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1275 |
phoenix |
/***********************************************************************
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* drivers/s390/char/tapedefs.h
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* tape device driver for S/390 and zSeries tapes.
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*
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* S390 and zSeries version
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* Copyright (C) 2001 IBM Corporation
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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* Tuan Ngo-Anh <ngoanh@de.ibm.com>
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*
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*
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***********************************************************************
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*/
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/* Kernel Version Compatibility section */
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#include <linux/version.h>
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#include <linux/blkdev.h>
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#include <linux/blk.h>
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#include <asm/irq.h>
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,2,17))
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#define TAPE_DEBUG // use s390 debug feature
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#else
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#undef TAPE_DEBUG // debug feature not supported by our 2.2.16 code
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static inline void set_normalized_cda ( ccw1_t * cp, unsigned long address ) {
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cp -> cda = address;
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}
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static inline void clear_normalized_cda ( ccw1_t * ccw ) {
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ccw -> cda = 0;
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}
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#define BUG() PRINT_FATAL("tape390: CRITICAL INTERNAL ERROR OCCURED. REPORT THIS BACK TO LINUX390@DE.IBM.COM\n")
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#endif
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#define CONFIG_S390_TAPE_DYNAMIC // allow devices to be attached or detached on the fly
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#define TAPEBLOCK_RETRIES 20 // number of retries, when a block-dev request fails.
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,3,98))
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#define INIT_BLK_DEV(d_major,d_request_fn,d_queue_fn,d_current) \
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do { \
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blk_dev[d_major].queue = d_queue_fn; \
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} while(0)
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static inline struct request *
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tape_next_request( request_queue_t *queue )
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{
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return blkdev_entry_next_request(&queue->queue_head);
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}
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static inline void
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tape_dequeue_request( request_queue_t * q, struct request *req )
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{
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blkdev_dequeue_request (req);
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}
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#else
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#define s390_dev_info_t dev_info_t
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typedef struct request *request_queue_t;
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#ifndef init_waitqueue_head
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#define init_waitqueue_head(x) do { *x = NULL; } while(0)
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#endif
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#define blk_init_queue(x,y) do {} while(0)
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#define blk_queue_headactive(x,y) do {} while(0)
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#define INIT_BLK_DEV(d_major,d_request_fn,d_queue_fn,d_current) \
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do { \
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blk_dev[d_major].request_fn = d_request_fn; \
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blk_dev[d_major].queue = d_queue_fn; \
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blk_dev[d_major].current_request = d_current; \
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} while(0)
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static inline struct request *
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tape_next_request( request_queue_t *queue )
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{
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return *queue;
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}
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static inline void
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tape_dequeue_request( request_queue_t * q, struct request *req )
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{
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*q = req->next;
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req->next = NULL;
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}
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#endif
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