From 40df6ea07a15032e33b6f3d415bed0774547ec7e Mon Sep 17 00:00:00 2001
From: Jike Song <jike.song@intel.com>
Date: Thu, 3 Nov 2016 18:38:33 +0800
Subject: [PATCH] drm/i915/gvt: introduce host_init/host_exit to MPT

GVT host needs init/exit hooks to do some initialization/cleanup
work, e.g.: vfio mdev host device register/unregister.

Signed-off-by: Jike Song <jike.song@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
 drivers/gpu/drm/i915/gvt/gvt.c       |  9 +++++++++
 drivers/gpu/drm/i915/gvt/hypercall.h |  2 ++
 drivers/gpu/drm/i915/gvt/mpt.h       | 21 +++++++++++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.c b/drivers/gpu/drm/i915/gvt/gvt.c
index 48a67d1e1893..13db29d045a4 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.c
+++ b/drivers/gpu/drm/i915/gvt/gvt.c
@@ -193,6 +193,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv)
 	intel_gvt_clean_mmio_info(gvt);
 	intel_gvt_free_firmware(gvt);
 
+	intel_gvt_hypervisor_host_exit(&dev_priv->drm.pdev->dev, gvt);
 	intel_gvt_clean_vgpu_types(gvt);
 
 	kfree(dev_priv->gvt);
@@ -276,11 +277,19 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 	if (ret)
 		goto out_clean_thread;
 
+	ret = intel_gvt_hypervisor_host_init(&dev_priv->drm.pdev->dev, gvt,
+				&intel_gvt_io_emulation_ops);
+	if (ret) {
+		gvt_err("failed to register gvt-g host device: %d\n", ret);
+		goto out_clean_types;
+	}
 
 	gvt_dbg_core("gvt device initialization is done\n");
 	dev_priv->gvt = gvt;
 	return 0;
 
+out_clean_types:
+	intel_gvt_clean_vgpu_types(gvt);
 out_clean_thread:
 	clean_service_thread(gvt);
 out_clean_cmd_parser:
diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
index 193fd38a96af..f3e926340983 100644
--- a/drivers/gpu/drm/i915/gvt/hypercall.h
+++ b/drivers/gpu/drm/i915/gvt/hypercall.h
@@ -48,6 +48,8 @@ extern struct intel_gvt_io_emulation_ops intel_gvt_io_emulation_ops;
  */
 struct intel_gvt_mpt {
 	int (*detect_host)(void);
+	int (*host_init)(struct device *dev, void *gvt, const void *ops);
+	void (*host_exit)(struct device *dev, void *gvt);
 	int (*attach_vgpu)(void *vgpu, unsigned long *handle);
 	void (*detach_vgpu)(unsigned long handle);
 	int (*inject_msi)(unsigned long handle, u32 addr, u16 data);
diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index 15e08dcb3199..93649b34798b 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -55,6 +55,27 @@ static inline int intel_gvt_hypervisor_detect_host(void)
 	return intel_gvt_host.mpt->detect_host();
 }
 
+/**
+ * intel_gvt_hypervisor_host_init - init GVT-g host side
+ *
+ * Returns:
+ * Zero on success, negative error code if failed
+ */
+static inline int intel_gvt_hypervisor_host_init(struct device *dev,
+			void *gvt, const void *ops)
+{
+	return intel_gvt_host.mpt->host_init(dev, gvt, ops);
+}
+
+/**
+ * intel_gvt_hypervisor_host_exit - exit GVT-g host side
+ */
+static inline void intel_gvt_hypervisor_host_exit(struct device *dev,
+			void *gvt)
+{
+	intel_gvt_host.mpt->host_exit(dev, gvt);
+}
+
 /**
  * intel_gvt_hypervisor_attach_vgpu - call hypervisor to initialize vGPU
  * related stuffs inside hypervisor.