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ddfce6bb43
Fix some of the easy warnings in network device drivers. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2016 lines
65 KiB
C
2016 lines
65 KiB
C
/* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */
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/*
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Written 1998-2000 by Donald Becker.
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Updates 2000 by Keith Underwood.
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This software may be used and distributed according to the terms of
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the GNU General Public License (GPL), incorporated herein by reference.
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Drivers based on or derived from this code fall under the GPL and must
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retain the authorship, copyright and license notice. This file is not
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a complete program and may only be used when the entire operating
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system is licensed under the GPL.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation
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410 Severn Ave., Suite 210
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Annapolis MD 21403
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This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet
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adapter.
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Support and updates available at
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http://www.scyld.com/network/hamachi.html
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[link no longer provides useful info -jgarzik]
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or
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http://www.parl.clemson.edu/~keithu/hamachi.html
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*/
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#define DRV_NAME "hamachi"
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#define DRV_VERSION "2.1"
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#define DRV_RELDATE "Sept 11, 2006"
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/* A few user-configurable values. */
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static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
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#define final_version
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#define hamachi_debug debug
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/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
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static int max_interrupt_work = 40;
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static int mtu;
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/* Default values selected by testing on a dual processor PIII-450 */
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/* These six interrupt control parameters may be set directly when loading the
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* module, or through the rx_params and tx_params variables
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*/
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static int max_rx_latency = 0x11;
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static int max_rx_gap = 0x05;
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static int min_rx_pkt = 0x18;
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static int max_tx_latency = 0x00;
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static int max_tx_gap = 0x00;
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static int min_tx_pkt = 0x30;
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/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
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-Setting to > 1518 causes all frames to be copied
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-Setting to 0 disables copies
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*/
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static int rx_copybreak;
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/* An override for the hardware detection of bus width.
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Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit.
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Add 2 to disable parity detection.
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*/
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static int force32;
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/* Used to pass the media type, etc.
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These exist for driver interoperability.
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No media types are currently defined.
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- The lower 4 bits are reserved for the media type.
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- The next three bits may be set to one of the following:
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0x00000000 : Autodetect PCI bus
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0x00000010 : Force 32 bit PCI bus
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0x00000020 : Disable parity detection
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0x00000040 : Force 64 bit PCI bus
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Default is autodetect
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- The next bit can be used to force half-duplex. This is a bad
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idea since no known implementations implement half-duplex, and,
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in general, half-duplex for gigabit ethernet is a bad idea.
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0x00000080 : Force half-duplex
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Default is full-duplex.
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- In the original driver, the ninth bit could be used to force
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full-duplex. Maintain that for compatibility
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0x00000200 : Force full-duplex
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*/
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#define MAX_UNITS 8 /* More are supported, limit only on options */
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static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
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static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
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/* The Hamachi chipset supports 3 parameters each for Rx and Tx
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* interruput management. Parameters will be loaded as specified into
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* the TxIntControl and RxIntControl registers.
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*
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* The registers are arranged as follows:
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* 23 - 16 15 - 8 7 - 0
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* _________________________________
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* | min_pkt | max_gap | max_latency |
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* ---------------------------------
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* min_pkt : The minimum number of packets processed between
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* interrupts.
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* max_gap : The maximum inter-packet gap in units of 8.192 us
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* max_latency : The absolute time between interrupts in units of 8.192 us
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*
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*/
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static int rx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
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static int tx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
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/* Operational parameters that are set at compile time. */
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/* Keep the ring sizes a power of two for compile efficiency.
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The compiler will convert <unsigned>'%'<2^N> into a bit mask.
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Making the Tx ring too large decreases the effectiveness of channel
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bonding and packet priority.
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There are no ill effects from too-large receive rings, except for
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excessive memory usage */
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/* Empirically it appears that the Tx ring needs to be a little bigger
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for these Gbit adapters or you get into an overrun condition really
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easily. Also, things appear to work a bit better in back-to-back
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configurations if the Rx ring is 8 times the size of the Tx ring
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*/
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#define TX_RING_SIZE 64
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#define RX_RING_SIZE 512
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#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct hamachi_desc)
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#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct hamachi_desc)
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/*
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* Enable netdev_ioctl. Added interrupt coalescing parameter adjustment.
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* 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov>
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*/
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/* play with 64-bit addrlen; seems to be a teensy bit slower --pw */
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/* #define ADDRLEN 64 */
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/*
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* RX_CHECKSUM turns on card-generated receive checksum generation for
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* TCP and UDP packets. Otherwise the upper layers do the calculation.
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* TX_CHECKSUM won't do anything too useful, even if it works. There's no
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* easy mechanism by which to tell the TCP/UDP stack that it need not
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* generate checksums for this device. But if somebody can find a way
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* to get that to work, most of the card work is in here already.
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* 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov>
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*/
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#undef TX_CHECKSUM
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#define RX_CHECKSUM
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/* Operational parameters that usually are not changed. */
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/* Time in jiffies before concluding the transmitter is hung. */
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#define TX_TIMEOUT (5*HZ)
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/time.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <linux/delay.h>
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#include <linux/bitops.h>
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#include <asm/uaccess.h>
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#include <asm/processor.h> /* Processor type for cache alignment. */
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#include <asm/io.h>
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#include <asm/unaligned.h>
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#include <asm/cache.h>
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static char version[] __devinitdata =
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KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n"
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KERN_INFO " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n"
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KERN_INFO " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n";
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/* IP_MF appears to be only defined in <netinet/ip.h>, however,
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we need it for hardware checksumming support. FYI... some of
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the definitions in <netinet/ip.h> conflict/duplicate those in
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other linux headers causing many compiler warnings.
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*/
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#ifndef IP_MF
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#define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */
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#endif
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/* Define IP_OFFSET to be IPOPT_OFFSET */
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#ifndef IP_OFFSET
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#ifdef IPOPT_OFFSET
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#define IP_OFFSET IPOPT_OFFSET
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#else
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#define IP_OFFSET 2
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#endif
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#endif
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#define RUN_AT(x) (jiffies + (x))
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#ifndef ADDRLEN
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#define ADDRLEN 32
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#endif
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/* Condensed bus+endian portability operations. */
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#if ADDRLEN == 64
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#define cpu_to_leXX(addr) cpu_to_le64(addr)
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#else
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#define cpu_to_leXX(addr) cpu_to_le32(addr)
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#endif
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/*
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Theory of Operation
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I. Board Compatibility
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This device driver is designed for the Packet Engines "Hamachi"
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Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit
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66Mhz PCI card.
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II. Board-specific settings
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No jumpers exist on the board. The chip supports software correction of
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various motherboard wiring errors, however this driver does not support
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that feature.
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III. Driver operation
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IIIa. Ring buffers
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The Hamachi uses a typical descriptor based bus-master architecture.
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The descriptor list is similar to that used by the Digital Tulip.
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This driver uses two statically allocated fixed-size descriptor lists
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formed into rings by a branch from the final descriptor to the beginning of
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the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
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This driver uses a zero-copy receive and transmit scheme similar my other
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network drivers.
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The driver allocates full frame size skbuffs for the Rx ring buffers at
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open() time and passes the skb->data field to the Hamachi as receive data
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buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
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a fresh skbuff is allocated and the frame is copied to the new skbuff.
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When the incoming frame is larger, the skbuff is passed directly up the
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protocol stack and replaced by a newly allocated skbuff.
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The RX_COPYBREAK value is chosen to trade-off the memory wasted by
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using a full-sized skbuff for small frames vs. the copying costs of larger
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frames. Gigabit cards are typically used on generously configured machines
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and the underfilled buffers have negligible impact compared to the benefit of
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a single allocation size, so the default value of zero results in never
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copying packets.
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IIIb/c. Transmit/Receive Structure
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The Rx and Tx descriptor structure are straight-forward, with no historical
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baggage that must be explained. Unlike the awkward DBDMA structure, there
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are no unused fields or option bits that had only one allowable setting.
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Two details should be noted about the descriptors: The chip supports both 32
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bit and 64 bit address structures, and the length field is overwritten on
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the receive descriptors. The descriptor length is set in the control word
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for each channel. The development driver uses 32 bit addresses only, however
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64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha.
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IIId. Synchronization
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This driver is very similar to my other network drivers.
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The driver runs as two independent, single-threaded flows of control. One
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is the send-packet routine, which enforces single-threaded use by the
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dev->tbusy flag. The other thread is the interrupt handler, which is single
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threaded by the hardware and other software.
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The send packet thread has partial control over the Tx ring and 'dev->tbusy'
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flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next
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queue slot is empty, it clears the tbusy flag when finished otherwise it sets
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the 'hmp->tx_full' flag.
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The interrupt handler has exclusive control over the Rx ring and records stats
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from the Tx ring. After reaping the stats, it marks the Tx queue entry as
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empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it
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clears both the tx_full and tbusy flags.
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IV. Notes
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Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards.
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IVb. References
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Hamachi Engineering Design Specification, 5/15/97
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(Note: This version was marked "Confidential".)
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IVc. Errata
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None noted.
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V. Recent Changes
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01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears
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to help avoid some stall conditions -- this needs further research.
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01/15/1999 EPK Creation of the hamachi_tx function. This function cleans
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the Tx ring and is called from hamachi_start_xmit (this used to be
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called from hamachi_interrupt but it tends to delay execution of the
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interrupt handler and thus reduce bandwidth by reducing the latency
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between hamachi_rx()'s). Notably, some modification has been made so
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that the cleaning loop checks only to make sure that the DescOwn bit
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isn't set in the status flag since the card is not required
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to set the entire flag to zero after processing.
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01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is
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checked before attempting to add a buffer to the ring. If the ring is full
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an attempt is made to free any dirty buffers and thus find space for
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the new buffer or the function returns non-zero which should case the
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scheduler to reschedule the buffer later.
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01/15/1999 EPK Some adjustments were made to the chip initialization.
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End-to-end flow control should now be fully active and the interrupt
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algorithm vars have been changed. These could probably use further tuning.
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01/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to
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set the rx and tx latencies for the Hamachi interrupts. If you're having
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problems with network stalls, try setting these to higher values.
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Valid values are 0x00 through 0xff.
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01/15/1999 EPK In general, the overall bandwidth has increased and
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latencies are better (sometimes by a factor of 2). Stalls are rare at
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this point, however there still appears to be a bug somewhere between the
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hardware and driver. TCP checksum errors under load also appear to be
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eliminated at this point.
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01/18/1999 EPK Ensured that the DescEndRing bit was being set on both the
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Rx and Tx rings. This appears to have been affecting whether a particular
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peer-to-peer connection would hang under high load. I believe the Rx
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rings was typically getting set correctly, but the Tx ring wasn't getting
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the DescEndRing bit set during initialization. ??? Does this mean the
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hamachi card is using the DescEndRing in processing even if a particular
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slot isn't in use -- hypothetically, the card might be searching the
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entire Tx ring for slots with the DescOwn bit set and then processing
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them. If the DescEndRing bit isn't set, then it might just wander off
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through memory until it hits a chunk of data with that bit set
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and then looping back.
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02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout
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problem (TxCmd and RxCmd need only to be set when idle or stopped.
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02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt.
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(Michel Mueller pointed out the ``permanently busy'' potential
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problem here).
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02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies.
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02/23/1999 EPK Verified that the interrupt status field bits for Tx were
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incorrectly defined and corrected (as per Michel Mueller).
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02/23/1999 EPK Corrected the Tx full check to check that at least 4 slots
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were available before reseting the tbusy and tx_full flags
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(as per Michel Mueller).
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03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support.
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12/31/1999 KDU Cleaned up assorted things and added Don's code to force
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32 bit.
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02/20/2000 KDU Some of the control was just plain odd. Cleaned up the
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hamachi_start_xmit() and hamachi_interrupt() code. There is still some
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re-structuring I would like to do.
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03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation
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parameters on a dual P3-450 setup yielded the new default interrupt
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mitigation parameters. Tx should interrupt VERY infrequently due to
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Eric's scheme. Rx should be more often...
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03/13/2000 KDU Added a patch to make the Rx Checksum code interact
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nicely with non-linux machines.
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03/13/2000 KDU Experimented with some of the configuration values:
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-It seems that enabling PCI performance commands for descriptors
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(changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal
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performance impact for any of my tests. (ttcp, netpipe, netperf) I will
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leave them that way until I hear further feedback.
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-Increasing the PCI_LATENCY_TIMER to 130
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(2 + (burst size of 128 * (0 wait states + 1))) seems to slightly
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degrade performance. Leaving default at 64 pending further information.
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03/14/2000 KDU Further tuning:
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-adjusted boguscnt in hamachi_rx() to depend on interrupt
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mitigation parameters chosen.
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-Selected a set of interrupt parameters based on some extensive testing.
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These may change with more testing.
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TO DO:
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-Consider borrowing from the acenic driver code to check PCI_COMMAND for
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PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in
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that case.
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-fix the reset procedure. It doesn't quite work.
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*/
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/* A few values that may be tweaked. */
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/* Size of each temporary Rx buffer, calculated as:
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* 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for
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* the card) + 8 bytes of status info + 8 bytes for the Rx Checksum +
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* 2 more because we use skb_reserve.
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*/
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#define PKT_BUF_SZ 1538
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/* For now, this is going to be set to the maximum size of an ethernet
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* packet. Eventually, we may want to make it a variable that is
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* related to the MTU
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*/
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#define MAX_FRAME_SIZE 1518
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/* The rest of these values should never change. */
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static void hamachi_timer(unsigned long data);
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enum capability_flags {CanHaveMII=1, };
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static const struct chip_info {
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u16 vendor_id, device_id, device_id_mask, pad;
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const char *name;
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void (*media_timer)(unsigned long data);
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int flags;
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} chip_tbl[] = {
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{0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0},
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{0,},
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};
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/* Offsets to the Hamachi registers. Various sizes. */
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enum hamachi_offsets {
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TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10,
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RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30,
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PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B,
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LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E,
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TxChecksum=0x074, RxChecksum=0x076,
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TxIntrCtrl=0x078, RxIntrCtrl=0x07C,
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InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088,
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EventStatus=0x08C,
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MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4,
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/* See enum MII_offsets below. */
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MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE,
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AddrMode=0x0D0, StationAddr=0x0D2,
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/* Gigabit AutoNegotiation. */
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ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8,
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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);
|
|
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 const struct ethtool_ops ethtool_ops;
|
|
static const 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;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
/* 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_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, %s, IRQ %d.\n",
|
|
dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev),
|
|
ioaddr, print_mac(mac, dev->dev_addr), 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, IRQF_SHARED, 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) {
|
|
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));
|
|
|
|
{
|
|
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->data, 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->data, 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 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]->data;
|
|
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_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
|
|
skb_copy_to_linear_data(skb,
|
|
hmp->rx_skbuff[entry]->data, pkt_len);
|
|
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_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
#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->data, 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]->data != 0x69) {
|
|
u16 *addr = (u16 *)
|
|
hmp->rx_skbuff[i]->data;
|
|
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. */
|
|
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 const 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 const 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);
|