diff options
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 2e37bfc89655..ccde0a41209a 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -275,41 +275,62 @@ static u32 vp_generation(struct virtio_device *vdev) return vp_ioread8(&cfg->config_generation); } +/* + * vp_modern_get_status - get the device status + * @mdev: the modern virtio-pci device + * + * Returns the status read from device + */ +static u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev) +{ + struct virtio_pci_common_cfg __iomem *cfg = mdev->common; + + return vp_ioread8(&cfg->device_status); +} + /* config->{get,set}_status() implementations */ static u8 vp_get_status(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); - struct virtio_pci_modern_device *mdev = &vp_dev->mdev; + + return vp_modern_get_status(&vp_dev->mdev); +} + +/* + * vp_modern_set_status - set status to device + * @mdev: the modern virtio-pci device + * @status: the status set to device + */ +static void vp_modern_set_status(struct virtio_pci_modern_device *mdev, + u8 status) +{ struct virtio_pci_common_cfg __iomem *cfg = mdev->common; - return vp_ioread8(&cfg->device_status); + vp_iowrite8(status, &cfg->device_status); } static void vp_set_status(struct virtio_device *vdev, u8 status) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); - struct virtio_pci_modern_device *mdev = &vp_dev->mdev; - struct virtio_pci_common_cfg __iomem *cfg = mdev->common; /* We should never be setting status to 0. */ BUG_ON(status == 0); - vp_iowrite8(status, &cfg->device_status); + vp_modern_set_status(&vp_dev->mdev, status); } static void vp_reset(struct virtio_device *vdev) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); struct virtio_pci_modern_device *mdev = &vp_dev->mdev; - struct virtio_pci_common_cfg __iomem *cfg = mdev->common; /* 0 status means a reset. */ - vp_iowrite8(0, &cfg->device_status); + vp_modern_set_status(mdev, 0); /* After writing 0 to device_status, the driver MUST wait for a read of * device_status to return 0 before reinitializing the device. * This will flush out the status write, and flush in device writes, * including MSI-X interrupts, if any. */ - while (vp_ioread8(&cfg->device_status)) + while (vp_modern_get_status(mdev)) msleep(1); /* Flush pending VQ/configuration callbacks. */ vp_synchronize_vectors(vdev); |