diff options
Diffstat (limited to 'drivers/s390/cio/device_status.c')
| -rw-r--r-- | drivers/s390/cio/device_status.c | 199 |
1 files changed, 106 insertions, 93 deletions
diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c index 12a24d4331a..15b56a15db1 100644 --- a/drivers/s390/cio/device_status.c +++ b/drivers/s390/cio/device_status.c @@ -1,15 +1,11 @@ /* - * drivers/s390/cio/device_status.c - * - * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, - * IBM Corporation - * Author(s): Cornelia Huck(cohuck@de.ibm.com) + * Copyright IBM Corp. 2002 + * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) * Martin Schwidefsky (schwidefsky@de.ibm.com) * * Status accumulation and basic sense functions. */ -#include <linux/config.h> #include <linux/module.h> #include <linux/init.h> @@ -21,33 +17,31 @@ #include "css.h" #include "device.h" #include "ioasm.h" +#include "io_sch.h" /* * Check for any kind of channel or interface control check but don't * issue the message for the console device */ -static inline void +static void ccw_device_msg_control_check(struct ccw_device *cdev, struct irb *irb) { - if (!(irb->scsw.cstat & (SCHN_STAT_CHN_DATA_CHK | - SCHN_STAT_CHN_CTRL_CHK | - SCHN_STAT_INTF_CTRL_CHK))) + char dbf_text[15]; + + if (!scsw_is_valid_cstat(&irb->scsw) || + !(scsw_cstat(&irb->scsw) & (SCHN_STAT_CHN_DATA_CHK | + SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK))) return; - CIO_MSG_EVENT(0, "Channel-Check or Interface-Control-Check " "received" - " ... device %04X on subchannel %04X, dev_stat " + " ... device %04x on subchannel 0.%x.%04x, dev_stat " ": %02X sch_stat : %02X\n", - cdev->private->devno, cdev->private->irq, - irb->scsw.dstat, irb->scsw.cstat); - - if (irb->scsw.cc != 3) { - char dbf_text[15]; - - sprintf(dbf_text, "chk%x", cdev->private->irq); - CIO_TRACE_EVENT(0, dbf_text); - CIO_HEX_EVENT(0, irb, sizeof (struct irb)); - } + cdev->private->dev_id.devno, cdev->private->schid.ssid, + cdev->private->schid.sch_no, + scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw)); + sprintf(dbf_text, "chk%x", cdev->private->schid.sch_no); + CIO_TRACE_EVENT(0, dbf_text); + CIO_HEX_EVENT(0, irb, sizeof(struct irb)); } /* @@ -59,21 +53,23 @@ ccw_device_path_notoper(struct ccw_device *cdev) struct subchannel *sch; sch = to_subchannel(cdev->dev.parent); - stsch (sch->irq, &sch->schib); + if (cio_update_schib(sch)) + goto doverify; - CIO_MSG_EVENT(0, "%s(%04x) - path(s) %02x are " - "not operational \n", __FUNCTION__, sch->irq, + CIO_MSG_EVENT(0, "%s(0.%x.%04x) - path(s) %02x are " + "not operational \n", __func__, + sch->schid.ssid, sch->schid.sch_no, sch->schib.pmcw.pnom); sch->lpm &= ~sch->schib.pmcw.pnom; - if (cdev->private->options.pgroup) - cdev->private->flags.doverify = 1; +doverify: + cdev->private->flags.doverify = 1; } /* * Copy valid bits from the extended control word to device irb. */ -static inline void +static void ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb) { /* @@ -81,12 +77,12 @@ ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb) * are condition that have to be met for the extended control * bit to have meaning. Sick. */ - cdev->private->irb.scsw.ectl = 0; - if ((irb->scsw.stctl & SCSW_STCTL_ALERT_STATUS) && - !(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS)) - cdev->private->irb.scsw.ectl = irb->scsw.ectl; + cdev->private->irb.scsw.cmd.ectl = 0; + if ((irb->scsw.cmd.stctl & SCSW_STCTL_ALERT_STATUS) && + !(irb->scsw.cmd.stctl & SCSW_STCTL_INTER_STATUS)) + cdev->private->irb.scsw.cmd.ectl = irb->scsw.cmd.ectl; /* Check if extended control word is valid. */ - if (!cdev->private->irb.scsw.ectl) + if (!cdev->private->irb.scsw.cmd.ectl) return; /* Copy concurrent sense / model dependent information. */ memcpy (&cdev->private->irb.ecw, irb->ecw, sizeof (irb->ecw)); @@ -95,14 +91,15 @@ ccw_device_accumulate_ecw(struct ccw_device *cdev, struct irb *irb) /* * Check if extended status word is valid. */ -static inline int +static int ccw_device_accumulate_esw_valid(struct irb *irb) { - if (!irb->scsw.eswf && irb->scsw.stctl == SCSW_STCTL_STATUS_PEND) + if (!irb->scsw.cmd.eswf && + (irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND)) return 0; - if (irb->scsw.stctl == - (SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) && - !(irb->scsw.actl & SCSW_ACTL_SUSPENDED)) + if (irb->scsw.cmd.stctl == + (SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND) && + !(irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)) return 0; return 1; } @@ -110,7 +107,7 @@ ccw_device_accumulate_esw_valid(struct irb *irb) /* * Copy valid bits from the extended status word to device irb. */ -static inline void +static void ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) { struct irb *cdev_irb; @@ -125,7 +122,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) cdev_irb->esw.esw1.lpum = irb->esw.esw1.lpum; /* Copy subchannel logout information if esw is of format 0. */ - if (irb->scsw.eswf) { + if (irb->scsw.cmd.eswf) { cdev_sublog = &cdev_irb->esw.esw0.sublog; sublog = &irb->esw.esw0.sublog; /* Copy extended status flags. */ @@ -134,7 +131,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) * Copy fields that have a meaning for channel data check * channel control check and interface control check. */ - if (irb->scsw.cstat & (SCHN_STAT_CHN_DATA_CHK | + if (irb->scsw.cmd.cstat & (SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK)) { /* Copy ancillary report bit. */ @@ -155,7 +152,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) /* Copy i/o-error alert. */ cdev_sublog->ioerr = sublog->ioerr; /* Copy channel path timeout bit. */ - if (irb->scsw.cstat & SCHN_STAT_INTF_CTRL_CHK) + if (irb->scsw.cmd.cstat & SCHN_STAT_INTF_CTRL_CHK) cdev_irb->esw.esw0.erw.cpt = irb->esw.esw0.erw.cpt; /* Copy failing storage address validity flag. */ cdev_irb->esw.esw0.erw.fsavf = irb->esw.esw0.erw.fsavf; @@ -179,7 +176,7 @@ ccw_device_accumulate_esw(struct ccw_device *cdev, struct irb *irb) cdev_irb->esw.esw0.erw.auth = irb->esw.esw0.erw.auth; /* Copy path verification required flag. */ cdev_irb->esw.esw0.erw.pvrf = irb->esw.esw0.erw.pvrf; - if (irb->esw.esw0.erw.pvrf && cdev->private->options.pgroup) + if (irb->esw.esw0.erw.pvrf) cdev->private->flags.doverify = 1; /* Copy concurrent sense bit. */ cdev_irb->esw.esw0.erw.cons = irb->esw.esw0.erw.cons; @@ -200,77 +197,90 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb) * If not, the remaining bit have no meaning and we must ignore them. * The esw is not meaningful as well... */ - if (!(irb->scsw.stctl & SCSW_STCTL_STATUS_PEND)) + if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) return; /* Check for channel checks and interface control checks. */ ccw_device_msg_control_check(cdev, irb); /* Check for path not operational. */ - if (irb->scsw.pno && irb->scsw.fctl != 0 && - (!(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS) || - (irb->scsw.actl & SCSW_ACTL_SUSPENDED))) + if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw)) ccw_device_path_notoper(cdev); - + /* No irb accumulation for transport mode irbs. */ + if (scsw_is_tm(&irb->scsw)) { + memcpy(&cdev->private->irb, irb, sizeof(struct irb)); + return; + } /* * Don't accumulate unsolicited interrupts. */ - if ((irb->scsw.stctl == - (SCSW_STCTL_STATUS_PEND | SCSW_STCTL_ALERT_STATUS)) && - (!irb->scsw.cc)) + if (!scsw_is_solicited(&irb->scsw)) return; cdev_irb = &cdev->private->irb; + /* + * If the clear function had been performed, all formerly pending + * status at the subchannel has been cleared and we must not pass + * intermediate accumulated status to the device driver. + */ + if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) + memset(&cdev->private->irb, 0, sizeof(struct irb)); + /* Copy bits which are valid only for the start function. */ - if (irb->scsw.fctl & SCSW_FCTL_START_FUNC) { + if (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) { /* Copy key. */ - cdev_irb->scsw.key = irb->scsw.key; + cdev_irb->scsw.cmd.key = irb->scsw.cmd.key; /* Copy suspend control bit. */ - cdev_irb->scsw.sctl = irb->scsw.sctl; + cdev_irb->scsw.cmd.sctl = irb->scsw.cmd.sctl; /* Accumulate deferred condition code. */ - cdev_irb->scsw.cc |= irb->scsw.cc; + cdev_irb->scsw.cmd.cc |= irb->scsw.cmd.cc; /* Copy ccw format bit. */ - cdev_irb->scsw.fmt = irb->scsw.fmt; + cdev_irb->scsw.cmd.fmt = irb->scsw.cmd.fmt; /* Copy prefetch bit. */ - cdev_irb->scsw.pfch = irb->scsw.pfch; + cdev_irb->scsw.cmd.pfch = irb->scsw.cmd.pfch; /* Copy initial-status-interruption-control. */ - cdev_irb->scsw.isic = irb->scsw.isic; + cdev_irb->scsw.cmd.isic = irb->scsw.cmd.isic; /* Copy address limit checking control. */ - cdev_irb->scsw.alcc = irb->scsw.alcc; + cdev_irb->scsw.cmd.alcc = irb->scsw.cmd.alcc; /* Copy suppress suspend bit. */ - cdev_irb->scsw.ssi = irb->scsw.ssi; + cdev_irb->scsw.cmd.ssi = irb->scsw.cmd.ssi; } /* Take care of the extended control bit and extended control word. */ ccw_device_accumulate_ecw(cdev, irb); /* Accumulate function control. */ - cdev_irb->scsw.fctl |= irb->scsw.fctl; + cdev_irb->scsw.cmd.fctl |= irb->scsw.cmd.fctl; /* Copy activity control. */ - cdev_irb->scsw.actl= irb->scsw.actl; + cdev_irb->scsw.cmd.actl = irb->scsw.cmd.actl; /* Accumulate status control. */ - cdev_irb->scsw.stctl |= irb->scsw.stctl; + cdev_irb->scsw.cmd.stctl |= irb->scsw.cmd.stctl; /* * Copy ccw address if it is valid. This is a bit simplified * but should be close enough for all practical purposes. */ - if ((irb->scsw.stctl & SCSW_STCTL_PRIM_STATUS) || - ((irb->scsw.stctl == + if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) || + ((irb->scsw.cmd.stctl == (SCSW_STCTL_INTER_STATUS|SCSW_STCTL_STATUS_PEND)) && - (irb->scsw.actl & SCSW_ACTL_DEVACT) && - (irb->scsw.actl & SCSW_ACTL_SCHACT)) || - (irb->scsw.actl & SCSW_ACTL_SUSPENDED)) - cdev_irb->scsw.cpa = irb->scsw.cpa; + (irb->scsw.cmd.actl & SCSW_ACTL_DEVACT) && + (irb->scsw.cmd.actl & SCSW_ACTL_SCHACT)) || + (irb->scsw.cmd.actl & SCSW_ACTL_SUSPENDED)) + cdev_irb->scsw.cmd.cpa = irb->scsw.cmd.cpa; /* Accumulate device status, but not the device busy flag. */ - cdev_irb->scsw.dstat &= ~DEV_STAT_BUSY; - cdev_irb->scsw.dstat |= irb->scsw.dstat; + cdev_irb->scsw.cmd.dstat &= ~DEV_STAT_BUSY; + /* dstat is not always valid. */ + if (irb->scsw.cmd.stctl & + (SCSW_STCTL_PRIM_STATUS | SCSW_STCTL_SEC_STATUS + | SCSW_STCTL_INTER_STATUS | SCSW_STCTL_ALERT_STATUS)) + cdev_irb->scsw.cmd.dstat |= irb->scsw.cmd.dstat; /* Accumulate subchannel status. */ - cdev_irb->scsw.cstat |= irb->scsw.cstat; + cdev_irb->scsw.cmd.cstat |= irb->scsw.cmd.cstat; /* Copy residual count if it is valid. */ - if ((irb->scsw.stctl & SCSW_STCTL_PRIM_STATUS) && - (irb->scsw.cstat & ~(SCHN_STAT_PCI | SCHN_STAT_INCORR_LEN)) == 0) - cdev_irb->scsw.count = irb->scsw.count; + if ((irb->scsw.cmd.stctl & SCSW_STCTL_PRIM_STATUS) && + (irb->scsw.cmd.cstat & ~(SCHN_STAT_PCI | SCHN_STAT_INCORR_LEN)) + == 0) + cdev_irb->scsw.cmd.count = irb->scsw.cmd.count; /* Take care of bits in the extended status word. */ ccw_device_accumulate_esw(cdev, irb); @@ -287,7 +297,7 @@ ccw_device_accumulate_irb(struct ccw_device *cdev, struct irb *irb) * sense facility available/supported when enabling the * concurrent sense facility. */ - if ((cdev_irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && + if ((cdev_irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && !(cdev_irb->esw.esw0.erw.cons)) cdev->private->flags.dosense = 1; } @@ -299,11 +309,13 @@ int ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) { struct subchannel *sch; + struct ccw1 *sense_ccw; + int rc; sch = to_subchannel(cdev->dev.parent); /* A sense is required, can we do it now ? */ - if ((irb->scsw.actl & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0) + if (scsw_actl(&irb->scsw) & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) /* * we received an Unit Check but we have no final * status yet, therefore we must delay the SENSE @@ -315,13 +327,16 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) /* * We have ending status but no sense information. Do a basic sense. */ - sch = to_subchannel(cdev->dev.parent); - sch->sense_ccw.cmd_code = CCW_CMD_BASIC_SENSE; - sch->sense_ccw.cda = (__u32) __pa(cdev->private->irb.ecw); - sch->sense_ccw.count = SENSE_MAX_COUNT; - sch->sense_ccw.flags = CCW_FLAG_SLI; - - return cio_start (sch, &sch->sense_ccw, 0xff); + sense_ccw = &to_io_private(sch)->sense_ccw; + sense_ccw->cmd_code = CCW_CMD_BASIC_SENSE; + sense_ccw->cda = (__u32) __pa(cdev->private->irb.ecw); + sense_ccw->count = SENSE_MAX_COUNT; + sense_ccw->flags = CCW_FLAG_SLI; + + rc = cio_start(sch, sense_ccw, 0xff); + if (rc == -ENODEV || rc == -EACCES) + dev_fsm_event(cdev, DEV_EVENT_VERIFY); + return rc; } /* @@ -335,26 +350,24 @@ ccw_device_accumulate_basic_sense(struct ccw_device *cdev, struct irb *irb) * If not, the remaining bit have no meaning and we must ignore them. * The esw is not meaningful as well... */ - if (!(irb->scsw.stctl & SCSW_STCTL_STATUS_PEND)) + if (!(scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) return; /* Check for channel checks and interface control checks. */ ccw_device_msg_control_check(cdev, irb); /* Check for path not operational. */ - if (irb->scsw.pno && irb->scsw.fctl != 0 && - (!(irb->scsw.stctl & SCSW_STCTL_INTER_STATUS) || - (irb->scsw.actl & SCSW_ACTL_SUSPENDED))) + if (scsw_is_valid_pno(&irb->scsw) && scsw_pno(&irb->scsw)) ccw_device_path_notoper(cdev); - if (!(irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && - (irb->scsw.dstat & DEV_STAT_CHN_END)) { + if (!(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && + (irb->scsw.cmd.dstat & DEV_STAT_CHN_END)) { cdev->private->irb.esw.esw0.erw.cons = 1; cdev->private->flags.dosense = 0; } /* Check if path verification is required. */ if (ccw_device_accumulate_esw_valid(irb) && - irb->esw.esw0.erw.pvrf && cdev->private->options.pgroup) + irb->esw.esw0.erw.pvrf) cdev->private->flags.doverify = 1; } @@ -366,11 +379,11 @@ int ccw_device_accumulate_and_sense(struct ccw_device *cdev, struct irb *irb) { ccw_device_accumulate_irb(cdev, irb); - if ((irb->scsw.actl & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0) + if ((irb->scsw.cmd.actl & (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT)) != 0) return -EBUSY; /* Check for basic sense. */ if (cdev->private->flags.dosense && - !(irb->scsw.dstat & DEV_STAT_UNIT_CHECK)) { + !(irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)) { cdev->private->irb.esw.esw0.erw.cons = 1; cdev->private->flags.dosense = 0; return 0; |