Instead of using the driver-specific rtsx_pci_update_cfg_byte() to update
the PCIe Link Control Register, use pcie_capability_clear_and_set_word()
like the rest of the kernel does. This makes it easier to maintain ASPM
across the PCI core and drivers.
Remove the now-unused rtsx_pci_update_cfg_byte() and ASPM_MASK_NEG
definitions.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20200521180545.1159896-5-helgaas@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use ASPM_MASK_NEG instead of hard-coded value, as other callers of
rtsx_pci_update_cfg_byte() do. No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20200521180545.1159896-4-helgaas@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The struct rtsx_cr_option.dev_aspm_mode member is never set to anything
other than DEV_ASPM_DYNAMIC (0). Remove it and code that tests it. No
functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20200521180545.1159896-3-helgaas@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The MHI device may be in the syserr state when we attempt to init it in
power_up(). Since we have no local state, the handling is simple -
reset the device and wait for it to transition out of the reset state.
Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-15-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Take write lock only to protect db_mode member of mhi channel.
This allows rest of the mhi channels to just take read lock which
fine grains the locking. It prevents channel readers to starve if
they try to enter critical section after a writer.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-14-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Devices that support RDDM do not require processing SYS_ERROR as it is
deemed redundant. Avoid SYS_ERROR processing if RDDM is supported by
the device.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-13-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver continues handling of BHI interrupt even if MHI register access
is not allowed. By doing so it calls the status call back and performs
early notification for the MHI client. This is not needed when MHI
register access is not allowed. Hence skip the handling in this case and
return. Also add debug log to print device state, local EE and device EE
when reg access is valid.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-12-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mission mode transition is handled by state worker thread but
power off is not. There is a possibility while mission mode
transition is in progress which calls MHI client driver probe,
power off is issued by MHI controller. This results into client
driver probe and remove running in parallel and causes use after
free situation. By queuing disable transition work when mission
mode is in progress prevents the race condition.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-11-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the system error worker thread and instead have the
execution environment worker handle that transition to serialize
processing and avoid any possible race conditions during
shutdown.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-10-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
While writing any sequence or session identifiers, it is possible that
the host could write a zero value, whereas only non-zero values should
be supported writes to those registers. Ensure that the host does not
write a non-zero value for them and also log them in debug messages. A
macro is introduced to simplify this check and the existing checks are
also converted to use this macro.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-9-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When loading AMSS firmware using BHIe protocol, return -ETIMEDOUT if no
response is received within the timeout or return -EIO in case of a
protocol returned failure or an MHI error state.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-7-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Upon power up, driver queues firmware worker thread if the execution
environment is PBL. Firmware worker is blocked with a timeout until
state worker gets a chance to run and unblock firmware worker. An
endpoint power up failure can be seen if state worker gets a chance to
run after firmware worker has timed out. Remove this dependency and
handle firmware load directly using state worker thread.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-6-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When MHI Driver receives an EOT event, it reads xfer_len from the
event in the last TRE. The value is under control of the MHI device
and never validated by Host MHI driver. The value should never be
larger than the real size of the buffer but a malicious device can
set the value 0xFFFF as maximum. This causes driver to memory
overflow (both read or write). Fix this issue by reading minimum of
transfer length from event and the buffer length provided.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MHI data completion handler function reads channel id from event
ring element. Value is under the control of MHI devices and can be
any value between 0 and 255. In order to prevent out of bound access
add a bound check against the max channel supported by controller
and skip processing of that event ring element.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver is using zero initialized intmod value from mhi channel when
configuring TRE for bei field. This prevents interrupt moderation to
take effect in case it is supported by an event ring. Fix this by
copying intmod value from associated event ring to mhi channel upon
registering mhi controller.
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Move all the common code to generate TRE from mhi_queue_buf,
mhi_queue_dma and mhi_queue_skb to mhi_gen_tre. This helps
to centralize the TRE generation code which makes any future
bug fixing easier to manage in these APIs.
Suggested-by: Jeffrey Hugo <jhugo@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200521170249.21795-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This contains sdw_master_device patches and other updates done by Intel
folks.
Details:
- sdw_master_device to represent the master instances.
- sysfs properties for sdw_master_device and sdw_slave.
- Documentation update for TDM modes.
- some code cleanup patches and odd updates.
-----BEGIN PGP SIGNATURE-----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=5MsU
-----END PGP SIGNATURE-----
Merge tag 'soundwire-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire into char-misc-next
Vinod writes:
soundwire updates for v5.8-rc1
This contains sdw_master_device patches and other updates done by Intel
folks.
Details:
- sdw_master_device to represent the master instances.
- sysfs properties for sdw_master_device and sdw_slave.
- Documentation update for TDM modes.
- some code cleanup patches and odd updates.
* tag 'soundwire-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
soundwire: intel: use a single module
soundwire: fix spelling mistake
soundwire: fix trailing line in sysfs_slave.c
soundwire: add Slave sysfs support
soundwire: master: add sysfs support
soundwire: disco: s/ch/channels/
soundwire: master: add runtime pm support
soundwire: bus_type: add sdw_master_device support
soundwire: bus: add unique bus id
soundwire: bus_type: introduce sdw_slave_type and sdw_master_type
soundwire: bus: rename sdw_bus_master_add/delete, add arguments
soundwire: intel: (cosmetic) remove multiple superfluous "else" statements
soundwire: (cosmetic) remove multiple superfluous "else" statements
soundwire: qcom: Use IRQF_ONESHOT
soundwire: bus: reduce verbosity on enumeration
soundwire: debugfs: clarify SDPX license with GPL-2.0-only
soundwire: slave: don't init debugfs on device registration error
Documentation: SoundWire: clarify TDM mode support
soundwire: qcom: fix error handling in probe
soundwire: intel: use asoc_rtd_to_cpu() / asoc_rtd_to_codec() macro for DAI pointer
These are the interconnect changes for the 5.8-rc1 merge window:
Core changes:
- Convert the framework core from tristate to bool to make handling
dependencies between other core frameworks easier
- Add of_icc_get_by_index()
- Add devm_of_icc_get() helper function
- Add icc_enable() and icc_disable() helpers
New drivers:
- Platform driver for NXP i.MX8MM SoC
- Platform driver for NXP i.MX8MN SoC
- Platform driver for NXP i.MX8MQ SoC
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
-----BEGIN PGP SIGNATURE-----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=+f9u
-----END PGP SIGNATURE-----
Merge tag 'icc-5.8-rc1' of https://git.linaro.org/people/georgi.djakov/linux into char-misc-next
Georgi writes:
interconnect changes for 5.8
These are the interconnect changes for the 5.8-rc1 merge window:
Core changes:
- Convert the framework core from tristate to bool to make handling
dependencies between other core frameworks easier
- Add of_icc_get_by_index()
- Add devm_of_icc_get() helper function
- Add icc_enable() and icc_disable() helpers
New drivers:
- Platform driver for NXP i.MX8MM SoC
- Platform driver for NXP i.MX8MN SoC
- Platform driver for NXP i.MX8MQ SoC
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
* tag 'icc-5.8-rc1' of https://git.linaro.org/people/georgi.djakov/linux:
interconnect: Remove unused module exit code from core
interconnect: Disallow interconnect core to be built as a module
interconnect: Add of_icc_get_by_index() helper function
interconnect: Add helpers for enabling/disabling a path
interconnect: imx: Fix return value check in imx_icc_node_init_qos()
interconnect: imx: Add platform driver for imx8mn
interconnect: imx: Add platform driver for imx8mq
interconnect: imx: Add platform driver for imx8mm
interconnect: Add imx core driver
dt-bindings: interconnect: Add bindings for imx8m noc
interconnect: Add devm_of_icc_get() as exported API for users
The variable ret is being initialized with a value that is never read
and it is being updated later with a new value. The initialization
is redundant and can be removed.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200519154553.873413-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The problem is that we change "p_args" to point to the middle of the
string so when we free it at the end of the function it's not freeing
the same pointer that we originally allocated.
Fixes: e2c94d6f57 ("w1_therm: adding alarm sysfs entry")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200520120019.GA172354@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It's not clear why we have two modules for the Intel controller/master
support when there is a single Kconfig. This adds complexity for no
good reason, the two parts need to work together anyways.
Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200519191903.6557-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Expose MIPI DisCo Slave properties in sysfs.
For Slave properties and Data Port 0, the attributes are managed with
simple devm_ support.
A Slave Device may have more than one Data Port (DPN), and each Data
Port can be sink or source. The attributes are created dynamically
using pre-canned macros, but still use devm_ with a name attribute
group to avoid creating kobjects - as requested by GregKH. In the
_show function, we use container_of() to retrieve port number and
direction required to extract the information.
Audio modes are not supported for now. Depending on the discussions
the SoundWire Device Class, we may add it later as is or follow the
new specification.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200518203551.2053-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add the master properties as attributes. The description is directly
derived from the MIPI DisCo specification.
Credits: this patch is based on an earlier internal contribution by
Vinod Koul, Sanyog Kale, Shreyas Nc and Hardik Shah.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200518203551.2053-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Use more meaningful member names in preparation for sysfs support.
No functionality change.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200518203551.2053-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add Renesas R8A774C0 in pci_device_id table so that pci-epf-test can be
used for testing PCIe EP on RZ/G2E.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/1589493809-2602-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This code was using get_user_pages*(), in a "Case 2" scenario
(DMA/RDMA), using the categorization from [1]. That means that it's
time to convert the get_user_pages*() + put_page() calls to
pin_user_pages*() + unpin_user_pages() calls.
There is some helpful background in [2]: basically, this is a small
part of fixing a long-standing disconnect between pinning pages, and
file systems' use of those pages.
[1] Documentation/core-api/pin_user_pages.rst
[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/
Cc: Frank Haverkamp <haver@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/20200518015237.1568940-1-jhubbard@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This code was using get_user_pages*(), in a "Case 2" scenario
(DMA/RDMA), using the categorization from [1]. That means that it's
time to convert the get_user_pages*() + put_page() calls to
pin_user_pages*() + unpin_user_pages() calls.
There is some helpful background in [2]: basically, this is a small
part of fixing a long-standing disconnect between pinning pages, and
file systems' use of those pages.
Note that this effectively changes the code's behavior as well: it now
ultimately calls set_page_dirty_lock(), instead of SetPageDirty(). This
is probably more accurate.
As Christoph Hellwig put it, "set_page_dirty() is only safe if we are
dealing with a file backed page where we have reference on the inode it
hangs off." [3]
[1] Documentation/core-api/pin_user_pages.rst
[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/
[3] https://lore.kernel.org/r/20190723153640.GB720@lst.de
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/20200518041307.1987328-1-jhubbard@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Adds a notify callback for CPU PM events to the CTI driver - for
CPU bound CTI devices.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-24-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Adds registration of CPU start and stop functions to CPU hotplug
mechanisms - for any CPU bound CTI.
Sets CTI powered flag according to state.
Will enable CTI on CPU start if there are existing enable requests.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-23-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We don't need to cast void pointers, such as the amba_id data. Assign to
a local variable to make the code prettier and also return NULL instead
of 0 to make sparse happy.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Joe Perches <joe@perches.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-21-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We should include headers that C files use in the C files that use them
and avoid relying on implicit includes as much as possible. This helps
avoid compiler errors in the future about missing declarations when
header files change includes in the future.
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-20-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sparse gets annoyed when this initializer is 0 but the first struct
member is a pointer. Just use { } to initialize instead so that sparse
is quiet.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-19-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These variables are assigned again before they're used. Leave them
unassigned at first so that the compiler can detect problems in the
future with use before initialization.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-18-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These functions aren't used outside the file they're in. Mark them
static to indicate as such and silence tools like sparse.
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
[Dropped changes in coresight-cti.c and coresight-etb10.c]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-17-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add PID for Arm Neoverse N1 ETM to the list of supported/known ETMs.
Signed-off-by: Anurag Koul <anurag.koul@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-16-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Differing default states set on driver init / perf init and as a result
of a sysfs reset.
The ETMv4 can be programmed to trace the entire instruction address range
without the need to use address comparator filter resources.
(Described in the ETMv4.x technical reference manual)
sysfs reset was using this method, perf and default driver init were setup
with an address range comparator for the entire address range.
The perf / driver init has been altered to use the method without needing
any comparator address hardware.
Minor adjustment to the vinst_ctrl register initialisation to ensure
correct zero initialisation.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-15-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On some QCOM platforms like SC7180, SDM845 and SM8150,
reading TMC mode register without proper coresight power
management can lead to async exceptions like the one in
the call trace below in tmc_read_prepare_etb(). This can
happen if the user tries to read the TMC etf data via
device node without setting up source and the sink first.
Fix this by having a check for coresight sysfs mode
before reading TMC mode management register.
Kernel panic - not syncing: Asynchronous SError Interrupt
CPU: 7 PID: 2605 Comm: hexdump Tainted: G S 5.4.30 #122
Call trace:
dump_backtrace+0x0/0x188
show_stack+0x20/0x2c
dump_stack+0xdc/0x144
panic+0x168/0x36c
panic+0x0/0x36c
arm64_serror_panic+0x78/0x84
do_serror+0x130/0x138
el1_error+0x84/0xf8
tmc_read_prepare_etb+0x88/0xb8
tmc_open+0x40/0xd8
misc_open+0x120/0x158
chrdev_open+0xb8/0x1a4
do_dentry_open+0x268/0x3a0
vfs_open+0x34/0x40
path_openat+0x39c/0xdf4
do_filp_open+0x90/0x10c
do_sys_open+0x150/0x3e8
__arm64_compat_sys_openat+0x28/0x34
el0_svc_common+0xa8/0x160
el0_svc_compat_handler+0x2c/0x38
el0_svc_compat+0x8/0x10
Fixes: 4525412a50 ("coresight: tmc: making prepare/unprepare functions generic")
Reported-by: Stephen Boyd <swboyd@chromium.org>
Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-14-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
On some systems the firmware may not describe all the ports
connected to a component (e.g, for security reasons). This
could be especially problematic for "funnels" where we could
end up in modifying memory beyond the allocated space for
refcounts.
e.g, for a funnel with input ports listed 0, 3, 5, nr_inport = 3.
However the we could access refcnts[5] while checking for
references, like :
[ 526.110401] ==================================================================
[ 526.117988] BUG: KASAN: slab-out-of-bounds in funnel_enable+0x54/0x1b0
[ 526.124706] Read of size 4 at addr ffffff8135f9549c by task bash/1114
[ 526.131324]
[ 526.132886] CPU: 3 PID: 1114 Comm: bash Tainted: G S 5.4.25 #232
[ 526.140397] Hardware name: Qualcomm Technologies, Inc. SC7180 IDP (DT)
[ 526.147113] Call trace:
[ 526.149653] dump_backtrace+0x0/0x188
[ 526.153431] show_stack+0x20/0x2c
[ 526.156852] dump_stack+0xdc/0x144
[ 526.160370] print_address_description+0x3c/0x494
[ 526.165211] __kasan_report+0x144/0x168
[ 526.169170] kasan_report+0x10/0x18
[ 526.172769] check_memory_region+0x1a4/0x1b4
[ 526.177164] __kasan_check_read+0x18/0x24
[ 526.181292] funnel_enable+0x54/0x1b0
[ 526.185072] coresight_enable_path+0x104/0x198
[ 526.189649] coresight_enable+0x118/0x26c
...
[ 526.237782] Allocated by task 280:
[ 526.241298] __kasan_kmalloc+0xf0/0x1ac
[ 526.245249] kasan_kmalloc+0xc/0x14
[ 526.248849] __kmalloc+0x28c/0x3b4
[ 526.252361] coresight_register+0x88/0x250
[ 526.256587] funnel_probe+0x15c/0x228
[ 526.260365] dynamic_funnel_probe+0x20/0x2c
[ 526.264679] amba_probe+0xbc/0x158
[ 526.268193] really_probe+0x144/0x408
[ 526.271970] driver_probe_device+0x70/0x140
...
[ 526.316810]
[ 526.318364] Freed by task 0:
[ 526.321344] (stack is not available)
[ 526.325024]
[ 526.326580] The buggy address belongs to the object at ffffff8135f95480
[ 526.326580] which belongs to the cache kmalloc-128 of size 128
[ 526.339439] The buggy address is located 28 bytes inside of
[ 526.339439] 128-byte region [ffffff8135f95480, ffffff8135f95500)
[ 526.351399] The buggy address belongs to the page:
[ 526.356342] page:ffffffff04b7e500 refcount:1 mapcount:0 mapping:ffffff814b00c380 index:0x0 compound_mapcount: 0
[ 526.366711] flags: 0x4000000000010200(slab|head)
[ 526.371475] raw: 4000000000010200 ffffffff05034008 ffffffff0501eb08 ffffff814b00c380
[ 526.379435] raw: 0000000000000000 0000000000190019 00000001ffffffff 0000000000000000
[ 526.387393] page dumped because: kasan: bad access detected
[ 526.393128]
[ 526.394681] Memory state around the buggy address:
[ 526.399619] ffffff8135f95380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 526.407046] ffffff8135f95400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 526.414473] >ffffff8135f95480: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 526.421900] ^
[ 526.426029] ffffff8135f95500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 526.433456] ffffff8135f95580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 526.440883] ==================================================================
To keep the code simple, we now track the maximum number of
possible input/output connections to/from this component
@ nr_inport and nr_outport in platform_data, respectively.
Thus the output connections could be sparse and code is
adjusted to skip the unspecified connections.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Reported-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-13-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix the following sparse warning:
drivers/hwtracing/coresight/coresight-etb10.c:720:30: warning: symbol
'coresight_etb_groups' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-12-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix the following sparse warning:
drivers/hwtracing/coresight/coresight-cti.c:22:1: warning: symbol
'ect_net' was not declared. Should it be static?
drivers/hwtracing/coresight/coresight-cti.c:625:32: warning: symbol
'cti_ops_ect' was not declared. Should it be static?
drivers/hwtracing/coresight/coresight-cti.c:630:28: warning: symbol
'cti_ops' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-11-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Replace the AMBA ETM PIDs with UCI IDs to avoid future
conflicts when adding the CTI support for QCOM Kryo385
CPU cores.
Fixes: 17b4add0d4 ("coresight: etm4x: Add ETM PIDs for SDM845 and MSM8996")
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-10-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add ETM UCI IDs for Qualcomm SC7180 SoC. It has 2
big CPU cores based on Cortex-A76 and 6 LITTLE CPU
cores based on Cortex-A55.
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Update the CoreSight documents to describe the new connections directory
and the links between CoreSight devices in this directory.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200518180242.7916-7-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjorn Helgaas