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habanalabs: expose only valid debugfs nodes

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In case security is enabled on the device, some debugfs nodes will
fail. Hence, we do not expose them.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Ofir Bitton 2022-06-30 09:54:59 +03:00 committed by Oded Gabbay
parent 168fc71857
commit 08f0aa9548
2 changed files with 66 additions and 52 deletions
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24
Documentation/ABI/testing/debugfs-driver-habanalabs
View file

@ -130,14 +130,16 @@ Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets I2C device address for I2C transaction that is generated
by the device's CPU
by the device's CPU, Not available when device is loaded with secured
firmware
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_bus
Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets I2C bus address for I2C transaction that is generated by
the device's CPU
the device's CPU, Not available when device is loaded with secured
firmware
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_data
Date: Jan 2019
@ -145,39 +147,45 @@ KernelVersion: 5.1
Contact: ogabbay@kernel.org
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 transaction
reading from the file generates a read transaction, Not available
when device is loaded with secured firmware
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_len
Date: Dec 2021
KernelVersion: 5.17
Contact: obitton@habana.ai
Description: Sets I2C length in bytes for I2C transaction that is generated by
the device's CPU
the device's CPU, Not available when device is loaded with secured
firmware
What: /sys/kernel/debug/habanalabs/hl<n>/i2c_reg
Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets I2C register id for I2C transaction that is generated by
the device's CPU
the device's CPU, Not available when device is loaded with secured
firmware
What: /sys/kernel/debug/habanalabs/hl<n>/led0
Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets the state of the first S/W led on the device
Description: Sets the state of the first S/W led on the device, Not available
when device is loaded with secured firmware
What: /sys/kernel/debug/habanalabs/hl<n>/led1
Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets the state of the second S/W led on the device
Description: Sets the state of the second S/W led on the device, Not available
when device is loaded with secured firmware
What: /sys/kernel/debug/habanalabs/hl<n>/led2
Date: Jan 2019
KernelVersion: 5.1
Contact: ogabbay@kernel.org
Description: Sets the state of the third S/W led on the device
Description: Sets the state of the third S/W led on the device, Not available
when device is loaded with secured firmware
What: /sys/kernel/debug/habanalabs/hl<n>/memory_scrub
Date: May 2022

94
drivers/misc/habanalabs/common/debugfs.c
View file

@ -1562,6 +1562,53 @@ static const struct file_operations hl_debugfs_fops = {
.release = single_release,
};
static void add_secured_nodes(struct hl_dbg_device_entry *dev_entry)
{
debugfs_create_u8("i2c_bus",
0644,
dev_entry->root,
&dev_entry->i2c_bus);
debugfs_create_u8("i2c_addr",
0644,
dev_entry->root,
&dev_entry->i2c_addr);
debugfs_create_u8("i2c_reg",
0644,
dev_entry->root,
&dev_entry->i2c_reg);
debugfs_create_u8("i2c_len",
0644,
dev_entry->root,
&dev_entry->i2c_len);
debugfs_create_file("i2c_data",
0644,
dev_entry->root,
dev_entry,
&hl_i2c_data_fops);
debugfs_create_file("led0",
0200,
dev_entry->root,
dev_entry,
&hl_led0_fops);
debugfs_create_file("led1",
0200,
dev_entry->root,
dev_entry,
&hl_led1_fops);
debugfs_create_file("led2",
0200,
dev_entry->root,
dev_entry,
&hl_led2_fops);
}
void hl_debugfs_add_device(struct hl_device *hdev)
{
struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
@ -1632,50 +1679,6 @@ void hl_debugfs_add_device(struct hl_device *hdev)
dev_entry,
&hl_power_fops);
debugfs_create_u8("i2c_bus",
0644,
dev_entry->root,
&dev_entry->i2c_bus);
debugfs_create_u8("i2c_addr",
0644,
dev_entry->root,
&dev_entry->i2c_addr);
debugfs_create_u8("i2c_reg",
0644,
dev_entry->root,
&dev_entry->i2c_reg);
debugfs_create_u8("i2c_len",
0644,
dev_entry->root,
&dev_entry->i2c_len);
debugfs_create_file("i2c_data",
0644,
dev_entry->root,
dev_entry,
&hl_i2c_data_fops);
debugfs_create_file("led0",
0200,
dev_entry->root,
dev_entry,
&hl_led0_fops);
debugfs_create_file("led1",
0200,
dev_entry->root,
dev_entry,
&hl_led1_fops);
debugfs_create_file("led2",
0200,
dev_entry->root,
dev_entry,
&hl_led2_fops);
debugfs_create_file("device",
0200,
dev_entry->root,
@ -1754,6 +1757,9 @@ void hl_debugfs_add_device(struct hl_device *hdev)
entry->info_ent = &hl_debugfs_list[i];
entry->dev_entry = dev_entry;
}
if (!hdev->asic_prop.fw_security_enabled)
add_secured_nodes(dev_entry);
}
void hl_debugfs_remove_device(struct hl_device *hdev)