diff options
Diffstat (limited to 'drivers/s390/crypto/ap_card.c')
| -rw-r--r-- | drivers/s390/crypto/ap_card.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c new file mode 100644 index 000000000000..0110d44172a3 --- /dev/null +++ b/drivers/s390/crypto/ap_card.c @@ -0,0 +1,170 @@ +/* + * Copyright IBM Corp. 2016 + * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> + * + * Adjunct processor bus, card related code. + */ + +#define KMSG_COMPONENT "ap" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/init.h> +#include <linux/slab.h> +#include <asm/facility.h> + +#include "ap_bus.h" +#include "ap_asm.h" + +/* + * AP card related attributes. + */ +static ssize_t ap_hwtype_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + + return snprintf(buf, PAGE_SIZE, "%d\n", ac->ap_dev.device_type); +} + +static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL); + +static ssize_t ap_raw_hwtype_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + + return snprintf(buf, PAGE_SIZE, "%d\n", ac->raw_hwtype); +} + +static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL); + +static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + + return snprintf(buf, PAGE_SIZE, "%d\n", ac->queue_depth); +} + +static DEVICE_ATTR(depth, 0444, ap_depth_show, NULL); + +static ssize_t ap_functions_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + + return snprintf(buf, PAGE_SIZE, "0x%08X\n", ac->functions); +} + +static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL); + +static ssize_t ap_request_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + unsigned int req_cnt; + + req_cnt = 0; + spin_lock_bh(&ap_list_lock); + req_cnt = atomic_read(&ac->total_request_count); + spin_unlock_bh(&ap_list_lock); + return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt); +} + +static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL); + +static ssize_t ap_requestq_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + struct ap_queue *aq; + unsigned int reqq_cnt; + + reqq_cnt = 0; + spin_lock_bh(&ap_list_lock); + for_each_ap_queue(aq, ac) + reqq_cnt += aq->requestq_count; + spin_unlock_bh(&ap_list_lock); + return snprintf(buf, PAGE_SIZE, "%d\n", reqq_cnt); +} + +static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL); + +static ssize_t ap_pendingq_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ap_card *ac = to_ap_card(dev); + struct ap_queue *aq; + unsigned int penq_cnt; + + penq_cnt = 0; + spin_lock_bh(&ap_list_lock); + for_each_ap_queue(aq, ac) + penq_cnt += aq->pendingq_count; + spin_unlock_bh(&ap_list_lock); + return snprintf(buf, PAGE_SIZE, "%d\n", penq_cnt); +} + +static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL); + +static ssize_t ap_modalias_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "ap:t%02X\n", to_ap_dev(dev)->device_type); +} + +static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL); + +static struct attribute *ap_card_dev_attrs[] = { + &dev_attr_hwtype.attr, + &dev_attr_raw_hwtype.attr, + &dev_attr_depth.attr, + &dev_attr_ap_functions.attr, + &dev_attr_request_count.attr, + &dev_attr_requestq_count.attr, + &dev_attr_pendingq_count.attr, + &dev_attr_modalias.attr, + NULL +}; + +static struct attribute_group ap_card_dev_attr_group = { + .attrs = ap_card_dev_attrs +}; + +static const struct attribute_group *ap_card_dev_attr_groups[] = { + &ap_card_dev_attr_group, + NULL +}; + +struct device_type ap_card_type = { + .name = "ap_card", + .groups = ap_card_dev_attr_groups, +}; + +static void ap_card_device_release(struct device *dev) +{ + kfree(to_ap_card(dev)); +} + +struct ap_card *ap_card_create(int id, int queue_depth, int device_type, + unsigned int functions) +{ + struct ap_card *ac; + + ac = kzalloc(sizeof(*ac), GFP_KERNEL); + if (!ac) + return NULL; + INIT_LIST_HEAD(&ac->queues); + ac->ap_dev.device.release = ap_card_device_release; + ac->ap_dev.device.type = &ap_card_type; + ac->ap_dev.device_type = device_type; + /* CEX6 toleration: map to CEX5 */ + if (device_type == AP_DEVICE_TYPE_CEX6) + ac->ap_dev.device_type = AP_DEVICE_TYPE_CEX5; + ac->raw_hwtype = device_type; + ac->queue_depth = queue_depth; + ac->functions = functions; + ac->id = id; + return ac; +} |