diff options
Diffstat (limited to 'drivers/staging/cdv/drv/psb_hotplug.h')
| -rw-r--r-- | drivers/staging/cdv/drv/psb_hotplug.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/staging/cdv/drv/psb_hotplug.h b/drivers/staging/cdv/drv/psb_hotplug.h new file mode 100644 index 000000000000..cffede5bafc9 --- /dev/null +++ b/drivers/staging/cdv/drv/psb_hotplug.h @@ -0,0 +1,90 @@ +/* + * Copyright © 2011 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + * Authors: + * James C. Gualario <james.c.gualario@intel.com> + * + */ +#ifndef _PSB_HOTPLUG_H_ +#define _PSB_HOTPLUG_H_ +/** + * required includes + * + */ +#include "psb_umevents.h" +/** + * hotplug specific defines + * + */ +#define DRM_HOTPLUG_RING_DEPTH 256 +#define DRM_HOTPLUG_RING_DEPTH_MAX (DRM_HOTPLUG_RING_DEPTH-1) +#define DRM_HOTPLUG_READY_TO_READ 1 +#define DRM_HOTPLUG_READ_COMPLETE 2 +/** + * hotplug workqueue data struct. + */ +struct hotplug_disp_workqueue_data { + struct work_struct work; + const char *dev_name; + int dev_name_write; + int dev_name_read; + int dev_name_write_wrap; + int dev_name_read_write_wrap_ack; + char dev_name_arry[DRM_HOTPLUG_RING_DEPTH][24]; + int dev_name_arry_rw_status[DRM_HOTPLUG_RING_DEPTH]; + struct umevent_list *hotplug_dev_list; +}; +/** + * hotplug state structure + * + */ +struct hotplug_state { + struct workqueue_struct *hotplug_wq; + struct hotplug_disp_workqueue_data hotplug_remove_wq_data; + struct hotplug_disp_workqueue_data hotplug_create_wq_data; + struct hotplug_disp_workqueue_data hotplug_change_wq_data; + struct umevent_list *list; +}; +/** + * main interface function prototytpes for hotplug support. + * + */ +struct hotplug_state *psb_hotplug_init(struct kobject *parent_kobj); +extern int psb_hotplug_notify_change_um(const char *name, + struct hotplug_state *state); +extern int psb_hotplug_create_and_notify_um(const char *name, + struct hotplug_state *state); +extern int psb_hotplug_remove_and_notify_um(const char *name, + struct hotplug_state *state); +extern struct umevent_list *psb_hotplug_device_pool_create_and_init( + struct kobject *parent_kobj, + struct hotplug_state *state); +extern void psb_hotplug_device_pool_destroy(struct hotplug_state *state); +/** + * to go back and forth between work strauct and workqueue data + * + */ +#define to_hotplug_disp_workqueue_data(x) \ + container_of(x, struct hotplug_disp_workqueue_data, work) + +/** + * function prototypes for workqueue implementation + * + */ +extern void psb_hotplug_dev_create_wq(struct work_struct *work); +extern void psb_hotplug_dev_remove_wq(struct work_struct *work); +extern void psb_hotplug_dev_change_wq(struct work_struct *work); +#endif |