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vfio-user: find and init PCI device

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Find the PCI device with specified id. Initialize the device context
with the QEMU PCI device

Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 7798dbd730099b33fdd00c4c202cfe79e5c5c151.1655151679.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jagannathan Raman 2022-06-13 16:26:27 -04:00 committed by Stefan Hajnoczi
parent 87f7249ff6
commit a6e8d6d98e
1 changed files with 67 additions and 0 deletions
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67
hw/remote/vfio-user-obj.c
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@ -43,6 +43,8 @@
#include "qemu/notify.h"
#include "sysemu/sysemu.h"
#include "libvfio-user.h"
#include "hw/qdev-core.h"
#include "hw/pci/pci.h"
#define TYPE_VFU_OBJECT "x-vfio-user-server"
OBJECT_DECLARE_TYPE(VfuObject, VfuObjectClass, VFU_OBJECT)
@ -80,6 +82,10 @@ struct VfuObject {
Notifier machine_done;
vfu_ctx_t *vfu_ctx;
PCIDevice *pci_dev;
Error *unplug_blocker;
};
static void vfu_object_init_ctx(VfuObject *o, Error **errp);
@ -181,6 +187,9 @@ static void vfu_object_machine_done(Notifier *notifier, void *data)
static void vfu_object_init_ctx(VfuObject *o, Error **errp)
{
ERRP_GUARD();
DeviceState *dev = NULL;
vfu_pci_type_t pci_type = VFU_PCI_TYPE_CONVENTIONAL;
int ret;
if (o->vfu_ctx || !o->socket || !o->device ||
!phase_check(PHASE_MACHINE_READY)) {
@ -199,6 +208,53 @@ static void vfu_object_init_ctx(VfuObject *o, Error **errp)
error_setg(errp, "vfu: Failed to create context - %s", strerror(errno));
return;
}
dev = qdev_find_recursive(sysbus_get_default(), o->device);
if (dev == NULL) {
error_setg(errp, "vfu: Device %s not found", o->device);
goto fail;
}
if (!object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
error_setg(errp, "vfu: %s not a PCI device", o->device);
goto fail;
}
o->pci_dev = PCI_DEVICE(dev);
object_ref(OBJECT(o->pci_dev));
if (pci_is_express(o->pci_dev)) {
pci_type = VFU_PCI_TYPE_EXPRESS;
}
ret = vfu_pci_init(o->vfu_ctx, pci_type, PCI_HEADER_TYPE_NORMAL, 0);
if (ret < 0) {
error_setg(errp,
"vfu: Failed to attach PCI device %s to context - %s",
o->device, strerror(errno));
goto fail;
}
error_setg(&o->unplug_blocker,
"vfu: %s for %s must be deleted before unplugging",
TYPE_VFU_OBJECT, o->device);
qdev_add_unplug_blocker(DEVICE(o->pci_dev), o->unplug_blocker);
return;
fail:
vfu_destroy_ctx(o->vfu_ctx);
if (o->unplug_blocker && o->pci_dev) {
qdev_del_unplug_blocker(DEVICE(o->pci_dev), o->unplug_blocker);
error_free(o->unplug_blocker);
o->unplug_blocker = NULL;
}
if (o->pci_dev) {
object_unref(OBJECT(o->pci_dev));
o->pci_dev = NULL;
}
o->vfu_ctx = NULL;
}
static void vfu_object_init(Object *obj)
@ -241,6 +297,17 @@ static void vfu_object_finalize(Object *obj)
o->device = NULL;
if (o->unplug_blocker && o->pci_dev) {
qdev_del_unplug_blocker(DEVICE(o->pci_dev), o->unplug_blocker);
error_free(o->unplug_blocker);
o->unplug_blocker = NULL;
}
if (o->pci_dev) {
object_unref(OBJECT(o->pci_dev));
o->pci_dev = NULL;
}
if (!k->nr_devs && vfu_object_auto_shutdown()) {
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}