Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* Copyright(c) 2016 - 2018 Intel Corporation. All rights reserved. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <linux/percpu-refcount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <linux/memremap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/pfn_t.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/nd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include "../bus.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /* we need the private definitions to implement compat suport */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "../dax-private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static int dax_pmem_compat_probe(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	struct dev_dax *dev_dax = __dax_pmem_probe(dev, DEV_DAX_CLASS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	if (IS_ERR(dev_dax))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		return PTR_ERR(dev_dax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)         if (!devres_open_group(&dev_dax->dev, dev_dax, GFP_KERNEL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	device_lock(&dev_dax->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	rc = dev_dax_probe(dev_dax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	device_unlock(&dev_dax->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	devres_close_group(&dev_dax->dev, dev_dax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		devres_release_group(&dev_dax->dev, dev_dax);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static int dax_pmem_compat_release(struct device *dev, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	device_lock(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	devres_release_group(dev, to_dev_dax(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	device_unlock(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int dax_pmem_compat_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	device_for_each_child(dev, NULL, dax_pmem_compat_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static struct nd_device_driver dax_pmem_compat_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	.probe = dax_pmem_compat_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	.remove = dax_pmem_compat_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	.drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		.name = "dax_pmem_compat",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	.type = ND_DRIVER_DAX_PMEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int __init dax_pmem_compat_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	return nd_driver_register(&dax_pmem_compat_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) module_init(dax_pmem_compat_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static void __exit dax_pmem_compat_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	driver_unregister(&dax_pmem_compat_driver.drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) module_exit(dax_pmem_compat_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) MODULE_AUTHOR("Intel Corporation");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM);