1 files changed, 104 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd_3370_erp.c b/drivers/s390/block/dasd_3370_erp.c
new file mode 100644
index 000000000000..84565c8f584e
--- /dev/null
+++ b/drivers/s390/block/dasd_3370_erp.c
@@ -0,0 +1,104 @@
+/* 
+ * File...........: linux/drivers/s390/block/dasd_3370_erp.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000
+ *
+ * $Revision: 1.9 $
+ */
+
+#define PRINTK_HEADER "dasd_erp(3370)"
+
+#include "dasd_int.h"
+
+
+/*
+ * DASD_3370_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 3880 Storage Control Reference' manual
+ *   'Chapter 7. 3370 Sense Data'.
+ *
+ * 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_3370_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
+{
+        char *sense = irb->ecw;
+
+        /* check for successful execution first */
+        if (irb->scsw.cstat == 0x00 &&
+            irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+                return dasd_era_none;
+        if (sense[0] & 0x80) {  /* CMD reject */
+                return dasd_era_fatal;
+        }
+        if (sense[0] & 0x40) {  /* Drive offline */
+                return dasd_era_recover;
+        }
+        if (sense[0] & 0x20) {  /* Bus out parity */
+                return dasd_era_recover;
+        }
+        if (sense[0] & 0x10) {  /* equipment check */
+                if (sense[1] & 0x80) {
+                        return dasd_era_fatal;
+                }
+                return dasd_era_recover;
+        }
+        if (sense[0] & 0x08) {  /* data check */
+                if (sense[1] & 0x80) {
+                        return dasd_era_fatal;
+                }
+                return dasd_era_recover;
+        }
+        if (sense[0] & 0x04) {  /* overrun */
+                if (sense[1] & 0x80) {
+                        return dasd_era_fatal;
+                }
+                return dasd_era_recover;
+        }
+        if (sense[1] & 0x40) {  /* invalid blocksize */
+                return dasd_era_fatal;
+        }
+        if (sense[1] & 0x04) {  /* file protected */
+                return dasd_era_recover;
+        }
+        if (sense[1] & 0x01) {  /* operation incomplete */
+                return dasd_era_recover;
+        }
+        if (sense[2] & 0x80) {  /* check data erroor */
+                return dasd_era_recover;
+        }
+        if (sense[2] & 0x10) {  /* Env. data present */
+                return dasd_era_recover;
+        }
+        /* examine the 24 byte sense data */
+        return dasd_era_recover;
+
+}                               /* END dasd_3370_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: 1
+ * tab-width: 8
+ * End:
+ */