From: Cornelia Huck Date: Fri, 6 Jan 2006 08:19:23 +0000 (-0800) Subject: [PATCH] s390: introduce struct channel_subsystem X-Git-Tag: v2.6.16-rc1~936^2~107 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a28c69448154a0901e8815922030c5dcd2f8e388;p=linux-2.6 [PATCH] s390: introduce struct channel_subsystem struct channel_subsystem encapsulates several per channel subsystem properties, like status of chpids or the global path group id. Signed-off-by: Cornelia Huck Signed-off-by: Martin Schwidefsky Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 78e082311f..ebd924962d 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -24,8 +24,6 @@ #include "ioasm.h" #include "chsc.h" -static struct channel_path *chps[NR_CHPIDS]; - static void *sei_page; static int new_channel_path(int chpid); @@ -33,13 +31,13 @@ static int new_channel_path(int chpid); static inline void set_chp_logically_online(int chp, int onoff) { - chps[chp]->state = onoff; + css[0]->chps[chp]->state = onoff; } static int get_chp_status(int chp) { - return (chps[chp] ? chps[chp]->state : -ENODEV); + return (css[0]->chps[chp] ? css[0]->chps[chp]->state : -ENODEV); } void @@ -219,13 +217,13 @@ s390_subchannel_remove_chpid(struct device *dev, void *data) int j; int mask; struct subchannel *sch; - __u8 *chpid; + struct channel_path *chpid; struct schib schib; sch = to_subchannel(dev); chpid = data; for (j = 0; j < 8; j++) - if (sch->schib.pmcw.chpid[j] == *chpid) + if (sch->schib.pmcw.chpid[j] == chpid->id) break; if (j >= 8) return 0; @@ -296,18 +294,20 @@ static inline void s390_set_chpid_offline( __u8 chpid) { char dbf_txt[15]; + struct device *dev; sprintf(dbf_txt, "chpr%x", chpid); CIO_TRACE_EVENT(2, dbf_txt); if (get_chp_status(chpid) <= 0) return; - - bus_for_each_dev(&css_bus_type, NULL, &chpid, + dev = get_device(&css[0]->chps[chpid]->dev); + bus_for_each_dev(&css_bus_type, NULL, to_channelpath(dev), s390_subchannel_remove_chpid); if (need_rescan || css_slow_subchannels_exist()) queue_work(slow_path_wq, &slow_path_work); + put_device(dev); } struct res_acc_data { @@ -511,6 +511,7 @@ chsc_process_crw(void) ret = 0; do { int ccode, status; + struct device *dev; memset(sei_area, 0, sizeof(*sei_area)); memset(&res_data, 0, sizeof(struct res_acc_data)); sei_area->request = (struct chsc_header) { @@ -586,7 +587,8 @@ chsc_process_crw(void) new_channel_path(sei_area->rsid); else if (!status) break; - res_data.chp = chps[sei_area->rsid]; + dev = get_device(&css[0]->chps[sei_area->rsid]->dev); + res_data.chp = to_channelpath(dev); pr_debug("chpid: %x", sei_area->rsid); if ((sei_area->vf & 0xc0) != 0) { res_data.fla = sei_area->fla; @@ -602,6 +604,7 @@ chsc_process_crw(void) } ret = s390_process_res_acc(&res_data); pr_debug("\n\n"); + put_device(dev); break; default: /* other stuff */ @@ -678,6 +681,7 @@ chp_add(int chpid) { int rc; char dbf_txt[15]; + struct device *dev; if (!get_chp_status(chpid)) return 0; /* no need to do the rest */ @@ -685,11 +689,13 @@ chp_add(int chpid) sprintf(dbf_txt, "cadd%x", chpid); CIO_TRACE_EVENT(2, dbf_txt); - rc = for_each_subchannel(__chp_add, chps[chpid]); + dev = get_device(&css[0]->chps[chpid]->dev); + rc = for_each_subchannel(__chp_add, to_channelpath(dev)); if (css_slow_subchannels_exist()) rc = -EAGAIN; if (rc != -EAGAIN) rc = 0; + put_device(dev); return rc; } @@ -1016,7 +1022,7 @@ new_channel_path(int chpid) chp->id = chpid; chp->state = 1; chp->dev = (struct device) { - .parent = &css_bus_device, + .parent = &css[0]->device, .release = chp_release, }; snprintf(chp->dev.bus_id, BUS_ID_SIZE, "chp0.%x", chpid); @@ -1038,7 +1044,7 @@ new_channel_path(int chpid) device_unregister(&chp->dev); goto out_free; } else - chps[chpid] = chp; + css[0]->chps[chpid] = chp; return ret; out_free: kfree(chp); @@ -1051,7 +1057,7 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no) struct channel_path *chp; struct channel_path_desc *desc; - chp = chps[sch->schib.pmcw.chpid[chp_no]]; + chp = css[0]->chps[sch->schib.pmcw.chpid[chp_no]]; 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 69450134be..170083ca43 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -1,8 +1,6 @@ #ifndef S390_CHSC_H #define S390_CHSC_H -#define NR_CHPIDS 256 - #define CHSC_SEI_ACC_CHPID 1 #define CHSC_SEI_ACC_LINKADDR 2 #define CHSC_SEI_ACC_FULLLINKADDR 3 @@ -65,4 +63,7 @@ extern int chsc_determine_css_characteristics(void); extern int css_characteristics_avail; extern void *chsc_get_chp_desc(struct subchannel*, int); + +#define to_channelpath(dev) container_of(dev, struct channel_path, dev) + #endif diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index dba632a5f7..b6225cbbbe 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -24,12 +24,9 @@ int need_rescan = 0; int css_init_done = 0; -struct pgid global_pgid; -int css_characteristics_avail = 0; +struct channel_subsystem *css[__MAX_CSSID + 1]; -struct device css_bus_device = { - .bus_id = "css0", -}; +int css_characteristics_avail = 0; inline int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *data) @@ -112,7 +109,7 @@ css_register_subchannel(struct subchannel *sch) int ret; /* Initialize the subchannel structure */ - sch->dev.parent = &css_bus_device; + sch->dev.parent = &css[0]->device; sch->dev.bus = &css_bus_type; sch->dev.release = &css_subchannel_release; @@ -421,21 +418,35 @@ __init_channel_subsystem(struct subchannel_id schid, void *data) } static void __init -css_generate_pgid(void) +css_generate_pgid(struct channel_subsystem *css, u32 tod_high) { - /* Let's build our path group ID here. */ - if (css_characteristics_avail && css_general_characteristics.mcss) - global_pgid.cpu_addr = 0x8000; - else { + if (css_characteristics_avail && css_general_characteristics.mcss) { + css->global_pgid.pgid_high.ext_cssid.version = 0x80; + css->global_pgid.pgid_high.ext_cssid.cssid = css->cssid; + } else { #ifdef CONFIG_SMP - global_pgid.cpu_addr = hard_smp_processor_id(); + css->global_pgid.pgid_high.cpu_addr = hard_smp_processor_id(); #else - global_pgid.cpu_addr = 0; + css->global_pgid.pgid_high.cpu_addr = 0; #endif } - global_pgid.cpu_id = ((cpuid_t *) __LC_CPUID)->ident; - global_pgid.cpu_model = ((cpuid_t *) __LC_CPUID)->machine; - global_pgid.tod_high = (__u32) (get_clock() >> 32); + css->global_pgid.cpu_id = ((cpuid_t *) __LC_CPUID)->ident; + css->global_pgid.cpu_model = ((cpuid_t *) __LC_CPUID)->machine; + css->global_pgid.tod_high = tod_high; + +} + +static inline void __init +setup_css(int nr) +{ + u32 tod_high; + + memset(css[nr], 0, sizeof(struct channel_subsystem)); + css[nr]->valid = 1; + css[nr]->cssid = nr; + sprintf(css[nr]->device.bus_id, "css%x", nr); + tod_high = (u32) (get_clock() >> 32); + css_generate_pgid(css[nr], tod_high); } /* @@ -446,25 +457,39 @@ css_generate_pgid(void) static int __init init_channel_subsystem (void) { - int ret; + int ret, i; if (chsc_determine_css_characteristics() == 0) css_characteristics_avail = 1; - css_generate_pgid(); - if ((ret = bus_register(&css_bus_type))) goto out; - if ((ret = device_register (&css_bus_device))) - goto out_bus; + /* Setup css structure. */ + for (i = 0; i <= __MAX_CSSID; i++) { + css[i] = kmalloc(sizeof(struct channel_subsystem), GFP_KERNEL); + if (!css[i]) { + ret = -ENOMEM; + goto out_bus; + } + setup_css(i); + ret = device_register(&css[i]->device); + if (ret) + goto out_free; + } css_init_done = 1; ctl_set_bit(6, 28); for_each_subchannel(__init_channel_subsystem, NULL); return 0; +out_free: + kfree(css[i]); out_bus: + while (i > 0) { + i--; + device_unregister(&css[i]->device); + } bus_unregister(&css_bus_type); out: return ret; diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 71efca2547..b74659cab0 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -35,19 +35,25 @@ struct path_state { __u8 resvd : 3; /* reserved */ } __attribute__ ((packed)); +struct extended_cssid { + u8 version; + u8 cssid; +} __attribute__ ((packed)); + struct pgid { union { __u8 fc; /* SPID function code */ struct path_state ps; /* SNID path state */ } inf; - __u32 cpu_addr : 16; /* CPU address */ + union { + __u32 cpu_addr : 16; /* CPU address */ + struct extended_cssid ext_cssid; + } pgid_high; __u32 cpu_id : 24; /* CPU identification */ __u32 cpu_model : 16; /* CPU model */ __u32 tod_high; /* high word TOD clock */ } __attribute__ ((packed)); -extern struct pgid global_pgid; - #define MAX_CIWS 8 /* @@ -129,9 +135,20 @@ extern int css_init_done; extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); #define __MAX_SUBCHANNEL 65535 +#define __MAX_CHPID 255 +#define __MAX_CSSID 0 + +struct channel_subsystem { + u8 cssid; + int valid; + struct channel_path *chps[__MAX_CHPID]; + struct device device; + struct pgid global_pgid; +}; +#define to_css(dev) container_of(dev, struct channel_subsystem, device) extern struct bus_type css_bus_type; -extern struct device css_bus_device; +extern struct channel_subsystem *css[]; /* Some helper functions for disconnected state. */ int device_is_disconnected(struct subchannel *); diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 9ac07aeffb..ba9f7c11f6 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -986,10 +986,6 @@ ccw_device_console_enable (struct ccw_device *cdev, struct subchannel *sch) cdev->dev = (struct device) { .parent = &sch->dev, }; - /* Initialize the subchannel structure */ - sch->dev.parent = &css_bus_device; - sch->dev.bus = &css_bus_type; - rc = io_subchannel_recog(cdev, sch); if (rc) return rc; diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index f08e84cc35..3c89d70b9c 100644 --- a/drivers/s390/cio/device_pgid.c +++ b/drivers/s390/cio/device_pgid.c @@ -164,7 +164,7 @@ ccw_device_sense_pgid_irq(struct ccw_device *cdev, enum dev_event dev_event) /* 0, -ETIME, -EOPNOTSUPP, -EAGAIN, -EACCES or -EUSERS */ case 0: /* Sense Path Group ID successful. */ if (cdev->private->pgid.inf.ps.state1 == SNID_STATE1_RESET) - memcpy(&cdev->private->pgid, &global_pgid, + memcpy(&cdev->private->pgid, &css[0]->global_pgid, sizeof(struct pgid)); ccw_device_sense_pgid_done(cdev, 0); break;