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| author | Oded Gabbay <oded.gabbay@gmail.com> | 2020-05-09 12:17:21 +0300 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2020-05-19 14:48:41 +0300 |
| commit | ca62433f53d1ff48a4f77ef96332122558f90ad3 (patch) | |
| tree | b1978bc1f2ac06f569725d52fc6aba526f56b891 /Documentation | |
| parent | 803917f960c2a34d16fb0aa6debb80fed59a58b7 (diff) | |
| download | linux-stable-ca62433f53d1ff48a4f77ef96332122558f90ad3.tar.gz linux-stable-ca62433f53d1ff48a4f77ef96332122558f90ad3.tar.bz2 linux-stable-ca62433f53d1ff48a4f77ef96332122558f90ad3.zip | |
habanalabs: support clock gating enable/disable
In Gaudi there is a feature of clock gating certain engines.
Therefore, add this property to the device structure.
In addition, due to a limitation of this feature, the driver needs to
dynamically enable or disable this feature during run-time. Therefore, add
ASIC interface functions to enable/disable this function from the common
code.
Moreover, this feature must be turned off when the user wishes to debug the
ASIC by reading/writing registers and/or memory through the driver's
debugfs. Therefore, add an option to enable/disable clock gating via the
debugfs interface.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/debugfs-driver-habanalabs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/debugfs-driver-habanalabs b/Documentation/ABI/testing/debugfs-driver-habanalabs index 67e04f2d7e1d..f6d9c2a8d528 100644 --- a/Documentation/ABI/testing/debugfs-driver-habanalabs +++ b/Documentation/ABI/testing/debugfs-driver-habanalabs @@ -8,6 +8,16 @@ Description: Sets the device address to be used for read or write through only when the IOMMU is disabled. The acceptable value is a string that starts with "0x" +What: /sys/kernel/debug/habanalabs/hl<n>/clk_gate +Date: May 2020 +KernelVersion: 5.8 +Contact: oded.gabbay@gmail.com +Description: Allow the root user to disable/enable in runtime the clock + gating mechanism in Gaudi. Due to how Gaudi is built, the + clock gating needs to be disabled in order to access the + registers of the TPC and MME engines. This is sometimes needed + during debug by the user and hence the user needs this option + What: /sys/kernel/debug/habanalabs/hl<n>/command_buffers Date: Jan 2019 KernelVersion: 5.1 |