kernel/linux.git/drivers/memory/tegra, branch v6.6.132

memory: tegra20-emc: fix an OF node reference bug in tegra_emc_find_node_by_ram_code()

2025-02-08T08:52:14+00:00

[ Upstream commit b9784e5cde1f9fb83661a70e580e381ae1264d12 ] As of_find_node_by_name() release the reference of the argument device node, tegra_emc_find_node_by_ram_code() releases some device nodes while still in use, resulting in possible UAFs. According to the bindings and the in-tree DTS files, the "emc-tables" node is always device's child node with the property "nvidia,use-ram-code", and the "lpddr2" node is a child of the "emc-tables" node. Thus utilize the for_each_child_of_node() macro and of_get_child_by_name() instead of of_find_node_by_name() to simplify the code. This bug was found by an experimental verification tool that I am developing. Fixes: 96e5da7c8424 ("memory: tegra: Introduce Tegra20 EMC driver") Signed-off-by: Joe Hattori Link: https://lore.kernel.org/r/20241217091434.1993597-1-joe@pf.is.s.u-tokyo.ac.jp Link: https://lore.kernel.org/r/20241218024415.2494267-3-joe@pf.is.s.u-tokyo.ac.jp [krzysztof: applied v1, adjust the commit msg to incorporate v2 parts] Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin

memory: tegra186-emc: drop unused to_tegra186_emc()

2024-10-10T09:57:44+00:00

commit 67dd9e861add38755a7c5d29e25dd0f6cb4116ab upstream. to_tegra186_emc() is not used, W=1 builds: tegra186-emc.c:38:36: error: unused function 'to_tegra186_emc' [-Werror,-Wunused-function] Fixes: 9a38cb27668e ("memory: tegra: Add interconnect support for DRAM scaling in Tegra234") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240812123055.124123-1-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski Signed-off-by: Greg Kroah-Hartman

memory: tegra: Skip SID programming if SID registers aren't set

2024-08-29T15:33:30+00:00

[ Upstream commit 0d6c918011ce4764ed277de4726a468b7ffe5fed ] There are few MC clients where SID security and override register offsets are not specified like "sw_cluster0" in tegra234. Don't program SID override for such clients because it leads to access to invalid addresses. Signed-off-by: Ashish Mhetre Link: https://lore.kernel.org/r/20231107112713.21399-2-amhetre@nvidia.com Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin

memory: tegra: Correct DLA client names

2024-03-26T22:19:32+00:00

[ Upstream commit 51d915cbeef4c7a154f5d810b1e10d8125f2b0cc ] Some of the names for the Tegra234 DLA clients are not unique and do not align with the name of the client ID definitions. Therefore, it is not possible to determine the exact DLA client from messages that print the client name. Fix this by correcting the DLA memory client names for Tegra234 to align with the name of the corresponding memory client ID. Note that although the client names are also used by the interconnect framework, interconnect support for the DLA clients has not been added and so this issue does not impact the interconnect support. Fixes: 5cd24ca0985f ("memory: tegra: Add DLA clients for Tegra234") Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20240220124430.19072-1-jonathanh@nvidia.com Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin

memory: tegra: Set BPMP msg flags to reset IPC channels

2023-11-20T10:59:17+00:00

[ Upstream commit f344675a34383ae26a8230f4b1cd99cbd0defebd ] Set the 'TEGRA_BPMP_MESSAGE_RESET' bit in newly added 'flags' field of 'struct tegra_bpmp_message' to request for the reset of BPMP IPC channels. This is used along with the 'suspended' check in BPMP driver for handling early bandwidth requests due to the hotplug of CPU's during system resume before the driver gets resumed. Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth") Co-developed-by: Sumit Gupta Signed-off-by: Sumit Gupta Acked-by: Krzysztof Kozlowski Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

memory: tegra: add MC client for Tegra234 GPU

2023-08-05T07:01:31+00:00

Add the Non-ISO MC client for the Tegra234 GPU to the tegra234_mc_clients table. Signed-off-by: Sumit Gupta Link: https://lore.kernel.org/r/20230801121023.27841-1-sumitg@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: Explicitly include correct DT includes

2023-07-25T20:09:37+00:00

The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20230714174717.4059518-1-robh@kernel.org Signed-off-by: Krzysztof Kozlowski

memory: tegra: Prefer octal over symbolic permissions

2023-07-25T20:09:36+00:00

checkpatch recommends using octal permissions instead of symbolic permissions. Switch the debugfs files to use the former to silence these warnings. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20230714150116.2823766-1-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: add check if MRQ_EMC_DVFS_LATENCY is supported

2023-07-25T20:09:36+00:00

Add check to ensure that "MRQ_EMC_DVFS_LATENCY" is supported by the BPMP-FW before making the MRQ request. Currently, if the BPMP-FW doesn't support this MRQ, then the "tegra186_emc_probe" fails. Due to this the Memory Interconnect initialization also doesn't happen. Memory Interconnect is not dependent on this MRQ and can initialize even when this MRQ is not supported in any platform. The check ensures that the MRQ is called only when it is supported by the BPMP-FW and Interconnect initializes independent of this MRQ. Also, moved the code to new function for better readability. Signed-off-by: Sumit Gupta Acked-by: Thierry Reding Link: https://lore.kernel.org/r/20230621134400.23070-4-sumitg@nvidia.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Add clients used by DRM in Tegra234

2023-07-25T20:09:36+00:00

Add entries for VIC, NVDEC, NVENC, NVJPG memory controller clients into the 'tegra_234_mc_clients' table. Signed-off-by: Johnny Liu Signed-off-by: Sumit Gupta Acked-by: Thierry Reding Link: https://lore.kernel.org/r/20230621134400.23070-3-sumitg@nvidia.com Signed-off-by: Krzysztof Kozlowski