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usb_drv: change Usb session and raw driver

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- Use 'label' attribute to identify device instead of
  bus/dev and vendor_id/product_id

- Implement release_interface RPC

- Report 'label' as well as 'bus' and 'dev'

- Add policy handling to raw driver (includes reconfiguration
  at runtime)

- Use own memory backing store for large DMA allocations

Issue #1863.
This commit is contained in:
Sebastian Sumpf
2016-01-06 14:43:21 +01:00
committed by Christian Helmuth
parent 3daa8a3d04
commit 716eab21e3
10 changed files with 244 additions and 67 deletions
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repos/dde_linux/README
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@@ -208,17 +208,46 @@ Configuration snippet:
! </config>
!</start>
The optional 'devices' report lists the connected devices and gets updated when devices are added or removed.
The optional 'devices' report lists the connected devices and gets updated
when devices are added or removed.
Example report:
<devices>
<device vendor_id="0x17ef" product_id="0x4816"/>
<device vendor_id="0x0a5c" product_id="0x217f"/>
<device vendor_id="0x8087" product_id="0x0020"/>
<device vendor_id="0x8087" product_id="0x0020"/>
<device vendor_id="0x1d6b" product_id="0x0002"/>
<device vendor_id="0x1d6b" product_id="0x0002"/>
</devices>
!<devices>
! <device label="usb-1-7" vendor_id="0x1f75" product_id="0x0917" bus="0x0001" dev="0x0007"/>
! <device label="usb-1-6" vendor_id="0x13fe" product_id="0x5200" bus="0x0001" dev="0x0006"/>
! <device label="usb-1-4" vendor_id="0x17ef" product_id="0x4816" bus="0x0001" dev="0x0004"/>
! <device label="usb-1-3" vendor_id="0x0a5c" product_id="0x217f" bus="0x0001" dev="0x0003"/>
! <device label="usb-2-2" vendor_id="0x8087" product_id="0x0020" bus="0x0002" dev="0x0002"/>
! <device label="usb-1-2" vendor_id="0x8087" product_id="0x0020" bus="0x0001" dev="0x0002"/>
! <device label="usb-2-1" vendor_id="0x1d6b" product_id="0x0002" bus="0x0002" dev="0x0001"/>
! <device label="usb-1-1" vendor_id="0x1d6b" product_id="0x0002" bus="0x0001" dev="0x0001"/>
!</devices>
There is no distinction yet for multiple devices of the same type.
For every device a unique identifier is generated that is used to access the
USB device. Only devices that have a valid policy configured at the USB driver
can be accessed by a client. The following configuration allows 'comp1' to
access the device 'usb-1-6':
!<start name="usb_drv">
! <resource name="RAM" quantum="8M"/>
! <provides><service name="Usb"/></provides>
! <config uhci="yes" ehci="yes" xhci="yes">
! <raw>
! <report devices="yes"/>
! <policy label="comp1 -> usb-1-6" vendor_id="0x13fe" product_id="0x5200" bus="0x0001" dev="0x0006"/>
! </raw>
! </config>
!</start>
In addition to the mandatory 'label' attribute the policy node also
contains optional attribute tuples of which at least one has to be present.
The 'vendor_id' and 'product_id' tuple selects a device regardless of its
location on the USB bus and is mostly used in static configurations. The
'bus' and 'dev' tuple selects a specific device via its bus locations and
device address. It is mostly used in dynamic configurations because the device
address is not fixed and may change every time the same device is plugged in.
The configuration of the USB driver can be changed at runtime to satisfy
dynamic configurations or rather policies when using the 'Usb' session
interface.