diff options
Diffstat (limited to 'drivers/s390/cio/vfio_ccw_drv.c')
-rw-r--r-- | drivers/s390/cio/vfio_ccw_drv.c | 58 |
1 files changed, 53 insertions, 5 deletions
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c index 9208c0e56c33..e401a3d0aa57 100644 --- a/drivers/s390/cio/vfio_ccw_drv.c +++ b/drivers/s390/cio/vfio_ccw_drv.c @@ -27,6 +27,9 @@ struct workqueue_struct *vfio_ccw_work_q; static struct kmem_cache *vfio_ccw_io_region; static struct kmem_cache *vfio_ccw_cmd_region; +debug_info_t *vfio_ccw_debug_msg_id; +debug_info_t *vfio_ccw_debug_trace_id; + /* * Helpers */ @@ -164,6 +167,9 @@ static int vfio_ccw_sch_probe(struct subchannel *sch) if (ret) goto out_disable; + VFIO_CCW_MSG_EVENT(4, "bound to subchannel %x.%x.%04x\n", + sch->schid.cssid, sch->schid.ssid, + sch->schid.sch_no); return 0; out_disable: @@ -194,6 +200,9 @@ static int vfio_ccw_sch_remove(struct subchannel *sch) kfree(private->cp.guest_cp); kfree(private); + VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n", + sch->schid.cssid, sch->schid.ssid, + sch->schid.sch_no); return 0; } @@ -263,27 +272,64 @@ static struct css_driver vfio_ccw_sch_driver = { .sch_event = vfio_ccw_sch_event, }; +static int __init vfio_ccw_debug_init(void) +{ + vfio_ccw_debug_msg_id = debug_register("vfio_ccw_msg", 16, 1, + 11 * sizeof(long)); + if (!vfio_ccw_debug_msg_id) + goto out_unregister; + debug_register_view(vfio_ccw_debug_msg_id, &debug_sprintf_view); + debug_set_level(vfio_ccw_debug_msg_id, 2); + vfio_ccw_debug_trace_id = debug_register("vfio_ccw_trace", 16, 1, 16); + if (!vfio_ccw_debug_trace_id) + goto out_unregister; + debug_register_view(vfio_ccw_debug_trace_id, &debug_hex_ascii_view); + debug_set_level(vfio_ccw_debug_trace_id, 2); + return 0; + +out_unregister: + debug_unregister(vfio_ccw_debug_msg_id); + debug_unregister(vfio_ccw_debug_trace_id); + return -1; +} + +static void vfio_ccw_debug_exit(void) +{ + debug_unregister(vfio_ccw_debug_msg_id); + debug_unregister(vfio_ccw_debug_trace_id); +} + static int __init vfio_ccw_sch_init(void) { - int ret = -ENOMEM; + int ret; + + ret = vfio_ccw_debug_init(); + if (ret) + return ret; vfio_ccw_work_q = create_singlethread_workqueue("vfio-ccw"); - if (!vfio_ccw_work_q) - return -ENOMEM; + if (!vfio_ccw_work_q) { + ret = -ENOMEM; + goto out_err; + } vfio_ccw_io_region = kmem_cache_create_usercopy("vfio_ccw_io_region", sizeof(struct ccw_io_region), 0, SLAB_ACCOUNT, 0, sizeof(struct ccw_io_region), NULL); - if (!vfio_ccw_io_region) + if (!vfio_ccw_io_region) { + ret = -ENOMEM; goto out_err; + } vfio_ccw_cmd_region = kmem_cache_create_usercopy("vfio_ccw_cmd_region", sizeof(struct ccw_cmd_region), 0, SLAB_ACCOUNT, 0, sizeof(struct ccw_cmd_region), NULL); - if (!vfio_ccw_cmd_region) + if (!vfio_ccw_cmd_region) { + ret = -ENOMEM; goto out_err; + } isc_register(VFIO_CCW_ISC); ret = css_driver_register(&vfio_ccw_sch_driver); @@ -298,6 +344,7 @@ out_err: kmem_cache_destroy(vfio_ccw_cmd_region); kmem_cache_destroy(vfio_ccw_io_region); destroy_workqueue(vfio_ccw_work_q); + vfio_ccw_debug_exit(); return ret; } @@ -308,6 +355,7 @@ static void __exit vfio_ccw_sch_exit(void) kmem_cache_destroy(vfio_ccw_io_region); kmem_cache_destroy(vfio_ccw_cmd_region); destroy_workqueue(vfio_ccw_work_q); + vfio_ccw_debug_exit(); } module_init(vfio_ccw_sch_init); module_exit(vfio_ccw_sch_exit); |