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[S390] cio: Introduce struct chp_id.
Introduce data type for channel-path IDs. 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>
This commit is contained in:
Peter Oberparleiter
Martin Schwidefsky
parent
6fc321fd7d
commit
f86635fad1
6 changed files with 167 additions and 86 deletions
51
drivers/s390/cio/chpid.h
Normal file
51
drivers/s390/cio/chpid.h
Normal file
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@ -0,0 +1,51 @@
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/*
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* drivers/s390/cio/chpid.h
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*
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* Copyright IBM Corp. 2007
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* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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*/
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#ifndef S390_CHP_ID_H
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#define S390_CHP_ID_H S390_CHP_ID_H
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#include <linux/string.h>
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#include <asm/types.h>
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#include "css.h"
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struct chp_id {
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u8 reserved1;
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u8 cssid;
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u8 reserved2;
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u8 id;
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} __attribute__((packed));
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static inline void chp_id_init(struct chp_id *chpid)
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{
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memset(chpid, 0, sizeof(struct chp_id));
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}
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static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
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{
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return (a->id == b->id) && (a->cssid == b->cssid);
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}
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static inline void chp_id_next(struct chp_id *chpid)
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{
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if (chpid->id < __MAX_CHPID)
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chpid->id++;
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else {
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chpid->id = 0;
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chpid->cssid++;
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}
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}
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static inline int chp_id_is_valid(struct chp_id *chpid)
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{
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return (chpid->cssid <= __MAX_CSSID);
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}
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#define chp_id_for_each(c) \
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for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
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#endif /* S390_CHP_ID_H */
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@ -20,43 +20,48 @@
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#include "cio.h"
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#include "cio_debug.h"
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#include "ioasm.h"
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#include "chpid.h"
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#include "chsc.h"
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static void *sei_page;
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static int new_channel_path(int chpid);
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static int new_channel_path(struct chp_id chpid);
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static inline void
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set_chp_logically_online(int chp, int onoff)
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static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
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{
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css[0]->chps[chp]->state = onoff;
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return css[chpid.cssid]->chps[chpid.id];
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}
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static int
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get_chp_status(int chp)
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static void set_chp_logically_online(struct chp_id chpid, int onoff)
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{
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return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV);
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chpid_to_chp(chpid)->state = onoff;
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}
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void
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chsc_validate_chpids(struct subchannel *sch)
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static int get_chp_status(struct chp_id chpid)
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{
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return (chpid_to_chp(chpid) ? chpid_to_chp(chpid)->state : -ENODEV);
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}
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void chsc_validate_chpids(struct subchannel *sch)
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{
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int mask, chp;
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struct chp_id chpid;
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chp_id_init(&chpid);
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for (chp = 0; chp <= 7; chp++) {
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mask = 0x80 >> chp;
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if (!get_chp_status(sch->schib.pmcw.chpid[chp]))
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chpid.id = sch->schib.pmcw.chpid[chp];
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if (!get_chp_status(chpid))
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/* disable using this path */
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sch->opm &= ~mask;
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}
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}
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void
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chpid_is_actually_online(int chp)
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void chpid_is_actually_online(struct chp_id chpid)
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{
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int state;
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state = get_chp_status(chp);
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state = get_chp_status(chpid);
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if (state < 0) {
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need_rescan = 1;
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queue_work(slow_path_wq, &slow_path_work);
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@ -200,11 +205,14 @@ css_get_ssd_info(struct subchannel *sch)
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spin_unlock_irq(sch->lock);
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free_page((unsigned long)page);
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if (!ret) {
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int j, chpid, mask;
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int j, mask;
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struct chp_id chpid;
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chp_id_init(&chpid);
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/* Allocate channel path structures, if needed. */
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for (j = 0; j < 8; j++) {
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mask = 0x80 >> j;
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chpid = sch->ssd_info.chpid[j];
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chpid.id = sch->ssd_info.chpid[j];
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if ((sch->schib.pmcw.pim & mask) &&
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(get_chp_status(chpid) < 0))
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new_channel_path(chpid);
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@ -227,7 +235,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
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for (j = 0; j < 8; j++) {
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mask = 0x80 >> j;
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if ((sch->schib.pmcw.pim & mask) &&
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(sch->schib.pmcw.chpid[j] == chpid->id))
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(sch->schib.pmcw.chpid[j] == chpid->chpid.id))
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break;
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}
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if (j >= 8)
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@ -277,18 +285,17 @@ out_unreg:
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return 0;
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}
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static void
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s390_set_chpid_offline( __u8 chpid)
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static void s390_set_chpid_offline(struct chp_id chpid)
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{
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char dbf_txt[15];
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struct device *dev;
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sprintf(dbf_txt, "chpr%x", chpid);
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sprintf(dbf_txt, "chpr%x.%02x", chpid.cssid, chpid.id);
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CIO_TRACE_EVENT(2, dbf_txt);
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if (get_chp_status(chpid) <= 0)
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return;
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dev = get_device(&css[0]->chps[chpid]->dev);
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dev = get_device(&(chpid_to_chp(chpid)->dev));
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bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev),
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s390_subchannel_remove_chpid);
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@ -316,7 +323,7 @@ s390_process_res_acc_sch(struct res_acc_data *res_data, struct subchannel *sch)
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* check if chpid is in information updated by ssd
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*/
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if (sch->ssd_info.valid &&
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sch->ssd_info.chpid[chp] == res_data->chp->id &&
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sch->ssd_info.chpid[chp] == res_data->chp->chpid.id &&
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(sch->ssd_info.fla[chp] & res_data->fla_mask)
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== res_data->fla) {
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found = 1;
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@ -409,7 +416,8 @@ s390_process_res_acc (struct res_acc_data *res_data)
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int rc;
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char dbf_txt[15];
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sprintf(dbf_txt, "accpr%x", res_data->chp->id);
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sprintf(dbf_txt, "accpr%x.%02x", res_data->chp->chpid.cssid,
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res_data->chp->chpid.id);
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CIO_TRACE_EVENT( 2, dbf_txt);
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if (res_data->fla != 0) {
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sprintf(dbf_txt, "fla%x", res_data->fla);
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@ -482,17 +490,21 @@ struct chsc_sei_area {
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static int chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
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{
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int chpid;
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struct chp_id chpid;
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int id;
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CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
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sei_area->rs, sei_area->rsid);
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if (sei_area->rs != 4)
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return 0;
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chpid = __get_chpid_from_lir(sei_area->ccdf);
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if (chpid < 0)
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id = __get_chpid_from_lir(sei_area->ccdf);
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if (id < 0)
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CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
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else
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else {
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chp_id_init(&chpid);
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chpid.id = id;
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s390_set_chpid_offline(chpid);
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}
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return 0;
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}
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@ -501,6 +513,7 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
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{
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struct res_acc_data res_data;
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struct device *dev;
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struct chp_id chpid;
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int status;
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int rc;
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@ -508,13 +521,15 @@ static int chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
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"rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
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if (sei_area->rs != 4)
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return 0;
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chp_id_init(&chpid);
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chpid.id = sei_area->rsid;
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/* allocate a new channel path structure, if needed */
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status = get_chp_status(sei_area->rsid);
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status = get_chp_status(chpid);
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if (status < 0)
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new_channel_path(sei_area->rsid);
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new_channel_path(chpid);
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else if (!status)
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return 0;
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dev = get_device(&css[0]->chps[sei_area->rsid]->dev);
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dev = get_device(&(chpid_to_chp(chpid)->dev));
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memset(&res_data, 0, sizeof(struct res_acc_data));
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res_data.chp = to_channelpath(dev);
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if ((sei_area->vf & 0xc0) != 0) {
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@ -631,7 +646,7 @@ __chp_add(struct subchannel_id schid, void *data)
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for (i=0; i<8; i++) {
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mask = 0x80 >> i;
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if ((sch->schib.pmcw.pim & mask) &&
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(sch->schib.pmcw.chpid[i] == chp->id)) {
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(sch->schib.pmcw.chpid[i] == chp->chpid.id)) {
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if (stsch(sch->schid, &sch->schib) != 0) {
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/* Endgame. */
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spin_unlock_irq(sch->lock);
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@ -657,8 +672,7 @@ __chp_add(struct subchannel_id schid, void *data)
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return 0;
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}
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static int
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chp_add(int chpid)
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static int chp_add(struct chp_id chpid)
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{
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int rc;
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char dbf_txt[15];
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@ -667,10 +681,10 @@ chp_add(int chpid)
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if (!get_chp_status(chpid))
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return 0; /* no need to do the rest */
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sprintf(dbf_txt, "cadd%x", chpid);
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sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id);
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CIO_TRACE_EVENT(2, dbf_txt);
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dev = get_device(&css[0]->chps[chpid]->dev);
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dev = get_device(&(chpid_to_chp(chpid)->dev));
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rc = for_each_subchannel(__chp_add, to_channelpath(dev));
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if (css_slow_subchannels_exist())
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rc = -EAGAIN;
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@ -683,9 +697,12 @@ chp_add(int chpid)
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/*
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* Handling of crw machine checks with channel path source.
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*/
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int
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chp_process_crw(int chpid, int on)
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int chp_process_crw(int id, int on)
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{
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struct chp_id chpid;
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chp_id_init(&chpid);
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chpid.id = id;
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if (on == 0) {
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/* Path has gone. We use the link incident routine.*/
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s390_set_chpid_offline(chpid);
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@ -733,8 +750,8 @@ static void terminate_internal_io(struct subchannel *sch)
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sch->driver->termination(&sch->dev);
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}
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static void
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__s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
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static void __s390_subchannel_vary_chpid(struct subchannel *sch,
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struct chp_id chpid, int on)
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{
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int chp, old_lpm;
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unsigned long flags;
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@ -745,7 +762,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
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spin_lock_irqsave(sch->lock, flags);
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old_lpm = sch->lpm;
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for (chp = 0; chp < 8; chp++) {
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if (sch->ssd_info.chpid[chp] != chpid)
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if (sch->ssd_info.chpid[chp] != chpid.id)
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continue;
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if (on) {
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@ -780,11 +797,10 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
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spin_unlock_irqrestore(sch->lock, flags);
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}
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static int
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s390_subchannel_vary_chpid_off(struct device *dev, void *data)
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static int s390_subchannel_vary_chpid_off(struct device *dev, void *data)
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{
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struct subchannel *sch;
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__u8 *chpid;
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struct chp_id *chpid;
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sch = to_subchannel(dev);
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chpid = data;
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@ -793,11 +809,10 @@ s390_subchannel_vary_chpid_off(struct device *dev, void *data)
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return 0;
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}
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static int
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s390_subchannel_vary_chpid_on(struct device *dev, void *data)
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static int s390_subchannel_vary_chpid_on(struct device *dev, void *data)
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{
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struct subchannel *sch;
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__u8 *chpid;
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struct chp_id *chpid;
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sch = to_subchannel(dev);
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chpid = data;
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@ -833,23 +848,25 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
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* Function: s390_vary_chpid
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* Varies the specified chpid online or offline
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*/
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static int
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s390_vary_chpid( __u8 chpid, int on)
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static int s390_vary_chpid(struct chp_id chpid, int on)
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{
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char dbf_text[15];
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int status;
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sprintf(dbf_text, on?"varyon%x":"varyoff%x", chpid);
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sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid,
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chpid.id);
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CIO_TRACE_EVENT( 2, dbf_text);
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status = get_chp_status(chpid);
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if (status < 0) {
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printk(KERN_ERR "Can't vary unknown chpid %02X\n", chpid);
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printk(KERN_ERR "Can't vary unknown chpid %x.%02x\n",
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chpid.cssid, chpid.id);
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return -EINVAL;
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}
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if (!on && !status) {
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printk(KERN_ERR "chpid %x is already offline\n", chpid);
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printk(KERN_ERR "chpid %x.%02x is already offline\n",
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chpid.cssid, chpid.id);
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return -EINVAL;
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}
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@ -904,20 +921,19 @@ static struct bin_attribute chp_measurement_chars_attr = {
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.read = chp_measurement_chars_read,
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};
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static void
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chp_measurement_copy_block(struct cmg_entry *buf,
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struct channel_subsystem *css, int chpid)
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static void chp_measurement_copy_block(struct cmg_entry *buf,
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struct channel_subsystem *css, struct chp_id chpid)
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{
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void *area;
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struct cmg_entry *entry, reference_buf;
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int idx;
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if (chpid < 128) {
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if (chpid.id < 128) {
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area = css->cub_addr1;
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idx = chpid;
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idx = chpid.id;
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} else {
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area = css->cub_addr2;
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idx = chpid - 128;
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idx = chpid.id - 128;
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}
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entry = area + (idx * sizeof(struct cmg_entry));
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do {
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@ -941,7 +957,7 @@ chp_measurement_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
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/* Only allow single reads. */
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if (off || count < size)
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return 0;
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chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->id);
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chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid);
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count = size;
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return count;
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}
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@ -1137,7 +1153,7 @@ chp_status_show(struct device *dev, struct device_attribute *attr, char *buf)
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if (!chp)
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return 0;
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return (get_chp_status(chp->id) ? sprintf(buf, "online\n") :
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return (get_chp_status(chp->chpid) ? sprintf(buf, "online\n") :
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sprintf(buf, "offline\n"));
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}
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@ -1154,9 +1170,9 @@ chp_status_write(struct device *dev, struct device_attribute *attr, const char *
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return count;
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if (!strnicmp(cmd, "on", 2))
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error = s390_vary_chpid(cp->id, 1);
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error = s390_vary_chpid(cp->chpid, 1);
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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);
|
||||
|
|
|
|||
|
|
@ -1,6 +1,10 @@
|
|||
#ifndef S390_CHSC_H
|
||||
#define S390_CHSC_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
#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);
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -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(
|
||||
|
|
|
|||
Loading…
Reference in a new issue