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Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
-rw-r--r--drivers/s390/block/dasd_eckd.c337
1 files changed, 200 insertions, 137 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 7d5a6cee4bd..0dfab30e808 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1,7 +1,7 @@
-/*
+/*
* File...........: linux/drivers/s390/block/dasd_eckd.c
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
- * Horst Hummel <Horst.Hummel@de.ibm.com>
+ * Horst Hummel <Horst.Hummel@de.ibm.com>
* Carsten Otte <Cotte@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
@@ -24,6 +24,7 @@
#include <asm/io.h>
#include <asm/todclk.h>
#include <asm/uaccess.h>
+#include <asm/cio.h>
#include <asm/ccwdev.h>
#include "dasd_int.h"
@@ -89,17 +90,22 @@ dasd_eckd_probe (struct ccw_device *cdev)
{
int ret;
- ret = dasd_generic_probe (cdev, &dasd_eckd_discipline);
- if (ret)
+ /* set ECKD specific ccw-device options */
+ ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
+ if (ret) {
+ printk(KERN_WARNING
+ "dasd_eckd_probe: could not set ccw-device options "
+ "for %s\n", cdev->dev.bus_id);
return ret;
- ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE);
- return 0;
+ }
+ ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
+ return ret;
}
static int
dasd_eckd_set_online(struct ccw_device *cdev)
{
- return dasd_generic_set_online (cdev, &dasd_eckd_discipline);
+ return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
}
static struct ccw_driver dasd_eckd_driver = {
@@ -210,14 +216,14 @@ check_XRC (struct ccw1 *de_ccw,
/* switch on System Time Stamp - needed for XRC Support */
if (private->rdc_data.facilities.XRC_supported) {
-
+
data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */
data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */
-
+
data->ep_sys_time = get_clock ();
-
+
de_ccw->count = sizeof (struct DE_eckd_data);
- de_ccw->flags |= CCW_FLAG_SLI;
+ de_ccw->flags |= CCW_FLAG_SLI;
}
return;
@@ -296,8 +302,8 @@ define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk,
/* check for sequential prestage - enhance cylinder range */
if (data->attributes.operation == DASD_SEQ_PRESTAGE ||
data->attributes.operation == DASD_SEQ_ACCESS) {
-
- if (end.cyl + private->attrib.nr_cyl < geo.cyl)
+
+ if (end.cyl + private->attrib.nr_cyl < geo.cyl)
end.cyl += private->attrib.nr_cyl;
else
end.cyl = (geo.cyl - 1);
@@ -317,7 +323,7 @@ locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk,
struct dasd_eckd_private *private;
int sector;
int dn, d;
-
+
private = (struct dasd_eckd_private *) device->private;
DBF_DEV_EVENT(DBF_INFO, device,
@@ -541,6 +547,86 @@ dasd_eckd_read_conf(struct dasd_device *device)
}
/*
+ * Build CP for Perform Subsystem Function - SSC.
+ */
+struct dasd_ccw_req *
+dasd_eckd_build_psf_ssc(struct dasd_device *device)
+{
+ struct dasd_ccw_req *cqr;
+ struct dasd_psf_ssc_data *psf_ssc_data;
+ struct ccw1 *ccw;
+
+ cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ ,
+ sizeof(struct dasd_psf_ssc_data),
+ device);
+
+ if (IS_ERR(cqr)) {
+ DEV_MESSAGE(KERN_WARNING, device, "%s",
+ "Could not allocate PSF-SSC request");
+ return cqr;
+ }
+ psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data;
+ psf_ssc_data->order = PSF_ORDER_SSC;
+ psf_ssc_data->suborder = 0x08;
+
+ ccw = cqr->cpaddr;
+ ccw->cmd_code = DASD_ECKD_CCW_PSF;
+ ccw->cda = (__u32)(addr_t)psf_ssc_data;
+ ccw->count = 66;
+
+ cqr->device = device;
+ cqr->expires = 10*HZ;
+ cqr->buildclk = get_clock();
+ cqr->status = DASD_CQR_FILLED;
+ return cqr;
+}
+
+/*
+ * Perform Subsystem Function.
+ * It is necessary to trigger CIO for channel revalidation since this
+ * call might change behaviour of DASD devices.
+ */
+static int
+dasd_eckd_psf_ssc(struct dasd_device *device)
+{
+ struct dasd_ccw_req *cqr;
+ int rc;
+
+ cqr = dasd_eckd_build_psf_ssc(device);
+ if (IS_ERR(cqr))
+ return PTR_ERR(cqr);
+
+ rc = dasd_sleep_on(cqr);
+ if (!rc)
+ /* trigger CIO to reprobe devices */
+ css_schedule_reprobe();
+ dasd_sfree_request(cqr, cqr->device);
+ return rc;
+}
+
+/*
+ * Valide storage server of current device.
+ */
+static int
+dasd_eckd_validate_server(struct dasd_device *device)
+{
+ int rc;
+
+ /* Currently PAV is the only reason to 'validate' server on LPAR */
+ if (dasd_nopav || MACHINE_IS_VM)
+ return 0;
+
+ rc = dasd_eckd_psf_ssc(device);
+ if (rc)
+ /* may be requested feature is not available on server,
+ * therefore just report error and go ahead */
+ DEV_MESSAGE(KERN_INFO, device,
+ "Perform Subsystem Function returned rc=%d", rc);
+ /* RE-Read Configuration Data */
+ return dasd_eckd_read_conf(device);
+}
+
+/*
* Check device characteristics.
* If the device is accessible using ECKD discipline, the device is enabled.
*/
@@ -554,7 +640,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
private = (struct dasd_eckd_private *) device->private;
if (private == NULL) {
- private = kmalloc(sizeof(struct dasd_eckd_private),
+ private = kzalloc(sizeof(struct dasd_eckd_private),
GFP_KERNEL | GFP_DMA);
if (private == NULL) {
DEV_MESSAGE(KERN_WARNING, device, "%s",
@@ -562,7 +648,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
"data");
return -ENOMEM;
}
- memset(private, 0, sizeof(struct dasd_eckd_private));
device->private = (void *) private;
}
/* Invalidate status of initial analysis. */
@@ -571,16 +656,29 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
private->attrib.operation = DASD_NORMAL_CACHE;
private->attrib.nr_cyl = 0;
+ /* Read Configuration Data */
+ rc = dasd_eckd_read_conf(device);
+ if (rc)
+ return rc;
+
+ /* Generate device unique id and register in devmap */
+ rc = dasd_eckd_generate_uid(device, &uid);
+ if (rc)
+ return rc;
+ rc = dasd_set_uid(device->cdev, &uid);
+ if (rc == 1) /* new server found */
+ rc = dasd_eckd_validate_server(device);
+ if (rc)
+ return rc;
+
/* Read Device Characteristics */
rdc_data = (void *) &(private->rdc_data);
memset(rdc_data, 0, sizeof(rdc_data));
rc = read_dev_chars(device->cdev, &rdc_data, 64);
- if (rc) {
+ if (rc)
DEV_MESSAGE(KERN_WARNING, device,
- "Read device characteristics returned error %d",
- rc);
- return rc;
- }
+ "Read device characteristics returned "
+ "rc=%d", rc);
DEV_MESSAGE(KERN_INFO, device,
"%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d",
@@ -591,19 +689,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
private->rdc_data.no_cyl,
private->rdc_data.trk_per_cyl,
private->rdc_data.sec_per_trk);
-
- /* Read Configuration Data */
- rc = dasd_eckd_read_conf (device);
- if (rc)
- return rc;
-
- /* Generate device unique id and register in devmap */
- rc = dasd_eckd_generate_uid(device, &uid);
- if (rc)
- return rc;
-
- rc = dasd_set_uid(device->cdev, &uid);
-
return rc;
}
@@ -773,7 +858,7 @@ dasd_eckd_end_analysis(struct dasd_device *device)
((private->rdc_data.no_cyl *
private->rdc_data.trk_per_cyl *
blk_per_trk * (device->bp_block >> 9)) >> 1),
- ((blk_per_trk * device->bp_block) >> 10),
+ ((blk_per_trk * device->bp_block) >> 10),
private->uses_cdl ?
"compatible disk layout" : "linux disk layout");
@@ -970,7 +1055,7 @@ dasd_eckd_format_device(struct dasd_device * device,
if (i < 3) {
ect->kl = 4;
ect->dl = sizes_trk0[i] - 4;
- }
+ }
}
if ((fdata->intensity & 0x08) &&
fdata->start_unit == 1) {
@@ -1270,7 +1355,7 @@ dasd_eckd_fill_info(struct dasd_device * device,
/*
* Release device ioctl.
- * Buils a channel programm to releases a prior reserved
+ * Buils a channel programm to releases a prior reserved
* (see dasd_eckd_reserve) device.
*/
static int
@@ -1310,8 +1395,8 @@ dasd_eckd_release(struct dasd_device *device)
/*
* Reserve device ioctl.
* Options are set to 'synchronous wait for interrupt' and
- * 'timeout the request'. This leads to a terminate IO if
- * the interrupt is outstanding for a certain time.
+ * 'timeout the request'. This leads to a terminate IO if
+ * the interrupt is outstanding for a certain time.
*/
static int
dasd_eckd_reserve(struct dasd_device *device)
@@ -1349,7 +1434,7 @@ dasd_eckd_reserve(struct dasd_device *device)
/*
* Steal lock ioctl - unconditional reserve device.
- * Buils a channel programm to break a device's reservation.
+ * Buils a channel programm to break a device's reservation.
* (unconditional reserve)
*/
static int
@@ -1522,6 +1607,40 @@ 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 +1649,8 @@ 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 +1658,8 @@ 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 +1684,55 @@ 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);
}
@@ -1685,14 +1773,8 @@ static struct dasd_discipline dasd_eckd_discipline = {
static int __init
dasd_eckd_init(void)
{
- int ret;
-
ASCEBC(dasd_eckd_discipline.ebcname, 4);
-
- ret = ccw_driver_register(&dasd_eckd_driver);
- if (!ret)
- dasd_generic_auto_online(&dasd_eckd_driver);
- return ret;
+ return ccw_driver_register(&dasd_eckd_driver);
}
static void __exit
@@ -1703,22 +1785,3 @@ dasd_eckd_cleanup(void)
module_init(dasd_eckd_init);
module_exit(dasd_eckd_cleanup);
-
-/*
- * 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:
- */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-29 06:55:47 +0000