[S390] z/VM unit record device driver
z/VM Unit record character device driver to access VM reader, punch,
and printer.
Signed-off-by: Frank Munzert <munzert@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/char/vmur.h b/drivers/s390/char/vmur.h
new file mode 100644
index 0000000..16d0a4e
--- /dev/null
+++ b/drivers/s390/char/vmur.h
@@ -0,0 +1,104 @@
+/*
+ * Linux driver for System z and s390 unit record devices
+ * (z/VM virtual punch, reader, printer)
+ *
+ * Copyright IBM Corp. 2001, 2007
+ * Authors: Malcolm Beattie <beattiem@uk.ibm.com>
+ * Michael Holzheu <holzheu@de.ibm.com>
+ * Frank Munzert <munzert@de.ibm.com>
+ */
+
+#ifndef _VMUR_H_
+#define _VMUR_H_
+
+#define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */
+#define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */
+/*
+ * we only support z/VM's default unit record devices:
+ * both in SPOOL directory control statement and in CP DEFINE statement
+ * RDR defaults to 2540 reader
+ * PUN defaults to 2540 punch
+ * PRT defaults to 1403 printer
+ */
+#define READER_PUNCH_DEVTYPE 0x2540
+#define PRINTER_DEVTYPE 0x1403
+
+/* z/VM spool file control block SFBLOK */
+struct file_control_block {
+ char reserved_1[8];
+ char user_owner[8];
+ char user_orig[8];
+ __s32 data_recs;
+ __s16 rec_len;
+ __s16 file_num;
+ __u8 file_stat;
+ __u8 dev_type;
+ char reserved_2[6];
+ char file_name[12];
+ char file_type[12];
+ char create_date[8];
+ char create_time[8];
+ char reserved_3[6];
+ __u8 file_class;
+ __u8 sfb_lok;
+ __u64 distr_code;
+ __u32 reserved_4;
+ __u8 current_starting_copy_number;
+ __u8 sfblock_cntrl_flags;
+ __u8 reserved_5;
+ __u8 more_status_flags;
+ char rest[200];
+} __attribute__ ((packed));
+
+#define FLG_CP_DUMP 0x10
+
+/*
+ * A struct urdev is created for each ur device that is made available
+ * via the ccw_device driver model.
+ */
+struct urdev {
+ struct ccw_device *cdev; /* Backpointer to ccw device */
+ struct mutex io_mutex; /* Serialises device IO */
+ struct mutex open_mutex; /* Serialises access to device */
+ struct completion *io_done; /* do_ur_io waits; irq completes */
+ struct device *device;
+ struct cdev *char_device;
+ struct ccw_dev_id dev_id; /* device id */
+ size_t reclen; /* Record length for *write* CCWs */
+ int class; /* VM device class */
+ int io_request_rc; /* return code from I/O request */
+};
+
+/*
+ * A struct urfile is allocated at open() time for each device and
+ * freed on release().
+ */
+struct urfile {
+ struct urdev *urd;
+ unsigned int flags;
+ size_t dev_reclen;
+ __u16 file_reclen;
+};
+
+/*
+ * Device major/minor definitions.
+ */
+
+#define UR_MAJOR 0 /* get dynamic major */
+/*
+ * We map minor numbers directly to device numbers (0-FFFF) for simplicity.
+ * This avoids having to allocate (and manage) slot numbers.
+ */
+#define NUM_MINORS 65536
+
+/* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */
+#define MAX_RECS_PER_IO 511
+#define WRITE_CCW_CMD 0x01
+
+#define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x)
+#define CCWDEV_CU_DI(cutype, di) \
+ CCW_DEVICE(cutype, 0x00), .driver_info = (di)
+
+#define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */
+
+#endif /* _VMUR_H_ */