From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/s390/crypto/ap_bus.c | 1174 ++++++++++++++++++++++++++++++++--------------------------
1 files changed, 645 insertions(+), 529 deletions(-)
diff --git a/kernel/drivers/s390/crypto/ap_bus.c b/kernel/drivers/s390/crypto/ap_bus.c
index 027a53e..c00a288 100644
--- a/kernel/drivers/s390/crypto/ap_bus.c
+++ b/kernel/drivers/s390/crypto/ap_bus.c
@@ -18,13 +18,13 @@
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/err.h>
+#include <linux/freezer.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>
@@ -62,18 +62,18 @@
static struct device *ap_root_device;
-DEFINE_SPINLOCK(ap_list_lock);
-LIST_HEAD(ap_card_list);
+/* Hashtable of all queue devices on the AP bus */
+DEFINE_HASHTABLE(ap_queues, 8);
+/* lock used for the ap_queues hashtable */
+DEFINE_SPINLOCK(ap_queues_lock);
-/* 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);
+/* Default permissions (ioctl, card and domain masking) */
+struct ap_perms ap_perms;
+EXPORT_SYMBOL(ap_perms);
+DEFINE_MUTEX(ap_perms_mutex);
+EXPORT_SYMBOL(ap_perms_mutex);
-static struct ap_config_info *ap_configuration;
-static bool initialised;
+static struct ap_config_info *ap_qci_info;
/*
* AP bus related debug feature things.
@@ -92,7 +92,7 @@
* 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_TASKLET_OLD(ap_tasklet, ap_tasklet_fn);
static DECLARE_WAIT_QUEUE_HEAD(ap_poll_wait);
static struct task_struct *ap_poll_kthread;
static DEFINE_MUTEX(ap_poll_thread_mutex);
@@ -104,36 +104,22 @@
*/
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;
+/* Maximum domain id, if not given via qci */
+static int ap_max_domain_id = 15;
+/* Maximum adapter id, if not given via qci */
+static int ap_max_adapter_id = 63;
+
static struct bus_type ap_bus_type;
/* Adapter interrupt definitions */
-static void ap_interrupt_handler(struct airq_struct *airq);
+static void ap_interrupt_handler(struct airq_struct *airq, bool floating);
-static int ap_airq_flag;
+static bool ap_irq_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
@@ -144,7 +130,7 @@
*/
void *ap_airq_ptr(void)
{
- if (ap_using_interrupts())
+ if (ap_irq_flag)
return ap_airq.lsi_ptr;
return NULL;
}
@@ -160,12 +146,12 @@
}
/**
- * ap_configuration_available(): Test if AP configuration
- * information is available.
+ * ap_qci_available(): Test if AP configuration
+ * information can be queried via QCI subfunction.
*
- * Returns 1 if AP configuration information is available.
+ * Returns 1 if subfunction PQAP(QCI) is available.
*/
-static int ap_configuration_available(void)
+static int ap_qci_available(void)
{
return test_facility(12);
}
@@ -188,44 +174,62 @@
*/
static inline int ap_qact_available(void)
{
- if (ap_configuration)
- return ap_configuration->qact;
+ if (ap_qci_info)
+ return ap_qci_info->qact;
return 0;
}
/*
- * ap_query_configuration(): Fetch cryptographic config info
+ * ap_fetch_qci_info(): 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)
+static inline int ap_fetch_qci_info(struct ap_config_info *info)
{
- if (!ap_configuration_available())
+ if (!ap_qci_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_init_qci_info(): Allocate and query qci config info.
+ * Does also update the static variables ap_max_domain_id
+ * and ap_max_adapter_id if this info is available.
- ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL);
- if (!ap_configuration)
+ */
+static void __init ap_init_qci_info(void)
+{
+ if (!ap_qci_available()) {
+ AP_DBF_INFO("%s QCI not supported\n", __func__);
return;
- if (ap_query_configuration(ap_configuration) != 0) {
- kfree(ap_configuration);
- ap_configuration = NULL;
+ }
+
+ ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL);
+ if (!ap_qci_info)
return;
+ if (ap_fetch_qci_info(ap_qci_info) != 0) {
+ kfree(ap_qci_info);
+ ap_qci_info = NULL;
+ return;
+ }
+ AP_DBF_INFO("%s successful fetched initial qci info\n", __func__);
+
+ if (ap_qci_info->apxa) {
+ if (ap_qci_info->Na) {
+ ap_max_adapter_id = ap_qci_info->Na;
+ AP_DBF_INFO("%s new ap_max_adapter_id is %d\n",
+ __func__, ap_max_adapter_id);
+ }
+ if (ap_qci_info->Nd) {
+ ap_max_domain_id = ap_qci_info->Nd;
+ AP_DBF_INFO("%s new ap_max_domain_id is %d\n",
+ __func__, ap_max_domain_id);
+ }
}
}
@@ -240,7 +244,6 @@
/*
* 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
@@ -248,104 +251,123 @@
*/
static inline int ap_test_config_card_id(unsigned int id)
{
- if (!ap_configuration) /* QCI not supported */
- /* only ids 0...3F may be probed */
- return id < 0x40 ? 1 : 0;
- return ap_test_config(ap_configuration->apm, id);
+ if (id > ap_max_adapter_id)
+ return 0;
+ if (ap_qci_info)
+ return ap_test_config(ap_qci_info->apm, id);
+ return 1;
}
/*
- * ap_test_config_domain(): Test, whether an AP usage domain is configured.
- * @domain AP usage domain ID
+ * ap_test_config_usage_domain(): Test, whether an AP usage domain
+ * is configured.
*
* 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)
+int ap_test_config_usage_domain(unsigned int domain)
{
- if (!ap_configuration) /* QCI not supported */
- return domain < 16;
- return ap_test_config(ap_configuration->aqm, domain);
+ if (domain > ap_max_domain_id)
+ return 0;
+ if (ap_qci_info)
+ return ap_test_config(ap_qci_info->aqm, domain);
+ return 1;
}
+EXPORT_SYMBOL(ap_test_config_usage_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
+/*
+ * ap_test_config_ctrl_domain(): Test, whether an AP control domain
+ * is configured.
+ * @domain AP control domain ID
+ *
+ * Returns 1 if the control domain is configured
+ * 0 in all other cases
*/
-static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type,
- unsigned int *facilities)
+int ap_test_config_ctrl_domain(unsigned int domain)
+{
+ if (!ap_qci_info || domain > ap_max_domain_id)
+ return 0;
+ return ap_test_config(ap_qci_info->adm, domain);
+}
+EXPORT_SYMBOL(ap_test_config_ctrl_domain);
+
+/*
+ * ap_queue_info(): Check and get AP queue info.
+ * Returns true if TAPQ succeeded and the info is filled or
+ * false otherwise.
+ */
+static bool ap_queue_info(ap_qid_t qid, int *q_type,
+ unsigned int *q_fac, int *q_depth, bool *q_decfg)
{
struct ap_queue_status status;
- unsigned long info;
- int nd;
+ unsigned long info = 0;
- if (!ap_test_config_card_id(AP_QID_CARD(qid)))
- return -ENODEV;
+ /* make sure we don't run into a specifiation exception */
+ if (AP_QID_CARD(qid) > ap_max_adapter_id ||
+ AP_QID_QUEUE(qid) > ap_max_domain_id)
+ return false;
+ /* call TAPQ on this APQN */
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) {
+ case AP_RESPONSE_RESET_IN_PROGRESS:
+ case AP_RESPONSE_DECONFIGURED:
+ case AP_RESPONSE_CHECKSTOPPED:
+ case AP_RESPONSE_BUSY:
+ /*
+ * According to the architecture in all these cases the
+ * info should be filled. All bits 0 is not possible as
+ * there is at least one of the mode bits set.
+ */
+ if (WARN_ON_ONCE(!info))
+ return false;
+ *q_type = (int)((info >> 24) & 0xff);
+ *q_fac = (unsigned int)(info >> 32);
+ *q_depth = (int)(info & 0xff);
+ *q_decfg = status.response_code == AP_RESPONSE_DECONFIGURED;
+ switch (*q_type) {
/* For CEX2 and CEX3 the available functions
- * are not refrected by the facilities bits.
+ * are not reflected 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;
+ *q_fac |= 0x08000000;
break;
case AP_DEVICE_TYPE_CEX2C:
case AP_DEVICE_TYPE_CEX3C:
- *facilities |= 0x10000000;
+ *q_fac |= 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;
+ return true;
default:
- BUG();
+ /*
+ * A response code which indicates, there is no info available.
+ */
+ return false;
}
}
-void ap_wait(enum ap_wait wait)
+void ap_wait(enum ap_sm_wait wait)
{
ktime_t hr_time;
switch (wait) {
- case AP_WAIT_AGAIN:
- case AP_WAIT_INTERRUPT:
- if (ap_using_interrupts())
+ case AP_SM_WAIT_AGAIN:
+ case AP_SM_WAIT_INTERRUPT:
+ if (ap_irq_flag)
break;
if (ap_poll_kthread) {
wake_up(&ap_poll_wait);
break;
}
- /* Fall through */
- case AP_WAIT_TIMEOUT:
+ fallthrough;
+ case AP_SM_WAIT_TIMEOUT:
spin_lock_bh(&ap_poll_timer_lock);
if (!hrtimer_is_queued(&ap_poll_timer)) {
hr_time = poll_timeout;
@@ -354,7 +376,7 @@
}
spin_unlock_bh(&ap_poll_timer_lock);
break;
- case AP_WAIT_NONE:
+ case AP_SM_WAIT_NONE:
default:
break;
}
@@ -370,10 +392,8 @@
{
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));
+ ap_wait(ap_sm_event(aq, AP_SM_EVENT_TIMEOUT));
spin_unlock_bh(&aq->lock);
}
@@ -385,8 +405,7 @@
*/
static enum hrtimer_restart ap_poll_timeout(struct hrtimer *unused)
{
- if (!ap_suspend_flag)
- tasklet_schedule(&ap_tasklet);
+ tasklet_schedule(&ap_tasklet);
return HRTIMER_NORESTART;
}
@@ -394,11 +413,10 @@
* ap_interrupt_handler() - Schedule ap_tasklet on interrupt
* @airq: pointer to adapter interrupt descriptor
*/
-static void ap_interrupt_handler(struct airq_struct *airq)
+static void ap_interrupt_handler(struct airq_struct *airq, bool floating)
{
inc_irq_stat(IRQIO_APB);
- if (!ap_suspend_flag)
- tasklet_schedule(&ap_tasklet);
+ tasklet_schedule(&ap_tasklet);
}
/**
@@ -409,45 +427,41 @@
*/
static void ap_tasklet_fn(unsigned long dummy)
{
- struct ap_card *ac;
+ int bkt;
struct ap_queue *aq;
- enum ap_wait wait = AP_WAIT_NONE;
+ enum ap_sm_wait wait = AP_SM_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())
+ if (ap_irq_flag)
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_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ spin_lock_bh(&aq->lock);
+ wait = min(wait, ap_sm_event_loop(aq, AP_SM_EVENT_POLL));
+ spin_unlock_bh(&aq->lock);
}
- spin_unlock_bh(&ap_list_lock);
+ spin_unlock_bh(&ap_queues_lock);
ap_wait(wait);
}
static int ap_pending_requests(void)
{
- struct ap_card *ac;
+ int bkt;
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_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ if (aq->queue_count == 0)
+ continue;
+ spin_unlock_bh(&ap_queues_lock);
+ return 1;
}
- spin_unlock_bh(&ap_list_lock);
+ spin_unlock_bh(&ap_queues_lock);
return 0;
}
@@ -470,7 +484,7 @@
while (!kthread_should_stop()) {
add_wait_queue(&ap_poll_wait, &wait);
set_current_state(TASK_INTERRUPTIBLE);
- if (ap_suspend_flag || !ap_pending_requests()) {
+ if (!ap_pending_requests()) {
schedule();
try_to_freeze();
}
@@ -491,7 +505,7 @@
{
int rc;
- if (ap_using_interrupts() || ap_poll_kthread)
+ if (ap_irq_flag || ap_poll_kthread)
return 0;
mutex_lock(&ap_poll_thread_mutex);
ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll");
@@ -571,51 +585,6 @@
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) &&
@@ -624,67 +593,10 @@
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)
@@ -701,8 +613,8 @@
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);
+ AP_DBF_DBG("reprobing queue=%02x.%04x\n",
+ card, queue);
rc = device_reprobe(dev);
}
}
@@ -759,7 +671,10 @@
{
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;
+ int card, queue, devres, drvres, rc = -ENODEV;
+
+ if (!get_device(dev))
+ return rc;
if (is_queue_dev(dev)) {
/*
@@ -776,33 +691,30 @@
mutex_unlock(&ap_perms_mutex);
drvres = ap_drv->flags & AP_DRIVER_FLAG_DEFAULT;
if (!!devres != !!drvres)
- return -ENODEV;
- /* (re-)init queue's state machine */
- ap_queue_reinit_state(to_ap_queue(dev));
+ goto out;
}
/* 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);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_add(ap_queues, &to_ap_queue(dev)->hnode,
+ to_ap_queue(dev)->qid);
+ spin_unlock_bh(&ap_queues_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);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_del(&to_ap_queue(dev)->hnode);
+ spin_unlock_bh(&ap_queues_lock);
ap_dev->drv = NULL;
}
+out:
+ if (rc)
+ put_device(dev);
return rc;
}
@@ -811,29 +723,52 @@
struct ap_device *ap_dev = to_ap_dev(dev);
struct ap_driver *ap_drv = ap_dev->drv;
+ /* prepare ap queue device removal */
if (is_queue_dev(dev))
- ap_queue_remove(to_ap_queue(dev));
+ ap_queue_prepare_remove(to_ap_queue(dev));
+
+ /* driver's chance to clean up gracefully */
if (ap_drv->remove)
ap_drv->remove(ap_dev);
+ /* now do the ap queue device remove */
+ if (is_queue_dev(dev))
+ ap_queue_remove(to_ap_queue(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);
+ spin_lock_bh(&ap_queues_lock);
+ if (is_queue_dev(dev))
+ hash_del(&to_ap_queue(dev)->hnode);
+ spin_unlock_bh(&ap_queues_lock);
+
+ put_device(dev);
return 0;
}
+
+struct ap_queue *ap_get_qdev(ap_qid_t qid)
+{
+ int bkt;
+ struct ap_queue *aq;
+
+ spin_lock_bh(&ap_queues_lock);
+ hash_for_each(ap_queues, bkt, aq, hnode) {
+ if (aq->qid == qid) {
+ get_device(&aq->ap_dev.device);
+ spin_unlock_bh(&ap_queues_lock);
+ return aq;
+ }
+ }
+ spin_unlock_bh(&ap_queues_lock);
+
+ return NULL;
+}
+EXPORT_SYMBOL(ap_get_qdev);
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;
@@ -852,14 +787,22 @@
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);
+
+/*
+* A config change has happened, force an ap bus rescan.
+*/
+void ap_bus_cfg_chg(void)
+{
+ AP_DBF_DBG("%s config change, forcing bus rescan\n", __func__);
+
+ ap_bus_force_rescan();
+}
/*
* hex2bitmap() - parse hex mask string and set bitmap.
@@ -949,21 +892,9 @@
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)
+int ap_parse_mask_str(const char *str,
+ unsigned long *bitmap, int bits,
+ struct mutex *lock)
{
unsigned long *newmap, size;
int rc;
@@ -994,6 +925,7 @@
kfree(newmap);
return rc;
}
+EXPORT_SYMBOL(ap_parse_mask_str);
/*
* AP bus attributes.
@@ -1001,7 +933,7 @@
static ssize_t ap_domain_show(struct bus_type *bus, char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
}
static ssize_t ap_domain_store(struct bus_type *bus,
@@ -1013,11 +945,12 @@
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);
+ AP_DBF_INFO("stored new default domain=%d\n", domain);
return count;
}
@@ -1026,45 +959,60 @@
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");
+ if (!ap_qci_info) /* QCI not supported */
+ return scnprintf(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]);
+ return scnprintf(buf, PAGE_SIZE,
+ "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ ap_qci_info->adm[0], ap_qci_info->adm[1],
+ ap_qci_info->adm[2], ap_qci_info->adm[3],
+ ap_qci_info->adm[4], ap_qci_info->adm[5],
+ ap_qci_info->adm[6], ap_qci_info->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");
+ if (!ap_qci_info) /* QCI not supported */
+ return scnprintf(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]);
+ return scnprintf(buf, PAGE_SIZE,
+ "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ ap_qci_info->aqm[0], ap_qci_info->aqm[1],
+ ap_qci_info->aqm[2], ap_qci_info->aqm[3],
+ ap_qci_info->aqm[4], ap_qci_info->aqm[5],
+ ap_qci_info->aqm[6], ap_qci_info->aqm[7]);
}
static BUS_ATTR_RO(ap_usage_domain_mask);
+static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
+{
+ if (!ap_qci_info) /* QCI not supported */
+ return scnprintf(buf, PAGE_SIZE, "not supported\n");
+
+ return scnprintf(buf, PAGE_SIZE,
+ "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ ap_qci_info->apm[0], ap_qci_info->apm[1],
+ ap_qci_info->apm[2], ap_qci_info->apm[3],
+ ap_qci_info->apm[4], ap_qci_info->apm[5],
+ ap_qci_info->apm[6], ap_qci_info->apm[7]);
+}
+
+static BUS_ATTR_RO(ap_adapter_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);
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ ap_irq_flag ? 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);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
}
static ssize_t config_time_store(struct bus_type *bus,
@@ -1083,7 +1031,7 @@
static ssize_t poll_thread_show(struct bus_type *bus, char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
}
static ssize_t poll_thread_store(struct bus_type *bus,
@@ -1106,7 +1054,7 @@
static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
+ return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
}
static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
@@ -1135,16 +1083,17 @@
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);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_domain_id);
}
static BUS_ATTR_RO(ap_max_domain_id);
+
+static ssize_t ap_max_adapter_id_show(struct bus_type *bus, char *buf)
+{
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_adapter_id);
+}
+
+static BUS_ATTR_RO(ap_max_adapter_id);
static ssize_t apmask_show(struct bus_type *bus, char *buf)
{
@@ -1152,10 +1101,10 @@
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]);
+ rc = scnprintf(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;
@@ -1166,7 +1115,7 @@
{
int rc;
- rc = process_mask_arg(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex);
+ rc = ap_parse_mask_str(buf, ap_perms.apm, AP_DEVICES, &ap_perms_mutex);
if (rc)
return rc;
@@ -1183,10 +1132,10 @@
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]);
+ rc = scnprintf(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;
@@ -1197,7 +1146,7 @@
{
int rc;
- rc = process_mask_arg(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex);
+ rc = ap_parse_mask_str(buf, ap_perms.aqm, AP_DOMAINS, &ap_perms_mutex);
if (rc)
return rc;
@@ -1212,11 +1161,13 @@
&bus_attr_ap_domain,
&bus_attr_ap_control_domain_mask,
&bus_attr_ap_usage_domain_mask,
+ &bus_attr_ap_adapter_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_ap_max_adapter_id,
&bus_attr_apmask,
&bus_attr_aqmask,
NULL,
@@ -1228,47 +1179,42 @@
*/
static void ap_select_domain(void)
{
- int count, max_count, best_domain;
struct ap_queue_status status;
- int i, j;
+ int card, dom;
/*
- * We want to use a single domain. Either the one specified with
- * the "domain=" parameter or the domain with the maximum number
- * of devices.
+ * Choose the default domain. Either the one specified with
+ * the "domain=" parameter or the first domain with at least
+ * one valid APQN.
*/
spin_lock_bh(&ap_domain_lock);
if (ap_domain_index >= 0) {
/* Domain has already been selected. */
- spin_unlock_bh(&ap_domain_lock);
- return;
+ goto out;
}
- 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))
+ for (dom = 0; dom <= ap_max_domain_id; dom++) {
+ if (!ap_test_config_usage_domain(dom) ||
+ !test_bit_inv(dom, ap_perms.aqm))
continue;
- count = 0;
- for (j = 0; j < AP_DEVICES; j++) {
- if (!ap_test_config_card_id(j))
+ for (card = 0; card <= ap_max_adapter_id; card++) {
+ if (!ap_test_config_card_id(card) ||
+ !test_bit_inv(card, ap_perms.apm))
continue;
- status = ap_test_queue(AP_MKQID(j, i),
+ status = ap_test_queue(AP_MKQID(card, dom),
ap_apft_available(),
NULL);
- if (status.response_code != AP_RESPONSE_NORMAL)
- continue;
- count++;
+ if (status.response_code == AP_RESPONSE_NORMAL)
+ break;
}
- if (count > max_count) {
- max_count = count;
- best_domain = i;
- }
+ if (card <= ap_max_adapter_id)
+ break;
}
- if (best_domain >= 0) {
- ap_domain_index = best_domain;
- AP_DBF(DBF_DEBUG, "new ap_domain_index=%d\n", ap_domain_index);
+ if (dom <= ap_max_domain_id) {
+ ap_domain_index = dom;
+ AP_DBF_INFO("%s new default domain is %d\n",
+ __func__, ap_domain_index);
}
+out:
spin_unlock_bh(&ap_domain_lock);
}
@@ -1282,52 +1228,345 @@
int comp_type = 0;
/* < CEX2A is not supported */
- if (rawtype < AP_DEVICE_TYPE_CEX2A)
+ if (rawtype < AP_DEVICE_TYPE_CEX2A) {
+ AP_DBF_WARN("get_comp_type queue=%02x.%04x unsupported type %d\n",
+ AP_QID_CARD(qid), AP_QID_QUEUE(qid), rawtype);
return 0;
- /* up to CEX6 known and fully supported */
- if (rawtype <= AP_DEVICE_TYPE_CEX6)
+ }
+ /* up to CEX7 known and fully supported */
+ if (rawtype <= AP_DEVICE_TYPE_CEX7)
return rawtype;
/*
- * unknown new type > CEX6, check for compatibility
+ * unknown new type > CEX7, check for compatibility
* to the highest known and supported type which is
- * currently CEX6 with the help of the QACT function.
+ * currently CEX7 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;
+ apinfo.cat = AP_DEVICE_TYPE_CEX7;
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)
+ && apinfo.cat <= AP_DEVICE_TYPE_CEX7)
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);
+ AP_DBF_WARN("get_comp_type 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);
+ AP_DBF_INFO("get_comp_type 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
+ * 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)
+static int __match_card_device_with_id(struct device *dev, const void *data)
{
- return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long) data;
+ return is_card_dev(dev) && to_ap_card(dev)->id == (int)(long)(void *) data;
}
-/* helper function to be used with bus_find_dev
+/*
+ * 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)
+static int __match_queue_device_with_qid(struct device *dev, const void *data)
{
return is_queue_dev(dev) && to_ap_queue(dev)->qid == (int)(long) data;
+}
+
+/*
+ * Helper function to be used with bus_find_dev
+ * matches any queue device with given queue id
+ */
+static int __match_queue_device_with_queue_id(struct device *dev, const void *data)
+{
+ return is_queue_dev(dev)
+ && AP_QID_QUEUE(to_ap_queue(dev)->qid) == (int)(long) data;
+}
+
+/*
+ * Helper function for ap_scan_bus().
+ * Remove card device and associated queue devices.
+ */
+static inline void ap_scan_rm_card_dev_and_queue_devs(struct ap_card *ac)
+{
+ bus_for_each_dev(&ap_bus_type, NULL,
+ (void *)(long) ac->id,
+ __ap_queue_devices_with_id_unregister);
+ device_unregister(&ac->ap_dev.device);
+}
+
+/*
+ * Helper function for ap_scan_bus().
+ * Does the scan bus job for all the domains within
+ * a valid adapter given by an ap_card ptr.
+ */
+static inline void ap_scan_domains(struct ap_card *ac)
+{
+ bool decfg;
+ ap_qid_t qid;
+ unsigned int func;
+ struct device *dev;
+ struct ap_queue *aq;
+ int rc, dom, depth, type;
+
+ /*
+ * Go through the configuration for the domains and compare them
+ * to the existing queue devices. Also take care of the config
+ * and error state for the queue devices.
+ */
+
+ for (dom = 0; dom <= ap_max_domain_id; dom++) {
+ qid = AP_MKQID(ac->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_usage_domain(dom)) {
+ if (dev) {
+ AP_DBF_INFO("%s(%d,%d) not in config any more, rm queue device\n",
+ __func__, ac->id, dom);
+ device_unregister(dev);
+ put_device(dev);
+ }
+ continue;
+ }
+ /* domain is valid, get info from this APQN */
+ if (!ap_queue_info(qid, &type, &func, &depth, &decfg)) {
+ if (aq) {
+ AP_DBF_INFO(
+ "%s(%d,%d) ap_queue_info() not successful, rm queue device\n",
+ __func__, ac->id, dom);
+ device_unregister(dev);
+ put_device(dev);
+ }
+ continue;
+ }
+ /* if no queue device exists, create a new one */
+ if (!aq) {
+ aq = ap_queue_create(qid, ac->ap_dev.device_type);
+ if (!aq) {
+ AP_DBF_WARN("%s(%d,%d) ap_queue_create() failed\n",
+ __func__, ac->id, dom);
+ continue;
+ }
+ aq->card = ac;
+ aq->config = !decfg;
+ dev = &aq->ap_dev.device;
+ dev->bus = &ap_bus_type;
+ dev->parent = &ac->ap_dev.device;
+ dev_set_name(dev, "%02x.%04x", ac->id, dom);
+ /* register queue device */
+ rc = device_register(dev);
+ if (rc) {
+ AP_DBF_WARN("%s(%d,%d) device_register() failed\n",
+ __func__, ac->id, dom);
+ goto put_dev_and_continue;
+ }
+ /* get it and thus adjust reference counter */
+ get_device(dev);
+ if (decfg)
+ AP_DBF_INFO("%s(%d,%d) new (decfg) queue device created\n",
+ __func__, ac->id, dom);
+ else
+ AP_DBF_INFO("%s(%d,%d) new queue device created\n",
+ __func__, ac->id, dom);
+ goto put_dev_and_continue;
+ }
+ /* Check config state on the already existing queue device */
+ spin_lock_bh(&aq->lock);
+ if (decfg && aq->config) {
+ /* config off this queue device */
+ aq->config = false;
+ if (aq->dev_state > AP_DEV_STATE_UNINITIATED) {
+ aq->dev_state = AP_DEV_STATE_ERROR;
+ aq->last_err_rc = AP_RESPONSE_DECONFIGURED;
+ }
+ spin_unlock_bh(&aq->lock);
+ AP_DBF_INFO("%s(%d,%d) queue device config off\n",
+ __func__, ac->id, dom);
+ /* 'receive' pending messages with -EAGAIN */
+ ap_flush_queue(aq);
+ goto put_dev_and_continue;
+ }
+ if (!decfg && !aq->config) {
+ /* config on this queue device */
+ aq->config = true;
+ if (aq->dev_state > AP_DEV_STATE_UNINITIATED) {
+ aq->dev_state = AP_DEV_STATE_OPERATING;
+ aq->sm_state = AP_SM_STATE_RESET_START;
+ }
+ spin_unlock_bh(&aq->lock);
+ AP_DBF_INFO("%s(%d,%d) queue device config on\n",
+ __func__, ac->id, dom);
+ goto put_dev_and_continue;
+ }
+ /* handle other error states */
+ if (!decfg && aq->dev_state == AP_DEV_STATE_ERROR) {
+ spin_unlock_bh(&aq->lock);
+ /* 'receive' pending messages with -EAGAIN */
+ ap_flush_queue(aq);
+ /* re-init (with reset) the queue device */
+ ap_queue_init_state(aq);
+ AP_DBF_INFO("%s(%d,%d) queue device reinit enforced\n",
+ __func__, ac->id, dom);
+ goto put_dev_and_continue;
+ }
+ spin_unlock_bh(&aq->lock);
+put_dev_and_continue:
+ put_device(dev);
+ }
+}
+
+/*
+ * Helper function for ap_scan_bus().
+ * Does the scan bus job for the given adapter id.
+ */
+static inline void ap_scan_adapter(int ap)
+{
+ bool decfg;
+ ap_qid_t qid;
+ unsigned int func;
+ struct device *dev;
+ struct ap_card *ac;
+ int rc, dom, depth, type, comp_type;
+
+ /* Is there currently a card device for this adapter ? */
+ dev = bus_find_device(&ap_bus_type, NULL,
+ (void *)(long) ap,
+ __match_card_device_with_id);
+ ac = dev ? to_ap_card(dev) : NULL;
+
+ /* Adapter not in configuration ? */
+ if (!ap_test_config_card_id(ap)) {
+ if (ac) {
+ AP_DBF_INFO("%s(%d) ap not in config any more, rm card and queue devices\n",
+ __func__, ap);
+ ap_scan_rm_card_dev_and_queue_devs(ac);
+ put_device(dev);
+ }
+ return;
+ }
+
+ /*
+ * Adapter ap is valid in the current configuration. So do some checks:
+ * If no card device exists, build one. If a card device exists, check
+ * for type and functions changed. For all this we need to find a valid
+ * APQN first.
+ */
+
+ for (dom = 0; dom <= ap_max_domain_id; dom++)
+ if (ap_test_config_usage_domain(dom)) {
+ qid = AP_MKQID(ap, dom);
+ if (ap_queue_info(qid, &type, &func, &depth, &decfg))
+ break;
+ }
+ if (dom > ap_max_domain_id) {
+ /* Could not find a valid APQN for this adapter */
+ if (ac) {
+ AP_DBF_INFO(
+ "%s(%d) no type info (no APQN found), rm card and queue devices\n",
+ __func__, ap);
+ ap_scan_rm_card_dev_and_queue_devs(ac);
+ put_device(dev);
+ } else {
+ AP_DBF_DBG("%s(%d) no type info (no APQN found), ignored\n",
+ __func__, ap);
+ }
+ return;
+ }
+ if (!type) {
+ /* No apdater type info available, an unusable adapter */
+ if (ac) {
+ AP_DBF_INFO("%s(%d) no valid type (0) info, rm card and queue devices\n",
+ __func__, ap);
+ ap_scan_rm_card_dev_and_queue_devs(ac);
+ put_device(dev);
+ } else {
+ AP_DBF_DBG("%s(%d) no valid type (0) info, ignored\n",
+ __func__, ap);
+ }
+ return;
+ }
+
+ if (ac) {
+ /* Check APQN against existing card device for changes */
+ if (ac->raw_hwtype != type) {
+ AP_DBF_INFO("%s(%d) hwtype %d changed, rm card and queue devices\n",
+ __func__, ap, type);
+ ap_scan_rm_card_dev_and_queue_devs(ac);
+ put_device(dev);
+ ac = NULL;
+ } else if (ac->functions != func) {
+ AP_DBF_INFO("%s(%d) functions 0x%08x changed, rm card and queue devices\n",
+ __func__, ap, type);
+ ap_scan_rm_card_dev_and_queue_devs(ac);
+ put_device(dev);
+ ac = NULL;
+ } else {
+ if (decfg && ac->config) {
+ ac->config = false;
+ AP_DBF_INFO("%s(%d) card device config off\n",
+ __func__, ap);
+
+ }
+ if (!decfg && !ac->config) {
+ ac->config = true;
+ AP_DBF_INFO("%s(%d) card device config on\n",
+ __func__, ap);
+ }
+ }
+ }
+
+ if (!ac) {
+ /* Build a new card device */
+ comp_type = ap_get_compatible_type(qid, type, func);
+ if (!comp_type) {
+ AP_DBF_WARN("%s(%d) type %d, can't get compatibility type\n",
+ __func__, ap, type);
+ return;
+ }
+ ac = ap_card_create(ap, depth, type, comp_type, func);
+ if (!ac) {
+ AP_DBF_WARN("%s(%d) ap_card_create() failed\n",
+ __func__, ap);
+ return;
+ }
+ ac->config = !decfg;
+ dev = &ac->ap_dev.device;
+ dev->bus = &ap_bus_type;
+ dev->parent = ap_root_device;
+ dev_set_name(dev, "card%02x", ap);
+ /* Register the new card device with AP bus */
+ rc = device_register(dev);
+ if (rc) {
+ AP_DBF_WARN("%s(%d) device_register() failed\n",
+ __func__, ap);
+ put_device(dev);
+ return;
+ }
+ /* get it and thus adjust reference counter */
+ get_device(dev);
+ if (decfg)
+ AP_DBF_INFO("%s(%d) new (decfg) card device type=%d func=0x%08x created\n",
+ __func__, ap, type, func);
+ else
+ AP_DBF_INFO("%s(%d) new card device type=%d func=0x%08x created\n",
+ __func__, ap, type, func);
+ }
+
+ /* Verify the domains and the queue devices for this card */
+ ap_scan_domains(ac);
+
+ /* release the card device */
+ put_device(&ac->ap_dev.device);
}
/**
@@ -1336,145 +1575,35 @@
*/
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;
+ int ap;
- AP_DBF(DBF_DEBUG, "%s running\n", __func__);
-
- ap_query_configuration(ap_configuration);
+ ap_fetch_qci_info(ap_qci_info);
ap_select_domain();
- 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);
- /* 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 */
+ AP_DBF_DBG("%s running\n", __func__);
- if (ap_domain_index >= 0 && defdomdevs < 1)
- AP_DBF(DBF_INFO,
- "no queue device with default domain %d available\n",
- ap_domain_index);
+ /* loop over all possible adapters */
+ for (ap = 0; ap <= ap_max_adapter_id; ap++)
+ ap_scan_adapter(ap);
+
+ /* check if there is at least one queue available with default domain */
+ if (ap_domain_index >= 0) {
+ struct device *dev =
+ bus_find_device(&ap_bus_type, NULL,
+ (void *)(long) ap_domain_index,
+ __match_queue_device_with_queue_id);
+ if (dev)
+ put_device(dev);
+ else
+ AP_DBF_INFO("no queue device with default domain %d available\n",
+ ap_domain_index);
+ }
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);
}
@@ -1491,21 +1620,22 @@
static void __init ap_perms_init(void)
{
/* all resources useable if no kernel parameter string given */
+ memset(&ap_perms.ioctlm, 0xFF, sizeof(ap_perms.ioctlm));
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);
+ ap_parse_mask_str(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_parse_mask_str(aqm_str, ap_perms.aqm, AP_DOMAINS,
+ &ap_perms_mutex);
}
}
@@ -1516,7 +1646,6 @@
*/
static int __init ap_module_init(void)
{
- int max_domain_id;
int rc, i;
rc = ap_debug_init();
@@ -1528,33 +1657,28 @@
return -ENODEV;
}
- /* set up the AP permissions (ap and aq masks) */
+ /* init ap_queue hashtable */
+ hash_init(ap_queues);
+
+ /* set up the AP permissions (ioctls, ap and aq masks) */
ap_perms_init();
/* Get AP configuration data if available */
- ap_init_configuration();
+ ap_init_qci_info();
- 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 ||
+ /* check default domain setting */
+ if (ap_domain_index < -1 || ap_domain_index > ap_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;
+ /* enable interrupts if available */
if (ap_interrupts_available()) {
rc = register_adapter_interrupt(&ap_airq);
- ap_airq_flag = (rc == 0);
+ ap_irq_flag = (rc == 0);
}
/* Create /sys/bus/ap. */
@@ -1582,7 +1706,6 @@
*/
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;
@@ -1593,17 +1716,10 @@
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);
@@ -1612,9 +1728,9 @@
bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
bus_unregister(&ap_bus_type);
out:
- if (ap_using_interrupts())
+ if (ap_irq_flag)
unregister_adapter_interrupt(&ap_airq);
- kfree(ap_configuration);
+ kfree(ap_qci_info);
return rc;
}
device_initcall(ap_module_init);
--
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