diff options
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r-- | drivers/s390/cio/chsc.c | 15 | ||||
-rw-r--r-- | drivers/s390/cio/cio.c | 30 | ||||
-rw-r--r-- | drivers/s390/cio/cio.h | 1 | ||||
-rw-r--r-- | drivers/s390/cio/css.c | 16 | ||||
-rw-r--r-- | drivers/s390/cio/css.h | 1 | ||||
-rw-r--r-- | drivers/s390/cio/device.c | 1 | ||||
-rw-r--r-- | drivers/s390/cio/device.h | 1 | ||||
-rw-r--r-- | drivers/s390/cio/device_ops.c | 9 | ||||
-rw-r--r-- | drivers/s390/cio/device_status.c | 8 | ||||
-rw-r--r-- | drivers/s390/cio/qdio.c | 180 | ||||
-rw-r--r-- | drivers/s390/cio/qdio.h | 28 |
11 files changed, 173 insertions, 117 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 007aaeb4f53..5de86908b0d 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -217,6 +217,8 @@ void chsc_chp_offline(struct chp_id chpid) if (chp_get_status(chpid) <= 0) return; + /* Wait until previous actions have settled. */ + css_wait_for_slow_path(); for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &chpid); } @@ -303,7 +305,8 @@ static void s390_process_res_acc (struct res_acc_data *res_data) sprintf(dbf_txt, "fla%x", res_data->fla); CIO_TRACE_EVENT( 2, dbf_txt); } - + /* Wait until previous actions have settled. */ + css_wait_for_slow_path(); /* * I/O resources may have become accessible. * Scan through all subchannels that may be concerned and @@ -561,9 +564,12 @@ void chsc_chp_online(struct chp_id chpid) sprintf(dbf_txt, "cadd%x.%02x", chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_txt); - if (chp_get_status(chpid) != 0) + if (chp_get_status(chpid) != 0) { + /* Wait until previous actions have settled. */ + css_wait_for_slow_path(); for_each_subchannel_staged(__chp_add, __chp_add_new_sch, &chpid); + } } static void __s390_subchannel_vary_chpid(struct subchannel *sch, @@ -650,6 +656,8 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data) */ int chsc_chp_vary(struct chp_id chpid, int on) { + /* Wait until previous actions have settled. */ + css_wait_for_slow_path(); /* * Redo PathVerification on the devices the chpid connects to */ @@ -758,7 +766,6 @@ chsc_secm(struct channel_subsystem *css, int enable) if (!secm_area) return -ENOMEM; - mutex_lock(&css->mutex); if (enable && !css->cm_enabled) { css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); @@ -766,7 +773,6 @@ chsc_secm(struct channel_subsystem *css, int enable) free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); free_page((unsigned long)secm_area); - mutex_unlock(&css->mutex); return -ENOMEM; } } @@ -787,7 +793,6 @@ chsc_secm(struct channel_subsystem *css, int enable) free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); } - mutex_unlock(&css->mutex); free_page((unsigned long)secm_area); return ret; } diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 60590a12d52..23ffcc4768a 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -24,6 +24,7 @@ #include <asm/ipl.h> #include <asm/chpid.h> #include <asm/airq.h> +#include <asm/cpu.h> #include "cio.h" #include "css.h" #include "chsc.h" @@ -649,13 +650,10 @@ do_IRQ (struct pt_regs *regs) old_regs = set_irq_regs(regs); irq_enter(); - asm volatile ("mc 0,0"); - if (S390_lowcore.int_clock >= S390_lowcore.jiffy_timer) - /** - * Make sure that the i/o interrupt did not "overtake" - * the last HZ timer interrupt. - */ - account_ticks(S390_lowcore.int_clock); + s390_idle_check(); + if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator) + /* Serve timer interrupts first. */ + clock_comparator_work(); /* * Get interrupt information from lowcore */ @@ -672,10 +670,14 @@ do_IRQ (struct pt_regs *regs) continue; } sch = (struct subchannel *)(unsigned long)tpi_info->intparm; - if (sch) - spin_lock(sch->lock); + if (!sch) { + /* Clear pending interrupt condition. */ + tsch(tpi_info->schid, irb); + continue; + } + spin_lock(sch->lock); /* Store interrupt response block to lowcore. */ - if (tsch (tpi_info->schid, irb) == 0 && sch) { + if (tsch(tpi_info->schid, irb) == 0) { /* Keep subchannel information word up to date. */ memcpy (&sch->schib.scsw, &irb->scsw, sizeof (irb->scsw)); @@ -683,8 +685,7 @@ do_IRQ (struct pt_regs *regs) if (sch->driver && sch->driver->irq) sch->driver->irq(sch); } - if (sch) - spin_unlock(sch->lock); + spin_unlock(sch->lock); /* * Are more interrupts pending? * If so, the tpi instruction will update the lowcore @@ -710,8 +711,9 @@ void *cio_get_console_priv(void) /* * busy wait for the next interrupt on the console */ -void -wait_cons_dev (void) +void wait_cons_dev(void) + __releases(console_subchannel.lock) + __acquires(console_subchannel.lock) { unsigned long cr6 __attribute__ ((aligned (8))); unsigned long save_cr6 __attribute__ ((aligned (8))); diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h index 52afa4c784d..08f2235c5a6 100644 --- a/drivers/s390/cio/cio.h +++ b/drivers/s390/cio/cio.h @@ -100,6 +100,7 @@ extern int cio_modify (struct subchannel *); int cio_create_sch_lock(struct subchannel *); void do_adapter_IO(void); +void do_IRQ(struct pt_regs *); /* Use with care. */ #ifdef CONFIG_CCW_CONSOLE diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index 3b45bbe6cce..c1afab5f72d 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -533,6 +533,12 @@ void css_schedule_eval_all(void) spin_unlock_irqrestore(&slow_subchannel_lock, flags); } +void css_wait_for_slow_path(void) +{ + flush_workqueue(ccw_device_notify_work); + flush_workqueue(slow_path_wq); +} + /* Reprobe subchannel if unregistered. */ static int reprobe_subchannel(struct subchannel_id schid, void *data) { @@ -683,10 +689,14 @@ css_cm_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct channel_subsystem *css = to_css(dev); + int ret; if (!css) return 0; - return sprintf(buf, "%x\n", css->cm_enabled); + mutex_lock(&css->mutex); + ret = sprintf(buf, "%x\n", css->cm_enabled); + mutex_unlock(&css->mutex); + return ret; } static ssize_t @@ -696,6 +706,7 @@ css_cm_enable_store(struct device *dev, struct device_attribute *attr, struct channel_subsystem *css = to_css(dev); int ret; + mutex_lock(&css->mutex); switch (buf[0]) { case '0': ret = css->cm_enabled ? chsc_secm(css, 0) : 0; @@ -706,6 +717,7 @@ css_cm_enable_store(struct device *dev, struct device_attribute *attr, default: ret = -EINVAL; } + mutex_unlock(&css->mutex); return ret < 0 ? ret : count; } @@ -752,9 +764,11 @@ static int css_reboot_event(struct notifier_block *this, struct channel_subsystem *css; css = channel_subsystems[i]; + mutex_lock(&css->mutex); if (css->cm_enabled) if (chsc_secm(css, 0)) ret = NOTIFY_BAD; + mutex_unlock(&css->mutex); } return ret; diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h index b7055452355..e1913518f35 100644 --- a/drivers/s390/cio/css.h +++ b/drivers/s390/cio/css.h @@ -144,6 +144,7 @@ struct schib; int css_sch_is_valid(struct schib *); extern struct workqueue_struct *slow_path_wq; +void css_wait_for_slow_path(void); extern struct attribute_group *subch_attr_groups[]; #endif diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index fec004f62bc..e0c7adb8958 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -577,7 +577,6 @@ static DEVICE_ATTR(devtype, 0444, devtype_show, NULL); static DEVICE_ATTR(cutype, 0444, cutype_show, NULL); static DEVICE_ATTR(modalias, 0444, modalias_show, NULL); static DEVICE_ATTR(online, 0644, online_show, online_store); -extern struct device_attribute dev_attr_cmb_enable; static DEVICE_ATTR(availability, 0444, available_show, NULL); static struct attribute * subch_attrs[] = { diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h index d40a2ffaa00..cb08092be39 100644 --- a/drivers/s390/cio/device.h +++ b/drivers/s390/cio/device.h @@ -127,4 +127,5 @@ extern struct bus_type ccw_bus_type; void retry_set_schib(struct ccw_device *cdev); void cmf_retry_copy_block(struct ccw_device *); int cmf_reenable(struct ccw_device *); +extern struct device_attribute dev_attr_cmb_enable; #endif diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index 49b58eb0fab..a1718a0aa53 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -193,8 +193,15 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, return -EACCES; } ret = cio_start_key (sch, cpa, lpm, key); - if (ret == 0) + switch (ret) { + case 0: cdev->private->intparm = intparm; + break; + case -EACCES: + case -ENODEV: + dev_fsm_event(cdev, DEV_EVENT_VERIFY); + break; + } return ret; } diff --git a/drivers/s390/cio/device_status.c b/drivers/s390/cio/device_status.c index ebe0848cfe3..4a38993000f 100644 --- a/drivers/s390/cio/device_status.c +++ b/drivers/s390/cio/device_status.c @@ -62,7 +62,7 @@ ccw_device_path_notoper(struct ccw_device *cdev) stsch (sch->schid, &sch->schib); CIO_MSG_EVENT(0, "%s(0.%x.%04x) - path(s) %02x are " - "not operational \n", __FUNCTION__, + "not operational \n", __func__, sch->schid.ssid, sch->schid.sch_no, sch->schib.pmcw.pnom); @@ -312,6 +312,7 @@ 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); @@ -337,7 +338,10 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb) /* Reset internal retry indication. */ cdev->private->flags.intretry = 0; - return cio_start(sch, sense_ccw, 0xff); + rc = cio_start(sch, sense_ccw, 0xff); + if (rc == -ENODEV || rc == -EACCES) + dev_fsm_event(cdev, DEV_EVENT_VERIFY); + return rc; } /* diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c index 2b5bfb7c69e..c359386708e 100644 --- a/drivers/s390/cio/qdio.c +++ b/drivers/s390/cio/qdio.c @@ -1399,7 +1399,7 @@ __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set) * q->dev_st_chg_ind is the indicator, be it shared or not. * only clear it, if indicator is non-shared */ - if (!spare_ind_was_set) + if (q->dev_st_chg_ind != &spare_indicator) tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind); if (q->hydra_gives_outbound_pcis) { @@ -2217,9 +2217,78 @@ qdio_synchronize(struct ccw_device *cdev, unsigned int flags, return cc; } +static int +qdio_get_ssqd_information(struct subchannel_id *schid, + struct qdio_chsc_ssqd **ssqd_area) +{ + int result; + + QDIO_DBF_TEXT0(0, setup, "getssqd"); + *ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC); + if (!ssqd_area) { + QDIO_PRINT_WARN("Could not get memory for chsc on sch x%x.\n", + schid->sch_no); + return -ENOMEM; + } + + (*ssqd_area)->request = (struct chsc_header) { + .length = 0x0010, + .code = 0x0024, + }; + (*ssqd_area)->first_sch = schid->sch_no; + (*ssqd_area)->last_sch = schid->sch_no; + (*ssqd_area)->ssid = schid->ssid; + result = chsc(*ssqd_area); + + if (result) { + QDIO_PRINT_WARN("CHSC returned cc %i on sch 0.%x.%x.\n", + result, schid->ssid, schid->sch_no); + goto out; + } + + if ((*ssqd_area)->response.code != QDIO_CHSC_RESPONSE_CODE_OK) { + QDIO_PRINT_WARN("CHSC response is 0x%x on sch 0.%x.%x.\n", + (*ssqd_area)->response.code, + schid->ssid, schid->sch_no); + goto out; + } + if (!((*ssqd_area)->flags & CHSC_FLAG_QDIO_CAPABILITY) || + !((*ssqd_area)->flags & CHSC_FLAG_VALIDITY) || + ((*ssqd_area)->sch != schid->sch_no)) { + QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \ + "using all SIGAs.\n", + schid->ssid, schid->sch_no); + goto out; + } + return 0; +out: + return -EINVAL; +} + +int +qdio_get_ssqd_pct(struct ccw_device *cdev) +{ + struct qdio_chsc_ssqd *ssqd_area; + struct subchannel_id schid; + char dbf_text[15]; + int rc; + int pct = 0; + + QDIO_DBF_TEXT0(0, setup, "getpct"); + schid = ccw_device_get_subchannel_id(cdev); + rc = qdio_get_ssqd_information(&schid, &ssqd_area); + if (!rc) + pct = (int)ssqd_area->pct; + if (rc != -ENOMEM) + mempool_free(ssqd_area, qdio_mempool_scssc); + sprintf(dbf_text, "pct: %d", pct); + QDIO_DBF_TEXT2(0, setup, dbf_text); + return pct; +} +EXPORT_SYMBOL(qdio_get_ssqd_pct); + static void -qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac, - unsigned long token) +qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned long token) { struct qdio_q *q; int i; @@ -2227,7 +2296,7 @@ qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac, char dbf_text[15]; /*check if QEBSM is disabled */ - if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) { + if (!(irq_ptr->is_qebsm) || !(irq_ptr->qdioac & 0x01)) { irq_ptr->is_qebsm = 0; irq_ptr->sch_token = 0; irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; @@ -2256,102 +2325,27 @@ qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac, } static void -qdio_get_ssqd_information(struct qdio_irq *irq_ptr) +qdio_get_ssqd_siga(struct qdio_irq *irq_ptr) { - int result; - unsigned char qdioac; - struct { - struct chsc_header request; - u16 reserved1:10; - u16 ssid:2; - u16 fmt:4; - u16 first_sch; - u16 reserved2; - u16 last_sch; - u32 reserved3; - struct chsc_header response; - u32 reserved4; - u8 flags; - u8 reserved5; - u16 sch; - u8 qfmt; - u8 parm; - u8 qdioac1; - u8 sch_class; - u8 reserved7; - u8 icnt; - u8 reserved8; - u8 ocnt; - u8 reserved9; - u8 mbccnt; - u16 qdioac2; - u64 sch_token; - } *ssqd_area; + int rc; + struct qdio_chsc_ssqd *ssqd_area; QDIO_DBF_TEXT0(0,setup,"getssqd"); - qdioac = 0; - ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC); - if (!ssqd_area) { - QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \ - "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no); + irq_ptr->qdioac = 0; + rc = qdio_get_ssqd_information(&irq_ptr->schid, &ssqd_area); + if (rc) { + QDIO_PRINT_WARN("using all SIGAs for sch x%x.n", + irq_ptr->schid.sch_no); irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY | CHSC_FLAG_SIGA_OUTPUT_NECESSARY | CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ irq_ptr->is_qebsm = 0; - irq_ptr->sch_token = 0; - irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; - return; - } - - ssqd_area->request = (struct chsc_header) { - .length = 0x0010, - .code = 0x0024, - }; - ssqd_area->first_sch = irq_ptr->schid.sch_no; - ssqd_area->last_sch = irq_ptr->schid.sch_no; - ssqd_area->ssid = irq_ptr->schid.ssid; - result = chsc(ssqd_area); - - if (result) { - QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \ - "SIGAs for sch 0.%x.%x.\n", result, - irq_ptr->schid.ssid, irq_ptr->schid.sch_no); - qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY | - CHSC_FLAG_SIGA_OUTPUT_NECESSARY | - CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ - irq_ptr->is_qebsm = 0; - goto out; - } + } else + irq_ptr->qdioac = ssqd_area->qdioac1; - if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) { - QDIO_PRINT_WARN("response upon checking SIGA needs " \ - "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n", - ssqd_area->response.code, - irq_ptr->schid.ssid, irq_ptr->schid.sch_no); - qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY | - CHSC_FLAG_SIGA_OUTPUT_NECESSARY | - CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */ - irq_ptr->is_qebsm = 0; - goto out; - } - if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) || - !(ssqd_area->flags & CHSC_FLAG_VALIDITY) || - (ssqd_area->sch != irq_ptr->schid.sch_no)) { - QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \ - "using all SIGAs.\n", - irq_ptr->schid.ssid, irq_ptr->schid.sch_no); - qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY | - CHSC_FLAG_SIGA_OUTPUT_NECESSARY | - CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */ - irq_ptr->is_qebsm = 0; - goto out; - } - qdioac = ssqd_area->qdioac1; -out: - qdio_check_subchannel_qebsm(irq_ptr, qdioac, - ssqd_area->sch_token); - mempool_free(ssqd_area, qdio_mempool_scssc); - irq_ptr->qdioac = qdioac; + qdio_check_subchannel_qebsm(irq_ptr, ssqd_area->sch_token); + if (rc != -ENOMEM) + mempool_free(ssqd_area, qdio_mempool_scssc); } static unsigned int @@ -3227,7 +3221,7 @@ qdio_establish(struct qdio_initialize *init_data) return -EIO; } - qdio_get_ssqd_information(irq_ptr); + qdio_get_ssqd_siga(irq_ptr); /* if this gets set once, we're running under VM and can omit SVSes */ if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY) omit_svs=1; diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index da8a272fd75..c3df6b2c38b 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -406,6 +406,34 @@ do_clear_global_summary(void) #define CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS 0x08 #define CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS 0x04 +struct qdio_chsc_ssqd { + struct chsc_header request; + u16 reserved1:10; + u16 ssid:2; + u16 fmt:4; + u16 first_sch; + u16 reserved2; + u16 last_sch; + u32 reserved3; + struct chsc_header response; + u32 reserved4; + u8 flags; + u8 reserved5; + u16 sch; + u8 qfmt; + u8 parm; + u8 qdioac1; + u8 sch_class; + u8 pct; + u8 icnt; + u8 reserved7; + u8 ocnt; + u8 reserved8; + u8 mbccnt; + u16 qdioac2; + u64 sch_token; +}; + struct qdio_perf_stats { #ifdef CONFIG_64BIT atomic64_t tl_runs; |