1950 lines
50 KiB
C
1950 lines
50 KiB
C
/*-
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* TODO:
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* [1] integrate into current if_ed.c
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* [2] parse tuples to find out where to map the shared memory buffer,
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* and what to write into the configuration register
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* [3] move pcic-specific code into a separate module.
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*
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* Device driver for IBM PCMCIA Credit Card Adapter for Ethernet,
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* if_ze.c
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*
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* Based on the Device driver for National Semiconductor DS8390 ethernet
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* adapters by David Greenman. Modifications for PCMCIA by Keith Moore.
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* Adapted for FreeBSD 1.1.5 by Jordan Hubbard.
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*
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* Currently supports only the IBM Credit Card Adapter for Ethernet, but
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* could probably work with other PCMCIA cards also, if it were modified
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* to get the locations of the PCMCIA configuration option register (COR)
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* by parsing the configuration tuples, rather than by hard-coding in
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* the value expected by IBM's card.
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*
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* Sources for data on the PCMCIA/IBM CCAE specific portions of the driver:
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*
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* [1] _Local Area Network Credit Card Adapters Technical Reference_,
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* IBM Corp., SC30-3585-00, part # 33G9243.
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* [2] "pre-alpha" PCMCIA support code for Linux by Barry Jaspan.
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* [3] Intel 82536SL PC Card Interface Controller Data Sheet, Intel
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* Order Number 290423-002
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* [4] National Semiconductor DP83902A ST-NIC (tm) Serial Network
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* Interface Controller for Twisted Pair data sheet.
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*
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*
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* Copyright (C) 1993, David Greenman. This software may be used, modified,
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* copied, distributed, and sold, in both source and binary form provided
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* that the above copyright and these terms are retained. Under no
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* circumstances is the author responsible for the proper functioning
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* of this software, nor does the author assume any responsibility
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* for damages incurred with its use.
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*/
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#include "ze.h"
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#if NZE > 0
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#include "bpfilter.h"
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#include "param.h"
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#include "systm.h"
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#include "errno.h"
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#include "ioctl.h"
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#include "mbuf.h"
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#include "socket.h"
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#include "syslog.h"
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#include "net/if.h"
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#include "net/if_dl.h"
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#include "net/if_types.h"
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#include "net/netisr.h"
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#ifdef INET
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#include "netinet/in.h"
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#include "netinet/in_systm.h"
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#include "netinet/in_var.h"
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#include "netinet/ip.h"
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#include "netinet/if_ether.h"
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#endif
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#ifdef NS
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#include "netns/ns.h"
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#include "netns/ns_if.h"
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#endif
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#if NBPFILTER > 0
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#include "net/bpf.h"
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#include "net/bpfdesc.h"
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#endif
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#include "i386/isa/isa.h"
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#include "i386/isa/isa_device.h"
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#include "i386/isa/icu.h"
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#include "i386/isa/if_zereg.h"
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#include "i386/include/pio.h"
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/*****************************************************************************
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* pcmcia controller chip (PCIC) support *
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* (eventually, move this to a separate file) *
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*****************************************************************************/
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#include "ic/i82365.h"
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/*
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* Each PCIC chip (82365SL or clone) can handle two card slots, and there
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* can be up to four PCICs in a system. (On some machines, not all of the
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* address lines are decoded, so a card may appear to be in more than one
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* slot.)
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*/
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#define MAXSLOT 8
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/*
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* To access a register on the PCIC for a particular slot, you
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* first write the correct OFFSET value for that slot in the
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* INDEX register for the PCIC controller. You then read or write
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* the value from or to the DATA register for that controller.
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*
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* The first pair of chips shares I/O addresss for DATA and INDEX,
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* as does the second pair. (To the programmer, it looks like each
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* pair is a single chip.) The i/o port addresses are hard-wired
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* into the PCIC; so the following addresses should be valid for
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* any machine that uses this chip.
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*/
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#define PCIC_INDEX_0 0x3E0 /* index reg, chips 0 and 1 */
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#define PCIC_DATA_0 0x3E1 /* data register, chips 0 and 1 */
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#define PCIC_INDEX_1 0x3E2 /* index reg, chips 1 and 2 */
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#define PCIC_DATA_1 0x3E3 /* data register, chips 1 and 2 */
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/*
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* Given a slot number, calculate the INDEX and DATA registers
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* to talk to that slot. OFFSET is added to the register number
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* to address the registers for a particular slot.
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*/
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#define INDEX(slot) ((slot) < 4 ? PCIC_INDEX_0 : PCIC_INDEX_1)
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#define DATA(slot) ((slot) < 4 ? PCIC_DATA_0 : PCIC_DATA_1)
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#define OFFSET(slot) ((slot) % 4 * 0x40)
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/*
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* There are 5 sets (windows) of memory mapping registers on the PCIC chip
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* for each slot, numbered 0..4.
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*
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* They start at 10/50 hex within the chip's register space (not system
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* I/O space), and are eight addresses apart. These are actually pairs of
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* 8-bit-wide registers (low byte first, then high byte) since the
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* address fields are actually 12 bits long. The upper bits are used
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* for other things like 8/16-bit select and wait states.
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*
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* Memory mapping registers include start/stop addresses to define the
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* region to be mapped (in terms of system memory addresses), and
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* an offset register to allow for translation from system space
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* to card space. The lower 12 bits aren't included in these, so memory is
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* mapped in 4K chunks.
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*/
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#define MEM_START_ADDR(window) (((window) * 0x08) + 0x10)
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#define MEM_STOP_ADDR(window) (((window) * 0x08) + 0x12)
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#define MEM_OFFSET(window) (((window) * 0x08) + 0x14)
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/*
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* this bit gets set in the address window enable register (PCIC_ADDRWINE)
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* to enable a particular address window.
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*/
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#define MEM_ENABLE_BIT(window) ((1) << (window))
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/*
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* There are two i/o port addressing windows. I/O ports cannot be
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* relocated within system i/o space (unless the card doesn't decode
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* all of the address bits); unlike card memory, there is no address
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* translation offset.
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*/
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#define IO_START_ADDR(window) ((window) ? PCIC_IO1_STL : PCIC_IO0_STL)
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#define IO_STOP_ADDR(window) ((window) ? PCIC_IO1_SPL : PCIC_IO0_SPL)
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#define IO_ENABLE_BIT(window) ((window) ? PCIC_IO1_EN : PCIC_IO0_EN)
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#define IO_CS16_BIT(window) ((window) ? PCIC_IO1_CS16 : PCIC_IO0_CS16)
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/*
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* read a byte from a pcic register for a particular slot
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*/
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static inline unsigned char
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pcic_getb (int slot, int reg)
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{
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outb (INDEX(slot), OFFSET (slot) + reg);
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return inb (DATA (slot));
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}
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/*
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* write a byte to a pcic register for a particular slot
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*/
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static inline void
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pcic_putb (int slot, int reg, unsigned char val)
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{
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outb (INDEX(slot), OFFSET (slot) + reg);
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outb (DATA (slot), val);
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}
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/*
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* read a word from a pcic register for a particular slot
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*/
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static inline unsigned short
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pcic_getw (int slot, int reg)
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{
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return pcic_getb (slot, reg) | (pcic_getb (slot, reg+1) << 8);
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}
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/*
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* write a word to a pcic register at a particular slot
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*/
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static inline void
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pcic_putw (int slot, int reg, unsigned short val)
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{
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pcic_putb (slot, reg, val & 0xff);
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pcic_putb (slot, reg + 1, (val >> 8) & 0xff);
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}
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static void
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pcic_print_regs (int slot)
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{
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int i, j;
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for (i = 0; i < 0x40; i += 16) {
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for (j = 0; j < 16; ++j)
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printf ("%02x ", pcic_getb (slot, i + j));
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printf ("\n");
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}
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}
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/*
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* map a portion of the card's memory space into system memory
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* space.
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*
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* slot = # of the slot the card is plugged into
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* window = which pcic memory map registers to use (0..4)
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* sys_addr = base system PHYSICAL memory address where we want it. must
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* be on an appropriate boundary (lower 12 bits are zero).
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* card_addr = the base address of the card's memory to correspond
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* to sys_addr
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* length = length of the segment to map (may be rounded up as necessary)
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* type = which card memory space to map (attribute or shared)
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* width = 1 for byte-wide mapping; 2 for word (16-bit) mapping.
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*/
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enum memtype { COMMON, ATTRIBUTE };
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static void
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pcic_map_memory (int slot, int window, unsigned long sys_addr,
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unsigned long card_addr, unsigned long length,
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enum memtype type, int width)
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{
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unsigned short offset;
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unsigned short mem_start_addr;
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unsigned short mem_stop_addr;
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sys_addr >>= 12;
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card_addr >>= 12;
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length >>= 12;
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/*
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* compute an offset for the chip such that
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* (sys_addr + offset) = card_addr
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* but the arithmetic is done modulo 2^14
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*/
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offset = (card_addr - sys_addr) & 0x3FFF;
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/*
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* now OR in the bit for "attribute memory" if necessary
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*/
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if (type == ATTRIBUTE) {
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offset |= (PCIC_REG << 8);
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/* REG == "region active" pin on card */
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}
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/*
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* okay, set up the chip memory mapping registers, and turn
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* on the enable bit for this window.
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* if we are doing 16-bit wide accesses (width == 2),
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* turn on the appropriate bit.
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*
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* XXX for now, we set all of the wait state bits to zero.
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* Not really sure how they should be set.
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*/
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mem_start_addr = sys_addr & 0xFFF;
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if (width == 2)
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mem_start_addr |= (PCIC_DATA16 << 8);
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mem_stop_addr = (sys_addr + length) & 0xFFF;
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pcic_putw (slot, MEM_START_ADDR(window), mem_start_addr);
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pcic_putw (slot, MEM_STOP_ADDR(window), mem_stop_addr);
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pcic_putw (slot, MEM_OFFSET(window), offset);
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/*
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* Assert the bit (PCIC_MEMCS16) that says to decode all of
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* the address lines.
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*/
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) |
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MEM_ENABLE_BIT(window) | PCIC_MEMCS16);
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}
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static void
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pcic_unmap_memory (int slot, int window)
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{
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/*
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* seems like we need to turn off the enable bit first, after which
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* we can clear the registers out just to be sure.
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*/
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) & ~MEM_ENABLE_BIT(window));
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pcic_putw (slot, MEM_START_ADDR(window), 0);
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pcic_putw (slot, MEM_STOP_ADDR(window), 0);
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pcic_putw (slot, MEM_OFFSET(window), 0);
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}
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/*
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* map a range of addresses into system i/o space
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* (no translation of i/o addresses is possible)
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*
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* 'width' is:
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* + 0 to tell the PCIC to generate the ISA IOCS16* signal from
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* the PCMCIA IOIS16* signal.
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* + 1 to select 8-bit width
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* + 2 to select 16-bit width
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*/
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static void
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pcic_map_io (int slot, int window, unsigned short base, unsigned short length,
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unsigned short width)
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{
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unsigned char x;
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pcic_putw (slot, IO_START_ADDR(window), base);
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pcic_putw (slot, IO_STOP_ADDR(window), base+length-1);
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/*
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* select the bits that determine whether
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* an i/o operation is 8 or 16 bits wide
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*/
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x = pcic_getb (slot, PCIC_IOCTL);
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switch (width) {
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case 0: /* PCMCIA card decides */
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if (window)
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x = (x & 0xf0) | PCIC_IO1_CS16;
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else
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x = (x & 0x0f) | PCIC_IO0_CS16;
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break;
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case 1: /* 8 bits wide */
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break;
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case 2: /* 16 bits wide */
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if (window)
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x = (x & 0xf0) | PCIC_IO1_16BIT;
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else
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x = (x & 0x0f) | PCIC_IO0_16BIT;
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break;
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}
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pcic_putb (slot, PCIC_IOCTL, x);
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) | IO_ENABLE_BIT(window));
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}
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#ifdef TEST
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static void
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pcic_unmap_io (int slot, int window)
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{
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) & ~IO_ENABLE_BIT(window));
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pcic_putw (slot, IO_START_ADDR(window), 0);
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pcic_putw (slot, IO_STOP_ADDR(window), 0);
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}
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#endif /* TEST */
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/*
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* tell the PCIC which irq we want to use. only the following are legal:
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* 3, 4, 5, 7, 9, 10, 11, 12, 14, 15
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*
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* NB: 'irq' is an interrupt NUMBER, not a MASK as in struct isa_device.
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*/
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static void
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pcic_map_irq (int slot, int irq)
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{
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if (irq < 3 || irq == 6 || irq == 8 || irq == 13 || irq > 15) {
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printf ("ze: pcic_map_irq (slot %d): illegal irq %d\n", slot, irq);
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return;
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}
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) | (irq & 0x0F));
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}
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static void
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pcic_power_on (int slot)
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{
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pcic_putb (slot, PCIC_POWER,
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pcic_getb (slot, PCIC_POWER) | PCIC_DISRST | PCIC_PCPWRE);
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DELAY (50000);
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pcic_putb (slot, PCIC_POWER,
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pcic_getb (slot, PCIC_POWER) | PCIC_OUTENA);
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}
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static void
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pcic_reset (int slot)
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{
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/* assert RESET (by clearing a bit!), wait a bit, and de-assert it */
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) & ~PCIC_CARDRESET);
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DELAY (50000);
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDRESET);
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}
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/*****************************************************************************
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* Driver for Ethernet Adapter *
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*****************************************************************************/
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/*
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* ze_softc: per line info and status
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*/
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struct ze_softc {
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struct arpcom arpcom; /* ethernet common */
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char *type_str; /* pointer to type string */
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char *mau; /* type of media access unit */
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#if 0
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u_char vendor; /* interface vendor */
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u_char type; /* interface type code */
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#endif
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#if 0
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u_short vector; /* interrupt vector */
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#endif
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u_short nic_addr; /* NIC (DS8390) I/O bus address */
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caddr_t smem_start; /* shared memory start address */
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caddr_t smem_end; /* shared memory end address */
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u_long smem_size; /* total shared memory size */
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caddr_t smem_ring; /* start of RX ring-buffer (in smem) */
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caddr_t bpf; /* BPF "magic cookie" */
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u_char memwidth; /* width of access to card mem 8 or 16 */
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u_char xmit_busy; /* transmitter is busy */
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u_char txb_cnt; /* Number of transmit buffers */
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u_char txb_next; /* Pointer to next buffer ready to xmit */
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u_short txb_next_len; /* next xmit buffer length */
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u_char data_buffered; /* data has been buffered in interface memory */
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u_char tx_page_start; /* first page of TX buffer area */
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u_char rec_page_start; /* first page of RX ring-buffer */
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u_char rec_page_stop; /* last page of RX ring-buffer */
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u_char next_packet; /* pointer to next unread RX packet */
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} ze_softc[NZE];
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int ze_attach(), ze_ioctl(), ze_probe();
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void ze_init(), ze_start(), ze_stop(), ze_intr();
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void ze_reset(), ze_watchdog(), ze_get_packet();
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static inline void ze_rint();
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static inline void ze_xmit();
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static inline char *ze_ring_copy();
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struct isa_driver zedriver = {
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ze_probe,
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ze_attach,
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"ze"
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};
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#define ETHER_MIN_LEN 64
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#define ETHER_MAX_LEN 1518
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#define ETHER_ADDR_LEN 6
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#define ETHER_HDR_SIZE 14
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static unsigned char enet_addr[6];
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static unsigned char card_info[256];
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#define CARD_INFO "IBM Corp.~Ethernet~0933495"
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/*
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* scan the card information structure looking for the version/product info
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* tuple. when we find it, compare it to the string we are looking for.
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* return 1 if we find it, 0 otherwise.
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*/
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static int
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ze_check_cis (unsigned char *scratch)
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{
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int i,j,k;
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card_info[0] = '\0';
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i = 0;
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while (scratch[i] != 0xff && i < 1024) {
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unsigned char link = scratch[i+2];
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#if 0
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printf ("[%02x] %02x ", i, link);
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for (j = 4; j < 2 * link + 4 && j < 32; j += 2)
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printf ("%02x ", scratch[j + i]);
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printf ("\n");
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#endif
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if (scratch[i] == 0x15) {
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/*
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* level 1 version/product info
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* copy to card_info, translating '\0' to '~'
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*/
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k = 0;
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for (j = i+8; scratch[j] != 0xff; j += 2)
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card_info[k++] = scratch[j] == '\0' ? '~' : scratch[j];
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card_info[k++] = '\0';
|
||
return (memcmp (card_info, CARD_INFO, sizeof(CARD_INFO)-1) == 0);
|
||
}
|
||
i += 4 + 2 * link;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Probe each slot looking for an IBM Credit Card Adapter for Ethernet
|
||
* For each card that we find, map its card information structure
|
||
* into system memory at 'scratch' and see whether it's one of ours.
|
||
* Return the slot number if we find a card, or -1 otherwise.
|
||
*
|
||
* Side effects:
|
||
* + On success, leaves CIS mapped into memory at 'scratch';
|
||
* caller must free it.
|
||
* + On success, leaves ethernet address in enet_addr.
|
||
* + Leaves product/vendor id of last card probed in 'card_info'
|
||
*/
|
||
|
||
static int
|
||
ze_find_adapter (unsigned char *scratch)
|
||
{
|
||
int slot;
|
||
|
||
for (slot = 0; slot < MAXSLOT; ++slot) {
|
||
/*
|
||
* see if there's a PCMCIA controller here
|
||
* Intel PCMCIA controllers use 0x82 and 0x83
|
||
* IBM clone chips use 0x88 and 0x89, apparently
|
||
*/
|
||
unsigned char idbyte = pcic_getb (slot, PCIC_ID_REV);
|
||
|
||
if (idbyte != 0x82 && idbyte != 0x83 &&
|
||
idbyte != 0x88 && idbyte != 0x89) {
|
||
#if 0
|
||
printf ("ibmccae: pcic slot %d: wierd id/rev code 0x%02x\n",
|
||
slot, idbyte);
|
||
#endif
|
||
continue;
|
||
}
|
||
if ((pcic_getb (slot, PCIC_STATUS) & PCIC_CD) != PCIC_CD) {
|
||
printf ("ze: slot %d: no card in slot\n", slot);
|
||
/* no card in slot */
|
||
continue;
|
||
}
|
||
pcic_power_on (slot);
|
||
pcic_reset (slot);
|
||
/*
|
||
* map the card's attribute memory and examine its
|
||
* card information structure tuples for something
|
||
* we recognize.
|
||
*/
|
||
pcic_map_memory (slot, 0, kvtop (scratch), 0L,
|
||
0xFFFL, ATTRIBUTE, 1);
|
||
|
||
if ((ze_check_cis (scratch)) > 0) {
|
||
/* found it */
|
||
printf ("ze: found card in slot %d\n", slot);
|
||
return slot;
|
||
}
|
||
else
|
||
printf ("ze: pcmcia slot %d: %s\n", slot, card_info);
|
||
pcic_unmap_memory (slot, 0);
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
|
||
/*
|
||
* macros to handle casting unsigned long to (char *) so we can
|
||
* read/write into physical memory space.
|
||
*/
|
||
|
||
#define PEEK(addr) (*((unsigned char *)(addr)))
|
||
#define POKE(addr,val) do { PEEK(addr) = (val); } while (0)
|
||
|
||
/*
|
||
* Determine if the device is present
|
||
*
|
||
* on entry:
|
||
* a pointer to an isa_device struct
|
||
* on exit:
|
||
* NULL if device not found
|
||
* or # of i/o addresses used (if found)
|
||
*/
|
||
int
|
||
ze_probe(isa_dev)
|
||
struct isa_device *isa_dev;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[isa_dev->id_unit];
|
||
int i, x;
|
||
u_int memsize;
|
||
u_char iptr, memwidth, sum, tmp;
|
||
int slot;
|
||
|
||
if ((slot = ze_find_adapter (isa_dev->id_maddr)) < 0)
|
||
return NULL;
|
||
|
||
/*
|
||
* okay, we found a card, so set it up
|
||
*/
|
||
/*
|
||
* Inhibit 16 bit memory delay.
|
||
* POINTETH.SYS apparently does this, for what reason I don't know.
|
||
*/
|
||
pcic_putb (slot, PCIC_CDGC,
|
||
pcic_getb (slot, PCIC_CDGC) | PCIC_16_DL_INH);
|
||
/*
|
||
* things to map
|
||
* (1) card's EEPROM is already mapped by the find_adapter routine
|
||
* but we still need to get the card's ethernet address.
|
||
* after that we unmap that part of attribute memory.
|
||
* (2) card configuration registers need to be mapped in so we
|
||
* can set the configuration and socket # registers.
|
||
* (3) shared memory packet buffer
|
||
* (4) i/o ports
|
||
* (5) IRQ
|
||
*/
|
||
/*
|
||
* Sigh. Location of the ethernet address isn't documented in [1].
|
||
* It was derived by doing a hex dump of all of attribute memory
|
||
* and looking for the IBM vendor prefix.
|
||
*/
|
||
enet_addr[0] = PEEK(isa_dev->id_maddr+0xff0);
|
||
enet_addr[1] = PEEK(isa_dev->id_maddr+0xff2);
|
||
enet_addr[2] = PEEK(isa_dev->id_maddr+0xff4);
|
||
enet_addr[3] = PEEK(isa_dev->id_maddr+0xff6);
|
||
enet_addr[4] = PEEK(isa_dev->id_maddr+0xff8);
|
||
enet_addr[5] = PEEK(isa_dev->id_maddr+0xffa);
|
||
pcic_unmap_memory (slot, 0);
|
||
|
||
/*
|
||
* (2) map card configuration registers. these are offset
|
||
* in card memory space by 0x20000. normally we could get
|
||
* this offset from the card information structure, but I'm
|
||
* too lazy and am not quite sure if I understand the CIS anyway.
|
||
*
|
||
* XXX IF YOU'RE TRYING TO PORT THIS DRIVER FOR A DIFFERENT
|
||
* PCMCIA CARD, the most likely thing to change is the constant
|
||
* 0x20000 in the next statement. Oh yes, also change the
|
||
* card id string that we probe for.
|
||
*/
|
||
pcic_map_memory (slot, 0, kvtop (isa_dev->id_maddr), 0x20000, 8L,
|
||
ATTRIBUTE, 1);
|
||
POKE(isa_dev->id_maddr, 0x80); /* reset the card (how long?) */
|
||
DELAY (10000);
|
||
/*
|
||
* Set the configuration index. According to [1], the adapter won't
|
||
* respond to any i/o signals until we do this; it uses the
|
||
* Memory Only interface (whatever that is; it's not documented).
|
||
* Also turn on "level" (not pulse) interrupts.
|
||
*
|
||
* XXX probably should init the socket and copy register also,
|
||
* so that we can deal with multiple instances of the same card.
|
||
*/
|
||
POKE(isa_dev->id_maddr, 0x41);
|
||
pcic_unmap_memory (slot, 0);
|
||
|
||
/*
|
||
* (3) now map in the shared memory buffer. This has to be mapped
|
||
* as words, not bytes, and on a 16k boundary. The offset value
|
||
* was derived by installing IBM's POINTETH.SYS under DOS and
|
||
* looking at the PCIC registers; it's not documented in IBM's
|
||
* tech ref manual ([1]).
|
||
*/
|
||
pcic_map_memory (slot, 0, kvtop (isa_dev->id_maddr), 0x4000L, 0x4000L,
|
||
COMMON, 2);
|
||
|
||
/*
|
||
* (4) map i/o ports.
|
||
*
|
||
* XXX is it possible that the config file leaves this unspecified,
|
||
* in which case we have to pick one?
|
||
*
|
||
* At least one PCMCIA device driver I'v seen maps a block
|
||
* of 32 consecutive i/o ports as two windows of 16 ports each.
|
||
* Maybe some other pcic chips are restricted to 16-port windows;
|
||
* the 82365SL doesn't seem to have that problem. But since
|
||
* we have an extra window anyway...
|
||
*/
|
||
#ifdef SHARED_MEMORY
|
||
pcic_map_io (slot, 0, isa_dev->id_iobase, 32, 1);
|
||
#else
|
||
pcic_map_io (slot, 0, isa_dev->id_iobase, 16, 1);
|
||
pcic_map_io (slot, 1, isa_dev->id_iobase+16, 16, 2);
|
||
#endif /* SHARED_MEMORY */
|
||
|
||
/*
|
||
* (5) configure the card for the desired interrupt
|
||
*
|
||
* XXX is it possible that the config file leaves this unspecified?
|
||
*/
|
||
pcic_map_irq (slot, ffs (isa_dev->id_irq) - 1);
|
||
|
||
/* tell the PCIC that this is an I/O card (not memory) */
|
||
pcic_putb (slot, PCIC_INT_GEN,
|
||
pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDTYPE);
|
||
|
||
#if 0
|
||
/* tell the PCIC to use level-mode interrupts */
|
||
/* XXX this register may not be present on all controllers */
|
||
pcic_putb (slot, PCIC_GLO_CTRL,
|
||
pcic_getb (slot, PCIC_GLO_CTRL) | PCIC_LVL_MODE);
|
||
#endif
|
||
|
||
#if 0
|
||
pcic_print_regs (slot);
|
||
#endif
|
||
/*
|
||
* Setup i/o addresses
|
||
*/
|
||
sc->nic_addr = isa_dev->id_iobase;
|
||
#if 0
|
||
sc->vector = isa_dev->id_irq;
|
||
#endif
|
||
sc->smem_start = (caddr_t)isa_dev->id_maddr;
|
||
|
||
#if 0
|
||
sc->vendor = ZE_VENDOR_IBM;
|
||
sc->type = xxx;
|
||
#endif
|
||
|
||
/* reset card to force it into a known state */
|
||
tmp = inb (isa_dev->id_iobase + ZE_RESET);
|
||
DELAY(5000);
|
||
outb (isa_dev->id_iobase + ZE_RESET, tmp);
|
||
DELAY(5000);
|
||
|
||
/*
|
||
* query MAM bit in misc register for 10base2
|
||
*/
|
||
tmp = inb (isa_dev->id_iobase + ZE_MISC);
|
||
sc->mau = tmp & 0x09 ? "10base2" : "10baseT";
|
||
|
||
/* set width/size */
|
||
sc->type_str = "IBM PCMCIA";
|
||
memsize = 16*1024;
|
||
sc->memwidth = 16;
|
||
|
||
/* allocate 1 xmit buffer */
|
||
sc->smem_ring = sc->smem_start + (ZE_PAGE_SIZE * ZE_TXBUF_SIZE);
|
||
sc->txb_cnt = 1;
|
||
sc->rec_page_start = ZE_TXBUF_SIZE + ZE_PAGE_OFFSET;
|
||
sc->smem_size = memsize;
|
||
sc->smem_end = sc->smem_start + memsize;
|
||
sc->rec_page_stop = memsize / ZE_PAGE_SIZE + ZE_PAGE_OFFSET;
|
||
sc->tx_page_start = ZE_PAGE_OFFSET;
|
||
|
||
/* get station address */
|
||
for (i = 0; i < ETHER_ADDR_LEN; ++i)
|
||
sc->arpcom.ac_enaddr[i] = enet_addr[i];
|
||
|
||
isa_dev->id_msize = memsize;
|
||
return 32;
|
||
}
|
||
|
||
/*
|
||
* Install interface into kernel networking data structures
|
||
*/
|
||
int
|
||
ze_attach(isa_dev)
|
||
struct isa_device *isa_dev;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[isa_dev->id_unit];
|
||
struct ifnet *ifp = &sc->arpcom.ac_if;
|
||
struct ifaddr *ifa;
|
||
struct sockaddr_dl *sdl;
|
||
|
||
/*
|
||
* Set interface to stopped condition (reset)
|
||
*/
|
||
ze_stop(isa_dev->id_unit);
|
||
|
||
/*
|
||
* Initialize ifnet structure
|
||
*/
|
||
ifp->if_unit = isa_dev->id_unit;
|
||
ifp->if_name = "ze" ;
|
||
ifp->if_mtu = ETHERMTU;
|
||
ifp->if_init = ze_init;
|
||
ifp->if_output = ether_output;
|
||
ifp->if_start = ze_start;
|
||
ifp->if_ioctl = ze_ioctl;
|
||
ifp->if_reset = ze_reset;
|
||
ifp->if_watchdog = ze_watchdog;
|
||
|
||
/*
|
||
* Set default state for IIF_LINK0 flag (used to disable the tranceiver
|
||
* for AUI operation), based on compile-time config option.
|
||
*/
|
||
if (isa_dev->id_flags & ZE_FLAGS_DISABLE_TRANCEIVER)
|
||
ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS
|
||
| IFF_LINK0);
|
||
else
|
||
ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS);
|
||
|
||
/*
|
||
* Attach the interface
|
||
*/
|
||
if_attach(ifp);
|
||
|
||
/*
|
||
* Search down the ifa address list looking for the AF_LINK type entry
|
||
*/
|
||
ifa = ifp->if_addrlist;
|
||
while ((ifa != 0) && (ifa->ifa_addr != 0) &&
|
||
(ifa->ifa_addr->sa_family != AF_LINK))
|
||
ifa = ifa->ifa_next;
|
||
/*
|
||
* If we find an AF_LINK type entry we fill in the hardware address.
|
||
* This is useful for netstat(1) to keep track of which interface
|
||
* is which.
|
||
*/
|
||
if ((ifa != 0) && (ifa->ifa_addr != 0)) {
|
||
/*
|
||
* Fill in the link-level address for this interface
|
||
*/
|
||
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
||
sdl->sdl_type = IFT_ETHER;
|
||
sdl->sdl_alen = ETHER_ADDR_LEN;
|
||
sdl->sdl_slen = 0;
|
||
bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
|
||
}
|
||
|
||
/*
|
||
* Print additional info when attached
|
||
*/
|
||
printf("ze%d: address %s, type %s (%dbit)%s, MAU %s\n",
|
||
isa_dev->id_unit,
|
||
ether_sprintf(sc->arpcom.ac_enaddr), sc->type_str,
|
||
sc->memwidth,
|
||
(ifp->if_flags & IFF_LINK0 ? " [tranceiver disabled]" : ""),
|
||
sc->mau);
|
||
|
||
/*
|
||
* If BPF is in the kernel, call the attach for it
|
||
*/
|
||
#if NBPFILTER > 0
|
||
bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
|
||
#endif
|
||
return 1;
|
||
}
|
||
|
||
/*
|
||
* Reset interface.
|
||
*/
|
||
void
|
||
ze_reset(unit)
|
||
int unit;
|
||
{
|
||
int s;
|
||
|
||
s = splnet();
|
||
|
||
/*
|
||
* Stop interface and re-initialize.
|
||
*/
|
||
ze_stop(unit);
|
||
ze_init(unit);
|
||
|
||
(void) splx(s);
|
||
}
|
||
|
||
/*
|
||
* Take interface offline.
|
||
*/
|
||
void
|
||
ze_stop(unit)
|
||
int unit;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[unit];
|
||
int n = 5000;
|
||
|
||
/*
|
||
* Stop everything on the interface, and select page 0 registers.
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STP);
|
||
|
||
/*
|
||
* Wait for interface to enter stopped state, but limit # of checks
|
||
* to 'n' (about 5ms). It shouldn't even take 5us on modern
|
||
* DS8390's, but just in case it's an old one.
|
||
*/
|
||
while (((inb(sc->nic_addr + ZE_P0_ISR) & ZE_ISR_RST) == 0) && --n);
|
||
|
||
}
|
||
|
||
/*
|
||
* Device timeout/watchdog routine. Entered if the device neglects to
|
||
* generate an interrupt after a transmit has been started on it.
|
||
*/
|
||
void
|
||
ze_watchdog(unit)
|
||
int unit;
|
||
{
|
||
#if 1
|
||
struct ze_softc *sc = &ze_softc[unit];
|
||
u_char isr, imr;
|
||
u_short imask;
|
||
|
||
/* select page zero */
|
||
outb (sc->nic_addr + ZE_P0_CR,
|
||
(inb (sc->nic_addr + ZE_P0_CR) & 0x3f) | ZE_CR_PAGE_0);
|
||
|
||
/* read interrupt status register */
|
||
isr = inb (sc->nic_addr + ZE_P0_ISR) & 0xff;
|
||
|
||
/* select page two */
|
||
outb (sc->nic_addr + ZE_P0_CR,
|
||
(inb (sc->nic_addr + ZE_P0_CR) & 0x3f) | ZE_CR_PAGE_2);
|
||
|
||
/* read interrupt mask register */
|
||
imr = inb (sc->nic_addr + ZE_P2_IMR) & 0xff;
|
||
|
||
imask = inb(IO_ICU2) << 8 | inb(IO_ICU1);
|
||
|
||
log (LOG_ERR, "ze%d: device timeout, isr=%02x, imr=%02x, imask=%04x\n",
|
||
unit, isr, imr, imask);
|
||
#else
|
||
log(LOG_ERR, "ze%d: device timeout\n", unit);
|
||
#endif
|
||
|
||
ze_reset(unit);
|
||
}
|
||
|
||
/*
|
||
* Initialize device.
|
||
*/
|
||
void
|
||
ze_init(unit)
|
||
int unit;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[unit];
|
||
struct ifnet *ifp = &sc->arpcom.ac_if;
|
||
int i, s;
|
||
u_char command;
|
||
|
||
|
||
/* address not known */
|
||
if (ifp->if_addrlist == (struct ifaddr *)0) return;
|
||
|
||
/*
|
||
* Initialize the NIC in the exact order outlined in the NS manual.
|
||
* This init procedure is "mandatory"...don't change what or when
|
||
* things happen.
|
||
*/
|
||
s = splnet();
|
||
|
||
/* reset transmitter flags */
|
||
sc->data_buffered = 0;
|
||
sc->xmit_busy = 0;
|
||
sc->arpcom.ac_if.if_timer = 0;
|
||
|
||
sc->txb_next = 0;
|
||
|
||
/* This variable is used below - don't move this assignment */
|
||
sc->next_packet = sc->rec_page_start + 1;
|
||
|
||
/*
|
||
* Set interface for page 0, Remote DMA complete, Stopped
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STP);
|
||
|
||
if (sc->memwidth == 16) {
|
||
/*
|
||
* Set FIFO threshold to 8, No auto-init Remote DMA,
|
||
* byte order=80x86, word-wide DMA xfers
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_DCR, ZE_DCR_FT1|ZE_DCR_WTS);
|
||
} else {
|
||
/*
|
||
* Same as above, but byte-wide DMA xfers
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_DCR, ZE_DCR_FT1);
|
||
}
|
||
|
||
/*
|
||
* Clear Remote Byte Count Registers
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_RBCR0, 0);
|
||
outb(sc->nic_addr + ZE_P0_RBCR1, 0);
|
||
|
||
/*
|
||
* Enable reception of broadcast packets
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_RCR, ZE_RCR_AB);
|
||
|
||
/*
|
||
* Place NIC in internal loopback mode
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_TCR, ZE_TCR_LB0);
|
||
|
||
/*
|
||
* Initialize transmit/receive (ring-buffer) Page Start
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_TPSR, sc->tx_page_start);
|
||
outb(sc->nic_addr + ZE_P0_PSTART, sc->rec_page_start);
|
||
|
||
/*
|
||
* Initialize Receiver (ring-buffer) Page Stop and Boundry
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_PSTOP, sc->rec_page_stop);
|
||
outb(sc->nic_addr + ZE_P0_BNRY, sc->rec_page_start);
|
||
|
||
/*
|
||
* Clear all interrupts. A '1' in each bit position clears the
|
||
* corresponding flag.
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_ISR, 0xff);
|
||
|
||
/*
|
||
* Enable the following interrupts: receive/transmit complete,
|
||
* receive/transmit error, and Receiver OverWrite.
|
||
*
|
||
* Counter overflow and Remote DMA complete are *not* enabled.
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_IMR,
|
||
ZE_IMR_PRXE|ZE_IMR_PTXE|ZE_IMR_RXEE|ZE_IMR_TXEE|ZE_IMR_OVWE);
|
||
|
||
/*
|
||
* Program Command Register for page 1
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_CR_STP);
|
||
|
||
/*
|
||
* Copy out our station address
|
||
*/
|
||
for (i = 0; i < ETHER_ADDR_LEN; ++i)
|
||
outb(sc->nic_addr + ZE_P1_PAR0 + i, sc->arpcom.ac_enaddr[i]);
|
||
|
||
#if NBPFILTER > 0
|
||
/*
|
||
* Initialize multicast address hashing registers to accept
|
||
* all multicasts (only used when in promiscuous mode)
|
||
*/
|
||
for (i = 0; i < 8; ++i)
|
||
outb(sc->nic_addr + ZE_P1_MAR0 + i, 0xff);
|
||
#endif
|
||
|
||
/*
|
||
* Set Current Page pointer to next_packet (initialized above)
|
||
*/
|
||
outb(sc->nic_addr + ZE_P1_CURR, sc->next_packet);
|
||
|
||
/*
|
||
* Set Command Register for page 0, Remote DMA complete,
|
||
* and interface Start.
|
||
*/
|
||
outb(sc->nic_addr + ZE_P1_CR, ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
/*
|
||
* Take interface out of loopback
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_TCR, 0);
|
||
|
||
#if 0
|
||
/*
|
||
* If this is a 3Com board, the tranceiver must be software enabled
|
||
* (there is no settable hardware default).
|
||
*/
|
||
if (sc->vendor == ZE_VENDOR_3COM) {
|
||
if (ifp->if_flags & IFF_LINK0) {
|
||
outb(sc->asic_addr + ZE_3COM_CR, 0);
|
||
} else {
|
||
outb(sc->asic_addr + ZE_3COM_CR, ZE_3COM_CR_XSEL);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Set 'running' flag, and clear output active flag.
|
||
*/
|
||
ifp->if_flags |= IFF_RUNNING;
|
||
ifp->if_flags &= ~IFF_OACTIVE;
|
||
|
||
/*
|
||
* ...and attempt to start output
|
||
*/
|
||
ze_start(ifp);
|
||
|
||
(void) splx(s);
|
||
}
|
||
|
||
/*
|
||
* This routine actually starts the transmission on the interface
|
||
*/
|
||
static inline void
|
||
ze_xmit(ifp)
|
||
struct ifnet *ifp;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[ifp->if_unit];
|
||
u_short len = sc->txb_next_len;
|
||
|
||
/*
|
||
* Set NIC for page 0 register access
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
/*
|
||
* Set TX buffer start page
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_TPSR, sc->tx_page_start +
|
||
sc->txb_next * ZE_TXBUF_SIZE);
|
||
|
||
/*
|
||
* Set TX length
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_TBCR0, len & 0xff);
|
||
outb(sc->nic_addr + ZE_P0_TBCR1, len >> 8);
|
||
|
||
/*
|
||
* Set page 0, Remote DMA complete, Transmit Packet, and *Start*
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_TXP|ZE_CR_STA);
|
||
|
||
sc->xmit_busy = 1;
|
||
sc->data_buffered = 0;
|
||
|
||
/*
|
||
* Switch buffers if we are doing double-buffered transmits
|
||
*/
|
||
if ((sc->txb_next == 0) && (sc->txb_cnt > 1))
|
||
sc->txb_next = 1;
|
||
else
|
||
sc->txb_next = 0;
|
||
|
||
/*
|
||
* Set a timer just in case we never hear from the board again
|
||
*/
|
||
ifp->if_timer = 2;
|
||
}
|
||
|
||
/*
|
||
* Start output on interface.
|
||
* We make two assumptions here:
|
||
* 1) that the current priority is set to splnet _before_ this code
|
||
* is called *and* is returned to the appropriate priority after
|
||
* return
|
||
* 2) that the IFF_OACTIVE flag is checked before this code is called
|
||
* (i.e. that the output part of the interface is idle)
|
||
*/
|
||
void
|
||
ze_start(ifp)
|
||
struct ifnet *ifp;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[ifp->if_unit];
|
||
struct mbuf *m0, *m;
|
||
caddr_t buffer;
|
||
int len;
|
||
u_char laar_tmp;
|
||
|
||
outloop:
|
||
/*
|
||
* See if there is room to send more data (i.e. one or both of the
|
||
* buffers is empty).
|
||
*/
|
||
if (sc->data_buffered)
|
||
if (sc->xmit_busy) {
|
||
/*
|
||
* No room. Indicate this to the outside world
|
||
* and exit.
|
||
*/
|
||
ifp->if_flags |= IFF_OACTIVE;
|
||
return;
|
||
} else {
|
||
/*
|
||
* Data is buffered, but we're not transmitting, so
|
||
* start the xmit on the buffered data.
|
||
* Note that ze_xmit() resets the data_buffered flag
|
||
* before returning.
|
||
*/
|
||
ze_xmit(ifp);
|
||
}
|
||
|
||
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
|
||
if (m == NULL) {
|
||
/*
|
||
* The following isn't pretty; we are using the !OACTIVE flag to
|
||
* indicate to the outside world that we can accept an additional
|
||
* packet rather than that the transmitter is _actually_
|
||
* active. Indeed, the transmitter may be active, but if we haven't
|
||
* filled the secondary buffer with data then we still want to
|
||
* accept more.
|
||
* Note that it isn't necessary to test the data_buffered flag -
|
||
* we wouldn't have tried to de-queue the packet in the first place
|
||
* if it was set.
|
||
*/
|
||
ifp->if_flags &= ~IFF_OACTIVE;
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Copy the mbuf chain into the transmit buffer
|
||
*/
|
||
#if 0
|
||
/*
|
||
* Enable 16bit access to shared memory on WD/SMC boards
|
||
*/
|
||
if (sc->memwidth == 16)
|
||
if (sc->vendor == ZE_VENDOR_WD_SMC) {
|
||
laar_tmp = inb(sc->asic_addr + ZE_WD_LAAR);
|
||
outb(sc->asic_addr + ZE_WD_LAAR, laar_tmp | ZE_WD_LAAR_M16EN);
|
||
}
|
||
#endif
|
||
|
||
buffer = sc->smem_start + (sc->txb_next * ZE_TXBUF_SIZE * ZE_PAGE_SIZE);
|
||
len = 0;
|
||
for (m0 = m; m != 0; m = m->m_next) {
|
||
bcopy(mtod(m, caddr_t), buffer, m->m_len);
|
||
buffer += m->m_len;
|
||
len += m->m_len;
|
||
}
|
||
|
||
#if 0
|
||
/*
|
||
* Restore previous shared mem access type
|
||
*/
|
||
if (sc->memwidth == 16)
|
||
if (sc->vendor == ZE_VENDOR_WD_SMC) {
|
||
outb(sc->asic_addr + ZE_WD_LAAR, laar_tmp);
|
||
}
|
||
#endif
|
||
|
||
sc->txb_next_len = max(len, ETHER_MIN_LEN);
|
||
|
||
if (sc->txb_cnt > 1)
|
||
/*
|
||
* only set 'buffered' flag if doing multiple buffers
|
||
*/
|
||
sc->data_buffered = 1;
|
||
|
||
if (sc->xmit_busy == 0)
|
||
ze_xmit(ifp);
|
||
/*
|
||
* If there is BPF support in the configuration, tap off here.
|
||
* The following has support for converting trailer packets
|
||
* back to normal.
|
||
*/
|
||
#if NBPFILTER > 0
|
||
if (sc->bpf) {
|
||
u_short etype;
|
||
int off, datasize, resid;
|
||
struct ether_header *eh;
|
||
struct trailer_header {
|
||
u_short ether_type;
|
||
u_short ether_residual;
|
||
} trailer_header;
|
||
char ether_packet[ETHER_MAX_LEN];
|
||
char *ep;
|
||
|
||
ep = ether_packet;
|
||
|
||
/*
|
||
* We handle trailers below:
|
||
* Copy ether header first, then residual data,
|
||
* then data. Put all this in a temporary buffer
|
||
* 'ether_packet' and send off to bpf. Since the
|
||
* system has generated this packet, we assume
|
||
* that all of the offsets in the packet are
|
||
* correct; if they're not, the system will almost
|
||
* certainly crash in m_copydata.
|
||
* We make no assumptions about how the data is
|
||
* arranged in the mbuf chain (i.e. how much
|
||
* data is in each mbuf, if mbuf clusters are
|
||
* used, etc.), which is why we use m_copydata
|
||
* to get the ether header rather than assume
|
||
* that this is located in the first mbuf.
|
||
*/
|
||
/* copy ether header */
|
||
m_copydata(m0, 0, sizeof(struct ether_header), ep);
|
||
eh = (struct ether_header *) ep;
|
||
ep += sizeof(struct ether_header);
|
||
etype = ntohs(eh->ether_type);
|
||
if (etype >= ETHERTYPE_TRAIL &&
|
||
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
|
||
datasize = ((etype - ETHERTYPE_TRAIL) << 9);
|
||
off = datasize + sizeof(struct ether_header);
|
||
|
||
/* copy trailer_header into a data structure */
|
||
m_copydata(m0, off, sizeof(struct trailer_header),
|
||
&trailer_header.ether_type);
|
||
|
||
/* copy residual data */
|
||
m_copydata(m0, off+sizeof(struct trailer_header),
|
||
resid = ntohs(trailer_header.ether_residual) -
|
||
sizeof(struct trailer_header), ep);
|
||
ep += resid;
|
||
|
||
/* copy data */
|
||
m_copydata(m0, sizeof(struct ether_header),
|
||
datasize, ep);
|
||
ep += datasize;
|
||
|
||
/* restore original ether packet type */
|
||
eh->ether_type = trailer_header.ether_type;
|
||
|
||
bpf_tap(sc->bpf, ether_packet, ep - ether_packet);
|
||
} else
|
||
bpf_mtap(sc->bpf, m0);
|
||
}
|
||
#endif
|
||
|
||
m_freem(m0);
|
||
|
||
/*
|
||
* If we are doing double-buffering, a buffer might be free to
|
||
* fill with another packet, so loop back to the top.
|
||
*/
|
||
if (sc->txb_cnt > 1)
|
||
goto outloop;
|
||
else {
|
||
ifp->if_flags |= IFF_OACTIVE;
|
||
return;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Ethernet interface receiver interrupt.
|
||
*/
|
||
static inline void /* only called from one place, so may as well integrate */
|
||
ze_rint(unit)
|
||
int unit;
|
||
{
|
||
register struct ze_softc *sc = &ze_softc[unit];
|
||
u_char boundry, current;
|
||
u_short len;
|
||
struct ze_ring *packet_ptr;
|
||
|
||
/*
|
||
* Set NIC to page 1 registers to get 'current' pointer
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
/*
|
||
* 'sc->next_packet' is the logical beginning of the ring-buffer - i.e.
|
||
* it points to where new data has been buffered. The 'CURR'
|
||
* (current) register points to the logical end of the ring-buffer
|
||
* - i.e. it points to where additional new data will be added.
|
||
* We loop here until the logical beginning equals the logical
|
||
* end (or in other words, until the ring-buffer is empty).
|
||
*/
|
||
while (sc->next_packet != inb(sc->nic_addr + ZE_P1_CURR)) {
|
||
|
||
/* get pointer to this buffer header structure */
|
||
packet_ptr = (struct ze_ring *)(sc->smem_ring +
|
||
(sc->next_packet - sc->rec_page_start) * ZE_PAGE_SIZE);
|
||
|
||
/*
|
||
* The byte count includes the FCS - Frame Check Sequence (a
|
||
* 32 bit CRC).
|
||
*/
|
||
len = packet_ptr->count;
|
||
if ((len >= ETHER_MIN_LEN) && (len <= ETHER_MAX_LEN)) {
|
||
/*
|
||
* Go get packet. len - 4 removes CRC from length.
|
||
* (packet_ptr + 1) points to data just after the packet ring
|
||
* header (+4 bytes)
|
||
*/
|
||
ze_get_packet(sc, (caddr_t)(packet_ptr + 1), len - 4);
|
||
++sc->arpcom.ac_if.if_ipackets;
|
||
} else {
|
||
/*
|
||
* Really BAD...probably indicates that the ring pointers
|
||
* are corrupted. Also seen on early rev chips under
|
||
* high load - the byte order of the length gets switched.
|
||
*/
|
||
log(LOG_ERR,
|
||
"ze%d: shared memory corrupt - invalid packet length %d\n",
|
||
unit, len);
|
||
ze_reset(unit);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Update next packet pointer
|
||
*/
|
||
sc->next_packet = packet_ptr->next_packet;
|
||
|
||
/*
|
||
* Update NIC boundry pointer - being careful to keep it
|
||
* one buffer behind. (as recommended by NS databook)
|
||
*/
|
||
boundry = sc->next_packet - 1;
|
||
if (boundry < sc->rec_page_start)
|
||
boundry = sc->rec_page_stop - 1;
|
||
|
||
/*
|
||
* Set NIC to page 0 registers to update boundry register
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
outb(sc->nic_addr + ZE_P0_BNRY, boundry);
|
||
|
||
/*
|
||
* Set NIC to page 1 registers before looping to top (prepare to
|
||
* get 'CURR' current pointer)
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_PAGE_1|ZE_CR_RD2|ZE_CR_STA);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Ethernet interface interrupt processor
|
||
*/
|
||
void
|
||
zeintr(unit)
|
||
int unit;
|
||
{
|
||
struct ze_softc *sc = &ze_softc[unit];
|
||
u_char isr;
|
||
|
||
/*
|
||
* Set NIC to page 0 registers
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
/*
|
||
* loop until there are no more new interrupts
|
||
*/
|
||
while (isr = inb(sc->nic_addr + ZE_P0_ISR)) {
|
||
|
||
/*
|
||
* reset all the bits that we are 'acknowleging'
|
||
* by writing a '1' to each bit position that was set
|
||
* (writing a '1' *clears* the bit)
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_ISR, isr);
|
||
|
||
/*
|
||
* Transmit error. If a TX completed with an error, we end up
|
||
* throwing the packet away. Really the only error that is
|
||
* possible is excessive collisions, and in this case it is
|
||
* best to allow the automatic mechanisms of TCP to backoff
|
||
* the flow. Of course, with UDP we're screwed, but this is
|
||
* expected when a network is heavily loaded.
|
||
*/
|
||
if (isr & ZE_ISR_TXE) {
|
||
u_char tsr = inb(sc->nic_addr + ZE_P0_TSR);
|
||
u_char ncr = inb(sc->nic_addr + ZE_P0_NCR);
|
||
|
||
/*
|
||
* Excessive collisions (16)
|
||
*/
|
||
if ((tsr & ZE_TSR_ABT) && (ncr == 0)) {
|
||
/*
|
||
* When collisions total 16, the P0_NCR will
|
||
* indicate 0, and the TSR_ABT is set.
|
||
*/
|
||
sc->arpcom.ac_if.if_collisions += 16;
|
||
} else
|
||
sc->arpcom.ac_if.if_collisions += ncr;
|
||
|
||
/*
|
||
* update output errors counter
|
||
*/
|
||
++sc->arpcom.ac_if.if_oerrors;
|
||
|
||
/*
|
||
* reset tx busy and output active flags
|
||
*/
|
||
sc->xmit_busy = 0;
|
||
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
|
||
|
||
/*
|
||
* clear watchdog timer
|
||
*/
|
||
sc->arpcom.ac_if.if_timer = 0;
|
||
}
|
||
|
||
|
||
/*
|
||
* Receiver Error. One or more of: CRC error, frame alignment error
|
||
* FIFO overrun, or missed packet.
|
||
*/
|
||
if (isr & ZE_ISR_RXE) {
|
||
++sc->arpcom.ac_if.if_ierrors;
|
||
#ifdef ZE_DEBUG
|
||
#if 0
|
||
printf("ze%d: receive error %x\n", unit,
|
||
inb(sc->nic_addr + ZE_P0_RSR));
|
||
#else
|
||
printf("ze%d: receive error %b\n", unit,
|
||
inb(sc->nic_addr + ZE_P0_RSR),
|
||
"\20\8DEF\7REC DISAB\6PHY/MC\5MISSED\4OVR\3ALIGN\2FCS\1RCVD");
|
||
#endif
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
* Overwrite warning. In order to make sure that a lockup
|
||
* of the local DMA hasn't occurred, we reset and
|
||
* re-init the NIC. The NSC manual suggests only a
|
||
* partial reset/re-init is necessary - but some
|
||
* chips seem to want more. The DMA lockup has been
|
||
* seen only with early rev chips - Methinks this
|
||
* bug was fixed in later revs. -DG
|
||
*/
|
||
if (isr & ZE_ISR_OVW) {
|
||
++sc->arpcom.ac_if.if_ierrors;
|
||
#if 0
|
||
/* sigh. this happens too often on our net */
|
||
log(LOG_WARNING,
|
||
"ze%d: warning - receiver ring buffer overrun\n",
|
||
unit);
|
||
#endif
|
||
/*
|
||
* Stop/reset/re-init NIC
|
||
*/
|
||
ze_reset(unit);
|
||
}
|
||
|
||
/*
|
||
* Transmission completed normally.
|
||
*/
|
||
if (isr & ZE_ISR_PTX) {
|
||
|
||
/*
|
||
* reset tx busy and output active flags
|
||
*/
|
||
sc->xmit_busy = 0;
|
||
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
|
||
|
||
/*
|
||
* clear watchdog timer
|
||
*/
|
||
sc->arpcom.ac_if.if_timer = 0;
|
||
|
||
/*
|
||
* Update total number of successfully transmitted
|
||
* packets.
|
||
*/
|
||
++sc->arpcom.ac_if.if_opackets;
|
||
|
||
/*
|
||
* Add in total number of collisions on last
|
||
* transmission.
|
||
*/
|
||
sc->arpcom.ac_if.if_collisions += inb(sc->nic_addr +
|
||
ZE_P0_TBCR0);
|
||
}
|
||
|
||
/*
|
||
* Receive Completion. Go and get the packet.
|
||
* XXX - Doing this on an error is dubious because there
|
||
* shouldn't be any data to get (we've configured the
|
||
* interface to not accept packets with errors).
|
||
*/
|
||
if (isr & (ZE_ISR_PRX|ZE_ISR_RXE)) {
|
||
#if 0
|
||
/*
|
||
* Enable access to shared memory on WD/SMC boards
|
||
*/
|
||
if (sc->memwidth == 16)
|
||
if (sc->vendor == ZE_VENDOR_WD_SMC) {
|
||
outb(sc->asic_addr + ZE_WD_LAAR,
|
||
inb(sc->asic_addr + ZE_WD_LAAR)
|
||
| ZE_WD_LAAR_M16EN);
|
||
}
|
||
#endif
|
||
ze_rint (unit);
|
||
|
||
#if 0
|
||
/*
|
||
* Disable access to shared memory
|
||
*/
|
||
if (sc->memwidth == 16)
|
||
if (sc->vendor == ZE_VENDOR_WD_SMC) {
|
||
outb(sc->asic_addr + ZE_WD_LAAR,
|
||
inb(sc->asic_addr + ZE_WD_LAAR)
|
||
& ~ZE_WD_LAAR_M16EN);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
* If it looks like the transmitter can take more data,
|
||
* attempt to start output on the interface. If data is
|
||
* already buffered and ready to go, send it first.
|
||
*/
|
||
if ((sc->arpcom.ac_if.if_flags & IFF_OACTIVE) == 0) {
|
||
if (sc->data_buffered)
|
||
ze_xmit(&sc->arpcom.ac_if);
|
||
ze_start(&sc->arpcom.ac_if);
|
||
}
|
||
|
||
/*
|
||
* return NIC CR to standard state: page 0, remote DMA complete,
|
||
* start (toggling the TXP bit off, even if was just set
|
||
* in the transmit routine, is *okay* - it is 'edge'
|
||
* triggered from low to high)
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_CR, ZE_CR_RD2|ZE_CR_STA);
|
||
|
||
/*
|
||
* If the Network Talley Counters overflow, read them to
|
||
* reset them. It appears that old 8390's won't
|
||
* clear the ISR flag otherwise - resulting in an
|
||
* infinite loop.
|
||
*/
|
||
if (isr & ZE_ISR_CNT) {
|
||
(void) inb(sc->nic_addr + ZE_P0_CNTR0);
|
||
(void) inb(sc->nic_addr + ZE_P0_CNTR1);
|
||
(void) inb(sc->nic_addr + ZE_P0_CNTR2);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Process an ioctl request. This code needs some work - it looks
|
||
* pretty ugly.
|
||
*/
|
||
int
|
||
ze_ioctl(ifp, command, data)
|
||
register struct ifnet *ifp;
|
||
int command;
|
||
caddr_t data;
|
||
{
|
||
register struct ifaddr *ifa = (struct ifaddr *)data;
|
||
struct ze_softc *sc = &ze_softc[ifp->if_unit];
|
||
struct ifreq *ifr = (struct ifreq *)data;
|
||
int s, error = 0;
|
||
|
||
s = splnet();
|
||
|
||
switch (command) {
|
||
|
||
case SIOCSIFADDR:
|
||
ifp->if_flags |= IFF_UP;
|
||
|
||
switch (ifa->ifa_addr->sa_family) {
|
||
#ifdef INET
|
||
case AF_INET:
|
||
ze_init(ifp->if_unit); /* before arpwhohas */
|
||
/*
|
||
* See if another station has *our* IP address.
|
||
* i.e.: There is an address conflict! If a
|
||
* conflict exists, a message is sent to the
|
||
* console.
|
||
*/
|
||
((struct arpcom *)ifp)->ac_ipaddr =
|
||
IA_SIN(ifa)->sin_addr;
|
||
arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr);
|
||
break;
|
||
#endif
|
||
#ifdef NS
|
||
/*
|
||
* XXX - This code is probably wrong
|
||
*/
|
||
case AF_NS:
|
||
{
|
||
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
|
||
|
||
if (ns_nullhost(*ina))
|
||
ina->x_host =
|
||
*(union ns_host *)(sc->arpcom.ac_enaddr);
|
||
else {
|
||
/*
|
||
*
|
||
*/
|
||
bcopy((caddr_t)ina->x_host.c_host,
|
||
(caddr_t)sc->arpcom.ac_enaddr,
|
||
sizeof(sc->arpcom.ac_enaddr));
|
||
}
|
||
/*
|
||
* Set new address
|
||
*/
|
||
ze_init(ifp->if_unit);
|
||
break;
|
||
}
|
||
#endif
|
||
default:
|
||
ze_init(ifp->if_unit);
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case SIOCSIFFLAGS:
|
||
/*
|
||
* If interface is marked down and it is running, then stop it
|
||
*/
|
||
if (((ifp->if_flags & IFF_UP) == 0) &&
|
||
(ifp->if_flags & IFF_RUNNING)) {
|
||
ze_stop(ifp->if_unit);
|
||
ifp->if_flags &= ~IFF_RUNNING;
|
||
} else {
|
||
/*
|
||
* If interface is marked up and it is stopped, then start it
|
||
*/
|
||
if ((ifp->if_flags & IFF_UP) &&
|
||
((ifp->if_flags & IFF_RUNNING) == 0))
|
||
ze_init(ifp->if_unit);
|
||
}
|
||
#if NBPFILTER > 0
|
||
if (ifp->if_flags & IFF_PROMISC) {
|
||
/*
|
||
* Set promiscuous mode on interface.
|
||
* XXX - for multicasts to work, we would need to
|
||
* write 1's in all bits of multicast
|
||
* hashing array. For now we assume that
|
||
* this was done in ze_init().
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_RCR,
|
||
ZE_RCR_PRO|ZE_RCR_AM|ZE_RCR_AB);
|
||
} else {
|
||
/*
|
||
* XXX - for multicasts to work, we would need to
|
||
* rewrite the multicast hashing array with the
|
||
* proper hash (would have been destroyed above).
|
||
*/
|
||
outb(sc->nic_addr + ZE_P0_RCR, ZE_RCR_AB);
|
||
}
|
||
#endif
|
||
#if 0
|
||
/*
|
||
* An unfortunate hack to provide the (required) software control
|
||
* of the tranceiver for 3Com boards. The LLC0 flag disables
|
||
* the tranceiver if set.
|
||
*/
|
||
if (sc->vendor == ZE_VENDOR_3COM) {
|
||
if (ifp->if_flags & IFF_LINK0) {
|
||
outb(sc->asic_addr + ZE_3COM_CR, 0);
|
||
} else {
|
||
outb(sc->asic_addr + ZE_3COM_CR, ZE_3COM_CR_XSEL);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
break;
|
||
|
||
default:
|
||
error = EINVAL;
|
||
}
|
||
(void) splx(s);
|
||
return (error);
|
||
}
|
||
|
||
/*
|
||
* Macro to calculate a new address within shared memory when given an offset
|
||
* from an address, taking into account ring-wrap.
|
||
*/
|
||
#define ringoffset(sc, start, off, type) \
|
||
((type)( ((caddr_t)(start)+(off) >= (sc)->smem_end) ? \
|
||
(((caddr_t)(start)+(off))) - (sc)->smem_end \
|
||
+ (sc)->smem_ring: \
|
||
((caddr_t)(start)+(off)) ))
|
||
|
||
/*
|
||
* Retreive packet from shared memory and send to the next level up via
|
||
* ether_input(). If there is a BPF listener, give a copy to BPF, too.
|
||
*/
|
||
void
|
||
ze_get_packet(sc, buf, len)
|
||
struct ze_softc *sc;
|
||
char *buf;
|
||
u_short len;
|
||
{
|
||
struct ether_header *eh;
|
||
struct mbuf *m, *head = NULL, *ze_ring_to_mbuf();
|
||
u_short off;
|
||
int resid;
|
||
u_short etype;
|
||
struct trailer_header {
|
||
u_short trail_type;
|
||
u_short trail_residual;
|
||
} trailer_header;
|
||
|
||
/* Allocate a header mbuf */
|
||
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
||
if (m == NULL)
|
||
goto bad;
|
||
m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
|
||
m->m_pkthdr.len = len;
|
||
m->m_len = 0;
|
||
head = m;
|
||
|
||
eh = (struct ether_header *)buf;
|
||
|
||
/* The following sillines is to make NFS happy */
|
||
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
|
||
#define EOFF (EROUND - sizeof(struct ether_header))
|
||
|
||
/*
|
||
* The following assumes there is room for
|
||
* the ether header in the header mbuf
|
||
*/
|
||
head->m_data += EOFF;
|
||
bcopy(buf, mtod(head, caddr_t), sizeof(struct ether_header));
|
||
buf += sizeof(struct ether_header);
|
||
head->m_len += sizeof(struct ether_header);
|
||
len -= sizeof(struct ether_header);
|
||
|
||
etype = ntohs((u_short)eh->ether_type);
|
||
|
||
/*
|
||
* Deal with trailer protocol:
|
||
* If trailer protocol, calculate the datasize as 'off',
|
||
* which is also the offset to the trailer header.
|
||
* Set resid to the amount of packet data following the
|
||
* trailer header.
|
||
* Finally, copy residual data into mbuf chain.
|
||
*/
|
||
if (etype >= ETHERTYPE_TRAIL &&
|
||
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
|
||
|
||
off = (etype - ETHERTYPE_TRAIL) << 9;
|
||
if ((off + sizeof(struct trailer_header)) > len)
|
||
goto bad; /* insanity */
|
||
|
||
eh->ether_type = *ringoffset(sc, buf, off, u_short *);
|
||
resid = ntohs(*ringoffset(sc, buf, off+2, u_short *));
|
||
|
||
if ((off + resid) > len) goto bad; /* insanity */
|
||
|
||
resid -= sizeof(struct trailer_header);
|
||
if (resid < 0) goto bad; /* insanity */
|
||
|
||
m = ze_ring_to_mbuf(sc, ringoffset(sc, buf, off+4, char *), head, resid);
|
||
if (m == NULL) goto bad;
|
||
|
||
len = off;
|
||
head->m_pkthdr.len -= 4; /* subtract trailer header */
|
||
}
|
||
|
||
/*
|
||
* Pull packet off interface. Or if this was a trailer packet,
|
||
* the data portion is appended.
|
||
*/
|
||
m = ze_ring_to_mbuf(sc, buf, m, len);
|
||
if (m == NULL) goto bad;
|
||
|
||
#if NBPFILTER > 0
|
||
/*
|
||
* Check if there's a BPF listener on this interface.
|
||
* If so, hand off the raw packet to bpf.
|
||
*/
|
||
if (sc->bpf) {
|
||
bpf_mtap(sc->bpf, head);
|
||
|
||
/*
|
||
* Note that the interface cannot be in promiscuous mode if
|
||
* there are no BPF listeners. And if we are in promiscuous
|
||
* mode, we have to check if this packet is really ours.
|
||
*
|
||
* XXX This test does not support multicasts.
|
||
*/
|
||
if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
|
||
bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
|
||
sizeof(eh->ether_dhost)) != 0 &&
|
||
bcmp(eh->ether_dhost, etherbroadcastaddr,
|
||
sizeof(eh->ether_dhost)) != 0) {
|
||
|
||
m_freem(head);
|
||
return;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Fix up data start offset in mbuf to point past ether header
|
||
*/
|
||
m_adj(head, sizeof(struct ether_header));
|
||
|
||
/*
|
||
* silly ether_input routine needs 'type' in host byte order
|
||
*/
|
||
eh->ether_type = ntohs(eh->ether_type);
|
||
|
||
ether_input(&sc->arpcom.ac_if, eh, head);
|
||
return;
|
||
|
||
bad: if (head)
|
||
m_freem(head);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Supporting routines
|
||
*/
|
||
|
||
/*
|
||
* Given a source and destination address, copy 'amount' of a packet from
|
||
* the ring buffer into a linear destination buffer. Takes into account
|
||
* ring-wrap.
|
||
*/
|
||
static inline char *
|
||
ze_ring_copy(sc,src,dst,amount)
|
||
struct ze_softc *sc;
|
||
char *src;
|
||
char *dst;
|
||
u_short amount;
|
||
{
|
||
u_short tmp_amount;
|
||
|
||
/* does copy wrap to lower addr in ring buffer? */
|
||
if (src + amount > sc->smem_end) {
|
||
tmp_amount = sc->smem_end - src;
|
||
bcopy(src,dst,tmp_amount); /* copy amount up to end of smem */
|
||
amount -= tmp_amount;
|
||
src = sc->smem_ring;
|
||
dst += tmp_amount;
|
||
}
|
||
|
||
bcopy(src, dst, amount);
|
||
|
||
return(src + amount);
|
||
}
|
||
|
||
/*
|
||
* Copy data from receive buffer to end of mbuf chain
|
||
* allocate additional mbufs as needed. return pointer
|
||
* to last mbuf in chain.
|
||
* sc = ze info (softc)
|
||
* src = pointer in ze ring buffer
|
||
* dst = pointer to last mbuf in mbuf chain to copy to
|
||
* amount = amount of data to copy
|
||
*/
|
||
struct mbuf *
|
||
ze_ring_to_mbuf(sc,src,dst,total_len)
|
||
struct ze_softc *sc;
|
||
char *src;
|
||
struct mbuf *dst;
|
||
u_short total_len;
|
||
{
|
||
register struct mbuf *m = dst;
|
||
|
||
while (total_len) {
|
||
register u_short amount = min(total_len, M_TRAILINGSPACE(m));
|
||
|
||
if (amount == 0) { /* no more data in this mbuf, alloc another */
|
||
/*
|
||
* If there is enough data for an mbuf cluster, attempt
|
||
* to allocate one of those, otherwise, a regular
|
||
* mbuf will do.
|
||
* Note that a regular mbuf is always required, even if
|
||
* we get a cluster - getting a cluster does not
|
||
* allocate any mbufs, and one is needed to assign
|
||
* the cluster to. The mbuf that has a cluster
|
||
* extension can not be used to contain data - only
|
||
* the cluster can contain data.
|
||
*/
|
||
dst = m;
|
||
MGET(m, M_DONTWAIT, MT_DATA);
|
||
if (m == NULL)
|
||
return (0);
|
||
|
||
if (total_len >= MINCLSIZE)
|
||
MCLGET(m, M_DONTWAIT);
|
||
|
||
m->m_len = 0;
|
||
dst->m_next = m;
|
||
amount = min(total_len, M_TRAILINGSPACE(m));
|
||
}
|
||
|
||
src = ze_ring_copy(sc, src, mtod(m, caddr_t) + m->m_len, amount);
|
||
|
||
m->m_len += amount;
|
||
total_len -= amount;
|
||
|
||
}
|
||
return (m);
|
||
}
|
||
#endif
|
||
|