From f86635fad14c4a6810cf0e08488fc9129a3b3b32 Mon Sep 17 00:00:00 2001 From: Peter Oberparleiter Date: Fri, 27 Apr 2007 16:01:26 +0200 Subject: [PATCH] [S390] cio: Introduce struct chp_id. Introduce data type for channel-path IDs. Signed-off-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- drivers/s390/cio/chpid.h | 51 ++++++++++ drivers/s390/cio/chsc.c | 178 +++++++++++++++++++--------------- drivers/s390/cio/chsc.h | 8 +- drivers/s390/cio/cio.c | 5 +- drivers/s390/cio/device_fsm.c | 6 +- drivers/s390/cio/ioasm.h | 5 +- 6 files changed, 167 insertions(+), 86 deletions(-) create mode 100644 drivers/s390/cio/chpid.h diff --git a/drivers/s390/cio/chpid.h b/drivers/s390/cio/chpid.h new file mode 100644 index 000000000000..44cc00ed9b59 --- /dev/null +++ b/drivers/s390/cio/chpid.h @@ -0,0 +1,51 @@ +/* + * 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 */ diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 6f05a44e3817..bb6f876e53c2 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -20,43 +20,48 @@ #include "cio.h" #include "cio_debug.h" #include "ioasm.h" +#include "chpid.h" #include "chsc.h" static void *sei_page; -static int new_channel_path(int chpid); +static int new_channel_path(struct chp_id chpid); -static inline void -set_chp_logically_online(int chp, int onoff) +static inline struct channel_path *chpid_to_chp(struct chp_id chpid) { - css[0]->chps[chp]->state = onoff; + return css[chpid.cssid]->chps[chpid.id]; } -static int -get_chp_status(int chp) +static void set_chp_logically_online(struct chp_id chpid, int onoff) { - return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV); + chpid_to_chp(chpid)->state = onoff; } -void -chsc_validate_chpids(struct subchannel *sch) +static int get_chp_status(struct chp_id chpid) +{ + return (chpid_to_chp(chpid) ? chpid_to_chp(chpid)->state : -ENODEV); +} + +void chsc_validate_chpids(struct subchannel *sch) { int mask, chp; + struct chp_id chpid; + chp_id_init(&chpid); for (chp = 0; chp <= 7; chp++) { mask = 0x80 >> chp; - if (!get_chp_status(sch->schib.pmcw.chpid[chp])) + chpid.id = sch->schib.pmcw.chpid[chp]; + if (!get_chp_status(chpid)) /* disable using this path */ sch->opm &= ~mask; } } -void -chpid_is_actually_online(int chp) +void chpid_is_actually_online(struct chp_id chpid) { int state; - state = get_chp_status(chp); + state = get_chp_status(chpid); if (state < 0) { need_rescan = 1; queue_work(slow_path_wq, &slow_path_work); @@ -200,11 +205,14 @@ css_get_ssd_info(struct subchannel *sch) spin_unlock_irq(sch->lock); free_page((unsigned long)page); if (!ret) { - int j, chpid, mask; + int j, mask; + struct chp_id chpid; + + chp_id_init(&chpid); /* Allocate channel path structures, if needed. */ for (j = 0; j < 8; j++) { mask = 0x80 >> j; - chpid = sch->ssd_info.chpid[j]; + chpid.id = sch->ssd_info.chpid[j]; if ((sch->schib.pmcw.pim & mask) && (get_chp_status(chpid) < 0)) new_channel_path(chpid); @@ -227,7 +235,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data) for (j = 0; j < 8; j++) { mask = 0x80 >> j; if ((sch->schib.pmcw.pim & mask) && - (sch->schib.pmcw.chpid[j] == chpid->id)) + (sch->schib.pmcw.chpid[j] == chpid->chpid.id)) break; } if (j >= 8) @@ -277,18 +285,17 @@ out_unreg: return 0; } -static void -s390_set_chpid_offline( __u8 chpid) +static void s390_set_chpid_offline(struct chp_id chpid) { char dbf_txt[15]; struct device *dev; - sprintf(dbf_txt, "chpr%x", chpid); + sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_txt); if (get_chp_status(chpid) <= 0) return; - dev = get_device(&css[0]->chps[chpid]->dev); + dev = get_device(&(chpid_to_chp(chpid)->dev)); bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev), s390_subchannel_remove_chpid); @@ -316,7 +323,7 @@ s390_process_res_acc_sch(struct res_acc_data *res_data, struct subchannel *sch) * check if chpid is in information updated by ssd */ if (sch->ssd_info.valid && - sch->ssd_info.chpid[chp] == res_data->chp->id && + sch->ssd_info.chpid[chp] == res_data->chp->chpid.id && (sch->ssd_info.fla[chp] & res_data->fla_mask) == res_data->fla) { found = 1; @@ -409,7 +416,8 @@ s390_process_res_acc (struct res_acc_data *res_data) int rc; char dbf_txt[15]; - sprintf(dbf_txt, "accpr%x", res_data->chp->id); + sprintf(dbf_txt, "accpr%x.%02x", res_data->chp->chpid.cssid, + res_data->chp->chpid.id); CIO_TRACE_EVENT( 2, dbf_txt); if (res_data->fla != 0) { sprintf(dbf_txt, "fla%x", res_data->fla); @@ -482,17 +490,21 @@ struct chsc_sei_area { static int chsc_process_sei_link_incident(struct chsc_sei_area *sei_area) { - int chpid; + struct chp_id chpid; + int id; CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n", sei_area->rs, sei_area->rsid); if (sei_area->rs != 4) return 0; - chpid = __get_chpid_from_lir(sei_area->ccdf); - if (chpid < 0) + id = __get_chpid_from_lir(sei_area->ccdf); + if (id < 0) CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n"); - else + else { + chp_id_init(&chpid); + chpid.id = id; s390_set_chpid_offline(chpid); + } return 0; } @@ -501,6 +513,7 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) { struct res_acc_data res_data; struct device *dev; + struct chp_id chpid; int status; int rc; @@ -508,13 +521,15 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area) "rs_id=%04x)\n", sei_area->rs, sei_area->rsid); if (sei_area->rs != 4) return 0; + chp_id_init(&chpid); + chpid.id = sei_area->rsid; /* allocate a new channel path structure, if needed */ - status = get_chp_status(sei_area->rsid); + status = get_chp_status(chpid); if (status < 0) - new_channel_path(sei_area->rsid); + new_channel_path(chpid); else if (!status) return 0; - dev = get_device(&css[0]->chps[sei_area->rsid]->dev); + dev = get_device(&(chpid_to_chp(chpid)->dev)); memset(&res_data, 0, sizeof(struct res_acc_data)); res_data.chp = to_channelpath(dev); if ((sei_area->vf & 0xc0) != 0) { @@ -631,7 +646,7 @@ __chp_add(struct subchannel_id schid, void *data) for (i=0; i<8; i++) { mask = 0x80 >> i; if ((sch->schib.pmcw.pim & mask) && - (sch->schib.pmcw.chpid[i] == chp->id)) { + (sch->schib.pmcw.chpid[i] == chp->chpid.id)) { if (stsch(sch->schid, &sch->schib) != 0) { /* Endgame. */ spin_unlock_irq(sch->lock); @@ -657,8 +672,7 @@ __chp_add(struct subchannel_id schid, void *data) return 0; } -static int -chp_add(int chpid) +static int chp_add(struct chp_id chpid) { int rc; char dbf_txt[15]; @@ -667,10 +681,10 @@ chp_add(int chpid) if (!get_chp_status(chpid)) return 0; /* no need to do the rest */ - sprintf(dbf_txt, "cadd%x", chpid); + sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_txt); - dev = get_device(&css[0]->chps[chpid]->dev); + dev = get_device(&(chpid_to_chp(chpid)->dev)); rc = for_each_subchannel(__chp_add, to_channelpath(dev)); if (css_slow_subchannels_exist()) rc = -EAGAIN; @@ -683,9 +697,12 @@ chp_add(int chpid) /* * Handling of crw machine checks with channel path source. */ -int -chp_process_crw(int chpid, int on) +int chp_process_crw(int id, int on) { + struct chp_id chpid; + + chp_id_init(&chpid); + chpid.id = id; if (on == 0) { /* Path has gone. We use the link incident routine.*/ s390_set_chpid_offline(chpid); @@ -733,8 +750,8 @@ static void terminate_internal_io(struct subchannel *sch) sch->driver->termination(&sch->dev); } -static void -__s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on) +static void __s390_subchannel_vary_chpid(struct subchannel *sch, + struct chp_id chpid, int on) { int chp, old_lpm; unsigned long flags; @@ -745,7 +762,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on) spin_lock_irqsave(sch->lock, flags); old_lpm = sch->lpm; for (chp = 0; chp < 8; chp++) { - if (sch->ssd_info.chpid[chp] != chpid) + if (sch->ssd_info.chpid[chp] != chpid.id) continue; if (on) { @@ -780,11 +797,10 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on) spin_unlock_irqrestore(sch->lock, flags); } -static int -s390_subchannel_vary_chpid_off(struct device *dev, void *data) +static int s390_subchannel_vary_chpid_off(struct device *dev, void *data) { struct subchannel *sch; - __u8 *chpid; + struct chp_id *chpid; sch = to_subchannel(dev); chpid = data; @@ -793,11 +809,10 @@ s390_subchannel_vary_chpid_off(struct device *dev, void *data) return 0; } -static int -s390_subchannel_vary_chpid_on(struct device *dev, void *data) +static int s390_subchannel_vary_chpid_on(struct device *dev, void *data) { struct subchannel *sch; - __u8 *chpid; + struct chp_id *chpid; sch = to_subchannel(dev); chpid = data; @@ -833,23 +848,25 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data) * Function: s390_vary_chpid * Varies the specified chpid online or offline */ -static int -s390_vary_chpid( __u8 chpid, int on) +static int s390_vary_chpid(struct chp_id chpid, int on) { char dbf_text[15]; int status; - sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid); + sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid, + chpid.id); CIO_TRACE_EVENT( 2, dbf_text); status = get_chp_status(chpid); if (status < 0) { - printk(KERN_ERR "Can't vary unknown chpid %02X\n", chpid); + printk(KERN_ERR "Can't vary unknown chpid %x.%02x\n", + chpid.cssid, chpid.id); return -EINVAL; } if (!on && !status) { - printk(KERN_ERR "chpid %x is already offline\n", chpid); + printk(KERN_ERR "chpid %x.%02x is already offline\n", + chpid.cssid, chpid.id); return -EINVAL; } @@ -904,20 +921,19 @@ static struct bin_attribute chp_measurement_chars_attr = { .read = chp_measurement_chars_read, }; -static void -chp_measurement_copy_block(struct cmg_entry *buf, - struct channel_subsystem *css, int chpid) +static void chp_measurement_copy_block(struct cmg_entry *buf, + struct channel_subsystem *css, struct chp_id chpid) { void *area; struct cmg_entry *entry, reference_buf; int idx; - if (chpid < 128) { + if (chpid.id < 128) { area = css->cub_addr1; - idx = chpid; + idx = chpid.id; } else { area = css->cub_addr2; - idx = chpid - 128; + idx = chpid.id - 128; } entry = area + (idx * sizeof(struct cmg_entry)); do { @@ -941,7 +957,7 @@ chp_measurement_read(struct kobject *kobj, char *buf, loff_t off, size_t count) /* Only allow single reads. */ if (off || count < size) return 0; - chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id); + chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid); count = size; return count; } @@ -1137,7 +1153,7 @@ chp_status_show(struct device *dev, struct device_attribute *attr, char *buf) if (!chp) return 0; - return (get_chp_status(chp->id) ? sprintf(buf, "online\n") : + return (get_chp_status(chp->chpid) ? sprintf(buf, "online\n") : sprintf(buf, "offline\n")); } @@ -1154,9 +1170,9 @@ chp_status_write(struct device *dev, struct device_attribute *attr, const char * return count; if (!strnicmp(cmd, "on", 2)) - error = s390_vary_chpid(cp->id, 1); + error = s390_vary_chpid(cp->chpid, 1); else if (!strnicmp(cmd, "off", 3)) - error = s390_vary_chpid(cp->id, 0); + error = s390_vary_chpid(cp->chpid, 0); else error = -EINVAL; @@ -1227,9 +1243,8 @@ chp_release(struct device *dev) kfree(cp); } -static int -chsc_determine_channel_path_description(int chpid, - struct channel_path_desc *desc) +static int chsc_determine_channel_path_description(struct chp_id chpid, + struct channel_path_desc *desc) { int ccode, ret; @@ -1252,8 +1267,8 @@ chsc_determine_channel_path_description(int chpid, scpd_area->request.length = 0x0010; scpd_area->request.code = 0x0002; - scpd_area->first_chpid = chpid; - scpd_area->last_chpid = chpid; + scpd_area->first_chpid = chpid.id; + scpd_area->last_chpid = chpid.id; ccode = chsc(scpd_area); if (ccode > 0) { @@ -1349,8 +1364,8 @@ chsc_get_channel_measurement_chars(struct channel_path *chp) scmc_area->request.length = 0x0010; scmc_area->request.code = 0x0022; - scmc_area->first_chpid = chp->id; - scmc_area->last_chpid = chp->id; + scmc_area->first_chpid = chp->chpid.id; + scmc_area->last_chpid = chp->chpid.id; ccode = chsc(scmc_area); if (ccode > 0) { @@ -1396,8 +1411,7 @@ out: * Entries for chpids on the system bus. * This replaces /proc/chpids. */ -static int -new_channel_path(int chpid) +static int new_channel_path(struct chp_id chpid) { struct channel_path *chp; int ret; @@ -1407,11 +1421,12 @@ new_channel_path(int chpid) return -ENOMEM; /* fill in status, etc. */ - chp->id = chpid; + chp->chpid = chpid; chp->state = 1; - chp->dev.parent = &css[0]->device; + chp->dev.parent = &css[chpid.cssid]->device; chp->dev.release = chp_release; - snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid); + snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp%x.%02x", chpid.cssid, + chpid.id); /* Obtain channel path description and fill it in. */ ret = chsc_determine_channel_path_description(chpid, &chp->desc); @@ -1437,8 +1452,8 @@ new_channel_path(int chpid) /* make it known to the system */ ret = device_register(&chp->dev); if (ret) { - printk(KERN_WARNING "%s: could not register %02x\n", - __func__, chpid); + printk(KERN_WARNING "%s: could not register %x.%02x\n", + __func__, chpid.cssid, chpid.id); goto out_free; } ret = sysfs_create_group(&chp->dev.kobj, &chp_attr_group); @@ -1446,18 +1461,18 @@ new_channel_path(int chpid) device_unregister(&chp->dev); goto out_free; } - mutex_lock(&css[0]->mutex); - if (css[0]->cm_enabled) { + mutex_lock(&css[chpid.cssid]->mutex); + if (css[chpid.cssid]->cm_enabled) { ret = chsc_add_chp_cmg_attr(chp); if (ret) { sysfs_remove_group(&chp->dev.kobj, &chp_attr_group); device_unregister(&chp->dev); - mutex_unlock(&css[0]->mutex); + mutex_unlock(&css[chpid.cssid]->mutex); goto out_free; } } - css[0]->chps[chpid] = chp; - mutex_unlock(&css[0]->mutex); + css[chpid.cssid]->chps[chpid.id] = chp; + mutex_unlock(&css[chpid.cssid]->mutex); return ret; out_free: kfree(chp); @@ -1469,8 +1484,11 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no) { struct channel_path *chp; struct channel_path_desc *desc; + struct chp_id chpid; - chp = css[0]->chps[sch->schib.pmcw.chpid[chp_no]]; + chp_id_init(&chpid); + chpid.id = sch->schib.pmcw.chpid[chp_no]; + chp = chpid_to_chp(chpid); if (!chp) return NULL; desc = kmalloc(sizeof(struct channel_path_desc), GFP_KERNEL); diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h index 0fb2b024208f..2949c85b6d92 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -1,6 +1,10 @@ #ifndef S390_CHSC_H #define S390_CHSC_H +#include +#include +#include "chpid.h" + #define CHSC_SEI_ACC_CHPID 1 #define CHSC_SEI_ACC_LINKADDR 2 #define CHSC_SEI_ACC_FULLLINKADDR 3 @@ -34,7 +38,7 @@ struct channel_path_desc { } __attribute__ ((packed)); struct channel_path { - int id; + struct chp_id chpid; int state; struct channel_path_desc desc; /* Channel-measurement related stuff: */ @@ -46,7 +50,7 @@ struct channel_path { extern void s390_process_css( void ); extern void chsc_validate_chpids(struct subchannel *); -extern void chpid_is_actually_online(int); +extern void chpid_is_actually_online(struct chp_id); extern int css_get_ssd_info(struct subchannel *); extern int chsc_process_crw(void); extern int chp_process_crw(int, int); diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 21af446c1f2d..bab729202f49 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -954,6 +954,7 @@ static void css_reset(void) { int i, ret; unsigned long long timeout; + struct chp_id chpid; /* Reset subchannels. */ for_each_subchannel(__shutdown_subchannel_easy, NULL); @@ -963,8 +964,10 @@ static void css_reset(void) __ctl_set_bit(14, 28); /* Temporarily reenable machine checks. */ local_mcck_enable(); + chp_id_init(&chpid); for (i = 0; i <= __MAX_CHPID; i++) { - ret = rchp(i); + chpid.id = i; + ret = rchp(chpid); if ((ret == 0) || (ret == 2)) /* * rchp either succeeded, or another rchp is already diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index 089a3ddd6265..5f5ee1eef07a 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -22,6 +22,7 @@ #include "device.h" #include "chsc.h" #include "ioasm.h" +#include "chpid.h" int device_is_online(struct subchannel *sch) @@ -210,14 +211,17 @@ static void __recover_lost_chpids(struct subchannel *sch, int old_lpm) { int mask, i; + struct chp_id chpid; + chp_id_init(&chpid); for (i = 0; i<8; i++) { mask = 0x80 >> i; if (!(sch->lpm & mask)) continue; if (old_lpm & mask) continue; - chpid_is_actually_online(sch->schib.pmcw.chpid[i]); + chpid.id = sch->schib.pmcw.chpid[i]; + chpid_is_actually_online(chpid); } } diff --git a/drivers/s390/cio/ioasm.h b/drivers/s390/cio/ioasm.h index ad6d82940069..78c7db6daa84 100644 --- a/drivers/s390/cio/ioasm.h +++ b/drivers/s390/cio/ioasm.h @@ -2,6 +2,7 @@ #define S390_CIO_IOASM_H #include "schid.h" +#include "chpid.h" /* * TPI info structure @@ -189,9 +190,9 @@ static inline int chsc(void *chsc_area) return cc; } -static inline int rchp(int chpid) +static inline int rchp(struct chp_id chpid) { - register unsigned int reg1 asm ("1") = chpid; + register struct chp_id reg1 asm ("1") = chpid; int ccode; asm volatile( -- 2.20.1