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path: root/drivers/rpmsg/qcom_glink_native.c (follow)
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2022-07-16rpmsg: convert sysfs snprintf to sysfs_emitXuezhi Zhang1-1/+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
2022-07-16rpmsg: qcom: glink: remove unused nameKrzysztof Kozlowski1-6/+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
2022-07-16rpmsg: qcom: glink: replace strncpy() with strscpy_pad()Krzysztof Kozlowski1-1/+1
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
2022-03-13rpmsg: Update rpmsg_chrdev_register_device functionArnaud Pouliquen1-1/+1
The rpmsg_chrdev driver has been replaced by the rpmsg_ctrl driver for the /dev/rpmsg_ctrlX devices management.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
2022-03-11rpmsg: use struct_size over open coded arithmeticMinghao Chi (CGEL ZTE)1-1/+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
2021-11-18rpmsg: Fix documentation return formattingArnaud Pouliquen1-1/+1
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>
2021-10-15rpmsg: glink: Send READ_NOTIFY command in FIFO full caseArun Kumar Neelakantam1-1/+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
2021-10-15rpmsg: glink: Remove channel decouple from rpdev releaseChris Lew1-2/+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
2021-10-15rpmsg: glink: Remove the rpmsg dev in close_ackArun Kumar Neelakantam1-0/+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
2021-10-15rpmsg: glink: Add TX_DATA_CONT command while sendingArun Kumar Neelakantam1-4/+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
2021-09-13rpmsg: glink: Replace strncpy() with strscpy_pad()Kees Cook1-1/+1
The use of strncpy() is considered deprecated for NUL-terminated strings[1]. Replace strncpy() with strscpy_pad() (as it seems this case expects the NUL padding to fill the allocation following the flexible array). This additionally silences a warning seen when building under -Warray-bounds: ./include/linux/fortify-string.h:38:30: warning: '__builtin_strncpy' offset 24 from the object at '__mptr' is out of the bounds of referenced subobject 'data' with type 'u8[]' {aka 'unsigned char[]'} at offset 24 [-Warray-bounds] 38 | #define __underlying_strncpy __builtin_strncpy | ^ ./include/linux/fortify-string.h:50:9: note: in expansion of macro '__underlying_strncpy' 50 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ drivers/rpmsg/qcom_glink_native.c: In function 'qcom_glink_work': drivers/rpmsg/qcom_glink_native.c:36:5: note: subobject 'data' declared here 36 | u8 data[]; | ^~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings Cc: Andy Gross <agross@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: linux-arm-msm@vger.kernel.org Cc: linux-remoteproc@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/lkml/20210728020745.GB35706@embeddedor Link: https://lore.kernel.org/r/20210818060533.3569517-4-keescook@chromium.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2021-04-09rpmsg: qcom_glink_native: fix error return code of qcom_glink_rx_data()Jia-Ju Bai1-0/+1
When idr_find() returns NULL to intent, no error return code of qcom_glink_rx_data() is assigned. To fix this bug, ret is assigned with -ENOENT in this case. Fixes: 64f95f87920d ("rpmsg: glink: Use the local intents when receiving data") Reported-by: TOTE Robot <oslab@tsinghua.edu.cn> Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Link: https://lore.kernel.org/r/20210306133624.17237-1-baijiaju1990@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2021-03-17rpmsg: char: Use rpmsg_sendto to specify the message destination addressArnaud Pouliquen1-0/+16
When the endpoint device is created by the application, a destination address is specified in the rpmsg_channel_info structure. Since the rpmsg_endpoint structure does not store the destination address, this destination address must be specified when sending a message. Replaces rpmsg_send with rpmsg_sendto to allow to specify the destination address. This implementation is requested for compatibly with some rpmsg backends like the virtio backend. For this, the GLINK an SMD drivers have been updated to support the rpmsg_sendto, even if the destination address is ignored for these backends. For these drivers, the rpmsg_send and rpmsg_trysend ops are preserved to avoid breaking the legacy. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20210311140413.31725-5-arnaud.pouliquen@foss.st.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-10-22Merge tag 'rpmsg-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteprocLinus Torvalds1-3/+67
Pull rpmsg updates from Bjorn Andersson: "This introduces rpmsg_char support for GLINK and fixes a few issues" * tag 'rpmsg-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc: rpmsg: glink: Expose rpmsg name attr for glink rpmsg: glink: Add support for rpmsg glink chrdev rpmsg: Guard against null endpoint ops in destroy rpmsg: glink: Use complete_all for open states rpmsg: virtio: fix compilation warning for virtio_rpmsg_channel description rpmsg: Avoid double-free in mtk_rpmsg_register_device rpmsg: smd: Fix a kobj leak in in qcom_smd_parse_edge()
2020-09-15rpmsg: glink: Expose rpmsg name attr for glinkChris Lew1-0/+26
Expose the name field as an attr so clients listening to uevents for rpmsg can identify the edge the events correspond to. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org> Link: https://lore.kernel.org/r/1593017121-7953-5-git-send-email-deesin@codeaurora.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-09-15rpmsg: glink: Add support for rpmsg glink chrdevDeepak Kumar Singh1-0/+38
RPMSG provides a char device interface to userspace. Probe the rpmsg chrdev channel to enable the rpmsg_ctrl device creation on glink transports. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org> Link: https://lore.kernel.org/r/1593017121-7953-4-git-send-email-deesin@codeaurora.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-09-15rpmsg: glink: Use complete_all for open statesChris Lew1-3/+3
The open_req and open_ack completion variables are the state variables to represet a remote channel as open. Use complete_all so there are no races with waiters and using completion_done. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org> Link: https://lore.kernel.org/r/1593017121-7953-2-git-send-email-deesin@codeaurora.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva1-2/+2
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2019-10-17rpmsg: glink: Free pending deferred work on removeBjorn Andersson1-1/+13
By just cancelling the deferred rx worker during GLINK instance teardown any pending deferred commands are leaked, so free them. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Cc: stable@vger.kernel.org Acked-by: Chris Lew <clew@codeaurora.org> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-10-17rpmsg: glink: Don't send pending rx_done during removeBjorn Andersson1-3/+12
Attempting to transmit rx_done messages after the GLINK instance is being torn down will cause use after free and memory leaks. So cancel the intent_work and free up the pending intents. With this there are no concurrent accessors of the channel left during qcom_glink_native_remove() and there is therefor no need to hold the spinlock during this operation - which would prohibit the use of cancel_work_sync() in the release function. So remove this. Fixes: 1d2ea36eead9 ("rpmsg: glink: Add rx done command") Cc: stable@vger.kernel.org Acked-by: Chris Lew <clew@codeaurora.org> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-10-16rpmsg: glink: Fix rpmsg_register_device err handlingChris Lew1-3/+1
The device release function is set before registering with rpmsg. If rpmsg registration fails, the framework will call device_put(), which invokes the release function. The channel create logic does not need to free rpdev if rpmsg_register_device() fails and release is called. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Cc: stable@vger.kernel.org Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-10-16rpmsg: glink: Put an extra reference during cleanupChris Lew1-0/+4
In a remote processor crash scenario, there is no guarantee the remote processor sent close requests before it went into a bad state. Remove the reference that is normally handled by the close command in the so channel resources can be released. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Cc: stable@vger.kernel.org Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Chris Lew <clew@codeaurora.org> Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-10-16rpmsg: glink: Fix use after free in open_ack TIMEOUT caseArun Kumar Neelakantam1-4/+3
Extra channel reference put when remote sending OPEN_ACK after timeout causes use-after-free while handling next remote CLOSE command. Remove extra reference put in timeout case to avoid use-after-free. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Cc: stable@vger.kernel.org Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-10-16rpmsg: glink: Fix reuse intents memory leak issueArun Kumar Neelakantam1-0/+9
Memory allocated for re-usable intents are not freed during channel cleanup which causes memory leak in system. Check and free all re-usable memory to avoid memory leak. Fixes: 933b45da5d1d ("rpmsg: glink: Add support for TX intents") Cc: stable@vger.kernel.org Acked-By: Chris Lew <clew@codeaurora.org> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2019-08-29rpmsg: glink: Use struct_size() helperGustavo A. R. Silva1-1/+1
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct { ... struct intent_pair intents[]; } __packed * msg; Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. So, replace the following form: sizeof(*msg) + sizeof(struct intent_pair) * count with: struct_size(msg, intents, count) This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-09-01rpmsg: glink: Remove chunk size word align warningChris Lew1-3/+0
It is possible for the chunk sizes coming from the non RPM remote procs to not be word aligned. Remove the alignment warning and continue to read from the FIFO so execution is not stalled. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30rpmsg: glink: Store edge name for glink deviceChris Lew1-0/+6
Channels may need to identify the edge their channel was probed for. Store the edge name by reading the label property from device tree or default to the node name. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30rpmsg: glink: Fix various kerneldoc warnings.Srinivas Kandagatla1-16/+19
Fix below kerneldoc warnings while building with W=1 qcom_glink_native.c:53: warning: Function parameter or member 'data' not described in 'glink_defer_cmd' qcom_glink_native.c:75: warning: Function parameter or member 'data' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'id' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'size' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'reuse' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'in_use' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'offset' not described in 'glink_core_rx_intent' qcom_glink_native.c:75: warning: Function parameter or member 'node' not described in 'glink_core_rx_intent' qcom_glink_native.c:116: warning: Function parameter or member 'features' not described in 'qcom_glink' qcom_glink_native.c:116: warning: Function parameter or member 'intentless' not described in 'qcom_glink' qcom_glink_native.c:524: warning: Function parameter or member 'version' not described in 'qcom_glink_receive_version' qcom_glink_native.c:524: warning: Function parameter or member 'features' not described in 'qcom_glink_receive_version' qcom_glink_native.c:524: warning: Excess function parameter 'r_version' description in 'qcom_glink_receive_version' qcom_glink_native.c:524: warning: Excess function parameter 'r_features' description in 'qcom_glink_receive_version' qcom_glink_native.c:551: warning: Function parameter or member 'version' not described in 'qcom_glink_receive_version_ack' qcom_glink_native.c:551: warning: Function parameter or member 'features' not described in 'qcom_glink_receive_version_ack' qcom_glink_native.c:551: warning: Excess function parameter 'r_version' description in 'qcom_glink_receive_version_ack' qcom_glink_native.c:551: warning: Excess function parameter 'r_features' description in 'qcom_glink_receive_version_ack' qcom_glink_native.c:570: warning: bad line: wire format and transmit qcom_glink_native.c:604: warning: Function parameter or member 'intent' not described in 'qcom_glink_advertise_intent' qcom_glink_native.c:604: warning: Excess function parameter 'size' description in 'qcom_glink_advertise_intent' qcom_glink_native.c:710: warning: Function parameter or member 'glink' not described in 'qcom_glink_handle_intent_req' qcom_glink_native.c:710: warning: Function parameter or member 'cid' not described in 'qcom_glink_handle_intent_req' qcom_glink_native.c:710: warning: Function parameter or member 'size' not described in 'qcom_glink_handle_intent_req' Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-07-30rpmsg: glink: correctly annotate intent membersSrinivas Kandagatla1-5/+5
As intent structure members are not correctly annotated, leading to below warnings qcom_glink_native.c:614:16: warning: incorrect type in assignment (different base types) qcom_glink_native.c:614:16: expected unsigned short [unsigned] [usertype] id qcom_glink_native.c:614:16: got restricted __le16 [usertype] <noident> qcom_glink_native.c:615:18: warning: incorrect type in assignment (different base types) qcom_glink_native.c:615:18: expected unsigned short [unsigned] [usertype] lcid qcom_glink_native.c:615:18: got restricted __le16 [usertype] <noident> qcom_glink_native.c:616:19: warning: incorrect type in assignment (different base types) qcom_glink_native.c:616:19: expected unsigned int [unsigned] [usertype] count qcom_glink_native.c:616:19: got restricted __le32 [usertype] <noident> qcom_glink_native.c:617:18: warning: incorrect type in assignment (different base types) qcom_glink_native.c:617:18: expected unsigned int [unsigned] [usertype] size qcom_glink_native.c:617:18: got restricted __le32 [usertype] <noident> qcom_glink_native.c:618:18: warning: incorrect type in assignment (different base types) qcom_glink_native.c:618:18: expected unsigned int [unsigned] [usertype] liid qcom_glink_native.c:618:18: got restricted __le32 [usertype] <noident> Fix this by correctly annotating them. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-06-03rpmsg: glink: Switch to SPDX license identifierSuman Anna1-9/+1
Use the appropriate SPDX license identifier in various rpmsg glink driver source files and drop the previous boilerplate license text. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-03-20rpmsg: glink: Use spinlock in tx pathBjorn Andersson1-7/+11
Switch the tx_lock to a spinlock we allow clients to use rpmsg_trysend() from atomic context. In order to allow clients to sleep while waiting for space in the FIFO we release the lock temporarily around the delay; which should be replaced by sending a READ_NOTIF and waiting for the remote to signal us that space has been made available. Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2018-01-02rpmsg: glink: Fix missing mutex_init() in qcom_glink_alloc_channel()Wei Yongjun1-0/+1
qcom_glink_alloc_channel() allocates the mutex but not initialize it. Use mutex_init() on it to initialize it correctly. This is detected by Coccinelle semantic patch. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-11-15rpmsg: glink: The mbox client knows_txdoneBjorn Andersson1-0/+1
As the GLINK driver is ticking the txdone of the mailbox channel (to implement the doorbell) it needs to set knows_txdone. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-11-14rpmsg: glink: Add missing MODULE_LICENSEBjorn Andersson1-0/+3
The qcom_glink_native driver is missing a MODULE_LICENSE(), correct this. Fixes: 835764ddd9af ("rpmsg: glink: Move the common glink protocol implementation to glink_native.c") Cc: stable@vger.kernel.org Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-10-30rpmsg: glink: Use best fit intent during txChris Lew1-3/+8
Intents can vary in size, try to find the best fitting remote intent instead of first fit when sending a message to the remote proc. Signed-off-by: Chris Lew <clew@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-10-30rpmsg: glink: Add support to preallocate intentsChris Lew1-8/+27
The base intents prequeued during channel creation may not satisfy a channel's throughput requirement. Add support for intents dt-binding to allow channels to specify the size and amount of intents to prequeue during endpoint announcement. Signed-off-by: Chris Lew <clew@codeaurora.org> [bjorn: Altered how defaults are expressed] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-10-30rpmsg: glink: Initialize the "intent_req_comp" completion variableArun Kumar Neelakantam1-0/+1
The "intent_req_comp" variable is used without initialization which results in NULL pointer dereference in qcom_glink_request_intent(). we need to initialize the completion variable before using it. Fixes: 27b9c5b66b23 ("rpmsg: glink: Request for intents when unavailable") Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-10-10rpmsg: glink: Fix memory leak in qcom_glink_alloc_intent()Dan Carpenter1-3/+8
We need to free "intent" and "intent->data" on a couple error paths. Fixes: 933b45da5d1d ("rpmsg: glink: Add support for TX intents") Acked-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-10-10rpmsg: glink: Unlock on error in qcom_glink_request_intent()Dan Carpenter1-1/+2
If qcom_glink_tx() fails, then we need to unlock before returning the error code. Fixes: 27b9c5b66b23 ("rpmsg: glink: Request for intents when unavailable") Acked-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-09-04rpmsg: glink: initialize ret to zero to ensure error status check is correctColin Ian King1-3/+1
The new switch cases for RPM_CMD_RX_DONE, RPM_CMD_RX_DONE_W_REUSE, RPM_CMD_RX_INTENT_REQ_ACK, RPM_CMD_INTENT and RPM_CMD_RX_INTENT_REQ from 4 recent commits are not setting ret and so a later non-zero check on ret is testing on a garbage value in ret. Fix this by initializing ret to zero. Detected by CoverityScan CID#1455249 ("Uninitialized scalar variable") Fixes: 933b45da5d1d ("rpmsg: glink: Add support for TX intents) Fixes: dacbb35e930f ("glink: Receive and store the remote intent buffers") Fixes: 27b9c5b66b23 ("rpmsg: glink: Request for intents when unavailable") Fixes: 88c6060f5a7f ("rpmsg: glink: Handle remote rx done command") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-09-04rpmsg: glink: fix null pointer dereference on a null intentColin Ian King1-1/+1
In the case where glink->intentless is true and the call to qcom_glink_tx fails then we have a condition where ret is non-zero and intent is null, causing a null pointer deference when setting intent->in_use to false. Add an extra check to only dereference intent if intent is non-null. Detected by: CoverityScan CID#1455247 ("Explicit null dereferenced") Fixes: 88c6060f5a7f ("rpmsg: glink: Handle remote rx done command") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-31rpmsg: glink: Export symbols from common codeBjorn Andersson1-0/+3
The common code needs to export the probe and remove symbols in order for the SMEM and RPM drivers to access them when compiled as a module. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-30rpmsg: glink: Release idr lock before returning on errorBjorn Andersson1-1/+1
The idr_lock should be released in the case that we don't find the given channel. Fixes: 44f6df922a26 ("rpmsg: glink: Fix idr_lock from mutex to spinlock") Reported-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Handle remote rx done commandSricharan R1-0/+42
Once the remote side sends a rx done ack, check for the intent reuse information from it and suitably discard or reuse the remote passed intent buffers. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Request for intents when unavailableSricharan R1-2/+74
While sending data, we search for suitable sized intent to map and simply fail if a intent is not found. Instead request for a intent of required size and wait till one is alloted. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Use the intents passed by remoteSricharan R1-2/+33
While sending data, use the remote intent id buffer of suitable size that was passed by remote previously. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Receive and store the remote intent buffersSricharan R1-1/+70
Just like we allocating and sending intent ids to remote, remote side allocates and sends us the intents as well. So save the intent ids and use it later while sending data targeting the appropriate intents based on the size. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Add announce_create ops and preallocate intentsSricharan R1-0/+21
Preallocate local intent buffers and pass the intent ids to the remote. This way there are some default intents available for the remote to start sending data without having to wait by sending intent requests. Do this by adding the rpmsg announce_create ops, which gets called right after the rpmsg device gets probed. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Add rx done commandSricharan R1-0/+83
Send RX data receive ack to remote and also inform that local intent buffer is used and freed. This informs the remote to request for next set of intent buffers before doing a send operation. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2017-08-29rpmsg: glink: Make RX FIFO peak accessor to take an offsetBjorn Andersson1-8/+7
To fully read the received rx data from FIFO both the command and data has to be read. Currently we read command, data separately and process them. By adding an offset parameter to RX FIFO peak accessor, command and data can be read together, simplifying things. So introduce this. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
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