Le 05/01/2024 à 12:25, Ilpo Järvinen a écrit :
Add a thermal cooling driver to provide path to access PCIe bandwidth
controller using the usual thermal interfaces.
A cooling device is instantiated for controllable PCIe Ports from the
bwctrl service driver.
The thermal side state 0 means no throttling, i.e., maximum supported
PCIe Link Speed.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael@xxxxxxxxxx> # From the cooling device interface perspective
---
...
+struct thermal_cooling_device *pcie_cooling_device_register(struct pci_dev *port,
+ struct pcie_device *pdev)
+{
+ struct pcie_cooling_device *pcie_cdev;
+ struct thermal_cooling_device *cdev;
+ size_t name_len;
+ char *name;
+
+ pcie_cdev = kzalloc(sizeof(*pcie_cdev), GFP_KERNEL);
+ if (!pcie_cdev)
+ return ERR_PTR(-ENOMEM);
+
+ pcie_cdev->port = port;
+ pcie_cdev->pdev = pdev;
+
+ name_len = strlen(COOLING_DEV_TYPE_PREFIX) + strlen(pci_name(port)) + 1;
+ name = kzalloc(name_len, GFP_KERNEL);
+ if (!name) {
+ kfree(pcie_cdev);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ snprintf(name, name_len, COOLING_DEV_TYPE_PREFIX "%s", pci_name(port));
Nit: kasprintf() ?
+ cdev = thermal_cooling_device_register(name, pcie_cdev, &pcie_cooling_ops);
+ kfree(name);
+
+ return cdev;
+}
