Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/include/asm-s390/cmb.h
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 2847 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | #ifndef S390_CMB_H |
2 | #define S390_CMB_H |
3 | /** |
4 | * struct cmbdata -- channel measurement block data for user space |
5 | * |
6 | * @size: size of the stored data |
7 | * @ssch_rsch_count: XXX |
8 | * @sample_count: |
9 | * @device_connect_time: |
10 | * @function_pending_time: |
11 | * @device_disconnect_time: |
12 | * @control_unit_queuing_time: |
13 | * @device_active_only_time: |
14 | * @device_busy_time: |
15 | * @initial_command_response_time: |
16 | * |
17 | * all values are stored as 64 bit for simplicity, especially |
18 | * in 32 bit emulation mode. All time values are normalized to |
19 | * nanoseconds. |
20 | * Currently, two formats are known, which differ by the size of |
21 | * this structure, i.e. the last two members are only set when |
22 | * the extended channel measurement facility (first shipped in |
23 | * z990 machines) is activated. |
24 | * Potentially, more fields could be added, which results in a |
25 | * new ioctl number. |
26 | **/ |
27 | struct cmbdata { |
28 | __u64 size; |
29 | __u64 elapsed_time; |
30 | /* basic and exended format: */ |
31 | __u64 ssch_rsch_count; |
32 | __u64 sample_count; |
33 | __u64 device_connect_time; |
34 | __u64 function_pending_time; |
35 | __u64 device_disconnect_time; |
36 | __u64 control_unit_queuing_time; |
37 | __u64 device_active_only_time; |
38 | /* extended format only: */ |
39 | __u64 device_busy_time; |
40 | __u64 initial_command_response_time; |
41 | }; |
42 | |
43 | /* enable channel measurement */ |
44 | #define BIODASDCMFENABLE _IO(DASD_IOCTL_LETTER,32) |
45 | /* enable channel measurement */ |
46 | #define BIODASDCMFDISABLE _IO(DASD_IOCTL_LETTER,33) |
47 | /* reset channel measurement block */ |
48 | #define BIODASDRESETCMB _IO(DASD_IOCTL_LETTER,34) |
49 | /* read channel measurement data */ |
50 | #define BIODASDREADCMB _IOWR(DASD_IOCTL_LETTER,32,u64) |
51 | /* read channel measurement data */ |
52 | #define BIODASDREADALLCMB _IOWR(DASD_IOCTL_LETTER,33,struct cmbdata) |
53 | |
54 | #ifdef __KERNEL__ |
55 | struct ccw_device; |
56 | /** |
57 | * enable_cmf() - switch on the channel measurement for a specific device |
58 | * @cdev: The ccw device to be enabled |
59 | * returns 0 for success or a negative error value. |
60 | * |
61 | * Context: |
62 | * non-atomic |
63 | **/ |
64 | extern int enable_cmf(struct ccw_device *cdev); |
65 | |
66 | /** |
67 | * disable_cmf() - switch off the channel measurement for a specific device |
68 | * @cdev: The ccw device to be disabled |
69 | * returns 0 for success or a negative error value. |
70 | * |
71 | * Context: |
72 | * non-atomic |
73 | **/ |
74 | extern int disable_cmf(struct ccw_device *cdev); |
75 | |
76 | /** |
77 | * cmf_read() - read one value from the current channel measurement block |
78 | * @cmf: the channel to be read |
79 | * @index: the name of the value that is read |
80 | * |
81 | * Context: |
82 | * any |
83 | **/ |
84 | |
85 | extern u64 cmf_read(struct ccw_device *cdev, int index); |
86 | /** |
87 | * cmf_readall() - read one value from the current channel measurement block |
88 | * @cmf: the channel to be read |
89 | * @data: a pointer to a data block that will be filled |
90 | * |
91 | * Context: |
92 | * any |
93 | **/ |
94 | extern int cmf_readall(struct ccw_device *cdev, struct cmbdata*data); |
95 | extern void cmf_reset(struct ccw_device *cdev); |
96 | |
97 | #endif /* __KERNEL__ */ |
98 | #endif /* S390_CMB_H */ |