drm/i915/gvt: refactor intel_gvt_io_emulation_ops to be intel_gvt_ops

There are currently 4 methods in intel_gvt_io_emulation_ops
to emulate CFG/MMIO reading/writing for intel vGPU. A possibly
better scope is: add 3 more methods for vgpu create/destroy/reset
respectively, and rename the ops to 'intel_gvt_ops', then pass
it to the MPT module (say the future kvmgt) to use: they are
all methods for external usage.

Signed-off-by: Jike Song <jike.song@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/gvt/cfg_space.c

@@ -47,11 +47,9 @@ enum {
  * Returns:
  * Zero on success, negative error code if failed.
  */
-int intel_vgpu_emulate_cfg_read(void *__vgpu, unsigned int offset,
+int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset,
 	void *p_data, unsigned int bytes)
 {
-	struct intel_vgpu *vgpu = __vgpu;
-
 	if (WARN_ON(bytes > 4))
 		return -EINVAL;
 
@@ -234,10 +232,9 @@ static int emulate_pci_bar_write(struct intel_vgpu *vgpu, unsigned int offset,
  * Returns:
  * Zero on success, negative error code if failed.
  */
-int intel_vgpu_emulate_cfg_write(void *__vgpu, unsigned int offset,
+int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset,
 	void *p_data, unsigned int bytes)
 {
-	struct intel_vgpu *vgpu = __vgpu;
 	int ret;
 
 	if (WARN_ON(bytes > 4))

drivers/gpu/drm/i915/gvt/gvt.c

@@ -44,11 +44,14 @@ static const char * const supported_hypervisors[] = {
 	[INTEL_GVT_HYPERVISOR_KVM] = "KVM",
 };
 
-struct intel_gvt_io_emulation_ops intel_gvt_io_emulation_ops = {
+static const struct intel_gvt_ops intel_gvt_ops = {
 	.emulate_cfg_read = intel_vgpu_emulate_cfg_read,
 	.emulate_cfg_write = intel_vgpu_emulate_cfg_write,
 	.emulate_mmio_read = intel_vgpu_emulate_mmio_read,
 	.emulate_mmio_write = intel_vgpu_emulate_mmio_write,
+	.vgpu_create = intel_gvt_create_vgpu,
+	.vgpu_destroy = intel_gvt_destroy_vgpu,
+	.vgpu_reset = intel_gvt_reset_vgpu,
 };
 
 /**
@@ -278,7 +281,7 @@ int intel_gvt_init_device(struct drm_i915_private *dev_priv)
 		goto out_clean_thread;
 
 	ret = intel_gvt_hypervisor_host_init(&dev_priv->drm.pdev->dev, gvt,
-				&intel_gvt_io_emulation_ops);
+				&intel_gvt_ops);
 	if (ret) {
 		gvt_err("failed to register gvt-g host device: %d\n", ret);
 		goto out_clean_types;

drivers/gpu/drm/i915/gvt/gvt.h

@@ -356,6 +356,7 @@ void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt);
 struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
 					 struct intel_vgpu_type *type);
 void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu);
+void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu);
 
 
 /* validating GM functions */
@@ -391,10 +392,10 @@ int intel_gvt_ggtt_index_g2h(struct intel_vgpu *vgpu, unsigned long g_index,
 int intel_gvt_ggtt_h2g_index(struct intel_vgpu *vgpu, unsigned long h_index,
 			     unsigned long *g_index);
 
-int intel_vgpu_emulate_cfg_read(void *__vgpu, unsigned int offset,
+int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset,
 		void *p_data, unsigned int bytes);
 
-int intel_vgpu_emulate_cfg_write(void *__vgpu, unsigned int offset,
+int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset,
 		void *p_data, unsigned int bytes);
 
 void intel_gvt_clean_opregion(struct intel_gvt *gvt);
@@ -407,6 +408,22 @@ int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci);
 int setup_vgpu_mmio(struct intel_vgpu *vgpu);
 void populate_pvinfo_page(struct intel_vgpu *vgpu);
 
+struct intel_gvt_ops {
+	int (*emulate_cfg_read)(struct intel_vgpu *, unsigned int, void *,
+				unsigned int);
+	int (*emulate_cfg_write)(struct intel_vgpu *, unsigned int, void *,
+				unsigned int);
+	int (*emulate_mmio_read)(struct intel_vgpu *, u64, void *,
+				unsigned int);
+	int (*emulate_mmio_write)(struct intel_vgpu *, u64, void *,
+				unsigned int);
+	struct intel_vgpu *(*vgpu_create)(struct intel_gvt *,
+				struct intel_vgpu_type *);
+	void (*vgpu_destroy)(struct intel_vgpu *);
+	void (*vgpu_reset)(struct intel_vgpu *);
+};
+
+
 #include "mpt.h"
 
 #endif

drivers/gpu/drm/i915/gvt/hypercall.h

@@ -33,15 +33,6 @@
 #ifndef _GVT_HYPERCALL_H_
 #define _GVT_HYPERCALL_H_
 
-struct intel_gvt_io_emulation_ops {
-	int (*emulate_cfg_read)(void *, unsigned int, void *, unsigned int);
-	int (*emulate_cfg_write)(void *, unsigned int, void *, unsigned int);
-	int (*emulate_mmio_read)(void *, u64, void *, unsigned int);
-	int (*emulate_mmio_write)(void *, u64, void *, unsigned int);
-};
-
-extern struct intel_gvt_io_emulation_ops intel_gvt_io_emulation_ops;
-
 /*
  * Specific GVT-g MPT modules function collections. Currently GVT-g supports
  * both Xen and KVM by providing dedicated hypervisor-related MPT modules.

drivers/gpu/drm/i915/gvt/mmio.c

@@ -67,10 +67,9 @@ int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
  * Returns:
  * Zero on success, negative error code if failed
  */
-int intel_vgpu_emulate_mmio_read(void *__vgpu, uint64_t pa,
+int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
 		void *p_data, unsigned int bytes)
 {
-	struct intel_vgpu *vgpu = __vgpu;
 	struct intel_gvt *gvt = vgpu->gvt;
 	struct intel_gvt_mmio_info *mmio;
 	unsigned int offset = 0;
@@ -179,10 +178,9 @@ err:
  * Returns:
  * Zero on success, negative error code if failed
  */
-int intel_vgpu_emulate_mmio_write(void *__vgpu, uint64_t pa,
+int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
 		void *p_data, unsigned int bytes)
 {
-	struct intel_vgpu *vgpu = __vgpu;
 	struct intel_gvt *gvt = vgpu->gvt;
 	struct intel_gvt_mmio_info *mmio;
 	unsigned int offset = 0;

drivers/gpu/drm/i915/gvt/mmio.h

@@ -87,10 +87,11 @@ struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt,
 })
 
 int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa);
-int intel_vgpu_emulate_mmio_read(void *__vgpu, u64 pa, void *p_data,
-				 unsigned int bytes);
-int intel_vgpu_emulate_mmio_write(void *__vgpu, u64 pa, void *p_data,
-				  unsigned int bytes);
+
+int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, u64 pa,
+				void *p_data, unsigned int bytes);
+int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, u64 pa,
+				void *p_data, unsigned int bytes);
 bool intel_gvt_mmio_is_cmd_access(struct intel_gvt *gvt,
 				  unsigned int offset);
 bool intel_gvt_mmio_is_unalign(struct intel_gvt *gvt, unsigned int offset);

drivers/gpu/drm/i915/gvt/vgpu.c

@@ -390,3 +390,14 @@ struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
 
 	return vgpu;
 }
+
+/**
+ * intel_gvt_reset_vgpu - reset a virtual GPU
+ * @vgpu: virtual GPU
+ *
+ * This function is called when user wants to reset a virtual GPU.
+ *
+ */
+void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu)
+{
+}