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Date: Thu, 28 Feb 2013 16:43:02 -0800
From: John Stultz <john.stultz@...aro.org>
To: lkml <linux-kernel@...r.kernel.org>
Cc: Erik Gilling <konkers@...roid.com>,
Maarten Lankhorst <maarten.lankhorst@...onical.com>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Rob Clark <robclark@...il.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
Greg KH <gregkh@...uxfoundation.org>,
dri-devel@...ts.freedesktop.org,
Android Kernel Team <kernel-team@...roid.com>,
John Stultz <john.stultz@...aro.org>
Subject: [PATCH 06/30] staging: sync: Add ioctl to get fence data
From: Erik Gilling <konkers@...roid.com>
Add ioctl to get fence data
Cc: Maarten Lankhorst <maarten.lankhorst@...onical.com>
Cc: Erik Gilling <konkers@...roid.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Rob Clark <robclark@...il.com>
Cc: Sumit Semwal <sumit.semwal@...aro.org>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: dri-devel@...ts.freedesktop.org
Cc: Android Kernel Team <kernel-team@...roid.com>
Signed-off-by: Erik Gilling <konkers@...roid.com>
[jstultz: Commit message tweaks]
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
drivers/staging/android/sync.c | 81 ++++++++++++++++++++++++++++++++++++++++
drivers/staging/android/sync.h | 57 ++++++++++++++++++++++++++++
2 files changed, 138 insertions(+)
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 4ab55a3..f84caad 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -551,6 +551,84 @@ err_put_fd:
return err;
}
+static int sync_fill_pt_info(struct sync_pt *pt, void *data, int size)
+{
+ struct sync_pt_info *info = data;
+ int ret;
+
+ if (size < sizeof(struct sync_pt_info))
+ return -ENOMEM;
+
+ info->len = sizeof(struct sync_pt_info);
+
+ if (pt->parent->ops->fill_driver_data) {
+ ret = pt->parent->ops->fill_driver_data(pt, info->driver_data,
+ size - sizeof(*info));
+ if (ret < 0)
+ return ret;
+
+ info->len += ret;
+ }
+
+ strlcpy(info->obj_name, pt->parent->name, sizeof(info->obj_name));
+ strlcpy(info->driver_name, pt->parent->ops->driver_name,
+ sizeof(info->driver_name));
+ info->status = pt->status;
+ info->timestamp_ns = ktime_to_ns(pt->timestamp);
+
+ return info->len;
+}
+
+static long sync_fence_ioctl_fence_info(struct sync_fence *fence,
+ unsigned long arg)
+{
+ struct sync_fence_info_data *data;
+ struct list_head *pos;
+ __u32 size;
+ __u32 len = 0;
+ int ret;
+
+ if (copy_from_user(&size, (void __user *)arg, sizeof(size)))
+ return -EFAULT;
+
+ if (size < sizeof(struct sync_fence_info_data))
+ return -EINVAL;
+
+ if (size > 4096)
+ size = 4096;
+
+ data = kzalloc(size, GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ strlcpy(data->name, fence->name, sizeof(data->name));
+ data->status = fence->status;
+ len = sizeof(struct sync_fence_info_data);
+
+ list_for_each(pos, &fence->pt_list_head) {
+ struct sync_pt *pt =
+ container_of(pos, struct sync_pt, pt_list);
+
+ ret = sync_fill_pt_info(pt, (u8 *)data + len, size - len);
+
+ if (ret < 0)
+ goto out;
+
+ len += ret;
+ }
+
+ data->len = len;
+
+ if (copy_to_user((void __user *)arg, data, len))
+ ret = -EFAULT;
+ else
+ ret = 0;
+
+out:
+ kfree(data);
+
+ return ret;
+}
static long sync_fence_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
@@ -563,6 +641,9 @@ static long sync_fence_ioctl(struct file *file, unsigned int cmd,
case SYNC_IOC_MERGE:
return sync_fence_ioctl_merge(fence, arg);
+ case SYNC_IOC_FENCE_INFO:
+ return sync_fence_ioctl_fence_info(fence, arg);
+
default:
return -ENOTTY;
}
diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h
index d64271b..4f19938 100644
--- a/drivers/staging/android/sync.h
+++ b/drivers/staging/android/sync.h
@@ -43,6 +43,10 @@ struct sync_fence;
* should not print a newline
* @print_pt: print aditional debug information about sync_pt.
* should not print a newline
+ * @fill_driver_data: write implmentation specific driver data to data.
+ * should return an error if there is not enough room
+ * as specified by size. This information is returned
+ * to userspace by SYNC_IOC_FENCE_INFO.
*/
struct sync_timeline_ops {
const char *driver_name;
@@ -68,6 +72,9 @@ struct sync_timeline_ops {
/* optional */
void (*print_pt)(struct seq_file *s, struct sync_pt *sync_pt);
+
+ /* optional */
+ int (*fill_driver_data)(struct sync_pt *syncpt, void *data, int size);
};
/**
@@ -312,6 +319,42 @@ struct sync_merge_data {
__s32 fence; /* fd on newly created fence */
};
+/**
+ * struct sync_pt_info - detailed sync_pt information
+ * @len: length of sync_pt_info including any driver_data
+ * @obj_name: name of parent sync_timeline
+ * @driver_name: name of driver implmenting the parent
+ * @status: status of the sync_pt 0:active 1:signaled <0:error
+ * @timestamp_ns: timestamp of status change in nanoseconds
+ * @driver_data: any driver dependant data
+ */
+struct sync_pt_info {
+ __u32 len;
+ char obj_name[32];
+ char driver_name[32];
+ __s32 status;
+ __u64 timestamp_ns;
+
+ __u8 driver_data[0];
+};
+
+/**
+ * struct sync_fence_info_data - data returned from fence info ioctl
+ * @len: ioctl caller writes the size of the buffer its passing in.
+ * ioctl returns length of sync_fence_data reutnred to userspace
+ * including pt_info.
+ * @name: name of fence
+ * @status: status of fence. 1: signaled 0:active <0:error
+ * @pt_info: a sync_pt_info struct for every sync_pt in the fence
+ */
+struct sync_fence_info_data {
+ __u32 len;
+ char name[32];
+ __s32 status;
+
+ __u8 pt_info[0];
+};
+
#define SYNC_IOC_MAGIC '>'
/**
@@ -330,4 +373,18 @@ struct sync_merge_data {
*/
#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 1, struct sync_merge_data)
+/**
+ * DOC: SYNC_IOC_FENCE_INFO - get detailed information on a fence
+ *
+ * Takes a struct sync_fence_info_data with extra space allocated for pt_info.
+ * Caller should write the size of the buffer into len. On return, len is
+ * updated to reflect the total size of the sync_fence_info_data including
+ * pt_info.
+ *
+ * pt_info is a buffer containing sync_pt_infos for every sync_pt in the fence.
+ * To itterate over the sync_pt_infos, use the sync_pt_info.len field.
+ */
+#define SYNC_IOC_FENCE_INFO _IOWR(SYNC_IOC_MAGIC, 2,\
+ struct sync_fence_info_data)
+
#endif /* _LINUX_SYNC_H */
--
1.7.10.4
--
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