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accel/habanalabs: expose module id through sysfs

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Module ID exposes the physical location of the device in the server,
from the pov of the devices in regard to how they are connected by
internal fabric.

This information is already exposed in our INFO ioctl, but there are
utilities and scripts running in data-center which are already
accessing sysfs for topology information and it is easier for them
to continue getting that information from sysfs instead of opening
a file descriptor.

Signed-off-by: Dani Liberman <dliberman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Dani Liberman 2023-11-13 21:11:13 +02:00 committed by Oded Gabbay
parent c9f9d0e3d0
commit 47a552863d
2 changed files with 16 additions and 0 deletions
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6
Documentation/ABI/testing/sysfs-driver-habanalabs
View File

@ -149,6 +149,12 @@ Contact: ogabbay@kernel.org
Description: Displays the current clock frequency, in Hz, of the MME compute
engine. This property is valid only for the Goya ASIC family
What: /sys/class/accel/accel<n>/device/module_id
Date: Nov 2023
KernelVersion: not yet upstreamed
Contact: ogabbay@kernel.org
Description: Displays the device's module id
What: /sys/class/accel/accel<n>/device/pci_addr
Date: Jan 2019
KernelVersion: 5.1

10
drivers/accel/habanalabs/common/sysfs.c
View File

@ -386,6 +386,14 @@ static ssize_t security_enabled_show(struct device *dev,
return sprintf(buf, "%d\n", hdev->asic_prop.fw_security_enabled);
}
static ssize_t module_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hl_device *hdev = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", le32_to_cpu(hdev->asic_prop.cpucp_info.card_location));
}
static DEVICE_ATTR_RO(armcp_kernel_ver);
static DEVICE_ATTR_RO(armcp_ver);
static DEVICE_ATTR_RO(cpld_ver);
@ -405,6 +413,7 @@ static DEVICE_ATTR_RO(thermal_ver);
static DEVICE_ATTR_RO(uboot_ver);
static DEVICE_ATTR_RO(fw_os_ver);
static DEVICE_ATTR_RO(security_enabled);
static DEVICE_ATTR_RO(module_id);
static struct bin_attribute bin_attr_eeprom = {
.attr = {.name = "eeprom", .mode = (0444)},
@ -430,6 +439,7 @@ static struct attribute *hl_dev_attrs[] = {
&dev_attr_uboot_ver.attr,
&dev_attr_fw_os_ver.attr,
&dev_attr_security_enabled.attr,
&dev_attr_module_id.attr,
NULL,
};