| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpi_device.h> |
| #include <acpi/acpigen.h> |
| #include <acpi/acpigen_pci.h> |
| #include <amdblocks/amd_pci_util.h> |
| #include <assert.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pciexp.h> |
| #include <soc/pci_devs.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| static const char *pcie_gpp_acpi_name(const struct device *dev) |
| { |
| char *name; |
| |
| if (dev->path.type != DEVICE_PATH_PCI) |
| return NULL; |
| |
| name = malloc(ACPI_NAME_BUFFER_SIZE); |
| snprintf(name, ACPI_NAME_BUFFER_SIZE, "GP%02X", dev->path.pci.devfn); |
| name[4] = '\0'; |
| |
| return name; |
| } |
| |
| static void acpi_device_write_gpp_pci_dev(const struct device *dev) |
| { |
| const char *scope = acpi_device_scope(dev); |
| const char *name = acpi_device_name(dev); |
| |
| assert(dev->path.type == DEVICE_PATH_PCI); |
| assert(name); |
| assert(scope); |
| |
| acpigen_write_scope(scope); |
| acpigen_write_device(name); |
| |
| acpigen_write_ADR_pci_device(dev); |
| acpigen_write_STA(acpi_device_status(dev)); |
| |
| acpigen_write_pci_GNB_PRT(dev); |
| |
| acpigen_pop_len(); /* Device */ |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| /* Latency tolerance reporting, max snoop/non-snoop latency value 1.049ms */ |
| #define PCIE_LTR_MAX_LATENCY_1049US 0x1001 |
| |
| static void pcie_get_ltr_max_latencies(u16 *max_snoop, u16 *max_nosnoop) |
| { |
| *max_snoop = PCIE_LTR_MAX_LATENCY_1049US; |
| *max_nosnoop = PCIE_LTR_MAX_LATENCY_1049US; |
| } |
| |
| static struct pci_operations pcie_ops = { |
| .get_ltr_max_latencies = pcie_get_ltr_max_latencies, |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| struct device_operations amd_internal_pcie_gpp_ops = { |
| .read_resources = pci_bus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_bus_enable_resources, |
| .scan_bus = pci_scan_bridge, |
| .reset_bus = pci_bus_reset, |
| .acpi_name = pcie_gpp_acpi_name, |
| .acpi_fill_ssdt = acpi_device_write_gpp_pci_dev, |
| }; |
| |
| struct device_operations amd_external_pcie_gpp_ops = { |
| .read_resources = pci_bus_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_bus_enable_resources, |
| .scan_bus = pciexp_scan_bridge, |
| .reset_bus = pci_bus_reset, |
| .acpi_name = pcie_gpp_acpi_name, |
| .acpi_fill_ssdt = acpi_device_write_gpp_pci_dev, |
| .ops_pci = &pcie_ops, |
| }; |