[PATCH v11 22/28] drm/amdgpu: add userqueue suspend/resume functions

[Shashank Sharma <shashank.sharma@amd.com>]

This patch adds userqueue suspend/resume functions at
core MES V11 IP level.

V2: use true/false for queue_active status (Christian)
    added Christian's R-B

V3: reset/set queue status in mqd.create and mqd.destroy

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Arvind Yadav <arvind.yadav@amd.com>
---
 .../gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c  | 33 +++++++++++++++++++
 .../gpu/drm/amd/include/amdgpu_userqueue.h    |  5 +++
 2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c
index b3aa49ff1a87..51c9a215ae77 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c
@@ -331,6 +331,7 @@ static int mes_v11_0_userq_mqd_create(struct amdgpu_userq_mgr *uq_mgr,
 		goto free_ctx;
 	}
 
+	queue->queue_active = true;
 	return 0;
 
 free_ctx:
@@ -354,9 +355,41 @@ mes_v11_0_userq_mqd_destroy(struct amdgpu_userq_mgr *uq_mgr,
 	amdgpu_userqueue_destroy_object(uq_mgr, &queue->fw_obj);
 	kfree(queue->userq_prop);
 	amdgpu_userqueue_destroy_object(uq_mgr, &queue->mqd);
+	queue->queue_active = false;
+}
+
+static int mes_v11_0_userq_suspend(struct amdgpu_userq_mgr *uq_mgr,
+				   struct amdgpu_usermode_queue *queue)
+{
+	if (queue->queue_active) {
+		mes_v11_0_userq_unmap(uq_mgr, queue);
+		queue->queue_active = false;
+	}
+
+	return 0;
+}
+
+static int mes_v11_0_userq_resume(struct amdgpu_userq_mgr *uq_mgr,
+				  struct amdgpu_usermode_queue *queue)
+{
+	int ret;
+
+	if (queue->queue_active)
+		return 0;
+
+	ret = mes_v11_0_userq_map(uq_mgr, queue, queue->userq_prop);
+	if (ret) {
+		DRM_ERROR("Failed to resume queue\n");
+		return ret;
+	}
+
+	queue->queue_active = true;
+	return 0;
 }
 
 const struct amdgpu_userq_funcs userq_mes_v11_0_funcs = {
 	.mqd_create = mes_v11_0_userq_mqd_create,
 	.mqd_destroy = mes_v11_0_userq_mqd_destroy,
+	.suspend = mes_v11_0_userq_suspend,
+	.resume = mes_v11_0_userq_resume,
 };
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index 77a33f9e37f8..37be29048f42 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -37,6 +37,7 @@ struct amdgpu_userq_obj {
 
 struct amdgpu_usermode_queue {
 	int			queue_type;
+	uint8_t			queue_active;
 	uint64_t		doorbell_handle;
 	uint64_t		doorbell_index;
 	uint64_t		flags;
@@ -57,6 +58,10 @@ struct amdgpu_userq_funcs {
 			  struct amdgpu_usermode_queue *queue);
 	void (*mqd_destroy)(struct amdgpu_userq_mgr *uq_mgr,
 			    struct amdgpu_usermode_queue *uq);
+	int (*suspend)(struct amdgpu_userq_mgr *uq_mgr,
+		       struct amdgpu_usermode_queue *queue);
+	int (*resume)(struct amdgpu_userq_mgr *uq_mgr,
+		      struct amdgpu_usermode_queue *queue);
 };
 
 /* Usermode queues for gfx */
-- 
2.45.1