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opengnsys_ipxe/src/arch/i386/interface/pxe/pxe_undi.c

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/** @file
*
* PXE UNDI API
*
*/
/*
* Copyright (C) 2004 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <byteswap.h>
#include <basemem_packet.h>
#include <gpxe/netdevice.h>
#include <gpxe/iobuf.h>
#include <gpxe/device.h>
#include <gpxe/pci.h>
#include <gpxe/if_ether.h>
#include <gpxe/ip.h>
#include <gpxe/arp.h>
#include <gpxe/rarp.h>
#include "pxe.h"
/**
* Count of outstanding transmitted packets
*
* This is incremented each time PXENV_UNDI_TRANSMIT is called, and
* decremented each time that PXENV_UNDI_ISR is called with the TX
* queue empty, stopping when the count reaches zero. This allows us
* to provide a pessimistic approximation of TX completion events to
* the PXE NBP simply by monitoring the netdev's TX queue.
*/
static int undi_tx_count = 0;
struct net_device *pxe_netdev = NULL;
/**
* Set network device as current PXE network device
*
* @v netdev Network device, or NULL
*/
void pxe_set_netdev ( struct net_device *netdev ) {
if ( pxe_netdev )
netdev_put ( pxe_netdev );
pxe_netdev = NULL;
if ( netdev )
pxe_netdev = netdev_get ( netdev );
}
/**
* Open PXE network device
*
* @ret rc Return status code
*/
static int pxe_netdev_open ( void ) {
int rc;
if ( ( rc = netdev_open ( pxe_netdev ) ) != 0 )
return rc;
netdev_irq ( pxe_netdev, 1 );
return 0;
}
/**
* Close PXE network device
*
*/
static void pxe_netdev_close ( void ) {
netdev_irq ( pxe_netdev, 0 );
netdev_close ( pxe_netdev );
undi_tx_count = 0;
}
/**
* Dump multicast address list
*
* @v mcast PXE multicast address list
*/
static void pxe_dump_mcast_list ( struct s_PXENV_UNDI_MCAST_ADDRESS *mcast ) {
struct ll_protocol *ll_protocol = pxe_netdev->ll_protocol;
unsigned int i;
for ( i = 0 ; i < mcast->MCastAddrCount ; i++ ) {
DBG ( " %s", ll_protocol->ntoa ( mcast->McastAddr[i] ) );
}
}
/* PXENV_UNDI_STARTUP
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_startup ( struct s_PXENV_UNDI_STARTUP *undi_startup ) {
DBG ( "PXENV_UNDI_STARTUP\n" );
undi_startup->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_CLEANUP
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_cleanup ( struct s_PXENV_UNDI_CLEANUP *undi_cleanup ) {
DBG ( "PXENV_UNDI_CLEANUP\n" );
pxe_netdev_close();
undi_cleanup->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_INITIALIZE
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_initialize ( struct s_PXENV_UNDI_INITIALIZE
*undi_initialize ) {
DBG ( "PXENV_UNDI_INITIALIZE protocolini %08x\n",
undi_initialize->ProtocolIni );
undi_initialize->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_RESET_ADAPTER
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_reset_adapter ( struct s_PXENV_UNDI_RESET
*undi_reset_adapter ) {
int rc;
DBG ( "PXENV_UNDI_RESET_ADAPTER" );
pxe_dump_mcast_list ( &undi_reset_adapter->R_Mcast_Buf );
DBG ( "\n" );
pxe_netdev_close();
if ( ( rc = pxe_netdev_open() ) != 0 ) {
DBG ( "PXENV_UNDI_RESET_ADAPTER could not reopen %s: %s\n",
pxe_netdev->name, strerror ( rc ) );
undi_reset_adapter->Status = PXENV_STATUS ( rc );
return PXENV_EXIT_FAILURE;
}
undi_reset_adapter->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_SHUTDOWN
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_shutdown ( struct s_PXENV_UNDI_SHUTDOWN
*undi_shutdown ) {
DBG ( "PXENV_UNDI_SHUTDOWN\n" );
pxe_netdev_close();
undi_shutdown->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_OPEN
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_open ( struct s_PXENV_UNDI_OPEN *undi_open ) {
int rc;
DBG ( "PXENV_UNDI_OPEN flag %04x filter %04x",
undi_open->OpenFlag, undi_open->PktFilter );
pxe_dump_mcast_list ( &undi_open->R_Mcast_Buf );
DBG ( "\n" );
if ( ( rc = pxe_netdev_open() ) != 0 ) {
DBG ( "PXENV_UNDI_OPEN could not open %s: %s\n",
pxe_netdev->name, strerror ( rc ) );
undi_open->Status = PXENV_STATUS ( rc );
return PXENV_EXIT_FAILURE;
}
undi_open->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_CLOSE
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_close ( struct s_PXENV_UNDI_CLOSE *undi_close ) {
DBG ( "PXENV_UNDI_CLOSE\n" );
pxe_netdev_close();
undi_close->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_TRANSMIT
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_transmit ( struct s_PXENV_UNDI_TRANSMIT
*undi_transmit ) {
struct s_PXENV_UNDI_TBD tbd;
struct DataBlk *datablk;
struct io_buffer *iobuf;
struct net_protocol *net_protocol;
struct ll_protocol *ll_protocol = pxe_netdev->ll_protocol;
char destaddr[MAX_LL_ADDR_LEN];
const void *ll_dest;
size_t ll_hlen = ll_protocol->ll_header_len;
size_t len;
unsigned int i;
int rc;
DBG2 ( "PXENV_UNDI_TRANSMIT" );
/* Forcibly enable interrupts at this point, to work around
* callers that never call PXENV_UNDI_OPEN before attempting
* to use the UNDI API.
*/
netdev_irq ( pxe_netdev, 1 );
/* Identify network-layer protocol */
switch ( undi_transmit->Protocol ) {
case P_IP: net_protocol = &ipv4_protocol; break;
case P_ARP: net_protocol = &arp_protocol; break;
case P_RARP: net_protocol = &rarp_protocol; break;
case P_UNKNOWN:
net_protocol = NULL;
ll_hlen = 0;
break;
default:
DBG2 ( " %02x invalid protocol\n", undi_transmit->Protocol );
undi_transmit->Status = PXENV_STATUS_UNDI_INVALID_PARAMETER;
return PXENV_EXIT_FAILURE;
}
DBG2 ( " %s", ( net_protocol ? net_protocol->name : "RAW" ) );
/* Calculate total packet length */
copy_from_real ( &tbd, undi_transmit->TBD.segment,
undi_transmit->TBD.offset, sizeof ( tbd ) );
len = tbd.ImmedLength;
DBG2 ( " %04x:%04x+%x", tbd.Xmit.segment, tbd.Xmit.offset,
tbd.ImmedLength );
for ( i = 0 ; i < tbd.DataBlkCount ; i++ ) {
datablk = &tbd.DataBlock[i];
len += datablk->TDDataLen;
DBG2 ( " %04x:%04x+%x", datablk->TDDataPtr.segment,
datablk->TDDataPtr.offset, datablk->TDDataLen );
}
/* Allocate and fill I/O buffer */
iobuf = alloc_iob ( ll_hlen + len );
if ( ! iobuf ) {
DBG2 ( " could not allocate iobuf\n" );
undi_transmit->Status = PXENV_STATUS_OUT_OF_RESOURCES;
return PXENV_EXIT_FAILURE;
}
iob_reserve ( iobuf, ll_hlen );
copy_from_real ( iob_put ( iobuf, tbd.ImmedLength ), tbd.Xmit.segment,
tbd.Xmit.offset, tbd.ImmedLength );
for ( i = 0 ; i < tbd.DataBlkCount ; i++ ) {
datablk = &tbd.DataBlock[i];
copy_from_real ( iob_put ( iobuf, datablk->TDDataLen ),
datablk->TDDataPtr.segment,
datablk->TDDataPtr.offset,
datablk->TDDataLen );
}
/* Add link-layer header, if required to do so */
if ( net_protocol != NULL ) {
/* Calculate destination address */
if ( undi_transmit->XmitFlag == XMT_DESTADDR ) {
copy_from_real ( destaddr,
undi_transmit->DestAddr.segment,
undi_transmit->DestAddr.offset,
ll_protocol->ll_addr_len );
ll_dest = destaddr;
DBG2 ( " DEST %s", ll_protocol->ntoa ( ll_dest ) );
} else {
ll_dest = pxe_netdev->ll_broadcast;
DBG2 ( " BCAST" );
}
/* Add link-layer header */
if ( ( rc = ll_protocol->push ( pxe_netdev, iobuf, ll_dest,
pxe_netdev->ll_addr,
net_protocol->net_proto ))!=0){
DBG2 ( " could not add link-layer header: %s\n",
strerror ( rc ) );
free_iob ( iobuf );
undi_transmit->Status = PXENV_STATUS ( rc );
return PXENV_EXIT_FAILURE;
}
}
/* Flag transmission as in-progress. Do this before starting
* to transmit the packet, because the ISR may trigger before
* we return from netdev_tx().
*/
undi_tx_count++;
/* Transmit packet */
DBG2 ( "\n" );
if ( ( rc = netdev_tx ( pxe_netdev, iobuf ) ) != 0 ) {
DBG2 ( "PXENV_UNDI_TRANSMIT could not transmit: %s\n",
strerror ( rc ) );
undi_tx_count--;
undi_transmit->Status = PXENV_STATUS ( rc );
return PXENV_EXIT_FAILURE;
}
undi_transmit->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_SET_MCAST_ADDRESS
*
* Status: working (for NICs that support receive-all-multicast)
*/
PXENV_EXIT_t
pxenv_undi_set_mcast_address ( struct s_PXENV_UNDI_SET_MCAST_ADDRESS
*undi_set_mcast_address ) {
DBG ( "PXENV_UNDI_SET_MCAST_ADDRESS" );
pxe_dump_mcast_list ( &undi_set_mcast_address->R_Mcast_Buf );
DBG ( "\n" );
undi_set_mcast_address->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_SET_STATION_ADDRESS
*
* Status: working
*/
PXENV_EXIT_t
pxenv_undi_set_station_address ( struct s_PXENV_UNDI_SET_STATION_ADDRESS
*undi_set_station_address ) {
struct ll_protocol *ll_protocol = pxe_netdev->ll_protocol;
DBG ( "PXENV_UNDI_SET_STATION_ADDRESS %s",
ll_protocol->ntoa ( undi_set_station_address->StationAddress ) );
/* If adapter is open, the change will have no effect; return
* an error
*/
if ( netdev_is_open ( pxe_netdev ) ) {
DBG ( " failed: netdev is open\n" );
undi_set_station_address->Status =
PXENV_STATUS_UNDI_INVALID_STATE;
return PXENV_EXIT_FAILURE;
}
/* Update MAC address */
memcpy ( pxe_netdev->ll_addr,
&undi_set_station_address->StationAddress,
ll_protocol->ll_addr_len );
DBG ( "\n" );
undi_set_station_address->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_SET_PACKET_FILTER
*
* Status: won't implement (would require driver API changes for no
* real benefit)
*/
PXENV_EXIT_t
pxenv_undi_set_packet_filter ( struct s_PXENV_UNDI_SET_PACKET_FILTER
*undi_set_packet_filter ) {
DBG ( "PXENV_UNDI_SET_PACKET_FILTER %02x\n",
undi_set_packet_filter->filter );
/* Pretend that we succeeded, otherwise the 3Com DOS UNDI
* driver refuses to load. (We ignore the filter value in the
* PXENV_UNDI_OPEN call anyway.)
*/
undi_set_packet_filter->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_GET_INFORMATION
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_get_information ( struct s_PXENV_UNDI_GET_INFORMATION
*undi_get_information ) {
struct device *dev = pxe_netdev->dev;
struct ll_protocol *ll_protocol = pxe_netdev->ll_protocol;
size_t ll_addr_len = ll_protocol->ll_addr_len;
DBG ( "PXENV_UNDI_GET_INFORMATION" );
undi_get_information->BaseIo = dev->desc.ioaddr;
undi_get_information->IntNumber = dev->desc.irq;
/* Cheat: assume all cards can cope with this */
undi_get_information->MaxTranUnit = ETH_MAX_MTU;
undi_get_information->HwType = ntohs ( ll_protocol->ll_proto );
undi_get_information->HwAddrLen = ll_addr_len;
assert ( ll_addr_len <=
sizeof ( undi_get_information->CurrentNodeAddress ) );
memcpy ( &undi_get_information->CurrentNodeAddress,
pxe_netdev->ll_addr,
sizeof ( undi_get_information->CurrentNodeAddress ) );
ll_protocol->init_addr ( pxe_netdev->hw_addr,
&undi_get_information->PermNodeAddress );
undi_get_information->ROMAddress = 0;
/* nic.rom_info->rom_segment; */
/* We only provide the ability to receive or transmit a single
* packet at a time. This is a bootloader, not an OS.
*/
undi_get_information->RxBufCt = 1;
undi_get_information->TxBufCt = 1;
DBG ( " io %04x irq %d mtu %d %s %s\n",
undi_get_information->BaseIo, undi_get_information->IntNumber,
undi_get_information->MaxTranUnit, ll_protocol->name,
ll_protocol->ntoa ( &undi_get_information->CurrentNodeAddress ));
undi_get_information->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_GET_STATISTICS
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_get_statistics ( struct s_PXENV_UNDI_GET_STATISTICS
*undi_get_statistics ) {
DBG ( "PXENV_UNDI_GET_STATISTICS" );
undi_get_statistics->XmtGoodFrames = pxe_netdev->tx_stats.good;
undi_get_statistics->RcvGoodFrames = pxe_netdev->rx_stats.good;
undi_get_statistics->RcvCRCErrors = pxe_netdev->rx_stats.bad;
undi_get_statistics->RcvResourceErrors = pxe_netdev->rx_stats.bad;
DBG ( " txok %d rxok %d rxcrc %d rxrsrc %d\n",
undi_get_statistics->XmtGoodFrames,
undi_get_statistics->RcvGoodFrames,
undi_get_statistics->RcvCRCErrors,
undi_get_statistics->RcvResourceErrors );
undi_get_statistics->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_CLEAR_STATISTICS
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_clear_statistics ( struct s_PXENV_UNDI_CLEAR_STATISTICS
*undi_clear_statistics ) {
DBG ( "PXENV_UNDI_CLEAR_STATISTICS\n" );
memset ( &pxe_netdev->tx_stats, 0, sizeof ( pxe_netdev->tx_stats ) );
memset ( &pxe_netdev->rx_stats, 0, sizeof ( pxe_netdev->rx_stats ) );
undi_clear_statistics->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_INITIATE_DIAGS
*
* Status: won't implement (would require driver API changes for no
* real benefit)
*/
PXENV_EXIT_t pxenv_undi_initiate_diags ( struct s_PXENV_UNDI_INITIATE_DIAGS
*undi_initiate_diags ) {
DBG ( "PXENV_UNDI_INITIATE_DIAGS failed: unsupported\n" );
undi_initiate_diags->Status = PXENV_STATUS_UNSUPPORTED;
return PXENV_EXIT_FAILURE;
}
/* PXENV_UNDI_FORCE_INTERRUPT
*
* Status: won't implement (would require driver API changes for no
* perceptible benefit)
*/
PXENV_EXIT_t pxenv_undi_force_interrupt ( struct s_PXENV_UNDI_FORCE_INTERRUPT
*undi_force_interrupt ) {
DBG ( "PXENV_UNDI_FORCE_INTERRUPT failed: unsupported\n" );
undi_force_interrupt->Status = PXENV_STATUS_UNSUPPORTED;
return PXENV_EXIT_FAILURE;
}
/* PXENV_UNDI_GET_MCAST_ADDRESS
*
* Status: working
*/
PXENV_EXIT_t
pxenv_undi_get_mcast_address ( struct s_PXENV_UNDI_GET_MCAST_ADDRESS
*undi_get_mcast_address ) {
struct ll_protocol *ll_protocol = pxe_netdev->ll_protocol;
struct in_addr ip = { .s_addr = undi_get_mcast_address->InetAddr };
int rc;
DBG ( "PXENV_UNDI_GET_MCAST_ADDRESS %s", inet_ntoa ( ip ) );
if ( ( rc = ll_protocol->mc_hash ( AF_INET, &ip,
undi_get_mcast_address->MediaAddr ))!=0){
DBG ( " failed: %s\n", strerror ( rc ) );
undi_get_mcast_address->Status = PXENV_STATUS ( rc );
return PXENV_EXIT_FAILURE;
}
DBG ( "=>%s\n",
ll_protocol->ntoa ( undi_get_mcast_address->MediaAddr ) );
undi_get_mcast_address->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_GET_NIC_TYPE
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_get_nic_type ( struct s_PXENV_UNDI_GET_NIC_TYPE
*undi_get_nic_type ) {
struct device *dev = pxe_netdev->dev;
DBG ( "PXENV_UNDI_GET_NIC_TYPE" );
memset ( &undi_get_nic_type->info, 0,
sizeof ( undi_get_nic_type->info ) );
switch ( dev->desc.bus_type ) {
case BUS_TYPE_PCI: {
struct pci_nic_info *info = &undi_get_nic_type->info.pci;
undi_get_nic_type->NicType = PCI_NIC;
info->Vendor_ID = dev->desc.vendor;
info->Dev_ID = dev->desc.device;
info->Base_Class = PCI_BASE_CLASS ( dev->desc.class );
info->Sub_Class = PCI_SUB_CLASS ( dev->desc.class );
info->Prog_Intf = PCI_PROG_INTF ( dev->desc.class );
info->BusDevFunc = dev->desc.location;
/* Cheat: remaining fields are probably unnecessary,
* and would require adding extra code to pci.c.
*/
undi_get_nic_type->info.pci.SubVendor_ID = 0xffff;
undi_get_nic_type->info.pci.SubDevice_ID = 0xffff;
DBG ( " PCI %02x:%02x.%x %04x:%04x (%04x:%04x) %02x%02x%02x "
"rev %02x\n", PCI_BUS ( info->BusDevFunc ),
PCI_SLOT ( info->BusDevFunc ),
PCI_FUNC ( info->BusDevFunc ), info->Vendor_ID,
info->Dev_ID, info->SubVendor_ID, info->SubDevice_ID,
info->Base_Class, info->Sub_Class, info->Prog_Intf,
info->Rev );
break; }
case BUS_TYPE_ISAPNP: {
struct pnp_nic_info *info = &undi_get_nic_type->info.pnp;
undi_get_nic_type->NicType = PnP_NIC;
info->EISA_Dev_ID = ( ( dev->desc.vendor << 16 ) |
dev->desc.device );
info->CardSelNum = dev->desc.location;
/* Cheat: remaining fields are probably unnecessary,
* and would require adding extra code to isapnp.c.
*/
DBG ( " ISAPnP CSN %04x %08x %02x%02x%02x\n",
info->CardSelNum, info->EISA_Dev_ID,
info->Base_Class, info->Sub_Class, info->Prog_Intf );
break; }
default:
DBG ( " failed: unknown bus type\n" );
undi_get_nic_type->Status = PXENV_STATUS_FAILURE;
return PXENV_EXIT_FAILURE;
}
undi_get_nic_type->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_GET_IFACE_INFO
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_get_iface_info ( struct s_PXENV_UNDI_GET_IFACE_INFO
*undi_get_iface_info ) {
DBG ( "PXENV_UNDI_GET_IFACE_INFO" );
/* Just hand back some info, doesn't really matter what it is.
* Most PXE stacks seem to take this approach.
*/
snprintf ( ( char * ) undi_get_iface_info->IfaceType,
sizeof ( undi_get_iface_info->IfaceType ), "DIX+802.3" );
undi_get_iface_info->LinkSpeed = 10000000; /* 10 Mbps */
undi_get_iface_info->ServiceFlags =
( SUPPORTED_BROADCAST | SUPPORTED_MULTICAST |
SUPPORTED_SET_STATION_ADDRESS | SUPPORTED_RESET |
SUPPORTED_OPEN_CLOSE | SUPPORTED_IRQ );
memset ( undi_get_iface_info->Reserved, 0,
sizeof(undi_get_iface_info->Reserved) );
DBG ( " %s %dbps flags %08x\n", undi_get_iface_info->IfaceType,
undi_get_iface_info->LinkSpeed,
undi_get_iface_info->ServiceFlags );
undi_get_iface_info->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
/* PXENV_UNDI_GET_STATE
*
* Status: impossible
*/
PXENV_EXIT_t pxenv_undi_get_state ( struct s_PXENV_UNDI_GET_STATE
*undi_get_state ) {
DBG ( "PXENV_UNDI_GET_STATE failed: unsupported\n" );
undi_get_state->Status = PXENV_STATUS_UNSUPPORTED;
return PXENV_EXIT_FAILURE;
};
/* PXENV_UNDI_ISR
*
* Status: working
*/
PXENV_EXIT_t pxenv_undi_isr ( struct s_PXENV_UNDI_ISR *undi_isr ) {
struct io_buffer *iobuf;
size_t len;
struct ll_protocol *ll_protocol;
const void *ll_dest;
const void *ll_source;
uint16_t net_proto;
size_t ll_hlen;
struct net_protocol *net_protocol;
unsigned int prottype;
int rc;
/* Use coloured debug, since UNDI ISR messages are likely to
* be interspersed amongst other UNDI messages.
*/
DBGC2 ( &pxenv_undi_isr, "PXENV_UNDI_ISR" );
/* Just in case some idiot actually looks at these fields when
* we weren't meant to fill them in...
*/
undi_isr->BufferLength = 0;
undi_isr->FrameLength = 0;
undi_isr->FrameHeaderLength = 0;
undi_isr->ProtType = 0;
undi_isr->PktType = 0;
switch ( undi_isr->FuncFlag ) {
case PXENV_UNDI_ISR_IN_START :
DBGC2 ( &pxenv_undi_isr, " START" );
/* Call poll(). This should acknowledge the device
* interrupt and queue up any received packet.
*/
netdev_poll ( pxe_netdev );
/* Disable interrupts to avoid interrupt storm */
netdev_irq ( pxe_netdev, 0 );
/* Always say it was ours for the sake of simplicity */
DBGC2 ( &pxenv_undi_isr, " OURS" );
undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_OURS;
break;
case PXENV_UNDI_ISR_IN_PROCESS :
case PXENV_UNDI_ISR_IN_GET_NEXT :
DBGC2 ( &pxenv_undi_isr, " %s",
( ( undi_isr->FuncFlag == PXENV_UNDI_ISR_IN_PROCESS ) ?
"PROCESS" : "GET_NEXT" ) );
/* Some dumb NBPs (e.g. emBoot's winBoot/i) never call
* PXENV_UNDI_ISR with FuncFlag=PXENV_UNDI_ISR_START;
* they just sit in a tight polling loop merrily
* violating the PXE spec with repeated calls to
* PXENV_UNDI_ISR_IN_PROCESS. Force extra polls to
* cope with these out-of-spec clients.
*/
netdev_poll ( pxe_netdev );
/* If we have not yet marked a TX as complete, and the
* netdev TX queue is empty, report the TX completion.
*/
if ( undi_tx_count && list_empty ( &pxe_netdev->tx_queue ) ) {
DBGC2 ( &pxenv_undi_isr, " TXC" );
undi_tx_count--;
undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_TRANSMIT;
break;
}
/* Remove first packet from netdev RX queue */
iobuf = netdev_rx_dequeue ( pxe_netdev );
if ( ! iobuf ) {
DBGC2 ( &pxenv_undi_isr, " DONE" );
/* No more packets remaining */
undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_DONE;
/* Re-enable interrupts */
netdev_irq ( pxe_netdev, 1 );
break;
}
/* Copy packet to base memory buffer */
len = iob_len ( iobuf );
DBGC2 ( &pxenv_undi_isr, " RX" );
if ( len > sizeof ( basemem_packet ) ) {
/* Should never happen */
DBGC2 ( &pxenv_undi_isr, " overlength (%zx)", len );
len = sizeof ( basemem_packet );
}
memcpy ( basemem_packet, iobuf->data, len );
/* Strip link-layer header */
ll_protocol = pxe_netdev->ll_protocol;
if ( ( rc = ll_protocol->pull ( pxe_netdev, iobuf, &ll_dest,
&ll_source, &net_proto )) !=0){
/* Assume unknown net_proto and no ll_source */
net_proto = 0;
ll_source = NULL;
}
ll_hlen = ( len - iob_len ( iobuf ) );
/* Determine network-layer protocol */
switch ( net_proto ) {
case htons ( ETH_P_IP ):
net_protocol = &ipv4_protocol;
prottype = P_IP;
break;
case htons ( ETH_P_ARP ):
net_protocol = &arp_protocol;
prottype = P_ARP;
break;
case htons ( ETH_P_RARP ):
net_protocol = &rarp_protocol;
prottype = P_RARP;
break;
default:
net_protocol = NULL;
prottype = P_UNKNOWN;
break;
}
/* Fill in UNDI_ISR structure */
undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_RECEIVE;
undi_isr->BufferLength = len;
undi_isr->FrameLength = len;
undi_isr->FrameHeaderLength = ll_hlen;
undi_isr->Frame.segment = rm_ds;
undi_isr->Frame.offset = __from_data16 ( basemem_packet );
undi_isr->ProtType = prottype;
undi_isr->PktType = XMT_DESTADDR;
DBGC2 ( &pxenv_undi_isr, " %04x:%04x+%x(%x) %s hlen %d",
undi_isr->Frame.segment, undi_isr->Frame.offset,
undi_isr->BufferLength, undi_isr->FrameLength,
( net_protocol ? net_protocol->name : "RAW" ),
undi_isr->FrameHeaderLength );
/* Free packet */
free_iob ( iobuf );
break;
default :
DBGC2 ( &pxenv_undi_isr, " INVALID(%04x)\n",
undi_isr->FuncFlag );
/* Should never happen */
undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_DONE;
undi_isr->Status = PXENV_STATUS_UNDI_INVALID_PARAMETER;
return PXENV_EXIT_FAILURE;
}
DBGC2 ( &pxenv_undi_isr, "\n" );
undi_isr->Status = PXENV_STATUS_SUCCESS;
return PXENV_EXIT_SUCCESS;
}
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