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authorAndrea Bastoni <bastoni@cs.unc.edu>2009-12-17 21:24:47 -0500
committerAndrea Bastoni <bastoni@cs.unc.edu>2010-05-29 17:12:00 -0400
commitcf3f4bd8db320f3f487d66bdec924e926f004787 (patch)
tree541206678cd3b2d58911a1f71ea0c4276af9643c /include/litmus/ftdev.h
parent4b38febbd59fd33542a343991262119eb9860f5e (diff)
[ported from 2008.3] Add Feather-Trace device file support
Diffstat (limited to 'include/litmus/ftdev.h')
-rw-r--r--include/litmus/ftdev.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/include/litmus/ftdev.h b/include/litmus/ftdev.h
new file mode 100644
index 000000000000..7697b4616699
--- /dev/null
+++ b/include/litmus/ftdev.h
@@ -0,0 +1,49 @@
1#ifndef _LITMUS_FTDEV_H_
2#define _LITMUS_FTDEV_H_
3
4#include <litmus/feather_trace.h>
5#include <litmus/feather_buffer.h>
6#include <linux/mutex.h>
7#include <linux/cdev.h>
8
9#define MAX_FTDEV_MINORS NR_CPUS
10
11#define FTDEV_ENABLE_CMD 0
12#define FTDEV_DISABLE_CMD 1
13
14struct ftdev;
15
16/* return 0 if buffer can be opened, otherwise -$REASON */
17typedef int (*ftdev_can_open_t)(struct ftdev* dev, unsigned int buf_no);
18/* return 0 on success, otherwise -$REASON */
19typedef int (*ftdev_alloc_t)(struct ftdev* dev, unsigned int buf_no);
20typedef void (*ftdev_free_t)(struct ftdev* dev, unsigned int buf_no);
21
22
23struct ftdev_event;
24
25struct ftdev_minor {
26 struct ft_buffer* buf;
27 unsigned int readers;
28 struct mutex lock;
29 /* FIXME: filter for authorized events */
30 struct ftdev_event* events;
31};
32
33struct ftdev {
34 struct cdev cdev;
35 /* FIXME: don't waste memory, allocate dynamically */
36 struct ftdev_minor minor[MAX_FTDEV_MINORS];
37 unsigned int minor_cnt;
38 ftdev_alloc_t alloc;
39 ftdev_free_t free;
40 ftdev_can_open_t can_open;
41};
42
43struct ft_buffer* alloc_ft_buffer(unsigned int count, size_t size);
44void free_ft_buffer(struct ft_buffer* buf);
45
46void ftdev_init(struct ftdev* ftdev, struct module* owner);
47int register_ftdev(struct ftdev* ftdev, const char* name, int major);
48
49#endif