diff mbox series

[07/12] accel/ivpu: Add resume engine support

Message ID 20240508132106.2387464-8-jacek.lawrynowicz@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series accel/ivpu: Changes for 6.10 | expand

Commit Message

Jacek Lawrynowicz May 8, 2024, 1:21 p.m. UTC 
From: "Wachowski, Karol" <karol.wachowski@intel.com>

Create debugfs interface that triggers sending resume engine IPC
command to VPU.

Signed-off-by: Wachowski, Karol <karol.wachowski@intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
---
 drivers/accel/ivpu/ivpu_debugfs.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

Comments

Jeffrey Hugo May 10, 2024, 4:42 p.m. UTC | #1 
On 5/8/2024 7:21 AM, Jacek Lawrynowicz wrote:
> From: "Wachowski, Karol" <karol.wachowski@intel.com>
> 
> Create debugfs interface that triggers sending resume engine IPC
> command to VPU.

Why?  Who would use this and for what purpose?

-Jeff
Jacek Lawrynowicz May 13, 2024, 10:11 a.m. UTC | #2 
Hi,

On 10.05.2024 18:42, Jeffrey Hugo wrote:
> On 5/8/2024 7:21 AM, Jacek Lawrynowicz wrote:
>> From: "Wachowski, Karol" <karol.wachowski@intel.com>
>>
>> Create debugfs interface that triggers sending resume engine IPC
>> command to VPU.
> 
> Why?  Who would use this and for what purpose?
This is used by our user space tests. I will extend the description.
diff mbox series

Patch

diff --git a/drivers/accel/ivpu/ivpu_debugfs.c b/drivers/accel/ivpu/ivpu_debugfs.c
index e07e447d08d1..6ff967e595cf 100644
--- a/drivers/accel/ivpu/ivpu_debugfs.c
+++ b/drivers/accel/ivpu/ivpu_debugfs.c
@@ -335,6 +335,28 @@  static const struct file_operations ivpu_reset_engine_fops = {
 	.write = ivpu_reset_engine_fn,
 };
 
+static ssize_t
+ivpu_resume_engine_fn(struct file *file, const char __user *user_buf, size_t size, loff_t *pos)
+{
+	struct ivpu_device *vdev = file->private_data;
+
+	if (!size)
+		return -EINVAL;
+
+	if (ivpu_jsm_hws_resume_engine(vdev, DRM_IVPU_ENGINE_COMPUTE))
+		return -ENODEV;
+	if (ivpu_jsm_hws_resume_engine(vdev, DRM_IVPU_ENGINE_COPY))
+		return -ENODEV;
+
+	return size;
+}
+
+static const struct file_operations ivpu_resume_engine_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = ivpu_resume_engine_fn,
+};
+
 void ivpu_debugfs_init(struct ivpu_device *vdev)
 {
 	struct dentry *debugfs_root = vdev->drm.debugfs_root;
@@ -358,6 +380,8 @@  void ivpu_debugfs_init(struct ivpu_device *vdev)
 
 	debugfs_create_file("reset_engine", 0200, debugfs_root, vdev,
 			    &ivpu_reset_engine_fops);
+	debugfs_create_file("resume_engine", 0200, debugfs_root, vdev,
+			    &ivpu_resume_engine_fops);
 
 	if (ivpu_hw_gen(vdev) >= IVPU_HW_40XX)
 		debugfs_create_file("fw_profiling_freq_drive", 0200,