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Date: Mon, 26 May 2014 10:17:18 +0200
From: Andrzej Hajda <a.hajda@...sung.com>
To: dri-devel@...ts.freedesktop.org
Cc: YoungJun Cho <yj44.cho@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Inki Dae <inki.dae@...sung.com>,
Joonyoung Shim <jy0922.shim@...sung.com>,
Seung-Woo Kim <sw0312.kim@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
linux-samsung-soc@...r.kernel.org (moderated list:ARM/S5P EXYNOS AR...),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 4/9] drm/exynos: ipp: add cmd_lock for cmd_list
From: YoungJun Cho <yj44.cho@...sung.com>
This patch adds cmd_lock for cmd_list synchronization.
Signed-off-by: YoungJun Cho <yj44.cho@...sung.com>
Acked-by: Seong-Woo Kim <sw0312.kim@...sung.com>
Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
Tested-by: Andrzej Hajda <a.hajda@...sung.com>
---
drivers/gpu/drm/exynos/exynos_drm_ipp.c | 20 ++++++++++++++++++--
drivers/gpu/drm/exynos/exynos_drm_ipp.h | 2 ++
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 0d85433..b60ae54 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -284,9 +284,14 @@ static struct exynos_drm_ippdrv *ipp_find_drv_by_handle(u32 prop_id)
list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n", count++, (int)ippdrv);
- list_for_each_entry(c_node, &ippdrv->cmd_list, list)
- if (c_node->property.prop_id == prop_id)
+ mutex_lock(&ippdrv->cmd_lock);
+ list_for_each_entry(c_node, &ippdrv->cmd_list, list) {
+ if (c_node->property.prop_id == prop_id) {
+ mutex_unlock(&ippdrv->cmd_lock);
return ippdrv;
+ }
+ }
+ mutex_unlock(&ippdrv->cmd_lock);
}
return ERR_PTR(-ENODEV);
@@ -318,6 +323,7 @@ int exynos_drm_ipp_get_property(struct drm_device *drm_dev, void *data,
if (!prop_list->ipp_id) {
list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list)
count++;
+
/*
* Supports ippdrv list count for user application.
* First step user application getting ippdrv count.
@@ -379,9 +385,11 @@ static int ipp_find_and_set_property(struct drm_exynos_ipp_property *property)
* when we find this command no using prop_id.
* return property information set in this command node.
*/
+ mutex_lock(&ippdrv->cmd_lock);
list_for_each_entry(c_node, &ippdrv->cmd_list, list) {
if ((c_node->property.prop_id == prop_id) &&
(c_node->state == IPP_STATE_STOP)) {
+ mutex_unlock(&ippdrv->cmd_lock);
DRM_DEBUG_KMS("found cmd[%d]ippdrv[0x%x]\n",
property->cmd, (int)ippdrv);
@@ -389,6 +397,7 @@ static int ipp_find_and_set_property(struct drm_exynos_ipp_property *property)
return 0;
}
}
+ mutex_unlock(&ippdrv->cmd_lock);
DRM_ERROR("failed to search property.\n");
@@ -519,7 +528,9 @@ int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
INIT_LIST_HEAD(&c_node->event_list);
list_splice_init(&priv->event_list, &c_node->event_list);
+ mutex_lock(&ippdrv->cmd_lock);
list_add_tail(&c_node->list, &ippdrv->cmd_list);
+ mutex_unlock(&ippdrv->cmd_lock);
/* make dedicated state without m2m */
if (!ipp_is_m2m_cmd(property->cmd))
@@ -1110,10 +1121,12 @@ int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
c_node->state = IPP_STATE_STOP;
ippdrv->dedicated = false;
+ mutex_lock(&ippdrv->cmd_lock);
ipp_clean_cmd_node(c_node);
if (list_empty(&ippdrv->cmd_list))
pm_runtime_put_sync(ippdrv->dev);
+ mutex_unlock(&ippdrv->cmd_lock);
break;
case IPP_CTRL_PAUSE:
cmd_work = c_node->stop_work;
@@ -1688,6 +1701,7 @@ static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
ippdrv->event_workq = ctx->event_workq;
ippdrv->sched_event = ipp_sched_event;
INIT_LIST_HEAD(&ippdrv->cmd_list);
+ mutex_init(&ippdrv->cmd_lock);
if (is_drm_iommu_supported(drm_dev)) {
ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
@@ -1757,6 +1771,7 @@ static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
DRM_DEBUG_KMS("for priv[0x%x]\n", (int)priv);
list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
+ mutex_lock(&ippdrv->cmd_lock);
list_for_each_entry_safe(c_node, tc_node,
&ippdrv->cmd_list, list) {
DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n",
@@ -1781,6 +1796,7 @@ static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
pm_runtime_put_sync(ippdrv->dev);
}
}
+ mutex_unlock(&ippdrv->cmd_lock);
}
kfree(priv);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.h b/drivers/gpu/drm/exynos/exynos_drm_ipp.h
index fbb80ac..09cb5a2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.h
@@ -148,6 +148,7 @@ struct exynos_drm_ipp_ops {
* @event_workq: event work queue.
* @c_node: current command information.
* @cmd_list: list head for command information.
+ * @cmd_lock: lock for synchronization of access to cmd_list.
* @prop_list: property informations of current ipp driver.
* @check_property: check property about format, size, buffer.
* @reset: reset ipp block.
@@ -165,6 +166,7 @@ struct exynos_drm_ippdrv {
struct workqueue_struct *event_workq;
struct drm_exynos_ipp_cmd_node *c_node;
struct list_head cmd_list;
+ struct mutex cmd_lock;
struct drm_exynos_ipp_prop_list prop_list;
int (*check_property)(struct device *dev,
--
1.9.1
--
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