From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/infiniband/hw/hfi1/device.c | 132 ++++++++++++++++++++++++++++++++++++ 1 file changed, 132 insertions(+) create mode 100644 drivers/infiniband/hw/hfi1/device.c (limited to 'drivers/infiniband/hw/hfi1/device.c') diff --git a/drivers/infiniband/hw/hfi1/device.c b/drivers/infiniband/hw/hfi1/device.c new file mode 100644 index 0000000000..b0a00b7aae --- /dev/null +++ b/drivers/infiniband/hw/hfi1/device.c @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause +/* + * Copyright(c) 2015, 2016 Intel Corporation. + */ + +#include +#include +#include + +#include "hfi.h" +#include "device.h" + +static char *hfi1_devnode(const struct device *dev, umode_t *mode) +{ + if (mode) + *mode = 0600; + return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); +} + +static const struct class class = { + .name = "hfi1", + .devnode = hfi1_devnode, +}; + +static char *hfi1_user_devnode(const struct device *dev, umode_t *mode) +{ + if (mode) + *mode = 0666; + return kasprintf(GFP_KERNEL, "%s", dev_name(dev)); +} + +static const struct class user_class = { + .name = "hfi1_user", + .devnode = hfi1_user_devnode, +}; +static dev_t hfi1_dev; + +int hfi1_cdev_init(int minor, const char *name, + const struct file_operations *fops, + struct cdev *cdev, struct device **devp, + bool user_accessible, + struct kobject *parent) +{ + const dev_t dev = MKDEV(MAJOR(hfi1_dev), minor); + struct device *device = NULL; + int ret; + + cdev_init(cdev, fops); + cdev->owner = THIS_MODULE; + cdev_set_parent(cdev, parent); + kobject_set_name(&cdev->kobj, name); + + ret = cdev_add(cdev, dev, 1); + if (ret < 0) { + pr_err("Could not add cdev for minor %d, %s (err %d)\n", + minor, name, -ret); + goto done; + } + + if (user_accessible) + device = device_create(&user_class, NULL, dev, NULL, "%s", name); + else + device = device_create(&class, NULL, dev, NULL, "%s", name); + + if (IS_ERR(device)) { + ret = PTR_ERR(device); + device = NULL; + pr_err("Could not create device for minor %d, %s (err %d)\n", + minor, name, -ret); + cdev_del(cdev); + } +done: + *devp = device; + return ret; +} + +void hfi1_cdev_cleanup(struct cdev *cdev, struct device **devp) +{ + struct device *device = *devp; + + if (device) { + device_unregister(device); + *devp = NULL; + + cdev_del(cdev); + } +} + +static const char *hfi1_class_name = "hfi1"; + +const char *class_name(void) +{ + return hfi1_class_name; +} + +int __init dev_init(void) +{ + int ret; + + ret = alloc_chrdev_region(&hfi1_dev, 0, HFI1_NMINORS, DRIVER_NAME); + if (ret < 0) { + pr_err("Could not allocate chrdev region (err %d)\n", -ret); + goto done; + } + + ret = class_register(&class); + if (ret) { + pr_err("Could not create device class (err %d)\n", -ret); + unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); + goto done; + } + + ret = class_register(&user_class); + if (ret) { + pr_err("Could not create device class for user accessible files (err %d)\n", + -ret); + class_unregister(&class); + unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); + goto done; + } + +done: + return ret; +} + +void dev_cleanup(void) +{ + class_unregister(&class); + class_unregister(&user_class); + + unregister_chrdev_region(hfi1_dev, HFI1_NMINORS); +} -- cgit v1.2.3