Opening the backing files with O_SYNC makes things really slow. So slow
in fact that the modem times out after 10 seconds waiting for the last
EFS sync to go through. I think this takes forever because rmtfs is
doing 512-byte reads and writes.
One option would be to make this bigger. But a better option is to not
use O_SYNC, but explicitly do an fdatasync() after the iovec operation
is complete. This is better because 1) it's way faster, we no longer see
10-12 second delays at rebooto time, and 2) partial syncs of the EFS
file aren't useful anyway.
Use fdatasync() as opposed to fsync() since it's not important for the
metadata to be synced, just the file contents.
Signed-off-by: Evan Green <evangreen86@gmail.com>
Attempting to shut down a system with rmtfs running without an
associated remoteproc results in systemd waiting forever for the
remoteproc code to never signal that it's done.
Instead exit immediately when signalled, when there's no associated
remoteproc.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Instead of hardcoding BY_PARTLABEL_PATH for AOSP,
reuse -o option as suggested by Bjorn to expand John's
patch to find correct partition by-name on newer
kernels (which is /dev/block/platform/soc*/*.*/by-name).
For example: On db845c running v5.4+ kernel we run:
rmtfs -o /dev/block/platform/soc@0/1d84000.ufshc/by-name -P -r -s
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
When -s option is specified rmtfs handled the start of rproc
but at init may be the /sys entries are not fully populated yet
due to module load/setup so exit with 1 and let systemd restart
the service.
Signed-off-by: Aníbal Limón <anibal.limon@linaro.org>
Add sigterm/sigint handlers to enable graceful rmtfs server
bringdown on first instance of SIGINT/SIGTERM. Start/Stop the
remoteproc instance on RMTFS service up and SIGINT/SIGTERM
respectively. Force quit on second instance of SIGINT/SIGTERM.
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
[bjorn: Pipe for event loop signaling, reworked /sys traversal]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Most devices has partitions named modemst1, modemst2, fsg and fsc
backing the rmtfs. Add a new argument '-P' to get the storage
implementation to use these partitions directly instead of files.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Add a new argument '-r' to prevent writes back to the backing storage.
This is useful for experimenting with the remote storage, without having
the files overwritten.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Pass "struct rmtfd" instead of file descriptors in the interface. This
cleans up the api a little bit, but more importantly allow us to
associate additional things with the remote file descriptors.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Instead of relying on an initial lseek, use pread/pwrite. This creates a
cleaner interface towards the storage.c implementation, allowing us to
provide a memory-only implementation of the backing storage.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Enable the specification of storage paths other than /boot, using
a new -o command line argument. Getoptify the command line arguments
for better processing.
Currently, in order to back the EFS storage with a regular file,
those files have to be pre-allocated, and with their correct size.
This is especially problematic when preparing a minimal FSG, since
we do not know ahead of time what size to pre-allocate.
Allow reads that go beyond the end of the backing storage to simply
read zeroes. When a write comes in, the file will be automatically
expanded to the correct size. (And should really only be written
if a full sector was pulled out of the modem). For solutions
that use partitions instead of files, this change should be a no-op.
The message pump is cleaned up from cruft that was added to deal with
multiple services (rmtfs and rfsa) as well as ENETRESET handling.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Utilize the QMI encoder/decoder functions being part of libqrtr instead
of rolling our own.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
The rfsa service is not used on any supported targets and should most
likely be implemented in the kernel driver directly, so remove any
traces of it from rmtfs.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Attempt to open /dev/qcom_rfsa1 and use this instead of memory mapping
/dev/mem, while falling back to the old behavior. This allow us to drop
the dependency on /dev/mem access and will aid supporting multiple
memory regions.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Rather than exposing a pointer to the mmapped memory and performing IO
directly on this address pass the data through a local buffer and move
the reading and writing of memory into the sharedmem module.
This allows us to support shared memory that is not memory mapped in the
future.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Introduce a struct to pass around the parameters related to the rmtfs
memory, in preparation for supporting multiple memory regions.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
The nameserver notifies all registered servers about leaving clients.
Stub the handling of these messages, so they are not confused with the
qmi messages.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
To support creating and parsing requests and indications as well qmic
adds an extra parameter to the tlv alloc and decode functions, so that
this can be used to generate and validate that the qmi packet header is
of the correct type.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
The rmtfs tool pushlishes the two QMI services "rmtfs" and "rfsa", and
implements the necessary requests for rmtfs that's needed to boot the
modem subsystem on a Qualcomm based board.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
