diff options
Diffstat (limited to 'drivers/s390/cio/chp.c')
| -rw-r--r-- | drivers/s390/cio/chp.c | 207 |
1 files changed, 130 insertions, 77 deletions
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c index 51038ec309c1..c10e2444507e 100644 --- a/drivers/s390/cio/chp.c +++ b/drivers/s390/cio/chp.c @@ -50,7 +50,7 @@ static unsigned long chp_info_expires; static struct work_struct cfg_work; /* Wait queue for configure completion events. */ -static wait_queue_head_t cfg_wait_queue; +static DECLARE_WAIT_QUEUE_HEAD(cfg_wait_queue); /* Set vary state for given chpid. */ static void set_chp_logically_online(struct chp_id chpid, int onoff) @@ -111,8 +111,9 @@ static int s390_vary_chpid(struct chp_id chpid, int on) char dbf_text[15]; int status; - sprintf(dbf_text, on?"varyon%x.%02x":"varyoff%x.%02x", chpid.cssid, - chpid.id); + scnprintf(dbf_text, sizeof(dbf_text), + on ? "varyon%x.%02x" : "varyoff%x.%02x", + chpid.cssid, chpid.id); CIO_TRACE_EVENT(2, dbf_text); status = chp_get_status(chpid); @@ -127,15 +128,14 @@ static int s390_vary_chpid(struct chp_id chpid, int on) /* * Channel measurement related functions */ -static ssize_t chp_measurement_chars_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count) +static ssize_t measurement_chars_read(struct file *filp, struct kobject *kobj, + const struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) { struct channel_path *chp; struct device *device; - device = container_of(kobj, struct device, kobj); + device = kobj_to_dev(kobj); chp = to_channelpath(device); if (chp->cmg == -1) return 0; @@ -143,87 +143,92 @@ static ssize_t chp_measurement_chars_read(struct file *filp, return memory_read_from_buffer(buf, count, &off, &chp->cmg_chars, sizeof(chp->cmg_chars)); } +static const BIN_ATTR_ADMIN_RO(measurement_chars, sizeof(struct cmg_chars)); -static const struct bin_attribute chp_measurement_chars_attr = { - .attr = { - .name = "measurement_chars", - .mode = S_IRUSR, - }, - .size = sizeof(struct cmg_chars), - .read = chp_measurement_chars_read, -}; - -static void chp_measurement_copy_block(struct cmg_entry *buf, - struct channel_subsystem *css, - struct chp_id chpid) +static ssize_t measurement_chars_full_read(struct file *filp, + struct kobject *kobj, + const struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) { - void *area; - struct cmg_entry *entry, reference_buf; - int idx; + struct channel_path *chp = to_channelpath(kobj_to_dev(kobj)); - if (chpid.id < 128) { - area = css->cub_addr1; - idx = chpid.id; - } else { - area = css->cub_addr2; - idx = chpid.id - 128; - } - entry = area + (idx * sizeof(struct cmg_entry)); - do { - memcpy(buf, entry, sizeof(*entry)); - memcpy(&reference_buf, entry, sizeof(*entry)); - } while (reference_buf.values[0] != buf->values[0]); + return memory_read_from_buffer(buf, count, &off, &chp->cmcb, + sizeof(chp->cmcb)); } +static BIN_ATTR_ADMIN_RO(measurement_chars_full, sizeof(struct cmg_cmcb)); -static ssize_t chp_measurement_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, - char *buf, loff_t off, size_t count) +static ssize_t chp_measurement_copy_block(void *buf, loff_t off, size_t count, + struct kobject *kobj, bool extended) { struct channel_path *chp; struct channel_subsystem *css; struct device *device; unsigned int size; + void *area, *entry; + int id, idx; - device = container_of(kobj, struct device, kobj); + device = kobj_to_dev(kobj); chp = to_channelpath(device); css = to_css(chp->dev.parent); + id = chp->chpid.id; - size = sizeof(struct cmg_entry); + if (extended) { + /* Check if extended measurement data is available. */ + if (!chp->extended) + return 0; + + size = sizeof(struct cmg_ext_entry); + area = css->ecub[id / CSS_ECUES_PER_PAGE]; + idx = id % CSS_ECUES_PER_PAGE; + } else { + size = sizeof(struct cmg_entry); + area = css->cub[id / CSS_CUES_PER_PAGE]; + idx = id % CSS_CUES_PER_PAGE; + } + entry = area + (idx * size); /* Only allow single reads. */ if (off || count < size) return 0; - chp_measurement_copy_block((struct cmg_entry *)buf, css, chp->chpid); - count = size; - return count; + + memcpy(buf, entry, size); + + return size; +} + +static ssize_t measurement_read(struct file *filp, struct kobject *kobj, + const struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + return chp_measurement_copy_block(buf, off, count, kobj, false); } +static const BIN_ATTR_ADMIN_RO(measurement, sizeof(struct cmg_entry)); -static const struct bin_attribute chp_measurement_attr = { - .attr = { - .name = "measurement", - .mode = S_IRUSR, - }, - .size = sizeof(struct cmg_entry), - .read = chp_measurement_read, +static ssize_t ext_measurement_read(struct file *filp, struct kobject *kobj, + const struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + return chp_measurement_copy_block(buf, off, count, kobj, true); +} +static const BIN_ATTR_ADMIN_RO(ext_measurement, sizeof(struct cmg_ext_entry)); + +static const struct bin_attribute *measurement_attrs[] = { + &bin_attr_measurement_chars, + &bin_attr_measurement_chars_full, + &bin_attr_measurement, + &bin_attr_ext_measurement, + NULL, }; +BIN_ATTRIBUTE_GROUPS(measurement); void chp_remove_cmg_attr(struct channel_path *chp) { - device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr); - device_remove_bin_file(&chp->dev, &chp_measurement_attr); + device_remove_groups(&chp->dev, measurement_groups); } int chp_add_cmg_attr(struct channel_path *chp) { - int ret; - - ret = device_create_bin_file(&chp->dev, &chp_measurement_chars_attr); - if (ret) - return ret; - ret = device_create_bin_file(&chp->dev, &chp_measurement_attr); - if (ret) - device_remove_bin_file(&chp->dev, &chp_measurement_chars_attr); - return ret; + return device_add_groups(&chp->dev, measurement_groups); } /* @@ -239,7 +244,7 @@ static ssize_t chp_status_show(struct device *dev, status = chp->state; mutex_unlock(&chp->lock); - return status ? sprintf(buf, "online\n") : sprintf(buf, "offline\n"); + return status ? sysfs_emit(buf, "online\n") : sysfs_emit(buf, "offline\n"); } static ssize_t chp_status_write(struct device *dev, @@ -255,6 +260,9 @@ static ssize_t chp_status_write(struct device *dev, if (!num_args) return count; + /* Wait until previous actions have settled. */ + css_wait_for_slow_path(); + if (!strncasecmp(cmd, "on", 2) || !strcmp(cmd, "1")) { mutex_lock(&cp->lock); error = s390_vary_chpid(cp->chpid, 1); @@ -282,7 +290,7 @@ static ssize_t chp_configure_show(struct device *dev, if (status < 0) return status; - return snprintf(buf, PAGE_SIZE, "%d\n", status); + return sysfs_emit(buf, "%d\n", status); } static int cfg_wait_idle(void); @@ -317,7 +325,7 @@ static ssize_t chp_type_show(struct device *dev, struct device_attribute *attr, mutex_lock(&chp->lock); type = chp->desc.desc; mutex_unlock(&chp->lock); - return sprintf(buf, "%x\n", type); + return sysfs_emit(buf, "%x\n", type); } static DEVICE_ATTR(type, 0444, chp_type_show, NULL); @@ -330,8 +338,8 @@ static ssize_t chp_cmg_show(struct device *dev, struct device_attribute *attr, if (!chp) return 0; if (chp->cmg == -1) /* channel measurements not available */ - return sprintf(buf, "unknown\n"); - return sprintf(buf, "%x\n", chp->cmg); + return sysfs_emit(buf, "unknown\n"); + return sysfs_emit(buf, "%d\n", chp->cmg); } static DEVICE_ATTR(cmg, 0444, chp_cmg_show, NULL); @@ -344,8 +352,8 @@ static ssize_t chp_shared_show(struct device *dev, if (!chp) return 0; if (chp->shared == -1) /* channel measurements not available */ - return sprintf(buf, "unknown\n"); - return sprintf(buf, "%x\n", chp->shared); + return sysfs_emit(buf, "unknown\n"); + return sysfs_emit(buf, "%x\n", chp->shared); } static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL); @@ -358,7 +366,7 @@ static ssize_t chp_chid_show(struct device *dev, struct device_attribute *attr, mutex_lock(&chp->lock); if (chp->desc_fmt1.flags & 0x10) - rc = sprintf(buf, "%04x\n", chp->desc_fmt1.chid); + rc = sysfs_emit(buf, "%04x\n", chp->desc_fmt1.chid); else rc = 0; mutex_unlock(&chp->lock); @@ -375,7 +383,7 @@ static ssize_t chp_chid_external_show(struct device *dev, mutex_lock(&chp->lock); if (chp->desc_fmt1.flags & 0x10) - rc = sprintf(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0); + rc = sysfs_emit(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0); else rc = 0; mutex_unlock(&chp->lock); @@ -384,8 +392,51 @@ static ssize_t chp_chid_external_show(struct device *dev, } static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL); +static ssize_t chp_esc_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct channel_path *chp = to_channelpath(dev); + ssize_t rc; + + mutex_lock(&chp->lock); + rc = sysfs_emit(buf, "%x\n", chp->desc_fmt1.esc); + mutex_unlock(&chp->lock); + + return rc; +} +static DEVICE_ATTR(esc, 0444, chp_esc_show, NULL); + +static char apply_max_suffix(unsigned long *value, unsigned long base) +{ + static char suffixes[] = { 0, 'K', 'M', 'G', 'T' }; + int i; + + for (i = 0; i < ARRAY_SIZE(suffixes) - 1; i++) { + if (*value < base || *value % base != 0) + break; + *value /= base; + } + + return suffixes[i]; +} + +static ssize_t speed_bps_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct channel_path *chp = to_channelpath(dev); + unsigned long speed = chp->speed; + char suffix; + + suffix = apply_max_suffix(&speed, 1000); + + return suffix ? sysfs_emit(buf, "%lu%c\n", speed, suffix) : + sysfs_emit(buf, "%lu\n", speed); +} + +static DEVICE_ATTR_RO(speed_bps); + static ssize_t util_string_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, char *buf, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct channel_path *chp = to_channelpath(kobj_to_dev(kobj)); @@ -398,10 +449,10 @@ static ssize_t util_string_read(struct file *filp, struct kobject *kobj, return rc; } -static BIN_ATTR_RO(util_string, - sizeof(((struct channel_path_desc_fmt3 *)0)->util_str)); +static const BIN_ATTR_RO(util_string, + sizeof(((struct channel_path_desc_fmt3 *)0)->util_str)); -static struct bin_attribute *chp_bin_attrs[] = { +static const struct bin_attribute *const chp_bin_attrs[] = { &bin_attr_util_string, NULL, }; @@ -414,9 +465,11 @@ static struct attribute *chp_attrs[] = { &dev_attr_shared.attr, &dev_attr_chid.attr, &dev_attr_chid_external.attr, + &dev_attr_esc.attr, + &dev_attr_speed_bps.attr, NULL, }; -static struct attribute_group chp_attr_group = { +static const struct attribute_group chp_attr_group = { .attrs = chp_attrs, .bin_attrs = chp_bin_attrs, }; @@ -643,7 +696,8 @@ static int info_update(void) if (time_after(jiffies, chp_info_expires)) { /* Data is too old, update. */ rc = sclp_chp_read_info(&chp_info); - chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL ; + if (!rc) + chp_info_expires = jiffies + CHP_INFO_UPDATE_INTERVAL; } mutex_unlock(&info_lock); @@ -814,7 +868,6 @@ static int __init chp_init(void) if (ret) return ret; INIT_WORK(&cfg_work, cfg_func); - init_waitqueue_head(&cfg_wait_queue); if (info_update()) return 0; /* Register available channel-paths. */ |