linux-toradex.git/drivers/edac/qcom_edac.c, branch v6.4

EDAC/qcom: Get rid of hardcoded register offsets

2023-05-27T03:56:55+00:00

The LLCC EDAC register offsets varies between each SoC. Hardcoding the
register offsets won't work and will often result in crash due to
accessing the wrong locations.

Hence, get the register offsets from the LLCC driver matching the
individual SoCs.

Cc:  # 6.0: 5365cea199c7 ("soc: qcom: llcc: Rename reg_offset structs to reflect LLCC version")
Cc:  # 6.0: c13d7d261e36 ("soc: qcom: llcc: Pass LLCC version based register offsets to EDAC driver")
Cc:  # 6.0
Fixes: a6e9d7ef252c ("soc: qcom: llcc: Add configuration data for SM8450 SoC")
Acked-by: Borislav Petkov (AMD) 
Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20230517114635.76358-3-manivannan.sadhasivam@linaro.org

EDAC/qcom: Remove superfluous return variable assignment in qcom_llcc_core_setup()

2023-05-27T03:56:54+00:00

"ret" variable will be assigned on both success and failure cases. So there
is no need to initialize it during start of qcom_llcc_core_setup().

Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20230517114635.76358-2-manivannan.sadhasivam@linaro.org

qcom: llcc/edac: Support polling mode for ECC handling

2023-03-15T22:17:08+00:00

Not all Qcom platforms support IRQ mode for ECC handling. For those
platforms, the current EDAC driver will not be probed due to missing ECC
IRQ in devicetree.

So add support for polling mode so that the EDAC driver can be used on all
Qcom platforms supporting LLCC.

The polling delay of 5000ms is chosen based on Qcom downstream/vendor
driver.

Reported-by: Luca Weiss 
Tested-by: Luca Weiss 
Tested-by: Steev Klimaszewski  # Thinkpad X13s
Tested-by: Andrew Halaney  # sa8540p-ride
Reviewed-by: Borislav Petkov (AMD) 
Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20230314080443.64635-14-manivannan.sadhasivam@linaro.org

qcom: llcc/edac: Fix the base address used for accessing LLCC banks

2023-03-15T22:17:08+00:00

The Qualcomm LLCC/EDAC drivers were using a fixed register stride for
accessing the (Control and Status Registers) CSRs of each LLCC bank.
This stride only works for some SoCs like SDM845 for which driver
support was initially added.

But the later SoCs use different register stride that vary between the
banks with holes in-between. So it is not possible to use a single register
stride for accessing the CSRs of each bank. By doing so could result in a
crash.

For fixing this issue, let's obtain the base address of each LLCC bank from
devicetree and get rid of the fixed stride. This also means, there is no
need to rely on reg-names property and the base addresses can be obtained
using the index.

First index is LLCC bank 0 and last index is LLCC broadcast. If the SoC
supports more than one bank, then those need to be defined in devicetree
for index from 1..N-1.

Reported-by: Parikshit Pareek 
Tested-by: Luca Weiss 
Tested-by: Steev Klimaszewski  # Thinkpad X13s
Tested-by: Andrew Halaney  # sa8540p-ride
Reviewed-by: Borislav Petkov (AMD) 
Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Bjorn Andersson 
Link: https://lore.kernel.org/r/20230314080443.64635-13-manivannan.sadhasivam@linaro.org

Merge tag 'edac_updates_for_v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

2023-02-21T16:10:03+00:00

Pull EDAC updates from Borislav Petkov:

 - Add a driver for the RAS functionality on Xilinx's on chip memory
   controller

 - Add support for decoding errors from the first and second level
   memory on SKL-based hardware

 - Add support for the memory controllers in Intel Granite Rapids and
   Emerald Rapids machines

 - First round of amd64_edac driver simplification and removal of
   unneeded functionality

 - The usual cleanups and fixes

* tag 'edac_updates_for_v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/amd64: Shut up an -Werror,-Wsometimes-uninitialized clang false positive
  EDAC/amd64: Remove early_channel_count()
  EDAC/amd64: Remove PCI Function 0
  EDAC/amd64: Remove PCI Function 6
  EDAC/amd64: Remove scrub rate control for Family 17h and later
  EDAC/amd64: Don't set up EDAC PCI control on Family 17h+
  EDAC/i10nm: Add driver decoder for Sapphire Rapids server
  EDAC/i10nm: Add Intel Granite Rapids server support
  EDAC/i10nm: Make more configurations CPU model specific
  EDAC/i10nm: Add Intel Emerald Rapids server support
  EDAC/skx_common: Delete duplicated and unreachable code
  EDAC/skx_common: Enable EDAC support for the "near" memory
  EDAC/qcom: Add platform_device_id table for module autoloading
  EDAC/zynqmp: Add EDAC support for Xilinx ZynqMP OCM
  dt-bindings: edac: Add bindings for Xilinx ZynqMP OCM

EDAC/qcom: Do not pass llcc_driv_data as edac_device_ctl_info's pvt_info

2023-01-20T18:47:34+00:00

The memory for llcc_driv_data is allocated by the LLCC driver. But when
it is passed as the private driver info to the EDAC core, it will get freed
during the qcom_edac driver release. So when the qcom_edac driver gets probed
again, it will try to use the freed data leading to the use-after-free bug.

Hence, do not pass llcc_driv_data as pvt_info but rather reference it
using the platform_data pointer in the qcom_edac driver.

Fixes: 27450653f1db ("drivers: edac: Add EDAC driver support for QCOM SoCs")
Reported-by: Steev Klimaszewski 
Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Borislav Petkov (AMD) 
Tested-by: Steev Klimaszewski  # Thinkpad X13s
Tested-by: Andrew Halaney  # sa8540p-ride
Cc:  # 4.20
Link: https://lore.kernel.org/r/20230118150904.26913-4-manivannan.sadhasivam@linaro.org

EDAC/qcom: Add platform_device_id table for module autoloading

2023-01-20T15:59:53+00:00

Add a device ID table so that the driver loads automatically when the
associated platform_device gets registered.

Reported-by: Andrew Halaney 
Signed-off-by: Manivannan Sadhasivam 
Signed-off-by: Borislav Petkov (AMD) 
Tested-by: Steev Klimaszewski  # Thinkpad X13s
Tested-by: Andrew Halaney  # sa8540p-ride
Link: https://lore.kernel.org/r/20230118150904.26913-3-manivannan.sadhasivam@linaro.org

EDAC, qcom_edac: Remove irq_handled local variable

2018-11-06T11:03:16+00:00

irq_handled isn't initialized to false on function entry. However, it is
not really needed and the IRQ handler return value can be set directly
instead.

 [ bp: rewrite commit message. ]

Fixes: 27450653f1db ("drivers: edac: Add EDAC driver support for QCOM SoCs")
Signed-off-by: Dan Carpenter 
Signed-off-by: Borislav Petkov 
CC: Channagoud Kadabi 
CC: Mauro Carvalho Chehab 
CC: Venkata Narendra Kumar Gutta 
CC: kernel-janitors@vger.kernel.org
CC: linux-arm-msm@vger.kernel.org
CC: linux-edac 
Link: http://lkml.kernel.org/r/20181018141522.rywdvjmlpk4ticiw@kili.mountain

drivers: edac: Add EDAC driver support for QCOM SoCs

2018-09-13T20:54:05+00:00

Add error reporting driver for Single Bit Errors (SBEs) and Double Bit
Errors (DBEs). As of now, this driver supports error reporting for
Last Level Cache Controller (LLCC) of Tag RAM and Data RAM. Interrupts
are triggered when the errors happen in the cache, the driver handles
those interrupts and dumps the syndrome registers.

Signed-off-by: Channagoud Kadabi 
Signed-off-by: Venkata Narendra Kumar Gutta 
Co-developed-by: Venkata Narendra Kumar Gutta 
Acked-by: Borislav Petkov 
Signed-off-by: Andy Gross