From: Peter Oberparleiter 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 Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- drivers/s390/char/Makefile | 2 drivers/s390/char/sclp_chp.c | 196 ++++++++++++++++++++++++++++++++ drivers/s390/cio/chp.c | 250 +++++++++++++++++++++++++++++++++++++++++- 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, 581 insertions(+), 62 deletions(-) Index: quilt-2.6/drivers/s390/char/Makefile =================================================================== --- quilt-2.6.orig/drivers/s390/char/Makefile 2007-04-27 16:01:49.000000000 +0200 +++ quilt-2.6/drivers/s390/char/Makefile 2007-04-27 16:04:54.000000000 +0200 @@ -3,7 +3,7 @@ # obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \ - sclp_info.o + sclp_info.o sclp_chp.o obj-$(CONFIG_TN3270) += raw3270.o obj-$(CONFIG_TN3270_CONSOLE) += con3270.o Index: quilt-2.6/drivers/s390/char/sclp_chp.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ quilt-2.6/drivers/s390/char/sclp_chp.c 2007-04-27 16:04:54.000000000 +0200 @@ -0,0 +1,196 @@ +/* + * drivers/s390/char/sclp_chp.c + * + * Copyright IBM Corp. 2007 + * Author(s): Peter Oberparleiter + */ + +#include +#include +#include +#include +#include +#include + +#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: quilt-2.6/drivers/s390/cio/chp.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/chp.c 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/chp.c 2007-04-27 16:04:54.000000000 +0200 @@ -10,9 +10,14 @@ #include #include #include +#include +#include +#include +#include #include +#include +#include -#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 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 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 @@ 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; @@ -435,3 +506,180 @@ 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); + t = cfg_none; + 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: quilt-2.6/drivers/s390/cio/chp.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/chp.h 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/chp.h 2007-04-27 16:04:54.000000000 +0200 @@ -10,10 +10,23 @@ #include #include - -#include "chpid.h" +#include #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 @@ 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: quilt-2.6/drivers/s390/cio/chpid.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/chpid.h 2007-04-27 16:04:52.000000000 +0200 +++ /dev/null 1970-01-01 00:00:00.000000000 +0000 @@ -1,51 +0,0 @@ -/* - * drivers/s390/cio/chpid.h - * - * Copyright IBM Corp. 2007 - * Author(s): Peter Oberparleiter - */ - -#ifndef S390_CHP_ID_H -#define S390_CHP_ID_H S390_CHP_ID_H - -#include -#include -#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: quilt-2.6/drivers/s390/cio/chsc.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/chsc.c 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/chsc.c 2007-04-27 16:04:54.000000000 +0200 @@ -15,12 +15,12 @@ #include #include +#include #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 @@ 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 @@ 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: quilt-2.6/drivers/s390/cio/chsc.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/chsc.h 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/chsc.h 2007-04-27 16:04:54.000000000 +0200 @@ -3,7 +3,7 @@ #include #include -#include "chpid.h" +#include #define CHSC_SDA_OC_MSS 0x2 Index: quilt-2.6/drivers/s390/cio/cio.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/cio.c 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/cio.c 2007-04-27 16:04:54.000000000 +0200 @@ -22,6 +22,7 @@ #include #include #include +#include #include "airq.h" #include "cio.h" #include "css.h" Index: quilt-2.6/drivers/s390/cio/cio.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/cio.h 2007-04-27 16:01:49.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/cio.h 2007-04-27 16:04:54.000000000 +0200 @@ -3,6 +3,7 @@ #include "schid.h" #include +#include /* * where we put the ssd info Index: quilt-2.6/drivers/s390/cio/css.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/css.h 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/css.h 2007-04-27 16:04:54.000000000 +0200 @@ -5,8 +5,10 @@ #include #include #include +#include #include +#include #include "schid.h" @@ -149,8 +151,6 @@ #define __MAX_SUBCHANNEL 65535 #define __MAX_SSID 3 -#define __MAX_CHPID 255 -#define __MAX_CSSID 0 struct channel_subsystem { u8 cssid; Index: quilt-2.6/drivers/s390/cio/device_fsm.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device_fsm.c 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/device_fsm.c 2007-04-27 16:04:54.000000000 +0200 @@ -15,6 +15,7 @@ #include #include +#include #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: quilt-2.6/drivers/s390/cio/device_ops.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device_ops.c 2007-04-27 16:04:53.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/device_ops.c 2007-04-27 16:04:54.000000000 +0200 @@ -16,13 +16,13 @@ #include #include +#include #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: quilt-2.6/drivers/s390/cio/ioasm.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/ioasm.h 2007-04-27 16:04:52.000000000 +0200 +++ quilt-2.6/drivers/s390/cio/ioasm.h 2007-04-27 16:04:54.000000000 +0200 @@ -1,8 +1,8 @@ #ifndef S390_CIO_IOASM_H #define S390_CIO_IOASM_H +#include #include "schid.h" -#include "chpid.h" /* * TPI info structure Index: quilt-2.6/include/asm-s390/chpid.h =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ quilt-2.6/include/asm-s390/chpid.h 2007-04-27 16:04:54.000000000 +0200 @@ -0,0 +1,53 @@ +/* + * drivers/s390/cio/chpid.h + * + * Copyright IBM Corp. 2007 + * Author(s): Peter Oberparleiter + */ + +#ifndef _ASM_S390_CHPID_H +#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H + +#include +#include +#include + +#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: quilt-2.6/include/asm-s390/cio.h =================================================================== --- quilt-2.6.orig/include/asm-s390/cio.h 2007-04-27 16:04:52.000000000 +0200 +++ quilt-2.6/include/asm-s390/cio.h 2007-04-27 16:04:54.000000000 +0200 @@ -13,6 +13,7 @@ #ifdef __KERNEL__ #define LPM_ANYPATH 0xff +#define __MAX_CSSID 0 /* * subchannel status word Index: quilt-2.6/include/asm-s390/sclp.h =================================================================== --- quilt-2.6.orig/include/asm-s390/sclp.h 2007-04-27 16:01:49.000000000 +0200 +++ quilt-2.6/include/asm-s390/sclp.h 2007-04-27 16:04:54.000000000 +0200 @@ -9,6 +9,7 @@ #define _ASM_S390_SCLP_H #include +#include struct sccb_header { u16 length; @@ -33,7 +34,18 @@ 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 */ -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/