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/*
* 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>
*
*/
#include "psb_umevents.h"
#include "psb_hotplug.h"
/**
* inform the kernel of the work to be performed and related function.
*
*/
DECLARE_WORK(hotplug_dev_create_work, &psb_hotplug_dev_create_wq);
DECLARE_WORK(hotplug_dev_remove_work, &psb_hotplug_dev_remove_wq);
DECLARE_WORK(hotplug_dev_change_work, &psb_hotplug_dev_change_wq);
/**
* psb_hotplug_notify_change_um - notify user mode of hotplug changes
*
* @name: name of event to notify user mode of change to
* @state: hotplug state to search for event object in
*
*/
int psb_hotplug_notify_change_um(const char *name,
struct hotplug_state *state)
{
strcpy(&(state->hotplug_change_wq_data.dev_name_arry
[state->hotplug_change_wq_data.dev_name_write][0]), name);
state->hotplug_change_wq_data.dev_name_arry_rw_status
[state->hotplug_change_wq_data.dev_name_write] =
DRM_HOTPLUG_READY_TO_READ;
if (state->hotplug_change_wq_data.dev_name_read_write_wrap_ack == 1)
state->hotplug_change_wq_data.dev_name_read_write_wrap_ack = 0;
state->hotplug_change_wq_data.dev_name_write++;
if (state->hotplug_change_wq_data.dev_name_write ==
state->hotplug_change_wq_data.dev_name_read) {
state->hotplug_change_wq_data.dev_name_write--;
return IRQ_NONE;
}
if (state->hotplug_change_wq_data.dev_name_write >
DRM_HOTPLUG_RING_DEPTH_MAX) {
state->hotplug_change_wq_data.dev_name_write = 0;
state->hotplug_change_wq_data.dev_name_write_wrap = 1;
}
state->hotplug_change_wq_data.hotplug_dev_list = state->list;
queue_work(state->hotplug_wq, &(state->hotplug_change_wq_data.work));
return IRQ_HANDLED;
}
/**
*
* psb_hotplug_create_and_notify_um - create and notify user mode of new dev
*
* @name: name to give for new event / device
* @state: hotplug state to track new event /device in
*
*/
int psb_hotplug_create_and_notify_um(const char *name,
struct hotplug_state *state)
{
strcpy(&(state->hotplug_create_wq_data.dev_name_arry
[state->hotplug_create_wq_data.dev_name_write][0]), name);
state->hotplug_create_wq_data.dev_name_arry_rw_status
[state->hotplug_create_wq_data.dev_name_write] =
DRM_HOTPLUG_READY_TO_READ;
if (state->hotplug_create_wq_data.dev_name_read_write_wrap_ack == 1)
state->hotplug_create_wq_data.dev_name_read_write_wrap_ack = 0;
state->hotplug_create_wq_data.dev_name_write++;
if (state->hotplug_create_wq_data.dev_name_write ==
state->hotplug_create_wq_data.dev_name_read) {
state->hotplug_create_wq_data.dev_name_write--;
return IRQ_NONE;
}
if (state->hotplug_create_wq_data.dev_name_write >
DRM_HOTPLUG_RING_DEPTH_MAX) {
state->hotplug_create_wq_data.dev_name_write = 0;
state->hotplug_create_wq_data.dev_name_write_wrap = 1;
}
state->hotplug_create_wq_data.hotplug_dev_list = state->list;
queue_work(state->hotplug_wq, &(state->hotplug_create_wq_data.work));
return IRQ_HANDLED;
}
/*EXPORT_SYMBOL(psb_hotplug_create_and_notify_um); */
/**
* psb_hotplug_remove_and_notify_um - remove device and notify user mode
*
* @name: name of event / device to remove
* @state: hotplug state to remove event / device from
*
*/
int psb_hotplug_remove_and_notify_um(const char *name,
struct hotplug_state *state)
{
strcpy(&(state->hotplug_remove_wq_data.dev_name_arry
[state->hotplug_remove_wq_data.dev_name_write][0]), name);
state->hotplug_remove_wq_data.dev_name_arry_rw_status
[state->hotplug_remove_wq_data.dev_name_write] =
DRM_HOTPLUG_READY_TO_READ;
if (state->hotplug_remove_wq_data.dev_name_read_write_wrap_ack == 1)
state->hotplug_remove_wq_data.dev_name_read_write_wrap_ack = 0;
state->hotplug_remove_wq_data.dev_name_write++;
if (state->hotplug_remove_wq_data.dev_name_write ==
state->hotplug_remove_wq_data.dev_name_read) {
state->hotplug_remove_wq_data.dev_name_write--;
return IRQ_NONE;
}
if (state->hotplug_remove_wq_data.dev_name_write >
DRM_HOTPLUG_RING_DEPTH_MAX) {
state->hotplug_remove_wq_data.dev_name_write = 0;
state->hotplug_remove_wq_data.dev_name_write_wrap = 1;
}
state->hotplug_remove_wq_data.hotplug_dev_list = state->list;
queue_work(state->hotplug_wq, &(state->hotplug_remove_wq_data.work));
return IRQ_HANDLED;
}
/*EXPORT_SYMBOL(psb_hotplug_remove_and_notify_um); */
/**
* psb_hotplug_device_pool_create_and_init - make new hotplug device pool
*
* @parent_kobj: parent kobject to associate hotplug kset with
* @state: hotplug state to assocaite workqueues with
*
*/
struct umevent_list *psb_hotplug_device_pool_create_and_init(
struct kobject *parent_kobj,
struct hotplug_state *state)
{
struct umevent_list *new_hotplug_dev_list = NULL;
new_hotplug_dev_list = psb_umevent_create_list();
if (new_hotplug_dev_list)
psb_umevent_init(parent_kobj, new_hotplug_dev_list,
"psb_hotplug");
state->hotplug_wq = create_singlethread_workqueue("hotplug-wq");
if (!state->hotplug_wq)
return NULL;
INIT_WORK(&state->hotplug_create_wq_data.work,
psb_hotplug_dev_create_wq);
INIT_WORK(&state->hotplug_remove_wq_data.work,
psb_hotplug_dev_remove_wq);
INIT_WORK(&state->hotplug_change_wq_data.work,
psb_hotplug_dev_change_wq);
state->hotplug_create_wq_data.dev_name_read = 0;
state->hotplug_create_wq_data.dev_name_write = 0;
state->hotplug_create_wq_data.dev_name_write_wrap = 0;
state->hotplug_create_wq_data.dev_name_read_write_wrap_ack = 0;
memset(&(state->hotplug_create_wq_data.dev_name_arry_rw_status[0]),
0, sizeof(int)*DRM_HOTPLUG_RING_DEPTH);
state->hotplug_remove_wq_data.dev_name_read = 0;
state->hotplug_remove_wq_data.dev_name_write = 0;
state->hotplug_remove_wq_data.dev_name_write_wrap = 0;
state->hotplug_remove_wq_data.dev_name_read_write_wrap_ack = 0;
memset(&(state->hotplug_remove_wq_data.dev_name_arry_rw_status[0]),
0, sizeof(int)*DRM_HOTPLUG_RING_DEPTH);
state->hotplug_change_wq_data.dev_name_read = 0;
state->hotplug_change_wq_data.dev_name_write = 0;
state->hotplug_change_wq_data.dev_name_write_wrap = 0;
state->hotplug_change_wq_data.dev_name_read_write_wrap_ack = 0;
memset(&(state->hotplug_change_wq_data.dev_name_arry_rw_status[0]),
0, sizeof(int)*DRM_HOTPLUG_RING_DEPTH);
return new_hotplug_dev_list;
}
/*EXPORT_SYMBOL(psb_hotplug_device_pool_create_and_init); */
/**
*
* psb_hotplug_init - init hotplug subsystem
*
* @parent_kobj: parent kobject to associate hotplug state with
*
*/
struct hotplug_state *psb_hotplug_init(struct kobject *parent_kobj)
{
struct hotplug_state *state;
state = kzalloc(sizeof(struct hotplug_state), GFP_KERNEL);
if (!state)
return state;
state->list = NULL;
state->list = psb_hotplug_device_pool_create_and_init(
parent_kobj,
state);
psb_hotplug_create_and_notify_um("hpd_hdmi", state);
return state;
}
/**
* psb_hotplug_device_pool_destroy - destroy all hotplug related resources
*
* @state: hotplug state to destroy
*
*/
void psb_hotplug_device_pool_destroy(struct hotplug_state *state)
{
flush_workqueue(state->hotplug_wq);
destroy_workqueue(state->hotplug_wq);
psb_umevent_cleanup(state->list);
kfree(state);
}
/*EXPORT_SYMBOL(psb_hotplug_device_pool_destroy); */
/**
* psb_hotplug_dev_create_wq - create workqueue implementation
*
* @work: work struct to use for kernel scheduling
*
*/
void psb_hotplug_dev_create_wq(struct work_struct *work)
{
struct hotplug_disp_workqueue_data *wq_data;
/* struct umevent_obj *wq_working_hotplug_disp_obj; */
wq_data = to_hotplug_disp_workqueue_data(work);
if (wq_data->dev_name_write_wrap == 1) {
wq_data->dev_name_read_write_wrap_ack = 1;
wq_data->dev_name_write_wrap = 0;
while (wq_data->dev_name_read != DRM_HOTPLUG_RING_DEPTH_MAX) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
/*
wq_working_hotplug_disp_obj =
psb_create_umevent_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
*/
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
/* psb_umevent_notify
(wq_working_hotplug_disp_obj);*/
}
wq_data->dev_name_read++;
}
wq_data->dev_name_read = 0;
while (wq_data->dev_name_read < wq_data->dev_name_write-1) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
/*
wq_working_hotplug_disp_obj =
psb_create_umevent_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
*/
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
/*psb_umevent_notify
(wq_working_hotplug_disp_obj);*/
}
wq_data->dev_name_read++;
}
} else {
while (wq_data->dev_name_read < wq_data->dev_name_write) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
/*
wq_working_hotplug_disp_obj =
psb_create_umevent_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
*/
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
/*psb_umevent_notify
(wq_working_hotplug_disp_obj);*/
}
wq_data->dev_name_read++;
}
}
if (wq_data->dev_name_read > DRM_HOTPLUG_RING_DEPTH_MAX)
wq_data->dev_name_read = 0;
}
/*EXPORT_SYMBOL(psb_hotplug_dev_create_wq); */
/**
* psb_hotplug_dev_remove_wq - remove workqueue implementation
*
* @work: work struct to use for kernel scheduling
*
*/
void psb_hotplug_dev_remove_wq(struct work_struct *work)
{
struct hotplug_disp_workqueue_data *wq_data;
wq_data = to_hotplug_disp_workqueue_data(work);
if (wq_data->dev_name_write_wrap == 1) {
wq_data->dev_name_read_write_wrap_ack = 1;
wq_data->dev_name_write_wrap = 0;
while (wq_data->dev_name_read != DRM_HOTPLUG_RING_DEPTH_MAX) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
psb_umevent_remove_from_list(
wq_data->hotplug_dev_list,
&wq_data->dev_name_arry
[wq_data->dev_name_read][0]);
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
}
wq_data->dev_name_read++;
}
wq_data->dev_name_read = 0;
while (wq_data->dev_name_read < wq_data->dev_name_write-1) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
psb_umevent_remove_from_list(
wq_data->hotplug_dev_list,
&wq_data->dev_name_arry
[wq_data->dev_name_read][0]);
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
}
wq_data->dev_name_read++;
}
} else {
while (wq_data->dev_name_read < wq_data->dev_name_write) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
psb_umevent_remove_from_list(
wq_data->hotplug_dev_list,
&wq_data->dev_name_arry
[wq_data->dev_name_read][0]);
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
}
wq_data->dev_name_read++;
}
}
if (wq_data->dev_name_read > DRM_HOTPLUG_RING_DEPTH_MAX)
wq_data->dev_name_read = 0;
}
/*EXPORT_SYMBOL(psb_hotplug_dev_remove_wq); */
/**
* psb_hotplug_dev_change_wq - change workqueue implementation
*
* @work: work struct to use for kernel scheduling
*
*/
void psb_hotplug_dev_change_wq(struct work_struct *work)
{
struct hotplug_disp_workqueue_data *wq_data;
struct umevent_obj *wq_working_hotplug_disp_obj;
wq_data = to_hotplug_disp_workqueue_data(work);
if (wq_data->dev_name_write_wrap == 1) {
wq_data->dev_name_read_write_wrap_ack = 1;
wq_data->dev_name_write_wrap = 0;
while (wq_data->dev_name_read != DRM_HOTPLUG_RING_DEPTH_MAX) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
wq_working_hotplug_disp_obj =
psb_umevent_find_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
psb_umevent_notify_change_gfxsock
(wq_working_hotplug_disp_obj,
DRM_HOTPLUG_SOCKET_GROUP_ID);
}
wq_data->dev_name_read++;
}
wq_data->dev_name_read = 0;
while (wq_data->dev_name_read < wq_data->dev_name_write-1) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
wq_working_hotplug_disp_obj =
psb_umevent_find_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
psb_umevent_notify_change_gfxsock
(wq_working_hotplug_disp_obj,
DRM_HOTPLUG_SOCKET_GROUP_ID);
}
wq_data->dev_name_read++;
}
} else {
while (wq_data->dev_name_read < wq_data->dev_name_write) {
if (wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] ==
DRM_HOTPLUG_READY_TO_READ) {
wq_data->dev_name_arry_rw_status
[wq_data->dev_name_read] =
DRM_HOTPLUG_READ_COMPLETE;
wq_working_hotplug_disp_obj =
psb_umevent_find_obj(
&wq_data->dev_name_arry
[wq_data->dev_name_read][0],
wq_data->hotplug_dev_list);
psb_umevent_notify_change_gfxsock
(wq_working_hotplug_disp_obj,
DRM_HOTPLUG_SOCKET_GROUP_ID);
}
wq_data->dev_name_read++;
}
}
if (wq_data->dev_name_read > DRM_HOTPLUG_RING_DEPTH_MAX)
wq_data->dev_name_read = 0;
}
/*EXPORT_SYMBOL(psb_hotplug_dev_change_wq); */
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