/*
* drivers/s390/cio/chsc.c
* S/390 common I/O routines -- channel subsystem call
- * $Revision: 1.119 $
+ * $Revision: 1.126 $
*
* Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
#include "ioasm.h"
#include "chsc.h"
-static struct channel_path *chps[NR_CHPIDS];
-
static void *sei_page;
static int new_channel_path(int chpid);
static inline void
set_chp_logically_online(int chp, int onoff)
{
- chps[chp]->state = onoff;
+ css[0]->chps[chp]->state = onoff;
}
static int
get_chp_status(int chp)
{
- return (chps[chp] ? chps[chp]->state : -ENODEV);
+ return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV);
}
void
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 */
.code = 0x0004,
};
- ssd_area->f_sch = sch->irq;
- ssd_area->l_sch = sch->irq;
+ ssd_area->ssid = sch->schid.ssid;
+ ssd_area->f_sch = sch->schid.sch_no;
+ ssd_area->l_sch = sch->schid.sch_no;
ccode = chsc(ssd_area);
if (ccode > 0) {
*/
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->irq);
+ " 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
return 0;
} else {
const char *type[4] = {"I/O", "chsc", "message", "ADM"};
- CIO_CRW_EVENT(6, "ssd: sch %04x is %s subchannel\n",
- sch->irq, 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;
int j;
int mask;
struct subchannel *sch;
- __u8 *chpid;
+ struct channel_path *chpid;
struct schib schib;
sch = to_subchannel(dev);
chpid = data;
for (j = 0; j < 8; j++)
- if (sch->schib.pmcw.chpid[j] == *chpid)
+ if (sch->schib.pmcw.chpid[j] == chpid->id)
break;
if (j >= 8)
return 0;
mask = 0x80 >> j;
spin_lock(&sch->lock);
- stsch(sch->irq, &schib);
+ stsch(sch->schid, &schib);
if (!schib.pmcw.dnv)
goto out_unreg;
memcpy(&sch->schib, &schib, sizeof(struct schib));
out_unreg:
spin_unlock(&sch->lock);
sch->lpm = 0;
- if (css_enqueue_subchannel_slow(sch->irq)) {
+ if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
need_rescan = 1;
}
s390_set_chpid_offline( __u8 chpid)
{
char dbf_txt[15];
+ struct device *dev;
sprintf(dbf_txt, "chpr%x", chpid);
CIO_TRACE_EVENT(2, dbf_txt);
if (get_chp_status(chpid) <= 0)
return;
-
- bus_for_each_dev(&css_bus_type, NULL, &chpid,
+ dev = get_device(&css[0]->chps[chpid]->dev);
+ bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev),
s390_subchannel_remove_chpid);
if (need_rescan || css_slow_subchannels_exist())
queue_work(slow_path_wq, &slow_path_work);
+ put_device(dev);
}
+struct res_acc_data {
+ struct channel_path *chp;
+ u32 fla_mask;
+ u16 fla;
+};
+
static int
-s390_process_res_acc_sch(u8 chpid, __u16 fla, u32 fla_mask,
- struct subchannel *sch)
+s390_process_res_acc_sch(struct res_acc_data *res_data, struct subchannel *sch)
{
int found;
int chp;
* check if chpid is in information updated by ssd
*/
if (sch->ssd_info.valid &&
- sch->ssd_info.chpid[chp] == chpid &&
- (sch->ssd_info.fla[chp] & fla_mask) == fla) {
+ sch->ssd_info.chpid[chp] == res_data->chp->id &&
+ (sch->ssd_info.fla[chp] & res_data->fla_mask)
+ == res_data->fla) {
found = 1;
break;
}
* new path information and eventually check for logically
* offline chpids.
*/
- ccode = stsch(sch->irq, &sch->schib);
+ ccode = stsch(sch->schid, &sch->schib);
if (ccode > 0)
return 0;
return 0x80 >> chp;
}
+static inline int
+s390_process_res_acc_new_sch(struct subchannel_id schid)
+{
+ struct schib schib;
+ int ret;
+ /*
+ * We don't know the device yet, but since a path
+ * may be available now to the device we'll have
+ * to do recognition again.
+ * Since we don't have any idea about which chpid
+ * that beast may be on we'll have to do a stsch
+ * on all devices, grr...
+ */
+ if (stsch_err(schid, &schib))
+ /* We're through */
+ return need_rescan ? -EAGAIN : -ENXIO;
+
+ /* Put it on the slow path. */
+ ret = css_enqueue_subchannel_slow(schid);
+ if (ret) {
+ css_clear_subchannel_slow_list();
+ need_rescan = 1;
+ return -EAGAIN;
+ }
+ return 0;
+}
+
static int
-s390_process_res_acc (u8 chpid, __u16 fla, u32 fla_mask)
+__s390_process_res_acc(struct subchannel_id schid, void *data)
{
+ int chp_mask, old_lpm;
+ struct res_acc_data *res_data;
struct subchannel *sch;
- int irq, rc;
+
+ res_data = (struct res_acc_data *)data;
+ sch = get_subchannel_by_schid(schid);
+ if (!sch)
+ /* Check if a subchannel is newly available. */
+ return s390_process_res_acc_new_sch(schid);
+
+ spin_lock_irq(&sch->lock);
+
+ chp_mask = s390_process_res_acc_sch(res_data, sch);
+
+ if (chp_mask == 0) {
+ spin_unlock_irq(&sch->lock);
+ return 0;
+ }
+ old_lpm = sch->lpm;
+ sch->lpm = ((sch->schib.pmcw.pim &
+ sch->schib.pmcw.pam &
+ sch->schib.pmcw.pom)
+ | chp_mask) & sch->opm;
+ if (!old_lpm && sch->lpm)
+ device_trigger_reprobe(sch);
+ else if (sch->driver && sch->driver->verify)
+ sch->driver->verify(&sch->dev);
+
+ spin_unlock_irq(&sch->lock);
+ put_device(&sch->dev);
+ return (res_data->fla_mask == 0xffff) ? -ENODEV : 0;
+}
+
+
+static int
+s390_process_res_acc (struct res_acc_data *res_data)
+{
+ int rc;
char dbf_txt[15];
- sprintf(dbf_txt, "accpr%x", chpid);
+ sprintf(dbf_txt, "accpr%x", res_data->chp->id);
CIO_TRACE_EVENT( 2, dbf_txt);
- if (fla != 0) {
- sprintf(dbf_txt, "fla%x", fla);
+ if (res_data->fla != 0) {
+ sprintf(dbf_txt, "fla%x", res_data->fla);
CIO_TRACE_EVENT( 2, dbf_txt);
}
* The more information we have (info), the less scanning
* will we have to do.
*/
-
- if (!get_chp_status(chpid))
- return 0; /* no need to do the rest */
-
- rc = 0;
- for (irq = 0; irq < __MAX_SUBCHANNELS; irq++) {
- int chp_mask, old_lpm;
-
- sch = get_subchannel_by_schid(irq);
- if (!sch) {
- struct schib schib;
- int ret;
- /*
- * We don't know the device yet, but since a path
- * may be available now to the device we'll have
- * to do recognition again.
- * Since we don't have any idea about which chpid
- * that beast may be on we'll have to do a stsch
- * on all devices, grr...
- */
- if (stsch(irq, &schib)) {
- /* We're through */
- if (need_rescan)
- rc = -EAGAIN;
- break;
- }
- if (need_rescan) {
- rc = -EAGAIN;
- continue;
- }
- /* Put it on the slow path. */
- ret = css_enqueue_subchannel_slow(irq);
- if (ret) {
- css_clear_subchannel_slow_list();
- need_rescan = 1;
- }
- rc = -EAGAIN;
- continue;
- }
-
- spin_lock_irq(&sch->lock);
-
- chp_mask = s390_process_res_acc_sch(chpid, fla, fla_mask, sch);
-
- if (chp_mask == 0) {
-
- spin_unlock_irq(&sch->lock);
-
- if (fla_mask != 0)
- break;
- else
- continue;
- }
- old_lpm = sch->lpm;
- sch->lpm = ((sch->schib.pmcw.pim &
- sch->schib.pmcw.pam &
- sch->schib.pmcw.pom)
- | chp_mask) & sch->opm;
- if (!old_lpm && sch->lpm)
- device_trigger_reprobe(sch);
- else if (sch->driver && sch->driver->verify)
- sch->driver->verify(&sch->dev);
-
- spin_unlock_irq(&sch->lock);
- put_device(&sch->dev);
- if (fla_mask != 0)
- break;
- }
+ rc = for_each_subchannel(__s390_process_res_acc, res_data);
+ if (css_slow_subchannels_exist())
+ rc = -EAGAIN;
+ else if (rc != -EAGAIN)
+ rc = 0;
return rc;
}
chsc_process_crw(void)
{
int chpid, ret;
+ struct res_acc_data res_data;
struct {
struct chsc_header request;
u32 reserved1;
ret = 0;
do {
int ccode, status;
+ struct device *dev;
memset(sei_area, 0, sizeof(*sei_area));
-
+ memset(&res_data, 0, sizeof(struct res_acc_data));
sei_area->request = (struct chsc_header) {
.length = 0x0010,
.code = 0x000e,
if (status < 0)
new_channel_path(sei_area->rsid);
else if (!status)
- return 0;
- if ((sei_area->vf & 0x80) == 0) {
- pr_debug("chpid: %x\n", sei_area->rsid);
- ret = s390_process_res_acc(sei_area->rsid,
- 0, 0);
- } else if ((sei_area->vf & 0xc0) == 0x80) {
- pr_debug("chpid: %x link addr: %x\n",
- sei_area->rsid, sei_area->fla);
- ret = s390_process_res_acc(sei_area->rsid,
- sei_area->fla,
- 0xff00);
- } else if ((sei_area->vf & 0xc0) == 0xc0) {
- pr_debug("chpid: %x full link addr: %x\n",
- sei_area->rsid, sei_area->fla);
- ret = s390_process_res_acc(sei_area->rsid,
- sei_area->fla,
- 0xffff);
+ break;
+ dev = get_device(&css[0]->chps[sei_area->rsid]->dev);
+ res_data.chp = to_channelpath(dev);
+ pr_debug("chpid: %x", sei_area->rsid);
+ if ((sei_area->vf & 0xc0) != 0) {
+ res_data.fla = sei_area->fla;
+ if ((sei_area->vf & 0xc0) == 0xc0) {
+ pr_debug(" full link addr: %x",
+ sei_area->fla);
+ res_data.fla_mask = 0xffff;
+ } else {
+ pr_debug(" link addr: %x",
+ sei_area->fla);
+ res_data.fla_mask = 0xff00;
+ }
}
- pr_debug("\n");
-
+ ret = s390_process_res_acc(&res_data);
+ pr_debug("\n\n");
+ put_device(dev);
break;
default: /* other stuff */
return ret;
}
+static inline int
+__chp_add_new_sch(struct subchannel_id schid)
+{
+ struct schib schib;
+ int ret;
+
+ if (stsch(schid, &schib))
+ /* We're through */
+ return need_rescan ? -EAGAIN : -ENXIO;
+
+ /* Put it on the slow path. */
+ ret = css_enqueue_subchannel_slow(schid);
+ if (ret) {
+ css_clear_subchannel_slow_list();
+ need_rescan = 1;
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+
static int
-chp_add(int chpid)
+__chp_add(struct subchannel_id schid, void *data)
{
+ int i;
+ struct channel_path *chp;
struct subchannel *sch;
- int irq, ret, rc;
+
+ chp = (struct channel_path *)data;
+ sch = get_subchannel_by_schid(schid);
+ if (!sch)
+ /* Check if the subchannel is now available. */
+ return __chp_add_new_sch(schid);
+ spin_lock(&sch->lock);
+ for (i=0; i<8; i++)
+ if (sch->schib.pmcw.chpid[i] == chp->id) {
+ if (stsch(sch->schid, &sch->schib) != 0) {
+ /* Endgame. */
+ spin_unlock(&sch->lock);
+ return -ENXIO;
+ }
+ break;
+ }
+ if (i==8) {
+ spin_unlock(&sch->lock);
+ return 0;
+ }
+ sch->lpm = ((sch->schib.pmcw.pim &
+ sch->schib.pmcw.pam &
+ sch->schib.pmcw.pom)
+ | 0x80 >> i) & sch->opm;
+
+ if (sch->driver && sch->driver->verify)
+ sch->driver->verify(&sch->dev);
+
+ spin_unlock(&sch->lock);
+ put_device(&sch->dev);
+ return 0;
+}
+
+static int
+chp_add(int chpid)
+{
+ int rc;
char dbf_txt[15];
+ struct device *dev;
if (!get_chp_status(chpid))
return 0; /* no need to do the rest */
sprintf(dbf_txt, "cadd%x", chpid);
CIO_TRACE_EVENT(2, dbf_txt);
- rc = 0;
- for (irq = 0; irq < __MAX_SUBCHANNELS; irq++) {
- int i;
-
- sch = get_subchannel_by_schid(irq);
- if (!sch) {
- struct schib schib;
-
- if (stsch(irq, &schib)) {
- /* We're through */
- if (need_rescan)
- rc = -EAGAIN;
- break;
- }
- if (need_rescan) {
- rc = -EAGAIN;
- continue;
- }
- /* Put it on the slow path. */
- ret = css_enqueue_subchannel_slow(irq);
- if (ret) {
- css_clear_subchannel_slow_list();
- need_rescan = 1;
- }
- rc = -EAGAIN;
- continue;
- }
-
- spin_lock(&sch->lock);
- for (i=0; i<8; i++)
- if (sch->schib.pmcw.chpid[i] == chpid) {
- if (stsch(sch->irq, &sch->schib) != 0) {
- /* Endgame. */
- spin_unlock(&sch->lock);
- return rc;
- }
- break;
- }
- if (i==8) {
- spin_unlock(&sch->lock);
- return rc;
- }
- sch->lpm = ((sch->schib.pmcw.pim &
- sch->schib.pmcw.pam &
- sch->schib.pmcw.pom)
- | 0x80 >> i) & sch->opm;
-
- if (sch->driver && sch->driver->verify)
- sch->driver->verify(&sch->dev);
-
- spin_unlock(&sch->lock);
- put_device(&sch->dev);
- }
+ dev = get_device(&css[0]->chps[chpid]->dev);
+ rc = for_each_subchannel(__chp_add, to_channelpath(dev));
+ if (css_slow_subchannels_exist())
+ rc = -EAGAIN;
+ if (rc != -EAGAIN)
+ rc = 0;
+ put_device(dev);
return rc;
}
if (!device_is_online(sch))
/* cio could be doing I/O. */
return 0;
- cc = stsch(sch->irq, &sch->schib);
+ cc = stsch(sch->schid, &sch->schib);
if (cc)
return 0;
if (sch->schib.scsw.actl && sch->schib.pmcw.lpum == (0x80 >> index)) {
* just varied off path. Then kill it.
*/
if (!__check_for_io_and_kill(sch, chp) && !sch->lpm) {
- if (css_enqueue_subchannel_slow(sch->irq)) {
+ if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
need_rescan = 1;
}
return 0;
}
+static int
+__s390_vary_chpid_on(struct subchannel_id schid, void *data)
+{
+ struct schib schib;
+ struct subchannel *sch;
+
+ sch = get_subchannel_by_schid(schid);
+ if (sch) {
+ put_device(&sch->dev);
+ return 0;
+ }
+ if (stsch_err(schid, &schib))
+ /* We're through */
+ return -ENXIO;
+ /* Put it on the slow path. */
+ if (css_enqueue_subchannel_slow(schid)) {
+ css_clear_subchannel_slow_list();
+ need_rescan = 1;
+ return -EAGAIN;
+ }
+ return 0;
+}
+
/*
* Function: s390_vary_chpid
* Varies the specified chpid online or offline
s390_vary_chpid( __u8 chpid, int on)
{
char dbf_text[15];
- int status, irq, ret;
- struct subchannel *sch;
+ int status;
sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid);
CIO_TRACE_EVENT( 2, dbf_text);
bus_for_each_dev(&css_bus_type, NULL, &chpid, on ?
s390_subchannel_vary_chpid_on :
s390_subchannel_vary_chpid_off);
- if (!on)
- goto out;
- /* Scan for new devices on varied on path. */
- for (irq = 0; irq < __MAX_SUBCHANNELS; irq++) {
- struct schib schib;
-
- if (need_rescan)
- break;
- sch = get_subchannel_by_schid(irq);
- if (sch) {
- put_device(&sch->dev);
- continue;
- }
- if (stsch(irq, &schib))
- /* We're through */
- break;
- /* Put it on the slow path. */
- ret = css_enqueue_subchannel_slow(irq);
- if (ret) {
- css_clear_subchannel_slow_list();
- need_rescan = 1;
- }
- }
-out:
+ if (on)
+ /* Scan for new devices on varied on path. */
+ for_each_subchannel(__s390_vary_chpid_on, NULL);
if (need_rescan || css_slow_subchannels_exist())
queue_work(slow_path_wq, &slow_path_work);
return 0;
chp->id = chpid;
chp->state = 1;
chp->dev = (struct device) {
- .parent = &css_bus_device,
+ .parent = &css[0]->device,
.release = chp_release,
};
snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid);
device_unregister(&chp->dev);
goto out_free;
} else
- chps[chpid] = chp;
+ css[0]->chps[chpid] = chp;
return ret;
out_free:
kfree(chp);
struct channel_path *chp;
struct channel_path_desc *desc;
- chp = chps[sch->schib.pmcw.chpid[chp_no]];
+ chp = css[0]->chps[sch->schib.pmcw.chpid[chp_no]];
if (!chp)
return NULL;
desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL);
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;
git.openpandora.org / pandora-kernel.git / blobdiff