8fbab3b62a
Introduces a new Xen PV PCI device which will act as a binding point for PV drivers for Xen. The device has parameterized vendor-id, device-id and revision to allow to be configured as a binding point for any vendor's PV drivers. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Andreas Färber <afaerber@suse.de>
132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hw/hw.h"
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#include "hw/pci/pci.h"
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#include "trace.h"
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#define TYPE_XEN_PV_DEVICE "xen-pvdevice"
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#define XEN_PV_DEVICE(obj) \
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OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
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typedef struct XenPVDevice {
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/*< private >*/
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PCIDevice parent_obj;
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/*< public >*/
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uint16_t vendor_id;
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uint16_t device_id;
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uint8_t revision;
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uint32_t size;
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MemoryRegion mmio;
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} XenPVDevice;
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static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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trace_xen_pv_mmio_read(addr);
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return ~(uint64_t)0;
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}
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static void xen_pv_mmio_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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trace_xen_pv_mmio_write(addr);
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}
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static const MemoryRegionOps xen_pv_mmio_ops = {
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.read = &xen_pv_mmio_read,
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.write = &xen_pv_mmio_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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};
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static int xen_pv_init(PCIDevice *pci_dev)
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{
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XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
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uint8_t *pci_conf;
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pci_conf = pci_dev->config;
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pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
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pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
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pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
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pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
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pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
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pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
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pci_config_set_prog_interface(pci_conf, 0);
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pci_conf[PCI_INTERRUPT_PIN] = 1;
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memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
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"mmio", d->size);
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pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
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&d->mmio);
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return 0;
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}
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static Property xen_pv_props[] = {
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DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
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DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, PCI_DEVICE_ID_XEN_PVDEVICE),
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DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
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DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
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DEFINE_PROP_END_OF_LIST()
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};
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static void xen_pv_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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k->init = xen_pv_init;
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k->class_id = PCI_CLASS_SYSTEM_OTHER;
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dc->desc = "Xen PV Device";
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dc->props = xen_pv_props;
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}
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static const TypeInfo xen_pv_type_info = {
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.name = TYPE_XEN_PV_DEVICE,
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.parent = TYPE_PCI_DEVICE,
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.instance_size = sizeof(XenPVDevice),
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.class_init = xen_pv_class_init,
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};
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static void xen_pv_register_types(void)
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{
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type_register_static(&xen_pv_type_info);
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}
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type_init(xen_pv_register_types)
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