diff options
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 34 | ||||
| -rw-r--r-- | drivers/s390/cio/cio.c | 1 | ||||
| -rw-r--r-- | drivers/s390/cio/css.c | 12 | ||||
| -rw-r--r-- | drivers/s390/cio/css.h | 2 | ||||
| -rw-r--r-- | drivers/s390/cio/device_fsm.c | 85 | ||||
| -rw-r--r-- | drivers/s390/cio/device_pgid.c | 122 | ||||
| -rw-r--r-- | drivers/s390/cio/device_status.c | 7 |
7 files changed, 215 insertions, 48 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index a01f3bba4a7b..61ce3f1d5228 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1464,6 +1464,40 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no) return desc; } +static int reset_channel_path(struct channel_path *chp) +{ + int cc; + + cc = rchp(chp->id); + switch (cc) { + case 0: + return 0; + case 2: + return -EBUSY; + default: + return -ENODEV; + } +} + +static void reset_channel_paths_css(struct channel_subsystem *css) +{ + int i; + + for (i = 0; i <= __MAX_CHPID; i++) { + if (css->chps[i]) + reset_channel_path(css->chps[i]); + } +} + +void cio_reset_channel_paths(void) +{ + int i; + + for (i = 0; i <= __MAX_CSSID; i++) { + if (css[i] && css[i]->valid) + reset_channel_paths_css(css[i]); + } +} static int __init chsc_alloc_sei_area(void) diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index f27b2b866f5a..e36ca27f5777 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -876,5 +876,6 @@ void reipl(unsigned long devno) { clear_all_subchannels(); + cio_reset_channel_paths(); do_reipl(devno); } diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index a09deea5d687..13eeea3d547f 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -623,9 +623,13 @@ init_channel_subsystem (void) ret = device_register(&css[i]->device); if (ret) goto out_free; - if (css_characteristics_avail && css_chsc_characteristics.secm) - device_create_file(&css[i]->device, - &dev_attr_cm_enable); + if (css_characteristics_avail && + css_chsc_characteristics.secm) { + ret = device_create_file(&css[i]->device, + &dev_attr_cm_enable); + if (ret) + goto out_device; + } } css_init_done = 1; @@ -633,6 +637,8 @@ init_channel_subsystem (void) for_each_subchannel(__init_channel_subsystem, NULL); return 0; +out_device: + device_unregister(&css[i]->device); out_free: kfree(css[i]); out_unregister: diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index 15f7f7cb0ec2..8aabb4adeb5f 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -100,7 +100,7 @@ struct ccw_device_private { struct qdio_irq *qdio_data; struct irb irb; /* device status */ struct senseid senseid; /* SenseID info */ - struct pgid pgid; /* path group ID */ + struct pgid pgid[8]; /* path group IDs per chpid*/ struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ struct work_struct kick_work; wait_queue_head_t wait_q; diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index cb1af0b6f033..ac6e0c7e43d9 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -378,6 +378,56 @@ ccw_device_done(struct ccw_device *cdev, int state) put_device (&cdev->dev); } +static inline int cmp_pgid(struct pgid *p1, struct pgid *p2) +{ + char *c1; + char *c2; + + c1 = (char *)p1; + c2 = (char *)p2; + + return memcmp(c1 + 1, c2 + 1, sizeof(struct pgid) - 1); +} + +static void __ccw_device_get_common_pgid(struct ccw_device *cdev) +{ + int i; + int last; + + last = 0; + for (i = 0; i < 8; i++) { + if (cdev->private->pgid[i].inf.ps.state1 == SNID_STATE1_RESET) + /* No PGID yet */ + continue; + if (cdev->private->pgid[last].inf.ps.state1 == + SNID_STATE1_RESET) { + /* First non-zero PGID */ + last = i; + continue; + } + if (cmp_pgid(&cdev->private->pgid[i], + &cdev->private->pgid[last]) == 0) + /* Non-conflicting PGIDs */ + continue; + + /* PGID mismatch, can't pathgroup. */ + CIO_MSG_EVENT(0, "SNID - pgid mismatch for device " + "0.%x.%04x, can't pathgroup\n", + cdev->private->ssid, cdev->private->devno); + cdev->private->options.pgroup = 0; + return; + } + if (cdev->private->pgid[last].inf.ps.state1 == + SNID_STATE1_RESET) + /* No previous pgid found */ + memcpy(&cdev->private->pgid[0], &css[0]->global_pgid, + sizeof(struct pgid)); + else + /* Use existing pgid */ + memcpy(&cdev->private->pgid[0], &cdev->private->pgid[last], + sizeof(struct pgid)); +} + /* * Function called from device_pgid.c after sense path ground has completed. */ @@ -388,24 +438,26 @@ ccw_device_sense_pgid_done(struct ccw_device *cdev, int err) sch = to_subchannel(cdev->dev.parent); switch (err) { - case 0: - /* Start Path Group verification. */ - sch->vpm = 0; /* Start with no path groups set. */ - cdev->private->state = DEV_STATE_VERIFY; - ccw_device_verify_start(cdev); + case -EOPNOTSUPP: /* path grouping not supported, use nop instead. */ + cdev->private->options.pgroup = 0; + break; + case 0: /* success */ + case -EACCES: /* partial success, some paths not operational */ + /* Check if all pgids are equal or 0. */ + __ccw_device_get_common_pgid(cdev); break; case -ETIME: /* Sense path group id stopped by timeout. */ case -EUSERS: /* device is reserved for someone else. */ ccw_device_done(cdev, DEV_STATE_BOXED); - break; - case -EOPNOTSUPP: /* path grouping not supported, just set online. */ - cdev->private->options.pgroup = 0; - ccw_device_done(cdev, DEV_STATE_ONLINE); - break; + return; default: ccw_device_done(cdev, DEV_STATE_NOT_OPER); - break; + return; } + /* Start Path Group verification. */ + sch->vpm = 0; /* Start with no path groups set. */ + cdev->private->state = DEV_STATE_VERIFY; + ccw_device_verify_start(cdev); } /* @@ -562,8 +614,9 @@ ccw_device_online(struct ccw_device *cdev) } /* Do we want to do path grouping? */ if (!cdev->private->options.pgroup) { - /* No, set state online immediately. */ - ccw_device_done(cdev, DEV_STATE_ONLINE); + /* Start initial path verification. */ + cdev->private->state = DEV_STATE_VERIFY; + ccw_device_verify_start(cdev); return 0; } /* Do a SensePGID first. */ @@ -609,6 +662,7 @@ ccw_device_offline(struct ccw_device *cdev) /* Are we doing path grouping? */ if (!cdev->private->options.pgroup) { /* No, set state offline immediately. */ + sch->vpm = 0; ccw_device_done(cdev, DEV_STATE_OFFLINE); return 0; } @@ -705,8 +759,6 @@ ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event) { struct subchannel *sch; - if (!cdev->private->options.pgroup) - return; if (cdev->private->state == DEV_STATE_W4SENSE) { cdev->private->flags.doverify = 1; return; @@ -995,8 +1047,7 @@ static void ccw_device_wait4io_verify(struct ccw_device *cdev, enum dev_event dev_event) { /* When the I/O has terminated, we have to start verification. */ - if (cdev->private->options.pgroup) - cdev->private->flags.doverify = 1; + cdev->private->flags.doverify = 1; } static void diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index 54cb64ed0786..32610fd8868e 100644 --- a/drivers/s390/cio/device_pgid.c +++ b/drivers/s390/cio/device_pgid.c @@ -33,12 +33,17 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev) struct subchannel *sch; struct ccw1 *ccw; int ret; + int i; sch = to_subchannel(cdev->dev.parent); + /* Return if we already checked on all paths. */ + if (cdev->private->imask == 0) + return (sch->lpm == 0) ? -ENODEV : -EACCES; + i = 8 - ffs(cdev->private->imask); + /* Setup sense path group id channel program. */ ccw = cdev->private->iccws; ccw->cmd_code = CCW_CMD_SENSE_PGID; - ccw->cda = (__u32) __pa (&cdev->private->pgid); ccw->count = sizeof (struct pgid); ccw->flags = CCW_FLAG_SLI; @@ -48,6 +53,7 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev) ret = -ENODEV; while (cdev->private->imask != 0) { /* Try every path multiple times. */ + ccw->cda = (__u32) __pa (&cdev->private->pgid[i]); if (cdev->private->iretry > 0) { cdev->private->iretry--; ret = cio_start (sch, cdev->private->iccws, @@ -64,7 +70,9 @@ __ccw_device_sense_pgid_start(struct ccw_device *cdev) } cdev->private->imask >>= 1; cdev->private->iretry = 5; + i++; } + return ret; } @@ -76,7 +84,7 @@ ccw_device_sense_pgid_start(struct ccw_device *cdev) cdev->private->state = DEV_STATE_SENSE_PGID; cdev->private->imask = 0x80; cdev->private->iretry = 5; - memset (&cdev->private->pgid, 0, sizeof (struct pgid)); + memset (&cdev->private->pgid, 0, sizeof (cdev->private->pgid)); ret = __ccw_device_sense_pgid_start(cdev); if (ret && ret != -EBUSY) ccw_device_sense_pgid_done(cdev, ret); @@ -91,6 +99,7 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev) { struct subchannel *sch; struct irb *irb; + int i; sch = to_subchannel(cdev->dev.parent); irb = &cdev->private->irb; @@ -124,7 +133,8 @@ __ccw_device_check_sense_pgid(struct ccw_device *cdev) sch->schid.sch_no, sch->orb.lpm); return -EACCES; } - if (cdev->private->pgid.inf.ps.state2 == SNID_STATE2_RESVD_ELSE) { + i = 8 - ffs(cdev->private->imask); + if (cdev->private->pgid[i].inf.ps.state2 == SNID_STATE2_RESVD_ELSE) { CIO_MSG_EVENT(2, "SNID - Device %04x on Subchannel 0.%x.%04x " "is reserved by someone else\n", cdev->private->devno, sch->schid.ssid, @@ -162,12 +172,6 @@ ccw_device_sense_pgid_irq(struct ccw_device *cdev, enum dev_event dev_event) memset(&cdev->private->irb, 0, sizeof(struct irb)); switch (ret) { /* 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, &css[0]->global_pgid, - sizeof(struct pgid)); - ccw_device_sense_pgid_done(cdev, 0); - break; case -EOPNOTSUPP: /* Sense Path Group ID not supported */ ccw_device_sense_pgid_done(cdev, -EOPNOTSUPP); break; @@ -176,13 +180,15 @@ ccw_device_sense_pgid_irq(struct ccw_device *cdev, enum dev_event dev_event) break; case -EACCES: /* channel is not operational. */ sch->lpm &= ~cdev->private->imask; + /* Fall through. */ + case 0: /* Sense Path Group ID successful. */ cdev->private->imask >>= 1; cdev->private->iretry = 5; /* Fall through. */ case -EAGAIN: /* Try again. */ ret = __ccw_device_sense_pgid_start(cdev); if (ret != 0 && ret != -EBUSY) - ccw_device_sense_pgid_done(cdev, -ENODEV); + ccw_device_sense_pgid_done(cdev, ret); break; case -EUSERS: /* device is reserved for someone else. */ ccw_device_sense_pgid_done(cdev, -EUSERS); @@ -203,20 +209,20 @@ __ccw_device_do_pgid(struct ccw_device *cdev, __u8 func) sch = to_subchannel(cdev->dev.parent); /* Setup sense path group id channel program. */ - cdev->private->pgid.inf.fc = func; + cdev->private->pgid[0].inf.fc = func; ccw = cdev->private->iccws; if (!cdev->private->flags.pgid_single) { - cdev->private->pgid.inf.fc |= SPID_FUNC_MULTI_PATH; + cdev->private->pgid[0].inf.fc |= SPID_FUNC_MULTI_PATH; ccw->cmd_code = CCW_CMD_SUSPEND_RECONN; ccw->cda = 0; ccw->count = 0; ccw->flags = CCW_FLAG_SLI | CCW_FLAG_CC; ccw++; } else - cdev->private->pgid.inf.fc |= SPID_FUNC_SINGLE_PATH; + cdev->private->pgid[0].inf.fc |= SPID_FUNC_SINGLE_PATH; ccw->cmd_code = CCW_CMD_SET_PGID; - ccw->cda = (__u32) __pa (&cdev->private->pgid); + ccw->cda = (__u32) __pa (&cdev->private->pgid[0]); ccw->count = sizeof (struct pgid); ccw->flags = CCW_FLAG_SLI; @@ -244,6 +250,48 @@ __ccw_device_do_pgid(struct ccw_device *cdev, __u8 func) } /* + * Helper function to send a nop ccw down a path. + */ +static int __ccw_device_do_nop(struct ccw_device *cdev) +{ + struct subchannel *sch; + struct ccw1 *ccw; + int ret; + + sch = to_subchannel(cdev->dev.parent); + + /* Setup nop channel program. */ + ccw = cdev->private->iccws; + ccw->cmd_code = CCW_CMD_NOOP; + ccw->cda = 0; + ccw->count = 0; + ccw->flags = CCW_FLAG_SLI; + + /* Reset device status. */ + memset(&cdev->private->irb, 0, sizeof(struct irb)); + + /* Try multiple times. */ + ret = -ENODEV; + if (cdev->private->iretry > 0) { + cdev->private->iretry--; + ret = cio_start (sch, cdev->private->iccws, + cdev->private->imask); + /* ret is 0, -EBUSY, -EACCES or -ENODEV */ + if ((ret != -EACCES) && (ret != -ENODEV)) + return ret; + } + /* nop command failed on this path. Switch it off. */ + sch->lpm &= ~cdev->private->imask; + sch->vpm &= ~cdev->private->imask; + CIO_MSG_EVENT(2, "NOP - Device %04x on Subchannel " + "0.%x.%04x, lpm %02X, became 'not operational'\n", + cdev->private->devno, sch->schid.ssid, + sch->schid.sch_no, cdev->private->imask); + return ret; +} + + +/* * Called from interrupt context to check if a valid answer * to Set Path Group ID was received. */ @@ -282,6 +330,29 @@ __ccw_device_check_pgid(struct ccw_device *cdev) return 0; } +/* + * Called from interrupt context to check the path status after a nop has + * been send. + */ +static int __ccw_device_check_nop(struct ccw_device *cdev) +{ + struct subchannel *sch; + struct irb *irb; + + sch = to_subchannel(cdev->dev.parent); + irb = &cdev->private->irb; + if (irb->scsw.fctl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) + return -ETIME; + if (irb->scsw.cc == 3) { + CIO_MSG_EVENT(2, "NOP - Device %04x on Subchannel 0.%x.%04x," + " lpm %02X, became 'not operational'\n", + cdev->private->devno, sch->schid.ssid, + sch->schid.sch_no, cdev->private->imask); + return -EACCES; + } + return 0; +} + static void __ccw_device_verify_start(struct ccw_device *cdev) { @@ -296,9 +367,12 @@ __ccw_device_verify_start(struct ccw_device *cdev) if ((sch->vpm & imask) != (sch->lpm & imask)) break; cdev->private->imask = imask; - func = (sch->vpm & imask) ? - SPID_FUNC_RESIGN : SPID_FUNC_ESTABLISH; - ret = __ccw_device_do_pgid(cdev, func); + if (cdev->private->options.pgroup) { + func = (sch->vpm & imask) ? + SPID_FUNC_RESIGN : SPID_FUNC_ESTABLISH; + ret = __ccw_device_do_pgid(cdev, func); + } else + ret = __ccw_device_do_nop(cdev); if (ret == 0 || ret == -EBUSY) return; cdev->private->iretry = 5; @@ -327,7 +401,10 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event) if (ccw_device_accumulate_and_sense(cdev, irb) != 0) return; sch = to_subchannel(cdev->dev.parent); - ret = __ccw_device_check_pgid(cdev); + if (cdev->private->options.pgroup) + ret = __ccw_device_check_pgid(cdev); + else + ret = __ccw_device_check_nop(cdev); memset(&cdev->private->irb, 0, sizeof(struct irb)); switch (ret) { /* 0, -ETIME, -EAGAIN, -EOPNOTSUPP or -EACCES */ @@ -345,11 +422,10 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event) * One of those strange devices which claim to be able * to do multipathing but not for Set Path Group ID. */ - if (cdev->private->flags.pgid_single) { - ccw_device_verify_done(cdev, -EOPNOTSUPP); - break; - } - cdev->private->flags.pgid_single = 1; + if (cdev->private->flags.pgid_single) + cdev->private->options.pgroup = 0; + else + cdev->private->flags.pgid_single = 1; /* fall through. */ case -EAGAIN: /* Try again. */ __ccw_device_verify_start(cdev); diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c index 14bef2c179bf..caf148d5caad 100644 --- a/drivers/s390/cio/device_status.c +++ b/drivers/s390/cio/device_status.c @@ -67,8 +67,7 @@ ccw_device_path_notoper(struct ccw_device *cdev) sch->schib.pmcw.pnom); sch->lpm &= ~sch->schib.pmcw.pnom; - if (cdev->private->options.pgroup) - cdev->private->flags.doverify = 1; + cdev->private->flags.doverify = 1; } /* @@ -180,7 +179,7 @@ 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; @@ -354,7 +353,7 @@ ccw_device_accumulate_basic_sense(struct ccw_device *cdev, struct irb *irb) } /* 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; } |