/** @file * * PXE UNDI API * */ /* * Copyright (C) 2004 Michael Brown . * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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 ); /* A 100% accurate determination of "OURS" vs "NOT * OURS" is difficult to achieve without invasive and * unpleasant changes to the driver model. We settle * for always returning "OURS" if interrupts are * currently enabled. * * Returning "NOT OURS" when interrupts are disabled * allows us to avoid a potential interrupt storm when * we are on a shared interrupt line; if we were to * always return "OURS" then the other device's ISR * may never be called. */ if ( netdev_irq_enabled ( pxe_netdev ) ) { DBGC2 ( &pxenv_undi_isr, " OURS" ); undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_OURS; } else { DBGC2 ( &pxenv_undi_isr, " NOT OURS" ); undi_isr->FuncFlag = PXENV_UNDI_ISR_OUT_NOT_OURS; } /* Disable interrupts */ netdev_irq ( pxe_netdev, 0 ); 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; }