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-rw-r--r--drivers/s390/cio/chsc.c226
-rw-r--r--drivers/s390/cio/chsc.h2
-rw-r--r--drivers/s390/cio/css.c24
3 files changed, 116 insertions, 136 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index f26cc3e16181..d12c152cb691 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -29,8 +29,8 @@
#include "chsc.h"
static void *sei_page;
-static DEFINE_SPINLOCK(siosl_lock);
-static DEFINE_SPINLOCK(sda_lock);
+static void *chsc_page;
+static DEFINE_SPINLOCK(chsc_page_lock);
/**
* chsc_error_from_response() - convert a chsc response to an error
@@ -85,17 +85,15 @@ struct chsc_ssd_area {
int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
{
- unsigned long page;
struct chsc_ssd_area *ssd_area;
int ccode;
int ret;
int i;
int mask;
- page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!page)
- return -ENOMEM;
- ssd_area = (struct chsc_ssd_area *) page;
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ ssd_area = chsc_page;
ssd_area->request.length = 0x0010;
ssd_area->request.code = 0x0004;
ssd_area->ssid = schid.ssid;
@@ -106,25 +104,25 @@ int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
/* Check response. */
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
- goto out_free;
+ goto out;
}
ret = chsc_error_from_response(ssd_area->response.code);
if (ret != 0) {
CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
schid.ssid, schid.sch_no,
ssd_area->response.code);
- goto out_free;
+ goto out;
}
if (!ssd_area->sch_valid) {
ret = -ENODEV;
- goto out_free;
+ goto out;
}
/* Copy data */
ret = 0;
memset(ssd, 0, sizeof(struct chsc_ssd_info));
if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
(ssd_area->st != SUBCHANNEL_TYPE_MSG))
- goto out_free;
+ goto out;
ssd->path_mask = ssd_area->path_mask;
ssd->fla_valid_mask = ssd_area->fla_valid_mask;
for (i = 0; i < 8; i++) {
@@ -136,8 +134,8 @@ int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
if (ssd_area->fla_valid_mask & mask)
ssd->fla[i] = ssd_area->fla[i];
}
-out_free:
- free_page(page);
+out:
+ spin_unlock_irq(&chsc_page_lock);
return ret;
}
@@ -552,7 +550,7 @@ cleanup:
return ret;
}
-int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
+int __chsc_do_secm(struct channel_subsystem *css, int enable)
{
struct {
struct chsc_header request;
@@ -573,7 +571,9 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
} __attribute__ ((packed)) *secm_area;
int ret, ccode;
- secm_area = page;
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ secm_area = chsc_page;
secm_area->request.length = 0x0050;
secm_area->request.code = 0x0016;
@@ -584,8 +584,10 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
secm_area->operation_code = enable ? 0 : 1;
ccode = chsc(secm_area);
- if (ccode > 0)
- return (ccode == 3) ? -ENODEV : -EBUSY;
+ if (ccode > 0) {
+ ret = (ccode == 3) ? -ENODEV : -EBUSY;
+ goto out;
+ }
switch (secm_area->response.code) {
case 0x0102:
@@ -598,37 +600,32 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
secm_area->response.code);
+out:
+ spin_unlock_irq(&chsc_page_lock);
return ret;
}
int
chsc_secm(struct channel_subsystem *css, int enable)
{
- void *secm_area;
int ret;
- secm_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!secm_area)
- return -ENOMEM;
-
if (enable && !css->cm_enabled) {
css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!css->cub_addr1 || !css->cub_addr2) {
free_page((unsigned long)css->cub_addr1);
free_page((unsigned long)css->cub_addr2);
- free_page((unsigned long)secm_area);
return -ENOMEM;
}
}
- ret = __chsc_do_secm(css, enable, secm_area);
+ ret = __chsc_do_secm(css, enable);
if (!ret) {
css->cm_enabled = enable;
if (css->cm_enabled) {
ret = chsc_add_cmg_attr(css);
if (ret) {
- memset(secm_area, 0, PAGE_SIZE);
- __chsc_do_secm(css, 0, secm_area);
+ __chsc_do_secm(css, 0);
css->cm_enabled = 0;
}
} else
@@ -638,7 +635,6 @@ chsc_secm(struct channel_subsystem *css, int enable)
free_page((unsigned long)css->cub_addr1);
free_page((unsigned long)css->cub_addr2);
}
- free_page((unsigned long)secm_area);
return ret;
}
@@ -669,13 +665,12 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
return -EINVAL;
if ((rfmt == 2) && !css_general_characteristics.cib)
return -EINVAL;
- scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!scpd_area)
- return -ENOMEM;
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ scpd_area = chsc_page;
scpd_area->request.length = 0x0010;
scpd_area->request.code = 0x0002;
-
scpd_area->cssid = chpid.cssid;
scpd_area->first_chpid = chpid.id;
scpd_area->last_chpid = chpid.id;
@@ -698,7 +693,7 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
scpd_area->response.code);
out:
- free_page((unsigned long)scpd_area);
+ spin_unlock_irq(&chsc_page_lock);
return ret;
}
EXPORT_SYMBOL_GPL(chsc_determine_channel_path_desc);
@@ -725,33 +720,22 @@ static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
struct cmg_chars *chars)
{
- switch (chp->cmg) {
- case 2:
- case 3:
- chp->cmg_chars = kmalloc(sizeof(struct cmg_chars),
- GFP_KERNEL);
- if (chp->cmg_chars) {
- int i, mask;
- struct cmg_chars *cmg_chars;
-
- cmg_chars = chp->cmg_chars;
- for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
- mask = 0x80 >> (i + 3);
- if (cmcv & mask)
- cmg_chars->values[i] = chars->values[i];
- else
- cmg_chars->values[i] = 0;
- }
- }
- break;
- default:
- /* No cmg-dependent data. */
- break;
+ struct cmg_chars *cmg_chars;
+ int i, mask;
+
+ cmg_chars = chp->cmg_chars;
+ for (i = 0; i < NR_MEASUREMENT_CHARS; i++) {
+ mask = 0x80 >> (i + 3);
+ if (cmcv & mask)
+ cmg_chars->values[i] = chars->values[i];
+ else
+ cmg_chars->values[i] = 0;
}
}
int chsc_get_channel_measurement_chars(struct channel_path *chp)
{
+ struct cmg_chars *cmg_chars;
int ccode, ret;
struct {
@@ -775,13 +759,16 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
u32 data[NR_MEASUREMENT_CHARS];
} __attribute__ ((packed)) *scmc_area;
- scmc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!scmc_area)
+ chp->cmg_chars = NULL;
+ cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL);
+ if (!cmg_chars)
return -ENOMEM;
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ scmc_area = chsc_page;
scmc_area->request.length = 0x0010;
scmc_area->request.code = 0x0022;
-
scmc_area->first_chpid = chp->chpid.id;
scmc_area->last_chpid = chp->chpid.id;
@@ -792,24 +779,30 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
}
ret = chsc_error_from_response(scmc_area->response.code);
- if (ret == 0) {
- /* Success. */
- if (!scmc_area->not_valid) {
- chp->cmg = scmc_area->cmg;
- chp->shared = scmc_area->shared;
- chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
- (struct cmg_chars *)
- &scmc_area->data);
- } else {
- chp->cmg = -1;
- chp->shared = -1;
- }
- } else {
+ if (ret) {
CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
scmc_area->response.code);
+ goto out;
+ }
+ if (scmc_area->not_valid) {
+ chp->cmg = -1;
+ chp->shared = -1;
+ goto out;
+ }
+ chp->cmg = scmc_area->cmg;
+ chp->shared = scmc_area->shared;
+ if (chp->cmg != 2 && chp->cmg != 3) {
+ /* No cmg-dependent data. */
+ goto out;
}
+ chp->cmg_chars = cmg_chars;
+ chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
+ (struct cmg_chars *) &scmc_area->data);
out:
- free_page((unsigned long)scmc_area);
+ spin_unlock_irq(&chsc_page_lock);
+ if (!chp->cmg_chars)
+ kfree(cmg_chars);
+
return ret;
}
@@ -818,27 +811,33 @@ int __init chsc_init(void)
int ret;
sei_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!sei_page) {
- CIO_MSG_EVENT(0, "Can't allocate page for processing of "
- "chsc machine checks!\n");
- return -ENOMEM;
+ chsc_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sei_page || !chsc_page) {
+ ret = -ENOMEM;
+ goto out_err;
}
ret = crw_register_handler(CRW_RSC_CSS, chsc_process_crw);
if (ret)
- free_page((unsigned long)sei_page);
+ goto out_err;
+ return ret;
+out_err:
+ free_page((unsigned long)chsc_page);
+ free_page((unsigned long)sei_page);
return ret;
}
void __init chsc_init_cleanup(void)
{
crw_unregister_handler(CRW_RSC_CSS);
+ free_page((unsigned long)chsc_page);
free_page((unsigned long)sei_page);
}
int chsc_enable_facility(int operation_code)
{
+ unsigned long flags;
int ret;
- static struct {
+ struct {
struct chsc_header request;
u8 reserved1:4;
u8 format:4;
@@ -851,32 +850,33 @@ int chsc_enable_facility(int operation_code)
u32 reserved5:4;
u32 format2:4;
u32 reserved6:24;
- } __attribute__ ((packed, aligned(4096))) sda_area;
+ } __attribute__ ((packed)) *sda_area;
- spin_lock(&sda_lock);
- memset(&sda_area, 0, sizeof(sda_area));
- sda_area.request.length = 0x0400;
- sda_area.request.code = 0x0031;
- sda_area.operation_code = operation_code;
+ spin_lock_irqsave(&chsc_page_lock, flags);
+ memset(chsc_page, 0, PAGE_SIZE);
+ sda_area = chsc_page;
+ sda_area->request.length = 0x0400;
+ sda_area->request.code = 0x0031;
+ sda_area->operation_code = operation_code;
- ret = chsc(&sda_area);
+ ret = chsc(sda_area);
if (ret > 0) {
ret = (ret == 3) ? -ENODEV : -EBUSY;
goto out;
}
- switch (sda_area.response.code) {
+ switch (sda_area->response.code) {
case 0x0101:
ret = -EOPNOTSUPP;
break;
default:
- ret = chsc_error_from_response(sda_area.response.code);
+ ret = chsc_error_from_response(sda_area->response.code);
}
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
- operation_code, sda_area.response.code);
- out:
- spin_unlock(&sda_lock);
+ operation_code, sda_area->response.code);
+out:
+ spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
@@ -898,10 +898,9 @@ chsc_determine_css_characteristics(void)
u32 chsc_char[508];
} __attribute__ ((packed)) *scsc_area;
- scsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
- if (!scsc_area)
- return -ENOMEM;
-
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ scsc_area = chsc_page;
scsc_area->request.length = 0x0010;
scsc_area->request.code = 0x0010;
@@ -921,7 +920,7 @@ chsc_determine_css_characteristics(void)
CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
scsc_area->response.code);
exit:
- free_page ((unsigned long) scsc_area);
+ spin_unlock_irq(&chsc_page_lock);
return result;
}
@@ -976,29 +975,29 @@ int chsc_sstpi(void *page, void *result, size_t size)
return (rr->response.code == 0x0001) ? 0 : -EIO;
}
-static struct {
- struct chsc_header request;
- u32 word1;
- struct subchannel_id sid;
- u32 word3;
- struct chsc_header response;
- u32 word[11];
-} __attribute__ ((packed)) siosl_area __attribute__ ((__aligned__(PAGE_SIZE)));
-
int chsc_siosl(struct subchannel_id schid)
{
+ struct {
+ struct chsc_header request;
+ u32 word1;
+ struct subchannel_id sid;
+ u32 word3;
+ struct chsc_header response;
+ u32 word[11];
+ } __attribute__ ((packed)) *siosl_area;
unsigned long flags;
int ccode;
int rc;
- spin_lock_irqsave(&siosl_lock, flags);
- memset(&siosl_area, 0, sizeof(siosl_area));
- siosl_area.request.length = 0x0010;
- siosl_area.request.code = 0x0046;
- siosl_area.word1 = 0x80000000;
- siosl_area.sid = schid;
+ spin_lock_irqsave(&chsc_page_lock, flags);
+ memset(chsc_page, 0, PAGE_SIZE);
+ siosl_area = chsc_page;
+ siosl_area->request.length = 0x0010;
+ siosl_area->request.code = 0x0046;
+ siosl_area->word1 = 0x80000000;
+ siosl_area->sid = schid;
- ccode = chsc(&siosl_area);
+ ccode = chsc(siosl_area);
if (ccode > 0) {
if (ccode == 3)
rc = -ENODEV;
@@ -1008,17 +1007,16 @@ int chsc_siosl(struct subchannel_id schid)
schid.ssid, schid.sch_no, ccode);
goto out;
}
- rc = chsc_error_from_response(siosl_area.response.code);
+ rc = chsc_error_from_response(siosl_area->response.code);
if (rc)
CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
schid.ssid, schid.sch_no,
- siosl_area.response.code);
+ siosl_area->response.code);
else
CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
schid.ssid, schid.sch_no);
out:
- spin_unlock_irqrestore(&siosl_lock, flags);
-
+ spin_unlock_irqrestore(&chsc_page_lock, flags);
return rc;
}
EXPORT_SYMBOL_GPL(chsc_siosl);
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 6d669dd0dd84..852b61fc56ea 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -66,7 +66,7 @@ extern void chsc_init_cleanup(void);
extern int chsc_enable_facility(int);
struct channel_subsystem;
extern int chsc_secm(struct channel_subsystem *, int);
-int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page);
+int __chsc_do_secm(struct channel_subsystem *css, int enable);
int chsc_chp_vary(struct chp_id chpid, int on);
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index fa1ad3aab66f..5e1235c6aba0 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -790,7 +790,6 @@ static struct notifier_block css_reboot_notifier = {
static int css_power_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
- void *secm_area;
int ret, i;
switch (event) {
@@ -806,15 +805,8 @@ static int css_power_event(struct notifier_block *this, unsigned long event,
mutex_unlock(&css->mutex);
continue;
}
- secm_area = (void *)get_zeroed_page(GFP_KERNEL |
- GFP_DMA);
- if (secm_area) {
- if (__chsc_do_secm(css, 0, secm_area))
- ret = NOTIFY_BAD;
- free_page((unsigned long)secm_area);
- } else
+ if (__chsc_do_secm(css, 0))
ret = NOTIFY_BAD;
-
mutex_unlock(&css->mutex);
}
break;
@@ -830,15 +822,8 @@ static int css_power_event(struct notifier_block *this, unsigned long event,
mutex_unlock(&css->mutex);
continue;
}
- secm_area = (void *)get_zeroed_page(GFP_KERNEL |
- GFP_DMA);
- if (secm_area) {
- if (__chsc_do_secm(css, 1, secm_area))
- ret = NOTIFY_BAD;
- free_page((unsigned long)secm_area);
- } else
+ if (__chsc_do_secm(css, 1))
ret = NOTIFY_BAD;
-
mutex_unlock(&css->mutex);
}
/* search for subchannels, which appeared during hibernation */
@@ -867,10 +852,7 @@ static int __init css_bus_init(void)
if (ret)
return ret;
- ret = chsc_determine_css_characteristics();
- if (ret == -ENOMEM)
- goto out;
-
+ chsc_determine_css_characteristics();
/* Try to enable MSS. */
ret = chsc_enable_facility(CHSC_SDA_OC_MSS);
if (ret)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 04:40:46 +0000