patch-2.4.22 linux-2.4.22/include/asm-s390x/dasd.h

• Lines: 231
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/include/asm-s390x/dasd.h
• Orig date: 2001-10-11 09:43:38.000000000 -0700

diff -urN linux-2.4.21/include/asm-s390x/dasd.h linux-2.4.22/include/asm-s390x/dasd.h
@@ -8,8 +8,15 @@
  * any future changes wrt the API will result in a change of the APIVERSION reported
  * to userspace by the DASDAPIVER-ioctl
  *
+ * $Revision: 1.51 $
+ *
  * History of changes (starts July 2000)
  * 05/04/01 created by moving the kernel interface to drivers/s390/block/dasd_int.h
+ * 12/06/01 DASD_API_VERSION 2 - binary compatible to 0 (new BIODASDINFO2)
+ * 01/23/02 DASD_API_VERSION 3 - added BIODASDPSRD IOCTL
+ * 02/15/02 DASD_API_VERSION 4 - added BIODASDSATTR IOCTL
+ * 06/07/02 DASD_API_VERSION 5 - added 'boxed DASD' support
+ *         
  */
 
 #ifndef DASD_H
@@ -18,11 +25,126 @@
 
 #define DASD_IOCTL_LETTER 'D'
 
-#if (DASD_API_VERSION == 0)
+#define DASD_API_VERSION 5
+
+/* 
+ * struct dasd_information2_t
+ * represents any data about the device, which is visible to userspace.
+ *  including foramt and featueres.
+ */
+typedef struct dasd_information2_t {
+        unsigned int devno;         /* S/390 devno */
+        unsigned int real_devno;    /* for aliases */
+        unsigned int schid;         /* S/390 subchannel identifier */
+        unsigned int cu_type  : 16; /* from SenseID */
+        unsigned int cu_model :  8; /* from SenseID */
+        unsigned int dev_type : 16; /* from SenseID */
+        unsigned int dev_model : 8; /* from SenseID */
+        unsigned int open_count; 
+        unsigned int req_queue_len; 
+        unsigned int chanq_len;     /* length of chanq */
+        char type[4];               /* from discipline.name, 'none' for unknown */
+        unsigned int status;        /* current device level */
+        unsigned int label_block;   /* where to find the VOLSER */
+        unsigned int FBA_layout;    /* fixed block size (like AIXVOL) */
+        unsigned int characteristics_size;
+        unsigned int confdata_size;
+        char characteristics[64];   /* from read_device_characteristics */
+        char configuration_data[256]; /* from read_configuration_data */
+        unsigned int format;          /* format info like formatted/cdl/ldl/... */
+        unsigned int features;        /* dasd features like 'ro',...            */
+        unsigned int reserved0;       /* reserved for further use ,...          */
+        unsigned int reserved1;       /* reserved for further use ,...          */
+        unsigned int reserved2;       /* reserved for further use ,...          */
+        unsigned int reserved3;       /* reserved for further use ,...          */
+        unsigned int reserved4;       /* reserved for further use ,...          */
+        unsigned int reserved5;       /* reserved for further use ,...          */
+        unsigned int reserved6;       /* reserved for further use ,...          */
+        unsigned int reserved7;       /* reserved for further use ,...          */
+} dasd_information2_t;
+
+/*
+ * values to be used for dasd_information_t.format
+ * 0x00: NOT formatted
+ * 0x01: Linux disc layout
+ * 0x02: Common disc layout
+ */
+#define DASD_FORMAT_NONE 0
+#define DASD_FORMAT_LDL  1
+#define DASD_FORMAT_CDL  2
+/*
+ * values to be used for dasd_information_t.features
+ * 0x00: default features
+ * 0x01: readonly (ro)
+ */
+#define DASD_FEATURE_DEFAULT  0
+#define DASD_FEATURE_READONLY 1
 
 #define DASD_PARTN_BITS 2
 
 /* 
+ * struct dasd_information_t
+ * represents any data about the data, which is visible to userspace
+ */
+typedef struct dasd_information_t {
+        unsigned int devno;         /* S/390 devno */
+        unsigned int real_devno;    /* for aliases */
+        unsigned int schid;         /* S/390 subchannel identifier */
+        unsigned int cu_type  : 16; /* from SenseID */
+        unsigned int cu_model :  8; /* from SenseID */
+        unsigned int dev_type : 16; /* from SenseID */
+        unsigned int dev_model : 8; /* from SenseID */
+        unsigned int open_count; 
+        unsigned int req_queue_len; 
+        unsigned int chanq_len;     /* length of chanq */
+        char type[4];               /* from discipline.name, 'none' for unknown */
+        unsigned int status;        /* current device level */
+        unsigned int label_block;   /* where to find the VOLSER */
+        unsigned int FBA_layout;    /* fixed block size (like AIXVOL) */
+        unsigned int characteristics_size;
+        unsigned int confdata_size;
+        char characteristics[64];   /* from read_device_characteristics */
+        char configuration_data[256]; /* from read_configuration_data */
+} dasd_information_t;
+
+/*
+ * Read Subsystem Data - Perfomance Statistics
+ */ 
+typedef struct dasd_rssd_perf_stats_t {
+	unsigned char  invalid:1;
+	unsigned char  format:3;
+	unsigned char  data_format:4;
+	unsigned char  unit_address;
+	unsigned short device_status;
+	unsigned int   nr_read_normal;
+	unsigned int   nr_read_normal_hits;
+	unsigned int   nr_write_normal;
+	unsigned int   nr_write_fast_normal_hits;
+	unsigned int   nr_read_seq;
+	unsigned int   nr_read_seq_hits;
+	unsigned int   nr_write_seq;
+	unsigned int   nr_write_fast_seq_hits;
+	unsigned int   nr_read_cache;
+	unsigned int   nr_read_cache_hits;
+	unsigned int   nr_write_cache;
+	unsigned int   nr_write_fast_cache_hits;
+	unsigned int   nr_inhibit_cache;
+	unsigned int   nr_bybass_cache;
+	unsigned int   nr_seq_dasd_to_cache;
+	unsigned int   nr_dasd_to_cache;
+	unsigned int   nr_cache_to_dasd;
+	unsigned int   nr_delayed_fast_write;
+	unsigned int   nr_normal_fast_write;
+	unsigned int   nr_seq_fast_write;
+	unsigned int   nr_cache_miss;
+	unsigned char  status2;
+	unsigned int   nr_quick_write_promotes;
+	unsigned char  reserved;
+	unsigned short ssid;
+	unsigned char  reseved2[96];
+} __attribute__((packed)) dasd_rssd_perf_stats_t;
+
+/* 
  * struct profile_info_t
  * holds the profinling information 
  */
@@ -62,30 +184,36 @@
 #define DASD_FMT_INT_INVAL  4 /* invalidate tracks */
 #define DASD_FMT_INT_COMPAT 8 /* use OS/390 compatible disk layout */
 
+
 /* 
- * struct dasd_information_t
- * represents any data about the data, which is visible to userspace
+ * struct attrib_data_t
+ * represents the operation (cache) bits for the device.
+ * Used in DE to influence caching of the DASD.
  */
-typedef struct dasd_information_t {
-        unsigned int devno; /* S/390 devno */
-        unsigned int real_devno; /* for aliases */
-        unsigned int schid; /* S/390 subchannel identifier */
-        unsigned int cu_type  : 16; /* from SenseID */
-        unsigned int cu_model :  8; /* from SenseID */
-        unsigned int dev_type : 16; /* from SenseID */
-        unsigned int dev_model : 8; /* from SenseID */
-        unsigned int open_count; 
-        unsigned int req_queue_len; 
-        unsigned int chanq_len;
-        char type[4]; /* from discipline.name, 'none' for unknown */
-        unsigned int status; /* current device level */
-        unsigned int label_block; /* where to find the VOLSER */
-        unsigned int FBA_layout; /* fixed block size (like AIXVOL) */
-        unsigned int characteristics_size;
-        unsigned int confdata_size;
-        char characteristics[64]; /* from read_device_characteristics */
-        char configuration_data[256]; /* from read_configuration_data */
-} dasd_information_t;
+typedef struct attrib_data_t {
+	unsigned char   operation:3;     /* cache operation mode */
+	unsigned char   reserved:5;      /* cache operation mode */
+	unsigned short  nr_cyl;          /* no of cyliners for read ahaed */
+	unsigned char   reserved2[29];   /* for future use */
+} __attribute__ ((packed)) attrib_data_t;
+
+/* definition of operation (cache) bits within attributes of DE */
+#define DASD_NORMAL_CACHE  0x0
+#define DASD_BYPASS_CACHE  0x1
+#define DASD_INHIBIT_LOAD  0x2
+#define DASD_SEQ_ACCESS    0x3
+#define DASD_SEQ_PRESTAGE  0x4
+#define DASD_REC_ACCESS    0x5
+
+
+/********************************************************************************
+ * SECTION: Definition of IOCTLs
+ *
+ * Here ist how the ioctl-nr should be used:
+ *    0 -   31   DASD driver itself
+ *   32 -  239   still open
+ *  240 -  255   reserved for EMC 
+ *******************************************************************************/
 
 /* Disable the volume (for Linux) */
 #define BIODASDDISABLE _IO(DASD_IOCTL_LETTER,0) 
@@ -97,15 +225,26 @@
 #define BIODASDSLCK    _IO(DASD_IOCTL_LETTER,4) /* steal lock */
 /* reset profiling information of a device */
 #define BIODASDPRRST   _IO(DASD_IOCTL_LETTER,5)
+
+
 /* retrieve API version number */
 #define DASDAPIVER     _IOR(DASD_IOCTL_LETTER,0,int)
 /* Get information on a dasd device */
 #define BIODASDINFO    _IOR(DASD_IOCTL_LETTER,1,dasd_information_t)
 /* retrieve profiling information of a device */
 #define BIODASDPRRD    _IOR(DASD_IOCTL_LETTER,2,dasd_profile_info_t)
+/* Get information on a dasd device (enhanced) */
+#define BIODASDINFO2   _IOR(DASD_IOCTL_LETTER,3,dasd_information2_t)
+/* Performance Statistics Read */
+#define BIODASDPSRD    _IOR(DASD_IOCTL_LETTER,4,dasd_rssd_perf_stats_t)
+
+
 /* #define BIODASDFORMAT  _IOW(IOCTL_LETTER,0,format_data_t) , deprecated */
 #define BIODASDFMT     _IOW(DASD_IOCTL_LETTER,1,format_data_t) 
-#endif /* DASD_API_VERSION */
+/* Set Attributes (cache operations) */
+#define BIODASDSATTR   _IOW(DASD_IOCTL_LETTER,2,attrib_data_t) 
+
+
 #endif				/* DASD_H */
 
 /*