Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 384 insertions, 0 deletions

diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
new file mode 100644
index 000000000000..d04e6c2c3cc1
--- /dev/null
+++ b/drivers/s390/char/tape.h
@@ -0,0 +1,384 @@
+/*
+ *  drivers/s390/char/tape.h
+ *    tape device driver for 3480/3490E/3590 tapes.
+ *
+ *  S390 and zSeries version
+ *    Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Carsten Otte <cotte@de.ibm.com>
+ *               Tuan Ngo-Anh <ngoanh@de.ibm.com>
+ *               Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef _TAPE_H
+#define _TAPE_H
+
+#include <asm/ccwdev.h>
+#include <asm/debug.h>
+#include <asm/idals.h>
+#include <linux/config.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mtio.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+
+struct gendisk;
+
+/*
+ * Define DBF_LIKE_HELL for lots of messages in the debug feature.
+ */
+#define DBF_LIKE_HELL
+#ifdef  DBF_LIKE_HELL
+#define DBF_LH(level, str, ...) \
+do { \
+        debug_sprintf_event(TAPE_DBF_AREA, level, str, ## __VA_ARGS__); \
+} while (0)
+#else
+#define DBF_LH(level, str, ...) do {} while(0)
+#endif
+
+/*
+ * macros s390 debug feature (dbf)
+ */
+#define DBF_EVENT(d_level, d_str...) \
+do { \
+        debug_sprintf_event(TAPE_DBF_AREA, d_level, d_str); \
+} while (0)
+
+#define DBF_EXCEPTION(d_level, d_str...) \
+do { \
+        debug_sprintf_exception(TAPE_DBF_AREA, d_level, d_str); \
+} while (0)
+
+#define TAPE_VERSION_MAJOR 2
+#define TAPE_VERSION_MINOR 0
+#define TAPE_MAGIC "tape"
+
+#define TAPE_MINORS_PER_DEV 2       /* two minors per device */
+#define TAPEBLOCK_HSEC_SIZE     2048
+#define TAPEBLOCK_HSEC_S2B      2
+#define TAPEBLOCK_RETRIES       5
+
+enum tape_medium_state {
+        MS_UNKNOWN,
+        MS_LOADED,
+        MS_UNLOADED,
+        MS_SIZE
+};
+
+enum tape_state {
+        TS_UNUSED=0,
+        TS_IN_USE,
+        TS_BLKUSE,
+        TS_INIT,
+        TS_NOT_OPER,
+        TS_SIZE
+};
+
+enum tape_op {
+        TO_BLOCK,       /* Block read */
+        TO_BSB,         /* Backward space block */
+        TO_BSF,         /* Backward space filemark */
+        TO_DSE,         /* Data security erase */
+        TO_FSB,         /* Forward space block */
+        TO_FSF,         /* Forward space filemark */
+        TO_LBL,         /* Locate block label */
+        TO_NOP,         /* No operation */
+        TO_RBA,         /* Read backward */
+        TO_RBI,         /* Read block information */
+        TO_RFO,         /* Read forward */
+        TO_REW,         /* Rewind tape */
+        TO_RUN,         /* Rewind and unload tape */
+        TO_WRI,         /* Write block */
+        TO_WTM,         /* Write tape mark */
+        TO_MSEN,        /* Medium sense */
+        TO_LOAD,        /* Load tape */
+        TO_READ_CONFIG, /* Read configuration data */
+        TO_READ_ATTMSG, /* Read attention message */
+        TO_DIS,         /* Tape display */
+        TO_ASSIGN,      /* Assign tape to channel path */
+        TO_UNASSIGN,    /* Unassign tape from channel path */
+        TO_SIZE         /* #entries in tape_op_t */
+};
+
+/* Forward declaration */
+struct tape_device;
+
+/* tape_request->status can be: */
+enum tape_request_status {
+        TAPE_REQUEST_INIT,      /* request is ready to be processed */
+        TAPE_REQUEST_QUEUED,    /* request is queued to be processed */
+        TAPE_REQUEST_IN_IO,     /* request is currently in IO */
+        TAPE_REQUEST_DONE,      /* request is completed. */
+};
+
+/* Tape CCW request */
+struct tape_request {
+        struct list_head list;          /* list head for request queueing. */
+        struct tape_device *device;     /* tape device of this request */
+        struct ccw1 *cpaddr;            /* address of the channel program. */
+        void *cpdata;                   /* pointer to ccw data. */
+        enum tape_request_status status;/* status of this request */
+        int options;                    /* options for execution. */
+        int retries;                    /* retry counter for error recovery. */
+        int rescnt;                     /* residual count from devstat. */
+
+        /* Callback for delivering final status. */
+        void (*callback)(struct tape_request *, void *);
+        void *callback_data;
+
+        enum tape_op op;
+        int rc;
+};
+
+/* Function type for magnetic tape commands */
+typedef int (*tape_mtop_fn)(struct tape_device *, int);
+
+/* Size of the array containing the mtops for a discipline */
+#define TAPE_NR_MTOPS (MTMKPART+1)
+
+/* Tape Discipline */
+struct tape_discipline {
+        struct module *owner;
+        int  (*setup_device)(struct tape_device *);
+        void (*cleanup_device)(struct tape_device *);
+        int (*irq)(struct tape_device *, struct tape_request *, struct irb *);
+        struct tape_request *(*read_block)(struct tape_device *, size_t);
+        struct tape_request *(*write_block)(struct tape_device *, size_t);
+        void (*process_eov)(struct tape_device*);
+#ifdef CONFIG_S390_TAPE_BLOCK
+        /* Block device stuff. */
+        struct tape_request *(*bread)(struct tape_device *, struct request *);
+        void (*check_locate)(struct tape_device *, struct tape_request *);
+        void (*free_bread)(struct tape_request *);
+#endif
+        /* ioctl function for additional ioctls. */
+        int (*ioctl_fn)(struct tape_device *, unsigned int, unsigned long);
+        /* Array of tape commands with TAPE_NR_MTOPS entries */
+        tape_mtop_fn *mtop_array;
+};
+
+/*
+ * The discipline irq function either returns an error code (<0) which
+ * means that the request has failed with an error or one of the following:
+ */
+#define TAPE_IO_SUCCESS 0       /* request successful */
+#define TAPE_IO_PENDING 1       /* request still running */
+#define TAPE_IO_RETRY   2       /* retry to current request */
+#define TAPE_IO_STOP    3       /* stop the running request */
+
+/* Char Frontend Data */
+struct tape_char_data {
+        struct idal_buffer *idal_buf;   /* idal buffer for user char data */
+        int block_size;                 /*   of size block_size. */
+};
+
+#ifdef CONFIG_S390_TAPE_BLOCK
+/* Block Frontend Data */
+struct tape_blk_data
+{
+        /* Block device request queue. */
+        request_queue_t *       request_queue;
+        spinlock_t              request_queue_lock;
+
+        /* Task to move entries from block request to CCS request queue. */
+        struct work_struct      requeue_task;
+        atomic_t                requeue_scheduled;
+
+        /* Current position on the tape. */
+        long                    block_position;
+        int                     medium_changed;
+        struct gendisk *        disk;
+};
+#endif
+
+/* Tape Info */
+struct tape_device {
+        /* entry in tape_device_list */
+        struct list_head                node;
+
+        int                             cdev_id;
+        struct ccw_device *             cdev;
+        struct tape_class_device *      nt;
+        struct tape_class_device *      rt;
+
+        /* Device discipline information. */
+        struct tape_discipline *        discipline;
+        void *                          discdata;
+
+        /* Generic status flags */
+        long                            tape_generic_status;
+
+        /* Device state information. */
+        wait_queue_head_t               state_change_wq;
+        enum tape_state                 tape_state;
+        enum tape_medium_state          medium_state;
+        unsigned char *                 modeset_byte;
+
+        /* Reference count. */
+        atomic_t                        ref_count;
+
+        /* Request queue. */
+        struct list_head                req_queue;
+
+        /* Each tape device has (currently) two minor numbers. */
+        int                             first_minor;
+
+        /* Number of tapemarks required for correct termination. */
+        int                             required_tapemarks;
+
+        /* Block ID of the BOF */
+        unsigned int                    bof;
+
+        /* Character device frontend data */
+        struct tape_char_data           char_data;
+#ifdef CONFIG_S390_TAPE_BLOCK
+        /* Block dev frontend data */
+        struct tape_blk_data            blk_data;
+#endif
+};
+
+/* Externals from tape_core.c */
+extern struct tape_request *tape_alloc_request(int cplength, int datasize);
+extern void tape_free_request(struct tape_request *);
+extern int tape_do_io(struct tape_device *, struct tape_request *);
+extern int tape_do_io_async(struct tape_device *, struct tape_request *);
+extern int tape_do_io_interruptible(struct tape_device *, struct tape_request *);
+void tape_hotplug_event(struct tape_device *, int major, int action);
+
+static inline int
+tape_do_io_free(struct tape_device *device, struct tape_request *request)
+{
+        int rc;
+
+        rc = tape_do_io(device, request);
+        tape_free_request(request);
+        return rc;
+}
+
+extern int tape_oper_handler(int irq, int status);
+extern void tape_noper_handler(int irq, int status);
+extern int tape_open(struct tape_device *);
+extern int tape_release(struct tape_device *);
+extern int tape_mtop(struct tape_device *, int, int);
+extern void tape_state_set(struct tape_device *, enum tape_state);
+
+extern int tape_generic_online(struct tape_device *, struct tape_discipline *);
+extern int tape_generic_offline(struct tape_device *device);
+
+/* Externals from tape_devmap.c */
+extern int tape_generic_probe(struct ccw_device *);
+extern void tape_generic_remove(struct ccw_device *);
+
+extern struct tape_device *tape_get_device(int devindex);
+extern struct tape_device *tape_get_device_reference(struct tape_device *);
+extern struct tape_device *tape_put_device(struct tape_device *);
+
+/* Externals from tape_char.c */
+extern int tapechar_init(void);
+extern void tapechar_exit(void);
+extern int  tapechar_setup_device(struct tape_device *);
+extern void tapechar_cleanup_device(struct tape_device *);
+
+/* Externals from tape_block.c */
+#ifdef CONFIG_S390_TAPE_BLOCK
+extern int tapeblock_init (void);
+extern void tapeblock_exit(void);
+extern int tapeblock_setup_device(struct tape_device *);
+extern void tapeblock_cleanup_device(struct tape_device *);
+#else
+static inline int tapeblock_init (void) {return 0;}
+static inline void tapeblock_exit (void) {;}
+static inline int tapeblock_setup_device(struct tape_device *t) {return 0;}
+static inline void tapeblock_cleanup_device (struct tape_device *t) {;}
+#endif
+
+/* tape initialisation functions */
+#ifdef CONFIG_PROC_FS
+extern void tape_proc_init (void);
+extern void tape_proc_cleanup (void);
+#else
+static inline void tape_proc_init (void) {;}
+static inline void tape_proc_cleanup (void) {;}
+#endif
+
+/* a function for dumping device sense info */
+extern void tape_dump_sense(struct tape_device *, struct tape_request *,
+                            struct irb *);
+extern void tape_dump_sense_dbf(struct tape_device *, struct tape_request *,
+                                struct irb *);
+
+/* functions for handling the status of a device */
+extern void tape_med_state_set(struct tape_device *, enum tape_medium_state);
+
+/* The debug area */
+extern debug_info_t *TAPE_DBF_AREA;
+
+/* functions for building ccws */
+static inline struct ccw1 *
+tape_ccw_cc(struct ccw1 *ccw, __u8 cmd_code, __u16 memsize, void *cda)
+{
+        ccw->cmd_code = cmd_code;
+        ccw->flags = CCW_FLAG_CC;
+        ccw->count = memsize;
+        ccw->cda = (__u32)(addr_t) cda;
+        return ccw + 1;
+}
+
+static inline struct ccw1 *
+tape_ccw_end(struct ccw1 *ccw, __u8 cmd_code, __u16 memsize, void *cda)
+{
+        ccw->cmd_code = cmd_code;
+        ccw->flags = 0;
+        ccw->count = memsize;
+        ccw->cda = (__u32)(addr_t) cda;
+        return ccw + 1;
+}
+
+static inline struct ccw1 *
+tape_ccw_cmd(struct ccw1 *ccw, __u8 cmd_code)
+{
+        ccw->cmd_code = cmd_code;
+        ccw->flags = 0;
+        ccw->count = 0;
+        ccw->cda = (__u32)(addr_t) &ccw->cmd_code;
+        return ccw + 1;
+}
+
+static inline struct ccw1 *
+tape_ccw_repeat(struct ccw1 *ccw, __u8 cmd_code, int count)
+{
+        while (count-- > 0) {
+                ccw->cmd_code = cmd_code;
+                ccw->flags = CCW_FLAG_CC;
+                ccw->count = 0;
+                ccw->cda = (__u32)(addr_t) &ccw->cmd_code;
+                ccw++;
+        }
+        return ccw;
+}
+
+static inline struct ccw1 *
+tape_ccw_cc_idal(struct ccw1 *ccw, __u8 cmd_code, struct idal_buffer *idal)
+{
+        ccw->cmd_code = cmd_code;
+        ccw->flags    = CCW_FLAG_CC;
+        idal_buffer_set_cda(idal, ccw);
+        return ccw++;
+}
+
+static inline struct ccw1 *
+tape_ccw_end_idal(struct ccw1 *ccw, __u8 cmd_code, struct idal_buffer *idal)
+{
+        ccw->cmd_code = cmd_code;
+        ccw->flags    = 0;
+        idal_buffer_set_cda(idal, ccw);
+        return ccw++;
+}
+
+/* Global vars */
+extern const char *tape_state_verbose[];
+extern const char *tape_op_verbose[];
+
+#endif /* for ifdef tape.h */