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authorChristian Borntraeger <cborntra@de.ibm.com>2005-06-26 01:55:32 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-26 03:24:37 +0400
commit6b979de395c7e1b7e59f74a870e1d1911853eccb (patch)
tree82502e9e93c977b0f812d017f5d8d4e12436c6c8 /drivers/s390/char/vmcp.h
parent77fa22450de00d535de2cc8be653983560828000 (diff)
downloadlinux-6b979de395c7e1b7e59f74a870e1d1911853eccb.tar.xz
[PATCH] s390: add vmcp interface
Add interface to issue VM control program commands. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/char/vmcp.h')
-rw-r--r--drivers/s390/char/vmcp.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/s390/char/vmcp.h b/drivers/s390/char/vmcp.h
new file mode 100644
index 000000000000..87389e730465
--- /dev/null
+++ b/drivers/s390/char/vmcp.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2004, 2005 IBM Corporation
+ * Interface implementation for communication with the v/VM control program
+ * Version 1.0
+ * Author(s): Christian Borntraeger <cborntra@de.ibm.com>
+ *
+ *
+ * z/VMs CP offers the possibility to issue commands via the diagnose code 8
+ * this driver implements a character device that issues these commands and
+ * returns the answer of CP.
+ *
+ * The idea of this driver is based on cpint from Neale Ferguson
+ */
+
+#include <asm/semaphore.h>
+#include <linux/ioctl.h>
+
+#define VMCP_GETCODE _IOR(0x10, 1, int)
+#define VMCP_SETBUF _IOW(0x10, 2, int)
+#define VMCP_GETSIZE _IOR(0x10, 3, int)
+
+struct vmcp_session {
+ unsigned int bufsize;
+ char *response;
+ int resp_size;
+ int resp_code;
+ /* As we use copy_from/to_user, which might *
+ * sleep and cannot use a spinlock */
+ struct semaphore mutex;
+};