851 typedef struct hwif_s {  struct
852 	struct hwif_s *next;		/* for linked-list in ide_hwgroup_t */  argument
853 	struct hwif_s *mate;		/* other hwif from same PCI chip */  argument
854 	struct hwgroup_s *hwgroup;	/* actually (ide_hwgroup_t *) */
855 	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
856 	struct gendisk *gd;		/* gendisk structure */
858 	char name[6];			/* name of interface, eg. "ide0" */
861 	ide_ioreg_t	io_ports[IDE_NR_PORTS];
862 	sata_ioreg_t	sata_scr[SATA_NR_PORTS];
863 	sata_ioreg_t	sata_misc[SATA_NR_PORTS];
865 	hw_regs_t	hw;		/* Hardware info */
866 	ide_drive_t	drives[MAX_DRIVES];	/* drive info */
868 	u8 major;	/* our major number */
869 	u8 index;	/* 0 for ide0; 1 for ide1; ... */
870 	u8 channel;	/* for dual-port chips: 0=primary, 1=secondary */
871 	u8 straight8;	/* Alan's straight 8 check */
872 	u8 bus_state;	/* power state of the IDE bus */
874 	u8 atapi_dma;	/* host supports atapi_dma */
875 	u8 ultra_mask;
876 	u8 mwdma_mask;
877 	u8 swdma_mask;
879 	hwif_chipset_t chipset;	/* sub-module for tuning.. */
881 	struct pci_dev  *pci_dev;	/* for pci chipsets */
882 	struct ide_pci_device_s	*cds;	/* chipset device struct */
884 	ide_startstop_t	(*rw_disk)(ide_drive_t *, struct request *, unsigned long);
890 	int	(*identify)(ide_drive_t *);
892 	void	(*tuneproc)(ide_drive_t *, u8);
894 	int	(*speedproc)(ide_drive_t *, u8);
896 	void	(*selectproc)(ide_drive_t *);
898 	int	(*reset_poll)(ide_drive_t *);
900 	void	(*pre_reset)(ide_drive_t *);
902 	void	(*resetproc)(ide_drive_t *);
904 	void	(*intrproc)(ide_drive_t *);
906 	void	(*maskproc)(ide_drive_t *, int);
908 	int	(*quirkproc)(ide_drive_t *);
910 	int	(*busproc)(ide_drive_t *, int);
920 	void (*ata_input_data)(ide_drive_t *, void *, u32);
921 	void (*ata_output_data)(ide_drive_t *, void *, u32);
923 	void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
924 	void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
930 	int (*ide_dma_read)(ide_drive_t *drive);
931 	int (*ide_dma_write)(ide_drive_t *drive);
932 	int (*ide_dma_begin)(ide_drive_t *drive);
933 	int (*ide_dma_end)(ide_drive_t *drive);
934 	int (*ide_dma_check)(ide_drive_t *drive);
935 	int (*ide_dma_on)(ide_drive_t *drive);
936 	int (*ide_dma_off)(ide_drive_t *drive);
937 	int (*ide_dma_off_quietly)(ide_drive_t *drive);
938 	int (*ide_dma_test_irq)(ide_drive_t *drive);
939 	int (*ide_dma_host_on)(ide_drive_t *drive);
940 	int (*ide_dma_host_off)(ide_drive_t *drive);
941 	int (*ide_dma_bad_drive)(ide_drive_t *drive);
942 	int (*ide_dma_good_drive)(ide_drive_t *drive);
943 	int (*ide_dma_count)(ide_drive_t *drive);
944 	int (*ide_dma_verbose)(ide_drive_t *drive);
945 	int (*ide_dma_retune)(ide_drive_t *drive);
946 	int (*ide_dma_lostirq)(ide_drive_t *drive);
947 	int (*ide_dma_timeout)(ide_drive_t *drive);
950 	void (*OUTB)(u8 addr, unsigned long port);
951 	void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
952 	void (*OUTW)(u16 addr, unsigned long port);
953 	void (*OUTL)(u32 addr, unsigned long port);
954 	void (*OUTSW)(unsigned long port, void *addr, u32 count);
955 	void (*OUTSL)(unsigned long port, void *addr, u32 count);
957 	u8  (*INB)(unsigned long port);
958 	u16 (*INW)(unsigned long port);
959 	u32 (*INL)(unsigned long port);
960 	void (*INSW)(unsigned long port, void *addr, u32 count);
961 	void (*INSL)(unsigned long port, void *addr, u32 count);
964 	unsigned int	*dmatable_cpu;
966 	dma_addr_t	dmatable_dma;
968 	struct scatterlist *sg_table;
969 	int sg_nents;			/* Current number of entries in it */
970 	int sg_dma_direction;		/* dma transfer direction */
971 	int sg_dma_active;		/* is it in use */
973 	int		mmio;		/* hosts iomio (0), mmio (1) or custom (2) select */
974 	int		rqsize;		/* max sectors per request */
975 	int		addressing;	/* hosts addressing */
976 	int		irq;		/* our irq number */
977 	int		initializing;	/* set while initializing self */
979 	unsigned long	dma_master;	/* reference base addr dmabase */
980 	unsigned long	dma_base;	/* base addr for dma ports */
981 	unsigned long	dma_command;	/* dma command register */
982 	unsigned long	dma_vendor1;	/* dma vendor 1 register */
983 	unsigned long	dma_status;	/* dma status register */
984 	unsigned long	dma_vendor3;	/* dma vendor 3 register */
985 	unsigned long	dma_prdtable;	/* actual prd table address */
986 	unsigned long	dma_base2;	/* extended base addr for dma ports */
988 	unsigned	dma_extra;	/* extra addr for dma ports */
989 	unsigned long	config_data;	/* for use by chipset-specific code */
990 	unsigned long	select_data;	/* for use by chipset-specific code */
992 	unsigned long	last_time;	/* time when previous rq was done */
996 	unsigned	noprobe    : 1;	/* don't probe for this interface */
997 	unsigned	present    : 1;	/* this interface exists */
998 	unsigned	hold       : 1; /* this interface is always present */
999 	unsigned	serialized : 1;	/* serialized all channel operation */
1000 	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
1001 	unsigned	reset      : 1;	/* reset after probe */
1002 	unsigned	autodma    : 1;	/* auto-attempt using DMA at boot */
1003 	unsigned	udma_four  : 1;	/* 1=ATA-66 capable, 0=default */
1004 	unsigned	highmem    : 1;	/* can do full 32-bit dma */
1005 	unsigned	no_dsc     : 1;	/* 0 default, 1 dsc_overlap disabled */
1006 	unsigned	sata	   : 1; /* 0 PATA, 1 SATA */
1008 	void		*hwif_data;	/* extra hwif data */