406 lines
10 KiB
C
406 lines
10 KiB
C
#ifndef _BLK_H
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#define _BLK_H
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#include <linux/blkdev.h>
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#include <linux/locks.h>
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#include <linux/config.h>
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#include <linux/spinlock.h>
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/*
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* Spinlock for protecting the request queue which
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* is mucked around with in interrupts on potentially
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* multiple CPU's..
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*/
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extern spinlock_t io_request_lock;
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/*
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* Initialization functions.
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*/
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extern int isp16_init(void);
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extern int cdu31a_init(void);
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extern int acsi_init(void);
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extern int mcd_init(void);
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extern int mcdx_init(void);
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extern int sbpcd_init(void);
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extern int aztcd_init(void);
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extern int sony535_init(void);
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extern int gscd_init(void);
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extern int cm206_init(void);
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extern int optcd_init(void);
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extern int sjcd_init(void);
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extern int cdi_init(void);
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extern int hd_init(void);
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extern int ide_init(void);
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extern int xd_init(void);
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extern int mfm_init(void);
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extern int loop_init(void);
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extern int md_init(void);
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extern int ap_init(void);
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extern int ddv_init(void);
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extern int z2_init(void);
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extern int swim3_init(void);
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extern int swimiop_init(void);
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extern int amiga_floppy_init(void);
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extern int atari_floppy_init(void);
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extern int ez_init(void);
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extern int bpcd_init(void);
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extern int ps2esdi_init(void);
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extern int jsfd_init(void);
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extern int viodasd_init(void);
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extern int viocd_init(void);
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#if defined(CONFIG_ARCH_S390)
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extern int dasd_init(void);
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extern int xpram_init(void);
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extern int tapeblock_init(void);
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#endif /* CONFIG_ARCH_S390 */
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extern void set_device_ro(kdev_t dev,int flag);
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void add_blkdev_randomness(int major);
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extern int floppy_init(void);
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extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */
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extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */
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extern int rd_image_start; /* starting block # of image */
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#ifdef CONFIG_BLK_DEV_INITRD
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#define INITRD_MINOR 250 /* shouldn't collide with /dev/ram* too soon ... */
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extern unsigned long initrd_start,initrd_end;
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extern int initrd_below_start_ok; /* 1 if it is not an error if initrd_start < memory_start */
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void initrd_init(void);
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#endif
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/*
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* end_request() and friends. Must be called with the request queue spinlock
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* acquired. All functions called within end_request() _must_be_ atomic.
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*
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* Several drivers define their own end_request and call
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* end_that_request_first() and end_that_request_last()
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* for parts of the original function. This prevents
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* code duplication in drivers.
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*/
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static inline void blkdev_dequeue_request(struct request * req)
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{
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list_del(&req->queue);
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}
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int end_that_request_first(struct request *req, int uptodate, char *name);
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void end_that_request_last(struct request *req);
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#if defined(MAJOR_NR) || defined(IDE_DRIVER)
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#undef DEVICE_ON
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#undef DEVICE_OFF
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/*
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* Add entries as needed.
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*/
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#ifdef IDE_DRIVER
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#define DEVICE_NR(device) (MINOR(device) >> PARTN_BITS)
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#define DEVICE_NAME "ide"
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#elif (MAJOR_NR == RAMDISK_MAJOR)
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/* ram disk */
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#define DEVICE_NAME "ramdisk"
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#define DEVICE_NR(device) (MINOR(device))
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#define DEVICE_NO_RANDOM
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#elif (MAJOR_NR == Z2RAM_MAJOR)
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/* Zorro II Ram */
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#define DEVICE_NAME "Z2RAM"
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#define DEVICE_REQUEST do_z2_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == FLOPPY_MAJOR)
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static void floppy_off(unsigned int nr);
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#define DEVICE_NAME "floppy"
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#define DEVICE_INTR do_floppy
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#define DEVICE_REQUEST do_fd_request
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#define DEVICE_NR(device) ( (MINOR(device) & 3) | ((MINOR(device) & 0x80 ) >> 5 ))
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#define DEVICE_OFF(device) floppy_off(DEVICE_NR(device))
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#elif (MAJOR_NR == HD_MAJOR)
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/* Hard disk: timeout is 6 seconds. */
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#define DEVICE_NAME "hard disk"
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#define DEVICE_INTR do_hd
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#define TIMEOUT_VALUE (6*HZ)
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#define DEVICE_REQUEST do_hd_request
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#define DEVICE_NR(device) (MINOR(device)>>6)
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#elif (SCSI_DISK_MAJOR(MAJOR_NR))
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#define DEVICE_NAME "scsidisk"
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#define TIMEOUT_VALUE (2*HZ)
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#define DEVICE_NR(device) (((MAJOR(device) & SD_MAJOR_MASK) << (8 - 4)) + (MINOR(device) >> 4))
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/* Kludge to use the same number for both char and block major numbers */
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#elif (MAJOR_NR == MD_MAJOR) && defined(MD_DRIVER)
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#define DEVICE_NAME "Multiple devices driver"
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#define DEVICE_REQUEST do_md_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == SCSI_TAPE_MAJOR)
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#define DEVICE_NAME "scsitape"
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#define DEVICE_INTR do_st
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#define DEVICE_NR(device) (MINOR(device) & 0x7f)
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#elif (MAJOR_NR == OSST_MAJOR)
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#define DEVICE_NAME "onstream"
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#define DEVICE_INTR do_osst
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#define DEVICE_NR(device) (MINOR(device) & 0x7f)
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#define DEVICE_ON(device)
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#define DEVICE_OFF(device)
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#elif (MAJOR_NR == SCSI_CDROM_MAJOR)
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#define DEVICE_NAME "CD-ROM"
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == XT_DISK_MAJOR)
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#define DEVICE_NAME "xt disk"
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#define DEVICE_REQUEST do_xd_request
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#define DEVICE_NR(device) (MINOR(device) >> 6)
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#elif (MAJOR_NR == PS2ESDI_MAJOR)
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#define DEVICE_NAME "PS/2 ESDI"
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#define DEVICE_REQUEST do_ps2esdi_request
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#define DEVICE_NR(device) (MINOR(device) >> 6)
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#elif (MAJOR_NR == CDU31A_CDROM_MAJOR)
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#define DEVICE_NAME "CDU31A"
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#define DEVICE_REQUEST do_cdu31a_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == ACSI_MAJOR) && (defined(CONFIG_ATARI_ACSI) || defined(CONFIG_ATARI_ACSI_MODULE))
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#define DEVICE_NAME "ACSI"
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#define DEVICE_INTR do_acsi
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#define DEVICE_REQUEST do_acsi_request
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#define DEVICE_NR(device) (MINOR(device) >> 4)
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#elif (MAJOR_NR == MITSUMI_CDROM_MAJOR)
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#define DEVICE_NAME "Mitsumi CD-ROM"
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/* #define DEVICE_INTR do_mcd */
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#define DEVICE_REQUEST do_mcd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MITSUMI_X_CDROM_MAJOR)
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#define DEVICE_NAME "Mitsumi CD-ROM"
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/* #define DEVICE_INTR do_mcdx */
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#define DEVICE_REQUEST do_mcdx_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MATSUSHITA_CDROM_MAJOR)
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#define DEVICE_NAME "Matsushita CD-ROM controller #1"
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#define DEVICE_REQUEST do_sbpcd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MATSUSHITA_CDROM2_MAJOR)
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#define DEVICE_NAME "Matsushita CD-ROM controller #2"
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#define DEVICE_REQUEST do_sbpcd2_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MATSUSHITA_CDROM3_MAJOR)
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#define DEVICE_NAME "Matsushita CD-ROM controller #3"
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#define DEVICE_REQUEST do_sbpcd3_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MATSUSHITA_CDROM4_MAJOR)
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#define DEVICE_NAME "Matsushita CD-ROM controller #4"
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#define DEVICE_REQUEST do_sbpcd4_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == AZTECH_CDROM_MAJOR)
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#define DEVICE_NAME "Aztech CD-ROM"
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#define DEVICE_REQUEST do_aztcd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == CDU535_CDROM_MAJOR)
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#define DEVICE_NAME "SONY-CDU535"
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#define DEVICE_INTR do_cdu535
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#define DEVICE_REQUEST do_cdu535_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == GOLDSTAR_CDROM_MAJOR)
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#define DEVICE_NAME "Goldstar R420"
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#define DEVICE_REQUEST do_gscd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == CM206_CDROM_MAJOR)
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#define DEVICE_NAME "Philips/LMS CD-ROM cm206"
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#define DEVICE_REQUEST do_cm206_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == OPTICS_CDROM_MAJOR)
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#define DEVICE_NAME "DOLPHIN 8000AT CD-ROM"
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#define DEVICE_REQUEST do_optcd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == SANYO_CDROM_MAJOR)
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#define DEVICE_NAME "Sanyo H94A CD-ROM"
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#define DEVICE_REQUEST do_sjcd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == APBLOCK_MAJOR)
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#define DEVICE_NAME "apblock"
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#define DEVICE_REQUEST ap_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == DDV_MAJOR)
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#define DEVICE_NAME "ddv"
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#define DEVICE_REQUEST ddv_request
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#define DEVICE_NR(device) (MINOR(device)>>PARTN_BITS)
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#elif (MAJOR_NR == MFM_ACORN_MAJOR)
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#define DEVICE_NAME "mfm disk"
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#define DEVICE_INTR do_mfm
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#define DEVICE_REQUEST do_mfm_request
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#define DEVICE_NR(device) (MINOR(device) >> 6)
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#elif (MAJOR_NR == NBD_MAJOR)
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#define DEVICE_NAME "nbd"
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#define DEVICE_REQUEST do_nbd_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == MDISK_MAJOR)
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#define DEVICE_NAME "mdisk"
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#define DEVICE_REQUEST mdisk_request
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#define DEVICE_NR(device) (MINOR(device))
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#elif (MAJOR_NR == DASD_MAJOR)
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#define DEVICE_NAME "dasd"
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#define DEVICE_REQUEST do_dasd_request
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#define DEVICE_NR(device) (MINOR(device) >> PARTN_BITS)
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#elif (MAJOR_NR == I2O_MAJOR)
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#define DEVICE_NAME "I2O block"
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#define DEVICE_REQUEST i2ob_request
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#define DEVICE_NR(device) (MINOR(device)>>4)
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#elif (MAJOR_NR == COMPAQ_SMART2_MAJOR)
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#define DEVICE_NAME "ida"
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#define TIMEOUT_VALUE (25*HZ)
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#define DEVICE_REQUEST do_ida_request
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#define DEVICE_NR(device) (MINOR(device) >> 4)
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#endif /* MAJOR_NR == whatever */
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/* provide DEVICE_xxx defaults, if not explicitly defined
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* above in the MAJOR_NR==xxx if-elif tree */
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#ifndef DEVICE_ON
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#define DEVICE_ON(device) do {} while (0)
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#endif
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#ifndef DEVICE_OFF
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#define DEVICE_OFF(device) do {} while (0)
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#endif
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#if (MAJOR_NR != SCSI_TAPE_MAJOR) && (MAJOR_NR != OSST_MAJOR)
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#if !defined(IDE_DRIVER)
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#ifndef CURRENT
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#define CURRENT blkdev_entry_next_request(&blk_dev[MAJOR_NR].request_queue.queue_head)
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#endif
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#ifndef QUEUE_EMPTY
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#define QUEUE_EMPTY list_empty(&blk_dev[MAJOR_NR].request_queue.queue_head)
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#endif
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#ifndef DEVICE_NAME
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#define DEVICE_NAME "unknown"
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#endif
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#define CURRENT_DEV DEVICE_NR(CURRENT->rq_dev)
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#ifdef DEVICE_INTR
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static void (*DEVICE_INTR)(void) = NULL;
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#endif
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#define SET_INTR(x) (DEVICE_INTR = (x))
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#ifdef DEVICE_REQUEST
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static void (DEVICE_REQUEST)(request_queue_t *);
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#endif
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#ifdef DEVICE_INTR
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#define CLEAR_INTR SET_INTR(NULL)
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#else
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#define CLEAR_INTR
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#endif
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#define INIT_REQUEST \
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if (QUEUE_EMPTY) {\
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CLEAR_INTR; \
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return; \
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} \
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if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) \
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panic(DEVICE_NAME ": request list destroyed"); \
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if (CURRENT->bh) { \
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if (!buffer_locked(CURRENT->bh)) \
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panic(DEVICE_NAME ": block not locked"); \
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}
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#endif /* !defined(IDE_DRIVER) */
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#ifndef LOCAL_END_REQUEST /* If we have our own end_request, we do not want to include this mess */
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#if ! SCSI_BLK_MAJOR(MAJOR_NR) && (MAJOR_NR != COMPAQ_SMART2_MAJOR)
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static inline void end_request(int uptodate) {
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struct request *req = CURRENT;
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if (end_that_request_first(req, uptodate, DEVICE_NAME))
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return;
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#ifndef DEVICE_NO_RANDOM
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add_blkdev_randomness(MAJOR(req->rq_dev));
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#endif
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DEVICE_OFF(req->rq_dev);
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blkdev_dequeue_request(req);
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end_that_request_last(req);
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}
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#endif /* ! SCSI_BLK_MAJOR(MAJOR_NR) */
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#endif /* LOCAL_END_REQUEST */
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#endif /* (MAJOR_NR != SCSI_TAPE_MAJOR) */
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#endif /* defined(MAJOR_NR) || defined(IDE_DRIVER) */
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#endif /* _BLK_H */
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