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Subject[patch 5/8] cio: Channel-path configure function.
From: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>

Add a new attribute to the channel-path sysfs directory through which
channel-path configure operations can be triggered. Also listen for
hardware events requesting channel-path configure operations and
process them accordingly.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
---

drivers/s390/char/Makefile | 2
drivers/s390/char/sclp_chp.c | 196 +++++++++++++++++++++++++++++++++
drivers/s390/cio/chp.c | 249 +++++++++++++++++++++++++++++++++++++++++-
drivers/s390/cio/chp.h | 20 +++
drivers/s390/cio/chpid.h | 51 --------
drivers/s390/cio/chsc.c | 44 +++++++
drivers/s390/cio/chsc.h | 2
drivers/s390/cio/cio.c | 1
drivers/s390/cio/cio.h | 1
drivers/s390/cio/css.h | 4
drivers/s390/cio/device_fsm.c | 2
drivers/s390/cio/device_ops.c | 2
drivers/s390/cio/ioasm.h | 2
include/asm-s390/chpid.h | 53 ++++++++
include/asm-s390/cio.h | 1
include/asm-s390/sclp.h | 12 ++
16 files changed, 580 insertions(+), 62 deletions(-)

Index: linux-2.6/drivers/s390/char/Makefile
===================================================================
--- linux-2.6.orig/drivers/s390/char/Makefile
+++ linux-2.6/drivers/s390/char/Makefile
@@ -3,7 +3,7 @@
#

obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
- sclp_info.o sclp_confmgm.o
+ sclp_info.o sclp_confmgm.o sclp_chp.o

obj-$(CONFIG_TN3270) += raw3270.o
obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
Index: linux-2.6/drivers/s390/char/sclp_chp.c
===================================================================
--- /dev/null
+++ linux-2.6/drivers/s390/char/sclp_chp.c
@@ -0,0 +1,196 @@
+/*
+ * drivers/s390/char/sclp_chp.c
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/gfp.h>
+#include <linux/errno.h>
+#include <linux/completion.h>
+#include <asm/sclp.h>
+#include <asm/chpid.h>
+
+#include "sclp.h"
+
+#define TAG "sclp_chp: "
+
+#define SCLP_CMDW_CONFIGURE_CHANNEL_PATH 0x000f0001
+#define SCLP_CMDW_DECONFIGURE_CHANNEL_PATH 0x000e0001
+#define SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION 0x00030001
+
+static inline sclp_cmdw_t get_configure_cmdw(struct chp_id chpid)
+{
+ return SCLP_CMDW_CONFIGURE_CHANNEL_PATH | chpid.id << 8;
+}
+
+static inline sclp_cmdw_t get_deconfigure_cmdw(struct chp_id chpid)
+{
+ return SCLP_CMDW_DECONFIGURE_CHANNEL_PATH | chpid.id << 8;
+}
+
+static void chp_callback(struct sclp_req *req, void *data)
+{
+ struct completion *completion = data;
+
+ complete(completion);
+}
+
+struct chp_cfg_sccb {
+ struct sccb_header header;
+ u8 ccm;
+ u8 reserved[6];
+ u8 cssid;
+} __attribute__((packed));
+
+struct chp_cfg_data {
+ struct chp_cfg_sccb sccb;
+ struct sclp_req req;
+ struct completion completion;
+} __attribute__((packed));
+
+static int do_configure(sclp_cmdw_t cmd)
+{
+ struct chp_cfg_data *data;
+ int rc;
+
+ /* Prepare sccb. */
+ data = (struct chp_cfg_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!data)
+ return -ENOMEM;
+ data->sccb.header.length = sizeof(struct chp_cfg_sccb);
+ data->req.command = cmd;
+ data->req.sccb = &(data->sccb);
+ data->req.status = SCLP_REQ_FILLED;
+ data->req.callback = chp_callback;
+ data->req.callback_data = &(data->completion);
+ init_completion(&data->completion);
+
+ /* Perform sclp request. */
+ rc = sclp_add_request(&(data->req));
+ if (rc)
+ goto out;
+ wait_for_completion(&data->completion);
+
+ /* Check response .*/
+ if (data->req.status != SCLP_REQ_DONE) {
+ printk(KERN_WARNING TAG "configure channel-path request failed "
+ "(status=0x%02x)\n", data->req.status);
+ rc = -EIO;
+ goto out;
+ }
+ switch (data->sccb.header.response_code) {
+ case 0x0020:
+ case 0x0120:
+ case 0x0440:
+ case 0x0450:
+ break;
+ default:
+ printk(KERN_WARNING TAG "configure channel-path failed "
+ "(cmd=0x%08x, response=0x%04x)\n", cmd,
+ data->sccb.header.response_code);
+ rc = -EIO;
+ break;
+ }
+out:
+ free_page((unsigned long) data);
+
+ return rc;
+}
+
+/**
+ * sclp_chp_configure - perform configure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform configure channel-path command sclp command for specified chpid.
+ * Return 0 after command successfully finished, non-zero otherwise.
+ */
+int sclp_chp_configure(struct chp_id chpid)
+{
+ return do_configure(get_configure_cmdw(chpid));
+}
+
+/**
+ * sclp_chp_deconfigure - perform deconfigure channel-path sclp command
+ * @chpid: channel-path ID
+ *
+ * Perform deconfigure channel-path command sclp command for specified chpid
+ * and wait for completion. On success return 0. Return non-zero otherwise.
+ */
+int sclp_chp_deconfigure(struct chp_id chpid)
+{
+ return do_configure(get_deconfigure_cmdw(chpid));
+}
+
+struct chp_info_sccb {
+ struct sccb_header header;
+ u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
+ u8 standby[SCLP_CHP_INFO_MASK_SIZE];
+ u8 configured[SCLP_CHP_INFO_MASK_SIZE];
+ u8 ccm;
+ u8 reserved[6];
+ u8 cssid;
+} __attribute__((packed));
+
+struct chp_info_data {
+ struct chp_info_sccb sccb;
+ struct sclp_req req;
+ struct completion completion;
+} __attribute__((packed));
+
+/**
+ * sclp_chp_read_info - perform read channel-path information sclp command
+ * @info: resulting channel-path information data
+ *
+ * Perform read channel-path information sclp command and wait for completion.
+ * On success, store channel-path information in @info and return 0. Return
+ * non-zero otherwise.
+ */
+int sclp_chp_read_info(struct sclp_chp_info *info)
+{
+ struct chp_info_data *data;
+ int rc;
+
+ /* Prepare sccb. */
+ data = (struct chp_info_data *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!data)
+ return -ENOMEM;
+ data->sccb.header.length = sizeof(struct chp_info_sccb);
+ data->req.command = SCLP_CMDW_READ_CHANNEL_PATH_INFORMATION;
+ data->req.sccb = &(data->sccb);
+ data->req.status = SCLP_REQ_FILLED;
+ data->req.callback = chp_callback;
+ data->req.callback_data = &(data->completion);
+ init_completion(&data->completion);
+
+ /* Perform sclp request. */
+ rc = sclp_add_request(&(data->req));
+ if (rc)
+ goto out;
+ wait_for_completion(&data->completion);
+
+ /* Check response .*/
+ if (data->req.status != SCLP_REQ_DONE) {
+ printk(KERN_WARNING TAG "read channel-path info request failed "
+ "(status=0x%02x)\n", data->req.status);
+ rc = -EIO;
+ goto out;
+ }
+ if (data->sccb.header.response_code != 0x0010) {
+ printk(KERN_WARNING TAG "read channel-path info failed "
+ "(response=0x%04x)\n", data->sccb.header.response_code);
+ rc = -EIO;
+ goto out;
+ }
+ memcpy(info->recognized, data->sccb.recognized,
+ SCLP_CHP_INFO_MASK_SIZE);
+ memcpy(info->standby, data->sccb.standby,
+ SCLP_CHP_INFO_MASK_SIZE);
+ memcpy(info->configured, data->sccb.configured,
+ SCLP_CHP_INFO_MASK_SIZE);
+out:
+ free_page((unsigned long) data);
+
+ return rc;
+}
Index: linux-2.6/drivers/s390/cio/chp.c
===================================================================
--- linux-2.6.orig/drivers/s390/cio/chp.c
+++ linux-2.6/drivers/s390/cio/chp.c
@@ -10,9 +10,14 @@
#include <linux/bug.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
#include <asm/errno.h>
+#include <asm/chpid.h>
+#include <asm/sclp.h>

-#include "chpid.h"
#include "cio.h"
#include "css.h"
#include "ioasm.h"
@@ -20,6 +25,32 @@
#include "chp.h"

#define to_channelpath(device) container_of(device, struct channel_path, dev)
+#define CHP_INFO_UPDATE_INTERVAL 1*HZ
+
+enum cfg_task_t {
+ cfg_none,
+ cfg_configure,
+ cfg_deconfigure
+};
+
+/* Map for pending configure tasks. */
+static enum cfg_task_t chp_cfg_task[__MAX_CSSID + 1][__MAX_CHPID + 1];
+static DEFINE_MUTEX(cfg_lock);
+static int cfg_busy;
+
+/* Map for channel-path status. */
+static struct sclp_chp_info chp_info;
+static DEFINE_MUTEX(info_lock);
+
+/* Time after which channel-path status may be outdated. */
+static unsigned long chp_info_expires;
+
+/* Workqueue to perform pending configure tasks. */
+static struct workqueue_struct *chp_wq;
+static struct work_struct cfg_work;
+
+/* Wait queue for configure completion events. */
+static wait_queue_head_t cfg_wait_queue;

/* Return channel_path struct for given chpid. */
static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
@@ -251,6 +282,43 @@ static ssize_t chp_status_write(struct d

static DEVICE_ATTR(status, 0644, chp_status_show, chp_status_write);

+static ssize_t chp_configure_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct channel_path *cp;
+ int status;
+
+ cp = container_of(dev, struct channel_path, dev);
+ status = chp_info_get_status(cp->chpid);
+ if (status < 0)
+ return status;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", status);
+}
+
+static int cfg_wait_idle(void);
+
+static ssize_t chp_configure_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct channel_path *cp;
+ int val;
+ char delim;
+
+ if (sscanf(buf, "%d %c", &val, &delim) != 1)
+ return -EINVAL;
+ if (val != 0 && val != 1)
+ return -EINVAL;
+ cp = container_of(dev, struct channel_path, dev);
+ chp_cfg_schedule(cp->chpid, val);
+ cfg_wait_idle();
+
+ return count;
+}
+
+static DEVICE_ATTR(configure, 0644, chp_configure_show, chp_configure_write);
+
static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -293,6 +361,7 @@ static DEVICE_ATTR(shared, 0444, chp_sha

static struct attribute * chp_attrs[] = {
&dev_attr_status.attr,
+ &dev_attr_configure.attr,
&dev_attr_type.attr,
&dev_attr_cmg.attr,
&dev_attr_shared.attr,
@@ -323,6 +392,8 @@ int chp_new(struct chp_id chpid)
struct channel_path *chp;
int ret;

+ if (chp_is_registered(chpid))
+ return 0;
chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
if (!chp)
return -ENOMEM;
@@ -431,3 +502,179 @@ int chp_process_crw(int id, int status)
return 0;
}
}
+
+static inline int info_bit_num(struct chp_id id)
+{
+ return id.id + id.cssid * (__MAX_CHPID + 1);
+}
+
+/* Force chp_info refresh on next call to info_validate(). */
+static void info_expire(void)
+{
+ mutex_lock(&info_lock);
+ chp_info_expires = jiffies - 1;
+ mutex_unlock(&info_lock);
+}
+
+/* Ensure that chp_info is up-to-date. */
+static int info_update(void)
+{
+ int rc;
+
+ mutex_lock(&info_lock);
+ rc = 0;
+ if (time_after(jiffies, chp_info_expires)) {
+ /* Data is too old, update. */
+ rc = sclp_chp_read_info(&chp_info);
+ chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL ;
+ }
+ mutex_unlock(&info_lock);
+
+ return rc;
+}
+
+/**
+ * chp_info_get_status - retrieve configure status of a channel-path
+ * @chpid: channel-path ID
+ *
+ * On success, return 0 for standby, 1 for configured, 2 for reserved,
+ * 3 for not recognized. Return negative error code on error.
+ */
+int chp_info_get_status(struct chp_id chpid)
+{
+ int rc;
+ int bit;
+
+ rc = info_update();
+ if (rc)
+ return rc;
+
+ bit = info_bit_num(chpid);
+ mutex_lock(&info_lock);
+ if (!chp_test_bit(chp_info.recognized, bit))
+ rc = CHP_STATUS_NOT_RECOGNIZED;
+ else if (chp_test_bit(chp_info.configured, bit))
+ rc = CHP_STATUS_CONFIGURED;
+ else if (chp_test_bit(chp_info.standby, bit))
+ rc = CHP_STATUS_STANDBY;
+ else
+ rc = CHP_STATUS_RESERVED;
+ mutex_unlock(&info_lock);
+
+ return rc;
+}
+
+/* Return configure task for chpid. */
+static enum cfg_task_t cfg_get_task(struct chp_id chpid)
+{
+ return chp_cfg_task[chpid.cssid][chpid.id];
+}
+
+/* Set configure task for chpid. */
+static void cfg_set_task(struct chp_id chpid, enum cfg_task_t cfg)
+{
+ chp_cfg_task[chpid.cssid][chpid.id] = cfg;
+}
+
+/* Perform one configure/deconfigure request. Reschedule work function until
+ * last request. */
+static void cfg_func(struct work_struct *work)
+{
+ struct chp_id chpid;
+ enum cfg_task_t t;
+
+ mutex_lock(&cfg_lock);
+ chp_id_for_each(&chpid) {
+ t = cfg_get_task(chpid);
+ if (t != cfg_none) {
+ cfg_set_task(chpid, cfg_none);
+ break;
+ }
+ }
+ mutex_unlock(&cfg_lock);
+
+ switch (t) {
+ case cfg_configure:
+ sclp_chp_configure(chpid);
+ info_expire();
+ chsc_chp_online(chpid);
+ break;
+ case cfg_deconfigure:
+ sclp_chp_deconfigure(chpid);
+ info_expire();
+ chsc_chp_offline(chpid);
+ break;
+ case cfg_none:
+ /* Get updated information after last change. */
+ info_update();
+ mutex_lock(&cfg_lock);
+ cfg_busy = 0;
+ mutex_unlock(&cfg_lock);
+ wake_up_interruptible(&cfg_wait_queue);
+ return;
+ }
+ queue_work(chp_wq, &cfg_work);
+}
+
+/**
+ * chp_cfg_schedule - schedule chpid configuration request
+ * @chpid - channel-path ID
+ * @configure - Non-zero for configure, zero for deconfigure
+ *
+ * Schedule a channel-path configuration/deconfiguration request.
+ */
+void chp_cfg_schedule(struct chp_id chpid, int configure)
+{
+ CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
+ configure);
+ mutex_lock(&cfg_lock);
+ cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
+ cfg_busy = 1;
+ mutex_unlock(&cfg_lock);
+ queue_work(chp_wq, &cfg_work);
+}
+
+/**
+ * chp_cfg_cancel_deconfigure - cancel chpid deconfiguration request
+ * @chpid - channel-path ID
+ *
+ * Cancel an active channel-path deconfiguration request if it has not yet
+ * been performed.
+ */
+void chp_cfg_cancel_deconfigure(struct chp_id chpid)
+{
+ CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
+ mutex_lock(&cfg_lock);
+ if (cfg_get_task(chpid) == cfg_deconfigure)
+ cfg_set_task(chpid, cfg_none);
+ mutex_unlock(&cfg_lock);
+}
+
+static int cfg_wait_idle(void)
+{
+ if (wait_event_interruptible(cfg_wait_queue, !cfg_busy))
+ return -ERESTARTSYS;
+ return 0;
+}
+
+static int __init chp_init(void)
+{
+ struct chp_id chpid;
+
+ chp_wq = create_singlethread_workqueue("cio_chp");
+ if (!chp_wq)
+ return -ENOMEM;
+ INIT_WORK(&cfg_work, cfg_func);
+ init_waitqueue_head(&cfg_wait_queue);
+ if (info_update())
+ return 0;
+ /* Register available channel-paths. */
+ chp_id_for_each(&chpid) {
+ if (chp_info_get_status(chpid) != CHP_STATUS_NOT_RECOGNIZED)
+ chp_new(chpid);
+ }
+
+ return 0;
+}
+
+subsys_initcall(chp_init);
Index: linux-2.6/drivers/s390/cio/chp.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/chp.h
+++ linux-2.6/drivers/s390/cio/chp.h
@@ -10,10 +10,23 @@

#include <linux/types.h>
#include <linux/device.h>
-
-#include "chpid.h"
+#include <asm/chpid.h>
#include "chsc.h"

+#define CHP_STATUS_STANDBY 0
+#define CHP_STATUS_CONFIGURED 1
+#define CHP_STATUS_RESERVED 2
+#define CHP_STATUS_NOT_RECOGNIZED 3
+
+static inline int chp_test_bit(u8 *bitmap, int num)
+{
+ int byte = num >> 3;
+ int mask = 128 >> (num & 7);
+
+ return (bitmap[byte] & mask) ? 1 : 0;
+}
+
+
struct channel_path {
struct chp_id chpid;
int state;
@@ -33,5 +46,8 @@ int chp_process_crw(int id, int availabl
void chp_remove_cmg_attr(struct channel_path *chp);
int chp_add_cmg_attr(struct channel_path *chp);
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);

#endif /* S390_CHP_H */
Index: linux-2.6/drivers/s390/cio/chpid.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/chpid.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * drivers/s390/cio/chpid.h
- *
- * Copyright IBM Corp. 2007
- * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
- */
-
-#ifndef S390_CHP_ID_H
-#define S390_CHP_ID_H S390_CHP_ID_H
-
-#include <linux/string.h>
-#include <asm/types.h>
-#include "css.h"
-
-struct chp_id {
- u8 reserved1;
- u8 cssid;
- u8 reserved2;
- u8 id;
-} __attribute__((packed));
-
-static inline void chp_id_init(struct chp_id *chpid)
-{
- memset(chpid, 0, sizeof(struct chp_id));
-}
-
-static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
-{
- return (a->id == b->id) && (a->cssid == b->cssid);
-}
-
-static inline void chp_id_next(struct chp_id *chpid)
-{
- if (chpid->id < __MAX_CHPID)
- chpid->id++;
- else {
- chpid->id = 0;
- chpid->cssid++;
- }
-}
-
-static inline int chp_id_is_valid(struct chp_id *chpid)
-{
- return (chpid->cssid <= __MAX_CSSID);
-}
-
-
-#define chp_id_for_each(c) \
- for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
-
-#endif /* S390_CHP_ID_H */
Index: linux-2.6/drivers/s390/cio/chsc.c
===================================================================
--- linux-2.6.orig/drivers/s390/cio/chsc.c
+++ linux-2.6/drivers/s390/cio/chsc.c
@@ -15,12 +15,12 @@
#include <linux/device.h>

#include <asm/cio.h>
+#include <asm/chpid.h>

#include "css.h"
#include "cio.h"
#include "cio_debug.h"
#include "ioasm.h"
-#include "chpid.h"
#include "chp.h"
#include "chsc.h"

@@ -498,6 +498,45 @@ static int chsc_process_sei_res_acc(stru
return rc;
}

+struct chp_config_data {
+ u8 map[32];
+ u8 op;
+ u8 pc;
+};
+
+static int chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
+{
+ struct chp_config_data *data;
+ struct chp_id chpid;
+ int num;
+
+ CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
+ if (sei_area->rs != 0)
+ return 0;
+ data = (struct chp_config_data *) &(sei_area->ccdf);
+ chp_id_init(&chpid);
+ for (num = 0; num <= __MAX_CHPID; num++) {
+ if (!chp_test_bit(data->map, num))
+ continue;
+ chpid.id = num;
+ printk(KERN_WARNING "cio: processing configure event %d for "
+ "chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
+ switch (data->op) {
+ case 0:
+ chp_cfg_schedule(chpid, 1);
+ break;
+ case 1:
+ chp_cfg_schedule(chpid, 0);
+ break;
+ case 2:
+ chp_cfg_cancel_deconfigure(chpid);
+ break;
+ }
+ }
+
+ return 0;
+}
+
static int chsc_process_sei(struct chsc_sei_area *sei_area)
{
int rc;
@@ -514,6 +553,9 @@ static int chsc_process_sei(struct chsc_
case 2: /* i/o resource accessibiliy */
rc = chsc_process_sei_res_acc(sei_area);
break;
+ case 8: /* channel-path-configuration notification */
+ rc = chsc_process_sei_chp_config(sei_area);
+ break;
default: /* other stuff */
CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
sei_area->cc);
Index: linux-2.6/drivers/s390/cio/chsc.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/chsc.h
+++ linux-2.6/drivers/s390/cio/chsc.h
@@ -3,7 +3,7 @@

#include <linux/types.h>
#include <linux/device.h>
-#include "chpid.h"
+#include <asm/chpid.h>

#define CHSC_SDA_OC_MSS 0x2

Index: linux-2.6/drivers/s390/cio/cio.c
===================================================================
--- linux-2.6.orig/drivers/s390/cio/cio.c
+++ linux-2.6/drivers/s390/cio/cio.c
@@ -22,6 +22,7 @@
#include <asm/setup.h>
#include <asm/reset.h>
#include <asm/ipl.h>
+#include <asm/chpid.h>
#include "airq.h"
#include "cio.h"
#include "css.h"
Index: linux-2.6/drivers/s390/cio/cio.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/cio.h
+++ linux-2.6/drivers/s390/cio/cio.h
@@ -3,6 +3,7 @@

#include "schid.h"
#include <linux/mutex.h>
+#include <linux/device.h>

/*
* where we put the ssd info
Index: linux-2.6/drivers/s390/cio/css.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/css.h
+++ linux-2.6/drivers/s390/cio/css.h
@@ -5,8 +5,10 @@
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/device.h>
+#include <linux/types.h>

#include <asm/cio.h>
+#include <asm/chpid.h>

#include "schid.h"

@@ -149,8 +151,6 @@ extern void css_reiterate_subchannels(vo

#define __MAX_SUBCHANNEL 65535
#define __MAX_SSID 3
-#define __MAX_CHPID 255
-#define __MAX_CSSID 0

struct channel_subsystem {
u8 cssid;
Index: linux-2.6/drivers/s390/cio/device_fsm.c
===================================================================
--- linux-2.6.orig/drivers/s390/cio/device_fsm.c
+++ linux-2.6/drivers/s390/cio/device_fsm.c
@@ -15,6 +15,7 @@

#include <asm/ccwdev.h>
#include <asm/cio.h>
+#include <asm/chpid.h>

#include "cio.h"
#include "cio_debug.h"
@@ -22,7 +23,6 @@
#include "device.h"
#include "chsc.h"
#include "ioasm.h"
-#include "chpid.h"
#include "chp.h"

int
Index: linux-2.6/drivers/s390/cio/device_ops.c
===================================================================
--- linux-2.6.orig/drivers/s390/cio/device_ops.c
+++ linux-2.6/drivers/s390/cio/device_ops.c
@@ -16,13 +16,13 @@

#include <asm/ccwdev.h>
#include <asm/idals.h>
+#include <asm/chpid.h>

#include "cio.h"
#include "cio_debug.h"
#include "css.h"
#include "chsc.h"
#include "device.h"
-#include "chpid.h"
#include "chp.h"

int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags)
Index: linux-2.6/drivers/s390/cio/ioasm.h
===================================================================
--- linux-2.6.orig/drivers/s390/cio/ioasm.h
+++ linux-2.6/drivers/s390/cio/ioasm.h
@@ -1,8 +1,8 @@
#ifndef S390_CIO_IOASM_H
#define S390_CIO_IOASM_H

+#include <asm/chpid.h>
#include "schid.h"
-#include "chpid.h"

/*
* TPI info structure
Index: linux-2.6/include/asm-s390/chpid.h
===================================================================
--- /dev/null
+++ linux-2.6/include/asm-s390/chpid.h
@@ -0,0 +1,53 @@
+/*
+ * drivers/s390/cio/chpid.h
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_CHPID_H
+#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
+
+#include <linux/string.h>
+#include <asm/types.h>
+#include <asm/cio.h>
+
+#define __MAX_CHPID 255
+
+struct chp_id {
+ u8 reserved1;
+ u8 cssid;
+ u8 reserved2;
+ u8 id;
+} __attribute__((packed));
+
+static inline void chp_id_init(struct chp_id *chpid)
+{
+ memset(chpid, 0, sizeof(struct chp_id));
+}
+
+static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
+{
+ return (a->id == b->id) && (a->cssid == b->cssid);
+}
+
+static inline void chp_id_next(struct chp_id *chpid)
+{
+ if (chpid->id < __MAX_CHPID)
+ chpid->id++;
+ else {
+ chpid->id = 0;
+ chpid->cssid++;
+ }
+}
+
+static inline int chp_id_is_valid(struct chp_id *chpid)
+{
+ return (chpid->cssid <= __MAX_CSSID);
+}
+
+
+#define chp_id_for_each(c) \
+ for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
+
+#endif /* _ASM_S390_CHPID_H */
Index: linux-2.6/include/asm-s390/cio.h
===================================================================
--- linux-2.6.orig/include/asm-s390/cio.h
+++ linux-2.6/include/asm-s390/cio.h
@@ -13,6 +13,7 @@
#ifdef __KERNEL__

#define LPM_ANYPATH 0xff
+#define __MAX_CSSID 0

/*
* subchannel status word
Index: linux-2.6/include/asm-s390/sclp.h
===================================================================
--- linux-2.6.orig/include/asm-s390/sclp.h
+++ linux-2.6/include/asm-s390/sclp.h
@@ -9,6 +9,7 @@
#define _ASM_S390_SCLP_H

#include <linux/types.h>
+#include <asm/chpid.h>

struct sccb_header {
u16 length;
@@ -33,7 +34,18 @@ struct sclp_readinfo_sccb {
u8 _reserved3[4096 - 112]; /* 112-4095 */
} __attribute__((packed, aligned(4096)));

+#define SCLP_CHP_INFO_MASK_SIZE 32
+
+struct sclp_chp_info {
+ u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
+ u8 standby[SCLP_CHP_INFO_MASK_SIZE];
+ u8 configured[SCLP_CHP_INFO_MASK_SIZE];
+};
+
extern struct sclp_readinfo_sccb s390_readinfo_sccb;
extern void sclp_readinfo_early(void);
+extern int sclp_chp_configure(struct chp_id chpid);
+extern int sclp_chp_deconfigure(struct chp_id chpid);
+extern int sclp_chp_read_info(struct sclp_chp_info *info);

#endif /* _ASM_S390_SCLP_H */
--
-
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