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path: root/drivers/s390/cio/cio.c
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Diffstat (limited to 'drivers/s390/cio/cio.c')
-rw-r--r--drivers/s390/cio/cio.c61
1 files changed, 32 insertions, 29 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 33bff8fec7d1..3db2c386546f 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -114,6 +114,7 @@ cio_tpi(void)
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
+ int irq_context;
tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
if (tpi (NULL) != 1)
@@ -126,7 +127,9 @@ cio_tpi(void)
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch)
return 1;
- local_bh_disable();
+ irq_context = in_interrupt();
+ if (!irq_context)
+ local_bh_disable();
irq_enter ();
spin_lock(sch->lock);
memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
@@ -134,7 +137,8 @@ cio_tpi(void)
sch->driver->irq(sch);
spin_unlock(sch->lock);
irq_exit ();
- _local_bh_enable();
+ if (!irq_context)
+ _local_bh_enable();
return 1;
}
@@ -153,7 +157,7 @@ cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
CIO_MSG_EVENT(2, "cio_start: 'not oper' status for "
"subchannel 0.%x.%04x!\n", sch->schid.ssid,
sch->schid.sch_no);
- sprintf(dbf_text, "no%s", sch->dev.bus_id);
+ sprintf(dbf_text, "no%s", dev_name(&sch->dev));
CIO_TRACE_EVENT(0, dbf_text);
CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
@@ -171,9 +175,10 @@ cio_start_key (struct subchannel *sch, /* subchannel structure */
union orb *orb;
CIO_TRACE_EVENT(4, "stIO");
- CIO_TRACE_EVENT(4, sch->dev.bus_id);
+ CIO_TRACE_EVENT(4, dev_name(&sch->dev));
orb = &to_io_private(sch)->orb;
+ memset(orb, 0, sizeof(union orb));
/* sch is always under 2G. */
orb->cmd.intparm = (u32)(addr_t)sch;
orb->cmd.fmt = 1;
@@ -208,8 +213,10 @@ cio_start_key (struct subchannel *sch, /* subchannel structure */
case 1: /* status pending */
case 2: /* busy */
return -EBUSY;
- default: /* device/path not operational */
+ case 3: /* device/path not operational */
return cio_start_handle_notoper(sch, lpm);
+ default:
+ return ccode;
}
}
@@ -229,7 +236,7 @@ cio_resume (struct subchannel *sch)
int ccode;
CIO_TRACE_EVENT (4, "resIO");
- CIO_TRACE_EVENT (4, sch->dev.bus_id);
+ CIO_TRACE_EVENT(4, dev_name(&sch->dev));
ccode = rsch (sch->schid);
@@ -266,7 +273,7 @@ cio_halt(struct subchannel *sch)
return -ENODEV;
CIO_TRACE_EVENT (2, "haltIO");
- CIO_TRACE_EVENT (2, sch->dev.bus_id);
+ CIO_TRACE_EVENT(2, dev_name(&sch->dev));
/*
* Issue "Halt subchannel" and process condition code
@@ -301,7 +308,7 @@ cio_clear(struct subchannel *sch)
return -ENODEV;
CIO_TRACE_EVENT (2, "clearIO");
- CIO_TRACE_EVENT (2, sch->dev.bus_id);
+ CIO_TRACE_EVENT(2, dev_name(&sch->dev));
/*
* Issue "Clear subchannel" and process condition code
@@ -337,7 +344,7 @@ cio_cancel (struct subchannel *sch)
return -ENODEV;
CIO_TRACE_EVENT (2, "cancelIO");
- CIO_TRACE_EVENT (2, sch->dev.bus_id);
+ CIO_TRACE_EVENT(2, dev_name(&sch->dev));
ccode = xsch (sch->schid);
@@ -401,7 +408,7 @@ int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
int ret;
CIO_TRACE_EVENT (2, "ensch");
- CIO_TRACE_EVENT (2, sch->dev.bus_id);
+ CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return -EINVAL;
@@ -451,7 +458,7 @@ int cio_disable_subchannel(struct subchannel *sch)
int ret;
CIO_TRACE_EVENT (2, "dissch");
- CIO_TRACE_EVENT (2, sch->dev.bus_id);
+ CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return 0;
@@ -568,8 +575,10 @@ int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
}
mutex_init(&sch->reg_mutex);
/* Set a name for the subchannel */
- snprintf (sch->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x", schid.ssid,
- schid.sch_no);
+ if (cio_is_console(schid))
+ sch->dev.init_name = cio_get_console_sch_name(schid);
+ else
+ dev_set_name(&sch->dev, "0.%x.%04x", schid.ssid, schid.sch_no);
/*
* The first subchannel that is not-operational (ccode==3)
@@ -674,6 +683,7 @@ do_IRQ (struct pt_regs *regs)
#ifdef CONFIG_CCW_CONSOLE
static struct subchannel console_subchannel;
+static char console_sch_name[10] = "0.x.xxxx";
static struct io_subchannel_private console_priv;
static int console_subchannel_in_use;
@@ -824,6 +834,12 @@ cio_get_console_subchannel(void)
return &console_subchannel;
}
+const char *cio_get_console_sch_name(struct subchannel_id schid)
+{
+ snprintf(console_sch_name, 10, "0.%x.%04x", schid.ssid, schid.sch_no);
+ return (const char *)console_sch_name;
+}
+
#endif
static int
__disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
@@ -843,19 +859,6 @@ __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
return -EBUSY; /* uhm... */
}
-/* we can't use the normal udelay here, since it enables external interrupts */
-
-static void udelay_reset(unsigned long usecs)
-{
- uint64_t start_cc, end_cc;
-
- asm volatile ("STCK %0" : "=m" (start_cc));
- do {
- cpu_relax();
- asm volatile ("STCK %0" : "=m" (end_cc));
- } while (((end_cc - start_cc)/4096) < usecs);
-}
-
static int
__clear_io_subchannel_easy(struct subchannel_id schid)
{
@@ -871,7 +874,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid)
if (schid_equal(&ti.schid, &schid))
return 0;
}
- udelay_reset(100);
+ udelay_simple(100);
}
return -EBUSY;
}
@@ -879,7 +882,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid)
static void __clear_chsc_subchannel_easy(void)
{
/* It seems we can only wait for a bit here :/ */
- udelay_reset(100);
+ udelay_simple(100);
}
static int pgm_check_occured;
@@ -889,7 +892,7 @@ static void cio_reset_pgm_check_handler(void)
pgm_check_occured = 1;
}
-static int stsch_reset(struct subchannel_id schid, volatile struct schib *addr)
+static int stsch_reset(struct subchannel_id schid, struct schib *addr)
{
int rc;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 18:29:25 +0300