The driver falls in line with the previous 'legacy_wifi_drv' component
where the ported wireless LAN stack and device driver is encapsulated
in a library. This library in return is used by the 'Libc::Component'
providing the necessary environment for the 'wpa_supplicant'.
In constrast to the old driver a 'wifi' VFS plugin is in charge of
initalizing the 'Lx_kit::Env' prior to executing any static
constructors.
Fixes#4455.
Move 'linux-firmware' portion from 'dde_linux' into its own port,
while it is used by the upcoming new WLAN driver keep it in place
for the legacy one.
Issue #4455.
Various libraries, like libnl and wpa_driver_nl80211, used hardcoded
values for the interface index (ifindex) and name (ifname).
To accomdate the legacy as well as the upcoming new driver we add
functions to query these information where at least the index differs.
Issue #4455.
The location of the used 'source.list' file is hard-coded and will not
work when the ported driver is implemented as a shared library. For
this use-case provide means to set the location differently.
Issue #4455.
In case where the ported driver or protocol stack is executed from
an already managed environment, e.g. the libc, the execution
of the static constructors will be performed at the appropriate
time.
Issue #4455.
If any PCI device reports 0 as interrupt PIN, drivers may try to force
MSI setup (e.g., xhci). So, we clamp the interrupt PIN to 1 to let
drivers finish initialization and don't bother the platform driver.
This commit removes all physical notions from the information given
to the Linux kernel regarding PCI BARs.
With the exception for the host bridge that needs to be located at
'0:00.0' as required by the Intel FB driver, all other devices are
announced at the PCI BUS in an ascending order.
Additionally the MMIO regions start at 1 GiB and are capped at 32 bit
to prevent unnecessary access to 64 bit addresses.
.SHELLFLAGS is extended by option pipefail to make pipes fail if any pipe
element fails. As .SHELLFLAGS is exported into sub-make instances it
must be unexported before calling third-party build systems recursively.
To support device-less protocol-stacks only ports, we can use a
Virt I/O Linux kernel flavor, and export the lx_kit/lx_emul parts
not depending on platform API and devices.
Ref #4397
* Drivers have to use lx_kit/memory_dma.cc
* Protocol-stacks use lx_kit/memory_non_dma.cc
* Moreover the device-dependent lx_emul parts get removed
from the common lx_emul import rules
Fix#4443
* Unifies the declaration of callbacks which manage driver/client
shared dataspaces
* Move the Linux driver-specific callback implementation to the
lx_emul library from the PC's USB host driver
Fixgenodelabs/genode#4439
* Switch from the legacy usb_host driver to the new PC version
in recipes and automated tests
* Update documentation snippets
* Remove outdated, unused usb_rndis run-script
Fixgenodelabs/genode#4416
To make room for the re-newed usb_host_drv basing on Linux 5.14 and
the re-newed lx_kit/lx_emul we have to move the depot recipe and
consistently name the old drivers with a legacy_ prefix.
Ref genodelabs/genode#4416
The x86 platform driver uses a different API than the one for ARM for
which the lx_kit glue code was designed. Since the x86 platform driver
will eventually adopt a similar interface we implement a wrapper that
encapsulates the old interface.
Ref genodelabs/genode#4411
Until now, the lx_emul layer addressed a 5.11 Linux Kernel port,
now that we add new architectures it is better to update the default version
first. There are especially changes in the task_struct code,
and the signature of some functions in the paging subsystem changed.
Ref genodelabs/genode#4411
We use the architecture-specific setjmp/longjmp implementation without
modification in the newer lx_kit implementation as well. There is no
need for a duplication.
Ref genodelabs/genode#4411
This patch changes the 'Allocator' interface to the use of 'Attempt'
return values instead of using exceptions for propagating errors.
To largely uphold compatibility with components using the original
exception-based interface - in particluar use cases where an 'Allocator'
is passed to the 'new' operator - the traditional 'alloc' is still
supported. But it existes merely as a wrapper around the new
'try_alloc'.
Issue #4324
The Allocator_avl back end will display diagnostic messages if the
address to be freed is not at the beginning of a block. This happens
regulary when 'struct page' objects are not freed in allocation order.
Issue #4325.
Introduce a method to access the dataspace capability of the underlying
backing store for a memory allocation. This is necessary for drivers
where the memory is managed manually and the capability needs to be
given to a client.
Issue #4325.
This patch introduces the lx_emul/pin.h interface that enables GPIO stub
drivers to interact with Genode's Pin_control and IRQ sessions via a
simple C API.
Fixes#4316
To clearly identify the correct device use the unique device's name
not the type. Otherwise a driver cannot drive several devices of the
same type.
Fix#4297
This commit contains a backport of commit [1] that deals with updating
the event ring dequeue pointer more often to prevent unnecessary
'Event Ring Full' errors.
[1] 'usb: host: xhci: update event ring dequeue pointer on purpose'
(dc0ffbea5729a3abafa577ebfce87f18b79e294b)
Fixes#4296.
* Use the architecture-dependent minimal alignment for all allocations,
e.g. on ARM it is necessary to have cacheline aligned allocations for DMA
* Remove the allocation functions without alignment from generic API
* Fix a warning
Fix#4268
After a DMA transaction do only invalidate cachelines from the
corresponding DMA buffers if data got transfered from device to
CPU, and not vice versa. Otherwise it might result in data corruption.
Ref #4268
The lx_emul_virt_to_pages implementation initialized the page ref
counter only for the first page, leaving the remaining elements in
uninitialized state. This, in turn, rendered the Linux page_pool (as
used by the emac network driver) ineffective, ultimately leading the a
memory leak. The fix changes the call of 'init_page_count' to take the
loop variable as argument.
Issue #4225
Driver code such as mfd-core.c may pass 0 as argument n to kcalloc,
which eventually results in an allocation size 0.
res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
Since 'res' is checked against NULL for success, kmalloc must not return
a NULL pointer in this case. The patch works around this issue by
forcing an allocation size of 1 byte in this case.
Issue #4253
Clock providers such as drivers/clk/sunxi-ng/ccu-sun8i-r.c don't use
regular init calls but declare their init functions via CLK_OF_DECLARE,
which fill the __clk_of_table. Linux populates the table statically by
using special sections declared in the linker script. In contrast, we
populate the table by expanding the macro to global constructor
functions.
The __clk_of_table is then processed by the call of of_clk_init(NULL).
Issue #4253
The re-newed approach currently supports ARM 64-bit only.
It depends on the Platform API of the ARM architecture.
It tries to meet the original semantic of the Linux kernel
functions as far as possible. To achieve this, device drivers
using this library should reference the original Linux kernel
headers at foremost. Only the headers in `src/include/lx_emul/shadow`
have to shadow clone the original ones.
Fix#4225
skb_push() already increases the skb->len by ETH_HLEN, hence adding
ETH_HLEN to the packet_size is redundant.
A too large packet size becomes a problem for large MTUs. With a maximum
MTU of 1500, adding ETH_HLEN twice will lead to a packet size of 1528.
Since this is larger than what we expect for good-old Ethernet (max. 1522),
some clients (e.g. the e1000 model in vbox5) may drop these packets.
Fixesgenodelabs/genode#4228
Unfortunately, our current implementation of 'wmb()' doesn't seem to do what we
want it to do. On base-hw + imx6q_sabrelite, the write of bdp->cbd_sc seems to
get re-ordered after the write to txq->bd.reg_desc_active in the transmission
path of the contrib code. Due to this, the transmission of the packet is only
triggered the next time a packet is sent. However, we only quick-fix it by
enforcing the execution of the write with a volatile global read as we will
soon update the FEC NIC port with a new DDE approach anyway.
Fixes#4010
The wpa_supplicant refuses to set the BSSID in case it is quoted.
Removing the quotes allows for specifying the BSSID in the
configuration.
Fixes#4175.
- Do not perform desctruction on report updatea in EP because
'unregister_device' may block on Led state 'update' (synchronous
control message) leading to the driver being stuck because no more
signals are received
- Check if device is present in 'submit_urb' calls
fixes#4166
- Signal device ready depending on state (ready or not) immediately or
when "actconfig" is set
- Report new devices when ready
- Drain packet stream in case there is no device present (needed for
synchronous operations at client side)
- Do not use 'session_device' on device destruction, check pointer
directly instead
issue #4149
Comment in Linux sources:
Since an ethernet header is 14 bytes network drivers often end up with
the IP header at an unaligned offset. The IP header can be aligned by
shifting the start of the packet by 2 bytes. Drivers should do this
with:
skb_reserve(skb, NET_IP_ALIGN);
This is ensured when using netdev_alloc_skb_ip_align().
Issue #4094
This patch takes advantage of block transfer interrupts on Intel XHCI
controllers which is used during isochronous transfers. Because of a bug
in hardware (see usb_host_isoc_bei.patch header), this feature has been
disabled for Intel leading to up to 8000 interrupts/s for isochronous
transfer causing severe CPU consumption on Genode. With this commit we
lower host driver consumption to normal levels.
issue #4149
A Lx::Task is now associated to a USB device not the session any more.
This implies that a task lives as long as the device making it possible
to gracefully handle outstanding requests (i.e., synchronous) in case
the session has been closed.
issue #4149
The former implementation called 'TRACE_AND_STOP' which led to the
'usb_host_drv' to stop whenever such a function was called. Rather
than stopping return '0' and let the contrib code deal with this
situation.
Issue #4116.
This commit backports the Linux upstream commit (d4a6106) [*]
that introduces a check to prevent the sglist from being used
unconditionally.
[*] 'xhci: fix bounce buffer usage for non-sg list case'
Fixes#4116.
* The device XML information dataspace is only provided,
when the client's policy states `info="yes"`
* The device XM information gets changed to include the
physical resource names (I/O memory and IRQ addresses)
instead of virtual ids and page offset
Fix#4077
As linux drivers may distinguish device configuration by pci subdevice id in
addition to the pci device id, the former must also be used for finding the
matching entry. Otherwise, e.g., the iwlwifi driver might load the wrong
firmware.
Side note: Add break statement to save superfluous iterations after
match was identified.
Fixes genodelabs#4076
This API rework eases the access to memory-mapped I/O registers and
interrupts when using the platform driver. It introduces the notions of
- Platform::Device - one device obtained from a platform session
- Platform::Device::Mmio - locally-mapped MMIO registers of a device
- Platform::Device::Irq - interface for receiving device interrupts
The patch touches several drivers. Some drivers would require a
significant structural change to adopt the new API (e.g., net/virtio,
dde_linux drivers, imx gpio). In these cases, the patch adds
compatibility shims meant to be temporary. In other cases (e.g., imx
i2c), the adaptation was simple enough to carry through.
Fixes#4075
This patch extends the 'Platform_session::alloc_dma_buffer' interface
with a 'Cache' argument that corresponds to the argument accepted by
'Ram_allocator::alloc', which is used by the platform driver under the
hood.
Since the x86 platform driver used to be hardwired to allocate DMA
buffers as UNCACHED, I adjusted all drivers by specifying the UNCACHED
argument. Right now, this is needed as a hint for core to steer the
allocation of I/O page tables. Once we eliminate the need for such hints
(by introducing an explicit 'Region_map::attach_dma' operation), we can
revisit the drivers individually because cached DMA buffers should
generally be fine on the x86 architecture.
Issue #2243
The commits adds the same configuration values as supported up to now by
the monolithic usb driver. In contrast to the original, by default all drivers
are started. Disabling a controller type is used by Sculpt, e.g. for OHCI if
running Sculpt inside Virtualbox.
