v4.19.13 snapshot.
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
new file mode 100644
index 0000000..f039266
--- /dev/null
+++ b/drivers/s390/crypto/ap_bus.c
@@ -0,0 +1,1625 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright IBM Corp. 2006, 2012
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Ralph Wuerthner <rwuerthn@de.ibm.com>
+ * Felix Beck <felix.beck@de.ibm.com>
+ * Holger Dengler <hd@linux.vnet.ibm.com>
+ *
+ * Adjunct processor bus.
+ */
+
+#define KMSG_COMPONENT "ap"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel_stat.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include <linux/notifier.h>
+#include <linux/kthread.h>
+#include <linux/mutex.h>
+#include <linux/suspend.h>
+#include <asm/airq.h>
+#include <linux/atomic.h>
+#include <asm/isc.h>
+#include <linux/hrtimer.h>
+#include <linux/ktime.h>
+#include <asm/facility.h>
+#include <linux/crypto.h>
+#include <linux/mod_devicetable.h>
+#include <linux/debugfs.h>
+#include <linux/ctype.h>
+
+#include "ap_bus.h"
+#include "ap_debug.h"
+
+/*
+ * Module parameters; note though this file itself isn't modular.
+ */
+int ap_domain_index = -1; /* Adjunct Processor Domain Index */
+static DEFINE_SPINLOCK(ap_domain_lock);
+module_param_named(domain, ap_domain_index, int, 0440);
+MODULE_PARM_DESC(domain, "domain index for ap devices");
+EXPORT_SYMBOL(ap_domain_index);
+
+static int ap_thread_flag;
+module_param_named(poll_thread, ap_thread_flag, int, 0440);
+MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off).");
+
+static char *apm_str;
+module_param_named(apmask, apm_str, charp, 0440);
+MODULE_PARM_DESC(apmask, "AP bus adapter mask.");
+
+static char *aqm_str;
+module_param_named(aqmask, aqm_str, charp, 0440);
+MODULE_PARM_DESC(aqmask, "AP bus domain mask.");
+
+static struct device *ap_root_device;
+
+DEFINE_SPINLOCK(ap_list_lock);
+LIST_HEAD(ap_card_list);
+
+/* Default permissions (card and domain masking) */
+static struct ap_perms {
+ DECLARE_BITMAP(apm, AP_DEVICES);
+ DECLARE_BITMAP(aqm, AP_DOMAINS);
+} ap_perms;
+static DEFINE_MUTEX(ap_perms_mutex);
+
+static struct ap_config_info *ap_configuration;
+static bool initialised;
+
+/*
+ * AP bus related debug feature things.
+ */
+debug_info_t *ap_dbf_info;
+
+/*
+ * Workqueue timer for bus rescan.
+ */
+static struct timer_list ap_config_timer;
+static int ap_config_time = AP_CONFIG_TIME;
+static void ap_scan_bus(struct work_struct *);
+static DECLARE_WORK(ap_scan_work, ap_scan_bus);
+
+/*
+ * Tasklet & timer for AP request polling and interrupts
+ */
+static void ap_tasklet_fn(unsigned long);
+static DECLARE_TASKLET(ap_tasklet, ap_tasklet_fn, 0);
+static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait);
+static struct task_struct *ap_poll_kthread;
+static DEFINE_MUTEX(ap_poll_thread_mutex);
+static DEFINE_SPINLOCK(ap_poll_timer_lock);
+static struct hrtimer ap_poll_timer;
+/*
+ * In LPAR poll with 4kHz frequency. Poll every 250000 nanoseconds.
+ * If z/VM change to 1500000 nanoseconds to adjust to z/VM polling.
+ */
+static unsigned long long poll_timeout = 250000;
+
+/* Suspend flag */
+static int ap_suspend_flag;
+/* Maximum domain id */
+static int ap_max_domain_id;
+/*
+ * Flag to check if domain was set through module parameter domain=. This is
+ * important when supsend and resume is done in a z/VM environment where the
+ * domain might change.
+ */
+static int user_set_domain;
+static struct bus_type ap_bus_type;
+
+/* Adapter interrupt definitions */
+static void ap_interrupt_handler(struct airq_struct *airq);
+
+static int ap_airq_flag;
+
+static struct airq_struct ap_airq = {
+ .handler = ap_interrupt_handler,
+ .isc = AP_ISC,
+};
+
+/**
+ * ap_using_interrupts() - Returns non-zero if interrupt support is
+ * available.
+ */
+static inline int ap_using_interrupts(void)
+{
+ return ap_airq_flag;
+}
+
+/**
+ * ap_airq_ptr() - Get the address of the adapter interrupt indicator
+ *
+ * Returns the address of the local-summary-indicator of the adapter
+ * interrupt handler for AP, or NULL if adapter interrupts are not
+ * available.
+ */
+void *ap_airq_ptr(void)
+{
+ if (ap_using_interrupts())
+ return ap_airq.lsi_ptr;
+ return NULL;
+}
+
+/**
+ * ap_interrupts_available(): Test if AP interrupts are available.
+ *
+ * Returns 1 if AP interrupts are available.
+ */
+static int ap_interrupts_available(void)
+{
+ return test_facility(65);
+}
+
+/**
+ * ap_configuration_available(): Test if AP configuration
+ * information is available.
+ *
+ * Returns 1 if AP configuration information is available.
+ */
+static int ap_configuration_available(void)
+{
+ return test_facility(12);
+}
+
+/**
+ * ap_apft_available(): Test if AP facilities test (APFT)
+ * facility is available.
+ *
+ * Returns 1 if APFT is is available.
+ */
+static int ap_apft_available(void)
+{
+ return test_facility(15);
+}
+
+/*
+ * ap_qact_available(): Test if the PQAP(QACT) subfunction is available.
+ *
+ * Returns 1 if the QACT subfunction is available.
+ */
+static inline int ap_qact_available(void)
+{
+ if (ap_configuration)
+ return ap_configuration->qact;
+ return 0;
+}
+
+/*
+ * ap_query_configuration(): Fetch cryptographic config info
+ *
+ * Returns the ap configuration info fetched via PQAP(QCI).
+ * On success 0 is returned, on failure a negative errno
+ * is returned, e.g. if the PQAP(QCI) instruction is not
+ * available, the return value will be -EOPNOTSUPP.
+ */
+static inline int ap_query_configuration(struct ap_config_info *info)
+{
+ if (!ap_configuration_available())
+ return -EOPNOTSUPP;
+ if (!info)
+ return -EINVAL;
+ return ap_qci(info);
+}
+EXPORT_SYMBOL(ap_query_configuration);
+
+/**
+ * ap_init_configuration(): Allocate and query configuration array.
+ */
+static void ap_init_configuration(void)
+{
+ if (!ap_configuration_available())
+ return;
+
+ ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL);
+ if (!ap_configuration)
+ return;
+ if (ap_query_configuration(ap_configuration) != 0) {
+ kfree(ap_configuration);
+ ap_configuration = NULL;
+ return;
+ }
+}
+
+/*
+ * ap_test_config(): helper function to extract the nrth bit
+ * within the unsigned int array field.
+ */
+static inline int ap_test_config(unsigned int *field, unsigned int nr)
+{
+ return ap_test_bit((field + (nr >> 5)), (nr & 0x1f));
+}
+
+/*
+ * ap_test_config_card_id(): Test, whether an AP card ID is configured.
+ * @id AP card ID
+ *
+ * Returns 0 if the card is not configured
+ * 1 if the card is configured or
+ * if the configuration information is not available
+ */
+static inline int ap_test_config_card_id(unsigned int id)
+{
+ if (!ap_configuration) /* QCI not supported */
+ return 1;
+ return ap_test_config(ap_configuration->apm, id);
+}
+
+/*
+ * ap_test_config_domain(): Test, whether an AP usage domain is configured.
+ * @domain AP usage domain ID
+ *
+ * Returns 0 if the usage domain is not configured
+ * 1 if the usage domain is configured or
+ * if the configuration information is not available
+ */
+static inline int ap_test_config_domain(unsigned int domain)
+{
+ if (!ap_configuration) /* QCI not supported */
+ return domain < 16;
+ return ap_test_config(ap_configuration->aqm, domain);
+}
+
+/**
+ * ap_query_queue(): Check if an AP queue is available.
+ * @qid: The AP queue number
+ * @queue_depth: Pointer to queue depth value
+ * @device_type: Pointer to device type value
+ * @facilities: Pointer to facility indicator
+ */
+static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type,
+ unsigned int *facilities)
+{
+ struct ap_queue_status status;
+ unsigned long info;
+ int nd;
+
+ if (!ap_test_config_card_id(AP_QID_CARD(qid)))
+ return -ENODEV;
+
+ status = ap_test_queue(qid, ap_apft_available(), &info);
+ switch (status.response_code) {
+ case AP_RESPONSE_NORMAL:
+ *queue_depth = (int)(info & 0xff);
+ *device_type = (int)((info >> 24) & 0xff);
+ *facilities = (unsigned int)(info >> 32);
+ /* Update maximum domain id */
+ nd = (info >> 16) & 0xff;
+ /* if N bit is available, z13 and newer */
+ if ((info & (1UL << 57)) && nd > 0)
+ ap_max_domain_id = nd;
+ else /* older machine types */
+ ap_max_domain_id = 15;
+ switch (*device_type) {
+ /* For CEX2 and CEX3 the available functions
+ * are not refrected by the facilities bits.
+ * Instead it is coded into the type. So here
+ * modify the function bits based on the type.
+ */
+ case AP_DEVICE_TYPE_CEX2A:
+ case AP_DEVICE_TYPE_CEX3A:
+ *facilities |= 0x08000000;
+ break;
+ case AP_DEVICE_TYPE_CEX2C:
+ case AP_DEVICE_TYPE_CEX3C:
+ *facilities |= 0x10000000;
+ break;
+ default:
+ break;
+ }
+ return 0;
+ case AP_RESPONSE_Q_NOT_AVAIL:
+ case AP_RESPONSE_DECONFIGURED:
+ case AP_RESPONSE_CHECKSTOPPED:
+ case AP_RESPONSE_INVALID_ADDRESS:
+ return -ENODEV;
+ case AP_RESPONSE_RESET_IN_PROGRESS:
+ case AP_RESPONSE_OTHERWISE_CHANGED:
+ case AP_RESPONSE_BUSY:
+ return -EBUSY;
+ default:
+ BUG();
+ }
+}
+
+void ap_wait(enum ap_wait wait)
+{
+ ktime_t hr_time;
+
+ switch (wait) {
+ case AP_WAIT_AGAIN:
+ case AP_WAIT_INTERRUPT:
+ if (ap_using_interrupts())
+ break;
+ if (ap_poll_kthread) {
+ wake_up(&ap_poll_wait);
+ break;
+ }
+ /* Fall through */
+ case AP_WAIT_TIMEOUT:
+ spin_lock_bh(&ap_poll_timer_lock);
+ if (!hrtimer_is_queued(&ap_poll_timer)) {
+ hr_time = poll_timeout;
+ hrtimer_forward_now(&ap_poll_timer, hr_time);
+ hrtimer_restart(&ap_poll_timer);
+ }
+ spin_unlock_bh(&ap_poll_timer_lock);
+ break;
+ case AP_WAIT_NONE:
+ default:
+ break;
+ }
+}
+
+/**
+ * ap_request_timeout(): Handling of request timeouts
+ * @t: timer making this callback
+ *
+ * Handles request timeouts.
+ */
+void ap_request_timeout(struct timer_list *t)
+{
+ struct ap_queue *aq = from_timer(aq, t, timeout);
+
+ if (ap_suspend_flag)
+ return;
+ spin_lock_bh(&aq->lock);
+ ap_wait(ap_sm_event(aq, AP_EVENT_TIMEOUT));
+ spin_unlock_bh(&aq->lock);
+}
+
+/**
+ * ap_poll_timeout(): AP receive polling for finished AP requests.
+ * @unused: Unused pointer.
+ *
+ * Schedules the AP tasklet using a high resolution timer.
+ */
+static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused)
+{
+ if (!ap_suspend_flag)
+ tasklet_schedule(&ap_tasklet);
+ return HRTIMER_NORESTART;
+}
+
+/**
+ * ap_interrupt_handler() - Schedule ap_tasklet on interrupt
+ * @airq: pointer to adapter interrupt descriptor
+ */
+static void ap_interrupt_handler(struct airq_struct *airq)
+{
+ inc_irq_stat(IRQIO_APB);
+ if (!ap_suspend_flag)
+ tasklet_schedule(&ap_tasklet);
+}
+
+/**
+ * ap_tasklet_fn(): Tasklet to poll all AP devices.
+ * @dummy: Unused variable
+ *
+ * Poll all AP devices on the bus.
+ */
+static void ap_tasklet_fn(unsigned long dummy)
+{
+ struct ap_card *ac;
+ struct ap_queue *aq;
+ enum ap_wait wait = AP_WAIT_NONE;
+
+ /* Reset the indicator if interrupts are used. Thus new interrupts can
+ * be received. Doing it in the beginning of the tasklet is therefor
+ * important that no requests on any AP get lost.
+ */
+ if (ap_using_interrupts())
+ xchg(ap_airq.lsi_ptr, 0);
+
+ spin_lock_bh(&ap_list_lock);
+ for_each_ap_card(ac) {
+ for_each_ap_queue(aq, ac) {
+ spin_lock_bh(&aq->lock);
+ wait = min(wait, ap_sm_event_loop(aq, AP_EVENT_POLL));
+ spin_unlock_bh(&aq->lock);
+ }
+ }
+ spin_unlock_bh(&ap_list_lock);
+
+ ap_wait(wait);
+}
+
+static int ap_pending_requests(void)
+{
+ struct ap_card *ac;
+ struct ap_queue *aq;
+
+ spin_lock_bh(&ap_list_lock);
+ for_each_ap_card(ac) {
+ for_each_ap_queue(aq, ac) {
+ if (aq->queue_count == 0)
+ continue;
+ spin_unlock_bh(&ap_list_lock);
+ return 1;
+ }
+ }
+ spin_unlock_bh(&ap_list_lock);
+ return 0;
+}
+
+/**
+ * ap_poll_thread(): Thread that polls for finished requests.
+ * @data: Unused pointer
+ *
+ * AP bus poll thread. The purpose of this thread is to poll for
+ * finished requests in a loop if there is a "free" cpu - that is
+ * a cpu that doesn't have anything better to do. The polling stops
+ * as soon as there is another task or if all messages have been
+ * delivered.
+ */
+static int ap_poll_thread(void *data)
+{
+ DECLARE_WAITQUEUE(wait, current);
+
+ set_user_nice(current, MAX_NICE);
+ set_freezable();
+ while (!kthread_should_stop()) {
+ add_wait_queue(&ap_poll_wait, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (ap_suspend_flag || !ap_pending_requests()) {
+ schedule();
+ try_to_freeze();
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&ap_poll_wait, &wait);
+ if (need_resched()) {
+ schedule();
+ try_to_freeze();
+ continue;
+ }
+ ap_tasklet_fn(0);
+ }
+
+ return 0;
+}
+
+static int ap_poll_thread_start(void)
+{
+ int rc;
+
+ if (ap_using_interrupts() || ap_poll_kthread)
+ return 0;
+ mutex_lock(&ap_poll_thread_mutex);
+ ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll");
+ rc = PTR_ERR_OR_ZERO(ap_poll_kthread);
+ if (rc)
+ ap_poll_kthread = NULL;
+ mutex_unlock(&ap_poll_thread_mutex);
+ return rc;
+}
+
+static void ap_poll_thread_stop(void)
+{
+ if (!ap_poll_kthread)
+ return;
+ mutex_lock(&ap_poll_thread_mutex);
+ kthread_stop(ap_poll_kthread);
+ ap_poll_kthread = NULL;
+ mutex_unlock(&ap_poll_thread_mutex);
+}
+
+#define is_card_dev(x) ((x)->parent == ap_root_device)
+#define is_queue_dev(x) ((x)->parent != ap_root_device)
+
+/**
+ * ap_bus_match()
+ * @dev: Pointer to device
+ * @drv: Pointer to device_driver
+ *
+ * AP bus driver registration/unregistration.
+ */
+static int ap_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct ap_driver *ap_drv = to_ap_drv(drv);
+ struct ap_device_id *id;
+
+ /*
+ * Compare device type of the device with the list of
+ * supported types of the device_driver.
+ */
+ for (id = ap_drv->ids; id->match_flags; id++) {
+ if (is_card_dev(dev) &&
+ id->match_flags & AP_DEVICE_ID_MATCH_CARD_TYPE &&
+ id->dev_type == to_ap_dev(dev)->device_type)
+ return 1;
+ if (is_queue_dev(dev) &&
+ id->match_flags & AP_DEVICE_ID_MATCH_QUEUE_TYPE &&
+ id->dev_type == to_ap_dev(dev)->device_type)
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * ap_uevent(): Uevent function for AP devices.
+ * @dev: Pointer to device
+ * @env: Pointer to kobj_uevent_env
+ *
+ * It sets up a single environment variable DEV_TYPE which contains the
+ * hardware device type.
+ */
+static int ap_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct ap_device *ap_dev = to_ap_dev(dev);
+ int retval = 0;
+
+ if (!ap_dev)
+ return -ENODEV;
+
+ /* Set up DEV_TYPE environment variable. */
+ retval = add_uevent_var(env, "DEV_TYPE=%04X", ap_dev->device_type);
+ if (retval)
+ return retval;
+
+ /* Add MODALIAS= */
+ retval = add_uevent_var(env, "MODALIAS=ap:t%02X", ap_dev->device_type);
+
+ return retval;
+}
+
+static int ap_dev_suspend(struct device *dev)
+{
+ struct ap_device *ap_dev = to_ap_dev(dev);
+
+ if (ap_dev->drv && ap_dev->drv->suspend)
+ ap_dev->drv->suspend(ap_dev);
+ return 0;
+}
+
+static int ap_dev_resume(struct device *dev)
+{
+ struct ap_device *ap_dev = to_ap_dev(dev);
+
+ if (ap_dev->drv && ap_dev->drv->resume)
+ ap_dev->drv->resume(ap_dev);
+ return 0;
+}
+
+static void ap_bus_suspend(void)
+{
+ AP_DBF(DBF_DEBUG, "%s running\n", __func__);
+
+ ap_suspend_flag = 1;
+ /*
+ * Disable scanning for devices, thus we do not want to scan
+ * for them after removing.
+ */
+ flush_work(&ap_scan_work);
+ tasklet_disable(&ap_tasklet);
+}
+
+static int __ap_card_devices_unregister(struct device *dev, void *dummy)
+{
+ if (is_card_dev(dev))
+ device_unregister(dev);
+ return 0;
+}
+
+static int __ap_queue_devices_unregister(struct device *dev, void *dummy)
+{
+ if (is_queue_dev(dev))
+ device_unregister(dev);
+ return 0;
+}
+
+static int __ap_queue_devices_with_id_unregister(struct device *dev, void *data)
+{
+ if (is_queue_dev(dev) &&
+ AP_QID_CARD(to_ap_queue(dev)->qid) == (int)(long) data)
+ device_unregister(dev);
+ return 0;
+}
+
+static void ap_bus_resume(void)
+{
+ int rc;
+
+ AP_DBF(DBF_DEBUG, "%s running\n", __func__);
+
+ /* remove all queue devices */
+ bus_for_each_dev(&ap_bus_type, NULL, NULL,
+ __ap_queue_devices_unregister);
+ /* remove all card devices */
+ bus_for_each_dev(&ap_bus_type, NULL, NULL,
+ __ap_card_devices_unregister);
+
+ /* Reset thin interrupt setting */
+ if (ap_interrupts_available() && !ap_using_interrupts()) {
+ rc = register_adapter_interrupt(&ap_airq);
+ ap_airq_flag = (rc == 0);
+ }
+ if (!ap_interrupts_available() && ap_using_interrupts()) {
+ unregister_adapter_interrupt(&ap_airq);
+ ap_airq_flag = 0;
+ }
+ /* Reset domain */
+ if (!user_set_domain)
+ ap_domain_index = -1;
+ /* Get things going again */
+ ap_suspend_flag = 0;
+ if (ap_airq_flag)
+ xchg(ap_airq.lsi_ptr, 0);
+ tasklet_enable(&ap_tasklet);
+ queue_work(system_long_wq, &ap_scan_work);
+}
+
+static int ap_power_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ switch (event) {
+ case PM_HIBERNATION_PREPARE:
+ case PM_SUSPEND_PREPARE:
+ ap_bus_suspend();
+ break;
+ case PM_POST_HIBERNATION:
+ case PM_POST_SUSPEND:
+ ap_bus_resume();
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
+}
+static struct notifier_block ap_power_notifier = {
+ .notifier_call = ap_power_event,
+};
+
+static SIMPLE_DEV_PM_OPS(ap_bus_pm_ops, ap_dev_suspend, ap_dev_resume);
+
+static struct bus_type ap_bus_type = {
+ .name = "ap",
+ .match = &ap_bus_match,
+ .uevent = &ap_uevent,
+ .pm = &ap_bus_pm_ops,
+};
+
+static int __ap_revise_reserved(struct device *dev, void *dummy)
+{
+ int rc, card, queue, devres, drvres;
+
+ if (is_queue_dev(dev)) {
+ card = AP_QID_CARD(to_ap_queue(dev)->qid);
+ queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
+ mutex_lock(&ap_perms_mutex);
+ devres = test_bit_inv(card, ap_perms.apm)
+ && test_bit_inv(queue, ap_perms.aqm);
+ mutex_unlock(&ap_perms_mutex);
+ drvres = to_ap_drv(dev->driver)->flags
+ & AP_DRIVER_FLAG_DEFAULT;
+ if (!!devres != !!drvres) {
+ AP_DBF(DBF_DEBUG, "reprobing queue=%02x.%04x\n",
+ card, queue);
+ rc = device_reprobe(dev);
+ }
+ }
+
+ return 0;
+}
+
+static void ap_bus_revise_bindings(void)
+{
+ bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_revise_reserved);
+}
+
+int ap_owned_by_def_drv(int card, int queue)
+{
+ int rc = 0;
+
+ if (card < 0 || card >= AP_DEVICES || queue < 0 || queue >= AP_DOMAINS)
+ return -EINVAL;
+
+ mutex_lock(&ap_perms_mutex);
+
+ if (test_bit_inv(card, ap_perms.apm)
+ && test_bit_inv(queue, ap_perms.aqm))
+ rc = 1;
+
+ mutex_unlock(&ap_perms_mutex);
+
+ return rc;
+}
+EXPORT_SYMBOL(ap_owned_by_def_drv);
+
+int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
+ unsigned long *aqm)
+{
+ int card, queue, rc = 0;
+
+ mutex_lock(&ap_perms_mutex);
+
+ for (card = 0; !rc && card < AP_DEVICES; card++)
+ if (test_bit_inv(card, apm) &&
+ test_bit_inv(card, ap_perms.apm))
+ for (queue = 0; !rc && queue < AP_DOMAINS; queue++)
+ if (test_bit_inv(queue, aqm) &&
+ test_bit_inv(queue, ap_perms.aqm))
+ rc = 1;
+
+ mutex_unlock(&ap_perms_mutex);
+
+ return rc;
+}
+EXPORT_SYMBOL(ap_apqn_in_matrix_owned_by_def_drv);
+
+static int ap_device_probe(struct device *dev)
+{
+ struct ap_device *ap_dev = to_ap_dev(dev);
+ struct ap_driver *ap_drv = to_ap_drv(dev->driver);
+ int card, queue, devres, drvres, rc;
+
+ if (is_queue_dev(dev)) {
+ /*
+ * If the apqn is marked as reserved/used by ap bus and
+ * default drivers, only probe with drivers with the default
+ * flag set. If it is not marked, only probe with drivers
+ * with the default flag not set.
+ */
+ card = AP_QID_CARD(to_ap_queue(dev)->qid);
+ queue = AP_QID_QUEUE(to_ap_queue(dev)->qid);
+ mutex_lock(&ap_perms_mutex);
+ devres = test_bit_inv(card, ap_perms.apm)
+ && test_bit_inv(queue, ap_perms.aqm);
+ mutex_unlock(&ap_perms_mutex);
+ drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT;
+ if (!!devres != !!drvres)
+ return -ENODEV;
+ }
+
+ /* Add queue/card to list of active queues/cards */
+ spin_lock_bh(&ap_list_lock);
+ if (is_card_dev(dev))
+ list_add(&to_ap_card(dev)->list, &ap_card_list);
+ else
+ list_add(&to_ap_queue(dev)->list,
+ &to_ap_queue(dev)->card->queues);
+ spin_unlock_bh(&ap_list_lock);
+
+ ap_dev->drv = ap_drv;
+ rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
+
+ if (rc) {
+ spin_lock_bh(&ap_list_lock);
+ if (is_card_dev(dev))
+ list_del_init(&to_ap_card(dev)->list);
+ else
+ list_del_init(&to_ap_queue(dev)->list);
+ spin_unlock_bh(&ap_list_lock);
+ ap_dev->drv = NULL;
+ }
+
+ return rc;
+}
+
+static int ap_device_remove(struct device *dev)
+{
+ struct ap_device *ap_dev = to_ap_dev(dev);
+ struct ap_driver *ap_drv = ap_dev->drv;
+
+ if (ap_drv->remove)
+ ap_drv->remove(ap_dev);
+
+ /* Remove queue/card from list of active queues/cards */
+ spin_lock_bh(&ap_list_lock);
+ if (is_card_dev(dev))
+ list_del_init(&to_ap_card(dev)->list);
+ else
+ list_del_init(&to_ap_queue(dev)->list);
+ spin_unlock_bh(&ap_list_lock);
+
+ return 0;
+}
+
+int ap_driver_register(struct ap_driver *ap_drv, struct module *owner,
+ char *name)
+{
+ struct device_driver *drv = &ap_drv->driver;
+
+ if (!initialised)
+ return -ENODEV;
+
+ drv->bus = &ap_bus_type;
+ drv->probe = ap_device_probe;
+ drv->remove = ap_device_remove;
+ drv->owner = owner;
+ drv->name = name;
+ return driver_register(drv);
+}
+EXPORT_SYMBOL(ap_driver_register);
+
+void ap_driver_unregister(struct ap_driver *ap_drv)
+{
+ driver_unregister(&ap_drv->driver);
+}
+EXPORT_SYMBOL(ap_driver_unregister);
+
+void ap_bus_force_rescan(void)
+{
+ if (ap_suspend_flag)
+ return;
+ /* processing a asynchronous bus rescan */
+ del_timer(&ap_config_timer);
+ queue_work(system_long_wq, &ap_scan_work);
+ flush_work(&ap_scan_work);
+}
+EXPORT_SYMBOL(ap_bus_force_rescan);
+
+/*
+ * hex2bitmap() - parse hex mask string and set bitmap.
+ * Valid strings are "0x012345678" with at least one valid hex number.
+ * Rest of the bitmap to the right is padded with 0. No spaces allowed
+ * within the string, the leading 0x may be omitted.
+ * Returns the bitmask with exactly the bits set as given by the hex
+ * string (both in big endian order).
+ */
+static int hex2bitmap(const char *str, unsigned long *bitmap, int bits)
+{
+ int i, n, b;
+
+ /* bits needs to be a multiple of 8 */
+ if (bits & 0x07)
+ return -EINVAL;
+
+ if (str[0] == '0' && str[1] == 'x')
+ str++;
+ if (*str == 'x')
+ str++;
+
+ for (i = 0; isxdigit(*str) && i < bits; str++) {
+ b = hex_to_bin(*str);
+ for (n = 0; n < 4; n++)
+ if (b & (0x08 >> n))
+ set_bit_inv(i + n, bitmap);
+ i += 4;
+ }
+
+ if (*str == '\n')
+ str++;
+ if (*str)
+ return -EINVAL;
+ return 0;
+}
+
+/*
+ * modify_bitmap() - parse bitmask argument and modify an existing
+ * bit mask accordingly. A concatenation (done with ',') of these
+ * terms is recognized:
+ * +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>]
+ * <bitnr> may be any valid number (hex, decimal or octal) in the range
+ * 0...bits-1; the leading + or - is required. Here are some examples:
+ * +0-15,+32,-128,-0xFF
+ * -0-255,+1-16,+0x128
+ * +1,+2,+3,+4,-5,-7-10
+ * Returns the new bitmap after all changes have been applied. Every
+ * positive value in the string will set a bit and every negative value
+ * in the string will clear a bit. As a bit may be touched more than once,
+ * the last 'operation' wins:
+ * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be
+ * cleared again. All other bits are unmodified.
+ */
+static int modify_bitmap(const char *str, unsigned long *bitmap, int bits)
+{
+ int a, i, z;
+ char *np, sign;
+
+ /* bits needs to be a multiple of 8 */
+ if (bits & 0x07)
+ return -EINVAL;
+
+ while (*str) {
+ sign = *str++;
+ if (sign != '+' && sign != '-')
+ return -EINVAL;
+ a = z = simple_strtoul(str, &np, 0);
+ if (str == np || a >= bits)
+ return -EINVAL;
+ str = np;
+ if (*str == '-') {
+ z = simple_strtoul(++str, &np, 0);
+ if (str == np || a > z || z >= bits)
+ return -EINVAL;
+ str = np;
+ }
+ for (i = a; i <= z; i++)
+ if (sign == '+')
+ set_bit_inv(i, bitmap);
+ else
+ clear_bit_inv(i, bitmap);
+ while (*str == ',' || *str == '\n')
+ str++;
+ }
+
+ return 0;
+}
+
+/*
+ * process_mask_arg() - parse a bitmap string and clear/set the
+ * bits in the bitmap accordingly. The string may be given as
+ * absolute value, a hex string like 0x1F2E3D4C5B6A" simple over-
+ * writing the current content of the bitmap. Or as relative string
+ * like "+1-16,-32,-0x40,+128" where only single bits or ranges of
+ * bits are cleared or set. Distinction is done based on the very
+ * first character which may be '+' or '-' for the relative string
+ * and othewise assume to be an absolute value string. If parsing fails
+ * a negative errno value is returned. All arguments and bitmaps are
+ * big endian order.
+ */
+static int process_mask_arg(const char *str,
+ unsigned long *bitmap, int bits,
+ struct mutex *lock)
+{
+ unsigned long *newmap, size;
+ int rc;
+
+ /* bits needs to be a multiple of 8 */
+ if (bits & 0x07)
+ return -EINVAL;
+
+ size = BITS_TO_LONGS(bits)*sizeof(unsigned long);
+ newmap = kmalloc(size, GFP_KERNEL);
+ if (!newmap)
+ return -ENOMEM;
+ if (mutex_lock_interruptible(lock)) {
+ kfree(newmap);
+ return -ERESTARTSYS;
+ }
+
+ if (*str == '+' || *str == '-') {
+ memcpy(newmap, bitmap, size);
+ rc = modify_bitmap(str, newmap, bits);
+ } else {
+ memset(newmap, 0, size);
+ rc = hex2bitmap(str, newmap, bits);
+ }
+ if (rc == 0)
+ memcpy(bitmap, newmap, size);
+ mutex_unlock(lock);
+ kfree(newmap);
+ return rc;
+}
+
+/*
+ * AP bus attributes.
+ */
+
+static ssize_t ap_domain_show(struct bus_type *bus, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
+}
+
+static ssize_t ap_domain_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ int domain;
+
+ if (sscanf(buf, "%i\n", &domain) != 1 ||
+ domain < 0 || domain > ap_max_domain_id ||
+ !test_bit_inv(domain, ap_perms.aqm))
+ return -EINVAL;
+ spin_lock_bh(&ap_domain_lock);
+ ap_domain_index = domain;
+ spin_unlock_bh(&ap_domain_lock);
+
+ AP_DBF(DBF_DEBUG, "stored new default domain=%d\n", domain);
+
+ return count;
+}
+
+static BUS_ATTR_RW(ap_domain);
+
+static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
+{
+ if (!ap_configuration) /* QCI not supported */
+ return snprintf(buf, PAGE_SIZE, "not supported\n");
+
+ return snprintf(buf, PAGE_SIZE,
+ "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ ap_configuration->adm[0], ap_configuration->adm[1],
+ ap_configuration->adm[2], ap_configuration->adm[3],
+ ap_configuration->adm[4], ap_configuration->adm[5],
+ ap_configuration->adm[6], ap_configuration->adm[7]);
+}
+
+static BUS_ATTR_RO(ap_control_domain_mask);
+
+static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
+{
+ if (!ap_configuration) /* QCI not supported */
+ return snprintf(buf, PAGE_SIZE, "not supported\n");
+
+ return snprintf(buf, PAGE_SIZE,
+ "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ ap_configuration->aqm[0], ap_configuration->aqm[1],
+ ap_configuration->aqm[2], ap_configuration->aqm[3],
+ ap_configuration->aqm[4], ap_configuration->aqm[5],
+ ap_configuration->aqm[6], ap_configuration->aqm[7]);
+}
+
+static BUS_ATTR_RO(ap_usage_domain_mask);
+
+static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ ap_using_interrupts() ? 1 : 0);
+}
+
+static BUS_ATTR_RO(ap_interrupts);
+
+static ssize_t config_time_show(struct bus_type *bus, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
+}
+
+static ssize_t config_time_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ int time;
+
+ if (sscanf(buf, "%d\n", &time) != 1 || time < 5 || time > 120)
+ return -EINVAL;
+ ap_config_time = time;
+ mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
+ return count;
+}
+
+static BUS_ATTR_RW(config_time);
+
+static ssize_t poll_thread_show(struct bus_type *bus, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
+}
+
+static ssize_t poll_thread_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ int flag, rc;
+
+ if (sscanf(buf, "%d\n", &flag) != 1)
+ return -EINVAL;
+ if (flag) {
+ rc = ap_poll_thread_start();
+ if (rc)
+ count = rc;
+ } else
+ ap_poll_thread_stop();
+ return count;
+}
+
+static BUS_ATTR_RW(poll_thread);
+
+static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
+}
+
+static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
+ size_t count)
+{
+ unsigned long long time;
+ ktime_t hr_time;
+
+ /* 120 seconds = maximum poll interval */
+ if (sscanf(buf, "%llu\n", &time) != 1 || time < 1 ||
+ time > 120000000000ULL)
+ return -EINVAL;
+ poll_timeout = time;
+ hr_time = poll_timeout;
+
+ spin_lock_bh(&ap_poll_timer_lock);
+ hrtimer_cancel(&ap_poll_timer);
+ hrtimer_set_expires(&ap_poll_timer, hr_time);
+ hrtimer_start_expires(&ap_poll_timer, HRTIMER_MODE_ABS);
+ spin_unlock_bh(&ap_poll_timer_lock);
+
+ return count;
+}
+
+static BUS_ATTR_RW(poll_timeout);
+
+static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
+{
+ int max_domain_id;
+
+ if (ap_configuration)
+ max_domain_id = ap_max_domain_id ? : -1;
+ else
+ max_domain_id = 15;
+ return snprintf(buf, PAGE_SIZE, "%d\n", max_domain_id);
+}
+
+static BUS_ATTR_RO(ap_max_domain_id);
+
+static ssize_t apmask_show(struct bus_type *bus, char *buf)
+{
+ int rc;
+
+ if (mutex_lock_interruptible(&ap_perms_mutex))
+ return -ERESTARTSYS;
+ rc = snprintf(buf, PAGE_SIZE,
+ "0x%016lx%016lx%016lx%016lx\n",
+ ap_perms.apm[0], ap_perms.apm[1],
+ ap_perms.apm[2], ap_perms.apm[3]);
+ mutex_unlock(&ap_perms_mutex);
+
+ return rc;
+}
+
+static ssize_t apmask_store(struct bus_type *bus, const char *buf,
+ size_t count)
+{
+ int rc;
+
+ rc = process_mask_arg(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex);
+ if (rc)
+ return rc;
+
+ ap_bus_revise_bindings();
+
+ return count;
+}
+
+static BUS_ATTR_RW(apmask);
+
+static ssize_t aqmask_show(struct bus_type *bus, char *buf)
+{
+ int rc;
+
+ if (mutex_lock_interruptible(&ap_perms_mutex))
+ return -ERESTARTSYS;
+ rc = snprintf(buf, PAGE_SIZE,
+ "0x%016lx%016lx%016lx%016lx\n",
+ ap_perms.aqm[0], ap_perms.aqm[1],
+ ap_perms.aqm[2], ap_perms.aqm[3]);
+ mutex_unlock(&ap_perms_mutex);
+
+ return rc;
+}
+
+static ssize_t aqmask_store(struct bus_type *bus, const char *buf,
+ size_t count)
+{
+ int rc;
+
+ rc = process_mask_arg(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex);
+ if (rc)
+ return rc;
+
+ ap_bus_revise_bindings();
+
+ return count;
+}
+
+static BUS_ATTR_RW(aqmask);
+
+static struct bus_attribute *const ap_bus_attrs[] = {
+ &bus_attr_ap_domain,
+ &bus_attr_ap_control_domain_mask,
+ &bus_attr_ap_usage_domain_mask,
+ &bus_attr_config_time,
+ &bus_attr_poll_thread,
+ &bus_attr_ap_interrupts,
+ &bus_attr_poll_timeout,
+ &bus_attr_ap_max_domain_id,
+ &bus_attr_apmask,
+ &bus_attr_aqmask,
+ NULL,
+};
+
+/**
+ * ap_select_domain(): Select an AP domain.
+ *
+ * Pick one of the 16 AP domains.
+ */
+static int ap_select_domain(void)
+{
+ int count, max_count, best_domain;
+ struct ap_queue_status status;
+ int i, j;
+
+ /*
+ * We want to use a single domain. Either the one specified with
+ * the "domain=" parameter or the domain with the maximum number
+ * of devices.
+ */
+ spin_lock_bh(&ap_domain_lock);
+ if (ap_domain_index >= 0) {
+ /* Domain has already been selected. */
+ spin_unlock_bh(&ap_domain_lock);
+ return 0;
+ }
+ best_domain = -1;
+ max_count = 0;
+ for (i = 0; i < AP_DOMAINS; i++) {
+ if (!ap_test_config_domain(i) ||
+ !test_bit_inv(i, ap_perms.aqm))
+ continue;
+ count = 0;
+ for (j = 0; j < AP_DEVICES; j++) {
+ if (!ap_test_config_card_id(j))
+ continue;
+ status = ap_test_queue(AP_MKQID(j, i),
+ ap_apft_available(),
+ NULL);
+ if (status.response_code != AP_RESPONSE_NORMAL)
+ continue;
+ count++;
+ }
+ if (count > max_count) {
+ max_count = count;
+ best_domain = i;
+ }
+ }
+ if (best_domain >= 0) {
+ ap_domain_index = best_domain;
+ AP_DBF(DBF_DEBUG, "new ap_domain_index=%d\n", ap_domain_index);
+ spin_unlock_bh(&ap_domain_lock);
+ return 0;
+ }
+ spin_unlock_bh(&ap_domain_lock);
+ return -ENODEV;
+}
+
+/*
+ * This function checks the type and returns either 0 for not
+ * supported or the highest compatible type value (which may
+ * include the input type value).
+ */
+static int ap_get_compatible_type(ap_qid_t qid, int rawtype, unsigned int func)
+{
+ int comp_type = 0;
+
+ /* < CEX2A is not supported */
+ if (rawtype < AP_DEVICE_TYPE_CEX2A)
+ return 0;
+ /* up to CEX6 known and fully supported */
+ if (rawtype <= AP_DEVICE_TYPE_CEX6)
+ return rawtype;
+ /*
+ * unknown new type > CEX6, check for compatibility
+ * to the highest known and supported type which is
+ * currently CEX6 with the help of the QACT function.
+ */
+ if (ap_qact_available()) {
+ struct ap_queue_status status;
+ union ap_qact_ap_info apinfo = {0};
+
+ apinfo.mode = (func >> 26) & 0x07;
+ apinfo.cat = AP_DEVICE_TYPE_CEX6;
+ status = ap_qact(qid, 0, &apinfo);
+ if (status.response_code == AP_RESPONSE_NORMAL
+ && apinfo.cat >= AP_DEVICE_TYPE_CEX2A
+ && apinfo.cat <= AP_DEVICE_TYPE_CEX6)
+ comp_type = apinfo.cat;
+ }
+ if (!comp_type)
+ AP_DBF(DBF_WARN, "queue=%02x.%04x unable to map type %d\n",
+ AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype);
+ else if (comp_type != rawtype)
+ AP_DBF(DBF_INFO, "queue=%02x.%04x map type %d to %d\n",
+ AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype, comp_type);
+ return comp_type;
+}
+
+/*
+ * helper function to be used with bus_find_dev
+ * matches for the card device with the given id
+ */
+static int __match_card_device_with_id(struct device *dev, void *data)
+{
+ return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long) data;
+}
+
+/* helper function to be used with bus_find_dev
+ * matches for the queue device with a given qid
+ */
+static int __match_queue_device_with_qid(struct device *dev, void *data)
+{
+ return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data;
+}
+
+/**
+ * ap_scan_bus(): Scan the AP bus for new devices
+ * Runs periodically, workqueue timer (ap_config_time)
+ */
+static void ap_scan_bus(struct work_struct *unused)
+{
+ struct ap_queue *aq;
+ struct ap_card *ac;
+ struct device *dev;
+ ap_qid_t qid;
+ int comp_type, depth = 0, type = 0;
+ unsigned int func = 0;
+ int rc, id, dom, borked, domains, defdomdevs = 0;
+
+ AP_DBF(DBF_DEBUG, "%s running\n", __func__);
+
+ ap_query_configuration(ap_configuration);
+ if (ap_select_domain() != 0)
+ goto out;
+
+ for (id = 0; id < AP_DEVICES; id++) {
+ /* check if device is registered */
+ dev = bus_find_device(&ap_bus_type, NULL,
+ (void *)(long) id,
+ __match_card_device_with_id);
+ ac = dev ? to_ap_card(dev) : NULL;
+ if (!ap_test_config_card_id(id)) {
+ if (dev) {
+ /* Card device has been removed from
+ * configuration, remove the belonging
+ * queue devices.
+ */
+ bus_for_each_dev(&ap_bus_type, NULL,
+ (void *)(long) id,
+ __ap_queue_devices_with_id_unregister);
+ /* now remove the card device */
+ device_unregister(dev);
+ put_device(dev);
+ }
+ continue;
+ }
+ /* According to the configuration there should be a card
+ * device, so check if there is at least one valid queue
+ * and maybe create queue devices and the card device.
+ */
+ domains = 0;
+ for (dom = 0; dom < AP_DOMAINS; dom++) {
+ qid = AP_MKQID(id, dom);
+ dev = bus_find_device(&ap_bus_type, NULL,
+ (void *)(long) qid,
+ __match_queue_device_with_qid);
+ aq = dev ? to_ap_queue(dev) : NULL;
+ if (!ap_test_config_domain(dom)) {
+ if (dev) {
+ /* Queue device exists but has been
+ * removed from configuration.
+ */
+ device_unregister(dev);
+ put_device(dev);
+ }
+ continue;
+ }
+ rc = ap_query_queue(qid, &depth, &type, &func);
+ if (dev) {
+ spin_lock_bh(&aq->lock);
+ if (rc == -ENODEV ||
+ /* adapter reconfiguration */
+ (ac && ac->functions != func))
+ aq->state = AP_STATE_BORKED;
+ borked = aq->state == AP_STATE_BORKED;
+ spin_unlock_bh(&aq->lock);
+ if (borked) /* Remove broken device */
+ device_unregister(dev);
+ put_device(dev);
+ if (!borked) {
+ domains++;
+ if (dom == ap_domain_index)
+ defdomdevs++;
+ continue;
+ }
+ }
+ if (rc)
+ continue;
+ /* a new queue device is needed, check out comp type */
+ comp_type = ap_get_compatible_type(qid, type, func);
+ if (!comp_type)
+ continue;
+ /* maybe a card device needs to be created first */
+ if (!ac) {
+ ac = ap_card_create(id, depth, type,
+ comp_type, func);
+ if (!ac)
+ continue;
+ ac->ap_dev.device.bus = &ap_bus_type;
+ ac->ap_dev.device.parent = ap_root_device;
+ dev_set_name(&ac->ap_dev.device,
+ "card%02x", id);
+ /* Register card with AP bus */
+ rc = device_register(&ac->ap_dev.device);
+ if (rc) {
+ put_device(&ac->ap_dev.device);
+ ac = NULL;
+ break;
+ }
+ /* get it and thus adjust reference counter */
+ get_device(&ac->ap_dev.device);
+ }
+ /* now create the new queue device */
+ aq = ap_queue_create(qid, comp_type);
+ if (!aq)
+ continue;
+ aq->card = ac;
+ aq->ap_dev.device.bus = &ap_bus_type;
+ aq->ap_dev.device.parent = &ac->ap_dev.device;
+ dev_set_name(&aq->ap_dev.device,
+ "%02x.%04x", id, dom);
+ /* Start with a device reset */
+ spin_lock_bh(&aq->lock);
+ ap_wait(ap_sm_event(aq, AP_EVENT_POLL));
+ spin_unlock_bh(&aq->lock);
+ /* Register device */
+ rc = device_register(&aq->ap_dev.device);
+ if (rc) {
+ put_device(&aq->ap_dev.device);
+ continue;
+ }
+ domains++;
+ if (dom == ap_domain_index)
+ defdomdevs++;
+ } /* end domain loop */
+ if (ac) {
+ /* remove card dev if there are no queue devices */
+ if (!domains)
+ device_unregister(&ac->ap_dev.device);
+ put_device(&ac->ap_dev.device);
+ }
+ } /* end device loop */
+
+ if (defdomdevs < 1)
+ AP_DBF(DBF_INFO,
+ "no queue device with default domain %d available\n",
+ ap_domain_index);
+
+out:
+ mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
+}
+
+static void ap_config_timeout(struct timer_list *unused)
+{
+ if (ap_suspend_flag)
+ return;
+ queue_work(system_long_wq, &ap_scan_work);
+}
+
+static int __init ap_debug_init(void)
+{
+ ap_dbf_info = debug_register("ap", 1, 1,
+ DBF_MAX_SPRINTF_ARGS * sizeof(long));
+ debug_register_view(ap_dbf_info, &debug_sprintf_view);
+ debug_set_level(ap_dbf_info, DBF_ERR);
+
+ return 0;
+}
+
+static void __init ap_perms_init(void)
+{
+ /* all resources useable if no kernel parameter string given */
+ memset(&ap_perms.apm, 0xFF, sizeof(ap_perms.apm));
+ memset(&ap_perms.aqm, 0xFF, sizeof(ap_perms.aqm));
+
+ /* apm kernel parameter string */
+ if (apm_str) {
+ memset(&ap_perms.apm, 0, sizeof(ap_perms.apm));
+ process_mask_arg(apm_str, ap_perms.apm, AP_DEVICES,
+ &ap_perms_mutex);
+ }
+
+ /* aqm kernel parameter string */
+ if (aqm_str) {
+ memset(&ap_perms.aqm, 0, sizeof(ap_perms.aqm));
+ process_mask_arg(aqm_str, ap_perms.aqm, AP_DOMAINS,
+ &ap_perms_mutex);
+ }
+}
+
+/**
+ * ap_module_init(): The module initialization code.
+ *
+ * Initializes the module.
+ */
+static int __init ap_module_init(void)
+{
+ int max_domain_id;
+ int rc, i;
+
+ rc = ap_debug_init();
+ if (rc)
+ return rc;
+
+ if (!ap_instructions_available()) {
+ pr_warn("The hardware system does not support AP instructions\n");
+ return -ENODEV;
+ }
+
+ /* set up the AP permissions (ap and aq masks) */
+ ap_perms_init();
+
+ /* Get AP configuration data if available */
+ ap_init_configuration();
+
+ if (ap_configuration)
+ max_domain_id =
+ ap_max_domain_id ? ap_max_domain_id : AP_DOMAINS - 1;
+ else
+ max_domain_id = 15;
+ if (ap_domain_index < -1 || ap_domain_index > max_domain_id ||
+ (ap_domain_index >= 0 &&
+ !test_bit_inv(ap_domain_index, ap_perms.aqm))) {
+ pr_warn("%d is not a valid cryptographic domain\n",
+ ap_domain_index);
+ ap_domain_index = -1;
+ }
+ /* In resume callback we need to know if the user had set the domain.
+ * If so, we can not just reset it.
+ */
+ if (ap_domain_index >= 0)
+ user_set_domain = 1;
+
+ if (ap_interrupts_available()) {
+ rc = register_adapter_interrupt(&ap_airq);
+ ap_airq_flag = (rc == 0);
+ }
+
+ /* Create /sys/bus/ap. */
+ rc = bus_register(&ap_bus_type);
+ if (rc)
+ goto out;
+ for (i = 0; ap_bus_attrs[i]; i++) {
+ rc = bus_create_file(&ap_bus_type, ap_bus_attrs[i]);
+ if (rc)
+ goto out_bus;
+ }
+
+ /* Create /sys/devices/ap. */
+ ap_root_device = root_device_register("ap");
+ rc = PTR_ERR_OR_ZERO(ap_root_device);
+ if (rc)
+ goto out_bus;
+
+ /* Setup the AP bus rescan timer. */
+ timer_setup(&ap_config_timer, ap_config_timeout, 0);
+
+ /*
+ * Setup the high resultion poll timer.
+ * If we are running under z/VM adjust polling to z/VM polling rate.
+ */
+ if (MACHINE_IS_VM)
+ poll_timeout = 1500000;
+ spin_lock_init(&ap_poll_timer_lock);
+ hrtimer_init(&ap_poll_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ ap_poll_timer.function = ap_poll_timeout;
+
+ /* Start the low priority AP bus poll thread. */
+ if (ap_thread_flag) {
+ rc = ap_poll_thread_start();
+ if (rc)
+ goto out_work;
+ }
+
+ rc = register_pm_notifier(&ap_power_notifier);
+ if (rc)
+ goto out_pm;
+
+ queue_work(system_long_wq, &ap_scan_work);
+ initialised = true;
+
+ return 0;
+
+out_pm:
+ ap_poll_thread_stop();
+out_work:
+ hrtimer_cancel(&ap_poll_timer);
+ root_device_unregister(ap_root_device);
+out_bus:
+ while (i--)
+ bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
+ bus_unregister(&ap_bus_type);
+out:
+ if (ap_using_interrupts())
+ unregister_adapter_interrupt(&ap_airq);
+ kfree(ap_configuration);
+ return rc;
+}
+device_initcall(ap_module_init);