qemu-e2k/hw/pci-host/gpex.c

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/*
* QEMU Generic PCI Express Bridge Emulation
*
* Copyright (C) 2015 Alexander Graf <agraf@suse.de>
*
* Code loosely based on q35.c.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Check out these documents for more information on the device:
*
* http://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-generic-pci.txt
* http://www.firmware.org/1275/practice/imap/imap0_9d.pdf
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/irq.h"
#include "hw/pci-host/gpex.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "qemu/module.h"
/****************************************************************************
* GPEX host
*/
static void gpex_set_irq(void *opaque, int irq_num, int level)
{
GPEXHost *s = opaque;
qemu_set_irq(s->irq[irq_num], level);
}
int gpex_set_irq_num(GPEXHost *s, int index, int gsi)
{
if (index >= GPEX_NUM_IRQS) {
return -EINVAL;
}
s->irq_num[index] = gsi;
return 0;
}
static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin)
{
PCIINTxRoute route;
GPEXHost *s = opaque;
int gsi = s->irq_num[pin];
route.irq = gsi;
if (gsi < 0) {
route.mode = PCI_INTX_DISABLED;
} else {
route.mode = PCI_INTX_ENABLED;
}
return route;
}
static void gpex_host_realize(DeviceState *dev, Error **errp)
{
PCIHostState *pci = PCI_HOST_BRIDGE(dev);
GPEXHost *s = GPEX_HOST(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev);
int i;
pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
sysbus_init_mmio(sbd, &pex->mmio);
/*
* Note that the MemoryRegions io_mmio and io_ioport that we pass
* to pci_register_root_bus() are not the same as the
* MemoryRegions io_mmio_window and io_ioport_window that we
* expose as SysBus MRs. The difference is in the behaviour of
* accesses to addresses where no PCI device has been mapped.
*
* io_mmio and io_ioport are the underlying PCI view of the PCI
* address space, and when a PCI device does a bus master access
* to a bad address this is reported back to it as a transaction
* failure.
*
* io_mmio_window and io_ioport_window implement "unmapped
* addresses read as -1 and ignore writes"; this is traditional
* x86 PC behaviour, which is not mandated by the PCI spec proper
* but expected by much PCI-using guest software, including Linux.
*
* In the interests of not being unnecessarily surprising, we
* implement it in the gpex PCI host controller, by providing the
* _window MRs, which are containers with io ops that implement
* the 'background' behaviour and which hold the real PCI MRs as
* subregions.
*/
memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
if (s->allow_unmapped_accesses) {
memory_region_init_io(&s->io_mmio_window, OBJECT(s),
&unassigned_io_ops, OBJECT(s),
"gpex_mmio_window", UINT64_MAX);
memory_region_init_io(&s->io_ioport_window, OBJECT(s),
&unassigned_io_ops, OBJECT(s),
"gpex_ioport_window", 64 * 1024);
memory_region_add_subregion(&s->io_mmio_window, 0, &s->io_mmio);
memory_region_add_subregion(&s->io_ioport_window, 0, &s->io_ioport);
sysbus_init_mmio(sbd, &s->io_mmio_window);
sysbus_init_mmio(sbd, &s->io_ioport_window);
} else {
sysbus_init_mmio(sbd, &s->io_mmio);
sysbus_init_mmio(sbd, &s->io_ioport);
}
for (i = 0; i < GPEX_NUM_IRQS; i++) {
sysbus_init_irq(sbd, &s->irq[i]);
s->irq_num[i] = -1;
}
pci->bus = pci_register_root_bus(dev, "pcie.0", gpex_set_irq,
pci_swizzle_map_irq_fn, s, &s->io_mmio,
&s->io_ioport, 0, 4, TYPE_PCIE_BUS);
pci_bus_set_route_irq_fn(pci->bus, gpex_route_intx_pin_to_irq);
qdev_realize(DEVICE(&s->gpex_root), BUS(pci->bus), &error_fatal);
}
static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
PCIBus *rootbus)
{
return "0000:00";
}
static Property gpex_host_properties[] = {
/*
* Permit CPU accesses to unmapped areas of the PIO and MMIO windows
* (discarding writes and returning -1 for reads) rather than aborting.
*/
DEFINE_PROP_BOOL("allow-unmapped-accesses", GPEXHost,
allow_unmapped_accesses, true),
DEFINE_PROP_END_OF_LIST(),
};
static void gpex_host_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
hc->root_bus_path = gpex_host_root_bus_path;
dc->realize = gpex_host_realize;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->fw_name = "pci";
device_class_set_props(dc, gpex_host_properties);
}
static void gpex_host_initfn(Object *obj)
{
GPEXHost *s = GPEX_HOST(obj);
GPEXRootState *root = &s->gpex_root;
qom: Less verbose object_initialize_child() All users of object_initialize_child() pass the obvious child size argument. Almost all pass &error_abort and no properties. Tiresome. Rename object_initialize_child() to object_initialize_child_with_props() to free the name. New convenience wrapper object_initialize_child() automates the size argument, and passes &error_abort and no properties. Rename object_initialize_childv() to object_initialize_child_with_propsv() for consistency. Convert callers with this Coccinelle script: @@ expression parent, propname, type; expression child, size; symbol error_abort; @@ - object_initialize_child(parent, propname, OBJECT(child), size, type, &error_abort, NULL) + object_initialize_child(parent, propname, child, size, type, &error_abort, NULL) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, child, sizeof(*child), type, &error_abort, NULL) + object_initialize_child(parent, propname, child, type) @@ expression parent, propname, type; expression child; symbol error_abort; @@ - object_initialize_child(parent, propname, &child, sizeof(child), type, &error_abort, NULL) + object_initialize_child(parent, propname, &child, type) @@ expression parent, propname, type; expression child, size, err; expression list props; @@ - object_initialize_child(parent, propname, child, size, type, err, props) + object_initialize_child_with_props(parent, propname, child, size, type, err, props) Note that Coccinelle chokes on ARMSSE typedef vs. macro in hw/arm/armsse.c. Worked around by temporarily renaming the macro for the spatch run. Signed-off-by: Markus Armbruster <armbru@redhat.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> [Rebased: machine opentitan is new (commit fe0fe4735e7)] Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200610053247.1583243-37-armbru@redhat.com>
2020-06-10 07:32:25 +02:00
object_initialize_child(obj, "gpex_root", root, TYPE_GPEX_ROOT_DEVICE);
qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(root), "multifunction", false);
}
static const TypeInfo gpex_host_info = {
.name = TYPE_GPEX_HOST,
.parent = TYPE_PCIE_HOST_BRIDGE,
.instance_size = sizeof(GPEXHost),
.instance_init = gpex_host_initfn,
.class_init = gpex_host_class_init,
};
/****************************************************************************
* GPEX Root D0:F0
*/
static const VMStateDescription vmstate_gpex_root = {
.name = "gpex_root",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState),
VMSTATE_END_OF_LIST()
}
};
static void gpex_root_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->desc = "QEMU generic PCIe host bridge";
dc->vmsd = &vmstate_gpex_root;
k->vendor_id = PCI_VENDOR_ID_REDHAT;
k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST;
k->revision = 0;
k->class_id = PCI_CLASS_BRIDGE_HOST;
/*
* PCI-facing part of the host bridge, not usable without the
* host-facing part, which can't be device_add'ed, yet.
*/
qdev: Replace cannot_instantiate_with_device_add_yet with !user_creatable cannot_instantiate_with_device_add_yet was introduced by commit efec3dd631d94160288392721a5f9c39e50fb2bc to replace no_user. It was supposed to be a temporary measure. When it was introduced, we had 54 cannot_instantiate_with_device_add_yet=true lines in the code. Today (3 years later) this number has not shrunk: we now have 57 cannot_instantiate_with_device_add_yet=true lines. I think it is safe to say it is not a temporary measure, and we won't see the flag go away soon. Instead of a long field name that misleads people to believe it is temporary, replace it a shorter and less misleading field: user_creatable. Except for code comments, changes were generated using the following Coccinelle patch: @@ expression DC; @@ ( -DC->cannot_instantiate_with_device_add_yet = false; +DC->user_creatable = true; | -DC->cannot_instantiate_with_device_add_yet = true; +DC->user_creatable = false; ) @@ typedef ObjectClass; expression dc; identifier class, data; @@ static void device_class_init(ObjectClass *class, void *data) { ... dc->hotpluggable = true; +dc->user_creatable = true; ... } @@ @@ struct DeviceClass { ... -bool cannot_instantiate_with_device_add_yet; +bool user_creatable; ... } @@ expression DC; @@ ( -!DC->cannot_instantiate_with_device_add_yet +DC->user_creatable | -DC->cannot_instantiate_with_device_add_yet +!DC->user_creatable ) Cc: Alistair Francis <alistair.francis@xilinx.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Marcel Apfelbaum <marcel@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Thomas Huth <thuth@redhat.com> Acked-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Marcel Apfelbaum <marcel@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170503203604.31462-2-ehabkost@redhat.com> [ehabkost: kept "TODO remove once we're there" comment] Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-05-03 22:35:44 +02:00
dc->user_creatable = false;
}
static const TypeInfo gpex_root_info = {
.name = TYPE_GPEX_ROOT_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(GPEXRootState),
.class_init = gpex_root_class_init,
pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices Add INTERFACE_CONVENTIONAL_PCI_DEVICE to all direct subtypes of TYPE_PCI_DEVICE, except: 1) The ones that already have INTERFACE_PCIE_DEVICE set: * base-xhci * e1000e * nvme * pvscsi * vfio-pci * virtio-pci * vmxnet3 2) base-pci-bridge Not all PCI bridges are Conventional PCI devices, so INTERFACE_CONVENTIONAL_PCI_DEVICE is added only to the subtypes that are actually Conventional PCI: * dec-21154-p2p-bridge * i82801b11-bridge * pbm-bridge * pci-bridge The direct subtypes of base-pci-bridge not touched by this patch are: * xilinx-pcie-root: Already marked as PCIe-only. * pcie-pci-bridge: Already marked as PCIe-only. * pcie-port: all non-abstract subtypes of pcie-port are already marked as PCIe-only devices. 3) megasas-base Not all megasas devices are Conventional PCI devices, so the interface names are added to the subclasses registered by megasas_register_types(), according to information in the megasas_devices[] array. "megasas-gen2" already implements INTERFACE_PCIE_DEVICE, so add INTERFACE_CONVENTIONAL_PCI_DEVICE only to "megasas". Acked-by: Alberto Garcia <berto@igalia.com> Acked-by: John Snow <jsnow@redhat.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-09-27 21:56:34 +02:00
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ },
},
};
static void gpex_register(void)
{
type_register_static(&gpex_root_info);
type_register_static(&gpex_host_info);
}
type_init(gpex_register)