/** * Close PXE network device * */ static void pxe_netdev_close ( void ) { assert ( pxe_netdev != NULL ); netdev_rx_unfreeze ( pxe_netdev ); netdev_irq ( pxe_netdev, 0 ); netdev_close ( pxe_netdev ); undi_tx_count = 0; }
/** * 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; }
/** * Open PXE network device * * @ret rc Return status code */ static int pxe_netdev_open ( void ) { int rc; assert ( pxe_netdev != NULL ); if ( ( rc = netdev_open ( pxe_netdev ) ) != 0 ) return rc; netdev_rx_freeze ( pxe_netdev ); netdev_irq ( pxe_netdev, 1 ); return 0; }
/* PXENV_UNDI_GET_MCAST_ADDRESS * * Status: working */ static PXENV_EXIT_t pxenv_undi_get_mcast_address ( struct s_PXENV_UNDI_GET_MCAST_ADDRESS *undi_get_mcast_address ) { struct ll_protocol *ll_protocol; struct in_addr ip = { .s_addr = undi_get_mcast_address->InetAddr }; int rc; /* Sanity check */ if ( ! pxe_netdev ) { DBGC ( &pxe_netdev, "PXENV_UNDI_GET_MCAST_ADDRESS called with " "no network device\n" ); undi_get_mcast_address->Status = PXENV_STATUS_UNDI_INVALID_STATE; return PXENV_EXIT_FAILURE; } DBGC ( &pxe_netdev, "PXENV_UNDI_GET_MCAST_ADDRESS %s", inet_ntoa ( ip ) ); /* Hash address using the network device's link-layer protocol */ ll_protocol = pxe_netdev->ll_protocol; if ( ( rc = ll_protocol->mc_hash ( AF_INET, &ip, undi_get_mcast_address->MediaAddr ))!=0){ DBGC ( &pxe_netdev, " failed: %s\n", strerror ( rc ) ); undi_get_mcast_address->Status = PXENV_STATUS ( rc ); return PXENV_EXIT_FAILURE; } DBGC ( &pxe_netdev, "=>%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 */ static PXENV_EXIT_t pxenv_undi_get_nic_type ( struct s_PXENV_UNDI_GET_NIC_TYPE *undi_get_nic_type ) { struct device *dev; /* Sanity check */ if ( ! pxe_netdev ) { DBGC ( &pxe_netdev, "PXENV_UNDI_GET_NIC_TYPE called with " "no network device\n" ); undi_get_nic_type->Status = PXENV_STATUS_UNDI_INVALID_STATE; return PXENV_EXIT_FAILURE; } DBGC ( &pxe_netdev, "PXENV_UNDI_GET_NIC_TYPE" ); /* Fill in information */ memset ( &undi_get_nic_type->info, 0, sizeof ( undi_get_nic_type->info ) ); dev = pxe_netdev->dev; 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; /* Earlier versions of the PXE specification do not * have the SubVendor_ID and SubDevice_ID fields. It * is possible that some NBPs will not provide space * for them, and so we must not fill them in. */ DBGC ( &pxe_netdev, " 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. */ DBGC ( &pxe_netdev, " 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: DBGC ( &pxe_netdev, " 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 */ static PXENV_EXIT_t pxenv_undi_get_iface_info ( struct s_PXENV_UNDI_GET_IFACE_INFO *undi_get_iface_info ) { /* Sanity check */ if ( ! pxe_netdev ) { DBGC ( &pxe_netdev, "PXENV_UNDI_GET_IFACE_INFO called with " "no network device\n" ); undi_get_iface_info->Status = PXENV_STATUS_UNDI_INVALID_STATE; return PXENV_EXIT_FAILURE; } DBGC ( &pxe_netdev, "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 ); if ( netdev_irq_supported ( pxe_netdev ) ) undi_get_iface_info->ServiceFlags |= SUPPORTED_IRQ; memset ( undi_get_iface_info->Reserved, 0, sizeof(undi_get_iface_info->Reserved) ); DBGC ( &pxe_netdev, " %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 due to opcode collision */ /* PXENV_UNDI_ISR * * Status: working */ static 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; unsigned int flags; size_t ll_hlen; struct net_protocol *net_protocol; unsigned int prottype; int rc; /* Use a different debug colour, since UNDI ISR messages are * likely to be interspersed amongst other UNDI messages. */ /* Sanity check */ if ( ! pxe_netdev ) { DBGC ( &pxenv_undi_isr, "PXENV_UNDI_ISR called with " "no network device\n" ); undi_isr->Status = PXENV_STATUS_UNDI_INVALID_STATE; return PXENV_EXIT_FAILURE; } 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. */ net_poll(); /* 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. */ net_poll(); /* 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, &flags ) ) != 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; if ( flags & LL_BROADCAST ) { undi_isr->PktType = P_BROADCAST; } else if ( flags & LL_MULTICAST ) { undi_isr->PktType = P_MULTICAST; } else { undi_isr->PktType = P_DIRECTED; } 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; } /** PXE UNDI API */ struct pxe_api_call pxe_undi_api[] __pxe_api_call = { PXE_API_CALL ( PXENV_UNDI_STARTUP, pxenv_undi_startup, struct s_PXENV_UNDI_STARTUP ), PXE_API_CALL ( PXENV_UNDI_CLEANUP, pxenv_undi_cleanup, struct s_PXENV_UNDI_CLEANUP ), PXE_API_CALL ( PXENV_UNDI_INITIALIZE, pxenv_undi_initialize, struct s_PXENV_UNDI_INITIALIZE ), PXE_API_CALL ( PXENV_UNDI_RESET_ADAPTER, pxenv_undi_reset_adapter, struct s_PXENV_UNDI_RESET ), PXE_API_CALL ( PXENV_UNDI_SHUTDOWN, pxenv_undi_shutdown, struct s_PXENV_UNDI_SHUTDOWN ), PXE_API_CALL ( PXENV_UNDI_OPEN, pxenv_undi_open, struct s_PXENV_UNDI_OPEN ), PXE_API_CALL ( PXENV_UNDI_CLOSE, pxenv_undi_close, struct s_PXENV_UNDI_CLOSE ), PXE_API_CALL ( PXENV_UNDI_TRANSMIT, pxenv_undi_transmit, struct s_PXENV_UNDI_TRANSMIT ), PXE_API_CALL ( PXENV_UNDI_SET_MCAST_ADDRESS, pxenv_undi_set_mcast_address, struct s_PXENV_UNDI_SET_MCAST_ADDRESS ), PXE_API_CALL ( PXENV_UNDI_SET_STATION_ADDRESS, pxenv_undi_set_station_address, struct s_PXENV_UNDI_SET_STATION_ADDRESS ), PXE_API_CALL ( PXENV_UNDI_SET_PACKET_FILTER, pxenv_undi_set_packet_filter, struct s_PXENV_UNDI_SET_PACKET_FILTER ), PXE_API_CALL ( PXENV_UNDI_GET_INFORMATION, pxenv_undi_get_information, struct s_PXENV_UNDI_GET_INFORMATION ), PXE_API_CALL ( PXENV_UNDI_GET_STATISTICS, pxenv_undi_get_statistics, struct s_PXENV_UNDI_GET_STATISTICS ), PXE_API_CALL ( PXENV_UNDI_CLEAR_STATISTICS, pxenv_undi_clear_statistics, struct s_PXENV_UNDI_CLEAR_STATISTICS ), PXE_API_CALL ( PXENV_UNDI_INITIATE_DIAGS, pxenv_undi_initiate_diags, struct s_PXENV_UNDI_INITIATE_DIAGS ), PXE_API_CALL ( PXENV_UNDI_FORCE_INTERRUPT, pxenv_undi_force_interrupt, struct s_PXENV_UNDI_FORCE_INTERRUPT ), PXE_API_CALL ( PXENV_UNDI_GET_MCAST_ADDRESS, pxenv_undi_get_mcast_address, struct s_PXENV_UNDI_GET_MCAST_ADDRESS ), PXE_API_CALL ( PXENV_UNDI_GET_NIC_TYPE, pxenv_undi_get_nic_type, struct s_PXENV_UNDI_GET_NIC_TYPE ), PXE_API_CALL ( PXENV_UNDI_GET_IFACE_INFO, pxenv_undi_get_iface_info, struct s_PXENV_UNDI_GET_IFACE_INFO ), PXE_API_CALL ( PXENV_UNDI_ISR, pxenv_undi_isr, struct s_PXENV_UNDI_ISR ), };
/* PXENV_UNDI_TRANSMIT * * Status: working */ static 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; char destaddr[MAX_LL_ADDR_LEN]; const void *ll_dest; size_t len; unsigned int i; int rc; /* Start profiling */ profile_start ( &undi_tx_profiler ); /* Sanity check */ if ( ! pxe_netdev ) { DBGC ( &pxe_netdev, "PXENV_UNDI_TRANSMIT called with no " "network device\n" ); undi_transmit->Status = PXENV_STATUS_UNDI_INVALID_STATE; return PXENV_EXIT_FAILURE; } DBGC2 ( &pxe_netdev, "PXENV_UNDI_TRANSMIT" ); /* Forcibly enable interrupts and freeze receive queue * processing at this point, to work around callers that never * call PXENV_UNDI_OPEN before attempting to use the UNDI API. */ if ( ! netdev_rx_frozen ( pxe_netdev ) ) { netdev_rx_freeze ( pxe_netdev ); 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; break; default: DBGC2 ( &pxe_netdev, " %02x invalid protocol\n", undi_transmit->Protocol ); undi_transmit->Status = PXENV_STATUS_UNDI_INVALID_PARAMETER; return PXENV_EXIT_FAILURE; } DBGC2 ( &pxe_netdev, " %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; DBGC2 ( &pxe_netdev, " %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; DBGC2 ( &pxe_netdev, " %04x:%04x+%x", datablk->TDDataPtr.segment, datablk->TDDataPtr.offset, datablk->TDDataLen ); } /* Allocate and fill I/O buffer */ iobuf = alloc_iob ( MAX_LL_HEADER_LEN + ( ( len > IOB_ZLEN ) ? len : IOB_ZLEN ) ); if ( ! iobuf ) { DBGC2 ( &pxe_netdev, " could not allocate iobuf\n" ); undi_transmit->Status = PXENV_STATUS_OUT_OF_RESOURCES; return PXENV_EXIT_FAILURE; } iob_reserve ( iobuf, MAX_LL_HEADER_LEN ); 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 */ ll_protocol = pxe_netdev->ll_protocol; 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; DBGC2 ( &pxe_netdev, " DEST %s", ll_protocol->ntoa ( ll_dest ) ); } else { ll_dest = pxe_netdev->ll_broadcast; DBGC2 ( &pxe_netdev, " BCAST" ); } /* Add link-layer header */ if ( ( rc = ll_protocol->push ( pxe_netdev, iobuf, ll_dest, pxe_netdev->ll_addr, net_protocol->net_proto ))!=0){ DBGC2 ( &pxe_netdev, " 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 */ DBGC2 ( &pxe_netdev, "\n" ); if ( ( rc = netdev_tx ( pxe_netdev, iobuf ) ) != 0 ) { DBGC2 ( &pxe_netdev, "PXENV_UNDI_TRANSMIT could not transmit: " "%s\n", strerror ( rc ) ); undi_tx_count--; undi_transmit->Status = PXENV_STATUS ( rc ); return PXENV_EXIT_FAILURE; } profile_stop ( &undi_tx_profiler ); undi_transmit->Status = PXENV_STATUS_SUCCESS; return PXENV_EXIT_SUCCESS; }
/** * Close PXE network device * */ static void pxe_netdev_close ( void ) { netdev_irq ( pxe_netdev, 0 ); netdev_close ( pxe_netdev ); undi_tx_count = 0; }
/* 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; }