Commit f86635fa authored by Peter Oberparleiter's avatar Peter Oberparleiter Committed by Martin Schwidefsky
Browse files

[S390] cio: Introduce struct chp_id.



Introduce data type for channel-path IDs.

Signed-off-by: default avatarPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent 6fc321fd
/*
* drivers/s390/cio/chpid.h
*
* Copyright IBM Corp. 2007
* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#ifndef S390_CHP_ID_H
#define S390_CHP_ID_H S390_CHP_ID_H
#include <linux/string.h>
#include <asm/types.h>
#include "css.h"
struct chp_id {
u8 reserved1;
u8 cssid;
u8 reserved2;
u8 id;
} __attribute__((packed));
static inline void chp_id_init(struct chp_id *chpid)
{
memset(chpid, 0, sizeof(struct chp_id));
}
static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
{
return (a->id == b->id) && (a->cssid == b->cssid);
}
static inline void chp_id_next(struct chp_id *chpid)
{
if (chpid->id < __MAX_CHPID)
chpid->id++;
else {
chpid->id = 0;
chpid->cssid++;
}
}
static inline int chp_id_is_valid(struct chp_id *chpid)
{
return (chpid->cssid <= __MAX_CSSID);
}
#define chp_id_for_each(c) \
for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
#endif /* S390_CHP_ID_H */
......@@ -20,43 +20,48 @@
#include "cio.h"
#include "cio_debug.h"
#include "ioasm.h"
#include "chpid.h"
#include "chsc.h"
static void *sei_page;
static int new_channel_path(int chpid);
static int new_channel_path(struct chp_id chpid);
static inline void
set_chp_logically_online(int chp, int onoff)
static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
{
css[0]->chps[chp]->state = onoff;
return css[chpid.cssid]->chps[chpid.id];
}
static int
get_chp_status(int chp)
static void set_chp_logically_online(struct chp_id chpid, int onoff)
{
return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV);
chpid_to_chp(chpid)->state = onoff;
}
void
chsc_validate_chpids(struct subchannel *sch)
static int get_chp_status(struct chp_id chpid)
{
return (chpid_to_chp(chpid) ? chpid_to_chp(chpid)->state : -ENODEV);
}
void chsc_validate_chpids(struct subchannel *sch)
{
int mask, chp;
struct chp_id chpid;
chp_id_init(&chpid);
for (chp = 0; chp <= 7; chp++) {
mask = 0x80 >> chp;
if (!get_chp_status(sch->schib.pmcw.chpid[chp]))
chpid.id = sch->schib.pmcw.chpid[chp];
if (!get_chp_status(chpid))
/* disable using this path */
sch->opm &= ~mask;
}
}
void
chpid_is_actually_online(int chp)
void chpid_is_actually_online(struct chp_id chpid)
{
int state;
state = get_chp_status(chp);
state = get_chp_status(chpid);
if (state < 0) {
need_rescan = 1;
queue_work(slow_path_wq, &slow_path_work);
......@@ -200,11 +205,14 @@ css_get_ssd_info(struct subchannel *sch)
spin_unlock_irq(sch->lock);
free_page((unsigned long)page);
if (!ret) {
int j, chpid, mask;
int j, mask;
struct chp_id chpid;
chp_id_init(&chpid);
/* Allocate channel path structures, if needed. */
for (j = 0; j < 8; j++) {
mask = 0x80 >> j;
chpid = sch->ssd_info.chpid[j];
chpid.id = sch->ssd_info.chpid[j];
if ((sch->schib.pmcw.pim & mask) &&
(get_chp_status(chpid) < 0))
new_channel_path(chpid);
......@@ -227,7 +235,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
for (j = 0; j < 8; j++) {
mask = 0x80 >> j;
if ((sch->schib.pmcw.pim & mask) &&
(sch->schib.pmcw.chpid[j] == chpid->id))
(sch->schib.pmcw.chpid[j] == chpid->chpid.id))
break;
}
if (j >= 8)
......@@ -277,18 +285,17 @@ out_unreg:
return 0;
}
static void
s390_set_chpid_offline( __u8 chpid)
static void s390_set_chpid_offline(struct chp_id chpid)
{
char dbf_txt[15];
struct device *dev;
sprintf(dbf_txt, "chpr%x", chpid);
sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
CIO_TRACE_EVENT(2, dbf_txt);
if (get_chp_status(chpid) <= 0)
return;
dev = get_device(&css[0]->chps[chpid]->dev);
dev = get_device(&(chpid_to_chp(chpid)->dev));
bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev),
s390_subchannel_remove_chpid);
......@@ -316,7 +323,7 @@ s390_process_res_acc_sch(struct res_acc_data *res_data, struct subchannel *sch)
* check if chpid is in information updated by ssd
*/
if (sch->ssd_info.valid &&
sch->ssd_info.chpid[chp] == res_data->chp->id &&
sch->ssd_info.chpid[chp] == res_data->chp->chpid.id &&
(sch->ssd_info.fla[chp] & res_data->fla_mask)
== res_data->fla) {
found = 1;
......@@ -409,7 +416,8 @@ s390_process_res_acc (struct res_acc_data *res_data)
int rc;
char dbf_txt[15];
sprintf(dbf_txt, "accpr%x", res_data->chp->id);
sprintf(dbf_txt, "accpr%x.%02x", res_data->chp->chpid.cssid,
res_data->chp->chpid.id);
CIO_TRACE_EVENT( 2, dbf_txt);
if (res_data->fla != 0) {
sprintf(dbf_txt, "fla%x", res_data->fla);
......@@ -482,17 +490,21 @@ struct chsc_sei_area {
static int chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
{
int chpid;
struct chp_id chpid;
int id;
CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
sei_area->rs, sei_area->rsid);
if (sei_area->rs != 4)
return 0;
chpid = __get_chpid_from_lir(sei_area->ccdf);
if (chpid < 0)
id = __get_chpid_from_lir(sei_area->ccdf);
if (id < 0)
CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
else
else {
chp_id_init(&chpid);
chpid.id = id;
s390_set_chpid_offline(chpid);
}
return 0;
}
......@@ -501,6 +513,7 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
{
struct res_acc_data res_data;
struct device *dev;
struct chp_id chpid;
int status;
int rc;
......@@ -508,13 +521,15 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
"rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
if (sei_area->rs != 4)
return 0;
chp_id_init(&chpid);
chpid.id = sei_area->rsid;
/* allocate a new channel path structure, if needed */
status = get_chp_status(sei_area->rsid);
status = get_chp_status(chpid);
if (status < 0)
new_channel_path(sei_area->rsid);
new_channel_path(chpid);
else if (!status)
return 0;
dev = get_device(&css[0]->chps[sei_area->rsid]->dev);
dev = get_device(&(chpid_to_chp(chpid)->dev));
memset(&res_data, 0, sizeof(struct res_acc_data));
res_data.chp = to_channelpath(dev);
if ((sei_area->vf & 0xc0) != 0) {
......@@ -631,7 +646,7 @@ __chp_add(struct subchannel_id schid, void *data)
for (i=0; i<8; i++) {
mask = 0x80 >> i;
if ((sch->schib.pmcw.pim & mask) &&
(sch->schib.pmcw.chpid[i] == chp->id)) {
(sch->schib.pmcw.chpid[i] == chp->chpid.id)) {
if (stsch(sch->schid, &sch->schib) != 0) {
/* Endgame. */
spin_unlock_irq(sch->lock);
......@@ -657,8 +672,7 @@ __chp_add(struct subchannel_id schid, void *data)
return 0;
}
static int
chp_add(int chpid)
static int chp_add(struct chp_id chpid)
{
int rc;
char dbf_txt[15];
......@@ -667,10 +681,10 @@ chp_add(int chpid)
if (!get_chp_status(chpid))
return 0; /* no need to do the rest */
sprintf(dbf_txt, "cadd%x", chpid);
sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
CIO_TRACE_EVENT(2, dbf_txt);
dev = get_device(&css[0]->chps[chpid]->dev);
dev = get_device(&(chpid_to_chp(chpid)->dev));
rc = for_each_subchannel(__chp_add, to_channelpath(dev));
if (css_slow_subchannels_exist())
rc = -EAGAIN;
......@@ -683,9 +697,12 @@ chp_add(int chpid)
/*
* Handling of crw machine checks with channel path source.
*/
int
chp_process_crw(int chpid, int on)
int chp_process_crw(int id, int on)
{
struct chp_id chpid;
chp_id_init(&chpid);
chpid.id = id;
if (on == 0) {
/* Path has gone. We use the link incident routine.*/
s390_set_chpid_offline(chpid);
......@@ -733,8 +750,8 @@ static void terminate_internal_io(struct subchannel *sch)
sch->driver->termination(&sch->dev);
}
static void
__s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
static void __s390_subchannel_vary_chpid(struct subchannel *sch,
struct chp_id chpid, int on)
{
int chp, old_lpm;
unsigned long flags;
......@@ -745,7 +762,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
spin_lock_irqsave(sch->lock, flags);
old_lpm = sch->lpm;
for (chp = 0; chp < 8; chp++) {
if (sch->ssd_info.chpid[chp] != chpid)
if (sch->ssd_info.chpid[chp] != chpid.id)
continue;
if (on) {
......@@ -780,11 +797,10 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
spin_unlock_irqrestore(sch->lock, flags);
}
static int
s390_subchannel_vary_chpid_off(struct device *dev, void *data)
static int s390_subchannel_vary_chpid_off(struct device *dev, void *data)
{
struct subchannel *sch;
__u8 *chpid;
struct chp_id *chpid;
sch = to_subchannel(dev);
chpid = data;
......@@ -793,11 +809,10 @@ s390_subchannel_vary_chpid_off(struct device *dev, void *data)
return 0;
}
static int
s390_subchannel_vary_chpid_on(struct device *dev, void *data)
static int s390_subchannel_vary_chpid_on(struct device *dev, void *data)
{
struct subchannel *sch;
__u8 *chpid;
struct chp_id *chpid;
sch = to_subchannel(dev);
chpid = data;
......@@ -833,23 +848,25 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
* Function: s390_vary_chpid
* Varies the specified chpid online or offline
*/
static int
s390_vary_chpid( __u8 chpid, int on)
static int s390_vary_chpid(struct chp_id chpid, int on)
{
char dbf_text[15];
int status;
sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid);
sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid,
chpid.id);
CIO_TRACE_EVENT( 2, dbf_text);
status = get_chp_status(chpid);
if (status < 0) {
printk(KERN_ERR "Can't vary unknown chpid %02X\n", chpid);
printk(KERN_ERR "Can't vary unknown chpid %x.%02x\n",
chpid.cssid, chpid.id);
return -EINVAL;
}
if (!on && !status) {
printk(KERN_ERR "chpid %x is already offline\n", chpid);
printk(KERN_ERR "chpid %x.%02x is already offline\n",
chpid.cssid, chpid.id);
return -EINVAL;
}
......@@ -904,20 +921,19 @@ static struct bin_attribute chp_measurement_chars_attr = {
.read = chp_measurement_chars_read,
};
static void
chp_measurement_copy_block(struct cmg_entry *buf,
struct channel_subsystem *css, int chpid)
static void chp_measurement_copy_block(struct cmg_entry *buf,
struct channel_subsystem *css, struct chp_id chpid)
{
void *area;
struct cmg_entry *entry, reference_buf;
int idx;
if (chpid < 128) {
if (chpid.id < 128) {
area = css->cub_addr1;
idx = chpid;
idx = chpid.id;
} else {
area = css->cub_addr2;
idx = chpid - 128;
idx = chpid.id - 128;
}
entry = area + (idx * sizeof(struct cmg_entry));
do {
......@@ -941,7 +957,7 @@ chp_measurement_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
/* Only allow single reads. */
if (off || count < size)
return 0;
chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id);
chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid);
count = size;
return count;
}
......@@ -1137,7 +1153,7 @@ chp_status_show(struct device *dev, struct device_attribute *attr, char *buf)
if (!chp)
return 0;
return (get_chp_status(chp->id) ? sprintf(buf, "online\n") :
return (get_chp_status(chp->chpid) ? sprintf(buf, "online\n") :
sprintf(buf, "offline\n"));
}
......@@ -1154,9 +1170,9 @@ chp_status_write(struct device *dev, struct device_attribute *attr, const char *
return count;
if (!strnicmp(cmd, "on", 2))
error = s390_vary_chpid(cp->id, 1);
error = s390_vary_chpid(cp->chpid, 1);
else if (!strnicmp(cmd, "off", 3))
error = s390_vary_chpid(cp->id, 0);
error = s390_vary_chpid(cp->chpid, 0);
else
error = -EINVAL;
......@@ -1227,9 +1243,8 @@ chp_release(struct device *dev)
kfree(cp);
}
static int
chsc_determine_channel_path_description(int chpid,
struct channel_path_desc *desc)
static int chsc_determine_channel_path_description(struct chp_id chpid,
struct channel_path_desc *desc)
{
int ccode, ret;
......@@ -1252,8 +1267,8 @@ chsc_determine_channel_path_description(int chpid,
scpd_area->request.length = 0x0010;
scpd_area->request.code = 0x0002;
scpd_area->first_chpid = chpid;
scpd_area->last_chpid = chpid;
scpd_area->first_chpid = chpid.id;
scpd_area->last_chpid = chpid.id;
ccode = chsc(scpd_area);
if (ccode > 0) {
......@@ -1349,8 +1364,8 @@ chsc_get_channel_measurement_chars(struct channel_path *chp)
scmc_area->request.length = 0x0010;
scmc_area->request.code = 0x0022;
scmc_area->first_chpid = chp->id;
scmc_area->last_chpid = chp->id;
scmc_area->first_chpid = chp->chpid.id;
scmc_area->last_chpid = chp->chpid.id;
ccode = chsc(scmc_area);
if (ccode > 0) {
......@@ -1396,8 +1411,7 @@ out:
* Entries for chpids on the system bus.
* This replaces /proc/chpids.
*/
static int
new_channel_path(int chpid)
static int new_channel_path(struct chp_id chpid)
{
struct channel_path *chp;
int ret;
......@@ -1407,11 +1421,12 @@ new_channel_path(int chpid)
return -ENOMEM;
/* fill in status, etc. */
chp->id = chpid;
chp->chpid = chpid;
chp->state = 1;
chp->dev.parent = &css[0]->device;
chp->dev.parent = &css[chpid.cssid]->device;
chp->dev.release = chp_release;
snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid);
snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp%x.%02x", chpid.cssid,
chpid.id);
/* Obtain channel path description and fill it in. */
ret = chsc_determine_channel_path_description(chpid, &chp->desc);
......@@ -1437,8 +1452,8 @@ new_channel_path(int chpid)
/* make it known to the system */
ret = device_register(&chp->dev);
if (ret) {
printk(KERN_WARNING "%s: could not register %02x\n",
__func__, chpid);
printk(KERN_WARNING "%s: could not register %x.%02x\n",
__func__, chpid.cssid, chpid.id);
goto out_free;
}
ret = sysfs_create_group(&chp->dev.kobj, &chp_attr_group);
......@@ -1446,18 +1461,18 @@ new_channel_path(int chpid)
device_unregister(&chp->dev);
goto out_free;
}
mutex_lock(&css[0]->mutex);
if (css[0]->cm_enabled) {
mutex_lock(&css[chpid.cssid]->mutex);
if (css[chpid.cssid]->cm_enabled) {
ret = chsc_add_chp_cmg_attr(chp);
if (ret) {
sysfs_remove_group(&chp->dev.kobj, &chp_attr_group);
device_unregister(&chp->dev);
mutex_unlock(&css[0]->mutex);
mutex_unlock(&css[chpid.cssid]->mutex);
goto out_free;
}
}
css[0]->chps[chpid] = chp;
mutex_unlock(&css[0]->mutex);
css[chpid.cssid]->chps[chpid.id] = chp;
mutex_unlock(&css[chpid.cssid]->mutex);
return ret;
out_free:
kfree(chp);
......@@ -1469,8 +1484,11 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no)
{
struct channel_path *chp;
struct channel_path_desc *desc;
struct chp_id chpid;
chp = css[0]->chps[sch->schib.pmcw.chpid[chp_no]];
chp_id_init(&chpid);
chpid.id = sch->schib.pmcw.chpid[chp_no];
chp = chpid_to_chp(chpid);
if (!chp)
return NULL;
desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL);
......
#ifndef S390_CHSC_H
#define S390_CHSC_H
#include <linux/types.h>
#include <linux/device.h>
#include "chpid.h"
#define CHSC_SEI_ACC_CHPID 1
#define CHSC_SEI_ACC_LINKADDR 2
#define CHSC_SEI_ACC_FULLLINKADDR 3
......@@ -34,7 +38,7 @@ struct channel_path_desc {
} __attribute__ ((packed));
struct channel_path {
int id;
struct chp_id chpid;
int state;
struct channel_path_desc desc;
/* Channel-measurement related stuff: */
......@@ -46,7 +50,7 @@ struct channel_path {
extern void s390_process_css( void );
extern void chsc_validate_chpids(struct subchannel *);
extern void chpid_is_actually_online(int);
extern void chpid_is_actually_online(struct chp_id);
extern int css_get_ssd_info(struct subchannel *);
extern int chsc_process_crw(void);
extern int chp_process_crw(int, int);
......
......@@ -954,6 +954,7 @@ static void css_reset(void)
{
int i, ret;
unsigned long long timeout;
struct chp_id chpid;
/* Reset subchannels. */
for_each_subchannel(__shutdown_subchannel_easy, NULL);
......@@ -963,8 +964,10 @@ static void css_reset(void)
__ctl_set_bit(14, 28);
/* Temporarily reenable machine checks. */
local_mcck_enable();
chp_id_init(&chpid);
for (i = 0; i <= __MAX_CHPID; i++) {
ret = rchp(i);
chpid.id = i;
ret = rchp(chpid);
if ((ret == 0) || (ret == 2))
/*
* rchp either succeeded, or another rchp is already
......
......@@ -22,6 +22,7 @@
#include "device.h"
#include "chsc.h"
#include "ioasm.h"
#include "chpid.h"
int
device_is_online(struct subchannel *sch)
......@@ -210,14 +211,17 @@ static void
__recover_lost_chpids(struct subchannel *sch, int old_lpm)
{
int mask, i;
struct chp_id chpid;
chp_id_init(&chpid);
for (i = 0; i<8; i++) {
mask = 0x80 >> i;
if (!(sch->lpm & mask))
continue;
if (old_lpm & mask)
continue;
chpid_is_actually_online(sch->schib.pmcw.chpid[i]);
chpid.id = sch->schib.pmcw.chpid[i];
chpid_is_actually_online(chpid);
}
}
......
......@@ -2,6 +2,7 @@
#define S390_CIO_IOASM_H
#include "schid.h"
#include "chpid.h"
/*
* TPI info structure
......@@ -189,9 +190,9 @@ static inline int chsc(void *chsc_area)
return cc;
}
static inline int rchp(int chpid)
static inline int rchp(struct chp_id chpid)
{
register unsigned int reg1 asm ("1") = chpid;
register struct chp_id reg1 asm ("1") = chpid;
int ccode;
asm volatile(
......
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