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What: /sys/kernel/debug/habanalabs/hl<n>/addr
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets the device address to be used for read or write through
PCI bar, or the device VA of a host mapped memory to be read or
written directly from the host. The latter option is allowed
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.
The user can supply a bitmask value, each bit represents
a different engine to disable/enable its clock gating feature.
The bitmask is composed of 20 bits:
======= ============
0 - 7 DMA channels
8 - 11 MME engines
12 - 19 TPC engines
======= ============
The bit's location of a specific engine can be determined
using (1 << GAUDI_ENGINE_ID_*). GAUDI_ENGINE_ID_* values
are defined in uapi habanalabs.h file in enum gaudi_engine_id
What: /sys/kernel/debug/habanalabs/hl<n>/command_buffers
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays a list with information about the currently allocated
command buffers
What: /sys/kernel/debug/habanalabs/hl<n>/command_submission
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays a list with information about the currently active
command submissions
What: /sys/kernel/debug/habanalabs/hl<n>/command_submission_jobs
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays a list with detailed information about each JOB (CB) of
each active command submission
What: /sys/kernel/debug/habanalabs/hl<n>/data32
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Allows the root user to read or write directly through the
device's PCI bar. Writing to this file generates a write
transaction while reading from the file generates a read
transaction. This custom interface is needed (instead of using
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory
What: /sys/kernel/debug/habanalabs/hl<n>/data64
Date: Jan 2020
KernelVersion: 5.6
Contact: oded.gabbay@gmail.com
Description: Allows the root user to read or write 64 bit data directly
through the device's PCI bar. Writing to this file generates a
write transaction while reading from the file generates a read
transaction. This custom interface is needed (instead of using
the generic Linux user-space PCI mapping) because the DDR bar
is very small compared to the DDR memory and only the driver can
move the bar before and after the transaction.
If the IOMMU is disabled, it also allows the root user to read
or write from the host a device VA of a host mapped memory
What: /sys/kernel/debug/habanalabs/hl<n>/device
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Enables the root user to set the device to specific state.
Valid values are "disable", "enable", "suspend", "resume".
User can read this property to see the valid values
What: /sys/kernel/debug/habanalabs/hl<n>/engines
Date: Jul 2019
KernelVersion: 5.3
Contact: oded.gabbay@gmail.com
Description: Displays the status registers values of the device engines and
their derived idle status
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_addr
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets I2C device address for I2C transaction that is generated
by the device's CPU
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_bus
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets I2C bus address for I2C transaction that is generated by
the device's CPU
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_data
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Triggers an I2C transaction that is generated by the device's
CPU. Writing to this file generates a write transaction while
reading from the file generates a read transcation
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_reg
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets I2C register id for I2C transaction that is generated by
the device's CPU
What: /sys/kernel/debug/habanalabs/hl<n>/led0
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets the state of the first S/W led on the device
What: /sys/kernel/debug/habanalabs/hl<n>/led1
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets the state of the second S/W led on the device
What: /sys/kernel/debug/habanalabs/hl<n>/led2
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets the state of the third S/W led on the device
What: /sys/kernel/debug/habanalabs/hl<n>/mmu
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays the hop values and physical address for a given ASID
and virtual address. The user should write the ASID and VA into
the file and then read the file to get the result.
e.g. to display info about VA 0x1000 for ASID 1 you need to do:
echo "1 0x1000" > /sys/kernel/debug/habanalabs/hl0/mmu
What: /sys/kernel/debug/habanalabs/hl<n>/set_power_state
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Sets the PCI power state. Valid values are "1" for D0 and "2"
for D3Hot
What: /sys/kernel/debug/habanalabs/hl<n>/userptr
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays a list with information about the currently user
pointers (user virtual addresses) that are pinned and mapped
to DMA addresses
What: /sys/kernel/debug/habanalabs/hl<n>/vm
Date: Jan 2019
KernelVersion: 5.1
Contact: oded.gabbay@gmail.com
Description: Displays a list with information about all the active virtual
address mappings per ASID
What: /sys/kernel/debug/habanalabs/hl<n>/stop_on_err
Date: Mar 2020
KernelVersion: 5.6
Contact: oded.gabbay@gmail.com
Description: Sets the stop-on_error option for the device engines. Value of
"0" is for disable, otherwise enable.
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