Re: [Xen-devel] [PATCH v1 0/2] libxl: add PV display device driver interface

[Oleksandr Grytsov <al1img@xxxxxxxxx>]

Hi All,

Here is configuration proposal with connector (surface) id:

1. Configuration file:
vdispl = [ 'backend=0, devId=0, beAlloc=1,
connectors=id0:800x600;id1:1024x768' ]

    * backend - backend domain id or name (if different from dom 0);
    * devId - device id (if different from 0);
    * beAlloc - indicated where to allocate buffers (according to protocol [1]);
    * connectors - list of available connectors: each connector
description consists of
      string id and resolution separated by colon:
        * id0, id1 - unique connector id. It is string which may contain:
            - uppercase [A-Z] and lowercase [a-z] English alphabet characters;
            - digits 0-9;
            - special symbols except: space : ; , ' "
        * 800x600, 1024x768 - connectors resolutions.

2. libxl_types.idl:

libxl_connector_param = Struct("connector_param", [
    ("id", string),
    ("width", uint32),
    ("height", uint32)
    ])

libxl_device_vdispl = Struct("device_vdispl", [
    ("backend_domid", libxl_domid),
    ("backend_domname", string),
    ("devid", libxl_devid),
    ("be_alloc", bool),
    ("connectors", Array(libxl_connector_param, "num_connectors"))
    ])

libxl_connectorinfo = Struct("connectorinfo", [
    ("id", string),
    ("width", uint32),
    ("height", uint32),
    ("evtch", integer),
    ("rref", integer),
    ], dir=DIR_OUT)

libxl_vdisplinfo = Struct("vdisplinfo", [
    ("backend", string),
    ("backend_id", uint32),
    ("frontend", string),
    ("frontend_id", uint32),
    ("devid", libxl_devid),
    ("state", integer),
    ("be_alloc", bool),
    ("connectors", Array(libxl_connectorinfo, "num_connectors"))
    ], dir=DIR_OUT)

3. xl command line:

    { "vdispl-attach",
      &main_vdisplattach, 1, 1,
      "Create a new virtual display device",
      "<Domain> [devId=<Device>] [backend=<BackDomain>] [beAlloc=<BackAlloc>]"\
      " [connectors=<Connectors>]",
      "    BackAlloc - set to 1 to allow backend allocated display buffers\n"
      "    Connectors - list of connector's description in ID:WxH format,\n"
      "    Where: ID - unique connector ID, W - connector width, H -
connector height:\n"
      "         id0:800x600;id1:1024x768"
    },
    { "vdispl-list",
      &main_vdispllist, 0, 0,
      "List virtual display devices for a domain",
      "<Domain(s)>",
    },
    { "vdispl-detach",
      &main_vdispldetach, 0, 1,
      "Destroy a domain's virtual display device",
      "<Domain> <DevId>",
    },

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