kernel/drivers/soc/qcom/rmtfs_mem.c, branch linux-6.2.y

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284

2019-06-05T15:36:37Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 and only version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 294 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de Signed-off-by: Greg Kroah-Hartman

soc: qcom: rmtfs: Add support for mmap functionality

2019-03-28T04:32:25Z

This change adds mmap functionality to rmtfs_mem driver. Userspace application can map the address and use this mapped address directly as buffer for read/write call to disk. and avoid the read/write call to the shared path to copy the buffer to userspace application. Reviewed-by: Bjorn Andersson Signed-off-by: Ankit Jain Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: rmtfs-mem: Make sysfs attributes world-readable

2019-02-01T22:08:34Z

In order to run an rmtfs daemon as an unprivileged user, that user would need access to the phys_addr and size sysfs attributes. Sharing these attributes with unprivileged users doesn't really leak anything sensitive, since if you have access to physical memory, the jig is up anyway. Make those attributes readable by all. Reviewed-by: Brian Norris Reviewed-by: Bjorn Andersson Signed-off-by: Evan Green Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: rmtfs-mem: Add class to enable uevents

2019-02-01T22:08:27Z

Currently the qcom_rmtfs_memN devices are entirely invisible to the udev world. Add a class to the rmtfs device so that uevents fire when the device is added. Reviewed-by: Brian Norris Reviewed-by: Bjorn Andersson Signed-off-by: Evan Green Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: rmtfs-mem: Validate that scm is available

2018-09-13T21:11:39Z

The scm device must be present in order for the rmtfs driver to configure memory permissions for the rmtfs memory region, so check that it is probed before continuing. Cc: stable@vger.kernel.org Fixes: fa65f8045137 ("soc: qcom: rmtfs-mem: Add support for assigning memory to remote") Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: rmtfs-mem: fix memleak in probe error paths

2018-07-21T19:53:47Z

Make sure to set the mem device release callback before calling put_device() in a couple of probe error paths so that the containing object also gets freed. Fixes: d1de6d6c639b ("soc: qcom: Remote filesystem memory driver") Cc: stable # 4.15 Cc: Bjorn Andersson Signed-off-by: Johan Hovold Signed-off-by: Andy Gross

soc: qcom: rmtfs-mem: Add support for assigning memory to remote

2018-03-09T00:40:24Z

On some platform the remote processor's memory map is not statically configured in TrustZone, so each memory region that is to be accessed by the remote needs a call into TrustZone to set up the remote's permissions. Implement this for the rmtfs memory driver, to give the modem on 8996 access to the shared file system buffers. Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross

soc: qcom: rmtfs_mem: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE

2017-12-20T21:38:34Z

This change resolves a new compile-time warning when built as a loadable module: WARNING: modpost: missing MODULE_LICENSE() in drivers/soc/qcom/rmtfs_mem.o see include/linux/module.h for more information This adds the license as "GPL v2", which matches the header of the file. MODULE_DESCRIPTION and MODULE_AUTHOR are also added. Signed-off-by: Jesse Chan Signed-off-by: Andy Gross

soc: qcom: remove unused label

2017-11-03T12:24:56Z

The newly added driver comes with a harmless warning: drivers/soc/qcom/rmtfs_mem.c: In function 'qcom_rmtfs_mem_probe': drivers/soc/qcom/rmtfs_mem.c:211:1: error: label 'remove_cdev' defined but not used [-Werror=unused-label] This removes the unused label to avoid the warning. Fixes: 702baebb8e00 ("soc: qcom: Remote filesystem memory driver") Signed-off-by: Arnd Bergmann

soc: qcom: Remote filesystem memory driver

2017-10-22T10:06:34Z

The Qualcomm remote file system protocol is used by certain remoteprocs, in particular the modem, to read and write persistent storage in platforms where only the application CPU has physical storage access. The protocol is based on a set of QMI-encoded control-messages and a shared memory buffer for exchaning the data. This driver implements the latter, providing the user space service access to the carved out chunk of memory. Acked-by: Rob Herring Signed-off-by: Bjorn Andersson Signed-off-by: Andy Gross