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/*
* Copyright (c) 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.
*
* Redistribution and use in source and binary forms, with or without
* 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
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "dev/pci/host.hh"
#include <utility>
#include "debug/PciHost.hh"
#include "dev/pci/device.hh"
#include "dev/platform.hh"
#include "params/GenericPciHost.hh"
#include "params/PciHost.hh"
PciHost::PciHost(const PciHostParams *p)
: PioDevice(p)
{
}
PciHost::~PciHost()
{
}
PciHost::DeviceInterface
PciHost::registerDevice(PciDevice *device, PciBusAddr bus_addr, PciIntPin pin)
{
auto map_entry = devices.emplace(bus_addr, device);
DPRINTF(PciHost, "%02x:%02x.%i: Registering device\n",
bus_addr.bus, bus_addr.dev, bus_addr.func);
fatal_if(!map_entry.second,
"%02x:%02x.%i: PCI bus ID collision\n",
bus_addr.bus, bus_addr.dev, bus_addr.func);
return DeviceInterface(*this, bus_addr, pin);
}
PciDevice *
PciHost::getDevice(const PciBusAddr &addr)
{
auto device = devices.find(addr);
return device != devices.end() ? device->second : nullptr;
}
const PciDevice *
PciHost::getDevice(const PciBusAddr &addr) const
{
auto device = devices.find(addr);
return device != devices.end() ? device->second : nullptr;
}
PciHost::DeviceInterface::DeviceInterface(
PciHost &_host,
PciBusAddr &bus_addr, PciIntPin interrupt_pin)
: host(_host),
busAddr(bus_addr), interruptPin(interrupt_pin)
{
}
const std::string
PciHost::DeviceInterface::name() const
{
return csprintf("%s.interface[%02x:%02x.%i]",
host.name(), busAddr.bus, busAddr.dev, busAddr.func);
}
void
PciHost::DeviceInterface::postInt()
{
DPRINTF(PciHost, "postInt\n");
host.postInt(busAddr, interruptPin);
}
void
PciHost::DeviceInterface::clearInt()
{
DPRINTF(PciHost, "clearInt\n");
host.clearInt(busAddr, interruptPin);
}
GenericPciHost::GenericPciHost(const GenericPciHostParams *p)
: PciHost(p),
platform(*p->platform),
confBase(p->conf_base), confSize(p->conf_size),
confDeviceBits(p->conf_device_bits),
pciPioBase(p->pci_pio_base), pciMemBase(p->pci_mem_base),
pciDmaBase(p->pci_dma_base)
{
}
GenericPciHost::~GenericPciHost()
{
}
Tick
GenericPciHost::read(PacketPtr pkt)
{
const auto dev_addr(decodeAddress(pkt->getAddr() - confBase));
const Addr size(pkt->getSize());
DPRINTF(PciHost, "%02x:%02x.%i: read: offset=0x%x, size=0x%x\n",
dev_addr.first.bus, dev_addr.first.dev, dev_addr.first.func,
dev_addr.second,
size);
PciDevice *const pci_dev(getDevice(dev_addr.first));
if (pci_dev) {
// @todo Remove this after testing
pkt->headerDelay = pkt->payloadDelay = 0;
return pci_dev->readConfig(pkt);
} else {
uint8_t *pkt_data(pkt->getPtr<uint8_t>());
std::fill(pkt_data, pkt_data + size, 0xFF);
pkt->makeAtomicResponse();
return 0;
}
}
Tick
GenericPciHost::write(PacketPtr pkt)
{
const auto dev_addr(decodeAddress(pkt->getAddr() - confBase));
DPRINTF(PciHost, "%02x:%02x.%i: write: offset=0x%x, size=0x%x\n",
dev_addr.first.bus, dev_addr.first.dev, dev_addr.first.func,
dev_addr.second,
pkt->getSize());
PciDevice *const pci_dev(getDevice(dev_addr.first));
panic_if(!pci_dev,
"%02x:%02x.%i: Write to config space on non-existent PCI device\n",
dev_addr.first.bus, dev_addr.first.dev, dev_addr.first.func);
// @todo Remove this after testing
pkt->headerDelay = pkt->payloadDelay = 0;
return pci_dev->writeConfig(pkt);
}
AddrRangeList
GenericPciHost::getAddrRanges() const
{
return AddrRangeList({ RangeSize(confBase, confSize) });
}
std::pair<PciBusAddr, Addr>
GenericPciHost::decodeAddress(Addr addr)
{
const Addr offset(addr & mask(confDeviceBits));
const Addr bus_addr(addr >> confDeviceBits);
return std::make_pair(
PciBusAddr(bits(bus_addr, 15, 8),
bits(bus_addr, 7, 3),
bits(bus_addr, 2, 0)),
offset);
}
void
GenericPciHost::postInt(const PciBusAddr &addr, PciIntPin pin)
{
platform.postPciInt(mapPciInterrupt(addr, pin));
}
void
GenericPciHost::clearInt(const PciBusAddr &addr, PciIntPin pin)
{
platform.clearPciInt(mapPciInterrupt(addr, pin));
}
uint32_t
GenericPciHost::mapPciInterrupt(const PciBusAddr &addr, PciIntPin pin) const
{
const PciDevice *dev(getDevice(addr));
assert(dev);
return dev->interruptLine();
}
GenericPciHost *
GenericPciHostParams::create()
{
return new GenericPciHost(this);
}