kolibrios-gitea/kernel/branches/net/drivers/netdrv.inc

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                                 ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved.    ;;
;; Distributed under terms of the GNU General Public License       ;;
;;                                                                 ;;
;;          GNU GENERAL PUBLIC LICENSE                             ;;
;;             Version 2, June 1991                                ;;
;;                                                                 ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

include 'bus/pci.inc'

; Kernel variables

        PAGESIZE                equ 4096
        PG_SW                   equ 0x003


; network driver types

        NET_TYPE_ETH            equ 1
        NET_TYPE_SLIP           equ 2


        LAST_IO = 0

macro set_io addr {

        if      addr = 0
        mov     edx, [device.io_addr]
        else if addr = LAST_IO
        else
        add     edx, addr - LAST_IO
        end if

        LAST_IO = addr
}

macro allocate_and_clear dest, size, err {

; We need to allocate at least 8 pages, if we want a continuous memory in ram
        push    edx
    if (size < 8*4096) & (size > 4096)
        stdcall KernelAlloc, 8*4096
    else
        stdcall KernelAlloc, size
    end if
        pop     edx

        test    eax, eax
        jz      err
        mov     dest, eax               ; Save the address to it into the device struct
        mov     edi, eax                ; look at last part of code!

; Release the unused pages (if any)
    if (size < 8*4096) & (size > 4096)
        add     eax, (size/4096+1)*4096
        mov     ecx, 8-(size/4096+1)
        push    edx
        call    ReleasePages
        pop     edx
    end if

; Clear the allocated buffer
        mov     ecx, size/4             ; divide by 4 because of DWORD
        xor     eax, eax
        rep     stosd

}

struc IOCTL {
      .handle           dd ?
      .io_code          dd ?
      .input            dd ?
      .inp_size         dd ?
      .output           dd ?
      .out_size         dd ?
}

virtual at edx
  IOCTL IOCTL
end virtual


if used null_op
align 4
null_op:
        or      eax, -1
        ret

end if


macro GetRealAddr {             ; input and output is eax

        push    ax
        call    GetPgAddr
        and     word[esp], PAGESIZE - 1
        or      ax, word[esp]
        inc     esp
        inc     esp

}

macro NET_DEVICE {

        .type           dd ?    ; Type field
        .mtu            dd ?    ; Maximal Transmission Unit
        .name           dd ?    ; Ptr to 0 terminated string

        .unload         dd ?    ; Ptrs to driver functions
        .reset          dd ?    ;
        .transmit       dd ?    ;

        .bytes_tx       dq ?    ; Statistics, updated by the driver
        .bytes_rx       dq ?    ;
        .packets_tx     dd ?    ;
        .packets_rx     dd ?    ;

        .end:
}


macro ETH_DEVICE {
      NET_DEVICE

        .set_mode       dd ?
        .get_mode       dd ?

        .set_MAC        dd ?
        .get_MAC        dd ?

        .mode           dd ?
        .mac            dp ?
                        dp ?    ; qword alignment

}



macro SLIP_DEVICE {
        NET_DEVICE

        .set_mode       dd ?
        .get_mode       dd ?

        .mode           dd ?

}