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/*
* Copyright (c) 2013, 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2004-2005 The Regents of The University of Michigan
* All rights reserved.
*
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* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* @file
* A single PCI device configuration space entry.
*/
#include "dev/pci/device.hh"
#include <list>
#include <string>
#include <vector>
#include "base/inifile.hh"
#include "base/intmath.hh"
#include "base/logging.hh"
#include "base/str.hh"
#include "base/trace.hh"
#include "debug/PciDevice.hh"
#include "mem/packet.hh"
#include "mem/packet_access.hh"
#include "sim/byteswap.hh"
#include "sim/core.hh"
PciDevice::PciDevice(const PciDeviceParams &p)
: DmaDevice(p),
_busAddr(p.pci_bus, p.pci_dev, p.pci_func),
PMCAP_BASE(p.PMCAPBaseOffset),
PMCAP_ID_OFFSET(p.PMCAPBaseOffset+PMCAP_ID),
PMCAP_PC_OFFSET(p.PMCAPBaseOffset+PMCAP_PC),
PMCAP_PMCS_OFFSET(p.PMCAPBaseOffset+PMCAP_PMCS),
MSICAP_BASE(p.MSICAPBaseOffset),
MSIXCAP_BASE(p.MSIXCAPBaseOffset),
MSIXCAP_ID_OFFSET(p.MSIXCAPBaseOffset+MSIXCAP_ID),
MSIXCAP_MXC_OFFSET(p.MSIXCAPBaseOffset+MSIXCAP_MXC),
MSIXCAP_MTAB_OFFSET(p.MSIXCAPBaseOffset+MSIXCAP_MTAB),
MSIXCAP_MPBA_OFFSET(p.MSIXCAPBaseOffset+MSIXCAP_MPBA),
PXCAP_BASE(p.PXCAPBaseOffset),
hostInterface(p.host->registerDevice(this, _busAddr,
(PciIntPin)p.InterruptPin)),
pioDelay(p.pio_latency),
configDelay(p.config_latency)
{
fatal_if(p.InterruptPin >= 5,
"Invalid PCI interrupt '%i' specified.", p.InterruptPin);
BARs[0] = p.BAR0;
BARs[1] = p.BAR1;
BARs[2] = p.BAR2;
BARs[3] = p.BAR3;
BARs[4] = p.BAR4;
BARs[5] = p.BAR5;
int idx = 0;
for (auto *bar: BARs) {
auto *mu = dynamic_cast<PciMemUpperBar *>(bar);
// If this is the upper 32 bits of a memory BAR, try to connect it to
// the lower 32 bits.
if (mu) {
fatal_if(idx == 0,
"First BAR in %s is upper 32 bits of a memory BAR.", idx);
auto *ml = dynamic_cast<PciMemBar *>(BARs[idx - 1]);
fatal_if(!ml, "Upper 32 bits of memory BAR in %s doesn't come "
"after the lower 32.");
mu->lower(ml);
}
idx++;
}
config.vendor = htole(p.VendorID);
config.device = htole(p.DeviceID);
config.command = htole(p.Command);
config.status = htole(p.Status);
config.revision = htole(p.Revision);
config.progIF = htole(p.ProgIF);
config.subClassCode = htole(p.SubClassCode);
config.classCode = htole(p.ClassCode);
config.cacheLineSize = htole(p.CacheLineSize);
config.latencyTimer = htole(p.LatencyTimer);
config.headerType = htole(p.HeaderType);
config.bist = htole(p.BIST);
idx = 0;
for (auto *bar: BARs)
config.baseAddr[idx++] = bar->write(hostInterface, 0);
config.cardbusCIS = htole(p.CardbusCIS);
config.subsystemVendorID = htole(p.SubsystemVendorID);
config.subsystemID = htole(p.SubsystemID);
config.expansionROM = htole(p.ExpansionROM);
config.capabilityPtr = htole(p.CapabilityPtr);
// Zero out the 7 bytes of reserved space in the PCI Config space register.
bzero(config.reserved, 7*sizeof(uint8_t));
config.interruptLine = htole(p.InterruptLine);
config.interruptPin = htole(p.InterruptPin);
config.minimumGrant = htole(p.MinimumGrant);
config.maximumLatency = htole(p.MaximumLatency);
// Initialize the capability lists
// These structs are bitunions, meaning the data is stored in host
// endianess and must be converted to Little Endian when accessed
// by the guest
// PMCAP
pmcap.pid = (uint16_t)p.PMCAPCapId; // pid.cid
pmcap.pid |= (uint16_t)p.PMCAPNextCapability << 8; //pid.next
pmcap.pc = p.PMCAPCapabilities;
pmcap.pmcs = p.PMCAPCtrlStatus;
// MSICAP
msicap.mid = (uint16_t)p.MSICAPCapId; //mid.cid
msicap.mid |= (uint16_t)p.MSICAPNextCapability << 8; //mid.next
msicap.mc = p.MSICAPMsgCtrl;
msicap.ma = p.MSICAPMsgAddr;
msicap.mua = p.MSICAPMsgUpperAddr;
msicap.md = p.MSICAPMsgData;
msicap.mmask = p.MSICAPMaskBits;
msicap.mpend = p.MSICAPPendingBits;
// MSIXCAP
msixcap.mxid = (uint16_t)p.MSIXCAPCapId; //mxid.cid
msixcap.mxid |= (uint16_t)p.MSIXCAPNextCapability << 8; //mxid.next
msixcap.mxc = p.MSIXMsgCtrl;
msixcap.mtab = p.MSIXTableOffset;
msixcap.mpba = p.MSIXPbaOffset;
// allocate MSIX structures if MSIXCAP_BASE
// indicates the MSIXCAP is being used by having a
// non-zero base address.
// The MSIX tables are stored by the guest in
// little endian byte-order as according the
// PCIe specification. Make sure to take the proper
// actions when manipulating these tables on the host
uint16_t msixcap_mxc_ts = msixcap.mxc & 0x07ff;
if (MSIXCAP_BASE != 0x0) {
int msix_vecs = msixcap_mxc_ts + 1;
MSIXTable tmp1 = {{0UL,0UL,0UL,0UL}};
msix_table.resize(msix_vecs, tmp1);
MSIXPbaEntry tmp2 = {0};
int pba_size = msix_vecs / MSIXVECS_PER_PBA;
if ((msix_vecs % MSIXVECS_PER_PBA) > 0) {
pba_size++;
}
msix_pba.resize(pba_size, tmp2);
}
MSIX_TABLE_OFFSET = msixcap.mtab & 0xfffffffc;
MSIX_TABLE_END = MSIX_TABLE_OFFSET +
(msixcap_mxc_ts + 1) * sizeof(MSIXTable);
MSIX_PBA_OFFSET = msixcap.mpba & 0xfffffffc;
MSIX_PBA_END = MSIX_PBA_OFFSET +
((msixcap_mxc_ts + 1) / MSIXVECS_PER_PBA)
* sizeof(MSIXPbaEntry);
if (((msixcap_mxc_ts + 1) % MSIXVECS_PER_PBA) > 0) {
MSIX_PBA_END += sizeof(MSIXPbaEntry);
}
// PXCAP
pxcap.pxid = (uint16_t)p.PXCAPCapId; //pxid.cid
pxcap.pxid |= (uint16_t)p.PXCAPNextCapability << 8; //pxid.next
pxcap.pxcap = p.PXCAPCapabilities;
pxcap.pxdcap = p.PXCAPDevCapabilities;
pxcap.pxdc = p.PXCAPDevCtrl;
pxcap.pxds = p.PXCAPDevStatus;
pxcap.pxlcap = p.PXCAPLinkCap;
pxcap.pxlc = p.PXCAPLinkCtrl;
pxcap.pxls = p.PXCAPLinkStatus;
pxcap.pxdcap2 = p.PXCAPDevCap2;
pxcap.pxdc2 = p.PXCAPDevCtrl2;
}
Tick
PciDevice::readConfig(PacketPtr pkt)
{
int offset = pkt->getAddr() & PCI_CONFIG_SIZE;
/* Return 0 for accesses to unimplemented PCI configspace areas */
if (offset >= PCI_DEVICE_SPECIFIC &&
offset < PCI_CONFIG_SIZE) {
warn_once("Device specific PCI config space "
"not implemented for %s!\n", this->name());
switch (pkt->getSize()) {
case sizeof(uint8_t):
pkt->setLE<uint8_t>(0);
break;
case sizeof(uint16_t):
pkt->setLE<uint16_t>(0);
break;
case sizeof(uint32_t):
pkt->setLE<uint32_t>(0);
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
} else if (offset > PCI_CONFIG_SIZE) {
panic("Out-of-range access to PCI config space!\n");
}
switch (pkt->getSize()) {
case sizeof(uint8_t):
pkt->setLE<uint8_t>(config.data[offset]);
DPRINTF(PciDevice,
"readConfig: dev %#x func %#x reg %#x 1 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint8_t>());
break;
case sizeof(uint16_t):
pkt->setLE<uint16_t>(*(uint16_t*)&config.data[offset]);
DPRINTF(PciDevice,
"readConfig: dev %#x func %#x reg %#x 2 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint16_t>());
break;
case sizeof(uint32_t):
pkt->setLE<uint32_t>(*(uint32_t*)&config.data[offset]);
DPRINTF(PciDevice,
"readConfig: dev %#x func %#x reg %#x 4 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint32_t>());
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
pkt->makeAtomicResponse();
return configDelay;
}
AddrRangeList
PciDevice::getAddrRanges() const
{
AddrRangeList ranges;
PciCommandRegister command = letoh(config.command);
for (auto *bar: BARs) {
if (command.ioSpace && bar->isIo())
ranges.push_back(bar->range());
if (command.memorySpace && bar->isMem())
ranges.push_back(bar->range());
}
return ranges;
}
Tick
PciDevice::writeConfig(PacketPtr pkt)
{
int offset = pkt->getAddr() & PCI_CONFIG_SIZE;
/* No effect if we write to config space that is not implemented*/
if (offset >= PCI_DEVICE_SPECIFIC &&
offset < PCI_CONFIG_SIZE) {
warn_once("Device specific PCI config space "
"not implemented for %s!\n", this->name());
switch (pkt->getSize()) {
case sizeof(uint8_t):
case sizeof(uint16_t):
case sizeof(uint32_t):
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
} else if (offset > PCI_CONFIG_SIZE) {
panic("Out-of-range access to PCI config space!\n");
}
switch (pkt->getSize()) {
case sizeof(uint8_t):
switch (offset) {
case PCI0_INTERRUPT_LINE:
config.interruptLine = pkt->getLE<uint8_t>();
break;
case PCI_CACHE_LINE_SIZE:
config.cacheLineSize = pkt->getLE<uint8_t>();
break;
case PCI_LATENCY_TIMER:
config.latencyTimer = pkt->getLE<uint8_t>();
break;
/* Do nothing for these read-only registers */
case PCI0_INTERRUPT_PIN:
case PCI0_MINIMUM_GRANT:
case PCI0_MAXIMUM_LATENCY:
case PCI_CLASS_CODE:
case PCI_REVISION_ID:
break;
default:
panic("writing to a read only register");
}
DPRINTF(PciDevice,
"writeConfig: dev %#x func %#x reg %#x 1 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint8_t>());
break;
case sizeof(uint16_t):
switch (offset) {
case PCI_COMMAND:
config.command = pkt->getLE<uint8_t>();
// IO or memory space may have been enabled/disabled.
pioPort.sendRangeChange();
break;
case PCI_STATUS:
config.status = pkt->getLE<uint8_t>();
break;
case PCI_CACHE_LINE_SIZE:
config.cacheLineSize = pkt->getLE<uint8_t>();
break;
default:
panic("writing to a read only register");
}
DPRINTF(PciDevice,
"writeConfig: dev %#x func %#x reg %#x 2 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint16_t>());
break;
case sizeof(uint32_t):
switch (offset) {
case PCI0_BASE_ADDR0:
case PCI0_BASE_ADDR1:
case PCI0_BASE_ADDR2:
case PCI0_BASE_ADDR3:
case PCI0_BASE_ADDR4:
case PCI0_BASE_ADDR5:
{
int num = BAR_NUMBER(offset);
auto *bar = BARs[num];
config.baseAddr[num] =
htole(bar->write(hostInterface, pkt->getLE<uint32_t>()));
pioPort.sendRangeChange();
}
break;
case PCI0_ROM_BASE_ADDR:
if (letoh(pkt->getLE<uint32_t>()) == 0xfffffffe)
config.expansionROM = htole((uint32_t)0xffffffff);
else
config.expansionROM = pkt->getLE<uint32_t>();
break;
case PCI_COMMAND:
// This could also clear some of the error bits in the Status
// register. However they should never get set, so lets ignore
// it for now
config.command = pkt->getLE<uint32_t>();
// IO or memory space may have been enabled/disabled.
pioPort.sendRangeChange();
break;
default:
DPRINTF(PciDevice, "Writing to a read only register");
}
DPRINTF(PciDevice,
"writeConfig: dev %#x func %#x reg %#x 4 bytes: data = %#x\n",
_busAddr.dev, _busAddr.func, offset,
(uint32_t)pkt->getLE<uint32_t>());
break;
default:
panic("invalid access size(?) for PCI configspace!\n");
}
pkt->makeAtomicResponse();
return configDelay;
}
void
PciDevice::serialize(CheckpointOut &cp) const
{
SERIALIZE_ARRAY(config.data, sizeof(config.data) / sizeof(config.data[0]));
// serialize the capability list registers
paramOut(cp, csprintf("pmcap.pid"), uint16_t(pmcap.pid));
paramOut(cp, csprintf("pmcap.pc"), uint16_t(pmcap.pc));
paramOut(cp, csprintf("pmcap.pmcs"), uint16_t(pmcap.pmcs));
paramOut(cp, csprintf("msicap.mid"), uint16_t(msicap.mid));
paramOut(cp, csprintf("msicap.mc"), uint16_t(msicap.mc));
paramOut(cp, csprintf("msicap.ma"), uint32_t(msicap.ma));
SERIALIZE_SCALAR(msicap.mua);
paramOut(cp, csprintf("msicap.md"), uint16_t(msicap.md));
SERIALIZE_SCALAR(msicap.mmask);
SERIALIZE_SCALAR(msicap.mpend);
paramOut(cp, csprintf("msixcap.mxid"), uint16_t(msixcap.mxid));
paramOut(cp, csprintf("msixcap.mxc"), uint16_t(msixcap.mxc));
paramOut(cp, csprintf("msixcap.mtab"), uint32_t(msixcap.mtab));
paramOut(cp, csprintf("msixcap.mpba"), uint32_t(msixcap.mpba));
// Only serialize if we have a non-zero base address
if (MSIXCAP_BASE != 0x0) {
uint16_t msixcap_mxc_ts = msixcap.mxc & 0x07ff;
int msix_array_size = msixcap_mxc_ts + 1;
int pba_array_size = msix_array_size/MSIXVECS_PER_PBA;
if ((msix_array_size % MSIXVECS_PER_PBA) > 0) {
pba_array_size++;
}
SERIALIZE_SCALAR(msix_array_size);
SERIALIZE_SCALAR(pba_array_size);
for (int i = 0; i < msix_array_size; i++) {
paramOut(cp, csprintf("msix_table[%d].addr_lo", i),
msix_table[i].fields.addr_lo);
paramOut(cp, csprintf("msix_table[%d].addr_hi", i),
msix_table[i].fields.addr_hi);
paramOut(cp, csprintf("msix_table[%d].msg_data", i),
msix_table[i].fields.msg_data);
paramOut(cp, csprintf("msix_table[%d].vec_ctrl", i),
msix_table[i].fields.vec_ctrl);
}
for (int i = 0; i < pba_array_size; i++) {
paramOut(cp, csprintf("msix_pba[%d].bits", i),
msix_pba[i].bits);
}
}
paramOut(cp, csprintf("pxcap.pxid"), uint16_t(pxcap.pxid));
paramOut(cp, csprintf("pxcap.pxcap"), uint16_t(pxcap.pxcap));
paramOut(cp, csprintf("pxcap.pxdcap"), uint32_t(pxcap.pxdcap));
paramOut(cp, csprintf("pxcap.pxdc"), uint16_t(pxcap.pxdc));
paramOut(cp, csprintf("pxcap.pxds"), uint16_t(pxcap.pxds));
paramOut(cp, csprintf("pxcap.pxlcap"), uint32_t(pxcap.pxlcap));
paramOut(cp, csprintf("pxcap.pxlc"), uint16_t(pxcap.pxlc));
paramOut(cp, csprintf("pxcap.pxls"), uint16_t(pxcap.pxls));
paramOut(cp, csprintf("pxcap.pxdcap2"), uint32_t(pxcap.pxdcap2));
paramOut(cp, csprintf("pxcap.pxdc2"), uint32_t(pxcap.pxdc2));
}
void
PciDevice::unserialize(CheckpointIn &cp)
{
UNSERIALIZE_ARRAY(config.data,
sizeof(config.data) / sizeof(config.data[0]));
for (int idx = 0; idx < BARs.size(); idx++)
BARs[idx]->write(hostInterface, config.baseAddr[idx]);
// unserialize the capability list registers
uint16_t tmp16;
uint32_t tmp32;
paramIn(cp, csprintf("pmcap.pid"), tmp16);
pmcap.pid = tmp16;
paramIn(cp, csprintf("pmcap.pc"), tmp16);
pmcap.pc = tmp16;
paramIn(cp, csprintf("pmcap.pmcs"), tmp16);
pmcap.pmcs = tmp16;
paramIn(cp, csprintf("msicap.mid"), tmp16);
msicap.mid = tmp16;
paramIn(cp, csprintf("msicap.mc"), tmp16);
msicap.mc = tmp16;
paramIn(cp, csprintf("msicap.ma"), tmp32);
msicap.ma = tmp32;
UNSERIALIZE_SCALAR(msicap.mua);
paramIn(cp, csprintf("msicap.md"), tmp16);;
msicap.md = tmp16;
UNSERIALIZE_SCALAR(msicap.mmask);
UNSERIALIZE_SCALAR(msicap.mpend);
paramIn(cp, csprintf("msixcap.mxid"), tmp16);
msixcap.mxid = tmp16;
paramIn(cp, csprintf("msixcap.mxc"), tmp16);
msixcap.mxc = tmp16;
paramIn(cp, csprintf("msixcap.mtab"), tmp32);
msixcap.mtab = tmp32;
paramIn(cp, csprintf("msixcap.mpba"), tmp32);
msixcap.mpba = tmp32;
// Only allocate if MSIXCAP_BASE is not 0x0
if (MSIXCAP_BASE != 0x0) {
int msix_array_size;
int pba_array_size;
UNSERIALIZE_SCALAR(msix_array_size);
UNSERIALIZE_SCALAR(pba_array_size);
MSIXTable tmp1 = {{0UL, 0UL, 0UL, 0UL}};
msix_table.resize(msix_array_size, tmp1);
MSIXPbaEntry tmp2 = {0};
msix_pba.resize(pba_array_size, tmp2);
for (int i = 0; i < msix_array_size; i++) {
paramIn(cp, csprintf("msix_table[%d].addr_lo", i),
msix_table[i].fields.addr_lo);
paramIn(cp, csprintf("msix_table[%d].addr_hi", i),
msix_table[i].fields.addr_hi);
paramIn(cp, csprintf("msix_table[%d].msg_data", i),
msix_table[i].fields.msg_data);
paramIn(cp, csprintf("msix_table[%d].vec_ctrl", i),
msix_table[i].fields.vec_ctrl);
}
for (int i = 0; i < pba_array_size; i++) {
paramIn(cp, csprintf("msix_pba[%d].bits", i),
msix_pba[i].bits);
}
}
paramIn(cp, csprintf("pxcap.pxid"), tmp16);
pxcap.pxid = tmp16;
paramIn(cp, csprintf("pxcap.pxcap"), tmp16);
pxcap.pxcap = tmp16;
paramIn(cp, csprintf("pxcap.pxdcap"), tmp32);
pxcap.pxdcap = tmp32;
paramIn(cp, csprintf("pxcap.pxdc"), tmp16);
pxcap.pxdc = tmp16;
paramIn(cp, csprintf("pxcap.pxds"), tmp16);
pxcap.pxds = tmp16;
paramIn(cp, csprintf("pxcap.pxlcap"), tmp32);
pxcap.pxlcap = tmp32;
paramIn(cp, csprintf("pxcap.pxlc"), tmp16);
pxcap.pxlc = tmp16;
paramIn(cp, csprintf("pxcap.pxls"), tmp16);
pxcap.pxls = tmp16;
paramIn(cp, csprintf("pxcap.pxdcap2"), tmp32);
pxcap.pxdcap2 = tmp32;
paramIn(cp, csprintf("pxcap.pxdc2"), tmp32);
pxcap.pxdc2 = tmp32;
pioPort.sendRangeChange();
}