diff options
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 121 |
1 files changed, 112 insertions, 9 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index ae258a4b4e5e..047c7327b1b4 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -1,5 +1,5 @@ /* - * Copyright IBM Corp. 2006 + * 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> @@ -62,13 +62,14 @@ static void ap_interrupt_handler(void *unused1, void *unused2); static void ap_reset(struct ap_device *ap_dev); static void ap_config_timeout(unsigned long ptr); static int ap_select_domain(void); +static void ap_query_configuration(void); /* * Module description. */ MODULE_AUTHOR("IBM Corporation"); -MODULE_DESCRIPTION("Adjunct Processor Bus driver, " - "Copyright IBM Corp. 2006"); +MODULE_DESCRIPTION("Adjunct Processor Bus driver, " \ + "Copyright IBM Corp. 2006, 2012"); MODULE_LICENSE("GPL"); /* @@ -84,6 +85,7 @@ module_param_named(poll_thread, ap_thread_flag, int, 0000); MODULE_PARM_DESC(poll_thread, "Turn on/off poll thread, default is 0 (off)."); static struct device *ap_root_device = NULL; +static struct ap_config_info *ap_configuration; static DEFINE_SPINLOCK(ap_device_list_lock); static LIST_HEAD(ap_device_list); @@ -158,6 +160,17 @@ static int ap_interrupts_available(void) } /** + * 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(2) && test_facility(12); +} + +/** * ap_test_queue(): Test adjunct processor queue. * @qid: The AP queue number * @queue_depth: Pointer to queue depth value @@ -242,6 +255,26 @@ __ap_query_functions(ap_qid_t qid, unsigned int *functions) } #endif +#ifdef CONFIG_64BIT +static inline int __ap_query_configuration(struct ap_config_info *config) +{ + register unsigned long reg0 asm ("0") = 0x04000000UL; + register unsigned long reg1 asm ("1") = -EINVAL; + register unsigned char *reg2 asm ("2") = (unsigned char *)config; + + asm volatile( + ".long 0xb2af0000\n" /* PQAP(QCI) */ + "0: la %1,0\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (reg0), "+d" (reg1), "+d" (reg2) + : + : "cc"); + + return reg1; +} +#endif + /** * ap_query_functions(): Query supported functions. * @qid: The AP queue number @@ -305,8 +338,8 @@ int ap_4096_commands_available(ap_qid_t qid) if (ap_query_functions(qid, &functions)) return 0; - return test_ap_facility(functions, 1) && - test_ap_facility(functions, 2); + return ap_test_bit(&functions, 1) && + ap_test_bit(&functions, 2); } EXPORT_SYMBOL(ap_4096_commands_available); @@ -772,6 +805,7 @@ static int ap_bus_resume(struct device *dev) ap_suspend_flag = 0; if (!ap_interrupts_available()) ap_interrupt_indicator = NULL; + ap_query_configuration(); if (!user_set_domain) { ap_domain_index = -1; ap_select_domain(); @@ -997,6 +1031,65 @@ static struct bus_attribute *const ap_bus_attrs[] = { NULL, }; +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) + return 1; + return ap_test_config(ap_configuration->aqm, domain); +} + +/** + * ap_query_configuration(): Query AP configuration information. + * + * Query information of installed cards and configured domains from AP. + */ +static void ap_query_configuration(void) +{ +#ifdef CONFIG_64BIT + 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; +#else + ap_configuration = NULL; +#endif +} + /** * ap_select_domain(): Select an AP domain. * @@ -1005,6 +1098,7 @@ static struct bus_attribute *const ap_bus_attrs[] = { static int ap_select_domain(void) { int queue_depth, device_type, count, max_count, best_domain; + ap_qid_t qid; int rc, i, j; /* @@ -1018,9 +1112,13 @@ static int ap_select_domain(void) best_domain = -1; max_count = 0; for (i = 0; i < AP_DOMAINS; i++) { + if (!ap_test_config_domain(i)) + continue; count = 0; for (j = 0; j < AP_DEVICES; j++) { - ap_qid_t qid = AP_MKQID(j, i); + if (!ap_test_config_card_id(j)) + continue; + qid = AP_MKQID(j, i); rc = ap_query_queue(qid, &queue_depth, &device_type); if (rc) continue; @@ -1169,6 +1267,7 @@ static void ap_scan_bus(struct work_struct *unused) unsigned int device_functions; int rc, i; + ap_query_configuration(); if (ap_select_domain() != 0) return; for (i = 0; i < AP_DEVICES; i++) { @@ -1176,7 +1275,10 @@ static void ap_scan_bus(struct work_struct *unused) dev = bus_find_device(&ap_bus_type, NULL, (void *)(unsigned long)qid, __ap_scan_bus); - rc = ap_query_queue(qid, &queue_depth, &device_type); + if (ap_test_config_card_id(i)) + rc = ap_query_queue(qid, &queue_depth, &device_type); + else + rc = -ENODEV; if (dev) { if (rc == -EBUSY) { set_current_state(TASK_UNINTERRUPTIBLE); @@ -1227,9 +1329,9 @@ static void ap_scan_bus(struct work_struct *unused) kfree(ap_dev); continue; } - if (test_ap_facility(device_functions, 3)) + if (ap_test_bit(&device_functions, 3)) ap_dev->device_type = AP_DEVICE_TYPE_CEX3C; - else if (test_ap_facility(device_functions, 4)) + else if (ap_test_bit(&device_functions, 4)) ap_dev->device_type = AP_DEVICE_TYPE_CEX3A; else { kfree(ap_dev); @@ -1785,6 +1887,7 @@ int __init ap_module_init(void) goto out_root; } + ap_query_configuration(); if (ap_select_domain() == 0) ap_scan_bus(NULL); |