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c2709020ad
add netpoll support Patch by Sven Schnelle <svens@gmx.de> Signed-off-by: Sven Schnelle <svens@gmx.de> Signed-off-by: Helge Deller <deller@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
1624 lines
42 KiB
C
1624 lines
42 KiB
C
/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
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munged into HPPA boxen .
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This driver is based upon 82596.c, original credits are below...
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but there were too many hoops which HP wants jumped through to
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keep this code in there in a sane manner.
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3 primary sources of the mess --
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1) hppa needs *lots* of cacheline flushing to keep this kind of
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MMIO running.
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2) The 82596 needs to see all of its pointers as their physical
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address. Thus virt_to_bus/bus_to_virt are *everywhere*.
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3) The implementation HP is using seems to be significantly pickier
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about when and how the command and RX units are started. some
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command ordering was changed.
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Examination of the mach driver leads one to believe that there
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might be a saner way to pull this off... anyone who feels like a
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full rewrite can be my guest.
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Split 02/13/2000 Sam Creasey (sammy@oh.verio.com)
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02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de)
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03/02/2000 changes for better/correct(?) cache-flushing (deller)
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*/
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/* 82596.c: A generic 82596 ethernet driver for linux. */
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/*
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Based on Apricot.c
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Written 1994 by Mark Evans.
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This driver is for the Apricot 82596 bus-master interface
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Modularised 12/94 Mark Evans
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Modified to support the 82596 ethernet chips on 680x0 VME boards.
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by Richard Hirst <richard@sleepie.demon.co.uk>
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Renamed to be 82596.c
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980825: Changed to receive directly in to sk_buffs which are
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allocated at open() time. Eliminates copy on incoming frames
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(small ones are still copied). Shared data now held in a
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non-cached page, so we can run on 68060 in copyback mode.
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TBD:
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* look at deferring rx frames rather than discarding (as per tulip)
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* handle tx ring full as per tulip
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* performace test to tune rx_copybreak
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Most of my modifications relate to the braindead big-endian
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implementation by Intel. When the i596 is operating in
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'big-endian' mode, it thinks a 32 bit value of 0x12345678
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should be stored as 0x56781234. This is a real pain, when
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you have linked lists which are shared by the 680x0 and the
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i596.
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Driver skeleton
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Written 1993 by Donald Becker.
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Copyright 1993 United States Government as represented by the Director,
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National Security Agency. This software may only be used and distributed
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according to the terms of the GNU General Public License as modified by SRC,
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incorporated herein by reference.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
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*/
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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/ptrace.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/delay.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/init.h>
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#include <linux/pci.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/irq.h>
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#include <asm/pdc.h>
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#include <asm/cache.h>
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#include <asm/parisc-device.h>
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#define LASI_82596_DRIVER_VERSION "LASI 82596 driver - Revision: 1.30"
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/* DEBUG flags
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*/
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#define DEB_INIT 0x0001
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#define DEB_PROBE 0x0002
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#define DEB_SERIOUS 0x0004
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#define DEB_ERRORS 0x0008
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#define DEB_MULTI 0x0010
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#define DEB_TDR 0x0020
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#define DEB_OPEN 0x0040
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#define DEB_RESET 0x0080
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#define DEB_ADDCMD 0x0100
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#define DEB_STATUS 0x0200
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#define DEB_STARTTX 0x0400
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#define DEB_RXADDR 0x0800
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#define DEB_TXADDR 0x1000
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#define DEB_RXFRAME 0x2000
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#define DEB_INTS 0x4000
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#define DEB_STRUCT 0x8000
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#define DEB_ANY 0xffff
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#define DEB(x,y) if (i596_debug & (x)) { y; }
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#define CHECK_WBACK(addr,len) \
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do { dma_cache_sync((void *)addr, len, DMA_TO_DEVICE); } while (0)
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#define CHECK_INV(addr,len) \
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do { dma_cache_sync((void *)addr, len, DMA_FROM_DEVICE); } while(0)
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#define CHECK_WBACK_INV(addr,len) \
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do { dma_cache_sync((void *)addr, len, DMA_BIDIRECTIONAL); } while (0)
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#define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/
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#define PA_CPU_PORT_L_ACCESS 4
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#define PA_CHANNEL_ATTENTION 8
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/*
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* Define various macros for Channel Attention, word swapping etc., dependent
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* on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
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*/
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#ifdef __BIG_ENDIAN
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#define WSWAPrfd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPrbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPiscp(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPscb(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPcmd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPtbd(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define WSWAPchar(x) (((u32)(x)<<16) | ((((u32)(x)))>>16))
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#define ISCP_BUSY 0x00010000
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#define MACH_IS_APRICOT 0
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#else
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#define WSWAPrfd(x) ((struct i596_rfd *)(x))
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#define WSWAPrbd(x) ((struct i596_rbd *)(x))
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#define WSWAPiscp(x) ((struct i596_iscp *)(x))
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#define WSWAPscb(x) ((struct i596_scb *)(x))
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#define WSWAPcmd(x) ((struct i596_cmd *)(x))
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#define WSWAPtbd(x) ((struct i596_tbd *)(x))
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#define WSWAPchar(x) ((char *)(x))
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#define ISCP_BUSY 0x0001
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#define MACH_IS_APRICOT 1
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#endif
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/*
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* The MPU_PORT command allows direct access to the 82596. With PORT access
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* the following commands are available (p5-18). The 32-bit port command
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* must be word-swapped with the most significant word written first.
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* This only applies to VME boards.
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*/
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#define PORT_RESET 0x00 /* reset 82596 */
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#define PORT_SELFTEST 0x01 /* selftest */
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#define PORT_ALTSCP 0x02 /* alternate SCB address */
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#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
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static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
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MODULE_AUTHOR("Richard Hirst");
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MODULE_DESCRIPTION("i82596 driver");
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MODULE_LICENSE("GPL");
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MODULE_PARM(i596_debug, "i");
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MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask");
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/* Copy frames shorter than rx_copybreak, otherwise pass on up in
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* a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
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*/
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static int rx_copybreak = 100;
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#define MAX_DRIVERS 4 /* max count of drivers */
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#define PKT_BUF_SZ 1536
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#define MAX_MC_CNT 64
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#define I596_NULL ((u32)0xffffffff)
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#define CMD_EOL 0x8000 /* The last command of the list, stop. */
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#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
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#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
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#define CMD_FLEX 0x0008 /* Enable flexible memory model */
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enum commands {
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CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
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CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
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};
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#define STAT_C 0x8000 /* Set to 0 after execution */
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#define STAT_B 0x4000 /* Command being executed */
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#define STAT_OK 0x2000 /* Command executed ok */
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#define STAT_A 0x1000 /* Command aborted */
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#define CUC_START 0x0100
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#define CUC_RESUME 0x0200
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#define CUC_SUSPEND 0x0300
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#define CUC_ABORT 0x0400
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#define RX_START 0x0010
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#define RX_RESUME 0x0020
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#define RX_SUSPEND 0x0030
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#define RX_ABORT 0x0040
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#define TX_TIMEOUT 5
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#define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */
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struct i596_reg {
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unsigned short porthi;
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unsigned short portlo;
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u32 ca;
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};
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#define EOF 0x8000
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#define SIZE_MASK 0x3fff
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struct i596_tbd {
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unsigned short size;
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unsigned short pad;
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dma_addr_t next;
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dma_addr_t data;
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u32 cache_pad[5]; /* Total 32 bytes... */
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};
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/* The command structure has two 'next' pointers; v_next is the address of
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* the next command as seen by the CPU, b_next is the address of the next
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* command as seen by the 82596. The b_next pointer, as used by the 82596
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* always references the status field of the next command, rather than the
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* v_next field, because the 82596 is unaware of v_next. It may seem more
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* logical to put v_next at the end of the structure, but we cannot do that
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* because the 82596 expects other fields to be there, depending on command
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* type.
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*/
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struct i596_cmd {
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struct i596_cmd *v_next; /* Address from CPUs viewpoint */
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unsigned short status;
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unsigned short command;
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dma_addr_t b_next; /* Address from i596 viewpoint */
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};
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struct tx_cmd {
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struct i596_cmd cmd;
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dma_addr_t tbd;
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unsigned short size;
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unsigned short pad;
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struct sk_buff *skb; /* So we can free it after tx */
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dma_addr_t dma_addr;
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#ifdef __LP64__
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u32 cache_pad[6]; /* Total 64 bytes... */
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#else
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u32 cache_pad[1]; /* Total 32 bytes... */
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#endif
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};
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struct tdr_cmd {
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struct i596_cmd cmd;
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unsigned short status;
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unsigned short pad;
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};
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struct mc_cmd {
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struct i596_cmd cmd;
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short mc_cnt;
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char mc_addrs[MAX_MC_CNT*6];
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};
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struct sa_cmd {
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struct i596_cmd cmd;
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char eth_addr[8];
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};
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struct cf_cmd {
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struct i596_cmd cmd;
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char i596_config[16];
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};
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struct i596_rfd {
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unsigned short stat;
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unsigned short cmd;
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dma_addr_t b_next; /* Address from i596 viewpoint */
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dma_addr_t rbd;
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unsigned short count;
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unsigned short size;
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struct i596_rfd *v_next; /* Address from CPUs viewpoint */
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struct i596_rfd *v_prev;
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#ifndef __LP64__
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u32 cache_pad[2]; /* Total 32 bytes... */
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#endif
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};
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struct i596_rbd {
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/* hardware data */
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unsigned short count;
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unsigned short zero1;
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dma_addr_t b_next;
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dma_addr_t b_data; /* Address from i596 viewpoint */
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unsigned short size;
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unsigned short zero2;
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/* driver data */
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struct sk_buff *skb;
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struct i596_rbd *v_next;
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dma_addr_t b_addr; /* This rbd addr from i596 view */
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unsigned char *v_data; /* Address from CPUs viewpoint */
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/* Total 32 bytes... */
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#ifdef __LP64__
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u32 cache_pad[4];
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#endif
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};
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/* These values as chosen so struct i596_private fits in one page... */
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#define TX_RING_SIZE 32
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#define RX_RING_SIZE 16
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struct i596_scb {
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unsigned short status;
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unsigned short command;
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dma_addr_t cmd;
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dma_addr_t rfd;
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u32 crc_err;
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u32 align_err;
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u32 resource_err;
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u32 over_err;
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u32 rcvdt_err;
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u32 short_err;
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unsigned short t_on;
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unsigned short t_off;
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};
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struct i596_iscp {
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u32 stat;
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dma_addr_t scb;
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};
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struct i596_scp {
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u32 sysbus;
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u32 pad;
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dma_addr_t iscp;
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};
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struct i596_private {
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volatile struct i596_scp scp __attribute__((aligned(32)));
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volatile struct i596_iscp iscp __attribute__((aligned(32)));
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volatile struct i596_scb scb __attribute__((aligned(32)));
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struct sa_cmd sa_cmd __attribute__((aligned(32)));
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struct cf_cmd cf_cmd __attribute__((aligned(32)));
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struct tdr_cmd tdr_cmd __attribute__((aligned(32)));
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struct mc_cmd mc_cmd __attribute__((aligned(32)));
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struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32)));
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struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32)));
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struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32)));
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struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32)));
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u32 stat;
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int last_restart;
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struct i596_rfd *rfd_head;
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struct i596_rbd *rbd_head;
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struct i596_cmd *cmd_tail;
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struct i596_cmd *cmd_head;
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int cmd_backlog;
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u32 last_cmd;
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struct net_device_stats stats;
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int next_tx_cmd;
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int options;
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spinlock_t lock;
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dma_addr_t dma_addr;
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struct device *dev;
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};
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static char init_setup[] =
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{
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0x8E, /* length, prefetch on */
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0xC8, /* fifo to 8, monitor off */
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0x80, /* don't save bad frames */
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0x2E, /* No source address insertion, 8 byte preamble */
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0x00, /* priority and backoff defaults */
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0x60, /* interframe spacing */
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0x00, /* slot time LSB */
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0xf2, /* slot time and retries */
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0x00, /* promiscuous mode */
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0x00, /* collision detect */
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0x40, /* minimum frame length */
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0xff,
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0x00,
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0x7f /* *multi IA */ };
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static int i596_open(struct net_device *dev);
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static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
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static int i596_close(struct net_device *dev);
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static struct net_device_stats *i596_get_stats(struct net_device *dev);
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static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
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static void i596_tx_timeout (struct net_device *dev);
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static void print_eth(unsigned char *buf, char *str);
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static void set_multicast_list(struct net_device *dev);
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static int rx_ring_size = RX_RING_SIZE;
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static int ticks_limit = 100;
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static int max_cmd_backlog = TX_RING_SIZE-1;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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static void i596_poll_controller(struct net_device *dev);
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#endif
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static inline void CA(struct net_device *dev)
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{
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gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION);
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}
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static inline void MPU_PORT(struct net_device *dev, int c, dma_addr_t x)
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{
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struct i596_private *lp = dev->priv;
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u32 v = (u32) (c) | (u32) (x);
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u16 a, b;
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if (lp->options & OPT_SWAP_PORT) {
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a = v >> 16;
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b = v & 0xffff;
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} else {
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a = v & 0xffff;
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b = v >> 16;
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}
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gsc_writel(a, dev->base_addr + PA_CPU_PORT_L_ACCESS);
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udelay(1);
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gsc_writel(b, dev->base_addr + PA_CPU_PORT_L_ACCESS);
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}
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static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
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{
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CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp));
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while (--delcnt && lp->iscp.stat) {
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udelay(10);
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CHECK_INV(&(lp->iscp), sizeof(struct i596_iscp));
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}
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if (!delcnt) {
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printk("%s: %s, iscp.stat %04x, didn't clear\n",
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dev->name, str, lp->iscp.stat);
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return -1;
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}
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else
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return 0;
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}
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static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
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{
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CHECK_INV(&(lp->scb), sizeof(struct i596_scb));
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while (--delcnt && lp->scb.command) {
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udelay(10);
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CHECK_INV(&(lp->scb), sizeof(struct i596_scb));
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}
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if (!delcnt) {
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printk("%s: %s, status %4.4x, cmd %4.4x.\n",
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dev->name, str, lp->scb.status, lp->scb.command);
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return -1;
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}
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else
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return 0;
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}
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|
|
|
static void i596_display_data(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
struct i596_cmd *cmd;
|
|
struct i596_rfd *rfd;
|
|
struct i596_rbd *rbd;
|
|
|
|
printk("lp and scp at %p, .sysbus = %08x, .iscp = %08x\n",
|
|
&lp->scp, lp->scp.sysbus, lp->scp.iscp);
|
|
printk("iscp at %p, iscp.stat = %08x, .scb = %08x\n",
|
|
&lp->iscp, lp->iscp.stat, lp->iscp.scb);
|
|
printk("scb at %p, scb.status = %04x, .command = %04x,"
|
|
" .cmd = %08x, .rfd = %08x\n",
|
|
&lp->scb, lp->scb.status, lp->scb.command,
|
|
lp->scb.cmd, lp->scb.rfd);
|
|
printk(" errors: crc %x, align %x, resource %x,"
|
|
" over %x, rcvdt %x, short %x\n",
|
|
lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
|
|
lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
|
|
cmd = lp->cmd_head;
|
|
while (cmd != NULL) {
|
|
printk("cmd at %p, .status = %04x, .command = %04x, .b_next = %08x\n",
|
|
cmd, cmd->status, cmd->command, cmd->b_next);
|
|
cmd = cmd->v_next;
|
|
}
|
|
rfd = lp->rfd_head;
|
|
printk("rfd_head = %p\n", rfd);
|
|
do {
|
|
printk(" %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x,"
|
|
" count %04x\n",
|
|
rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
|
|
rfd->count);
|
|
rfd = rfd->v_next;
|
|
} while (rfd != lp->rfd_head);
|
|
rbd = lp->rbd_head;
|
|
printk("rbd_head = %p\n", rbd);
|
|
do {
|
|
printk(" %p .count %04x, b_next %08x, b_data %08x, size %04x\n",
|
|
rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
|
|
rbd = rbd->v_next;
|
|
} while (rbd != lp->rbd_head);
|
|
CHECK_INV(lp, sizeof(struct i596_private));
|
|
}
|
|
|
|
|
|
#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
|
|
static void i596_error(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
|
|
|
|
pcc2[0x28] = 1;
|
|
pcc2[0x2b] = 0x1d;
|
|
printk("%s: Error interrupt\n", dev->name);
|
|
i596_display_data(dev);
|
|
}
|
|
#endif
|
|
|
|
#define virt_to_dma(lp,v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)(lp)))
|
|
|
|
static inline void init_rx_bufs(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
int i;
|
|
struct i596_rfd *rfd;
|
|
struct i596_rbd *rbd;
|
|
|
|
/* First build the Receive Buffer Descriptor List */
|
|
|
|
for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
|
|
dma_addr_t dma_addr;
|
|
struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ + 4);
|
|
|
|
if (skb == NULL)
|
|
panic("%s: alloc_skb() failed", __FILE__);
|
|
skb_reserve(skb, 2);
|
|
dma_addr = dma_map_single(lp->dev, skb->data,PKT_BUF_SZ,
|
|
DMA_FROM_DEVICE);
|
|
skb->dev = dev;
|
|
rbd->v_next = rbd+1;
|
|
rbd->b_next = WSWAPrbd(virt_to_dma(lp,rbd+1));
|
|
rbd->b_addr = WSWAPrbd(virt_to_dma(lp,rbd));
|
|
rbd->skb = skb;
|
|
rbd->v_data = skb->data;
|
|
rbd->b_data = WSWAPchar(dma_addr);
|
|
rbd->size = PKT_BUF_SZ;
|
|
}
|
|
lp->rbd_head = lp->rbds;
|
|
rbd = lp->rbds + rx_ring_size - 1;
|
|
rbd->v_next = lp->rbds;
|
|
rbd->b_next = WSWAPrbd(virt_to_dma(lp,lp->rbds));
|
|
|
|
/* Now build the Receive Frame Descriptor List */
|
|
|
|
for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
|
|
rfd->rbd = I596_NULL;
|
|
rfd->v_next = rfd+1;
|
|
rfd->v_prev = rfd-1;
|
|
rfd->b_next = WSWAPrfd(virt_to_dma(lp,rfd+1));
|
|
rfd->cmd = CMD_FLEX;
|
|
}
|
|
lp->rfd_head = lp->rfds;
|
|
lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
|
|
rfd = lp->rfds;
|
|
rfd->rbd = WSWAPrbd(virt_to_dma(lp,lp->rbd_head));
|
|
rfd->v_prev = lp->rfds + rx_ring_size - 1;
|
|
rfd = lp->rfds + rx_ring_size - 1;
|
|
rfd->v_next = lp->rfds;
|
|
rfd->b_next = WSWAPrfd(virt_to_dma(lp,lp->rfds));
|
|
rfd->cmd = CMD_EOL|CMD_FLEX;
|
|
|
|
CHECK_WBACK_INV(lp, sizeof(struct i596_private));
|
|
}
|
|
|
|
static inline void remove_rx_bufs(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
struct i596_rbd *rbd;
|
|
int i;
|
|
|
|
for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
|
|
if (rbd->skb == NULL)
|
|
break;
|
|
dma_unmap_single(lp->dev,
|
|
(dma_addr_t)WSWAPchar(rbd->b_data),
|
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
|
dev_kfree_skb(rbd->skb);
|
|
}
|
|
}
|
|
|
|
|
|
static void rebuild_rx_bufs(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
int i;
|
|
|
|
/* Ensure rx frame/buffer descriptors are tidy */
|
|
|
|
for (i = 0; i < rx_ring_size; i++) {
|
|
lp->rfds[i].rbd = I596_NULL;
|
|
lp->rfds[i].cmd = CMD_FLEX;
|
|
}
|
|
lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
|
|
lp->rfd_head = lp->rfds;
|
|
lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
|
|
lp->rbd_head = lp->rbds;
|
|
lp->rfds[0].rbd = WSWAPrbd(virt_to_dma(lp,lp->rbds));
|
|
|
|
CHECK_WBACK_INV(lp, sizeof(struct i596_private));
|
|
}
|
|
|
|
|
|
static int init_i596_mem(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
unsigned long flags;
|
|
|
|
disable_irq(dev->irq); /* disable IRQs from LAN */
|
|
DEB(DEB_INIT,
|
|
printk("RESET 82596 port: %lx (with IRQ %d disabled)\n",
|
|
(dev->base_addr + PA_I82596_RESET),
|
|
dev->irq));
|
|
|
|
gsc_writel(0, (dev->base_addr + PA_I82596_RESET)); /* Hard Reset */
|
|
udelay(100); /* Wait 100us - seems to help */
|
|
|
|
/* change the scp address */
|
|
|
|
lp->last_cmd = jiffies;
|
|
|
|
|
|
lp->scp.sysbus = 0x0000006c;
|
|
lp->scp.iscp = WSWAPiscp(virt_to_dma(lp,&(lp->iscp)));
|
|
lp->iscp.scb = WSWAPscb(virt_to_dma(lp,&(lp->scb)));
|
|
lp->iscp.stat = ISCP_BUSY;
|
|
lp->cmd_backlog = 0;
|
|
|
|
lp->cmd_head = NULL;
|
|
lp->scb.cmd = I596_NULL;
|
|
|
|
DEB(DEB_INIT, printk("%s: starting i82596.\n", dev->name));
|
|
|
|
CHECK_WBACK(&(lp->scp), sizeof(struct i596_scp));
|
|
CHECK_WBACK(&(lp->iscp), sizeof(struct i596_iscp));
|
|
|
|
MPU_PORT(dev, PORT_ALTSCP, virt_to_dma(lp,&lp->scp));
|
|
|
|
CA(dev);
|
|
|
|
if (wait_istat(dev, lp, 1000, "initialization timed out"))
|
|
goto failed;
|
|
DEB(DEB_INIT, printk("%s: i82596 initialization successful\n", dev->name));
|
|
|
|
/* Ensure rx frame/buffer descriptors are tidy */
|
|
rebuild_rx_bufs(dev);
|
|
|
|
lp->scb.command = 0;
|
|
CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
|
|
|
|
enable_irq(dev->irq); /* enable IRQs from LAN */
|
|
|
|
DEB(DEB_INIT, printk("%s: queuing CmdConfigure\n", dev->name));
|
|
memcpy(lp->cf_cmd.i596_config, init_setup, 14);
|
|
lp->cf_cmd.cmd.command = CmdConfigure;
|
|
CHECK_WBACK(&(lp->cf_cmd), sizeof(struct cf_cmd));
|
|
i596_add_cmd(dev, &lp->cf_cmd.cmd);
|
|
|
|
DEB(DEB_INIT, printk("%s: queuing CmdSASetup\n", dev->name));
|
|
memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
|
|
lp->sa_cmd.cmd.command = CmdSASetup;
|
|
CHECK_WBACK(&(lp->sa_cmd), sizeof(struct sa_cmd));
|
|
i596_add_cmd(dev, &lp->sa_cmd.cmd);
|
|
|
|
DEB(DEB_INIT, printk("%s: queuing CmdTDR\n", dev->name));
|
|
lp->tdr_cmd.cmd.command = CmdTDR;
|
|
CHECK_WBACK(&(lp->tdr_cmd), sizeof(struct tdr_cmd));
|
|
i596_add_cmd(dev, &lp->tdr_cmd.cmd);
|
|
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
|
|
if (wait_cmd(dev, lp, 1000, "timed out waiting to issue RX_START")) {
|
|
spin_unlock_irqrestore (&lp->lock, flags);
|
|
goto failed;
|
|
}
|
|
DEB(DEB_INIT, printk("%s: Issuing RX_START\n", dev->name));
|
|
lp->scb.command = RX_START;
|
|
lp->scb.rfd = WSWAPrfd(virt_to_dma(lp,lp->rfds));
|
|
CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
|
|
|
|
CA(dev);
|
|
|
|
spin_unlock_irqrestore (&lp->lock, flags);
|
|
|
|
if (wait_cmd(dev, lp, 1000, "RX_START not processed"))
|
|
goto failed;
|
|
DEB(DEB_INIT, printk("%s: Receive unit started OK\n", dev->name));
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
printk("%s: Failed to initialise 82596\n", dev->name);
|
|
MPU_PORT(dev, PORT_RESET, 0);
|
|
return -1;
|
|
}
|
|
|
|
|
|
static inline int i596_rx(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
struct i596_rfd *rfd;
|
|
struct i596_rbd *rbd;
|
|
int frames = 0;
|
|
|
|
DEB(DEB_RXFRAME, printk("i596_rx(), rfd_head %p, rbd_head %p\n",
|
|
lp->rfd_head, lp->rbd_head));
|
|
|
|
|
|
rfd = lp->rfd_head; /* Ref next frame to check */
|
|
|
|
CHECK_INV(rfd, sizeof(struct i596_rfd));
|
|
while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
|
|
if (rfd->rbd == I596_NULL)
|
|
rbd = NULL;
|
|
else if (rfd->rbd == lp->rbd_head->b_addr) {
|
|
rbd = lp->rbd_head;
|
|
CHECK_INV(rbd, sizeof(struct i596_rbd));
|
|
}
|
|
else {
|
|
printk("%s: rbd chain broken!\n", dev->name);
|
|
/* XXX Now what? */
|
|
rbd = NULL;
|
|
}
|
|
DEB(DEB_RXFRAME, printk(" rfd %p, rfd.rbd %08x, rfd.stat %04x\n",
|
|
rfd, rfd->rbd, rfd->stat));
|
|
|
|
if (rbd != NULL && ((rfd->stat) & STAT_OK)) {
|
|
/* a good frame */
|
|
int pkt_len = rbd->count & 0x3fff;
|
|
struct sk_buff *skb = rbd->skb;
|
|
int rx_in_place = 0;
|
|
|
|
DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
|
|
frames++;
|
|
|
|
/* Check if the packet is long enough to just accept
|
|
* without copying to a properly sized skbuff.
|
|
*/
|
|
|
|
if (pkt_len > rx_copybreak) {
|
|
struct sk_buff *newskb;
|
|
dma_addr_t dma_addr;
|
|
|
|
dma_unmap_single(lp->dev,(dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
|
|
/* Get fresh skbuff to replace filled one. */
|
|
newskb = dev_alloc_skb(PKT_BUF_SZ + 4);
|
|
if (newskb == NULL) {
|
|
skb = NULL; /* drop pkt */
|
|
goto memory_squeeze;
|
|
}
|
|
skb_reserve(newskb, 2);
|
|
|
|
/* Pass up the skb already on the Rx ring. */
|
|
skb_put(skb, pkt_len);
|
|
rx_in_place = 1;
|
|
rbd->skb = newskb;
|
|
newskb->dev = dev;
|
|
dma_addr = dma_map_single(lp->dev, newskb->data, PKT_BUF_SZ, DMA_FROM_DEVICE);
|
|
rbd->v_data = newskb->data;
|
|
rbd->b_data = WSWAPchar(dma_addr);
|
|
CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd));
|
|
}
|
|
else
|
|
skb = dev_alloc_skb(pkt_len + 2);
|
|
memory_squeeze:
|
|
if (skb == NULL) {
|
|
/* XXX tulip.c can defer packets here!! */
|
|
printk("%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
|
|
lp->stats.rx_dropped++;
|
|
}
|
|
else {
|
|
skb->dev = dev;
|
|
if (!rx_in_place) {
|
|
/* 16 byte align the data fields */
|
|
dma_sync_single_for_cpu(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
|
|
skb_reserve(skb, 2);
|
|
memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
|
|
dma_sync_single_for_device(lp->dev, (dma_addr_t)WSWAPchar(rbd->b_data), PKT_BUF_SZ, DMA_FROM_DEVICE);
|
|
}
|
|
skb->len = pkt_len;
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
netif_rx(skb);
|
|
dev->last_rx = jiffies;
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes+=pkt_len;
|
|
}
|
|
}
|
|
else {
|
|
DEB(DEB_ERRORS, printk("%s: Error, rfd.stat = 0x%04x\n",
|
|
dev->name, rfd->stat));
|
|
lp->stats.rx_errors++;
|
|
if ((rfd->stat) & 0x0001)
|
|
lp->stats.collisions++;
|
|
if ((rfd->stat) & 0x0080)
|
|
lp->stats.rx_length_errors++;
|
|
if ((rfd->stat) & 0x0100)
|
|
lp->stats.rx_over_errors++;
|
|
if ((rfd->stat) & 0x0200)
|
|
lp->stats.rx_fifo_errors++;
|
|
if ((rfd->stat) & 0x0400)
|
|
lp->stats.rx_frame_errors++;
|
|
if ((rfd->stat) & 0x0800)
|
|
lp->stats.rx_crc_errors++;
|
|
if ((rfd->stat) & 0x1000)
|
|
lp->stats.rx_length_errors++;
|
|
}
|
|
|
|
/* Clear the buffer descriptor count and EOF + F flags */
|
|
|
|
if (rbd != NULL && (rbd->count & 0x4000)) {
|
|
rbd->count = 0;
|
|
lp->rbd_head = rbd->v_next;
|
|
CHECK_WBACK_INV(rbd, sizeof(struct i596_rbd));
|
|
}
|
|
|
|
/* Tidy the frame descriptor, marking it as end of list */
|
|
|
|
rfd->rbd = I596_NULL;
|
|
rfd->stat = 0;
|
|
rfd->cmd = CMD_EOL|CMD_FLEX;
|
|
rfd->count = 0;
|
|
|
|
/* Remove end-of-list from old end descriptor */
|
|
|
|
rfd->v_prev->cmd = CMD_FLEX;
|
|
|
|
/* Update record of next frame descriptor to process */
|
|
|
|
lp->scb.rfd = rfd->b_next;
|
|
lp->rfd_head = rfd->v_next;
|
|
CHECK_WBACK_INV(rfd->v_prev, sizeof(struct i596_rfd));
|
|
CHECK_WBACK_INV(rfd, sizeof(struct i596_rfd));
|
|
rfd = lp->rfd_head;
|
|
CHECK_INV(rfd, sizeof(struct i596_rfd));
|
|
}
|
|
|
|
DEB(DEB_RXFRAME, printk("frames %d\n", frames));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
|
|
{
|
|
struct i596_cmd *ptr;
|
|
|
|
while (lp->cmd_head != NULL) {
|
|
ptr = lp->cmd_head;
|
|
lp->cmd_head = ptr->v_next;
|
|
lp->cmd_backlog--;
|
|
|
|
switch ((ptr->command) & 0x7) {
|
|
case CmdTx:
|
|
{
|
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
|
|
struct sk_buff *skb = tx_cmd->skb;
|
|
dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
lp->stats.tx_errors++;
|
|
lp->stats.tx_aborted_errors++;
|
|
|
|
ptr->v_next = NULL;
|
|
ptr->b_next = I596_NULL;
|
|
tx_cmd->cmd.command = 0; /* Mark as free */
|
|
break;
|
|
}
|
|
default:
|
|
ptr->v_next = NULL;
|
|
ptr->b_next = I596_NULL;
|
|
}
|
|
CHECK_WBACK_INV(ptr, sizeof(struct i596_cmd));
|
|
}
|
|
|
|
wait_cmd(dev, lp, 100, "i596_cleanup_cmd timed out");
|
|
lp->scb.cmd = I596_NULL;
|
|
CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
|
|
}
|
|
|
|
|
|
static inline void i596_reset(struct net_device *dev, struct i596_private *lp)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DEB(DEB_RESET, printk("i596_reset\n"));
|
|
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
|
|
wait_cmd(dev, lp, 100, "i596_reset timed out");
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* FIXME: this command might cause an lpmc */
|
|
lp->scb.command = CUC_ABORT | RX_ABORT;
|
|
CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
|
|
CA(dev);
|
|
|
|
/* wait for shutdown */
|
|
wait_cmd(dev, lp, 1000, "i596_reset 2 timed out");
|
|
spin_unlock_irqrestore (&lp->lock, flags);
|
|
|
|
i596_cleanup_cmd(dev,lp);
|
|
i596_rx(dev);
|
|
|
|
netif_start_queue(dev);
|
|
init_i596_mem(dev);
|
|
}
|
|
|
|
|
|
static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
unsigned long flags;
|
|
|
|
DEB(DEB_ADDCMD, printk("i596_add_cmd cmd_head %p\n", lp->cmd_head));
|
|
|
|
cmd->status = 0;
|
|
cmd->command |= (CMD_EOL | CMD_INTR);
|
|
cmd->v_next = NULL;
|
|
cmd->b_next = I596_NULL;
|
|
CHECK_WBACK(cmd, sizeof(struct i596_cmd));
|
|
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
|
|
if (lp->cmd_head != NULL) {
|
|
lp->cmd_tail->v_next = cmd;
|
|
lp->cmd_tail->b_next = WSWAPcmd(virt_to_dma(lp,&cmd->status));
|
|
CHECK_WBACK(lp->cmd_tail, sizeof(struct i596_cmd));
|
|
} else {
|
|
lp->cmd_head = cmd;
|
|
wait_cmd(dev, lp, 100, "i596_add_cmd timed out");
|
|
lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&cmd->status));
|
|
lp->scb.command = CUC_START;
|
|
CHECK_WBACK(&(lp->scb), sizeof(struct i596_scb));
|
|
CA(dev);
|
|
}
|
|
lp->cmd_tail = cmd;
|
|
lp->cmd_backlog++;
|
|
|
|
spin_unlock_irqrestore (&lp->lock, flags);
|
|
|
|
if (lp->cmd_backlog > max_cmd_backlog) {
|
|
unsigned long tickssofar = jiffies - lp->last_cmd;
|
|
|
|
if (tickssofar < ticks_limit)
|
|
return;
|
|
|
|
printk("%s: command unit timed out, status resetting.\n", dev->name);
|
|
#if 1
|
|
i596_reset(dev, lp);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/* this function makes a perfectly adequate probe... but we have a
|
|
device list */
|
|
static int i596_test(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
volatile int *tint;
|
|
u32 data;
|
|
|
|
tint = (volatile int *)(&(lp->scp));
|
|
data = virt_to_dma(lp,tint);
|
|
|
|
tint[1] = -1;
|
|
CHECK_WBACK(tint,PAGE_SIZE);
|
|
|
|
MPU_PORT(dev, 1, data);
|
|
|
|
for(data = 1000000; data; data--) {
|
|
CHECK_INV(tint,PAGE_SIZE);
|
|
if(tint[1] != -1)
|
|
break;
|
|
|
|
}
|
|
|
|
printk("i596_test result %d\n", tint[1]);
|
|
|
|
}
|
|
#endif
|
|
|
|
|
|
static int i596_open(struct net_device *dev)
|
|
{
|
|
DEB(DEB_OPEN, printk("%s: i596_open() irq %d.\n", dev->name, dev->irq));
|
|
|
|
if (request_irq(dev->irq, &i596_interrupt, 0, "i82596", dev)) {
|
|
printk("%s: IRQ %d not free\n", dev->name, dev->irq);
|
|
goto out;
|
|
}
|
|
|
|
init_rx_bufs(dev);
|
|
|
|
if (init_i596_mem(dev)) {
|
|
printk("%s: Failed to init memory\n", dev->name);
|
|
goto out_remove_rx_bufs;
|
|
}
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
|
|
out_remove_rx_bufs:
|
|
remove_rx_bufs(dev);
|
|
free_irq(dev->irq, dev);
|
|
out:
|
|
return -EAGAIN;
|
|
}
|
|
|
|
static void i596_tx_timeout (struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
|
|
/* Transmitter timeout, serious problems. */
|
|
DEB(DEB_ERRORS, printk("%s: transmit timed out, status resetting.\n",
|
|
dev->name));
|
|
|
|
lp->stats.tx_errors++;
|
|
|
|
/* Try to restart the adaptor */
|
|
if (lp->last_restart == lp->stats.tx_packets) {
|
|
DEB(DEB_ERRORS, printk("Resetting board.\n"));
|
|
/* Shutdown and restart */
|
|
i596_reset (dev, lp);
|
|
} else {
|
|
/* Issue a channel attention signal */
|
|
DEB(DEB_ERRORS, printk("Kicking board.\n"));
|
|
lp->scb.command = CUC_START | RX_START;
|
|
CHECK_WBACK_INV(&(lp->scb), sizeof(struct i596_scb));
|
|
CA (dev);
|
|
lp->last_restart = lp->stats.tx_packets;
|
|
}
|
|
|
|
dev->trans_start = jiffies;
|
|
netif_wake_queue (dev);
|
|
}
|
|
|
|
|
|
static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
struct tx_cmd *tx_cmd;
|
|
struct i596_tbd *tbd;
|
|
short length = skb->len;
|
|
dev->trans_start = jiffies;
|
|
|
|
DEB(DEB_STARTTX, printk("%s: i596_start_xmit(%x,%p) called\n", dev->name,
|
|
skb->len, skb->data));
|
|
|
|
if (length < ETH_ZLEN) {
|
|
skb = skb_padto(skb, ETH_ZLEN);
|
|
if (skb == NULL)
|
|
return 0;
|
|
length = ETH_ZLEN;
|
|
}
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
|
|
tbd = lp->tbds + lp->next_tx_cmd;
|
|
|
|
if (tx_cmd->cmd.command) {
|
|
DEB(DEB_ERRORS, printk("%s: xmit ring full, dropping packet.\n",
|
|
dev->name));
|
|
lp->stats.tx_dropped++;
|
|
|
|
dev_kfree_skb(skb);
|
|
} else {
|
|
if (++lp->next_tx_cmd == TX_RING_SIZE)
|
|
lp->next_tx_cmd = 0;
|
|
tx_cmd->tbd = WSWAPtbd(virt_to_dma(lp,tbd));
|
|
tbd->next = I596_NULL;
|
|
|
|
tx_cmd->cmd.command = CMD_FLEX | CmdTx;
|
|
tx_cmd->skb = skb;
|
|
|
|
tx_cmd->pad = 0;
|
|
tx_cmd->size = 0;
|
|
tbd->pad = 0;
|
|
tbd->size = EOF | length;
|
|
|
|
tx_cmd->dma_addr = dma_map_single(lp->dev, skb->data, skb->len,
|
|
DMA_TO_DEVICE);
|
|
tbd->data = WSWAPchar(tx_cmd->dma_addr);
|
|
|
|
DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
|
|
CHECK_WBACK_INV(tx_cmd, sizeof(struct tx_cmd));
|
|
CHECK_WBACK_INV(tbd, sizeof(struct i596_tbd));
|
|
i596_add_cmd(dev, &tx_cmd->cmd);
|
|
|
|
lp->stats.tx_packets++;
|
|
lp->stats.tx_bytes += length;
|
|
}
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_eth(unsigned char *add, char *str)
|
|
{
|
|
int i;
|
|
|
|
printk("i596 0x%p, ", add);
|
|
for (i = 0; i < 6; i++)
|
|
printk(" %02X", add[i + 6]);
|
|
printk(" -->");
|
|
for (i = 0; i < 6; i++)
|
|
printk(" %02X", add[i]);
|
|
printk(" %02X%02X, %s\n", add[12], add[13], str);
|
|
}
|
|
|
|
|
|
#define LAN_PROM_ADDR 0xF0810000
|
|
|
|
static int __devinit i82596_probe(struct net_device *dev,
|
|
struct device *gen_dev)
|
|
{
|
|
int i;
|
|
struct i596_private *lp;
|
|
char eth_addr[6];
|
|
dma_addr_t dma_addr;
|
|
|
|
/* This lot is ensure things have been cache line aligned. */
|
|
if (sizeof(struct i596_rfd) != 32) {
|
|
printk("82596: sizeof(struct i596_rfd) = %d\n",
|
|
(int)sizeof(struct i596_rfd));
|
|
return -ENODEV;
|
|
}
|
|
if ((sizeof(struct i596_rbd) % 32) != 0) {
|
|
printk("82596: sizeof(struct i596_rbd) = %d\n",
|
|
(int)sizeof(struct i596_rbd));
|
|
return -ENODEV;
|
|
}
|
|
if ((sizeof(struct tx_cmd) % 32) != 0) {
|
|
printk("82596: sizeof(struct tx_cmd) = %d\n",
|
|
(int)sizeof(struct tx_cmd));
|
|
return -ENODEV;
|
|
}
|
|
if (sizeof(struct i596_tbd) != 32) {
|
|
printk("82596: sizeof(struct i596_tbd) = %d\n",
|
|
(int)sizeof(struct i596_tbd));
|
|
return -ENODEV;
|
|
}
|
|
#ifndef __LP64__
|
|
if (sizeof(struct i596_private) > 4096) {
|
|
printk("82596: sizeof(struct i596_private) = %d\n",
|
|
(int)sizeof(struct i596_private));
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
if (!dev->base_addr || !dev->irq)
|
|
return -ENODEV;
|
|
|
|
if (pdc_lan_station_id(eth_addr, dev->base_addr)) {
|
|
for (i=0; i < 6; i++) {
|
|
eth_addr[i] = gsc_readb(LAN_PROM_ADDR + i);
|
|
}
|
|
printk(KERN_INFO "%s: MAC of HP700 LAN read from EEPROM\n", __FILE__);
|
|
}
|
|
|
|
dev->mem_start = (unsigned long) dma_alloc_noncoherent(gen_dev,
|
|
sizeof(struct i596_private), &dma_addr, GFP_KERNEL);
|
|
if (!dev->mem_start) {
|
|
printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < 6; i++)
|
|
dev->dev_addr[i] = eth_addr[i];
|
|
|
|
/* The 82596-specific entries in the device structure. */
|
|
dev->open = i596_open;
|
|
dev->stop = i596_close;
|
|
dev->hard_start_xmit = i596_start_xmit;
|
|
dev->get_stats = i596_get_stats;
|
|
dev->set_multicast_list = set_multicast_list;
|
|
dev->tx_timeout = i596_tx_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
dev->poll_controller = i596_poll_controller;
|
|
#endif
|
|
|
|
dev->priv = (void *)(dev->mem_start);
|
|
|
|
lp = dev->priv;
|
|
memset(lp, 0, sizeof(struct i596_private));
|
|
|
|
lp->scb.command = 0;
|
|
lp->scb.cmd = I596_NULL;
|
|
lp->scb.rfd = I596_NULL;
|
|
spin_lock_init(&lp->lock);
|
|
lp->dma_addr = dma_addr;
|
|
lp->dev = gen_dev;
|
|
|
|
CHECK_WBACK_INV(dev->mem_start, sizeof(struct i596_private));
|
|
|
|
i = register_netdev(dev);
|
|
if (i) {
|
|
lp = dev->priv;
|
|
dma_free_noncoherent(lp->dev, sizeof(struct i596_private),
|
|
(void *)dev->mem_start, lp->dma_addr);
|
|
return i;
|
|
};
|
|
|
|
DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
|
|
for (i = 0; i < 6; i++)
|
|
DEB(DEB_PROBE, printk(" %2.2X", dev->dev_addr[i]));
|
|
DEB(DEB_PROBE, printk(" IRQ %d.\n", dev->irq));
|
|
DEB(DEB_INIT, printk(KERN_INFO "%s: lp at 0x%p (%d bytes), lp->scb at 0x%p\n",
|
|
dev->name, lp, (int)sizeof(struct i596_private), &lp->scb));
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void i596_poll_controller(struct net_device *dev)
|
|
{
|
|
disable_irq(dev->irq);
|
|
i596_interrupt(dev->irq, dev, NULL);
|
|
enable_irq(dev->irq);
|
|
}
|
|
#endif
|
|
|
|
static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct i596_private *lp;
|
|
unsigned short status, ack_cmd = 0;
|
|
|
|
if (dev == NULL) {
|
|
printk("%s: irq %d for unknown device.\n", __FUNCTION__, irq);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
lp = dev->priv;
|
|
|
|
spin_lock (&lp->lock);
|
|
|
|
wait_cmd(dev, lp, 100, "i596 interrupt, timeout");
|
|
status = lp->scb.status;
|
|
|
|
DEB(DEB_INTS, printk("%s: i596 interrupt, IRQ %d, status %4.4x.\n",
|
|
dev->name, irq, status));
|
|
|
|
ack_cmd = status & 0xf000;
|
|
|
|
if (!ack_cmd) {
|
|
DEB(DEB_ERRORS, printk("%s: interrupt with no events\n", dev->name));
|
|
spin_unlock (&lp->lock);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
if ((status & 0x8000) || (status & 0x2000)) {
|
|
struct i596_cmd *ptr;
|
|
|
|
if ((status & 0x8000))
|
|
DEB(DEB_INTS, printk("%s: i596 interrupt completed command.\n", dev->name));
|
|
if ((status & 0x2000))
|
|
DEB(DEB_INTS, printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
|
|
|
|
while (lp->cmd_head != NULL) {
|
|
CHECK_INV(lp->cmd_head, sizeof(struct i596_cmd));
|
|
if (!(lp->cmd_head->status & STAT_C))
|
|
break;
|
|
|
|
ptr = lp->cmd_head;
|
|
|
|
DEB(DEB_STATUS, printk("cmd_head->status = %04x, ->command = %04x\n",
|
|
lp->cmd_head->status, lp->cmd_head->command));
|
|
lp->cmd_head = ptr->v_next;
|
|
lp->cmd_backlog--;
|
|
|
|
switch ((ptr->command) & 0x7) {
|
|
case CmdTx:
|
|
{
|
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
|
|
struct sk_buff *skb = tx_cmd->skb;
|
|
|
|
if ((ptr->status) & STAT_OK) {
|
|
DEB(DEB_TXADDR, print_eth(skb->data, "tx-done"));
|
|
} else {
|
|
lp->stats.tx_errors++;
|
|
if ((ptr->status) & 0x0020)
|
|
lp->stats.collisions++;
|
|
if (!((ptr->status) & 0x0040))
|
|
lp->stats.tx_heartbeat_errors++;
|
|
if ((ptr->status) & 0x0400)
|
|
lp->stats.tx_carrier_errors++;
|
|
if ((ptr->status) & 0x0800)
|
|
lp->stats.collisions++;
|
|
if ((ptr->status) & 0x1000)
|
|
lp->stats.tx_aborted_errors++;
|
|
}
|
|
dma_unmap_single(lp->dev, tx_cmd->dma_addr, skb->len, DMA_TO_DEVICE);
|
|
dev_kfree_skb_irq(skb);
|
|
|
|
tx_cmd->cmd.command = 0; /* Mark free */
|
|
break;
|
|
}
|
|
case CmdTDR:
|
|
{
|
|
unsigned short status = ((struct tdr_cmd *)ptr)->status;
|
|
|
|
if (status & 0x8000) {
|
|
DEB(DEB_ANY, printk("%s: link ok.\n", dev->name));
|
|
} else {
|
|
if (status & 0x4000)
|
|
printk("%s: Transceiver problem.\n", dev->name);
|
|
if (status & 0x2000)
|
|
printk("%s: Termination problem.\n", dev->name);
|
|
if (status & 0x1000)
|
|
printk("%s: Short circuit.\n", dev->name);
|
|
|
|
DEB(DEB_TDR, printk("%s: Time %d.\n", dev->name, status & 0x07ff));
|
|
}
|
|
break;
|
|
}
|
|
case CmdConfigure:
|
|
/* Zap command so set_multicast_list() knows it is free */
|
|
ptr->command = 0;
|
|
break;
|
|
}
|
|
ptr->v_next = NULL;
|
|
ptr->b_next = I596_NULL;
|
|
CHECK_WBACK(ptr, sizeof(struct i596_cmd));
|
|
lp->last_cmd = jiffies;
|
|
}
|
|
|
|
/* This mess is arranging that only the last of any outstanding
|
|
* commands has the interrupt bit set. Should probably really
|
|
* only add to the cmd queue when the CU is stopped.
|
|
*/
|
|
ptr = lp->cmd_head;
|
|
while ((ptr != NULL) && (ptr != lp->cmd_tail)) {
|
|
struct i596_cmd *prev = ptr;
|
|
|
|
ptr->command &= 0x1fff;
|
|
ptr = ptr->v_next;
|
|
CHECK_WBACK_INV(prev, sizeof(struct i596_cmd));
|
|
}
|
|
|
|
if ((lp->cmd_head != NULL))
|
|
ack_cmd |= CUC_START;
|
|
lp->scb.cmd = WSWAPcmd(virt_to_dma(lp,&lp->cmd_head->status));
|
|
CHECK_WBACK_INV(&lp->scb, sizeof(struct i596_scb));
|
|
}
|
|
if ((status & 0x1000) || (status & 0x4000)) {
|
|
if ((status & 0x4000))
|
|
DEB(DEB_INTS, printk("%s: i596 interrupt received a frame.\n", dev->name));
|
|
i596_rx(dev);
|
|
/* Only RX_START if stopped - RGH 07-07-96 */
|
|
if (status & 0x1000) {
|
|
if (netif_running(dev)) {
|
|
DEB(DEB_ERRORS, printk("%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
|
|
ack_cmd |= RX_START;
|
|
lp->stats.rx_errors++;
|
|
lp->stats.rx_fifo_errors++;
|
|
rebuild_rx_bufs(dev);
|
|
}
|
|
}
|
|
}
|
|
wait_cmd(dev, lp, 100, "i596 interrupt, timeout");
|
|
lp->scb.command = ack_cmd;
|
|
CHECK_WBACK(&lp->scb, sizeof(struct i596_scb));
|
|
|
|
/* DANGER: I suspect that some kind of interrupt
|
|
acknowledgement aside from acking the 82596 might be needed
|
|
here... but it's running acceptably without */
|
|
|
|
CA(dev);
|
|
|
|
wait_cmd(dev, lp, 100, "i596 interrupt, exit timeout");
|
|
DEB(DEB_INTS, printk("%s: exiting interrupt.\n", dev->name));
|
|
|
|
spin_unlock (&lp->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int i596_close(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
unsigned long flags;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
DEB(DEB_INIT, printk("%s: Shutting down ethercard, status was %4.4x.\n",
|
|
dev->name, lp->scb.status));
|
|
|
|
spin_lock_irqsave(&lp->lock, flags);
|
|
|
|
wait_cmd(dev, lp, 100, "close1 timed out");
|
|
lp->scb.command = CUC_ABORT | RX_ABORT;
|
|
CHECK_WBACK(&lp->scb, sizeof(struct i596_scb));
|
|
|
|
CA(dev);
|
|
|
|
wait_cmd(dev, lp, 100, "close2 timed out");
|
|
spin_unlock_irqrestore(&lp->lock, flags);
|
|
DEB(DEB_STRUCT,i596_display_data(dev));
|
|
i596_cleanup_cmd(dev,lp);
|
|
|
|
disable_irq(dev->irq);
|
|
|
|
free_irq(dev->irq, dev);
|
|
remove_rx_bufs(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *
|
|
i596_get_stats(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
|
|
return &lp->stats;
|
|
}
|
|
|
|
/*
|
|
* Set or clear the multicast filter for this adaptor.
|
|
*/
|
|
|
|
static void set_multicast_list(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = dev->priv;
|
|
int config = 0, cnt;
|
|
|
|
DEB(DEB_MULTI, printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
|
|
dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF",
|
|
dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
|
|
|
|
if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
|
|
lp->cf_cmd.i596_config[8] |= 0x01;
|
|
config = 1;
|
|
}
|
|
if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
|
|
lp->cf_cmd.i596_config[8] &= ~0x01;
|
|
config = 1;
|
|
}
|
|
if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
|
|
lp->cf_cmd.i596_config[11] &= ~0x20;
|
|
config = 1;
|
|
}
|
|
if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
|
|
lp->cf_cmd.i596_config[11] |= 0x20;
|
|
config = 1;
|
|
}
|
|
if (config) {
|
|
if (lp->cf_cmd.cmd.command)
|
|
printk("%s: config change request already queued\n",
|
|
dev->name);
|
|
else {
|
|
lp->cf_cmd.cmd.command = CmdConfigure;
|
|
CHECK_WBACK_INV(&lp->cf_cmd, sizeof(struct cf_cmd));
|
|
i596_add_cmd(dev, &lp->cf_cmd.cmd);
|
|
}
|
|
}
|
|
|
|
cnt = dev->mc_count;
|
|
if (cnt > MAX_MC_CNT)
|
|
{
|
|
cnt = MAX_MC_CNT;
|
|
printk("%s: Only %d multicast addresses supported",
|
|
dev->name, cnt);
|
|
}
|
|
|
|
if (dev->mc_count > 0) {
|
|
struct dev_mc_list *dmi;
|
|
unsigned char *cp;
|
|
struct mc_cmd *cmd;
|
|
|
|
cmd = &lp->mc_cmd;
|
|
cmd->cmd.command = CmdMulticastList;
|
|
cmd->mc_cnt = dev->mc_count * 6;
|
|
cp = cmd->mc_addrs;
|
|
for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
|
|
memcpy(cp, dmi->dmi_addr, 6);
|
|
if (i596_debug > 1)
|
|
DEB(DEB_MULTI, printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
|
|
}
|
|
CHECK_WBACK_INV(&lp->mc_cmd, sizeof(struct mc_cmd));
|
|
i596_add_cmd(dev, &cmd->cmd);
|
|
}
|
|
}
|
|
|
|
MODULE_PARM(debug, "i");
|
|
MODULE_PARM_DESC(debug, "lasi_82596 debug mask");
|
|
static int debug = -1;
|
|
|
|
static int num_drivers;
|
|
static struct net_device *netdevs[MAX_DRIVERS];
|
|
|
|
static int __devinit
|
|
lan_init_chip(struct parisc_device *dev)
|
|
{
|
|
struct net_device *netdevice;
|
|
int retval;
|
|
|
|
if (num_drivers >= MAX_DRIVERS) {
|
|
/* max count of possible i82596 drivers reached */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (num_drivers == 0)
|
|
printk(KERN_INFO LASI_82596_DRIVER_VERSION "\n");
|
|
|
|
if (!dev->irq) {
|
|
printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
|
|
__FILE__, dev->hpa.start);
|
|
return -ENODEV;
|
|
}
|
|
|
|
printk(KERN_INFO "Found i82596 at 0x%lx, IRQ %d\n", dev->hpa.start,
|
|
dev->irq);
|
|
|
|
netdevice = alloc_etherdev(0);
|
|
if (!netdevice)
|
|
return -ENOMEM;
|
|
|
|
netdevice->base_addr = dev->hpa.start;
|
|
netdevice->irq = dev->irq;
|
|
|
|
retval = i82596_probe(netdevice, &dev->dev);
|
|
if (retval) {
|
|
free_netdev(netdevice);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (dev->id.sversion == 0x72) {
|
|
((struct i596_private *)netdevice->priv)->options = OPT_SWAP_PORT;
|
|
}
|
|
|
|
netdevs[num_drivers++] = netdevice;
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static struct parisc_device_id lan_tbl[] = {
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008a },
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00072 },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(parisc, lan_tbl);
|
|
|
|
static struct parisc_driver lan_driver = {
|
|
.name = "lasi_82596",
|
|
.id_table = lan_tbl,
|
|
.probe = lan_init_chip,
|
|
};
|
|
|
|
static int __devinit lasi_82596_init(void)
|
|
{
|
|
if (debug >= 0)
|
|
i596_debug = debug;
|
|
return register_parisc_driver(&lan_driver);
|
|
}
|
|
|
|
module_init(lasi_82596_init);
|
|
|
|
static void __exit lasi_82596_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<MAX_DRIVERS; i++) {
|
|
struct i596_private *lp;
|
|
struct net_device *netdevice;
|
|
|
|
netdevice = netdevs[i];
|
|
if (!netdevice)
|
|
continue;
|
|
|
|
unregister_netdev(netdevice);
|
|
|
|
lp = netdevice->priv;
|
|
dma_free_noncoherent(lp->dev, sizeof(struct i596_private),
|
|
(void *)netdevice->mem_start, lp->dma_addr);
|
|
free_netdev(netdevice);
|
|
}
|
|
num_drivers = 0;
|
|
|
|
unregister_parisc_driver(&lan_driver);
|
|
}
|
|
|
|
module_exit(lasi_82596_exit);
|