patch-2.4.2 linux/drivers/s390/char/tape.h

• Lines: 186
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/drivers/s390/char/tape.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/drivers/s390/char/tape.h linux/drivers/s390/char/tape.h
@@ -0,0 +1,185 @@
+
+/***************************************************************************
+ *
+ *  drivers/s390/char/tape.h
+ *    tape device driver for 3480/3490E tapes.
+ *
+ *  S390 version
+ *    Copyright (C) 2000 IBM Corporation
+ *    Author(s): Tuan Ngo-Anh <ngoanh@de.ibm.com>
+ *               Carsten Otte <cotte@de.ibm.com>
+ *
+ *  UNDER CONSTRUCTION: Work in progress...:-)
+ ****************************************************************************
+ */
+
+#ifndef _TAPE_H
+
+#define _TAPE_H
+#include <linux/config.h>
+#include <linux/blkdev.h>
+
+#define  MAX_TAPES                     7        /* Max tapes supported is 7*/
+#define TAPE_MAGIC 0xE3C1D7C5       /* is ebcdic-"TAPE" */
+
+typedef enum {
+    TS_UNUSED=0, TS_IDLE, TS_DONE, TS_FAILED,
+    TS_BLOCK_INIT,
+    TS_BSB_INIT,
+    TS_BSF_INIT,
+    TS_DSE_INIT,
+    TS_EGA_INIT,
+    TS_FSB_INIT,
+    TS_FSF_INIT,
+    TS_LDI_INIT,
+    TS_LBL_INIT,
+    TS_MSE_INIT,
+    TS_NOP_INIT,
+    TS_RBA_INIT,
+    TS_RBI_INIT,
+    TS_RBU_INIT,
+    TS_RBL_INIT,
+    TS_RDC_INIT,
+    TS_RFO_INIT,
+    TS_RSD_INIT,
+    TS_REW_INIT,
+    TS_REW_RELEASE_INIT,
+    TS_RUN_INIT,
+    TS_SEN_INIT,
+    TS_SID_INIT,
+    TS_SNP_INIT,
+    TS_SPG_INIT,
+    TS_SWI_INIT,
+    TS_SMR_INIT,
+    TS_SYN_INIT,
+    TS_TIO_INIT,
+    TS_UNA_INIT,
+    TS_WRI_INIT,
+    TS_WTM_INIT,
+    TS_NOT_OPER,
+    TS_SIZE } tape_stat;
+
+struct _tape_info_t; //Forward declaration
+
+typedef enum {
+    TE_START=0, TE_DONE, TE_FAILED, TE_ERROR, TE_OTHER,
+    TE_SIZE } tape_events;
+
+typedef void (*tape_event_handler_t) (struct _tape_info_t*);
+typedef ccw_req_t* (*tape_ccwgen_t)(struct _tape_info_t* tape,int count);
+typedef ccw_req_t* (*tape_reqgen_t)(struct request* req,struct _tape_info_t* tape,int tapeblock_major);
+typedef ccw_req_t* (*tape_rwblock_t)(const char* data,size_t count,struct _tape_info_t* tape);
+typedef void (*tape_freeblock_t)(ccw_req_t* cqr,struct _tape_info_t* tape);
+typedef void (*tape_setup_assist_t) (struct _tape_info_t*);
+typedef tape_event_handler_t tape_event_table_t[TS_SIZE][TE_SIZE];
+typedef struct _tape_discipline_t {
+    unsigned int cu_type;
+    tape_setup_assist_t setup_assist;
+    tape_reqgen_t bread;
+    tape_freeblock_t free_bread;
+    tape_rwblock_t write_block;
+    tape_freeblock_t free_write_block;
+    tape_rwblock_t read_block;
+    tape_freeblock_t free_read_block;
+    tape_ccwgen_t mtfsf;
+    tape_ccwgen_t mtbsf;
+    tape_ccwgen_t mtfsr;
+    tape_ccwgen_t mtbsr;
+    tape_ccwgen_t mtweof;
+    tape_ccwgen_t mtrew;
+    tape_ccwgen_t mtoffl;
+    tape_ccwgen_t mtnop;
+    tape_ccwgen_t mtbsfm;
+    tape_ccwgen_t mtfsfm;
+    tape_ccwgen_t mteom;
+    tape_ccwgen_t mterase;
+    tape_ccwgen_t mtsetdensity;
+    tape_ccwgen_t mtseek;
+    tape_ccwgen_t mttell;
+    tape_ccwgen_t mtsetdrvbuffer;
+    tape_ccwgen_t mtlock;
+    tape_ccwgen_t mtunlock;
+    tape_ccwgen_t mtload;
+    tape_ccwgen_t mtunload;
+    tape_ccwgen_t mtcompression;
+    tape_ccwgen_t mtsetpart;
+    tape_ccwgen_t mtmkpart;
+    tape_ccwgen_t mtiocget;
+    tape_ccwgen_t mtiocpos;
+    int (*discipline_ioctl_overload)(struct inode *,struct file*, unsigned int,unsigned long);
+    tape_event_table_t* event_table;
+    tape_event_handler_t default_handler;
+    struct _tape_info_t* tape; /* pointer for backreference */
+    void* next;
+} tape_discipline_t  __attribute__ ((aligned(8)));
+
+typedef struct _tape_frontend_t {
+    tape_setup_assist_t device_setup;
+    void* next;
+} tape_frontend_t  __attribute__ ((aligned(8)));
+
+
+typedef struct _tape_info_t {
+    wait_queue_head_t wq;
+    s390_dev_info_t devinfo;             /* device info from Common I/O */
+    int     wanna_wakeup;
+    int     rew_minor;                  /* minor number for the rewinding tape */
+    int     nor_minor;                  /* minor number for the nonrewinding tape */
+    int     blk_minor;                  /* minor number for the block device */
+    devstat_t devstat;	           /* contains irq, devno, status */
+    size_t  block_size;             /* block size of tape        */
+    int    drive_type;              /* Code indicating type of drive */
+    struct file *rew_filp;	           /* backpointer to file structure */
+    struct file *nor_filp;
+    struct file *blk_filp;
+    int tape_state;  /* State of the device. See tape_stat */
+    int rc;          /* Return code. */
+    tape_discipline_t* discipline;
+    request_queue_t request_queue;
+    struct request* current_request;
+    int blk_retries;
+    long position;
+    ccw_req_t* cqr;
+    atomic_t bh_scheduled;
+    struct tq_struct bh_tq;
+    void* discdata;
+    void* kernbuf;
+    void* userbuf;
+    void*  next;
+} tape_info_t  __attribute__ ((aligned(8)));
+
+/* tape initialisation functions */
+int tape_init(void);
+int tape_setup (tape_info_t * ti, int irq, int minor);
+
+/* functoins for alloc'ing ccw stuff */
+inline  ccw_req_t * tape_alloc_ccw_req (tape_info_t* tape, int cplength, int datasize);
+void tape_free_request (ccw_req_t * request);
+
+/* a function for dumping device sense info */
+void tape_dump_sense (devstat_t * stat);
+
+#ifdef CONFIG_S390_TAPE_DYNAMIC
+/* functions for dyn. dev. attach/detach */
+int tape_oper_handler ( int irq, struct _devreg *dreg);
+#endif
+
+/* functions for handling the status of a device */
+inline void tapestate_set (tape_info_t * tape, int newstate);
+inline int tapestate_get (tape_info_t * tape);
+extern char* state_verbose[TS_SIZE];
+extern char* event_verbose[TE_SIZE];
+
+/****************************************************************************/
+
+/* Some linked lists for storing plugins and devices */
+extern tape_info_t *first_tape_info;
+extern tape_discipline_t *first_discipline;
+extern tape_frontend_t *first_frontend;
+
+/* The debug area */
+#ifdef TAPE_DEBUG
+extern debug_info_t *tape_debug_area;
+#endif
+
+#endif /* for ifdef tape.h */