Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / s390 / char / vmur.h

diff --git a/kernel/drivers/s390/char/vmur.h b/kernel/drivers/s390/char/vmur.h
new file mode 100644 (file)
index 0000000..fa320ad
--- /dev/null
+++ b/kernel/drivers/s390/char/vmur.h
@@ -0,0 +1,110 @@
+/*
+ * 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_SYSTEM_HOLD        0x04
+#define FLG_CP_DUMP    0x10
+#define FLG_USER_HOLD  0x20
+#define FLG_IN_USE     0x80
+
+/*
+ * 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 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 */
+       atomic_t ref_count;             /* reference counter */
+       wait_queue_head_t wait;         /* wait queue to serialize open */
+       int open_flag;                  /* "urdev is open" flag */
+       spinlock_t open_lock;           /* serialize critical sections */
+};
+
+/*
+ * 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_ */