X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fs390%2Fcio%2Fcio.c;h=b3a56dc5f68a2fd5144dad6d7bd6abef50369fd0;hb=572543d8b410c9734b530e811139120e36371ebd;hp=7835a714a405c90018dc8fa2aea49f415c829851;hpb=40b20c257a13c5a526ac540bc5e43d0fdf29792a;p=powerpc.git

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 7835a714a4..b3a56dc5f6 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -2,8 +2,7 @@
  *  drivers/s390/cio/cio.c
  *   S/390 common I/O routines -- low level i/o calls
  *
- *    Copyright (C) 1999-2002 IBM Deutschland Entwicklung GmbH,
- *			      IBM Corporation
+ *    Copyright (C) IBM Corp. 1999,2006
  *    Author(s): Ingo Adlung (adlung@de.ibm.com)
  *		 Cornelia Huck (cornelia.huck@de.ibm.com)
  *		 Arnd Bergmann (arndb@de.ibm.com)
@@ -123,7 +122,7 @@ cio_get_options (struct subchannel *sch)
  * Use tpi to get a pending interrupt, call the interrupt handler and
  * return a pointer to the subchannel structure.
  */
-static inline int
+static int
 cio_tpi(void)
 {
 	struct tpi_info *tpi_info;
@@ -153,7 +152,7 @@ cio_tpi(void)
 	return 1;
 }
 
-static inline int
+static int
 cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
 {
 	char dbf_text[15];
@@ -586,7 +585,7 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
 		 * This device must not be known to Linux. So we simply
 		 * say that there is no device and return ENODEV.
 		 */
-		CIO_MSG_EVENT(0, "Blacklisted device detected "
+		CIO_MSG_EVENT(4, "Blacklisted device detected "
 			      "at devno %04X, subchannel set %x\n",
 			      sch->schib.pmcw.dev, sch->schid.ssid);
 		err = -ENODEV;
@@ -647,7 +646,7 @@ do_IRQ (struct pt_regs *regs)
 		 * Make sure that the i/o interrupt did not "overtake"
 		 * the last HZ timer interrupt.
 		 */
-		account_ticks();
+		account_ticks(S390_lowcore.int_clock);
 	/*
 	 * Get interrupt information from lowcore
 	 */
@@ -833,7 +832,7 @@ cio_get_console_subchannel(void)
 }
 
 #endif
-static inline int
+static int
 __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
 {
 	int retry, cc;
@@ -851,7 +850,20 @@ __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
 	return -EBUSY; /* uhm... */
 }
 
-static inline int
+/* 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_subchannel_easy(struct subchannel_id schid)
 {
 	int retry;
@@ -866,16 +878,41 @@ __clear_subchannel_easy(struct subchannel_id schid)
 			if (schid_equal(&ti.schid, &schid))
 				return 0;
 		}
-		udelay(100);
+		udelay_reset(100);
 	}
 	return -EBUSY;
 }
 
+static int pgm_check_occured;
+
+static void cio_reset_pgm_check_handler(void)
+{
+	pgm_check_occured = 1;
+}
+
+static int stsch_reset(struct subchannel_id schid, volatile struct schib *addr)
+{
+	int rc;
+
+	pgm_check_occured = 0;
+	s390_base_pgm_handler_fn = cio_reset_pgm_check_handler;
+	rc = stsch(schid, addr);
+	s390_base_pgm_handler_fn = NULL;
+
+	/* The program check handler could have changed pgm_check_occured. */
+	barrier();
+
+	if (pgm_check_occured)
+		return -EIO;
+	else
+		return rc;
+}
+
 static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
 {
 	struct schib schib;
 
-	if (stsch_err(schid, &schib))
+	if (stsch_reset(schid, &schib))
 		return -ENXIO;
 	if (!schib.pmcw.ena)
 		return 0;
@@ -920,7 +957,7 @@ static void css_reset(void)
 	/* Reset subchannels. */
 	for_each_subchannel(__shutdown_subchannel_easy,  NULL);
 	/* Reset channel paths. */
-	s390_reset_mcck_handler = s390_reset_chpids_mcck_handler;
+	s390_base_mcck_handler_fn = s390_reset_chpids_mcck_handler;
 	/* Enable channel report machine checks. */
 	__ctl_set_bit(14, 28);
 	/* Temporarily reenable machine checks. */
@@ -945,7 +982,7 @@ static void css_reset(void)
 	local_mcck_disable();
 	/* Disable channel report machine checks. */
 	__ctl_clear_bit(14, 28);
-	s390_reset_mcck_handler = NULL;
+	s390_base_mcck_handler_fn = NULL;
 }
 
 static struct reset_call css_reset_call = {
@@ -972,7 +1009,7 @@ static int __reipl_subchannel_match(struct subchannel_id schid, void *data)
 	struct schib schib;
 	struct sch_match_id *match_id = data;
 
-	if (stsch_err(schid, &schib))
+	if (stsch_reset(schid, &schib))
 		return -ENXIO;
 	if (schib.pmcw.dnv &&
 	    (schib.pmcw.dev == match_id->devid.devno) &&