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The rpmsg_dev_remove() in rpmsg_core is the place for releasing
this default endpoint.
So need to avoid destroying the default endpoint in
rpmsg_chrdev_eptdev_destroy(), this should be the same as
rpmsg_eptdev_release(). Otherwise there will be double destroy
issue that ept->refcount report warning:
refcount_t: underflow; use-after-free.
Call trace:
refcount_warn_saturate+0xf8/0x150
virtio_rpmsg_destroy_ept+0xd4/0xec
rpmsg_dev_remove+0x60/0x70
The issue can be reproduced by stopping remoteproc before
closing the /dev/rpmsgX.
Fixes: bea9b79c2d ("rpmsg: char: Add possibility to use default endpoint of the rpmsg device")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1663725523-6514-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Return the value rpmsg_chrdev_eptdev_add() directly instead of storing it
in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/20220826071954.252485-1-ye.xingchen@zte.com.cn
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Fixes: 53e2822e56 ("rpmsg: Introduce Qualcomm SMD backend")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220511120737.57374-1-linmq006@gmail.com
Correct kerneldoc warnings like:
drivers/rpmsg/qcom_glink_ssr.c:45:
warning: expecting prototype for G(). Prototype was for GLINK_SSR_DO_CLEANUP() instead
Also fix meaning of 'flag' argument.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220519073330.7187-3-krzysztof.kozlowski@linaro.org
The qcom_glink.name is read from DTS but never used further, never
referenced, so drop it. This also fixes kerneldoc warning:
drivers/rpmsg/qcom_glink_native.c:125:
warning: Function parameter or member 'name' not described in 'qcom_glink'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220519073330.7187-2-krzysztof.kozlowski@linaro.org
The use of strncpy() is considered deprecated for NUL-terminated
strings[1]. Replace strncpy() with strscpy_pad(), to keep existing
pad-behavior of strncpy, similarly to commit 08de420a80 ("rpmsg:
glink: Replace strncpy() with strscpy_pad()"). This fixes W=1 warning:
In function ‘qcom_glink_rx_close’,
inlined from ‘qcom_glink_work’ at ../drivers/rpmsg/qcom_glink_native.c:1638:4:
drivers/rpmsg/qcom_glink_native.c:1549:17: warning: ‘strncpy’ specified bound 32 equals destination size [-Wstringop-truncation]
1549 | strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220519073330.7187-1-krzysztof.kozlowski@linaro.org
rpmsg_register_device_override need to call put_device to free vch when
driver_set_override fails.
Fix this by adding a put_device() to the error path.
Fixes: bb17d110cb ("rpmsg: Fix calling device_lock() on non-initialized device")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220624024120.11576-1-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
The parameter associated to the announce_create and
announce_destroy ops functions is not an endpoint but a rpmsg device.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20220425071723.774050-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
There is no mutex protection for rpmsg_eptdev_open(),
especially for eptdev->ept read and write operation.
It may cause issues when multiple instances call
rpmsg_eptdev_open() in parallel,the return state
may be success or EBUSY.
Fixes: 964e8bedd5 ("rpmsg: char: Return an error if device already open")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1653104105-16779-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Here is the set of driver core changes for 5.19-rc1.
Note, I'm not really happy with this pull request as-is, see below for
details, but overall this is all good for everything but a small set of
systems, which we have a fix for already.
Lots of tiny driver core changes and cleanups happened this cycle,
but the two major things were:
- firmware_loader reorganization and additions including the
ability to have XZ compressed firmware images and the ability
for userspace to initiate the firmware load when it needs to,
instead of being always initiated by the kernel. FPGA devices
specifically want this ability to have their firmware changed
over the lifetime of the system boot, and this allows them to
work without having to come up with yet-another-custom-uapi
interface for loading firmware for them.
- physical location support added to sysfs so that devices that
know this information, can tell userspace where they are
located in a common way. Some ACPI devices already support
this today, and more bus types should support this in the
future.
Smaller changes included:
- driver_override api cleanups and fixes
- error path cleanups and fixes
- get_abi script fixes
- deferred probe timeout changes.
It's that last change that I'm the most worried about. It has been
reported to cause boot problems for a number of systems, and I have a
tested patch series that resolves this issue. But I didn't get it
merged into my tree before 5.18-final came out, so it has not gotten any
linux-next testing.
I'll send the fixup patches (there are 2) as a follow-on series to this
pull request if you want to take them directly, _OR_ I can just revert
the probe timeout changes and they can wait for the next -rc1 merge
cycle. Given that the fixes are tested, and pretty simple, I'm leaning
toward that choice. Sorry this all came at the end of the merge window,
I should have resolved this all 2 weeks ago, that's my fault as it was
in the middle of some travel for me.
All have been tested in linux-next for weeks, with no reported issues
other than the above-mentioned boot time outs.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the set of driver core changes for 5.19-rc1.
Lots of tiny driver core changes and cleanups happened this cycle, but
the two major things are:
- firmware_loader reorganization and additions including the ability
to have XZ compressed firmware images and the ability for userspace
to initiate the firmware load when it needs to, instead of being
always initiated by the kernel. FPGA devices specifically want this
ability to have their firmware changed over the lifetime of the
system boot, and this allows them to work without having to come up
with yet-another-custom-uapi interface for loading firmware for
them.
- physical location support added to sysfs so that devices that know
this information, can tell userspace where they are located in a
common way. Some ACPI devices already support this today, and more
bus types should support this in the future.
Smaller changes include:
- driver_override api cleanups and fixes
- error path cleanups and fixes
- get_abi script fixes
- deferred probe timeout changes.
It's that last change that I'm the most worried about. It has been
reported to cause boot problems for a number of systems, and I have a
tested patch series that resolves this issue. But I didn't get it
merged into my tree before 5.18-final came out, so it has not gotten
any linux-next testing.
I'll send the fixup patches (there are 2) as a follow-on series to this
pull request.
All have been tested in linux-next for weeks, with no reported issues
other than the above-mentioned boot time-outs"
* tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
driver core: fix deadlock in __device_attach
kernfs: Separate kernfs_pr_cont_buf and rename_lock.
topology: Remove unused cpu_cluster_mask()
driver core: Extend deferred probe timeout on driver registration
MAINTAINERS: add Russ Weight as a firmware loader maintainer
driver: base: fix UAF when driver_attach failed
test_firmware: fix end of loop test in upload_read_show()
driver core: location: Add "back" as a possible output for panel
driver core: location: Free struct acpi_pld_info *pld
driver core: Add "*" wildcard support to driver_async_probe cmdline param
driver core: location: Check for allocations failure
arch_topology: Trace the update thermal pressure
kernfs: Rename kernfs_put_open_node to kernfs_unlink_open_file.
export: fix string handling of namespace in EXPORT_SYMBOL_NS
rpmsg: use local 'dev' variable
rpmsg: Fix calling device_lock() on non-initialized device
firmware_loader: describe 'module' parameter of firmware_upload_register()
firmware_loader: Move definitions from sysfs_upload.h to sysfs.h
firmware_loader: Fix configs for sysfs split
selftests: firmware: Add firmware upload selftests
...
driver_set_override() helper uses device_lock() so it should not be
called before rpmsg_register_device() (which calls device_register()).
Effect can be seen with CONFIG_DEBUG_MUTEXES:
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 3 PID: 57 at kernel/locking/mutex.c:582 __mutex_lock+0x1ec/0x430
...
Call trace:
__mutex_lock+0x1ec/0x430
mutex_lock_nested+0x44/0x50
driver_set_override+0x124/0x150
qcom_glink_native_probe+0x30c/0x3b0
glink_rpm_probe+0x274/0x350
platform_probe+0x6c/0xe0
really_probe+0x17c/0x3d0
__driver_probe_device+0x114/0x190
driver_probe_device+0x3c/0xf0
...
Refactor the rpmsg_register_device() function to use two-step device
registering (initialization + add) and call driver_set_override() in
proper moment.
This moves the code around, so while at it also NULL-ify the
rpdev->driver_override in error path to be sure it won't be kfree()
second time.
Fixes: 42cd402b8f ("rpmsg: Fix kfree() of static memory on setting driver_override")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20220429195946.1061725-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
irq_of_parse_and_map() returns 0 on failure, so this should not be
passed further as error return code.
Fixes: 1a358d3506 ("rpmsg: qcom_smd: Fix irq_of_parse_and_map() return value")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220423093932.32136-1-krzysztof.kozlowski@linaro.org
Unregister the rpmsg_ctrl device instead of just freeing the
the virtio_rpmsg_channel structure.
This will properly unregister the device and call
virtio_rpmsg_release_device() that frees the structure.
Fixes: c486682ae1 ("rpmsg: virtio: Register the rpmsg_char device")
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220426060536.15594-4-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
vch will be free in virtio_rpmsg_release_device() when
rpmsg_ctrldev_register_device() fails. There is no need to call
kfree() again.
Fixes: c486682ae1 ("rpmsg: virtio: Register the rpmsg_char device")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20220426060536.15594-3-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
vch will be free in virtio_rpmsg_release_device() when
rpmsg_ns_register_device() fails. There is no need to call kfree() again.
Fix this by changing error path from free_vch to free_ctrldev.
Fixes: c486682ae1 ("rpmsg: virtio: Register the rpmsg_char device")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Tested-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20220426060536.15594-2-hbh25y@gmail.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
The driver_override field from platform driver should not be initialized
from static memory (string literal) because the core later kfree() it,
for example when driver_override is set via sysfs.
Use dedicated helper to set driver_override properly.
Fixes: 950a7388f0 ("rpmsg: Turn name service into a stand alone driver")
Fixes: c0cdc19f84 ("rpmsg: Driver for user space endpoint interface")
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220419113435.246203-13-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Memory pointed by variable 'old' in field store macro is not modified,
so it can be made a pointer to const.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220419113435.246203-12-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Allow the user space application to create and release an rpmsg device
by adding RPMSG_CREATE_DEV_IOCTL and RPMSG_RELEASE_DEV_IOCTL ioctrls to
the /dev/rpmsg_ctrl interface
The RPMSG_CREATE_DEV_IOCTL Ioctl can be used to instantiate a local rpmsg
device.
Depending on the back-end implementation, the associated rpmsg driver is
probed and a NS announcement can be sent to the remote processor.
The RPMSG_RELEASE_DEV_IOCTL allows the user application to release a
rpmsg device created either by the remote processor or with the
RPMSG_CREATE_DEV_IOCTL call.
Depending on the back-end implementation, the associated rpmsg driver is
removed and a NS destroy rpmsg can be sent to the remote processor.
Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-12-arnaud.pouliquen@foss.st.com
For the rpmsg virtio backend, the current implementation of the rpmsg char
only allows to instantiate static(i.e. prefixed source and destination
addresses) end points, and only on the Linux user space initiative.
This patch defines the "rpmsg-raw" channel and registers it to the rpmsg bus.
This registration allows:
- To create the channel at the initiative of the remote processor
relying on the name service announcement mechanism. In other words the
/dev/rpmsgX interface is instantiate by the remote processor.
- To use the channel object instead of the endpoint, thus preventing the
user space from having the knowledge of the remote processor's
endpoint addresses.
- To rely on udev to be inform when a /dev/rpmsgX is created on remote
processor request, indicating that the remote processor is ready to
communicate.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-11-arnaud.pouliquen@foss.st.com
Current implementation create/destroy a new endpoint on each
rpmsg_eptdev_open/rpmsg_eptdev_release calls.
For a rpmsg device created by the NS announcement a default endpoint is created.
In this case we have to reuse the default rpmsg device endpoint associated to
the channel instead of creating a new one.
This patch prepares the introduction of a rpmsg channel device for the
char device. The rpmsg channel device will require a default endpoint to
communicate to the remote processor.
Add the default_ept field in rpmsg_eptdev structure.This pointer
determines the behavior on rpmsg_eptdev_open and rpmsg_eptdev_release call.
- If default_ept == NULL:
Use the legacy behavior by creating a new endpoint each time
rpmsg_eptdev_open is called and release it when rpmsg_eptdev_release
is called on /dev/rpmsgX device open/close.
- If default_ept is set:
use the rpmsg device default endpoint for the communication.
Add protection in rpmsg_eptdev_ioctl to prevent to destroy a default endpoint.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-10-arnaud.pouliquen@foss.st.com
Introduce the rpmsg_chrdev_eptdev_alloc and rpmsg_chrdev_eptdev_add
internal function to split the allocation part from the device add.
This patch prepares the introduction of a rpmsg channel device for the
char device. An default endpoint will be created,
referenced in the rpmsg_eptdev structure before adding the devices.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-9-arnaud.pouliquen@foss.st.com
The rpmsg_chrdev driver has been replaced by the rpmsg_ctrl driver
for the /dev/rpmsg_ctrlX devices management. The reference for the
driver override is now the rpmsg_ctrl.
Update the rpmsg_chrdev_register_device function to reflect the update,
and rename the function to use the rpmsg_ctrldev prefix.
The platform drivers are updated accordingly.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-8-arnaud.pouliquen@foss.st.com
Create the rpmsg_ctrl.c module and move the code related to the
rpmsg_ctrldev device in this new module.
Add the dependency between rpmsg_char and rpmsg_ctrl in the
kconfig file:
1) RPMSG_CTRL can set as module or built-in if
RPMSG=y || RPMSG_CHAR=y || RPMSG_CHAR=n
2) RPMSG_CTRL can not be set as built-in if
RPMSG=m || RPMSG_CHAR=m
Note that RPMGH_CHAR and RPMSG_CTRL can be activated separately.
Therefore, the RPMSG_CTRL configuration must be set for backwards compatibility.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-4-arnaud.pouliquen@foss.st.com
Migrate the creation of the rpmsg class from the rpmsg_char
to the core that the class is usable by the rpmsg_char and
the future rpmsg_ctrl module.
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-3-arnaud.pouliquen@foss.st.com
To prepare the split of the code related to the control (ctrldev)
and the endpoint (eptdev) devices in 2 separate files:
- Rename and export the functions in rpmsg_char.h.
- Suppress the dependency with the rpmsg_ctrldev struct in the
rpmsg_eptdev_create function.
Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-2-arnaud.pouliquen@foss.st.com
rpmsg_trysend() returns -ENOMEM when no rpmsg buffer can be allocated.
this causes write to fail with this error as opposed to -EAGAIN.
this is what user space applications (and libraries like boost.asio)
would expect when using normal character devices.
Signed-off-by: Tim Blechmann <tim@klingt.org>
Cc: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220313024541.1579848-2-tim@klingt.org
In qcom_channel_state_worker(), we are setting channel->registered
to true when registering a channel, but this is getting repeated both
before and after re-locking the channels_lock spinlock, which is
obviously a typo.
Remove the assignment done out of the spinlock to fix this redundancy.
Fixes: 53e2822e56 ("rpmsg: Introduce Qualcomm SMD backend")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220114133259.247726-1-angelogioacchino.delregno@collabora.com
Replace zero-length array with flexible-array member and make use
of the struct_size() helper in kzalloc(). For example:
struct glink_defer_cmd {
struct list_head node;
struct glink_msg msg;
u8 data[];
};
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220216030720.1839503-1-chi.minghao@zte.com.cn
On msm8953 the channel seems to be already opened when booting Linux but
we still need to open it for communication with regulators etc.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220220201909.445468-6-luca@z3ntu.xyz
qcom_smd's only child, smd-rpm uses arch_initcall and both have to be up
before almost anything else to ensure the MSM SoCs will work fine and
nothing will have to resort to probe defering, as this is the main pillar
of all things DVFS on these machines. Promote it to arch_initcall to avoid
such issues.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211230023253.1123142-1-konrad.dybcio@somainline.org
The cdev cleanup in the rpmsg_char driver was not performed properly,
resulting in unpredicable behaviour when the parent remote processor is
stopped with any of the cdevs open by a client.
The two patches transitions the implementation to use cdev_device_add()
and cdev_del_device(), to capture the relationship between the two
objects, and relocates the incorrectly placed cdev_del().
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Merge tag 'rpmsg-v5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull rpmsg fixes from Bjorn Andersson:
"The cdev cleanup in the rpmsg_char driver was not performed properly,
resulting in unpredicable behaviour when the parent remote processor
is stopped with any of the cdevs open by a client.
Two patches transitions the implementation to use cdev_device_add()
and cdev_del_device(), to capture the relationship between the two
objects, and relocates the incorrectly placed cdev_del()"
* tag 'rpmsg-v5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
rpmsg: char: Fix race between the release of rpmsg_eptdev and cdev
rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev
partial support for < MAX_ORDER - 1 granularity for virtio-mem
driver_override for vdpa
sysfs ABI documentation for vdpa
multiqueue config support for mlx5 vdpa
Misc fixes, cleanups.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
"virtio,vdpa,qemu_fw_cfg: features, cleanups, and fixes.
- partial support for < MAX_ORDER - 1 granularity for virtio-mem
- driver_override for vdpa
- sysfs ABI documentation for vdpa
- multiqueue config support for mlx5 vdpa
- and misc fixes, cleanups"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (42 commits)
vdpa/mlx5: Fix tracking of current number of VQs
vdpa/mlx5: Fix is_index_valid() to refer to features
vdpa: Protect vdpa reset with cf_mutex
vdpa: Avoid taking cf_mutex lock on get status
vdpa/vdpa_sim_net: Report max device capabilities
vdpa: Use BIT_ULL for bit operations
vdpa/vdpa_sim: Configure max supported virtqueues
vdpa/mlx5: Report max device capabilities
vdpa: Support reporting max device capabilities
vdpa/mlx5: Restore cur_num_vqs in case of failure in change_num_qps()
vdpa: Add support for returning device configuration information
vdpa/mlx5: Support configuring max data virtqueue
vdpa/mlx5: Fix config_attr_mask assignment
vdpa: Allow to configure max data virtqueues
vdpa: Read device configuration only if FEATURES_OK
vdpa: Sync calls set/get config/status with cf_mutex
vdpa/mlx5: Distribute RX virtqueues in RQT object
vdpa: Provide interface to read driver features
vdpa: clean up get_config_size ret value handling
virtio_ring: mark ring unused on error
...
struct rpmsg_eptdev contains a struct cdev. The current code frees
the rpmsg_eptdev struct in rpmsg_eptdev_destroy(), but the cdev is
a managed object, therefore its release is not predictable and the
rpmsg_eptdev could be freed before the cdev is entirely released.
The cdev_device_add/del() API was created to address this issue
(see commit '233ed09d7fda ("chardev: add helper function to register
char devs with a struct device")'), use it instead of cdev add/del().
Fixes: c0cdc19f84 ("rpmsg: Driver for user space endpoint interface")
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220110104706.v6.2.Idde68b05b88d4a2e6e54766c653f3a6d9e419ce6@changeid
This will enable cleanups down the road.
The idea is to disable cbs, then add "flush_queued_cbs" callback
as a parameter, this way drivers can flush any work
queued after callbacks have been disabled.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20211013105226.20225-1-mst@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
During the rpmsg_dev_probe, if rpdev->ops->announce_create returns an
error, the rpmsg device and default endpoint should be freed before
exiting the function.
Fixes: 5e619b4867 ("rpmsg: Split rpmsg core and virtio backend")
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211206190758.10004-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
kernel documentation specification:
"The return value, if any, should be described in a dedicated section
named Return."
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20211108140126.3530-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
The remoteproc repo is moved to a new path on git.kernel.org, to allow
Mathieu push access to the branches.
Support for the Mediatek MT8195 SCP was added, the related DeviceTree
binding was converted to YAML and MT8192 SCP was documented as well.
Amlogic Meson6, Meson8, Meson8b and Meson8m2 has an ARC core to aid in
resuming the system after suspend, a new remoteproc driver for booting
this core is introduced.
A new driver to support the DSP processor found on NXP i.MX8QM,
i.MX8QXP, i.MX8MP and i.MX8ULP is added.
The Qualcomm modem and TrustZone based remoteproc drivers gains support
for the modem in SC7280 and MSM8996 gains support for a missing
power-domain.
Throughout the Qualcomm drivers, the support for informing the always-on
power coprocessor about the state of each remoteproc is reworked to
avoid complications related to our use of genpd and the system suspend
state.
Lastly a number of small fixes are found throughout the drivers and
framework.
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Merge tag 'rproc-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull remoteproc updates from Bjorn Andersson:
"The remoteproc repo is moved to a new path on git.kernel.org, to allow
Mathieu push access to the branches.
Support for the Mediatek MT8195 SCP was added, the related DeviceTree
binding was converted to YAML and MT8192 SCP was documented as well.
Amlogic Meson6, Meson8, Meson8b and Meson8m2 has an ARC core to aid in
resuming the system after suspend, a new remoteproc driver for booting
this core is introduced.
A new driver to support the DSP processor found on NXP i.MX8QM,
i.MX8QXP, i.MX8MP and i.MX8ULP is added.
The Qualcomm modem and TrustZone based remoteproc drivers gains
support for the modem in SC7280 and MSM8996 gains support for a
missing power-domain.
Throughout the Qualcomm drivers, the support for informing the
always-on power coprocessor about the state of each remoteproc is
reworked to avoid complications related to our use of genpd and the
system suspend state.
Lastly a number of small fixes are found throughout the drivers and
framework"
* tag 'rproc-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (39 commits)
remoteproc: Remove vdev_to_rvdev and vdev_to_rproc from remoteproc API
remoteproc: omap_remoteproc: simplify getting .driver_data
remoteproc: qcom_q6v5_mss: Use devm_platform_ioremap_resource_byname() to simplify code
remoteproc: Fix a memory leak in an error handling path in 'rproc_handle_vdev()'
remoteproc: Fix spelling mistake "atleast" -> "at least"
remoteproc: imx_dsp_rproc: mark PM functions as __maybe_unused
remoteproc: imx_dsp_rproc: Correct the comment style of copyright
dt-bindings: dsp: fsl: Update binding document for remote proc driver
remoteproc: imx_dsp_rproc: Add remoteproc driver for DSP on i.MX
remoteproc: imx_rproc: Add IMX_RPROC_SCU_API method
remoteproc: imx_rproc: Move common structure to header file
rpmsg: char: Remove useless include
remoteproc: meson-mx-ao-arc: fix a bit test
remoteproc: mss: q6v5-mss: Add modem support on SC7280
dt-bindings: remoteproc: qcom: Update Q6V5 Modem PIL binding
remoteproc: qcom: pas: Add SC7280 Modem support
dt-bindings: remoteproc: qcom: pas: Add SC7280 MPSS support
remoteproc: qcom: pas: Use the same init resources for MSM8996 and MSM8998
MAINTAINERS: Update remoteproc repo url
dt-bindings: remoteproc: k3-dsp: Cleanup SoC compatible from DT example
...
For the GLINK implementation this adds support for splitting outgoing
messages that are too large to fit in the fifo, it introduces the use of
"read notifications", to avoid polling in the case where the outgoing
fifo is full and a few bugs are squashed.
The return value of rpmsg_create_ept() for when RPMSG is disabled is
corrected to return a valid error, the Mediatek rpmsg driver is updated
to match the DT binding and a couple of cleanups are done in the virtio
rpmsg driver.
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Merge tag 'rpmsg-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull rpmsg updates from Bjorn Andersson:
"For the GLINK implementation this adds support for splitting outgoing
messages that are too large to fit in the fifo, it introduces the use
of "read notifications", to avoid polling in the case where the
outgoing fifo is full and a few bugs are squashed.
The return value of rpmsg_create_ept() for when RPMSG is disabled is
corrected to return a valid error, the Mediatek rpmsg driver is
updated to match the DT binding and a couple of cleanups are done in
the virtio rpmsg driver"
* tag 'rpmsg-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
rpmsg: glink: Send READ_NOTIFY command in FIFO full case
rpmsg: glink: Remove channel decouple from rpdev release
rpmsg: glink: Remove the rpmsg dev in close_ack
rpmsg: glink: Add TX_DATA_CONT command while sending
rpmsg: virtio_rpmsg_bus: use dev_warn_ratelimited for msg with no recipient
rpmsg: virtio: Remove unused including <linux/of_device.h>
rpmsg: Change naming of mediatek rpmsg property
rpmsg: Fix rpmsg_create_ept return when RPMSG config is not defined
rpmsg: glink: Replace strncpy() with strscpy_pad()
Return the rpmsg buffer MTU for sending message, so rpmsg users
can split a long message in several sub rpmsg buffers.
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20211015094701.5732-2-arnaud.pouliquen@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The current design sleeps unconditionally in TX FIFO full case and
wakeup only after sleep timer expires which adds random delays in
clients TX path.
Avoid sleep and use READ_NOTIFY command so that writer can be woken up
when remote notifies about read completion by sending IRQ.
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1596086296-28529-7-git-send-email-deesin@codeaurora.org
If a channel is being rapidly restarting and the kobj release worker is
busy, there is a chance the rpdev_release function will run after the
channel struct itself has been released.
There should not be a need to decouple the channel from rpdev in the
rpdev release since that should only happen from the close commands.
Signed-off-by: Chris Lew <clew@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1596086296-28529-6-git-send-email-deesin@codeaurora.org
Un-register and register of rpmsg driver is sending invalid open_ack
on closed channel.
To avoid sending invalid open_ack case unregister the rpmsg device
after receiving the local_close_ack from remote side.
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
[bjorn: s/strlcpy/strscpy/]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1596086296-28529-5-git-send-email-deesin@codeaurora.org
With current design the transport can send packets of size upto
FIFO_SIZE which is 16k and return failure for all packets above 16k.
Add TX_DATA_CONT command to send packets greater than 16k by splitting
into 8K chunks.
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1596086296-28529-4-git-send-email-deesin@codeaurora.org
