pci.cc revision 10602
110388SAndreas.Sandberg@ARM.com/* 210388SAndreas.Sandberg@ARM.com * Copyright (c) 2014 ARM Limited 310388SAndreas.Sandberg@ARM.com * All rights reserved 410388SAndreas.Sandberg@ARM.com * 510388SAndreas.Sandberg@ARM.com * The license below extends only to copyright in the software and shall 610388SAndreas.Sandberg@ARM.com * not be construed as granting a license to any other intellectual 710388SAndreas.Sandberg@ARM.com * property including but not limited to intellectual property relating 810388SAndreas.Sandberg@ARM.com * to a hardware implementation of the functionality of the software 910388SAndreas.Sandberg@ARM.com * licensed hereunder. You may use the software subject to the license 1010388SAndreas.Sandberg@ARM.com * terms below provided that you ensure that this notice is replicated 1110388SAndreas.Sandberg@ARM.com * unmodified and in its entirety in all distributions of the software, 1210388SAndreas.Sandberg@ARM.com * modified or unmodified, in source code or in binary form. 1310388SAndreas.Sandberg@ARM.com * 1410388SAndreas.Sandberg@ARM.com * Redistribution and use in source and binary forms, with or without 1510388SAndreas.Sandberg@ARM.com * modification, are permitted provided that the following conditions are 1610388SAndreas.Sandberg@ARM.com * met: redistributions of source code must retain the above copyright 1710388SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer; 1810388SAndreas.Sandberg@ARM.com * redistributions in binary form must reproduce the above copyright 1910388SAndreas.Sandberg@ARM.com * notice, this list of conditions and the following disclaimer in the 2010388SAndreas.Sandberg@ARM.com * documentation and/or other materials provided with the distribution; 2110388SAndreas.Sandberg@ARM.com * neither the name of the copyright holders nor the names of its 2210388SAndreas.Sandberg@ARM.com * contributors may be used to endorse or promote products derived from 2310388SAndreas.Sandberg@ARM.com * this software without specific prior written permission. 2410388SAndreas.Sandberg@ARM.com * 2510388SAndreas.Sandberg@ARM.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2610388SAndreas.Sandberg@ARM.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2710388SAndreas.Sandberg@ARM.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2810388SAndreas.Sandberg@ARM.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2910388SAndreas.Sandberg@ARM.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 3010388SAndreas.Sandberg@ARM.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3110388SAndreas.Sandberg@ARM.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3210388SAndreas.Sandberg@ARM.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3310388SAndreas.Sandberg@ARM.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3410388SAndreas.Sandberg@ARM.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3510388SAndreas.Sandberg@ARM.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3610388SAndreas.Sandberg@ARM.com * 3710388SAndreas.Sandberg@ARM.com * Authors: Andreas Sandberg 3810388SAndreas.Sandberg@ARM.com */ 3910388SAndreas.Sandberg@ARM.com 4010388SAndreas.Sandberg@ARM.com#include "debug/VIOPci.hh" 4110388SAndreas.Sandberg@ARM.com#include "dev/virtio/pci.hh" 4210388SAndreas.Sandberg@ARM.com#include "mem/packet_access.hh" 4310388SAndreas.Sandberg@ARM.com#include "params/PciVirtIO.hh" 4410388SAndreas.Sandberg@ARM.com 4510388SAndreas.Sandberg@ARM.comPciVirtIO::PciVirtIO(const Params *params) 4610559Sandreas.hansson@arm.com : PciDevice(params), queueNotify(0), interruptDeliveryPending(false), 4710559Sandreas.hansson@arm.com vio(*params->vio), callbackKick(this) 4810388SAndreas.Sandberg@ARM.com{ 4910388SAndreas.Sandberg@ARM.com // Override the subsystem ID with the device ID from VirtIO 5010388SAndreas.Sandberg@ARM.com config.subsystemID = htole(vio.deviceId); 5110388SAndreas.Sandberg@ARM.com BARSize[0] = BAR0_SIZE_BASE + vio.configSize; 5210388SAndreas.Sandberg@ARM.com 5310388SAndreas.Sandberg@ARM.com vio.registerKickCallback(&callbackKick); 5410388SAndreas.Sandberg@ARM.com} 5510388SAndreas.Sandberg@ARM.com 5610388SAndreas.Sandberg@ARM.comPciVirtIO::~PciVirtIO() 5710388SAndreas.Sandberg@ARM.com{ 5810388SAndreas.Sandberg@ARM.com} 5910388SAndreas.Sandberg@ARM.com 6010388SAndreas.Sandberg@ARM.comTick 6110388SAndreas.Sandberg@ARM.comPciVirtIO::read(PacketPtr pkt) 6210388SAndreas.Sandberg@ARM.com{ 6310388SAndreas.Sandberg@ARM.com const unsigned M5_VAR_USED size(pkt->getSize()); 6410388SAndreas.Sandberg@ARM.com int bar; 6510388SAndreas.Sandberg@ARM.com Addr offset; 6610388SAndreas.Sandberg@ARM.com if (!getBAR(pkt->getAddr(), bar, offset)) 6710388SAndreas.Sandberg@ARM.com panic("Invalid PCI memory access to unmapped memory.\n"); 6810388SAndreas.Sandberg@ARM.com assert(bar == 0); 6910388SAndreas.Sandberg@ARM.com 7010388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, "Reading offset 0x%x [len: %i]\n", offset, size); 7110388SAndreas.Sandberg@ARM.com 7210388SAndreas.Sandberg@ARM.com // Forward device configuration writes to the device VirtIO model 7310388SAndreas.Sandberg@ARM.com if (offset >= OFF_VIO_DEVICE) { 7410388SAndreas.Sandberg@ARM.com vio.readConfig(pkt, offset - OFF_VIO_DEVICE); 7510388SAndreas.Sandberg@ARM.com return 0; 7610388SAndreas.Sandberg@ARM.com } 7710388SAndreas.Sandberg@ARM.com 7810602SAndreas.Sandberg@ARM.com pkt->makeResponse(); 7910602SAndreas.Sandberg@ARM.com 8010388SAndreas.Sandberg@ARM.com switch(offset) { 8110388SAndreas.Sandberg@ARM.com case OFF_DEVICE_FEATURES: 8210388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " DEVICE_FEATURES request\n"); 8310388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint32_t)); 8410388SAndreas.Sandberg@ARM.com pkt->set<uint32_t>(vio.deviceFeatures); 8510388SAndreas.Sandberg@ARM.com break; 8610388SAndreas.Sandberg@ARM.com 8710388SAndreas.Sandberg@ARM.com case OFF_GUEST_FEATURES: 8810388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " GUEST_FEATURES request\n"); 8910388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint32_t)); 9010388SAndreas.Sandberg@ARM.com pkt->set<uint32_t>(vio.getGuestFeatures()); 9110388SAndreas.Sandberg@ARM.com break; 9210388SAndreas.Sandberg@ARM.com 9310388SAndreas.Sandberg@ARM.com case OFF_QUEUE_ADDRESS: 9410388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " QUEUE_ADDRESS request\n"); 9510388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint32_t)); 9610388SAndreas.Sandberg@ARM.com pkt->set<uint32_t>(vio.getQueueAddress()); 9710388SAndreas.Sandberg@ARM.com break; 9810388SAndreas.Sandberg@ARM.com 9910388SAndreas.Sandberg@ARM.com case OFF_QUEUE_SIZE: 10010388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " QUEUE_SIZE request\n"); 10110388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint16_t)); 10210388SAndreas.Sandberg@ARM.com pkt->set<uint16_t>(vio.getQueueSize()); 10310388SAndreas.Sandberg@ARM.com break; 10410388SAndreas.Sandberg@ARM.com 10510388SAndreas.Sandberg@ARM.com case OFF_QUEUE_SELECT: 10610388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " QUEUE_SELECT\n"); 10710388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint16_t)); 10810388SAndreas.Sandberg@ARM.com pkt->set<uint16_t>(vio.getQueueSelect()); 10910388SAndreas.Sandberg@ARM.com break; 11010388SAndreas.Sandberg@ARM.com 11110388SAndreas.Sandberg@ARM.com case OFF_QUEUE_NOTIFY: 11210388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " QUEUE_NOTIFY request\n"); 11310388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint16_t)); 11410388SAndreas.Sandberg@ARM.com pkt->set<uint16_t>(queueNotify); 11510388SAndreas.Sandberg@ARM.com break; 11610388SAndreas.Sandberg@ARM.com 11710388SAndreas.Sandberg@ARM.com case OFF_DEVICE_STATUS: 11810388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " DEVICE_STATUS request\n"); 11910388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint8_t)); 12010388SAndreas.Sandberg@ARM.com pkt->set<uint8_t>(vio.getDeviceStatus()); 12110388SAndreas.Sandberg@ARM.com break; 12210388SAndreas.Sandberg@ARM.com 12310388SAndreas.Sandberg@ARM.com case OFF_ISR_STATUS: { 12410388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " ISR_STATUS\n"); 12510388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint8_t)); 12610388SAndreas.Sandberg@ARM.com uint8_t isr_status(interruptDeliveryPending ? 1 : 0); 12710388SAndreas.Sandberg@ARM.com interruptDeliveryPending = false; 12810388SAndreas.Sandberg@ARM.com pkt->set<uint8_t>(isr_status); 12910388SAndreas.Sandberg@ARM.com } break; 13010388SAndreas.Sandberg@ARM.com 13110388SAndreas.Sandberg@ARM.com default: 13210388SAndreas.Sandberg@ARM.com panic("Unhandled read offset (0x%x)\n", offset); 13310388SAndreas.Sandberg@ARM.com } 13410388SAndreas.Sandberg@ARM.com 13510388SAndreas.Sandberg@ARM.com return 0; 13610388SAndreas.Sandberg@ARM.com} 13710388SAndreas.Sandberg@ARM.com 13810388SAndreas.Sandberg@ARM.comTick 13910388SAndreas.Sandberg@ARM.comPciVirtIO::write(PacketPtr pkt) 14010388SAndreas.Sandberg@ARM.com{ 14110388SAndreas.Sandberg@ARM.com const unsigned M5_VAR_USED size(pkt->getSize()); 14210388SAndreas.Sandberg@ARM.com int bar; 14310388SAndreas.Sandberg@ARM.com Addr offset; 14410388SAndreas.Sandberg@ARM.com if (!getBAR(pkt->getAddr(), bar, offset)) 14510388SAndreas.Sandberg@ARM.com panic("Invalid PCI memory access to unmapped memory.\n"); 14610388SAndreas.Sandberg@ARM.com assert(bar == 0); 14710388SAndreas.Sandberg@ARM.com 14810388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, "Writing offset 0x%x [len: %i]\n", offset, size); 14910388SAndreas.Sandberg@ARM.com 15010388SAndreas.Sandberg@ARM.com // Forward device configuration writes to the device VirtIO model 15110388SAndreas.Sandberg@ARM.com if (offset >= OFF_VIO_DEVICE) { 15210388SAndreas.Sandberg@ARM.com vio.writeConfig(pkt, offset - OFF_VIO_DEVICE); 15310388SAndreas.Sandberg@ARM.com return 0; 15410388SAndreas.Sandberg@ARM.com } 15510388SAndreas.Sandberg@ARM.com 15610602SAndreas.Sandberg@ARM.com pkt->makeResponse(); 15710602SAndreas.Sandberg@ARM.com 15810388SAndreas.Sandberg@ARM.com switch(offset) { 15910388SAndreas.Sandberg@ARM.com case OFF_DEVICE_FEATURES: 16010388SAndreas.Sandberg@ARM.com warn("Guest tried to write device features."); 16110388SAndreas.Sandberg@ARM.com break; 16210388SAndreas.Sandberg@ARM.com 16310388SAndreas.Sandberg@ARM.com case OFF_GUEST_FEATURES: 16410388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " WRITE GUEST_FEATURES request\n"); 16510388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint32_t)); 16610388SAndreas.Sandberg@ARM.com vio.setGuestFeatures(pkt->get<uint32_t>()); 16710388SAndreas.Sandberg@ARM.com break; 16810388SAndreas.Sandberg@ARM.com 16910388SAndreas.Sandberg@ARM.com case OFF_QUEUE_ADDRESS: 17010388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " WRITE QUEUE_ADDRESS\n"); 17110388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint32_t)); 17210388SAndreas.Sandberg@ARM.com vio.setQueueAddress(pkt->get<uint32_t>()); 17310388SAndreas.Sandberg@ARM.com break; 17410388SAndreas.Sandberg@ARM.com 17510388SAndreas.Sandberg@ARM.com case OFF_QUEUE_SIZE: 17610388SAndreas.Sandberg@ARM.com panic("Guest tried to write queue size."); 17710388SAndreas.Sandberg@ARM.com break; 17810388SAndreas.Sandberg@ARM.com 17910388SAndreas.Sandberg@ARM.com case OFF_QUEUE_SELECT: 18010388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " WRITE QUEUE_SELECT\n"); 18110388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint16_t)); 18210388SAndreas.Sandberg@ARM.com vio.setQueueSelect(pkt->get<uint16_t>()); 18310388SAndreas.Sandberg@ARM.com break; 18410388SAndreas.Sandberg@ARM.com 18510388SAndreas.Sandberg@ARM.com case OFF_QUEUE_NOTIFY: 18610388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, " WRITE QUEUE_NOTIFY\n"); 18710388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint16_t)); 18810388SAndreas.Sandberg@ARM.com queueNotify = pkt->get<uint16_t>(); 18910388SAndreas.Sandberg@ARM.com vio.onNotify(queueNotify); 19010388SAndreas.Sandberg@ARM.com break; 19110388SAndreas.Sandberg@ARM.com 19210388SAndreas.Sandberg@ARM.com case OFF_DEVICE_STATUS: { 19310388SAndreas.Sandberg@ARM.com assert(size == sizeof(uint8_t)); 19410388SAndreas.Sandberg@ARM.com uint8_t status(pkt->get<uint8_t>()); 19510388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, "VirtIO set status: 0x%x\n", status); 19610388SAndreas.Sandberg@ARM.com vio.setDeviceStatus(status); 19710388SAndreas.Sandberg@ARM.com } break; 19810388SAndreas.Sandberg@ARM.com 19910388SAndreas.Sandberg@ARM.com case OFF_ISR_STATUS: 20010388SAndreas.Sandberg@ARM.com warn("Guest tried to write ISR status."); 20110388SAndreas.Sandberg@ARM.com break; 20210388SAndreas.Sandberg@ARM.com 20310388SAndreas.Sandberg@ARM.com default: 20410388SAndreas.Sandberg@ARM.com panic("Unhandled read offset (0x%x)\n", offset); 20510388SAndreas.Sandberg@ARM.com } 20610388SAndreas.Sandberg@ARM.com 20710388SAndreas.Sandberg@ARM.com return 0; 20810388SAndreas.Sandberg@ARM.com} 20910388SAndreas.Sandberg@ARM.com 21010388SAndreas.Sandberg@ARM.comvoid 21110388SAndreas.Sandberg@ARM.comPciVirtIO::kick() 21210388SAndreas.Sandberg@ARM.com{ 21310388SAndreas.Sandberg@ARM.com DPRINTF(VIOPci, "kick(): Sending interrupt...\n"); 21410388SAndreas.Sandberg@ARM.com interruptDeliveryPending = true; 21510388SAndreas.Sandberg@ARM.com intrPost(); 21610388SAndreas.Sandberg@ARM.com} 21710388SAndreas.Sandberg@ARM.com 21810388SAndreas.Sandberg@ARM.comPciVirtIO * 21910388SAndreas.Sandberg@ARM.comPciVirtIOParams::create() 22010388SAndreas.Sandberg@ARM.com{ 22110388SAndreas.Sandberg@ARM.com return new PciVirtIO(this); 22210388SAndreas.Sandberg@ARM.com} 223