1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright(c) 2021 Intel Corporation. All rights reserved. */
3
4 #include <linux/platform_device.h>
5 #include <linux/device.h>
6 #include <linux/acpi.h>
7 #include <cxl.h>
8 #include "test/mock.h"
9
10 struct acpi_device *to_cxl_host_bridge(struct device *host, struct device *dev)
11 {
12 int index;
13 struct acpi_device *adev, *found = NULL;
14 struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
15
16 if (ops && ops->is_mock_bridge(dev)) {
17 found = ACPI_COMPANION(dev);
18 goto out;
19 }
20
21 if (dev->bus == &platform_bus_type)
22 goto out;
23
24 adev = to_acpi_device(dev);
25 if (!acpi_pci_find_root(adev->handle))
26 goto out;
27
28 if (strcmp(acpi_device_hid(adev), "ACPI0016") == 0) {
29 found = adev;
30 dev_dbg(host, "found host bridge %s\n", dev_name(&adev->dev));
31 }
32 out:
33 put_cxl_mock_ops(index);
34 return found;
35 }
36
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