;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;; i8254x driver for KolibriOS ;; ;; ;; ;; based on i8254x.asm from baremetal os ;; ;; ;; ;; Written by hidnplayr (hidnplayr@gmail.com) ;; ;; ;; ;; GNU GENERAL PUBLIC LICENSE ;; ;; Version 2, June 1991 ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; TODO: make better use of the available descriptors format MS COFF API_VERSION = 0x01000100 DRIVER_VERSION = 5 MAX_DEVICES = 16 DEBUG = 1 __DEBUG__ = 1 __DEBUG_LEVEL__ = 1 MAX_PKT_SIZE = 16384 ; Maximum packet size include 'proc32.inc' include 'imports.inc' include 'fdo.inc' include '../struct.inc' include 'netdrv.inc' public START public service_proc public version ; Register list REG_CTRL = 0x0000 ; Control Register REG_STATUS = 0x0008 ; Device Status Register REG_CTRLEXT = 0x0018 ; Extended Control Register REG_MDIC = 0x0020 ; MDI Control Register REG_FCAL = 0x0028 ; Flow Control Address Low REG_FCAH = 0x002C ; Flow Control Address High REG_FCT = 0x0030 ; Flow Control Type REG_VET = 0x0038 ; VLAN Ether Type REG_ICR = 0x00C0 ; Interrupt Cause Read REG_ITR = 0x00C4 ; Interrupt Throttling Register REG_ICS = 0x00C8 ; Interrupt Cause Set Register REG_IMS = 0x00D0 ; Interrupt Mask Set/Read Register REG_IMC = 0x00D8 ; Interrupt Mask Clear Register REG_RCTL = 0x0100 ; Receive Control Register REG_FCTTV = 0x0170 ; Flow Control Transmit Timer Value REG_TXCW = 0x0178 ; Transmit Configuration Word REG_RXCW = 0x0180 ; Receive Configuration Word REG_TCTL = 0x0400 ; Transmit Control Register REG_TIPG = 0x0410 ; Transmit Inter Packet Gap REG_LEDCTL = 0x0E00 ; LED Control REG_PBA = 0x1000 ; Packet Buffer Allocation REG_RDBAL = 0x2800 ; RX Descriptor Base Address Low REG_RDBAH = 0x2804 ; RX Descriptor Base Address High REG_RDLEN = 0x2808 ; RX Descriptor Length REG_RDH = 0x2810 ; RX Descriptor Head REG_RDT = 0x2818 ; RX Descriptor Tail REG_RDTR = 0x2820 ; RX Delay Timer Register REG_RXDCTL = 0x3828 ; RX Descriptor Control REG_RADV = 0x282C ; RX Int. Absolute Delay Timer REG_RSRPD = 0x2C00 ; RX Small Packet Detect Interrupt REG_TXDMAC = 0x3000 ; TX DMA Control REG_TDBAL = 0x3800 ; TX Descriptor Base Address Low REG_TDBAH = 0x3804 ; TX Descriptor Base Address High REG_TDLEN = 0x3808 ; TX Descriptor Length REG_TDH = 0x3810 ; TX Descriptor Head REG_TDT = 0x3818 ; TX Descriptor Tail REG_TIDV = 0x3820 ; TX Interrupt Delay Value REG_TXDCTL = 0x3828 ; TX Descriptor Control REG_TADV = 0x382C ; TX Absolute Interrupt Delay Value REG_TSPMT = 0x3830 ; TCP Segmentation Pad & Min Threshold REG_RXCSUM = 0x5000 ; RX Checksum Control ; Register list for i8254x I82542_REG_RDTR = 0x0108 ; RX Delay Timer Register I82542_REG_RDBAL = 0x0110 ; RX Descriptor Base Address Low I82542_REG_RDBAH = 0x0114 ; RX Descriptor Base Address High I82542_REG_RDLEN = 0x0118 ; RX Descriptor Length I82542_REG_RDH = 0x0120 ; RDH for i82542 I82542_REG_RDT = 0x0128 ; RDT for i82542 I82542_REG_TDBAL = 0x0420 ; TX Descriptor Base Address Low I82542_REG_TDBAH = 0x0424 ; TX Descriptor Base Address Low I82542_REG_TDLEN = 0x0428 ; TX Descriptor Length I82542_REG_TDH = 0x0430 ; TDH for i82542 I82542_REG_TDT = 0x0438 ; TDT for i82542 ; CTRL - Control Register (0x0000) CTRL_FD = 0x00000001 ; Full Duplex CTRL_LRST = 0x00000008 ; Link Reset CTRL_ASDE = 0x00000020 ; Auto-speed detection CTRL_SLU = 0x00000040 ; Set Link Up CTRL_ILOS = 0x00000080 ; Invert Loss of Signal CTRL_SPEED_MASK = 0x00000300 ; Speed selection CTRL_SPEED_SHIFT = 8 CTRL_FRCSPD = 0x00000800 ; Force Speed CTRL_FRCDPLX = 0x00001000 ; Force Duplex CTRL_SDP0_DATA = 0x00040000 ; SDP0 data CTRL_SDP1_DATA = 0x00080000 ; SDP1 data CTRL_SDP0_IODIR = 0x00400000 ; SDP0 direction CTRL_SDP1_IODIR = 0x00800000 ; SDP1 direction CTRL_RST = 0x04000000 ; Device Reset CTRL_RFCE = 0x08000000 ; RX Flow Ctrl Enable CTRL_TFCE = 0x10000000 ; TX Flow Ctrl Enable CTRL_VME = 0x40000000 ; VLAN Mode Enable CTRL_PHY_RST = 0x80000000 ; PHY reset ; STATUS - Device Status Register (0x0008) STATUS_FD = 0x00000001 ; Full Duplex STATUS_LU = 0x00000002 ; Link Up STATUS_TXOFF = 0x00000010 ; Transmit paused STATUS_TBIMODE = 0x00000020 ; TBI Mode STATUS_SPEED_MASK = 0x000000C0 ; Link Speed setting STATUS_SPEED_SHIFT = 6 STATUS_ASDV_MASK = 0x00000300 ; Auto Speed Detection STATUS_ASDV_SHIFT = 8 STATUS_PCI66 = 0x00000800 ; PCI bus speed STATUS_BUS64 = 0x00001000 ; PCI bus width STATUS_PCIX_MODE = 0x00002000 ; PCI-X mode STATUS_PCIXSPD_MASK = 0x0000C000 ; PCI-X speed STATUS_PCIXSPD_SHIFT = 14 ; CTRL_EXT - Extended Device Control Register (0x0018) CTRLEXT_PHY_INT = 0x00000020 ; PHY interrupt CTRLEXT_SDP6_DATA = 0x00000040 ; SDP6 data CTRLEXT_SDP7_DATA = 0x00000080 ; SDP7 data CTRLEXT_SDP6_IODIR = 0x00000400 ; SDP6 direction CTRLEXT_SDP7_IODIR = 0x00000800 ; SDP7 direction CTRLEXT_ASDCHK = 0x00001000 ; Auto-Speed Detect Chk CTRLEXT_EE_RST = 0x00002000 ; EEPROM reset CTRLEXT_SPD_BYPS = 0x00008000 ; Speed Select Bypass CTRLEXT_RO_DIS = 0x00020000 ; Relaxed Ordering Dis. CTRLEXT_LNKMOD_MASK = 0x00C00000 ; Link Mode CTRLEXT_LNKMOD_SHIFT = 22 ; MDIC - MDI Control Register (0x0020) MDIC_DATA_MASK = 0x0000FFFF ; Data MDIC_REG_MASK = 0x001F0000 ; PHY Register MDIC_REG_SHIFT = 16 MDIC_PHY_MASK = 0x03E00000 ; PHY Address MDIC_PHY_SHIFT = 21 MDIC_OP_MASK = 0x0C000000 ; Opcode MDIC_OP_SHIFT = 26 MDIC_R = 0x10000000 ; Ready MDIC_I = 0x20000000 ; Interrupt Enable MDIC_E = 0x40000000 ; Error ; ICR - Interrupt Cause Read (0x00c0) ICR_TXDW = 0x00000001 ; TX Desc Written back ICR_TXQE = 0x00000002 ; TX Queue Empty ICR_LSC = 0x00000004 ; Link Status Change ICR_RXSEQ = 0x00000008 ; RX S= ence Error ICR_RXDMT0 = 0x00000010 ; RX Desc min threshold reached ICR_RXO = 0x00000040 ; RX Overrun ICR_RXT0 = 0x00000080 ; RX Timer Interrupt ICR_MDAC = 0x00000200 ; MDIO Access Complete ICR_RXCFG = 0x00000400 ICR_PHY_INT = 0x00001000 ; PHY Interrupt ICR_GPI_SDP6 = 0x00002000 ; GPI on SDP6 ICR_GPI_SDP7 = 0x00004000 ; GPI on SDP7 ICR_TXD_LOW = 0x00008000 ; TX Desc low threshold hit ICR_SRPD = 0x00010000 ; Small RX packet detected ; RCTL - Receive Control Register (0x0100) RCTL_EN = 0x00000002 ; Receiver Enable RCTL_SBP = 0x00000004 ; Store Bad Packets RCTL_UPE = 0x00000008 ; Unicast Promiscuous Enabled RCTL_MPE = 0x00000010 ; Xcast Promiscuous Enabled RCTL_LPE = 0x00000020 ; Long Packet Reception Enable RCTL_LBM_MASK = 0x000000C0 ; Loopback Mode RCTL_LBM_SHIFT = 6 RCTL_RDMTS_MASK = 0x00000300 ; RX Desc Min Threshold Size RCTL_RDMTS_SHIFT = 8 RCTL_MO_MASK = 0x00003000 ; Multicast Offset RCTL_MO_SHIFT = 12 RCTL_BAM = 0x00008000 ; Broadcast Accept Mode RCTL_BSIZE_MASK = 0x00030000 ; RX Buffer Size RCTL_BSIZE_SHIFT = 16 RCTL_VFE = 0x00040000 ; VLAN Filter Enable RCTL_CFIEN = 0x00080000 ; CFI Enable RCTL_CFI = 0x00100000 ; Canonical Form Indicator Bit RCTL_DPF = 0x00400000 ; Discard Pause Frames RCTL_PMCF = 0x00800000 ; Pass MAC Control Frames RCTL_BSEX = 0x02000000 ; Buffer Size Extension RCTL_SECRC = 0x04000000 ; Strip Ethernet CRC ; TCTL - Transmit Control Register (0x0400) TCTL_EN = 0x00000002 ; Transmit Enable TCTL_PSP = 0x00000008 ; Pad short packets TCTL_SWXOFF = 0x00400000 ; Software XOFF Transmission ; PBA - Packet Buffer Allocation (0x1000) PBA_RXA_MASK = 0x0000FFFF ; RX Packet Buffer PBA_RXA_SHIFT = 0 PBA_TXA_MASK = 0xFFFF0000 ; TX Packet Buffer PBA_TXA_SHIFT = 16 ; Flow Control Type FCT_TYPE_DEFAULT = 0x8808 ; === TX Descriptor fields === ; TX Packet Length (word 2) TXDESC_LEN_MASK = 0x0000ffff ; TX Descriptor CMD field (word 2) TXDESC_IDE = 0x80000000 ; Interrupt Delay Enable TXDESC_VLE = 0x40000000 ; VLAN Packet Enable TXDESC_DEXT = 0x20000000 ; Extension TXDESC_RPS = 0x10000000 ; Report Packet Sent TXDESC_RS = 0x08000000 ; Report Status TXDESC_IC = 0x04000000 ; Insert Checksum TXDESC_IFCS = 0x02000000 ; Insert FCS TXDESC_EOP = 0x01000000 ; End Of Packet ; TX Descriptor STA field (word 3) TXDESC_TU = 0x00000008 ; Transmit Underrun TXDESC_LC = 0x00000004 ; Late Collision TXDESC_EC = 0x00000002 ; Excess Collisions TXDESC_DD = 0x00000001 ; Descriptor Done ; === RX Descriptor fields === ; RX Packet Length (word 2) RXDESC_LEN_MASK = 0x0000ffff ; RX Descriptor STA field (word 3) RXDESC_PIF = 0x00000080 ; Passed In-exact Filter RXDESC_IPCS = 0x00000040 ; IP cksum calculated RXDESC_TCPCS = 0x00000020 ; TCP cksum calculated RXDESC_VP = 0x00000008 ; Packet is 802.1Q RXDESC_IXSM = 0x00000004 ; Ignore cksum indication RXDESC_EOP = 0x00000002 ; End Of Packet RXDESC_DD = 0x00000001 ; Descriptor Done virtual at ebx device: ETH_DEVICE .mmio_addr dd ? .pci_bus dd ? .pci_dev dd ? .irq_line db ? .cur_tx dd ? .last_tx dd ? rb 0x100 - (($ - device) and 0xff) .rx_desc rd 256/8 rb 0x100 - (($ - device) and 0xff) .tx_desc rd 256/8 sizeof.device_struct = $ - device end virtual section '.flat' code readable align 16 ;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; proc START ;; ;; ;; ;; (standard driver proc) ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;; align 4 proc START stdcall, state:dword cmp [state], 1 jne .exit .entry: DEBUGF 2,"Loading %s driver\n", my_service stdcall RegService, my_service, service_proc ret .fail: .exit: xor eax, eax ret endp ;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; proc SERVICE_PROC ;; ;; ;; ;; (standard driver proc) ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;; align 4 proc service_proc stdcall, ioctl:dword mov edx, [ioctl] mov eax, [IOCTL.io_code] ;------------------------------------------------------ cmp eax, 0 ;SRV_GETVERSION jne @F cmp [IOCTL.out_size], 4 jl .fail mov eax, [IOCTL.output] mov [eax], dword API_VERSION xor eax, eax ret ;------------------------------------------------------ @@: cmp eax, 1 ;SRV_HOOK jne .fail cmp [IOCTL.inp_size], 3 ; Data input must be at least 3 bytes jl .fail mov eax, [IOCTL.input] cmp byte [eax], 1 ; 1 means device number and bus number (pci) are given jne .fail ; other types arent supported for this card yet ; check if the device is already listed mov esi, device_list mov ecx, [devices] test ecx, ecx jz .firstdevice ; mov eax, [IOCTL.input] ; get the pci bus and device numbers mov ax , [eax+1] ; .nextdevice: mov ebx, [esi] cmp ax , word [device.pci_bus] ; compare with pci and device num in device list (notice the usage of word instead of byte) je .find_devicenum ; Device is already loaded, let's find it's device number add esi, 4 loop .nextdevice ; This device doesnt have its own eth_device structure yet, lets create one .firstdevice: cmp [devices], MAX_DEVICES ; First check if the driver can handle one more card jge .fail allocate_and_clear ebx, sizeof.device_struct, .fail ; Allocate the buffer for device structure ; Fill in the direct call addresses into the struct mov [device.reset], reset mov [device.transmit], transmit mov [device.get_MAC], read_mac mov [device.set_MAC], .fail mov [device.unload], unload mov [device.name], my_service ; save the pci bus and device numbers mov eax, [IOCTL.input] movzx ecx, byte [eax+1] mov [device.pci_bus], ecx movzx ecx, byte [eax+2] mov [device.pci_dev], ecx ; Now, it's time to find the base mmio addres of the PCI device find_mmio32 [device.pci_bus], [device.pci_dev], [device.mmio_addr] ; Create virtual mapping of the physical memory push 1Bh ; PG_SW+PG_NOCACHE push 10000h ; size of the map push eax call MapIoMem mov [device.mmio_addr], eax ; We've found the mmio address, find IRQ now find_irq byte [device.pci_bus], byte [device.pci_dev], [device.irq_line] DEBUGF 1,"Hooking into device, dev:%x, bus:%x, irq:%x, addr:%x\n",\ [device.pci_dev]:1,[device.pci_bus]:1,[device.irq_line]:1,[device.mmio_addr]:8 ; Ok, the eth_device structure is ready, let's probe the device call probe ; this function will output in eax test eax, eax jnz .err ; If an error occured, exit mov eax, [devices] ; Add the device structure to our device list mov [device_list+4*eax], ebx ; (IRQ handler uses this list to find device) inc [devices] ; call start_i8254x mov [device.type], NET_TYPE_ETH call NetRegDev cmp eax, -1 je .destroy ret ; If the device was already loaded, find the device number and return it in eax .find_devicenum: DEBUGF 1,"Trying to find device number of already registered device\n" call NetPtrToNum ; This kernel procedure converts a pointer to device struct in ebx ; into a device number in edi mov eax, edi ; Application wants it in eax instead DEBUGF 1,"Kernel says: %u\n", eax ret ; If an error occured, remove all allocated data and exit (returning -1 in eax) .destroy: ; todo: reset device into virgin state .err: stdcall KernelFree, ebx .fail: or eax, -1 ret ;------------------------------------------------------ endp ;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;; ;; ;; ;; Actual Hardware dependent code starts here ;; ;; ;; ;;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\;; align 4 unload: ; TODO: (in this particular order) ; ; - Stop the device ; - Detach int handler ; - Remove device from local list (device_list) ; - call unregister function in kernel ; - Remove all allocated structures and buffers the card used or eax, -1 ret ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; probe: enables the device (if it really is I8254X) ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; align 4 probe: DEBUGF 1,"Probe\n" make_bus_master byte [device.pci_bus], byte [device.pci_dev] ; TODO: validate the device call read_mac movzx eax, [device.irq_line] DEBUGF 1,"Attaching int handler to irq %x\n", eax:1 stdcall AttachIntHandler, eax, int_handler, dword 0 test eax, eax jnz @f DEBUGF 1,"\nCould not attach int handler!\n" ; or eax, -1 ; ret @@: reset_dontstart: DEBUGF 1,"Reset\n" mov esi, [device.mmio_addr] mov dword [esi + REG_IMC], 0xffffffff ; Disable all interrupt causes mov eax, dword [esi + REG_ICR] ; Clear any pending interrupts mov dword [esi + REG_ITR], 0 ; Disable interrupt throttling logic mov dword [esi + REG_PBA], 0x00000030 ; PBA: set the RX buffer size to 48KB (TX buffer is calculated as 64-RX buffer) mov dword [esi + REG_RDTR], 0 ; RDTR: set no delay mov dword [esi + REG_TXCW], 0x08008060 ; TXCW: set ANE, TxConfigWord (Half/Full duplex, Next Page Reqest) mov eax, [esi + REG_CTRL] or eax, 1 shl 6 + 1 shl 5 and eax, not (1 shl 3 + 1 shl 7 + 1 shl 30 + 1 shl 31) mov dword [esi + REG_CTRL], eax ; CTRL: clear LRST, set SLU and ASDE, clear RSTPHY, VME, and ILOS lea edi, [esi + 0x5200] ; MTA: reset mov eax, 0xffffffff stosd stosd stosd stosd stdcall KernelAlloc, 48*1024 mov dword [device.rx_desc + 16], eax GetRealAddr mov dword [device.rx_desc], eax mov dword [device.rx_desc + 4], 0 lea eax, [device.rx_desc] GetRealAddr mov dword [esi + REG_RDBAL], eax ; Receive Descriptor Base Address Low mov dword [esi + REG_RDBAH], 0 ; Receive Descriptor Base Address High mov dword [esi + REG_RDLEN], (1 * 128) ; Receive Descriptor Length mov dword [esi + REG_RDH], 0 ; Receive Descriptor Head mov dword [esi + REG_RDT], 1 ; Receive Descriptor Tail mov dword [esi + REG_RCTL], 0x04008006 ; Receiver Enable, Store Bad Packets, Broadcast Accept Mode, Strip Ethernet CRC from incoming packet mov dword [device.tx_desc], 0 mov dword [device.tx_desc + 4], 0 mov dword [device.tx_desc + 16], 0 lea eax, [device.tx_desc] GetRealAddr mov dword [esi + REG_TDBAL], eax ; Transmit Descriptor Base Address Low mov dword [esi + REG_TDBAH], 0 ; Transmit Descriptor Base Address High mov dword [esi + REG_TDLEN], (1 * 128) ; Transmit Descriptor Length mov dword [esi + REG_TDH], 0 ; Transmit Descriptor Head mov dword [esi + REG_TDT], 0 ; Transmit Descriptor Tail mov dword [esi + REG_TCTL], 0x010400fa ; Enabled, Pad Short Packets, 15 retrys, 64-byte COLD, Re-transmit on Late Collision mov dword [esi + REG_TIPG], 0x0060200A ; IPGT 10, IPGR1 8, IPGR2 6 xor eax, eax ret start_i8254x: xor eax, eax mov [esi + REG_RDTR], eax ; Clear the Receive Delay Timer Register mov [esi + REG_RADV], eax ; Clear the Receive Interrupt Absolute Delay Timer mov [esi + REG_RSRPD], eax ; Clear the Receive Small Packet Detect Interrupt or eax, 1 shl 0 + 1 shl 7 ; TXDW + RXT0 mov eax, -1 ;;;; hack! mov [esi + REG_IMS], eax ; Enable interrupt types mov [device.mtu], 1514 xor eax, eax ret align 4 reset: call reset_dontstart call start_i8254x ret align 4 read_mac: DEBUGF 1,"Read MAC\n" mov esi, [device.mmio_addr] mov eax, [esi+0x5400] ; RAL test eax, eax jz .try_eeprom mov dword [device.mac], eax mov eax, [esi+0x5404] ; RAH mov word [device.mac+4], ax jmp .mac_ok .try_eeprom: mov dword [esi+0x14], 0x00000001 mov eax, [esi+0x14] shr eax, 16 mov word [device.mac], ax mov dword [esi+0x14], 0x00000101 mov eax, [esi+0x14] shr eax, 16 mov word [device.mac+2], ax mov dword [esi+0x14], 0x00000201 mov eax, [esi+0x14] shr eax, 16 mov word [device.mac+4], ax .mac_ok: DEBUGF 1,"MAC = %x-%x-%x-%x-%x-%x\n",\ [device.mac+0]:2,[device.mac+1]:2,[device.mac+2]:2,[device.mac+3]:2,[device.mac+4]:2,[device.mac+5]:2 ret ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Transmit ;; ;; ;; ;; In: buffer pointer in [esp+4] ;; ;; size of buffer in [esp+8] ;; ;; pointer to device structure in ebx ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; align 4 transmit: DEBUGF 2,"\nTransmitting packet, buffer:%x, size:%u\n", [esp+4], [esp+8] mov eax, [esp+4] DEBUGF 2,"To: %x-%x-%x-%x-%x-%x From: %x-%x-%x-%x-%x-%x Type:%x%x\n",\ [eax+00]:2,[eax+01]:2,[eax+02]:2,[eax+03]:2,[eax+04]:2,[eax+05]:2,\ [eax+06]:2,[eax+07]:2,[eax+08]:2,[eax+09]:2,[eax+10]:2,[eax+11]:2,\ [eax+13]:2,[eax+12]:2 cmp dword [esp + 8], 1514 jg .fail cmp dword [esp + 8], 60 jl .fail ; Program the descriptor (use legacy mode) lea edi, [device.tx_desc] ; Transmit Descriptor Base Address mov dword [edi + 16], eax ; Store the data location (for driver) GetRealAddr ; mov dword [edi], eax ; Real addr (for i8254x) mov dword [edi + 4], 0x00000000 ; mov ecx, [esp + 8] or ecx, 1 shl 24 + 1 shl 25 + 1 shl 27 ; EOP + IFCS + RS mov dword [edi + 8], ecx ; Packet size mov dword [edi + 12], 0x00000000 ; Tell i8254x wich descriptor(s) we programmed mov edi, [device.mmio_addr] mov dword [edi + REG_TDH], 0 ; TDH - Transmit Descriptor Head mov dword [edi + REG_TDT], 1 ; TDT - Transmit Descriptor Tail ; Update stats inc [device.packets_tx] mov eax, [esp + 8] add dword [device.bytes_tx], eax adc dword [device.bytes_tx + 4], 0 ret 8 .fail: DEBUGF 1,"Send failed\n" ret 8 ;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Interrupt handler ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;; align 4 int_handler: DEBUGF 2,"\nIRQ %x\n", eax:2 ; no, you cant replace 'eax:2' with 'al', this must be a bug in FDO ;------------------------------------------- ; Find pointer of device wich made IRQ occur mov esi, device_list mov ecx, [devices] test ecx, ecx jz .fail .nextdevice: mov ebx, dword [esi] mov edi, [device.mmio_addr] test edi, edi jz .nextdevice ;-------------------- ; Get interrupt cause mov eax, [edi + REG_ICR] DEBUGF 2,"interrupt cause=%x\n", eax ;--------- ; RX done? test eax, ICR_RXDMT0 jz .no_rx push eax push .retaddr ; Get last descriptor addr lea esi, [device.rx_desc] cmp byte [esi + 12], 0 ; Check status field je .retaddr movzx ecx, word [esi + 8] ; Get the packet length DEBUGF 2,"got %u bytes\n", ecx push ecx push dword [esi + 16] ; Get packet pointer ; Update stats add dword [device.bytes_rx], ecx adc dword [device.bytes_rx + 4], 0 inc dword [device.packets_rx] ; allocate new descriptor stdcall KernelAlloc, 48*1024 mov dword [esi + 16], eax GetRealAddr mov dword [esi], eax ; reset descriptor status mov esi, [device.mmio_addr] mov dword [esi + REG_RDH], 0x00000000 ; Receive Descriptor Head mov dword [esi + REG_RDT], 0x00000001 ; Receive Descriptor Tail jmp EthReceiver .retaddr: pop eax .no_rx: ;-------------- ; Link Changed? test eax, ICR_LSC jz .no_link DEBUGF 2,"Link Changed\n" .no_link: ;--------------- ; Transmit done? test eax, ICR_TXDW jz .no_tx DEBUGF 2,"Transmit done\n" lea edi, [device.tx_desc] ; Transmit Descriptor Base Address push dword [edi + 16] ; Store the data location (for driver) call KernelFree .no_tx: .fail: ret ; End of code section '.data' data readable writable align 16 align 4 devices dd 0 version dd (DRIVER_VERSION shl 16) or (API_VERSION and 0xFFFF) my_service db 'I8254X',0 ; max 16 chars include zero include_debug_strings ; All data wich FDO uses will be included here device_list rd MAX_DEVICES ; This list contains all pointers to device structures the driver is handling