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vfio/pci: Extract out a helper vfio_pci_get_pci_hot_reset_info 

This helper will be used by both legacy and iommufd backends.

No functional changes intended.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
master
Zhenzhong Duan 2023-11-21 16:44:06 +08:00 committed by Cédric Le Goater
parent 714e9affa8
commit 4d36ec23a7
2 changed files with 44 additions and 21 deletions
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62
hw/vfio/pci.c
View File

@ -2445,10 +2445,48 @@ static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
return (strcmp(tmp, name) == 0);
}
int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
struct vfio_pci_hot_reset_info **info_p)
{
struct vfio_pci_hot_reset_info *info;
int ret, count;
assert(info_p && !*info_p);
info = g_malloc0(sizeof(*info));
info->argsz = sizeof(*info);
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
if (ret && errno != ENOSPC) {
ret = -errno;
g_free(info);
if (!vdev->has_pm_reset) {
error_report("vfio: Cannot reset device %s, "
"no available reset mechanism.", vdev->vbasedev.name);
}
return ret;
}
count = info->count;
info = g_realloc(info, sizeof(*info) + (count * sizeof(info->devices[0])));
info->argsz = sizeof(*info) + (count * sizeof(info->devices[0]));
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
if (ret) {
ret = -errno;
g_free(info);
error_report("vfio: hot reset info failed: %m");
return ret;
}
*info_p = info;
return 0;
}
static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
{
VFIOGroup *group;
struct vfio_pci_hot_reset_info *info;
struct vfio_pci_hot_reset_info *info = NULL;
struct vfio_pci_dependent_device *devices;
struct vfio_pci_hot_reset *reset;
int32_t *fds;
@ -2462,30 +2500,12 @@ static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
}
vdev->vbasedev.needs_reset = false;
info = g_malloc0(sizeof(*info));
info->argsz = sizeof(*info);
ret = vfio_pci_get_pci_hot_reset_info(vdev, &info);
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
if (ret && errno != ENOSPC) {
ret = -errno;
if (!vdev->has_pm_reset) {
error_report("vfio: Cannot reset device %s, "
"no available reset mechanism.", vdev->vbasedev.name);
}
goto out_single;
}
count = info->count;
info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
info->argsz = sizeof(*info) + (count * sizeof(*devices));
devices = &info->devices[0];
ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
if (ret) {
ret = -errno;
error_report("vfio: hot reset info failed: %m");
goto out_single;
}
devices = &info->devices[0];
trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);

3
hw/vfio/pci.h
View File

@ -218,6 +218,9 @@ void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr);
extern const PropertyInfo qdev_prop_nv_gpudirect_clique;
int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
struct vfio_pci_hot_reset_info **info_p);
int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);
int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,