[Spice-devel] [PATCH spice-protocol 2/8 v2] Add the StreamMsgGraphicsDeviceInfo message

[Frediano Ziglio]

> 
> The message contains information about the graphics device and monitor
> belonging to a particular video stream (which maps to a channel) from
> the streaming agent.
> 
> Signed-off-by: Lukáš Hrázký <lhrazky at redhat.com>

Acked-by: Frediano Ziglio <fziglio at redhat.com>

> ---
>  spice/stream-device.h | 31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/spice/stream-device.h b/spice/stream-device.h
> index 6add42b..c70690a 100644
> --- a/spice/stream-device.h
> +++ b/spice/stream-device.h
> @@ -90,6 +90,8 @@ typedef enum StreamMsgType {
>      STREAM_TYPE_CURSOR_SET,
>      /* guest cursor position */
>      STREAM_TYPE_CURSOR_MOVE,
> +    /* the graphics device display information message (device address and
> display id) */
> +    STREAM_TYPE_DEVICE_DISPLAY_INFO,
>  } StreamMsgType;
>  
>  typedef enum StreamCapabilities {
> @@ -140,6 +142,35 @@ typedef struct StreamMsgData {
>      uint8_t data[0];
>  } StreamMsgData;
>  
> +/* This message contains information about the graphics device and monitor
> + * belonging to a particular video stream (which maps to a channel) from
> + * the streaming agent.
> + *
> + * The device_address is the hardware address of the device (e.g. PCI),
> + * device_display_id is the id of the monitor on the device.
> + *
> + * The supported device address format is:
> + * "pci/<DOMAIN>/<SLOT>.<FUNCTION>/.../<SLOT>.<FUNCTION>"
> + *
> + * The "pci" identifies the rest of the string as a PCI address. It is the
> only
> + * supported address at the moment, other identifiers can be introduced
> later.
> + * <DOMAIN> is the PCI domain, followed by <SLOT>.<FUNCTION> of any PCI
> bridges
> + * in the chain leading to the device. The last <SLOT>.<FUNCTION> is the
> + * graphics device. All of <DOMAIN>, <SLOT>, <FUNCTION> are hexadecimal
> numbers
> + * with the following number of digits:
> + *   <DOMAIN>: 4
> + *   <SLOT>: 2
> + *   <FUNCTION>: 1
> + *
> + * Sent from the streaming agent to the server.
> + */
> +typedef struct StreamMsgDeviceDisplayInfo {
> +    uint32_t stream_id;
> +    uint32_t device_display_id;
> +    uint32_t device_address_len;
> +    uint8_t device_address[0];  // a zero-terminated string
> +} StreamMsgDeviceDisplayInfo;
> +

Curiosity: is there a reason why this message was not added at the end
of the header?

>  /* Tell to stop current stream and possibly start a new one.
>   * This message is sent by the host to the guest.
>   * Allows to communicate the codecs supported by the clients.

Frediano