36 lines
829 B
C
36 lines
829 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright(c) 2021 Intel Corporation. All rights reserved. */
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/acpi.h>
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#include <cxl.h>
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#include "test/mock.h"
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struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
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{
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int index;
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struct acpi_device *adev, *found = NULL;
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struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
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if (ops && ops->is_mock_bridge(dev)) {
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found = ACPI_COMPANION(dev);
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goto out;
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}
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if (dev->bus == &platform_bus_type)
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goto out;
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adev = to_acpi_device(dev);
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if (!acpi_pci_find_root(adev->handle))
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goto out;
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if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
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found = adev;
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dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
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}
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out:
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put_cxl_mock_ops(index);
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return found;
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}
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