linux-stable.git/include/linux/remoteproc.h, branch v5.12.2

remoteproc: coredump: Add minidump functionality

2020-12-10T19:14:37+00:00

This change adds a new kind of core dump mechanism which instead of dumping
entire program segments of the firmware, dumps sections of the remoteproc
memory which are sufficient to allow debugging the firmware. This function
thus uses section headers instead of program headers during creation of the
core dump elf.

Reviewed-by: Bjorn Andersson 
Co-developed-by: Rishabh Bhatnagar 
Signed-off-by: Rishabh Bhatnagar 
Signed-off-by: Siddharth Gupta 
Link: https://lore.kernel.org/r/1605819935-10726-3-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson

remoteproc: core: Add ops to enable custom coredump functionality

2020-12-10T19:14:04+00:00

Each remoteproc might have different requirements for coredumps and might
want to choose the type of dumps it wants to collect. This change allows
remoteproc drivers to specify their own custom dump function to be executed
in place of rproc_coredump. If the coredump op is not specified by the
remoteproc driver it will be set to rproc_coredump by default.

Reviewed-by: Bjorn Andersson 
Signed-off-by: Siddharth Gupta 
Link: https://lore.kernel.org/r/1605819935-10726-2-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson

remoteproc: Add a rproc_set_firmware() API

2020-11-26T05:05:24+00:00

A new API, rproc_set_firmware() is added to allow the remoteproc platform
drivers and remoteproc client drivers to be able to configure a custom
firmware name that is different from the default name used during
remoteproc registration. This function is being introduced to provide
a kernel-level equivalent of the current sysfs interface to remoteproc
client drivers, and can only change firmwares when the remoteproc is
offline. This allows some remoteproc drivers to choose different firmwares
at runtime based on the functionality the remote processor is providing.
The TI PRU Ethernet driver will be an example of such usage as it
requires to use different firmwares for different supported protocols.

Also, update the firmware_store() function used by the sysfs interface
to reuse this function to avoid code duplication.

Reviewed-by: Rishabh Bhatnagar 
Signed-off-by: Suman Anna 
Link: https://lore.kernel.org/r/20201121032042.6195-1-s-anna@ti.com
Signed-off-by: Bjorn Andersson

remoteproc: Change default dump configuration to "disabled"

2020-10-14T00:20:54+00:00

Currently "default" configuration option means coredumps are
enabled. To avoid confusion rename the "default" configuration
option to "enabled" and disable collection of dumps by default
as doing so makes sense for production devices.

Signed-off-by: Rishabh Bhatnagar 
Link: https://lore.kernel.org/r/1601662144-5964-2-git-send-email-rishabhb@codeaurora.org
Signed-off-by: Bjorn Andersson

remoteproc: Add remoteproc character device interface

2020-08-05T03:16:37+00:00

Add the character device interface into remoteproc framework.
This interface can be used in order to boot/shutdown remote
subsystems and provides a basic ioctl based interface to implement
supplementary functionality. An ioctl call is implemented to enable
the shutdown on release feature which will allow remote processors to
be shutdown when the controlling userspace application crashes or hangs.

Reviewed-by: Bjorn Andersson 
Reviewed-by: Mathieu Poirier 
Signed-off-by: Rishabh Bhatnagar 
Signed-off-by: Siddharth Gupta 
Link: https://lore.kernel.org/r/1596044401-22083-2-git-send-email-sidgup@codeaurora.org
[bjorn: s/int32_t/s32/ per checkpatch]
Signed-off-by: Bjorn Andersson

remoteproc: Add inline coredump functionality

2020-07-21T21:03:57+00:00

The current coredump implementation uses vmalloc area to copy
all the segments. But this might put strain on low memory targets
as the firmware size sometimes is in tens of MBs. The situation
becomes worse if there are multiple remote processors undergoing
recovery at the same time. This patch adds inline coredump
functionality that avoids extra memory usage. This requires
recovery to be halted until data is read by userspace and free
function is called.

Reviewed-by: Bjorn Andersson 
Reviewed-by: Sibi Sankar 
Reviewed-by: Mathieu Poirier 
Signed-off-by: Rishabh Bhatnagar 
Tested-by: Sibi Sankar 
Link: https://lore.kernel.org/r/1594938035-7327-5-git-send-email-rishabhb@codeaurora.org
Signed-off-by: Bjorn Andersson

remoteproc: Pass size and offset as arguments to segment dump function

2020-07-21T21:03:37+00:00

Change the segment dump API signature to include size and offset
arguments. Refactor the qcom_q6v5_mss driver to use these
arguments while copying the segment. Doing this lays the ground
work for "inline" coredump functionality being added in the next
patch.

Tested-by: Sibi Sankar 
Reviewed-by: Bjorn Andersson 
Reviewed-by: Sibi Sankar 
Reviewed-by: Mathieu Poirier 
Signed-off-by: Rishabh Bhatnagar 
Link: https://lore.kernel.org/r/1594938035-7327-4-git-send-email-rishabhb@codeaurora.org
Signed-off-by: Bjorn Andersson

remoteproc: Make function rproc_resource_cleanup() public

2020-07-18T00:34:43+00:00

Make function rproc_resource_cleanup() public so that it can be
used by platform drivers when allocating resources to be used by
a detached remote processor.

Acked-by: Arnaud Pouliquen 
Signed-off-by: Mathieu Poirier 
Link: https://lore.kernel.org/r/20200714200445.1427257-8-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson

remoteproc: Properly handle firmware name when attaching

2020-07-17T06:06:15+00:00

This patch prevents the firmware image name from being displayed when
the remoteproc core is attaching to a remote processor. This is needed
needed since there is no guarantee about the nature of the firmware
image that is loaded by the external entity.

Signed-off-by: Mathieu Poirier 
Reviewed-by: Arnaud Pouliquen 
Reviewed-by: Bjorn Andersson 
Tested-by: Arnaud Pouliquen 
Link: https://lore.kernel.org/r/20200714195035.1426873-10-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson

remoteproc: Add new attach() remoteproc operation

2020-07-17T06:06:07+00:00

Add an new attach() operation in order to properly deal with
scenarios where the remoteproc core needs to attach to a
remote processor that has been booted by another entity.

Signed-off-by: Mathieu Poirier 
Reviewed-by: Bjorn Andersson 
Tested-by: Arnaud Pouliquen 
Link: https://lore.kernel.org/r/20200714195035.1426873-3-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson