Created unbind_driver and bind_to_driver.

src/pci_passthrough_assist/__main__.py

@@ -1,5 +1,10 @@
 from sys import platform
+from pci_passthrough_assist.permissions import is_ran_by_root
 
 if platform != "linux":
     print("This tool will only work on Linux based OS.")
+    exit(1)
+
+if not is_ran_by_root():
+    print("This script needs to run as root.")
     exit(1)

src/pci_passthrough_assist/pci.py

@@ -0,0 +1,16 @@
+from os import listdir
+from os.path import realpath, basename
+
+
+def all_pci_device_ids() -> list[str]:
+    return listdir("/sys/bus/pci/devices")
+
+
+def all_pci_driver_ids() -> list[str]:
+    return listdir("/sys/bus/pci/drivers")
+
+
+def driver_of_pci_device(pci_device_id: str) -> str:
+    driver_directory: str = realpath(
+        f"/sys/bus/pci/devices/{pci_device_id}/driver")
+    return basename(driver_directory)

src/pci_passthrough_assist/pci_device.py

@@ -0,0 +1,36 @@
+from pci_passthrough_assist.pci import driver_of_pci_device
+from os.path import exists
+from os import listdir
+
+
+class PciDevice:
+
+    def __init__(self, device_id: str):
+        self.device_id = device_id
+
+    def driver_name(self) -> str:
+        return driver_of_pci_device(self.device_id)
+
+    def is_vga(self) -> bool:
+        return exists(f"/sys/bus/pci/devices/{self.device_id}/boot_vga")
+
+    def unbind_driver(self):
+        with open(f"/sys/bus/pci/devices/{self.device_id}/driver/unbind",
+                  "w") as device_driver:
+            device_driver.write(self.device_id)
+
+    def bind_to_driver(self, driver_to_bind: str, unbind_first: bool = True):
+        if unbind_first:
+            self.unbind_driver()
+
+        with open(f"/sys/bus/pci/drivers/{driver_to_bind}/bind",
+                  "w") as driver:
+            driver.write(self.device_id)
+
+    def devices_in_iommu_group(self) -> list['PciDevice']:
+        device_ids: list[str] = listdir(
+            f"/sys/bus/pci/devices/{self.device_id}/iommu_group/devices")
+        return [PciDevice(device_id) for device_id in device_ids]
+
+    def __str__(self) -> str:
+        return f"{self.device_id} driver: {self.driver_name()} VGA: {self.is_vga()}"

src/pci_passthrough_assist/permissions.py

@@ -0,0 +1,5 @@
+from pci_passthrough_assist.process_runner import sh
+
+
+def is_ran_by_root() -> bool:
+    return sh(["whoami"]) == "root"

src/pci_passthrough_assist/process_runner.py

@@ -0,0 +1,14 @@
+from subprocess import run
+
+
+def sh_binary(args: list[str], ) -> bytes:
+    return run(args, capture_output=True).stdout
+
+
+def sh(args: list[str], rstrip_newline=True):
+    string_output: str = sh_binary(args).decode()
+    return string_output if not rstrip_newline else string_output.rstrip("\n")
+
+
+def sh_lines(args: list[str]) -> list[str]:
+    return sh(args, rstrip_newline=True).splitlines()