generic.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <acpi/acpigen.h>
#include <acpi/acpigen_pci.h>
#include <device/device.h>
#include <device/pci.h>
#include "chip.h"
 
static const char *pcie_generic_acpi_name(const struct device *dev)
{
        struct drivers_pcie_generic_config *config = dev->chip_info;
 
        if (config->companion_dev)
                return acpi_device_name(config->companion_dev);
        return "DEV0";
}
 
static void pcie_generic_fill_ssdt(const struct device *dev)
{
        struct drivers_pcie_generic_config *config;
        struct acpi_dp *dsd;
 
        if (!is_dev_enabled(dev))
                return;
 
        pci_rom_ssdt(dev);
 
        config = dev->chip_info;
        if (!config || !config->is_untrusted || !dev->bus || !dev->bus->dev)
                return;
 
        const char *scope;
        const char *name;
 
        /* Code will be generated under companion device instead if present. */
        if (config->companion_dev)
                scope = acpi_device_path(config->companion_dev);
        else
                scope = acpi_device_path(dev->bus->dev);
        name = acpi_device_name(dev);
        acpigen_write_scope(scope);
        if (!config->companion_dev) {
                acpigen_write_device(name);
                acpigen_write_ADR_pci_device(dev);
        }
        dsd = acpi_dp_new_table("_DSD");
        acpi_dp_add_integer(dsd, "DmaProperty", 1);
        acpi_dp_write(dsd);
        if (!config->companion_dev)
                acpigen_write_device_end();
        acpigen_write_scope_end();
 
        printk(BIOS_INFO, "%s.%s: Enable ACPI properties for %s (%s)\n", scope, name,
                dev_path(dev), dev->chip_ops->name);
}
 
struct device_operations pcie_generic_ops = {
        .read_resources         = pci_dev_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = pci_dev_enable_resources,
        .init                   = pci_dev_init,
        .ops_pci                = &pci_dev_ops_pci,
        .acpi_name              = pcie_generic_acpi_name,
        .acpi_fill_ssdt         = pcie_generic_fill_ssdt,
};
 
static void pcie_generic_enable(struct device *dev)
{
        dev->ops = &pcie_generic_ops;
}
 
struct chip_operations drivers_pcie_generic_ops = {
        CHIP_NAME("PCIe Device")
        .enable_dev = pcie_generic_enable
};