patch-2.2.16 linux/drivers/s390/block/dasd_3990_erp.c

• Lines: 141
• Date: Wed Jun 7 14:26:43 2000
• Orig file: v2.2.15/linux/drivers/s390/block/dasd_3990_erp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN v2.2.15/linux/drivers/s390/block/dasd_3990_erp.c linux/drivers/s390/block/dasd_3990_erp.c
@@ -0,0 +1,140 @@
+/* 
+ * File...........: linux/drivers/s390/block/dasd_3990_erp.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ *                  Horst  Hummel    <Horst.Hummel@de.ibm.com> 
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
+ */
+
+#include <linux/dasd.h>
+#include "dasd_erp.h"
+
+#define PRINTK_HEADER "dasd_erp(3990)"
+
+/*
+ * DASD_3990_ERP_EXAMINE_32 
+ *
+ * DESCRIPTION
+ *   Checks only for fatal/no/recoverable error. 
+ *   A detailed examination of the sense data is done later outside
+ *   the interrupt handler.
+ *
+ * RETURN VALUES
+ *   dasd_era_none      no error 
+ *   dasd_era_fatal     for all fatal (unrecoverable errors)
+ *   dasd_era_recover   for recoverable others.
+ */
+dasd_era_t
+dasd_3990_erp_examine_32 (char *sense)
+{
+
+	switch (sense[25]) {
+	case 0x00:
+		return dasd_era_none;
+	case 0x01:
+		return dasd_era_fatal;
+	default:
+		return dasd_era_recover;
+	}
+
+}				/* end dasd_3990_erp_examine_32 */
+
+/*
+ * DASD_3990_ERP_EXAMINE_24 
+ *
+ * DESCRIPTION
+ *   Checks only for fatal (unrecoverable) error. 
+ *   A detailed examination of the sense data is done later outside
+ *   the interrupt handler.
+ *
+ *   Each bit configuration leading to an action code 2 (Exit with
+ *   programming error or unusual condition indication)
+ *   and 10 (disabled interface) are handled as fatal errorīs.
+ * 
+ *   All other configurations are handled as recoverable errors.
+ *
+ * RETURN VALUES
+ *   dasd_era_fatal     for all fatal (unrecoverable errors)
+ *   dasd_era_recover   for all others.
+ */
+dasd_era_t
+dasd_3990_erp_examine_24 (char *sense)
+{
+
+	/* check for 'Command Recejct' which is always a fatal error  */
+	if (sense[0] & 0x80) {
+		return dasd_era_fatal;
+	}
+	/* check for 'Invalid Track Format'                           */
+	if (sense[1] & 0x40) {
+		return dasd_era_fatal;
+	}
+	/* check for 'No Record Found'                                */
+	if (sense[1] & 0x08) {
+		return dasd_era_fatal;
+	}
+	/* return recoverable for all others                          */
+	return dasd_era_recover;
+
+}				/* END dasd_3990_erp_examine_24 */
+
+/*
+ * DASD_3990_ERP_EXAMINE 
+ *
+ * DESCRIPTION
+ *   Checks only for fatal/no/recover error. 
+ *   A detailed examination of the sense data is done later outside
+ *   the interrupt handler.
+ *
+ *   The logic is based on the 'IBM 3990 Storage Control  Reference' manual
+ *   'Chapter 7. Error Recovery Procedures'.
+ *
+ * RETURN VALUES
+ *   dasd_era_none      no error 
+ *   dasd_era_fatal     for all fatal (unrecoverable errors)
+ *   dasd_era_recover   for all others.
+ */
+dasd_era_t
+dasd_3990_erp_examine (cqr_t * cqr, devstat_t * stat)
+{
+
+	char *sense = stat->ii.sense.data;
+
+	/* check for successful execution first */
+	if (stat->cstat == 0x00 &&
+	    stat->dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+		return dasd_era_none;
+
+	/* distinguish between 24 and 32 byte sense data */
+	if (sense[27] & 0x80) {
+
+		/* examine the 32 byte sense data */
+		return dasd_3990_erp_examine_32 (sense);
+
+	} else {
+
+		/* examine the 24 byte sense data */
+		return dasd_3990_erp_examine_24 (sense);
+
+	}			/* end distinguish between 24 and 32 byte sense data */
+
+}				/* END dasd_3990_erp_examine */
+
+/*
+ * 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:
+ */