diff options
Diffstat (limited to 'drivers/s390/cio/chp.c')
| -rw-r--r-- | drivers/s390/cio/chp.c | 116 |
1 files changed, 86 insertions, 30 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c index 297cdceb0ca..db00b059173 100644 --- a/drivers/s390/cio/chp.c +++ b/drivers/s390/cio/chp.c @@ -18,6 +18,7 @@ #include <asm/chpid.h> #include <asm/sclp.h> +#include "../s390mach.h" #include "cio.h" #include "css.h" #include "ioasm.h" @@ -94,6 +95,7 @@ u8 chp_get_sch_opm(struct subchannel *sch) } return opm; } +EXPORT_SYMBOL_GPL(chp_get_sch_opm); /** * chp_is_registered - check if a channel-path is registered @@ -121,11 +123,8 @@ static int s390_vary_chpid(struct chp_id chpid, int on) CIO_TRACE_EVENT(2, dbf_text); status = chp_get_status(chpid); - if (!on && !status) { - printk(KERN_ERR "cio: chpid %x.%02x is already offline\n", - chpid.cssid, chpid.id); - return -EINVAL; - } + if (!on && !status) + return 0; set_chp_logically_online(chpid, on); chsc_chp_vary(chpid, on); @@ -141,21 +140,14 @@ static ssize_t chp_measurement_chars_read(struct kobject *kobj, { struct channel_path *chp; struct device *device; - unsigned int size; device = container_of(kobj, struct device, kobj); chp = to_channelpath(device); if (!chp->cmg_chars) return 0; - size = sizeof(struct cmg_chars); - - if (off > size) - return 0; - if (off + count > size) - count = size - off; - memcpy(buf, chp->cmg_chars + off, count); - return count; + return memory_read_from_buffer(buf, count, &off, + chp->cmg_chars, sizeof(struct cmg_chars)); } static struct bin_attribute chp_measurement_chars_attr = { @@ -405,7 +397,7 @@ int chp_new(struct chp_id chpid) chpid.id); /* Obtain channel path description and fill it in. */ - ret = chsc_determine_channel_path_description(chpid, &chp->desc); + ret = chsc_determine_base_channel_path_desc(chpid, &chp->desc); if (ret) goto out_free; if ((chp->desc.flags & 0x80) == 0) { @@ -413,8 +405,7 @@ int chp_new(struct chp_id chpid) goto out_free; } /* Get channel-measurement characteristics. */ - if (css_characteristics_avail && css_chsc_characteristics.scmc - && css_chsc_characteristics.secm) { + if (css_chsc_characteristics.scmc && css_chsc_characteristics.secm) { ret = chsc_get_channel_measurement_chars(chp); if (ret) goto out_free; @@ -476,26 +467,74 @@ void *chp_get_chp_desc(struct chp_id chpid) /** * chp_process_crw - process channel-path status change - * @id: channel-path ID number - * @status: non-zero if channel-path has become available, zero otherwise + * @crw0: channel report-word to handler + * @crw1: second channel-report word (always NULL) + * @overflow: crw overflow indication * * Handle channel-report-words indicating that the status of a channel-path * has changed. */ -void chp_process_crw(int id, int status) +static void chp_process_crw(struct crw *crw0, struct crw *crw1, + int overflow) { struct chp_id chpid; + if (overflow) { + css_schedule_eval_all(); + return; + } + CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, " + "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", + crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc, + crw0->erc, crw0->rsid); + /* + * Check for solicited machine checks. These are + * created by reset channel path and need not be + * handled here. + */ + if (crw0->slct) { + CIO_CRW_EVENT(2, "solicited machine check for " + "channel path %02X\n", crw0->rsid); + return; + } chp_id_init(&chpid); - chpid.id = id; - if (status) { + chpid.id = crw0->rsid; + switch (crw0->erc) { + case CRW_ERC_IPARM: /* Path has come. */ if (!chp_is_registered(chpid)) chp_new(chpid); chsc_chp_online(chpid); - } else + break; + case CRW_ERC_PERRI: /* Path has gone. */ + case CRW_ERC_PERRN: chsc_chp_offline(chpid); + break; + default: + CIO_CRW_EVENT(2, "Don't know how to handle erc=%x\n", + crw0->erc); + } } +int chp_ssd_get_mask(struct chsc_ssd_info *ssd, struct chp_link *link) +{ + int i; + int mask; + + for (i = 0; i < 8; i++) { + mask = 0x80 >> i; + if (!(ssd->path_mask & mask)) + continue; + if (!chp_id_is_equal(&ssd->chpid[i], &link->chpid)) + continue; + if ((ssd->fla_valid_mask & mask) && + ((ssd->fla[i] & link->fla_mask) != link->fla)) + continue; + return mask; + } + return 0; +} +EXPORT_SYMBOL_GPL(chp_ssd_get_mask); + static inline int info_bit_num(struct chp_id id) { return id.id + id.cssid * (__MAX_CHPID + 1); @@ -575,6 +614,7 @@ static void cfg_func(struct work_struct *work) { struct chp_id chpid; enum cfg_task_t t; + int rc; mutex_lock(&cfg_lock); t = cfg_none; @@ -589,14 +629,24 @@ static void cfg_func(struct work_struct *work) switch (t) { case cfg_configure: - sclp_chp_configure(chpid); - info_expire(); - chsc_chp_online(chpid); + rc = sclp_chp_configure(chpid); + if (rc) + CIO_MSG_EVENT(2, "chp: sclp_chp_configure(%x.%02x)=" + "%d\n", chpid.cssid, chpid.id, rc); + else { + info_expire(); + chsc_chp_online(chpid); + } break; case cfg_deconfigure: - sclp_chp_deconfigure(chpid); - info_expire(); - chsc_chp_offline(chpid); + rc = sclp_chp_deconfigure(chpid); + if (rc) + CIO_MSG_EVENT(2, "chp: sclp_chp_deconfigure(%x.%02x)=" + "%d\n", chpid.cssid, chpid.id, rc); + else { + info_expire(); + chsc_chp_offline(chpid); + } break; case cfg_none: /* Get updated information after last change. */ @@ -654,10 +704,16 @@ static int cfg_wait_idle(void) static int __init chp_init(void) { struct chp_id chpid; + int ret; + ret = s390_register_crw_handler(CRW_RSC_CPATH, chp_process_crw); + if (ret) + return ret; chp_wq = create_singlethread_workqueue("cio_chp"); - if (!chp_wq) + if (!chp_wq) { + s390_unregister_crw_handler(CRW_RSC_CPATH); return -ENOMEM; + } INIT_WORK(&cfg_work, cfg_func); init_waitqueue_head(&cfg_wait_queue); if (info_update()) |