aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/char/tape.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/char/tape.h')
-rw-r--r--drivers/s390/char/tape.h94
1 files changed, 37 insertions, 57 deletions
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index 1f4c89967be..ea664dd4f56 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -1,9 +1,8 @@
/*
- * drivers/s390/char/tape.h
* tape device driver for 3480/3490E/3590 tapes.
*
* S390 and zSeries version
- * Copyright (C) 2001,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright IBM Corp. 2001, 2009
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -16,7 +15,6 @@
#include <asm/ccwdev.h>
#include <asm/debug.h>
#include <asm/idals.h>
-#include <linux/blkdev.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mtio.h>
@@ -99,7 +97,12 @@ enum tape_op {
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 */
+ TO_CRYPT_ON, /* Enable encrpytion */
+ TO_CRYPT_OFF, /* Disable encrpytion */
+ TO_KEKL_SET, /* Set KEK label */
+ TO_KEKL_QUERY, /* Query KEK label */
+ TO_RDC, /* Read device characteristics */
+ TO_SIZE, /* #entries in tape_op_t */
};
/* Forward declaration */
@@ -112,6 +115,7 @@ enum tape_request_status {
TAPE_REQUEST_IN_IO, /* request is currently in IO */
TAPE_REQUEST_DONE, /* request is completed. */
TAPE_REQUEST_CANCEL, /* request should be canceled. */
+ TAPE_REQUEST_LONG_BUSY, /* request has to be restarted after long busy */
};
/* Tape CCW request */
@@ -148,12 +152,6 @@ struct tape_discipline {
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 */
@@ -164,10 +162,11 @@ struct tape_discipline {
* 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 */
+#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 */
+#define TAPE_IO_LONG_BUSY 4 /* delay the running request */
/* Char Frontend Data */
struct tape_char_data {
@@ -175,25 +174,6 @@ struct tape_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 */
@@ -204,6 +184,9 @@ struct tape_device {
struct tape_class_device * nt;
struct tape_class_device * rt;
+ /* Device mutex to serialize tape commands. */
+ struct mutex mutex;
+
/* Device discipline information. */
struct tape_discipline * discipline;
void * discdata;
@@ -223,6 +206,9 @@ struct tape_device {
/* Request queue. */
struct list_head req_queue;
+ /* Request wait queue. */
+ wait_queue_head_t wait_queue;
+
/* Each tape device has (currently) two minor numbers. */
int first_minor;
@@ -234,13 +220,13 @@ struct tape_device {
/* 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
/* Function to start or stop the next request later. */
- struct work_struct tape_dnr;
+ struct delayed_work tape_dnr;
+
+ /* Timer for long busy */
+ struct timer_list lb_timeout;
+
};
/* Externals from tape_core.c */
@@ -262,6 +248,14 @@ tape_do_io_free(struct tape_device *device, struct tape_request *request)
return rc;
}
+static inline void
+tape_do_io_async_free(struct tape_device *device, struct tape_request *request)
+{
+ request->callback = (void *) tape_free_request;
+ request->callback_data = NULL;
+ tape_do_io_async(device, request);
+}
+
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 *);
@@ -270,15 +264,16 @@ 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);
+extern int tape_generic_offline(struct ccw_device *);
+extern int tape_generic_pm_suspend(struct ccw_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 *);
+extern struct tape_device *tape_find_device(int devindex);
+extern struct tape_device *tape_get_device(struct tape_device *);
+extern void tape_put_device(struct tape_device *);
/* Externals from tape_char.c */
extern int tapechar_init(void);
@@ -286,19 +281,6 @@ 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);
@@ -309,8 +291,6 @@ 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 *);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 10:34:02 +0000