2 * Device driver for s390 storage class memory.
4 * Copyright IBM Corp. 2012
5 * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com>
8 #define KMSG_COMPONENT "scm_block"
9 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11 #include <linux/module.h>
12 #include <linux/slab.h>
16 static void scm_notify(struct scm_device *scmdev, enum scm_event event)
18 struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
22 pr_info("%lx: The capabilities of the SCM increment changed\n",
23 (unsigned long) scmdev->address);
24 SCM_LOG(2, "State changed");
25 SCM_LOG_STATE(2, scmdev);
28 SCM_LOG(2, "Increment available");
29 SCM_LOG_STATE(2, scmdev);
30 scm_blk_set_available(bdev);
35 static int scm_probe(struct scm_device *scmdev)
37 struct scm_blk_dev *bdev;
41 SCM_LOG_STATE(2, scmdev);
43 if (scmdev->attrs.oper_state != OP_STATE_GOOD)
46 bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
50 dev_set_drvdata(&scmdev->dev, bdev);
51 ret = scm_blk_dev_setup(bdev, scmdev);
53 dev_set_drvdata(&scmdev->dev, NULL);
62 static int scm_remove(struct scm_device *scmdev)
64 struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
66 scm_blk_dev_cleanup(bdev);
67 dev_set_drvdata(&scmdev->dev, NULL);
73 static struct scm_driver scm_drv = {
81 .handler = scm_blk_irq,
84 int __init scm_drv_init(void)
86 return scm_driver_register(&scm_drv);
89 void scm_drv_cleanup(void)
91 scm_driver_unregister(&scm_drv);