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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2008-08-01 20:42:05 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-08-01 20:42:05 +0200
commitc6557e7f2b6ae76a44653d38f835174074c42e05 (patch)
treeda619a76b309cb1cd259d082af768a83cfcd6d52 /arch/s390/include/asm/cmb.h
parentab4227cb2d936886069ef1056c02500d05beb15d (diff)
[S390] move include/asm-s390 to arch/s390/include/asm
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/cmb.h')
-rw-r--r--arch/s390/include/asm/cmb.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cmb.h b/arch/s390/include/asm/cmb.h
new file mode 100644
index 000000000000..50196857d27a
--- /dev/null
+++ b/arch/s390/include/asm/cmb.h
@@ -0,0 +1,58 @@
+#ifndef S390_CMB_H
+#define S390_CMB_H
+/**
+ * struct cmbdata - channel measurement block data for user space
+ * @size: size of the stored data
+ * @elapsed_time: time since last sampling
+ * @ssch_rsch_count: number of ssch and rsch
+ * @sample_count: number of samples
+ * @device_connect_time: time of device connect
+ * @function_pending_time: time of function pending
+ * @device_disconnect_time: time of device disconnect
+ * @control_unit_queuing_time: time of control unit queuing
+ * @device_active_only_time: time of device active only
+ * @device_busy_time: time of device busy (ext. format)
+ * @initial_command_response_time: initial command response time (ext. format)
+ *
+ * All values are stored as 64 bit for simplicity, especially
+ * in 32 bit emulation mode. All time values are normalized to
+ * nanoseconds.
+ * Currently, two formats are known, which differ by the size of
+ * this structure, i.e. the last two members are only set when
+ * the extended channel measurement facility (first shipped in
+ * z990 machines) is activated.
+ * Potentially, more fields could be added, which would result in a
+ * new ioctl number.
+ */
+struct cmbdata {
+ __u64 size;
+ __u64 elapsed_time;
+ /* basic and exended format: */
+ __u64 ssch_rsch_count;
+ __u64 sample_count;
+ __u64 device_connect_time;
+ __u64 function_pending_time;
+ __u64 device_disconnect_time;
+ __u64 control_unit_queuing_time;
+ __u64 device_active_only_time;
+ /* extended format only: */
+ __u64 device_busy_time;
+ __u64 initial_command_response_time;
+};
+
+/* enable channel measurement */
+#define BIODASDCMFENABLE _IO(DASD_IOCTL_LETTER, 32)
+/* enable channel measurement */
+#define BIODASDCMFDISABLE _IO(DASD_IOCTL_LETTER, 33)
+/* read channel measurement data */
+#define BIODASDREADALLCMB _IOWR(DASD_IOCTL_LETTER, 33, struct cmbdata)
+
+#ifdef __KERNEL__
+struct ccw_device;
+extern int enable_cmf(struct ccw_device *cdev);
+extern int disable_cmf(struct ccw_device *cdev);
+extern u64 cmf_read(struct ccw_device *cdev, int index);
+extern int cmf_readall(struct ccw_device *cdev, struct cmbdata *data);
+
+#endif /* __KERNEL__ */
+#endif /* S390_CMB_H */

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