Fix WARNING: AMD GPUs visible, but data is inaccessible (#58)

* [SWDEV-531834] Fix AMD GPUs visible, but data is inaccessible:
- Scans directories under /sys/bus/pci/drivers/amdgpu
- Verifies each device's runtime_status to determine if it's active
- Returns False if any device is not in active state
- Handles permission errors gracefully with proper debug logging
- Includes comments explaining behavior differences between Instinct / NAVI hardware

The default status is set to True, assuming devices are active unless
proven otherwise, which accommodates hardware like some Instinct ASICS
which do not support runtime power management.

Signed-off-by: Juan Castillo <juan.castillo@amd.com>

[ROCm/rocm_smi_lib commit: 47f80145cb]

projects/rocm-smi-lib/python_smi_tools/rocm_smi.py

@@ -3920,23 +3920,40 @@ def checkAmdGpus(deviceList):
     return False
 
 
-def check_runtime_status()->bool:
-    """Check the runtime status of all paths along /sys/bus/pci/drivers/amdgpu/*/power/runtime_status.
+def check_runtime_status() -> bool:
+    """Check the runtime status of all AMD GPU devices managed by the amdgpu driver.
 
-    Returns:
-        bool: True if any status is "active", False if any status is "unsupported".
+    This function scans the directories under the specified path to verify the
+    runtime power management status of each device. It checks the "runtime_status"
+    file for each device to determine if the device is in an "active" state. If any
+    device is not in an "active" state it returns False. If the file is inaccessible,
+    this may be due to a system that does not support runtime power management.
+    Some GPUs support runtime power management, while others may not. This is why the default status
+    is set to True.
+
+    bool: False if any device is not in "active" state, True otherwise.
     """
     base_path = "/sys/bus/pci/drivers/amdgpu"
+    status = True  # Default to True, assuming active unless proven otherwise
     for device in os.listdir(base_path):
         if os.path.isdir(os.path.join(base_path, device)):
             runtime_status_path = os.path.join(base_path, device, "power", "runtime_status")
-            if os.path.exists(runtime_status_path):
-                with open(runtime_status_path, 'r') as file:
-                    status = file.read().strip()
-                    if status == "active":
-                        return True
-    return False
-
+            try:
+                if os.path.exists(runtime_status_path):
+                    with open(runtime_status_path, 'r') as file:
+                        current_status = file.read().strip()
+                        if current_status != "active":
+                            status = False
+                            continue
+                        else:
+                            logging.debug(f"Runtime status for {device}: {current_status}")
+            except PermissionError as e:
+                # Handle permission errors gracefully
+                logging.debug(f"Permission denied while accessing {runtime_status_path} \nError: {e}")
+                continue
+        else:
+            logging.debug(f"Path {os.path.join(base_path, device)} is not a directory.")
+    return status
 
 def component_str(component):
     """ Returns the component String value