Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/net/hamachi.c b/drivers/net/hamachi.c
new file mode 100644
index 0000000..3d96714
--- /dev/null
+++ b/drivers/net/hamachi.c
@@ -0,0 +1,2024 @@
+/* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */
+/*
+ Written 1998-2000 by Donald Becker.
+ Updates 2000 by Keith Underwood.
+
+ This software may be used and distributed according to the terms of
+ the GNU General Public License (GPL), incorporated herein by reference.
+ Drivers based on or derived from this code fall under the GPL and must
+ retain the authorship, copyright and license notice. This file is not
+ a complete program and may only be used when the entire operating
+ system is licensed under the GPL.
+
+ The author may be reached as becker@scyld.com, or C/O
+ Scyld Computing Corporation
+ 410 Severn Ave., Suite 210
+ Annapolis MD 21403
+
+ This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet
+ adapter.
+
+ Support and updates available at
+ http://www.scyld.com/network/hamachi.html
+ or
+ http://www.parl.clemson.edu/~keithu/hamachi.html
+
+
+
+ Linux kernel changelog:
+
+ LK1.0.1:
+ - fix lack of pci_dev<->dev association
+ - ethtool support (jgarzik)
+
+*/
+
+#define DRV_NAME "hamachi"
+#define DRV_VERSION "1.01+LK1.0.1"
+#define DRV_RELDATE "5/18/2001"
+
+
+/* A few user-configurable values. */
+
+static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
+#define final_version
+#define hamachi_debug debug
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 40;
+static int mtu;
+/* Default values selected by testing on a dual processor PIII-450 */
+/* These six interrupt control parameters may be set directly when loading the
+ * module, or through the rx_params and tx_params variables
+ */
+static int max_rx_latency = 0x11;
+static int max_rx_gap = 0x05;
+static int min_rx_pkt = 0x18;
+static int max_tx_latency = 0x00;
+static int max_tx_gap = 0x00;
+static int min_tx_pkt = 0x30;
+
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+ -Setting to > 1518 causes all frames to be copied
+ -Setting to 0 disables copies
+*/
+static int rx_copybreak;
+
+/* An override for the hardware detection of bus width.
+ Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit.
+ Add 2 to disable parity detection.
+*/
+static int force32;
+
+
+/* Used to pass the media type, etc.
+ These exist for driver interoperability.
+ No media types are currently defined.
+ - The lower 4 bits are reserved for the media type.
+ - The next three bits may be set to one of the following:
+ 0x00000000 : Autodetect PCI bus
+ 0x00000010 : Force 32 bit PCI bus
+ 0x00000020 : Disable parity detection
+ 0x00000040 : Force 64 bit PCI bus
+ Default is autodetect
+ - The next bit can be used to force half-duplex. This is a bad
+ idea since no known implementations implement half-duplex, and,
+ in general, half-duplex for gigabit ethernet is a bad idea.
+ 0x00000080 : Force half-duplex
+ Default is full-duplex.
+ - In the original driver, the ninth bit could be used to force
+ full-duplex. Maintain that for compatibility
+ 0x00000200 : Force full-duplex
+*/
+#define MAX_UNITS 8 /* More are supported, limit only on options */
+static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+/* The Hamachi chipset supports 3 parameters each for Rx and Tx
+ * interruput management. Parameters will be loaded as specified into
+ * the TxIntControl and RxIntControl registers.
+ *
+ * The registers are arranged as follows:
+ * 23 - 16 15 - 8 7 - 0
+ * _________________________________
+ * | min_pkt | max_gap | max_latency |
+ * ---------------------------------
+ * min_pkt : The minimum number of packets processed between
+ * interrupts.
+ * max_gap : The maximum inter-packet gap in units of 8.192 us
+ * max_latency : The absolute time between interrupts in units of 8.192 us
+ *
+ */
+static int rx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+static int tx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+
+/* Operational parameters that are set at compile time. */
+
+/* Keep the ring sizes a power of two for compile efficiency.
+ The compiler will convert <unsigned>'%'<2^N> into a bit mask.
+ 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, except for
+ excessive memory usage */
+/* Empirically it appears that the Tx ring needs to be a little bigger
+ for these Gbit adapters or you get into an overrun condition really
+ easily. Also, things appear to work a bit better in back-to-back
+ configurations if the Rx ring is 8 times the size of the Tx ring
+*/
+#define TX_RING_SIZE 64
+#define RX_RING_SIZE 512
+#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct hamachi_desc)
+#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct hamachi_desc)
+
+/*
+ * Enable netdev_ioctl. Added interrupt coalescing parameter adjustment.
+ * 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov>
+ */
+
+/* play with 64-bit addrlen; seems to be a teensy bit slower --pw */
+/* #define ADDRLEN 64 */
+
+/*
+ * RX_CHECKSUM turns on card-generated receive checksum generation for
+ * TCP and UDP packets. Otherwise the upper layers do the calculation.
+ * TX_CHECKSUM won't do anything too useful, even if it works. There's no
+ * easy mechanism by which to tell the TCP/UDP stack that it need not
+ * generate checksums for this device. But if somebody can find a way
+ * to get that to work, most of the card work is in here already.
+ * 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov>
+ */
+#undef TX_CHECKSUM
+#define RX_CHECKSUM
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT (5*HZ)
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/processor.h> /* Processor type for cache alignment. */
+#include <asm/io.h>
+#include <asm/unaligned.h>
+#include <asm/cache.h>
+
+static char version[] __devinitdata =
+KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"
+KERN_INFO " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
+KERN_INFO " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
+
+
+/* IP_MF appears to be only defined in <netinet/ip.h>, however,
+ we need it for hardware checksumming support. FYI... some of
+ the definitions in <netinet/ip.h> conflict/duplicate those in
+ other linux headers causing many compiler warnings.
+*/
+#ifndef IP_MF
+ #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
+#endif
+
+/* Define IP_OFFSET to be IPOPT_OFFSET */
+#ifndef IP_OFFSET
+ #ifdef IPOPT_OFFSET
+ #define IP_OFFSET IPOPT_OFFSET
+ #else
+ #define IP_OFFSET 2
+ #endif
+#endif
+
+#define RUN_AT(x) (jiffies + (x))
+
+/* Condensed bus+endian portability operations. */
+#if ADDRLEN == 64
+#define cpu_to_leXX(addr) cpu_to_le64(addr)
+#else
+#define cpu_to_leXX(addr) cpu_to_le32(addr)
+#endif
+
+
+/*
+ Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the Packet Engines "Hamachi"
+Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
+66Mhz PCI card.
+
+II. Board-specific settings
+
+No jumpers exist on the board. The chip supports software correction of
+various motherboard wiring errors, however this driver does not support
+that feature.
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+The Hamachi uses a typical descriptor based bus-master architecture.
+The descriptor list is similar to that used by the Digital 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.
+
+This driver uses a zero-copy receive and transmit scheme similar my other
+network drivers.
+The driver allocates full frame size skbuffs for the Rx ring buffers at
+open() time and passes the skb->data field to the Hamachi 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. Gigabit cards are typically used on generously configured machines
+and the underfilled buffers have negligible impact compared to the benefit of
+a single allocation size, so the default value of zero results in never
+copying packets.
+
+IIIb/c. Transmit/Receive Structure
+
+The Rx and Tx descriptor structure are straight-forward, with no historical
+baggage that must be explained. Unlike the awkward DBDMA structure, there
+are no unused fields or option bits that had only one allowable setting.
+
+Two details should be noted about the descriptors: The chip supports both 32
+bit and 64 bit address structures, and the length field is overwritten on
+the receive descriptors. The descriptor length is set in the control word
+for each channel. The development driver uses 32 bit addresses only, however
+64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
+
+IIId. Synchronization
+
+This driver is very similar to my other network drivers.
+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 'hmp->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 'hmp->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 GNIC-II boards.
+
+IVb. References
+
+Hamachi Engineering Design Specification, 5/15/97
+(Note: This version was marked "Confidential".)
+
+IVc. Errata
+
+None noted.
+
+V. Recent Changes
+
+01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
+ to help avoid some stall conditions -- this needs further research.
+
+01/15/1999 EPK Creation of the hamachi_tx function. This function cleans
+ the Tx ring and is called from hamachi_start_xmit (this used to be
+ called from hamachi_interrupt but it tends to delay execution of the
+ interrupt handler and thus reduce bandwidth by reducing the latency
+ between hamachi_rx()'s). Notably, some modification has been made so
+ that the cleaning loop checks only to make sure that the DescOwn bit
+ isn't set in the status flag since the card is not required
+ to set the entire flag to zero after processing.
+
+01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
+ checked before attempting to add a buffer to the ring. If the ring is full
+ an attempt is made to free any dirty buffers and thus find space for
+ the new buffer or the function returns non-zero which should case the
+ scheduler to reschedule the buffer later.
+
+01/15/1999 EPK Some adjustments were made to the chip initialization.
+ End-to-end flow control should now be fully active and the interrupt
+ algorithm vars have been changed. These could probably use further tuning.
+
+01/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
+ set the rx and tx latencies for the Hamachi interrupts. If you're having
+ problems with network stalls, try setting these to higher values.
+ Valid values are 0x00 through 0xff.
+
+01/15/1999 EPK In general, the overall bandwidth has increased and
+ latencies are better (sometimes by a factor of 2). Stalls are rare at
+ this point, however there still appears to be a bug somewhere between the
+ hardware and driver. TCP checksum errors under load also appear to be
+ eliminated at this point.
+
+01/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
+ Rx and Tx rings. This appears to have been affecting whether a particular
+ peer-to-peer connection would hang under high load. I believe the Rx
+ rings was typically getting set correctly, but the Tx ring wasn't getting
+ the DescEndRing bit set during initialization. ??? Does this mean the
+ hamachi card is using the DescEndRing in processing even if a particular
+ slot isn't in use -- hypothetically, the card might be searching the
+ entire Tx ring for slots with the DescOwn bit set and then processing
+ them. If the DescEndRing bit isn't set, then it might just wander off
+ through memory until it hits a chunk of data with that bit set
+ and then looping back.
+
+02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
+ problem (TxCmd and RxCmd need only to be set when idle or stopped.
+
+02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
+ (Michel Mueller pointed out the ``permanently busy'' potential
+ problem here).
+
+02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
+
+02/23/1999 EPK Verified that the interrupt status field bits for Tx were
+ incorrectly defined and corrected (as per Michel Mueller).
+
+02/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
+ were available before reseting the tbusy and tx_full flags
+ (as per Michel Mueller).
+
+03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
+
+12/31/1999 KDU Cleaned up assorted things and added Don's code to force
+32 bit.
+
+02/20/2000 KDU Some of the control was just plain odd. Cleaned up the
+hamachi_start_xmit() and hamachi_interrupt() code. There is still some
+re-structuring I would like to do.
+
+03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
+parameters on a dual P3-450 setup yielded the new default interrupt
+mitigation parameters. Tx should interrupt VERY infrequently due to
+Eric's scheme. Rx should be more often...
+
+03/13/2000 KDU Added a patch to make the Rx Checksum code interact
+nicely with non-linux machines.
+
+03/13/2000 KDU Experimented with some of the configuration values:
+
+ -It seems that enabling PCI performance commands for descriptors
+ (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
+ performance impact for any of my tests. (ttcp, netpipe, netperf) I will
+ leave them that way until I hear further feedback.
+
+ -Increasing the PCI_LATENCY_TIMER to 130
+ (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
+ degrade performance. Leaving default at 64 pending further information.
+
+03/14/2000 KDU Further tuning:
+
+ -adjusted boguscnt in hamachi_rx() to depend on interrupt
+ mitigation parameters chosen.
+
+ -Selected a set of interrupt parameters based on some extensive testing.
+ These may change with more testing.
+
+TO DO:
+
+-Consider borrowing from the acenic driver code to check PCI_COMMAND for
+PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
+that case.
+
+-fix the reset procedure. It doesn't quite work.
+*/
+
+/* A few values that may be tweaked. */
+/* Size of each temporary Rx buffer, calculated as:
+ * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
+ * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
+ * 2 more because we use skb_reserve.
+ */
+#define PKT_BUF_SZ 1538
+
+/* For now, this is going to be set to the maximum size of an ethernet
+ * packet. Eventually, we may want to make it a variable that is
+ * related to the MTU
+ */
+#define MAX_FRAME_SIZE 1518
+
+/* The rest of these values should never change. */
+
+static void hamachi_timer(unsigned long data);
+
+enum capability_flags {CanHaveMII=1, };
+static struct chip_info {
+ u16 vendor_id, device_id, device_id_mask, pad;
+ const char *name;
+ void (*media_timer)(unsigned long data);
+ int flags;
+} chip_tbl[] = {
+ {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
+ {0,},
+};
+
+/* Offsets to the Hamachi registers. Various sizes. */
+enum hamachi_offsets {
+ TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
+ RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
+ PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
+ LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
+ TxChecksum=0x074, RxChecksum=0x076,
+ TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
+ InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
+ EventStatus=0x08C,
+ MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
+ /* See enum MII_offsets below. */
+ MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
+ AddrMode=0x0D0, StationAddr=0x0D2,
+ /* Gigabit AutoNegotiation. */
+ ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
+ ANLinkPartnerAbility=0x0EA,
+ EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2,
+ FIFOcfg=0x0F8,
+};
+
+/* Offsets to the MII-mode registers. */
+enum MII_offsets {
+ MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC,
+ MII_Status=0xAE,
+};
+
+/* Bits in the interrupt status/mask registers. */
+enum intr_status_bits {
+ IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04,
+ IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400,
+ LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, };
+
+/* The Hamachi Rx and Tx buffer descriptors. */
+struct hamachi_desc {
+ u32 status_n_length;
+#if ADDRLEN == 64
+ u32 pad;
+ u64 addr;
+#else
+ u32 addr;
+#endif
+};
+
+/* Bits in hamachi_desc.status_n_length */
+enum desc_status_bits {
+ DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000,
+ DescIntr=0x10000000,
+};
+
+#define PRIV_ALIGN 15 /* Required alignment mask */
+#define MII_CNT 4
+struct hamachi_private {
+ /* Descriptor rings first for alignment. Tx requires a second descriptor
+ for status. */
+ struct hamachi_desc *rx_ring;
+ struct hamachi_desc *tx_ring;
+ struct sk_buff* rx_skbuff[RX_RING_SIZE];
+ struct sk_buff* tx_skbuff[TX_RING_SIZE];
+ dma_addr_t tx_ring_dma;
+ dma_addr_t rx_ring_dma;
+ struct net_device_stats stats;
+ struct timer_list timer; /* Media selection timer. */
+ /* Frequently used and paired value: keep adjacent for cache effect. */
+ spinlock_t lock;
+ int chip_id;
+ unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
+ unsigned int cur_tx, dirty_tx;
+ unsigned int rx_buf_sz; /* Based on MTU+slack. */
+ unsigned int tx_full:1; /* The Tx queue is full. */
+ unsigned int duplex_lock:1;
+ unsigned int default_port:4; /* Last dev->if_port value. */
+ /* MII transceiver section. */
+ int mii_cnt; /* MII device addresses. */
+ struct mii_if_info mii_if; /* MII lib hooks/info */
+ unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */
+ u32 rx_int_var, tx_int_var; /* interrupt control variables */
+ u32 option; /* Hold on to a copy of the options */
+ struct pci_dev *pci_dev;
+ void __iomem *base;
+};
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>");
+MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver");
+MODULE_LICENSE("GPL");
+
+module_param(max_interrupt_work, int, 0);
+module_param(mtu, int, 0);
+module_param(debug, int, 0);
+module_param(min_rx_pkt, int, 0);
+module_param(max_rx_gap, int, 0);
+module_param(max_rx_latency, int, 0);
+module_param(min_tx_pkt, int, 0);
+module_param(max_tx_gap, int, 0);
+module_param(max_tx_latency, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param_array(rx_params, int, NULL, 0);
+module_param_array(tx_params, int, NULL, 0);
+module_param_array(options, int, NULL, 0);
+module_param_array(full_duplex, int, NULL, 0);
+module_param(force32, int, 0);
+MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt");
+MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)");
+MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)");
+MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts");
+MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units");
+MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units");
+MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts");
+MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units");
+MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units");
+MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency");
+MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency");
+MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex");
+MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)");
+MODULE_PARM_DESC(force32, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)");
+
+static int read_eeprom(void __iomem *ioaddr, int location);
+static int mdio_read(struct net_device *dev, int phy_id, int location);
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
+static int hamachi_open(struct net_device *dev);
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static void hamachi_timer(unsigned long data);
+static void hamachi_tx_timeout(struct net_device *dev);
+static void hamachi_init_ring(struct net_device *dev);
+static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
+static int hamachi_rx(struct net_device *dev);
+static inline int hamachi_tx(struct net_device *dev);
+static void hamachi_error(struct net_device *dev, int intr_status);
+static int hamachi_close(struct net_device *dev);
+static struct net_device_stats *hamachi_get_stats(struct net_device *dev);
+static void set_rx_mode(struct net_device *dev);
+static struct ethtool_ops ethtool_ops;
+static struct ethtool_ops ethtool_ops_no_mii;
+
+static int __devinit hamachi_init_one (struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct hamachi_private *hmp;
+ int option, i, rx_int_var, tx_int_var, boguscnt;
+ int chip_id = ent->driver_data;
+ int irq;
+ void __iomem *ioaddr;
+ unsigned long base;
+ static int card_idx;
+ struct net_device *dev;
+ void *ring_space;
+ dma_addr_t ring_dma;
+ int ret = -ENOMEM;
+
+/* when built into the kernel, we only print version if device is found */
+#ifndef MODULE
+ static int printed_version;
+ if (!printed_version++)
+ printk(version);
+#endif
+
+ if (pci_enable_device(pdev)) {
+ ret = -EIO;
+ goto err_out;
+ }
+
+ base = pci_resource_start(pdev, 0);
+#ifdef __alpha__ /* Really "64 bit addrs" */
+ base |= (pci_resource_start(pdev, 1) << 32);
+#endif
+
+ pci_set_master(pdev);
+
+ i = pci_request_regions(pdev, DRV_NAME);
+ if (i) return i;
+
+ irq = pdev->irq;
+ ioaddr = ioremap(base, 0x400);
+ if (!ioaddr)
+ goto err_out_release;
+
+ dev = alloc_etherdev(sizeof(struct hamachi_private));
+ if (!dev)
+ goto err_out_iounmap;
+
+ SET_MODULE_OWNER(dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+#ifdef TX_CHECKSUM
+ printk("check that skbcopy in ip_queue_xmit isn't happening\n");
+ dev->hard_header_len += 8; /* for cksum tag */
+#endif
+
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i)
+ : readb(ioaddr + StationAddr + i);
+
+#if ! defined(final_version)
+ if (hamachi_debug > 4)
+ for (i = 0; i < 0x10; i++)
+ printk("%2.2x%s",
+ read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n");
+#endif
+
+ hmp = netdev_priv(dev);
+ spin_lock_init(&hmp->lock);
+
+ hmp->mii_if.dev = dev;
+ hmp->mii_if.mdio_read = mdio_read;
+ hmp->mii_if.mdio_write = mdio_write;
+ hmp->mii_if.phy_id_mask = 0x1f;
+ hmp->mii_if.reg_num_mask = 0x1f;
+
+ ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
+ if (!ring_space)
+ goto err_out_cleardev;
+ hmp->tx_ring = (struct hamachi_desc *)ring_space;
+ hmp->tx_ring_dma = ring_dma;
+
+ ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
+ if (!ring_space)
+ goto err_out_unmap_tx;
+ hmp->rx_ring = (struct hamachi_desc *)ring_space;
+ hmp->rx_ring_dma = ring_dma;
+
+ /* Check for options being passed in */
+ option = card_idx < MAX_UNITS ? options[card_idx] : 0;
+ if (dev->mem_start)
+ option = dev->mem_start;
+
+ /* If the bus size is misidentified, do the following. */
+ force32 = force32 ? force32 :
+ ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 );
+ if (force32)
+ writeb(force32, ioaddr + VirtualJumpers);
+
+ /* Hmmm, do we really need to reset the chip???. */
+ writeb(0x01, ioaddr + ChipReset);
+
+ /* After a reset, the clock speed measurement of the PCI bus will not
+ * be valid for a moment. Wait for a little while until it is. If
+ * it takes more than 10ms, forget it.
+ */
+ udelay(10);
+ i = readb(ioaddr + PCIClkMeas);
+ for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){
+ udelay(10);
+ i = readb(ioaddr + PCIClkMeas);
+ }
+
+ hmp->base = ioaddr;
+ dev->base_addr = (unsigned long)ioaddr;
+ dev->irq = irq;
+ pci_set_drvdata(pdev, dev);
+
+ hmp->chip_id = chip_id;
+ hmp->pci_dev = pdev;
+
+ /* The lower four bits are the media type. */
+ if (option > 0) {
+ hmp->option = option;
+ if (option & 0x200)
+ hmp->mii_if.full_duplex = 1;
+ else if (option & 0x080)
+ hmp->mii_if.full_duplex = 0;
+ hmp->default_port = option & 15;
+ if (hmp->default_port)
+ hmp->mii_if.force_media = 1;
+ }
+ if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
+ hmp->mii_if.full_duplex = 1;
+
+ /* lock the duplex mode if someone specified a value */
+ if (hmp->mii_if.full_duplex || (option & 0x080))
+ hmp->duplex_lock = 1;
+
+ /* Set interrupt tuning parameters */
+ max_rx_latency = max_rx_latency & 0x00ff;
+ max_rx_gap = max_rx_gap & 0x00ff;
+ min_rx_pkt = min_rx_pkt & 0x00ff;
+ max_tx_latency = max_tx_latency & 0x00ff;
+ max_tx_gap = max_tx_gap & 0x00ff;
+ min_tx_pkt = min_tx_pkt & 0x00ff;
+
+ rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1;
+ tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1;
+ hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var :
+ (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency);
+ hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var :
+ (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency);
+
+
+ /* The Hamachi-specific entries in the device structure. */
+ dev->open = &hamachi_open;
+ dev->hard_start_xmit = &hamachi_start_xmit;
+ dev->stop = &hamachi_close;
+ dev->get_stats = &hamachi_get_stats;
+ dev->set_multicast_list = &set_rx_mode;
+ dev->do_ioctl = &netdev_ioctl;
+ if (chip_tbl[hmp->chip_id].flags & CanHaveMII)
+ SET_ETHTOOL_OPS(dev, ðtool_ops);
+ else
+ SET_ETHTOOL_OPS(dev, ðtool_ops_no_mii);
+ dev->tx_timeout = &hamachi_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+ if (mtu)
+ dev->mtu = mtu;
+
+ i = register_netdev(dev);
+ if (i) {
+ ret = i;
+ goto err_out_unmap_rx;
+ }
+
+ printk(KERN_INFO "%s: %s type %x at %p, ",
+ dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
+ ioaddr);
+ for (i = 0; i < 5; i++)
+ printk("%2.2x:", dev->dev_addr[i]);
+ printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
+ i = readb(ioaddr + PCIClkMeas);
+ printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers "
+ "%2.2x, LPA %4.4x.\n",
+ dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32,
+ i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers),
+ readw(ioaddr + ANLinkPartnerAbility));
+
+ if (chip_tbl[hmp->chip_id].flags & CanHaveMII) {
+ int phy, phy_idx = 0;
+ for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) {
+ int mii_status = mdio_read(dev, phy, MII_BMSR);
+ if (mii_status != 0xffff &&
+ mii_status != 0x0000) {
+ hmp->phys[phy_idx++] = phy;
+ hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
+ printk(KERN_INFO "%s: MII PHY found at address %d, status "
+ "0x%4.4x advertising %4.4x.\n",
+ dev->name, phy, mii_status, hmp->mii_if.advertising);
+ }
+ }
+ hmp->mii_cnt = phy_idx;
+ if (hmp->mii_cnt > 0)
+ hmp->mii_if.phy_id = hmp->phys[0];
+ else
+ memset(&hmp->mii_if, 0, sizeof(hmp->mii_if));
+ }
+ /* Configure gigabit autonegotiation. */
+ writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
+ writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */
+ writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */
+
+ card_idx++;
+ return 0;
+
+err_out_unmap_rx:
+ pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
+ hmp->rx_ring_dma);
+err_out_unmap_tx:
+ pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
+ hmp->tx_ring_dma);
+err_out_cleardev:
+ free_netdev (dev);
+err_out_iounmap:
+ iounmap(ioaddr);
+err_out_release:
+ pci_release_regions(pdev);
+err_out:
+ return ret;
+}
+
+static int __devinit read_eeprom(void __iomem *ioaddr, int location)
+{
+ int bogus_cnt = 1000;
+
+ /* We should check busy first - per docs -KDU */
+ while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
+ writew(location, ioaddr + EEAddr);
+ writeb(0x02, ioaddr + EECmdStatus);
+ bogus_cnt = 1000;
+ while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0);
+ if (hamachi_debug > 5)
+ printk(" EEPROM status is %2.2x after %d ticks.\n",
+ (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt);
+ return readb(ioaddr + EEData);
+}
+
+/* MII Managemen Data I/O accesses.
+ These routines assume the MDIO controller is idle, and do not exit until
+ the command is finished. */
+
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ int i;
+
+ /* We should check busy first - per docs -KDU */
+ for (i = 10000; i >= 0; i--)
+ if ((readw(ioaddr + MII_Status) & 1) == 0)
+ break;
+ writew((phy_id<<8) + location, ioaddr + MII_Addr);
+ writew(0x0001, ioaddr + MII_Cmd);
+ for (i = 10000; i >= 0; i--)
+ if ((readw(ioaddr + MII_Status) & 1) == 0)
+ break;
+ return readw(ioaddr + MII_Rd_Data);
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ int i;
+
+ /* We should check busy first - per docs -KDU */
+ for (i = 10000; i >= 0; i--)
+ if ((readw(ioaddr + MII_Status) & 1) == 0)
+ break;
+ writew((phy_id<<8) + location, ioaddr + MII_Addr);
+ writew(value, ioaddr + MII_Wr_Data);
+
+ /* Wait for the command to finish. */
+ for (i = 10000; i >= 0; i--)
+ if ((readw(ioaddr + MII_Status) & 1) == 0)
+ break;
+ return;
+}
+
+
+static int hamachi_open(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ int i;
+ u32 rx_int_var, tx_int_var;
+ u16 fifo_info;
+
+ i = request_irq(dev->irq, &hamachi_interrupt, SA_SHIRQ, dev->name, dev);
+ if (i)
+ return i;
+
+ if (hamachi_debug > 1)
+ printk(KERN_DEBUG "%s: hamachi_open() irq %d.\n",
+ dev->name, dev->irq);
+
+ hamachi_init_ring(dev);
+
+#if ADDRLEN == 64
+ /* writellll anyone ? */
+ writel(cpu_to_le64(hmp->rx_ring_dma), ioaddr + RxPtr);
+ writel(cpu_to_le64(hmp->rx_ring_dma) >> 32, ioaddr + RxPtr + 4);
+ writel(cpu_to_le64(hmp->tx_ring_dma), ioaddr + TxPtr);
+ writel(cpu_to_le64(hmp->tx_ring_dma) >> 32, ioaddr + TxPtr + 4);
+#else
+ writel(cpu_to_le32(hmp->rx_ring_dma), ioaddr + RxPtr);
+ writel(cpu_to_le32(hmp->tx_ring_dma), ioaddr + TxPtr);
+#endif
+
+ /* TODO: It would make sense to organize this as words since the card
+ * documentation does. -KDU
+ */
+ for (i = 0; i < 6; i++)
+ writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
+
+ /* Initialize other registers: with so many this eventually this will
+ converted to an offset/value list. */
+
+ /* Configure the FIFO */
+ fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6;
+ switch (fifo_info){
+ case 0 :
+ /* No FIFO */
+ writew(0x0000, ioaddr + FIFOcfg);
+ break;
+ case 1 :
+ /* Configure the FIFO for 512K external, 16K used for Tx. */
+ writew(0x0028, ioaddr + FIFOcfg);
+ break;
+ case 2 :
+ /* Configure the FIFO for 1024 external, 32K used for Tx. */
+ writew(0x004C, ioaddr + FIFOcfg);
+ break;
+ case 3 :
+ /* Configure the FIFO for 2048 external, 32K used for Tx. */
+ writew(0x006C, ioaddr + FIFOcfg);
+ break;
+ default :
+ printk(KERN_WARNING "%s: Unsupported external memory config!\n",
+ dev->name);
+ /* Default to no FIFO */
+ writew(0x0000, ioaddr + FIFOcfg);
+ break;
+ }
+
+ if (dev->if_port == 0)
+ dev->if_port = hmp->default_port;
+
+
+ /* Setting the Rx mode will start the Rx process. */
+ /* If someone didn't choose a duplex, default to full-duplex */
+ if (hmp->duplex_lock != 1)
+ hmp->mii_if.full_duplex = 1;
+
+ /* always 1, takes no more time to do it */
+ writew(0x0001, ioaddr + RxChecksum);
+#ifdef TX_CHECKSUM
+ writew(0x0001, ioaddr + TxChecksum);
+#else
+ writew(0x0000, ioaddr + TxChecksum);
+#endif
+ writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */
+ writew(0x215F, ioaddr + MACCnfg);
+ writew(0x000C, ioaddr + FrameGap0);
+ /* WHAT?!?!? Why isn't this documented somewhere? -KDU */
+ writew(0x1018, ioaddr + FrameGap1);
+ /* Why do we enable receives/transmits here? -KDU */
+ writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */
+ /* Enable automatic generation of flow control frames, period 0xffff. */
+ writel(0x0030FFFF, ioaddr + FlowCtrl);
+ writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */
+
+ /* Enable legacy links. */
+ writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */
+ /* Initial Link LED to blinking red. */
+ writeb(0x03, ioaddr + LEDCtrl);
+
+ /* Configure interrupt mitigation. This has a great effect on
+ performance, so systems tuning should start here!. */
+
+ rx_int_var = hmp->rx_int_var;
+ tx_int_var = hmp->tx_int_var;
+
+ if (hamachi_debug > 1) {
+ printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n",
+ tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8,
+ (tx_int_var & 0x00ff0000) >> 16);
+ printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n",
+ rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8,
+ (rx_int_var & 0x00ff0000) >> 16);
+ printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var);
+ }
+
+ writel(tx_int_var, ioaddr + TxIntrCtrl);
+ writel(rx_int_var, ioaddr + RxIntrCtrl);
+
+ set_rx_mode(dev);
+
+ netif_start_queue(dev);
+
+ /* Enable interrupts by setting the interrupt mask. */
+ writel(0x80878787, ioaddr + InterruptEnable);
+ writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */
+
+ /* Configure and start the DMA channels. */
+ /* Burst sizes are in the low three bits: size = 4<<(val&7) */
+#if ADDRLEN == 64
+ writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */
+ writew(0x005D, ioaddr + TxDMACtrl);
+#else
+ writew(0x001D, ioaddr + RxDMACtrl);
+ writew(0x001D, ioaddr + TxDMACtrl);
+#endif
+ writew(0x0001, ioaddr + RxCmd);
+
+ if (hamachi_debug > 2) {
+ printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n",
+ dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus));
+ }
+ /* Set the timer to check for link beat. */
+ init_timer(&hmp->timer);
+ hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */
+ hmp->timer.data = (unsigned long)dev;
+ hmp->timer.function = &hamachi_timer; /* timer handler */
+ add_timer(&hmp->timer);
+
+ return 0;
+}
+
+static inline int hamachi_tx(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+
+ /* Update the dirty pointer until we find an entry that is
+ still owned by the card */
+ for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) {
+ int entry = hmp->dirty_tx % TX_RING_SIZE;
+ struct sk_buff *skb;
+
+ if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
+ break;
+ /* Free the original skb. */
+ skb = hmp->tx_skbuff[entry];
+ if (skb != 0) {
+ pci_unmap_single(hmp->pci_dev,
+ hmp->tx_ring[entry].addr, skb->len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb(skb);
+ hmp->tx_skbuff[entry] = NULL;
+ }
+ hmp->tx_ring[entry].status_n_length = 0;
+ if (entry >= TX_RING_SIZE-1)
+ hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
+ cpu_to_le32(DescEndRing);
+ hmp->stats.tx_packets++;
+ }
+
+ return 0;
+}
+
+static void hamachi_timer(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ int next_tick = 10*HZ;
+
+ if (hamachi_debug > 2) {
+ printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA "
+ "%4.4x.\n", dev->name, readw(ioaddr + ANStatus),
+ readw(ioaddr + ANLinkPartnerAbility));
+ printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x "
+ "%4.4x %4.4x %4.4x.\n", dev->name,
+ readw(ioaddr + 0x0e0),
+ readw(ioaddr + 0x0e2),
+ readw(ioaddr + 0x0e4),
+ readw(ioaddr + 0x0e6),
+ readw(ioaddr + 0x0e8),
+ readw(ioaddr + 0x0eA));
+ }
+ /* We could do something here... nah. */
+ hmp->timer.expires = RUN_AT(next_tick);
+ add_timer(&hmp->timer);
+}
+
+static void hamachi_tx_timeout(struct net_device *dev)
+{
+ int i;
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+
+ printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x,"
+ " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
+
+ {
+ int i;
+ printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring);
+ for (i = 0; i < RX_RING_SIZE; i++)
+ printk(" %8.8x", (unsigned int)hmp->rx_ring[i].status_n_length);
+ printk("\n"KERN_DEBUG" Tx ring %p: ", hmp->tx_ring);
+ for (i = 0; i < TX_RING_SIZE; i++)
+ printk(" %4.4x", hmp->tx_ring[i].status_n_length);
+ printk("\n");
+ }
+
+ /* Reinit the hardware and make sure the Rx and Tx processes
+ are up and running.
+ */
+ dev->if_port = 0;
+ /* The right way to do Reset. -KDU
+ * -Clear OWN bit in all Rx/Tx descriptors
+ * -Wait 50 uS for channels to go idle
+ * -Turn off MAC receiver
+ * -Issue Reset
+ */
+
+ for (i = 0; i < RX_RING_SIZE; i++)
+ hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn);
+
+ /* Presume that all packets in the Tx queue are gone if we have to
+ * re-init the hardware.
+ */
+ for (i = 0; i < TX_RING_SIZE; i++){
+ struct sk_buff *skb;
+
+ if (i >= TX_RING_SIZE - 1)
+ hmp->tx_ring[i].status_n_length = cpu_to_le32(
+ DescEndRing |
+ (hmp->tx_ring[i].status_n_length & 0x0000FFFF));
+ else
+ hmp->tx_ring[i].status_n_length &= 0x0000ffff;
+ skb = hmp->tx_skbuff[i];
+ if (skb){
+ pci_unmap_single(hmp->pci_dev, hmp->tx_ring[i].addr,
+ skb->len, PCI_DMA_TODEVICE);
+ dev_kfree_skb(skb);
+ hmp->tx_skbuff[i] = NULL;
+ }
+ }
+
+ udelay(60); /* Sleep 60 us just for safety sake */
+ writew(0x0002, ioaddr + RxCmd); /* STOP Rx */
+
+ writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */
+
+ hmp->tx_full = 0;
+ hmp->cur_rx = hmp->cur_tx = 0;
+ hmp->dirty_rx = hmp->dirty_tx = 0;
+ /* Rx packets are also presumed lost; however, we need to make sure a
+ * ring of buffers is in tact. -KDU
+ */
+ for (i = 0; i < RX_RING_SIZE; i++){
+ struct sk_buff *skb = hmp->rx_skbuff[i];
+
+ if (skb){
+ pci_unmap_single(hmp->pci_dev, hmp->rx_ring[i].addr,
+ hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(skb);
+ hmp->rx_skbuff[i] = NULL;
+ }
+ }
+ /* Fill in the Rx buffers. Handle allocation failure gracefully. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
+ hmp->rx_skbuff[i] = skb;
+ if (skb == NULL)
+ break;
+ skb->dev = dev; /* Mark as being used by this device. */
+ skb_reserve(skb, 2); /* 16 byte align the IP header. */
+ hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
+ skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
+ hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
+ DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2));
+ }
+ hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+ /* Mark the last entry as wrapping the ring. */
+ hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
+
+ /* Trigger an immediate transmit demand. */
+ dev->trans_start = jiffies;
+ hmp->stats.tx_errors++;
+
+ /* Restart the chip's Tx/Rx processes . */
+ writew(0x0002, ioaddr + TxCmd); /* STOP Tx */
+ writew(0x0001, ioaddr + TxCmd); /* START Tx */
+ writew(0x0001, ioaddr + RxCmd); /* START Rx */
+
+ netif_wake_queue(dev);
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void hamachi_init_ring(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ int i;
+
+ hmp->tx_full = 0;
+ hmp->cur_rx = hmp->cur_tx = 0;
+ hmp->dirty_rx = hmp->dirty_tx = 0;
+
+#if 0
+ /* This is wrong. I'm not sure what the original plan was, but this
+ * is wrong. An MTU of 1 gets you a buffer of 1536, while an MTU
+ * of 1501 gets a buffer of 1533? -KDU
+ */
+ hmp->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
+#endif
+ /* My attempt at a reasonable correction */
+ /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
+ * card needs room to do 8 byte alignment, +2 so we can reserve
+ * the first 2 bytes, and +16 gets room for the status word from the
+ * card. -KDU
+ */
+ hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ :
+ (((dev->mtu+26+7) & ~7) + 2 + 16));
+
+ /* Initialize all Rx descriptors. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ hmp->rx_ring[i].status_n_length = 0;
+ hmp->rx_skbuff[i] = NULL;
+ }
+ /* Fill in the Rx buffers. Handle allocation failure gracefully. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
+ hmp->rx_skbuff[i] = skb;
+ if (skb == NULL)
+ break;
+ skb->dev = dev; /* Mark as being used by this device. */
+ skb_reserve(skb, 2); /* 16 byte align the IP header. */
+ hmp->rx_ring[i].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
+ skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
+ /* -2 because it doesn't REALLY have that first 2 bytes -KDU */
+ hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn |
+ DescEndPacket | DescIntr | (hmp->rx_buf_sz -2));
+ }
+ hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+ hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
+
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ hmp->tx_skbuff[i] = NULL;
+ hmp->tx_ring[i].status_n_length = 0;
+ }
+ /* Mark the last entry of the ring */
+ hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
+
+ return;
+}
+
+
+#ifdef TX_CHECKSUM
+#define csum_add(it, val) \
+do { \
+ it += (u16) (val); \
+ if (it & 0xffff0000) { \
+ it &= 0xffff; \
+ ++it; \
+ } \
+} while (0)
+ /* printk("add %04x --> %04x\n", val, it); \ */
+
+/* uh->len already network format, do not swap */
+#define pseudo_csum_udp(sum,ih,uh) do { \
+ sum = 0; \
+ csum_add(sum, (ih)->saddr >> 16); \
+ csum_add(sum, (ih)->saddr & 0xffff); \
+ csum_add(sum, (ih)->daddr >> 16); \
+ csum_add(sum, (ih)->daddr & 0xffff); \
+ csum_add(sum, __constant_htons(IPPROTO_UDP)); \
+ csum_add(sum, (uh)->len); \
+} while (0)
+
+/* swap len */
+#define pseudo_csum_tcp(sum,ih,len) do { \
+ sum = 0; \
+ csum_add(sum, (ih)->saddr >> 16); \
+ csum_add(sum, (ih)->saddr & 0xffff); \
+ csum_add(sum, (ih)->daddr >> 16); \
+ csum_add(sum, (ih)->daddr & 0xffff); \
+ csum_add(sum, __constant_htons(IPPROTO_TCP)); \
+ csum_add(sum, htons(len)); \
+} while (0)
+#endif
+
+static int hamachi_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ unsigned entry;
+ u16 status;
+
+ /* Ok, now make sure that the queue has space before trying to
+ add another skbuff. if we return non-zero the scheduler
+ should interpret this as a queue full and requeue the buffer
+ for later.
+ */
+ if (hmp->tx_full) {
+ /* We should NEVER reach this point -KDU */
+ printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx);
+
+ /* Wake the potentially-idle transmit channel. */
+ /* If we don't need to read status, DON'T -KDU */
+ status=readw(hmp->base + TxStatus);
+ if( !(status & 0x0001) || (status & 0x0002))
+ writew(0x0001, hmp->base + TxCmd);
+ return 1;
+ }
+
+ /* Caution: the write order is important here, set the field
+ with the "ownership" bits last. */
+
+ /* Calculate the next Tx descriptor entry. */
+ entry = hmp->cur_tx % TX_RING_SIZE;
+
+ hmp->tx_skbuff[entry] = skb;
+
+#ifdef TX_CHECKSUM
+ {
+ /* tack on checksum tag */
+ u32 tagval = 0;
+ struct ethhdr *eh = (struct ethhdr *)skb->data;
+ if (eh->h_proto == __constant_htons(ETH_P_IP)) {
+ struct iphdr *ih = (struct iphdr *)((char *)eh + ETH_HLEN);
+ if (ih->protocol == IPPROTO_UDP) {
+ struct udphdr *uh
+ = (struct udphdr *)((char *)ih + ih->ihl*4);
+ u32 offset = ((unsigned char *)uh + 6) - skb->data;
+ u32 pseudo;
+ pseudo_csum_udp(pseudo, ih, uh);
+ pseudo = htons(pseudo);
+ printk("udp cksum was %04x, sending pseudo %04x\n",
+ uh->check, pseudo);
+ uh->check = 0; /* zero out uh->check before card calc */
+ /*
+ * start at 14 (skip ethhdr), store at offset (uh->check),
+ * use pseudo value given.
+ */
+ tagval = (14 << 24) | (offset << 16) | pseudo;
+ } else if (ih->protocol == IPPROTO_TCP) {
+ printk("tcp, no auto cksum\n");
+ }
+ }
+ *(u32 *)skb_push(skb, 8) = tagval;
+ }
+#endif
+
+ hmp->tx_ring[entry].addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
+ skb->data, skb->len, PCI_DMA_TODEVICE));
+
+ /* Hmmmm, could probably put a DescIntr on these, but the way
+ the driver is currently coded makes Tx interrupts unnecessary
+ since the clearing of the Tx ring is handled by the start_xmit
+ routine. This organization helps mitigate the interrupts a
+ bit and probably renders the max_tx_latency param useless.
+
+ Update: Putting a DescIntr bit on all of the descriptors and
+ mitigating interrupt frequency with the tx_min_pkt parameter. -KDU
+ */
+ if (entry >= TX_RING_SIZE-1) /* Wrap ring */
+ hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
+ DescEndPacket | DescEndRing | DescIntr | skb->len);
+ else
+ hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn |
+ DescEndPacket | DescIntr | skb->len);
+ hmp->cur_tx++;
+
+ /* Non-x86 Todo: explicitly flush cache lines here. */
+
+ /* Wake the potentially-idle transmit channel. */
+ /* If we don't need to read status, DON'T -KDU */
+ status=readw(hmp->base + TxStatus);
+ if( !(status & 0x0001) || (status & 0x0002))
+ writew(0x0001, hmp->base + TxCmd);
+
+ /* Immediately before returning, let's clear as many entries as we can. */
+ hamachi_tx(dev);
+
+ /* We should kick the bottom half here, since we are not accepting
+ * interrupts with every packet. i.e. realize that Gigabit ethernet
+ * can transmit faster than ordinary machines can load packets;
+ * hence, any packet that got put off because we were in the transmit
+ * routine should IMMEDIATELY get a chance to be re-queued. -KDU
+ */
+ if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4))
+ netif_wake_queue(dev); /* Typical path */
+ else {
+ hmp->tx_full = 1;
+ netif_stop_queue(dev);
+ }
+ dev->trans_start = jiffies;
+
+ if (hamachi_debug > 4) {
+ printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n",
+ dev->name, hmp->cur_tx, entry);
+ }
+ return 0;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+ after the Tx thread. */
+static irqreturn_t hamachi_interrupt(int irq, void *dev_instance, struct pt_regs *rgs)
+{
+ struct net_device *dev = dev_instance;
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ long boguscnt = max_interrupt_work;
+ int handled = 0;
+
+#ifndef final_version /* Can never occur. */
+ if (dev == NULL) {
+ printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq);
+ return IRQ_NONE;
+ }
+#endif
+
+ spin_lock(&hmp->lock);
+
+ do {
+ u32 intr_status = readl(ioaddr + InterruptClear);
+
+ if (hamachi_debug > 4)
+ printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n",
+ dev->name, intr_status);
+
+ if (intr_status == 0)
+ break;
+
+ handled = 1;
+
+ if (intr_status & IntrRxDone)
+ hamachi_rx(dev);
+
+ if (intr_status & IntrTxDone){
+ /* This code should RARELY need to execute. After all, this is
+ * a gigabit link, it should consume packets as fast as we put
+ * them in AND we clear the Tx ring in hamachi_start_xmit().
+ */
+ if (hmp->tx_full){
+ for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){
+ int entry = hmp->dirty_tx % TX_RING_SIZE;
+ struct sk_buff *skb;
+
+ if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn))
+ break;
+ skb = hmp->tx_skbuff[entry];
+ /* Free the original skb. */
+ if (skb){
+ pci_unmap_single(hmp->pci_dev,
+ hmp->tx_ring[entry].addr,
+ skb->len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(skb);
+ hmp->tx_skbuff[entry] = NULL;
+ }
+ hmp->tx_ring[entry].status_n_length = 0;
+ if (entry >= TX_RING_SIZE-1)
+ hmp->tx_ring[TX_RING_SIZE-1].status_n_length |=
+ cpu_to_le32(DescEndRing);
+ hmp->stats.tx_packets++;
+ }
+ if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){
+ /* The ring is no longer full */
+ hmp->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+ } else {
+ netif_wake_queue(dev);
+ }
+ }
+
+
+ /* Abnormal error summary/uncommon events handlers. */
+ if (intr_status &
+ (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr |
+ LinkChange | NegotiationChange | StatsMax))
+ hamachi_error(dev, intr_status);
+
+ if (--boguscnt < 0) {
+ printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n",
+ dev->name, intr_status);
+ break;
+ }
+ } while (1);
+
+ if (hamachi_debug > 3)
+ printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
+ dev->name, readl(ioaddr + IntrStatus));
+
+#ifndef final_version
+ /* Code that should never be run! Perhaps remove after testing.. */
+ {
+ static int stopit = 10;
+ if (dev->start == 0 && --stopit < 0) {
+ printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n",
+ dev->name);
+ free_irq(irq, dev);
+ }
+ }
+#endif
+
+ spin_unlock(&hmp->lock);
+ return IRQ_RETVAL(handled);
+}
+
+/* This routine is logically part of the interrupt handler, but separated
+ for clarity and better register allocation. */
+static int hamachi_rx(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ int entry = hmp->cur_rx % RX_RING_SIZE;
+ int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx;
+
+ if (hamachi_debug > 4) {
+ printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n",
+ entry, hmp->rx_ring[entry].status_n_length);
+ }
+
+ /* If EOP is set on the next entry, it's a new packet. Send it up. */
+ while (1) {
+ struct hamachi_desc *desc = &(hmp->rx_ring[entry]);
+ u32 desc_status = le32_to_cpu(desc->status_n_length);
+ u16 data_size = desc_status; /* Implicit truncate */
+ u8 *buf_addr;
+ s32 frame_status;
+
+ if (desc_status & DescOwn)
+ break;
+ pci_dma_sync_single_for_cpu(hmp->pci_dev,
+ desc->addr,
+ hmp->rx_buf_sz,
+ PCI_DMA_FROMDEVICE);
+ buf_addr = (u8 *) hmp->rx_skbuff[entry]->tail;
+ frame_status = le32_to_cpu(get_unaligned((s32*)&(buf_addr[data_size - 12])));
+ if (hamachi_debug > 4)
+ printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n",
+ frame_status);
+ if (--boguscnt < 0)
+ break;
+ if ( ! (desc_status & DescEndPacket)) {
+ printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
+ "multiple buffers, entry %#x length %d status %4.4x!\n",
+ dev->name, hmp->cur_rx, data_size, desc_status);
+ printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n",
+ dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]);
+ printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n",
+ dev->name,
+ hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0xffff0000,
+ hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length & 0x0000ffff,
+ hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length);
+ hmp->stats.rx_length_errors++;
+ } /* else Omit for prototype errata??? */
+ if (frame_status & 0x00380000) {
+ /* There was an error. */
+ if (hamachi_debug > 2)
+ printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n",
+ frame_status);
+ hmp->stats.rx_errors++;
+ if (frame_status & 0x00600000) hmp->stats.rx_length_errors++;
+ if (frame_status & 0x00080000) hmp->stats.rx_frame_errors++;
+ if (frame_status & 0x00100000) hmp->stats.rx_crc_errors++;
+ if (frame_status < 0) hmp->stats.rx_dropped++;
+ } else {
+ struct sk_buff *skb;
+ /* Omit CRC */
+ u16 pkt_len = (frame_status & 0x07ff) - 4;
+#ifdef RX_CHECKSUM
+ u32 pfck = *(u32 *) &buf_addr[data_size - 8];
+#endif
+
+
+#ifndef final_version
+ if (hamachi_debug > 4)
+ printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d"
+ " of %d, bogus_cnt %d.\n",
+ pkt_len, data_size, boguscnt);
+ if (hamachi_debug > 5)
+ printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n",
+ dev->name,
+ *(s32*)&(buf_addr[data_size - 20]),
+ *(s32*)&(buf_addr[data_size - 16]),
+ *(s32*)&(buf_addr[data_size - 12]),
+ *(s32*)&(buf_addr[data_size - 8]),
+ *(s32*)&(buf_addr[data_size - 4]));
+#endif
+ /* Check if the packet is long enough to accept without copying
+ to a minimally-sized skbuff. */
+ if (pkt_len < rx_copybreak
+ && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+#ifdef RX_CHECKSUM
+ printk(KERN_ERR "%s: rx_copybreak non-zero "
+ "not good with RX_CHECKSUM\n", dev->name);
+#endif
+ skb->dev = dev;
+ skb_reserve(skb, 2); /* 16 byte align the IP header */
+ pci_dma_sync_single_for_cpu(hmp->pci_dev,
+ hmp->rx_ring[entry].addr,
+ hmp->rx_buf_sz,
+ PCI_DMA_FROMDEVICE);
+ /* Call copy + cksum if available. */
+#if 1 || USE_IP_COPYSUM
+ eth_copy_and_sum(skb,
+ hmp->rx_skbuff[entry]->data, pkt_len, 0);
+ skb_put(skb, pkt_len);
+#else
+ memcpy(skb_put(skb, pkt_len), hmp->rx_ring_dma
+ + entry*sizeof(*desc), pkt_len);
+#endif
+ pci_dma_sync_single_for_device(hmp->pci_dev,
+ hmp->rx_ring[entry].addr,
+ hmp->rx_buf_sz,
+ PCI_DMA_FROMDEVICE);
+ } else {
+ pci_unmap_single(hmp->pci_dev,
+ hmp->rx_ring[entry].addr,
+ hmp->rx_buf_sz, PCI_DMA_FROMDEVICE);
+ skb_put(skb = hmp->rx_skbuff[entry], pkt_len);
+ hmp->rx_skbuff[entry] = NULL;
+ }
+ skb->protocol = eth_type_trans(skb, dev);
+
+
+#ifdef RX_CHECKSUM
+ /* TCP or UDP on ipv4, DIX encoding */
+ if (pfck>>24 == 0x91 || pfck>>24 == 0x51) {
+ struct iphdr *ih = (struct iphdr *) skb->data;
+ /* Check that IP packet is at least 46 bytes, otherwise,
+ * there may be pad bytes included in the hardware checksum.
+ * This wouldn't happen if everyone padded with 0.
+ */
+ if (ntohs(ih->tot_len) >= 46){
+ /* don't worry about frags */
+ if (!(ih->frag_off & __constant_htons(IP_MF|IP_OFFSET))) {
+ u32 inv = *(u32 *) &buf_addr[data_size - 16];
+ u32 *p = (u32 *) &buf_addr[data_size - 20];
+ register u32 crc, p_r, p_r1;
+
+ if (inv & 4) {
+ inv &= ~4;
+ --p;
+ }
+ p_r = *p;
+ p_r1 = *(p-1);
+ switch (inv) {
+ case 0:
+ crc = (p_r & 0xffff) + (p_r >> 16);
+ break;
+ case 1:
+ crc = (p_r >> 16) + (p_r & 0xffff)
+ + (p_r1 >> 16 & 0xff00);
+ break;
+ case 2:
+ crc = p_r + (p_r1 >> 16);
+ break;
+ case 3:
+ crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16);
+ break;
+ default: /*NOTREACHED*/ crc = 0;
+ }
+ if (crc & 0xffff0000) {
+ crc &= 0xffff;
+ ++crc;
+ }
+ /* tcp/udp will add in pseudo */
+ skb->csum = ntohs(pfck & 0xffff);
+ if (skb->csum > crc)
+ skb->csum -= crc;
+ else
+ skb->csum += (~crc & 0xffff);
+ /*
+ * could do the pseudo myself and return
+ * CHECKSUM_UNNECESSARY
+ */
+ skb->ip_summed = CHECKSUM_HW;
+ }
+ }
+ }
+#endif /* RX_CHECKSUM */
+
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+ hmp->stats.rx_packets++;
+ }
+ entry = (++hmp->cur_rx) % RX_RING_SIZE;
+ }
+
+ /* Refill the Rx ring buffers. */
+ for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) {
+ struct hamachi_desc *desc;
+
+ entry = hmp->dirty_rx % RX_RING_SIZE;
+ desc = &(hmp->rx_ring[entry]);
+ if (hmp->rx_skbuff[entry] == NULL) {
+ struct sk_buff *skb = dev_alloc_skb(hmp->rx_buf_sz);
+
+ hmp->rx_skbuff[entry] = skb;
+ if (skb == NULL)
+ break; /* Better luck next round. */
+ skb->dev = dev; /* Mark as being used by this device. */
+ skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
+ desc->addr = cpu_to_leXX(pci_map_single(hmp->pci_dev,
+ skb->tail, hmp->rx_buf_sz, PCI_DMA_FROMDEVICE));
+ }
+ desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz);
+ if (entry >= RX_RING_SIZE-1)
+ desc->status_n_length |= cpu_to_le32(DescOwn |
+ DescEndPacket | DescEndRing | DescIntr);
+ else
+ desc->status_n_length |= cpu_to_le32(DescOwn |
+ DescEndPacket | DescIntr);
+ }
+
+ /* Restart Rx engine if stopped. */
+ /* If we don't need to check status, don't. -KDU */
+ if (readw(hmp->base + RxStatus) & 0x0002)
+ writew(0x0001, hmp->base + RxCmd);
+
+ return 0;
+}
+
+/* This is more properly named "uncommon interrupt events", as it covers more
+ than just errors. */
+static void hamachi_error(struct net_device *dev, int intr_status)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+
+ if (intr_status & (LinkChange|NegotiationChange)) {
+ if (hamachi_debug > 1)
+ printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl"
+ " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n",
+ dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2),
+ readw(ioaddr + ANLinkPartnerAbility),
+ readl(ioaddr + IntrStatus));
+ if (readw(ioaddr + ANStatus) & 0x20)
+ writeb(0x01, ioaddr + LEDCtrl);
+ else
+ writeb(0x03, ioaddr + LEDCtrl);
+ }
+ if (intr_status & StatsMax) {
+ hamachi_get_stats(dev);
+ /* Read the overflow bits to clear. */
+ readl(ioaddr + 0x370);
+ readl(ioaddr + 0x3F0);
+ }
+ if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone))
+ && hamachi_debug)
+ printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
+ dev->name, intr_status);
+ /* Hmmmmm, it's not clear how to recover from PCI faults. */
+ if (intr_status & (IntrTxPCIErr | IntrTxPCIFault))
+ hmp->stats.tx_fifo_errors++;
+ if (intr_status & (IntrRxPCIErr | IntrRxPCIFault))
+ hmp->stats.rx_fifo_errors++;
+}
+
+static int hamachi_close(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+ struct sk_buff *skb;
+ int i;
+
+ netif_stop_queue(dev);
+
+ if (hamachi_debug > 1) {
+ printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n",
+ dev->name, readw(ioaddr + TxStatus),
+ readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus));
+ printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
+ dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx);
+ }
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ writel(0x0000, ioaddr + InterruptEnable);
+
+ /* Stop the chip's Tx and Rx processes. */
+ writel(2, ioaddr + RxCmd);
+ writew(2, ioaddr + TxCmd);
+
+#ifdef __i386__
+ if (hamachi_debug > 2) {
+ printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
+ (int)hmp->tx_ring_dma);
+ for (i = 0; i < TX_RING_SIZE; i++)
+ printk(" %c #%d desc. %8.8x %8.8x.\n",
+ readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ',
+ i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr);
+ printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
+ (int)hmp->rx_ring_dma);
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n",
+ readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ',
+ i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr);
+ if (hamachi_debug > 6) {
+ if (*(u8*)hmp->rx_skbuff[i]->tail != 0x69) {
+ u16 *addr = (u16 *)
+ hmp->rx_skbuff[i]->tail;
+ int j;
+
+ for (j = 0; j < 0x50; j++)
+ printk(" %4.4x", addr[j]);
+ printk("\n");
+ }
+ }
+ }
+ }
+#endif /* __i386__ debugging only */
+
+ free_irq(dev->irq, dev);
+
+ del_timer_sync(&hmp->timer);
+
+ /* Free all the skbuffs in the Rx queue. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ skb = hmp->rx_skbuff[i];
+ hmp->rx_ring[i].status_n_length = 0;
+ hmp->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
+ if (skb) {
+ pci_unmap_single(hmp->pci_dev,
+ hmp->rx_ring[i].addr, hmp->rx_buf_sz,
+ PCI_DMA_FROMDEVICE);
+ dev_kfree_skb(skb);
+ hmp->rx_skbuff[i] = NULL;
+ }
+ }
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ skb = hmp->tx_skbuff[i];
+ if (skb) {
+ pci_unmap_single(hmp->pci_dev,
+ hmp->tx_ring[i].addr, skb->len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb(skb);
+ hmp->tx_skbuff[i] = NULL;
+ }
+ }
+
+ writeb(0x00, ioaddr + LEDCtrl);
+
+ return 0;
+}
+
+static struct net_device_stats *hamachi_get_stats(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+
+ /* We should lock this segment of code for SMP eventually, although
+ the vulnerability window is very small and statistics are
+ non-critical. */
+ /* Ok, what goes here? This appears to be stuck at 21 packets
+ according to ifconfig. It does get incremented in hamachi_tx(),
+ so I think I'll comment it out here and see if better things
+ happen.
+ */
+ /* hmp->stats.tx_packets = readl(ioaddr + 0x000); */
+
+ hmp->stats.rx_bytes = readl(ioaddr + 0x330); /* Total Uni+Brd+Multi */
+ hmp->stats.tx_bytes = readl(ioaddr + 0x3B0); /* Total Uni+Brd+Multi */
+ hmp->stats.multicast = readl(ioaddr + 0x320); /* Multicast Rx */
+
+ hmp->stats.rx_length_errors = readl(ioaddr + 0x368); /* Over+Undersized */
+ hmp->stats.rx_over_errors = readl(ioaddr + 0x35C); /* Jabber */
+ hmp->stats.rx_crc_errors = readl(ioaddr + 0x360); /* Jabber */
+ hmp->stats.rx_frame_errors = readl(ioaddr + 0x364); /* Symbol Errs */
+ hmp->stats.rx_missed_errors = readl(ioaddr + 0x36C); /* Dropped */
+
+ return &hmp->stats;
+}
+
+static void set_rx_mode(struct net_device *dev)
+{
+ struct hamachi_private *hmp = netdev_priv(dev);
+ void __iomem *ioaddr = hmp->base;
+
+ if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
+ /* Unconditionally log net taps. */
+ printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
+ writew(0x000F, ioaddr + AddrMode);
+ } else if ((dev->mc_count > 63) || (dev->flags & IFF_ALLMULTI)) {
+ /* Too many to match, or accept all multicasts. */
+ writew(0x000B, ioaddr + AddrMode);
+ } else if (dev->mc_count > 0) { /* Must use the CAM filter. */
+ struct dev_mc_list *mclist;
+ int i;
+ for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+ i++, mclist = mclist->next) {
+ writel(*(u32*)(mclist->dmi_addr), ioaddr + 0x100 + i*8);
+ writel(0x20000 | (*(u16*)&mclist->dmi_addr[4]),
+ ioaddr + 0x104 + i*8);
+ }
+ /* Clear remaining entries. */
+ for (; i < 64; i++)
+ writel(0, ioaddr + 0x104 + i*8);
+ writew(0x0003, ioaddr + AddrMode);
+ } else { /* Normal, unicast/broadcast-only mode. */
+ writew(0x0001, ioaddr + AddrMode);
+ }
+}
+
+static int check_if_running(struct net_device *dev)
+{
+ if (!netif_running(dev))
+ return -EINVAL;
+ return 0;
+}
+
+static void hamachi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, pci_name(np->pci_dev));
+}
+
+static int hamachi_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ spin_lock_irq(&np->lock);
+ mii_ethtool_gset(&np->mii_if, ecmd);
+ spin_unlock_irq(&np->lock);
+ return 0;
+}
+
+static int hamachi_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ int res;
+ spin_lock_irq(&np->lock);
+ res = mii_ethtool_sset(&np->mii_if, ecmd);
+ spin_unlock_irq(&np->lock);
+ return res;
+}
+
+static int hamachi_nway_reset(struct net_device *dev)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ return mii_nway_restart(&np->mii_if);
+}
+
+static u32 hamachi_get_link(struct net_device *dev)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ return mii_link_ok(&np->mii_if);
+}
+
+static struct ethtool_ops ethtool_ops = {
+ .begin = check_if_running,
+ .get_drvinfo = hamachi_get_drvinfo,
+ .get_settings = hamachi_get_settings,
+ .set_settings = hamachi_set_settings,
+ .nway_reset = hamachi_nway_reset,
+ .get_link = hamachi_get_link,
+};
+
+static struct ethtool_ops ethtool_ops_no_mii = {
+ .begin = check_if_running,
+ .get_drvinfo = hamachi_get_drvinfo,
+};
+
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct hamachi_private *np = netdev_priv(dev);
+ struct mii_ioctl_data *data = if_mii(rq);
+ int rc;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (cmd == (SIOCDEVPRIVATE+3)) { /* set rx,tx intr params */
+ u32 *d = (u32 *)&rq->ifr_ifru;
+ /* Should add this check here or an ordinary user can do nasty
+ * things. -KDU
+ *
+ * TODO: Shut down the Rx and Tx engines while doing this.
+ */
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ writel(d[0], np->base + TxIntrCtrl);
+ writel(d[1], np->base + RxIntrCtrl);
+ printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name,
+ (u32) readl(np->base + TxIntrCtrl),
+ (u32) readl(np->base + RxIntrCtrl));
+ rc = 0;
+ }
+
+ else {
+ spin_lock_irq(&np->lock);
+ rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
+ spin_unlock_irq(&np->lock);
+ }
+
+ return rc;
+}
+
+
+static void __devexit hamachi_remove_one (struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+
+ if (dev) {
+ struct hamachi_private *hmp = netdev_priv(dev);
+
+ pci_free_consistent(pdev, RX_TOTAL_SIZE, hmp->rx_ring,
+ hmp->rx_ring_dma);
+ pci_free_consistent(pdev, TX_TOTAL_SIZE, hmp->tx_ring,
+ hmp->tx_ring_dma);
+ unregister_netdev(dev);
+ iounmap(hmp->base);
+ free_netdev(dev);
+ pci_release_regions(pdev);
+ pci_set_drvdata(pdev, NULL);
+ }
+}
+
+static struct pci_device_id hamachi_pci_tbl[] = {
+ { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl);
+
+static struct pci_driver hamachi_driver = {
+ .name = DRV_NAME,
+ .id_table = hamachi_pci_tbl,
+ .probe = hamachi_init_one,
+ .remove = __devexit_p(hamachi_remove_one),
+};
+
+static int __init hamachi_init (void)
+{
+/* when a module, this is printed whether or not devices are found in probe */
+#ifdef MODULE
+ printk(version);
+#endif
+ return pci_register_driver(&hamachi_driver);
+}
+
+static void __exit hamachi_exit (void)
+{
+ pci_unregister_driver(&hamachi_driver);
+}
+
+
+module_init(hamachi_init);
+module_exit(hamachi_exit);