[PATCH 2/4] drm/amdgpu: add core userqueue suspend/resume functions

[Shashank Sharma]

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

Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: Christian Koenig <christian.koe...@amd.com>
Signed-off-by: Shashank Sharma <shashank.sha...@amd.com>
---
 .../gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c  | 31 +++++++++++++++++++
 .../gpu/drm/amd/include/amdgpu_userqueue.h    |  5 +++
 2 files changed, 36 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 412970376b49..4e05da3c8f53 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0_userqueue.c
@@ -321,7 +321,38 @@ mes_v11_0_userq_mqd_destroy(struct amdgpu_userq_mgr 
*uq_mgr,
        amdgpu_userqueue_destroy_object(uq_mgr, &queue->mqd);
 }
 
+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 = 0;
+       }
+
+       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 = 1;
+       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 5416de0bdf25..afaf93faa824 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 */
-- 
2.43.2