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.
*/
static unsigned long long poll_timeout = 250000;
-/* Maximum domain id */
-static int ap_max_domain_id;
+/* 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;
}
/**
- * 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);
}
*/
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;
}
/**
- * ap_init_configuration(): Allocate and query configuration array.
+ * 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.
+
*/
-static void ap_init_configuration(void)
+static void __init ap_init_qci_info(void)
{
- if (!ap_configuration_available())
+ if (!ap_qci_available()) {
+ AP_DBF(DBF_INFO, "%s QCI not supported\n", __func__);
return;
+ }
- ap_configuration = kzalloc(sizeof(*ap_configuration), GFP_KERNEL);
- if (!ap_configuration)
+ ap_qci_info = kzalloc(sizeof(*ap_qci_info), GFP_KERNEL);
+ if (!ap_qci_info)
return;
- if (ap_query_configuration(ap_configuration) != 0) {
- kfree(ap_configuration);
- ap_configuration = NULL;
+ if (ap_fetch_qci_info(ap_qci_info) != 0) {
+ kfree(ap_qci_info);
+ ap_qci_info = NULL;
return;
}
+ AP_DBF(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(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(DBF_INFO, "%s new ap_max_domain_id is %d\n",
+ __func__, ap_max_domain_id);
+ }
+ }
}
/*
/*
* 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
*/
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_usage_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
*/
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);
*/
int ap_test_config_ctrl_domain(unsigned int domain)
{
- if (!ap_configuration) /* QCI not supported */
+ if (!ap_qci_info || domain > ap_max_domain_id)
return 0;
- return ap_test_config(ap_configuration->adm, domain);
+ return ap_test_config(ap_qci_info->adm, domain);
}
EXPORT_SYMBOL(ap_test_config_ctrl_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_queue_info(): Check and get AP queue info.
+ * Returns true if TAPQ succeeded and the info is filled or
+ * false otherwise.
*/
-static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type,
- unsigned int *facilities)
+static bool ap_queue_info(ap_qid_t qid, int *q_type,
+ unsigned int *q_fac, int *q_depth)
{
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:
+ /*
+ * 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);
+ switch (*q_type) {
/* For CEX2 and CEX3 the available functions
* are not reflected by the facilities bits.
* Instead it is coded into the type. So here
*/
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;
}
}
{
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;
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(DBF_INFO, "stored new default domain=%d\n", domain);
return count;
}
static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
{
- if (!ap_configuration) /* QCI not supported */
+ 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_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]);
+ 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 */
+ 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_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]);
+ 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_configuration) /* QCI not supported */
+ 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_configuration->apm[0], ap_configuration->apm[1],
- ap_configuration->apm[2], ap_configuration->apm[3],
- ap_configuration->apm[4], ap_configuration->apm[5],
- ap_configuration->apm[6], ap_configuration->apm[7]);
+ 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_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 scnprintf(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)
{
int rc;
&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,
*/
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_usage_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 (count > max_count) {
- max_count = count;
- best_domain = i;
+ if (status.response_code == AP_RESPONSE_NORMAL)
+ break;
}
+ 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(DBF_DEBUG, "%s new default domain is %d\n",
+ __func__, ap_domain_index);
}
+out:
spin_unlock_bh(&ap_domain_lock);
}
*/
static void _ap_scan_bus_adapter(int id)
{
+ bool broken;
ap_qid_t qid;
unsigned int func;
struct ap_card *ac;
struct device *dev;
struct ap_queue *aq;
- int rc, dom, depth, type, comp_type, borked;
+ int rc, dom, depth, type, comp_type;
/* check if there is a card device registered with this id */
dev = bus_find_device(&ap_bus_type, NULL,
/* find the first valid queue */
for (dom = 0; dom < AP_DOMAINS; dom++) {
qid = AP_MKQID(id, dom);
- if (ap_query_queue(qid, &depth, &type, &func) == 0)
+ if (ap_queue_info(qid, &type, &func, &depth))
break;
}
- borked = 0;
+ broken = false;
if (dom >= AP_DOMAINS) {
/* no accessible queue on this card */
- borked = 1;
+ broken = true;
} else if (ac->raw_hwtype != type) {
/* card type has changed */
AP_DBF(DBF_INFO, "card=%02x type changed.\n", id);
- borked = 1;
+ broken = true;
} else if (ac->functions != func) {
/* card functions have changed */
AP_DBF(DBF_INFO, "card=%02x functions changed.\n", id);
- borked = 1;
+ broken = true;
}
- if (borked) {
+ if (broken) {
/* unregister card device and associated queues */
bus_for_each_dev(&ap_bus_type, NULL,
(void *)(long) id,
continue;
}
/* try to fetch infos about this queue */
- rc = ap_query_queue(qid, &depth, &type, &func);
+ broken = !ap_queue_info(qid, &type, &func, &depth);
if (dev) {
- if (rc == -ENODEV)
- borked = 1;
- else {
+ if (!broken) {
spin_lock_bh(&aq->lock);
- borked = aq->sm_state == AP_SM_STATE_BORKED;
+ broken = aq->sm_state == AP_SM_STATE_BORKED;
spin_unlock_bh(&aq->lock);
}
- if (borked) {
+ if (broken) {
/* Remove broken device */
AP_DBF(DBF_DEBUG,
"removing broken queue=%02x.%04x\n",
put_device(dev);
continue;
}
- if (rc)
+ if (broken)
continue;
/* a new queue device is needed, check out comp type */
comp_type = ap_get_compatible_type(qid, type, func);
{
int id;
- AP_DBF(DBF_DEBUG, "%s running\n", __func__);
-
- ap_query_configuration(ap_configuration);
+ ap_fetch_qci_info(ap_qci_info);
ap_select_domain();
+ AP_DBF(DBF_DEBUG, "%s running\n", __func__);
+
/* loop over all possible adapters */
for (id = 0; id < AP_DEVICES; id++)
_ap_scan_bus_adapter(id);
*/
static int __init ap_module_init(void)
{
- int max_domain_id;
int rc, i;
rc = ap_debug_init();
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_init_qci_info();
+
+ /* 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 = -1;
}
+ /* enable interrupts if available */
if (ap_interrupts_available()) {
rc = register_adapter_interrupt(&ap_airq);
ap_airq_flag = (rc == 0);
}
queue_work(system_long_wq, &ap_scan_work);
- initialised = true;
return 0;
out:
if (ap_using_interrupts())
unregister_adapter_interrupt(&ap_airq);
- kfree(ap_configuration);
+ kfree(ap_qci_info);
return rc;
}
device_initcall(ap_module_init);
projects / linux.git / commitdiff