Commit | Line | Data |
---|---|---|
f30664e2 SO |
1 | /* |
2 | * Device driver for s390 storage class memory. | |
3 | * | |
4 | * Copyright IBM Corp. 2012 | |
5 | * Author(s): Sebastian Ott <sebott@linux.vnet.ibm.com> | |
6 | */ | |
7 | ||
8 | #define KMSG_COMPONENT "scm_block" | |
9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
10 | ||
11 | #include <linux/module.h> | |
f30664e2 SO |
12 | #include <linux/slab.h> |
13 | #include <asm/eadm.h> | |
14 | #include "scm_blk.h" | |
15 | ||
93481c90 | 16 | static void scm_notify(struct scm_device *scmdev, enum scm_event event) |
f30664e2 | 17 | { |
aebfa669 SO |
18 | struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev); |
19 | ||
93481c90 SO |
20 | switch (event) { |
21 | case SCM_CHANGE: | |
3bff6038 | 22 | pr_info("%lx: The capabilities of the SCM increment changed\n", |
93481c90 SO |
23 | (unsigned long) scmdev->address); |
24 | SCM_LOG(2, "State changed"); | |
25 | SCM_LOG_STATE(2, scmdev); | |
26 | break; | |
aebfa669 SO |
27 | case SCM_AVAIL: |
28 | SCM_LOG(2, "Increment available"); | |
29 | SCM_LOG_STATE(2, scmdev); | |
30 | scm_blk_set_available(bdev); | |
31 | break; | |
93481c90 | 32 | } |
f30664e2 SO |
33 | } |
34 | ||
35 | static int scm_probe(struct scm_device *scmdev) | |
36 | { | |
37 | struct scm_blk_dev *bdev; | |
38 | int ret; | |
39 | ||
40 | SCM_LOG(2, "probe"); | |
41 | SCM_LOG_STATE(2, scmdev); | |
42 | ||
43 | if (scmdev->attrs.oper_state != OP_STATE_GOOD) | |
44 | return -EINVAL; | |
45 | ||
46 | bdev = kzalloc(sizeof(*bdev), GFP_KERNEL); | |
47 | if (!bdev) | |
48 | return -ENOMEM; | |
49 | ||
f30664e2 | 50 | dev_set_drvdata(&scmdev->dev, bdev); |
f30664e2 SO |
51 | ret = scm_blk_dev_setup(bdev, scmdev); |
52 | if (ret) { | |
f30664e2 | 53 | dev_set_drvdata(&scmdev->dev, NULL); |
f30664e2 SO |
54 | kfree(bdev); |
55 | goto out; | |
56 | } | |
57 | ||
58 | out: | |
59 | return ret; | |
60 | } | |
61 | ||
62 | static int scm_remove(struct scm_device *scmdev) | |
63 | { | |
c3e6d407 | 64 | struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev); |
f30664e2 | 65 | |
f30664e2 | 66 | scm_blk_dev_cleanup(bdev); |
24996edc | 67 | dev_set_drvdata(&scmdev->dev, NULL); |
f30664e2 SO |
68 | kfree(bdev); |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | static struct scm_driver scm_drv = { | |
74 | .drv = { | |
75 | .name = "scm_block", | |
76 | .owner = THIS_MODULE, | |
77 | }, | |
93481c90 | 78 | .notify = scm_notify, |
f30664e2 SO |
79 | .probe = scm_probe, |
80 | .remove = scm_remove, | |
81 | .handler = scm_blk_irq, | |
82 | }; | |
83 | ||
84 | int __init scm_drv_init(void) | |
85 | { | |
86 | return scm_driver_register(&scm_drv); | |
87 | } | |
88 | ||
89 | void scm_drv_cleanup(void) | |
90 | { | |
91 | scm_driver_unregister(&scm_drv); | |
92 | } |