that used by the EEPro100 and
+Tulip. This driver uses two statically allocated fixed-size descriptor lists
+formed into rings by a branch from the final descriptor to the beginning of
+the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
+
+The driver allocates full frame size skbuffs for the Rx ring buffers at
+open() time and passes the skb->data field to the Yellowfin as receive data
+buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
+a fresh skbuff is allocated and the frame is copied to the new skbuff.
+When the incoming frame is larger, the skbuff is passed directly up the
+protocol stack and replaced by a newly allocated skbuff.
+
+The RX_COPYBREAK value is chosen to trade-off the memory wasted by
+using a full-sized skbuff for small frames vs. the copying costs of larger
+frames. For small frames the copying cost is negligible (esp. considering
+that we are pre-loading the cache with immediately useful header
+information). For large frames the copying cost is non-trivial, and the
+larger copy might flush the cache of useful data.
+
+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
+dev->tbusy flag. The other thread is the interrupt handler, which is single
+threaded by the hardware and other software.
+
+The send packet thread has partial control over the Tx ring and 'dev->tbusy'
+flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
+queue slot is empty, it clears the tbusy flag when finished otherwise it sets
+the 'yp->tx_full' flag.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring. After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. Iff the 'yp->tx_full' flag is set, it
+clears both the tx_full and tbusy flags.
+
+IV. Notes
+
+Thanks to Kim Stearns of Packet Engines for providing a pair of G-NIC boards.
+
+IVb. References
+
+Yellowfin Engineering Design Specification, 4/23/97 Preliminary/Confidential
+http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html
+
+IVc. Errata
+
+See Packet Engines confidential appendix.
+
+*/
+
+/* A few values that may be tweaked. */
+#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
+
+#ifndef PCI_VENDOR_ID_PKT_ENG /* To be defined in linux/pci.h */
+#define PCI_VENDOR_ID_PKT_ENG 0x1000 /* Hmm, likely number.. */
+#define PCI_DEVICE_ID_YELLOWFIN 0x0702
+#endif
+
+/* The rest of these values should never change. */
+
+static void yellowfin_timer(unsigned long data);
+
+/* Offsets to the Yellowfin registers. Various sizes and alignments. */
+enum yellowfin_offsets {
+ TxCtrl=0x00, TxStatus=0x04, TxPtr=0x0C,
+ TxIntrSel=0x10, TxBranchSel=0x14, TxWaitSel=0x18,
+ RxCtrl=0x40, RxStatus=0x44, RxPtr=0x4C,
+ RxIntrSel=0x50, RxBranchSel=0x54, RxWaitSel=0x58,
+ EventStatus=0x80, IntrEnb=0x82, IntrClear=0x84, IntrStatus=0x86,
+ ChipRev=0x8C, DMACtrl=0x90, Cnfg=0xA0, RxDepth=0xB8, FlowCtrl=0xBC,
+ AddrMode=0xD0, StnAddr=0xD2, HashTbl=0xD8, FIFOcfg=0xF8,
+};
+
+/* The Yellowfin Rx and Tx buffer descriptors. */
+struct yellowfin_desc {
+ u16 request_cnt;
+ u16 cmd;
+ u32 addr;
+ u32 branch_addr;
+ u16 result_cnt;
+ u16 status;
+};
+
+struct tx_status_words {
+ u16 tx_cnt;
+ u16 tx_errs;
+ u16 total_tx_cnt;
+ u16 paused;
+};
+
+/* Bits in yellowfin_desc.cmd */
+enum desc_cmd_bits {
+ CMD_TX_PKT=0x1000, CMD_RX_BUF=0x2000, CMD_TXSTATUS=0x3000,
+ CMD_NOP=0x6000, CMD_STOP=0x7000,
+ BRANCH_ALWAYS=0x0C, INTR_ALWAYS=0x30, WAIT_ALWAYS=0x03,
+ BRANCH_IFTRUE=0x04,
+};
+
+/* Bits in yellowfin_desc.status */
+enum desc_status_bits { RX_EOP=0x0040, };
+
+/* Bits in the interrupt status/mask registers. */
+enum intr_status_bits {
+ IntrRxDone=0x01, IntrRxInvalid=0x02, IntrRxPCIFault=0x04,IntrRxPCIErr=0x08,
+ IntrTxDone=0x10, IntrTxInvalid=0x20, IntrTxPCIFault=0x40,IntrTxPCIErr=0x80,
+ IntrEarlyRx=0x100, IntrWakeup=0x200, };
+
+struct yellowfin_private {
+ /* Descriptor rings first for alignment. Tx requires a second descriptor
+ for status. */
+ struct yellowfin_desc rx_ring[RX_RING_SIZE];
+ struct yellowfin_desc tx_ring[TX_RING_SIZE*2];
+ const char *product_name;
+ struct device *next_module;
+ /* The saved address of a sent-in-place packet/buffer, for skfree(). */
+ struct sk_buff* tx_skbuff[TX_RING_SIZE];
+ struct tx_status_words tx_status[TX_RING_SIZE];
+ /* The addresses of receive-in-place skbuffs. */
+ struct sk_buff* rx_skbuff[RX_RING_SIZE];
+ int chip_id;
+ struct enet_statistics stats;
+ struct timer_list timer; /* Media selection timer. */
+ int in_interrupt;
+ unsigned int cur_rx, cur_tx; /* The next free ring entry */
+ unsigned int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
+ unsigned int tx_full:1; /* The Tx queue is full. */
+ unsigned int full_duplex:1; /* Full-duplex operation requested. */
+ unsigned int medialock:1; /* Do not sense media. */
+ unsigned int default_port:4; /* Last dev->if_port value. */
+ u32 pad[4]; /* Used for 32-byte alignment */
+};
+
+#ifdef MODULE
+/* Used to pass the media type, etc. */
+#define MAX_UNITS 8 /* More are supported, limit only on options */
+static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+
+#if LINUX_VERSION_CODE > 0x20115
+MODULE_AUTHOR("Donald Becker <becker@cesdis.gsfc.nasa.gov>");
+MODULE_DESCRIPTION("Packet Engines Yellowfin G-NIC Gigabit Ethernet driver");
+MODULE_PARM(max_interrupt_work, "i");
+MODULE_PARM(min_pci_latency, "i");
+MODULE_PARM(mtu, "i");
+MODULE_PARM(debug, "i");
+MODULE_PARM(rx_copybreak, "i");
+MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
+#endif
+
+#endif
+
+static struct device *yellowfin_probe1(struct device *dev, int ioaddr, int irq,
+ int chip_id, int options);
+static int yellowfin_open(struct device *dev);
+static void yellowfin_timer(unsigned long data);
+static void yellowfin_tx_timeout(struct device *dev);
+static void yellowfin_init_ring(struct device *dev);
+static int yellowfin_start_xmit(struct sk_buff *skb, struct device *dev);
+static int yellowfin_rx(struct device *dev);
+static void yellowfin_interrupt IRQ(int irq, void *dev_instance, struct pt_regs *regs);
+static int yellowfin_close(struct device *dev);
+static struct enet_statistics *yellowfin_get_stats(struct device *dev);
+#ifdef NEW_MULTICAST
+static void set_rx_mode(struct device *dev);
+#else
+static void set_rx_mode(struct device *dev, int num_addrs, void *addrs);
+#endif
+
+
+
+#ifdef MODULE
+/* A list of all installed Yellowfin devices, for removing the driver module. */
+static struct device *root_yellowfin_dev = NULL;
+#endif
+
+int yellowfin_probe(struct device *dev)
+{
+ int cards_found = 0;
+ static int pci_index = 0; /* Static, for multiple probe calls. */
+
+ /* Ideally we would detect all network cards in slot order. That would
+ be best done a central PCI probe dispatch, which wouldn't work
+ well with the current structure. So instead we detect just the
+ Yellowfin cards in slot order. */
+
+ if (pcibios_present()) {
+ unsigned char pci_bus, pci_device_fn;
+
+ for (;pci_index < 0xff; pci_index++) {
+ u8 pci_irq_line, pci_latency;
+ u16 pci_command, vendor, device;
+ u32 pci_ioaddr, chip_idx = 0;
+
+#ifdef REVERSE_PROBE_ORDER
+ if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8,
+ 0xfe - pci_index,
+ &pci_bus, &pci_device_fn)
+ != PCIBIOS_SUCCESSFUL)
+ continue;
+#else
+ if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8,
+ pci_index,
+ &pci_bus, &pci_device_fn)
+ != PCIBIOS_SUCCESSFUL)
+ break;
+#endif
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_VENDOR_ID, &vendor);
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_DEVICE_ID, &device);
+ pcibios_read_config_byte(pci_bus, pci_device_fn,
+ PCI_INTERRUPT_LINE, &pci_irq_line);
+ pcibios_read_config_dword(pci_bus, pci_device_fn,
+ PCI_BASE_ADDRESS_0, &pci_ioaddr);
+ /* Remove I/O space marker in bit 0. */
+ pci_ioaddr &= ~3;
+
+ if (vendor != PCI_VENDOR_ID_PKT_ENG)
+ continue;
+
+ if (device != PCI_DEVICE_ID_YELLOWFIN)
+ continue;
+
+ if (yellowfin_debug > 2)
+ printk("Found Packet Engines Yellowfin G-NIC at I/O %#x, IRQ %d.\n",
+ pci_ioaddr, pci_irq_line);
+
+ if (check_region(pci_ioaddr, YELLOWFIN_TOTAL_SIZE))
+ continue;
+
+#ifdef MODULE
+ dev = yellowfin_probe1(dev, pci_ioaddr, pci_irq_line, chip_idx,
+ cards_found < MAX_UNITS ? options[cards_found] : 0);
+#else
+ dev = yellowfin_probe1(dev, pci_ioaddr, pci_irq_line, chip_idx,
+ dev ? dev->mem_start : 0);
+#endif
+
+ if (dev) {
+ /* Get and check the bus-master and latency values. */
+ pcibios_read_config_word(pci_bus, pci_device_fn,
+ PCI_COMMAND, &pci_command);
+ if ( ! (pci_command & PCI_COMMAND_MASTER)) {
+ printk(" PCI Master Bit has not been set! Setting...\n");
+ pci_command |= PCI_COMMAND_MASTER;
+ pcibios_write_config_word(pci_bus, pci_device_fn,
+ PCI_COMMAND, pci_command);
+ }
+ pcibios_read_config_byte(pci_bus, pci_device_fn,
+ PCI_LATENCY_TIMER, &pci_latency);
+ if (pci_latency < min_pci_latency) {
+ printk(" PCI latency timer (CFLT) is unreasonably low at %d."
+ " Setting to %d clocks.\n",
+ pci_latency, min_pci_latency);
+ pcibios_write_config_byte(pci_bus, pci_device_fn,
+ PCI_LATENCY_TIMER, min_pci_latency);
+ } else if (yellowfin_debug > 1)
+ printk(" PCI latency timer (CFLT) is %#x.\n", pci_latency);
+ dev = 0;
+ cards_found++;
+ }
+ }
+ }
+
+#if defined (MODULE)
+ return cards_found;
+#else
+ return 0;
+#endif
+}
+
+static struct device *yellowfin_probe1(struct device *dev, int ioaddr, int irq,
+ int chip_id, int options)
+{
+ static int did_version = 0; /* Already printed version info. */
+ struct yellowfin_private *yp;
+ int i;
+
+ if (yellowfin_debug > 0 && did_version++ == 0)
+ printk(version);
+
+ dev = init_etherdev(dev, sizeof(struct yellowfin_private));
+
+ printk("%s: P-E Yellowfin type %8x at %#3x, ",
+ dev->name, inl(ioaddr + ChipRev), ioaddr);
+
+ for (i = 0; i < 5; i++)
+ printk("%2.2x:", inb(ioaddr + StnAddr + i));
+ printk("%2.2x, IRQ %d.\n", inb(ioaddr + StnAddr + i), irq);
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = inb(ioaddr + StnAddr + i);
+
+ /* Reset the chip. */
+ outl(0x80000000, ioaddr + DMACtrl);
+
+
+ /* We do a request_region() only to register /proc/ioports info. */
+ request_region(ioaddr, YELLOWFIN_TOTAL_SIZE, card_name);
+
+ dev->base_addr = ioaddr;
+ dev->irq = irq;
+
+ /* Make certain the descriptor lists are aligned. */
+ yp = (void *)(((long)kmalloc(sizeof(*yp), GFP_KERNEL) + 31) & ~31);
+ memset(yp, 0, sizeof(*yp));
+ dev->priv = yp;
+
+#ifdef MODULE
+ yp->next_module = root_yellowfin_dev;
+ root_yellowfin_dev = dev;
+#endif
+
+ yp->chip_id = chip_id;
+
+ yp->full_duplex = 1;
+#ifdef YELLOWFIN_DEFAULT_MEDIA
+ yp->default_port = YELLOWFIN_DEFAULT_MEDIA;
+#endif
+#ifdef YELLOWFIN_NO_MEDIA_SWITCH
+ yp->medialock = 1;
+#endif
+
+ /* The lower four bits are the media type. */
+ if (options > 0) {
+ yp->full_duplex = (options & 16) ? 1 : 0;
+ yp->default_port = options & 15;
+ if (yp->default_port)
+ yp->medialock = 1;
+ }
+
+ /* The Yellowfin-specific entries in the device structure. */
+ dev->open = &yellowfin_open;
+ dev->hard_start_xmit = &yellowfin_start_xmit;
+ dev->stop = &yellowfin_close;
+ dev->get_stats = &yellowfin_get_stats;
+ dev->set_multicast_list = &set_rx_mode;
+ if (mtu)
+ dev->mtu = mtu;
+
+ /* todo: Reset the xcvr interface and turn on heartbeat. */
+
+ return dev;
+}
+
+
+static int
+yellowfin_open(struct device *dev)
+{
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ /* Reset the chip. */
+ outl(0x80000000, ioaddr + DMACtrl);
+
+#ifdef SA_SHIRQ
+ if (request_irq(dev->irq, &yellowfin_interrupt, SA_SHIRQ,
+ card_name, dev)) {
+ return -EAGAIN;
+ }
+#else
+ if (irq2dev_map[dev->irq] != NULL
+ || (irq2dev_map[dev->irq] = dev) == NULL
+ || dev->irq == 0
+ || request_irq(dev->irq, &yellowfin_interrupt, 0, card_name)) {
+ return -EAGAIN;
+ }
+#endif
+
+ if (yellowfin_debug > 1)
+ printk("%s: yellowfin_open() irq %d.\n", dev->name, dev->irq);
+
+ MOD_INC_USE_COUNT;
+
+ yellowfin_init_ring(dev);
+
+ outl(virt_to_bus(yp->rx_ring), ioaddr + RxPtr);
+ outl(virt_to_bus(yp->tx_ring), ioaddr + TxPtr);
+
+ /* Set up various condition 'select' registers.
+ There are no options here. */
+ outl(0x00800080, ioaddr + TxIntrSel); /* Interrupt on Tx abort */
+ outl(0x00800080, ioaddr + TxBranchSel); /* Branch on Tx abort */
+ outl(0x00400040, ioaddr + TxWaitSel); /* Wait on Tx status */
+ outl(0x00400040, ioaddr + RxIntrSel); /* Interrupt on Rx done */
+ outl(0x00400040, ioaddr + RxBranchSel); /* Branch on Rx error */
+ outl(0x00400040, ioaddr + RxWaitSel); /* Wait on Rx done */
+
+ /* Initialize other registers: with so many this eventually this will
+ converted to an offset/value list. */
+ outl(dma_ctrl, ioaddr + DMACtrl);
+ outw(fifo_cfg, ioaddr + FIFOcfg);
+ /* Enable automatic generation of flow control frames, period 0xffff. */
+ outl(0x0030FFFF, ioaddr + FlowCtrl);
+
+ if (dev->if_port == 0)
+ dev->if_port = yp->default_port;
+
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ yp->in_interrupt = 0;
+
+ /* We are always in full-duplex mode with the current chip! */
+ yp->full_duplex = 1;
+
+ /* Setting the Rx mode will start the Rx process. */
+ outw(0x01CD | (yp->full_duplex ? 2 : 0), ioaddr + Cnfg);
+#ifdef NEW_MULTICAST
+ set_rx_mode(dev);
+#else
+ set_rx_mode(dev, 0, 0);
+#endif
+
+ dev->start = 1;
+
+ /* Enable interrupts by setting the interrupt mask. */
+ outw(0x81ff, ioaddr + IntrEnb); /* See enum intr_status_bits */
+ outw(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
+ outl(0x80008000, ioaddr + RxCtrl); /* Start Rx and Tx channels. */
+ outl(0x80008000, ioaddr + TxCtrl);
+
+ if (yellowfin_debug > 2) {
+ printk("%s: Done yellowfin_open().\n",
+ dev->name);
+ }
+ /* Set the timer to check for link beat. */
+ init_timer(&yp->timer);
+ yp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
+ yp->timer.data = (unsigned long)dev;
+ yp->timer.function = &yellowfin_timer; /* timer handler */
+ add_timer(&yp->timer);
+
+ return 0;
+}
+
+static void yellowfin_timer(unsigned long data)
+{
+ struct device *dev = (struct device *)data;
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+ int next_tick = 0;
+
+ if (yellowfin_debug > 3) {
+ printk("%s: Yellowfin timer tick, status %8.8x.\n",
+ dev->name, inl(ioaddr + IntrStatus));
+ }
+ if (next_tick) {
+ yp->timer.expires = RUN_AT(next_tick);
+ add_timer(&yp->timer);
+ }
+}
+
+static void yellowfin_tx_timeout(struct device *dev)
+{
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ printk("%s: Yellowfin transmit timed out, status %8.8x, resetting...\n",
+ dev->name, inl(ioaddr));
+
+#ifndef __alpha__
+ {
+ int i;
+ printk(" Rx ring %8.8x: ", (int)yp->rx_ring);
+ for (i = 0; i < RX_RING_SIZE; i++)
+ printk(" %8.8x", (unsigned int)yp->rx_ring[i].status);
+ printk("\n Tx ring %8.8x: ", (int)yp->tx_ring);
+ for (i = 0; i < TX_RING_SIZE; i++)
+ printk(" %4.4x /%4.4x", yp->tx_status[i].tx_errs, yp->tx_ring[i].status);
+ printk("\n");
+ }
+#endif
+
+ /* Perhaps we should reinitialize the hardware here. */
+ dev->if_port = 0;
+ /* Stop and restart the chip's Tx processes . */
+
+ /* Trigger an immediate transmit demand. */
+
+ dev->trans_start = jiffies;
+ yp->stats.tx_errors++;
+ return;
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void
+yellowfin_init_ring(struct device *dev)
+{
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int i;
+
+ yp->tx_full = 0;
+ yp->cur_rx = yp->cur_tx = 0;
+ yp->dirty_rx = yp->dirty_tx = 0;
+
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ struct sk_buff *skb;
+ int pkt_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
+
+ yp->rx_ring[i].request_cnt = pkt_buf_sz;
+ yp->rx_ring[i].cmd = CMD_RX_BUF | INTR_ALWAYS;
+
+ skb = DEV_ALLOC_SKB(pkt_buf_sz);
+ skb_reserve(skb, 2); /* 16 byte align the IP header. */
+ yp->rx_skbuff[i] = skb;
+ if (skb == NULL)
+ break; /* Bad news! */
+ skb->dev = dev; /* Mark as being used by this device. */
+#if LINUX_VERSION_CODE > 0x10300
+ yp->rx_ring[i].addr = virt_to_bus(skb->tail);
+#else
+ yp->rx_ring[i].addr = virt_to_bus(skb->data);
+#endif
+ yp->rx_ring[i].branch_addr = virt_to_bus(&yp->rx_ring[i+1]);
+ }
+ /* Mark the last entry as wrapping the ring. */
+ yp->rx_ring[i-1].cmd = CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS;
+ yp->rx_ring[i-1].branch_addr = virt_to_bus(&yp->rx_ring[0]);
+
+/*#define NO_TXSTATS*/
+#ifdef NO_TXSTATS
+ /* In this mode the Tx ring needs only a single descriptor. */
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ yp->tx_skbuff[i] = 0;
+ yp->tx_ring[i].cmd = CMD_STOP;
+ yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
+ }
+ yp->tx_ring[--i].cmd = CMD_STOP | BRANCH_ALWAYS; /* Wrap ring */
+ yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[0]);
+#else
+ /* Tx ring needs a pair of descriptors, the second for the status. */
+ for (i = 0; i < TX_RING_SIZE*2; i++) {
+ yp->tx_skbuff[i/2] = 0;
+ yp->tx_ring[i].cmd = CMD_STOP; /* Branch on Tx error. */
+ yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
+ i++;
+ yp->tx_ring[i].cmd = CMD_TXSTATUS; /* Interrupt, no wait. */
+ yp->tx_ring[i].request_cnt = sizeof(yp->tx_status[i]);
+ yp->tx_ring[i].addr = virt_to_bus(&yp->tx_status[i/2]);
+ yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[i+1]);
+ }
+ /* Wrap ring */
+ yp->tx_ring[--i].cmd = CMD_TXSTATUS | BRANCH_ALWAYS | INTR_ALWAYS;
+ yp->tx_ring[i].branch_addr = virt_to_bus(&yp->tx_ring[0]);
+#endif
+}
+
+static int
+yellowfin_start_xmit(struct sk_buff *skb, struct device *dev)
+{
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ unsigned entry;
+
+ /* Block a timer-based transmit from overlapping. This could better be
+ done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
+ if (test_and_set_bit(0, (void*)&dev->tbusy) != 0) {
+ if (jiffies - dev->trans_start < TX_TIMEOUT)
+ return 1;
+ yellowfin_tx_timeout(dev);
+ return 1;
+ }
+
+ /* Caution: the write order is important here, set the base address
+ with the "ownership" bits last. */
+
+ /* Calculate the next Tx descriptor entry. */
+ entry = yp->cur_tx % TX_RING_SIZE;
+
+ yp->tx_skbuff[entry] = skb;
+
+#ifdef NO_TXSTATS
+ yp->tx_ring[entry].request_cnt = skb->len;
+ yp->tx_ring[entry].addr = virt_to_bus(skb->data);
+ yp->tx_ring[entry].status = 0;
+ if (entry >= TX_RING_SIZE-1) {
+ yp->tx_ring[0].cmd = CMD_STOP; /* New stop command. */
+ yp->tx_ring[TX_RING_SIZE-1].cmd = CMD_TX_PKT | BRANCH_ALWAYS;
+ } else {
+ yp->tx_ring[entry+1].cmd = CMD_STOP; /* New stop command. */
+ yp->tx_ring[entry].cmd = CMD_TX_PKT | BRANCH_IFTRUE;
+ }
+ yp->cur_tx++;
+#else
+ yp->tx_ring[entry<<1].request_cnt = skb->len;
+ yp->tx_ring[entry<<1].addr = virt_to_bus(skb->data);
+ /* The input_last (status-write) command is constant, but we must rewrite
+ the subsequent 'stop' command. */
+
+ yp->cur_tx++;
+ {
+ unsigned next_entry = yp->cur_tx % TX_RING_SIZE;
+ yp->tx_ring[next_entry<<1].cmd = CMD_STOP;
+ }
+ /* Final step -- overwrite the old 'stop' command. */
+
+ yp->tx_ring[entry<<1].cmd =
+ (entry % 6) == 0 ? CMD_TX_PKT | INTR_ALWAYS | BRANCH_IFTRUE :
+ CMD_TX_PKT | BRANCH_IFTRUE;
+#endif
+
+ /* Todo: explicitly flush cache lines here. */
+
+ /* Wake the potentially-idle transmit channel. */
+ outl(0x10001000, dev->base_addr + TxCtrl);
+
+ if (yp->cur_tx - yp->dirty_tx < TX_RING_SIZE - 1)
+ clear_bit(0, (void*)&dev->tbusy); /* Typical path */
+ else
+ yp->tx_full = 1;
+ dev->trans_start = jiffies;
+
+ if (yellowfin_debug > 4) {
+ printk("%s: Yellowfin transmit frame #%d queued in slot %d.\n",
+ dev->name, yp->cur_tx, entry);
+ }
+ return 0;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+ after the Tx thread. */
+static void yellowfin_interrupt IRQ(int irq, void *dev_instance, struct pt_regs *regs)
+{
+#ifdef SA_SHIRQ /* Use the now-standard shared IRQ implementation. */
+ struct device *dev = (struct device *)dev_instance;
+#else
+ struct device *dev = (struct device *)(irq2dev_map[irq]);
+#endif
+
+ struct yellowfin_private *lp;
+ int ioaddr, boguscnt = max_interrupt_work;
+
+ if (dev == NULL) {
+ printk ("yellowfin_interrupt(): irq %d for unknown device.\n", irq);
+ return;
+ }
+
+ ioaddr = dev->base_addr;
+ lp = (struct yellowfin_private *)dev->priv;
+ if (test_and_set_bit(0, (void*)&lp->in_interrupt)) {
+ dev->interrupt = 1;
+ printk(KERN_ERR "%s: Re-entering the interrupt handler.\n", dev->name);
+ return;
+ }
+
+ do {
+ u16 intr_status = inw(ioaddr + IntrClear);
+ unsigned dirty_tx = lp->dirty_tx;
+
+ if (yellowfin_debug > 4)
+ printk("%s: Yellowfin interrupt, status %4.4x.\n",
+ dev->name, intr_status);
+
+ if (intr_status == 0)
+ break;
+
+ if (intr_status & (IntrRxDone | IntrEarlyRx))
+ yellowfin_rx(dev);
+
+#ifdef NO_TXSTATS
+ for (; lp->cur_tx - dirty_tx > 0; dirty_tx++) {
+ int entry = dirty_tx % TX_RING_SIZE;
+ if (lp->tx_ring[entry].status == 0)
+ break;
+ /* Free the original skb. */
+ dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE);
+ lp->tx_skbuff[entry] = 0;
+ lp->stats.tx_packets++;
+ }
+ if (lp->tx_full && dev->tbusy
+ && lp->cur_tx - dirty_tx < TX_RING_SIZE - 4) {
+ /* The ring is no longer full, clear tbusy. */
+ lp->tx_full = 0;
+ clear_bit(0, (void*)&dev->tbusy);
+ mark_bh(NET_BH);
+ }
+ lp->dirty_tx = dirty_tx;
+#else
+ if (intr_status & IntrTxDone
+ || lp->tx_status[dirty_tx % TX_RING_SIZE].tx_errs) {
+
+ for (dirty_tx = lp->dirty_tx; lp->cur_tx - dirty_tx > 0;
+ dirty_tx++) {
+ /* Todo: optimize this. */
+ int entry = dirty_tx % TX_RING_SIZE;
+ u16 tx_errs = lp->tx_status[entry].tx_errs;
+
+ if (tx_errs == 0)
+ break; /* It still hasn't been Txed */
+ if (tx_errs & 0xF8100000) {
+ /* There was an major error, log it. */
+#ifndef final_version
+ if (yellowfin_debug > 1)
+ printk("%s: Transmit error, Tx status %4.4x.\n",
+ dev->name, tx_errs);
+#endif
+ lp->stats.tx_errors++;
+ if (tx_errs & 0xF800) lp->stats.tx_aborted_errors++;
+ if (tx_errs & 0x0800) lp->stats.tx_carrier_errors++;
+ if (tx_errs & 0x2000) lp->stats.tx_window_errors++;
+ if (tx_errs & 0x8000) lp->stats.tx_fifo_errors++;
+#ifdef ETHER_STATS
+ if (tx_errs & 0x1000) lp->stats.collisions16++;
+#endif
+ } else {
+#ifdef ETHER_STATS
+ if (status & 0x0400) lp->stats.tx_deferred++;
+#endif
+ lp->stats.collisions += tx_errs & 15;
+ lp->stats.tx_packets++;
+ }
+
+ /* Free the original skb. */
+ dev_kfree_skb(lp->tx_skbuff[entry], FREE_WRITE);
+ lp->tx_skbuff[entry] = 0;
+ /* Mark status as empty. */
+ lp->tx_status[entry].tx_errs = 0;
+ }
+
+#ifndef final_version
+ if (lp->cur_tx - dirty_tx > TX_RING_SIZE) {
+ printk("%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
+ dev->name, dirty_tx, lp->cur_tx, lp->tx_full);
+ dirty_tx += TX_RING_SIZE;
+ }
+#endif
+
+ if (lp->tx_full && dev->tbusy
+ && lp->cur_tx - dirty_tx < TX_RING_SIZE - 2) {
+ /* The ring is no longer full, clear tbusy. */
+ lp->tx_full = 0;
+ clear_bit(0, (void*)&dev->tbusy);
+ mark_bh(NET_BH);
+ }
+
+ lp->dirty_tx = dirty_tx;
+ }
+#endif
+
+ /* Log errors and other events. */
+ if (intr_status & 0x2ee) { /* Abnormal error summary. */
+ printk("%s: Something Wicked happened! %4.4x.\n",
+ dev->name, intr_status);
+ /* Hmmmmm, it's not clear what to do here. */
+ if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
+ lp->stats.tx_errors++;
+ if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
+ lp->stats.rx_errors++;
+ }
+ if (--boguscnt < 0) {
+ printk("%s: Too much work at interrupt, status=0x%4.4x.\n",
+ dev->name, intr_status);
+ break;
+ }
+ } while (1);
+
+ if (yellowfin_debug > 3)
+ printk("%s: exiting interrupt, status=%#4.4x.\n",
+ dev->name, inw(ioaddr + IntrStatus));
+
+ /* Code that should never be run! Perhaps remove after testing.. */
+ {
+ static int stopit = 10;
+ if (dev->start == 0 && --stopit < 0) {
+ printk("%s: Emergency stop, looping startup interrupt.\n",
+ dev->name);
+#ifdef SA_SHIRQ
+ free_irq(irq, dev);
+#else
+ free_irq(irq);
+#endif
+ }
+ }
+
+ dev->interrupt = 0;
+ clear_bit(0, (void*)&lp->in_interrupt);
+ return;
+}
+
+/* This routine is logically part of the interrupt handler, but seperated
+ for clarity and better register allocation. */
+static int
+yellowfin_rx(struct device *dev)
+{
+ struct yellowfin_private *lp = (struct yellowfin_private *)dev->priv;
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int entry = lp->cur_rx % RX_RING_SIZE;
+ int boguscnt = 20;
+
+ if (yellowfin_debug > 4) {
+ printk(" In yellowfin_rx(), entry %d status %4.4x.\n", entry,
+ yp->rx_ring[entry].status);
+ printk(" #%d desc. %4.4x %4.4x %8.8x %4.4x %4.4x.\n",
+ entry, yp->rx_ring[entry].cmd,
+ yp->rx_ring[entry].request_cnt, yp->rx_ring[entry].addr,
+ yp->rx_ring[entry].result_cnt, yp->rx_ring[entry].status);
+ }
+
+
+ /* If EOP is set on the next entry, it's a new packet. Send it up. */
+ while (yp->rx_ring[entry].status) {
+ /* Todo: optimize this mess. */
+ u16 desc_status = yp->rx_ring[entry].status;
+ struct yellowfin_desc *desc = &lp->rx_ring[entry];
+ int frm_size = desc->request_cnt - desc->result_cnt;
+ u8 *buf_addr = bus_to_virt(lp->rx_ring[entry].addr);
+ s16 frame_status = *(s16*)&(buf_addr[frm_size - 2]);
+
+ if (yellowfin_debug > 4)
+ printk(" yellowfin_rx() status was %4.4x.\n", frame_status);
+ if (--boguscnt < 0)
+ break;
+ if ( ! (desc_status & RX_EOP)) {
+ printk("%s: Oversized Ethernet frame spanned multiple buffers,"
+ " status %4.4x!\n", dev->name, desc_status);
+ lp->stats.rx_length_errors++;
+ } else if (frame_status & 0x0038) {
+ /* There was a error. */
+ if (yellowfin_debug > 3)
+ printk(" yellowfin_rx() Rx error was %4.4x.\n", frame_status);
+ lp->stats.rx_errors++;
+ if (frame_status & 0x0060) lp->stats.rx_length_errors++;
+ if (frame_status & 0x0008) lp->stats.rx_frame_errors++;
+ if (frame_status & 0x0010) lp->stats.rx_crc_errors++;
+ if (frame_status < 0) lp->stats.rx_dropped++;
+#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
+ } else if (memcmp(bus_to_virt(lp->rx_ring[entry].addr),
+ dev->dev_addr, 6) != 0
+ && memcmp(bus_to_virt(lp->rx_ring[entry].addr),
+ "\377\377\377\377\377\377", 6) != 0) {
+ printk("%s: Bad frame to %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x.\n",
+ dev->name,
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[0],
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[1],
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[2],
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[3],
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[4],
+ ((char *)bus_to_virt(lp->rx_ring[entry].addr))[5]);
+ bogus_rx++;
+#endif
+ } else {
+ u8 bogus_cnt = buf_addr[frm_size - 8];
+ int pkt_len = frm_size - 8 - bogus_cnt;
+ struct sk_buff *skb;
+ int rx_in_place = 0;
+
+ /* Check if the packet is long enough to just accept without
+ copying to a properly sized skbuff. */
+ if (pkt_len > rx_copybreak) {
+ struct sk_buff *newskb;
+ char *temp;
+
+ /* Get a fresh skbuff to replace the filled one. */
+ newskb = DEV_ALLOC_SKB(dev->mtu <= 1500 ? PKT_BUF_SZ
+ : dev->mtu + 32);
+ if (newskb == NULL) {
+ skb = 0; /* No memory, drop the packet. */
+ goto memory_squeeze;
+ }
+ /* Pass up the skb already on the Rx ring. */
+ skb = lp->rx_skbuff[entry];
+ temp = skb_put(skb, pkt_len);
+ if (bus_to_virt(lp->rx_ring[entry].addr) != temp)
+ printk("%s: Warning -- the skbuff addresses do not match"
+ " in yellowfin_rx: %p vs. %p / %p.\n", dev->name,
+ bus_to_virt(lp->rx_ring[entry].addr),
+ skb->head, temp);
+ rx_in_place = 1;
+ lp->rx_skbuff[entry] = newskb;
+ newskb->dev = dev;
+ skb_reserve(newskb, 2); /* 16 byte align IP header */
+ lp->rx_ring[entry].addr = virt_to_bus(newskb->tail);
+ } else
+ skb = DEV_ALLOC_SKB(pkt_len + 2);
+ memory_squeeze:
+ if (skb == NULL) {
+ printk("%s: Memory squeeze, deferring packet.\n", dev->name);
+ /* todo: Check that at least two ring entries are free.
+ If not, free one and mark stats->rx_dropped++. */
+ break;
+ }
+ skb->dev = dev;
+ if (! rx_in_place) {
+ skb_reserve(skb, 2); /* 16 byte align the data fields */
+ memcpy(skb_put(skb, pkt_len),
+ bus_to_virt(lp->rx_ring[entry].addr), pkt_len);
+ }
+#if LINUX_VERSION_CODE > 0x10300
+ skb->protocol = eth_type_trans(skb, dev);
+#else
+ skb->len = pkt_len;
+#endif
+ netif_rx(skb);
+ lp->stats.rx_packets++;
+ }
+
+ /* Mark this entry as being the end-of-list, and the prior entry
+ as now valid. */
+ lp->rx_ring[entry].cmd = CMD_STOP;
+ yp->rx_ring[entry].status = 0;
+ {
+ int prev_entry = entry - 1;
+ if (prev_entry < 0)
+ lp->rx_ring[RX_RING_SIZE - 1].cmd =
+ CMD_RX_BUF | INTR_ALWAYS | BRANCH_ALWAYS;
+ else
+ lp->rx_ring[prev_entry].cmd = CMD_RX_BUF | INTR_ALWAYS;
+ }
+ entry = (++lp->cur_rx) % RX_RING_SIZE;
+ }
+ /* todo: restart Rx engine if stopped. For now we just make the Rx ring
+ large enough to avoid this. */
+
+ return 0;
+}
+
+static int
+yellowfin_close(struct device *dev)
+{
+ int ioaddr = dev->base_addr;
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ int i;
+
+ dev->start = 0;
+ dev->tbusy = 1;
+
+ if (yellowfin_debug > 1) {
+ printk("%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
+ dev->name, inw(ioaddr + TxStatus),
+ inw(ioaddr + RxStatus), inl(ioaddr + IntrStatus));
+ printk("%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
+ dev->name, yp->cur_tx, yp->dirty_tx, yp->cur_rx, yp->dirty_rx);
+ }
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ outw(0x0000, ioaddr + IntrEnb);
+
+ /* Stop the chip's Tx and Rx processes. */
+ outl(0x80000000, ioaddr + RxCtrl);
+ outl(0x80000000, ioaddr + TxCtrl);
+
+ del_timer(&yp->timer);
+
+#ifdef __i386__
+ if (yellowfin_debug > 2) {
+ printk("\n Tx ring at %8.8x:\n", (int)virt_to_bus(yp->tx_ring));
+ for (i = 0; i < TX_RING_SIZE*2; i++)
+ printk(" %c #%d desc. %4.4x %4.4x %8.8x %8.8x %4.4x %4.4x.\n",
+ inl(ioaddr + TxPtr) == (long)&yp->tx_ring[i] ? '>' : ' ',
+ i, yp->tx_ring[i].cmd,
+ yp->tx_ring[i].request_cnt, yp->tx_ring[i].addr,
+ yp->tx_ring[i].branch_addr,
+ yp->tx_ring[i].result_cnt, yp->tx_ring[i].status);
+ printk(" Tx status %p:\n", yp->tx_status);
+ for (i = 0; i < TX_RING_SIZE; i++)
+ printk(" #%d status %4.4x %4.4x %4.4x %4.4x.\n",
+ i, yp->tx_status[i].tx_cnt, yp->tx_status[i].tx_errs,
+ yp->tx_status[i].total_tx_cnt, yp->tx_status[i].paused);
+
+ printk("\n Rx ring %8.8x:\n", (int)virt_to_bus(yp->rx_ring));
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ printk(" %c #%d desc. %4.4x %4.4x %8.8x %4.4x %4.4x\n",
+ inl(ioaddr + RxPtr) == (long)&yp->rx_ring[i] ? '>' : ' ',
+ i, yp->rx_ring[i].cmd,
+ yp->rx_ring[i].request_cnt, yp->rx_ring[i].addr,
+ yp->rx_ring[i].result_cnt, yp->rx_ring[i].status);
+ if (yellowfin_debug > 5) {
+ if (*(u8*)yp->rx_ring[i].addr != 0x69) {
+ int j;
+ for (j = 0; j < 0x50; j++)
+ printk(" %4.4x", ((u16*)yp->rx_ring[i].addr)[j]);
+ printk("\n");
+ }
+ }
+ }
+ }
+#endif /* __i386__ debugging only */
+
+#ifdef SA_SHIRQ
+ free_irq(dev->irq, dev);
+#else
+ free_irq(dev->irq);
+ irq2dev_map[dev->irq] = 0;
+#endif
+
+ /* Free all the skbuffs in the Rx queue. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ yp->rx_ring[i].cmd = CMD_STOP;
+ yp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
+ if (yp->rx_skbuff[i]) {
+#if LINUX_VERSION_CODE < 0x20100
+ yp->rx_skbuff[i]->free = 1;
+#endif
+ dev_kfree_skb(yp->rx_skbuff[i], FREE_WRITE);
+ }
+ yp->rx_skbuff[i] = 0;
+ }
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ if (yp->tx_skbuff[i])
+ dev_kfree_skb(yp->tx_skbuff[i], FREE_WRITE);
+ yp->tx_skbuff[i] = 0;
+ }
+
+#ifdef YF_PROTOTYPE /* Support for prototype hardware errata. */
+ if (yellowfin_debug > 0) {
+ printk("%s: Received %d frames that we should not have.\n",
+ dev->name, bogus_rx);
+ }
+#endif
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+static struct enet_statistics *
+yellowfin_get_stats(struct device *dev)
+{
+ struct yellowfin_private *yp = (struct yellowfin_private *)dev->priv;
+ return &yp->stats;
+}
+
+/* Set or clear the multicast filter for this adaptor. */
+
+/* The little-endian AUTODIN32 ethernet CRC calculation.
+ N.B. Do not use for bulk data, use a table-based routine instead.
+ This is common code and should be moved to net/core/crc.c */
+static unsigned const ethernet_polynomial_le = 0xedb88320U;
+static inline unsigned ether_crc_le(int length, unsigned char *data)
+{
+ unsigned int crc = 0xffffffff; /* Initial value. */
+ while(--length >= 0) {
+ unsigned char current_octet = *data++;
+ int bit;
+ for (bit = 8; --bit >= 0; current_octet >>= 1) {
+ if ((crc ^ current_octet) & 1) {
+ crc >>= 1;
+ crc ^= ethernet_polynomial_le;
+ } else
+ crc >>= 1;
+ }
+ }
+ return crc;
+}
+
+
+#ifdef NEW_MULTICAST
+static void set_rx_mode(struct device *dev)
+#else
+static void set_rx_mode(struct device *dev, int num_addrs, void *addrs);
+#endif
+{
+ int ioaddr = dev->base_addr;
+ u16 cfg_value = inw(ioaddr + Cnfg);
+
+ /* Stop the Rx process to change any value. */
+ outw(cfg_value & ~0x1000, ioaddr + Cnfg);
+ if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
+ /* Unconditionally log net taps. */
+ printk("%s: Promiscuous mode enabled.\n", dev->name);
+ outw(0x000F, ioaddr + AddrMode);
+ } else if ((dev->mc_count > 64) || (dev->flags & IFF_ALLMULTI)) {
+ /* Too many to filter well, or accept all multicasts. */
+ outw(0x000B, ioaddr + AddrMode);
+ } else if (dev->mc_count > 0) { /* Must use the multicast hash table. */
+ struct dev_mc_list *mclist;
+ u16 hash_table[4];
+ int i;
+ memset(hash_table, 0, sizeof(hash_table));
+ for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+ i++, mclist = mclist->next) {
+ /* Due to a bug in the early chip versions, multiple filter
+ slots must be set for each address. */
+ set_bit((ether_crc_le(3, mclist->dmi_addr) >> 3) & 0x3f,
+ hash_table);
+ set_bit((ether_crc_le(4, mclist->dmi_addr) >> 3) & 0x3f,
+ hash_table);
+ set_bit((ether_crc_le(5, mclist->dmi_addr) >> 3) & 0x3f,
+ hash_table);
+ set_bit((ether_crc_le(6, mclist->dmi_addr) >> 3) & 0x3f,
+ hash_table);
+ }
+ /* Copy the hash table to the chip. */
+ for (i = 0; i < 4; i++)
+ outw(hash_table[i], ioaddr + HashTbl + i*2);
+ outw(0x0003, ioaddr + AddrMode);
+ } else { /* Normal, unicast/broadcast-only mode. */
+ outw(0x0001, ioaddr + AddrMode);
+ }
+ /* Restart the Rx process. */
+ outw(cfg_value | 0x1000, ioaddr + Cnfg);
+}
+
+#ifdef MODULE
+
+/* An additional parameter that may be passed in... */
+static int debug = -1;
+
+int
+init_module(void)
+{
+ int cards_found;
+
+ if (debug >= 0)
+ yellowfin_debug = debug;
+
+ root_yellowfin_dev = NULL;
+ cards_found = yellowfin_probe(0);
+
+ return cards_found ? 0 : -ENODEV;
+}
+
+void
+cleanup_module(void)
+{
+ struct device *next_dev;
+
+ /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
+ while (root_yellowfin_dev) {
+ next_dev = ((struct yellowfin_private *)root_yellowfin_dev->priv)->next_module;
+ unregister_netdev(root_yellowfin_dev);
+ release_region(root_yellowfin_dev->base_addr, YELLOWFIN_TOTAL_SIZE);
+ kfree(root_yellowfin_dev);
+ root_yellowfin_dev = next_dev;
+ }
+}
+
+#endif /* MODULE */
+
+/*
+ * Local variables:
+ * compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c yellowfin.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
+ * SMP-compile-command: "gcc -D__SMP__ -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c yellowfin.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
+ * c-indent-level: 4
+ * c-basic-offset: 4
+ * tab-width: 4
+ * End:
+ */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov