[PATCH 1/2] drm/amdgpu: add new mes misc api for gfx11

new api will be used to workaround a HW scheduler issue
for 100% usage when gpu has no workload.

Signed-off-by: Eric Huang <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 23 +++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h |  4 ++++
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c  |  5 ++++-
 3 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
index b96f94e5169f..421d937c1188 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c
@@ -1140,6 +1140,29 @@ void amdgpu_mes_free_gang_ctx_index(struct amdgpu_mes *mes,
 	amdgpu_mes_unlock(mes);
 }
 
+int amdgpu_mes_notify_unmap_queue(struct amdgpu_device *adev)
+{
+	struct mes_misc_op_input op_input = {0};
+	int r;
+
+	op_input.op = MES_MISC_NOTIFY_WORK_ON_UNMAPPED_QUEUE;
+
+	if (!adev->mes.funcs->misc_op) {
+		dev_err(adev->dev, "mes notify unmap queue is not supported!\n");
+		r = -EINVAL;
+		goto error;
+	}
+
+	amdgpu_mes_lock(&adev->mes);
+	r = adev->mes.funcs->misc_op(&adev->mes, &op_input);
+	amdgpu_mes_unlock(&adev->mes);
+	if (r)
+		dev_err(adev->dev, "failed to notify unmap queue.\n");
+
+error:
+	return r;
+}
+
 #if defined(CONFIG_DEBUG_FS)
 
 static int amdgpu_debugfs_mes_event_log_show(struct seq_file *m, void *unused)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
index 977c057dcce8..5230b1ba1a46 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
@@ -366,6 +366,7 @@ enum mes_misc_opcode {
 	MES_MISC_OP_WRM_REG_WR_WAIT,
 	MES_MISC_OP_SET_SHADER_DEBUGGER,
 	MES_MISC_OP_CHANGE_CONFIG,
+	MES_MISC_NOTIFY_WORK_ON_UNMAPPED_QUEUE
 };
 
 struct mes_misc_op_input {
@@ -643,4 +644,7 @@ int amdgpu_mes_alloc_gang_ctx_index(struct amdgpu_mes *mes,
 				    uint32_t *index);
 void amdgpu_mes_free_gang_ctx_index(struct amdgpu_mes *mes,
 				    uint32_t index);
+
+int amdgpu_mes_notify_unmap_queue(struct amdgpu_device *adev);
+
 #endif /* __AMDGPU_MES_H__ */
diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index a0b874c9ee7b..bc0ee6ccfca7 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -957,7 +957,10 @@ static int mes_v11_0_misc_op(struct amdgpu_mes *mes,
 		misc_pkt.change_config.option.bits.limit_single_process =
 				input->change_config.option.limit_single_process;
 		break;
-
+	case MES_MISC_NOTIFY_WORK_ON_UNMAPPED_QUEUE:
+		misc_pkt.opcode = MESAPI_MISC__NOTIFY_WORK_ON_UNMAPPED_QUEUE;
+		misc_pkt.queue_sch_level = AMD_PRIORITY_LEVEL_NORMAL;
+		break;
 	default:
 		drm_err(adev_to_drm(mes->adev), "unsupported misc op (%d)\n", input->op);
 		return -EINVAL;
-- 
2.34.1