patch-2.2.17 linux/include/asm-s390/dasd.h

• Lines: 254
• Date: Mon Sep 4 18:39:28 2000
• Orig file: v2.2.16/include/asm-s390/dasd.h
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --recursive --new-file v2.2.16/include/asm-s390/dasd.h linux/include/asm-s390/dasd.h
@@ -0,0 +1,253 @@
+
+#ifndef DASD_H
+#define DASD_H
+
+/* First of all the external stuff */
+#include <linux/ioctl.h>
+#include <linux/major.h>
+#include <linux/wait.h>
+#include <asm/ccwcache.h>
+/* #include <linux/blkdev.h> */
+#include <linux/genhd.h>
+#include <linux/hdreg.h>
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,3,98))
+#include <linux/devfs_fs_kernel.h>
+#endif /* LINUX_IS_24 */
+
+#define IOCTL_LETTER 'D'
+/* Format the volume or an extent */
+#define BIODASDFORMAT  _IOW(IOCTL_LETTER,0,format_data_t) 
+/* Disable the volume (for Linux) */
+#define BIODASDDISABLE _IO(IOCTL_LETTER,1) 
+/* Enable the volume (for Linux) */
+#define BIODASDENABLE  _IO(IOCTL_LETTER,2) 
+/* Stuff for reading and writing the Label-Area to/from user space */
+#define BIODASDGTVLBL  _IOR(IOCTL_LETTER,3,dasd_volume_label_t)
+#define BIODASDSTVLBL  _IOW(IOCTL_LETTER,4,dasd_volume_label_t)
+#define BIODASDRWTB    _IOWR(IOCTL_LETTER,5,int)
+#define BIODASDRSID    _IOR(IOCTL_LETTER,6,senseid_t)
+#define BIODASDRLB     _IOR(IOCTL_LETTER,7,int)
+#define BLKGETBSZ      _IOR(IOCTL_LETTER,8,int)
+#define BIODASDEXCP    _IOWR(IOCTL_LETTER,9,ccw_req_t)
+
+#define DASD_NAME "dasd"
+#define DASD_PARTN_BITS 2
+#define PARTN_BITS DASD_PARTN_BITS
+#define DASD_PER_MAJOR ( 1U<<(MINORBITS-DASD_PARTN_BITS))
+
+/* 
+ * struct format_data_t
+ * represents all data necessary to format a dasd
+ */
+typedef struct format_data_t {
+	int start_unit; /* from track */
+	int stop_unit;  /* to track */
+	int blksize;    /* sectorsize */
+        int intensity;  /* 0: normal, 1:record zero, 3:home address */
+} __attribute__ ((packed)) format_data_t;
+
+#define DASD_FORMAT_DEFAULT_START_UNIT 0
+#define DASD_FORMAT_DEFAULT_STOP_UNIT -1
+#define DASD_FORMAT_DEFAULT_BLOCKSIZE -1
+#define DASD_FORMAT_DEFAULT_INTENSITY -1
+
+#ifdef __KERNEL__
+
+typedef enum {
+	dasd_era_fatal = -1,	/* no chance to recover              */
+	dasd_era_none = 0,	/* don't recover, everything alright */
+	dasd_era_msg = 1,	/* don't recover, just report...     */
+	dasd_era_recover = 2	/* recovery action recommended       */
+} dasd_era_t;
+
+/* 
+ * struct dasd_sizes_t
+ * represents all data needed to access dasd with properly set up sectors
+ */
+typedef
+struct dasd_sizes_t {
+	unsigned int blocks;
+	unsigned int bp_block;
+	unsigned int s2b_shift;
+} __attribute__ ((packed)) dasd_sizes_t;
+
+/* 
+ * struct dasd_chanq_t 
+ * represents a queue of channel programs related to a single device
+ */
+typedef
+struct dasd_chanq_t {
+	ccw_req_t *head;
+	ccw_req_t *tail;
+	struct dasd_chanq_t *next_q;	/* pointer to next queue */
+	int queued_requests;
+	atomic_t flags;
+	atomic_t dirty_requests;
+} __attribute__ ((packed)) dasd_chanq_t;
+
+#define DASD_CHANQ_BUSY 0x01
+#define DASD_CHANQ_ACTIVE 0x02
+#define DASD_REQUEST_Q_BROKEN 0x04
+
+struct dasd_device_t;
+
+typedef ccw_req_t *(*dasd_erp_action_fn_t) (ccw_req_t * cqr);
+typedef int (*dasd_erp_postaction_fn_t) (ccw_req_t * cqr, int);
+
+typedef int (*dasd_ck_id_fn_t) (dev_info_t *);
+typedef int (*dasd_ck_characteristics_fn_t) (struct dasd_device_t *);
+typedef int (*dasd_fill_geometry_fn_t) (struct dasd_device_t *, struct hd_geometry *);
+typedef ccw_req_t *(*dasd_format_fn_t) (struct dasd_device_t *, struct format_data_t *);
+typedef ccw_req_t *(*dasd_init_analysis_fn_t) (struct dasd_device_t *);
+typedef int (*dasd_do_analysis_fn_t) (struct dasd_device_t *);
+typedef int (*dasd_io_starter_fn_t) (ccw_req_t *);
+typedef void (*dasd_int_handler_fn_t)(int irq, void *, struct pt_regs *);
+typedef dasd_era_t (*dasd_error_examine_fn_t) (ccw_req_t *, devstat_t * stat);
+typedef dasd_erp_action_fn_t (*dasd_error_analyse_fn_t) (ccw_req_t *);
+typedef dasd_erp_postaction_fn_t (*dasd_erp_analyse_fn_t) (ccw_req_t *);
+typedef ccw_req_t *(*dasd_cp_builder_fn_t)(struct dasd_device_t *,struct request *);
+typedef char *(*dasd_dump_sense_fn_t)(struct dasd_device_t *,ccw_req_t *);
+
+typedef struct dasd_discipline_t {
+	char ebcname[8]; /* a name used for tagging and printks */
+        char name[8];		/* a name used for tagging and printks */
+
+	struct dasd_discipline_t *next;	/* used for list of disciplines */
+
+	dasd_ck_id_fn_t id_check;	/* to check sense data */
+	dasd_ck_characteristics_fn_t check_characteristics;	/* to check the characteristics */
+	dasd_init_analysis_fn_t init_analysis;	/* to start the analysis of the volume */
+	dasd_do_analysis_fn_t do_analysis;	/* to complete the analysis of the volume */
+	dasd_fill_geometry_fn_t fill_geometry;	/* to set up hd_geometry */
+	dasd_io_starter_fn_t start_IO;
+        dasd_format_fn_t format_device;		/* to format the device */
+	dasd_error_examine_fn_t examine_error;
+	dasd_error_analyse_fn_t erp_action;
+	dasd_erp_analyse_fn_t erp_postaction;
+        dasd_cp_builder_fn_t build_cp_from_req;
+        dasd_dump_sense_fn_t dump_sense;
+        dasd_int_handler_fn_t int_handler;
+} __attribute__   ((packed)) dasd_discipline_t;
+
+typedef struct major_info_t {
+	struct major_info_t *next;
+	struct dasd_device_t **dasd_device;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,3,98))
+	void (*request_fn) (request_queue_t *);
+#else
+	void (*request_fn) (void);
+#endif /* LINUX_IS_24 */
+	int read_ahead;
+	int *blk_size;
+	int *hardsect_size;
+	int *blksize_size;
+	int *max_sectors;
+	struct gendisk gendisk;
+} __attribute__ ((packed)) major_info_t;
+
+typedef struct dasd_device_t {
+	dev_info_t devinfo;
+	dasd_discipline_t *discipline;
+	atomic_t level;
+        int open_count;
+        kdev_t kdev;
+        major_info_t *major_info;
+	struct dasd_chanq_t queue;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,3,98))
+        wait_queue_head_t wait_q;
+        request_queue_t *request_queue;
+#else
+        struct wait_queue wait;
+        struct wait_queue *wait_q;
+#endif /* LINUX_IS_24 */
+        dasd_sizes_t sizes;
+	devstat_t dev_status;
+	char *characteristics;
+        char name[16]; /* The name of the device in /dev */
+	char *private;	/* to be used by the discipline internally */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,3,98))
+        devfs_handle_t devfs_entry;
+#endif /* LINUX_IS_24 */
+}  dasd_device_t;
+
+/* dasd_device_t.level can be: */
+#define DASD_DEVICE_LEVEL_UNKNOWN 0x00
+#define DASD_DEVICE_LEVEL_RECOGNIZED 0x01
+#define DASD_DEVICE_LEVEL_ANALYSIS_PENDING 0x02
+#define DASD_DEVICE_LEVEL_ANALYSIS_PREPARED 0x04
+#define DASD_DEVICE_LEVEL_ANALYSED 0x08
+#define DASD_DEVICE_LEVEL_PARTITIONED 0x10
+
+typedef
+union {
+	char bytes[512];
+	struct {
+		/* 80 Bytes of Label data */
+		char identifier[4];	/* e.g. "LNX1", "VOL1" or "CMS1" */
+		char label[6];	/* Given by user */
+		char security;
+		char vtoc[5];	/* Null in "LNX1"-labelled partitions */
+		char reserved0[5];
+		long ci_size;
+		long blk_per_ci;
+		long lab_per_ci;
+		char reserved1[4];
+		char owner[0xe];
+		char no_part;
+		char reserved2[0x1c];
+		/* 16 Byte of some information on the dasd */
+		short blocksize;
+		char nopart;
+		char unused;
+		long unused2[3];
+		/* 7*10 = 70 Bytes of partition data */
+		struct {
+			char type;
+			long start;
+			long size;
+			char unused;
+		} part[7];
+	} __attribute__ ((packed)) label;
+} dasd_volume_label_t;
+
+typedef union {
+	struct {
+		unsigned long no;
+		unsigned int ct;
+	} __attribute__ ((packed)) input;
+	struct {
+		unsigned long noct;
+	} __attribute__ ((packed)) output;
+} __attribute__ ((packed)) dasd_xlate_t;
+
+int dasd_init (void);
+/* int dasd_device_name (char *, int, int, struct gendisk *); */
+void dasd_discipline_enq (dasd_discipline_t *);
+int dasd_discipline_deq(dasd_discipline_t *);
+int dasd_start_IO (ccw_req_t *);
+void dasd_int_handler (int , void *, struct pt_regs *);
+
+#endif /* __KERNEL__ */
+
+#endif				/* DASD_H */
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4 
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: nil
+ * tab-width: 8
+ * End:
+ */