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[PATCH] s390: multiple subchannel sets support

Browse Source 
Add support for multiple subchannel sets.  Works with arbitrary devices in
subchannel set 1 and is transparent to device drivers.  Although currently
only two subchannel sets are available, this will work with the architectured
maximum number of subchannel sets as well.

Signed-off-by: Cornelia Huck <cohuck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cornelia Huck 2006-01-06 00:19:25 -08:00 committed by Linus Torvalds
parent 678a395b35
commit fb6958a594
16 changed files with 354 additions and 165 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
drivers/s390/cio/blacklist.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/blacklist.c
* S/390 common I/O routines -- blacklisting of specific devices
* $Revision: 1.35 $
* $Revision: 1.39 $
*
* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -35,10 +35,10 @@
* These can be single devices or ranges of devices
*/
/* 65536 bits to indicate if a devno is blacklisted or not */
/* 65536 bits for each set to indicate if a devno is blacklisted or not */
#define __BL_DEV_WORDS ((__MAX_SUBCHANNEL + (8*sizeof(long) - 1)) / \
(8*sizeof(long)))
static unsigned long bl_dev[__BL_DEV_WORDS];
static unsigned long bl_dev[__MAX_SSID + 1][__BL_DEV_WORDS];
typedef enum {add, free} range_action;
/*
@ -46,21 +46,23 @@ typedef enum {add, free} range_action;
* (Un-)blacklist the devices from-to
*/
static inline void
blacklist_range (range_action action, unsigned int from, unsigned int to)
blacklist_range (range_action action, unsigned int from, unsigned int to,
unsigned int ssid)
{
if (!to)
to = from;
if (from > to || to > __MAX_SUBCHANNEL) {
if (from > to || to > __MAX_SUBCHANNEL || ssid > __MAX_SSID) {
printk (KERN_WARNING "Invalid blacklist range "
"0x%04x to 0x%04x, skipping\n", from, to);
"0.%x.%04x to 0.%x.%04x, skipping\n",
ssid, from, ssid, to);
return;
}
for (; from <= to; from++) {
if (action == add)
set_bit (from, bl_dev);
set_bit (from, bl_dev[ssid]);
else
clear_bit (from, bl_dev);
clear_bit (from, bl_dev[ssid]);
}
}
@ -70,7 +72,7 @@ blacklist_range (range_action action, unsigned int from, unsigned int to)
* Shamelessly grabbed from dasd_devmap.c.
*/
static inline int
blacklist_busid(char **str, int *id0, int *id1, int *devno)
blacklist_busid(char **str, int *id0, int *ssid, int *devno)
{
int val, old_style;
char *sav;
@ -87,7 +89,7 @@ blacklist_busid(char **str, int *id0, int *id1, int *devno)
goto confused;
val = simple_strtoul(*str, str, 16);
if (old_style || (*str)[0] != '.') {
*id0 = *id1 = 0;
*id0 = *ssid = 0;
if (val < 0 || val > 0xffff)
goto confused;
*devno = val;
@ -106,7 +108,7 @@ blacklist_busid(char **str, int *id0, int *id1, int *devno)
val = simple_strtoul(*str, str, 16);
if (val < 0 || val > 0xff || (*str)++[0] != '.')
goto confused;
*id1 = val;
*ssid = val;
if (!isxdigit((*str)[0])) /* We require at least one hex digit */
goto confused;
val = simple_strtoul(*str, str, 16);
@ -126,7 +128,7 @@ confused:
static inline int
blacklist_parse_parameters (char *str, range_action action)
{
unsigned int from, to, from_id0, to_id0, from_id1, to_id1;
unsigned int from, to, from_id0, to_id0, from_ssid, to_ssid;
while (*str != 0 && *str != '\n') {
range_action ra = action;
@ -143,23 +145,25 @@ blacklist_parse_parameters (char *str, range_action action)
*/
if (strncmp(str,"all,",4) == 0 || strcmp(str,"all") == 0 ||
strncmp(str,"all\n",4) == 0 || strncmp(str,"all ",4) == 0) {
from = 0;
to = __MAX_SUBCHANNEL;
int j;
str += 3;
for (j=0; j <= __MAX_SSID; j++)
blacklist_range(ra, 0, __MAX_SUBCHANNEL, j);
} else {
int rc;
rc = blacklist_busid(&str, &from_id0,
&from_id1, &from);
&from_ssid, &from);
if (rc)
continue;
to = from;
to_id0 = from_id0;
to_id1 = from_id1;
to_ssid = from_ssid;
if (*str == '-') {
str++;
rc = blacklist_busid(&str, &to_id0,
&to_id1, &to);
&to_ssid, &to);
if (rc)
continue;
}
@ -169,18 +173,19 @@ blacklist_parse_parameters (char *str, range_action action)
strsep(&str, ",\n"));
continue;
}
if ((from_id0 != to_id0) || (from_id1 != to_id1)) {
if ((from_id0 != to_id0) ||
(from_ssid != to_ssid)) {
printk(KERN_WARNING "invalid cio_ignore range "
"%x.%x.%04x-%x.%x.%04x\n",
from_id0, from_id1, from,
to_id0, to_id1, to);
from_id0, from_ssid, from,
to_id0, to_ssid, to);
continue;
}
pr_debug("blacklist_setup: adding range "
"from %x.%x.%04x to %x.%x.%04x\n",
from_id0, from_ssid, from, to_id0, to_ssid, to);
blacklist_range (ra, from, to, to_ssid);
}
/* FIXME: ignoring id0 and id1 here. */
pr_debug("blacklist_setup: adding range "
"from 0.0.%04x to 0.0.%04x\n", from, to);
blacklist_range (ra, from, to);
}
return 1;
}
@ -214,9 +219,9 @@ __setup ("cio_ignore=", blacklist_setup);
* Used by validate_subchannel()
*/
int
is_blacklisted (int devno)
is_blacklisted (int ssid, int devno)
{
return test_bit (devno, bl_dev);
return test_bit (devno, bl_dev[ssid]);
}
#ifdef CONFIG_PROC_FS
@ -283,6 +288,7 @@ blacklist_parse_proc_parameters (char *buf)
/* Iterator struct for all devices. */
struct ccwdev_iter {
int devno;
int ssid;
int in_range;
};
@ -291,13 +297,14 @@ cio_ignore_proc_seq_start(struct seq_file *s, loff_t *offset)
{
struct ccwdev_iter *iter;
if (*offset > __MAX_SUBCHANNEL)
if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
return NULL;
iter = kmalloc(sizeof(struct ccwdev_iter), GFP_KERNEL);
if (!iter)
return ERR_PTR(-ENOMEM);
memset(iter, 0, sizeof(struct ccwdev_iter));
iter->devno = *offset;
iter->ssid = *offset / (__MAX_SUBCHANNEL + 1);
iter->devno = *offset % (__MAX_SUBCHANNEL + 1);
return iter;
}
@ -313,10 +320,16 @@ cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
{
struct ccwdev_iter *iter;
if (*offset > __MAX_SUBCHANNEL)
if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
return NULL;
iter = (struct ccwdev_iter *)it;
iter->devno++;
if (iter->devno == __MAX_SUBCHANNEL) {
iter->devno = 0;
iter->ssid++;
if (iter->ssid > __MAX_SSID)
return NULL;
} else
iter->devno++;
(*offset)++;
return iter;
}
@ -327,23 +340,24 @@ cio_ignore_proc_seq_show(struct seq_file *s, void *it)
struct ccwdev_iter *iter;
iter = (struct ccwdev_iter *)it;
if (!is_blacklisted(iter->devno))
if (!is_blacklisted(iter->ssid, iter->devno))
/* Not blacklisted, nothing to output. */
return 0;
if (!iter->in_range) {
/* First device in range. */
if ((iter->devno == __MAX_SUBCHANNEL) ||
!is_blacklisted(iter->devno + 1))
!is_blacklisted(iter->ssid, iter->devno + 1))
/* Singular device. */
return seq_printf(s, "0.0.%04x\n", iter->devno);
return seq_printf(s, "0.%x.%04x\n",
iter->ssid, iter->devno);
iter->in_range = 1;
return seq_printf(s, "0.0.%04x-", iter->devno);
return seq_printf(s, "0.%x.%04x-", iter->ssid, iter->devno);
}
if ((iter->devno == __MAX_SUBCHANNEL) ||
!is_blacklisted(iter->devno + 1)) {
!is_blacklisted(iter->ssid, iter->devno + 1)) {
/* Last device in range. */
iter->in_range = 0;
return seq_printf(s, "0.0.%04x\n", iter->devno);
return seq_printf(s, "0.%x.%04x\n", iter->ssid, iter->devno);
}
return 0;
}

2
drivers/s390/cio/blacklist.h
View File

@ -1,6 +1,6 @@
#ifndef S390_BLACKLIST_H
#define S390_BLACKLIST_H
extern int is_blacklisted (int devno);
extern int is_blacklisted (int ssid, int devno);
#endif

68
drivers/s390/cio/chsc.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/chsc.c
* S/390 common I/O routines -- channel subsystem call
* $Revision: 1.120 $
* $Revision: 1.126 $
*
* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -75,7 +75,9 @@ chsc_get_sch_desc_irq(struct subchannel *sch, void *page)
struct {
struct chsc_header request;
u16 reserved1;
u16 reserved1a:10;
u16 ssid:2;
u16 reserved1b:4;
u16 f_sch; /* first subchannel */
u16 reserved2;
u16 l_sch; /* last subchannel */
@ -102,6 +104,7 @@ chsc_get_sch_desc_irq(struct subchannel *sch, void *page)
.code = 0x0004,
};
ssd_area->ssid = sch->schid.ssid;
ssd_area->f_sch = sch->schid.sch_no;
ssd_area->l_sch = sch->schid.sch_no;
@ -145,8 +148,8 @@ chsc_get_sch_desc_irq(struct subchannel *sch, void *page)
*/
if (ssd_area->st > 3) { /* uhm, that looks strange... */
CIO_CRW_EVENT(0, "Strange subchannel type %d"
" for sch %04x\n", ssd_area->st,
sch->schid.sch_no);
" for sch 0.%x.%04x\n", ssd_area->st,
sch->schid.ssid, sch->schid.sch_no);
/*
* There may have been a new subchannel type defined in the
* time since this code was written; since we don't know which
@ -155,8 +158,9 @@ chsc_get_sch_desc_irq(struct subchannel *sch, void *page)
return 0;
} else {
const char *type[4] = {"I/O", "chsc", "message", "ADM"};
CIO_CRW_EVENT(6, "ssd: sch %04x is %s subchannel\n",
sch->schid.sch_no, type[ssd_area->st]);
CIO_CRW_EVENT(6, "ssd: sch 0.%x.%04x is %s subchannel\n",
sch->schid.ssid, sch->schid.sch_no,
type[ssd_area->st]);
sch->ssd_info.valid = 1;
sch->ssd_info.type = ssd_area->st;
@ -364,7 +368,7 @@ s390_process_res_acc_new_sch(struct subchannel_id schid)
* that beast may be on we'll have to do a stsch
* on all devices, grr...
*/
if (stsch(schid, &schib))
if (stsch_err(schid, &schib))
/* We're through */
return need_rescan ? -EAGAIN : -ENXIO;
@ -818,7 +822,7 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
put_device(&sch->dev);
return 0;
}
if (stsch(schid, &schib))
if (stsch_err(schid, &schib))
/* We're through */
return -ENXIO;
/* Put it on the slow path. */
@ -1078,6 +1082,54 @@ chsc_alloc_sei_area(void)
return (sei_page ? 0 : -ENOMEM);
}
int __init
chsc_enable_facility(int operation_code)
{
int ret;
struct {
struct chsc_header request;
u8 reserved1:4;
u8 format:4;
u8 reserved2;
u16 operation_code;
u32 reserved3;
u32 reserved4;
u32 operation_data_area[252];
struct chsc_header response;
u32 reserved5:4;
u32 format2:4;
u32 reserved6:24;
} *sda_area;
sda_area = (void *)get_zeroed_page(GFP_KERNEL|GFP_DMA);
if (!sda_area)
return -ENOMEM;
sda_area->request = (struct chsc_header) {
.length = 0x0400,
.code = 0x0031,
};
sda_area->operation_code = operation_code;
ret = chsc(sda_area);
if (ret > 0) {
ret = (ret == 3) ? -ENODEV : -EBUSY;
goto out;
}
switch (sda_area->response.code) {
case 0x0003: /* invalid request block */
case 0x0007:
ret = -EINVAL;
break;
case 0x0004: /* command not provided */
case 0x0101: /* facility not provided */
ret = -EOPNOTSUPP;
break;
}
out:
free_page((unsigned long)sda_area);
return ret;
}
subsys_initcall(chsc_alloc_sei_area);
struct css_general_char css_general_characteristics;

4
drivers/s390/cio/chsc.h
View File

@ -5,6 +5,8 @@
#define CHSC_SEI_ACC_LINKADDR 2
#define CHSC_SEI_ACC_FULLLINKADDR 3
#define CHSC_SDA_OC_MSS 0x2
struct chsc_header {
u16 length;
u16 code;
@ -64,6 +66,8 @@ extern int css_characteristics_avail;
extern void *chsc_get_chp_desc(struct subchannel*, int);
extern int chsc_enable_facility(int);
#define to_channelpath(dev) container_of(dev, struct channel_path, dev)
#endif

35
drivers/s390/cio/cio.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/cio.c
* S/390 common I/O routines -- low level i/o calls
* $Revision: 1.135 $
* $Revision: 1.138 $
*
* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -166,7 +166,8 @@ cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
stsch (sch->schid, &sch->schib);
CIO_MSG_EVENT(0, "cio_start: 'not oper' status for "
"subchannel %04x!\n", sch->schid.sch_no);
"subchannel 0.%x.%04x!\n", sch->schid.ssid,
sch->schid.sch_no);
sprintf(dbf_text, "no%s", sch->dev.bus_id);
CIO_TRACE_EVENT(0, dbf_text);
CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
@ -522,15 +523,18 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
spin_lock_init(&sch->lock);
/* Set a name for the subchannel */
snprintf (sch->dev.bus_id, BUS_ID_SIZE, "0.0.%04x", schid.sch_no);
snprintf (sch->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x", schid.ssid,
schid.sch_no);
/*
* The first subchannel that is not-operational (ccode==3)
* indicates that there aren't any more devices available.
* If stsch gets an exception, it means the current subchannel set
* is not valid.
*/
ccode = stsch (schid, &sch->schib);
ccode = stsch_err (schid, &sch->schib);
if (ccode)
return -ENXIO;
return (ccode == 3) ? -ENXIO : ccode;
sch->schid = schid;
/* Copy subchannel type from path management control word. */
@ -541,9 +545,9 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
*/
if (sch->st != 0) {
CIO_DEBUG(KERN_INFO, 0,
"Subchannel %04X reports "
"Subchannel 0.%x.%04x reports "
"non-I/O subchannel type %04X\n",
sch->schid.sch_no, sch->st);
sch->schid.ssid, sch->schid.sch_no, sch->st);
/* We stop here for non-io subchannels. */
return sch->st;
}
@ -554,26 +558,29 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
return -ENODEV;
/* Devno is valid. */
if (is_blacklisted (sch->schib.pmcw.dev)) {
if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
* This device must not be known to Linux. So we simply
* say that there is no device and return ENODEV.
*/
CIO_MSG_EVENT(0, "Blacklisted device detected "
"at devno %04X\n", sch->schib.pmcw.dev);
"at devno %04X, subchannel set %x\n",
sch->schib.pmcw.dev, sch->schid.ssid);
return -ENODEV;
}
sch->opm = 0xff;
chsc_validate_chpids(sch);
if (!cio_is_console(sch->schid))
chsc_validate_chpids(sch);
sch->lpm = sch->schib.pmcw.pim &
sch->schib.pmcw.pam &
sch->schib.pmcw.pom &
sch->opm;
CIO_DEBUG(KERN_INFO, 0,
"Detected device %04X on subchannel %04X"
"Detected device %04x on subchannel 0.%x.%04X"
" - PIM = %02X, PAM = %02X, POM = %02X\n",
sch->schib.pmcw.dev, sch->schid.sch_no, sch->schib.pmcw.pim,
sch->schib.pmcw.dev, sch->schid.ssid,
sch->schid.sch_no, sch->schib.pmcw.pim,
sch->schib.pmcw.pam, sch->schib.pmcw.pom);
/*
@ -693,7 +700,7 @@ wait_cons_dev (void)
static int
cio_test_for_console(struct subchannel_id schid, void *data)
{
if (stsch(schid, &console_subchannel.schib) != 0)
if (stsch_err(schid, &console_subchannel.schib) != 0)
return -ENXIO;
if (console_subchannel.schib.pmcw.dnv &&
console_subchannel.schib.pmcw.dev ==
@ -841,7 +848,7 @@ __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
{
struct schib schib;
if (stsch(schid, &schib))
if (stsch_err(schid, &schib))
return -ENXIO;
if (!schib.pmcw.ena)
return 0;

44
drivers/s390/cio/css.c
View File

@ -1,7 +1,7 @@
/*
* drivers/s390/cio/css.c
* driver for channel subsystem
* $Revision: 1.85 $
* $Revision: 1.93 $
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
@ -23,6 +23,7 @@
int need_rescan = 0;
int css_init_done = 0;
static int max_ssid = 0;
struct channel_subsystem *css[__MAX_CSSID + 1];
@ -37,10 +38,13 @@ for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *data)
init_subchannel_id(&schid);
ret = -ENODEV;
do {
ret = fn(schid, data);
if (ret)
break;
} while (schid.sch_no++ < __MAX_SUBCHANNEL);
do {
ret = fn(schid, data);
if (ret)
break;
} while (schid.sch_no++ < __MAX_SUBCHANNEL);
schid.sch_no = 0;
} while (schid.ssid++ < max_ssid);
return ret;
}
@ -205,8 +209,8 @@ css_evaluate_subchannel(struct subchannel_id schid, int slow)
return -EAGAIN; /* Will be done on the slow path. */
}
event = css_get_subchannel_status(sch, schid);
CIO_MSG_EVENT(4, "Evaluating schid %04x, event %d, %s, %s path.\n",
schid.sch_no, event,
CIO_MSG_EVENT(4, "Evaluating schid 0.%x.%04x, event %d, %s, %s path.\n",
schid.ssid, schid.sch_no, event,
sch?(disc?"disconnected":"normal"):"unknown",
slow?"slow":"fast");
switch (event) {
@ -352,19 +356,23 @@ css_reiterate_subchannels(void)
* Called from the machine check handler for subchannel report words.
*/
int
css_process_crw(int irq)
css_process_crw(int rsid1, int rsid2)
{
int ret;
struct subchannel_id mchk_schid;
CIO_CRW_EVENT(2, "source is subchannel %04X\n", irq);
CIO_CRW_EVENT(2, "source is subchannel %04X, subsystem id %x\n",
rsid1, rsid2);
if (need_rescan)
/* We need to iterate all subchannels anyway. */
return -EAGAIN;
init_subchannel_id(&mchk_schid);
mchk_schid.sch_no = irq;
mchk_schid.sch_no = rsid1;
if (rsid2 != 0)
mchk_schid.ssid = (rsid2 >> 8) & 3;
/*
* Since we are always presented with IPI in the CRW, we have to
* use stsch() to find out if the subchannel in question has come
@ -465,12 +473,23 @@ init_channel_subsystem (void)
if ((ret = bus_register(&css_bus_type)))
goto out;
/* Try to enable MSS. */
ret = chsc_enable_facility(CHSC_SDA_OC_MSS);
switch (ret) {
case 0: /* Success. */
max_ssid = __MAX_SSID;
break;
case -ENOMEM:
goto out_bus;
default:
max_ssid = 0;
}
/* Setup css structure. */
for (i = 0; i <= __MAX_CSSID; i++) {
css[i] = kmalloc(sizeof(struct channel_subsystem), GFP_KERNEL);
if (!css[i]) {
ret = -ENOMEM;
goto out_bus;
goto out_unregister;
}
setup_css(i);
ret = device_register(&css[i]->device);
@ -485,11 +504,12 @@ init_channel_subsystem (void)
return 0;
out_free:
kfree(css[i]);
out_bus:
out_unregister:
while (i > 0) {
i--;
device_unregister(&css[i]->device);
}
out_bus:
bus_unregister(&css_bus_type);
out:
return ret;

2
drivers/s390/cio/css.h
View File

@ -77,6 +77,7 @@ struct ccw_device_private {
unsigned long registered;
__u16 devno; /* device number */
__u16 sch_no; /* subchannel number */
__u8 ssid; /* subchannel set id */
__u8 imask; /* lpm mask for SNID/SID/SPGID */
int iretry; /* retry counter SNID/SID/SPGID */
struct {
@ -135,6 +136,7 @@ extern int css_init_done;
extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3
#define __MAX_CHPID 255
#define __MAX_CSSID 0

22
drivers/s390/cio/device.c
View File

@ -535,7 +535,8 @@ ccw_device_register(struct ccw_device *cdev)
}
struct match_data {
unsigned int devno;
unsigned int devno;
unsigned int ssid;
struct ccw_device * sibling;
};
@ -548,6 +549,7 @@ match_devno(struct device * dev, void * data)
cdev = to_ccwdev(dev);
if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
(cdev->private->devno == d->devno) &&
(cdev->private->ssid == d->ssid) &&
(cdev != d->sibling)) {
cdev->private->state = DEV_STATE_NOT_OPER;
return 1;
@ -556,11 +558,13 @@ match_devno(struct device * dev, void * data)
}
static struct ccw_device *
get_disc_ccwdev_by_devno(unsigned int devno, struct ccw_device *sibling)
get_disc_ccwdev_by_devno(unsigned int devno, unsigned int ssid,
struct ccw_device *sibling)
{
struct device *dev;
struct match_data data = {
.devno = devno,
.devno = devno,
.ssid = ssid,
.sibling = sibling,
};
@ -616,7 +620,7 @@ ccw_device_do_unreg_rereg(void *data)
need_rename = 1;
other_cdev = get_disc_ccwdev_by_devno(sch->schib.pmcw.dev,
cdev);
sch->schid.ssid, cdev);
if (other_cdev) {
struct subchannel *other_sch;
@ -639,8 +643,8 @@ ccw_device_do_unreg_rereg(void *data)
if (test_and_clear_bit(1, &cdev->private->registered))
device_del(&cdev->dev);
if (need_rename)
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
sch->schib.pmcw.dev);
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_add_changed, (void *)cdev);
queue_work(ccw_device_work, &cdev->private->kick_work);
@ -769,9 +773,11 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
sch->dev.driver_data = cdev;
sch->driver = &io_subchannel_driver;
cdev->ccwlock = &sch->lock;
/* Init private data. */
priv = cdev->private;
priv->devno = sch->schib.pmcw.dev;
priv->ssid = sch->schid.ssid;
priv->sch_no = sch->schid.sch_no;
priv->state = DEV_STATE_NOT_OPER;
INIT_LIST_HEAD(&priv->cmb_list);
@ -779,8 +785,8 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
init_timer(&priv->timer);
/* Set an initial name for the device. */
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
sch->schib.pmcw.dev);
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
/* Increase counter of devices currently in recognition. */
atomic_inc(&ccw_device_init_count);

15
drivers/s390/cio/device_fsm.c
View File

@ -257,8 +257,9 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
switch (state) {
case DEV_STATE_NOT_OPER:
CIO_DEBUG(KERN_WARNING, 2,
"SenseID : unknown device %04x on subchannel %04x\n",
cdev->private->devno, sch->schid.sch_no);
"SenseID : unknown device %04x on subchannel "
"0.%x.%04x\n", cdev->private->devno,
sch->schid.ssid, sch->schid.sch_no);
break;
case DEV_STATE_OFFLINE:
if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID) {
@ -282,16 +283,18 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
return;
}
/* Issue device info message. */
CIO_DEBUG(KERN_INFO, 2, "SenseID : device %04x reports: "
CIO_DEBUG(KERN_INFO, 2, "SenseID : device 0.%x.%04x reports: "
"CU Type/Mod = %04X/%02X, Dev Type/Mod = "
"%04X/%02X\n", cdev->private->devno,
"%04X/%02X\n",
cdev->private->ssid, cdev->private->devno,
cdev->id.cu_type, cdev->id.cu_model,
cdev->id.dev_type, cdev->id.dev_model);
break;
case DEV_STATE_BOXED:
CIO_DEBUG(KERN_WARNING, 2,
"SenseID : boxed device %04x on subchannel %04x\n",
cdev->private->devno, sch->schid.sch_no);
"SenseID : boxed device %04x on subchannel "
"0.%x.%04x\n", cdev->private->devno,
sch->schid.ssid, sch->schid.sch_no);
break;
}
cdev->private->state = state;

22
drivers/s390/cio/device_id.c
View File

@ -256,16 +256,17 @@ ccw_device_check_sense_id(struct ccw_device *cdev)
* sense id information. So, for intervention required,
* we use the "whack it until it talks" strategy...
*/
CIO_MSG_EVENT(2, "SenseID : device %04x on Subchannel %04x "
"reports cmd reject\n",
cdev->private->devno, sch->schid.sch_no);
CIO_MSG_EVENT(2, "SenseID : device %04x on Subchannel "
"0.%x.%04x reports cmd reject\n",
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no);
return -EOPNOTSUPP;
}
if (irb->esw.esw0.erw.cons) {
CIO_MSG_EVENT(2, "SenseID : UC on dev %04x, "
CIO_MSG_EVENT(2, "SenseID : UC on dev 0.%x.%04x, "
"lpum %02X, cnt %02d, sns :"
" %02X%02X%02X%02X %02X%02X%02X%02X ...\n",
cdev->private->devno,
cdev->private->ssid, cdev->private->devno,
irb->esw.esw0.sublog.lpum,
irb->esw.esw0.erw.scnt,
irb->ecw[0], irb->ecw[1],
@ -277,16 +278,17 @@ ccw_device_check_sense_id(struct ccw_device *cdev)
if (irb->scsw.cc == 3) {
if ((sch->orb.lpm &
sch->schib.pmcw.pim & sch->schib.pmcw.pam) != 0)
CIO_MSG_EVENT(2, "SenseID : path %02X for device %04x on"
" subchannel %04x is 'not operational'\n",
sch->orb.lpm, cdev->private->devno,
CIO_MSG_EVENT(2, "SenseID : path %02X for device %04x "
"on subchannel 0.%x.%04x is "
"'not operational'\n", sch->orb.lpm,
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no);
return -EACCES;
}
/* Hmm, whatever happened, try again. */
CIO_MSG_EVENT(2, "SenseID : start_IO() for device %04x on "
"subchannel %04x returns status %02X%02X\n",
cdev->private->devno, sch->schid.sch_no,
"subchannel 0.%x.%04x returns status %02X%02X\n",
cdev->private->devno, sch->schid.ssid, sch->schid.sch_no,
irb->scsw.dstat, irb->scsw.cstat);
return -EAGAIN;
}

40
drivers/s390/cio/device_pgid.c
View File

@ -57,10 +57,10 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev)
if (ret != -EACCES)
return ret;
CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel "
"%04x, lpm %02X, became 'not "
"0.%x.%04x, lpm %02X, became 'not "
"operational'\n",
cdev->private->devno, sch->schid.sch_no,
cdev->private->imask);
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no, cdev->private->imask);
}
cdev->private->imask >>= 1;
@ -106,10 +106,10 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev)
return -EOPNOTSUPP;
}
if (irb->esw.esw0.erw.cons) {
CIO_MSG_EVENT(2, "SNID - device %04x, unit check, "
CIO_MSG_EVENT(2, "SNID - device 0.%x.%04x, unit check, "
"lpum %02X, cnt %02d, sns : "
"%02X%02X%02X%02X %02X%02X%02X%02X ...\n",
cdev->private->devno,
cdev->private->ssid, cdev->private->devno,
irb->esw.esw0.sublog.lpum,
irb->esw.esw0.erw.scnt,
irb->ecw[0], irb->ecw[1],
@ -119,16 +119,17 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev)
return -EAGAIN;
}
if (irb->scsw.cc == 3) {
CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel "
"%04x, lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.sch_no,
sch->orb.lpm);
CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x,"
" lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no, sch->orb.lpm);
return -EACCES;
}
if (cdev->private->pgid.inf.ps.state2 == SNID_STATE2_RESVD_ELSE) {
CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel %04x "
CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x "
"is reserved by someone else\n",
cdev->private->devno, sch->schid.sch_no);
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no);
return -EUSERS;
}
return 0;
@ -237,8 +238,9 @@ __ccw_device_do_pgid(struct ccw_device *cdev, __u8 func)
sch->lpm &= ~cdev->private->imask;
sch->vpm &= ~cdev->private->imask;
CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel "
"%04x, lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.sch_no, cdev->private->imask);
"0.%x.%04x, lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no, cdev->private->imask);
return ret;
}
@ -260,8 +262,10 @@ __ccw_device_check_pgid(struct ccw_device *cdev)
if (irb->ecw[0] & SNS0_CMD_REJECT)
return -EOPNOTSUPP;
/* Hmm, whatever happened, try again. */
CIO_MSG_EVENT(2, "SPID - device %04x, unit check, cnt %02d, "
CIO_MSG_EVENT(2, "SPID - device 0.%x.%04x, unit check, "
"cnt %02d, "
"sns : %02X%02X%02X%02X %02X%02X%02X%02X ...\n",
cdev->private->ssid,
cdev->private->devno, irb->esw.esw0.erw.scnt,
irb->ecw[0], irb->ecw[1],
irb->ecw[2], irb->ecw[3],
@ -270,10 +274,10 @@ __ccw_device_check_pgid(struct ccw_device *cdev)
return -EAGAIN;
}
if (irb->scsw.cc == 3) {
CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel "
"%04x, lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.sch_no,
cdev->private->imask);
CIO_MSG_EVENT(2, "SPID - Device %04x on Subchannel 0.%x.%04x,"
" lpm %02X, became 'not operational'\n",
cdev->private->devno, sch->schid.ssid,
sch->schid.sch_no, cdev->private->imask);
return -EACCES;
}
return 0;

10
drivers/s390/cio/device_status.c
View File

@ -36,9 +36,10 @@ ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb)
CIO_MSG_EVENT(0, "Channel-Check or Interface-Control-Check "
"received"
" ... device %04X on subchannel %04X, dev_stat "
" ... device %04x on subchannel 0.%x.%04x, dev_stat "
": %02X sch_stat : %02X\n",
cdev->private->devno, cdev->private->sch_no,
cdev->private->devno, cdev->private->ssid,
cdev->private->sch_no,
irb->scsw.dstat, irb->scsw.cstat);
if (irb->scsw.cc != 3) {
@ -61,8 +62,9 @@ ccw_device_path_notoper(struct ccw_device *cdev)
sch = to_subchannel(cdev->dev.parent);
stsch (sch->schid, &sch->schib);
CIO_MSG_EVENT(0, "%s(%04x) - path(s) %02x are "
"not operational \n", __FUNCTION__, sch->schid.sch_no,
CIO_MSG_EVENT(0, "%s(0.%x.%04x) - path(s) %02x are "
"not operational \n", __FUNCTION__,
sch->schid.ssid, sch->schid.sch_no,
sch->schib.pmcw.pnom);
sch->lpm &= ~sch->schib.pmcw.pnom;

29
drivers/s390/cio/ioasm.h
View File

@ -38,6 +38,35 @@ static inline int stsch(struct subchannel_id schid,
return ccode;
}
static inline int stsch_err(struct subchannel_id schid,
volatile struct schib *addr)
{
int ccode;
__asm__ __volatile__(
" lhi %0,%3\n"
" lr 1,%1\n"
" stsch 0(%2)\n"
"0: ipm %0\n"
" srl %0,28\n"
"1:\n"
#ifdef CONFIG_ARCH_S390X
".section __ex_table,\"a\"\n"
" .align 8\n"
" .quad 0b,1b\n"
".previous"
#else
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 0b,1b\n"
".previous"
#endif
: "=&d" (ccode)
: "d" (schid), "a" (addr), "K" (-EIO), "m" (*addr)
: "cc", "1" );
return ccode;
}
static inline int msch(struct subchannel_id schid,
volatile struct schib *addr)
{

81
drivers/s390/cio/qdio.c
View File

@ -56,7 +56,7 @@
#include "ioasm.h"
#include "chsc.h"
#define VERSION_QDIO_C "$Revision: 1.113 $"
#define VERSION_QDIO_C "$Revision: 1.114 $"
/****************** MODULE PARAMETER VARIABLES ********************/
MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
@ -2066,21 +2066,22 @@ qdio_timeout_handler(struct ccw_device *cdev)
switch (irq_ptr->state) {
case QDIO_IRQ_STATE_INACTIVE:
QDIO_PRINT_ERR("establish queues on irq %04x: timed out\n",
irq_ptr->schid.sch_no);
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
QDIO_DBF_TEXT2(1,setup,"eq:timeo");
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
break;
case QDIO_IRQ_STATE_CLEANUP:
QDIO_PRINT_INFO("Did not get interrupt on cleanup, irq=0x%x.\n",
irq_ptr->schid.sch_no);
QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
"irq=0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
break;
case QDIO_IRQ_STATE_ESTABLISHED:
case QDIO_IRQ_STATE_ACTIVE:
/* I/O has been terminated by common I/O layer. */
QDIO_PRINT_INFO("Queues on irq %04x killed by cio.\n",
irq_ptr->schid.sch_no);
QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
QDIO_DBF_TEXT2(1, trace, "cio:term");
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
if (get_device(&cdev->dev)) {
@ -2273,7 +2274,9 @@ qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
unsigned char qdioac;
struct {
struct chsc_header request;
u16 reserved1;
u16 reserved1:10;
u16 ssid:2;
u16 fmt:4;
u16 first_sch;
u16 reserved2;
u16 last_sch;
@ -2318,12 +2321,13 @@ qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
};
ssqd_area->first_sch = irq_ptr->schid.sch_no;
ssqd_area->last_sch = irq_ptr->schid.sch_no;
ssqd_area->ssid = irq_ptr->schid.ssid;
result = chsc(ssqd_area);
if (result) {
QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
"SIGAs for sch x%x.\n",
result, irq_ptr->schid.sch_no);
"SIGAs for sch 0.%x.%x.\n", result,
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
@ -2333,8 +2337,9 @@ qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon checking SIGA needs " \
"is 0x%x. Using all SIGAs for sch x%x.\n",
ssqd_area->response.code, irq_ptr->schid.sch_no);
"is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
ssqd_area->response.code,
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
@ -2344,8 +2349,9 @@ qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
!(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
(ssqd_area->sch != irq_ptr->schid.sch_no)) {
QDIO_PRINT_WARN("huh? problems checking out sch x%x... " \
"using all SIGAs.\n",irq_ptr->schid.sch_no);
QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
"using all SIGAs.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
@ -2453,7 +2459,8 @@ tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scssc_area) {
QDIO_PRINT_WARN("No memory for setting indicators on " \
"subchannel x%x.\n", irq_ptr->schid.sch_no);
"subchannel 0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
return -ENOMEM;
}
scssc_area->request = (struct chsc_header) {
@ -2479,8 +2486,9 @@ tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
result = chsc(scssc_area);
if (result) {
QDIO_PRINT_WARN("could not set indicators on irq x%x, " \
"cc=%i.\n",irq_ptr->schid.sch_no,result);
QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
"cc=%i.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
result = -EIO;
goto out;
}
@ -2536,7 +2544,8 @@ tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scsscf_area) {
QDIO_PRINT_WARN("No memory for setting delay target on " \
"subchannel x%x.\n", irq_ptr->schid.sch_no);
"subchannel 0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
return -ENOMEM;
}
scsscf_area->request = (struct chsc_header) {
@ -2548,8 +2557,9 @@ tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
result=chsc(scsscf_area);
if (result) {
QDIO_PRINT_WARN("could not set delay target on irq x%x, " \
"cc=%i. Continuing.\n",irq_ptr->schid.sch_no,
QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
"cc=%i. Continuing.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
result);
result = -EIO;
goto out;
@ -2870,8 +2880,9 @@ qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
QDIO_PRINT_ERR("received check condition on establish " \
"queues on irq 0x%x (cs=x%x, ds=x%x).\n",
irq_ptr->schid.sch_no,cstat,dstat);
"queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
cstat,dstat);
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
}
@ -2879,9 +2890,10 @@ qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
QDIO_DBF_TEXT2(1,setup,"eq:no de");
QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
QDIO_PRINT_ERR("establish queues on irq %04x: didn't get "
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
"device end: dstat=%02x, cstat=%02x\n",
irq_ptr->schid.sch_no, dstat, cstat);
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
dstat, cstat);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
return 1;
}
@ -2890,9 +2902,9 @@ qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
QDIO_DBF_TEXT2(1,setup,"eq:badio");
QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
QDIO_PRINT_ERR("establish queues on irq %04x: got "
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
"the following devstat: dstat=%02x, "
"cstat=%02x\n",
"cstat=%02x\n", irq_ptr->schid.ssid,
irq_ptr->schid.sch_no, dstat, cstat);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
return 1;
@ -3041,7 +3053,8 @@ int qdio_fill_irq(struct qdio_initialize *init_data)
QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
if (!irq_ptr->dev_st_chg_ind) {
QDIO_PRINT_WARN("no indicator location available " \
"for irq 0x%x\n",irq_ptr->schid.sch_no);
"for irq 0.%x.%x\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdio_release_irq_memory(irq_ptr);
return -ENOBUFS;
}
@ -3198,9 +3211,10 @@ qdio_establish(struct qdio_initialize *init_data)
sprintf(dbf_text,"eq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
}
QDIO_PRINT_WARN("establish queues on irq %04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->schid.sch_no,result,result2);
QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
result, result2);
result=result2;
if (result)
ccw_device_set_timeout(cdev, 0);
@ -3298,9 +3312,10 @@ qdio_activate(struct ccw_device *cdev, int flags)
sprintf(dbf_text,"aq:io%4x",result);
QDIO_DBF_TEXT2(1,setup,dbf_text);
}
QDIO_PRINT_WARN("activate queues on irq %04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->schid.sch_no,result,result2);
QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
"returned %i, next try returned %i\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
result, result2);
result=result2;
}

3
drivers/s390/cio/schid.h
View File

@ -2,7 +2,8 @@
#define S390_SCHID_H
struct subchannel_id {
__u32 reserved:15;
__u32 reserved:13;
__u32 ssid:2;
__u32 one:1;
__u32 sch_no:16;
} __attribute__ ((packed,aligned(4)));

56
drivers/s390/s390mach.c
View File

@ -23,7 +23,7 @@
static struct semaphore m_sem;
extern int css_process_crw(int);
extern int css_process_crw(int, int);
extern int chsc_process_crw(void);
extern int chp_process_crw(int, int);
extern void css_reiterate_subchannels(void);
@ -49,9 +49,10 @@ s390_handle_damage(char *msg)
static int
s390_collect_crw_info(void *param)
{
struct crw crw;
struct crw crw[2];
int ccode, ret, slow;
struct semaphore *sem;
unsigned int chain;
sem = (struct semaphore *)param;
/* Set a nice name. */
@ -59,25 +60,50 @@ s390_collect_crw_info(void *param)
repeat:
down_interruptible(sem);
slow = 0;
chain = 0;
while (1) {
ccode = stcrw(&crw);
if (unlikely(chain > 1)) {
struct crw tmp_crw;
printk(KERN_WARNING"%s: Code does not support more "
"than two chained crws; please report to "
"linux390@de.ibm.com!\n", __FUNCTION__);
ccode = stcrw(&tmp_crw);
printk(KERN_WARNING"%s: crw reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
__FUNCTION__, tmp_crw.slct, tmp_crw.oflw,
tmp_crw.chn, tmp_crw.rsc, tmp_crw.anc,
tmp_crw.erc, tmp_crw.rsid);
printk(KERN_WARNING"%s: This was crw number %x in the "
"chain\n", __FUNCTION__, chain);
if (ccode != 0)
break;
chain = tmp_crw.chn ? chain + 1 : 0;
continue;
}
ccode = stcrw(&crw[chain]);
if (ccode != 0)
break;
DBG(KERN_DEBUG "crw_info : CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw.slct, crw.oflw, crw.chn, crw.rsc, crw.anc,
crw.erc, crw.rsid);
crw[chain].slct, crw[chain].oflw, crw[chain].chn,
crw[chain].rsc, crw[chain].anc, crw[chain].erc,
crw[chain].rsid);
/* Check for overflows. */
if (crw.oflw) {
if (crw[chain].oflw) {
pr_debug("%s: crw overflow detected!\n", __FUNCTION__);
css_reiterate_subchannels();
chain = 0;
slow = 1;
continue;
}
switch (crw.rsc) {
switch (crw[chain].rsc) {
case CRW_RSC_SCH:
pr_debug("source is subchannel %04X\n", crw.rsid);
ret = css_process_crw (crw.rsid);
if (crw[0].chn && !chain)
break;
pr_debug("source is subchannel %04X\n", crw[0].rsid);
ret = css_process_crw (crw[0].rsid,
chain ? crw[1].rsid : 0);
if (ret == -EAGAIN)
slow = 1;
break;
@ -85,18 +111,18 @@ repeat:
pr_debug("source is monitoring facility\n");
break;
case CRW_RSC_CPATH:
pr_debug("source is channel path %02X\n", crw.rsid);
switch (crw.erc) {
pr_debug("source is channel path %02X\n", crw[0].rsid);
switch (crw[0].erc) {
case CRW_ERC_IPARM: /* Path has come. */
ret = chp_process_crw(crw.rsid, 1);
ret = chp_process_crw(crw[0].rsid, 1);
break;
case CRW_ERC_PERRI: /* Path has gone. */
case CRW_ERC_PERRN:
ret = chp_process_crw(crw.rsid, 0);
ret = chp_process_crw(crw[0].rsid, 0);
break;
default:
pr_debug("Don't know how to handle erc=%x\n",
crw.erc);
crw[0].erc);
ret = 0;
}
if (ret == -EAGAIN)
@ -115,6 +141,8 @@ repeat:
pr_debug("unknown source\n");
break;
}
/* chain is always 0 or 1 here. */
chain = crw[chain].chn ? chain + 1 : 0;
}
if (slow)
queue_work(slow_path_wq, &slow_path_work);