static void ap_reset(struct ap_device *ap_dev, unsigned long *flags);
static void ap_config_timeout(unsigned long ptr);
static int ap_select_domain(void);
-static void ap_query_configuration(void);
/*
* Module description.
/* 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. */
return reg1_out;
}
-static inline int __ap_query_configuration(struct ap_config_info *config)
+/**
+ * ap_query_configuration(): Get AP configuration data
+ *
+ * Returns 0 on success, or -EOPNOTSUPP.
+ */
+static inline int ap_query_configuration(void)
{
register unsigned long reg0 asm ("0") = 0x04000000UL;
register unsigned long reg1 asm ("1") = -EINVAL;
- register unsigned char *reg2 asm ("2") = (unsigned char *)config;
+ register void *reg2 asm ("2") = (void *) ap_configuration;
+ if (!ap_configuration)
+ return -EOPNOTSUPP;
asm volatile(
".long 0xb2af0000\n" /* PQAP(QCI) */
"0: la %1,0\n"
return reg1;
}
+/**
+ * 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() != 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_queue_enable_interruption(): Enable interruption on an AP.
* @qid: The AP queue number
{
struct ap_queue_status status;
unsigned long info;
+ int nd;
+
+ if (!ap_test_config_card_id(AP_QID_DEVICE(qid)))
+ return -ENODEV;
status = ap_test_queue(qid, &info);
switch (status.response_code) {
*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 ((info & (1UL << 57)) && nd > 0)
+ ap_max_domain_id = nd;
return 0;
case AP_RESPONSE_Q_NOT_AVAIL:
case AP_RESPONSE_DECONFIGURED:
}
EXPORT_SYMBOL(ap_bus_force_rescan);
-/*
- * 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)
-{
- if (nr > 0xFFu)
- return 0;
- 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)
- 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 */
- if (domain < 16)
- return 1; /* then domains 0...15 are configured */
- else
- return 0;
- else
- return ap_test_config(ap_configuration->aqm, domain);
-}
-
/*
* AP bus attributes.
*/
static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
{
- if (ap_configuration != NULL) { /* QCI not supported */
- if (test_facility(76)) { /* format 1 - 256 bit domain field */
- return snprintf(buf, PAGE_SIZE,
- "0x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+ if (!ap_configuration) /* QCI not supported */
+ return snprintf(buf, PAGE_SIZE, "not supported\n");
+ if (!test_facility(76))
+ /* format 0 - 16 bit domain field */
+ return snprintf(buf, PAGE_SIZE, "%08x%08x\n",
+ ap_configuration->adm[0],
+ ap_configuration->adm[1]);
+ /* format 1 - 256 bit domain field */
+ 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]);
- } else { /* format 0 - 16 bit domain field */
- return snprintf(buf, PAGE_SIZE, "%08x%08x\n",
- ap_configuration->adm[0], ap_configuration->adm[1]);
- }
- } else {
- return snprintf(buf, PAGE_SIZE, "not supported\n");
- }
}
static BUS_ATTR(ap_control_domain_mask, 0444,
static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
{
- struct ap_queue_status status;
- ap_qid_t qid;
- int i, nd, max_domain_id = -1;
- unsigned long fbits;
-
- if (ap_configuration) {
- if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS) {
- for (i = 0; i < AP_DEVICES; i++) {
- if (!ap_test_config_card_id(i))
- continue;
- qid = AP_MKQID(i, ap_domain_index);
- status = ap_test_queue(qid, &fbits);
- if (status.response_code != AP_RESPONSE_NORMAL)
- continue;
- if (fbits & (1UL << 57)) {
- /* the N bit is 0, Nd field is filled */
- nd = (int)((fbits & 0x00FF0000UL)>>16);
- if (nd > 0)
- max_domain_id = nd;
- else
- max_domain_id = 15;
- } else {
- /* N bit is 1, max 16 domains */
- max_domain_id = 15;
- }
- break;
- }
- }
- } else {
- /* no APXA support, older machines with max 16 domains */
+ 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);
}
NULL,
};
-/**
- * ap_query_configuration(): Query AP configuration information.
- *
- * Query information of installed cards and configured domains from AP.
- */
-static void ap_query_configuration(void)
-{
- if (ap_configuration_available()) {
- if (!ap_configuration)
- ap_configuration =
- kzalloc(sizeof(struct ap_config_info),
- GFP_KERNEL);
- if (ap_configuration)
- __ap_query_configuration(ap_configuration);
- } else
- ap_configuration = NULL;
-}
-
/**
* ap_select_domain(): Select an AP domain.
*
struct ap_queue_status status;
int i, j;
- /* IF APXA isn't installed, only 16 domains could be defined */
- if (!ap_configuration->ap_extended && (ap_domain_index > 15))
- return -EINVAL;
-
/*
* We want to use a single domain. Either the one specified with
* the "domain=" parameter or the domain with the maximum number
* of devices.
*/
- if (ap_domain_index >= 0 && ap_domain_index < AP_DOMAINS)
+ if (ap_domain_index >= 0)
/* Domain has already been selected. */
return 0;
best_domain = -1;
if (ap_select_domain() != 0) {
return;
}
+
for (i = 0; i < AP_DEVICES; i++) {
qid = AP_MKQID(i, ap_domain_index);
dev = bus_find_device(&ap_bus_type, NULL,
(void *)(unsigned long)qid,
__ap_scan_bus);
- if (ap_test_config_card_id(i))
- rc = ap_query_queue(qid, &queue_depth, &device_type,
- &device_functions);
- else
- rc = -ENODEV;
+ rc = ap_query_queue(qid, &queue_depth, &device_type,
+ &device_functions);
if (dev) {
ap_dev = to_ap_dev(dev);
spin_lock_bh(&ap_dev->lock);
{
int i;
- if ((ap_domain_index != -1) && (ap_test_config_domain(ap_domain_index)))
- for (i = 0; i < AP_DEVICES; i++)
- ap_reset_queue(AP_MKQID(i, ap_domain_index));
+ if (ap_domain_index == -1 || !ap_test_config_domain(ap_domain_index))
+ return;
+ for (i = 0; i < AP_DEVICES; i++)
+ ap_reset_queue(AP_MKQID(i, ap_domain_index));
}
static void ap_reset_all(void)
*/
int __init ap_module_init(void)
{
+ int max_domain_id;
int rc, i;
- if (ap_domain_index < -1 || ap_domain_index >= AP_DOMAINS) {
- pr_warning("%d is not a valid cryptographic domain\n",
- ap_domain_index);
+ if (ap_instructions_available() != 0) {
+ pr_warn("The hardware system does not support AP instructions\n");
+ return -ENODEV;
+ }
+
+ /* Get AP configuration data if available */
+ ap_init_configuration();
+
+ if (ap_configuration)
+ 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) {
+ pr_warn("%d is not a valid cryptographic domain\n",
+ ap_domain_index);
return -EINVAL;
}
/* In resume callback we need to know if the user had set the domain.
if (ap_domain_index >= 0)
user_set_domain = 1;
- if (ap_instructions_available() != 0) {
- pr_warning("The hardware system does not support "
- "AP instructions\n");
- return -ENODEV;
- }
if (ap_interrupts_available()) {
rc = register_adapter_interrupt(&ap_airq);
ap_airq_flag = (rc == 0);
goto out_root;
}
- ap_query_configuration();
if (ap_select_domain() == 0)
ap_scan_bus(NULL);
unregister_reset_call(&ap_reset_call);
if (ap_using_interrupts())
unregister_adapter_interrupt(&ap_airq);
+ kfree(ap_configuration);
return rc;
}
bus_remove_file(&ap_bus_type, ap_bus_attrs[i]);
root_device_unregister(ap_root_device);
bus_unregister(&ap_bus_type);
+ kfree(ap_configuration);
unregister_reset_call(&ap_reset_call);
if (ap_using_interrupts())
unregister_adapter_interrupt(&ap_airq);
projects / linux-beck.git / commitdiff