additional s390 patches for 2.6.27

Index: quilt-2.6/drivers/s390/cio/chp.c
===================================================================
@@ -415,8 +415,7 @@ int chp_new(struct chp_id chpid)
 		goto out_free;
 	}
 	/* Get channel-measurement characteristics. */
-	if (css_characteristics_avail && css_chsc_characteristics.scmc
-	    && css_chsc_characteristics.secm) {
+	if (css_chsc_characteristics.scmc && css_chsc_characteristics.secm) {
 		ret = chsc_get_channel_measurement_chars(chp);
 		if (ret)
 			goto out_free;

Index: quilt-2.6/drivers/s390/cio/chsc.h
===================================================================
@@ -78,7 +78,6 @@ struct chsc_ssd_info {
 extern int chsc_get_ssd_info(struct subchannel_id schid,
 			     struct chsc_ssd_info *ssd);
 extern int chsc_determine_css_characteristics(void);
-extern int css_characteristics_avail;
 extern int chsc_alloc_sei_area(void);
 extern void chsc_free_sei_area(void);
 

Index: quilt-2.6/drivers/s390/cio/cmf.c
===================================================================
@@ -1344,8 +1344,7 @@ static int __init init_cmf(void)
 	 * to basic mode.
 	 */
 	if (format == CMF_AUTODETECT) {
-		if (!css_characteristics_avail ||
-		    !css_general_characteristics.ext_mb) {
+		if (!css_general_characteristics.ext_mb) {
 			format = CMF_BASIC;
 		} else {
 			format = CMF_EXTENDED;

Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
@@ -30,8 +30,6 @@ static int max_ssid = 0;
 
 struct channel_subsystem *channel_subsystems[__MAX_CSSID + 1];
 
-int css_characteristics_avail = 0;
-
 int
 for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *data)
 {

@@ -611,7 +609,7 @@ __init_channel_subsystem(struct subchann
 static void __init
 css_generate_pgid(struct channel_subsystem *css, u32 tod_high)
 {
-	if (css_characteristics_avail && css_general_characteristics.mcss) {
+	if (css_general_characteristics.mcss) {
 		css->global_pgid.pgid_high.ext_cssid.version = 0x80;
 		css->global_pgid.pgid_high.ext_cssid.cssid = css->cssid;
 	} else {

@@ -748,8 +746,6 @@ init_channel_subsystem (void)
 	ret = chsc_determine_css_characteristics();
 	if (ret == -ENOMEM)
 		goto out; /* No need to continue. */
-	if (ret == 0)
-		css_characteristics_avail = 1;
 
 	ret = chsc_alloc_sei_area();
 	if (ret)

@@ -793,8 +789,7 @@ init_channel_subsystem (void)
 		ret = device_register(&css->device);
 		if (ret)
 			goto out_free_all;
-		if (css_characteristics_avail &&
-		    css_chsc_characteristics.secm) {
+		if (css_chsc_characteristics.secm) {
 			ret = device_create_file(&css->device,
 						 &dev_attr_cm_enable);
 			if (ret)

@@ -832,7 +827,7 @@ out_unregister:
 		i--;
 		css = channel_subsystems[i];
 		device_unregister(&css->pseudo_subchannel->dev);
-		if (css_characteristics_avail && css_chsc_characteristics.secm)
+		if (css_chsc_characteristics.secm)
 			device_remove_file(&css->device,
 					   &dev_attr_cm_enable);
 		device_unregister(&css->device);

@@ -956,4 +951,3 @@ subsys_initcall(init_channel_subsystem);
 
 MODULE_LICENSE("GPL");
 EXPORT_SYMBOL(css_bus_type);
-EXPORT_SYMBOL_GPL(css_characteristics_avail);

Index: quilt-2.6/drivers/s390/cio/qdio.c
===================================================================
@@ -2354,9 +2354,6 @@ tiqdio_check_chsc_availability(void)
 {
 	char dbf_text[15];
 
-	if (!css_characteristics_avail)
-		return -EIO;
-
 	/* Check for bit 41. */
 	if (!css_general_characteristics.aif) {
 		QDIO_PRINT_WARN("Adapter interruption facility not " \

Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
@@ -24,6 +24,7 @@
 #include <asm/ipl.h>
 #include <asm/chpid.h>
 #include <asm/airq.h>
+#include <asm/isc.h>
 #include <asm/cpu.h>
 #include <asm/fcx.h>
 #include "cio.h"

@@ -699,9 +700,9 @@ void wait_cons_dev(void)
 	if (!console_subchannel_in_use)
 		return;
 
-	/* disable all but isc 1 (console device) */
+	/* disable all but the console isc */
 	__ctl_store (save_cr6, 6, 6);
-	cr6 = 0x40000000;
+	cr6 = 1UL << (31 - CONSOLE_ISC);
 	__ctl_load (cr6, 6, 6);
 
 	do {

@@ -783,10 +784,10 @@ cio_probe_console(void)
 	}
 
 	/*
-	 * enable console I/O-interrupt subclass 1
+	 * enable console I/O-interrupt subclass
 	 */
-	ctl_set_bit(6, 30);
-	console_subchannel.schib.pmcw.isc = 1;
+	ctl_set_bit(6, 31 - CONSOLE_ISC);
+	console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
 	console_subchannel.schib.pmcw.intparm =
 		(u32)(addr_t)&console_subchannel;
 	ret = cio_modify(&console_subchannel);

@@ -802,7 +803,7 @@ cio_release_console(void)
 {
 	console_subchannel.schib.pmcw.intparm = 0;
 	cio_modify(&console_subchannel);
-	ctl_clear_bit(6, 30);
+	ctl_clear_bit(6, 31 - CONSOLE_ISC);
 	console_subchannel_in_use = 0;
 }
 

Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
@@ -13,6 +13,7 @@
 #include <linux/errno.h>
 #include <linux/list.h>
 #include <linux/reboot.h>
+#include <asm/isc.h>
 
 #include "../s390mach.h"
 #include "css.h"

@@ -804,7 +805,8 @@ init_channel_subsystem (void)
 		goto out_pseudo;
 	css_init_done = 1;
 
-	ctl_set_bit(6, 28);
+	/* Enable default isc for I/O subchannels. */
+	ctl_set_bit(6, 31 - IO_SCH_ISC);
 
 	for_each_subchannel(__init_channel_subsystem, NULL);
 	return 0;

Index: quilt-2.6/drivers/s390/cio/device.c
===================================================================
@@ -22,6 +22,7 @@
 #include <asm/cio.h>
 #include <asm/param.h>		/* HZ */
 #include <asm/cmb.h>
+#include <asm/isc.h>
 
 #include "chp.h"
 #include "cio.h"

@@ -1121,7 +1122,7 @@ static void io_subchannel_init_fields(st
 	else
 		sch->opm = chp_get_sch_opm(sch);
 	sch->lpm = sch->schib.pmcw.pam & sch->opm;
-	sch->isc = cio_is_console(sch->schid) ? 1 : 3;
+	sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;
 
 	CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X"
 		      " - PIM = %02X, PAM = %02X, POM = %02X\n",

Index: quilt-2.6/drivers/s390/cio/qdio.h
===================================================================
@@ -2,6 +2,7 @@
 #define _CIO_QDIO_H
 
 #include <asm/page.h>
+#include <asm/isc.h>
 
 #include "schid.h"
 

@@ -26,7 +27,7 @@
  */
 #define IQDIO_FILL_LEVEL_TO_POLL 4
 
-#define TIQDIO_THININT_ISC 3
+#define TIQDIO_THININT_ISC QDIO_AIRQ_ISC
 #define TIQDIO_DELAY_TARGET 0
 #define QDIO_BUSY_BIT_PATIENCE 100 /* in microsecs */
 #define QDIO_BUSY_BIT_GIVE_UP 10000000 /* 10 seconds */

Index: quilt-2.6/include/asm-s390/isc.h
===================================================================
@@ -0,0 +1,18 @@
+#ifndef _ASM_S390_ISC_H
+#define _ASM_S390_ISC_H
+
+/*
+ * I/O interruption subclasses used by drivers.
+ * Please add all used iscs here so that it is possible to distribute
+ * isc usage between drivers.
+ * Reminder: 0 is highest priority, 7 lowest.
+ */
+#define MAX_ISC 7
+
+/* Regular I/O interrupts. */
+#define IO_SCH_ISC 3			/* regular I/O subchannels */
+#define CONSOLE_ISC 1			/* console I/O subchannel */
+/* Adapter interrupts. */
+#define QDIO_AIRQ_ISC IO_SCH_ISC	/* I/O subchannel in qdio mode */
+
+#endif /* _ASM_S390_ISC_H */

Index: quilt-2.6/drivers/s390/cio/airq.c
===================================================================
@@ -15,6 +15,7 @@
 #include <linux/rcupdate.h>
 
 #include <asm/airq.h>
+#include <asm/isc.h>
 
 #include "cio.h"
 #include "cio_debug.h"

@@ -33,15 +34,15 @@ struct airq_t {
 	void *drv_data;
 };
 
-static union indicator_t indicators;
-static struct airq_t *airqs[NR_AIRQS];
+static union indicator_t indicators[MAX_ISC];
+static struct airq_t *airqs[MAX_ISC][NR_AIRQS];
 
-static int register_airq(struct airq_t *airq)
+static int register_airq(struct airq_t *airq, u8 isc)
 {
 	int i;
 
 	for (i = 0; i < NR_AIRQS; i++)
-		if (!cmpxchg(&airqs[i], NULL, airq))
+		if (!cmpxchg(&airqs[isc][i], NULL, airq))
 			return i;
 	return -ENOMEM;
 }

@@ -50,18 +51,21 @@ static int register_airq(struct airq_t *
  * s390_register_adapter_interrupt() - register adapter interrupt handler
  * @handler: adapter handler to be registered
  * @drv_data: driver data passed with each call to the handler
+ * @isc: isc for which the handler should be called
  *
  * Returns:
  *  Pointer to the indicator to be used on success
  *  ERR_PTR() if registration failed
  */
 void *s390_register_adapter_interrupt(adapter_int_handler_t handler,
-				      void *drv_data)
+				      void *drv_data, u8 isc)
 {
 	struct airq_t *airq;
 	char dbf_txt[16];
 	int ret;
 
+	if (isc > MAX_ISC)
+		return ERR_PTR(-EINVAL);
 	airq = kmalloc(sizeof(struct airq_t), GFP_KERNEL);
 	if (!airq) {
 		ret = -ENOMEM;

@@ -69,34 +73,35 @@ void *s390_register_adapter_interrupt(ad
 	}
 	airq->handler = handler;
 	airq->drv_data = drv_data;
-	ret = register_airq(airq);
-	if (ret < 0)
-		kfree(airq);
+
+	ret = register_airq(airq, isc);
 out:
 	snprintf(dbf_txt, sizeof(dbf_txt), "rairq:%d", ret);
 	CIO_TRACE_EVENT(4, dbf_txt);
-	if (ret < 0)
+	if (ret < 0) {
+		kfree(airq);
 		return ERR_PTR(ret);
-	else
-		return &indicators.byte[ret];
+	} else
+		return &indicators[isc].byte[ret];
 }
 EXPORT_SYMBOL(s390_register_adapter_interrupt);
 
 /**
  * s390_unregister_adapter_interrupt - unregister adapter interrupt handler
  * @ind: indicator for which the handler is to be unregistered
+ * @isc: interruption subclass
  */
-void s390_unregister_adapter_interrupt(void *ind)
+void s390_unregister_adapter_interrupt(void *ind, u8 isc)
 {
 	struct airq_t *airq;
 	char dbf_txt[16];
 	int i;
 
-	i = (int) ((addr_t) ind) - ((addr_t) &indicators.byte[0]);
+	i = (int) ((addr_t) ind) - ((addr_t) &indicators[isc].byte[0]);
 	snprintf(dbf_txt, sizeof(dbf_txt), "urairq:%d", i);
 	CIO_TRACE_EVENT(4, dbf_txt);
-	indicators.byte[i] = 0;
-	airq = xchg(&airqs[i], NULL);
+	indicators[isc].byte[i] = 0;
+	airq = xchg(&airqs[isc][i], NULL);
 	/*
 	 * Allow interrupts to complete. This will ensure that the airq handle
 	 * is no longer referenced by any interrupt handler.

@@ -108,7 +113,7 @@ EXPORT_SYMBOL(s390_unregister_adapter_in
 
 #define INDICATOR_MASK	(0xffUL << ((NR_AIRQS_PER_WORD - 1) * 8))
 
-void do_adapter_IO(void)
+void do_adapter_IO(u8 isc)
 {
 	int w;
 	int i;

@@ -120,22 +125,22 @@ void do_adapter_IO(void)
 	 * fetch operations.
 	 */
 	for (w = 0; w < NR_AIRQ_WORDS; w++) {
-		word = indicators.word[w];
+		word = indicators[isc].word[w];
 		i = w * NR_AIRQS_PER_WORD;
 		/*
 		 * Check bytes within word for active indicators.
 		 */
 		while (word) {
 			if (word & INDICATOR_MASK) {
-				airq = airqs[i];
+				airq = airqs[isc][i];
 				if (likely(airq))
-					airq->handler(&indicators.byte[i],
+					airq->handler(&indicators[isc].byte[i],
 						      airq->drv_data);
 				else
 					/*
 					 * Reset ill-behaved indicator.
 					 */
-					indicators.byte[i] = 0;
+					indicators[isc].byte[i] = 0;
 			}
 			word <<= 8;
 			i++;

Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
@@ -641,7 +641,7 @@ do_IRQ (struct pt_regs *regs)
 		 */
 		if (tpi_info->adapter_IO == 1 &&
 		    tpi_info->int_type == IO_INTERRUPT_TYPE) {
-			do_adapter_IO();
+			do_adapter_IO(tpi_info->isc);
 			continue;
 		}
 		sch = (struct subchannel *)(unsigned long)tpi_info->intparm;

Index: quilt-2.6/drivers/s390/cio/cio.h
===================================================================
@@ -106,7 +106,7 @@ int cio_tm_start_key(struct subchannel *
 int cio_tm_intrg(struct subchannel *sch);
 
 int cio_create_sch_lock(struct subchannel *);
-void do_adapter_IO(void);
+void do_adapter_IO(u8 isc);
 void do_IRQ(struct pt_regs *);
 
 /* Use with care. */

Index: quilt-2.6/drivers/s390/cio/qdio.c
===================================================================
@@ -3713,7 +3713,8 @@ tiqdio_register_thinints(void)
 	char dbf_text[20];
 
 	tiqdio_ind =
-		s390_register_adapter_interrupt(&tiqdio_thinint_handler, NULL);
+		s390_register_adapter_interrupt(&tiqdio_thinint_handler, NULL,
+						TIQDIO_THININT_ISC);
 	if (IS_ERR(tiqdio_ind)) {
 		sprintf(dbf_text, "regthn%lx", PTR_ERR(tiqdio_ind));
 		QDIO_DBF_TEXT0(0,setup,dbf_text);

@@ -3729,7 +3730,8 @@ static void
 tiqdio_unregister_thinints(void)
 {
 	if (tiqdio_ind)
-		s390_unregister_adapter_interrupt(tiqdio_ind);
+		s390_unregister_adapter_interrupt(tiqdio_ind,
+						  TIQDIO_THININT_ISC);
 }
 
 static int

Index: quilt-2.6/include/asm-s390/airq.h
===================================================================
@@ -13,7 +13,7 @@
 
 typedef void (*adapter_int_handler_t)(void *, void *);
 
-void *s390_register_adapter_interrupt(adapter_int_handler_t, void *);
-void s390_unregister_adapter_interrupt(void *);
+void *s390_register_adapter_interrupt(adapter_int_handler_t, void *, u8);
+void s390_unregister_adapter_interrupt(void *, u8);
 
 #endif /* _ASM_S390_AIRQ_H */

Index: quilt-2.6/drivers/s390/cio/isc.c
===================================================================
@@ -0,0 +1,68 @@
+/*
+ * Functions for registration of I/O interruption subclasses on s390.
+ *
+ * Copyright IBM Corp. 2008
+ * Authors: Sebastian Ott <[email protected]>
+ */
+
+#include <linux/spinlock.h>
+#include <linux/module.h>
+#include <asm/isc.h>
+
+static unsigned int isc_refs[MAX_ISC + 1];
+static DEFINE_SPINLOCK(isc_ref_lock);
+
+
+/**
+ * isc_register - register an I/O interruption subclass.
+ * @isc: I/O interruption subclass to register
+ *
+ * The number of users for @isc is increased. If this is the first user to
+ * register @isc, the corresponding I/O interruption subclass mask is enabled.
+ *
+ * Context:
+ *   This function must not be called in interrupt context.
+ */
+void isc_register(unsigned int isc)
+{
+	if (isc > MAX_ISC) {
+		WARN_ON(1);
+		return;
+	}
+
+	spin_lock(&isc_ref_lock);
+	if (isc_refs[isc] == 0)
+		ctl_set_bit(6, 31 - isc);
+	isc_refs[isc]++;
+	spin_unlock(&isc_ref_lock);
+}
+EXPORT_SYMBOL_GPL(isc_register);
+
+/**
+ * isc_unregister - unregister an I/O interruption subclass.
+ * @isc: I/O interruption subclass to unregister
+ *
+ * The number of users for @isc is decreased. If this is the last user to
+ * unregister @isc, the corresponding I/O interruption subclass mask is
+ * disabled.
+ * Note: This function must not be called if isc_register() hasn't been called
+ * before by the driver for @isc.
+ *
+ * Context:
+ *   This function must not be called in interrupt context.
+ */
+void isc_unregister(unsigned int isc)
+{
+	spin_lock(&isc_ref_lock);
+	/* check for misuse */
+	if (isc > MAX_ISC || isc_refs[isc] == 0) {
+		WARN_ON(1);
+		goto out_unlock;
+	}
+	if (isc_refs[isc] == 1)
+		ctl_clear_bit(6, 31 - isc);
+	isc_refs[isc]--;
+out_unlock:
+	spin_unlock(&isc_ref_lock);
+}
+EXPORT_SYMBOL_GPL(isc_unregister);

Index: quilt-2.6/include/asm-s390/isc.h
===================================================================
@@ -1,6 +1,8 @@
 #ifndef _ASM_S390_ISC_H
 #define _ASM_S390_ISC_H
 
+#include <linux/types.h>
+
 /*
  * I/O interruption subclasses used by drivers.
  * Please add all used iscs here so that it is possible to distribute

@@ -15,4 +17,8 @@
 /* Adapter interrupts. */
 #define QDIO_AIRQ_ISC IO_SCH_ISC	/* I/O subchannel in qdio mode */
 
+/* Functions for registration of I/O interruption subclasses */
+void isc_register(unsigned int isc);
+void isc_unregister(unsigned int isc);
+
 #endif /* _ASM_S390_ISC_H */

Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
@@ -786,12 +786,13 @@ cio_probe_console(void)
 	/*
 	 * enable console I/O-interrupt subclass
 	 */
-	ctl_set_bit(6, 31 - CONSOLE_ISC);
+	isc_register(CONSOLE_ISC);
 	console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
 	console_subchannel.schib.pmcw.intparm =
 		(u32)(addr_t)&console_subchannel;
 	ret = cio_modify(&console_subchannel);
 	if (ret) {
+		isc_unregister(CONSOLE_ISC);
 		console_subchannel_in_use = 0;
 		return ERR_PTR(ret);
 	}

@@ -803,7 +804,7 @@ cio_release_console(void)
 {
 	console_subchannel.schib.pmcw.intparm = 0;
 	cio_modify(&console_subchannel);
-	ctl_clear_bit(6, 31 - CONSOLE_ISC);
+	isc_unregister(CONSOLE_ISC);
 	console_subchannel_in_use = 0;
 }
 

Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
@@ -806,7 +806,7 @@ init_channel_subsystem (void)
 	css_init_done = 1;
 
 	/* Enable default isc for I/O subchannels. */
-	ctl_set_bit(6, 31 - IO_SCH_ISC);
+	isc_register(IO_SCH_ISC);
 
 	for_each_subchannel(__init_channel_subsystem, NULL);
 	return 0;

Index: quilt-2.6/drivers/s390/cio/qdio.c
===================================================================
@@ -3892,6 +3892,7 @@ init_QDIO(void)
 					    qdio_mempool_alloc,
 					    qdio_mempool_free, NULL);
 
+	isc_register(QDIO_AIRQ_ISC);
 	if (tiqdio_check_chsc_availability())
 		QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
 

@@ -3904,6 +3905,7 @@ static void __exit
 cleanup_QDIO(void)
 {
 	tiqdio_unregister_thinints();
+	isc_unregister(QDIO_AIRQ_ISC);
 	qdio_remove_procfs_entry();
 	qdio_release_qdio_memory();
 	qdio_unregister_dbf_views();

Index: quilt-2.6/drivers/s390/cio/chp.c
===================================================================
@@ -525,7 +525,7 @@ static void chp_process_crw(struct crw *
 	}
 }
 
-int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct res_acc_data *data)
+int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct chp_link *link)
 {
 	int i;
 	int mask;

@@ -534,10 +534,10 @@ int chp_ssd_get_mask(struct chsc_ssd_inf
 		mask = 0x80 >> i;
 		if (!(ssd->path_mask & mask))
 			continue;
-		if (!chp_id_is_equal(&ssd->chpid[i], &data->chpid))
+		if (!chp_id_is_equal(&ssd->chpid[i], &link->chpid))
 			continue;
 		if ((ssd->fla_valid_mask & mask) &&
-		    ((ssd->fla[i] & data->fla_mask) != data->fla))
+		    ((ssd->fla[i] & link->fla_mask) != link->fla))
 			continue;
 		return mask;
 	}

Index: quilt-2.6/drivers/s390/cio/chp.h
===================================================================
@@ -24,7 +24,7 @@
 #define CHP_VARY_ON 2
 #define CHP_VARY_OFF 3
 
-struct res_acc_data {
+struct chp_link {
 	struct chp_id chpid;
 	u32 fla_mask;
 	u16 fla;

@@ -60,5 +60,5 @@ int chp_new(struct chp_id chpid);
 void chp_cfg_schedule(struct chp_id chpid, int configure);
 void chp_cfg_cancel_deconfigure(struct chp_id chpid);
 int chp_info_get_status(struct chp_id chpid);
-int chp_ssd_get_mask(struct chsc_ssd_info *, struct res_acc_data *);
+int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
 #endif /* S390_CHP_H */

140 lines not on this page · raw message

Index: quilt-2.6/drivers/s390/cio/css.h
===================================================================
@@ -59,6 +59,7 @@ struct pgid {
 } __attribute__ ((packed));
 
 struct subchannel;
+struct chp_link;
 /**
  * struct css_driver - device driver for subchannels
  * @owner: owning module

@@ -77,7 +78,7 @@ struct css_driver {
 	unsigned int subchannel_type;
 	struct device_driver drv;
 	void (*irq)(struct subchannel *);
-	int (*chp_event)(struct subchannel *, void *, int);
+	int (*chp_event)(struct subchannel *, struct chp_link *, int);
 	int (*sch_event)(struct subchannel *, int);
 	int (*probe)(struct subchannel *);
 	int (*remove)(struct subchannel *);

Index: quilt-2.6/drivers/s390/cio/device.c
===================================================================
@@ -128,7 +128,8 @@ static int io_subchannel_probe(struct su
 static int io_subchannel_remove(struct subchannel *);
 static void io_subchannel_shutdown(struct subchannel *);
 static int io_subchannel_sch_event(struct subchannel *, int);
-static int io_subchannel_chp_event(struct subchannel *, void *, int);
+static int io_subchannel_chp_event(struct subchannel *, struct chp_link *,
+				   int);
 
 static struct css_driver io_subchannel_driver = {
 	.owner = THIS_MODULE,

@@ -1329,14 +1330,12 @@ static void io_subchannel_terminate_path
 
 }
 
-static int io_subchannel_chp_event(struct subchannel *sch, void *data,
-				   int event)
+static int io_subchannel_chp_event(struct subchannel *sch,
+				   struct chp_link *link, int event)
 {
 	int mask;
-	struct res_acc_data *res_data;
 
-	res_data = data;
-	mask = chp_ssd_get_mask(&sch->ssd_info, res_data);
+	mask = chp_ssd_get_mask(&sch->ssd_info, link);
 	if (!mask)
 		return 0;
 	switch (event) {

Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
@@ -850,19 +850,16 @@ int sch_is_pseudo_sch(struct subchannel 
 	return sch == to_css(sch->dev.parent)->pseudo_subchannel;
 }
 
-/*
- * find a driver for a subchannel. They identify by the subchannel
- * type with the exception that the console subchannel driver has its own
- * subchannel type although the device is an i/o subchannel
- */
-static int
-css_bus_match (struct device *dev, struct device_driver *drv)
+static int css_bus_match(struct device *dev, struct device_driver *drv)
 {
 	struct subchannel *sch = to_subchannel(dev);
 	struct css_driver *driver = to_cssdriver(drv);
+	struct css_device_id *id;
 
-	if (sch->st == driver->subchannel_type)
-		return 1;
+	for (id = driver->subchannel_type; id->match_flags; id++) {
+		if (sch->st == id->type)
+			return 1;
+	}
 
 	return 0;
 }

Index: quilt-2.6/drivers/s390/cio/css.h
===================================================================
@@ -75,7 +75,7 @@ struct chp_link;
  */
 struct css_driver {
 	struct module *owner;
-	unsigned int subchannel_type;
+	struct css_device_id *subchannel_type;
 	struct device_driver drv;
 	void (*irq)(struct subchannel *);
 	int (*chp_event)(struct subchannel *, struct chp_link *, int);

Index: quilt-2.6/drivers/s390/cio/device.c
===================================================================
@@ -131,9 +131,15 @@ static int io_subchannel_sch_event(struc
 static int io_subchannel_chp_event(struct subchannel *, struct chp_link *,
 				   int);
 
+static struct css_device_id io_subchannel_ids[] = {
+	{ .match_flags = 0x1, .type = SUBCHANNEL_TYPE_IO, },
+	{ /* end of list */ },
+};
+MODULE_DEVICE_TABLE(css, io_subchannel_ids);
+
 static struct css_driver io_subchannel_driver = {
 	.owner = THIS_MODULE,
-	.subchannel_type = SUBCHANNEL_TYPE_IO,
+	.subchannel_type = io_subchannel_ids,
 	.name = "io_subchannel",
 	.irq = io_subchannel_irq,
 	.sch_event = io_subchannel_sch_event,

Index: quilt-2.6/include/linux/mod_devicetable.h
===================================================================
@@ -161,8 +161,8 @@ struct ap_device_id {
 
 /* s390 css bus devices (subchannels) */
 struct css_device_id {
+	__u8 match_flags;
 	__u8 type; /* subchannel type */
-	__u8 pad1;
 	__u16 pad2;
 	__u32 pad3;
 	kernel_ulong_t driver_data;

Index: quilt-2.6/drivers/s390/cio/chp.c
===================================================================
@@ -624,6 +624,7 @@ static void cfg_func(struct work_struct 
 {
 	struct chp_id chpid;
 	enum cfg_task_t t;
+	int rc;
 
 	mutex_lock(&cfg_lock);
 	t = cfg_none;

@@ -638,14 +639,24 @@ static void cfg_func(struct work_struct 
 
 	switch (t) {
 	case cfg_configure:
-		sclp_chp_configure(chpid);
-		info_expire();
-		chsc_chp_online(chpid);
+		rc = sclp_chp_configure(chpid);
+		if (rc)
+			CIO_MSG_EVENT(2, "chp: sclp_chp_configure(%x.%02x)="
+				      "%d\n", chpid.cssid, chpid.id, rc);
+		else {
+			info_expire();
+			chsc_chp_online(chpid);
+		}
 		break;
 	case cfg_deconfigure:
-		sclp_chp_deconfigure(chpid);
-		info_expire();
-		chsc_chp_offline(chpid);
+		rc = sclp_chp_deconfigure(chpid);
+		if (rc)
+			CIO_MSG_EVENT(2, "chp: sclp_chp_deconfigure(%x.%02x)="
+				      "%d\n", chpid.cssid, chpid.id, rc);
+		else {
+			info_expire();
+			chsc_chp_offline(chpid);
+		}
 		break;
 	case cfg_none:
 		/* Get updated information after last change. */

Index: quilt-2.6/drivers/s390/cio/chp.c
===================================================================
@@ -407,7 +407,7 @@ int chp_new(struct chp_id chpid)
 		 chpid.id);
 
 	/* Obtain channel path description and fill it in. */
-	ret = chsc_determine_channel_path_description(chpid, &chp->desc);
+	ret = chsc_determine_base_channel_path_desc(chpid, &chp->desc);
 	if (ret)
 		goto out_free;
 	if ((chp->desc.flags & 0x80) == 0) {

92 lines not on this page · raw message

Index: quilt-2.6/drivers/s390/cio/chsc.h
===================================================================
@@ -4,7 +4,8 @@
 #include <linux/types.h>
 #include <linux/device.h>
 #include <asm/chpid.h>
-#include "schid.h"
+#include <asm/chsc.h>
+#include <asm/schid.h>
 
 #define CHSC_SDA_OC_MSS   0x2
 

@@ -37,11 +38,14 @@ struct channel_path_desc {
 struct channel_path;
 
 struct css_general_char {
-	u64 : 41;
+	u64 : 12;
+	u32 dynio : 1;	 /* bit 12 */
+	u32 : 28;
 	u32 aif : 1;     /* bit 41 */
 	u32 : 3;
 	u32 mcss : 1;    /* bit 45 */
-	u32 : 2;
+	u32 fcs : 1;	 /* bit 46 */
+	u32 : 1;
 	u32 ext_mb : 1;  /* bit 48 */
 	u32 : 7;
 	u32 aif_tdd : 1; /* bit 56 */

@@ -49,7 +53,9 @@ struct css_general_char {
 	u32 qebsm : 1;   /* bit 58 */
 	u32 : 8;
 	u32 aif_osa : 1; /* bit 67 */
-	u32 : 20;
+	u32 : 14;
+	u32 cib : 1;	 /* bit 82 */
+	u32 : 5;
 	u32 fcx : 1;	 /* bit 88 */
 	u32 : 7;
 }__attribute__((packed));

@@ -86,8 +92,11 @@ struct channel_subsystem;
 extern int chsc_secm(struct channel_subsystem *, int);
 
 int chsc_chp_vary(struct chp_id chpid, int on);
-int chsc_determine_channel_path_description(struct chp_id chpid,
-					    struct channel_path_desc *desc);
+int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
+				     int c, int m,
+				     struct chsc_response_struct *resp);
+int chsc_determine_base_channel_path_desc(struct chp_id chpid,
+					  struct channel_path_desc *desc);
 void chsc_chp_online(struct chp_id chpid);
 void chsc_chp_offline(struct chp_id chpid);
 int chsc_get_channel_measurement_chars(struct channel_path *chp);

820 lines not on this page · raw message

Index: quilt-2.6/drivers/s390/cio/chsc_sch.h
===================================================================
@@ -0,0 +1,13 @@
+#ifndef _CHSC_SCH_H
+#define _CHSC_SCH_H
+
+struct chsc_request {
+	struct completion completion;
+	struct irb irb;
+};
+
+struct chsc_private {
+	struct chsc_request *request;
+};
+
+#endif

Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
@@ -877,6 +877,12 @@ __clear_io_subchannel_easy(struct subcha
 	return -EBUSY;
 }
 
+static void __clear_chsc_subchannel_easy(void)
+{
+	/* It seems we can only wait for a bit here :/ */
+	udelay_reset(100);
+}
+
 static int pgm_check_occured;
 
 static void cio_reset_pgm_check_handler(void)

@@ -920,6 +926,9 @@ static int __shutdown_subchannel_easy(st
 			if (__clear_io_subchannel_easy(schid))
 				goto out; /* give up... */
 			break;
+		case SUBCHANNEL_TYPE_CHSC:
+			__clear_chsc_subchannel_easy();
+			break;
 		default:
 			/* No default clear strategy */
 			break;

Index: quilt-2.6/drivers/s390/cio/cio.h
===================================================================
@@ -7,8 +7,8 @@
 #include <asm/chpid.h>
 #include <asm/cio.h>
 #include <asm/fcx.h>
+#include <asm/schid.h>
 #include "chsc.h"
-#include "schid.h"
 
 /*
  * path management control word

Index: quilt-2.6/drivers/s390/cio/css.h
===================================================================
@@ -9,8 +9,7 @@
 
 #include <asm/cio.h>
 #include <asm/chpid.h>
-
-#include "schid.h"
+#include <asm/schid.h>
 
 /*
  * path grouping stuff

Index: quilt-2.6/drivers/s390/cio/idset.h
===================================================================
@@ -8,7 +8,7 @@
 #ifndef S390_IDSET_H
 #define S390_IDSET_H S390_IDSET_H
 
-#include "schid.h"
+#include <asm/schid.h>
 
 struct idset;
 

Index: quilt-2.6/drivers/s390/cio/ioasm.h
===================================================================
@@ -2,7 +2,7 @@
 #define S390_CIO_IOASM_H
 
 #include <asm/chpid.h>
-#include "schid.h"
+#include <asm/schid.h>
 
 /*
  * TPI info structure

Index: quilt-2.6/drivers/s390/cio/io_sch.h
===================================================================
@@ -1,7 +1,7 @@
 #ifndef S390_IO_SCH_H
 #define S390_IO_SCH_H
 
-#include "schid.h"
+#include <asm/schid.h>
 
 /*
  * command-mode operation request block

Index: quilt-2.6/drivers/s390/cio/qdio.h
===================================================================
@@ -3,8 +3,7 @@
 
 #include <asm/page.h>
 #include <asm/isc.h>
-
-#include "schid.h"
+#include <asm/schid.h>
 
 #ifdef CONFIG_QDIO_DEBUG
 #define QDIO_VERBOSE_LEVEL 9

Index: quilt-2.6/drivers/s390/cio/schid.h
===================================================================
@@ -1,26 +0,0 @@
-#ifndef S390_SCHID_H
-#define S390_SCHID_H
-
-struct subchannel_id {
-	__u32 reserved:13;
-	__u32 ssid:2;
-	__u32 one:1;
-	__u32 sch_no:16;
-} __attribute__ ((packed,aligned(4)));
-
-
-/* Helper function for sane state of pre-allocated subchannel_id. */
-static inline void
-init_subchannel_id(struct subchannel_id *schid)
-{
-	memset(schid, 0, sizeof(struct subchannel_id));
-	schid->one = 1;
-}
-
-static inline int
-schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
-{
-	return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
-}
-
-#endif /* S390_SCHID_H */

Index: quilt-2.6/include/asm-s390/chpid.h
===================================================================
@@ -10,7 +10,6 @@
 
 #include <linux/string.h>
 #include <asm/types.h>
-#include <asm/cio.h>
 
 #define __MAX_CHPID 255
 

@@ -41,6 +40,9 @@ static inline void chp_id_next(struct ch
 	}
 }
 
+#ifdef __KERNEL__
+#include <asm/cio.h>
+
 static inline int chp_id_is_valid(struct chp_id *chpid)
 {
 	return (chpid->cssid <= __MAX_CSSID);

@@ -49,5 +51,6 @@ static inline int chp_id_is_valid(struct
 
 #define chp_id_for_each(c) \
 	for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
+#endif /* __KERNEL */
 
 #endif /* _ASM_S390_CHPID_H */

127 lines not on this page · raw message

Index: quilt-2.6/include/asm-s390/isc.h
===================================================================
@@ -14,6 +14,7 @@
 /* Regular I/O interrupts. */
 #define IO_SCH_ISC 3			/* regular I/O subchannels */
 #define CONSOLE_ISC 1			/* console I/O subchannel */
+#define CHSC_SCH_ISC 7			/* CHSC subchannels */
 /* Adapter interrupts. */
 #define QDIO_AIRQ_ISC IO_SCH_ISC	/* I/O subchannel in qdio mode */
 

Index: quilt-2.6/include/asm-s390/schid.h
===================================================================
@@ -0,0 +1,28 @@
+#ifndef ASM_SCHID_H
+#define ASM_SCHID_H
+
+struct subchannel_id {
+	__u32 cssid : 8;
+	__u32 : 4;
+	__u32 m : 1;
+	__u32 ssid : 2;
+	__u32 one : 1;
+	__u32 sch_no : 16;
+} __attribute__ ((packed, aligned(4)));
+
+
+/* Helper function for sane state of pre-allocated subchannel_id. */
+static inline void
+init_subchannel_id(struct subchannel_id *schid)
+{
+	memset(schid, 0, sizeof(struct subchannel_id));
+	schid->one = 1;
+}
+
+static inline int
+schid_equal(struct subchannel_id *schid1, struct subchannel_id *schid2)
+{
+	return !memcmp(schid1, schid2, sizeof(struct subchannel_id));
+}
+
+#endif /* ASM_SCHID_H */

Index: quilt-2.6/arch/s390/kernel/process.c
===================================================================
@@ -75,46 +75,19 @@ unsigned long thread_saved_pc(struct tas
 	return sf->gprs[8];
 }
 
-/*
- * Need to know about CPUs going idle?
- */
-static ATOMIC_NOTIFIER_HEAD(idle_chain);
 DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
 
-int register_idle_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_register(&idle_chain, nb);
-}
-EXPORT_SYMBOL(register_idle_notifier);
-
-int unregister_idle_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_unregister(&idle_chain, nb);
-}
-EXPORT_SYMBOL(unregister_idle_notifier);
-
 static int s390_idle_enter(void)
 {
 	struct s390_idle_data *idle;
-	int nr_calls = 0;
-	void *hcpu;
-	int rc;
 
-	hcpu = (void *)(long)smp_processor_id();
-	rc = __atomic_notifier_call_chain(&idle_chain, S390_CPU_IDLE, hcpu, -1,
-					  &nr_calls);
-	if (rc == NOTIFY_BAD) {
-		nr_calls--;
-		__atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
-					     hcpu, nr_calls, NULL);
-		return rc;
-	}
 	idle = &__get_cpu_var(s390_idle);
 	spin_lock(&idle->lock);
 	idle->idle_count++;
 	idle->in_idle = 1;
 	idle->idle_enter = get_clock();
 	spin_unlock(&idle->lock);
+	vtime_stop_cpu_timer();
 	return NOTIFY_OK;
 }
 

@@ -122,13 +95,12 @@ void s390_idle_leave(void)
 {
 	struct s390_idle_data *idle;
 
+	vtime_start_cpu_timer();
 	idle = &__get_cpu_var(s390_idle);
 	spin_lock(&idle->lock);
 	idle->idle_time += get_clock() - idle->idle_enter;
 	idle->in_idle = 0;
 	spin_unlock(&idle->lock);
-	atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
-				   (void *)(long) smp_processor_id());
 }
 
 extern void s390_handle_mcck(void);

Index: quilt-2.6/arch/s390/kernel/vtime.c
===================================================================
@@ -136,7 +136,7 @@ static inline void set_vtimer(__u64 expi
 }
 #endif
 
-static void start_cpu_timer(void)
+void vtime_start_cpu_timer(void)
 {
 	struct vtimer_queue *vt_list;
 

@@ -150,7 +150,7 @@ static void start_cpu_timer(void)
 		set_vtimer(vt_list->idle);
 }
 
-static void stop_cpu_timer(void)
+void vtime_stop_cpu_timer(void)
 {
 	struct vtimer_queue *vt_list;
 

@@ -536,24 +536,6 @@ void init_cpu_vtimer(void)
 
 }
 
-static int vtimer_idle_notify(struct notifier_block *self,
-			      unsigned long action, void *hcpu)
-{
-	switch (action) {
-	case S390_CPU_IDLE:
-		stop_cpu_timer();
-		break;
-	case S390_CPU_NOT_IDLE:
-		start_cpu_timer();
-		break;
-	}
-	return NOTIFY_OK;
-}
-
-static struct notifier_block vtimer_idle_nb = {
-	.notifier_call = vtimer_idle_notify,
-};
-
 void __init vtime_init(void)
 {
 	/* request the cpu timer external interrupt */

@@ -561,9 +543,6 @@ void __init vtime_init(void)
 					      &ext_int_info_timer) != 0)
 		panic("Couldn't request external interrupt 0x1005");
 
-	if (register_idle_notifier(&vtimer_idle_nb))
-		panic("Couldn't register idle notifier");
-
 	/* Enable cpu timer interrupts on the boot cpu. */
 	init_cpu_vtimer();
 }

Index: quilt-2.6/include/asm-s390/processor.h
===================================================================
@@ -336,16 +336,6 @@ extern void (*s390_base_mcck_handler_fn)
 extern void (*s390_base_pgm_handler_fn)(void);
 extern void (*s390_base_ext_handler_fn)(void);
 
-/*
- * CPU idle notifier chain.
- */
-#define S390_CPU_IDLE		0
-#define S390_CPU_NOT_IDLE	1
-
-struct notifier_block;
-int register_idle_notifier(struct notifier_block *nb);
-int unregister_idle_notifier(struct notifier_block *nb);
-
 #define ARCH_LOW_ADDRESS_LIMIT	0x7fffffffUL
 
 #endif

Index: quilt-2.6/include/asm-s390/timer.h
===================================================================
@@ -48,6 +48,18 @@ extern int del_virt_timer(struct vtimer_
 extern void init_cpu_vtimer(void);
 extern void vtime_init(void);
 
+#ifdef CONFIG_VIRT_TIMER
+
+extern void vtime_start_cpu_timer(void);
+extern void vtime_stop_cpu_timer(void);
+
+#else
+
+static inline void vtime_start_cpu_timer(void) { }
+static inline void vtime_stop_cpu_timer(void) { }
+
+#endif /* CONFIG_VIRT_TIMER */
+
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_S390_TIMER_H */

Index: quilt-2.6/drivers/s390/char/sclp_vt220.c
===================================================================
@@ -82,8 +82,8 @@ static struct sclp_vt220_request *sclp_v
 /* Number of characters in current request buffer */
 static int sclp_vt220_buffered_chars;
 
-/* Flag indicating whether this driver has already been initialized */
-static int sclp_vt220_initialized = 0;
+/* Counter controlling core driver initialization. */
+static int __initdata sclp_vt220_init_count;
 
 /* Flag indicating that sclp_vt220_current_request should really
  * have been already queued but wasn't because the SCLP was processing

@@ -609,10 +609,8 @@ sclp_vt220_flush_buffer(struct tty_struc
 	sclp_vt220_emit_current();
 }
 
-/*
- * Initialize all relevant components and register driver with system.
- */
-static void __init __sclp_vt220_cleanup(void)
+/* Release allocated pages. */
+static void __init __sclp_vt220_free_pages(void)
 {
 	struct list_head *page, *p;
 

@@ -623,21 +621,30 @@ static void __init __sclp_vt220_cleanup(
 		else
 			free_bootmem((unsigned long) page, PAGE_SIZE);
 	}
-	if (!list_empty(&sclp_vt220_register.list))
-		sclp_unregister(&sclp_vt220_register);
-	sclp_vt220_initialized = 0;
 }
 
-static int __init __sclp_vt220_init(void)
+/* Release memory and unregister from sclp core. Controlled by init counting -
+ * only the last invoker will actually perform these actions. */
+static void __init __sclp_vt220_cleanup(void)
+{
+	sclp_vt220_init_count--;
+	if (sclp_vt220_init_count != 0)
+		return;
+	sclp_unregister(&sclp_vt220_register);
+	__sclp_vt220_free_pages();
+}
+
+/* Allocate buffer pages and register with sclp core. Controlled by init
+ * counting - only the first invoker will actually perform these actions. */
+static int __init __sclp_vt220_init(int num_pages)
 {
 	void *page;
 	int i;
-	int num_pages;
 	int rc;
 
-	if (sclp_vt220_initialized)
+	sclp_vt220_init_count++;
+	if (sclp_vt220_init_count != 1)
 		return 0;
-	sclp_vt220_initialized = 1;
 	spin_lock_init(&sclp_vt220_lock);
 	INIT_LIST_HEAD(&sclp_vt220_empty);
 	INIT_LIST_HEAD(&sclp_vt220_outqueue);

@@ -649,24 +656,22 @@ static int __init __sclp_vt220_init(void
 	sclp_vt220_flush_later = 0;
 
 	/* Allocate pages for output buffering */
-	num_pages = slab_is_available() ? MAX_KMEM_PAGES : MAX_CONSOLE_PAGES;
 	for (i = 0; i < num_pages; i++) {
 		if (slab_is_available())
 			page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
 		else
 			page = alloc_bootmem_low_pages(PAGE_SIZE);
 		if (!page) {
-			__sclp_vt220_cleanup();
-			return -ENOMEM;
+			rc = -ENOMEM;
+			goto out;
 		}
 		list_add_tail((struct list_head *) page, &sclp_vt220_empty);
 	}
 	rc = sclp_register(&sclp_vt220_register);
+out:
 	if (rc) {
-		printk(KERN_ERR SCLP_VT220_PRINT_HEADER
-		       "could not register vt220 - "
-		       "sclp_register returned %d\n", rc);
-		__sclp_vt220_cleanup();
+		__sclp_vt220_free_pages();
+		sclp_vt220_init_count--;
 	}
 	return rc;
 }

@@ -689,15 +694,13 @@ static int __init sclp_vt220_tty_init(vo
 {
 	struct tty_driver *driver;
 	int rc;
-	int cleanup;
 
 	/* Note: we're not testing for CONSOLE_IS_SCLP here to preserve
 	 * symmetry between VM and LPAR systems regarding ttyS1. */
 	driver = alloc_tty_driver(1);
 	if (!driver)
 		return -ENOMEM;
-	cleanup = !sclp_vt220_initialized;
-	rc = __sclp_vt220_init();
+	rc = __sclp_vt220_init(MAX_KMEM_PAGES);
 	if (rc)
 		goto out_driver;
 

@@ -723,8 +726,7 @@ static int __init sclp_vt220_tty_init(vo
 	return 0;
 
 out_init:
-	if (cleanup)
-		__sclp_vt220_cleanup();
+	__sclp_vt220_cleanup();
 out_driver:
 	put_tty_driver(driver);
 	return rc;

@@ -773,10 +775,9 @@ sclp_vt220_con_init(void)
 {
 	int rc;
 
-	INIT_LIST_HEAD(&sclp_vt220_register.list);
 	if (!CONSOLE_IS_SCLP)
 		return 0;
-	rc = __sclp_vt220_init();
+	rc = __sclp_vt220_init(MAX_CONSOLE_PAGES);
 	if (rc)
 		return rc;
 	/* Attach linux console */

Index: quilt-2.6/drivers/s390/crypto/ap_bus.c
===================================================================
@@ -34,13 +34,15 @@
 #include <linux/mutex.h>
 #include <asm/s390_rdev.h>
 #include <asm/reset.h>
+#include <linux/hrtimer.h>
+#include <linux/ktime.h>
 
 #include "ap_bus.h"
 
 /* Some prototypes. */
 static void ap_scan_bus(struct work_struct *);
 static void ap_poll_all(unsigned long);
-static void ap_poll_timeout(unsigned long);
+static enum hrtimer_restart ap_poll_timeout(struct hrtimer *);
 static int ap_poll_thread_start(void);
 static void ap_poll_thread_stop(void);
 static void ap_request_timeout(unsigned long);

@@ -80,12 +82,15 @@ static DECLARE_WORK(ap_config_work, ap_s
 /*
  * Tasklet & timer for AP request polling.
  */
-static struct timer_list ap_poll_timer = TIMER_INITIALIZER(ap_poll_timeout,0,0);
 static DECLARE_TASKLET(ap_tasklet, ap_poll_all, 0);
 static atomic_t ap_poll_requests = ATOMIC_INIT(0);
 static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait);
 static struct task_struct *ap_poll_kthread = NULL;
 static DEFINE_MUTEX(ap_poll_thread_mutex);
+static struct hrtimer ap_poll_timer;
+/* In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds.
+ * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.*/
+static unsigned long long poll_timeout = 250000;
 
 /**
  * ap_intructions_available() - Test if AP instructions are available.

@@ -636,11 +641,39 @@ static ssize_t ap_poll_thread_store(stru
 
 static BUS_ATTR(poll_thread, 0644, ap_poll_thread_show, ap_poll_thread_store);
 
+static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
+}
+
+static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
+				  size_t count)
+{
+	unsigned long long time;
+	ktime_t hr_time;
+
+	/* 120 seconds = maximum poll interval */
+	if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 || time > 120000000000)
+		return -EINVAL;
+	poll_timeout = time;
+	hr_time = ktime_set(0, poll_timeout);
+
+	if (!hrtimer_is_queued(&ap_poll_timer) ||
+	    !hrtimer_forward(&ap_poll_timer, ap_poll_timer.expires, hr_time)) {
+		ap_poll_timer.expires = hr_time;
+		hrtimer_start(&ap_poll_timer, hr_time, HRTIMER_MODE_ABS);
+	}
+	return count;
+}
+
+static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store);
+
 static struct bus_attribute *const ap_bus_attrs[] = {
 	&bus_attr_ap_domain,
 	&bus_attr_config_time,
 	&bus_attr_poll_thread,
-	NULL
+	&bus_attr_poll_timeout,
+	NULL,
 };
 
 /**

@@ -895,9 +928,10 @@ ap_config_timeout(unsigned long ptr)
  */
 static inline void ap_schedule_poll_timer(void)
 {
-	if (timer_pending(&ap_poll_timer))
+	if (hrtimer_is_queued(&ap_poll_timer))
 		return;
-	mod_timer(&ap_poll_timer, jiffies + AP_POLL_TIME);
+	hrtimer_start(&ap_poll_timer, ktime_set(0, poll_timeout),
+		      HRTIMER_MODE_ABS);
 }
 
 /**

@@ -1115,13 +1149,14 @@ EXPORT_SYMBOL(ap_cancel_message);
 
 /**
  * ap_poll_timeout(): AP receive polling for finished AP requests.
- * @unused: Unused variable.
+ * @unused: Unused pointer.
  *
- * Schedules the AP tasklet.
+ * Schedules the AP tasklet using a high resolution timer.
  */
-static void ap_poll_timeout(unsigned long unused)
+static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused)
 {
 	tasklet_schedule(&ap_tasklet);
+	return HRTIMER_NORESTART;
 }
 
 /**

@@ -1344,6 +1379,14 @@ int __init ap_module_init(void)
 	ap_config_timer.expires = jiffies + ap_config_time * HZ;
 	add_timer(&ap_config_timer);
 
+	/* Setup the high resultion poll timer.
+	 * If we are running under z/VM adjust polling to z/VM polling rate.
+	 */
+	if (MACHINE_IS_VM)
+		poll_timeout = 1500000;
+	hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+	ap_poll_timer.function = ap_poll_timeout;
+
 	/* Start the low priority AP bus poll thread. */
 	if (ap_thread_flag) {
 		rc = ap_poll_thread_start();

@@ -1355,7 +1398,7 @@ int __init ap_module_init(void)
 
 out_work:
 	del_timer_sync(&ap_config_timer);
-	del_timer_sync(&ap_poll_timer);
+	hrtimer_cancel(&ap_poll_timer);
 	destroy_workqueue(ap_work_queue);
 out_root:
 	s390_root_dev_unregister(ap_root_device);

@@ -1386,7 +1429,7 @@ void ap_module_exit(void)
 	ap_reset_domain();
 	ap_poll_thread_stop();
 	del_timer_sync(&ap_config_timer);
-	del_timer_sync(&ap_poll_timer);
+	hrtimer_cancel(&ap_poll_timer);
 	destroy_workqueue(ap_work_queue);
 	tasklet_kill(&ap_tasklet);
 	s390_root_dev_unregister(ap_root_device);

Index: quilt-2.6/arch/s390/kernel/early.c
===================================================================
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/pfn.h>
 #include <linux/uaccess.h>
+#include <asm/ebcdic.h>
 #include <asm/ipl.h>
 #include <asm/lowcore.h>
 #include <asm/processor.h>

@@ -26,12 +27,40 @@
 /*
  * Create a Kernel NSS if the SAVESYS= parameter is defined
  */
-#define DEFSYS_CMD_SIZE		96
+#define DEFSYS_CMD_SIZE		128
 #define SAVESYS_CMD_SIZE	32
 
 char kernel_nss_name[NSS_NAME_SIZE + 1];
 
+static void __init setup_boot_command_line(void);
+
+
 #ifdef CONFIG_SHARED_KERNEL
+int __init savesys_ipl_nss(char *cmd, const int cmdlen);
+
+asm(
+	"	.section .init.text,\"ax\",@progbits\n"
+	"	.align	4\n"
+	"	.type	savesys_ipl_nss, @function\n"
+	"savesys_ipl_nss:\n"
+#ifdef CONFIG_64BIT
+	"	stmg	6,15,48(15)\n"
+	"	lgr	14,3\n"
+	"	sam31\n"
+	"	diag	2,14,0x8\n"
+	"	sam64\n"
+	"	lgr	2,14\n"
+	"	lmg	6,15,48(15)\n"
+#else
+	"	stm	6,15,24(15)\n"
+	"	lr	14,3\n"
+	"	diag	2,14,0x8\n"
+	"	lr	2,14\n"
+	"	lm	6,15,24(15)\n"
+#endif
+	"	br	14\n"
+	"	.size	savesys_ipl_nss, .-savesys_ipl_nss\n");
+
 static noinline __init void create_kernel_nss(void)
 {
 	unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size;

@@ -39,6 +68,7 @@ static noinline __init void create_kerne
 	unsigned int sinitrd_pfn, einitrd_pfn;
 #endif
 	int response;
+	size_t len;
 	char *savesys_ptr;
 	char upper_command_line[COMMAND_LINE_SIZE];
 	char defsys_cmd[DEFSYS_CMD_SIZE];

@@ -49,8 +79,8 @@ static noinline __init void create_kerne
 		return;
 
 	/* Convert COMMAND_LINE to upper case */
-	for (i = 0; i < strlen(COMMAND_LINE); i++)
-		upper_command_line[i] = toupper(COMMAND_LINE[i]);
+	for (i = 0; i < strlen(boot_command_line); i++)
+		upper_command_line[i] = toupper(boot_command_line[i]);
 
 	savesys_ptr = strstr(upper_command_line, "SAVESYS=");
 

@@ -83,7 +113,8 @@ static noinline __init void create_kerne
 	}
 #endif
 
-	sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK", defsys_cmd, min_size);
+	sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK PARMREGS=0-13",
+		defsys_cmd, min_size);
 	sprintf(savesys_cmd, "SAVESYS %s \n IPL %s",
 		kernel_nss_name, kernel_nss_name);
 

@@ -94,13 +125,24 @@ static noinline __init void create_kerne
 		return;
 	}
 
-	__cpcmd(savesys_cmd, NULL, 0, &response);
-
-	if (response != strlen(savesys_cmd)) {
+	len = strlen(savesys_cmd);
+	ASCEBC(savesys_cmd, len);
+	response = savesys_ipl_nss(savesys_cmd, len);
+
+	/* On success: response is equal to the command size,
+	 *	       max SAVESYS_CMD_SIZE
+	 * On error: response contains the numeric portion of cp error message.
+	 *	     for SAVESYS it will be >= 263
+	 */
+	if (response > SAVESYS_CMD_SIZE) {
 		kernel_nss_name[0] = '\0';
 		return;
 	}
 
+	/* re-setup boot command line with new ipl vm parms */
+	ipl_update_parameters();
+	setup_boot_command_line();
+
 	ipl_flags = IPL_NSS_VALID;
 }
 

@@ -397,6 +439,26 @@ static __init void rescue_initrd(void)
 #endif
 }
 
+/* Set up boot command line */
+static void __init setup_boot_command_line(void)
+{
+	char *parm = NULL;
+
+	/* copy arch command line */
+	strlcpy(boot_command_line, COMMAND_LINE, ARCH_COMMAND_LINE_SIZE);
+	boot_command_line[ARCH_COMMAND_LINE_SIZE - 1] = 0;
+
+	/* append IPL PARM data to the boot command line */
+	if (MACHINE_IS_VM) {
+		parm = boot_command_line + strlen(boot_command_line);
+		*parm++ = ' ';
+		get_ipl_vmparm(parm);
+		if (parm[0] == '=')
+			memmove(boot_command_line, parm + 1, strlen(parm));
+	}
+}
+
+
 /*
  * Save ipl parameters, clear bss memory, initialize storage keys
  * and create a kernel NSS at startup if the SAVESYS= parm is defined

@@ -411,10 +473,12 @@ void __init startup_init(void)
 	init_kernel_storage_key();
 	lockdep_init();
 	lockdep_off();
-	detect_machine_type();
-	create_kernel_nss();
 	sort_main_extable();
 	setup_lowcore_early();
+	detect_machine_type();
+	ipl_update_parameters();
+	setup_boot_command_line();
+	create_kernel_nss();
 	detect_mvpg();
 	detect_ieee();
 	detect_csp();

613 lines not on this page · raw message

Index: quilt-2.6/arch/s390/kernel/setup.c
===================================================================
@@ -221,18 +221,17 @@ static void __init conmode_default(void)
 #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE)
 static void __init setup_zfcpdump(unsigned int console_devno)
 {
-	static char str[64];
+	static char str[41];
 
 	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
 		return;
 	if (console_devno != -1)
-		sprintf(str, "cio_ignore=all,!0.0.%04x,!0.0.%04x",
+		sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x",
 			ipl_info.data.fcp.dev_id.devno, console_devno);
 	else
-		sprintf(str, "cio_ignore=all,!0.0.%04x",
+		sprintf(str, " cio_ignore=all,!0.0.%04x",
 			ipl_info.data.fcp.dev_id.devno);
-	strcat(COMMAND_LINE, " ");
-	strcat(COMMAND_LINE, str);
+	strcat(boot_command_line, str);
 	console_loglevel = 2;
 }
 #else

@@ -804,11 +803,9 @@ setup_arch(char **cmdline_p)
 		printk("We are running native (64 bit mode)\n");
 #endif /* CONFIG_64BIT */
 
-	/* Save unparsed command line copy for /proc/cmdline */
-	strlcpy(boot_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
-
-	*cmdline_p = COMMAND_LINE;
-	*(*cmdline_p + COMMAND_LINE_SIZE - 1) = '\0';
+	/* Have one command line that is parsed and saved in /proc/cmdline */
+	/* boot_command_line has been already set up in early.c */
+	*cmdline_p = boot_command_line;
 
         ROOT_DEV = Root_RAM0;
 

Index: quilt-2.6/include/asm-s390/ipl.h
===================================================================
@@ -56,15 +56,19 @@ struct ipl_block_fcp {
 	u8  scp_data[];
 } __attribute__((packed));
 
+#define DIAG308_VMPARM_SIZE	64
+
 struct ipl_block_ccw {
-	u8  load_param[8];
+	u8  load_parm[8];
 	u8  reserved1[84];
 	u8  reserved2[2];
 	u16 devno;
 	u8  vm_flags;
 	u8  reserved3[3];
 	u32 vm_parm_len;
-	u8  reserved4[80];
+	u8  nss_name[8];
+	u8  vm_parm[DIAG308_VMPARM_SIZE];
+	u8  reserved4[8];
 } __attribute__((packed));
 
 struct ipl_parameter_block {

@@ -73,7 +77,7 @@ struct ipl_parameter_block {
 		struct ipl_block_fcp fcp;
 		struct ipl_block_ccw ccw;
 	} ipl_info;
-} __attribute__((packed));
+} __attribute__((packed,aligned(4096)));
 
 /*
  * IPL validity flags

@@ -86,6 +90,8 @@ extern void do_reipl(void);
 extern void do_halt(void);
 extern void do_poff(void);
 extern void ipl_save_parameters(void);
+extern void ipl_update_parameters(void);
+extern void get_ipl_vmparm(char *);
 
 enum {
 	IPL_DEVNO_VALID		= 1,

@@ -147,6 +153,11 @@ enum diag308_flags {
 	DIAG308_FLAGS_LP_VALID	= 0x80,
 };
 
+enum diag308_vm_flags {
+	DIAG308_VM_FLAGS_NSS_VALID	= 0x80,
+	DIAG308_VM_FLAGS_VP_VALID	= 0x40,
+};
+
 enum diag308_rc {
 	DIAG308_RC_OK	= 1,
 };

Index: quilt-2.6/include/asm-s390/setup.h
===================================================================
@@ -8,7 +8,9 @@
 #ifndef _ASM_S390_SETUP_H
 #define _ASM_S390_SETUP_H
 
-#define COMMAND_LINE_SIZE 	896
+#define COMMAND_LINE_SIZE	1024
+
+#define ARCH_COMMAND_LINE_SIZE	896
 
 #ifdef __KERNEL__
 

Index: quilt-2.6/drivers/s390/crypto/ap_bus.h
===================================================================
@@ -92,6 +92,8 @@ struct ap_queue_status {
 #define AP_DEVICE_TYPE_PCIXCC	5
 #define AP_DEVICE_TYPE_CEX2A	6
 #define AP_DEVICE_TYPE_CEX2C	7
+#define AP_DEVICE_TYPE_CEX2A2	8
+#define AP_DEVICE_TYPE_CEX2C2	9
 
 /*
  * AP reset flag states

Index: quilt-2.6/drivers/s390/crypto/zcrypt_cex2a.c
===================================================================
@@ -49,6 +49,7 @@
 
 static struct ap_device_id zcrypt_cex2a_ids[] = {
 	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2A) },
+	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2A2) },
 	{ /* end of list */ },
 };
 

Index: quilt-2.6/drivers/s390/crypto/zcrypt_pcixcc.c
===================================================================
@@ -72,6 +72,7 @@ struct response_type {
 static struct ap_device_id zcrypt_pcixcc_ids[] = {
 	{ AP_DEVICE(AP_DEVICE_TYPE_PCIXCC) },
 	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C) },
+	{ AP_DEVICE(AP_DEVICE_TYPE_CEX2C2) },
 	{ /* end of list */ },
 };
 

Index: quilt-2.6/include/asm-s390/zcrypt.h
===================================================================
@@ -29,7 +29,7 @@
 
 #define ZCRYPT_VERSION 2
 #define ZCRYPT_RELEASE 1
-#define ZCRYPT_VARIANT 0
+#define ZCRYPT_VARIANT 1
 
 #include <linux/ioctl.h>
 #include <linux/compiler.h>