diff options
Diffstat (limited to 'drivers/s390/crypto/ap_bus.c')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 78c99ae42b1f..6d75984a3d85 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -47,9 +47,11 @@ #include <asm/facility.h> #include <linux/crypto.h> #include <linux/mod_devicetable.h> +#include <linux/debugfs.h> #include "ap_bus.h" #include "ap_asm.h" +#include "ap_debug.h" /* * Module description. @@ -82,6 +84,12 @@ static struct ap_config_info *ap_configuration; static bool initialised; /* + * AP bus related debug feature things. + */ +static struct dentry *ap_dbf_root; +debug_info_t *ap_dbf_info; + +/* * Workqueue timer for bus rescan. */ static struct timer_list ap_config_timer; @@ -568,6 +576,8 @@ static int ap_dev_resume(struct device *dev) static void ap_bus_suspend(void) { + AP_DBF(DBF_DEBUG, "ap_bus_suspend running\n"); + ap_suspend_flag = 1; /* * Disable scanning for devices, thus we do not want to scan @@ -603,6 +613,8 @@ static void ap_bus_resume(void) { int rc; + AP_DBF(DBF_DEBUG, "ap_bus_resume running\n"); + /* remove all queue devices */ bus_for_each_dev(&ap_bus_type, NULL, NULL, __ap_queue_devices_unregister); @@ -742,6 +754,9 @@ static ssize_t ap_domain_store(struct bus_type *bus, spin_lock_bh(&ap_domain_lock); ap_domain_index = domain; spin_unlock_bh(&ap_domain_lock); + + AP_DBF(DBF_DEBUG, "store new default domain=%d\n", domain); + return count; } @@ -964,6 +979,8 @@ static void ap_scan_bus(struct work_struct *unused) unsigned int functions = 0; int rc, id, dom, borked, domains; + AP_DBF(DBF_DEBUG, "ap_scan_bus running\n"); + ap_query_configuration(); if (ap_select_domain() != 0) goto out; @@ -1129,6 +1146,23 @@ static struct reset_call ap_reset_call = { .fn = ap_reset_all, }; +int __init ap_debug_init(void) +{ + ap_dbf_root = debugfs_create_dir("ap", NULL); + 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; +} + +void ap_debug_exit(void) +{ + debugfs_remove(ap_dbf_root); + debug_unregister(ap_dbf_info); +} + /** * ap_module_init(): The module initialization code. * @@ -1139,6 +1173,10 @@ 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() != 0) { pr_warn("The hardware system does not support AP instructions\n"); return -ENODEV; @@ -1266,6 +1304,8 @@ void ap_module_exit(void) unregister_reset_call(&ap_reset_call); if (ap_using_interrupts()) unregister_adapter_interrupt(&ap_airq); + + ap_debug_exit(); } module_init(ap_module_init); |