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