patch-2.4.2 linux/include/asm-s390/ccwcache.h

• Lines: 85
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390/ccwcache.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390/ccwcache.h linux/include/asm-s390/ccwcache.h
@@ -0,0 +1,84 @@
+/* 
+   * File...........: linux/include/asm-s390/ccwcache.h
+   * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+   * Bugreports.to..: <Linux390@de.ibm.com>
+   * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
+ */
+#ifndef CCWCACHE_H
+#define CCWCACHE_H
+#include <linux/slab.h>
+#include <asm/irq.h>
+
+#ifndef __KERNEL__
+#define kmem_cache_t void
+#endif /* __KERNEL__ */
+
+typedef struct ccw_req_t {
+	/* eye catcher plus queueing information  */
+	unsigned int magic;	
+	struct ccw_req_t *next;	/* pointer to next ccw_req_t in queue */
+	struct ccw_req_t *int_next;	/* for internal queueing */
+	struct ccw_req_t *int_prev;	/* for internal queueing */
+
+	/* Where to execute what... */
+	void *device;		/* index of the device the req is for */
+	void *req;		/* pointer to originating request */
+	ccw1_t *cpaddr;		/* address of channel program */
+	char status;	        /* reflecting the status of this request */
+	char flags;              /* see below */
+	short retries;		/* A retry counter to be set when filling */
+
+	/* ... and how */
+	int options;		/* options for execution */
+	char lpm;               /* logical path mask                      */
+	void *data;		/* pointer to data area */
+	devstat_t *dstat;	/* The device status in case of an error */
+
+	/* these are important for recovering erroneous requests          */
+	struct ccw_req_t *refers;	/* Does this request refer to another one? */
+	void *function; /* refers to the originating ERP action */ ;
+
+	unsigned long long expires;	/* expiratioj period */
+	/* these are for profiling purposes */
+	unsigned long long buildclk;	/* TOD-clock of request generation */
+	unsigned long long startclk;	/* TOD-clock of request start */
+	unsigned long long stopclk;	/* TOD-clock of request interrupt */
+	unsigned long long endclk;	/* TOD-clock of request termination */
+
+	/* these are for internal use */
+	int cplength;		/* length of the channel program in CCWs */
+	int datasize;		/* amount of additional data in bytes */
+	kmem_cache_t *cache;	/* the cache this data comes from */
+
+} __attribute__ ((aligned(4))) ccw_req_t;
+
+/* 
+ * ccw_req_t -> status can be:
+ */
+#define CQR_STATUS_EMPTY    0x00	/* request is empty */
+#define CQR_STATUS_FILLED   0x01	/* request is ready to be preocessed */
+#define CQR_STATUS_QUEUED   0x02	/* request is queued to be processed */
+#define CQR_STATUS_IN_IO    0x03	/* request is currently in IO */
+#define CQR_STATUS_DONE     0x04	/* request is completed sucessfully */
+#define CQR_STATUS_ERROR    0x05	/* request is completed with error */
+#define CQR_STATUS_FAILED   0x06	/* request is finally failed */
+
+#define CQR_FLAGS_CHAINED  0x01	/* request is chained by another (last CCW is TIC) */
+
+#ifdef __KERNEL__
+#define SMALLEST_SLAB (sizeof(struct ccw_req_t) <= 128 ? 128 :\
+ sizeof(struct ccw_req_t) <= 256 ? 256 : 512 )
+
+/* SMALLEST_SLAB(1),... PAGE_SIZE(CCW_NUMBER_CACHES) */
+#define CCW_NUMBER_CACHES (sizeof(struct ccw_req_t) <= 128 ? 6 :\
+ sizeof(struct ccw_req_t) <= 256 ? 5 : 4 )
+
+int ccwcache_init (void);
+
+ccw_req_t *ccw_alloc_request (char *magic, int cplength, int additional_data);
+void ccw_free_request (ccw_req_t * request);
+#endif /* __KERNEL__ */
+#endif				/* CCWCACHE_H */
+
+
+