// SPDX-License-Identifier: GPL-2.0 /* * Device driver for s390 storage class memory. * * Copyright IBM Corp. 2012 * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com> */ #define KMSG_COMPONENT "scm_block" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/module.h> #include <linux/slab.h> #include <asm/eadm.h> #include "scm_blk.h" static void scm_notify(struct scm_device *scmdev, enum scm_event event) { struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev); switch (event) { case SCM_CHANGE: pr_info("%lx: The capabilities of the SCM increment changed\n", (unsigned long) scmdev->address); SCM_LOG(2, "State changed"); SCM_LOG_STATE(2, scmdev); break; case SCM_AVAIL: SCM_LOG(2, "Increment available"); SCM_LOG_STATE(2, scmdev); scm_blk_set_available(bdev); break; } } static int scm_probe(struct scm_device *scmdev) { struct scm_blk_dev *bdev; int ret; SCM_LOG(2, "probe"); SCM_LOG_STATE(2, scmdev); if (scmdev->attrs.oper_state != OP_STATE_GOOD) return -EINVAL; bdev = kzalloc(sizeof(*bdev), GFP_KERNEL); if (!bdev) return -ENOMEM; dev_set_drvdata(&scmdev->dev, bdev); ret = scm_blk_dev_setup(bdev, scmdev); if (ret) { dev_set_drvdata(&scmdev->dev, NULL); kfree(bdev); goto out; } out: return ret; } static int scm_remove(struct scm_device *scmdev) { struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev); scm_blk_dev_cleanup(bdev); dev_set_drvdata(&scmdev->dev, NULL); kfree(bdev); return 0; } static struct scm_driver scm_drv = { .drv = { .name = "scm_block", .owner = THIS_MODULE, }, .notify = scm_notify, .probe = scm_probe, .remove = scm_remove, .handler = scm_blk_irq, }; int __init scm_drv_init(void) { return scm_driver_register(&scm_drv); } void scm_drv_cleanup(void) { scm_driver_unregister(&scm_drv); }