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path: root/drivers/s390/cio/chsc_sch.c
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Diffstat (limited to 'drivers/s390/cio/chsc_sch.c')
-rw-r--r--drivers/s390/cio/chsc_sch.c84
1 files changed, 20 insertions, 64 deletions
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 735052ecd3e5..ce992b2107cb 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Driver for s390 chsc subchannels
*
@@ -8,14 +9,13 @@
*/
#include <linux/slab.h>
-#include <linux/compat.h>
#include <linux/device.h>
+#include <linux/io.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/kernel_stat.h>
-#include <asm/compat.h>
#include <asm/cio.h>
#include <asm/chsc.h>
#include <asm/isc.h>
@@ -43,11 +43,7 @@ static DEFINE_MUTEX(on_close_mutex);
static void CHSC_LOG_HEX(int level, void *data, int length)
{
- while (length > 0) {
- debug_event(chsc_debug_log_id, level, data, length);
- length -= chsc_debug_log_id->buf_size;
- data += chsc_debug_log_id->buf_size;
- }
+ debug_event(chsc_debug_log_id, level, data, length);
}
MODULE_AUTHOR("IBM Corporation");
@@ -89,22 +85,17 @@ static int chsc_subchannel_probe(struct subchannel *sch)
if (!private)
return -ENOMEM;
dev_set_drvdata(&sch->dev, private);
- ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
+ ret = cio_enable_subchannel(sch, (u32)virt_to_phys(sch));
if (ret) {
CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
sch->schid.ssid, sch->schid.sch_no, ret);
dev_set_drvdata(&sch->dev, NULL);
kfree(private);
- } else {
- if (dev_get_uevent_suppress(&sch->dev)) {
- dev_set_uevent_suppress(&sch->dev, 0);
- kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
- }
}
return ret;
}
-static int chsc_subchannel_remove(struct subchannel *sch)
+static void chsc_subchannel_remove(struct subchannel *sch)
{
struct chsc_private *private;
@@ -116,7 +107,6 @@ static int chsc_subchannel_remove(struct subchannel *sch)
put_device(&sch->dev);
}
kfree(private);
- return 0;
}
static void chsc_subchannel_shutdown(struct subchannel *sch)
@@ -124,31 +114,6 @@ static void chsc_subchannel_shutdown(struct subchannel *sch)
cio_disable_subchannel(sch);
}
-static int chsc_subchannel_prepare(struct subchannel *sch)
-{
- int cc;
- struct schib schib;
- /*
- * Don't allow suspend while the subchannel is not idle
- * since we don't have a way to clear the subchannel and
- * cannot disable it with a request running.
- */
- cc = stsch(sch->schid, &schib);
- if (!cc && scsw_stctl(&schib.scsw))
- return -EAGAIN;
- return 0;
-}
-
-static int chsc_subchannel_freeze(struct subchannel *sch)
-{
- return cio_disable_subchannel(sch);
-}
-
-static int chsc_subchannel_restore(struct subchannel *sch)
-{
- return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
-}
-
static struct css_device_id chsc_subchannel_ids[] = {
{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
{ /* end of list */ },
@@ -165,10 +130,6 @@ static struct css_driver chsc_subchannel_driver = {
.probe = chsc_subchannel_probe,
.remove = chsc_subchannel_remove,
.shutdown = chsc_subchannel_shutdown,
- .prepare = chsc_subchannel_prepare,
- .freeze = chsc_subchannel_freeze,
- .thaw = chsc_subchannel_restore,
- .restore = chsc_subchannel_restore,
};
static int __init chsc_init_dbfs(void)
@@ -207,7 +168,7 @@ static void chsc_cleanup_sch_driver(void)
static DEFINE_SPINLOCK(chsc_lock);
-static int chsc_subchannel_match_next_free(struct device *dev, void *data)
+static int chsc_subchannel_match_next_free(struct device *dev, const void *data)
{
struct subchannel *sch = to_subchannel(dev);
@@ -249,10 +210,10 @@ static int chsc_async(struct chsc_async_area *chsc_area,
chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
while ((sch = chsc_get_next_subchannel(sch))) {
- spin_lock(sch->lock);
+ spin_lock(&sch->lock);
private = dev_get_drvdata(&sch->dev);
if (private->request) {
- spin_unlock(sch->lock);
+ spin_unlock(&sch->lock);
ret = -EBUSY;
continue;
}
@@ -277,7 +238,7 @@ static int chsc_async(struct chsc_async_area *chsc_area,
default:
ret = -ENODEV;
}
- spin_unlock(sch->lock);
+ spin_unlock(&sch->lock);
CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
sch->schid.ssid, sch->schid.sch_no, cc);
if (ret == -EINPROGRESS)
@@ -331,7 +292,7 @@ static int chsc_ioctl_start(void __user *user_area)
if (!css_general_characteristics.dynio)
/* It makes no sense to try. */
return -EOPNOTSUPP;
- chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
+ chsc_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!chsc_area)
return -ENOMEM;
request = kzalloc(sizeof(*request), GFP_KERNEL);
@@ -379,7 +340,7 @@ static int chsc_ioctl_on_close_set(void __user *user_area)
ret = -ENOMEM;
goto out_unlock;
}
- on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
+ on_close_chsc_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!on_close_chsc_area) {
ret = -ENOMEM;
goto out_free_request;
@@ -431,7 +392,7 @@ static int chsc_ioctl_start_sync(void __user *user_area)
struct chsc_sync_area *chsc_area;
int ret, ccode;
- chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ chsc_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!chsc_area)
return -ENOMEM;
if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
@@ -477,7 +438,7 @@ static int chsc_ioctl_info_channel_path(void __user *user_cd)
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scpcd_area;
- scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ scpcd_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!scpcd_area)
return -ENOMEM;
cd = kzalloc(sizeof(*cd), GFP_KERNEL);
@@ -539,7 +500,7 @@ static int chsc_ioctl_info_cu(void __user *user_cd)
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scucd_area;
- scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ scucd_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!scucd_area)
return -ENOMEM;
cd = kzalloc(sizeof(*cd), GFP_KERNEL);
@@ -602,7 +563,7 @@ static int chsc_ioctl_info_sch_cu(void __user *user_cud)
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *sscud_area;
- sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ sscud_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!sscud_area)
return -ENOMEM;
cud = kzalloc(sizeof(*cud), GFP_KERNEL);
@@ -664,7 +625,7 @@ static int chsc_ioctl_conf_info(void __user *user_ci)
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *sci_area;
- sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ sci_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!sci_area)
return -ENOMEM;
ci = kzalloc(sizeof(*ci), GFP_KERNEL);
@@ -735,7 +696,7 @@ static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
u32 res;
} __attribute__ ((packed)) *cssids_parm;
- sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ sccl_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!sccl_area)
return -ENOMEM;
ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
@@ -795,7 +756,7 @@ static int chsc_ioctl_chpd(void __user *user_chpd)
int ret;
chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
- scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ scpd_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!scpd_area || !chpd) {
ret = -ENOMEM;
goto out_free;
@@ -835,7 +796,7 @@ static int chsc_ioctl_dcal(void __user *user_dcal)
u8 data[PAGE_SIZE - 36];
} __attribute__ ((packed)) *sdcal_area;
- sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ sdcal_area = (void *)get_zeroed_page(GFP_KERNEL);
if (!sdcal_area)
return -ENOMEM;
dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
@@ -883,10 +844,7 @@ static long chsc_ioctl(struct file *filp, unsigned int cmd,
void __user *argp;
CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
- if (is_compat_task())
- argp = compat_ptr(arg);
- else
- argp = (void __user *)arg;
+ argp = (void __user *)arg;
switch (cmd) {
case CHSC_START:
return chsc_ioctl_start(argp);
@@ -961,8 +919,6 @@ static const struct file_operations chsc_fops = {
.open = chsc_open,
.release = chsc_release,
.unlocked_ioctl = chsc_ioctl,
- .compat_ioctl = chsc_ioctl,
- .llseek = no_llseek,
};
static struct miscdevice chsc_misc_device = {
generated by cgit (git 2.34.1) at 2025-12-26 08:37:57 +0000