1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/pci-acpi.h>
30 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in acpi_enable_dpc()
38 	if (!acpi_check_dsm(adev->handle, &pci_acpi_dsm_guid, 6,  in acpi_enable_dpc()
43 	req.integer.value = 1;  in acpi_enable_dpc()
49 	obj = acpi_evaluate_dsm(adev->handle, &pci_acpi_dsm_guid, 6,  in acpi_enable_dpc()
54 	if (obj->type != ACPI_TYPE_INTEGER) {  in acpi_enable_dpc()
55 		pci_err(pdev, FW_BUG "Enable DPC _DSM returned non integer\n");  in acpi_enable_dpc()
56 		status = -EIO;  in acpi_enable_dpc()
59 	if (obj->integer.value != 1) {  in acpi_enable_dpc()
60 		pci_err(pdev, "Enable DPC _DSM failed to enable DPC\n");  in acpi_enable_dpc()
61 		status = -EIO;  in acpi_enable_dpc()
78 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in acpi_dpc_port_get()
87 	if (!acpi_check_dsm(adev->handle, &pci_acpi_dsm_guid, 5,  in acpi_dpc_port_get()
91 	obj = acpi_evaluate_dsm(adev->handle, &pci_acpi_dsm_guid, 5,  in acpi_dpc_port_get()
96 	if (obj->type != ACPI_TYPE_INTEGER) {  in acpi_dpc_port_get()
98 		pci_err(pdev, FW_BUG "Locate Port _DSM returned non integer\n");  in acpi_dpc_port_get()
106 	if (obj->integer.value & BIT(31)) {  in acpi_dpc_port_get()
108 		pci_err(pdev, "Locate Port _DSM failed\n");  in acpi_dpc_port_get()
118 	port = obj->integer.value;  in acpi_dpc_port_get()
122 	return pci_get_domain_bus_and_slot(pci_domain_nr(pdev->bus),  in acpi_dpc_port_get()
135 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in acpi_send_edr_status()
138 	pci_dbg(pdev, "Status for %s: %#x\n", pci_name(edev), status);  in acpi_send_edr_status()
140 	ost_status = PCI_DEVID(edev->bus->number, edev->devfn) << 16;  in acpi_send_edr_status()
143 	status = acpi_evaluate_ost(adev->handle, ACPI_NOTIFY_DISCONNECT_RECOVER,  in acpi_send_edr_status()
146 		return -EINVAL;  in acpi_send_edr_status()
165 	pci_info(pdev, "EDR event received\n");  in edr_handle_event()
174 		pci_err(pdev, "Firmware failed to locate DPC port\n");  in edr_handle_event()
178 	pci_dbg(pdev, "Reported EDR dev: %s\n", pci_name(edev));  in edr_handle_event()
181 	if (!edev->dpc_cap) {  in edr_handle_event()
182 		pci_err(edev, FW_BUG "This device doesn't support DPC\n");  in edr_handle_event()
187 	pci_read_config_word(edev, edev->dpc_cap + PCI_EXP_DPC_STATUS, &status);  in edr_handle_event()
189 		pci_err(edev, "Invalid DPC trigger %#010x\n", status);  in edr_handle_event()
210 		pci_dbg(edev, "DPC port successfully recovered\n");  in edr_handle_event()
214 		pci_dbg(edev, "DPC port recovery failed\n");  in edr_handle_event()
223 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in pci_acpi_add_edr_notifier()
227 		pci_dbg(pdev, "No valid ACPI node, skipping EDR init\n");  in pci_acpi_add_edr_notifier()
231 	status = acpi_install_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,  in pci_acpi_add_edr_notifier()
234 		pci_err(pdev, "Failed to install notify handler\n");  in pci_acpi_add_edr_notifier()
239 		acpi_remove_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,  in pci_acpi_add_edr_notifier()
242 		pci_dbg(pdev, "Notify handler installed\n");  in pci_acpi_add_edr_notifier()
247 	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);  in pci_acpi_remove_edr_notifier()
252 	acpi_remove_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,  in pci_acpi_remove_edr_notifier()
254 	pci_dbg(pdev, "Notify handler removed\n");  in pci_acpi_remove_edr_notifier()