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* rpmsg: convert sysfs snprintf to sysfs_emitXuezhi Zhang2022-07-161-1/+1
| | | | | | | | | | Fix the following coccicheck warning: drivers/rpmsg/qcom_glink_native.c:1677:8-16: WARNING: use scnprintf or sprintf Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20220607120649.78436-1-zhangxuezhi1@coolpad.com
* rpmsg: qcom_smd: Fix refcount leak in qcom_smd_parse_edgeMiaoqian Lin2022-07-161-0/+1
| | | | | | | | | | of_parse_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. Fixes: 53e2822e56c7 ("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
* rpmsg: qcom: correct kerneldocKrzysztof Kozlowski2022-07-162-3/+3
| | | | | | | | | | | | | | 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
* rpmsg: qcom: glink: remove unused nameKrzysztof Kozlowski2022-07-161-6/+0
| | | | | | | | | | | | | 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
* rpmsg: qcom: glink: replace strncpy() with strscpy_pad()Krzysztof Kozlowski2022-07-162-3/+3
| | | | | | | | | | | | | | | | | | | 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 08de420a8014 ("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: Strcpy is not safe, use strscpy_pad() insteadSaud Farooqui2022-06-241-1/+1
| | | | | | | | | | Replace strcpy() with strscpy_pad() for copying the rpmsg device name in rpmsg_register_device_override(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Saud Farooqui <farooqui_saud@hotmail.com> Link: https://lore.kernel.org/r/PA4P189MB14210AA95DCA3715AFA7F4A68BB59@PA4P189MB1421.EURP189.PROD.OUTLOOK.COM Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
* rpmsg: Fix possible refcount leak in rpmsg_register_device_override()Hangyu Hua2022-06-241-0/+1
| | | | | | | | | | | | | 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: bb17d110cbf2 ("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>
* rpmsg: Fix parameter naming for announce_create/destroy opsArnaud Pouliquen2022-06-241-2/+2
| | | | | | | | | 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>
* rpmsg: mtk_rpmsg: Fix circular locking dependencyAngeloGioacchino Del Regno2022-06-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During execution of the worker that's used to register rpmsg devices we are safely locking the channels mutex but, when creating a new endpoint for such devices, we are registering a IPI on the SCP, which then makes the SCP to trigger an interrupt, lock its own mutex and in turn register more subdevices. This creates a circular locking dependency situation, as the mtk_rpmsg channels_lock will then depend on the SCP IPI lock. [ 15.447736] ====================================================== [ 15.460158] WARNING: possible circular locking dependency detected [ 15.460161] 5.17.0-next-20220324+ #399 Not tainted [ 15.460165] ------------------------------------------------------ [ 15.460166] kworker/0:3/155 is trying to acquire lock: [ 15.460170] ffff5b4d0eaf1308 (&scp->ipi_desc[i].lock){+.+.}-{4:4}, at: scp_ipi_lock+0x34/0x50 [mtk_scp_ipi] [ 15.504958] [] but task is already holding lock: [ 15.504960] ffff5b4d0e8f1918 (&mtk_subdev->channels_lock){+.+.}-{4:4}, at: mtk_register_device_work_function+0x50/0x1cc [mtk_rpmsg] [ 15.504978] [] which lock already depends on the new lock. [ 15.504980] [] the existing dependency chain (in reverse order) is: [ 15.504982] [] -> #1 (&mtk_subdev->channels_lock){+.+.}-{4:4}: [ 15.504990] lock_acquire+0x68/0x84 [ 15.504999] __mutex_lock+0xa4/0x3e0 [ 15.505007] mutex_lock_nested+0x40/0x70 [ 15.505012] mtk_rpmsg_ns_cb+0xe4/0x134 [mtk_rpmsg] [ 15.641684] mtk_rpmsg_ipi_handler+0x38/0x64 [mtk_rpmsg] [ 15.641693] scp_ipi_handler+0xbc/0x180 [mtk_scp] [ 15.663905] mt8192_scp_irq_handler+0x44/0xa4 [mtk_scp] [ 15.663915] scp_irq_handler+0x6c/0xa0 [mtk_scp] [ 15.685779] irq_thread_fn+0x34/0xa0 [ 15.685785] irq_thread+0x18c/0x240 [ 15.685789] kthread+0x104/0x110 [ 15.709579] ret_from_fork+0x10/0x20 [ 15.709586] [] -> #0 (&scp->ipi_desc[i].lock){+.+.}-{4:4}: [ 15.731271] __lock_acquire+0x11e4/0x1910 [ 15.740367] lock_acquire.part.0+0xd8/0x220 [ 15.749813] lock_acquire+0x68/0x84 [ 15.757861] __mutex_lock+0xa4/0x3e0 [ 15.766084] mutex_lock_nested+0x40/0x70 [ 15.775006] scp_ipi_lock+0x34/0x50 [mtk_scp_ipi] [ 15.785503] scp_ipi_register+0x40/0xa4 [mtk_scp_ipi] [ 15.796697] scp_register_ipi+0x1c/0x30 [mtk_scp] [ 15.807194] mtk_rpmsg_create_ept+0xa0/0x108 [mtk_rpmsg] [ 15.818912] rpmsg_create_ept+0x44/0x60 [ 15.827660] cros_ec_rpmsg_probe+0x15c/0x1f0 [ 15.837282] rpmsg_dev_probe+0x128/0x1d0 [ 15.846203] really_probe.part.0+0xa4/0x2a0 [ 15.855649] __driver_probe_device+0xa0/0x150 [ 15.865443] driver_probe_device+0x48/0x150 [ 15.877157] __device_attach_driver+0xc0/0x12c [ 15.889359] bus_for_each_drv+0x80/0xe0 [ 15.900330] __device_attach+0xe4/0x190 [ 15.911303] device_initial_probe+0x1c/0x2c [ 15.922969] bus_probe_device+0xa8/0xb0 [ 15.933927] device_add+0x3a8/0x8a0 [ 15.944193] device_register+0x28/0x40 [ 15.954970] rpmsg_register_device+0x5c/0xa0 [ 15.966782] mtk_register_device_work_function+0x148/0x1cc [mtk_rpmsg] [ 15.983146] process_one_work+0x294/0x664 [ 15.994458] worker_thread+0x7c/0x45c [ 16.005069] kthread+0x104/0x110 [ 16.014789] ret_from_fork+0x10/0x20 [ 16.025201] [] other info that might help us debug this: [ 16.047769] Possible unsafe locking scenario: [ 16.063942] CPU0 CPU1 [ 16.075166] ---- ---- [ 16.086376] lock(&mtk_subdev->channels_lock); [ 16.097592] lock(&scp->ipi_desc[i].lock); [ 16.113188] lock(&mtk_subdev->channels_lock); [ 16.129482] lock(&scp->ipi_desc[i].lock); [ 16.140020] [] *** DEADLOCK *** [ 16.158282] 4 locks held by kworker/0:3/155: [ 16.168978] #0: ffff5b4d00008748 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1fc/0x664 [ 16.190017] #1: ffff80000953bdc8 ((work_completion)(&mtk_subdev->register_work)){+.+.}-{0:0}, at: process_one_work+0x1fc/0x664 [ 16.215269] #2: ffff5b4d0e8f1918 (&mtk_subdev->channels_lock){+.+.}-{4:4}, at: mtk_register_device_work_function+0x50/0x1cc [mtk_rpmsg] [ 16.242131] #3: ffff5b4d05964190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x44/0x190 To solve this, simply unlock the channels_lock mutex before calling mtk_rpmsg_register_device() and relock it right after, as safety is still ensured by the locking mechanism that happens right after through SCP. Fixes: 7017996951fd ("rpmsg: add rpmsg support for mt8183 SCP.") Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20220525091201.14210-1-angelogioacchino.delregno@collabora.com Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
* rpmsg: char: Add mutex protection for rpmsg_eptdev_open()Shengjiu Wang2022-06-141-1/+6
| | | | | | | | | | | | | 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: 964e8bedd5a1 ("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>
* Merge tag 'driver-core-5.19-rc1' of ↵Linus Torvalds2022-06-033-14/+37
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * rpmsg: use local 'dev' variableKrzysztof Kozlowski2022-05-061-3/+3
| | | | | | | | | | | | | | | | | | '&rpdev->dev' is already cached as local variable, so use it to simplify the code. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220429195946.1061725-3-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * rpmsg: Fix calling device_lock() on non-initialized deviceKrzysztof Kozlowski2022-05-063-29/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: 42cd402b8fd4 ("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>
| * rpmsg: Fix kfree() of static memory on setting driver_overrideKrzysztof Kozlowski2022-04-222-4/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: 950a7388f02b ("rpmsg: Turn name service into a stand alone driver") Fixes: c0cdc19f84a4 ("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>
| * rpmsg: Constify local variable in field store macroKrzysztof Kozlowski2022-04-221-1/+2
| | | | | | | | | | | | | | | | | | 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>
* | rpmsg: qcom_smd: Fix returning 0 if irq_of_parse_and_map() failsKrzysztof Kozlowski2022-04-281-1/+1
| | | | | | | | | | | | | | | | | | | | irq_of_parse_and_map() returns 0 on failure, so this should not be passed further as error return code. Fixes: 1a358d350664 ("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
* | rpmsg: virtio: Fix the unregistration of the device rpmsg_ctrlArnaud Pouliquen2022-04-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: c486682ae1e2 ("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>
* | rpmsg: virtio: Fix possible double free in rpmsg_virtio_add_ctrl_dev()Hangyu Hua2022-04-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | vch will be free in virtio_rpmsg_release_device() when rpmsg_ctrldev_register_device() fails. There is no need to call kfree() again. Fixes: c486682ae1e2 ("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>
* | rpmsg: virtio: Fix possible double free in rpmsg_probe()Hangyu Hua2022-04-261-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | 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: c486682ae1e2 ("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>
* | rpmsg: qcom_smd: Fix irq_of_parse_and_map() return valueKrzysztof Kozlowski2022-04-221-1/+1
|/ | | | | | | | | The irq_of_parse_and_map() returns 0 on failure, not a negative ERRNO. Fixes: 53e2822e56c7 ("rpmsg: Introduce Qualcomm SMD backend") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20220422105326.78713-1-krzysztof.kozlowski@linaro.org
* rpmsg: ctrl: Introduce new RPMSG_CREATE/RELEASE_DEV_IOCTL controlsArnaud Pouliquen2022-03-131-4/+32
| | | | | | | | | | | | | | | | | | | | | | | 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
* rpmsg: char: Introduce the "rpmsg-raw" channelArnaud Pouliquen2022-03-131-0/+60
| | | | | | | | | | | | | | | | | | | | | | 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
* rpmsg: char: Add possibility to use default endpoint of the rpmsg deviceArnaud Pouliquen2022-03-131-2/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* rpmsg: char: Refactor rpmsg_chrdev_eptdev_create functionArnaud Pouliquen2022-03-131-5/+28
| | | | | | | | | | | | | 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
* rpmsg: Update rpmsg_chrdev_register_device functionArnaud Pouliquen2022-03-135-8/+8
| | | | | | | | | | | | | | | | | 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
* rpmsg: Move the rpmsg control device from rpmsg_char to rpmsg_ctrlArnaud Pouliquen2022-03-134-158/+226
| | | | | | | | | | | | | | | | | | | | | 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
* rpmsg: Create the rpmsg class in core instead of in rpmsg charArnaud Pouliquen2022-03-133-12/+16
| | | | | | | | | | | | 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
* rpmsg: char: Export eptdev create and destroy functionsArnaud Pouliquen2022-03-132-7/+57
| | | | | | | | | | | | | | | | 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: char: treat rpmsg_trysend() ENOMEM as EAGAINTim Blechmann2022-03-131-2/+5
| | | | | | | | | | | | 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
* rpmsg: qcom_smd: Fix redundant channel->registered assignmentAngeloGioacchino Del Regno2022-03-121-2/+0
| | | | | | | | | | | | | 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: 53e2822e56c7 ("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
* rpmsg: use struct_size over open coded arithmeticMinghao Chi (CGEL ZTE)2022-03-111-1/+1
| | | | | | | | | | | | | | | | | | | | 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
* rpmsg: smd: allow opening rpm_requests even if already openedLuca Weiss2022-03-111-1/+6
| | | | | | | | | 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
* rpmsg: qcom_smd: Promote to arch_initcallKonrad Dybcio2022-03-111-1/+1
| | | | | | | | | | | | 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
* Merge tag 'rpmsg-v5.17-fixes' of ↵Linus Torvalds2022-01-271-18/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * rpmsg: char: Fix race between the release of rpmsg_eptdev and cdevMatthias Kaehlcke2022-01-171-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: c0cdc19f84a4 ("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
| * rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdevSujit Kautkar2022-01-171-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct rpmsg_ctrldev contains a struct cdev. The current code frees the rpmsg_ctrldev struct in rpmsg_ctrldev_release_device(), but the cdev is a managed object, therefore its release is not predictable and the rpmsg_ctrldev could be freed before the cdev is entirely released, as in the backtrace below. [ 93.625603] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x7c [ 93.636115] WARNING: CPU: 0 PID: 12 at lib/debugobjects.c:488 debug_print_object+0x13c/0x1b0 [ 93.644799] Modules linked in: veth xt_cgroup xt_MASQUERADE rfcomm algif_hash algif_skcipher af_alg uinput ip6table_nat fuse uvcvideo videobuf2_vmalloc venus_enc venus_dec videobuf2_dma_contig hci_uart btandroid btqca snd_soc_rt5682_i2c bluetooth qcom_spmi_temp_alarm snd_soc_rt5682v [ 93.715175] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.4.163-lockdep #26 [ 93.723855] Hardware name: Google Lazor (rev3 - 8) with LTE (DT) [ 93.730055] Workqueue: events kobject_delayed_cleanup [ 93.735271] pstate: 60c00009 (nZCv daif +PAN +UAO) [ 93.740216] pc : debug_print_object+0x13c/0x1b0 [ 93.744890] lr : debug_print_object+0x13c/0x1b0 [ 93.749555] sp : ffffffacf5bc7940 [ 93.752978] x29: ffffffacf5bc7940 x28: dfffffd000000000 [ 93.758448] x27: ffffffacdb11a800 x26: dfffffd000000000 [ 93.763916] x25: ffffffd0734f856c x24: dfffffd000000000 [ 93.769389] x23: 0000000000000000 x22: ffffffd0733c35b0 [ 93.774860] x21: ffffffd0751994a0 x20: ffffffd075ec27c0 [ 93.780338] x19: ffffffd075199100 x18: 00000000000276e0 [ 93.785814] x17: 0000000000000000 x16: dfffffd000000000 [ 93.791291] x15: ffffffffffffffff x14: 6e6968207473696c [ 93.796768] x13: 0000000000000000 x12: ffffffd075e2b000 [ 93.802244] x11: 0000000000000001 x10: 0000000000000000 [ 93.807723] x9 : d13400dff1921900 x8 : d13400dff1921900 [ 93.813200] x7 : 0000000000000000 x6 : 0000000000000000 [ 93.818676] x5 : 0000000000000080 x4 : 0000000000000000 [ 93.824152] x3 : ffffffd0732a0fa4 x2 : 0000000000000001 [ 93.829628] x1 : ffffffacf5bc7580 x0 : 0000000000000061 [ 93.835104] Call trace: [ 93.837644] debug_print_object+0x13c/0x1b0 [ 93.841963] __debug_check_no_obj_freed+0x25c/0x3c0 [ 93.846987] debug_check_no_obj_freed+0x18/0x20 [ 93.851669] slab_free_freelist_hook+0xbc/0x1e4 [ 93.856346] kfree+0xfc/0x2f4 [ 93.859416] rpmsg_ctrldev_release_device+0x78/0xb8 [ 93.864445] device_release+0x84/0x168 [ 93.868310] kobject_cleanup+0x12c/0x298 [ 93.872356] kobject_delayed_cleanup+0x10/0x18 [ 93.876948] process_one_work+0x578/0x92c [ 93.881086] worker_thread+0x804/0xcf8 [ 93.884963] kthread+0x2a8/0x314 [ 93.888303] ret_from_fork+0x10/0x18 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: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface") Signed-off-by: Sujit Kautkar <sujitka@chromium.org> Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20220110104706.v6.1.Iaac908f3e3149a89190ce006ba166e2d3fd247a3@changeid
* | Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2022-01-181-1/+1
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * virtio: wrap config->reset callsMichael S. Tsirkin2022-01-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | 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>
* | rpmsg: core: Clean up resources on announce_create failure.Arnaud Pouliquen2021-12-081-4/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: 5e619b48677c ("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>
* | rpmsg: Fix documentation return formattingArnaud Pouliquen2021-11-184-15/+15
| | | | | | | | | | | | | | | | | | | | 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>
* | rpmsg: char: Add pr_fmt() to prefix messagesArnaud Pouliquen2021-11-181-2/+5
|/ | | | | | | | | Make all messages to be prefixed in a unified way. Add pr_fmt() to achieve this. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> Link: https://lore.kernel.org/r/20211108135945.3364-1-arnaud.pouliquen@foss.st.com Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
* Merge tag 'rproc-v5.16' of ↵Linus Torvalds2021-11-101-2/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ...
| * rpmsg: char: Remove useless includeArnaud Pouliquen2021-10-081-2/+0
| | | | | | | | | | | | | | | | | | No facility requests the include of rpmsg_internal.h header file. 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/20210712123752.10449-2-arnaud.pouliquen@foss.st.com
* | Merge tag 'rpmsg-v5.16' of ↵Linus Torvalds2021-11-103-11/+84
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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()
| * | rpmsg: glink: Send READ_NOTIFY command in FIFO full caseArun Kumar Neelakantam2021-10-151-1/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * | rpmsg: glink: Remove channel decouple from rpdev releaseChris Lew2021-10-151-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * | rpmsg: glink: Remove the rpmsg dev in close_ackArun Kumar Neelakantam2021-10-151-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * | rpmsg: glink: Add TX_DATA_CONT command while sendingArun Kumar Neelakantam2021-10-151-4/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
| * | rpmsg: virtio_rpmsg_bus: use dev_warn_ratelimited for msg with no recipientAlexandru Ardelean2021-10-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Even though it may be user-space's fault for this error (some application terminated or crashed without cleaning up it's endpoint), the rpmsg communication should not overflow the syslog with too many messages. A dev_warn_ratelimited() seems like a good alternative in case this can occur. Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20210928132902.1594277-1-aardelean@deviqon.com
| * | rpmsg: virtio: Remove unused including <linux/of_device.h>Cai Huoqing2021-10-081-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | Remove including <linux/of_device.h> that don't need it. Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20210811123125.143-1-caihuoqing@baidu.com
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