If data is not available the stop command could dereference NULL.
Fetch the stop command directly from the request instead.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Functions were returning the wrong flag for the expected value. Swap
them.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Between the time connection with module is up and the host is added,
we can receive events (card inserted/removed, write protection
switch), so until the setup is complete we queue the events received
and handle them after.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Instead of using values in the command cmd_flags field use the real
flags in a bit mask.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This reverts commit 22690d72ae145cf12ae3df033670ed8ad7ecdde7.
It was meant for the gbsim repo, not this one :(
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The ccflags variable was spelled wrong, so no extra compilation flags
could be specified.
The proper flag is 'ccflags-y.'
Signed-off-by: Perry Hung <perry@leaflabs.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
An operation with a response in-flight will already have set the
operation result and would therefore never be cancelled by the current
implementation.
Note that the reference taken when sending the result will be dropped
in the message completion callback.
Also note that an incoming, non-unidirectional messages will always have
an allocated response if its result has been set.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Make sure to allocate a response message before setting the operation
result.
This is needed to handle cancellation of incoming operations.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Drop redundant OOM message, which would already have been logged by the
memory subsystem.
Also remove a FIXME about possibly sending a pre-allocated response,
which is neither possible or desirable. If we ever run out of memory we
have bigger problems then getting a response back to firmware.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add flag to identify unidirectional operations.
Use convenience helper rather than open coding the identification when
suppressing response messages.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add flag field to struct gb_operation, and a first flag
GB_OPERATION_FLAG_INCOMING to identify incoming operations.
Pass an initial set of flags when allocating new operations, and use
these to identify incoming operations rather than overloading the
meaning of GB_OPERATION_TYPE_INVALID. This also allows us to set the
type for all operations during allocation.
Also add convenience helper to identify incoming operations.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The final reference of an operation will be put after its completion
handler has run, so we must not drop the reference if it has already
been scheduled to avoid use-after-free.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Since commit 46ce118a2678 ("operation: refactor response handling")
sending operation responses is handled by greybus core so there is
currently no need to export the response helper.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add gfp mask argument to gb_operation_request_send in order to allow
submissions from atomic context.
Note that responses are currently always sent from non-atomic context as
incoming requests are processed in a work queue.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add gfp mask argument to gb_operation_create to allow operations to be
allocated in atomic context.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The current host-controller message-cancellation implementation suffer
from a lifetime bug as dynamically allocated URBs would complete and be
deallocated while being unlinked as part of cancellation.
The current locking is also insufficient to prevent the related race
where the URB is deallocated before being unlinked.
Fix this by pushing the cancellation implementation from greybus core
down to the host-controller drivers, and replace the "cookie" pointer
with a hcpriv field that those drivers can use to maintain their state
with the required locking and reference counting in place.
Specifically the drivers need to acquire a reference to the URB under a
lock before calling usb_kill_urb as part of cancellation.
Note that this also removes the insufficient gb_message_mutex, which
also effectively prevented us from implementing support for submissions
from atomic context.
Instead the host-controller drivers must now explicitly make sure that
the pre-allocated URBs are not reused while cancellation is in progress.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
They aren't used anymore, remove them. This also gets rid of
gb_bundle_connections_init().
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>
While introducing bundles, the device_id also got moved to the bundle,
whereas it identifies an interface block to the AP.
Move it back to interface instead of bundle.
Calls to gb_bundle(s)_init() are dropped as connections will be
initialized while they are created now, as device_id will be valid.
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>
The responsibility of this routine is to configure ARA switch to
establish a connection between a cport on the AP and a cport on an
interface.
The SVC protocol is responsible for such requests and we already have
connection_{create|destroy}_operation() to take care of this.
Moreover, this request is not served by the firmware or gbsim today and
they just print a debug message on this request. And so it is safe to
drop svc_set_route_send() function and fix the required functionality of
configuring the switch in svc protocol driver later.
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>
intf_cport_id is local to an interface and same intf_cport_id can be
used for two separate interface blocks. For finding a connection for an
interface, we are matching intf_cport_id of the connection with
cport_id, passed as argument. This is wrong, as it can match for a
connection on a different interface block.
Fix it by also comparing interface block for which connection is
requested.
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>
We may bind protocol with a connection from gb_connection_create(), if
bundle's device_id is already set. That's not the case until now.
But if the protocol is initialized with a call to
protocol->connection_init() from this place, kernel will crash.
This will happen because the connection isn't fully initialized yet, for
example its operation list isn't initialized yet. And as soon as the
protocol driver tries to send a request to the module from its
connection_init() callback, we will add an operation to this
uninitialized list. And it will crash while doing:
prev->next = new;
Try to bind the connection with a protocol only after the connection is
ready for operations.
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>
No need to write simple init/exit routines, use
gb_builtin_protocol_driver().
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>
This macro is also required by core protocols like control and svc, and
hence the 'gpbridge' name doesn't fit anymore.
Lets call this macro gb_builtin_protocol_driver().
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>
We have already defined macro's for SVC's major/minor numbers, lets use
them.
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>
The greybus UART protocol specification was updated to reduce the size of
the control field in serial-state-request and line-state-request. This
patch updates the kernel protocol driver to reflect the specification
changes. Once applied gbsim changes will be also be updated automatically
since gbsim depends on the header being modified directly.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
After reviewing the UART specification for greybus break, parity, framing
and over-run errors were moved to the receive-data message. This patch
implements that specification change in the UART protocol driver. Matching
code in gbsim has been tested with this change.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Parity/overrun/framing and break signals have been moved to the
receive-data message to more easily associate the signals with the TTY API.
Update the definitions in the protocol header and add a flags field to the
receive-data structure to facilitate transmission of those signal with the
receive-data message.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
There are new protocols defined which don't belong to any existing
class, add more classes to support them.
Reported-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The mmc request should assigned before use. Then
It should avoid freeing before using in mmc_request_done().
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The mmc host should be removed frist. Then it
will be freed.
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The macro of sdio version major and minor is defined twice.
This patch remove the redundant one.
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The current audio code uses i2c_get_adapter() without checking
that a non-NULL pointer is returned (i.e., that the i2c device
actually exists). When that happens, the system panics.
Fix the potential panic by erroring out with -ENODEV when
i2c_get_adapter() returns NULL.
CC: John Stultz <john.stultz@linaro.com>
Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
For older kernel, < 3.11, no copy to/from buffer with skip support was
defined. This could break builds for this versions of kernel.
Add them here.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Tested-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Some of the options for mmc host, are not defined in older kernels.
MMC_CAP2_HS400_1_2V, MMC_CAP2_HS400_1_8V, MMC_TIMING_MMC_DDR52 and
MMC_TIMING_MMC_HS400.
To not use them for older versions.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Tested-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
It is possible that (by mistake) the manifest contains non-control
cports with their protocol set as control-protocol or non-control bundle
with their class set as control-class.
Catch such cases, WARN for them and finally ignore them.
Also WARN if the control cport doesn't have its protocol as
control-protocol and control bundle doesn't have its class as
control-class.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
The AP needs to send connected and disconnection events to all
interfaces, before a CPort (other than control CPort) can be used.
For now do it which we initialize the connection, but it should be moved
to operations code later.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Manifest is fetched with control protocol now and so we don't need space
for it in hotplug data.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Control protocol is ready to be used for fetching manifest. Lets do it.
This changes few things:
- Creates/initializes bundle/connection for control protocol initially
and skips doing the same later.
- Manifest is parsed at link-up now, instead of hotplug which was the
case earlier. This is because we need device_id (provided during
link-up) for registering bundle.
- Manifest is fetched using control protocol.
So the sequence of events is:
Event Previously Now
----- ---------- ---
Interface Hotplug create intf create intf
parse mfst
Interface Link Up init bundles create control conn
get mfst size
get mfst
parse mfst
init bundles
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add control protocol driver that is responsible for handling operations
on control CPort. The AP also needs to support incoming requests on its
control port. Features not implemented yet are marked as TODO for now.
NOTE: This also fixes cport-bundle-id to 0 and cport-id to 2 for control
protocol.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
A connection and a bundle will be created for interfaces at the very
beginning for control protocol's functioning. And so the list of bundles
and connections for a interface will be non-empty by the time manifest
is parsed.
Currently we are firing a WARN when these lists are found to be
non-empty. Lets fix that to contain single bundle and connection for
control protocol.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Extend sdio implementation, as it for now it was basically stubs.
This implementation is compile tested only since there is no fw or
simulation support yet.
Next step is to add sdio support to gbsim and test it with success
using the mmc_test facility.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Add MMC to the list of options that shall be enable.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Greg reported sparse picked up the following warning:
/home/gregkh/ara/greybus/uart.c:105:34: warning: cast to restricted __le16
This is due to the control variable in gb_uart_serial_state_request which
needs to be declared __le16 not __u16.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reported-by: Greg Kroah-Hartman <gregkh@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
