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path: root/drivers/s390/cio
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Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/ccwreq.c16
-rw-r--r--drivers/s390/cio/chsc.c48
-rw-r--r--drivers/s390/cio/chsc.h2
-rw-r--r--drivers/s390/cio/device.c47
-rw-r--r--drivers/s390/cio/device_pgid.c3
-rw-r--r--drivers/s390/cio/io_sch.h10
6 files changed, 115 insertions, 11 deletions
diff --git a/drivers/s390/cio/ccwreq.c b/drivers/s390/cio/ccwreq.c
index 7f206ed44fdf..d15f8b4d78bd 100644
--- a/drivers/s390/cio/ccwreq.c
+++ b/drivers/s390/cio/ccwreq.c
@@ -38,9 +38,13 @@ static u16 ccwreq_next_path(struct ccw_device *cdev)
{
struct ccw_request *req = &cdev->private->req;
+ if (!req->singlepath) {
+ req->mask = 0;
+ goto out;
+ }
req->retries = req->maxretries;
req->mask = lpm_adjust(req->mask >>= 1, req->lpm);
-
+out:
return req->mask;
}
@@ -113,8 +117,12 @@ void ccw_request_start(struct ccw_device *cdev)
{
struct ccw_request *req = &cdev->private->req;
- /* Try all paths twice to counter link flapping. */
- req->mask = 0x8080;
+ if (req->singlepath) {
+ /* Try all paths twice to counter link flapping. */
+ req->mask = 0x8080;
+ } else
+ req->mask = req->lpm;
+
req->retries = req->maxretries;
req->mask = lpm_adjust(req->mask, req->lpm);
req->drc = 0;
@@ -182,6 +190,8 @@ static enum io_status ccwreq_status(struct ccw_device *cdev, struct irb *lcirb)
/* Ask the driver what to do */
if (cdev->drv && cdev->drv->uc_handler) {
todo = cdev->drv->uc_handler(cdev, lcirb);
+ CIO_TRACE_EVENT(2, "uc_response");
+ CIO_HEX_EVENT(2, &todo, sizeof(todo));
switch (todo) {
case UC_TODO_RETRY:
return IO_STATUS_ERROR;
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 407d0e9adfaf..4cbb1a6ca33c 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -29,6 +29,7 @@
#include "chsc.h"
static void *sei_page;
+static DEFINE_SPINLOCK(siosl_lock);
static DEFINE_SPINLOCK(sda_lock);
/**
@@ -48,6 +49,7 @@ int chsc_error_from_response(int response)
case 0x0007:
case 0x0008:
case 0x000a:
+ case 0x0104:
return -EINVAL;
case 0x0004:
return -EOPNOTSUPP;
@@ -974,3 +976,49 @@ 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)
+{
+ 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;
+
+ ccode = chsc(&siosl_area);
+ if (ccode > 0) {
+ if (ccode == 3)
+ rc = -ENODEV;
+ else
+ rc = -EBUSY;
+ CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
+ schid.ssid, schid.sch_no, ccode);
+ goto out;
+ }
+ 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);
+ 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);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(chsc_siosl);
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 37aa611d4ac5..5453013f094b 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -80,4 +80,6 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp);
int chsc_error_from_response(int response);
+int chsc_siosl(struct subchannel_id schid);
+
#endif
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 6d229f3523a0..51bd3687d163 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -36,6 +36,7 @@
#include "ioasm.h"
#include "io_sch.h"
#include "blacklist.h"
+#include "chsc.h"
static struct timer_list recovery_timer;
static DEFINE_SPINLOCK(recovery_lock);
@@ -486,9 +487,11 @@ static int online_store_handle_offline(struct ccw_device *cdev)
spin_lock_irq(cdev->ccwlock);
ccw_device_sched_todo(cdev, CDEV_TODO_UNREG_EVAL);
spin_unlock_irq(cdev->ccwlock);
- } else if (cdev->online && cdev->drv && cdev->drv->set_offline)
+ return 0;
+ }
+ if (cdev->drv && cdev->drv->set_offline)
return ccw_device_set_offline(cdev);
- return 0;
+ return -EINVAL;
}
static int online_store_recog_and_online(struct ccw_device *cdev)
@@ -505,8 +508,8 @@ static int online_store_recog_and_online(struct ccw_device *cdev)
return -EAGAIN;
}
if (cdev->drv && cdev->drv->set_online)
- ccw_device_set_online(cdev);
- return 0;
+ return ccw_device_set_online(cdev);
+ return -EINVAL;
}
static int online_store_handle_online(struct ccw_device *cdev, int force)
@@ -598,6 +601,25 @@ available_show (struct device *dev, struct device_attribute *attr, char *buf)
}
}
+static ssize_t
+initiate_logging(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct subchannel *sch = to_subchannel(dev);
+ int rc;
+
+ rc = chsc_siosl(sch->schid);
+ if (rc < 0) {
+ pr_warning("Logging for subchannel 0.%x.%04x failed with "
+ "errno=%d\n",
+ sch->schid.ssid, sch->schid.sch_no, rc);
+ return rc;
+ }
+ pr_notice("Logging for subchannel 0.%x.%04x was triggered\n",
+ sch->schid.ssid, sch->schid.sch_no);
+ return count;
+}
+
static DEVICE_ATTR(chpids, 0444, chpids_show, NULL);
static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
static DEVICE_ATTR(devtype, 0444, devtype_show, NULL);
@@ -605,10 +627,12 @@ static DEVICE_ATTR(cutype, 0444, cutype_show, NULL);
static DEVICE_ATTR(modalias, 0444, modalias_show, NULL);
static DEVICE_ATTR(online, 0644, online_show, online_store);
static DEVICE_ATTR(availability, 0444, available_show, NULL);
+static DEVICE_ATTR(logging, 0200, NULL, initiate_logging);
static struct attribute *io_subchannel_attrs[] = {
&dev_attr_chpids.attr,
&dev_attr_pimpampom.attr,
+ &dev_attr_logging.attr,
NULL,
};
@@ -2036,6 +2060,21 @@ void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo)
}
}
+/**
+ * ccw_device_siosl() - initiate logging
+ * @cdev: ccw device
+ *
+ * This function is used to invoke model-dependent logging within the channel
+ * subsystem.
+ */
+int ccw_device_siosl(struct ccw_device *cdev)
+{
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+
+ return chsc_siosl(sch->schid);
+}
+EXPORT_SYMBOL_GPL(ccw_device_siosl);
+
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ccw_device_set_online);
EXPORT_SYMBOL(ccw_device_set_offline);
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index 6facb5499a65..82a5ad0d63f6 100644
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -208,6 +208,7 @@ static void spid_start(struct ccw_device *cdev)
req->timeout = PGID_TIMEOUT;
req->maxretries = PGID_RETRIES;
req->lpm = 0x80;
+ req->singlepath = 1;
req->callback = spid_callback;
spid_do(cdev);
}
@@ -420,6 +421,7 @@ static void verify_start(struct ccw_device *cdev)
req->timeout = PGID_TIMEOUT;
req->maxretries = PGID_RETRIES;
req->lpm = 0x80;
+ req->singlepath = 1;
if (cdev->private->flags.pgroup) {
CIO_TRACE_EVENT(4, "snid");
CIO_HEX_EVENT(4, devid, sizeof(*devid));
@@ -507,6 +509,7 @@ void ccw_device_disband_start(struct ccw_device *cdev)
req->timeout = PGID_TIMEOUT;
req->maxretries = PGID_RETRIES;
req->lpm = sch->schib.pmcw.pam & sch->opm;
+ req->singlepath = 1;
req->callback = disband_callback;
fn = SPID_FUNC_DISBAND;
if (cdev->private->flags.mpath)
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index b9ce712a7f25..469ef93f2302 100644
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -92,11 +92,12 @@ enum io_status {
* @filter: optional callback to adjust request status based on IRB data
* @callback: final callback
* @data: user-defined pointer passed to all callbacks
+ * @singlepath: if set, use only one path from @lpm per start I/O
+ * @cancel: non-zero if request was cancelled
+ * @done: non-zero if request was finished
* @mask: current path mask
* @retries: current number of retries
* @drc: delayed return code
- * @cancel: non-zero if request was cancelled
- * @done: non-zero if request was finished
*/
struct ccw_request {
struct ccw1 *cp;
@@ -108,12 +109,13 @@ struct ccw_request {
enum io_status);
void (*callback)(struct ccw_device *, void *, int);
void *data;
+ unsigned int singlepath:1;
/* These fields are used internally. */
+ unsigned int cancel:1;
+ unsigned int done:1;
u16 mask;
u16 retries;
int drc;
- int cancel:1;
- int done:1;
} __attribute__((packed));
/*
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 13:37:18 +0300