Subversion Repositories Kolibri OS

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;;                                                                 ;;

;; Copyright (C) KolibriOS team 2004-2009. All rights reserved.    ;;

;; Distributed under terms of the GNU General Public License       ;;

;;                                                                 ;;

;;  ETHERNET.INC                                                   ;;

;;                                                                 ;;

;;  Ethernet network layer for KolibriOS                           ;;

;;                                                                 ;;

;;    Written by hidnplayr@kolibrios.org                           ;;

;;                                                                 ;;

;;          GNU GENERAL PUBLIC LICENSE                             ;;

;;             Version 2, June 1991                                ;;

;;                                                                 ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision: 1249 $

MAX_ETH_DEVICES 	equ MAX_NET_DEVICES

ETH_QUEUE_SIZE		equ 16

struct	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:		       ; data [46-1500 bytes]

ends

struct	ETH_DEVICE

	.unload 	dd ?

	.reset		dd ?

	.transmit	dd ?

	.set_MAC	dd ?

	.get_MAC	dd ?

	.set_mode	dd ?

	.get_mode	dd ?

	.bytes_tx	dq ?

	.bytes_rx	dq ?

	.packets_tx	dd ?

	.packets_rx	dd ?

	.mode		dd ?  ; This dword contains cable status (10mbit/100mbit, full/half duplex, auto negotiation or not,..)

	.name		dd ?

	.mac		dp ?

ends			      ; the rest of the device struct depends on the type of device

align 4

iglobal

	ETH_BROADCAST	dp  0xffffffffffff

endg

align 4

uglobal

	ETH_RUNNING	dd  ?

	ETH_DRV_LIST	rd  MAX_ETH_DEVICES

	ETH_IN_QUEUE	rd  3*ETH_QUEUE_SIZE+3

	ETH_OUT_QUEUE	rd  3*ETH_QUEUE_SIZE+3

endg

;-----------------------------------------------

;

; ETH_init

;

;  This function resets all ethernet variables

;

;  IN:  /

;  OUT: /

;

;-----------------------------------------------

align 4

ETH_init:

	xor	eax, eax

	mov	edi, ETH_RUNNING

	mov	ecx, (1+MAX_ETH_DEVICES)

	rep	stosd

	init_queue ETH_IN_QUEUE

	init_queue ETH_OUT_QUEUE

	ret

;---------------------------------------------------------

;

; ETH_Add_Device:

;

;  This function is called by ethernet drivers,

;  to register each running ethernet device to the kernel

;

;  IN:  Pointer to device structure in ebx

;  OUT: Device num in eax, -1 on error

;

;---------------------------------------------------------

align 4

ETH_add_device:

	DEBUGF	1,"ETH_Add_Device: %x ", ebx

	mov	eax, [ETH_RUNNING]

	cmp	eax, MAX_ETH_DEVICES

	jge	.error

	test	eax, eax

	jnz	.notfirst

	mov	dword [ETH_IN_QUEUE], eax

	mov	dword [ETH_OUT_QUEUE], eax

      .notfirst:

	mov	eax, ebx

	mov	ecx, MAX_ETH_DEVICES	  ; We need to check whole list because a device may be removed without re-organizing list

	mov	edi, ETH_DRV_LIST

	repne	scasd			  ; See if device is already in the list

	jz	.error

	xor	eax, eax

	mov	ecx, MAX_ETH_DEVICES

	mov	edi, ETH_DRV_LIST

	repne	scasd			  ; Find empty spot in the list

	jnz	.error

	sub	edi, 4

	mov	[edi], ebx		  ; add device to list

	sub	edi, ETH_DRV_LIST	  ; edi = 4*device num       Calculate device number in eax

	mov	eax, edi		  ; edx = 4*device num

	shr	eax, 2

	inc	[ETH_RUNNING]		  ; Indicate that one more ethernet device is up and running

	DEBUGF	1,"- succes: %u\n",eax

	ret

       .error:

	or	eax, -1

	DEBUGF	1,"- fail\n"

	ret

;--------------------------------

;

; ETH_Remove_Device:

;

;  This function is called by ethernet drivers,

;  to unregister ethernet devices from the kernel

;

;  IN:  Pointer to device structure in ebx

;  OUT: eax: -1 on error

;

;--------------------------------

align 4

ETH_remove_device:

	cmp	[ETH_RUNNING], 0

	je	.error

	mov	eax, ebx

	mov	ecx, MAX_ETH_DEVICES

	mov	edi, ETH_DRV_LIST

	repne	scasd

	jnz	.error

	xor	eax, eax

	mov	dword [edi-4], eax

	dec	[ETH_RUNNING]

	jnz	.notlast

	mov	dword [ETH_IN_QUEUE], ETH_QUEUE_SIZE

	mov	dword [ETH_OUT_QUEUE], ETH_QUEUE_SIZE

       .notlast:

	ret

       .error:

	or	eax, -1

	ret

;-------------------------------------------------------------

;

; ETH_Receiver:

;

;  This function is called by ethernet drivers,

;  It pushes the received ethernet packets onto the eth_in_queue

;

;  IN:  Pointer to buffer in [esp], size of buffer in [esp-4], pointer to eth_device in ebx

;  OUT: /

;

;-------------------------------------------------------------

align 4

ETH_receiver:

	DEBUGF	1,"ETH_Receiver: "

	push	ebx

	mov	esi, esp

	add_to_queue ETH_IN_QUEUE, ETH_QUEUE_SIZE, eth_queue_entry.size, .fail

	DEBUGF	1,"Queued packet successfully\n"

	add	esp, 4*3

	ret

  .fail:

	DEBUGF	1,"ETH_IN_QUEUE is full!\n"

	add	esp, 4

	call	kernel_free

	add	esp, 4

	ret

;-------------------------------------------------------------

;

; ETH_Handler:

;

;  Handles all queued eth packets (called from kernel's main_loop)

;

;  IN:  /

;  OUT: /

;

;-------------------------------------------------------------

align 4

ETH_handler:

	get_from_queue ETH_IN_QUEUE, ETH_QUEUE_SIZE, eth_queue_entry.size, .gohome

	push	ETH_handler

	lodsd

	mov	ebx, eax

	lodsd

	mov	ecx, eax

	lodsd

	xchg	eax, ecx

	push	ecx

	push	eax

	DEBUGF	1,"ETH_Handler - size: %u\n", ecx

	cmp	ecx, 60    ; check packet length

	jl	.dump

	sub	ecx, ETH_FRAME.Data

	lea	edx, [eax + ETH_FRAME.Data]

	mov	ax , [eax + ETH_FRAME.Type]

	cmp	ax, ETHER_IPv4

	je	IPv4_handler

	cmp	ax, ETHER_ARP

	je	ARP_handler

	DEBUGF	1,"Unknown ethernet packet type %x\n", ax

  .dump:

	DEBUGF	1,"Dumping packet\n"

	call	kernel_free

	add	esp, 4

  .gohome:

	ret				; return to get more from queue / to caller

;-----------------------------------------------------------------

;

; ETH_sender:

;

;  This function sends an ethernet packet to the correct driver.

;

;  IN:  Pointer to buffer in [esp]

;       size of buffer in [esp+4]

;       pointer to device struct in ebx

;  OUT: /

;

;-----------------------------------------------------------------

align 4

ETH_sender:

	DEBUGF	1,"ETH_Sender: queuing for device: %x, %u bytes\n", [esp], [esp + 4]

	push	ebx

	mov	esi, esp

	add_to_queue ETH_OUT_QUEUE, ETH_QUEUE_SIZE, eth_queue_entry.size, .fail

	DEBUGF	1,"Queued packet successfully\n"

	add	esp, 3*4

	ret

  .fail:

	DEBUGF	1,"ETH_OUT_QUEUE is full!\n"

	add	esp, 4

	call	kernel_free

	add	esp, 4

	ret

;-----------------------------------------------------------------

;

; ETH_send_queued:

;

;  IN:  /

;  OUT: /

;

;-----------------------------------------------------------------

align 4

ETH_send_queued:

	get_from_queue ETH_OUT_QUEUE, ETH_QUEUE_SIZE, eth_queue_entry.size, .gohome

	push	ETH_send_queued

	lodsd

	mov	ebx, eax

	sub	esp, 8

	mov	edi, esp

	movsd

	movsd

	DEBUGF	1,"dequeued packet for device %x\n", ebx

	call	ETH_struc2dev			; convert struct ptr to device num (this way we know if driver is still mounted)

	cmp	edi, -1

	je	.fail

	jmp	[ebx+ETH_DEVICE.transmit]	; we will return to get_from_queue macro after transmitting packet

     .fail:

	call	kernel_free

	add	esp, 4 ; pop (balance stack)

	DEBUGF 1,"ETH_Sender - fail\n"

     .gohome:

	ret

;---------------------------------------------------------------------------

;

; ETH_struc2dev

;

; IN: pointer to device struct in ebx

;

; OUT: edi is -1 on error, device number otherwise

;

;---------------------------------------------------------------------------

align 4

ETH_struc2dev:

	push	eax ecx

	mov	eax, ebx

	mov	ecx, MAX_ETH_DEVICES

	mov	edi, ETH_DRV_LIST

	repne	scasd

	jnz	.error

	sub	edi, ETH_DRV_LIST+4

	shr	edi, 2

	pop	ecx eax

	ret

  .error:

	or	edi, -1

	pop	ecx eax

	ret

;---------------------------------------------------------------------------

;

; ETH_create_Packet

;

; IN: pointer to source mac in eax

;     pointer to destination mac in ebx

;     packet size in ecx

;     device number in edx

;     protocol in di

;

; OUT: edi is -1 on error, pointer to buffer otherwise

;      eax points to buffer start

;      ebx is pointer to device structure

;      ecx is unchanged (packet size of embedded data)

;      edx is size of complete buffer

;      esi points to procedure wich needs to be called to send packet

;

;---------------------------------------------------------------------------

align 4

ETH_create_packet:

	DEBUGF 1,"Creating Ethernet Packet (size=%u): \n", ecx

	cmp	ecx, 1500

	jg	.exit

	push	ecx di eax ebx edx

	add	ecx, ETH_FRAME.Data

	push	ecx

	push	ecx

	call	kernel_alloc

	test	eax, eax

	jz	.pop_exit

	pop	ecx

	pop	edx

	mov	edi, eax

	pop	esi

	movsd

	movsw

	pop	esi

	movsd

	movsw

	pop	ax

	stosw

	lea	eax, [edi - ETH_FRAME.Data]  ; Set eax to buffer start

	mov	edx, ecx		     ; Set ebx to complete buffer size

	pop	ecx

	mov	esi, ETH_sender

	xor	ebx, ebx			;;;; TODO: Fixme

	mov	ebx, [ETH_DRV_LIST + ebx]

	cmp	edx, 46 + ETH_FRAME.Data    ; If data size is less then 46, add padding bytes

	jg	.continue

	mov	edx, 46 + ETH_FRAME.Data

       .continue:

	DEBUGF 1,"done: %x size:%u device:%x\n", eax, edx, ebx

	ret

  .pop_exit:

	DEBUGF 1,"Out of ram space!!\n"

	add	esp, 18

	or	edi,-1

	ret

  .exit:

	DEBUGF 1,"Packet too large!\n"

	or	edi, -1

	ret

;---------------------------------------------------------------------------

;

; ETH_API

;

; This function is called by system function 75

;

; IN:  subfunction number in bl

;      device number in bh

;      ecx, edx, .. depends on subfunction

;

; OUT:

;

;---------------------------------------------------------------------------

align 4

ETH_API:

	movzx	eax, bh

	shl	eax, 2

	test	bl, bl

	jz	.packets_tx	; 0

	dec	bl

	jz	.packets_rx	; 1

	dec	bl

	jz	.bytes_tx	; 2

	dec	bl

	jz	.bytes_rx	; 3

	dec	bl

	jz	.read_mac	; 4

	dec	bl

	jz	.write_mac	; 5

	dec	bl

	jz	.in_queue	; 6

	dec	bl

	jz	.out_queue	; 7

.error:

	mov	eax, -1

	ret

.packets_tx:

	add	eax, ETH_DRV_LIST

	mov	eax, dword [eax]

	mov	eax, dword [eax + ETH_DEVICE.packets_tx]

	ret

.packets_rx:

	add	eax, ETH_DRV_LIST

	mov	eax, dword [eax]

	mov	eax, dword [eax + ETH_DEVICE.packets_rx]

	ret

.bytes_tx:

	add	eax, ETH_DRV_LIST

	mov	eax, dword [eax]

	mov	ebx, dword [eax + ETH_DEVICE.bytes_tx + 4]

	mov	eax, dword [eax + ETH_DEVICE.bytes_tx]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.bytes_rx:

	add	eax, ETH_DRV_LIST

	mov	eax, dword [eax]

	mov	ebx, dword [eax + ETH_DEVICE.bytes_rx + 4]

	mov	eax, dword [eax + ETH_DEVICE.bytes_rx]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.read_mac:

	add	eax, ETH_DRV_LIST

	mov	eax, [eax]

;        push    eax

;        call    dword [eax + ETH_DEVICE.get_MAC]

;        pop     eax

	movzx	ebx, word [eax + ETH_DEVICE.mac]

	mov	eax, dword [eax + ETH_DEVICE.mac + 2]

	mov	[esp+20+4], ebx 			; TODO: fix this ugly code

	ret

.write_mac:

	push	ecx

	push	dx

	add	eax, ETH_DRV_LIST

	mov	eax, [eax]

	mov	eax, dword [eax + ETH_DEVICE.set_MAC]

	call	eax

	ret

.in_queue:

	add	eax, ETH_IN_QUEUE

	mov	eax, [eax + queue.size]

	ret

.out_queue:

	add	eax, ETH_OUT_QUEUE

	mov	eax, [eax + queue.size]

	ret