diff options
Diffstat (limited to 'drivers/net/hamachi.c')
| -rw-r--r-- | drivers/net/hamachi.c | 2024 |
1 files changed, 2024 insertions, 0 deletions
diff --git a/drivers/net/hamachi.c b/drivers/net/hamachi.c new file mode 100644 index 000000000000..3d96714ed3cf --- /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); |