Re: [Qemu-devel] [PATCH 57/61] virtio : remove the function pointer.

[Blue Swirl]

On Mon, Jan 7, 2013 at 6:41 PM,  <address@hidden> wrote:
> From: KONRAD Frederic <address@hidden>
>
> This remove the function pointer in VirtIODevice, and use only
> VirtioDeviceClass function pointer. It should be applied after all
> the device have been refactored.
>
> Signed-off-by: KONRAD Frederic <address@hidden>
> ---
>  hw/9pfs/virtio-9p-device.c |  2 --
>  hw/virtio-balloon.c        |  8 --------
>  hw/virtio-blk.c            |  5 -----
>  hw/virtio-net.c            |  7 -------
>  hw/virtio-pci.c            |  2 +-
>  hw/virtio-rng.c            |  6 ------
>  hw/virtio-scsi.c           |  6 ------
>  hw/virtio-serial-bus.c     |  6 ------
>  hw/virtio.c                | 41 ++++++++++++++++++++++++++---------------
>  hw/virtio.h                | 11 -----------
>  10 files changed, 27 insertions(+), 67 deletions(-)
>
> diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
> index a99ff5a..17be320 100644
> --- a/hw/9pfs/virtio-9p-device.c
> +++ b/hw/9pfs/virtio-9p-device.c
> @@ -102,9 +102,7 @@ static int virtio_9p_device_init(VirtIODevice *vdev)
>      s->ctx.uid = -1;
>
>      s->ops = fse->ops;
> -    vdev->get_features = virtio_9p_get_features;
>      s->config_size = sizeof(struct virtio_9p_config) + len;
> -    vdev->get_config = virtio_9p_get_config;
>      s->fid_list = NULL;
>      qemu_co_rwlock_init(&s->rename_lock);
>
> diff --git a/hw/virtio-balloon.c b/hw/virtio-balloon.c
> index e2cb2fc..40d3c15 100644
> --- a/hw/virtio-balloon.c
> +++ b/hw/virtio-balloon.c
> @@ -227,14 +227,6 @@ static int virtio_balloon_device_init(VirtIODevice *vdev)
>
>      virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON, 8);
>
> -    /*
> -     * This will disappear later in the serie.
> -     * We will use VirtioDeviceClass instead.
> -     */
> -    vdev->get_config = virtio_balloon_get_config;
> -    vdev->set_config = virtio_balloon_set_config;
> -    vdev->get_features = virtio_balloon_get_features;
> -
>      ret = qemu_add_balloon_handler(virtio_balloon_to_target,
>                                     virtio_balloon_stat, s);
>
> diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
> index 74ba97b..14e4543 100644
> --- a/hw/virtio-blk.c
> +++ b/hw/virtio-blk.c
> @@ -651,11 +651,6 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
>      virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
>                  sizeof(struct virtio_blk_config));
>
> -    vdev->get_config = virtio_blk_update_config;
> -    vdev->set_config = virtio_blk_set_config;
> -    vdev->get_features = virtio_blk_get_features;
> -    vdev->set_status = virtio_blk_set_status;
> -    vdev->reset = virtio_blk_reset;
>      s->bs = blk->conf.bs;
>      s->conf = &blk->conf;
>      memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf));
> diff --git a/hw/virtio-net.c b/hw/virtio-net.c
> index 7f87166..3ae0d79 100644
> --- a/hw/virtio-net.c
> +++ b/hw/virtio-net.c
> @@ -999,13 +999,6 @@ static int virtio_net_device_init(VirtIODevice *vdev)
>      virtio_init(VIRTIO_DEVICE(n), "virtio-net", VIRTIO_ID_NET,
>                                    sizeof(struct virtio_net_config));
>
> -    vdev->get_config = virtio_net_get_config;
> -    vdev->set_config = virtio_net_set_config;
> -    vdev->get_features = virtio_net_get_features;
> -    vdev->set_features = virtio_net_set_features;
> -    vdev->bad_features = virtio_net_bad_features;
> -    vdev->reset = virtio_net_reset;
> -    vdev->set_status = virtio_net_set_status;
>      n->rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
>
>      if (n->net_conf.tx && strcmp(n->net_conf.tx, "timer") &&
> diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
> index 0e45b1a..c47b9b1 100644
> --- a/hw/virtio-pci.c
> +++ b/hw/virtio-pci.c
> @@ -276,7 +276,7 @@ static void virtio_ioport_write(void *opaque, uint32_t 
> addr, uint32_t val)
>      case VIRTIO_PCI_GUEST_FEATURES:
>         /* Guest does not negotiate properly?  We have to assume nothing. */
>         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
> -            val = vdev->bad_features ? vdev->bad_features(vdev) : 0;
> +            val = virtio_device_get_bad_features(proxy->bus);
>         }
>          virtio_set_features(vdev, val);
>          break;
> diff --git a/hw/virtio-rng.c b/hw/virtio-rng.c
> index 67407a7..57e0dae 100644
> --- a/hw/virtio-rng.c
> +++ b/hw/virtio-rng.c
> @@ -173,12 +173,6 @@ static int virtio_rng_device_init(VirtIODevice *vdev)
>      }
>
>      vrng->vq = virtio_add_queue(vdev, 8, handle_input);
> -    /*
> -     * This will disappear later in the serie.
> -     * We will use VirtioDeviceClass instead.
> -     */
> -    vdev->get_features = get_features;
> -    /**/
>
>      assert(vrng->conf.max_bytes <= INT64_MAX);
>      vrng->quota_remaining = vrng->conf.max_bytes;
> diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c
> index 273ca69..0e43230 100644
> --- a/hw/virtio-scsi.c
> +++ b/hw/virtio-scsi.c
> @@ -705,12 +705,6 @@ static int virtio_scsi_device_init(VirtIODevice *vdev)
>
>      s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *));
>
> -    /* TODO set up vdev function pointers */
> -    vdev->get_config = virtio_scsi_get_config;
> -    vdev->set_config = virtio_scsi_set_config;
> -    vdev->get_features = virtio_scsi_get_features;
> -    vdev->reset = virtio_scsi_reset;
> -
>      s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
>                                    virtio_scsi_handle_ctrl);
>      s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
> diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> index d1f47a4..ef74c26 100644
> --- a/hw/virtio-serial-bus.c
> +++ b/hw/virtio-serial-bus.c
> @@ -972,12 +972,6 @@ static int virtio_serial_device_init(VirtIODevice *vdev)
>       */
>      mark_port_added(vser, 0);
>
> -    vdev->get_features = get_features;
> -    vdev->get_config = get_config;
> -    vdev->set_config = set_config;
> -    vdev->set_status = set_status;
> -    vdev->reset = vser_reset;
> -
>      vser->post_load = NULL;
>
>      /*
> diff --git a/hw/virtio.c b/hw/virtio.c
> index ca170c3..d72b84a 100644
> --- a/hw/virtio.c
> +++ b/hw/virtio.c
> @@ -517,10 +517,11 @@ void virtio_update_irq(VirtIODevice *vdev)
>
>  void virtio_set_status(VirtIODevice *vdev, uint8_t val)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      trace_virtio_set_status(vdev, val);
>
> -    if (vdev->set_status) {
> -        vdev->set_status(vdev, val);
> +    if (k->set_status) {
> +        k->set_status(vdev, val);
>      }
>      vdev->status = val;
>  }
> @@ -528,12 +529,14 @@ void virtio_set_status(VirtIODevice *vdev, uint8_t val)
>  void virtio_reset(void *opaque)
>  {
>      VirtIODevice *vdev = opaque;
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      int i;
>
>      virtio_set_status(vdev, 0);
>
> -    if (vdev->reset)
> -        vdev->reset(vdev);
> +    if (k->reset) {
> +        k->reset(vdev);
> +    }
>
>      vdev->guest_features = 0;
>      vdev->queue_sel = 0;
> @@ -557,9 +560,10 @@ void virtio_reset(void *opaque)
>
>  uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint8_t val;
>
> -    vdev->get_config(vdev, vdev->config);
> +    k->get_config(vdev, vdev->config);
>
>      if (addr > (vdev->config_len - sizeof(val)))
>          return (uint32_t)-1;
> @@ -570,9 +574,10 @@ uint32_t virtio_config_readb(VirtIODevice *vdev, 
> uint32_t addr)
>
>  uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint16_t val;
>
> -    vdev->get_config(vdev, vdev->config);
> +    k->get_config(vdev, vdev->config);
>
>      if (addr > (vdev->config_len - sizeof(val)))
>          return (uint32_t)-1;
> @@ -583,9 +588,10 @@ uint32_t virtio_config_readw(VirtIODevice *vdev, 
> uint32_t addr)
>
>  uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint32_t val;
>
> -    vdev->get_config(vdev, vdev->config);
> +    k->get_config(vdev, vdev->config);
>
>      if (addr > (vdev->config_len - sizeof(val)))
>          return (uint32_t)-1;
> @@ -596,6 +602,7 @@ uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t 
> addr)
>
>  void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint8_t val = data;
>
>      if (addr > (vdev->config_len - sizeof(val)))
> @@ -603,12 +610,13 @@ void virtio_config_writeb(VirtIODevice *vdev, uint32_t 
> addr, uint32_t data)
>
>      stb_p(vdev->config + addr, val);
>
> -    if (vdev->set_config)
> -        vdev->set_config(vdev, vdev->config);
> +    if (k->set_config)

Still this one...

> +        k->set_config(vdev, vdev->config);
>  }
>
>  void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint16_t val = data;
>
>      if (addr > (vdev->config_len - sizeof(val)))
> @@ -616,12 +624,13 @@ void virtio_config_writew(VirtIODevice *vdev, uint32_t 
> addr, uint32_t data)
>
>      stw_p(vdev->config + addr, val);
>
> -    if (vdev->set_config)
> -        vdev->set_config(vdev, vdev->config);
> +    if (k->set_config)

and here the braces are missing.

> +        k->set_config(vdev, vdev->config);
>  }
>
>  void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint32_t val = data;
>
>      if (addr > (vdev->config_len - sizeof(val)))
> @@ -629,8 +638,9 @@ void virtio_config_writel(VirtIODevice *vdev, uint32_t 
> addr, uint32_t data)
>
>      stl_p(vdev->config + addr, val);
>
> -    if (vdev->set_config)
> -        vdev->set_config(vdev, vdev->config);
> +    if (k->set_config) {
> +        k->set_config(vdev, vdev->config);
> +    }
>  }
>
>  void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr)
> @@ -799,13 +809,14 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
>
>  int virtio_set_features(VirtIODevice *vdev, uint32_t val)
>  {
> +    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
>      uint32_t supported_features =
>          vdev->binding->get_features(vdev->binding_opaque);
>      bool bad = (val & ~supported_features) != 0;
>
>      val &= supported_features;
> -    if (vdev->set_features) {
> -        vdev->set_features(vdev, val);
> +    if (k->set_features) {
> +        k->set_features(vdev, val);
>      }
>      vdev->guest_features = val;
>      return bad ? -1 : 0;
> diff --git a/hw/virtio.h b/hw/virtio.h
> index c134960..fbbf8e8 100644
> --- a/hw/virtio.h
> +++ b/hw/virtio.h
> @@ -128,17 +128,6 @@ struct VirtIODevice
>      void *config;
>      uint16_t config_vector;
>      int nvectors;
> -    /*
> -     * Function pointers will be removed ( at the end of the series )
> -     * as they are in VirtioDeviceClass.
> -     */
> -    uint32_t (*get_features)(VirtIODevice *vdev, uint32_t 
> requested_features);
> -    uint32_t (*bad_features)(VirtIODevice *vdev);
> -    void (*set_features)(VirtIODevice *vdev, uint32_t val);
> -    void (*get_config)(VirtIODevice *vdev, uint8_t *config);
> -    void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
> -    void (*reset)(VirtIODevice *vdev);
> -    void (*set_status)(VirtIODevice *vdev, uint8_t val);
>      VirtQueue *vq;
>      const VirtIOBindings *binding;
>      DeviceState *binding_opaque;
> --
> 1.7.11.7
>
>