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kolibrios/kernel/branches/Kolibri-A/trunk/network/eth_drv/ethernet.inc
Artem Jerdev (art_zh) 9022bde80a Embedded KOS (AMD/HT version) 
git-svn-id: svn://kolibrios.org@1505 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-06-25 16:47:51 +00:00

510 lines
24 KiB
PHP
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; ETHERNET.INC ;;
;; ;;
;; Ethernet network layer for Menuet OS ;;
;; ;;
;; This file contains the following: ;;
;; PCI bus scanning for valid devices ;;
;; Table of supported ethernet drivers ;;
;; Code to identify and activate a supported driver ;;
;; ARP handler ;;
;; Driver interface to the IP layer ;;
;; Gateway support ;;
;; ;;
;; Individual driver files are included here ;;
;; ;;
;; The PCI bus scanning code was ported from the etherboot ;;
;; 5.0.6 project. The copyright statement for that code is ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;; remaining parts Copyright 2002 Mike Hibbett ;;
;; mikeh@oceanfree.net ;;
;; ;;
;; See file COPYING for details ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
;********************************************************************
; Interface
; ethernet_driver called by stack_handler in stack.inc
; eth_probe called by app_stack_handler in stack.inc
;
;********************************************************************
ETHER_IP equ 0x0008 ; Reversed from 0800 for intel
ETHER_ARP equ 0x0608 ; Reversed from 0806 for intel
ETHER_RARP equ 0x3580
struc ETH_FRAME
{ .DstMAC dp ? ;destination MAC-address [6 bytes]
.SrcMAC dp ? ;source MAC-address [6 bytes]
.Type dw ? ;type of the upper-layer protocol [2 bytes]
.Data db ? ;data [46-1500 bytes]
}
virtual at Ether_buffer
ETH_FRAME ETH_FRAME
end virtual
; Some useful information on data structures
; Ethernet Packet - ARP Request example
;
; 0 1 2 3
; 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
;
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | Dest H/W Address |
; | ( 14 byte header ) |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | | Source H/W Address |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | Protocol - ARP 08 06 |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | H/W Type 00 01 | Protocol Type 08 00 |
; | ( ARP Request packet ) |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | HLen 0x06 | PLen 0x04 | OpCode 00 01 |
; | ( 0001 for request, 0002 for reply ) |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | Source Hardware Address ( MAC Address ) |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | | Source IP Address |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | | Destination Hardware Address |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; | Destination IP Address |
; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
; Include individual drivers source files at this point.
; If you create a new driver, include it below.
include "drivers/rtl8029.inc"
include "drivers/i8255x.inc"
include "drivers/rtl8139.inc"
include "drivers/3c59x.inc"
include "drivers/sis900.inc"
include "drivers/pcnet32.inc"
include "drivers/rtl8169.inc"
include "drivers/forcedeth.inc"
; PCICards
; ========
; PCI vendor and hardware types for hardware supported by the above drivers
; If you add a driver, ensure you update this datastructure, otherwise the
; card will not be probed.
; Each driver is defined by 4 double words. These are
; PCIVendorDevice probeFunction ResetFunction PollFunction transmitFunction
; The last entry must be kept at all zeros, to indicate the end of the list
; As a PCI driver may support more than one hardware implementation, there may
; be several lines which refer to the same functions.
; The first driver found on the PCI bus will be the one used.
PCICARDS_ENTRY_SIZE equ 24 ; Size of each PCICARDS entry
iglobal
PCICards:
dd 0x12098086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
dd 0x10298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
dd 0x12298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
dd 0x10308086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
dd 0x24498086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
dd 0x802910ec, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit, 0
dd 0x813910ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable ; tested by hidnplayr: works ok
dd 0x813810ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x12111113, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable ; tested by hidnplayr: works ok
dd 0x13601500, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x13604033, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x13001186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x13401186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0xab0613d1, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0xa1171259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0xa11e1259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0xab0614ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0xab0714ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x123411db, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x91301432, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x101202ac, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x0106018a, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x1211126c, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x81391743, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x8139021b, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
dd 0x816810ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
dd 0x816910ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
dd 0x011616ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
dd 0x43001186, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
dd 0x816710ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
dd 0x590010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x592010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x597010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x595010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x595110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x595210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x900A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x905010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x905110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x905510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x905810b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x905A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x920010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x980010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x980510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x764610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x505510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x605510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x605610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x5b5710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x505710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x515710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x525710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x656010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x656210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x656410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x450010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
dd 0x09001039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
dd 0x20001022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
dd 0x26251022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
dd 0x20011022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
;dd 0x08031516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
; following cards are untested
dd 0x70161039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
;dd 0x08001516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
;dd 0x08911516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
dd 0x006610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; nVidia Corporation nForce2 Ethernet Controller
dd 0x01c310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x00D610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x008610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x008c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x00e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x00df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x005610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x005710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x003710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x003810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x026810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x026910de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x037210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x037310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x03e510de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x03e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x03ee10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x03ef10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x045010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x045110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x045210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x045310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x054c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x054d10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x054e10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x054f10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x07dc10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x07dd10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x07de10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x07df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x076010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; MCP77 Ethernet Controller
dd 0x076110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x076210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x076310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x0ab010de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x0ab110de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x0ab210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x0ab310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
dd 0x0d7d10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
rb PCICARDS_ENTRY_SIZE ; end of list marker, do not remove
endg
uglobal
;Net-stack's interface's settings
node_addr: db 0,0,0,0,0,0
gateway_ip: dd 0
dns_ip: dd 0
eth_rx_data_len: dw 0
eth_status: dd 0
io_addr: dd 0
hdrtype: db 0
vendor_device: dd 0
pci_data: dd 0
pci_dev: dd 0
pci_bus: dd 0
; These will hold pointers to the selected driver functions
drvr_probe: dd 0
drvr_reset: dd 0
drvr_poll: dd 0
drvr_transmit: dd 0
drvr_cable: dd 0
endg
iglobal
broadcast_add: db 0xff,0xff,0xff,0xff,0xff,0xff
subnet_mask: dd 0x00ffffff ; 255.255.255.0
endg
include "arp.inc" ;arp-protocol functions
include "pci.inc" ;PCI bus access functions
;***************************************************************************
; Function
; eth_tx
;
; Description
; Looks at the NET1OUT_QUEUE for data to send.
; Stores that destination IP in a location used by the tx routine
; Looks up the MAC address in the ARP table; stores that where
; the tx routine can get it
; Get the length of the data. Store that where the tx routine wants it
; Call tx
; Places buffer on empty queue when the tx routine finished
;
;***************************************************************************
proc eth_tx stdcall uses ebx esi edi
local MACAddress dp ? ;allocate 6 bytes in the stack
; Look for a buffer to tx
mov eax, NET1OUT_QUEUE
call dequeue
cmp ax, NO_BUFFER
je .exit ; Exit if no buffer available
push eax ;save buffer number
; convert buffer pointer eax to the absolute address
imul eax, IPBUFFSIZE
add eax, IPbuffs
; Extract the destination IP
; find the destination IP in the ARP table, get MAC
; store this MAC in 'MACAddress'
mov ebx, eax ; Save buffer address
mov edx, [ebx + 16] ; get destination address
; If the destination address is 255.255.255.255,
; set the MACAddress to all ones ( broadcast )
cld
mov esi, broadcast_add
lea edi, [MACAddress]
movsd
movsw
cmp edx, 0xffffffff
je .send ; If it is broadcast, just send
lea eax, [MACAddress] ;cause this is local variable
stdcall arp_table_manager, ARP_TABLE_IP_TO_MAC, edx, eax ;opcode,IP,MAC_ptr - Get the MAC address.
cmp eax, ARP_VALID_MAPPING
je .send
; No valid entry. Has the request been sent, but timed out?
cmp eax, ARP_RESPONSE_TIMEOUT
je .freebuf
.wait_response: ;we wait arp-response
; Re-queue the packet, and exit
pop ebx
mov eax, NET1OUT_QUEUE
call queue ; Get the buffer back
jmp .exit
.send: ;if ARP_VALID_MAPPING then send the packet
lea edi, [MACAddress] ; Pointer to 48 bit destination address
movzx ecx, word[ebx+2] ; Size of IP packet to send
xchg ch, cl ; because mirror byte-order
mov esi, ebx ; Pointer to packet data
mov bx, ETHER_IP ; Type of packet
push ebp
call dword [drvr_transmit] ; Call the drivers transmit function
pop ebp
; OK, we have sent a packet, so increment the count
inc dword [ip_tx_count]
; And finally, return the buffer to the free queue
.freebuf:
pop eax
call freeBuff
.exit:
ret
endp
;***************************************************************************
; Function
; ether_IP_handler
;
; Description
; Called when an IP ethernet packet is received on the ethernet
; Header + Data is in Ether_buffer[]
; We just need to get a buffer from the 'free' queue, and
; store the packet in it, then insert the packet number into the
; IPRX queue.
; If no queue entry is available, the packet is silently discarded
; All registers may be destroyed
;
;***************************************************************************
;uglobal
; ether_IP_handler_cnt dd ?
;endg
ether_IP_handler:
mov eax, EMPTY_QUEUE
call dequeue
cmp ax, NO_BUFFER
je eiph00x
; convert buffer pointer eax to the absolute address
push eax
mov ecx, IPBUFFSIZE
mul ecx
add eax, IPbuffs
mov edi, eax
; get a pointer to the start of the DATA
mov esi, ETH_FRAME.Data
; Now store it all away
mov ecx, IPBUFFSIZE / 4 ; Copy all of the available
; data across - worse case
cld
rep movsd
; inc [ether_IP_handler_cnt]
; DEBUGF 1, "K : ether_IP_handler (%u)\n", [ether_IP_handler_cnt]
; And finally, place the buffer in the IPRX queue
pop ebx
mov eax, IPIN_QUEUE
call queue
eiph00x:
ret
;***************************************************************************
; Function
; eth_probe
; Description
; Searches for an ethernet card. If found, the card is enabled and
; the ethernet -> IP link established
;
; This function scans the PCI bus looking for a supported device.
; ISA bus is currently not supported.
;
; eax is 0 if no hardware found
;***************************************************************************
eth_probe:
; Find a card on the PCI bus, and get it's address
call scan_bus ; Find the ethernet cards PIC address
xor eax, eax
cmp [io_addr], eax
je ep_00x ; Return 0 in eax if no cards found
call dword [drvr_probe] ; Call the drivers probe function
mov eax, [io_addr] ; return a non zero value
ep_00x:
ret
;***************************************************************************
; Function
; ethernet_driver
;
; Description
; The ethernet RX and TX handler
; This is a kernel function, called by stack_handler
;
;***************************************************************************
ethernet_driver:
; Do nothing if the driver is inactive
cmp [ethernet_active], byte 0
je eth_exit
call eth_rx
call eth_tx
eth_exit:
ret
;***************************************************************************
; Function
; eth_rx
;
; Description
; Polls the ethernet card for received data. Extracts if present
; Depending on the Protocol within the packet:
; ARP : Pass to ARP_handler. This may result in an ARP reply
; being tx'ed
; IP : Store in an IP buffer
;
;***************************************************************************
eth_rx:
xor ax, ax
mov [eth_rx_data_len], ax
call dword [drvr_poll] ; Call the drivers poll function
mov ax, [eth_rx_data_len]
cmp ax, 0
je .exit
; Check the protocol. Call appropriate handler
mov ax, [ETH_FRAME.Type] ; The address of the protocol word
cmp ax, ETHER_IP
je .is_ip ; It's IP
cmp ax, ETHER_ARP
je .is_arp ; It is ARP
DEBUGF 1,"K : eth_rx - dumped (%u)\n", ax
inc [dumped_rx_count]
jmp .exit ; If not IP or ARP, ignore
.is_ip:
; DEBUGF 1,"K : eth_rx - IP packet\n"
inc dword [ip_rx_count]
call ether_IP_handler
jmp .exit
.is_arp:
; DEBUGF 1,"K : eth_rx - ARP packet\n"
; At this point, the packet is still in the Ether_buffer
call arp_handler
.exit:
ret
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