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gb_connection_disable_rx() fn is required to be used by other modules
(e.g. bridged-phy drivers) and so export it.
Testing Done: Tested on gbsim.
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Clean up handling of the ES3-bootrom quirks by adding an interface
quirk-flags field that is set appropriately when we detect that the ES3
bootrom is running.
Note that we need to reserve the DME_DIS_UNIPRO_BOOT_STARTED and
DME_DIS_FALLBACK_UNIPRO_BOOT_STARTED status values for the ES3 bootrom,
which does not support any CPort features (unlike later boot stages).
Add a BOOTROM infix to the defines to make this more clear.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Rename the CPort-features callbacks, that are not just used to enable
FCT flow, to the more descriptive cport_features_enable/disable.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add CSD connection flag that can be specified when allocating a
connection to enable Controlled Segment Dropping in favour of E2EFC
which is enabled by default.
Note that most connections are expected to have E2EFC enabled.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Generalise the svc connection-create helper to accept a cport-flags
argument and handle the flags in the connection code instead.
Note that the camera driver currently manages its data connection
directly. We keep E2EFC enabled for now even though it will soon need
to be disabled due to some pending firmware updates.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add interface for associating a flag bitmask with a connection when
creating it.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The AP must enable the FCT flow of APBA once it has received the response
from the AP that the connection between APBA and a module has been setted up.
Disable the flow of FCT tokens when destroying connections.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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In order to support mailbox-free control cport init on the bridges the AP must
be able to enable/disable the flow of unipro fct tokens. Add a new API that
will enable or disable on APBA the flow of fct tokens.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The callers ensures that connection->lock is taken before calling few
routines, but that isn't enough for sparse as it sees an unexpected
unlock.
greybus/connection.c:380:29: warning: context imbalance in 'gb_connection_cancel_operations' - unexpected unlock
Fix that adding __must_lock() attribute to the function declaration.
This also adds the attribute for
gb_connection_flush_incoming_operations(), which isn't showing any
sparse warnings with the current state of code, but with minor
rearrangements of the code.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Set the connection request handler at creation rather than when enabling
the connection.
This is possible now that connections are created by the drivers that
use them rather than by core at manifest parsing time.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Return an ERR_PTR on errors when creating connections.
This allows driver probe to fail with a more informative error message
as not all connection creation errors are due to memory exhaustion.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Drop the _dynamic suffix from the exported interface that drivers use to
create connections.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Simplify the exported generic interface for creating dynamic
connections.
Since all driver connections will have a bundle we can drop the
redundant interface parameter.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The protocol-id parameter is only used by the legacy driver so remove
it from the generic interface and move it to the legacy driver until it
can be removed completely.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add dedicated helper to create control connections.
This will allow us to simplify the generic (dynamic) interface.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Drop legacy protocol parameter from static connection interface.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Defer connection creation to bundle driver probe instead of creating
them when initialising the interface and parsing the manifest.
Store copies of the CPorts descriptors in the bundle for the drivers to
use, and update the legacy driver.
This is needed for drivers that need more control over host-device
resource management, for example, when a protocol needs to use a
dedicated host CPort for traffic offloading (e.g. camera data).
This also avoids allocating host CPorts for bundles that are not bound
to a driver or for remote CPorts that a driver does not need.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Use the gb_connection_mutex when making sure a remote CPort is
available.
This is needed when moving to driver-managed connections that can be
created and destroyed at any time.
Also check for duplicate bundle-less connections.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Serialise connection creation against concurrent creation and
destruction using a global mutex.
This is needed to prevent two drivers from attempting to create a
connection to the same interface CPort and to cope with a racing
connection destroy when moving to driver managed connections.
Note that the locking can not (easily) be made more fine-grained as not
all connections have an interface, but these are not hot paths anyway.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Fix longstanding race that could lead to a connection being destroyed
while processing an incoming message due to missing reference counting
when looking up the connection.
Add helpers to manipulate the connection kref.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Drop the useless connection_mutex that did not, and can not be used to
prevent connection lookup races in atomic context and therefore serves
no purpose.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Destroy the work queue when the connection is destroyed/deregistered
instead of when the last reference is dropped.
The work queue is not needed once the connection has been deregistered,
and no operations will ever be added to it again (handled by checking
connection->state) even if the connection object may not be deallocated
until the final reference is dropped.
The work-queue name is set based on the host-device name and host-device
cport id, something which guarantees a unique name. This would no longer
be true if the work queue was not destroyed at connection deregistration
as a new connection could then be created for that very same host cport.
This is not necessarily a problem unless some work queue features are
used that require unique work-queue names, but let's try to be well
behaved.
Also update an obsolete comment and make explicit that a connection must
be disabled before being destroyed.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove WARN_ON from connection destroy testing for a NULL-connection
when destroying a connection.
This will allow for simpler driver code when releasing driver-managed
connections.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove the broken legacy protocol-version handling from core and move it
to the legacy driver instead.
Note that version handling has always been broken as legacy protocols
were looked up and bound to connections before the connections were
enabled and version negotiation could take place (over that very
connection). Document that in the legacy driver as well.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Move legacy protocol and connection handling to the legacy driver.
Rename the former global functions using a common legacy_ prefix.
Note that all legacy protocols suffer from a connection initialisation
race in that the protocol-specific initialisation, which includes
allocation of protocol-specific state containers, can not happen until
*after* the connection has been enabled. This is a major flaw in the
original design that we can now finally address by converting the legacy
protocol drivers into proper bundle (class) drivers.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Drop dependency on the legacy protocol abstraction.
Remove the now unused and last legacy-protocol flag
GB_PROTOCOL_SKIP_VERSION along with the protocol-flag feature.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove the legacy protocol flags that were used to suppress the
connected and disconnected events.
Instead send the connected and disconnected event for all bundle
connections and explicitly exclude static connections and control
connections.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add helper to disable and flush incoming operations.
This is intended to be used by core to flush any incoming requests
before calling driver disconnect, but could potentially later be
exported for driver use as well.
Note that we currently flush all incoming operation and allow the
request handlers to run, but cancel any responses sent. This may need to
be refined later.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add a new connection state ENABLED_TX in which only outgoing operations
are allowed.
This allows drivers to query the device during probe before allocating
their state containers without having to worry about racing incoming
requests.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add connection mutex to protect connection enabling and disabling.
This is needed to eventually allow drivers to manage the state of their
connections during operation (i.e. post probe and pre disconnect).
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Make sure to cancel all (incoming) operations when failing to enable a
connection.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Move helper to cancel active operations above gb_connection_enable and
simplify locking.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Always cancel all operations on connection disable and remove the now
unused DESTROYING state.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add a connection request-handler field to struct gb_connection that is
set when the connection is enabled.
This is a step towards removing the legacy protocol abstraction from
core, and will also be used to implement unidirectional connection
states (e.g. only outgoing operations are allowed).
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove implicit disable of legacy connections from the destructor.
This is a step towards removing the legacy-protocol handling from core.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Rename legacy connection init and exit functions.
This is a step towards removing the legacy-protocol handling from core.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Add the first Greybus bundle driver that will be used when transitioning
from legacy Greybus protocols to bundle drivers.
The legacy-protocol driver initially binds to all current bundle classes.
In order to avoid having to update current module-loading scripts, keep
this driver internal to greybus core at least until modalias support is
added. Note that this prevents unloading any protocol drivers without
first tearing down the host device due to a circular module dependency.
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Refactor connection enable and disable.
This is a step towards removing the legacy-protocol handling from core.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Set connection state to ENABLE before sending the control connected
message, and set state DISABLE after sending the control disconnected
event.
Remove the now unused ERROR connection state.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Use the host device and connection name when logging errors as the
version-request helper must not assume that all connection have a
bundle.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Fix up the last few places where hexadecimal rather than decimal
notation was used for interface, bundle and cport ids.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Create the svc-connection as part of the host device, and destroy it in
the host-device destructor.
The svc-connection is enabled when registering the host device, and
disabled when the host device is deregistered.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Separate connection creation from enabling.
This will ultimately allow connection structures to be created while
parsing manifests, but the connections to not be enabled until a driver
is bound.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Unbind protocol at connection exit rather than when the connection is
destroyed.
Now a protocol is only bound while a connection is enabled.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Bind protocol at connection init.
This is an intermediate step in separating connection creation and
enabling.
Note that the protocol is currently still unbound when the connection is
destroyed.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Make sure to fail properly when a protocol is missing.
This prevents the connection from being created, which is fine as we
currently never bind protocols post creation.
This is an intermediate step in moving protocol binding to
connection_init.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove gb_bundle_bind_protocols() that was used to iterate over all
registered bundles and bind protocols to them should a protocol become
available post bundle creation.
The protocol abstraction as a generic construct is going away in favour
of class drivers. Connections will be setup when a class driver is
probed, and driver modules can be loaded on-demand by user space based
on uevents and modalias.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Because the width of our fields is already known, we can use %0Nx (for
hex) to print N bytes and %u (for unsigned decimal), instead of using %h
and %hh, which isn't that readable.
This patch makes following changes:
- s/%hx/%04x
- s/%04hx/%04x
- s/%hhx/%02x
- s/%02hhx/%02x
- s/%hhu/%u
- s/%hu/%u
- s/%x/%02x for u8 value (only at a single place)
Suggested-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Remove conditional enabling of connections when binding protocols that
served no purpose as a connection either has no bundle or it has an
interface with a valid device id.
Also remove the now unused GB_PROTOCOL_NO_BUNDLE protocol flag.
This is an intermediate step in moving the protocol binding to
connection_init, but is also needed as the control bundle is going away.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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The svc connection helper functions should not assume that all dynamic
connections will have a bundle.
This is needed as the control bundle is going away.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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