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path: root/drivers/s390/block/dasd_eckd.c
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Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
-rw-r--r--drivers/s390/block/dasd_eckd.c145
1 files changed, 74 insertions, 71 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 7d5a6cee4bd8..7565d30f8c2f 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1522,6 +1522,40 @@ dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp)
}
/*
+ * Dump the range of CCWs into 'page' buffer
+ * and return number of printed chars.
+ */
+static inline int
+dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page)
+{
+ int len, count;
+ char *datap;
+
+ len = 0;
+ while (from <= to) {
+ len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " CCW %p: %08X %08X DAT:",
+ from, ((int *) from)[0], ((int *) from)[1]);
+
+ /* get pointer to data (consider IDALs) */
+ if (from->flags & CCW_FLAG_IDA)
+ datap = (char *) *((addr_t *) (addr_t) from->cda);
+ else
+ datap = (char *) ((addr_t) from->cda);
+
+ /* dump data (max 32 bytes) */
+ for (count = 0; count < from->count && count < 32; count++) {
+ if (count % 8 == 0) len += sprintf(page + len, " ");
+ if (count % 4 == 0) len += sprintf(page + len, " ");
+ len += sprintf(page + len, "%02x", datap[count]);
+ }
+ len += sprintf(page + len, "\n");
+ from++;
+ }
+ return len;
+}
+
+/*
* Print sense data and related channel program.
* Parts are printed because printk buffer is only 1024 bytes.
*/
@@ -1530,8 +1564,8 @@ dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
struct irb *irb)
{
char *page;
- struct ccw1 *act, *end, *last;
- int len, sl, sct, count;
+ struct ccw1 *first, *last, *fail, *from, *to;
+ int len, sl, sct;
page = (char *) get_zeroed_page(GFP_ATOMIC);
if (page == NULL) {
@@ -1539,7 +1573,8 @@ dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
"No memory to dump sense data");
return;
}
- len = sprintf(page, KERN_ERR PRINTK_HEADER
+ /* dump the sense data */
+ len = sprintf(page, KERN_ERR PRINTK_HEADER
" I/O status report for device %s:\n",
device->cdev->dev.bus_id);
len += sprintf(page + len, KERN_ERR PRINTK_HEADER
@@ -1564,87 +1599,55 @@ dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
if (irb->ecw[27] & DASD_SENSE_BIT_0) {
/* 24 Byte Sense Data */
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " 24 Byte: %x MSG %x, "
- "%s MSGb to SYSOP\n",
- irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
- irb->ecw[1] & 0x10 ? "" : "no");
+ sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " 24 Byte: %x MSG %x, "
+ "%s MSGb to SYSOP\n",
+ irb->ecw[7] >> 4, irb->ecw[7] & 0x0f,
+ irb->ecw[1] & 0x10 ? "" : "no");
} else {
/* 32 Byte Sense Data */
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " 32 Byte: Format: %x "
- "Exception class %x\n",
- irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
+ sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " 32 Byte: Format: %x "
+ "Exception class %x\n",
+ irb->ecw[6] & 0x0f, irb->ecw[22] >> 4);
}
} else {
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " SORRY - NO VALID SENSE AVAILABLE\n");
+ sprintf(page + len, KERN_ERR PRINTK_HEADER
+ " SORRY - NO VALID SENSE AVAILABLE\n");
}
- MESSAGE_LOG(KERN_ERR, "%s",
- page + sizeof(KERN_ERR PRINTK_HEADER));
-
- /* dump the Channel Program */
- /* print first CCWs (maximum 8) */
- act = req->cpaddr;
- for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
- end = min(act + 8, last);
- len = sprintf(page, KERN_ERR PRINTK_HEADER
+ printk("%s", page);
+
+ /* dump the Channel Program (max 140 Bytes per line) */
+ /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */
+ first = req->cpaddr;
+ for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
+ to = min(first + 6, last);
+ len = sprintf(page, KERN_ERR PRINTK_HEADER
" Related CP in req: %p\n", req);
- while (act <= end) {
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " CCW %p: %08X %08X DAT:",
- act, ((int *) act)[0], ((int *) act)[1]);
- for (count = 0; count < 32 && count < act->count;
- count += sizeof(int))
- len += sprintf(page + len, " %08X",
- ((int *) (addr_t) act->cda)
- [(count>>2)]);
- len += sprintf(page + len, "\n");
- act++;
- }
- MESSAGE_LOG(KERN_ERR, "%s",
- page + sizeof(KERN_ERR PRINTK_HEADER));
+ dasd_eckd_dump_ccw_range(first, to, page + len);
+ printk("%s", page);
- /* print failing CCW area */
+ /* print failing CCW area (maximum 4) */
+ /* scsw->cda is either valid or zero */
len = 0;
- if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) {
- act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2;
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
- }
- end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last);
- while (act <= end) {
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " CCW %p: %08X %08X DAT:",
- act, ((int *) act)[0], ((int *) act)[1]);
- for (count = 0; count < 32 && count < act->count;
- count += sizeof(int))
- len += sprintf(page + len, " %08X",
- ((int *) (addr_t) act->cda)
- [(count>>2)]);
- len += sprintf(page + len, "\n");
- act++;
+ from = ++to;
+ fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */
+ if (from < fail - 2) {
+ from = fail - 2; /* there is a gap - print header */
+ len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n");
}
+ to = min(fail + 1, last);
+ len += dasd_eckd_dump_ccw_range(from, to, page + len);
- /* print last CCWs */
- if (act < last - 2) {
- act = last - 2;
+ /* print last CCWs (maximum 2) */
+ from = max(from, ++to);
+ if (from < last - 1) {
+ from = last - 1; /* there is a gap - print header */
len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
}
- while (act <= last) {
- len += sprintf(page + len, KERN_ERR PRINTK_HEADER
- " CCW %p: %08X %08X DAT:",
- act, ((int *) act)[0], ((int *) act)[1]);
- for (count = 0; count < 32 && count < act->count;
- count += sizeof(int))
- len += sprintf(page + len, " %08X",
- ((int *) (addr_t) act->cda)
- [(count>>2)]);
- len += sprintf(page + len, "\n");
- act++;
- }
+ len += dasd_eckd_dump_ccw_range(from, last, page + len);
if (len > 0)
- MESSAGE_LOG(KERN_ERR, "%s",
- page + sizeof(KERN_ERR PRINTK_HEADER));
+ printk("%s", page);
free_page((unsigned long) page);
}
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