1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright(c) 2026 Intel Corporation. All rights reserved.
3
4 #include <linux/platform_device.h>
5 #include <linux/mod_devicetable.h>
6 #include <linux/module.h>
7 #include <linux/sizes.h>
8 #include <cxl/mailbox.h>
9 #include <cxlmem.h>
10
11 struct mock_cxl_accel {
12 struct cxl_dev_state cxlds;
13 struct cxl_memdev *cxlmd;
14 };
15
cxl_mock_accel_probe(struct platform_device * pdev)16 static int cxl_mock_accel_probe(struct platform_device *pdev)
17 {
18 struct mock_cxl_accel *cxl_accel;
19 struct device *dev = &pdev->dev;
20 struct cxl_dev_state *cxlds;
21 struct cxl_memdev *cxlmd;
22 struct range mock_range;
23 int rc;
24
25 cxl_accel = devm_cxl_dev_state_create(&pdev->dev, CXL_DEVTYPE_DEVMEM,
26 pdev->id + 1, 0,
27 struct mock_cxl_accel, cxlds,
28 false);
29 if (!cxl_accel)
30 return -ENOMEM;
31
32 cxlds = &cxl_accel->cxlds;
33 cxlds->media_ready = true;
34 rc = cxl_set_capacity(cxlds, SZ_512M);
35 if (rc)
36 return rc;
37
38 cxlmd = devm_cxl_probe_mem(cxlds, &mock_range);
39 if (IS_ERR(cxlmd))
40 return PTR_ERR(cxlmd);
41 cxl_accel->cxlmd = cxlmd;
42
43 dev_dbg(dev, "Probed mock accelerator with range %pra\n", &mock_range);
44
45 return 0;
46 }
47
48 static const struct platform_device_id cxl_mock_accel_ids[] = {
49 { .name = "cxl_type2_accel" },
50 { }
51 };
52 MODULE_DEVICE_TABLE(platform, cxl_mock_accel_ids);
53
54 static struct platform_driver cxl_mock_accel_driver = {
55 .probe = cxl_mock_accel_probe,
56 .id_table = cxl_mock_accel_ids,
57 .driver = {
58 .name = KBUILD_MODNAME,
59 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
60 },
61 };
62
63 module_platform_driver(cxl_mock_accel_driver);
64 MODULE_LICENSE("GPL");
65 MODULE_DESCRIPTION("cxl_test: accelerator device mock module");
66 MODULE_IMPORT_NS("CXL");
67